JP2608028B2 - Control equipment for glassware forming 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 control apparatus for a glass forming machine, and more particularly to a control apparatus for outputting a control signal by providing a plurality of work stations, that is, electronic cam switches for each section, for one rotary drive spindle. Related to what you can do.

[0002]

2. Description of the Related Art Consistent mass production in which products are produced in parallel on a plurality of production lines, finished products in each line are synchronously sent to a common line, and a plurality of products sent to the common line are palletized. System exists.
FIG. 3 shows an example of such a mass production system by layout. What is indicated by # 1 to #n is
A separate production line or section, and each such production line or section will be referred to herein as a station. That is, each of the stations # 1 to #n
Are automated production lines or sections that automatically produce products individually. Arrow X indicates the direction of transport of the semi-finished product in the station. Each station # 1
A plurality of actuators or robots (hereinafter, collectively referred to as actuators) A1 to An for automatic operation are provided in a predetermined arrangement on the paths of the transfer lines # 1 to #n.

At the end of each of the stations # 1 to #n, there is provided a transfer actuator B for sending out products to the conveyor CVY. Arrow Y is conveyor CVY
Shows the transport direction of the above product. At the end of the conveyor CVY, an actuator C for checking product quality or for other purposes is provided as necessary. A palletizing device PLT is provided at the end of the conveyor CVY. The palletizing device PLT operates in response to the operation of the actuator D, and arranges and stores products conveyed by the conveyor CVY on the pallet P.

[0004] A master device is provided for distributing and supplying materials or parts to each of the stations # 1 to #n. This master device has a spindle MS driven by a motor or the like (not shown). Materials or parts are distributed and supplied to each of the stations # 1 to #n according to the rotation of the spindle MS. Each of the stations # 1 to #n functions as a kind of slave device for the master device. That is, each of the stations # 1 to #n starts operation and performs various operations in synchronization with the operation of the master device. The transport operation of the semi-finished product in each of the stations # 1 to #n is also controlled in conjunction with the rotation of the spindle MS. For example, the transport operation of the semi-finished product in each of the stations # 1 to #n may be executed mechanically in conjunction with the rotation of the spindle MS, or according to the rotational position detection data of the spindle MS. By controlling the transport driving of the semi-finished product in each of the stations # 1 to #n, the transport operation may be performed in conjunction with the rotation of the main shaft MS. The conveyor CVY may be configured to be driven with independent speed control.
The control may be performed in conjunction with the rotation of the main shaft MS. The actuators A1 to An, B, C, D
For the purpose, solenoids, cylinders, motors, injectors, blowers, and the like according to the work purpose of each step are used.

When this is applied to the process of manufacturing glass bottles, the entire line in FIG. 3 corresponds to a glass bottle forming machine, and the material (ie, molten glass) is transferred to each of the stations # 1 to # 1 in conjunction with the rotation of the spindle MS. #N, a series of bin manufacturing processes such as insertion of materials into the rough mold, rough molding by blow or press, finish molding by blow, slow cooling, printing, etc. are performed in parallel at each station # 1 to #n. Done. In this case, the operation events of the actuators A1 to An, B and C and D for each of the stations # 1 to #n are controlled at predetermined timings in synchronization with the rotation of the spindle MS.

In such a conventional glass molding machine, a large number of mechanical cam switches are provided on the spindle MS for such synchronous control, and the operation event of each actuator is determined by a signal output from the mechanical cam switch. Had to control. In this case, each station # 1 to #
Since the operation of n must be controlled independently, a cam switch group corresponding to each of the actuators A1 to An, B, C, and D must be provided for each of the stations # 1 to #n. When each of the stations # 1 to #n starts operation in a predetermined order with a time difference and ends operation, the stations # 1 to #n can perform mutual sequential operation start and end timing control. It is necessary to mount the cam switch for each n while appropriately offsetting it with respect to the origin of the spindle MS.

[0007]

By the way, a mechanical cam switch has a problem that it is difficult to change a switch operation position, there is a problem of failure of mechanical contacts, and when a large number of cam switches are provided, a mechanism is complicated and bulky. There are difficulties such as. In addition, it is troublesome to set a desired origin offset and attach it to the spindle. The present invention has been made in view of the above points, and facilitates setting and changing the execution timing of each event during a work process for each of a plurality of stations (work sections) in a glass product forming machine, It is an object of the present invention to provide a control device in which the settings are easily made.

[0008]

According to the present invention, there is provided a glass product forming machine comprising a plurality of work sections for performing a series of operations for forming a predetermined glass product, wherein a round process in each work section is sequentially shifted. , For setting the angle of the execution timing of each event during the work process for each section, and outputting a control signal based on the execution timing data of each event corresponding to the set angle according to the rotation of the rotary drive spindle. Input means for inputting execution timing of a desired event in each section by an angle from the origin of the section, and storage means for storing execution timing data of each event for each section; One angle detection means for detecting the current rotation angle of the rotation drive spindle; Offset setting means for independently setting an offset angle for setting a sequential shift amount in the one-step process in the section as an offset angle of an origin of each section with respect to a mechanical origin of the spindle, and the angle detecting means. The current rotation angle detected in step is shifted by the offset angle set by the offset setting means for each section, and the execution timing data of the event for each section is read from the storage means in accordance with the shifted current rotation angle data. And output means for outputting a control signal.

[0009] In correspondence with the embodiment described later, the work section corresponds to the stations # 1 to #n, the input means corresponds to the program means in the program switch devices PS1 to PSn, and the storage means includes: The angle detecting means corresponds to the on / off signal memories 9 and 10 in the program switch devices PS1 to PSn.
The offset setting means corresponds to the sensor unit 1 for detecting the rotation angle position of S.
And the output means corresponds to a circuit for reading out each of the memories 9 and 10 in accordance with the output of the adder 3.

[0010]

The glass product forming machine has a plurality of work sections for performing a series of operations for forming a predetermined glass product, and the round process in each work section is sequentially shifted. In the present invention, offset setting means for independently setting the offset angle for setting the sequential shift amount of the cycle in each section as the offset angle of the origin of each section with respect to the mechanical origin of the spindle. Is provided. On the other hand, the execution timing of the desired event for each section can be arbitrarily set and input by the input means, and this can be stored in the storage means. Then, the current rotation angle of the spindle is shifted by the offset angle set for each section, and the execution timing data of the event for each section is read out from the storage means in accordance with the shifted current rotation angle data, and a control signal is output. Therefore, a desired offset setting for each section can be easily and arbitrarily performed by calculation.
Accordingly, in the glassware forming process, the setting and changing of the execution timing of each event during the work process for each section can be easily performed in a programmable manner, and the offset setting for each section with respect to the main axis can be easily performed. In the glassware molding machine, the round process in each work section is sequentially shifted, and by combining each work in their shifted relationship, a series of work is smoothly performed by a combination of a plurality of work sections, One glass product can be formed.
According to the present invention, a work program corresponding to such a shifted work relationship for each work section can be realized by using only one angle detection unit corresponding to the main shaft, and the work program for each work section can be realized. The event program in the one round process can be performed very easily. For example, even if only one angle detecting means corresponding to the main spindle can be used, the event program for each work section must be programmed in accordance with the main spindle rotation angle. Therefore, it is not possible to easily program an event program for each work section within one round of the process, which is extremely troublesome. However, according to the present invention, there is provided an offset setting means for independently setting an offset angle for setting the sequential shift amount of the cycle in each section as an offset angle of the origin of each section with respect to the mechanical origin of the spindle. With the provision, the event program for each work section can be easily programmed in the one round process, and an excellent effect that the work program can be performed very easily is achieved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 and 2 are block diagrams showing an embodiment of the control device according to the present invention, in which the whole block diagram is completed by connecting the right side of FIG. 2 to the left side of FIG. In FIG. 1, a sensor unit 1
The data conversion circuit 2 corresponds to a position detecting means for detecting the rotational position of the spindle MS. The sensor unit 1 is attached to the main shaft MS and generates an output signal according to the rotation of the main shaft MS. The data conversion circuit 2 receives the output signal of the sensor unit 1 and outputs digital data Dθ indicating the rotational position of the spindle MS. This digital rotation position data D
θ indicates the absolute rotation position (rotation angle θ) within one rotation of the spindle MS.

Programmable switch devices PS1 to PSn are provided corresponding to the respective work sections (hereinafter referred to as stations) # 1 to #n. FIG. 2 shows an example of the internal configuration of only the programmable switch device PS1 corresponding to the station # 1, but the programmable switch device PS corresponding to the other stations # 2 to #n.
2 to PSn may have the same configuration as PS1. The rotational position data Dθ of the spindle MS output from the data conversion circuit 2 in FIG.
To PSn.

Representatively, the programmable switch device PS1 of station # 1 will be described. Rotational position data Dθ is input to an origin offset adder 3,
The origin offset data ± θ01 given from the origin offset setting unit 4 is added or subtracted. The origin offset process is a process for setting how much the origin of the cam switch of the station # 1 (that is, the origin of the virtual cam shaft) is offset from the origin of the spindle MS. By adding or subtracting the origin offset data ± θ01 indicating the desired origin offset to or from the rotation position data Dθ indicating the current position of the spindle MS, the rotation position data corresponding to the origin offset of the cam switch of this station # 1. Dθ1 (where Dθ1 = Dθ ± θ01) can be obtained. The origin offset setting device 4 is separately provided for each of the stations # 1 to #n. Therefore, in each of the programmable switch devices PS1 to PSn corresponding to each of the stations # 1 to #n, the origin offset processing having different contents can be performed. In other words, the origin positions of the spindles MS for the stations # 1 to #n can be apparently offset from each other. This means that even if the on / off signal generation programs having the same contents are used in different stations, the timing of the on / off signals generated from each station is shifted in phase according to the difference in the origin offset amount. I do. Therefore, providing the independent origin offset setting device 4 for each of the stations # 1 to #n is achieved by using the common sensor unit 1
This is advantageous because the origin can be adjusted individually as if separate sensor units were combined and attached to the spindle MS.

Although not shown in detail, a display is provided which can visually display the rotational position data Dθ before the origin offset and the rotational position data Dθ1 after the origin offset as necessary. A desired origin offset can be set while checking the contents of the rotational position data Dθ1 during the offset adjustment. The origin offset setting device 4 includes a numerical data setting device and the like.

The speed calculation circuit 5 is provided with the rotational position data Dθ1
Is input, and the moving speed V of the spindle MS is calculated from the change in the rotational position data Dθ1 per unit time. The obtained speed data V is input to the advance calculation circuit 6. Further, the speed data V may be output to the outside and used to perform control for synchronizing the speed of the conveyor CVY (FIG. 3) or the like with the speed of the spindle MS. The lead angle calculation circuit 6 generates lead angle data d corresponding to the speed, and includes, for example, a table storing lead angle data d for each speed. The advance data d generated in accordance with the speed data V is input to the adder 7 and added to the rotational position data Dθ1 provided from the adder 3.

The rotational position data D output from the adder 3
θ1 and the advanced-position-controlled rotational position data Dθ1 ′ output from the adder 7 are input to the on / off signal memories 9, 10 and the start / stop timing memory 11 via the switches 8a, 8b, 8c. Switches 8a, 8
b and 8c are for selecting the advance angle control, and the presence or absence of the advance angle control can be independently selected for each of the switches 8a, 8b and 8c. In the case shown in the figure, the switch 8a selects the rotational position data Dθ1 having no advance angle and inputs it to the on / off signal memory 9, and the switch 8b selects the rotational position data Dθ1 ′ having the advance angle and stores the on / off signal memory. 10 and the switch 8c sets the rotational position data D.theta.
Select 1 'to start / stop timing memory 1
Enter 1 When each of the switches 8a, 8b and 8c is switched to the position opposite to the position shown in the figure, the switch 8a selects the rotation position data Dθ1 ′ having an advance angle and inputs it to the on / off signal memory 9, and the switch 8b switches the advance angle The non-rotating position data Dθ1 is selected and input to the on / off signal memory 10, and the switch 8c selects the non-advancing rotational position data Dθ1 to input to the start / stop timing memory 11. The on / off signal memory 9 stores on / off signals S1, 1.1, S corresponding to a plurality of cam switches.
1.1.2 to S1.1n are generated in parallel according to the rotational position data Dθ1 or Dθ1 ′ given via the switch 8a. The plurality of on / off signals S1.1 / 1, S1.1-2 to S1.1n are arbitrarily set so as to be switched on or off at an arbitrary rotation angle position by program means not shown. Settings are entered,
It is a memorized one.

Similarly, the on / off signal memory 10 also includes on / off signals S1, 2, 1, 1 corresponding to a plurality of cam switches.
S1.2.2 to S1.2n are generated in parallel in accordance with the rotational position data Dθ1 or Dθ1 ′ given via the switch 8b. These plurality of on / off signals S1.2.1, S1.2-2 to S1.2n are also arbitrary so as to be switched on or off at an arbitrary rotation angle position by program means not shown. Is input and stored.

Start / stop timing memory 11
A start timing signal S1STA corresponding to a switch operation start timing within one rotation and a stop timing signal S1STP corresponding to a switch operation end timing within one rotation are determined according to rotation position data Dθ1 or Dθ1 ′ given via a switch 8c. Are generated in parallel. These start timing signal S1STA and stop timing signal S1ST
P is also arbitrarily set and stored so as to be switched to “1” or “0” at an arbitrary rotation angle position by program means not shown.

Each of the memories 9, 10, and 11 stores not only a cam switch on / off output program within one rotation but also a plurality of programs 1 to N over multiple rotations. A possible cam switch on / off output is provided.
That is, the plurality of programs 1 to N in the memories 9, 10, and 11 correspond to the number of rotations of the spindle MS from the first rotation to the Nth rotation, for example, and the cam switch is turned on according to the number of rotations at that time. / Off output program (1 to
N) is selected by the output of the program selection operation circuit 12, and the on / off signals S1.1 / 1, S1.1-2 to S1.1n, S1.2-1 in the selected program are selected. ,
S1.2-2 to S1.2n, start timing signal S1
The STA and the stop timing signal S1STP are read in parallel according to the rotational position data Dθ1 or Dθ1 ′, respectively.

The on / off signals S1.1.1, S1.1.2 to S1.
1 · n and S1 · 2 · 1 and S1 · 2 · 2−S1 · 2 · n are output-controlled by AND gates 13 and 14, respectively. AND gates 13 and 14 are controlled by the output of flip-flop 15. Start timing signal S1S read from start / stop timing memory 11
TA is supplied to the flip-flop 15 via the AND gate 16.
Of the stop timing signal S1
STP is connected to flip-flop 1 via AND gate 17.
5 reset input. The other input of the AND gate 16 includes a start interlock signal S1I output from the start interlock memory 18 (FIG. 1).
L1 is supplied, and the other input of the AND gate 17 is supplied with the stop interlock signal S1IL2 output from the stop interlock memory 19 (FIG. 1).

In FIG. 1, the start interlock memory 18 stores data for setting the relationship between the start timings of the switch operations between the stations as a function of position or time, and stores this data as position data Dθ or time data. The start interlock signals S1IL1 to SnIL1 for each station are read out in accordance with the time t. The stop interlock memory 19 stores data for setting the relation of the end timing of the switch operation between the stations as a function of position or time, and reads out this data according to the position data Dθ or time data t. It outputs stop interlock signals S1IL2 to SnIL2 for each station.

The start interlock signals S1IL1 to S1
For example, nIL1 is a signal that rises to a signal “1” at a switch operation start timing, and then maintains the signal “1”. Also, the stop interlock signal S1IL2
〜SnIL2 is a signal that rises to a signal “1” at the end of the switch operation and thereafter keeps “1”. The start interlock signals S1IL1 to Sn
IL1 and stop interlock signal S1IL2-S
The switch operation start timing and the end timing designated by nIL2 are absolute timings in the entire process of the operation, whereas the above-described start timing signal S1STA and stop timing signal S1S
TP is a relative start timing and end timing in one rotation.

The start interlock signals S1IL1 to S1IL1
SnIL1 and stop interlock signal S1IL2
SnIL2 is a signal based on, for example, the start timing or the end timing of the station # 1, and the start timing or the end timing of the other stations # 2 to #n from the start timing or the end timing of the station # 1. Each signal is programmed according to the desired shift. The contents of these start interlock signals S1IL1 to SnIL1 and stop interlock signals S1IL2 to SnIL2 can also be arbitrarily programmed.

The start interlock memory 18 and the stop interlock memory 19 store a start interlock signal S1IL1 or a stop interlock signal S1I corresponding to the station # 1 in response to a trigger input.
L2 is read, and thereafter, the start interlock signals S2IL1 to SnIL1 or the stop interlock signals S2IL2 to SnIL2 of the other stations # 2 to #n are read in accordance with the change of the rotational position or the lapse of time. These start interlock signals S depending on the rotational position
When reading out the 2IL1 to SnIL1 or the stop interlock signal S2IL2 to SnIL2, the rotational position data Dθ is given to the address input of the memories 18 and 19. When reading out these start interlock signals S2IL1 to SnIL1 or stop interlock signals S2IL2 to SnIL2 as time elapses, time data t is applied to the address inputs of the memories 18 and 19.

The trigger signals to the memories 18 and 19 may be formed by an appropriate method as needed. In the embodiment, limit switches 20, 21 such as photoelectric switches provided outside are provided.
Into the trigger signal forming circuit, and
Electronic switches 23 and 24 controlled by the output of No. 2 are inserted in the trigger signal forming circuit. The limit switches 20 and 21 are turned on when an external condition for starting or ending the switch operation of the entire switch system is satisfied. The electronic switches 23 and 24 are turned on when the number of rotations of the spindle MS reaches the number of start rotations or the number of stop rotations set by the start / stop rotation number setting unit 25, respectively. The start / stop rotation number setting device 25 sets the timing of starting the switch operation of the entire switch system by the number of rotations (start rotation number) of the main shaft MS and the timing of ending, in response to a request in production management. It is set by the number of rotations (stop rotations) of the spindle MS. That is, the number of rotations of the spindle MS at the start of production is set as the number of start rotations, and the number of rotations of the spindle MS at the end of production is set as the number of stop rotations. Can be managed as corresponding to the total number of productions. In addition, for example, the limit switch 20 is turned on when the material is placed at a predetermined starting position, which is a safety condition for generating a start trigger. Further, for example, the limit switch 21 is turned on when the product is placed at a predetermined end place, which is a safety condition for generating a stop trigger. The trigger signal generating means for the memories 18 and 19 includes the limit switches 20 and 2 described above.
Not limited to the combination of 1 and the electronic switches 23 and 24, appropriate means may be used as needed. The trigger signal generation condition setting means such as the limit switches 20 and 21 and the electronic switches 23 and 24 may be provided for each station, and in that case, the circuit configuration becomes more complicated than the illustrated configuration.

The number of rotations of the spindle MS is determined by the rotation position data D
It is counted by the rotation number counter 26 based on θ. Since the rotation position data Dθ indicates the absolute rotation position within one rotation, the rotation position data Dθ
Is counted as one rotation while the value changes from the minimum value to the maximum value, and thus the number of rotations of the spindle MS from the origin is counted. The rotation count data obtained by the counter 26 is input to the comparison operation circuit 22 and compared with the start rotation count and the stop rotation count set by the start / stop rotation count setting device 25. Spindle M counted
When the number of rotations of S reaches the set number of start rotations, a signal for turning on the electronic switch 23 is given to the switch 23. When the number of rotations of the spindle MS reaches the number of stop rotations, a signal for turning on the electronic switch 24 is given. The switch 24
Give to.

When the trigger signal generation condition is satisfied by the switches 20 and 23, a trigger signal is supplied to the start interlock memory 18 and the station #
The start interlock signal S1IL1 corresponding to 1 is read. Thereafter, the start interlock signals S2IL1 to SnIL1 of the other stations # 2 to #n are read in accordance with the change in the rotational position or the passage of time. As described above, the start interlock signal S1IL1 of the station # 1 is input to the AND gate 16 (FIG. 2) in the programmable switch device PS1 corresponding to the station # 1. The start interlock signals S2IL1 to SnIL1 of the other stations # 2 to #n are output from the corresponding programmable switch devices PS2 to P2P.
Each is input to the similar AND gate 16 in Sn.

Referring to FIG. 2, the AND gate 16 comprises:
This is enabled by the start interlock signal S1IL1 being "1", and the start timing signal S1
When 1 STA is read, "1" is output. The flip-flop 15 is set by the output signal "1" of the AND gate 16. The AND gates 13 and 14 are enabled by the set output “1” of the flip-flop 15, and the on / off signal S read from the memories 9 and 10 is output.
1.1.1.1, S1.1.1.2 to S1.1n, S1.2.1.S1
・ 2.2 to S1.2n are programmable switch devices PS
1 is output.

On the other hand, in FIG.
When the trigger signal generation condition is satisfied, a trigger signal is given to the stop interlock memory 19, and the stop interlock signal S corresponding to the station # 1 is sent.
1IL2 is read. Thereafter, the stop interlock signals S2IL2 to SnIL2 of the other stations # 2 to #n are read according to the change in the rotational position or the lapse of time. As described above, the stop interlock signal S1IL2 of the station # 1 is input to the AND gate 17 (FIG. 2) in the programmable switch device PS1 corresponding to the station # 1. Other station # 2
#N stop interlock signal S2IL2 to SnI
L2 is input to similar AND gates 17 in the corresponding programmable switch devices PS2 to PSn.

The AND gate 17 is enabled by "1" of the stop interlock signal S1IL2, and outputs "1" when the stop timing signal S1STP is read from the memory 11. The flip-flop 15 is reset by the output signal “1” of the AND gate 17. The set output of the flip-flop 15 becomes “0”, the AND gates 13 and 14 are closed, and the memories 9 and
10 on / off signals S1.1.1, S1
・ 1.2 ・ S1 ・ 1 ・ n, S1 ・ 2 ・ 1, S1 ・ 2.2 ・ S1 ・
The output of 2.n is prohibited.

Thus, the ON / OFF signals S1.1 / 1, S1.1-2 to S1 between the start and end timings set in the start / stop interlock memories 18 and 19 corresponding to the station # 1.・ 1 ・ n 、 S1 ・ 2 ・
1, S1.2.2-2 to S1.2n are output. Note that 27
Is a monostable multivibrator, and an on / off signal S
A trigger pulse S1P having a predetermined time width is generated in synchronization with the rising of 1.1.1. The triggering cam switch output pulse S1P is used as needed.
On / off signals S1.1 / 1, S1.1-2 to S1.1n, S1 output from programmable switch device PS1
· 2 · 1, S1 · 2 · 2 · S1 · 2 · n and the pulse S1P are
Each of the actuators A1 to An and B of the station # 1 is given to a corresponding one of them, and is used as an on / off operation control signal. The series of the output on / off signals S1.1 / 1, S1.1-2 to S1.1n of one memory 9 and the output on / off signals S1.2 / 1 of the other memory 10 are shown.
The conditions of the series of 1, S1, 2.2 to S1, 2, n can be independently set by switches 8a and 8b with respect to the presence or absence of the advance angle. Therefore, each of the actuators A1 to An,
In the control of B, the control can be performed by dividing the system into two systems depending on whether the advance angle control is performed or not. That is, the advance angle control is performed for all of the actuators A1 to An and B, or the actuators A1 to An and
Control such as not performing the advance control for all of B, or performing the advance control only for one of the series corresponding to the memory 9 or the series corresponding to the memory 10 among the actuators A1 to An and B. Is possible.

In FIG. 1, the number-of-revolutions count data obtained by the number-of-revolutions counter 26 is input to the program selection operation circuit 12. The program selection operation circuit 12 generates data designating selection of one of the cam switch on / off output programs 1 to N according to the number of rotations. For example, it is specified to select each of the programs 1 to N corresponding to each number of rotations of the spindle MS from the first rotation to the Nth rotation. Thereby, each of the on / off signals S1.1.1.1, S1.1.1.2-S1.1n,
The generation patterns of S1.2 / 1, S1.2-2 to S1.2n can be made different depending on the number of rotations of the spindle MS,
A multi-turn cam switch function can be realized. It should be noted that the programs 1 to N may be switched not only for each rotation but also for a plurality of rotations.

For example, the actuators C and D in FIG. 3 need only be operated each time the spindle MS makes a plurality of predetermined rotations. In such a case, the above-described multi-rotation cam switch function is effective. is there.

FIG. 4 shows a modified example of the origin offset setting unit 4 in FIG. In this example, a data change delay circuit 28 is provided between the origin offset setting device 4 and the adder 3. The data change delay circuit 28
Origin offset data ± θ at origin offset setting unit 4
When the setting content of 01 changes, this change is not transmitted to the adder 3 immediately, but is transmitted while being gradually changed. That is, as shown in FIG. 5, when the origin offset data set by the origin offset setting device 4 at time t1 changes from θ01 (i) to θ01 (i + 1), the data θ01 (i) before the change is changed. The data θ01 (i + 1) after the change is gradually changed by a function θ (t) of an appropriate time. During the operation of the machine, the setting of the origin offset setting device 4 may be changed to adjust the origin offset amount. In such a case, it is dangerous if the output of the on / off signal suddenly changes due to the change of the origin offset amount and the actuator suddenly operates. In order to prevent such a danger, as shown in the example of FIG. 4, when the set content of the origin offset data ± θ01 in the origin offset setter 4 changes, the change is not immediately transmitted to the adder 3. Then, it is good to transmit while changing gradually.

FIG. 6 shows a modification of the adder 3 in FIG. In the example shown in FIG. 6A, the multiplier 29 outputs the rotational position data Dθ before it is input to the adder 3.
Is multiplied by α at a ratio corresponding to the coefficient α, and the origin offset data ± θ01 is added to the α-multiplied rotation position data αDθ. The number of bits of the data αDθ is assumed to be the same as that of the data Dθ. Therefore, when the value of the data αDθ exceeds the maximum value M (the value for one rotation) of the data Dθ, the value of the data αDθ becomes n × It is assumed that the value is obtained by subtracting M (where n is an integer of 1 or more). That is, the data αD
is assumed to be the same modulo M data as the data Dθ. This means that the rotational position data obtained when the rotational position of the output shaft is detected via a gear having a transmission ratio of 1: α with respect to the main shaft MS is equivalent to the data αDθ. By reading the ON / OFF signals of the memories 9, 10, and 11 based on the rotation position data αDθ multiplied by α in this manner, the rotation of the station axis (virtual cam axis) by α rotation per one rotation of the spindle MS can be achieved. The switch on / off signal can be read. Multiplier 29
Can be arbitrarily set, so that the transmission ratio of the station axis to the main axis MS is set to 1: α without changing the contents of the memories 9, 10, and 11.
Can be dealt with. Note that α may be an integer or a fraction. The arrangement of the multiplier 29 is as shown in FIG.
Output side. 6A and 6B, the origin offset data ± θ input to the adder 3
01 may or may not be via the data change delay circuit 28 as shown in FIG.

The data programmed in each of the memories 9, 10, 11, 18, and 19 by program means (not shown) may be transferred to and stored in an appropriate external memory and backed up. In that case, an IC card or the like may be used as the external memory.

If a phase shift type absolute rotational position detecting device as disclosed in Japanese Patent Application Laid-Open No. 57-70406 is used as the rotational position detecting means comprising the sensor section 1 and the data conversion circuit 2, high accuracy can be obtained. This is convenient because position detection can be performed. In that case, the sensor unit 1 includes a stator in which a primary coil and a secondary coil are wound around a plurality of poles, respectively, and a rotor having a predetermined (eg, eccentric) shape made of a magnetic material or a conductor. The data conversion circuit 2 supplies a plurality of AC signals having phases shifted from each other to each primary coil of the sensor, and outputs a secondary coil output signal from a reference AC signal. It consists of a circuit for measuring the phase shift. However, it is also possible to use an incremental encoder as the sensor unit 1 and a circuit for counting incremental pulses to obtain position data as the data conversion circuit 2.

Each programmable switch device PS
As 1 to PSn, signals of "1" and "0" corresponding to ON / OFF are stored in a memory using a rotational position as an address, as disclosed in Japanese Patent Application Laid-Open No. 58-222306, Is read out according to the rotational position data. Also, the switch-on set position data and the switch-off set position data are stored in a memory, and these are compared with the rotational position data, and “1” and “0” corresponding to on / off are compared according to the comparison result. "
May be formed and output. Further, the position detecting means is not limited to a means for detecting the rotation of the main shaft, but may be a means for detecting a linear displacement of a linear moving body which moves linearly according to the rotation of the main shaft.

[0039]

As described above, according to the present invention, the execution timing of a desired event for each section is input as data by the input means, and this is stored in the storage means. The offset angle of the origin of the section with respect to the mechanical origin of each spindle can be set by offset setting means,
Then, the current rotation angle of the main shaft is shifted by the offset angle set for each section, and the execution timing data of the event for each section is read from the storage means in accordance with the shifted current rotation angle data, and a control signal is output. With this configuration, a desired offset setting for each section can be easily and arbitrarily performed by calculation. Therefore, in the glassware molding process, the setting and change of the execution timing of each event during the work process for each section can be easily performed in a programmable manner.
In addition, an excellent effect such as easy setting of the offset for each section with respect to the spindle is provided. In other words, a work program corresponding to the shifted work relationship for each work section can be realized using only one angle detection means corresponding to the main shaft, and an event program in a round process for each work section can be realized. It has an excellent effect that it can be performed extremely easily. For example, even if only one angle detecting means corresponding to the main spindle can be used, the event program for each work section must be programmed in accordance with the main spindle rotation angle. Therefore, it is not possible to easily program an event program for each work section within the round process,
It is extremely troublesome. However, according to the present invention, there is provided an offset setting means for independently setting an offset angle for setting the sequential shift amount of the cycle in each section as an offset angle of the origin of each section with respect to the mechanical origin of the spindle. With the provision, the event program for each work section can be easily programmed in the one round process, and an excellent effect that the work program can be performed very easily is achieved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a left half of a block diagram according to an embodiment of a control device according to the present invention.

FIG. 2 is a diagram showing the right half of the block diagram of the embodiment.

FIG. 3 is a production line layout diagram schematically showing an example of a glass product forming machine system to which the present invention is applied.

FIG. 4 is a block diagram showing a modification of a portion related to an origin offset setting device in FIG. 2;

FIG. 5 is a graph showing an operation example of the data change delay circuit in FIG. 4;

FIG. 6 is a block diagram showing a modified example of a portion related to a rotational position data change adder in FIG. 2;

[Explanation of symbols]

 # 1 to #n station (work section) 1 Sensor unit for detecting the rotation angle of the rotation drive spindle 2 Data conversion circuit attached to the sensor unit 3 Adder for origin offset 4 Origin offset setter 9, 10 ON / OFF Signal memory PS1 to PSn Programmable switch device 11 Start / stop timing memory 18 Start interlock memory 19 Stop interlock memory

Claims (1)

(57) [Claims] 1. A plurality comprising a working section which performs a series of operations for forming a predetermined glass product, each work section
In the glassware forming machine in which the round process in the application is sequentially shifted, the execution timing of each event in the work process for each section is set at an angle, and according to the rotation of the rotary drive spindle, the angle is set in accordance with the set angle. A control device for outputting a control signal based on execution timing data of each event, comprising: an input unit for inputting data of an execution timing of a desired event in each section by an angle from an origin of the section; Storage means for storing execution timing data of each event; and 1 for detecting a current rotation angle of the rotation drive spindle.
And One of the angle detection means, set the sequential shift of the round step in each section
The offset angle for constant, respectively as the offset angle of the origin of each said sections with respect to the mechanical origin of the spindle s
Offset setting means for independently setting, the current rotation angle detected by the angle detection means is shifted by the offset angle set by the offset setting means for each section, respectively, according to the shifted current rotation angle data Output means for reading out the execution timing data of the event for each section from the storage means and outputting a control signal, wherein the control means for a glass product forming machine is provided.