JPH0748130A - Controlling apparatus for glass article forming machine - Google Patents

Abstract

PURPOSE:To facilitate the setting and change of the performing timing of each event and facilitate the setting of offset in the working process of each of plural working sections of a glass article forming machine. CONSTITUTION:This controlling apparatus is provided with an inputting means to input the data on the performing timing of desired event in each section by the angle of the section from the original point, a memory means to store the performing timing data of each event for each section, an angle detection means to detect the present rotation angle of a driving main shaft and an offset setting means (adder 3 and a setter 4) for setting the offset angle of the original point of a section based on the mechanical original point of the main shaft for each section. The present rotational angle of the main shaft detected by the angle detection means is staggered by offset angles set for each section, the performing timing data of the event for each section is read out from the memory means according to the staggered present rotational angle data and a control signal is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a glass product molding machine, and more particularly to a rotary drive main shaft having a plurality of work stations, that is, electronic cam switches for each section, to output a control signal. Regarding 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 on each line are synchronized and sent to a common line, and a plurality of products sent to the common line are palletized. The system exists.
An example of such a mass production system is shown in a layout as shown in FIG. What is indicated by # 1 to #n is
An individual production line or section, each such production line or section being referred to herein as a station. That is, each station # 1 to #n
Is an automated production line or section that automatically produces products individually. The arrow X indicates the transport direction of the semi-finished product at the station. Each station # 1
A plurality of actuators or robots (hereinafter collectively referred to as actuators) A1 to An for automatic work are provided in predetermined routes on the paths of the transport lines #n to #n, respectively.

At the end of each of the stations # 1 to #n, a transfer actuator B for sending the product to the conveyor CVY is provided. Arrow Y indicates conveyor CVY
The conveyance direction of the above product is shown. An actuator C for checking product quality or for other purposes is provided at the end of the conveyor CVY as required. A palletizing device PLT is provided at the end of the conveyor CVY. The palletizing device PLT operates according to the operation of the actuator D, and stores the products conveyed by the conveyor CVY on the pallet P in an array.

A master device for distributing and supplying materials, parts, etc. to each of the stations # 1 to #n is provided. This master device has a spindle MS driven by a motor or the like (not shown). In accordance with the rotation of the spindle MS, materials or parts are distributed / supplied to the stations # 1 to #n. 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 movement of the master device. Further, the transport operation of the semi-finished products in each of the stations # 1 to #n is also controlled in association with the rotation of the spindle MS. For example, the transport operation of the semi-finished product at each of the stations # 1 to #n may be performed mechanically in association with the rotation of the spindle MS, or depending on the rotation position detection data of the spindle MS. The transport operation of the semi-finished product in each of the stations # 1 to #n may be controlled to perform the transport operation in synchronization with the rotation of the spindle MS. The conveyor CVY may be driven by controlling the speed independently,
It may be controlled in conjunction with the rotation of the spindle MS. In addition, the actuators A1 to An, B, C, D
As such, a solenoid, a cylinder, a motor, an injector, a blower or the like depending on the work purpose of each step is used.

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

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

[0007]

By the way, in the mechanical type cam switch, it is difficult to change the switch operating position, there is a problem of mechanical contact failure, and when many are provided, the mechanism is complicated and bulky, There are some difficulties. Further, 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 of execution timing of each event in a work process for each of a plurality of stations (work sections) in a glass product molding machine, and an offset. It is intended to provide a control device whose setting is easy.

[0008]

SUMMARY OF THE INVENTION The present invention is a glass product molding machine having a plurality of work sections for performing a series of work for molding a predetermined glass product, and in each of the sections, each event of each event in the work process is performed. A control device for setting an execution timing as an angle 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 rotation driving spindle, and a desired event in each section. Input means for inputting the execution timing of data by the angle from the origin of the section, storage means for storing the execution timing data of each event for each section, and for detecting the current rotation angle of the rotation drive spindle. The angle detection means and, for each section, the origin of the section relative to the mechanical origin of the spindle. Offset setting means for setting a set angle, and the current rotation angle detected by the angle detection means are respectively shifted by the offset angle set by the offset setting means for each section, and according to the shifted current rotation angle data. And output means for reading out the execution timing data of the event for each section from the storage means and outputting the control signal.

In correspondence with the embodiments described later, the working sections correspond to stations # 1 to #n, the input means corresponds to the program means in the program switch devices PS1 to PSn, and the storage means is Corresponding to the on / off signal memories 9 and 10 in the program switch devices PS1 to PSn, the angle detecting means is the spindle M.
Corresponding to the sensor unit 1 for detecting the rotational angle position of S, the offset setting means is the origin offset setting unit 4
The output means corresponds to a circuit for reading out the memories 9 and 10 according to the output of the adder 3.

[0010]

The desired event execution timing for each section can be arbitrarily set and input by the input means and stored in the storage means. Further, the offset angle of the origin of the section with respect to the mechanical origin of the spindle for each section can be set by the offset setting means. Then, the current rotation angle of the main spindle 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 according to the shifted current rotation angle data and a control signal is output. Since this is done, it is possible to easily and arbitrarily set the desired offset setting for each section. Therefore, in the glass product forming process, the execution timing of each event in the working process for each section can be easily set and changed in a programmable manner, and the offset setting for each section with respect to the main axis becomes easy.

[0011]

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

Programmable switch devices PS1 to PSn are provided corresponding to the respective work sections (hereinafter referred to as stations) # 1 to #n. In FIG. 2, an example of the internal configuration of only the programmable switch device PS1 corresponding to the station # 1 is shown, but the programmable switch device PS corresponding to the other stations # 2 to #n is shown.
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 of FIG. 1 is the programmable switch device PS1 of FIG.
~ Is input to PSn.

The programmable switch unit PS1 of the station # 1 will be typically described. The rotational position data Dθ is input to the adder 3 for origin offset,
The origin offset data ± θ01 given from the origin offset setter 4 is added or subtracted. The origin offset process is a process of setting how much the origin of the cam switch of the station # 1 (that is, the origin of the virtual cam axis) is offset from the origin of the spindle MS. By adding or subtracting the origin offset data ± θ01 indicating the desired origin offset to 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 provided separately for each of the stations # 1 to #n. Therefore, the programmable switch devices PS1 to PSn corresponding to the stations # 1 to #n can perform the origin offset processing with different contents. In other words, it is possible to apparently offset the origin positions of the spindles MS with respect to the stations # 1 to #n from each other. This means that even if the same ON / OFF signal generation program is used in different stations, the timing of the ON / OFF signals generated from each station will be shifted by the phase according to the difference in the origin offset amount. To do. Therefore, providing an independent origin offset setter 4 for each of the stations # 1 to #n makes it possible to use the common sensor unit 1 while
This is advantageous because the origin can be individually adjusted as if separate sensor units are attached to the main shaft MS in a combined manner.

Although not shown in detail, the rotary position data Dθ before the origin offset and the rotary position data Dθ1 after the origin offset are provided with a display device which can be visually displayed as necessary. It is possible to set a desired origin offset while confirming 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 uses the rotational position data Dθ1.
Then, 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 angle calculation circuit 6. Alternatively, the speed data V may be output to the outside and used to control the speed of the conveyor CVY (FIG. 3) or the like to be synchronized with the speed of the spindle MS. The advance angle calculation circuit 6 generates the advance angle data d according to the speed, and includes, for example, a table storing the advance angle data d for each speed. The advance angle data d generated according to the speed data V is input to the adder 7 and added to the rotational position data Dθ1 given from the adder 3.

Rotational position data D output from the adder 3
θ1 and the rotational position data Dθ1 ′ output from the adder 7 that has undergone advance control are input to the ON / OFF signal memories 9 and 10 and the start / stop timing memory 11 via the switches 8a, 8b and 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 without advance and inputs it to the ON / OFF signal memory 9, and the switch 8b selects the rotational position data Dθ1 ′ with advance and selects the ON / OFF signal memory. Input to 10, and the switch 8c advances the rotational position data Dθ.
Select 1'and start / stop timing memory 1
Enter 1. When each of the switches 8a, 8b, 8c is switched to a position opposite to that shown in the figure, the switch 8a selects the rotational position data Dθ1 ′ having an advance angle and inputs it to the ON / OFF signal memory 9, and the switch 8b changes the advance angle. The rotation position data Dθ1 that does not exist is selected and input to the ON / OFF signal memory 10, and the rotation position data Dθ1 that has no advance angle is selected and input to the start / stop timing memory 11. The on / off signal memory 9 includes on / off signals S1.1.1, S corresponding to a plurality of cam switches.
1.1.2 to S1.1.n 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 S1.1.1n are arbitrarily switched by a program means (not shown) so as to switch to an on or off state at an arbitrary rotation angle position. The settings are entered,
It is something that is remembered.

Similarly, the on / off signal memory 10 also has on / off signals S1, 2.1, S1 corresponding to a plurality of cam switches.
S1.2.2.multidot.S1.2.multidot.n are generated in parallel according to the rotational position data D.theta.1 or D.theta.1 'given via the switch 8b. These plural on / off signals S1.2.1, S1.2.2.about.S1.2.2.n are also arbitrary so as to be switched to an on or off state at an arbitrary rotation angle position by a program means (not shown). It is set and input to and stored.

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

Each of the memories 9, 10 and 11 stores not only the cam switch ON / OFF output program within one rotation but also a plurality of programs 1 to N over multiple rotations. It is designed to produce a possible cam switch on / off output.
That is, the 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
Any one of N) is selected by the output of the program selection arithmetic circuit 12, and ON / OFF signals S1.1.1, S1.1.2 to S11.1n, S12.1n in the selected program are selected. ，
S1 ・ 2 ・ 2 to S1 ・ 2 ・ n, 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.
The output of 1 · n and S1 · 2 · 1, S1 · 2 · 2 to S1 · 2 · n is controlled by AND gates 13 and 14, respectively. The AND gates 13 and 14 are controlled by the output of the flip-flop 15. Start timing signal S1S read from start / stop timing memory 11
TA is flip-flop 15 through AND gate 16
Is applied to the set input of the stop timing signal S1
STP is flip-flop 1 via AND gate 17.
5 reset input. The start interlock signal S1I output from the start interlock memory 18 (FIG. 1) is input to the other input of the AND gate 16.
L1 is given, and the other input of the AND gate 17 is given 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 of the start timing of the switch operation between the stations as a function of position or time, and this data is used as position data Dθ or time data. The start interlock signal S1IL1 to SnIL1 for each station is read out according to t. The stop interlock memory 19 stores data for setting the relationship between the end timings of the switch operations of the stations as a function of position or time, and reads this data according to the position data Dθ or time data t, The stop interlock signals S1IL2 to SnIL2 for each station are output.

Start interlock signals S1IL1 to S
The nIL1 is, for example, a signal that rises to the signal “1” at the switch operation start timing and then maintains “1”. In addition, the stop interlock signal S1IL2
~ SnIL2 is a signal that rises to the signal "1" at the timing of ending the switch operation and then maintains "1". This start interlock signal S1IL1 to Sn
IL1 and stop interlock signal S1IL2 to S
The switch operation start timing and end timing instructed by nIL2 are absolute timings in the entire work process, whereas the start timing signal S1STA and the stop timing signal S1S described above are used.
TP is a relative start timing and end timing within one rotation.

Start interlock signal S1IL1
SnIL1 and stop interlock signal S1IL2
~ SnIL2 is, for example, a signal based on 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 offset. The contents of these start interlock signals S1IL1 to SnIL1 and stop interlock signals S1IL2 to SnIL2 can also be programmed arbitrarily.

The start interlock memory 18 and the stop interlock memory 19 have a start interlock signal S1IL1 or a stop interlock signal S1I corresponding to the station # 1 in response to a trigger input.
After reading L2, the start interlock signals S2IL1 to SnIL1 or the stop interlock signals S2IL2 to SnIL2 of the other stations # 2 to #n are read according to the change of the rotational position or the passage of time. Depending on the rotational position, these start interlock signals S
When the 2IL1 to SnIL1 or the stop interlock signals S2IL2 to SnIL2 are read, the rotational position data Dθ is given to the address inputs of the memories 18 and 19. When the start interlock signals S2IL1 to SnIL1 or the stop interlock signals S2IL2 to SnIL2 are read according to the passage of time, the time data t is given 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 technique as needed. In the embodiment, limit switches 20 and 21 such as photoelectric switches provided outside are provided.
Is inserted in the trigger signal forming circuit, and further, the comparison operation circuit 2
Electronic switches 23 and 24 controlled by the output of 2 are inserted in the trigger signal forming circuit. The limit switches 20 and 21 are respectively 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 respectively 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 device 25. The start / stop rotation number setting device 25 sets the timing for starting the switch operation of the entire switch system according to the number of rotations of the main spindle MS (start rotation number) and the timing for ending the switch operation in response to a request in production management. It is set by the number of rotations of the spindle MS (the number of stop rotations). 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 equivalent to the total amount of production. Further, for example, the limit switch 20 is turned on when the material is placed at a predetermined starting place, 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 position, which is a safety condition for generating a stop trigger. The trigger signal generating means for the memories 18 and 19 includes limit switches 20 and 2 as described above.
Not limited to the combination of 1 and the electronic switches 23 and 24, an appropriate means may be used as needed. In addition, 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. 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
The rotation number counter 26 counts based on θ. Since the rotational position data Dθ indicates the absolute rotational position within one rotation, this rotational position data Dθ
1 is counted as one rotation while 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 number count data obtained by the counter 26 is input to the comparison calculation circuit 22 and compared with the start rotation number and the stop rotation number set by the start / stop rotation number setting device 25. Counted spindle M
A signal for turning on the electronic switch 23 when the number of rotations of S reaches the set number of start rotations is given to the switch 23, and a signal for turning on the electronic switch 24 when the number of rotations of the spindle MS reaches the number of stop rotations is sent. The switch 24
Give to.

In this way, when the trigger signal generating condition is satisfied by the switches 20 and 23, the trigger signal is given 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 according to the change of 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 programmable switch devices PS2 to PS2 corresponding to them.
Inputs are made to similar AND gates 16 in Sn, respectively.

Referring to FIG. 2, the AND gate 16 is
It is enabled by the start interlock signal S1IL1 of "1", and the start timing signal S
When 1STA is read, "1" is output. The output signal "1" of the AND gate 16 sets the flip-flop 15. The set output "1" of the flip-flop 15 enables the AND gates 13 and 14, and the ON / OFF signal S read from the memories 9 and 10.
1, 1.1, S1, 1, 2 to S1, 1, n, S1, 2, 1, S1
・ 2 ・ 2 ～ S1 ・ 2 ・ n is programmable switch device PS
It is output from 1.

On the other hand, in FIG. 1, the switches 21 and 24 are
When the trigger signal generation condition is satisfied by, the trigger signal is given to the stop interlock memory 19, and the stop interlock signal S corresponding to the station # 1 is supplied.
1IL2 is read. Thereafter, the stop interlock signals S2IL2 to SnIL2 of the other stations # 2 to #n are read according to the change of the rotational position or the passage 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 stations # 2
#N stop interlock signals S2IL2 to SnI
L2 is input to the same AND gates 17 in the programmable switch devices PS2 to PSn corresponding to them.

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 output signal “1” of the AND gate 17 resets the flip-flop 15. The set output of the flip-flop 15 becomes "0", the AND gates 13 and 14 are closed, and the memory 9 and
ON / OFF signals S1.1.1, S1 read from 10
・ 1.2 to S1 ・ 1 ・ n, S1 ・ 2 ・ 1, S1 ・ 2 ・ 2 to S1 ・
2 · n output is prohibited.

Thus, the on / off signals S1.1.1, S1.1.2 ... S1 are set 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 to S1 · 2 · n are output. 27
Is a monostable multivibrator and has an on / off signal S
The 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 S1.1.n, S1 output from the programmable switch device PS1
・ 2.1 ・ S1 ・ 2 ・ 2 to S1 ・ 2 ・ n and pulse S1P are
Each of the actuators A1 to An, B of the station # 1 is given to the corresponding one and used as an ON / OFF operation control signal. The series of the output on / off signals S1.1.1, S1.1.2 to S1.1.n of one memory 9 and the output on / off signals S1.2.
With respect to the sequence of S1, S2, S2, S2, S2, S2, Sn, S1, S2, S2 and Sn, the condition can be set independently by the switches 8a and 8b regarding the presence or absence of the advance angle. Therefore, each actuator A1 to An,
In the control of B, it is possible to control in two series depending on whether the advance angle control is performed or not. That is, the advance angle control is performed for all the actuators A1 to An, B, or the actuators A1 to An,
Control such that advance angle control is not performed for all B, or advance angle control is performed for only one of the series corresponding to the memory 9 or the series corresponding to the memory 10 among the actuators A1 to An, B. Is possible.

By the way, in FIG. 1, the rotation number count data obtained by the rotation number counter 26 is inputted to the program selection arithmetic circuit 12. The program selection arithmetic 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 that the programs 1 to N are respectively selected corresponding to the number of rotations of the spindle MS from the first rotation to the Nth rotation. As a result, each of the on / off signals S1.1.1, S1.1.2 to S1.1.1n,
It is possible to make the generation patterns of S1.2.1 and S1.2.2 to S1.2.2n different according to the number of rotations of the spindle MS,
A multi-rotation 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 each rotation.

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

FIG. 4 shows a modification of the origin offset setting unit 4 in FIG. In this example, a data change delay circuit 28 is provided between the origin offset setter 4 and the adder 3. The data change delay circuit 28 is
Origin offset data in the origin offset setter 4 ± θ
When the setting content of 01 changes, the change is not immediately transmitted to the adder 3, but is gradually changed and transmitted. That is, as shown in FIG. 5, when the origin offset data set by the origin offset setter 4 changes from θ01 (i) to θ01 (i + 1) at time t1, the data before the change θ01 (i) The data θ01 (i + 1) after the change is gradually changed by the function θ (t) of an appropriate time. The origin offset setter 4 may be changed during the operation of the machine to adjust the origin offset amount. In such a case, it is dangerous that 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, when the setting contents of the origin offset data ± θ01 in the origin offset setter 4 changes, as in the example of FIG. 4, this change is not immediately transmitted to the adder 3. In addition, it is good to transmit while gradually changing.

FIG. 6 shows a modification of the part of the adder 3 in FIG. In the example shown in FIG. 6A, the multiplier 29 is input before the rotational position data Dθ is input to the adder 3.
In step 1, the coefficient α is multiplied by α, and the origin offset data ± θ01 is added to the rotational position data αDθ multiplied by α. Note that the number of bits of the data αDθ is the same as that of the data Dθ. Therefore, when the value of the data αDθ exceeds the maximum value M of the data Dθ (value for one rotation), the value of the data αDθ is n ×. A value obtained by subtracting M (where n is an integer of 1 or more) is assumed. That is, the data αD
It is assumed that θ is the data with the same modulo M as the data Dθ. This means that the rotational position data obtained when the rotational position of the output shaft is detected via the 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 rotational position data αDθ multiplied by α in this way, in the case where the axis of the station (virtual cam axis) makes α rotations per revolution of the main shaft MS. The switch on / off signal can be read. Multiplier 29
The value of the coefficient α to be input to can be arbitrarily set, so that the transmission ratio of the station axis to the main axis MS is 1: α without changing the contents of the memories 9, 10, and 11.
Can be dealt with when changing to. Note that α may be an integer or a fraction. The arrangement of the multiplier 29 is as shown in FIG.
May be the output side. In the case of FIGS. 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 a program means (not shown) may be transferred and stored in an appropriate external memory for backup. 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 Laid-Open No. 57-70406 is used as the rotational position detecting means composed of the sensor section 1 and the data conversion circuit 2, the accuracy is high. This is convenient because the position can be detected. In that case, the sensor unit 1 includes a stator in which a primary coil and a secondary coil are respectively wound around a plurality of pole portions, and a rotor having a predetermined (eg, eccentric) shape formed of a magnetic material or a conductor. The data conversion circuit 2 supplies a plurality of AC signals, which are out of phase with each other, to the respective primary coils of the sensor, and outputs the secondary coil output signal from the reference AC signal. It is composed of a circuit for measuring the phase shift. However, it is also possible to use an incremental encoder as the sensor unit 1 and use a circuit for counting the incremental pulses and obtaining position data as the data conversion circuit 2.

Further, each programmable switch device PS
As 1 to PSn, as shown in JP-A-58-222306, "1" and "0" signals corresponding to ON / OFF using the rotational position as an address are stored in a memory. It is preferable to use a device that reads out according to the rotational position data. Further, 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 the on / off according to the comparison result. ”
The signal may be formed and output. Further, the position detecting means is not limited to the one that detects the rotation of the main shaft, and may be the one that detects the linear displacement of the linear moving body that linearly moves 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 by the input means and 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 as data by the offset setting means,
Then, the current rotation angle of the main spindle 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 according to the shifted current rotation angle data and a control signal is output. Since this is done, it is possible to easily and arbitrarily set the desired offset setting for each section. Therefore, in the glass product forming process, the execution timing of each event can be easily set and changed programmatically during the work process of each section.
In addition, there is an excellent effect that the offset setting for each section with respect to the main axis becomes easy.

[Brief description of 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 molding machine system to which the present invention is applied.

FIG. 4 is a block diagram showing a modification example of a part related to the origin offset setting device in FIG.

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

FIG. 6 is a block diagram showing a modification example of a rotation position data modification adder-related part in FIG. 2;

[Explanation of symbols]

 # 1 to #n stations (working section) 1 Sensor unit for detecting the rotation angle of the rotary drive spindle 2 Data conversion circuit attached to the sensor unit 3 Adder for origin offset 4 Origin offset setting device 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)

[Claims] 1. A glass product molding machine having a plurality of work sections for performing a series of work for molding a predetermined glass product, wherein an execution timing of each event during a work process is set for each section, and rotation is performed. A control device for outputting a control signal based on execution timing data of each event corresponding to the set angle in accordance with the rotation of a drive spindle, wherein an execution timing of a desired event in each section is set to an origin of the section. Input means for inputting data according to the angle from, storage means for storing execution timing data of each event for each section, angle detection means for detecting the current rotation angle of the rotary drive spindle, and for each section Set the offset angle of the origin of the section with respect to the mechanical origin of the spindle. Offset setting means, and the current rotation angle detected by the angle detection means are respectively shifted by the offset angle set by the offset setting means for each section, and the current rotation angle data from the storage means according to the shifted current rotation angle data. A control device for a glass product molding machine, comprising: output means for reading out execution timing data of an event for each section and outputting a control signal.