DE2806786A1 - Control circuit for cigarette making machine transporter - selects actuating pulses for acting on transported cigarettes and filters - Google Patents

Abstract

The control and actuating system is used in cigarette making industry, for cigarettes and filter plugs transported along a production machine. The transporter path operations are controlled by control signals which are delayed synchronously with the transport of the items. The interaction is ensured with precision even at high transporter speeds. A sequence of timing pulses are triggered while the items are transported through the successive transporter sections. A pulse is selected which controls the starting of the control signal active stage. This selected pulse ensures synchronous delay of the control signals. When the items have reached the point of interaction then the control signal becomes effective. Another pulse is selected for ensureing termination of the action of control signals.

Description

Stw .: Controlling the timing of the circuit - clock multiplication - A 1519 procedure and circuitry for controlling a tobacco processing industry article Acting Device The invention relates to a method for controlling the effect on articles of the tobacco processing industry, in particular on cigarettes, filter rods or the like, which are consecutive on a production or processing machine be promoted, the conveying path in each of two consecutive articles limited conveyor sections is divided, and the action at one point of action is controlled by control signals that are delayed in synchronism with the conveyance of the article will.

The invention also relates to a control circuit arrangement one on articles of the tobacco processing industry (cigarettes, filter rods or such) acting device on a production or processing machine, with a conveyor for conveying the articles to the action device whose Control arrangement control signals can be fed.

The aforementioned articles are in particular rod-shaped Smoking articles such as cigarettes, cigarillos, cigars or around filter rods. With the However, the method and the circuit arrangement according to the invention can also have the effect on other articles of the tobacco processing industry, e.g. on cigarette packs, being controlled.

The object underlying the invention is the point in time the effect on articles conveyed one after the other in the machine cycle, even with high conveyor speeds, to be able to adjust.

Stw .: control activation time - clock multiplication - A 1519 Die Solution according to the invention is that - starting with a certain position of an article on its conveyor track - a sequence of clock pulses is triggered, which are dispensed while the article is being conveyed through the following conveyor section is, and that one of the clock pulses is selected, the beginning of the taking effect of the control signal controls.

The selected clock pulses can according to a preferred Further development of the invention synchronously with the promotion of articles control signals delay; when the articles have reached the point of action, solve them - if necessary with an adjustable time shift to the machine cycle - the beginning of the The control signals become effective.

According to a further embodiment of the invention, another Clock pulse can be selected, which triggers the end of the effectiveness of a control signal. These clock pulses can also be synchronized with the conveyance of articles control signals delay, whereby, when the articles have reached the point of action, the Trigger the end of the control signals becoming effective.

The selection of the clock pulses that trigger and / or terminate the action can be in a preferred embodiment of the invention by counting the clock pulses reach.

The aforementioned circuit arrangement according to the invention is characterized by a clock pulse generator, which - starting with a certain position of an article on its conveyor track - emits a series of clock pulses while the item is funded by the following conveyor section; the circuit arrangement is further characterized by a selection circuit for selecting the beginning of the Effective value of the clock pulse that triggers the control signal Stw .: Controlling the time of action - clock multiplication - A 1519 A preferred further development the invention is characterized by a between the selection circuit and the Control arrangement of the action device switched shift register, whose Shift clocks are formed from the selected clock pulses.

A further development of the invention is characterized by a further selecting the end of the control signal triggering clock pulse Selection circuit.

An adjustable counter is particularly suitable as a selection circuit.

With the mentioned use of shift registers for synchronous delay the clock pulse can be used to compensate for differences in length of the article be provided counter for the number of effective shift levels.

The advantage achieved with the invention is that 5ei high conveying speeds of the articles and handling devices that may be Have response dead times, a very precise setting of the beginning and - if necessary - the end of the action is achievable.

Stw .: exposure time puSct control talct multiplication - A 1519 Die The invention will be explained in more detail with reference to the drawing depicting an exemplary embodiment explained. FIG. 1 shows a section of a strand machine for production rod-shaped article FIG. 2 a working synchronously with the machine of FIG Pulse generator for generating clock pulses, FIG. 3 a selection circuit for selecting of clock pulses, Figure 4 is a pulse diagram0 Stw .: time of action control clock multiplication - A 1519 In Figure 1 is the end section of a strand machine 1 for the manufacture of rod-shaped articles 2 of the tobacco processing industry. The machine can be a rod machine for making cigarettes, Trade cigarillos or cigars; however, the strand machine can also be used to manufacture serve of filter rods. She works in such a way that mostly enveloped by an endless one Strand 3 made of tobacco (cigarettes, cigarillos, cigars) or filter material (filter rods) the article 2 is continuously cut off by means of a rotating knife device 4 and are conveyed further in a prism channel 6 in the direction of their longitudinal axes, until they are separated from each other by a rotating accelerator 7 and in troughs 8 of a deposit drum 9 are pushed in.

The articles are then conveyed on by the depositing drum 9, either to a filter attachment machine on which the filter plug is attached or to a tray filler on which the items are filled into containers, or to a packing machine on which the articles are packed.

The articles designed as filter rods can be sent to the transmitting station be fed to a pneumatic transport system.

The conveying path of the successively conveyed articles on the strand machine and on the downstream machine, e.g.

a filter attachment machine, can be divided into individual conveyor sections limited by two consecutive articles. On the strand machine the articles are conveyed close to one another up to the accelerator 7, while it on the deposit drum 9 and the possibly subsequent filter attachment machine be promoted at a distance from each other. A conveyor section is then the way a certain article - starting with a certain starting position - moves back, until the following article Stw .: control time of action - cycle multiplication - A 1519 has reached this starting position.

In the course of the conveyance of the articles on the strand machine or a the aforementioned downstream machines, e.g.

a filter attachment machine, there are stations at which a Acting device is acted on the article.

Such an action device is, for example, a blow nozzle 12 with the article, e.g. defective article, from the prism groove 6 by a blown air pulse can be blown off.

The air nozzle can of course also be installed on a downstream machine, e.g. be arranged in a filter attachment machine.

Another means of exposure is a laser, with holes in it into a cigarette to increase the secondary air flow flowing through the envelope (to produce so-called light cigarettes) can be burned. The tax orders these action devices, e.g. an electromagnetic valve 13 of the blower nozzle 12, must can now be controlled in such a way that the article is influenced at the right time, e.g.

be hit by the air pulse. This point in time differs from that the desired point in time only slightly, for example, the article will be affected by the air pulse no longer correctly hit and / or the leading and trailing article still influences, what can cause disturbances. With the modern very high conveyor speeds however, in the cigarette industry, it is difficult to control the arrangement of an actuator set so that it responds at exactly the right time, namely then, if the article hits the action device exactly during its passage is the right place to begin exposure. So far, one helps oneself so that the control signal (e.g. I3. the blow-out signal) is synchronized with the delivery of the Article is delayed, for example in a known manner by means of a shift register is possible, through whose shift steps the control signal of shifting Stw .: Control the time of effect - clock multiplication - A 1519 pulses are pushed, whose frequency is proportional to the machine speed, and each after Passing through a conveyor section are delivered. It must now be ensured be that such a delayed control signal at the correct point in time at the control arrangement the action device arrives, namely when the article to be influenced is in the correct position in relation to the action device.

To solve this problem is with the knife apparatus 4, which is in the Example of cutting an article 2 from the strand 3 once around, one Clock disk 14 (Figure 2) connected, which rotates once between two cuts. A cam 16 is located on an inner circle, one on an outer circle Row of cams 17 (10 in number) equidistant from one another. Of the When passing a proximity switch 18, control cam 16 triggers a so-called Synch pulse off while Article 2 is not yet cut off with its leading end, however, is already at the beginning of the first conveyor section. The cams 17 release a further proximity initiator 19 as they pass Sequence of clock pulses. This pulse sequence is thus within that conveyor section of Article 2, the beginning of which is determined by the sync pulse and in which the Article 2 is promoted through the sphere of influence of the nozzle 12.

In Figure 3, a selection circuit 21 is shown, which the pulses of the proximity switches 18 and 19 described in FIG. 2 each via a pulse shaper stage 22 or 23 are supplied.

The selection circuit 21 essentially consists of a preset baron Counter 2.1, which is connected to input b with clock pulses from proximity switch 19 to input a is acted upon with reset pulses from rkrcitneZrurlgsinitiator 13 e. To recruitment serve selector switch 26 bir "3.

Stw .: control injection time - clock multiplication - A 1519 Der first selector switch 26 (set to "2" in the example) is used to select the Clock pulse from proximity switch 19, which determines the start of the control signal and the memory input a of an electronic memory 31 is supplied; the second Selector switch 27 (set to "5" in the example) is used to select the clock pulse of proximity switch 19, which determines the end of this control signal, and the clear input b of the memory 31 is supplied. The signal present at the output c of the memory 31 for the beginning of the action process is thus compared to that of the sync pulse fixed start of the conveyor section of the means of the knife device 4 from Strand 3 of truncated article 2 postponed. Is e.g. the blow nozzle 12 arranged immediately behind the knife apparatus 4, it is associated with it Solenoid valve 32 in a compressed air line 33 is only energized when the cut Article 2/10 of the length of the conveyor section determined by proximity initiator 18 has covered.

The energization of the solenoid valve 32 is terminated when the article Has covered 5/10 of the length of this conveyor section. In other words: the The start of the control signal is set by selector switch 26, the end of this signal by selector switch 27 so that the position of the control signal within the conveyor section, in which the article runs past the action device, can be freely preselected.

The pulse limited by the selected counting cycles is thus simultaneous the control signal for the action device (nozzle 12). Its time shift compared to the machine cycle is due to the special selection of the counter cycle pulses has been achieved according to the invention.

Instead of a blower nozzle, other means of action can also be used be provided, e.g. a laser device for burning holes in cigarettes Stw .; Control time of action - clock multiplication - A 1519 The counter 24 is at the beginning of the following conveyor section by a signal at its reset input a reset the initial value.

The tSah] switch 28, whose signal is the memory input a of an electronic Memory 33 is supplied, sets in the same way the beginning of another signal, a delay clock, fixed, while the selector switch 29, its output signal the erase input b of the memory 33 is supplied, d the end of this delay cycle specifies. The position of the selector switch 29 shows that the end of the delay cycle can protrude into the next conveyor section (machine cycle). The one from the selector switches 28 and 29 limited clock pulse serves to have an effect on the article at a another place, e.g. B. a downstream filter attachment machine to control by e.g. again the solenoid valve 34 of a blow nozzle 36 for ejecting faulty Articles that have been recognized by a testing device 37 as defective, is excited. The error signal, which now represents the control signal, is increased by the delivery time of the defective article from the inspection point to the exhaust nozzle is delayed according to the cycle, which is possible by means of a shift register 38. The shift clocks of this shift register are the delay clocks from output c of memory 33, whereby by the selection circuit 21 the shift cycles compared to the machine cycle (e.g. the impulse from cam 16 can be in the proximity initiator 18) shifted in time in the manner described above could be.

With the solution according to the invention, the time shift remains the delay cycles are thus obtained regardless of the machine speed, so that the control signal (error signal) which is amplified in the amplifier 39 with any desired shift compared to the machine cycle, Stw .: Control time of action - clock multiplication - A 1519 in which the faulty Article had been promoted to the solenoid valve 34 arrives when the faulty article in the action area of the action device (blow nozzle 36) has arrived.

It is within the scope of the invention, the shift register 38 shift clocks feed that coincide in time with the machine cycle, and the shift the control signal, e.g.

the error signal from the test device 37, with the selection circuit (21) according to the invention only to be carried out when this is synchronized with the machine cycle Error signal reaches the conveyor section in which the action device in which Example so the blower nozzle 36 is arranged.

It is also within the scope of the invention, according to FIG. 3a to make the number of effective shift stages of the shift register 38 variable. This is advantageous or even necessary if the length of the article is 2 so varies greatly in that the sum of the lengths of the shortest articles is more than an article length is differentiated from the sum of the lengths of the longest articles. In In this case it can happen that a control signal shifted through a shift register meets at the point of action with the leading or trailing article. To solve this problem, an additional selection circuit 41 is used with a Selector switch 42 and a locking arrangement consisting of three AND gates 42, 43 and 44. With the arrangement of Figure 3a can be set, -an which the three last stages g, h, i of the shift register 38 with the shift stages 38a ... 38i the control signals which have been fed to stage a leave the shift register. In the illustrated position of the selector switch 42, this is the case at level g, since only AND element 42 can switch through, while the AND element 43 and 'Szr the negation of the signal on line 12a remain blocked when sent to the associated Shift levels h or i output signals appear.

Stw .: control time of action - cycle multiplication - A 1519 actual the selector switch 42 is connected to line 42b, then the shift stage h of the shift register 38 released via the AND gate 43, while a connection rit line 42c the Shift stage i via AND gate 44 releases.

By setting the selector switch 42, it is possible to determine at which of the last three shift stages g, h, i the control signal enters the shift register 38 leaves. This is an influence on the delay time and an adjustment option changes in the length of the article are possible.

FIG. 4 shows clock diagrams for one of the shown in FIG. 4a an endless strand 3 cut by the knife 4 article 2. The interfaces are denoted by 4a and 4b.

The diagram in FIG. 4b shows the proximity initiator 18 emitted Sync signals.

The diagram in FIG. 1c shows the proximity initiator 19 emitted Counting clock signals (10 per article).

The diagram in FIG. 4d shows that controlled by selector switch 26 Beginning and end of a delay cycle controlled by selector switch 27.

The diagram in FIG. 4d shows that of the selector switches 28 and 29 controlled start bz =! Z. the end of another delay cycle.

Claims (12)

Stw .: control time of influence-clock multiplication - A 1519 claims Methods of controlling exposure to articles of the tobacco processing industry, in particular on cigarettes, filter rods or the like, which are on a production or processing machine are successively conveyed, the conveying path divided into conveyor sections limited by two consecutive articles and the action at a point of action is controlled by control signals, which are delayed in synchronism with the promotion of the articles, characterized in that that - starting with a certain position of an article on its conveyor track - a Sequence of clock pulses is triggered, which are delivered while the article is conveyed by the following conveyor section, and that one of the clock pulses is selected, which controls the start of the control signal coming into effect. 2. The method according to claim 1, characterized in that the selected Delay clock pulses in synchronism with the conveyance of articles, and control signals that when the articles have reached the point of action, they begin to take effect trigger the control signals. 3. The method according to claim 1 and / or 2, characterized in that another clock pulse is selected, which marks the end of the effectiveness of the control signal triggers. Stw .: control time of action - cycle multiplication - A 1519 4. Method according to Claim 3, characterized in that the further clock pulses also delay control signals synchronously with the conveyance of articles, and that they, when the articles have reached the point of action, the end of the coming into effect trigger the control signals. 5. The method according to one or more of the preceding claims, characterized in that the selection of the clock pulses by counting the clock pulses he follows. 6. The method according to one or more of the preceding claims, characterized in that the act on the articles in their removal of the conveyor track is a function of error signals. 7. Circuit arrangement for controlling a tobacco processing article Industry (cigarettes, filter rods or the like) acting influence device on a production or processing machine, with a conveyor for feeding the article to the action device, the control arrangement of which can be supplied with control signals are, characterized by a clock pulse generator (16 ... 22), which - starting with a certain position of an article (2) on its conveyor track - a sequence of Gives clock pulses while the article is conveyed through the following conveyor section and characterized by a selection circuit (21, 26, 28) for selecting of the clock pulse that triggers the start of the control signal becoming effective. 8. Circuit arrangement according to claim 7, characterized by an intermediate the switch (21) and the control Stw .: time of action control clock multiplication - A 1519 arrangement (34) of the control device (36) switched shift register (38) whose shift clocks from the selected clock pulses are formed. 9. Circuit arrangement according to claim 7 and / or 8, characterized by another triggering the end of the control signal becoming effective Clock pulse selecting selection circuit (21, 27, 29). 10. Circuit arrangement according to one or more of the preceding Claims 7 to 9, characterized by one designed as an adjustable counter (24) Selection circuit. 11. Circuit arrangement according to one or more of claims 7 to 10, characterized by a selector (42) for the number (g ... i) of the effective shift levels of the shift register (38). 12. Circuit arrangement according to one or more of claims 7 to 11, characterized in that the injection device is a blow-out device (129 36) is 0