JPS6283880A - Apparatus for adjusting printing position of cigarette in cigarette manufacturing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cigarette printing position adjusting device for a cigarette manufacturing machine.

For cigarette manufacturers, it is important not only to maintain the quality of the contents of the cigarette, such as the flavor, but also to maintain the quality of the appearance. Appearance quality includes ensuring that the position of marks and other prints on the surface of the cigarette paper is always in the specified position, and an adjustment device is used to ensure that the print is in the specified position. is provided.

[Prior art]

A cigarette making machine is generally constructed as shown in FIG. In the figure, the shredded tobacco is sucked into the chimney l and rises, and is adsorbed and stacked on the lower surface of the perforated cigarette conveyor 3 disposed on the lower surface of the intake chamber 2. The stacked shredded tobacco is conveyed to the left in the figure, and is adjusted to an appropriate layer thickness by a trimming device 4. The shredded tobacco whose layer thickness has been adjusted is fed from the roll 6a of the paper supply unit 60, transferred onto the wrapping paper 10 stacked on the cloth tape 8, and wrapped in the wrapping paper. It is glued by 12. The glued portion of the wrapping paper is dried by a heater 4 and formed into a rod-shaped cigarette. The shaped cigarette rod is cut into individual cigarettes by a cutter 16. The cut cigarettes are transferred to a conveyor (not shown) and transported, and finally packed into a tray.

FIG. 8 (al indicates the above-mentioned rod-shaped cigarette 20, and the surface of the cigarette 200 is marked with a mark 20a printed by a printer (not shown) provided between the paper supply section 6 and the cloth tee 18. ing.

The rod-shaped cigarette 20 is then cut along the line 1 by a cutter 16 to form individual cigarettes 21 of a predetermined length.

In the illustrated example, the marks 20a are placed adjacent to the left and right sides of every other cutting line l, but this will be done in a later step.
As shown in FIG. 8(b), a pair of cigarettes 21, 21
This is because it is convenient to connect the filter tip 1 in between and cut it at the center line 2' of the filter 22 to make the filter-attached cigarette 23 shown in FIG. 8(C).

By the way, the mark 20a may be damaged due to misalignment of the printing position by the printer or slippage of the paper between the printer and the cutting section.
If the relative position of the cutting line 2 deviates, the mark on the cigarette 21 will deviate from the specified position, and the appearance quality will be impaired. In particular, when marks are printed as shown in FIG. 8 (al), the mark position shift between the left and right cigarettes 21 occurs in completely opposite directions, so the mark positions between the cigarettes 21 vary greatly. growing.

Conventionally, in order to prevent such misalignment of the printing position on cigarettes, a worker would periodically pull out the manufactured cigarettes and check whether the printing on the cigarettes was in the specified position and, if not, how much. It was checked to see if there was any misalignment, and based on the results, adjustments were made by manually moving an adjustment member on the paper roll supply path to bring the printing to the proper predetermined position.

[Problem that the invention seeks to solve]

With the conventional position adjustment device described above, the operator cannot always be on standby for adjustment work, so the tolerance range for positional deviation must naturally be wide, and the Some variation occurs in the printing position. Furthermore, in cigarette manufacturing machines that operate almost 24 hours a day, it is extremely undesirable in terms of working conditions or product costs that a worker must be present to manage the printing position, and for this reason, the printing on cigarettes is There is a need for an apparatus for automatically performing position adjustments.

[Means for solving problems]

In view of the above-mentioned conventional problems, it is an object of the present invention to provide a cigarette printing position adjusting device for a cigarette manufacturing machine that automatically adjusts the printing on the cigarette so that it is always at a specified position. The device made to achieve this is
A cigarette manufacturing machine that wraps shredded tobacco with wrapping paper sent from a wrapping paper supply section through a printing section to form a stick-shaped cigarette, and cuts the stick-shaped cigarette into a predetermined length at a cutting section to form rolled cigarettes. A mark detector provided between the cutting section and detecting marks printed during printing, and a paper roll supply path provided between the mark detector and the printing section and between the mark detector and the printing section. A print position adjustment roller that changes the length of the print position adjustment roller, a drive source that drives the print position adjustment roller, and a control circuit that controls the drive source, and the control circuit receives a mark detection signal from the mark detector. A printing position signal is formed based on a position reference signal corresponding to a cutting position by the cutting section, and the operation of the drive source is controlled based on a difference between the printing position signal and a set value.

[For production]

In the device according to the invention, the printing position adjusting roller provided between the mark dispenser and the printing section changes the length of the web supply path between the mark detector and the printing section, and the printing position adjustment roller is driven by a drive source that operates based on a difference signal between a printing position signal and a set value formed based on a reference position signal corresponding to the cutting position of the rod-shaped cigar throat and a mark detection signal. Therefore, it is possible to change the mark position relative to the cutting position at the cutting section by changing the length of the paper roll supply path depending on whether the difference signal is positive or negative, and by advancing or delaying the mark detection point. This makes it possible to automatically adjust the printing position on the cigarette after cutting.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cigarette printing position adjusting device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a simplified diagram showing the main parts of a cigarette manufacturing machine incorporating a cigarette printing position adjusting device according to the present invention, in which 30 is a paper supply section, 32 is a printing section, and 34
is a print position adjustment roller, 36 is a mark detector, and 38 is a cutting section. After a mark 40' is printed on the surface of the paper roll 40 supplied from the paper supply section 30 in the printing section 32, the paper roll 40 is transferred to the print position adjustment roller. 34, it passes through a mark detector 36 and is sent onto a cloth tape (not shown), where it wraps up the shredded tobacco that has been sent in a separate route and is glued to form a stick-shaped cigarette 41 that reaches the cutting section 38.

The cutting section 38 cuts the rod-shaped cigarette 41 into rolled cigarettes of a predetermined length.

Now, at the cutting position and the adjacent marks 40', 4 on the left and right
0', if the distance between them is A and B, the printing position is A=
When B, it is at the standard position, when A>B, it is at the advanced position, and when A<B, it is at the delayed position. Therefore, when the position adjustment roller 34 is at the X position as shown in FIG.
>B, the roller 34 is moved in the direction of the 7th position and the paper roll supply path from the printing section 32 to the cutting section 38 is lengthened, so that the printing position is corrected in the direction where A=B. On the other hand, when A<B, the roller 34 may be moved in two position directions.

In order to move the position adjustment roller 34 as described above, the swing shaft 34b of the support lever 34a to which the roller 34 is fixed is rotated clockwise or counterclockwise by a pulse motor 42 serving as a drive source. .

FIG. 3 is a circuit book diagram showing the control circuit of the printing position adjustment device. In the figure, the mark detector 36 detects marks by the light reflected from the wrapping paper 40 when light is projected onto the wrapping paper 40. As shown in FIG. 4(a), when the wrapping paper 40 with a printed mark 40' passes in front of it, a mark detection signal as shown in FIG. 4(b) is output.

The mark detection signal is amplified by the amplifier 50, and an amplified signal as shown in FIG. 4 (C1) is obtained at the output of the amplifier 50. The amplified signal is applied to the mask circuit 52. By holding the output at H level for a certain period of time in response to the input of the detection signal, the mark detection signal within the certain period of time is masked.
In response to an input amplified signal such as 1, an output signal as shown in FIG. 4(d) is sent out.

The output of the mask circuit 52 is input as a trigger signal to the one-shot multi-vibrator 54, and the one-shot multi-vibrator 54 outputs an H signal from the output of the mask circuit 52.
It is triggered in response to the rise to the level and outputs a printing mark signal as shown in FIG. 4(e). The print mark signal is applied to the set input of an R-S flip-flop (FF) 56. When R-3FF56 is set, its output changes from L to H level.

A rotary encoder 58 is linked to the mechanical system of the cigarette manufacturing machine, particularly the cutting section 38, and the rotary encoder 58 outputs a large number of pulse signals as it rotates. The pulsed signal from the rotary encoder 58 is waveform-shaped by a waveform shaping circuit 60, converted into a pulse train, and applied to a position reference signal generation circuit 62 and a check signal generation circuit 64. The position reference signal generation circuit 62 generates one reference position signal per rotation of the rotary encoder 58, as shown in FIG. Apply to the reset input of R-5FF56. On the other hand, the check signal generation circuit 64 outputs a check signal consisting of, for example, 12007 pulses per rotation of the rotary encoder 58, as shown in FIG. 4(b), based on the pulse train applied to its input. The output of the R-3FF 56 is applied to the other input of an AND gate 66 as a gate signal.

When the print mark signal (Fig. 4(e)) is applied to the set input of the R-3FF56, its output rises from L to H level, and the reference position signal (the fourth
When (b)) is applied, its output falls from H to L level and outputs a gate signal as shown in FIG. A check signal is allowed to pass through the AND gate 66.

The check signal passed through the AND gate 66 shown in FIG. The signal is applied to the central processing unit (CPU) 70 via the CPU.

The CPU 70 includes a lead-off module (ROM), a random access memory (RAM), an arithmetic processing unit, etc., and operates according to a program stored in the ROM in advance.
In addition to the printing position signal, a position control setting signal from the position control setting switch 72 for setting the mark position on the cigarette, an input signal from a manual operation section (not shown), and a lamp out signal from the mark detector 36, A logical sum signal of the position control limit signal of the position adjustment roller 34 and the OR gate 74 is inputted via the input circuit 68. And the CPU
70 processes the above signals according to a predetermined program, and outputs a clockwise rotation signal (CW) and a counterclockwise rotation signal (CC) for controlling the pulse motor 42 via an output circuit 76.
W) and a printing position control abnormality signal.

The clockwise rotation signal and counterclockwise rotation signal are respectively applied as gate signals to one input of AND gates 78a and 78b, and gate-control the pulse motor drive signal inputted from the oscillation circuit 80 to the other input. .

ANDGATE 78a.

The drive signal passed through 78b is sent to the pulse motor drive circuit 8.
2, the pulse motor drive circuit 82 rotates the pulse motor 42 in forward and reverse directions based on the drive signal to move the print position adjustment roller 34.

The output of the oscillation circuit 80 is also input to the input circuit 7o, and while the CPU 70 is outputting clockwise rotation signals and counterclockwise rotation signals, the output of the oscillation circuit 80 is input to the input circuit 7o.
8 and monitors whether or not the pulse motor 42 has been controlled by a predetermined amount.

In the above configuration, the work performed by the CPU 70 based on a predetermined program will be explained with reference to the Fuco chart shown in FIG.

For example, the main routine of the program starts when the power is turned on, and initial settings are performed in the first step S1. In this initial setting, position control setting switch 7
Read the position control setting signal set by 2 and press R.
1. At the predetermined storage location of the AM. Data necessary for the CPU 70 to proceed with its work, such as t, is set.

Next, in step S2, it is determined whether the control is in automatic mode, and if the determination is No, control by manual operation input is performed in step S4.

If the mode is automatic and the determination is YES, step S
In step 3, the presence or absence of a control abnormality is determined based on the OR signal of the lamp out signal and the position control limit signal, and the judgment is Y if there is a control abnormality.
If ES, the machine is stopped in step s5. If there is no abnormality and the determination is NO, the process advances to the next step S6. In step S6, it is determined whether a control start button (not shown) has been operated, and if the determination is No, step s2
Return to step S7, and if YES, proceed to the next step S7.

In step S7, it is determined whether or not the control of the pulse motor is on. If this determination is NO, the process returns to step S2, and if YES, the process proceeds to the next step S8.

In step S8, it is determined whether the control is normal rotation control, and if the determination is YES, the process proceeds to step S9, where the pulse motor normal rotation (clockwise rotation) output signal is turned on, and the
If o, proceed to step SIO and reverse the pulse motor (
(counterclockwise rotation) output signal is turned on.

Step S9. After executing S10, the process advances to step S11, where a pulse counter for pulse motor control, which will be described later, is subtracted by a signal from the oscillation circuit 80, and the process advances to the next step 512.In step S12, step Sll
As a result of the subtraction, it is determined whether the contents of the counter have become zero or not. If the determination is NO, the process returns to step S2, and thereafter the counter becomes zero and the determination in step S12 is YES.
83 to Sll are repeatedly executed until S is reached. When the determination in step S12 is YES, step S1
The process proceeds to step S3, where the pulse motor is turned off and then returns to step S2.

By the way, when a check signal is input to the CPU 70 during the execution process of steps 82 to S13 described above, the execution of the main routine is interrupted at that point and the process jumps to the interrupt routine.

In the interrupt routine, the first step SS1 is to count the pulses of a check signal as a print position signal. This pulse count is performed for each print position signal, and the average value is calculated in step SS2 using the past 255 pulses and the latest count value. Stesov SS2
The average value calculated in step SS3 is compared with the set value, and step S8 is performed based on the comparison result.
In step 4, it is determined whether or not control is necessary. The above set value is set by the position control setting switch 72 and is read in advance, and whether or not control is necessary is determined depending on whether the difference between the average value and the set value is greater than a predetermined value. .

If the determination in step SS4 is NO and the difference between the average value and the set value is less than or equal to the predetermined value and no adjustment is required, the process returns to the main routine. Then, in the process of executing the main routine, the program jumps to the interrupt routine again in response to the input of the next check signal. If the determination in step S84 is YES, then in step S35 it is determined whether the adjustment is in the forward direction or in the reverse direction, and in the subsequent step SS6 the number of pulses for driving the pulse motor necessary for position adjustment is calculated, The calculated number of pulses is m<In step SS7, a pulse count value for pulse motor control is set in a counter, and the process returns to the main routine.

The count value set in the counter in step SS7 is used for subtraction in step Sll of the main routine.

In short, the average value is calculated for each print position signal, the position adjustment pulse is calculated, and the counter is reset.

During this time, the counter is subtracted to indicate that the pulse motor was actually driven, and the value is monitored to see if it reaches zero. When the count value reaches zero, the position is assumed to have been adjusted and the pulse motor is turned off. It looks like this.

In the process of the above operations, if the lamp of the mark detector 36 burns out or the position adjustment roller 34 reaches its control limit, resulting in an uncontrollable state, the determination in step S5 is YES.
In response to this, an abnormality signal is output and the machine is stopped. Further, when a manual operation signal is input and the determination in step S3 becomes No, the pulse motor 42 advances based on the manual operation input signal and is driven in the retarding direction.

FIG. 6 shows an example of a mark detector preferably used in the apparatus of the present invention, in which a sensor hood 36b is formed in front of a light emitting and receiving lens head 36a through which the number of paper rolls to be printed passes. For example, air of 700 to 750 wHg is supplied by a cleaning air supply hose 36c, and the supplied air is sent out to the outside from a cleaning air outlet 36d bored in the center of the hood. This prevents the front surface of the lens head 36 from getting dirty and making mark detection inaccurate. Note that 36e is a lead wire of the mark detector.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to automatically adjust the mark position on the cigarette after cutting by moving the printing position adjustment roller according to mark detection, so that the position of the mark on the cigarette after cutting can be adjusted automatically. Compared to conventional systems that make adjustments based on misalignment monitoring, this system not only improves the appearance quality by improving the accuracy of position adjustment, but also reduces costs by eliminating the need for operator monitoring and reducing labor costs. .

[Brief explanation of drawings]

FIG. 1 is a simplified diagram showing an embodiment of the printing position adjustment device according to the present invention, FIG. 2 is a diagram showing the operation of a part of FIG. 1,
Fig. 3 is a circuit block diagram showing the control circuit of the device shown in Fig. 1, Fig. 4 is a diagram showing the states of each part in Fig. 3, and Fig. 5 shows the operation of the central processing unit in Fig. 3. flowchart diagram,
Fig. 6 fat, (bl is a side view and partial front view showing some specific examples in Fig. 1, Fig. 7 is a side view showing the configuration of a general cigarette making machine, Fig. 8 (a) - (C1 is an explanatory diagram showing the manufacturing process of cigarettes. 30... Rolling paper supply section, 32... Printing section, 34...
Position adjustment roller, 36... Mark detector, 38...
Cutting part, 40... Rolling paper, 40'... Mark, 41.
... Rod-shaped cigarette, 42 ... Drive source, 70 ...
Central processing unit (CPU). Patent applicant: Japan Tobacco Inc. Figure 4 Figure 5

Claims (1)

[Scope of Claims] A cigarette manufacturing machine that wraps shredded tobacco with wrapping paper sent from a wrapping paper supply section through a printing section to form a stick-shaped cigarette, and cuts the stick-shaped cigarette into a predetermined length at a cutting section to form rolled cigarettes. a mark detector provided between the printing section and the cutting section and detecting marks on the paper roll printed in the printing section; and a mark detector provided between the mark detector and the printing section. a printing position adjustment roller that changes the length of a paper roll supply path between the printing section and the printing section; a drive source that drives the printing position adjustment roller; and a control circuit that controls the drive source. , forming a printing position signal based on a mark detection signal from the mark detector and a position reference signal corresponding to the cutting position by the cutting section, and operating the drive source based on the difference between the printing position signal and a set value. A cigarette printing position adjustment device for a cigarette manufacturing machine, characterized in that the device controls the cigarette printing position.