JP4729192B2 - Film feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film supply apparatus that sequentially forms a film having a predetermined length by sequentially cutting long belt-like films that are continuously supplied to a predetermined film supply position.
[0002]
[Prior art]
For example, in order to form individual labels by sequentially cutting a label-forming base material, in which labels formed of plastic films are continuously connected, to a predetermined length, and supplying the labels to a container mounting apparatus which is the next process In addition, as a label supply apparatus that sequentially conveys to a predetermined supply position, there is one as shown in FIG.
[0003]
As shown in the figure, the label supply device 60 forms individual labels L by sequentially cutting the supplied strip-shaped label-forming base material M into a predetermined length. The rotary blade 61a and the fixed blade 61b And a predetermined label supply position set on the lower side of the base material cutting means 61 with the base material cutting means 61 and the label L formed by the base material cutting means 61 cutting the label forming base material M. label transport means 62 for sequentially transporting to α.
[0004]
In the label conveying means 62, a number of suction holes are fixed along the longitudinal direction at the center in the width direction, spanned between a driving pulley 63a and a driven pulley 63b provided in the vicinity of the cutting position and the label supply position α, respectively. Two conveying belts 64 formed at intervals, a suction mechanism 65 for sucking and holding the label L on the conveying belt 64, and a suction mechanism 65 by sequentially bringing the label L into close contact with the conveying belt 64 from the lower end to the upper end. And the suction assisting means 66 for assisting the suction and holding operation of the label L to the transport belt 64. The rotary blade 61a and the drive pulley 63a are in the same servo state in a mechanically synchronized state. The motor is rotated by a motor (not shown).
[0005]
Accordingly, the individual labels L formed by sequentially cutting the supplied label-forming base material M by the base material cutting means 61 are sequentially applied to the transport belt 64 by the suction auxiliary means 66 from the lower end portion to the upper end portion. In a state where the belt is reliably sucked and held by the conveyance belt 64, the sheet is conveyed to the label supply position α by the conveyance belt 64 and delivered to the label mounting device via the label delivery device 70.
[0006]
[Problems to be solved by the invention]
By the way, as described above, the label supply device 60 performs the rotational drive of the rotary blade 61a in the base material cutting means 61 and the circulation drive of the transport belt 64 in the label transport means 62 by a common servo motor. In general, the rotation speed of the rotary blade 61a, the conveyance speed of the conveyance belt 64, and the like are set with reference to the long label that maximizes the conveyance speed of the conveyance belt 64 so as to correspond to the label L having a length of. Yes.
[0007]
Accordingly, when a short label is to be supplied by such a label supply device 60, the cut speed of the label forming substrate M by the substrate cutting means 61 is shortened by reducing the supply speed of the label forming substrate M. Therefore, in the case of a short label, the difference between the supply speed of the label-forming base material M and the transport speed of the label L becomes larger than necessary in comparison with the long label, and the label cut by the base material cutting means 61 There is a problem that a shift is likely to occur when L is delivered to the transport belt 64, and the label L cannot be supplied to the label supply position α at a predetermined timing.
[0008]
Therefore, an object of the present invention is to provide a film supply apparatus that can reliably supply a film to a predetermined supply position at a predetermined timing regardless of the length of the film.
[0009]
[Means for solving the problems and effects thereof]
In order to solve the above-mentioned problem, the invention according to claim 1 includes a cutting means having a rotary blade and a fixed blade that sequentially cut a continuous strip-like long film to a predetermined length at a predetermined cutting position; a conveying means for the film cut to a predetermined length by the cutting means, sequentially transported to the supply position in a state of being attracted to the conveyance belt moves cyclically between said cutting position and predetermined supply position, the conveyor belt A cutting drive motor for rotating the rotary blade, the detecting means for detecting the film conveyed from the cutting position to the supply position while being adsorbed to the supply position between the cutting position and the supply position ; the conveyor belt and the conveyor drive motor for circulating movement is provided separately, based on the shift amount of the detection timing of the film detected by said detecting means, said transportable By controlling the use driving motor for adjusting the moving speed of the conveyor belt, there is provided a film supplying apparatus which is characterized in that so as to convey to the supply position the film at a predetermined supply timing .
[0010]
As described above, the film supply device is provided with the cutting drive motor for rotating the rotary blade and the conveyance drive motor for circulating and moving the conveyance belt, so that when supplying a short film, By reducing the transport speed of the transport belt, the transport speed of the strip film is reduced, so that the difference between the transport speed of the transport film and the transport speed of the film by the transport belt does not become extremely large. Even when a short film is to be supplied, the film can be reliably supplied to the supply position at a predetermined timing without causing a shift when the film is transferred to the transport belt. In particular, this film supply apparatus is provided with detection means for detecting, between the cutting position and the supply position, a film that is conveyed from the cutting position to the supply position while adsorbed to the conveyance belt, and is detected by the detection means. Since the film is transported to the supply position at a predetermined supply timing by controlling the transport speed of the transport belt by controlling the transport drive motor based on the detection timing deviation amount, the cutting means Even if a slight deviation occurs when the long cut film is transferred to the conveyance belt, the deviation is corrected during the conveyance of the film, so that the film is surely supplied to the supply position at a predetermined timing. Can do.
[0011]
Further, as the inventions according to claim 2, in the film feeding device of the invention according to claim 1, after adjusting the conveyance timing of the film by changing the moving speed of the conveyor belt, the conveyor belt It is also possible to always control the transport drive motor in one direction when the movement speed of the first is returned to the reference speed and the transport timing of the film is adjusted.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows a label mounting system 1 for mounting a cylindrical shrink label (hereinafter referred to as a label) L on a PET bottle (hereinafter referred to as a bottle) B. The label mounting system 1 includes a belt. Forming the label L while sequentially cutting the bottle supply device 2 composed of the conveyor 2a, the conveying screw 2b and the star wheel 2c, and the long label forming substrate M fed from the substrate roll by the substrate feeding unit 3a, A label supply device 3 for sequentially supplying the label L to the label supply position α, a label delivery device 4 for receiving the label L supplied to the label supply position α by the label supply device 3 and transporting the label L to the label delivery position β, The bottle B supplied by the bottle supply device 2 is received and conveyed to the label mounting position γ, and the label delivery device 4 The label mounting device 5 for receiving the label L conveyed at the label delivery position β and mounting the label L on the bottle B at the label mounting position γ, and a heating device for thermally shrinking the label L mounted on the bottle B ( It comprises a bottle transport device 6 comprising a star wheel 6a, a transport screw 6b and a belt conveyor 6c for transporting a bottle B with a label L attached to it (not shown).
[0013]
In addition, the said label formation base material M is what the cylindrical label with which the bottle B is mounted | worn is connected continuously, and is wound around the drum in the state folded in the sheet form in the said base material supply part 3a. Yes. Further, the sheet-like label-forming base material M fed from the base material feeding portion 3a is being supplied in order to reduce the crease so that it can be easily opened into a cylindrical shape again when the label L is attached to the bottle B. In FIG. 1, the folding position is changed once standing up (see FIG. 1).
[0014]
As shown in FIGS. 1 and 2, the label supply device 3 includes a base material supply means 10 for continuously feeding a long label-forming base material M fed from the base material feed section 3a at a predetermined speed. The base material cutting means 20 that sequentially cuts the label-forming base material M fed by the base material supply means 10 at a constant speed into a predetermined length, and the label formed by being cut by the base material cutting means 20 It comprises label conveying means 30 for sequentially conveying L to the label supply position α. The label supply device 3, the base material cutting means 20, the label transport means 30, the label forming base material M, the label L, and the label supply position α are the film supply device, the cutting means, the transport means, the belt-like film of the present invention, These correspond to the film and the supply position, respectively.
[0015]
As shown in FIG. 2, the substrate supply means 10 is driven by a drive roller 11 driven by an independent servo motor, and a label-formed substrate M folded in a sheet shape between the drive roller 11. The label forming base material M sandwiched between the rollers 11 and 12 is formed at a constant speed by the rotation of the driving roller 11, and the lower base material cutting position where the base material cutting means 20 is provided. Sent out.
[0016]
The base material cutting means 20 is composed of a fixed blade 21 fixedly installed at a base material cutting position and a rotary blade 22 driven to rotate by an independent servo motor. Each time the rotary blade 22 makes one rotation. In addition, by sequentially cutting the label-forming base material M that is continuously fed out at a constant speed by the base material supply means 10, labels L having a predetermined length are sequentially formed.
[0017]
The label conveying means 30 is stretched over a guide roller 32 and a drive pulley 34 provided in the vicinity of the substrate cutting position and the label supply position α, respectively, and in a state where a certain tension is applied by the tension roller 35, Two conveyor belts 31 that circulate between the cutting position and the label supply position α at a speed faster than the supply speed of the label forming substrate M, and a suction mechanism 36 that sucks and holds the label L on the conveyor belt 31. And a suction assisting means 38 for assisting the suction and holding operation of the label L to the transport belt 31 by the suction mechanism 36 by sequentially bringing the label L into close contact with the transport belt 31 from the lower end to the upper end thereof. The pulley 34 is rotationally driven by an independent servo motor different from the servo motor for driving the rotary blade 22. . At the label supply position α, a stopper S for positioning the conveyed label L is provided.
[0018]
As shown in FIG. 3, the conveyor belts 31 are arranged in parallel at an interval narrower than the width of the label L to be conveyed, and each conveyor belt 31 has a central portion in the width direction along the longitudinal direction. A large number of suction holes 31a are formed at regular intervals.
[0019]
As shown in FIG. 2, the suction mechanism 36 includes a suction box 37 disposed between the guide rollers 32 along the conveyor belts 31 and a connection port 37 b formed in the suction box 37. And a suction device (not shown) such as a vacuum pump connected via a suction port 37a is opened on the contact surface of each suction box 37 with the transport belt 31 (see FIG. 3). In each suction box 37, a plurality of rollers 37c are provided to support the transport belt 31 in the suction port 37a portion.
[0020]
As shown in FIG. 2, the suction assisting means 38 is provided so as to face each of the conveyor belts 31 with the conveyance line of the label L interposed therebetween, and includes a pair of pressing rollers 39 and three guide rollers. 42a, 42b, 43 and a belt 45 that is stretched around the drive pulley 44, and a tension applying mechanism 46 that applies tension to the belt 45.
[0021]
The drive pulley 44 is driven by a servomotor that circulates and moves the conveyor belt 31 described above, and the drive pulley 44 so that the belt 45 circulates at the same speed as the movement speed of the conveyor belt 31. A rotation speed of 44 is set.
[0022]
The pressing roller 39 presses the label L toward the conveying belt 31 via the belt 45 in order to bring the label L sent from the substrate cutting position into close contact with the conveying belt 31. Near the lower part of the cutting position, it is screwed into a ball screw 40 supported so as to be rotatable at a fixed position along the conveying belt 31 and attached to a nut member 41 that moves up and down as the ball screw 40 rotates. Therefore, by operating the handle 40a attached to the ball screw 40 and rotating the ball screw 40, the pressing roller 39 can be moved up and down and set at a predetermined position.
[0023]
Further, as shown in FIG. 2, when the base material cutting means 20 cuts the label forming base material M, the setting position of the pressing roller 39 is such that the lower end portion of the label L formed by the cutting is higher. The pressure roller 39 is set so as to be sandwiched between the conveyor belt 31 via the belt 45. Therefore, when labels L having different lengths (heights) are mounted on the bottle B, the setting position of the pressing roller 39 is operated by operating the handle 40a when the label forming substrate M is cut as described above. The lower end portion of the label L is adjusted so as to be sandwiched between the upper side pressing roller 39 and the conveying belt 31.
[0024]
When the pressing roller 39 rises to the position indicated by the one-dot chain line in FIG. 2, it interferes with the upper guide roller 42a. Therefore, the guide rollers 42a and 42b are shown by the one-dot chain line in FIG. It retracts to the position shown.
[0025]
The tension applying mechanism 46 includes a pivot arm 47 whose base end is pivotally supported, a tension roller 48 attached to the tip of the pivot arm 47, and a tip of the pivot arm 47 urged downward. As described above, when the pressing roller 39 is lifted, the belt 45 is slackened. Therefore, as shown by the alternate long and short dash line in FIG. The moving arm 47 rotates downward and the tension roller 49 presses the belt 45, so that a predetermined tension is always applied to the belt 45.
[0026]
In addition, as shown in FIG. 2, the label supply device 3 is provided with photoelectric tubes 51a and 51b at predetermined positions for detecting the lower end of the label L conveyed by the conveyance belt 31 during the conveyance. Label detection signals from the phototubes 51a and 51b are input to a control means (not shown).
[0027]
When the label detection signal is input from the phototubes 51a and 51b, the control means determines whether or not the detection timing is an appropriate timing, and when the detection timing is deviated from the appropriate timing, The conveyance speed of the label L by the conveyance belt 31 is adjusted by controlling the conveyance drive motor so that the label L is conveyed to the label supply position α at a predetermined supply timing. That is, when the label L is detected earlier than the appropriate timing, the moving speed of the transport belt 31 is appropriately decelerated based on the deviation amount of the detection timing, and when the label L is detected later than the appropriate timing, The moving speed of the conveyor belt 31 is increased as appropriate based on the detection timing deviation.
[0028]
In the label supply device 3 configured as described above, the long sheet-like label-forming substrate M fed from the substrate feeding unit 3a is continuously cut at a predetermined speed by the substrate feeding means 10 at the substrate cutting position. And a predetermined label L is formed by being sequentially cut by the substrate cutting means 20. The label L thus formed is sucked and held by the conveying belt 31 by being sequentially pressed against the conveying belt 31 by the suction auxiliary means 38 from the lower end portion to the upper end portion thereof, and then supplied with the label by the conveying belt 31. It is transported to the position α and delivered to the label delivery device 4 at the label supply position α. However, if there is a shift in the transport timing of the label L, as described above, the shift is corrected during the transport. The label L is always reliably supplied to the label supply position α at a predetermined timing.
[0029]
As described above, the label supply device 3 is provided with the cutting drive motor and the transport drive motor individually, and controls the transport drive motor based on the detection timing of the label L detected during the transport. Therefore, since the conveyance speed of the label L is adjusted, a deviation occurs when the label L formed by cutting the continuously supplied label forming substrate M by the cutting means 20 is transferred to the conveyance belt 31. However, the deviation can be corrected during the conveyance of the label L, and the label L can be reliably supplied to the label supply position α at a predetermined timing.
[0030]
Moreover, in such a label supply device 3, as described above, since the stopper S for positioning the label L is normally provided at the label supply position α, when the thin label L is to be supplied, If the label L is displaced during delivery to the transport belt 31, the thin label L is pressed against the stopper more than necessary at the label supply position α, and the waist break occurs, so that the label mounting device 5 can be properly opened. However, in this label supply device 3, as described above, the label L can be reliably placed at the label supply position α at a predetermined timing. Since it can be supplied to the bottle B, even if it is a thin label L, it does not fold and can be securely attached to the bottle B. To become. Therefore, the label supply device 3 is particularly effective when supplying such a thin label L.
[0031]
Moreover, in the conventional label supply apparatus driven by the same servo motor in a state where the rotary blade and the conveyor belt are mechanically synchronized, as shown in FIGS. 5 (a) and 5 (b), Whether a long label is supplied or a short label is supplied, that is, regardless of the length of the cut length CL, the conveyance pitch CP of the label by the conveyance belt cannot be changed. In this label supply device 3 in which a drive motor and a conveyance drive motor are individually provided, as shown in FIGS. 4A and 4B, when a short label is supplied, that is, the cut length CL is short. In this case, the conveyance pitch CP of the label L can be reduced by decreasing the conveyance speed CV of the conveyance belt 31. Therefore, even when a short label is supplied, the difference between the supply speed of the label forming substrate M and the conveyance speed of the label L does not have to be increased more than necessary as in the conventional label supply apparatus. When the label L is delivered to the transport belt 31, the label L is less likely to be displaced, and by reducing the transport speed, the durability of the transport means 30 such as the transport belt 31 is improved.
[0032]
In the above-described embodiment, the conveyance timing of the label L is adjusted by decelerating or increasing the moving speed of the conveyance belt 31 according to the detection timing of the label L. For example, after adjusting the transport timing of the label L by changing the travel speed of the transport belt 31, the transport speed of the transport belt 31 is once returned to the reference speed, and the transport timing of the label L is changed. When adjusting the speed, it is also possible to always control the transport drive motor in one direction, such as always decelerating or constantly increasing the speed.
[0033]
In the above-described embodiment, the label L is sucked and held by the conveyor belt 31, but the present invention is not limited to this. For example, the label is attracted to the surface of the conveyor belt using static electricity or the like. It is also possible.
[0034]
In the above-described embodiment, the label supply apparatus that forms the individual label L by cutting the label forming substrate M into a predetermined length and conveys the label L to the label supply position α has been described. However, the film supply apparatus is not limited to this, and forms a film of a predetermined length by sequentially cutting long strips of film that are continuously supplied, and sequentially supplies them to a predetermined film supply position. It can be applied when transporting.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a label mounting system incorporating a label supply apparatus as an embodiment of a film supply apparatus according to the present invention.
FIG. 2 is a schematic side view showing the label supply apparatus of the above.
FIG. 3 is a front view showing the same conveyor belt.
FIGS. 4A and 4B are explanatory views for explaining a state in which the cut length is changed in the above-described label supply apparatus.
FIGS. 5A and 5B are explanatory diagrams for explaining a state in which the cut length is changed in a conventional label supply apparatus. FIGS.
FIG. 6 is a schematic side view showing a conventional label supply apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Label mounting system 2 Bottle supply apparatus 3 Label supply apparatus (film supply apparatus)
4 Label delivery device 5 Label mounting device 6 Bottle transport device 10 Base material supply means 20 Base material cutting means (cutting means)
21 Fixed blade 22 Rotating blade 30 Label conveying means (conveying means)
31 Conveying belt 36 Suction mechanism 38 Suction assisting means 51a, 51b Photoelectric tube L Label (film)
M Label-forming substrate (band film)
α Label supply position β Label delivery position γ Label mounting position

Claims (2)

A cutting means having a rotary blade and a fixed blade for sequentially cutting a continuous belt-like film that is continuously supplied into a predetermined length at a predetermined cutting position;
A transport unit that sequentially transports the film cut to a predetermined length by the cutting unit to the supply position in a state where the film is adsorbed by a transport belt that circulates between the cutting position and the predetermined supply position ;
Detecting means for detecting the film conveyed from the cutting position to the supply position in a state of being adsorbed to the conveyance belt between the cutting position and the supply position;
A cutting drive motor that rotates the rotary blade and a conveyance drive motor that circulates and moves the conveyance belt are separately provided ,
The film is supplied at a predetermined supply timing by controlling the transport drive motor and adjusting the moving speed of the transport belt based on the shift amount of the film detection timing detected by the detection means. A film supply apparatus characterized in that the film is conveyed to a position . After adjusting the transport timing of the film by changing the transport speed of the transport belt, the transport speed of the transport belt is temporarily returned to the reference speed, and when adjusting the transport timing of the film, the transport drive The film supply apparatus according to claim 1, wherein the motor is always controlled in one direction .

Images