JPH0811844A - Device for positioning film to be printed in packing machine - Google Patents

Abstract

PURPOSE:To seal a pack at one spot and bring a part to be printed always at a fixed Position in the use of one kind of film to be printed for a plurality of objects to be packed which differ from one another in kind and in peripheral length. CONSTITUTION:A roll of film 36 is mounted on a roll holder 36 placed above a feeding conveyor 16. A strip of film F pulled out from the roll of film 36 by the use of pulling-out rollers 38, 38 is passed over a first tension roller 44 and fed from above downward, making right angles to the direction of the conveyance of the feeding conveyor 16. The strip of film F fed downward from the feeding conveyor 16 is passed over a second tension roller 62 and rewind rollers 66, 66 and wound on a film take-up reel 60. A registered mark sensor 58 for detecting a registered mark of the strip of film F is placed in the path of the drawn film. When the registered mark sensor 58 detects the mark, a second motor 64 with a brake for rotating the rewind roller 66 is stopped from operating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention draws out a film by feeding it to a film stretched in a direction orthogonal to the direction in which the product to be packed is wrapped, and then the film is wrapped around the film. The present invention relates to a printing position aligning device of a packaging machine for manufacturing a packaging body having a seal portion only at one position by fusing and sealing the film at the rear side of.

[0002]

2. Description of the Related Art As a device for wrapping an object to be wrapped in a body, for example, as disclosed in Japanese Patent Laid-Open No. 57-153809, a film is stretched in a direction intersecting the conveying direction of the object to be wrapped and directed toward the film. A structure has been proposed in which the film is drawn out by supplying the object to be packaged and wound around the body, and then the film is welded and cut behind the object to be packaged. This device controls the film withdrawal so that the previous seal part that remains on the film side when the film is welded and cut will not be used for the next packaging, so that only one seal part is obtained on the package side. Is something that can be.

Further, in the apparatus disclosed in Japanese Utility Model Publication No. 60-7284, a print film winding body and a plain film winding body are arranged in a vertical relationship, and both films are connected to each other to be packaged. It is configured to stretch the film in a state intersecting the transport direction of the object. In addition, in the feeding path of printing film,
A mark sensor for detecting a mark provided on the printing film and a film stopper for forcibly stopping the drawing of the film when the mark is detected are provided. And
When the mark provided on the printing film is detected by the mark sensor when the packaging object is pushed toward the film stretched vertically and the film is wrapped around the peripheral surface of the packaging object, printing is performed. By forcibly stopping the pulling out of the film and pulling out the remaining film necessary for packaging the packaged object from the side of the plain film, the printed portion can always be positioned at a predetermined position on the packaged object. .

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the device disclosed in Japanese Patent No. 153809, the seal portion of the package can be provided at one location, but it is not premised that a printing film is used. Therefore, for example, when a printing film is used in the device, when the size of the packaged object changes, the position of the printing site on the packaged object changes, so printing is performed according to the size of the packaged object. It is necessary to prepare each printed film. For this reason, a loss of time occurs with the film exchange work when changing the order, and the storage management of various printing films becomes complicated.

It is pointed out that the apparatus disclosed in Japanese Utility Model Publication No. 60-7284 described above requires two kinds of films, a printing film and a plain film, which makes storage management complicated. Further, after the drawing of the upper printing film is forcibly stopped, only the lower plain film is drawn out as the object to be packaged advances, so that the peripheral surface of the object to be packaged and the plain film rub against each other. For this reason, it has not been possible to deal with a packaged object that is problematic when rubbed against the film, such as a packaged object that is flexible and easily loses its shape. Further, since the plain film is used, the printed portion cannot be exposed on the entire peripheral surface of the packaged object. Moreover, since the mark provided on the printing film remains on the package, there is a drawback that the commercial value is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the above-mentioned prior art, and it is a solution to the problems. A simple means that does not cause rubbing between the package and the film, and one printing film that allows the printed portion to always face a fixed position for a plurality of types of packaged objects having different outer peripheral lengths. The purpose is to provide a means that can.

[0007]

[Means for Solving the Problems] Overcoming the above-mentioned problems,
To achieve the intended purpose, the present invention winds a film around a peripheral surface of a package by pushing the package toward a film stretched in a direction orthogonal to the supply direction of the package. A packaging machine that fuses and seals the film by a sealing mechanism on the rear side in the supply direction of the packaged object, the supply source of the film and the film to be spread on one side of the supply path of the packaged object. A first tension roller that applies tension to the first tension roller and the first tension roller that is rotated when the first tension roller moves to a required position as the stretched film is wound around the peripheral surface of the packaged object, A pair of film pull-out rollers for pulling out the film from the source are arranged, and on the film pull-out path from the supply source, print marks provided in the film at predetermined intervals in the pull-out direction are detected. A cut sensor, the position of which can be adjusted in the drawing direction of the film, and the second tension roller for applying a tension to the stretched film on the other side sandwiching the supply path of the packaged object, and the fusing by the sealing mechanism. A pair that is rotated at a required timing after sealing, rewinds the film to a position where the sealing portion that remains on the film does not remain on the outer peripheral surface of the next packaged object, and rotation is stopped by the mark detection by the mark sensor. Rewinding roller of
An energizing unit that is energized at a required timing after the fusing and sealing by the sealing mechanism, and forcibly moves the second tension roller to a predetermined position before the rewinding of the film by the rewinding roller, and the winding unit. It is characterized in that a winding body for winding the surplus film rewound by the returning roller in a roll shape is arranged.

In order to achieve the above-mentioned object, another invention of the present application is to surround the article to be packaged by pushing the article to be packaged toward a film stretched in a direction orthogonal to the supply direction of the article to be packaged. A film is wound around a surface, and the film is a packaging machine that melts and seals by a sealing mechanism on the rear side in the supply direction of the packaged object, while sandwiching the supply path of the packaged object, a supply source of the film, A first tension roller that applies tension to the film to be stretched, and a first tension roller that moves to a required position as the stretched film is wound around the peripheral surface of the packaged object. A pair of film withdrawing rollers that are rotated and withdraw the film from the supply source are arranged, and on the film withdrawing path from the supply source, among a plurality of types of objects to be packaged by the film. A mark sensor for detecting a print mark provided on the film at an interval larger than the maximum outer peripheral length is arranged so that the position can be adjusted in the drawing direction of the film, and the mark sensor is extended on the other side of the supply path of the packaged object. A second tension roller for applying tension to the film, and a seal portion and the print mark remaining on the film, which are rotated at a required timing after the fusing and sealing by the sealing mechanism, and the outer periphery of the packaged object to be packaged next. The film is rewound to a position where it does not remain on the surface, a pair of rewinding rollers that are stopped in rotation by the mark detection of the mark sensor, and urged at a required timing after the fusing and sealing by the sealing mechanism. Biasing means for forcibly moving the second tension roller to a predetermined position before the rewinding of the film, and the rewinding roll. Characterized in that the excess film unwound placing a winding body for winding into a roll by la.

In order to achieve the above-mentioned object, still another invention of the present application is to push an article to be packaged toward a film stretched in a direction orthogonal to a supply direction of the article to be packaged. A wrapping machine that winds a film around a peripheral surface and melts and seals the film by a sealing mechanism on the rear side in the supply direction of the packaged object, while sandwiching the supply path of the packaged object,
A supply source of the film, a first tension roller for applying a tension to the film to be stretched, and a first tension roller which is provided as the film to be stretched is wound around the peripheral surface of the packaged object. It is rotated when moved to a required position, and a pair of film drawing rollers for drawing the film from the supply source are arranged, and on the film drawing path from the supply source, a plurality of types of objects to be packaged by the film A mark sensor for detecting a print mark provided on the film at an interval larger than the maximum outer peripheral length of the film, the position of which is adjustable in the drawing direction of the film,
A second tension roller for applying tension to the film to be stretched on the other side of the supply path of the article to be packaged, and a seal portion that is rotated at a required timing after fusing and sealing by the sealing mechanism and remains on the film. And a pair of rewinding rollers that rewind the film to a position where the print mark does not remain on the outer peripheral surface of the next packaged product and rotation is stopped by the mark detection of the mark sensor, and a fusing seal by the sealing mechanism. And a rewinding roller, which is urged at a required timing later and forcibly moves the second tension roller to a predetermined position before the rewinding of the film by the rewinding roller is completed. And a winding body that winds the surplus film into a roll shape are arranged, and the rewinding roller of the rewinding roller according to different external dimensions of the packaged object. Changing means for changing the rotation start timing or rotation speed, control means for generating a rotation start signal of the rewinding roller based on the start timing or rotation speed changed by the changing means, and rotation start from the control means A drive motor for receiving the input of a signal and rotationally driving the rewinding roller.

[0010]

By supplying the object to be packaged toward the film pulled out from the supply source and extending in the direction orthogonal to the direction of supplying the object to be packaged, the film is pulled out and wound around the peripheral surface of the object to be packaged. Attached. At this time, the first tension roller and the second tension roller that apply tension to the film move in the required direction, and when the first tension roller moves to the required position, the pair of film pull-out rollers are rotated. The film is drawn from the source. Then, the film wrapped around the packaged object is melt-sealed by the sealing mechanism at the rear portion in the supply direction of the packaged object, so that the packaged object is wound around the film. A pair of rewinding rollers are rotated at a required timing after the fusing and sealing by the sealing mechanism, and the film is rewound to a position where the sealing portion remaining on the film does not remain on the outer peripheral surface of the packaged object to be packaged next. The surplus film is wound into a roll on the winding body. Further, the biasing means is biased at a required timing after the fusing and sealing by the sealing mechanism, and the second tension roller is forcibly moved to a predetermined position before the rewinding of the film by the rewinding roller is completed. . When the mark sensor detects the print mark provided on the film, the rewinding roller stops rotating and the film rewinding is completed.

Further, in the case of a film provided with print marks at intervals larger than the maximum outer peripheral length in a plurality of types of objects to be packaged by the film, the film is rotated at a required timing after the fusing and sealing by the sealing mechanism. The film is rewound by the pair of rewinding rollers to a position where the seal portion and the print mark remaining on the film do not remain on the outer peripheral surface of the next packaged object.

[0012]

EXAMPLES Next, a film printing alignment apparatus for a packaging machine according to the present invention will be described below with reference to preferred examples. In the examples, the case of packaging triangular sandwiches will be described.

(Regarding Supply Conveyor) FIG. 1 is a side view showing a schematic structure of a packaging machine in which a film printing alignment apparatus according to an embodiment is adopted. The machine frame 14 is provided with a supply conveyor 16 for supplying the sandwich 12 toward a stretched portion of the strip-shaped film F described later. The supply conveyor 16 is composed of a drive pulley 20 rotatably arranged on the machine frame 14 and an endless conveyor belt 22 wound around a plurality of driven pulleys 18, and the drive pulley 20 has a driving means (not shown). The sandwich 12 placed on the conveyor belt 22 at predetermined intervals is continuously conveyed toward the stretched portion of the belt-shaped film F by being driven by. The conveyor belt 22 includes the sandwich 12
Is placed with its bottom surface (the surface located between both inclined surfaces) facing the film extending section.

(Regarding the pushing plate) First guide rods 24, 24 (only one is shown) are arranged on both sides of the machine frame 14 sandwiching the supply conveyor 16, and each guide rod 24 has a first guide rod 24, 24. One slide block 26 is slidably arranged. Each first slide block 26
Is a guide rod 24 by an appropriate driving means (not shown).
Configured to reciprocate along. Further, the first guide rods 24, 2 are provided between the first slide blocks 26, 26.
Second guide rods 25, 25 orthogonal to 4 are installed,
A pair of second slide blocks 27, 27 (only one of which is shown) is slidably disposed on the guide rods 25, 25 with the supply conveyor 16 interposed therebetween. In each of the second slide blocks 27, a pushing plate 28 that faces above the conveyor belt 22 is provided via a bracket 30 so that the pushing plate 28 can move toward and away from the other pushing plate 28. The pushing plate 28 is formed in a shape that abuts along the inclined surface of the sandwich 12 placed on the conveyor belt 22. That is, when the sandwich 12 conveyed by the conveyor belt 22 is timed at a timing detected by an appropriate detection means (not shown) and both the second slide blocks 27, 27 are urged in a required direction, they face each other. The pushing plates 28, 28 are brought into contact with the corresponding inclined surfaces of the sandwich 12 in close proximity to each other. Then, the first slide block 2 is slightly faster than the conveyor belt 22.
6, 26 is moved toward the downstream side along the guide rods 24, 24 so that the sandwich 12 is supplied toward the stretched portion of the belt-shaped film F by the conveyor belt 22 and the pushing plates 28, 28. . The first slide block 26 and the second slide block 27 are
It is driven by a drive source of the apparatus main body through a required mechanism.

(Regarding the band-shaped film supply mechanism) A support frame 32 is provided upright on the machine frame 14, and a roll holder 34 is provided on the support frame 32 so as to face above the supply conveyor 16 as shown in FIG. The cantilever is rotatably arranged. A film roll 36, around which a transparent strip-shaped film F having a required width dimension is wound, is removably mounted on the roll holder 34. The support frame 32 includes
A pair of upper and lower pull-out rollers 38, 38 is rotatably arranged, and one of the pull-out rollers 38 is rotatably driven by a first brake-equipped motor 40 in the strip-shaped film F sandwiched by the rollers 38, 38. As a result, the film roll 36 is pulled out. In addition, the drawer roller 3
The strip-shaped film F pulled out by the rollers 8, 38 passes through the plurality of guide rollers 42 and the first tension roller 44 arranged on the support frame 32, and then the supply conveyor 16
It is supplied from the upper side to the lower side so as to be orthogonal to the transport direction on the downstream side. The roll holder 34 is designed so that when the belt-shaped film F is pulled out, braking is applied to the free rotation by a braking means (not shown) so that the film F is not pulled out excessively.

The first tension roller 44 is shown in FIG.
As shown in FIG. 3, the support plate 32 is rotatably supported by the tip of a holding plate 48 that is tiltably disposed via a support shaft 46. A balancer (not shown) is arranged on the support shaft 46, and the holding plate 48 is always held at the lower origin position (see FIG. 6) of the first tension roller 44, and when the strip-shaped film F is drawn out. Is the tension roller 4
It is set to allow a rise of 4 (see FIG. 7). The balancer functions to prevent the strip-shaped film F from being damaged when the sandwich 12 is pressed against the strip-shaped film F by allowing the strip-shaped film F to be pulled out with a slight force. Further, a disc 50 having one notch recess is rotatably arranged on the support shaft 46, and a sensor 52 capable of detecting the notch recess is provided with a sensor 52.
It is arranged in. This sensor 52 is sandwich 1
When the first tension roller 44 is raised from the original position to the required position by pressing 2 on the strip-shaped film F in the stretched state and pulling the film F, the notch concave portion of the disk 50 is detected and The first brake motor 40 is set to start. Further, when the sensor 52 no longer detects the cutout recess due to the first tension roller 44 descending from the required position, the first
The motor 40 with brake is controlled to stop.
When the first motor 40 with brake is stopped, the pulling roller 38 is braked by the brake of the motor 40.

The band-shaped film F is subjected to a required printing 54 (characters of "sandwich" shown in FIG. 12) at predetermined intervals in the drawing direction, and when the sandwich 12 is wrapped with the film F, the printing 54 is performed. Can be positioned at a predetermined position on the bottom surface of the sandwich 12, for example. Further, at one edge of the strip-shaped film F, print positioning marks (hereinafter referred to as "registration marks") 56 are provided at predetermined intervals in the drawing direction with the print 54 sandwiched therebetween. The print 54 can always be positioned at the same position of the sandwich 12 by stopping and controlling the second motor 64 with a brake, which will also be described later, at the timing when the registration mark 56 detects the registration mark 56. It is like this. In addition, cash register mark 5
The interval of 6 is set to be larger than the outer peripheral length of the sandwich 12 having the maximum outer peripheral length that is wrapped by the film F, and the outer peripheral length of one kind of strip-shaped film F having a constant interval of the print 54 is used. Sandwich 12
(See FIG. 14).

(Regarding the winding mechanism of the belt-shaped film) A film winding body 60 is rotatably supported at a position facing the lower side of the supply conveyor 16 in the machine frame 14 and is supplied to the downstream side of the supply conveyor 16. The strip-shaped film F includes a pair of rewinding rollers 6 which are rotationally driven by a second tension roller 62 and a second motor 64 with a brake.
It is wound around the film winding body 60 via 6, 66 and held in a stretched state on the downstream side of the supply conveyor 16. The second brake-equipped motor 64 is driven at the rotation start timing (a required timing after the melt-sealing of the strip film F by the sealing mechanism 67 described later) input from the control means 99 described later, and the registration mark sensor 58 is also provided. Is set so that stop control is performed by the mark detection. When the second motor 64 with a brake is stopped, the winding roller 66 is braked by the brake of the motor 64. As shown in FIG. 2, the film winding body 60 is connected to a drive system 68 of the packaging machine 10 via slip means 70, and the belt-shaped film F is rewound by the rotation of the rewinding rollers 66, 66. If there is, the film winding body 60 is driven by the drive system 6
When the film F is wound by being rotated by 8, the rewinding rollers 66, 66 are stopped and the belt-shaped film F is stretched between the rollers 66, 66 and the winding body 60. Is set so that the winding body 60 does not wind the film F by slipping with respect to the drive system 68 via the slip means 70.

The second tension roller 62 is shown in FIG.
As shown in FIG. 1, the first arm portion 74 a of the L-shaped holding plate 74 that is tiltably disposed on the machine frame 14 via the support shaft 72.
It is rotatably supported at the tip of (horizontal portion shown by the solid line in FIG. 1). Further, a balancer 76 is arranged on the support shaft 72, and the holding plate 74 always holds the second tension roller 62 at a lower fixed position (see FIG. 6).
When the belt-shaped film F is pulled out, the roller 62 is set to be allowed to rise (see FIG. 7). This balancer 76, like the balancer provided in association with the first tension roller 44 described above, causes the strip-shaped film F to be pulled out by a slight force, and when the sandwich 12 is pressed against the strip-shaped film F. , Which functions to prevent the sandwich 12 from being damaged. The amount of the strip film F stored between the rewinding rollers 66 and 66 by the second tension roller 62 facing the fixed position is
It is set to be longer than 1/2 of the outer peripheral length of the sandwich 12. Further, an air cylinder 78 is horizontally arranged in the machine frame 14 in the vicinity of the position where the holding plate 74 is arranged, and the piston rod 78a of the cylinder 78 is connected to the second arm portion 74b of the holding plate 74 (see the solid line in FIG. 1). It is positioned so that it can come into contact with the (vertical portion) indicated by. That is, the strip film F
When the air cylinder 78 is urged and the piston rod 78a is extended at a required timing after the seal is melted and sealed by the seal mechanism 67, as shown in FIG. 9, the holding plate 74 tilts to move the second tension roller. 62 is forcibly lowered to a fixed position below. The forced lowering of the second tension roller 62 by the air cylinder 78 is set to be completed before the rewinding of the strip film F by the rewinding rollers 66, 66 is completed.
Further, the forced lowering of the second tension roller 62 is set so as to slowly descend as shown in FIG. 5, and the registration mark 5 due to the belt-shaped film F being pulled suddenly.
6 is configured to prevent displacement.

The start timing of the forcible lowering of the second tension roller 62 by the air cylinder 78 may be after the fusing and sealing by the sealing mechanism 67, and as shown in FIG. It can be set at the same time as the rotation start timing, or at a timing earlier or later than this rotation start timing. Further, the piston rod 78a of the air cylinder 78 has a timing slightly before the time when the second tension roller 62 starts to rise as the sandwich 12 comes into contact with the strip-shaped film F and the film F is pulled out. It is set to be pulled into the barrel.
The piston rod 78a may be retracted at any timing other than the above timing as long as it is after the rotation of the rewinding rollers 66, 66 is stopped and before the next sandwich 12 is pressed against the strip film F. Can be set.

(Regarding Registration Mark Sensor) A registration mark sensor 58 for detecting the registration mark 56 provided on the belt-shaped film F is disposed on the film drawing path above the supply conveyor 16 so that the position can be adjusted. That is, as shown in FIGS. 3 and 4, a mounting plate 80 is bolted to the support frame 32, and a vertical guide 81 is vertically provided on the mounting plate 80. The first guide 8 is attached to the vertical guide 81.
2 is arranged so as to be adjustable up and down, and the first support body 82 is configured to be movable up and down with respect to the guide 81 by loosening the clamp lever 83. In addition, the first support 82
Is provided with a horizontal guide 84 that horizontally extends toward the stretched portion of the strip-shaped film F, and a second support 85 is horizontally adjustable in the horizontal guide 84. The second support 85 can be moved with respect to the horizontal guide 84 by loosening the knob 86 shown in the figure. A guide plate 87 and a support plate 88 are disposed on the second support body 85 so as to be separated from each other in the thickness direction of the strip film F so as to face each other, and the registration mark 56 in the strip film F is provided between the two plates 87 and 88. Is set so that the edge portion provided with is passed. And the support plate 8
The registration mark sensor 58 arranged on the both sides of both plates 87,
The registration mark 56 of the strip-shaped film F passing between 88 is detected.

By the mark detection of the registration mark sensor 58, the motor 64 with the second brake is stopped and controlled, and the rewinding of the strip film F by the rewinding rollers 66, 66 is set to be stopped. (See Figure 5). That is, the sandwich 12 is pressed against the band-shaped film F, the film F is wound around the peripheral surface thereof, and the band-shaped film F is fused and sealed at the upstream side in the transport direction of the sandwich 12 (the rear part in the supply direction), and then the second film When the registration mark sensor 58 detects the registration mark 56 while the film rewinding rollers 66, 66 are rotating to rewind the film when the motor 64 with brake starts rotating, the motor 64 is rotated. It is set to stop and rewind the film. As a result, the band-shaped film F is spread on the downstream side of the supply conveyor 16 in a state where the fusion-sealed seal part f and the registration mark 56 of the band-shaped film F are moved to a position where they will not be used for the next sandwich 12 packaging. As a result, the sandwich 12 can have a packaging form in which one seal portion faces the outer peripheral surface.

(Regarding Sealing Mechanism of Strip Film) A sealing mechanism 67 for sealing the strip film F wound around the peripheral surface of the sandwich 12 by fusion cutting is provided further downstream of the stretched portion of the strip film F. There is. As shown in FIG. 1, the sealing mechanism 67 includes a pair of upper and lower fusing sealers 89, 90 which are heated by an appropriate heater incorporated therein.
Both fusing sealers 89, 90 are configured to be able to approach and separate from each other by appropriate means. Then, the sandwich 1 conveyed by the supply conveyor 16
When the two sealers 89, 90 come close to each other at a proper timing when 2 is pushed by the pushing plates 28, 28 to a position beyond the film stretched portion, the strip-shaped film F is provided on the upstream side of the sandwich 12 in the feeding direction. It is configured so as to be fused and sealed at a position of approximately ½ in the thickness direction (see FIG. 8). In addition, both sealers 89,
As shown in FIG.
As shown in FIG. 1, guides 91, 91 are provided, and the film F is sandwiched between the vertically facing guides 91, 91 when the seals are fused and sealed by the sealers 89, 90. The guides 91, 91 on the lower fusing sealer 90 side
Is configured to be elastic by a spring. Further, a guide roller 92 is arranged at a position higher than the upper end of the sandwich 11 on the upstream side of the stretched portion of the strip-shaped film F, and the strip-shaped film F pulled out by the sandwich 12 pushed by the pushing plates 28, 28 is pulled out. The upper fusing sealer 89 is guided to the downstream side without being brought into contact with the upper fusing sealer 89. The film F supplied from below the supply conveyor 16 is guided by the guide 91 of the lower fusing sealer 90. Further, in FIG. 11, reference numeral 98
Shows a guide body that prevents the strip-shaped film F held in the stretched state from coming into contact with the supply conveyor 16.

The sandwich 12 is pushed down to a position beyond the film stretched portion by the pushing plates 28, 28 on the downstream side of the position where the fusing sealers 89, 90 are arranged.
A bed 93 is horizontally supported. The sandwich 12 placed on the bed 93 is transferred to the downstream side while being gripped by a gripping means (not shown).

(Regarding Control Device for Timing of Starting Rewinding Roller or Rotational Speed (Rewinding Speed)) FIG.
FIG. 4 is a control block diagram of the film printing alignment device, in which the rotation start timing or rotation speed of the rewinding rollers 66, 66 is determined by the sandwich 12 having various outer dimensions.
The changeover switch 100 for selecting each data stored and set in the control means 99 is connected to the control means 99 for storing and setting each. Further, the control means 99 includes a second brake motor 6 for rotating and driving the rewinding rollers 66, 66.
4 is connected, and the motor 64 is configured to be operated and controlled by a rotation start signal or a rotation speed control signal output from the control means 99 based on the stored data selected by the changeover switch 100. The changeover switch 100 is adapted to select a code number or the like attached to each data stored in the control means 99. Further, the setting input of each rotation start timing (film rewind timing) of the rewind rollers 66, 66 is, for example, a start time delay setting in a timer based on the set pulse number at the rewind start time in one cycle, Alternatively, it can be performed by changing the setting pulse number at the start of rewinding.

The data of the rotation start timing or the rotation speed stored in the control means 99 in advance is selected by the changeover switch 100, and also by a data input means (not shown) equipped with a ten-key pad and various condition setting keys. Product name, external dimensions for that product (for example, in the case of a triangular sandwich, the triangular shape in user units is a substantially specified dimension, so only the width of the sandwich that is the factor that changes the outer peripheral length (height direction in the figure ) Is set), the control means 99 calculates the optimum rotation start timing or rotation speed based on the input data, and the second brake is calculated based on the calculated data. A rotation start signal may be transmitted to the attached motor 64.

Here, the revolving speed of the rewinding rollers 66, 66 is set in advance with respect to the one having the maximum external dimensions among the sandwiches to be packaged (the number of revolutions of the packaging per predetermined time). When the rotation start timing is fixedly set to the reference speed and the rotation start timing is set to the fixed timing set for the maximum external dimension signed switch 12, the following problems occur. That is, in order to prevent damage to a flexible package such as the sandwich 12, the tension rollers 44 and 62 are actuated with a slight pulling force to allow the band-shaped film F to be pulled out. Is set to a high speed, the rewinding roller 6 is detected by the mark detected by the registration mark sensor 58.
Due to the time lag from the generation of the rotation stop signal of 6, 66 to the stop of the rollers 66, 66 and the inertia of the rewinding rollers 66, 66 at the time of stop, the stop position after the registration mark detection becomes unstable, and the print position Variation occurs.
As described above, it is difficult to always set the rotation speeds and the rotation start timings of the rewinding rollers 66, 66 to be constant regardless of the change in the outer dimensions of the sandwich 12. Therefore, the outer dimensions of the sandwich 12 are controlled by the control device. It is recommended to correspondingly change the rotation speed or the rotation start timing when changing the above. And
The most preferable control is to change the setting of the rotation start timing of the rewinding rollers 66, 66 which are set so as to be rotationally driven at the minimum necessary constant speed, according to different outer dimensions of the sandwich 12. According to this,
Since the rewinding rollers 66, 66 are rotating at a low speed, the stop position after the registration mark is detected is stable, and good print positioning can be achieved. The rotation speeds of the rewinding rollers 66, 66 can be changed according to different outer dimensions of the sandwich 12.

[0028]

Operation of the Embodiment Next, the operation of the packaging apparatus according to the embodiment will be described. It is assumed that the strip-shaped film F is stretched on the downstream side of the supply conveyor 16 as shown in FIG. Further, the print 54 applied to the strip film F is positioned so as to face a fixed position on the bottom surface of the sandwich 12.
(See FIG. 14 (a)).

In this state, the sandwich 12 is placed on the supply conveyor 16, and when the detection means detects that the sandwich 12 has been conveyed to a predetermined position by the supply conveyor 16, the first slide blocks 26, 2
6, the pushing plates 28, 28 move closer to each other, and the pushing plates 28, 28 are brought into contact with both inclined surfaces of the sandwich 12 being conveyed by the supply conveyor 16. And, at a slightly higher speed than the supply conveyor 16, both first
By moving the slide blocks 26, 26 along the guide rods 24, 24 to the downstream side, the sandwich 12
Is supplied toward the stretched portion of the strip film F.

As shown in FIGS. 7 and 11 (a), the stretched strip-shaped film F is pushed downward by the strip-shaped film F as the sandwich 12 is moved forward, whereby the upper and lower tension rollers are pushed. The films F are pulled out by moving 44 and 62 upward. When the first tension roller 44 is raised to the required position, the first brake motor 40 causes the pull-out rollers 38, 38 to move.
Rotates, and the required amount of strip-shaped film F is pulled out from the film roll 36. That is, from the upper and lower sides of the supply conveyor 16, approximately 1/2 of the outer peripheral length of the sandwich 12 is obtained.
The strip-shaped film F is drawn out in the respective amounts, and the strip-shaped film F is wound around the peripheral surface (upper and lower surfaces on the supply conveyor) of the sandwich 12. Therefore, when the strip-shaped film F is pulled out by the sandwich 12, the sandwich 12 and the strip-shaped film F do not rub against each other, and the damage can be prevented. Then, as shown in FIGS. 8 and 11 (b),
At the timing when the sandwich 12 arrives at the bed 93 and is intermittently stopped, the upper and lower fusing sealers 89, 90 move closer to each other, and the strip-shaped film F wrapped around the sandwich 12 is moved to the rear side of the sandwich 12. The fusing sealers 89, 90 contact each other at approximately the center in the thickness direction (vertical direction in the drawing) to provide a fusing seal. As a result, as shown in FIG. 12, the sandwich 12 is wrapped with a film having a fusing seal line (sealing portion) formed at a substantially central portion in the thickness direction. On the bottom surface of the sandwich 12 wrapped with a film, the printed 5
4 is located. When the required amount of the strip-shaped film F is pulled out from the film roll 36 and the first tension roller 44 is lowered from the required position, the brake motor 40 is stopped and the pull-out of the strip-shaped film F is stopped. . Further, the pushing plates 28, 28 are separated from each other at an appropriate timing when the fusing sealers 89, 90 are separated from each other, and move backward to the initial position to wait for the arrival of the next sandwich 12.

Here, at a proper timing after the fusing sealers 89 and 90 are separated from each other, the control means 99 is provided.
The rewinding rollers 66, 66 are rotationally driven by the second motor 64 with a brake based on the rotation start signal input from the two rollers 91, 90.
Looseness of the film caused by being sandwiched between 91
The strip-shaped film F including the film (see FIG. 11C) is rewound to the lower side, and the excess film is wound up on the film winding body 60. Further, as shown in FIG. 9, the air cylinder 78 is urged to extend the pistol rod 78a,
The second tension roller 62 is forcibly lowered to a fixed position below. The second tension roller 62
Of the rewinding rollers 66, 6
The rewinding by 6 is completed before the piston rod 78a of the air cylinder 78 is contacted by the next sandwich 12 with the strip-shaped film F.
This state is maintained until a timing slightly before the time when the second tension roller 62 starts to rise as the sheet is pulled out. Further, when the strip-shaped film F is rewound downward, the first tension roller 44 moves up to a required position and the sensor 52 detects this, and the first brake motor 40 causes the pair of pull-out rollers 38, 38 rotates, and the strip-shaped film F is pulled out from the film roll 36.

When the registration mark sensor 58 provided on the drawing path of the strip-shaped film F detects the registration mark 56 provided on the film F, the second brake motor 64 stops and the strip-shaped film F is stopped. Winding is completed
(See FIGS. 5 and 10). At this time, the print 54 applied to the strip-shaped film F is positioned so as to face the fixed position of the bottom surface of the next sandwich 12, and the seal portion f and the preceding portion attached to the strip-shaped film F by the fusing seal by the sealing mechanism 67. The registration mark 56 is moved to a lower position where it will not be used for the next packaging (see FIG. 11D).
After the rewinding rollers 66, 66 are stopped, the strip-shaped film F is pulled out by the pull-out rollers 38, 38 and the first tension roller 44 is lowered from the required position.
The sensor 52 no longer detects the cutout concave portion of the disk 50, the motor 64 with the first brake stops, and the film drawing stops. As a result, the strip-shaped film F for the next packaging is stretched and held between the upper and lower tension rollers 44 and 62. Therefore, even in the sandwich 12 to be packaged next, the print 54 is printed on the bottom surface.
Is located and the seal part is formed only in one place,
In addition, the package has a high commercial value without the registration mark 56.

Next, when the thickness dimension (peripheral length) changes due to a change in the number of stacked sandwiches 12 or the like, the position of the registration mark sensor 58 is adjusted in the drawing direction (vertical direction) of the strip film F. . For example, if the outer circumference of the sandwich 12 is increased by changing the order,
As shown in FIG. 4 (b), the position of the registration mark sensor 58 is moved to a position higher than the position (FIG. 14 (a)) where the outer circumference is short. As a result, the print 54 at the time when the sensor 58 detects the registration mark 56 is changed to the sandwich 1 of the new order.
It can be made to face a position that can be positioned at a fixed position on the bottom surface of 2. Further, since the interval between the registration marks 56 is set to be larger than the maximum outer peripheral length of the sandwich 12 to be wrapped with the band-shaped film F as described above, the seal portion f attached to the band-shaped film F and the preceding registration mark 56 are , It will face the lower position that is not used for the next packaging. Therefore, if the sandwich 12 is wrapped in this state in the same manner as described above, the print 54 can be positioned at a fixed position on the bottom surface of the sandwich 12 having different thickness dimensions as shown in FIG. Also in this package, the registration mark 56 does not exist. By selecting the code number according to the outer peripheral length of the sandwich 12 after the change by the changeover switch 100, the rewinding rollers 66, 66 are rotated at the optimum rotation start timing and rotation speed for the sandwich 12. .

As described above, the change in the outer peripheral length of the sandwich 12 can be dealt with only by adjusting the position of the registration mark sensor 58, and a plurality of kinds of strip-shaped films F having different intervals of the printing 54 can be provided. It is not necessary to prepare, the replacement work can be omitted, and the storage management can be simplified. Further, by changing the rotation start timing or the rotation speed of the rewinding rollers 66, 66 according to the outer peripheral length of the sandwich 12, the cycle time can be shortened and the manufacturing efficiency can be improved. That is,
When the sandwich 12 having a long outer peripheral length is to be packaged, the seal portion f generated by the previous packaging and the preceding registration mark 56.
In order to prevent the strip-shaped film F from being used for the next packaging, it is necessary to rewind the strip-shaped film F downward by a longer amount than when the sandwich 12 having a short outer peripheral length is packaged. The rotation of the rewinding rollers 66, 66 is started at an early timing after the fusing and sealing are performed, or the rotation speed of the rollers 66, 66 is set high. As a result, it becomes possible to rewind the strip-shaped film F in a short time so that the seal portion f and the registration mark 56 are exposed at a predetermined position, and it is necessary for the registration mark sensor 58 to detect the subsequent registration mark 56. The time can be shortened.

If the width of the strip-shaped film F is changed, the second support 85 having the registration mark sensor 58 can be moved and adjusted along the horizontal guide 84.

(Regarding Modifications) In the embodiment, the case where the position adjustment of the registration mark sensor 58 is manually performed has been described, but it is also possible to use the adjustment motor 94 as shown in FIG. That is, the mounting plate 80
A screw shaft 95 is rotatably supported by the nut, and a nut is attached to a portion of the screw shaft 95 that hangs downward from a mounting plate 80.
A first support body 82 is arranged via (not shown).
Further, a bevel gear 96 provided on the adjusting motor 94 is configured to mesh with a bevel gear 96 provided on the upper end of the screw shaft 95. That is, by driving the adjustment motor 94 forward and backward, the first support body 82 moves up and down under the meshing action of the nut and the screw shaft 95, and the position of the registration mark sensor 58 is adjusted. In this modification, the controller of the packaging machine 10 is
The position data of the registration mark sensor 58 corresponding to the outer peripheral length of various sandwiches 12 is input to (not shown),
When changing the order, the position of the sensor 58 can be automatically adjusted by operating the setting change switch.

In the wrapping machine of the embodiment, the case where the triangular sandwich is wrapped in a cylinder is described, but the present application is not limited to this, and the present invention is not limited to the soft sandwich. Of course you can get it.
Further, in the embodiment, the article to be packaged is supplied toward the strip-shaped film stretched vertically from the upper side to the lower side, but the present application is not limited to this, and traverses the supply path of the article to be packaged. It is also possible to supply the object to be packaged to the stretched strip-shaped film from the left-right direction. The interval between the registration marks provided on the strip-shaped film used in the packaging machine of the example is preferably set to be larger than the outer peripheral length of the sandwich as described in the example. It is also possible to employ a film in which the registration marks are provided at intervals shorter than the outer peripheral length of the sandwich, and the registration marks are present in the film in which the sandwich 12 is wrapped.

[0038]

As described above, according to the film printing alignment apparatus of the packaging machine of the present invention, the film having the outer peripheral length is drawn out from both sides sandwiching the feeding direction as the packaged article advances. The film and the object to be packaged do not rub against each other, and even if the object to be packaged easily loses its shape, good packaging can be performed without damaging the object to be packaged. Also, since the film is rewound in advance to a position where the seal part attached to the film does not remain on the outer peripheral surface of the packaged object to be packaged next, a package having one seal part is obtained and the commercial value is increased. be able to.

By making the interval of the print marks provided on the film larger than the maximum perimeter of the plurality of types of articles to be packaged by the film, a plurality of types of articles having different perimeters can be packaged. However, it is possible to always keep the printing position constant by using one type of printing film. Further, since the seal portion and the print mark can be prevented from remaining on the outer peripheral surface of the packaged article to be packaged next, the commercial value can be enhanced. Further, the rotation start timing or the rotation speed of the rewinding roller can be changed for different outer peripheral lengths of the packaged object, and the position of the mark sensor can be adjusted by the driving means, whereby automation can be achieved and the cycle time can be reduced. It can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram illustrating an entire packaging machine according to an embodiment.

FIG. 2 is a front view of a main part showing a film winding body.

FIG. 3 is a side view of an essential part showing a disposition part of a registration mark sensor.

FIG. 4 is a front view of a main portion showing a disposition portion of a registration mark sensor.

FIG. 5 is a timing chart of main parts of the packaging machine.

FIG. 6 is an explanatory diagram showing a process of winding a strip-shaped film around a sandwich.

FIG. 7 is an explanatory view showing a process of winding a band-shaped film around a sandwich.

FIG. 8 is an explanatory diagram showing a process of body-wrapping a band-shaped film on a sandwich.

FIG. 9 is an explanatory diagram showing a process of winding a band-shaped film around a sandwich.

FIG. 10 is an explanatory diagram showing a process of winding a band-shaped film around a sandwich.

FIG. 11 is an explanatory view of the essential part showing the step of body-wrapping a band-shaped film around a sandwich.

FIG. 12 is a schematic perspective view showing a body-wound sandwich.

FIG. 13 is a schematic perspective view showing another example of a body-wound sandwich.

FIG. 14 is an explanatory diagram for adjusting the registration mark sensor for sandwiches having different outer peripheral lengths.

FIG. 15 is a principal part explanatory view showing another example of the adjustment mechanism of the registration mark sensor.

FIG. 16 is a control block diagram of a film printing alignment device.

[Explanation of symbols]

 12 Sandwich (Item to be Packaged) 36 Film Roll (Supply Source) 38 Film Draw Roller 44 First Tension Roller 56 Registration Mark (Print Mark) 58 Registration Mark Sensor (Mark Sensor) 60 Film Winding Body 62 Film Rewinding Roller 64 Second motor with brake (driving motor) 67 Sealing mechanism 78 Air cylinder (biasing means) 94 Adjusting motor (driving means) 99 Control means 100 Changeover switch (changing means) F Band-shaped film f Sealing section

Claims (4)

[Claims] 1. An article to be packaged (12) directed toward a film (F) stretched in a direction orthogonal to a supply direction of the article to be packaged (12).
The film (F) is wound around the peripheral surface of the article to be packaged (12) by pushing, and the film (F) is fused and sealed by the sealing mechanism (67) at the rear side in the supply direction of the article to be packaged (12). A wrapping machine, in which a supply source (36) for the film (F) and a tension for applying tension to the film (F) to be stretched are provided on one side of the supply path for the article to be packaged (12). Rotation when the first tension roller (44) moves to a required position as the tension roller (44) and the stretched film (F) are wound around the peripheral surface of the object to be packaged (12). And a pair of film drawing rollers (3) for drawing the film (F) from the supply source (36).
(8, 38) and, along with the film drawing path from the supply source (36), a mark sensor (56) for detecting print marks (56) provided at predetermined intervals in the drawing direction of the film (F) ( 58), film (F)
Of the second tension roller (62) for applying a tension to the film (F) to be stretched, on the other side of which the supply path of the article to be packaged (12) is sandwiched, the position of which is adjustable in the pull-out direction. The sealing mechanism (67) is rotated at a required timing after fusing and sealing, and the sealing portion (f) remaining in the film (F) is not left on the outer peripheral surface of the packaged object (12) to be wrapped next. The film (F) is rewound, and a pair of rewinding rollers (66, 6) are stopped to rotate by the mark detection of the mark sensor (58).
6) and the second tension roller () before the rewinding of the film (F) in the rewinding rollers (66, 66) is urged at a required timing after the fusing and sealing by the sealing mechanism (67). Biasing means (78) for forcibly moving (62) to a predetermined position
And a winding body (60) for winding the surplus film rewound by the rewinding rollers (66, 66) in a roll shape. 2. An object to be packaged (12) directed toward a film (F) stretched in a direction orthogonal to a supply direction of the object to be packaged (12).
The film (F) is wound around the peripheral surface of the article to be packaged (12) by pushing, and the film (F) is fused and sealed by the sealing mechanism (67) at the rear side in the supply direction of the article to be packaged (12). A wrapping machine, in which a supply source (36) for the film (F) and a tension for applying tension to the film (F) to be stretched are provided on one side of the supply path for the article to be packaged (12). Rotation when the first tension roller (44) moves to a required position as the tension roller (44) and the stretched film (F) are wound around the peripheral surface of the object to be packaged (12). And a pair of film drawing rollers (3) for drawing the film (F) from the supply source (36).
8,38) and, on the film withdrawal path from the supply source (36), a distance larger than the maximum outer peripheral length of the plurality of types of the article to be packaged (12) to be packaged by the film (F) (12). The mark sensor (58) for detecting the print mark (56) provided on the film (F) is arranged so that the position can be adjusted in the drawing direction of the film (F), and the supply of the object to be packaged (12) is performed. On the other side of the path, a second tension roller (62) that applies tension to the stretched film (F), and the film (F) is rotated at a required timing after the fusing and sealing by the sealing mechanism (67). The sealed part (f) remaining in F) and the printed mark (56) to be packaged next (12)
The film (F) is rewound to a position where it does not remain on the outer peripheral surface of the film, and a pair of rewinding rollers (66, 66) are stopped by the mark detection of the mark sensor (58), and the fusing by the seal mechanism (67). The second tension roller (62) is forced to move to a predetermined position before the rewinding of the film (F) on the rewinding rollers (66, 66) by being urged at a required timing after sealing. Means (78)
And a winding body (60) for winding the surplus film rewound by the rewinding rollers (66, 66) in a roll shape. 3. An object to be packaged (12) directed toward a film (F) stretched in a direction orthogonal to a supply direction of the object to be packaged (12).
The film (F) is wound around the peripheral surface of the article to be packaged (12) by pushing, and the film (F) is fused and sealed by the sealing mechanism (67) at the rear side in the supply direction of the article to be packaged (12). A wrapping machine, in which a supply source (36) for the film (F) and a tension for applying tension to the film (F) to be stretched are provided on one side of the supply path for the article to be packaged (12). Rotation when the first tension roller (44) moves to a required position as the tension roller (44) and the stretched film (F) are wound around the peripheral surface of the object to be packaged (12). And a pair of film drawing rollers (3) for drawing the film (F) from the supply source (36).
8,38) and, on the film withdrawal path from the supply source (36), a distance larger than the maximum outer peripheral length of the plurality of types of the article to be packaged (12) to be packaged by the film (F) (12). The mark sensor (58) for detecting the print mark (56) provided on the film (F) is arranged so that the position can be adjusted in the drawing direction of the film (F), and the supply of the object to be packaged (12) is performed. On the other side of the path, a second tension roller (62) that applies tension to the stretched film (F), and the film (F) is rotated at a required timing after the fusing and sealing by the sealing mechanism (67). The sealed part (f) remaining in F) and the printed mark (56) to be packaged next (12)
The film (F) is rewound to a position where it does not remain on the outer peripheral surface of the film, and a pair of rewinding rollers (66, 66) are stopped by the mark detection of the mark sensor (58), and the fusing by the seal mechanism (67). The second tension roller (62) is forced to move to a predetermined position before the rewinding of the film (F) on the rewinding rollers (66, 66) by being urged at a required timing after sealing. Means (78)
And a winding body (60) for winding the excess film rewound by the rewinding rollers (66, 66) in a roll shape, and according to different outer dimensions of the article to be packaged (12). Change means (100) for changing the rotation start timing or rotation speed of the rewind roller (66, 66), and the rewind roller (66) based on the start timing or rotation speed changed by the change means (100). , 66) for generating a rotation start signal, and a drive motor for receiving the rotation start signal from the control means (99) and driving the rewinding rollers (66, 66) to rotate.
(64) A film printing alignment device for a packaging machine, comprising: 4. The film printing alignment device for a packaging machine according to claim 3, further comprising a driving means (94) for moving and adjusting the mark sensor (58) in a film drawing direction.