JPH0920312A - Wrapper - Google Patents

Abstract

PURPOSE: To provide a wrapper which, when a film drawn out and guided from a film original-roll runs out, satisfactorily switches from the final end of the film original-roll to a stand-by film original-roll while preventing film displacement. CONSTITUTION: A drawing-out part (vertical heat seal roll 5A) being a film feed part for drawing out and guiding a film F is provided on the machine base 1 of a wrapper. A pair of film guide rollers 13 and 13A are provided between the drawing-out part and a hold frame 2 for a film original-roll R and on a particular area of a carrying path for the film F. At least either the guide roller 13 or 13A was synchronized with the rotating drive of the drawing-out part serving as the film feed part, and also a brake device which resists the carrying the of turn guide roller 13A is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device for continuously transporting a film, which is wound in a roll form, by pulling out and transferring the film.

[0002]

2. Description of the Related Art Conventionally, as a packaging device of this type, as disclosed in, for example, Japanese Utility Model Laid-Open No. 1-170601,
It is known that the film which is continuously transferred is folded back, the folded edges of the film are overlapped and longitudinally sealed, the packaged object is filled in the vertically sealed film, and the film is laterally sealed. In the figure, reference numeral 1 is a machine base, a pair of holding frames 2 is provided on the side of the machine frame, and the film original fabric R in which the film F is wound around the holding frame 2 is detachable and replaceable. The film guide portion 3 and the film folding portion 4 are disposed on the upper portion of the machine base 1, and the vertical seal portion 5 and the horizontal seal portions 6 and 7 are connected to the front surface of the machine base 1 from the upper side. A cutter unit 8 for cutting the packaging bag P is provided respectively.

The film F is pulled out from the film roll R wound in a roll shape set on the holding frame 2, and led out to the film folding section 4 through the film guiding section 3 which is a guide roll, and the film folding section 4 is formed. The film F is folded in two along the longitudinal direction by the folding guide 9 provided in the longitudinal direction, and the pair of vertical heat-sealing rolls 5A of the vertical sealing portion 5 overlaps the folding both ends of the film F to heat-seal and send out. The longitudinally sealed portion FH of the longitudinally sealed film F is used to form the film F into a tubular shape, and the pair of lateral heat seal rolls 6A of the lateral sealing portion 6 are heat-sealed to the tubular film F in the lateral direction, The lateral sealing portion FS forms the bottom of the packaging bag P, and the filling nozzle 10 is used to fill, for example, Filled with packaged articles comprising a liquid such as scan, after Seibukuro the packaging bag P with lateral sealing by the lateral seat seal rolls 6A with more of the film F feed,
Again, the horizontal seal portion FS of the packaging bag P is connected to the second horizontal seal portion 7
Further pressure-sealed by the horizontal heat seal roll 7A of
The middle portion of the lateral sealing portion FS in which the packaging bag P is formed is cut by the operation of the cutter unit 8 and the separated packaging bag P is carried out via the carry-out mechanism.

By the way, the film F that is continuously transferred is
In this case, a pair of vertical heat seal rolls 5A facing each other of the vertical seal portion 5 which also serves as a film feeding portion is fed out and guided, but a predetermined tension is applied to the film F which is drawn out from the film original fabric R and guided. The film F is loosened between the original film R and the vertical seal portion 5 serving as a film feeding portion, and wrinkles are generated in the film F folded at the film folding portion 4, and the film F is displaced during heat sealing, Since there is a problem that wrinkles occur, it is common to use the original film R
The holding frame 2 which holds the film is configured to be lightly braked, whereby the film F drawn out and guided from the original film R is directed to the vertical seal part 5 side which also functions as a film feeding part with a predetermined tension. Supplied with.

Further, in the packaging device having the above-mentioned structure,
When the film roll R wound in a roll state is pulled out and becomes empty, the film roll R in the standby state is pulled out and pulled again to the film conveying path such as the film guiding section 3 and the film folding section 4. Since the work of rotating the film has to be performed, the wrapping work cannot be performed when the original film roll R is replaced, which causes a reduction in the work efficiency of the wrapping.

Therefore, in order to eliminate the complexity during the replenishment work of the original film roll R, for example, in Japanese Utility Model Publication 58-2
As disclosed in Japanese Patent No. 0491, etc., a film end detection device for detecting the end of the film, a film end R of the film F of the original film R in use, and a film of the original film R in standby which is a spare Equipped with a fusing device for fusing the leading end portion of F, each time the end of the film F is detected, the fusing device is operated by a detection signal from the film end detection device, so that the refilling work of the original film R can be performed efficiently. There is known a packaging device which can be carried out automatically.

[0007]

However, when the means for replenishing the original film R is applied to the above-mentioned packaging device, the tension of the film F in the film end detection device for detecting the end of the film F is That is, by detecting that the tension has disappeared, a detection signal is generated, and the end portion of the film F hung down by this signal is superposed on the start end portion of the waiting film F and the welding device is operated to heat seal the two films. While the superposed surface of F is welded and the film F can be automatically switched, the brake action on the side of the holding frame 2 that holds the original film R is cut off because the film F of the original film R is lost. , The film F positioned upstream of the vertical seal portion 5 on the film feeding portion side is loosened, and before the cutting by the cutter portion 8 occurs. Longitudinal sealing portion 5 and the lateral sealing portion 6 that,
A portion where the weight of the packaging bags P in a continuously connected state formed by 7 and 7 is sandwiched between a pair of opposed vertical heat seal rolls 5A of the vertical seal portion 5 which also serves as a film feeding portion. To concentrate on the film F from the position of the pair of vertical heat seal rolls 5A sandwiched between them.
May slide, and when the packaging device is operated after the film F is supplied, the lateral seal location FS is displaced. Therefore, the packaging bag P location hung away from the lateral seal location FS is moved by the cutter section 8. There is a problem in that the object to be packaged, which is a liquid such as a sauce, is contaminated by cutting and contaminating the cutter portion 8 and the downstream side thereof.

Therefore, the present invention has been made in view of the above-mentioned problems, and when the film original film is used up, the positional deviation of the film is prevented and the end portion of the film original film and the film original film on standby. It is an object of the present invention to provide a packaging device that can favorably switch from the opposite side.

[0009]

In order to achieve the above-mentioned object, the present invention provides a machine frame of a packaging apparatus with a holding frame for loading a film raw material wound in a roll shape, and guiding the film raw material from the film original fabric. In the packaging device configured to form a bag to be formed into a bag, heat-seal by a sealing mechanism to form a packaging bag for containing an object to be packaged, and to carry out the packaging bag by cutting out the packaging bag. A feeding unit that is a film feeding unit that guides the film is provided, and a guide roller for the film, which is located between the feeding unit and the holding frame of the film original, and which forms a pair on the way of transporting the film, is provided. At least one of the guide rollers is provided with a brake device that is synchronized with the rotational drive of the feeding unit that is the film feeding unit and that imparts resistance to the conveyance rotation of the guide roller. In the packaging apparatus according to. Further, the machine base is provided with an operation unit for variably adjusting the magnitude of resistance by the brake device. Further, the pair of guide rollers for the film is provided with an opening / closing mechanism for moving and setting so as to be able to come into contact with and separate from the guide rollers. A film end detection mechanism is provided between the holding frame and the film guide roller.

[0010]

When the original film of the film loaded in the holding frame is pulled out and guided and disappears, even if the end of the film becomes free and the tension of the film is cut off, the film will be between the pair of guide rollers. By maintaining the conveyance rotation of the guide roller with a predetermined resistance at the end portion of the sandwiched film by the brake device,
The tension on the upstream side of the feeding unit is not cut off, and thus the position shift of the film supported by the feeding unit can be prevented.

Further, since the magnitude of the resistance of the brake device can be variably adjusted by the operating portion, it can be arbitrarily set according to factors such as the width and pitch of the film or the weight of the object to be packaged, and a predetermined tension pressure can be set. It becomes possible to obtain.

[0012] Further, when the original film roll wound in the form of a roll is guided around, by keeping the gap between the pair of guide rollers in an open state, it is possible to easily carry out the winding work on the starting end side of the film.

Further, the film end detecting mechanism makes it possible to stop the film when the film runs out or to operate the film welding device to perform the replenishing work of the original film.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a packaging apparatus according to an embodiment of the present invention. In this embodiment, a filling and packaging machine will be described as an example.
In FIG. 6 and FIG. 6, a holding frame 2 is provided on the side of the machine base 1 of the filling and packaging machine, and a film original fabric R obtained by winding the film F in a roll shape is detachably loaded on the holding frame 2. The film guiding section 3 and the film folding section 4 are arranged on the upper part of the machine base 1, and the vertical seal part 5, the horizontal seal parts 6, 7 and the continuous packaging bag P are arranged on the front part of the machine base 1 from the upper side. Cutters 8 for cutting are respectively provided, the film F is pulled out from the original film roll R, is led out to the film folding part 4 through the film guiding part 3, and the folding guide 9 provided in the film folding part 4 is provided. Thus, the film F is folded in two along the longitudinal direction, and the pair of vertical heat-sealing rolls 5A of the vertical seal portion 5 are arranged so that the folded back edges of the film F are superposed and heat-sealed. Also it serves as a feeding portion which is a film feed unit for a pair of longitudinal heat seal rolls 5A of opposing longitudinal sealing portion 5 pull the film F guided in this embodiment.

The film F that is continuously transferred is heat-sealed and sent out by a pair of vertical heat-sealing rolls 5A that also serve as a feeding unit that serves as a film feeding unit, and then the longitudinally sealed portion F of the heat-sealed film F.
A film F is formed into a tubular shape by H, and is laterally heat-sealed to the tubular film F by a pair of horizontal heat-sealing rolls 6A facing each other at the horizontal sealing portion FS.
The bottom portion of the packaging bag P is formed by the filling bag 10, and the filling nozzle 10 fills the film F formed in a cylindrical shape with a bottom with a filling object made of a liquid such as a sauce. Heat seal roll 6A
After heat-sealing to form the packaging bag P, the lateral sealing portion FS of the packaging bag P is further pressure-sealed by the lateral heat-sealing roll 7A of the second lateral sealing portion 7 to form the packaging bag P. The intermediate portion of the transversely sealed portion FS is cut by the operation of the cutter unit 8, whereby the continuous packaging bag P is separated and the packaging bag P carried out from the carry-out mechanism is taken out by a conveyor or the like and conveyed. .

The film guide unit 3 is provided with a film guide roll 11 and a folding guide roll 12 on the upper side of the machine base 1, and a pair of guide rollers 13 and 13A for the film F are arranged on the way of transporting the film F. The film F is sandwiched between the paired guide rollers 13 and 13A and is fed out. In this embodiment, the guide roller 13A is rotated on the support shaft 14 of the other guide roller 13A. A brake device 15 is provided to apply resistance to the.

The brake device 15 employs a device capable of steplessly adjusting the magnitude of the resistance force by operating a switch on an operation panel 16 which is an operation unit attached to the exterior cover of the machine base 1 or the like. The braking force serving as the resistance force is configured such that a predetermined tension is applied to the film F with respect to the driving force of the vertical heat-sealing roll 5A serving as the feeding portion of the film F that is continuously transferred, and the film F can be conveyed.
Further, even when the rotation of the feeding unit (vertical heat seal roll 5A), which is the film feeding unit, is stopped, the guide rollers 13A act as a brake, and the guide rollers 13, 13A that try to inertially rotate due to inertia loosen the film F. The resistance is set so that it can be stopped immediately without any problem.

In this embodiment, the above-mentioned braking device 15 is a hysteresis type clutch (HC type clutch) in which the resistance force (braking force) can be variably adjusted according to the current amount by changing the current amount. Used as device 15.

The outline of this HC type clutch will be described. This clutch is composed of three members, a field, a rotor and a cup. The field containing the exciting coil is supported by the rotor via a ball bearing, and a cup on the output side is provided between the inner pole and the outer pole of the rotor. Magnetic poles are formed with a constant air gap and are supported by ball bearings.When the exciting coil is energized, a magnetic field is generated in the air gap between the inner and outer magnetic poles of the rotor,
The cup (permanent magnet material) placed in this air gap (magnetic field) is also magnetized, but since the polarity change of the permanent magnet material having the hysteresis characteristic lags behind the polarity change of the magnetic poles, the rotor and the cup are magnetically connected. Is.

Therefore, due to the constant torque property irrelevant to the slip speed and the wide range proportional characteristic of the current and the torque, accurate and easy torque control is easily performed, and the torque is transmitted by the electromagnetic force. A constant torque can always be reproduced by control, and the magnitude of the torque (resistance) applied in the reverse direction of the guide roller 13A is continuously variable by the current amount adjusting operation by the switch operation of the operation panel 16 serving as the operation section as described above. It can be adjusted and set accurately.

Further, in this embodiment, the one guide roller 13 is rotatably and fixedly attached to the machine base 1, and the other guide roller 13A is attached to the movable frame 17. Axis 18 attached to machine base 1 side
It is rotatably provided with respect to the base point, and the other guide roller 13A is urged toward the one guide roller 13 side by a tension spring 19 between the machine base 1 side and the movable frame 17.

Further, the film F is drawn out from the original film roll R and guided, and then the film guide portion 3 to the film folding portion 4
The cam plate so that the pair of guide rollers 13 and 13A can be opened to guide the film F around when the film F is pulled out.
20 is provided and the operation lever 21 attached to this cam plate 20
The cam plate 20 presses the end portion of the movable frame 17 by the rotation of, and the other guide roller 13A is separated from the one guide roller 13 against the force of the tension spring 19 with the pivot 18 as a fulcrum.
The film F can be easily set through this gap, and the film F can be easily pulled around. The film F is rotated between the guide rollers 13 and 13A by the return operation of the operation lever 21. The movable frame 17, the tension spring, the cam plate 20,
The operation lever 21 constitutes an opening / closing mechanism for the pair of guide rollers 13 and 13A.

Further, a film tension sensor 22 serving as a film end detection mechanism is provided on the way of the conveyance path of the film F between the pair of guide rollers 13 and 13A and the holding frame 2 into which the film original fabric R is loaded. The sensor 22 is arranged to operate when the film F of the original film R that has been pulled out and guided is lost. CH is a film switching mechanism.

Therefore, in this embodiment, the machine base 1 of the filling and packaging machine.
The film F of the original film R loaded in the holding frame 2 provided on the side of the film F is drawn out and guided, and when the film F guided and drawn out disappears, the end of the film F becomes free and becomes the film F. The film tension sensor 22 serving as a film end detection mechanism located upstream of the guide rolls 13 and 13A when the applied tension is released.
Is activated to stop the rotation drive of the vertical heat seal roll 5A of the vertical seal portion 5 which also serves as a feeding portion for pulling out and guiding the film F.

The film switching mechanism CH provided on the side of the machine base 1 is operated in conjunction with the stop operation of the vertical heat seal roll 5A based on the signal from the film tension sensor 22 to start the starting end portion of the original film roll R on standby. After heat-sealing or adhering the end of the film F and the end portion of the used film F, the filling and packaging machine is started again, and thereby the packaging bag P by the filling and packaging machine.
Is continuously packaged.

Further, even if the end of the film F becomes free and the tension of the film F is broken, the end portion of the film F sandwiched between the pair of guide rollers 13 and 13A is broken by the brake device 15. Since the film F is maintained, a standby state is maintained while maintaining a predetermined tension between the vertical heat-sealing roll 5A serving as the feeding portion of the film F and the guide rollers 13 and 13A to which the braking force is applied by the brake device 15. That is, since it is stopped, the above-mentioned replenishment work of the film F can be favorably performed,
Moreover, the brake device 15 can prevent the film F from slipping between the pair of vertical heat-sealing rolls 5A of the vertical seal portion 5 serving as the feeding portion of the film F, and after the film F is replenished, which is a conventional problem. When the filling and packaging machine is operated, the lateral seal location FS is displaced due to the displacement of the lateral seal location FS.
It is possible to solve the problem that the portion of the packaging bag P hung away from is cut by the cutter portion 8 and the cutter portion 8 and its downstream side are soiled.

The magnitude of the braking force applied by the braking device 15 is set infinitely by the switch operation of the operation panel 16 which is an operation unit attached to the exterior cover of the machine base 1 and the like. The braking force (tension pressure) can be adjusted to an appropriate condition by the difference in film width, film pitch, etc.
Depending on the case, the braking force may be automatically and stepwise set according to the setting mode such as film material, width, and pitch.

If the type of the film F is different, the original film R must be switched and loaded into the holding frame 2, and the film F must be pulled out and guided and set on the transport path of the film F. However, when setting the film F so as to be sandwiched between the pair of guide rollers 13 and 13A, the cam plate is operated by rotating the operation lever 21 against the force of the tension spring 19 constituting the opening / closing mechanism. 20
Presses the end of the movable frame 17 and attaches the movable frame 17.
The movable frame 17 rotates about the fulcrum 18, and the other guide roller 13A attached to the movable frame 17 separates from the one guide roller 13 to form a separated pair of guide rollers.
The film F can be easily fed between 13 and 13A to guide it around, and the guide levers 13 and 13A can be easily returned to the contact state by the return operation of the operation lever 21.

In the above-mentioned embodiment, the movable frame is rotatably provided by using the cam plate as the opening / closing mechanism for moving and setting the pair of guide rollers so that the pair of guide rollers can be moved in contact with each other. The guide roller may be openable / closable (contactable / separable), or may be a mechanism that reciprocates by meshing transmission including a rack and a pinion. Also, the mounting position of the pair of guide rollers may be appropriately selected depending on the form of the packaging device, the arrangement position of each component, and the like. As the packaging device, the filling and packaging machine is described as an example. It can also be applied to a packaging machine, a packaging machine using a stretch film, and the like.

[0030]

According to the present invention, the film that has been drawn out and guided from the original film is lost, the end of the film becomes free, and even if the tension of the film is broken, it is sandwiched between the pair of guide rollers. By maintaining the rotation of the guide roller with a predetermined resistance at the trailing end portion of the film by the brake device, it is possible to prevent the displacement of the film supported by the feeding portion, which is the drive transmission side of the film, in advance. Further, the magnitude of the resistance by the brake device can be arbitrarily and easily set by the operating portion, whereby the resistance can be arbitrarily set and predetermined according to factors such as the width and pitch of the film, the type of the film or the weight of the object to be packaged. It is possible to obtain the film tension pressure of, and when loading and drawing the film,
A pair of guide rollers can be moved and set by an opening / closing mechanism so that they can be brought into and out of contact with a simple operation, and when this is opened, the film can be fed to guide the film around, so that the workability can be improved. In addition to the configuration, by providing a film end detection mechanism on the film guide route between the loading position of the film original and the brake device, there is an effect that the film original replenishing work can be easily performed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a filling and packaging machine showing an embodiment of the present invention.

FIG. 2 is a front view of essential parts showing a guide roller and a brake device of the filling and packaging machine of FIG.

FIG. 3 is a front view of a main part showing an operating state of the guide roller of FIG.

FIG. 4 is a plan view showing a main part of FIG.

FIG. 5 is an overall configuration diagram showing a conventional filling and packaging machine.

FIG. 6 is a schematic view of a film showing a state in which the film is folded and heat-sealed in the conventional example and the example of the present invention.

[Explanation of symbols]

1 Machine stand 2 Holding frame 3 Film guide section 4 Film folding section 5 Vertical sealing section 5A Vertical heat-sealing roll (feeding section) 8 Cutter section 11 Film guiding roll 12 Film folding roll 13, 13A Guide roller 14 Spindle 15 Braking device 16 Operation panel (operation part) 17 Movable frame 18 Pivot 19 Tension spring 20 Cam plate 21 Operation lever 22 Film tension sensor (Film end detection mechanism) F Film P Packaging bag R Film original fabric

Claims (4)

[Claims] 1. A packaging frame is provided with a holding frame for loading a film raw material wound in a roll shape, a film drawn and guided from the film raw material is made into a bag, and heat-sealed by a sealing mechanism. Forming a packaging bag for containing the article to be packaged, in a packaging device configured to cut and carry out the packaging bag, the machine base is provided with a feeding unit that is a film feeding unit for guiding the film, Located between the feeding portion and the holding frame of the film original,
A pair of film guide rollers is provided on the way of the film transport path, and at least one of the guide rollers is synchronized with the rotational driving of the feeding unit that is the film feeding unit, and a resistance is imparted to the transport rotation of the guide roller. A packaging device having a brake device. 2. The packaging device according to claim 1, wherein the machine base is provided with an operation portion for variably adjusting the magnitude of resistance by the brake device. 3. The packaging apparatus according to claim 1, wherein the pair of guide rollers for the film is provided with an opening / closing mechanism for moving and setting so that the film can be contacted and separated. 4. The packaging apparatus according to claim 1, further comprising a film end detection mechanism provided between the holding frame and the film guide roller.