JP5580958B2 - Packaging film supply device for packaging machine and packaging machine - Google Patents

Description

  The present invention relates to a packaging film supply apparatus and a packaging machine for a packaging machine that continuously supplies a belt-shaped packaging film to a packaging machine body.

  There are various types of packaging machines. Usually, one or two strip-shaped packaging films are continuously supplied to the packaging machine main body, and the packaging machine main body processes the supplied packaging film appropriately to be packaged. The package is manufactured by sealing or cutting a predetermined position of the packaging film. A packaging film supply device for supplying a packaging machine film rotatably supports an original roll obtained by winding a strip of packaging film into a roll, and a plurality of strip-shaped packaging films continuously drawn from the original roll It is passed over the rollers of the sheet and conveyed by a desired path, and supplied to a desired position of the packaging machine body.

  For example, a PTP (Press Through Packaging) sheet is a packaging form in which the contents are pushed out from the container (pocket part) side to break the upper lid and the contents are taken out, and is often used for the packaging of tablets and capsules in pharmaceutical packaging. . A packaging machine for manufacturing this type of PTP package includes a transport device that transports a lower film made of resin, and a pocket portion that projects downward to a predetermined position of the lower film on a transport line of the transport device A molding device that molds the product, a packaged product supply device that supplies tablets to be packaged in the pockets molded by the molding device, and an upper film that covers the lower film supplied with the tablets Upper film supply device to be supplied (the above-mentioned packaging film supply device), a seal device for sealing a predetermined portion of the lower film and the upper film facing each other, a cutter device for cutting a predetermined position sealed by the seal device, etc. It has. The upper film is made of an aluminum film or the like. This type of PTP packaging machine is disclosed in, for example, Patent Documents 1 and 2.

JP 2005-41560 A JP 2007-261775 A

If there is winding unevenness in the original roll of the aluminum film itself, the tension of the upper film in the middle of conveyance may not be constant, and wrinkles may occur on the film. As a result, the upper film and the lower film cannot be brought into close contact with each other, resulting in generation of defective products. This wrinkle depends on the state of the film, so the occurrence cannot be predicted. In addition, in a PTP packaging machine, etc., when the pocket portion is molded, the upper film is also intermittently conveyed along with the temporary suspension of the lower film. Since the upper film tends to be slack, the tension may not be constant.

  Patent Documents 1 and 2 disclose a function of correcting the meandering of the film with respect to the lower film forming the pocket portion. In these patent documents, a sensor for detecting the position in the width direction of the lower film is provided, and the amount of positional deviation is obtained from the sensor output, and the amount of correction according to the obtained amount of positional deviation is calculated. Based on the above, a correction device (correction device) for correcting the meandering of the lower film installed on the lower film conveyance line is operated. As a result, it is possible to prevent the lower film from meandering and the tension from becoming constant.

  However, in the conventional PTP wrapping machine, a correction device is provided for the purpose of correcting the meandering of the lower film side forming the pocket portion, but the upper film tension is kept constant. No measures have been taken to prevent the occurrence of this. Moreover, if the same mechanism as that of the film meandering device is installed on the upper film transport line, the entire device becomes large. Furthermore, aside from which film transport line is installed, the conventional correction device calculates a correction amount based on the detection device that detects the amount of positional deviation and the detected amount of positional deviation so that the correction amount is obtained. Therefore, there is a problem in that a correction device controlled by the camera is required, the mechanism for correction becomes large, and if the correction amount is too large, the position shifts to the opposite side. Therefore, there is a problem that it is desired to make the tension of the film constant with a simple configuration.

In order to solve the above-described problems, the present invention provides (1) a packaging film supply device that supplies a belt-shaped packaging film to a packaging machine body, and a film tension adjusting device is provided on the carry-out side of the carry-out path of the packaging film. The film tension adjusting device includes a roller that contacts the packaging film from above and that rotates with the movement of the packaging film, and a support mechanism for the roller. It is assumed that the packaging film is configured to bias downward and to support the roller shaft so as to be tiltable in accordance with the inclination of the portion of the packaging film that is in contact therewith.

  The packaging film is unloaded from the outer periphery of the outer cylinder. When slack occurs in the packaging film, the roller (the outer cylinder in the embodiment) is inclined in accordance with the slack. Therefore, the weight of the outer cylinder is applied to the entire width of the packaging film, and the tension of the packaging film is constant. As a result, generation of wrinkles or the like on the packaging film is suppressed regardless of the material of the packaging film. That is, in the present invention, when the entire film is unevenly slackened or the like, the tension on the packaging film is made constant by making the outer cylinder in an appropriate posture instead of forcibly correcting it. . Since the inclination and direction of the outer cylinder change automatically according to the degree of slack, no special device such as a sensor that detects the amount of slack is required, and the tension is set with a simple, simple, and compact configuration. Can be constant.

In the above premise, the film tension adjusting device includes a support shaft arranged so as to cross the transport direction of the packaging film, and an outer cylinder serving as the roller rotatably attached to the support shaft, support mechanism, the larger the inner diameter of the outer cylinder than the outer diameter of the support shaft, the outer cylinder so that the axis direction of the outer cylinder and the axial direction of the support shaft intersect is configured to be inclined. This corresponds to the embodiment shown in FIGS.

Further, collars having through holes are attached to both ends of the outer cylinder, and the inner diameter of the through hole is smaller than the inner diameter of the outer cylinder and larger than the outer diameter of the support shaft. The inside of the hole was inserted and arranged . Regardless of the direction of inclination of the outer cylinder, the collar contacts the support shaft, so that the inner surface of the outer cylinder can be prevented from contacting the support shaft. As a result, for example, the support shaft and the outer cylinder are made of a strong material such as SUS, and the collar is made of resin, so that the contact portion between the collar and the support shaft can be suppressed as much as possible.

(2) A stopper member for restricting the axial movement of the outer cylinder may be provided on the outer side (one or both) of the support shaft in the axial direction. If it does in this way, it can control that an outer cylinder separates from a fixed axis with simple composition.

(3) The packaging film can be an aluminum film. The film material is not limited, but particularly in the case of an aluminum film, wrinkles are likely to occur unless the tension is constant, but the present invention can reliably prevent wrinkles.

(4) It is good to arrange | position the angle adjustment roller which contacts the said packaging film and changes the angle in the downstream of the said roller.

(5) The packaging machine of the present invention is a packaging for packaging an object to be packaged using the packaging film supply device according to any one of (1) to (4) and the packaging film supplied by the packaging film supply device. A packaging body is provided, and the packaging film is configured to be supplied to the packaging machine body by being stretched around the outer periphery of the roller.

(6) The packaging machine main body has a pocket portion protruding downward, and covers the upper film on the lower film supplied with the packaged material in the pocket portion, and the contact area between the lower film and the upper film. The packaging film supply device supplies the upper film, and the film tension adjusting device is disposed immediately before the sealing device for sealing the upper film and the lower film. Shall. The present invention corresponds to, for example, a PTP packaging machine. In addition to the large size of the pocket portion, the upper film material can also be applied to deep-drawing packaging using various resin films.

  In the present invention, since the outer cylinder is provided so as to be rotatable and tiltable with respect to the fixed shaft, the tension of the film can be made constant with a simple configuration.

It is a figure which shows suitable one Embodiment of this invention. It is a figure explaining an effect | action. It is a figure explaining an effect | action. It is a figure which shows a modification.

  FIG. 1 shows a preferred embodiment of a PTP packaging machine in which the packaging film supply apparatus of the present invention is incorporated. The packaging film supply apparatus of this embodiment is the upper film supply apparatus 1 which supplies the upper film which also becomes a cover film with respect to a PTP packaging machine.

  The upper film supply apparatus 1 includes an original roll support device that rotatably supports an original roll 7 wound up with a strip-shaped upper film 2 made of an aluminum film. This original fabric roll support device is configured to insert and support one rotating shaft into the paper tube of the original fabric roll 7 although not specifically shown. These rotation shafts are allowed to rotate, for example, in a free state, and when the upper film 2 is urged in the forward movement direction, the rotation shafts are rotated in accordance with the upper film 2 so as to be allowed to be pulled out from the original roll 7. In this case, the conveying force to the upper film 2 may be applied from a feed roller provided on the conveying line of the upper film 2, or the upper film 2 is conveyed by the PTP packaging machine 8 as described later. Since it is overlapped with the side film 5 and integrated by sealing, the upper film 2 in which the conveying force from the conveying device for the lower film 5 is integrated is transmitted, so there is no need to provide a feed roller for the upper film 2 in particular. Can be good too. In addition, when the transport force is applied to the upper film 2 from the downstream side and pulled out from the original fabric roll 7 as described above, the original fabric roll support device has a braking mechanism including an appropriate mechanism. It is provided so that the upper film 2 is not sent out from the raw roll 7 more than necessary by the inertia force when the drawing is stopped (temporarily stopped). Of course, in the case where a conveying force is directly applied to the upper film 2, a driving force may be directly applied to the rotating shaft that supports the original fabric roll 7.

  The upper film supply apparatus 1 includes a plurality of rollers 3 at appropriate positions. The upper film 2 drawn out from the raw roll 7 is stretched over the roller 3, and the upper film 2 is conveyed along a desired path. And the upper film supply apparatus 1 supplies the upper film 2 with respect to the sealing apparatus 4 installed on the conveyance line of the lower film 5 in the PTP packaging machine 8. FIG.

  The sealing device 4 includes a pair of heating / pressure rollers. It supplies with the upper film 2 covered on the lower film 5 between the heating / pressurizing rollers. Although not shown in the drawings, the PTP packaging machine 8 is formed by a molding device and a molding device that mold a pocket portion protruding downward at a predetermined position of the resin lower film 2 on the upstream side of the sealing device 4. A packaged article supply device for supplying tablets to be packaged into the molded pocket portion is provided. Therefore, in the figure, the lower film 5 is drawn in a single sheet shape, but in actuality, a large number of pocket portions are formed and a packaged object such as a tablet is supplied in the pocket portions. The seal device 4 is reached. Therefore, by covering the lower film 5 with the upper film 2, the package is sealed at the contact area between the unformed region of the pocket portion of the lower film 5 and the upper film 2 and supplied into the pocket portion. The upper film 2 and the lower film 5 are sealed around the periphery.

  A marking device 6 is disposed downstream of the sealing device 4. The upper film 2 and the lower film 5 which are sealed and integrated by the sealing device 4 pass through a predetermined path defined by the roller 9 and enter the marking device 6, where information such as the date of manufacture is printed. The Further, the PTP wrapping machine 8 is provided with a cutter device (punching device) on the downstream side of the marking device 6, and cuts predetermined portions of the sealed upper film 2 and lower film 5 to obtain individual PTP sheets ( PTP package) is manufactured.

  Here, in the present invention, the film tension adjusting device 10 is provided in the vicinity of the carry-out side of the upper film supply device 1, that is, at a position immediately before the sealing device 4. As shown in FIG. 1B, the film tension adjusting device 10 has a support shaft 12 attached in a cantilevered manner to a stay 11 arranged upright, and a cylindrical outer surface is attached to the support shaft 12. The cylinder 14 is rotatably mounted. The inner diameter of the outer cylinder 14 is larger than the outer diameter of the support shaft 12. Accordingly, when the shaft centers of the support shaft 12 and the outer cylinder 14 shown in FIG. 1B are made to coincide, a certain clearance (for example, 8 mm) is provided between the outer periphery of the support shaft 12 and the outer cylinder 14. Is secured. The support shaft 12 and the outer cylinder 14 are both made of SUS and have strength.

  Further, resin collars 13 are attached to both ends of the outer cylinder 14. Both ends of the outer cylinder 14 are thinned to widen the internal space, and one end of the collar 13 is inserted into the widened internal space and fixed to be integrated. In addition, the outer peripheral surface of the collar 13 on the side attached to the outer cylinder 14 has a small diameter, and the small diameter portion is inserted into the outer cylinder 14. This collar 13 has a short shaft shape like the outer cylinder 14, and its outer diameter matches the outer diameter of the outer cylinder 14, and its inner diameter is slightly smaller (for example, 1 mm) than the inner diameter of the outer cylinder 14. . Thereby, in a state where one end of the collar 13 is inserted and fixed in the outer cylinder 14, the outer peripheral surface of the outer cylinder 14 and the outer peripheral surface of the collar 13 are flush with each other. Further, since the inner diameter of the collar 13 is made smaller than the inner diameter of the outer cylinder 14, the clearance between the inner peripheral surface of the collar 13 and the support shaft 13 is less than the clearance between the inner peripheral surface of the outer cylinder 14 and the support shaft 13. Becomes narrower. Therefore, since the collar 13 comes into contact with the support shaft 13 before the inner peripheral surface of the outer cylinder 14, it is possible to prevent the outer cylinder 14 and the support shaft 13 from contacting and wearing out.

  Since the outer cylinder 14 is merely inserted and arranged on the support shaft 12 and is not particularly connected or the like between them, the outer cylinder 14 is actually moved downward from the state shown in FIG. The upper end of the support shaft 12 and the upper end of the inner peripheral surface of the collar 13 are held in contact with each other. Therefore, the outer cylinder 14 is in a state of being eccentric downward with respect to the support shaft 12. In addition, as described above, the outer cylinder 14 is inserted into the support shaft 12 but is not connected or the like. Therefore, the outer cylinder 14 can be rotated. However, in the present embodiment, since the drive source is not linked to the outer cylinder 14, it does not rotate itself.

  Further, a disc-shaped stopper member 15 is attached to the support shaft 12 in the vicinity of the tip opposite to the stay 11. The diameter of the stopper member 15 is larger than the outer diameter of the outer cylinder 14 (collar 13), and even if the outer cylinder 14 moves in the axial direction of the support shaft 12, it contacts the stopper member 15 and further outwards. It is controlled not to move (do not leave). Further, since the collar 13 is made of resin, it is prevented from being worn even if it rotates while the outer surface of the collar 13 is in contact with the stopper member 15.

  As shown in FIG. 1A, the upper film 2 is stretched around the outer periphery of the outer cylinder 14. At this time, the upper film 2 comes into contact with the lower part of the outer peripheral surface of the outer cylinder 14 and lifts the outer cylinder 14 slightly. Thereby, the lifted outer cylinder 14 tends to move downward by its own weight, and the upper film 2 is biased downward by the outer cylinder 14, so that a certain tension can be maintained. Further, when the upper film 2 moves forward in this state, the outer peripheral surface of the outer cylinder 14 also moves following the movement, that is, the outer cylinder 14 rotates counterclockwise in the drawing.

  By the way, when the tension of the film is not constant due to winding unevenness or the like in the raw fabric roll 7, slack may occur on one side of the upper film 2 in the width direction (direction perpendicular to the traveling direction). For example, as shown in FIG. 2, when the slack is generated on the stay 11 side, the upper film 2 is positioned on the lower side when viewed in the axial direction of the outer cylinder 14. Therefore, the outer cylinder 14 also tilts in accordance with the slack of the upper film 2. That is, since the outer cylinder 14 can move within the range of the clearance with the support shaft 12, the outer cylinder 14 is inclined so that the stay 11 side is on the lower side.

  Thus, the outer cylinder 14 is displaced / inclined in accordance with the slack 2 of the upper film 2, so that the outer peripheral surface of the outer cylinder 14 is in surface contact (line contact) over the entire width direction of the upper film 2. Is applied to the entire upper film 2, so that the tension can be kept constant with respect to the upper film 2. Since the sealing device 4 is arranged immediately after the downstream side of the film tension adjusting device 10, the upper film 2 having the constant tension as described above is supplied to the sealing device 4 as it is. Therefore, the upper film 2 made of an aluminum film is overlapped with the lower film 5 without generating wrinkles or the like, and is cleanly sealed by the sealing device 4.

  As shown in FIG. 3, when the upper film 2 is slack on the side opposite to the stay 11 side, the outer cylinder 14 is also on the stay 11 side so as to match the slack of the upper film 2. Tilt. Therefore, it can supply to the sealing device 4 in the state which kept tension | tensile_strength with respect to the upper film 2 by the operation | movement reverse to the above.

  In order to simplify the explanation, the outer cylinder 14 is inclined in the vertical plane. However, when the slack of the upper film 2 is also generated in the front-rear direction, the outer cylinder 14 is moved in the front-rear direction. That is, it can be inclined even in a horizontal plane and the tension can be kept constant. In practice, the outer cylinder 14 can be inclined in an arbitrary direction and posture by combining the inclinations in the vertical plane and the horizontal plane.

  Further, the stay 11 may be configured such that a portion supporting the support shaft 13 can move in the front-rear direction along the transport direction of the upper film 2. Thereby, the direct force given to the upper film 2 can be changed. That is, when the stay 11 is tilted to the sealing device 4 side, the inside of the outer cylinder 14 is also moved to the sealing device 4 side, so that the upper film 2 is biased further downward, and the film tension increases. The film tension is reduced by the reverse action. The movement of the stay 11 can be realized, for example, by rotating forward and reverse about a rotation shaft (not shown).

  As described above, in this embodiment, the outer cylinder 14 is displaced in accordance with the slack of the upper film 2 so that the tension is made constant by applying a force uniformly in the width direction of the upper film 2. As the distance from the film tension adjusting device 10 increases, the effect of making the tension constant decreases. Therefore, preferably, the gap between the sealing device 4 and the film tension adjusting device 10 is shortened as in the present embodiment. Further, for the same reason, the film tension adjusting device 10 and the sealing device 4 are separated. It is preferable not to arrange a normal fixed roller.

  However, for example, when the film tension adjusting device 10 is installed in an existing packaging machine, the insertion angle of the film with respect to the sealing device 4 generates wrinkles due to the relative positional relationship between the outer cylinder 14 and the sealing device 4. If it becomes easy, the angle adjustment roller 20 is arrange | positioned between the outer cylinder 14 and the sealing device 4, the film angle which corrects a film angle and enters the sealing device 4 becomes an angle which does not generate | occur | produce a wrinkle easily. This is preferable. In the present embodiment, the angle adjusting roller 20 is rotatably supported by the connecting member 21, and the guide pin 22 provided on the connecting member 21 is inserted and disposed in the long hole 11 b provided on the stay 11. As a result, the guide pin 22 moves along the long hole, whereby the angle adjusting roller 20 moves up and down, and the entry angle of the upper film 2 with respect to the sealing device 4 can be adjusted.

  Further, since the outer cylinder (roller) only needs to be able to change its posture in accordance with the slackness of the upper film, the present invention is provided between the support shaft 12 and the outer cylinder 14 (collar 13) as in the above-described embodiment. It is not limited to those using clearance. For example, the outer cylinder (roller) is supported in a floating state using a spring or an air spring, and the attitude of the outer cylinder is inclined according to the slack of the upper film, and the upper film is evenly biased over the entire width direction. It is also possible to take a configuration that makes the tension constant.

FIG. 4 shows a modification. In this modification, the alignment bearing 25 is disposed at the inner center portion of the outer cylinder 14 based on the above embodiment, and the support shaft 12 is supported by the alignment bearing 25. The alignment bearing 25 is positioned at the center of the outer cylinder 14 by a stop ring 26. Thus, since the bearing has a centering structure, the outer cylinder 14 can take a posture that freely tilts around the centering bearing 25.
With such a configuration, the inside of the outer cylinder 14 can be balanced in a state in which the stronger side of the upper film is lifted (see FIGS. 4B and 4C).

  Further, in this example, a biasing member 27 such as a spring is used to bias the outer cylinder 14 from the side opposite to the upper film (upper side) toward the upper film. The urging member 27 may be brought into contact with the outer cylinder 14, but if a problem occurs due to frictional resistance or the like when directly in contact with the outer cylinder 14 rotating at a high speed, the urging member 27 is brought into contact with the resin collar 13. Good. Further, for example, an annular protrusion and a corresponding groove are provided in the opposing portions of the inner peripheral surface of the outer cylinder 14 and the outer peripheral surface of the collar 13, or both are rotated relatively by interposing a bearing or the like. If the urging means is brought into contact with the collar 13 as described above, it is possible to rotate the outer cylinder 14 without rotating the collar 13. More preferred. By adopting such a configuration, the vibration of the outer cylinder can be mitigated, so that the upper film can be stably balanced even at high speed operation.

DESCRIPTION OF SYMBOLS 1 Upper film supply apparatus 2 Upper film 10 Film tension adjustment apparatus 11 Stay 12 Support shaft 13 Collar 14 Outer cylinder (roller)
15 Stopper member 20 Angle adjustment roller

Claims (6)

A packaging film supply device for supplying a belt-shaped packaging film to a packaging machine body,
A film tension adjusting device is provided on the carry-out side of the carry-out path of the packaging film,
The film tension adjusting device has a roller that contacts the packaging film from above and rotates with the movement of the packaging film, and a support mechanism for the roller,
The support mechanism is configured such that the roller urges the packaging film downward by its own weight, and supports the axis of the roller so as to be inclined in accordance with the inclination of the portion of the packaging film that is in contact with the roller .
The film tension adjusting device includes a support shaft disposed so as to cross the conveyance direction of the packaging film, and an outer cylinder serving as the roller rotatably attached to the support shaft.
The support mechanism, the larger the inner diameter of the outer cylinder than the outer diameter of the support shaft, the outer cylinder so that the axis direction of the outer cylinder and the axial direction of the support shaft intersect is configured to be inclined,
Attach collars with through holes at both ends of the outer cylinder,
The inner diameter of the through hole is smaller than the inner diameter of the outer cylinder, and larger than the outer diameter of the support shaft,
The packaging film supply apparatus, wherein the support shaft is inserted and disposed in the through hole.   The packaging film supply apparatus according to claim 1, wherein a stopper member that restricts movement of the outer cylinder in the axial direction is provided outside the support shaft in the axial direction.   The packaging film supply apparatus according to claim 1, wherein the packaging film is an aluminum film.   The packaging film supply apparatus according to any one of claims 1 to 3, wherein an angle adjusting roller that contacts the packaging film and changes an angle thereof is disposed on the downstream side of the roller. The packaging film supply device according to any one of claims 1 to 4,
A wrapping machine body for wrapping an article to be packaged using the wrapping film supplied by the wrapping film supply device;
The packaging machine, wherein the packaging film is stretched around the roller and supplied to the packaging machine body. The packaging machine main body has a pocket portion protruding downward, and covers the upper film on the lower film supplied with the packaged object in the pocket portion, and seals the contact area between the lower film and the upper film. Is,
The packaging film supply device supplies the upper film,
The packaging machine according to claim 5, wherein the film tension adjusting device is disposed immediately before a sealing device that seals the upper film and the lower film.

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