JP5194139B2 - Packaging device using film - Google Patents

Description

  The present invention relates to a film-like packaging device particularly suitable for use in a shrink wrapping machine.

  As an example of the packaging by a film-like thing, there exists shrink packaging of a drink can, for example. FIG. 9 is a view showing an example of shrink wrapping. (A) is a perspective view showing an example in which only a plurality of cans 2 (here, six pieces) are collectively packed with film 1 and (b) is on a corrugated cardboard tray 3. It is a perspective view which shows the example which shrunk-wrapped the can 2 arranged in multiple numbers (here 6 pieces) with the film 1. FIG.

Such shrink wrapping is performed by a shrink wrapping machine. FIG. 10 is a diagram showing a schematic configuration of the shrink wrapping machine, (a) is a schematic side view showing the arrangement of each part of the shrink wrapping machine on a line, and (b) is a schematic perspective view explaining the shrink wrapping process. FIG.
The schematic configuration and process of the shrink wrapping machine will be described with reference to FIGS.
The shrink wrapping machine mainly includes a can supply conveyor unit (hereinafter referred to as a can supply conveyor) 10 for supplying cans 2, a film packaging unit 160 including a film feeding device 165 and a film packaging device 166, and a shrink tunnel unit. 170, which are arranged in order on the line.

Next, a schematic process of shrink wrapping will be described with reference to FIG.
First, the cans 2 are fed toward the film packaging apparatus 166 by the can supply conveyor 10 in a group state (can group) 8 gathered and arranged in large numbers. Here, the can group 8 is grouped by a predetermined number before being fed to the film packaging device 166 on the can supply conveyor 10. That is, in order to perform shrink wrapping in a state where a predetermined number of cans 2 are arranged in a predetermined arrangement, when the cans 8 are fed to the film wrapping apparatus 166, the number of cans 8 per shrink wrap (here, And arranged in a predetermined arrangement (here, two in the line direction and three in the horizontal direction).

In this way, the grouped cans 2 fed to the film packaging device 166 are wound around the film 1 by being wound around the film 1 fed from below the can supply conveyor 10 by the film feeding device 165.
Here, the film feeding device 165 cuts a shrink film (hereinafter abbreviated as a film) 0 fed to the film feeding device 165 into a film 1 having a predetermined length, and then the film 1 is a film packaging device. To 166. Reference numeral 0 indicates a long film before cutting, and reference numeral 1 indicates a film after cutting.

The can 2 that is sleeve-wrapped by the film packaging device 166 is fed to the shrink tunnel 40.
FIG. 11 is a side view showing in detail a process until a can is sleeve-wrapped in a conventional shrink wrapping machine. However, the film feed roll motor M1, the vacuum conveyor drive roll motor M2, and the cutting roll drive motor M3 are schematically shown in order to clarify the correspondence between these motors and the roll driven by the motor. It does not show the actual shape and arrangement.

As shown in FIG. 11, in the conventional shrink wrapping machine, when the can 2 is sleeve-wrapped, three elements of the can supply conveyor 10, the film feeding device 165, and the film packaging device 166 are involved.
Here, the film feeding device 165 includes a pass line holding roll 34 that causes the film 0 wound around a roll (not shown) to travel along a predetermined pass line, and a long film 0 fed through the pass line holding roll 34. From a film cutting mechanism 167 that cuts the film 1 into a predetermined length of film 1 and a film transport vacuum conveyor 35 that feeds the film 1 cut into a predetermined length by the film cutting mechanism 167 to the film packaging device 166 Become.

  Here, the film transport vacuum conveyor 35 is driven by a vacuum conveyor drive roll motor M2 and is rotated by a vacuum conveyor drive roll 29, and a vacuum conveyor roll disposed obliquely above the vacuum conveyor drive roll 29. 36, a vacuum conveyor drive roll 29, and a vacuum belt 35A wound around the vacuum conveyor roll 36.

The vacuum belt 35A is driven and rotated by the vacuum conveyor drive roll 29, and receives the suction force of the vacuum conveyor roll 36 at the downstream end of the pass line, and sucks and holds the film 1 on the pass line while the film packaging device 166 is sucked and held. To be sent to.
Further, the film cutting mechanism 167 is provided between the pass line holding roll 34 and the film transport vacuum conveyor 35, and is provided so as to face each other, the film feed roll 26 and the film feed drive roll 28, and the vacuum conveyor drive roll 29. And a cutting roll 31 provided between the film feed roll 26 and the film pressing roll 27 with a cutting blade 99.

  The film packaging device 166 includes a can transport conveyor 11 arranged in series with a gap 38 downstream from the can supply conveyor 10 and a film fed from the film feeding device 165 to the can 2 while rotating. 1 and a flight bar 45 on which 1 is wound. In addition, the can conveyance conveyor 12 is arrange | positioned in series in the downstream of the can conveyance conveyor 11 with the clearance gap 95 opened.

The conventional shrink wrapping machine is configured as described above, and sleeve packaging of the can 2 is performed as follows.
As shown in FIG. 11, first, in the film cutting process, the film 0 supplied via the pass line holding roll 34 is sandwiched between the film feed roll 26 and the film feed drive roll 28, and is a film transport vacuum conveyor. 35.

Then, when the film 0 is fed by a predetermined length by the film transport vacuum conveyor 35, the cutting roll 31 starts rotating and cuts the film 0 into the film 1 having a predetermined length.
Thus, the film 1 cut into a predetermined length is transported on the line while being sucked by the film transport vacuum conveyor 35, and is transported through the gap 38 between the can supply conveyor 10 and the can transport conveyor 11. It is supplied to the upper surface of the conveyor 11. At this time, in synchronization with the film 1, the cans 2 grouped from the can supply conveyor 10 are also transferred to the can conveyance conveyor 11 and placed on the film 1. Accordingly, the film 1 is sandwiched between the can 2 and the can transport conveyor 11, starts to transfer to the can transport conveyor 11 together with the can 2, and is peeled off from the film transport vacuum conveyor 35.

  After that, the flight bar 45 that moves on the track indicated by the two-dot chain line in FIG. 11 passes through the gap 38 between the conveyors, and starts to transfer to the can conveyor 11 and moves the intermediate portion of the film 1 that is moving on the gap 38. Roll up. Then, the flight bar 45 moves in the moving direction of the can 2 at a higher speed than the moving speed of the can 2 while hooking the film 1, and as shown by (1) in FIG. The film 1 is guided so that the end portion of the film 1 on the side not sandwiched between 2 and the can conveyor 11 falls to the front (moving direction side) of the can 2. When the can 2 reaches the end of the can transport conveyor 11 in the state shown in (1), the end portion of the film 1 that hangs down on the can transport conveyor 11 falls down the gap 95 between the conveyors. When the can 2 is transferred to the can conveying conveyor 12 with the end of the film 1 falling down in the gap 95, the end of the film 1 is placed under the can 2 as shown by (2) in FIG. It is in the state of being caught, and sleeve packaging is completed.

However, each device provided in the above-described conventional shrink wrapping machine has the following problems.
Here, the subject is demonstrated, further explaining in detail about the cutting process of a film, and the process which winds a film in a can.
First, the structure and the film cutting operation of the film cutting mechanism 167 will be described in more detail with reference to FIG.

  FIG. 12 is a side view for explaining the detailed structure and operation of a film cutting mechanism 167 of a conventional shrink wrapping machine, where (a) shows a state before film cutting, and (b) shows a state during film cutting. FIG. 4C is a diagram showing a state where film cutting is completed. However, for the film feed roll motor M1, the vacuum conveyor drive roll motor M2, and the cutting roll drive motor M3, in order to clarify the correspondence between these motors and the roll driven by the motor, as in FIG. It does not show the actual shape and arrangement.

  As shown in FIGS. 12A to 12C, the film cutting mechanism 167 is provided on the film feed roll 26, the film feed drive roll 28, and the vacuum conveyor drive roll 29 provided opposite to each other as described above. It consists of a film pressing roll 27 provided in opposition, and a cutting roll 31 disposed between the film feeding roll 26 and the film pressing roll 27, and the cutting roll 31 is provided with a cutting blade 99. The film feed drive roll 28 is driven by a film feed roll motor M1, the vacuum conveyor drive roll 29 is driven by a vacuum conveyor drive roll motor M2, and the cutting roll 31 is driven by a cutting roll drive motor M3.

  Further, the cutting roll 31 has a biting ratio (cutting blade maximum biting depth h) so that the cutting blade 99 is at a height position suitable for cutting the film 0 with respect to the film 0 pass line (film pass line L). / Roll center distance P) is arranged to be within a specified range. Here, the film pass line L is a line formed by the film 0 by being supported by the film feed drive roll 28 and the vacuum conveyor drive roll 29. Further, the cutting blade maximum biting depth h is determined based on the film pass line L in a state where the cutting blade 99 is perpendicular to the film pass line L (most bite into the film pass line L). It is a biting depth, and the distance P between roll centers is the distance between the roll centers of the film feed drive roll 28 and the vacuum conveyor drive roll 29.

In the above-described configuration, in order to cut the film 0 with the cutting blade 99, the cutting blade 99 is pushed downward by the cutting blade 99 with the cutting blade 99 biting into the film pass line L as shown in FIG. A sufficient reaction force must be generated in the film 0 with respect to the force, that is, the film 0 needs to have a sufficient tension at the distance P between the roll centers.
Therefore, as described above, the film feed drive roll 28 and the vacuum conveyor drive roll 29 are driven by separate drive motors, and the vacuum conveyor drive roll 29 is rotated faster than the film feed drive roll 28, so that the roll center. A sufficient tension is generated in the film 0 at the distance P.

Next, the operation of the cutting mechanism 167 will be described.
First, as shown in FIG. 12A, the film 0 is sent out to the vacuum conveyor 35 by a film feed roll 26 and a film feed drive roll 28, and a film pressing roll 27 and a vacuum conveyor drive roll 29.
When the film 0 is sent to the vacuum conveyor 35 up to a predetermined length, the cutting blade 99 has a predetermined length at the position where the leading edge of the cutting blade 99 bites into the film 0 as shown in FIG. Disconnect.

  Next, as shown in FIG. 12 (c), the film 1 cut to a predetermined length is fed to the next process while being adsorbed by the vacuum conveyor 35, while the remaining end portion of the film 0 is Once it becomes free, it is sandwiched between the film pressing roll 27 and the vacuum conveyor drive roll 29 and sent to the vacuum conveyor 35 to return to the state shown in FIG.

However, in such a conventional film cutting mechanism, the film can be cut if the tension acting on the film 0 at the roll center distance P is uniform in the width direction of the film 0, but the tension is not uniform in the width direction. In the case where such tension is insufficient, there is a problem that cutting failure tends to occur.
Furthermore, since the film 0 has almost no rigidity, the film 0 that has been once cut by the cutting blade 99 hangs down below the mating surface of the film pressing roll 27 and the vacuum conveyor drive roll 29 due to its own weight. For this reason, there is also a problem that the film 0 cannot enter between the film pressing roll 27 and the vacuum conveyor drive roll 29, and film clogging or the film 0 is easily caught in the film feed roll 28.

Next, the configuration and operation for feeding the film 1 under the can will be described in more detail with reference to FIG.
FIG. 13 is a side view for explaining the configuration and operation for feeding the film 1 under the can in the film feeding apparatus of the conventional shrink wrapping machine. FIG. 13A is a state in which the film 1 is normally fed under the can. (B) shows the state in which the film 1 was not normally fed under the can.

  As shown in FIG. 13, the mechanism for feeding the film 1 under the can includes a can supply conveyor 10 and a can transport conveyor 11 that are arranged in series with a gap 38 therebetween, a vacuum conveyor 35 for film transport, And a flight bar 45. Further, a guide bar 37 for guiding the film 1 fed from the film conveying vacuum conveyor 35 to the can conveying conveyor 11 is attached to the gap 38 between the conveyors.

Here, the gap 38 between the conveyors has an interval large enough for the film 1 fed from the lower film conveying vacuum conveyor 35 and the flight bar 45 to wind up the film 1 to pass through. It is provided as follows.
Next, the operation | movement which sends the film 1 under a can is demonstrated.
The film 1 cut to a predetermined length by the cutting mechanism 167 is fed to the can conveyance conveyor 11 through the gap 38 while being guided by the guide bar 37 by the film conveyance vacuum conveyor 35. The film 1 is sandwiched between the can 2 and the can transport conveyor 11 that have been moved to the can transport conveyor 11 and starts to transfer to the can transport conveyor 11, but the can 2 completely transfers to the can transport conveyor 11 and the film 1. On the way from the film transport vacuum conveyor 35 to the can transport conveyor 11, that is, when the film 1 exists in the gap 38, the flight bar 45 passes through the gap 38 and winds up the film 1.

  However, in such a conventional film feeding apparatus, the vacuum conveyor roll 36 serving as the end point of the film conveying vacuum conveyor 35 is provided as a can supply in order to secure the installation space for the guide bar 37 and the moving space for the flight bar 45. It must be installed at a position lower than the conveyor 10 and the can conveyor 11. For this reason, when providing the front end of the film 1 to the lower part of the can 2 that is moving from the can supply conveyor 10 to the can transport conveyor 11, the front end of the film 1 that has passed through the vacuum conveyor roll 36 is free. The film 1 which is only supported by the guide bar 37 and has almost no rigidity cannot smoothly pass through the gap 38, and for example, the film 1 is clogged by the gap 38 as shown in FIG. There is.

  Further, in the conventional film wrapping apparatus of the shrink wrapping machine, if the moving speed of the can conveyor 11 is high, the wrapping speed of the film 1 by the flight bar 45 also increases accordingly. As shown in FIG. -While the film 45 is moving while hooking the film 1, the film 1 is swollen by the wind indicated by A, and even if it is dropped in the moving direction of the can 2 by the flight bar 45, the can In some cases, the length of the film wound under the can of 2 is insufficient, so that the film cannot be wound under the can.

In addition, the other end of the film 1 wound around the can 2 may not fall into the gap 95 between the can conveyance conveyors 11 and 12, and the winding of the can 2 under the can may fail.
Further, the front end portion of the film 1 which has been guided by the flight bar 45 and moved to the front (moving direction side) of the can 2 slides down from the flight bar 45 due to air resistance (wind pressure) and the like accompanying this movement, and is shown in FIG. As shown, there is a problem that the can 2 may not be able to be engulfed by the film 1 because the can 2 falls to the opposite side (the back of the can 2).

  The present invention was devised in view of such problems, and an object of the present invention is to provide a packaging apparatus using a film-like material that enables reliable packaging using the film-like material.

  For this reason, the packaging apparatus using the film-like material according to the first aspect of the present invention is based on a film-like material, in which a film-like material cut into a predetermined length is wrapped around an article conveyed through an article conveyance path and sleeve-wrapped. In the packaging apparatus, a flight bar is provided for winding the other end of the film-like material, one end of which is sandwiched between the article conveyance path and the article, around the article, and the flight bar is disposed above the article conveyance path. A belt for preventing fall that sandwiches the other end of the film-like material in cooperation with the belt to prevent the other end of the film-like material from falling and moves the other end of the film-like material in the article winding direction. It is characterized by being arranged.

  The packaging device using the film-like material of the present invention according to claim 2 is the packaging device using the film-like material according to claim 1, wherein air is blown onto the outer surface of the end portion of the film-like material above the article conveyance path. And a winding guide mechanism for guiding winding of the film-like material around the article.

  According to the packaging apparatus using the film-like material of the present invention as set forth in claim 1, since the film-like material does not fall from the flight bar and the film-like material can be reliably wound around the article, stable operation can be performed. There is an advantage.

  According to the packaging apparatus using the film-like material of the present invention as set forth in claim 2, in addition to the effect of claim 1, the film-like material can be reliably wound around the lower part of the article, so that the stable operation can be performed. There is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, as this embodiment, the example which applied the packaging apparatus by the film-form thing of this invention to the shrink wrapping machine of a drink can is demonstrated.

1 to 8 show an embodiment of the present invention. FIG. 1 is a side view of a line schematically showing the configuration of a shrink wrapping machine according to the present embodiment, and FIGS. FIGS. 6 and 7 are diagrams showing a packaging apparatus using a film-like material according to the present embodiment, and FIG. 8 is a diagram showing a sleeve-wrapped can.
First, the overall configuration of the shrink wrapping machine according to the present embodiment will be described with reference to FIG.

The shrink wrapping machine includes a can feeding conveyor (conveyor) 10, a film feeding device (film-like material feeding device) 65, a film packaging device (wrapping device using a film-like material) 66, and the film packaging device. A shrink tunnel portion 68 for shrink-wrapping the can with a film (film-like product) 1 sleeve-wrapped at 66 is formed.
The shrink tunnel portion 68 is configured in the same manner as that of the conventional example (see reference numeral 170 in FIG. 10), and thus is partially omitted in FIG. Further, since the can feeding conveyor 10 is the same as the conventional one, the film feeding device 65 and the film packaging device 66 which are features of the shrink wrapping machine will be described in detail.

  First, the film feeding device 65 will be described. As shown in FIG. 1, the film feeding device 65 includes a film supply mechanism 75, a film cutting mechanism (film-like material cutting mechanism) 67, and a film conveying vacuum conveyor (film-like material conveying vacuum conveyor) 35. In addition, the film supply mechanism 75, the film cutting mechanism 67, and the film transport vacuum conveyor 35 constitute a feeding path for feeding the film 0 or the film 1.

The film supply mechanism 75 includes a film roll 74, a pass line holding roll 72, and a meandering prevention roll 73. A shrink film (hereinafter referred to as a film) 0 wound around the film roll 74 is transferred to the film cutting mechanism 67. It is arranged to supply.
The vacuum conveyor 35 for film conveyance includes a vacuum conveyor drive roll 29 disposed below the film cutting mechanism 67 and a can supply constituting a can conveyance path (article conveyance path) obliquely above the vacuum conveyor drive roll 29. A vacuum conveyor roll 36 provided below the conveyor (conveyance conveyor) 10 and the can conveyance conveyor (conveyance conveyor) 11, and a vacuum belt 35A wound around the vacuum conveyor drive roll 29 and the vacuum conveyor roll 36. It consists of and.

  The vacuum conveyor roll 36 at the upper end of the film conveying vacuum conveyor 35 is arranged to reach the vicinity of the conveying surface level of the can conveying path in which the can supply conveyor 10 and the can conveying conveyor 11 are arranged in series at intervals. It is arranged. Furthermore, an air supply nozzle (fall prevention mechanism) 130 is attached below the delivery portion of the film 1 from the film conveyance vacuum conveyor 35 to the can conveyance conveyor 11.

  The film cutting mechanism 67 is disposed above the film conveyance start point of the film conveyance vacuum conveyor 35, that is, above the vacuum conveyor driving roll 29, and is disposed opposite to the pass line holding roll 72 and the feeding roll 70. , 71, a moving roll 120, a film holding roll (film-like object holding roll) 50, and a cutting roll 60 provided facing the film holding roll 50 and having a cutting blade 64.

  The cutting blade 64 is attached to the cutting roll 60 so as to be tangent to the outer periphery of the cutting roll 60 and to protrude toward the rotation direction of the cutting roll 60, and the cutting blade 64 (cutting roll 60) rotates. At this time, the film holding roll 50 rotating in synchronization with the cutting roll 60 is not interfered. Moreover, the attachment method of this cutting blade 64 makes the attachment and removal of the cutting blade 64 easy, and makes the cutting blade 64 bite into the film 1 effectively.

The moving roll 120 moves to the film 0 side when the film 0 is cut, applies tension to the film portion to be cut, and reliably cuts the film.
Here, as shown in FIG. 2, the film holding roll 50 includes a roll part 51 that holds the film 1 on the outer peripheral surface, and a mandrel 49 for supporting the roll part 51. 49 is attached to bearing support plates 89 and 89 so as to be rotatable around 49.

As shown in FIG. 2A, a roll rotation motor 91 is connected to one end side of the mandrel 49 of the film holding roll 50 through a speed reducer 90, and the mandrel 49 and the roll unit 51 are connected by this motor 91. Is driven to rotate.
Further, as shown in FIGS. 2A and 2B, a groove portion 55 for receiving a cutting blade 64 provided on the cutting roll 60 and a film holding mechanism (suction mechanism) 52 are provided on the outer peripheral surface of the roll portion 51. A vacuum part 58 and a small-diameter hole 59 for film suction are provided.

The film holding mechanism 52 includes a vacuum part 58 and a film suction small diameter hole 59 of the roll part 51, a small diameter hole chamber 57 provided on the side of the roll part 51 on the other end side of the film holding roll 50, and a film holding The negative pressure supply unit 80 is fixedly installed on the other end side of the roll 50.
The small-diameter hole chamber 57 communicates with the vacuum part 58, and the film suction small-diameter hole 59 is provided on the outer peripheral side of the vacuum part 58 and is also communicated with the vacuum part 58. Therefore, the small-diameter hole chamber 57 is connected to the vacuum part 58. The small-diameter hole 59 for sucking the film is communicated via 58.

  The negative pressure supply unit 80 is disposed on the outer periphery of the mandrel 49 in the recess 51 </ b> A on the side surface of the roll portion 51, supported by the bearing support plate 89 and fixed in a non-rotating state. The negative pressure supply unit 80 includes a vacuum chamber 81 and a negative pressure supply port 82. The negative pressure supply port 82 is connected to a vacuum pump or the like (not shown), and negative pressure is supplied to the vacuum chamber 81 from the outside via the negative pressure supply port 82.

  The small-diameter hole chamber 57 on the roll 51 side and the vacuum chamber 81 on the negative pressure supply unit 80 side are each formed to have a substantially arc-shaped cross section with the same radius, as shown in FIG. When the roll portion 51 rotates and the small-diameter hole chamber 57 and the vacuum chamber 81 are in a rotation angle state as shown in FIG. 2B, the small-diameter hole chamber 57 communicates with the vacuum chamber 81. Thus, the inside of the vacuum part 58 is reduced to a negative pressure.

  As shown in FIG. 2B, the small-diameter hole chamber 57 is formed from a portion corresponding to the portion where the vacuum portion 58 is formed to the vicinity of the central portion in the width direction of the groove portion 55. On the other hand, the vacuum chamber 81 extends from a position indicated by A slightly above the upper side of the vertical reference line BL (upstream side in the rotation direction of the film holding roll 50) to a position indicated by B below the vertical reference line BL. Is provided.

Therefore, only when the small-diameter hole chamber 57 that rotates together with the roll portion 51 is located in a range where the vacuum chamber 81 and the vacuum chamber 81 overlap (area indicated by AB in FIG. 2B), the small-diameter hole chamber 57. Are communicated with the vacuum chamber 81.
The rotation of the film holding roll 50 causes the small-diameter hole chamber 57 to reach the position A shown in FIG. 2B just before the groove portion 55 reaches above the vertical reference line BL. Immediately before the film 0 is cut while 64 enters. The small-diameter hole chamber 57 reaches the position B shown in FIG. 2B when the cut film 1 is delivered to the film conveying vacuum conveyor 35.

  That is, the film suction small-diameter hole 59 sucks the film 0 or 1 by negative pressure from immediately before the film 0 is cut to when the cut film 1 is completely delivered to the film transport vacuum conveyor 35. The film 0 or 1 is sucked and held on the outer peripheral surface of the film holding roll 50 through the film suction small diameter hole 59.

  Next, the air supply nozzle 130 will be described. As shown in FIG. 5, the air supply nozzle 130 is disposed close to the lower part between the vacuum conveyor roll 36 and the can transport conveyor 11, and air is jetted upwardly between the vacuum conveyor roll 36 and the can transport conveyor 11. It is supposed to be. Thereby, the film 1 having almost no rigidity conveyed by the film conveying vacuum conveyor 35 to the can conveying conveyor 11 does not hang down from the conveying surface of the can conveying conveyor 11, so that the film 1 is reliably transferred. It is trying to get on the transport surface.

Thus, since the air supply nozzle 130 prevents the film 1 from sagging, the guide bar 37 as in the prior art (see FIG. 13) is unnecessary, and as a result, the vacuum conveyor roll 36 is conveyed as described above. It can be placed up to near the surface level.
Next, the film packaging apparatus 66 will be described. As shown in FIG. 1, the film wrapping device 66 has can transport conveyors 11 and 12 arranged in series with a gap 95 therebetween, and a track 46 indicated by a two-dot chain line in the drawing. A flight bar 45 that moves the belt, a belt 97 that is provided with a belt mounting bar 98, and a fall prevention belt 97 that is supported and disposed above the can transport conveyor 11 by the belt mounting bar 98. An air injection nozzle (winding guide mechanism) 100 is configured.

The gap 95 between the can conveyors 11 and 12 is large enough to pass the flight bar 45 moving on the track 46 indicated by a two-dot chain line in FIG. 1, and in the state shown in FIG. As described above, one end of the film 1 wound around the can 2 to be transferred from the can transport conveyor 11 to the can transport conveyor 12 is made large enough to drop.
Here, the one end of the film 1 wound around the can 2 is dropped into the gap 95 so as to be in the state of (2) in FIG. This is because one end of the film 1 hanging in the gap 95 is rolled under the can by being transferred to the conveyor 12, and the sleeve of the can 2 is wrapped in a state as shown in (3) in FIG. Because.

Further, as shown in FIG. 7, the air injection nozzle 100 is disposed above the gap 95 so that one end of the film 1 wound around the can 2 to be transferred from the can transport conveyor 11 to the can transport conveyor 12 is Downward air is blown to one end of the film 1 so as to surely fall into the gap 95 (the state shown by (2) in FIG. 7).
The fall prevention belt 97 is disposed so as to be in contact with the flight bar 45 moving on the track 46 as shown in FIG. 6, and cooperates with the flight bar 45 to connect the can conveyor 11 and the can 2 with each other. The other end side of the film 1 having one end sandwiched therebetween is sandwiched and reliably guided to the front (moving direction side) of the can 2.

The shrink wrapping machine according to the embodiment of the present invention is configured as described above, and the shrink wrapping process is performed as follows.
The structure of the outline process of shrink packaging by the shrink packaging machine is the same as that of the prior art as shown in FIG. That is, the film feeding device 65 cuts the film 0 into a predetermined length and feeds the film 0 to the film packaging device 66, and the film packaging device 66 removes the grouped cans 2 supplied by the can supply conveyor 10. Then, the sleeve 1 is wrapped with the film 1 fed from the film feeding device 65. The sleeve-wrapped can 2 is sent to the shrink tunnel portion 68 to complete the shrink wrapping.

However, the specific processing by the film feeding device 65 and the film packaging device 66 is different from the conventional technology.
Hereinafter, each operation | movement is explained in full detail about the film feeding apparatus 65 and the film packaging apparatus 66 which are the characteristics of this shrink apparatus.
First, the film feeding device 65 will be described.

  As shown in FIG. 1, first, the film supply mechanism 75 is wound around the film roll 74 while forming a predetermined pass line by the pass line holding roll 72 while preventing the meandering of the film 0 by the meander prevention roll 73. The film 0 being fed is supplied to the film cutting mechanism 67. The film cutting mechanism 67 cuts the long film 0 fed from the film supply mechanism 75 into the film 1 having a predetermined length and feeds it to the film conveying vacuum conveyor 35. Thereafter, the film conveying vacuum conveyor 35 feeds the film 1 to the film packaging device 66.

  Here, the operation of the film cutting mechanism 67 will be described in detail with reference to FIGS. The long film 0 supplied from the film supply mechanism 75 is sent between the film holding roll 50 and the cutting roll 60 via the pass line holding roll 72, the feeding rolls 70 and 71, and the moving roll 120. FIG. 3A shows a state in which the film 0 is conveyed by the film conveyance vacuum conveyor 35 until it reaches a predetermined length. At this time, the cutting roll 60 and the film holding roll 50 are stopped.

  At this time, the small-diameter hole chamber 57 is in a position not communicating with the vacuum chamber 81 provided in the region θ shown in FIG. 3, and the suction force does not work outside the outer periphery of the vacuum suction small-diameter hole 59. It does not hinder the conveyance of film 0. When the film 0 is fed to a predetermined length on the film transport vacuum conveyor 35 while being adsorbed by the film transport vacuum conveyor 35, the film holding roll 50 and the cutting roll 60 start rotating in synchronization with each other, as shown in FIG. ).

  FIG. 3 (b) shows the situation where the cutting of the film 0 is started. At this time, the region θ over the position indicated by A and B in FIG. 3 (b) of the film holding roll 50, that is, the installation range of the vacuum chamber 81, Since the small-diameter hole chamber 57 has reached, as described above, the vacuum portion 58, that is, the vacuum suction small-diameter hole 59 communicates with the vacuum chamber 81 and becomes a negative pressure to adsorb the film 0.

  The film 0 rotates with the film holding roll 50 while being adsorbed by the vacuum suction small-diameter hole 59 and is finally pushed into the groove 55 by the cutting blade 64. At this point, the moving roll 120 is lowered to apply tension to the film 0 in order to further ensure the cutting of the film 0. When the cutting blade 64 rotates and reaches the lowest point, the tension acting on the film 0 is maximized and the film 0 is cut. The moving roll 120 is raised to the original position after the film 0 is cut.

  In this way, the film 1 having a predetermined length separated from the long film 0 adsorbed in the vacuum suction small-diameter hole 59 is located away from the position where the vacuum suction small-diameter hole 59 exists. It is released from the adsorption force of the small-diameter hole 59 for use. And the film holding roll 50 and the cutting roll 60 rotate, and the film 1 is conveyed as shown to Fig.4 (a).

Thereafter, the film 1 is sandwiched between the film holding roll 50 and the vacuum belt 35A, sent to the film conveyance vacuum conveyor 35, and fed to the next step while being adsorbed.
In addition, the speed of the film conveyance vacuum conveyor 35 is set slightly faster than the speed of the film holding roll 50, and the preceding film 1 is conveyed faster than the succeeding film 0, so that the film 1 is conveyed at an appropriate interval. Sending out.

  Further, when the film holding roll 50 rotates and reaches a position as shown in FIG. 4B, the small-diameter hole chamber 57 moves outside θ, so that the small-diameter hole chamber 57 communicates with the vacuum chamber 81. As a result, the vacuum suction small-diameter hole 59 does not suck the film 0. Therefore, the end of the moving direction side of the film 0 is now sucked by the film transport vacuum conveyor 35, so that the film 0 is transported by the film transport vacuum conveyor 35 while sliding on the outer periphery of the film holding roll 50. .

Thereafter, the film holding roll 50 and the cutting roll 60 rotate and stop to the state shown in FIG. 3A, enter a standby state, and repeat the above-described operation.
Here, the film 1 conveyed by the film conveyance vacuum conveyor 35 will be described with reference to FIG.
As shown in FIG. 5 (a), the film 1 transported by the vacuum conveyor 35 eventually passes through the vacuum conveyor roll 36 and does not receive the suction force from the vacuum conveyor 35, but becomes free. Since the air is blown upward from the air supply nozzle 130, the portion that has become free runs on the can transport conveyor 11 without falling, and eventually moves from the can supply conveyor 10 to the can transport conveyor 11. The can 2 is sandwiched between the can 2 and the can conveyor 11 and moves on the can conveyor 11 together with the can 2.

Thereafter, as shown in FIG. 5 (b), the film 1 is wound up by the flight bar 45 moving from below and peeled off from the vacuum conveyor 35, and the film packaging process by the film packaging device 66 is performed. move on.
In particular, since the vacuum conveyor 35 is disposed so as to reach the level surface of the can conveyance path, the can 2 is a vacuum for film conveyance in the transition of the can 2 between the can supply conveyor 10 and the can conveyance conveyor 11. Since the end of the film 1 is supported by the end point of the conveyor 35 and can move stably, and the front end of the film 1 can be directly supplied to a predetermined position of the can 2 that is moving from the can supply conveyor 10 to the can conveyance conveyor 11, This eliminates the problem of mistakes in film supply. As a result, the film can be supplied smoothly without the tip of the film 1 falling.

Next, the operation of the film packaging apparatus 66 will be described.
First, FIG. 6 demonstrates the operation | movement of the film packaging which winds the film 1 around the can 2 conveyed in a can conveyance path. Here, (1) to (4) given in the drawing sequentially show the state of the film packaging accompanying the movement of the can 2, and the flight bar 45 moves on the track 46 indicated by the two-dot chain line in the drawing.

  The flight bar 45 passes between the can supply conveyor 10 and the can conveyor 11 and winds up the other end of the film 1 with one end sandwiched between the can conveyor 11 and the can 2. While sandwiching the film 1 together with the fall-preventing belt 97, the film 2 moves forward (moving direction) of the can 2 to overtake the can 2 and eventually descends to wind the end of the film 0 down to the front of the can 2.

  Thus, the film 1 can be prevented from falling from the flight bar 45 by being wound around the can 2 while being sandwiched between the flight bar 45 and the fall prevention belt 97, and Since the drag is generated so that the film 1 does not detach from the flight bar 45, it can be tightly wound around the can 2, and air enters between the film 1 and the can 2 as shown in FIG. There is no shortage of length to wrap under the can.

Next, the process of winding the film 1 under the can 2 will be described with reference to FIG.
By simply winding the film 1 around the can 2 with the flight bar 45 by the above-described operation, the tip of the film 1 is hung on the can transport conveyor 11 as shown in (1) in FIG. It doesn't wrap around below. When the can 2 reaches the end point of the can conveyor 11 in this state, the end of the film 1 is dropped into the gap 95 between the conveyors by the jet air from the air jet nozzle 100 in FIG. It becomes like the state.

Eventually, when the can 2 is transferred from the can conveyer 11 to the can conveyer 12, one end of the film 1 hanging in the gap 95 is wound under the can, and the state becomes as shown in (3) in FIG. Complete. The completed sleeve packaging is as shown in FIG.
As described above, since the end of the film 1 can be surely dropped into the gap 95 between the conveyors, the winding of the film 1 under the can 2 does not fail.

Therefore, according to the shrink wrapping machine of the present embodiment, the following effects can be obtained.
That is, according to the film feeding device 65 of the present embodiment, the thin and weak film 0 can be easily and reliably cut, and the film 1 cut to a predetermined length is also fed to the next process. There is an advantage that it becomes reliable and stable operation can be performed.
Moreover, according to the film packaging apparatus 66 of this embodiment, there is no fall of the film 1 from the flight bar 45, and also the winding and the winding of the film 1 around the can 2 are ensured. There is an advantage that sleeve packaging of the can 2 can be performed and stable operation can be performed.

In other words, the film feeding device 65 and the film packaging device 66 have an advantage that stable operation can be performed through the processes from the cutting of the film 0 to the completion of the sleeve packaging of the can 2.
In addition, the packaging apparatus by the film-form thing of this invention is not limited to the above-mentioned embodiment, It can implement in various deformation | transformation.
For example, in this embodiment, as shown in FIG. 1, the cutting blade 64 is attached to the cutting roll 60 so as to be tangent to the outer periphery of the cutting roll 60 and to protrude toward the rotation direction of the cutting roll 60. In the range that does not interfere with the film holding roll 50, for example, as in the conventional example, the cutting blade 64 may be attached to be perpendicular to the outer periphery of the cutting roll 60, and the shape of the cutting blade 64, The installation direction of the cutting blade 64 on the cutting roll 60 is not limited to this embodiment.

  Further, as shown in FIG. 9A, the can 2 is directly packaged with the film 1, but as shown in FIG. 9B, the can 2 is stored on the cardboard tray 3 and wrapped with the film 1. You may make it do. Also, the article packaged in the film may be other than the beverage can.

It is a side view of the line which shows typically the composition of the shrink wrapping machine provided with the film-like thing feeding device concerning one embodiment of the present invention, and the packaging device by a film-like thing. It is a figure which shows the structure of the film-form holding roll of the film-form supply apparatus concerning one Embodiment of this invention, (a) is a side view, (b) is CC arrow view of (a). There is a partially broken view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view for explaining cutting and feeding of a film-like material in a film-like material feeding device according to an embodiment of the present invention, wherein (a) and (b) show each step. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view for explaining cutting and feeding of a film-like material in a film-like material feeding device according to an embodiment of the present invention, wherein (a) and (b) show each step. It is a side view of the line which shows the feeding process of a film-like thing in order of (a) and (b) with the film-like substance feeding apparatus concerning one Embodiment of this invention, (a) is a film under a can. The state immediately after being sent in is shown, and (b) shows the state in which the film-like material is then wound up by the flight bar. It is a side view of the line which shows the film-like material winding process to the can by the packaging apparatus by the film-like material concerning one Embodiment of this invention. It is a side view of the line which shows the film-like material winding process under the can by the packaging apparatus by the film-like material concerning one Embodiment of this invention. It is a typical side view which shows the state of the sleeve packaged can. It is a perspective view which shows the example of a general shrink wrap, (a) shows the example which shrink-wrapped only the can, (b) is a figure which shows the example which shrink-wrapped the can put in the cardboard tray. It is a figure which shows schematic structure of the conventional shrink wrapping machine, (a) is a typical side view of a shrink wrapping machine, (b) is a typical perspective view explaining the process of shrink wrapping. It is a side view which shows the detailed structure of the conventional shrink wrapping machine. It is a side view explaining the detailed structure and operation | movement of the film cutting mechanism of the conventional shrink wrapping machine, (a) shows the state before film cutting, (b) shows the state under film cutting, (c) is The state of film cutting completion is shown. It is a side view explaining the structure and operation | movement for sending the film cut | disconnected in the conventional shrink wrapping machine under a can, (a) shows the state by which the film was normally sent under the can, (b) The state where the film was not normally fed under the can. It is a side view which shows the winding process of the film around a can in the conventional shrink wrapping machine. The state which the film cut | disconnected in the conventional shrink wrapping machine was not normally sent under the can is shown.

0 Shrink film as a film (shrink film before cutting)
1 Shrink film as a film (Shrink film after cutting)
2 Can 3 Corrugated tray 8 Can group 10 Can supply conveyor (conveyor)
11, 12 can conveyor (conveyor)
26 Film Feed Roll 27 Film Pressing Roll 28 Film Feed Drive Roll 29 Vacuum Conveyor Drive Roll 31 Cutting Roll 34 Pass Line Holding Roll 35 Film Conveyance Vacuum Conveyor (Film Conveyance Vacuum Conveyor)
35A Vacuum belt 36 Vacuum conveyor roll 37 Guide bar 38 Clearance 40 Shrink tunnel 45 Flight bar 46 Track 49 Mandrel 50 Film holding roll (film-like material holding roll)
51 Roll part 51A Recess 52 Film holding mechanism (suction mechanism)
55 groove portion 57 chamber for small diameter hole 58 vacuum portion 59 small diameter hole for film suction 60 cutting roll 64 cutting blade 65 film feeding device (film-like material feeding device)
66 Film packaging equipment (wrapping equipment using film-like materials)
67 Film cutting mechanism (film cutting mechanism)
68 Shrink tunnel portion 70, 71 Feed roll 72 Pass line holding roll 73 Meander prevention roll 74 Film roll 75 Film supply mechanism 80 Negative pressure supply unit 81 Vacuum chamber 82 Negative pressure supply port 88 Bearing 89 Bearing support plate 90 Reducer 91 Roll rotation Motor 95 Clearance 97 Fall prevention belt 98 Belt mounting bar 99 Cutting blade 100 Air injection nozzle (winding guide mechanism)
120 Moving roll 130 Air supply nozzle (Fall prevention mechanism)
160 Film packaging section 165 Film feeding apparatus 166 Film packaging apparatus 167 Film cutting mechanism 170 Shrink tunnel section A, B End point of vacuum chamber installation range BL Vertical reference line P Distance between roll centers L Film pass line M1 Motor for film feed roll M2 Vacuum conveyor drive roll motor M3 Cutting roll drive motor h Cutting blade maximum bite depth θ Vacuum chamber installation range

Claims (2)

In a packaging apparatus using a film-like material, a film-like material cut into a predetermined length is wrapped around a product conveyed through an article conveyance path, and sleeve-wrapped.
A flight bar for winding the other end side of the film-like material sandwiched between the article conveying path and the article around the article;
The other end side of the film-like object is clamped in cooperation with the flight bar above the article conveying path to prevent the other end side of the film-like object from falling, and the other end side of the film-like object is A wrapping apparatus using a film-like material, characterized in that a fall-preventing belt that moves in the article winding direction is disposed. A winding guide mechanism for guiding the winding of the film-like material around the article by blowing air onto the outer surface of the end of the film-like material is provided above the article conveyance path. Item 1. A packaging apparatus using the film-like material according to item 1.

Images