JP6405571B2 - Method for manufacturing container with shrink film - Google Patents

Description

The present invention relates to a method for manufacturing a container with a shrink film, and more particularly, a container with a shrink film to which a cylindrical shrink film fitted around an article such as a PET bottle, a beer bottle, or a cup container is heat-shrinked and mounted . It relates to a manufacturing method .

2. Description of the Related Art Conventionally, containers such as PET bottles filled with liquid beverages such as soft drinks are usually provided with a cylindrical label made of a shrink film on which a product name, content display, or the like is printed.
This label includes a conveyor that conveys containers along a predetermined conveyance path, a label fitting device that fits a non-shrinkable cylindrical label on a container conveyed by the conveyor, and a cylindrical label that is fitted on the container. In general, a container is continuously mounted on a container by a label mounting system including a heat-shrinking device that heat-shrinks the container.

  The heat-shrink device provided in such a label mounting system has a heat treatment chamber installed so as to cover a conveyor that conveys a container in which a cylindrical label is fitted, and a container that passes through the heat treatment chamber. A heating means for heating the fitted cylindrical label with hot air or water vapor is provided, and the cylindrical label is heated and contracted while the container passes through the heat treatment chamber.

  Here, when the cylindrical label is heated by hot air, the air heated to about 100 to 200 ° C. by the heater is locally sprayed on the cylindrical label fitted to the container. There was a problem that the heat shrinkage could not be made uniformly, and the design and characters printed on the cylindrical label were distorted and could not be finished beautifully.

  On the other hand, when the cylindrical label is heated with water vapor, the entire cylindrical label can be uniformly heat-shrinked, so the design and characters printed on the cylindrical label are not easily distorted and can be finished beautifully. There is a problem that water drops adhere to the surface of the cylindrical label or the container, and the cardboard box or the like gets wet when packed in a box.

  In order to solve the problem caused by the heat shrinkage of the cylindrical label by hot air and water vapor as described above, for example, Patent Document 1 discloses a heat shrink device for shrink film that heats and shrinks the cylindrical label using high-temperature superheated steam. Has been.

  By heating and shrinking the shrink film using superheated steam in this way, the design and characters printed on the shrink film can be finished beautifully without distortion, and saturated steam can easily generate latent heat (evaporation enthalpy). However, superheated steam does not condense up to the saturation temperature even if part of the enthalpy is reduced due to label shrinkage due to the large enthalpy of the superheated steam. It is described that a cylindrical label can be attached without water droplets adhering to the surface.

  In addition, superheated steam has a larger heat capacity than saturated steam, and the shrink film can be instantly heat-shrinkable to the limit shrinkage rate, so the length of the heat treatment chamber can be shortened and space saving can be achieved. In addition, it is described that the supply amount to the heat treatment chamber can be reduced as compared with the case of saturated steam.

JP 2008-150063 A

  However, as described in Patent Document 1, the entire tubular shrink film is not heat-shrinked with superheated steam and is attached at a stretch, but depending on the shape of the article to which the shrink film is attached, the temperature is relatively low. A state where the shrink film is partly shrunk using the first water vapor to position the shrink film with respect to the article, and the other part of the shrink film is shrunk using the relatively high temperature of the second steam is a better wearing state. It may become. For example, when the article to which the shrink fill is attached is a cup container having a tapered side surface, if the entire shrink film is thermally shrunk at once, the attachment position of the shrink film is shifted from the desired position on the tapered side surface. Sometimes. Also, if there are ribs or recesses on the side of the article to reinforce or improve the design, if shrinking with superheated steam at once, the shrink film will be excessively engulfed and the design and characters on the film will be distorted In order to eliminate this, it may be preferable to use two-stage heat shrinkage with the first steam and the second steam.

  On the other hand, depending on the shape of the article to which the shrink film is attached, the shrink film is shrunk using the second steam for the part that needs to be largely heat shrunk, and the first steam is used for the other part. It may be better to use and shrink. For example, in the case of a container such as a beer bottle having a large diameter difference between the trunk and the neck near the mouth, for example, the shrink film is heat-shrinked with the second water vapor and closely adhered to the neck. It is preferable to heat shrink the portion using the first steam.

The object of the present invention is to use a combination of heat shrinkage due to the relatively low temperature first steam and heat shrinkage due to the relatively high temperature second steam depending on the shape of the article to which the shrink film is attached, An object of the present invention is to provide a method for producing a container with a shrink film, which can realize a suitable shrink film mounting state.

The manufacturing method of a container with a shrink film according to one aspect of the present invention is a bottle container in which a shrink film is heated and shrunk while being transported by a conveyor in a state where a tubular shrink film is fitted to a bottle container having a rib on a side surface. A shrink film-contained container manufacturing method to be attached to the periphery of the container, comprising: a partial shrinkage step for shrinking a part of the shrink film; and a shrinkage step performed downstream of the partial shrinkage step in the transport direction of the bottle container. An overall shrinking step for shrinking most of the entire film, and an additional shrinking step that is performed on the downstream side of the bottle container in the transport direction with respect to the overall shrinking step, and that further shrinks the shrinkage of the shrink film. In the partial contraction step and the additional contraction step, the first water vapor is used, In the overall contraction process, the second water vapor having a temperature higher than that of the first water vapor is used. The first water vapor is water vapor having a temperature of 100 ° C. or less under the condition of 1 atm. The second water vapor is based on 1 atm. Sometimes the temperature is higher than 100 ° C. and 300 ° C. or less, and in the partial shrinking step, the shrink film is partially shrunk by spraying the first water vapor onto the lower end of the shrink film. After positioning in the bottle container, the first water vapor is sprayed on a portion corresponding to the rib of the shrink film to shrink the shrink film so that it does not bite into the rib. The shrink film is made to shrink by spraying the second water vapor on the film from the bottom to the top in order to shrink the film. In the additional shrinking step, the first water vapor is sprayed onto the upper end of the shrink film corresponding to the shoulder where the diameter difference of the bottle container increases, and the heat shrinkage is additionally performed. The shrink film is in close contact with the shoulder .
Here, in the specification and claims of the present application , the second water vapor is preferably superheated water vapor at 120 ° C. to 300 ° C., more preferably 150 ° C. to 180 ° C.

In this case, in the additional shrinking step , the first water vapor is sprayed on the intermediate portion in the height direction of the shrink film to be additionally thermally shrunk, and the shrink film is applied to the constricted body of the bottle container. It may be in a close contact state.

The manufacturing method of the container with a shrink film which is another aspect of the present invention is a state in which a cylindrical shrink film is fitted on a beer bottle type bottle container having a large diameter difference between the trunk and the neck near the mouth. The shrink film is heated and shrunk while being conveyed by a conveyor, and the shrink film is attached to the periphery of the bottle container. The shrinking film is carried out on the downstream side in the transport direction of the bottle container and shrinks the entire shrink film, and the shrinking film is carried out on the downstream side in the transport direction of the bottle container with respect to the shrinking process. An additional contraction step for performing additional contraction on a portion where the contraction is insufficient. Water vapor is used, the second water vapor having a temperature higher than that of the first water vapor is used in the overall shrinkage step and the additional shrinkage step, and the first water vapor is water vapor having a temperature of 100 ° C. or less under the condition of 1 atm. The second water vapor is superheated water vapor having a temperature higher than 100 ° C. and lower than 300 ° C. based on 1 atm. In the partial shrinkage step, the first water vapor is sprayed on the lower end of the shrink film. The shrink film is partially shrunk to position the shrink film on the bottle container, and in the whole shrinking step, the shrinkage is caused by shrinking the shrink film by spraying the second water vapor from the bottom to the top in order. A film is attached to the bottle container, and in the additional shrinking step, the bottle container corresponds to a part from the shoulder to the neck where the diameter difference is large. The shrink film by blown the second steam to the upper portion is additionally thermal contraction, a state where the shrink film is brought into close contact with an outer peripheral surface of the over the neck from the shoulder portion of the bottle.

According to still another aspect of the present invention, there is provided a shrink film container manufacturing method in which a shrink film is conveyed by a conveyor in a state where a cylindrical shrink film is fitted to a cup container having a tapered side surface shape toward the bottom. A method of manufacturing a container with a shrink film that heat shrinks and attaches a film to the periphery of a cup container, the partial shrinking step of shrinking a part of the shrink film, and the transport direction of the cup container with respect to the partial shrinking step An overall contraction step that is performed on the downstream side and contracts a large part of the entire shrink film, and is performed on the downstream side in the transport direction of the cup container with respect to the overall contraction step, and the shrink film is insufficiently contracted. An additional contraction step for performing additional contraction, and the entire contraction step and the additional contraction process In the partial shrinking step, the second water vapor having a temperature higher than that of the first water vapor is used. The first water vapor is water vapor having a temperature of 100 ° C. or less under the condition of 1 atm. 2 water vapor is superheated water vapor whose temperature is higher than 100 ° C. and 300 ° C. or lower when 1 atm is used as a reference, and in the partial shrinking step, the second water vapor is sprayed on the lower end of the shrink film. The shrink film is positioned on the side surface of the cup container, and in the entire shrinking step, the shrinkage is performed by spraying the first water vapor on the shrink film in order from the bottom to the top. A shrink film is attached to the cup container, and in the additional shrinking step, the first water vapor is sprayed on an upper end portion of the shrink film to additionally Is contracted to the tight contact said shrink film is crowded bend site toward the bottom surface from the side of the cup container.

In this case, a heat-sensitive adhesive layer is provided on the inner surface of the lower end portion of the shrink film on the container opening side, and in the partial contraction step , the heat-sensitive adhesive that exhibits adhesiveness by spraying the second water vapor. The shrink film may be adhered and fixed to the side surface of the cup container by a layer.

In this case, as the heat shrinkage of the shrink film is equalized in the circumferential direction, such rotates the cup container may be fed et transportable.
Furthermore, in the method for manufacturing a container with a shrink film according to the present invention, hot water is blown on moisture or moisture which is carried out on the most downstream side in the container transport direction with respect to the additional shrinking step and adheres to the container with the shrink film. A drying step of removing may be included.

According to the method for manufacturing a container with a shrink film according to the present invention, the first steam having a temperature of 100 ° C. or less under the condition of 1 atm and 1 atm based on the shape of the article to which the shrink film is attached. The second steam, which is superheated steam whose temperature is higher than 100 ° C. and lower than 300 ° C., is preferably used by using a specific combination of the first and second steam in the thermal contraction in three steps. A shrink film can be attached.

It is a front view which shows roughly the whole heat shrink apparatus of the shrink film which is 1st Embodiment. It is AA sectional drawing in FIG. It is a front view which shows a pair of nozzle provided in a partial contraction zone. It is a front view which shows a pair of nozzle provided in the whole contraction zone. It is a front view which shows a pair of nozzle provided in an additional contraction zone. (A)-(e) is a figure which shows the state in which the shrink film with which a PET bottle is mounted | worn is heat-shrinked, and is mounted in steps. It is a front view which shows roughly the whole heat shrink apparatus of the shrink film which is 2nd Embodiment. (A)-(e) is a figure which shows the state in which a shrink film is heat-shrinked and mounted | worn in a beer bottle type container in the heat contraction apparatus of 2nd Embodiment in steps. It is a front view which shows roughly the whole heat shrink apparatus of the shrink film which is 3rd Embodiment. (A)-(d) is a figure which shows the state in which a shrink film is heat-shrinked and mounted | worn with a cup container in the heat contraction apparatus of 3rd Embodiment in steps.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  In the following description, the article to which the shrink film is attached is described as a bottle container such as a PET bottle or beer bottle that contains a beverage, or a cup container that contains food such as cup noodles. However, the present invention is not limited to this. Instead, any article may be used that is packaged by heat shrinking the shrink film and bringing it into close contact with the surroundings.

<First Embodiment>
FIG. 1 is a front view schematically showing an entire shrink film heating / shrinking apparatus (hereinafter, simply referred to as a heating / shrinking apparatus) 10 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG.

  The heating / shrinking device 10 is provided so as to surround the conveyor 2 that conveys the bottle container B on which the shrink film S is fitted, and is used for shrinking the shrink film S by heating and mounting it around the bottle container. The bottle containers B are continuously conveyed in the direction of arrow E in a state where the bottle containers B are placed on the conveyor 2 at a predetermined interval.

  A cylindrical shrink film S is fitted around the bottle container B (shown on the right side in FIG. 1) carried into the heat shrinking device 10 by the conveyor 2. The shrink film S is a film fitting device (not shown), in which a long cylindrical film cut into a predetermined length is opened in a substantially cylindrical shape, and a bottle container is placed inside the shrink film S opened in this state. It is fitted by inserting B. For the shrink film S, for example, a stretched polystyrene film, a high-shrinkage polyethylene terephthalate film, a general heat-shrinkable polyethylene terephthalate film, and the like are preferably used.

  The heat-shrink device 10 includes a tunnel-like cover 12 for forming a heat-shrink zone provided along the conveyor 2 that transports the bottle container B on which the shrink film S is fitted. The cover 12 is formed of, for example, a metal plate, and is provided so as to cover both sides and the upper side of the conveyor 2 as shown in FIGS. 1 and 2.

  The heating / shrinking device 10 is supported by a frame-like leg portion 14 and installed so as to be at an appropriate height position on the floor surface in the factory. A plurality of exhaust ducts 16 are provided on the ceiling portion of the cover 12 that constitutes the heat shrinking device 10. The exhaust duct 16 is for exhausting water vapor used inside the heat shrinking apparatus 10 to the outside. The water vapor exhausted from the exhaust duct 16 may be circulated and supplied to a steam generator to be described later. By doing in this way, the electric power and water used for generation | occurrence | production of water vapor | steam and a heating, and water can be saved, and there exists an advantage which can reduce resources and a running cost.

  The heat shrink device 10 is divided into three zones in which the shrinkage of the shrink film S fitted on the bottle container B is different. Specifically, the partial shrinkage zone Z1 for shrinking a part of the shrink film S fitted on the bottle container B in order from the upstream side in the transport direction of the bottle container B by the conveyor 2 is contracted. It is divided into an overall shrinkage zone Z2 to be made and an additional shrinkage zone Z3 to additionally shrink the shrinkage insufficient portion of the shrink film.

The heating / shrinking device 10 includes a steam generating device 18 and a steam heating device 20.
The steam generator 18 is for generating first steam to be supplied to the zones Z1 to Z3. The first water vapor of 100 ° C. or less generated by the steam generator 18 is supplied to the partial contraction zone Z1 and the additional contraction zone Z3 through the pipes 22 and 24, and is supplied to the steam heating apparatus 20 through the pipe 26. Is done.

  The steam heating device 20 is for heating the first steam supplied from the steam generator 18 at normal pressure to generate second steam (or superheated steam) at about 150 ° C. to 180 ° C. As the heating means for generating the second water vapor, for example, an electromagnetic heating induction type can be used. The 2nd water vapor | steam produced | generated by the steam heating apparatus 20 is supplied to the whole contraction zone Z2 via the piping 28. FIG.

  A plurality of windows 13 are formed on at least one side surface of the cover 12 of the heat shrinking device 10. In the present embodiment, two windows 13 are provided in each of the zones Z1 to Z3. The window 13 is configured by disposing a transparent plate made of, for example, glass or resin in a substantially rectangular opening formed on the side surface of the cover 12. Thereby, the operator of the heating / shrinking apparatus 10 can confirm the shrinkage state of the shrink film S inside the window Z13 by directly viewing each zone Z1 to Z3 or by an image taken by a camera.

  In addition, a pair of handles 30 and a knob 32 are provided on the cover 12 of the heat-shrink device 10. The handle 30 and the knob 32 are for enabling an operator to adjust the state of spraying water vapor by a nozzle, which will be described later, from the outside of the cover. The details will be described next with reference to FIG. 3 in addition to FIG.

  FIG. 3 is a front view showing the nozzle pair 34 provided in the partial contraction zone Z <b> 1 of the heating and contracting apparatus 10. In this embodiment, nozzle pairs 34 as shown in FIG. 2 are arranged along the longitudinal direction of the conveyor 2 on both sides of the conveyor 2, but only one nozzle pair 34 is shown in FIG. 3. Yes.

  As shown in FIG. 2, in the partial contraction zone Z1 of the heat contraction apparatus 10, nozzle pairs 34 are respectively installed on both sides of the conveyor 2. The nozzle pair 34 sprays the first water vapor of 100 ° C. or less supplied from the steam generator 18 through the pipe 22 onto a part of the shrink film S fitted in the bottle container B conveyed by the conveyor 2. It is designed to contract.

  More specifically, the nozzle pair 34 has two nozzle members 34a and 34b as shown in FIG. Each nozzle member 34a, 34b is configured by a rectangular metal tube, and nozzle holes 36 are formed in a line on the side surface facing the conveyor 2. In the partial shrinkage zone Z1 of the heating and shrinking apparatus 10 according to the present embodiment, the nozzle members 34a and 34b have shrink films S in which the rows of nozzle holes 36 are along the container transport direction by the conveyor 2 and are fitted to the bottle containers B. It is installed in the direction facing the lower end of the.

  The shape, size, arrangement pitch, and the like of the nozzle holes 36 can be appropriately set according to the thermal shrinkage characteristics of the shrink film S. Further, the side surface in which the nozzle hole 36 is formed is configured as a nozzle plate attached to the nozzle members 34a and 34b with bolts or the like, and by changing the nozzle plate, the spraying amount of the first water vapor is changed. Also good.

  As shown in FIGS. 2 and 3, the nozzle members 34 a and 34 b are attached to a lower end portion of a bracket 38 having a substantially L-shaped front shape by bolting. The mounting holes 40 of the nozzle members 34a and 34b formed in the bracket 38 are formed as long holes having a substantially arc shape. As a result, the bolt can be moved in the mounting hole 40 with the bolt loosened. As a result, the nozzle members 34a and 34b can be rotated with respect to the bracket 38 to individually adjust the angle. ing.

  The upper part of the bracket 38 to which the nozzle members 34a and 34b are attached extends elongated upward, and a rack 42 is formed on one side edge thereof. A pinion gear 44 is engaged with the rack 42. Although not shown in FIG. 2, the pinion gear 44 is fixed to a shaft member 46 that is connected to a handle 30 provided outside the cover 12 and is rotatably supported in the heating / shrinking device 10. .

  Further, a support frame 50 is erected on the leg portion 14 inside the heat shrinking apparatus 10, and a support plate 52 extends in a direction perpendicular to the container conveying direction by the conveyor 2 on the support frame 50. It is attached to exist. An upper portion of a substantially T-shaped nozzle holding plate 54 is attached to the support plate 52 with bolts 55. A lower portion 56 of the support plate 52 extends downwardly, and a bracket 38 to which the nozzle members 34a and 34b are attached is provided on the lower portion 56 so that the bracket 38 can move while being guided upward. Yes.

  With such a configuration, when the operator rotates the handle 30 outside the cover, the pinion gear 44 rotates through the shaft member 46, and the rack 42 moves in the vertical direction according to the rotation. Thereby, the height position of the nozzle members 34a and 34b, that is, the spray position of the first water vapor in the axial direction of the cylindrical shrink film S can be individually adjusted.

  Further, the upper portion of the nozzle holding plate 54 is attached to the support plate 52 by a bolt 55 so as to be slidable. The two nozzle holding plates 54 that respectively hold the nozzle pairs 34 installed on both sides of the conveyor 2 are connected to a support plate 52 by a link mechanism 58 that is rotatably supported. The end of the knob 32 extending from the outside of the cover 12 to the inside of the heat shrinking apparatus 10 is connected to the upper end edge of the nozzle holding plate 54 on the front side of the conveyor 2.

  With such a configuration, when the operator of the heating / shrinking apparatus 10 pushes the knob 32, the two nozzle holding plates 54 move in a direction approaching each other via the link mechanism 58, and when the knob is pulled, The nozzle holding plate 54 moves away from each other. Thereby, in this embodiment, the distance D between the nozzle members 34a and 34b and the shrink film S fitted to the bottle container B can be adjusted from the outside of the cover 12. This can be said that the first water vapor sprayed from the nozzle members 34a and 34b spreads away from the nozzle members 34a and 34b, so that the spray width of the first water vapor on the shrink film S can be adjusted.

  Next, with reference to FIG. 4, the whole shrinkage zone Z2 of the heating and shrinking apparatus 10 will be described. FIG. 4 is a front view showing the nozzle pair 34 provided in the entire contraction zone Z2. The angle adjustment mechanism, the height adjustment mechanism, and the spray width adjustment mechanism of the nozzle pair 34 in the entire contraction zone Z2 are the same as those in the partial contraction zone Z1, and thus the description thereof is omitted. The difference here is that the nozzle holes of the nozzle member are formed in several rows and that the second water vapor is sprayed onto the shrink film S, so only these will be described.

  The nozzle pair 34 in the entire contraction zone Z2 includes two nozzle members 34c and 34d. For example, 4 to 6 rows of nozzle holes 36 are provided in the vertical direction on the side surface of each nozzle member 34c, 34d facing the conveyor 2 side. Thus, by arranging the nozzle holes 36 in several rows, a large spray area (or spray width) in the axial direction of the shrink film S can be secured.

  Further, in the entire contraction zone Z2, the two nozzle members 34c and 34d are set so as to be aligned in a straight line at a predetermined angle with respect to the conveyor 2. More specifically, the superheated steam is sprayed from the bottom to the top on the shrink film S around the bottle container B conveyed by the conveyor 2 so that the shrink film S is thermally shrunk to be in close contact with the bottle container B. I try to wear it in the state that I did.

  Next, with reference to FIG. 5, the additional shrinkage zone Z3 in the heating and shrinking apparatus 10 will be described. FIG. 5 is a front view showing the nozzle pair 34 provided in the additional shrinkage zone of the heat shrinking apparatus 10. Since the configuration of the additional contraction zone Z3 is the same as that of the partial contraction zone Z1 including the configuration of the nozzle members 34a and 34b and the use of the first water vapor, the description thereof is not repeated here.

  As shown in FIG. 5, the two nozzle members 34 a and 34 b included in the nozzle pair 34 are respectively installed in parallel to the container conveying direction by the conveyor 2 at different height positions. As described above, the additional shrinkage zone Z3 is a region for additionally shrinking the shrinkage insufficient portion of the shrink film S. Therefore, in FIG. 5, the nozzle member 34 a located on the upstream side in the container transport direction (arrow E direction) of the two nozzle members 34 a and 34 b is the middle in the vertical direction of the shrink film S fitted on the bolt container B. An example is shown in which the nozzle hole 36 is set at a height position so that the first water vapor is ejected toward the position. Further, the nozzle member 34b located on the downstream side sprays the first water vapor on the upper end portion of the shrink film S, and the portion of the shrink film S that is steeply inclined from the body portion of the bottle container B toward the mouth portion. An example of contraction so that the upper end portion is in close contact is shown.

  Then, with reference to FIG. 6, the mounting | wearing operation | movement by the thermal contraction of the shrink film in the heat contraction apparatus 10 which has the said structure is demonstrated. FIGS. 6A to 6E are diagrams showing, in a stepwise manner, a state in which the shrink film S attached to the bottle container B which is, for example, a PET bottle is attached by being thermally contracted.

  As shown in FIG. 6A, the bottle container B fitted with the unshrinked shrink film S is first carried into the partial shrinkage zone Z <b> 1 of the heating shrinkage device 10 by the conveyor 2.

  While passing through the partial contraction zone Z1, the first water vapor ejected from the nozzle holes 36 of the nozzle members 34a and 34b is sprayed onto the lower end portion of the shrink film S located on the outer periphery of the lower end portion of the bottle container B. Thereby, as shown in FIG.6 (b), the lower end part of the shrink film S heat-shrinks and contacts the outer peripheral surface of the bottle container B, and is fixed. As a result, the position of the shrink film S in the axial direction with respect to the bottle container B is determined.

  Further, when the side surface of the bottle container B has ribs (or stepped portions) or recesses for reinforcing and improving design, for example, the downstream nozzle member 34b of the two nozzle members 34a and 34b is used as the stepped portion. You may set to the corresponding height position. By doing in this way, the part corresponding to the rib of the shrink film S can be made into the state contracted a little. As a result, if the shrink film S is heat-shrinked at a stroke by superheated steam, the shrink film S is excessively engulfed, and the design and characters printed on the film may be greatly distorted. The state of biting of the film can be relaxed by heat shrinking in two stages, zone Z1 and the next overall shrinkage zone Z2.

  Subsequently, the bottle container B is conveyed by the conveyor 2 and passes through the entire shrinkage zone Z2. During this time, the second water vapor ejected from the nozzle holes 36 of the nozzle members 34c, 34d is entirely sprayed in order from the bottom to the top onto the shrink film S fitted in the bottle container B. Thereby, as shown in FIGS. 6 (c) and 6 (d), the shrink film S is thermally contracted as a whole from the lower end side to the upper end side in close contact with the outer peripheral surface of the bottle container B to form the bottle container B. Will be installed. Here, since the second water vapor sprayed onto the shrink film S has a larger heat capacity than the first water vapor, the shrink film S can be instantaneously contracted with a large contraction rate, and the first water vapor contracts. Water drops do not adhere to the shrink film S and the bottle container B as in the case of making them.

  And the bottle container B which the whole shrink film S thermally contracted in the whole shrinkage | contraction zone Z2 is conveyed by the conveyor 2, and passes the additional shrinkage | contraction zone Z3 which is the last zone. In the additional shrinkage zone Z3, the first water vapor ejected from the nozzle holes 36 of the nozzle members 34a and 34b is sprayed toward a portion where shrinkage is insufficient in the shrink film S after passing through the entire shrinkage zone Z2.

  Here, as shown in FIG. 6 (d), an example in which the upper end S <b> 1 of the shrink film S, which is a portion corresponding to the shoulder where the diameter difference of the bottle container B is large, is not sufficiently adhered to the bottle container B. Indicates. Therefore, in the additional shrinkage zone Z3, the first water vapor is sprayed toward the upper end portion of the shrink film S to be further thermally shrunk so that the outer peripheral surface of the bottle container B is sufficiently adhered. Can do.

  In addition, as shown by the alternate long and short dash line in FIG. 6A, when the body portion of the bottle container B is constricted, the second shrinkage zone Z3 is directed toward the middle portion in the height direction of the shrink film S. 1 water vapor may be sprayed and additionally heat-shrinked so as to be in close contact with the bottle container B.

  Thus, the bottle container B to which the shrink film S is attached after passing through the three zones Z1 to Z3 of the heating and shrinking device 10 is carried out of the heating and shrinking device 10 by the conveyor 2 and is then transferred to a subsequent process such as boxing. It is conveyed.

  As described above, according to the heat shrink device 10 of the shrink film of the present embodiment, the heat shrink due to the relatively low temperature first steam and the relatively high temperature according to the shape of the bottle container B to which the shrink film S is attached. A suitable wearing state of the shrink film S can be realized by using in combination with heat shrinkage by the second water vapor.

  Specifically, with respect to the shrink film S fitted in the bottle container B, the lower end portion is thermally contracted using the first water vapor and positioned and fixed, and the whole is quickly contracted using the second water vapor and the mounted state. Finally, the shrinkage film S can be mounted in a beautiful state by using the first water vapor to perform additional shrinkage so as to compensate for the shrinkage insufficient portion.

  Further, by using the first water vapor instead of the second water vapor in the partial shrinkage zone Z1 and the additional shrinkage zone Z3, positioning of the shrink film S by moderate shrinkage, biting mitigation, and finishing of the mounted state can be performed.

  Furthermore, since the second water vapor is used in the entire shrinkage zone Z2 in the heating and shrinking apparatus 10 of the present embodiment, the operator can shrink the shrink film S through the window 13 as compared with the case of the first water vapor that is in a poor visibility state due to steam. The contraction state of can be clearly confirmed. Therefore, the shrinkage state of the shrink film S is easily adjusted by operating at least one of the handle 30 and the knob 32 so that the first water vapor is sprayed in the additional shrinkage zone Z3 toward the shrinkage insufficient portion of the shrink film S. Can do.

  In the present embodiment, the shrink film S is contracted from the bottom to the top in the entire contraction zone Z2 of the heat contraction apparatus 10, but the nozzle members 34c and 34d are inclined in the opposite direction (that is, downstream in the container transport direction). The shrink film S may be contracted from the top to the bottom. In this case, in the partial shrinkage zone Z1, it is preferable that the upper end portion of the shrink film S is thermally contracted and positioned and fixed.

Second Embodiment
Next, with reference to FIG. 7 and FIG. 8, 10 A of heat contraction apparatuses of 2nd Embodiment are demonstrated. FIG. 7 is a front view schematically showing the entire shrink film heating / shrinking apparatus 10A according to the second embodiment. FIGS. 8A to 8E are diagrams showing in stages the state in which the shrink film is heat-shrinked and attached to the beer bottle-type container B in the heat-shrink device 10A. The heating / shrinking apparatus 10A of the present embodiment has a configuration that is substantially the same as that of the first embodiment, and therefore, the same components are denoted by the same reference numerals and will not be described repeatedly, but mainly the differences will be described.

  In the heating / shrinking apparatus 10A of this embodiment, as shown in FIG. 7, the second steam is supplied from the steam heating apparatus 20 to the additional contraction zone Z3 via the pipe 28 and ejected from the nozzle members 34a and 34b. It has become. In addition, the article on which the shrink film S is fitted in the heating / shrinking apparatus 10A of the present embodiment is a beer bottle type bottle container B, specifically, a shape having a large difference in diameter between the trunk and the vicinity of the mouth. The container.

  Then, with reference to FIG. 8, the mounting | wearing operation | movement by the thermal contraction of the shrink film in the heat contraction apparatus 10A of this embodiment is demonstrated.

  As shown in FIG. 8A, the bottle container B fitted with the unshrinked shrink film S is first carried into the partial shrinkage zone Z1 of the heating shrinkage device 10A by the conveyor 2.

  And the 1st water vapor | steam ejected from the nozzle hole 36 of nozzle member 34a, 34b is sprayed on the lower end part of the shrink film S located in the outer periphery of the lower end part of the bottle container B, while passing through the partial contraction zone Z1. Thereby, as shown in FIG.8 (b), the lower end part of the shrink film S heat-shrinks, contacts the outer peripheral surface of the bottle container B, and is fixed. As a result, the position of the shrink film S in the axial direction with respect to the bottle container B is determined.

  Subsequently, the bottle container B is conveyed by the conveyor 2 and passes through the entire shrinkage zone Z2. During this time, the second water vapor ejected from the nozzle holes 36 of the nozzle members 34c, 34d is entirely sprayed in order from the bottom to the top onto the shrink film S fitted in the bottle container B. Thereby, as shown in FIGS. 8C and 8D, the shrink film S is heat-shrinked in order from the lower end side to the upper end side, and is closely attached to the outer peripheral surface of the bottle container B. become.

  Then, the bottle container B in which the entire shrink film S is thermally contracted in the entire contraction zone Z2 is conveyed by the conveyor 2 and passes through the additional contraction zone Z3 which is the last zone. In the additional shrinkage zone Z3, the second water vapor ejected from the nozzle holes 36 of the nozzle members 34a and 34b is sprayed toward a portion where the shrinkage is insufficient in the shrink film S after passing through the entire shrinkage zone Z2.

  Here, as shown in FIG. 8 (d), the upper end S <b> 2 of the shrink film S, which corresponds to the portion from the shoulder to the neck where the diameter difference of the bottle container B increases, has a close contact degree with the bottle container B. An example is insufficient. Accordingly, in the additional shrinkage zone Z3, the second water vapor is sprayed toward the upper end portion of the shrink film S to be additionally firmly heat-shrinked so that the outer peripheral surface of the bottle container B is sufficiently adhered. be able to.

  Thus, also in the heat shrink apparatus 10A of the shrink film of this embodiment, the heat | fever by the 1st water vapor | steam of comparatively low temperature according to the shape of the bottle container B with which the shrink film S is mounted | worn similarly to 1st Embodiment. A suitable mounting state of the shrink film S can be realized by using the combination of the shrinkage and the heat shrinkage by the relatively high temperature second steam.

  Specifically, with respect to the shrink film S fitted in the bottle container B, the lower end portion is thermally contracted using the first water vapor and positioned and fixed, and the whole is quickly contracted using the second water vapor and the mounted state. Finally, the shrinkage film S can be mounted in a beautiful state by using the second water vapor to perform additional shrinkage so as to compensate for the shrinkage insufficient portion.

  Moreover, in the partial shrinkage | contraction zone Z1, positioning of the shrink film S by moderate shrinkage | contraction can be performed by using 1st water vapor | steam instead of 2nd water vapor | steam.

  Furthermore, since the second water vapor is used in the entire shrinkage zone Z2 in the heating and shrinking apparatus 10 of the present embodiment, the operator can shrink the shrink film S through the window 13 as compared with the case of the first water vapor that is in a poor visibility state due to steam. The contraction state of can be clearly confirmed. Therefore, the shrinkage state of the shrink film S is easily adjusted by operating at least one of the handle 30 and the knob 32 so that the second water vapor is sprayed in the additional shrinkage zone Z3 toward the shrinkage insufficient portion of the shrink film S. Can do.

<Third Embodiment>
Next, with reference to FIG. 9 and FIG. 10, the heating contraction apparatus 10B of 3rd Embodiment is demonstrated. FIG. 9 is a front view schematically showing the entirety of the heating and shrinking apparatus 10B of the third embodiment.
FIGS. 10A to 10D are diagrams showing stepwise the state in which the shrink film is heat-shrinked and attached to the cup container C in the heat-shrink device 10B. The heating / shrinking apparatus 10B of the present embodiment has substantially the same configuration as that of the first embodiment, and therefore, the same components will be described using the same reference numerals and will not be described repeatedly, but mainly the differences will be described.

  In the heating / shrinking apparatus 10B of the present embodiment, as shown in FIG. 9, the second steam is supplied from the steam heating apparatus 20 via the pipe 28 in the partial contraction zone Z1 and ejected from the nozzle members 34a, 34b. It has become. Further, in the entire contraction zone Z2, the first water vapor is supplied from the steam generator 18 via the pipe 25 and is ejected from the nozzle members 34c and 34d. Note that the first water vapor is used in the additional contraction zone Z3 as in the case of the first embodiment.

  Furthermore, in this embodiment, the cup container C is fitted on the jig 4 conveyed by the conveyor 2 with the bottom portion facing up. In this manner, the cylindrical shrink film S is fitted around the side surface of the cup container C held by the jig 4, and is carried into the heating and shrinking device 10 </ b> B by the conveyor 2.

  Here, the cup container C is a resin container for containing food such as yogurt, for example, and a heat-sensitive adhesive layer is provided on the inner surface of the end of the shrink film S to be fitted on the container opening side. It is provided in advance.

  In addition, you may comprise so that the container holding | maintenance part of the jig 4 may be rotated while conveying the inside of the heat contraction apparatus 10B. If it does in this way, the thermal contraction of the shrink film S can be performed uniformly in the circumferential direction, and it can prevent or suppress mounting | wearing with the state which wrinkled locally.

  Then, with reference to FIG. 10, the mounting | wearing operation | movement by the thermal contraction of the shrink film S in the heat contraction apparatus 10B of this embodiment is demonstrated.

  As shown in FIG. 10A, the cup container C fitted with the unshrinked shrink film S is first carried into the partial shrinkage zone Z1 of the heating shrinkage device 10B by the conveyor 2.

  And the 2nd water vapor | steam ejected from the nozzle hole 36 of the nozzle members 34a and 34b is sprayed on the lower end part of the shrink film S located in the outer periphery of the lower end part of the bottle container B, while passing through the partial contraction zone Z1. As shown in FIG. 10B, the lower end portion of the shrink film S is thermally contracted as a result of the second water vapor having a high heat capacity at a high temperature, and the film shown as a stipple region in FIG. The inner heat-sensitive adhesive layer is activated and develops tackiness. Thereby, the lower end part of the shrink film S is adhered and fixed to the container side face at a position adjacent to the flange part of the cup container C. As a result, even in the cup container C having a tapered side shape, the shrink film S can be mounted at a desired position without being displaced in the axial direction. In addition, since the side surface of the cup container C facing the lower end of the shrink film S is flat and has no recess, there is no problem of excessive film biting into the recess or the like even if it is thermally contracted with high-temperature second steam. .

  Subsequently, the cup container C is conveyed by the conveyor 2 and passes through the entire shrinkage zone Z2. During this time, the first water vapor ejected from the nozzle holes 36 of the nozzle members 34c and 34d is entirely sprayed in order from the bottom to the top onto the shrink film S fitted in the cup container C. As a result, the shrink film S is attached in close contact with the outer peripheral surface of the cup container C by being thermally contracted in order from the lower end side to the upper end side, as shown in FIGS. become.

  Then, the cup container C in which the entire shrink film S is thermally contracted in the entire contraction zone Z2 is conveyed by the conveyor 2 and passes through the additional contraction zone Z3 which is the last zone. In the additional shrinkage zone Z3, the first water vapor ejected from the nozzle holes 36 of the nozzle members 34a and 34b is sprayed toward a portion where shrinkage is insufficient in the shrink film S after passing through the entire shrinkage zone Z2.

  Here, as shown in FIGS. 10C and 10D, the additional shrinkage zone Z3 is set such that the upper end S2 of the shrink film S corresponding to the portion from the side surface to the bottom surface of the cup container C is bent and adhered. Then, it is preferable to heat-shrink additionally by spraying 1st water vapor | steam toward the upper end part of the shrink film S. FIG.

  As described above, in the shrink film heating / shrinking device 10B of the present embodiment as well, as in the first and second embodiments, the relatively low temperature of the second shrinkage device 10B according to the shape of the cup container C on which the shrink film S is mounted. By using a combination of heat shrinkage due to one water vapor and heat shrinkage due to relatively high temperature second water vapor, a suitable mounting state of the shrink film S can be realized.

  Specifically, the shrink film S fitted in the cup container C is heat-shrinked and bonded and fixed by using the second steam, and the entire film is shrunk and attached using the first steam. It is possible to finish the shrink film S in a beautiful state by setting the state and finally performing additional shrinkage using the first water vapor so as to compensate for the shrinkage insufficient portion.

  Further, in the partial shrinkage zone Z1, by using the second water vapor instead of the first water vapor, the thermal shrinkage and the activation of the heat-sensitive adhesive layer can be caused at the lower end portion of the shrink film S to be positioned. .

  In addition, the shrinkage | contraction apparatus of the shrink film which concerns on this invention is not limited to the structure of the 1st thru | or 3rd embodiment mentioned above, and its modification, Of course, a various improvement and a change are possible. is there.

  For example, in the heating and shrinking apparatuses 10 and 10B according to the first and third embodiments, in order to remove moisture or moisture attached when passing through the additional shrinkage zone Z3 using the first steam, For example, a drying zone using a hot air heater or the like may be provided in the downstream side. If it does in this way, the container with which the shrink film was mounted | worn can be immediately supplied to a post process in the dried state.

  In each of the heating and shrinking devices 10, 10 </ b> A, and 10 </ b> B, the additional shrinking zone Z <b> 3 may be omitted as long as the shrink film S can be sufficiently shrunk by heating in the entire shrinking zone Z <b> 2. In such a case, there is an advantage that the installation space for the heat shrinking device is reduced and the amount of water vapor to be used can be reduced to save energy.

  In the above description, in the additional shrinkage zone Z3, the first water vapor or the second water vapor is sprayed to additionally shrink the shrink film S. However, the present invention is not limited to this, and the nozzle member 34a is not limited thereto. , 34b, hot air that is high-temperature air may be ejected and sprayed onto the shrinkage-insufficient portion of the shrink film.

  Further, in the above description, it has been described that both the height position and the spray width of the nozzle member can be adjusted from the outside of the cover. However, the present invention is not limited to this, and at least one of the nozzle members is adjustable. Also good.

  Furthermore, in the above description, it has been described that the two nozzle members 34a, 34b or 34c, 34d of the nozzle pair 34 provided in each of the zones Z1 to Z3 are configured to be individually adjustable in height position and angle. However, the present invention is not limited to this, and at least one of them may be individually adjustable.

2 Conveyor 4 Jig 10, 10A, 10B Shrink film heating / shrinking device 12 Cover 13 Window 14 Leg 16 Exhaust duct 18 Steam generating device 20 Steam heating device 22, 24, 25, 26, 28 Piping 30 Handle 32 Knob 34 Nozzle pair 34a, 34b, 34c, 34d Nozzle member 36 Nozzle hole 38 Bracket 40 Mounting hole 42 Rack 44 Pinion gear 46 Shaft member 50 Support frame 52 Support plate 54 Nozzle holding plate 55 Bolt 56 (Nozzle holding plate) Lower part 58 Link mechanism B Bottle container C Cup container D Distance S Shrink film S1, S2 Upper end Z1 Partial shrinkage zone Z2 Whole shrinkage zone Z3 Additional shrinkage zone

Claims (7)

A method of manufacturing a container with a shrink film, which is heated and shrunk while being transported by a conveyor in a state where a cylindrical shrink film is fitted to a bottle container having ribs on the side surface, and is mounted around the bottle container,
A partial shrinkage step for shrinking a part of the shrink film, a whole shrinkage step for shrinking a large part of the entire shrink film, which is carried out downstream of the partial shrinkage step in the transport direction of the bottle container; An additional shrinking step, which is performed on the downstream side in the conveyance direction of the bottle container with respect to the process, and performs additional shrinkage on a portion where shrinkage is insufficient with respect to the shrink film,
In the partial shrinkage step and the additional shrinkage step, the first water vapor is used, and in the overall shrinkage step, the second water vapor having a temperature higher than that of the first water vapor is used, and the first water vapor has a temperature of 100 ° C. under the condition of 1 atm. The second water vapor is superheated water vapor whose temperature is higher than 100 ° C. and lower than 300 ° C. when the standard is 1 atm.
In the partial shrinking step, after the first water vapor is sprayed onto the lower end of the shrink film to partially shrink it, the shrink film is positioned on the bottle container, and then the portion corresponding to the rib of the shrink film. The first water vapor is sprayed to shrink the shrink film so that it does not bite into the ribs;
In the overall shrinking step, the shrink film is attached to the bottle container by shrinking the shrinkage by generally spraying the second water vapor sequentially from the bottom to the shrink film,
In the additional shrinking step, the first water vapor is sprayed onto the upper end portion of the shrink film corresponding to the shoulder portion where the diameter difference of the bottle container becomes large, and the shrink film is additionally shrunk to the shoulder portion. Make it in close contact,
Manufacturing method of container with shrink film. In the manufacturing method of the container with a shrink film of Claim 1,
In the additional shrinking step , the first water vapor is sprayed onto the intermediate portion in the height direction of the shrink film to additionally heat shrink, and the shrink film is in close contact with the constricted body of the bottle container The manufacturing method of the container with a shrink film. Around the bottle container, the shrink film is heated and shrunk while being transported by a conveyor while the cylindrical shrink film is fitted in a beer bottle type bottle container with a large diameter difference between the body and the neck near the mouth. A manufacturing method of a container with a shrink film to be attached to
A partial shrinkage step for shrinking a part of the shrink film, a whole shrinkage step for shrinking a large part of the entire shrink film, which is carried out downstream of the partial shrinkage step in the transport direction of the bottle container; An additional shrinking step, which is performed on the downstream side in the conveyance direction of the bottle container with respect to the process, and performs additional shrinkage on a portion where shrinkage is insufficient with respect to the shrink film,
In the partial contraction step, the first steam is used, and in the total contraction step and the additional contraction step, the second steam having a temperature higher than that of the first steam is used. The first steam has a temperature of 100 ° C. under the condition of 1 atm. The second water vapor is superheated water vapor whose temperature is higher than 100 ° C. and lower than 300 ° C. when the standard is 1 atm.
In the partial shrinkage step, the shrink film is partially shrunk by spraying the first water vapor on the lower end of the shrink film, and the shrink film is positioned on the bottle container,
In the overall shrinking step, the shrink film is attached to the bottle container by shrinking the shrinkage by generally spraying the second water vapor sequentially from the bottom to the shrink film,
In the additional shrinking step, the second water vapor is sprayed to the upper end portion of the shrink film corresponding to a portion from the shoulder portion to the neck portion where the diameter difference of the bottle container is large, and the bottle container is additionally thermally shrunk, The shrink film is in close contact with the outer peripheral surface from the shoulder to the neck.
Manufacturing method of container with shrink film. A container with a shrink film that is attached to the periphery of a cup container by shrinking the shrink film while being transported by a conveyor with a cylindrical shrink film fitted to a cup container having a tapered side shape toward the bottom A manufacturing method comprising:
A partial shrinkage step for shrinking a part of the shrink film, a whole shrinkage step for shrinking a large part of the whole shrink film, which is carried out downstream of the partial shrinkage step in the transport direction of the cup container; An additional shrinking step, which is performed on the downstream side in the transport direction of the cup container with respect to the process, and performs additional shrinkage on a portion where shrinkage is insufficient with respect to the shrink film,
The first water vapor is used in the whole shrinkage step and the additional shrinkage step, the second water vapor having a temperature higher than the first water vapor is used in the partial shrinkage step, and the temperature of the first water vapor is 100 ° C. under the condition of 1 atm. The second water vapor is superheated water vapor whose temperature is higher than 100 ° C. and lower than 300 ° C. when the standard is 1 atm.
In the partial shrinking step, the shrink film is positioned on the side surface of the cup container by partially shrinking by spraying the second water vapor to the lower end of the shrink film,
In the entire shrinking step, the shrink film is attached to the cup container by shrinking the shrinkage by generally spraying the first water vapor sequentially from the bottom to the shrink film,
In the additional shrinking step, the first water vapor is sprayed onto the upper end portion of the shrink film to be additionally thermally shrunk, and the shrink film is bent and adhered to a portion from the side surface to the bottom surface of the cup container. To
Manufacturing method of container with shrink film. In the manufacturing method of the container with a shrink film of Claim 4,
A heat-sensitive adhesive layer is provided on the inner surface of the lower end portion of the shrink film on the container opening side, and in the partial shrinkage step , the heat-sensitive adhesive layer that exhibits adhesiveness by spraying the second water vapor A method for manufacturing a container with a shrink film, wherein the shrink film is bonded and fixed to the side surface of the cup container. In the manufacturing method of the container with a shrink film of Claim 4 or 5,
Wherein as the heat shrinkage of the shrink film is equalized in the circumferential direction, wherein a cup container is rotated will be sent al transportable method for producing a shrink film with containers. In the manufacturing method of the container with a shrink film as described in any one of Claims 1, 2, and 4-6,
A method for producing a container with a shrink film, comprising: a drying step that is carried out on the most downstream side in the container transport direction with respect to the additional shrinking step, and that removes moisture or moisture adhering to the container with a shrink film by spraying hot air.

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