WO2014208155A1

WO2014208155A1 - Shrink film heat-shrinking device

Info

Publication number: WO2014208155A1
Application number: PCT/JP2014/058057
Authority: WO
Inventors: 晶植月
Original assignee: 株式会社フジシールインターナショナル
Priority date: 2013-06-28
Filing date: 2014-03-24
Publication date: 2014-12-31
Also published as: JPWO2014208155A1; JP6405571B2

Abstract

The present invention achieves ideal fitting of shrink film by using a combination of heat-shrinking with a first steam of a relatively low temperature and heat-shrinking with a second steam of a relatively high temperature according to the shape of the article on which the shrink film is to be fitted. A shrink film heat-shrinking device (10) for fitting a shrink film (S) around an article (B) by shrinking the film using heat. The device is provided with a partial shrinkage zone (Z1) for shrinking a portion of the shrink film and an overall shrinkage zone (Z2) for shrinking the majority of the whole shrink film. In the partial shrinkage zone (Z1), the shrink film is fixed to the article by spraying a first steam of a relatively low temperature on the shrink film to partially shrink the film. In the overall shrinkage zone (Z2), the shrink film is fitted on the article by spraying a second steam of a relatively high temperature on the shrink film to shrink the film overall.

Description

Shrink film heat shrink device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat shrink device for shrink film, and more particularly, a heat shrink device for 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. About.

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, the 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 with hot air, the air heated to about 100 to 200 ° C. by the heater is locally sprayed onto the cylindrical label fitted to the container, so that the entire cylindrical label is 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 heat shrink device for a shrink film capable of realizing a suitable shrink film mounting state.

The shrinkage apparatus for shrink film according to the present invention is provided to surround a conveyor that conveys an article on which the shrink film is fitted, and the shrink film is shrinked by heating to be attached around the article. An apparatus comprising: a partial shrinkage zone for shrinking a part of the shrink film; and a whole shrinkage zone for shrinking a large part of the entire shrink film, wherein the shrink film has a relatively low temperature in the second shrinkage zone. One of one steam and a relatively high temperature second steam is sprayed and partially contracted to fix the shrink film to the article. In the entire contraction zone, the first steam and the second steam are applied to the shrink film. By spraying the other side of the water vapor and shrinking it as a whole, The ink film is intended to be attached to the article.
Here, in the specification and claims of the present application, the “first water vapor” is water vapor having a temperature of 100 ° C. or less under the condition of 1 atm. In the specification and claims of the present application, “second steam” is superheated steam having a temperature higher than 100 ° C. and lower than or equal to 300 ° C., preferably from 120 ° C. to 300 ° C. The superheated steam at 150 ° C., more preferably 150 ° C. to 180 ° C.

The shrink shrink apparatus for shrink film according to the present invention further comprises an additional shrink zone that is provided on the downstream side in the conveying direction of the article with respect to the entire shrink zone, and additionally shrinks a portion of the shrink film where shrinkage is insufficient. In the additional contraction zone, the first water vapor, the second water vapor, or hot air may be used.

Also, in the heat shrink apparatus for shrink film according to the present invention, the article is a PET bottle, the first water vapor in the partial shrink zone, the second water vapor in the whole shrink zone, and the first water in the additional shrink zone. Water vapor may be used respectively.

Also, in the heat shrink apparatus for shrink film according to the present invention, the entire shrink zone has a cover that covers both sides and the upper side of the conveyor, and a state in which the shrink film is entirely shrunk from the outside. You may have a window which can be observed through this.

In this case, the height position and spray width of a nozzle that sprays the first water vapor, the second water vapor, or the hot air toward the shrink film in the additional shrinkage zone according to the observation result through the window. At least one of the above may be configured to be adjustable from the outside of the cover.

Furthermore, in the heat shrinkable apparatus for shrink film according to the present invention, the nozzle for spraying the first water vapor or the second water vapor onto the shrink film is constituted by a pair of nozzle members arranged side by side in the conveyance direction of the article. The pair of nozzle members may be configured such that the height position and the angle with respect to the horizontal direction can be individually adjusted.

According to the heat shrink device for shrink film according to the present invention, heat shrink by relatively low temperature first steam and heat shrink by relatively high temperature second steam depending on the shape of the article to which the shrink film is attached. By using in combination, a suitable shrink film mounting state can be realized.

It is a front view which shows roughly the whole heat shrink apparatus of the shrink film which is 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line AA 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 in a beer bottle type container in the heat shrinking apparatus of the second embodiment. 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 mounted in a cup container by heat shrinking in a stepwise manner in the heat shrinking apparatus of the third embodiment.

Hereinafter, embodiments of 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 the entirety of a shrink film heating / shrinking apparatus (hereinafter, only referred to as a heating / shrinking apparatus as appropriate) 10 according to a 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 heating / shrinking device 10 includes a tunnel-like cover 12 for forming a heating / shrinking 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 is installed at an appropriate height on the floor 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 heating, and water can be saved, and there exists an advantage which can reduce resources and a running cost.

The heating / shrinking device 10 is divided into three zones in which the shrinking method 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 apparatus 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. As a result, the operator of the heating / shrinking device 10 can check the shrinkage of the shrink film S inside the window Z13 through the windows Z1 to Z3 by direct visual recognition or an image taken by a camera.

Also, a pair of handles 30 and a knob 32 are provided on the cover 12 of the heat shrinking device 10, respectively. 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 shrinkage zone Z1 of the heating and shrinking 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 installed on both sides of the conveyor 2, respectively. 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.

In addition, the shape, size, arrangement pitch, and the like of the nozzle holes 36 can be appropriately set according to the heat shrink characteristics of the shrink film S and the like. 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.

2 and 3, the

nozzle members

34a and 34b are attached to the lower end 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.

Furthermore, the upper part of the nozzle holding plate 54 is mounted on the support plate 52 so as to be slidable by bolts 55. 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, the entire shrinkage zone Z2 of the heating shrinkage device 10 will be described with reference to FIG. 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. On the side surface of each

nozzle member

34c, 34d facing the conveyor 2, a row of nozzle holes 36 is provided in, for example, 4-6 rows in the vertical direction. 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, respectively. 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 contraction zone Z3 in the heat contraction 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 transport 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.

Subsequently, with reference to FIG. 6, the mounting operation by the thermal shrinkage of the shrink film in the heating shrinkage apparatus 10 having the above-described configuration will be described. 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 Z1 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.

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 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 on which the shrink film S is mounted after passing through the three zones Z1 to Z3 of the heating and shrinking apparatus 10 is carried out of the heating and shrinking apparatus 10 by the conveyor 2 and is 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 heating and shrinking apparatus 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.

Subsequently, with reference to FIG. 8, a mounting operation by heat shrink of the shrink film in the heat shrink apparatus 10A of the present embodiment will be described.

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 while passing through partial contraction zone Z1, the 1st water vapor spouted from nozzle hole 36 of

nozzle members

34a and 34b is sprayed on the lower end part of shrink film S located in the perimeter of the lower end part of bottle container B. 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.

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.

In addition, by using the first water vapor instead of the second water vapor in the partial shrinkage zone Z1, the shrink film S can be positioned by appropriate shrinkage.

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 the state in which the shrink film is heat-shrinked and attached to the cup container C in the heating and shrinking apparatus 10B in a stepwise manner. 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.

Subsequently, with reference to FIG. 10, the mounting operation by the thermal shrinkage of the shrink film S in the heating and shrinking apparatus 10 </ b> B of this embodiment will be described.

As shown in FIG. 10 (a), 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 while passing through the partial contraction zone Z1, the second water vapor ejected from the nozzle holes 36 of the

nozzle members

34a, 34b is sprayed to the lower end portion of the shrink film S located on the outer periphery of the lower end portion of the bottle container B. 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 contraction 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

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 finely finish the mounted state of the shrink film S by making 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 above-described heating and shrinking

devices

10, 10A, and 10B, the additional shrinking zone Z3 may be omitted if the shrink film S can be sufficiently shrunk by heating in the entire shrinking zone Z2. 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 invention is not limited thereto, 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, but 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 so that the height position and angle can be individually adjusted. 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 and 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 (of nozzle holding plate) 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

A shrink shrink apparatus for shrink film, which is provided around a conveyor for conveying an article covered with a shrink film, shrinks the shrink film by heating and is mounted around the article,
A partial shrinkage zone for shrinking a portion of the shrink film, and a whole shrinkage zone for shrinking a majority of the entire shrink film;
In the partial shrinkage zone, one of a relatively low temperature first water vapor and a relatively high temperature second water vapor is sprayed onto the shrink film to partially shrink and fix the shrink film to the article.
In the overall shrinkage zone, the shrink film is attached to the article by spraying the other of the first water vapor and the second water vapor to the shrink film to cause overall shrinkage.
Heat shrink device for shrink film.
In the shrinkage | contraction apparatus of the shrink film of Claim 1,
An additional shrinkage zone is provided on the downstream side of the overall shrinkage zone in the conveying direction of the article, and further shrinkage is performed on a portion where shrinkage is insufficient with respect to the shrink film, and in the additional shrinkage zone, the first water vapor, Heat shrinkage device for shrink film, using second steam or hot air.
In the heat shrink apparatus of the shrink film of Claim 2,
The shrinkable film heat shrinking apparatus, wherein the article is a PET bottle, wherein the first water vapor is used in the partial shrinkage zone, the second water vapor is used in the whole shrinkage zone, and the first water vapor is used in the additional shrinkage zone.
In the heat shrink apparatus for shrink film according to any one of claims 1 to 3,
The total shrinkage zone has a cover for covering both sides and the upper side of the conveyor, and a window for heating the shrink film provided on the cover so that the shrinkage of the shrink film can be observed from the outside through a transparent member. Contraction device.
In the heat shrink apparatus of the shrink film of Claim 4,
At least one of a height position and a spray width of a nozzle that sprays the first water vapor, the second water vapor, or the hot air toward the shrink film in the additional contraction zone according to the observation result through the window The shrinkable film heat shrinking device is configured to be adjustable from the outside of the cover.
In the heat shrink apparatus for shrink film according to any one of claims 1 to 5,
The nozzles that spray the first water vapor or the second water vapor onto the shrink film are configured by a pair of nozzle members that are arranged side by side in the conveyance direction of the article, and the pair of nozzle members individually have a height position and a horizontal position. A shrinkable film heat shrinking device configured to be adjustable in angle with respect to a direction.