JP2024014553A - heat shrink equipment - Google Patents

Abstract

The present invention provides a heat shrinking device that prevents water droplets from adhering to articles. [Solution] A heat shrinking device (1) is disposed below a steam jet hole (41) that jets steam (S) to a cap seal (L1) and below the steam jet hole (41), and is installed in a container (B). It is provided with a hot air blowing hole (51) that blows hot air (HA) to a portion where the cap seal (L1) is not fitted. [Selection diagram] Figure 1

Description

The present invention relates to a heat shrinking device that heat shrinks a shrink film fitted onto an article.

Conventionally, it has been known to attach a cap seal made of a heat-shrinkable shrink film to the mouth of a container for sealing purposes. In connection with this type of technology, Patent Document 1 discloses that when a cap seal is heated and contracted by steam, cooling water is jetted into the body of the container to suppress a rise in the temperature of the contents. There is.

Japanese Patent Application Publication No. 2003-40219

However, in the prior art as described above, since water droplets adhere to the body of the container, there is a possibility that the tack seal, heat-sensitive label, etc. attached to the container may be easily peeled off after the cap seal is heat-shrinked.

One aspect of the present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a heat shrinking device that prevents water droplets from adhering to articles.

In order to solve the above problems, a heat shrinking device according to one aspect of the present invention is a heat shrinking device that heat shrinks a shrink film fitted onto a part of an article to be transported in a transport direction, and includes: A steam ejection hole that ejects steam to the shrink film and the steam ejection hole are arranged at positions spaced apart in the vertical direction, and a gas ejection hole that ejects gas to a portion of the article that is not covered with the shrink film. and.

In order to solve the above problems, a heat shrinking device according to one aspect of the present invention is a heat shrinking device that heat shrinks a shrink film fitted onto a part of an article to be transported in a transport direction, and includes: It includes a steam ejection hole that ejects steam to the shrink film, and a gas ejection hole that ejects gas to a part of the article where the shrink film is not fitted to reduce adhesion of the steam to the part. .

According to one aspect of the present invention, it is possible to provide a heat shrinkage device that prevents water droplets from adhering to an article.

1 is a front view showing a heat shrinkage device according to Embodiment 1. FIG. 2 is a schematic diagram showing an inner wall of the heating tunnel shown in FIG. 1. FIG. FIG. 2 is an enlarged view of a portion surrounded by a dashed-dotted line shown in FIG. 1; FIG. 3 is a front view showing a heat shrinkage device according to a second embodiment.

[Embodiment 1]
An embodiment of the present invention will be described below based on FIGS. 1 to 3. In this embodiment, an example of attaching a cap seal to the mouth of a container using a heat shrinkage device according to one aspect of the present invention will be described. However, the following description is an illustration of the heat shrinkage device according to the present invention, and the technical scope of the present invention is not limited to the illustrated example.

(Overview of heat shrinkage device 1)
FIG. 1 is a front view schematically showing a heat shrinkage device 1 according to the present embodiment. The heat shrinking device 1 is a device that attaches a cap seal (shrink film) L1 to the mouth of a container (article) B. The containers B fitted with the unshrinked cap seals L1 are transported by a conveyor (transport section) T and sequentially transported to the heat shrinking device 1. The heat-shrinking device 1 spouts steam S to the cap seal L1 while the container B passes through the heat-shrinking device 1, and heat-shrinks the cap seal L1 to bring it into close contact with the container B.

When the heat shrinking device 1 according to the present embodiment blows out steam S to the cap seal L1 fitted to the mouth of the container B, the heated air shrinkage device 1 blows hot air ( By spouting HA (gas), the adhesion (amount) of vapor S to the body of the container B is reduced. This makes it difficult for water droplets to adhere to the body of the container B after the cap seal L1 has been heat-shrinked, that is, the body of the container B carried out from the heat-shrinking device 1, and the tack seal to be attached to the body in the next step. , peeling of heat-sensitive labels, etc. can be prevented.

Note that the cap seal L1 is made of a heat-shrinkable polyester film or a polystyrene film on which characters, designs, etc. are printed, and is formed into a cylindrical shape. The container B to which the cap seal L1 is attached is, for example, a bottle container, a can container, a polyester PET bottle formed by blow molding, or the like. However, the object to which the shrink film, such as the cap seal L1, is attached is not limited to containers, and may be any article that can be used with the shrink film wrapped around it. In this embodiment, the container B has a shape in which a small-diameter mouth portion and a large-diameter body portion are connected by a shoulder portion whose diameter increases from the mouth portion toward the body portion. The inside of the container B is filled with a content such as a liquid, and its mouth is closed with a fitting cap C made of polyethylene or the like.

(Configuration of heat shrinkage device 1)
Next, the configuration of the heat shrinking device 1 will be explained with reference to FIGS. 1 to 3. FIG. 2 is a schematic diagram showing the inner wall of the heating tunnel 2 shown in FIG. In the following description, the direction in which the container B is conveyed by the conveyor T is referred to as the conveyance direction X, the direction orthogonal to the conveyance direction X in plan view is referred to as the left-right direction Y, and the direction orthogonal to the conveyor direction This is sometimes referred to as the vertical direction (vertical direction) Z.

As shown in FIGS. 1 and 2, the heat shrinkage device 1 includes a heating tunnel 2 and an exhaust duct 3 that is connected to the heating tunnel 2 and forcibly exhausts steam S and the like within the heating tunnel 2. The heat shrinkage device 1 also includes a steam supply section (not shown) that supplies steam S to the heating tunnel 2, and an air supply section (not shown) that supplies pressurized air (air) A to the heating tunnel 2. .

(Heating tunnel 2)
The heating tunnel 2 is a heating furnace that heats and shrinks the cap seal L1. The heating tunnel 2 is provided, for example, so as to cover a linear conveyor T such as a belt conveyor or a roller conveyor. The heating tunnel 2 includes a pair of steam jetting units 4 arranged on both sides of the container B being transported, and a pair of hot air jetting units 5 arranged below the pair of steam jetting units 4. include.

The heating tunnel 2 is provided with a steam jet hole 41 that jets steam S to the cap seal L1, and is disposed below the steam jet hole 41 (on the lower side in the vertical direction), so that the cap seal L1 of the container B is fitted. The hot air blowing hole (gas blowing hole) 51 is provided to blow hot air HA to the body part that is not exposed. Further, the heating tunnel 2 is disposed inside thereof above the hot air blowing hole 51 and between the steam blowing hole 41 and the hot air blowing hole 51, and the hot air HA ejected from the hot air blowing hole 51 is disposed inside the heating tunnel 2. It includes a wind direction adjusting plate (adjusting plate) 6 that adjusts the direction of the hot air HA, that is, the direction of the hot air HA, and a closing plate 7 disposed below the hot air blowing hole 51. The hot air blowing hole 51 is sandwiched between the wind direction adjusting plate 6 and the closing plate 7 in the vertical direction Z, and blows out the hot air HA from the gap sandwiched between the wind direction adjusting plate 6 and the closing plate 7.

The steam jet holes 41 are arranged along the transport direction X on two inner walls of the steam jet unit 4 that face each other with the container B in between, so as to be located on both sides of the container B being transported. The steam jet hole 41 is arranged at the height of the cap seal L1, that is, at the height of the mouth of the container B. The position of the steam jet hole 41 in the vertical direction Z may be adjustable depending on the position of the cap seal L1. Further, the amount of steam S jetted out from the steam jet hole 41 may be adjusted by a supply steam amount adjustment valve (not shown).

In this embodiment, the steam ejection holes 41 are circular through holes bored in the inner wall of the steam ejection unit 4, and the plurality of steam ejection holes 41 are arranged in two stages, upper and lower. Specifically, on the upstream (carry-in) side of the heating tunnel 2, there is only one stage of steam ejection holes 41 on the lower stage, and the lower side of the cap seal L1 fitted on the container B carried in is This is a positioning zone where the cap seal L1 is positioned with respect to the container B by heating. Further, on the downstream side of the positioning zone, the number of stages of the steam jet holes 41 is two, upper and lower, and a main heating zone where the entire positioned cap seal L1 is heated to attach the cap seal L1 to the container B. This is the finishing zone.

Note that the number (number of stages), position, shape, etc. of the steam ejection holes 41 can be changed as appropriate depending on the dimensions of the container B and the cap seal L1. For example, the number of stages of the steam jet holes 41 is preferably around 10, and by blocking a part of the steam jet holes 41 according to the dimensions of the container B, etc., the jet position of the steam S in the vertical direction X can be changed. Good too. Further, the shape of the steam ejection hole 41 is preferably circular, but may be shaped like a vertical slit. Furthermore, the interval in the left-right direction Y between the steam jetting units 4 facing each other can also be changed as appropriate depending on the dimensions of the container B and the cap seal L1.

A steam supply section (not shown) is connected to the steam jet unit 4 via a steam supply port 42 (see FIG. 2) that communicates with the steam jet hole 41 . The steam ejection unit 4 heats and shrinks the cap seal L1 by ejecting the steam S supplied from the steam supply section from the steam ejection hole 41. The steam ejection hole 41 may eject superheated steam as the steam S. Superheated steam is steam obtained by heating saturated steam that has evaporated at 100° C. to a higher temperature. By using superheated steam as the steam S, the heating efficiency of the cap seal L1 can be increased.

The hot air outlet 51 is arranged below the steam outlet 41 . Specifically, the hot air jet holes 51 are arranged along the transport direction X on two opposing inner walls of the hot air jet unit 5 so as to be located on both sides of the container B being transported. The hot air blowing hole 51 blows hot air HA below the cap seal L1, that is, to the body of the container B where the cap seal L1 is not fitted, thereby preventing the vapor S from adhering to the body of the container B. reduce

In this embodiment, two hot air blowing units 5 are arranged along the conveyance direction H. The hot air blowing holes 51 are rectangular through holes having a longitudinal direction in the transport direction X, which are bored in the inner wall of each hot air blowing unit 5 . A wind direction adjusting plate 6 is provided above the hot air blowing hole 51 to define the upper end of the hot air blowing hole 51 and to adjust the wind direction of the hot air HA. Furthermore, a closing plate 7 that defines the lower end of the hot air jetting hole 51 is provided below the hot air jetting hole 51 . The width of the hot air blowing hole 51 in the vertical direction X can be changed by adjusting the distance between the wind direction adjusting plate 6 and the closing plate 7.

In the inner wall of the heating tunnel 2, if the region where the steam jet holes 41 are arranged is the steam jet region R1, and the region where the hot air jet holes 51 are arranged is the hot air jet region (gas jet region) R2, The length of the warm air ejection region R2 in the transport direction X may be equal to or longer than the length of the steam ejection region R1 in the transport direction X. The length of the steam ejection area R1 in the conveyance direction (the downstream end). In addition, the length of the hot air jetting region R2 in the conveying direction This is the distance from the outer end (downstream end) of the hole 51. As a result, the hot air spouting region R2 can be arranged so as to overlap the entire steam spouting region R1 in a plan view, and the hot air HA can be spouted over the entire steam spouting region R1 to prevent the steam S from adhering to the container B. can be reduced.

Further, the warm air ejection region R2 may overlap the entire steam ejection region R1 in a plan view, and may be longer on the upstream side in the conveyance direction X than the steam ejection region R1. Thereby, the container B can be preheated by the warm air B before the steam S is ejected. Therefore, adhesion of the vapor S to the container B can be effectively reduced.

An air supply section (not shown) is connected to the hot air blowing unit 5 via an air supply port 52 (see FIG. 1) that communicates with the hot air blowing hole 51 . Pressurized air A at room temperature is supplied to the heating tunnel 2 from an air supply section. Inside the hot air blowing unit 5, an air heating pipe (gas heating pipe) 53 through which the steam S supplied from the above-mentioned steam supply section passes is arranged so as to be folded back a plurality of times. Therefore, the pressurized air A supplied from the air supply port 52 into the hot air blowing unit 5 is heated by contacting the circumferential surface of the air heating pipe 53, and the hot air HA is heated from the hot air blowing hole 51. It is ejected as. In this way, by using superheated steam to generate the hot air HA, the energy consumption of the heat shrinking device 1 can be reduced. The steam S that has passed through the air heating pipe 53 may be supplied to the steam jetting unit 4 through the steam supply port 42, either directly or after being reheated. Thereby, the steam S used for heating the pressurized air A can be reused for heating and shrinking the cap seal L1, and the amount of steam S used can be reduced. Moreover, if the configuration uses superheated steam as the steam S, the heating efficiency of the pressurized air A can be increased.

Note that the heated pressurized air A may be directly supplied to the hot air blowing unit 5 and ejected from the hot air blowing holes 51 as the hot air HA. In this case, since there is no need to heat the pressurized air A inside the hot air blowing unit 5, the heating mechanism such as the air heating pipe 53 may be omitted from the hot air blowing unit 5.

Note that the position and shape of the hot air blowout hole 51 can be changed as appropriate depending on the dimensions of the container B and the like. Further, the interval in the left-right direction Y between the hot air blowing units 5 facing each other can be changed as appropriate depending on the dimensions of the container B and the like.

In the heating tunnel 2, the hot air HA ejected from the hot air outlet 32 to the body of the container B is reflected by the surface of the container B, and a portion of it hits the cap seal L1. If the speed or volume of the hot air HA hitting the cap seal L1 is high, the quality of the cap seal L1 may deteriorate (for example, wrinkles or uneven shrinkage may occur). For this reason, it is preferable to adjust the hot air HA that hits the cap seal L1 to an appropriate range so as to reduce the adhesion of the steam S to the body of the container B and prevent quality deterioration of the cap seal L1. Therefore, in the heating tunnel 2, by arranging the wind direction adjusting plate 6 above the hot air jetting hole 51 to adjust the direction of the hot air HA jetted from the hot air jetting hole 51, the hot air HA hitting the cap seal L1 can be adjusted. is easy to adjust.

FIG. 3 is an enlarged view showing a portion P surrounded by a dotted line frame shown in FIG. As shown in FIG. 3, the wind direction adjusting plate 6 is arranged on the opposite side to the cap seal L1, that is, at an angle inclined downward. Specifically, the wind direction adjusting plate 6 includes a first portion 61 extending along the vertical direction Z, and a second portion 62 extending from the lower end of the first portion 61 toward the container B side. The second portion 62 forms an angle θ with the first portion 61 . This angle θ is adjusted to, for example, 90 degrees or more. A part of the hot air HA ejected from the hot air ejection holes 51 in the left-right direction Y collides with the air direction adjusting plate 6, and the air direction is changed diagonally downward. Therefore, by changing the angle θ of the wind direction adjusting plate 6, etc., the flow of the warm air HA in the heating tunnel 2 can be adjusted. Therefore, it becomes easy to adjust the hot air HA that is reflected on the surface of the container B and hits the cap seal L1 to an appropriate range, and it is possible to reduce the deterioration in the quality of the cap seal L1 caused by the hot air HA.

Note that the hot air HA hitting the cap seal L1 changes depending on various factors such as the shape of the container B, the position of the hot air outlet 51, the temperature of the hot air HA ejected from the hot air outlet 51, the wind speed, or the air volume. . Therefore, if the hot air HA hitting the cap seal L1 can be adjusted to an appropriate range by adjusting these various factors, the air direction adjusting plate 6 is not essential and may be omitted. However, by using the wind direction adjusting plate 6, the hot air HA hitting the cap seal L1 can be easily adjusted.

(Exhaust duct 3)
The exhaust duct 3 is connected to an exhaust port 81 (see FIG. 1) provided in the upper wall 8 of the heating tunnel 2. The exhaust duct 3 includes a fan (not shown), sucks the steam S, etc. inside the heating tunnel 2 from above, and forcibly discharges it to the outside. Note that the discharged steam S, etc. refers to water vapor and steam formed by condensation of water vapor.

(Operation of heat shrinkage device 1)
Next, a case where the cap seal L1 is attached to the container B using the heat shrinking device 1 will be described. First, the cap seal L1 is fitted onto the mouth of the container B on the conveyor T, and the container B is carried into the heating tunnel 2. The heating tunnel 2 blows out hot air HA from the hot air blowing holes 51 to the container B that has been carried in. Thereby, the container B can be heated in advance and adhesion of the steam S to the container B can be effectively reduced.

Next, the heating tunnel 2 jets the steam S from the steam jet hole 41 on the lower stage side toward the lower side of the cap seal L1 in the positioning zone. As a result, mainly the lower side of the cap seal L1 comes into close contact with the container B, and the cap seal L1 is positioned at the mouth of the container B. At this time, since the warm air HA is continuously ejected from the hot air blow-off holes 51 to the body of the container B, adhesion of the steam S to the body of the container B is reduced.

Next, the heating tunnel 2 jets steam S from the upper and lower steam jet holes 41 to the entire cap seal L1 in the main heating zone and the finishing zone. As a result, the cap seal L1 is completely heat-shrinked and tightly adheres to the peripheral surface and peripheral edge of the container B and the fitting cap C. At this time, since the warm air HA is continuously ejected from the hot air blowing holes 51 to the body of the container B, adhesion of the steam S to the body of the container B is reduced.

In this way, the heating tunnel 2 continuously blows out the hot air HA to the body of the container B while blowing out the steam S to the cap seal L1. For this reason, water droplets are less likely to adhere to the container B after the cap seal L1 has been heat-shrinked, that is, to the body of the container B that has been carried out from the heat-shrink apparatus 1. Therefore, for example, peeling of the tack seal, heat-sensitive label, etc. attached to the body of the container B in the next step can be prevented.

(Summary of heat shrinkage device 1)
As described above, the heat shrinkage device 1 according to the present embodiment is a heat shrinkage device 1 that heats and shrinks the cap seal L1 fitted onto a part (mouth) of the container B being transported in the transport direction X. A steam ejection hole 41 is arranged along the conveyance direction It is provided with a hot air blowing hole 51 that blows hot air HA to a portion (body) that is not fitted.

Since the heat shrinking device 1 includes a warm air blowing hole 51 that blows hot air HA to a portion of the container B where the cap seal L1 is not fitted, it is possible to reduce the adhesion of steam S to the portion. becomes. Therefore, according to the present embodiment, it is possible to realize the heat shrinking device 1 in which water droplets are unlikely to adhere to the container B.

[Embodiment 2]
Another embodiment of the present invention will be described based on FIG. 4. For convenience of explanation, members having the same functions as the members described in the above embodiment are given the same reference numerals, and the description thereof will not be repeated.

In this embodiment, an example of attaching a label to the body of a container using a heat shrinkage device according to one aspect of the present invention will be described. However, the following description is an illustration of the heat shrinkage device according to the present invention, and the technical scope of the present invention is not limited to the illustrated example.

(Configuration of heat shrinkage device 11)
FIG. 1 is a front view schematically showing a heat shrinkage device 11 according to this embodiment. The heat shrink device 11 is a device that attaches the label (shrink film) L2 to the body of the container B. As shown in FIG. 1, the heat shrinkage device 11 mainly differs from the heat shrinkage device 1 described above in that the hot air blowout unit 5 is disposed above the steam blowout unit 4.

In the heat shrinkage device 11, the steam nozzle 41 is arranged at the level of the label L2, that is, at the height of the body of the container B, and the hot air nozzle 51 is arranged above the steam nozzle 41. be done. Further, a wind direction adjusting plate 60 is disposed below the hot air blowing hole 51 and between the steam blowing hole 41 and the hot air blowing hole 51 .

The wind direction adjusting plate 60 is arranged on the opposite side to the label L2, that is, at an upwardly inclined angle. A portion of the hot air HA ejected from the hot air ejection holes 51 in the left-right direction Y collides with the air direction adjusting plate 60, and the air direction is changed diagonally upward. Therefore, by changing the angle θ of the wind direction adjustment plate 60, for example, it becomes easier to adjust the hot air HA that is reflected on the surface of the container B and hits the label L2, and the quality of the label L2 caused by the hot air HA can be reduced. The drop can be reduced.

(Operation of heat shrinkage device 11)
Next, a case will be described in which the label L2 is attached to the container B using the heat shrinking device 11. First, the label L2 is fitted onto the body of the container B on the conveyor T, and the container B is carried into the heating tunnel 2. The heating tunnel 2 blows out hot air HA from the hot air blowing holes 51 to the container B that has been carried in. Thereby, the container B can be heated in advance and the adhesion of the steam S to the container B can be effectively reduced.

Next, the heating tunnel 2 jets steam S from the steam jet hole 41 on the lower stage side toward the lower side of the label L2 fitted on the body of the container B in the positioning zone. As a result, mainly the lower side of the label L2 comes into substantially close contact with the container B, and the label L2 is positioned on the container B. At this time, since the heating tunnel 2 continuously blows out the hot air HA from the hot air blowing holes 51 to the mouth of the container B, adhesion of the steam S to the mouth of the container B is reduced.

Next, the heating tunnel 2 jets steam S from the upper and lower steam jet holes 41 over the entire label L2 in the main heating zone and the finishing zone. As a result, the label L2 is completely heat-shrinked and tightly adheres to the circumferential surface of the container B. At this time, since the heating tunnel 2 continuously blows out the hot air HA from the hot air blowing holes 51 to the mouth of the container B, adhesion of the steam S to the mouth of the container B is reduced.

In this way, the heating tunnel 2 continuously jets the warm air HA to the mouth of the container B while spouting the steam S onto the label L2. For this reason, water droplets are less likely to adhere to the opening of the container B after the label L2 has been heat-shrinked, that is, the container B that has been carried out from the heat-shrinking device 11. Therefore, for example, peeling of the tack seal, heat-sensitive label, etc. attached to the mouth of the container B in the next step can be prevented.

(Summary of heat shrinkage device 11)
As described above, the heat shrinkage device 11 according to the present embodiment is a heat shrinkage device 11 that heats and shrinks the label L2 fitted onto a part (body) of the container B transported in the transport direction X. , a steam jet hole 41 arranged along the transport direction X and spouting steam S to the label L2; and a steam jet hole 41 arranged above the steam jet hole 41 along the transport direction X, into which the label L2 of the container B is fitted. The hot air blowing hole 51 blows hot air HA to a portion (mouth portion) that is not exposed to air.

The heat shrinking device 11 is equipped with a warm air blowing hole 51 that blows hot air HA to a portion (mouth portion) of the container B where the label L2 is not fitted, thereby reducing adhesion of steam S to the portion. becomes possible. Therefore, according to the present embodiment, it is possible to realize the heat shrinking device 11 in which water droplets do not easily adhere to the container B.

〔supplement〕
A heat shrinkage device according to aspect 1 of the present invention is a heat shrinkage device that heats and shrinks a shrink film fitted over a part of an article being transported in a transport direction, and includes a steam jet that jets steam onto the shrink film. The hole and the steam ejection hole are arranged at positions spaced apart in the vertical direction, and includes a gas ejection hole that ejects gas to a portion of the article that is not covered with the shrink film.

In the above configuration, the heat shrinking device includes a gas ejection hole that ejects gas to a portion of the container where the shrink film is not fitted, so that it is possible to reduce adhesion of steam to the portion. Therefore, according to the above configuration, it is possible to realize a heat shrinkage device in which water droplets are unlikely to adhere to the container.

In the heat shrinkage device according to aspect 2 of the present invention, in aspect 1, the heat shrinkage device is arranged between the steam jet hole and the gas jet hole at an angle inclined to the opposite side with respect to the shrink film, and the gas jet hole It may further include an adjustment plate that adjusts the direction of the gas ejected from the air.

According to the configuration, the direction of the gas can be easily adjusted by changing the angle of the adjustment plate.

In the heat shrinkage device according to aspect 3 of the present invention, in aspect 1 or 2, the length in the conveyance direction of the gas jetting region, which is the region where the gas jetting holes are arranged, is such that the length in the conveying direction is the region where the steam jetting holes are arranged. It may be equal to or longer than the length of the steam ejection region in the transport direction.

In the above configuration, the gas ejection region can be arranged so as to overlap the entire steam ejection region in plan view. Therefore, according to the above configuration, gas can be ejected over the entire steam ejection region, and adhesion of vapor to the container can be reduced.

In the heat shrinking apparatus according to aspect 4 of the present invention, in aspect 3, the gas jetting region may be longer on the upstream side in the conveying direction than the steam jetting region.

With the above configuration, the container can be preheated by the gas before the steam is ejected. Therefore, according to the configuration, adhesion of steam to the container can be effectively reduced.

In the heat shrinkage device according to Aspect 5 of the present invention, in Aspects 1 to 4, after the gas is brought into contact with the circumferential surface of the gas heating pipe through which the steam passes and is heated, the gas is ejected from the gas ejection hole. You may.

According to the configuration, by ejecting the heated gas from the gas ejection hole, adhesion of vapor to the article can be more effectively reduced. Further, according to the configuration, by using steam to heat the gas, the energy consumption of the heat shrinking device can be reduced.

A heat shrinkage device according to aspect 6 of the present invention is a heat shrinkage device that heats and shrinks a shrink film fitted over a part of an article being transported in a transport direction, and includes a steam jet that jets steam to the shrink film. and a gas ejection hole that ejects gas to a portion of the article where the shrink film is not fitted to reduce adhesion of the vapor to the portion.

In the above configuration, the heat shrinking device includes a gas ejection hole that ejects gas to a portion of the container where the shrink film is not fitted to reduce adhesion of steam to the portion. Therefore, according to the above configuration, it is possible to realize a heat shrinkage device in which water droplets are unlikely to adhere to the container.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. are also included within the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1, 11: Heat shrinkage device 6, 60: Wind direction adjustment plate (adjustment plate)
41: Steam vent 52: Warm air vent (gas vent)
A: Pressurized air (air)
B: Container (article)
HA: Warm air (gas)
L1: Cap seal (shrink film)
L2: Label (shrink film)
R1: Steam ejection region R2: Warm air ejection region (gas ejection region)
X: Conveyance direction Z: Vertical direction (vertical direction)
S: Steam θ: Angle

Claims (6)

A heat shrinking device that heats and shrinks a shrink film fitted onto a part of an article being transported in a transport direction,
a steam ejection hole that ejects steam to the shrink film;
a gas ejection hole that is arranged at a position spaced apart from the steam ejection hole in the vertical direction and that ejects gas to a portion of the article that is not covered with the shrink film;
A heat shrinkage device equipped with. Claim further comprising: an adjustment plate disposed between the steam nozzle and the gas nozzle at an angle tilted to the opposite side with respect to the shrink film, and adjusting the direction of the gas ejected from the gas nozzle. Item 1. The heat shrinkage device according to item 1. 1 . The length of the gas ejection region in the transport direction, which is the region where the gas ejection holes are arranged, is greater than or equal to the length in the transport direction of the steam ejection region, which is the region where the steam ejection holes are arranged. Or the heat shrinkage device according to 2. The heat shrinkage device according to claim 3, wherein the gas ejection region is longer than the steam ejection region on the upstream side in the conveyance direction. 3. The heat shrinking apparatus according to claim 1, wherein the gas is heated by contacting the circumferential surface of a gas heating pipe through which the steam passes, and then the gas is ejected from the gas ejection hole. A heat shrinking device that heats and shrinks a shrink film fitted over a part of an article being transported in a transport direction,
a steam ejection hole that ejects steam to the shrink film;
a gas ejection hole that ejects gas to a portion of the article where the shrink film is not fitted to reduce adhesion of the vapor to the portion;
A heat shrinkage device equipped with.

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