JP2003311852A - Heating device for heat-sealing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To concentrically heat only a necessary spot of a packaging material as a container, in heat-sealing the container. <P>SOLUTION: This heating device is used for heating the end structural part 13 of a square barrel-like container which has four sequentially connected first to fourth panels 21 to 24 of an almost square shape, on the inner faces of which heating regions 31 to 34 to be heated are formed. Inside the end structural part 13, a hot blast jet nozzle 71 for heating the inner face of a bottomed cylindrical container is inserted. The jet nozzle 71 has four sequentially connected side walls 81 to 84 against a first to a fourth panel 21 to 24. Each of the side walls 81 to 84 has hot blast jet parts 121 to 124 which relate to the heating regions 31 to 34 of the corresponding panels 21 to 24 and have jet holes 111 and hot blast non-jet parts 125 to 128 other than the parts 121 to 124. The hot blast non-jet parts 125 to 128 have hot blast escapes 95 to 98. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container heat-sealing heating device which is used, for example, when flatly folding and heat-sealing an end of a rectangular tubular blank which is to be the bottom or top of the container.

[0002]

2. Description of the Related Art A conventional device of this type has four substantially rectangular first to fourth bottom wall panels that are successively arranged, and a heating region to be heated is formed on the inner surface of these bottom wall panels. A heating device for heating a rectangular tubular container bottom component, which has a bottomed tubular container inner surface heating hot air jet nozzle that is fitted into the container bottom component, and the jet nozzle is
It has four side walls that are sequentially connected to correspond to the first to fourth bottom wall panels, and each side wall faces a heating region of the corresponding bottom wall panel and has a hot air jetting portion in which injection holes are formed, and It is known that other hot air non-jetting parts are formed, and the whole hot air jetting part and hot air non-jetting part of the corresponding side wall are held at a constant interval for each bottom wall panel. (For example, refer to Patent Document 1).

[0003]

[Patent Document 1] JP-A-11-240083

[0004]

In the above-mentioned conventional apparatus, the heating area to be heated on the inner surface of the bottom wall panel is heated by the hot air blown from the nozzle so that the nozzle holes of the nozzles face each other. Trying to heat up intensively.
This causes no problem if only the heated region is heated, but the non-heated region other than the heated region may also be heated. There are two possible causes for this. First, the hot air ejected from the injection holes is contacted not only with the heating region but also with the non-heating region adjacent thereto, and the non-heating region is heated. Secondly, hot air is ejected from the injection holes of the hot air ejection portion of the ejection nozzle corresponding to the heating region, but the hot air ejected heats the hot air non-ejection portion having no injection hole and is heated. This is because the non-heated region is heated by the heat radiated from the hot air non-jetting part.

If the non-heated area that does not need to be heated is heated, the packaging material may be damaged. Especially,
When the product is transported, the bottom of the container is always in contact with the content liquid, so that damage to the packaging material may cause inconvenience such as leakage of the content.

It is an object of the present invention to provide a container heat-sealing heating device capable of intensively heating only a necessary portion of a packaging material for a container when heat-sealing the end of the container. is there.

[0007]

A heating device for container heat sealing according to the present invention has four substantially quadrangular first to fourth panels which are successively arranged, and the heating area to be heated is provided on the inner surface of these panels. A heating device for heating a formed rectangular tubular container end part, which has a bottomed cylindrical container inner surface heating hot air jet nozzle fitted in the container end part, and the jet nozzle is , And has four side walls that are sequentially connected to the first to fourth panels, and at least one side wall of these side walls faces the heating region of the corresponding panel and has hot air jets formed with injection holes. Part and the hot air non-jetting part other than this part are formed, and the hot air escape is formed in at least a part of the hot air non-jetting part.

In the container heat-sealing heating device according to the present invention, since hot air escape is formed in at least a part of the hot air non-jetting portion on the inner surface side of the panel, the hot air jetted from the hot air jetting portion is hot air. Since the hot air is not quickly ejected through the escape from between the hot air non-jetting portion and the panel facing the hot air non-jetting portion, the portion other than the heating region is not unnecessarily heated. Further, even if the hot air non-jetting part is heated by the hot air jetted from the hot air jetting part, the influence of the heat radiated from the heated hot air non-jetting part reduces the hot air escape. Therefore, it is possible to intensively heat only the heating region without heating the portion other than the heating region of the panel.

Further, the hot air jetting portion and the hot air non-jetting portion are divided into upper and lower parts by the boundary line, and when the hot air escape spreads over the entire hot air non-jetting portion, only the heating region is further efficiently heated. To be done.

Further, if the boundary line has a substantially inverted V shape rising from the lower ends of both side edges of the side wall, the hot air can be efficiently discharged through the hot air non-spouting portion.

Another container heat-sealing heating device according to the present invention has four substantially quadrangular first to fourth panels which are successively connected, and a heating region to be heated is formed on the outer surface of these panels. A heating device for heating a rectangular tube-shaped container end part, which has a hot-air jet nozzle for heating the outer surface of the container fitted to the container end part, and the jet nozzles are the first to fourth panels. Correspondingly, there are four side walls that are sequentially connected, and at least one side wall of these side walls faces the heating region of the corresponding panel and has a hot air jetting portion in which jet holes are formed, and other hot air non jettings. Is formed, and hot air escape is formed in at least a part of the hot air non-jetting portion.

In another container heat-sealing heating device according to the present invention, as in the inner surface of the panel, the outer surface of the panel is heated without heating a portion other than the heating area of the panel. can do.

Further, the hot-air jetting portion and the hot-air non-jetting portion are divided into upper and lower parts by a substantially one-letter boundary line connecting the middle of both side edge lengths of the side wall, and the hot-air escape is the whole of the hot-air non-jetting portion. When it is spread over, the heating by the hot air jetted from the hot air jetting portion is further concentrated in the heating region.

Further, the heating area formed on the outer surface of at least one of the four panels is zero, and only the hot air non-spouting portion is formed on the side wall corresponding to the panel.
If the hot air escape spreads throughout the hot air non-jetting part,
The panel having a zero heating region is not heated at all, and the hot air blown from the other side wall can be promptly discharged from between the panel and the side wall through the hot air escape.

Further, if the hot air jet nozzle is suspended from the mounting plate and a hot air discharge gap is formed between at least one location in the circumferential direction of the hot air jet nozzle and the mounting plate, the hot air jet nozzle for heating the inner surface of the container and the container The hot air does not unnecessarily stay between the hot air jet nozzles for heating the outer surface, which is more effective in the concentrated heating of the heating region.

[0016] Still another container heat-sealing heating device according to the present invention has four substantially quadrangular first parts connected in sequence.
-It has a 4th top wall panel, and the 1st-4th top wall panels are divided into the 1st-4th roof panels and the 1st-4th seal panels by the 1st-4th score lines, ~ A heating device for heating a rectangular tube-shaped container top part in which a heating region to be heated is formed on the inner surface of the fourth seal panel,
The container has a bottomed tubular container for heating the inner surface of the container, which is fitted in the top portion of the container.
~ It has four side walls connected in sequence corresponding to the fourth seal panel, and at least one side wall of these side walls faces the heating region of the corresponding seal panel and forms hot air jets. Part and the hot air non-jetting part other than this part are formed, and the hot air escape is formed in at least a part of the hot air non-jetting part.

In another heating device for heat sealing of a container according to the present invention, since hot air escape is formed in at least a part of the hot air non-spouting portion on the inner surface side of the seal panel, the hot air spouting from the hot air spouting portion is formed. Is quickly discharged through the hot air escape from between the hot air non-jetting portion and the panel facing the hot air non-jetting portion, so that the portion other than the heating region is not unnecessarily heated. Further, even if the hot air non-jetting part is heated by the hot air jetted from the hot air jetting part, the influence of the heat radiated from the heated hot air non-jetting part reduces the hot air escape. Therefore, it is possible to intensively heat only the heating region without heating the portion other than the heating region of the seal panel.

Further, if the jet nozzle has a bottom wall and the hot air escape is a recess extending from the side wall of the jet nozzle to the bottom wall, bubbles generated during filling adhere to the bottom wall of the jet nozzle. Can be prevented. If bubbles adhere to the bottom wall, the nozzle may be clogged, but this is not a concern.

Further, the two hot air jetting portions are located on both sides of the one hot air non-jetting portion, and when the hot air escape spreads over the entire hot air non-jetting portion, only the heating region is further formed. Is efficiently heated.

Further, a hot air jet nozzle for heating the outer surface of the container, which is fitted on the top portion of the container, is hung from a mounting plate,
When a hot air discharge gap is formed between the hot air jet nozzle for heating the container outer surface and the mounting plate, hot air does not unnecessarily stay between the hot air jet nozzle for heating the container inner surface and the hot air jet nozzle for heating the container outer surface, It is more effective for centralized heating of the heating area.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<Heating Device for Bottom of Container> FIG. 7 (a) shows a developed view of the blank as seen from the inner surface side, and FIG. 8 (a) shows a developed view of the blank as seen from the outer surface side. There is.

In FIG. 7 (a), one horizontal score line 11 is formed on the blank, and four vertical score lines 12 are formed so as to intersect with it. Horizontal score line 11
The upper part of the above forms the bottom forming part 13, and the lower part thereof forms the body forming part 14.

The bottom portion 13 is divided by vertical score lines 12 into four substantially rectangular first to fourth bottom wall panels 21 to 24 which are sequentially connected from left to right, and a right edge of the fourth bottom wall panel 24. It comprises a strip-shaped fifth bottom wall panel 25 connected to the section. By previously sealing the entire outer surface of the fifth bottom wall panel 25 to the inner surface of the left edge of the first bottom wall panel 21, the bottom part 13 is
It is shaped like a square tube.

Second bottom wall panel 22 and fourth bottom wall panel 24
An inverted V-shaped score line 26 is formed on each of the lines. On the first bottom wall panel 21 and the third bottom wall panel 23, an inverted V-shaped virtual line 27 having the same shape as the inverted V-shaped score line 26 is formed.

In FIG. 8A, the horizontal score line 1 in FIG.
1, a horizontal score line 11, a vertical score line 12 and an inverted V-shaped score line 26 are formed in a front and back integral relationship with the vertical score line 12 and the inverted V-shaped score line 26. First bottom wall panel 21
A single-character imaginary line 28 is formed so as to extend the upper edge of the second bottom wall panel 22 to the right. One letter virtual line 28
A substantially U-shaped downward curved portion 29 is formed in the middle of its length.

On the inner surface of the bottom portion constituting portion 13, a first heating region is provided in a portion above the inverted V-shaped imaginary line 27 of the first bottom wall panel 21.
31 is the second heating region 32 in the portion of the second bottom wall panel 22 above the inverted V-shaped score line 26, and is the third portion in the portion of the third bottom wall panel 23 above the inverted V-shaped imaginary line 27. The heating region 33 is located in the fourth upper part of the fourth bottom wall panel 24 above the inverted V-shaped score line 26.
Each heating region 34 is formed. Each bottom wall panel 21
In addition to the heating regions 31 to 34 of No. 24, non-heating regions 35 to 38 are sequentially formed. The heating areas 31 to 34 are hatched.

On the outer surface of the bottom forming portion 13, a first heating region 41 is formed in a portion above the one-letter imaginary line 28 of the first bottom wall panel 21, and the second bottom wall panel 22 and the fourth bottom wall are formed. The entire panel 24 has second and third heating areas 42, 4
3 are formed respectively. 1st of the 1st bottom wall panel 21
A first non-heating region 44 is formed below the heating region 41, and a second non-heating region 45 is formed over the entire third bottom wall panel 23.

Referring to FIG. 1, the container heat-sealing heating device includes a hot air supply cylinder 51 and a hot air nozzle 53 connected to an outlet of the hot air supply cylinder 51 via a mounting plate 52.

Referring to FIG. 4, a central communication port 61 is formed at the center of the mounting plate 52, and a pair of side communication ports 62 are formed on both sides of the central communication port 61 with the central communication port 61 sandwiched therebetween.

The hot air nozzle 53 has a central communication port 61 with an upper end opening.
A bottomed rectangular tubular container inner surface heating nozzle 71 that is attached to the mounting plate 52 so as to project downward, and an annular container outer surface heating nozzle 72 that surrounds the container inner surface heating nozzle 71 at a predetermined interval. It has and.

The hot air nozzle 53 is movable in its axial direction so as to be able to move toward and away from the bottom part 13 of the rectangular tubular blank. When the hot air nozzle 53 approaches, the bottom part 13
The container inner surface heating nozzle 71 is fitted into the container, and the container outer surface heating nozzle 72 is fitted into the bottom part 13.

As shown in detail in FIG. 5, the container inner surface heating nozzle 71 has four first to fourth side walls 81 to 84 and a bottom wall 85 which are successively arranged.

FIG. 7B shows a development view of the first to fourth side walls 81 to 84 as seen from the outer surface side. Further, in this development view, the inner surface sides of the first to fourth bottom wall panels 21 to 24 are shown to be overlapped with an imaginary line.

The four side walls 81 to 84 are formed with recesses 95 at the lower portions of the first to fourth inverted V-shaped boundary lines 91 to 94 rising from both ends of the lower edge, respectively, by recessing these inwardly.
~ 98 are formed respectively. The four recesses 95-98 are
Connected at the center of the nozzle 71, resulting in a recess
The bottom of 95-98 is gone. The portions of the side walls 81 to 84 other than the recesses 95 to 98 are flat.

The bottom wall 85 is at the same level as the upper end level of the recesses 95 to 98, and has a quadrangular central wall portion 101 whose outer peripheral edge is a straight line connecting the upper ends of the recesses 95 to 98 in sequence. It is composed of four triangular corner wall portions 102 extending from the lower ends of the ridges of the adjacent side walls 81 to 84 to one side of the central wall portion 101 along the recesses 95 to 98 of the side walls 81 to 84.

The outer surfaces of the first to fourth side walls 81 to 84 are hot air nozzles.
When approaching 53, the first to fourth bottom wall panels 21 of the bottom part 13
Each of the inner surfaces of ~ 24 can be made to face each other. In this state, the inverted V-shaped boundary lines 91 to 94 are matched with the inverted V-shaped score line 26 or the inverted V-shaped imaginary line 27 of the bottom wall panels 21 to 24. Therefore, the portions of the side walls 81-84 other than the recesses 95-98 correspond to the heating regions 31-34 of the bottom wall panels 21-24, and the side walls 21-84.
The portions of the recesses 95-98 of 24 correspond to the unheated areas 35-38 of the bottom wall panels 21-24. And in the former part, a large number of injection holes 111 are opened so as to be scattered in a staggered arrangement,
As a result, the first to fourth hot air jets 121 to 124 are formed on the first to fourth side walls 81 to 84. On the other hand, in the recesses 95 to 98 of the side walls 81 to 84, there is no injection hole, and the non-hot air blowing portion 12
5 to 128, which in their entirety also form the inner hot air relief.

Referring again to FIG. 4, the container outer surface heating nozzle 72 is composed of four first to fourth nozzles which are sequentially assembled in an annular shape so as to correspond to the first to fourth bottom wall panels 21 to 24. It consists of blocks 131-134. These first to fourth nozzle blocks 131 to 134 have first to fourth side walls 141 to 144 opposed to the first to fourth bottom wall panels 21 to 24, respectively.

With reference to FIG. 6, a container outer surface heating nozzle
Describing 72 in detail, the first nozzle block 131
Is a horizontal rectangular hollow body having a thickness in the width direction and having a downward opening inward recess 151 in the lower half excluding both ends,
It has hollow portions 152 at both ends, a central hollow portion 153 that connects these upper portions, and a single plate 154 that is applied to the outer surface side of these. A circular communication hole 155 is formed in the inner wall of the hollow portion 152 at both ends.

The first side wall 141 is composed of an upper side wall 141a which extends to the upper side of the recess 151 to form a wall surface inside the central hollow portion 153, and a single plate 154 which extends to the bottom of the recess 151, and which extends from the upper side wall 141a to the first side wall 141a. The lower side wall 141b is retracted by a distance corresponding to the thickness of one nozzle block 131.

A plurality of injection holes 16 are provided in almost the upper half of the upper side wall 141a.
1 is formed. The portion forming these injection holes 161 forms the first hot air blowout portion 171. In the recess 151, there is no injection hole, and the first non-hot air blowing portion 172 is formed.
This also forms a first outer surface side hot air escape.

The second nozzle block 132 is composed of a horizontal rectangular hollow body 181 having an upper end connected to one of the lateral communication ports 62 and having a uniform width in the width direction and a uniform horizontal cross section. The hollow body 181 is
The height is higher than the height of the first nozzle block 131. Circular communication holes 182 are formed in both end surfaces of the hollow body 181.

The entire inner side wall of the hollow body 181 forms the second side wall 142. A large number of injection holes 191 are formed in almost the entire portion except the upper edge portion of the second side wall 142. The portion forming these injection holes 191 forms the second hot air blowout portion 201.

The third nozzle block 133 has upper and lower open recesses 211, and is composed of hollow portions 212 at both ends and a single plate 213 extended to the rear surface side thereof. A circular communication hole 214 is formed in the inner wall of the hollow portion 212 at both ends.

The third side wall 143 is composed of a single plate 213 forming the bottom of the recess 211. No injection hole is formed in the third side wall 143, and thus this forms the non-hot air blowing portion 221. Further, the recess 211 forms a second outer surface side hot air escape.

The fourth nozzle block 134 has a hollow body 231 having the same structure as that of the second nozzle block, although its direction is opposite. Further, the hollow body 231 has a communication hole 232.

The fourth side wall 144 is formed by the inner side wall of the hollow body 231 and has a nozzle hole 241 and a third hot air jetting part 251.

The first nozzle block 131 and the third nozzle block 133 are opposed to each other, the second nozzle block 132 and the fourth nozzle block 134 are opposed to each other, and the first nozzle block 131 and the third nozzle block 1
By sandwiching the second nozzle block 132 and the fourth nozzle block 134 between both ends of 33, respectively,
The assembly of the first to fourth nozzle blocks 131 to 134 is completed.

In this state, the first to fourth nozzle blocks 13
The bottoms of 1-134 are aligned so that they are flush with each other.
Communication hole 15 between adjacent nozzle blocks 131-134
5, 182, 214, 232 are in communication.

FIG. 8 (b) is a development view of the first to fourth side walls 141 to 144 as seen from the inner surface side, together with development views of the first to fourth bottom wall panels 21 to 24 on the outer surface side.

The first heating area 41 of the first bottom wall panel 21 is
The first hot air blowout portion 171 of the side wall 141, the second hot air blowout portion 201 of the second sidewall 142 at the second heating region 42 of the second bottom wall panel 22,
The third hot air jetting portion 251 of the fourth side wall 144 is aligned with the third heating region 43 of the fourth bottom wall panel 24. In addition, the first non-heating region 44 of the first bottom wall panel 21 has a first side wall.
The first non-hot air blowing section 172 of 141 is made to correspond,
The second unheated region 45 of the third side wall 43 has a second side of the third side wall 143.
The non-hot air jetting section 221 is associated with it.

The first and third nozzle blocks 131, 133
And there is a difference in height between the second and fourth nozzle blocks 132, 134. As shown in FIG. 3, as much as this difference in height,
A first hot air discharge gap 261 is created between the mounting plate 52 and the first nozzle block 131, and a second hot air discharge gap 262 is created between the mounting plate 52 and the third nozzle block 133.

Mainly referring to FIG. 3, a hot air supply pipe 51
Through, the hot air is supplied to the hot air nozzle 53. The container inner surface heating nozzle 71 heats the inner surface of the bottom part 13 and the container outer surface heating nozzle 72 heats the outer surface of the bottom part 13.

On the inner surface of the bottom component 13, the bottom component
The first to fourth heating regions 31 to 34 on the inner surface 13 are intensively heated by the hot air ejected from the first to fourth hot air ejecting portions 121 to 124 of the container inner surface heating nozzle 71, but the first to fourth Since hot air is not jetted from the non-hot air jetting portions 125 to 128, the first to fourth non-heating regions 35 to 38 on the inner surface of the bottom forming portion 13 are not heated. The hot air blown from the first to fourth hot air jets 121 to 124 heats a part of the first to fourth non-hot air jets 125 to 128 close to the first to fourth hot air jets 121 to 124. Although there is a possibility that the first part is in the recesses 95 to 98,
-Because it is distant from the 4th non-hot air blowout parts 125-128, the 1st-4th non-heating field 35-38 is heated by the radiant heat by the heating of the 1st-4th non-hot air blowout parts 125-128. There is no fear of Further, the hot air blown out from the first to fourth hot air blowout portions 121 to 124, after heating the heating regions 31 to 34, is released through the recesses 95 to 98 as shown by the arrow A,
There is no concern that the non-heated areas 35 to 38 will be heated by the hot air. In addition, as shown by arrow B, a part of the hot air is
It is discharged to the outside of the hot air nozzle 53 through 261 and 262.

On the outer surface of the bottom forming portion 13, first, the first
The first hot region 41 of the first bottom wall panel 21 is heated by the hot air blown out from the first hot air blowout part 171 of the side wall 141, but hot air is not blown out from the first non-hot air blowout part 172. , The first unheated region 44 is not heated. Even if the first non-hot air blowing portion 172 is heated by the same hot air, the first non-hot air blowing portion 172 is far from the first non-heating region 44, so there is no concern that the first non-heating region 44 will be heated. There is no. The hot air jetted from the first hot air jetting unit 171 is discharged to the outside of the hot air nozzle 53 through the recess 151 as shown by an arrow C without heating the unnecessary portion such as the first non-heating region 44. The hot air is also discharged from the path indicated by arrow B.

The hot air blown out from the second hot air blowout portion 201 of the second side wall 42 is almost the entire second bottom wall panel 21
The heating area 42 is heated. Since the third side wall 43 does not have a hot air jet portion, the second non-heated region 45 over substantially the entire third bottom wall panel 23 is not heated. The heating / non-heating state of the fourth bottom wall panel 24 is the same as that of the second side wall panel 22.

The hot air blown from the container outer surface heating nozzle 72 is added to the path indicated by the arrow C, and in addition to the recess 211 of the third side wall 143.
Through the path shown by the arrow D. This effectively prevents hot air from staying in the hot air nozzle 53 and heating an unnecessary portion.

Next, various modifications of the container inner surface heating nozzle 71 will be described with reference to FIGS. In the following description, the parts corresponding to those shown in FIG. 5 are designated by the same reference numerals.

The container inner surface heating nozzle 71 shown in FIG.
Similar to that shown in FIG. 4, it has four side walls 81 to 84 and a bottom wall 85.

The four side walls 81 to 84 have the same structure as that shown in FIG. The bottom wall 85 shown in FIG. 5 is a rectangular central wall portion.
Although it was constituted by 101 and four triangular-shaped corner wall portions 102, in this modification, instead of the square-shaped central wall portion 101, a cross-shaped central wall portion 271 is adopted. Two orthogonal crosses of the central wall 271 and adjacent side walls 81 to 84
A corner wall portion 272 having an L-shaped cross section extends between the lower end of the ridgeline and the lower edge of the ridgeline.

In FIG. 10, the container inner surface heating nozzle 71 is composed of four side walls 81 to 84 and a bottom wall 85.
This is the same as the example shown in FIG. 5 or 9. In addition, each side wall
The point that 81 to 84 are constituted by the hot air jetting portion and the non-hot air jetting portion is also the same as the example shown in FIG. 5 or FIG. 9. Since the four side walls have the same structure, only the fourth side wall 84 will be described below. In this modification,
The boundary between the hot air outlet 281 and the non-hot air outlet 282 is the imaginary line S.
Indicated by. In the example shown in FIG. 5 or FIG. 9, the recess 98, which is the escape of hot air, was formed in the entire non-hot air jetting portion 128, but in this modification, the recess 98 and the surface are formed in the portion close to the hot air jetting portion 281. A recess 285 having a substantially inverted V-shaped contour having an upper protruding portion 284 at the upper end thereof is formed only below the flat portion 283. Similar to the example shown in FIG. 5, the bottom wall 85 is composed of a rectangular central wall portion 286 and four triangular corner wall portions 287, but near the upper end of the corner wall portion 287, an upward projecting portion 284 is formed. Bend corresponding to
288 is formed.

FIG. 11 is intended to further narrow the recess 285 shown in FIG. That is, the boundary line S
Vertical vertical narrow central slit 291
The flat portion 292 is formed except for. Meanwhile, the bottom wall 85
A recess 293 having a rectangular contour in horizontal cross section is formed in the recess. The recess 293 communicates with the slit 291 at each corner. Therefore, the slit 291 and the recess 293 form a hot air escape.

In the above description, the recess formed in the side wall of the nozzle for heating the inner surface of the container is communicated with the center of the nozzle, and there is no bottom of the recess. However, instead of this, heating of the outer surface of the container is performed. It may be formed as a bottomed recess, such as a recess formed in the first sidewall of the nozzle. In short, it is sufficient that the recessed portion is retracted rather than the recessed portion.

<Heating Device for Top of Container> FIGS. 18 (a) and 19 (a) show an exploded view of the body portion 312 of the blank 311 and the top portion 313 connected to the upper end thereof. 18A is a view from the inner surface side of the blank 311, and FIG. 19A is a view from the outer surface side of the blank 311.

The blank 311 is formed with first to fourth blank score lines 321 to 324 for bending the blank 311 in a rectangular tube shape in sequence from right to left.
The blank 311 is divided into first to fifth panels 331 to 335 which are sequentially arranged from right to left. The blank 311 is formed into a rectangular tube shape by sealing the entire outer surface of the fifth panel 335 to the inner surface of the left edge of the first panel 331.

The first to fifth panels 331 to 335 have first to fifth top score lines 341 to 345 for partitioning the body forming portion 312 and the top forming portion 313 and for bending the top forming portion 313. Are formed so as to be sequentially crossed from right to left.

The top forming portion 313 is divided by the first to fifth top score lines 341 to 345 and is sequentially connected from the right to the left via the first to fourth blank score lines 321 to 324. It consists of wall panels 351-355. The first to fifth top wall panels 351-355 are folded in a gable roof shape with an upper edge sealing rib.

Near the upper edges of the first to fourth top wall panels 351-354, first to fourth rib score lines 361-364 for bending the upper edge sealing ribs are arranged in a transverse manner from right to left. Is formed in. By the first to fourth rib score lines 361 to 364, the first to fourth top wall panels 351 to 354 are divided into the first to fourth
Roof panels 371 to 374 and first to fourth sealing panels 38
It is divided into 1 to 384.

The first and third roof panels 371 and 373 are provided with inverted V-shaped first and second roof score lines 391 and 392 for bending so as to form the back side portion of the roof. An inclined first spout score line 401 that is bent to form a spout is formed on the second roof panel 372. On the fourth roof panel 374, a second inclined spout score line 402 is formed so that the left and right sides are opposite to the first spout score line 401. The first and third sealing panels 381, 383 have a first extension for extending upward from the upper ends of the first and second roof scorelines 391, 392 and a first and third sealing panel 381, 383 for overlapping in a folded manner. First and second superimposition score lines 411 and 412 are formed.

In FIG. 19 (a), the same score line group as the score line group described in FIG. 18 (a) is shown so as to have a front / back integral relationship with the pattern shown in FIG. 18 (a). Since the relationship can be clearly understood by referring to the reference numerals, description thereof will be omitted.

The first to fourth inner surface heating areas 421 to 424 and the first to third inner surface non-heating areas 431 shown in FIG. 18 (a).
~ 433 will be described. The heating areas 421 to 424 are hatched.

The second rib score line 362 on the inner surface of the second seal panel 382 is located substantially on the left half of the second rib score line 362, and partially on the left half thereof.
A downward U-shaped first imaginary line 441 is formed so as to surround the rectangular area together with 62. Near the both ends of the inner surface of the third seal panel 383, a second taper-shaped second imaginary line 442 is formed. On the inner surface of the fourth seal panel 384, the third imaginary line 4 is formed so that the inner surface of the second seal panel 382 is just reversed.
43 is formed.

The first inner surface heating region 421 is the entire inner surface of the first seal panel 381. In the second seal panel 382, the outside is the second inner surface heating region 422 across the first imaginary line 441.
The inside thereof is the first inner surface non-heating region 431. In the third seal panel 383, the outside of the second imaginary line 442 is the second inner surface heating region 423, and the portion sandwiched by the second imaginary line 442 is the second inner surface non-heating region 432. 4th seal panel 3
In 84, like the first seal panel 381, the third imaginary line 443
A fourth inner surface heating region 424 and a third inner surface non-heating region 433 are formed with the boundary of as the boundary.

In FIG. 19A, the first and second outer surface heating regions 451, 452 and the first and second outer surface non-heating regions 461, 4 are shown.
62 is shown.

The first and second outer surface heating regions 451 and 452 are
The entire outer surface of the first and third sealing panels 381, 383. The first and second outer surface unheated regions 461, 462 are the entire outer surface of the second and fourth seal panels 382, 384.

Next, the heating device for heat-sealing the top of the container will be described. When heating the top-constituting part 313, the top-constituting part 313 has a crease in advance, and the first and third top wall panels 351. , 353 are tilted inward so as to form a substantially V-shaped horizontal cross section (see FIGS. 13 and 1).
4).

Referring to FIG. 12, a hot air supply cylinder 551 and
A hot air nozzle 553 connected to a discharge port of this through a mounting plate 552 is shown.

Referring to FIG. 16, a central communication port 561 is formed at the center of the mounting plate 552, and a pair of side communication ports 562 are formed on both sides of the central communication port 561 with the central communication port 561 sandwiched therebetween.

The hot air nozzle 553 has a central communication port 5 with an upper end opening.
A bottomed rectangular cylindrical container inner surface heating nozzle 571 mounted to the mounting plate 552 so as to connect to the container 61 and a container outer surface heating nozzle 572 surrounding the container inner surface heating nozzle 571 at a predetermined interval. It has and.

The hot-air nozzle 553 is movable in the axial direction so that it can be moved toward and away from the top portion 313 of the rectangular tubular blank 311. When the hot air nozzle 553 approaches, the container inner surface heating nozzle 571 is fitted in the top portion 313, and the container outer surface heating nozzle 572 is fitted in the top portion 313.

As shown in detail in FIG. 17, the container inner surface heating nozzle 571 has four first to fourth side walls 581 to 5 successively connected.
It has 84 and a bottom wall 585.

FIG. 18B shows the first to fourth side walls 581 to 584.
The development view which looked at from the outer surface side is shown. Further, in this development view, the inner surfaces of the first to fourth top wall panels 351-355 are shown to be overlapped with an imaginary line.

The first and third side walls 581 and 583 are bent in a substantially V-shaped horizontal cross section so as to correspond to the creases of the first and third top wall panels 351, 353, but the second and third side walls 581 and 583 are bent. Fourth
The side walls 582, 584 are flat.

Along the lower edges of the first to fourth side walls 581 to 584, the first to fourth inner surface heating regions 421 to 424 are formed.
The 1st-3rd corresponding to the 1st-3rd inner surface non-heating area | regions 431-433 while the 4th inner surface hot-air jetting part 611-614 is formed.
Inner surface non-hot air jets 621 to 623 are formed. further,
First to fourth inner surface hot air jetting portions 61 of the first to fourth side walls 581 to 584
Above the 1 to 614, the fourth to the seventh inner surface non-hot air jetting parts 624 to 6
27 are formed.

A large number of injection holes 631 are formed in the first to fourth inner hot-air jetting sections 611 to 614 so as to be scattered in a substantially zigzag manner.

A recess 641 is formed from the third side wall 583 to the bottom wall 585 so that the recess 641 is recessed. Third
In the side wall 583, the recess 641 is provided with the second inner surface non-hot air jetting portion 62.
It also occupies the entire area of No. 2 and extends to the sixth inner surface non-heated region 626 so as to extend upward. The entire recess 641 forms an inner surface side hot air escape.

In the bottom wall 585 of the container inner surface heating nozzle 571, the recess 641 extends beyond the central portion of the bottom wall 585 and reaches the bottom near the first side wall 581.

Referring again to FIG. 16, the container outer surface heating nozzle 572 is the first to fourth side walls 58 of the container inner surface heating nozzle 571.
The first to fourth nozzle elements 651 to 654 correspond to 1 to 584.

The first to fourth nozzle elements 651 to 654 include the first to fourth nozzle elements 651 to 654.
It has fourth side walls 661-664. Container outer surface heating nozzle 57
These two first to fourth side walls 661 to 664 are attached to the first to fourth top wall panels 351 to 355 when the two are fitted to the top forming portion 313.
To each other. First and third side walls 661, 6
63 is the first and third side walls 58 of the container inner surface heating nozzle 571.
It is bent into a substantially V shape so as to correspond to 1,583.

The upper end of the first nozzle element 651 is the side communication port 5
It is in the shape of a horizontal rectangular hollow body having an upper end opening connected to one of 62 and having a thickness in the width direction. The second nozzle element 652 comprises a single plate. The third nozzle element 653 is the first nozzle element 6
The directions of 51 and the inside and outside are reversed, but they have the same structure.
The fourth nozzle element 654 is made of a single plate having the same structure as that of the second nozzle element 652, though the inner and outer directions thereof are reversed.

First nozzle element 651 and third nozzle element 6
The 53 is attached to the mounting plate 552 so that the upper end thereof contacts the mounting plate 552, but with respect to the mounting plate 552, the second nozzle element 652 and the fourth nozzle element 654 have a spacer therebetween.
It is attached with the 671 interposed.

The first to fourth nozzle elements 651 to 65 are attached to the mounting plate 552.
With the 4 attached, the first to fourth nozzle elements 651 to 654
A first hot air discharge gap 681 is formed between the adjacent ones. Furthermore, the spacer 671 allows the mounting plate 552
And a second hot air discharge gap 682 is formed between the second nozzle element 652 and the fourth nozzle element 654.

FIG. 19B is a development view of the first to fourth side walls 661 to 664 seen from the inner surface side.
55 Shown with the exterior side exploded view.

First top wall panel 351 and third top wall panel 3
First and second outer surface hot air jets 711 and 712 corresponding to the first and second outer surface heating regions 451 and 452 are formed in 53, and the second top wall panel 352 and the fourth top wall panel 354 are formed.
The first and second outer surface non-hot air blowing portions 721 and 722 corresponding to the first and second outer surface non-heating regions 461 and 462 are formed therein. Further, third and fourth outer surface non-hot air jets 723, 724 are formed above the first and second outer hot air jets 711, 712 of the first top wall panel 351 and the third top wall panel 353, respectively. There is.

A large number of injection holes 731 are formed in the first and second hot air jet parts 711 and 712.
There are no injection holes in the outer surface non-hot air blowout parts 721 and 722.

Hot air is supplied to the hot air nozzle 553 through the hot air supply pipe 551. The container inner surface heating nozzle 571 heats the inner surface of the top forming portion 313, and the container outer surface heating nozzle 572 heats the outer surface of the top forming portion 313.

On the inner surface of the top part 313, the first to fourth inner surface heating regions 421 to 424 are formed by the first to fourth inner surface hot air blowing portions 61.
Although the air is intensively heated by the hot air blown from 1 to 614, the hot air is not blown from the first to third non-hot air blowing portions 621 to 623, so that the first to fourth inner surface non-heating regions 441 to 443 are Not heated.

The hot air blown out from the third inner surface hot air blowout section 613 heats the third inner surface heating area 423, then reverses and partly enters the recess 641, so that the second inner surface non-heating area Heating of 432 is prevented.

On the outer surface of the top forming portion 313, the first and second outer surface heating areas 451 and 452 are heated by the first and second outer surface hot air blowing portions 711 and 712.

The hot air blown from the container inner surface heating nozzle 571 and the container outer surface heating nozzle 572 is heated as hot air in the container W.
It is easy to stay inside. If hot air is trapped, it may heat unnecessary places. Hot air or hot air trapped in the container W is, as shown by an arrow E in FIG.
Is quickly discharged to the outside of the container W through
There is no need to worry about hot air or hot air being trapped inside.

On the liquid level L in the container W, bubbles B generated during filling float. In particular, at the center of the liquid surface L, the bubble B is bulky and rises. Bubble B is the inner nozzle of the container 57
If it adheres to the bottom wall 585 of 1 and is carried to the injection hole 731 along the bottom wall 585 by hot air, the injection hole 731 may be blocked. However, if there is a recess 641, bubbles B are formed on the bottom wall 585.
There is no worry about sticking.

[0102]

According to the present invention, at the time of heat-sealing a container, it is possible to intensively heat only a necessary portion of the packaging material to be the container.

[Brief description of drawings]

FIG. 1 is a perspective view of a container bottom heating device according to the present invention.

2 is a cross-sectional view taken along line II-II of FIG.

FIG. 3 is a vertical sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view of the heating device.

5 is a perspective view of a container inner surface heating nozzle showing a part of FIG. 4 in an enlarged manner. FIG.

FIG. 6 is a perspective view of a container outer surface heating nozzle showing a part of FIG. 4 in an enlarged manner.

FIG. 7 is a development view of the inner surface of the container bottom part and the heating nozzle of the inner surface of the container.

FIG. 8 is a development view of a container bottom portion outer surface and a container outer surface heating nozzle.

FIG. 9 is a perspective view corresponding to FIG. 5 showing a modified example of the container inner surface heating nozzle.

FIG. 10 is a view showing another modified example of the container inner surface heating nozzle.
It is a considerable perspective view.

FIG. 11 is a perspective view corresponding to FIG. 5 showing still another modified example of the container inner surface heating nozzle.

FIG. 12 is a perspective view of a container top heating device according to the present invention.

FIG. 13 is a horizontal cross-sectional view of the heating device.

14 is a vertical sectional view taken along line XIV-XIV in FIG.

15 is a vertical sectional view taken along line XV-XV in FIG.

FIG. 16 is an exploded perspective view of the heating device.

FIG. 17 is a perspective view of the container inner surface heating nozzle showing a part of FIG. 16 in an enlarged manner.

FIG. 18 is a development view of the inner surface of the container top portion and the inner surface of the container heating nozzle.

FIG. 19 is a development view of the outer surface of the container top part and the heating nozzle of the outer surface of the container.

[Explanation of symbols]

13 Bottom component 21-24 bottom wall panel 31-34 Heating area 35 to 28 Unheated area 53 hot air nozzle 71 Container inner surface heating nozzle 72 Container outer surface heating nozzle 81-84 side wall 95-98 recess 121-124 Hot air outlet 125-128 Hot air non-jetting part 141-144 side wall 171, 201, 251 Hot air jet 172,221 Hot air non-jetting part 313 Top component 251-355 Top wall panel 421 ~ 524 Heating area 431-433 Unheated area 553 hot air nozzle 571 Container inner surface heating nozzle 572 Container outer surface heating nozzle 581-584 Side wall 641 recess 621 to 623 Hot air jet 624 to 327 Hot air non-jetting part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshihiro Nishiteru             No. 10 Nishinokawa, Taro Yasu, Taro Kitajima-cho, Itano-gun, Tokushima Prefecture             Ground 1 Shikoku Kakoki Co., Ltd. (72) Inventor Michio Ueda             No. 10 Nishinokawa, Taro Yasu, Taro Kitajima-cho, Itano-gun, Tokushima Prefecture             Ground 1 Shikoku Kakoki Co., Ltd. F term (reference) 3E075 BA03 BB22 CA01 DD12 DD17                       DD42 GA04                 3E094 AA03 CA19 DA01 DA03 HA08

Claims (11)

[Claims] 1. A rectangular tube-shaped container end part having four substantially quadrangular first to fourth panels connected in sequence, and a heating region to be heated is formed on the inner surfaces of these panels. The heating device has a bottomed cylindrical container inner surface heating hot air jet nozzle that is fitted in the container end portion, and the jet nozzle is the first
~ Four side walls are sequentially connected corresponding to the fourth panel, and at least one side wall of these side walls is opposed to the heating region of the corresponding panel and has a hot air jetting portion formed with a jet hole, and the hot air jetting portion. A heating device for container heat sealing, in which a hot air non-jetting part other than the above is formed, and hot air escape is formed in at least a part of the hot air non-jetting part. 2. The heating for container heat sealing according to claim 1, wherein the hot air jetting portion and the hot air non-jetting portion are vertically divided by a boundary line, and the hot air escape extends over the entire hot air non-jetting portion. apparatus. 3. The heating device for container heat-sealing according to claim 2, wherein the boundary line has a substantially inverted V shape rising from the lower ends of both side edges of the side wall. 4. A rectangular tube-shaped container end part having four substantially quadrangular first to fourth panels connected in sequence, and a heating region to be heated is formed on the outer surface of these panels. The heating device has a hot-air jet nozzle for heating the outer surface of the container which is fitted on the container end portion, and the jet nozzle has four side walls which are sequentially connected in correspondence with the first to fourth panels. At least one side wall of these side walls is provided with a hot air blowout portion facing the heating region of the corresponding panel and forming a jet hole, and a hot air non-jetting portion other than this, and the hot air non-jetting portion is formed. A heating device for container heat seal, in which hot air escape is formed in at least a part of. 5. The hot-air jetting portion and the hot-air non-jetting portion are divided into upper and lower parts by a substantially one-character boundary line connecting the middle portions of the side edge lengths of the side walls, and the hot-air escape is the entire hot-air non-jetting portion. The heating device for container heat sealing according to claim 4, wherein the heating device is spread over the entire area. 6. The heating area formed on the outer surface of at least one of the four panels is zero, and only the hot air non-spouting portion is formed on the side wall corresponding to the panel, and the hot air escape is the same. The method of claim 4, wherein the non-spouting portion is spread over the entire area.
The heating device for heat-sealing a container according to [4]. 7. The hot air jet nozzle is suspended from a mounting plate, and a hot air discharge gap is formed between at least one position in the circumferential direction of the hot air jet nozzle and the mounting plate. A heating device for heat sealing the container described. 8. It has four substantially quadrangular first to fourth top wall panels that are successively arranged, and the first to fourth top wall panels are the first to fourth top wall panels.
A rectangular tubular container top part which is divided into first to fourth roof panels and first to fourth seal panels by a fourth score line, and a heating region to be heated is formed on the inner surfaces of the first to fourth seal panels. A heating device for heating a component, comprising a hot air jet nozzle for heating the inner surface of a cylindrical container having a bottom, which is fitted in the container top component, and the jet nozzle corresponds to the first to fourth seal panels. Has four side walls in succession, and at least one of these side walls is
A hot air jetting portion that is opposite to the heating area of the corresponding seal panel and has a jet hole and a hot air non-jetting portion other than this are formed, and hot air escape is formed in at least a part of the hot air non-jetting portion. Heating device for container heat sealing. 9. The heating device for container heat-sealing according to claim 8, wherein the jet nozzle has a bottom wall, and the hot air escape is a recess extending from the side wall of the jet nozzle to the bottom wall. 10. The two hot air jetting portions are located on both sides of one hot air non-jetting portion, and the hot air escape is
The heating device for container heat sealing according to claim 8 or 9, wherein the heating device is spread over the entire hot air non-jetting part. 11. A hot air jet nozzle for heating the outer surface of the container, which is fitted to the top portion of the container, the hot air jet nozzle for heating the outer surface of the container is hung from a mounting plate, and the hot air jet nozzle for heating the outer surface of the container and The heating device for container heat sealing according to any one of claims 8 to 10, wherein a hot air discharge gap is formed between the mounting plates.