JP6145840B2 - Method for manufacturing overlap package and overlap package - Google Patents

Description

  In this invention, the entire container group in which a plurality of containers are gathered in an upright state so that the body part is in contact with each other is completely wrapped with a wrapping material made of a heat-shrinkable film in which air vent holes are formed, and is overlapped with heat. The present invention relates to a method for manufacturing a package and an overlap package.

  For example, as shown in FIG. 10 (a), when selling three bottled products Ba filled with a liquid beverage in a glass bottle, as shown in FIG. 10 (b), the product (glass bottle) Ba in a container is used. It is made of a heat-shrinkable film in which air vent holes 61 are formed so that there is no exposed portion of the product group Ga in which the three product containers Ba in a standing state are gathered in a horizontal row so that the body portion ba of the product comes into contact. It is generally performed to sell as an overlap package 50a that is completely wrapped by the packaging material 60 and heat-shrinked.

JP 2003-146362 A

  By the way, as described above, when overlapping packaging is applied to the product group Ga in which the three product containers Ba in a standing state are gathered in a horizontal row so that the body portion ba contacts, The vertical length La of the contact portion of the trunk (lower) ba of the product (glass bottle) Ba in contact with the container has a certain length with respect to the height Ha of the product (glass bottle) Ba in the container. If the product group Ga is wrapped with the packaging material 60 in which the air vent holes 61 are evenly formed, and the packaging material 60 is heated and contracted as a whole, all the products Ba in the container stand upright. In this state, it is surely bound and the overlap package 50a can be finished neatly. 10 (a) and 10 (b), the shaded display portions of the product (glass bottle) Ba in the container are in the state of the product group Ga in which the product (glass bottle) Ba in the container is gathered in a horizontal row in a standing state. The area | region between the uppermost contact position of the trunk | drum ba which contacts this to the lowest contact position is shown.

  However, like the container-filled product Bb shown in FIG. 11A, the length Lb in the vertical direction of the contact portion of the trunk bb is less than 50% of the total height Hb of the container-filled product (glass bottle) Bb. When the packaging material 60 enclosing the product group Gb is heat-shrinked, the binding force of the packaging material 60 at the lower part of the product (glass bottle) Bb in which the body bb is in contact with each other, The product in the container (glass bottle) Bb that is not in contact with the container is defeated by the binding force of the packaging material 60 on the upper part, and as shown in FIG. Glass bottle) Since the overlap packaging is performed with Bb tilted, there is a problem that the overlap package 50b cannot be finished neatly. 11 (a) and 11 (b), the shaded display portions of the product (glass bottle) Bb in the container are mutually in the state of the product group Gb in which the product (glass bottle) Bb in the container is assembled in a horizontal row in a standing state. The area | region between the uppermost contact position of the trunk | drum bb which contacts this to the lowest contact position is shown.

  Therefore, the problem of the present invention is that when a plurality of containers are assembled in an upright state, when the vertical length of the contact portion of the container body is less than 50% of the total height of the container, An object of the present invention is to provide an overlap package manufacturing method and an overlap package that can be clearly wrapped without tilting.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a package comprising a heat-shrinkable film having an air vent hole formed in an entire container group in which a plurality of containers are assembled in an upright state so that the body part comes into contact. A method of manufacturing an overlapped packaging body that is completely encased in a material and heat-shrinked, wherein the container is in the state of the container group from the uppermost contact position to the lowermost contact position. The length of the container is 20% to 50% of the height of the container, and between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body parts that are in contact with each other in the state of the container group. A covering step of completely wrapping the entire container group with the wrapping material so that an air vent hole is disposed only in a region corresponding to From the vicinity of the upper contact position to the lowest contact A pre-shrinking step in which the corresponding region is thermally shrunk to the vicinity of the placement, and from the vicinity of the uppermost contact position of the body portion in contact with each other in the state of the container group in the packaging material to the vicinity of the lowermost contact position It is providing the manufacturing method of the overlapping package body characterized by including the post-shrinking process which heat-shrinks area | regions other than between.

  In the invention according to claim 2, the entire container group in which a plurality of containers are gathered in an upright state so that the body part comes into contact is completely wrapped by a packaging material made of a heat-shrinkable film having an air vent hole, and is heated and shrunk. In the manufacturing method of the overlapped package, the container has a container height of 20 between the uppermost contact position and the lowermost contact position of the body portions that are in contact with each other in the state of the container group. % To 50%, and arranged in a corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions that are in contact with each other in the state of the container group. A covering step of completely wrapping the entire container group with the packaging material such that the sum of the opening areas of all the air vent holes is larger than the sum of the opening areas of all the air vent holes arranged in the other areas; The container in the packaging material In the state of the container group in the wrapping material, the pre-shrinking step of thermally contracting the corresponding region between the vicinity of the uppermost contact position of the body part and the vicinity of the lowermost contact position in the state of And a post-shrinkage step of thermally shrinking a region other than between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions that are in contact with each other. It should be noted that in the covering step, “opening of all the air vent holes arranged in the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions that are in contact with each other in the state of the container group. It should be understood that “the total area is larger than the total opening area of all the air vent holes arranged in other areas” means the state of the packaging material before heat shrinkage. Nor.

In the invention according to claim 3, the entire container group in which a plurality of containers are gathered in an upright state so that the body part comes into contact is completely wrapped with a packaging material made of a heat-shrinkable film in which air vent holes are formed, and is heated and shrunk. in the overlap wrapping body was, the container is 20% uppermost and lowermost length of the contact position 置間 cylindrical body of the maximum diameter of the container height in contact with each other in a state of the container groups 50 % of while have a length, and have a length container height 80% to 50% of the length of the non-contact portion including a conical Taido part not in contact with each other in a state of the container group, the the packaging material, which is only air vent holes in the corresponding region between the neighboring contact position of highest to near the contact position of the least significant formation of the cylindrical body portion of the maximum diameter in contact with each other in a state of the container group , by heat shrunk packaging material 80 of the container height in each container of the container group Each container of the container group is in contact with the cylindrical body having the maximum diameter in each container without tilting in a direction in which the non-contact parts including the truncated cone body having a length of 50% approach each other. It is characterized by being overwrapped in an upright state .

In the invention according to claim 4, the entire container group in which a plurality of containers are gathered in an upright state so that the body part comes into contact is completely wrapped with a packaging material made of a heat-shrinkable film in which air vent holes are formed. in the overlap wrapping body was, the container is 20% uppermost and lowermost length of the contact position 置間 cylindrical body of the maximum diameter of the container height in contact with each other in a state of the container groups 50 % of while have a length, and have a length container height 80% to 50% of the length of the non-contact portion including a conical Taido part not in contact with each other in a state of the container group, the Openings of all the air vent holes arranged in the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the cylindrical body of the largest diameter that contacts each other in the state of the container group in the packaging material The total area of all air vents arranged in other areas It is 4 times the sum of the mouth area, the heat shrunk packaging material, mutually non-contacting portion including a conical Taido portion having a vessel height of 80% to 50% of the length of the respective containers of the container group Each container of the container group is overlap-wrapped in an upright state in contact with each other at the cylindrical body of the maximum diameter in each container without tilting in the approaching direction .

  The “overlap package” here means that the entire container group is completely wrapped by the packaging material, and the packaging group is exposed without being covered by the packaging material. The body is not included in the “overlap package” referred to herein.

  In addition, the term “between the uppermost contact position and the lowest contact position of the body parts that are in contact with each other in the state of the container group” means between the uppermost contact position and the lowest contact position. This includes not only the case where all the contacts are in contact but also the case where a non-contact portion exists between the uppermost contact position and the lowermost contact position.

  In addition, in such an overlap package, a perforation for opening may be formed so that the body portion of the container in the packaging material does not contact, but such a perforation for opening is formed. Since such micropores are not provided for heat-shrinking the packaging material, they are not included in the “air vent”.

  As described above, in the method for manufacturing an overlapped package according to the first aspect of the present invention, in the covering step, from the vicinity of the uppermost contact position to the lowermost contact position of the body portions that are in contact with each other in the state of the container group. The entire container group is completely wrapped by the wrapping material so that the air vent hole is arranged only in the corresponding region until the time of the contraction of the body parts that are in contact with each other in the state of the container group in the wrapping material in the pre-shrink process. After heat shrinking the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position, in the post-shrink process, the uppermost part of the body part in the packaging group in contact with each other in the state of the container group Since the region other than between the vicinity of the contact position of the container and the vicinity of the lowest contact position is thermally contracted, the portion corresponding to the contact portion of the container body in the packaging material is first thermally contracted and the container body The contact part of the After being securely bundled I, portions corresponding to the non-contact portion of the container body in the packaging material will be heat-shrinkable.

  In this way, since the contact portion of the container body is already bound by the packaging material before the portion of the packaging material corresponding to the non-contact portion of the container body is thermally contracted, the container body in the packaging material is Even if the part corresponding to the non-contact part of the part shrinks thermally, the container does not tilt in the direction in which the non-contact part of the body part approaches each other due to the heat shrinkage stress, and the overlap package is finished neatly Can do.

請 Motomeko 3 according overlap package of the invention is in the packaging material, between the neighboring contact position of the top of the cylindrical body portion of the maximum diameter in contact with each other in a state of the container group to the vicinity contact position of the least significant Since the air vent hole is formed only in the area corresponding to, the area corresponding to the area between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the cylindrical body having the largest diameter is focused first. By heating, while the internal air is exhausted from the air vent hole, only the heated part is mainly thermally contracted, so that the cylindrical bodies having the largest diameter that are in contact with each other are securely bound by the packaging material. By the heat-shrinkable packaging material, each container does not incline in a direction in which non-contact parts including a truncated cone body having a length of 80% to 50% of the container height in each container of the container group approach each other. The container with the largest diameter cylindrical body Each container is overlapped packaged in an upright position in contact with the.

  Moreover, in the manufacturing method of the overlap package of the invention which concerns on Claim 2, in a covering process, it is between the uppermost contact position vicinity of the trunk | drum which mutually contacts in the state of a container group, and the lowest contact position vicinity. The packaging material is used to wrap the entire container group so that the sum of the opening areas of all the air vent holes arranged in the region corresponding to is larger than the sum of the opening areas of all the air vent holes arranged in the other regions. In the pre-shrinking process, the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body parts that are in contact with each other in the state of the container group is thermally contracted in the pre-shrink process. Thereafter, in the post-shrinking step, the region other than the region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions in contact with each other in the state of the container group in the packaging material is thermally contracted. So the packaging material The part corresponding to the non-contact part of the container body in the packaging material after the part corresponding to the contact part of the container body in the container is heat-shrinked relatively quickly and the contact part of the container body is securely bound by the packaging material Will heat shrink with a delay.

  Therefore, in the same manner as in the method for manufacturing an overlapped package of the invention according to claim 1, before the portion corresponding to the non-contact portion of the container body in the packaging material is thermally contracted, the contact portion of the container body is the packaging material. After that, even if the portion of the packaging material corresponding to the non-contact portion of the container body portion is thermally contracted, the non-contact portions of the body portion are brought closer to each other by the heat shrinkage stress. The container is not tilted and the overlap package can be finished neatly.

According to a fourth aspect of the present invention, there is provided an overlapped packaging body between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the cylindrical body having the largest diameter in contact with each other in the state of the container group in the packaging material. Since the sum of the opening areas of all the air vent holes arranged in the corresponding region is four times or more than the sum of the opening areas of all the air vent holes arranged in the other regions, the cylinder with the maximum diameter in the packaging material By primarily heating the corresponding area between the vicinity of the uppermost contact position of the body and the vicinity of the lowermost contact position, only the heated portion mainly heat-shrinks, thereby contacting each other. The cylindrical body having the maximum diameter is surely bound by the packaging material, and the heat-shrinkable packaging material has a length of 80% to 50% of the container height in each container of the container group. Non-contact parts including Without tilting each container in the direction, being over-wrap packaging in a state in which the container vessel group a cylindrical barrel of maximum diameter upright in contact.

(A) is a top view which shows one Embodiment of the overlap package which concerns on this invention, (b) is a side view which shows the same overlap package. It is explanatory drawing for demonstrating the manufacturing method of an overlap packaging body same as the above. It is a top view which shows the packaging material used for an overlapping package body same as the above. (A) is sectional drawing which shows the state which formed the packaging material same as the above in the shape of a cylinder, and inserted the goods group, (b) is a side view which shows the state same as the above. (A) is a top view which shows the intermediate packaging body before heat-shrinking a packaging material, (b) is a side view which shows the intermediate packaging body same as the above, (c) is an end elevation which shows an intermediate packaging body same as the above. (A), (b) is a schematic sectional drawing which shows a shrink tunnel. (A) is a top view which shows the overlap wrapping body which is other embodiment, (b) is a side view which shows an overlap wrapping body same as the above, (c) is an end view which shows an overlap wrapping body same as the above. . It is a side view which shows the overlap package which is other embodiment. (A), (b) is a side view which shows the modification of the container applicable to this invention. (A) is a side view showing a product in a container having a long body contact portion, (b) is an overlap package in which an overlap package is applied to a product group in which three products in a container are assembled in a horizontal row. FIG. (A) is a side view showing a product in a container with a short contact portion of the trunk, and (b) is an overlap packaging using a conventional method on a product group in which three products in a container are assembled in a horizontal row. It is a side view which shows the overlapped package which was made.

  Hereinafter, embodiments will be described with reference to the drawings. Fig.1 (a), (b) has shown the overlap package 1 of this invention. As shown in the figure, the overlap wrapping body 1 includes a body bb (a cylindrical portion P1 having a maximum diameter and a truncated cone portion P2) and a product Bb in a container having a lid portion (a small cylindrical portion P3). After three pieces are gathered in a horizontal row in a standing state so that the bbs are in contact with each other, the product group Gb is subjected to three-way pillow wrapping with the wrapping material 10 made of a heat-shrinkable film so that there is no exposed portion, and then the wrapping material 10 is heat-shrinked, and unlike the conventional overlap package 50b shown in FIG. 11 (b), the outer two container-filled products Bb are not inclined, and the three container-filled products Bb They are all bundled up by the packaging material 10 in an upright state.

  The glass bottle as a container constituting the commodity Bb in the container has a cylindrical portion P1 having a maximum diameter that is in contact with each other in the state of the commodity group Gb (shaded display portion in FIG. 1) in the lower half of the body bb. The cylindrical portion (contact portion) P1 is positioned and has a length (height) Lb of about 40% of the height Hb of the packaged product Bb.

  The packaging material 10 is, for example, a single-layer or multi-layer biaxially stretched film such as polyolefin such as low-density polyethylene, linear low-density polyethylene, or polypropylene, or polyvinyl chloride, and at least the surface has heat sealability. The heat shrinkable film has a heat shrinkage rate of about 20% to 50% in the vertical and horizontal directions.

  The packaging material 10 has a diameter of about 1 mm only in a region corresponding to the cylindrical portion P1 between the uppermost contact position UP and the lowermost contact position DP in the body portions bb that are in contact with each other in the state of the commodity group Gb. A plurality of air vent holes 11 are formed over the entire circumference in two rows in the upper and lower sides, and a fusing seal portion 12 extending in the alignment direction of the packaged product Bb is formed on the portion corresponding to the bottom surface of the packaged product Bb. In portions corresponding to both end portions in the alignment direction, fusing seal portions 13 and 13 extending upward from the both end portions of the fusing seal portion 12 along the trunk portion bb of the packaged product Bb are formed.

  The overlap package 1 configured as described above is manufactured as follows. First, as shown in FIG. 2, the packaging material 10 is fed out from the packaging material roll PR in which the long strip-shaped packaging material 10 having a predetermined width is wound in a roll shape by the feed roller 21, and the feeding direction of the packaging material 10. As shown in FIG. 3, by punching the substantially circular air vent holes 11 having a diameter of 0.7 mm at a pitch of 14 mm by the punching roller 22 having a large number of punching needles arranged on the downstream side of Two rows of air vent holes HL are formed on both sides in the width direction across the center line CL of the packaging material 10.

  In this way, as shown in FIGS. 2, 4 (a) and (b), the packaging material 10 in which two rows of air vent hole rows HL are formed on both sides in the width direction is shaped by the former 23 as shown in FIGS. A product in an upright state in which both end portions of the packaging material 10 are fused and sealed along the delivery direction of the packaging material 10 by the vertical sealer 24 and formed into a cylindrical shape, and the three product containers Bb are gathered in one row. The group Gb is inserted into the packaging material 10 formed in a cylindrical shape. At this time, as shown in FIG. 4B, the air vent hole row HL is disposed only in the region corresponding to the cylindrical portion (shaded display portion in FIG. 4) of the body portion bb that are in contact with each other in the state of the product group Gb. As shown, the formation position of the air vent hole row HL relative to the packaging material 10, the fusing seal position, and the like are set.

  Subsequently, as shown in FIG. 2 and FIGS. 5A and 5B, the front and rear ends of the product group Gb in the tubular packaging material 10 are fused and sealed by the horizontal sealer 25, and the product group Gb is sealed by the packaging material 10. On the other hand, an intermediate package IP with three-way pillow packaging is completed.

  Thus, the intermediate package IP in which the entire container group Gb is completely wrapped by the packaging material 10 is conveyed to the shrink tunnel 30 shown in FIGS. 6A and 6B and passes through the shrink tunnel 30. In the meantime, the packaging material 10 is thermally contracted, and the product group Gb is bound by the packaging material 10.

  As shown in FIG. 2A, the shrink tunnel 30 is formed on the cylindrical portion (shaded display portion in FIG. 1) of the trunk portion bb of the packaged product Bb in the packaging material 10 constituting the intermediate package IP. It is divided into an initial shrinkage zone Z1 that mainly heat-shrinks the corresponding region, and a finishing zone Z2 that heat-shrinks the packaging material 10 of the intermediate package IP as a whole. A hot air blowing box 31a, in which hot air blowing holes are arranged in two upper and lower stages, is provided at lower portions on both sides of the transport path of the intermediate package IP so that hot air can be blown only on the cylindrical portion of the body bb of the product Bb. In addition, the finishing zone Z2 is provided with a hot air blowing box 31b in which hot air blowing holes are arranged in six upper and lower stages so that hot air can be blown over the entire intermediate package IP. It is disposed on opposite sides of the body IP transport path.

  Therefore, in the initial contraction zone Z1 through which the intermediate package IP passes first, only the region corresponding to the cylindrical portion of the body portion bb in contact with each other in the state of the product group Gb in the packaging material 10 is preferentially heated. Since the air vent hole 11 is disposed only in that region, the air inside the intermediate package IP is discharged from the air vent hole 11 and only the heated portion is mainly thermally contracted, and thereby the cylinders that are in contact with each other. The cylindrical portion of the part bb is surely bound by the packaging material 10.

  In this way, the intermediate packaging body IP in which the cylindrical portions of the body portions bb that are in contact with each other in the packaged product Bb are reliably bound by the packaging material 10 is subsequently sent to the finishing zone Z2, and the inside of the finishing zone Z2 By being entirely heated when passing, the packaging material 10 is thermally contracted as a whole, and the above-described overlap package 1 is completed.

  As described above, in this method of manufacturing an overlapped package, before the region corresponding to the non-contact portion (the truncated cone portion P2) of the body portion bb of the packaged product Bb in the packaging material 10 is thermally shrunk, Since the contact portion (maximum diameter cylindrical portion P1) of the body portion bb of the product Bb is already bundled by the packaging material 10, the non-contact portion (the truncated cone portion P2) of the body portion bb in the packaging material 10 is thereafter used. Even if the corresponding region is thermally contracted, the product Bb contained in the container does not tilt in the direction in which the non-contact parts (conical part P2) of the body part bb approach each other due to the thermal contraction stress. Overlap packaging can be neatly applied in a state where all the incoming products Bb are upright.

  In the above-described embodiment, the length between the uppermost contact position and the lowermost contact position of the body bb in contact with each other in the state of the product group Gb is about 40% of the total height. The case where the product Bb is in a container having a height (height) has been described, but the package is not limited to such a container, but the lowest position from the highest contact position in the mutually contacting barrels The present invention can be applied to a container having a length (height) of 20% to 50% of the total height between the contact positions.

  As described above, the present invention is intended for a container having a length (height) of 20% to 50% of the total height between the uppermost contact position and the lowermost contact position in the mutually contacting barrels. The reason is that if the length between the uppermost contact position and the lowermost contact position in the body part is less than 20% of the total height, sufficient holding power can be obtained even if the part is bound first by the packaging material. This is because the region corresponding to the non-contact portion of the body portion of the packaging material cannot be secured and loses the heat shrinkage stress when heat shrinking, and the container itself tends to tilt. This is because the container does not tilt even if a manufacturing method similar to the conventional one is adopted.

  Moreover, although the embodiment mentioned above demonstrated the overlap package 1 which gave the overlap package to the goods group Gb which gathered the goods Bb containing three containers in the horizontal state in the standing state, FIG. Like the overlap package 2 shown in a) to (c), it is also possible to apply overlap wrap to the product group Gc in which the six product Bb in a container are gathered in two horizontal rows in a standing state, The number of containers to be packaged is not particularly limited.

  Further, in the above-described embodiment, all the air vent holes in the region corresponding to the region between the uppermost contact position and the lowermost contact position in the body portion bb that are in contact with each other in the state of the commodity group Gb in the packaging material 10. However, the present invention is not limited to this, and it is not limited to this, and is near the uppermost contact position (for example, a position about 20 mm above the uppermost contact position) to the lowermost contact position (for example, the uppermost contact position). If the air vent hole is formed between the lower contact position and a position about 20 mm below, the overlap packaging can be finished neatly.

  In the above-described embodiment, the air vent hole 11 is provided only in a region corresponding to the cylindrical portion between the uppermost contact position UP and the lowermost contact position DP in the body portions bb that are in contact with each other in the state of the commodity group Gb. However, the present invention is not limited to this. For example, like the overlap package 3 shown in FIG. 8, it corresponds to the cylindrical portion of the body portion bb that is in contact with each other in the state of the product group Gb. It is possible to form the air vent 11b in the region and also form the air vent 11b in the region corresponding to the non-contact portion of the body bb that is not in contact with each other in the state of the product group Gb.

  However, in that case, the vicinity of the uppermost contact position (for example, a position about 20 mm above the uppermost contact position) of the body bb that contacts each other in the state of the product group Gb to the vicinity of the lowermost contact position ( For example, the total sum of the opening areas of all the air vent holes 11a arranged in the corresponding region between the lowermost contact position and the position about 20 mm below the lowermost contact position is all the air arranged in the other regions. It is necessary to wrap the product group Gb with the wrapping material 10 so as to be larger than the sum of the opening areas of the holes 11b, and preferably [the sum of the opening areas of the air holes 11a / the sum of the opening areas of the air holes 11b]. 4 or more, more preferably 8 or more. When [the sum of the opening areas of the air vent holes 11a / the sum of the opening areas of the air vent holes 11b] is less than 4, the portion corresponding to the contact portion of the body portion bb of the packaged product Bb in the packaging material 10 is focused first. Even when heated, not only the contact portion of the body portion bb of the packaged product Bb in the packaging material 10 but also the portion corresponding to the non-contact portion is thermally contracted to some extent, so only the contact portion of the body portion bb of the packaged product Bb It is because it becomes difficult to unite reliably.

  In order to make the sum of the open areas of all the air vent holes 11a larger than the sum of the open areas of all the air vent holes 11b, the number of the air vent holes 11a is made larger than the number of the air vent holes 11b, What is necessary is just to adjust by making a diameter larger than the diameter of the air vent hole 11b.

  Further, in the above-described embodiment, the space between the uppermost contact position UP and the lowermost contact position DP of the body portions bb that are in contact with each other in the state of the product group Gb is the container with the cylindrical portion P1 having the maximum diameter. Although the product Bb has been described, the present invention is not limited to this, and the length between the uppermost contact position and the lowermost contact position in the mutually contacting body portions is 20% to 50% of the total height (high )), For example, as shown in FIG. 9A, in a container Bc, from the uppermost contact position UP to the lowermost contact position DP in the body bc (in the same figure Since the hollow portion h is present in the shaded display portion), the shape may be such that there is a non-contact portion therebetween. In other words, in the case of this product Bc in a container, “the length between the uppermost contact position and the lowermost contact position in the mutually contacting body portions is 20% to 50% of the total height (height). "Having" means that the length Lc between the uppermost contact position UP and the lowermost contact position DP including the recess h is 20% to 50% of the total height Hc (height). It means that you are doing.

  Moreover, although embodiment mentioned above demonstrated the container containing goods Bb in which the cylindrical part P1 of the largest diameter which mutually contacts in the state of the goods group Gb is located in the lower half part of trunk | drum bb, it is limited to this. For example, a contact portion between the uppermost contact position UP and the lowermost contact position DP in the trunk portion bd (such as the net shown in the figure), as in the case of a product Bd in a container shown in FIG. The container in which the hanging display portion is present in the middle part of the body part bd may be used. However, the length Ld between the uppermost contact position UP and the lowermost contact position DP has a length (height) of 20% to 50% of the total height Hd.

  Moreover, although embodiment mentioned above demonstrated the product Bb with a circular cross section, it is not limited to this, This invention is applied also to a container with a rectangular or polygonal cross section. It goes without saying that it can be done. In the case of a polygonal container, the outermost plane part of the trunk part comes into contact.

  Further, in the above-described embodiment, in the process of transporting the packaged products, the plurality of packaged products overlap with each other in a state in which the fronts are faced so that all front faces in a predetermined direction. For example, in a state where a plurality of products in a container are connected to each other with an adhesive tape (for example, a state in which the adhesive tape is attached to the bottom of the product in a container) in order to maintain the front-facing state. It is also possible to apply overlap packaging.

  In addition, it is also possible to apply overlap packaging with a plurality of containers in a state where they are placed on the tray. You may mutually connect with an adhesive tape.

  In the above-described shrink tunnel 30, the packaging material 10 of the intermediate package IP is heated by blowing hot air. However, the present invention is not limited to this. Water vapor, superheated water vapor, far infrared heater, near infrared heater It is also possible to heat with a halogen lamp or the like.

  INDUSTRIAL APPLICABILITY The present invention can be used when overlapping packaging is applied to a container group in which a plurality of containers are assembled in an upright state.

1, 2, 3 Overlap package 10 Wrapping material 11, 11a, 11b Air vent 12, 13 Fusing seal part 21 Feed roller 22 Perforating roller 23 Former 24 Vertical sealer 25 Horizontal sealer 30 Shrink tunnel 31a, 31b Hot air blowing box Bb, Bc, Bd Products in containers (containers)
bb, bc, bd trunk Gb, Gc product group (container group)
h Recessed part HL Air vent hole IP Intermediate package PR Packaging roll P1 Largest diameter cylindrical part P2 Frustum part P3 Small diameter cylindrical part UP Uppermost contact position DP Lowermost contact position Z1 Initial contraction zone Z2 Finishing zone

Claims (4)

Manufacture of an overwrapping body in which the entire container group in which a plurality of containers are erected in such a manner that the body part comes into contact is completely wrapped with a packaging material made of a heat-shrinkable film formed with air vent holes, and is heat-shrinked. A method,
The container has a length of 20% to 50% of the height of the container between the uppermost contact position and the lowermost contact position of the body portions that contact each other in the state of the container group,
By the packaging material, the container is arranged so that air vent holes are arranged only in a region corresponding to a region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions that are in contact with each other in the state of the container group. A covering process that completely envelops the entire group;
A pre-shrinking step of thermally shrinking a corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions in contact with each other in the state of the container group in the packaging material;
A post-shrinkage step of thermally shrinking a region other than between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions in contact with each other in the state of the container group in the packaging material A method for producing an overlapped package characterized by the above. Manufacture of an overwrapping body in which the entire container group in which a plurality of containers are erected in such a manner that the body part comes into contact is completely wrapped with a packaging material made of a heat-shrinkable film formed with air vent holes, and is heat-shrinked. A method,
The container has a length of 20% to 50% of the height of the container between the uppermost contact position and the lowermost contact position of the body portions that contact each other in the state of the container group,
The sum of the opening areas of all the air vent holes arranged in the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the barrels that are in contact with each other in the state of the container group, A covering step of completely wrapping the entire container group with the packaging material so as to be larger than the sum of the opening areas of all the air vent holes arranged in the region of
A pre-shrinking step of thermally shrinking a corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions in contact with each other in the state of the container group in the packaging material;
A post-shrinkage step of thermally shrinking a region other than between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the body portions in contact with each other in the state of the container group in the packaging material A method for producing an overlapped package characterized by the above. In the overlap package in which the entire container group in which a plurality of containers are gathered upright so that the body part comes into contact is completely wrapped with a packaging material made of a heat-shrinkable film in which air vent holes are formed and heat-shrinked,
The container, with the length of the uppermost and lowermost contact position 置間 cylindrical barrel of maximum diameter in contact with each other in a state of the container group to have a 20% to 50% of the length of the container height , and have a length container height 80% to 50% of the length of the non-contact portion including a conical Taido part not in contact with each other in a state of the container groups,
In the packaging material, air vent holes are formed only in the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the cylindrical barrels having the largest diameter that contact each other in the state of the container group. Each container inclines in a direction in which non-contact parts including a truncated cone body having a length of 80% to 50% of the container height in each container of the container group approach each other by the heat-shrinkable packaging material. And an overlap package in which the containers of the container group are in an upright state in contact with each other at the cylindrical body of the largest diameter in each container . In the overlap package in which the entire container group in which a plurality of containers are gathered upright so that the body part comes into contact is completely wrapped with a packaging material made of a heat-shrinkable film in which air vent holes are formed and heat-shrinked,
The container, with the length of the uppermost and lowermost contact position 置間 cylindrical barrel of maximum diameter in contact with each other in a state of the container group to have a 20% to 50% of the length of the container height , and have a length container height 80% to 50% of the length of the non-contact portion including a conical Taido part not in contact with each other in a state of the container groups,
In the packaging material, all of the air vent holes arranged in the corresponding region between the vicinity of the uppermost contact position and the vicinity of the lowermost contact position of the cylindrical body of the maximum diameter that contact each other in the state of the container group The sum of the opening areas is at least four times the sum of the opening areas of all the air vent holes arranged in the other areas ;
By the heat-shrinkable packaging material, each container does not tilt in a direction in which non-contact parts including a truncated cone body having a length of 80% to 50% of the container height in each container of the container group approach each other, An overlap wrapping body , wherein the containers in the container group are in an upright wrapping state in contact with each other at a cylindrical body having a maximum diameter in each container .

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