JP2002128136A - Packaging member, thermal shrinkage packaging material and packaging method with shrink system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging member having a more beautiful packaged state. SOLUTION: There is provided a packaging member 1 having a flat rectangular parallelepiped case 2 storing a stored member therein which an entire surface of the case 2 is shrinkingly packaged with a thermal shrinkage packaging material 3. The thermal shrinkage packaging material 3 is formed with a circumferential edge region at a main surface 2a of the case 2, an opening 5a formed at the case 2, a recess segment formed at the main surface 2a or either a recess 7 or a through hole capable of discharging air inside the packaging member 1, at the time of thermal shrinkage operation at a segment opposing against an alignment portion between composing surfaces 2a, 2c constituting the case 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package in which a recording medium such as a magnetic recording medium or an optical recording medium is entirely shrink-wrapped with a heat-shrinkable packaging material, a heat-shrinkable packaging material for shrink packaging, And a packaging method using a shrink method.

[0002]

2. Description of the Related Art A flat rectangular parallelepiped case containing an MD (Mini Disc) or a magnetic tape is wrapped in a heat-shrinkable wrapping material (for example, a heat-shrinkable film base material), and an overlapping portion of the heat-shrinkable wrapping material is heated. Shrink wrapping is conventionally performed in which a case is wrapped by heat-shrinking the heat-shrinkable wrapping material and heat-shrinking it.

As a package of this type, for example, FIG.
Is conventionally known. In this package 51, for example, a flat rectangular parallelepiped case 5 containing an MD
2 (see FIG. 15), and the entire surface of the case 52 is shrink-wrapped with a strip-shaped film base 53 obtained by cutting the heat-shrinkable film base into strips. In this case, the overlapping portion W of the body of the strip-shaped film substrate 53
Are located on the side surface 52c of the case 52, and the overlapping portions X of the side attachments are respectively located on the pair of side surfaces 52d and 52e adjacent to the side surface 52c. Further, a notch 6 for tearing is formed at the upper end of the strip-shaped film base material 53 folded on the side surface 52c for sticking the body. Note that, of the surfaces of the case 52, two surfaces having a large area are referred to as main surfaces, and the other surfaces are referred to as side surfaces.

[0004] Next, a case 52 using a heat-shrinkable packaging material.
The outline of the shrink wrapping method is described below. In this case, the heat-shrinkable packaging material to be used is formed of a long strip-shaped heat-shrinkable film base material, and is usually wound into a core material such as a paper tube and formed in a roll shape. In addition, one case 52 is provided for the heat-shrinkable packaging material.
For each unit area having a length required to package the product, a design, a character, or the like is printed, and a cut 6 for cutting is provided.
Are cut at the boundary of the unit area along the longitudinal direction of the heat-shrinkable packaging material.

[0005] First, the heat-shrinkable wrapping material wound up in a roll is sequentially unwound. Next, after transporting the fed heat-shrinkable wrapping material to the vicinity of the case 52, the film material is sequentially cut into unit regions, thereby forming a strip-shaped film base material corresponding to an amount necessary for packaging one case 52. 53 is manufactured (cutting step). Next, the strip-shaped film substrate 5
3 is folded in two, the case 52 is sandwiched, and the strip-shaped film base material 53 is wound so as to be in close contact with each surface of the case 52, and then the body is attached (body attaching step). At this time,
As shown in FIG. 15, the ends 53 a and 53 b of the strip-shaped film substrate 53 are overlapped on the side surface 52 c of the case 52. As a result, the overlapping portion W of the body paste is moved to the side surface 52c.
Located on top. In this case, each end 53a, 53b of the strip-shaped film substrate 53 is connected to the side surface 52c of the lower end 53b.
Is shorter than the width D of the side surface 52c (thickness of the case 52), and the width L of the overlapping portion W of the body sticking
3 is the length L of the cut 6 formed in the upper end 53a.
It is superimposed so that it is shorter than 2. Therefore,
The end face of the end 53b, the lower face of the end 53a, and the case 5
The communication path 8 having substantially the same thickness as the strip-shaped film substrate 53 is formed between the two side surfaces 52c along the length direction of the side surface 52c.

Next, by heating the overlapping portion W of the body paste, the strip-shaped film base material 53 is melted and adhered to each other. Subsequently, the side open ends of the strip-shaped film base material 53 are folded into the respective side surfaces 52 d of the case 52.
Overlap on 52e. After this, the side surfaces 52d, 52
e, the overlapping portion (overlapping portion of side application) X of the strip-shaped film substrate 53 is heated and adhered (side application process). Thereby, the case 52 is packaged and sealed by the strip-shaped film base material 53 by a so-called caramel packaging method. In this state, as shown in FIG.
A small gap 15 is formed between the main surfaces 52 a and 52 b of the case 52 and the strip-shaped film base material 53. Next, the wrapped case 52 is passed through the hot air drying oven. At this time, as shown in FIG. 3B, the air trapped in the gap 15 between the surface of the case 52 and the strip-shaped film substrate 53 thermally expands, and at the same time, the strip-shaped film substrate 53 Begins to contract. After this, FIG.
As shown in FIG. 5, a strip-shaped film substrate 53 and a case 52
Trapped in the gap 15 between the main surfaces 52a and 52b is discharged to the outside of the strip-shaped film base material 53 through the communication path 8 and the cut 6 as shown in FIG. Then, the strip-shaped film substrate 53 adheres to each surface of the case 52 (heat shrinking step). Thus, the packaging process of the case 52 by the shrink method is completed.

[0007]

However, this package 51 has the following problems. That is, in the package 51, when the strip-shaped film substrate 53 is heat-shrinked and brought into close contact with the surface of the case 52, the air trapped in the gap 15 passes through the communication path 8 and the notch 6 to form the strip-shaped film base. It is discharged outside the material 53. However, in the state where the heat of the strip-shaped film substrate 53 is advanced and the strip-shaped film substrate 53 is strongly adhered to the side surface 52c, the air particularly on the main surface 52a side is hardly discharged to the outside, and the strip-shaped film substrate 53 is hardly discharged. By the time the thermal contraction of 53 is completed, a situation arises in which the thermally expanded air still remains on the main surface 52a side. Similarly, when the strip-shaped film substrate 53 is thermally contracted, the strip-shaped film substrate 53 is brought into close contact with the corner between the side surface 52c and the main surface 52b of the case 52, thereby causing the heat-shrinkage of the strip-shaped film substrate 53. By the time, the air that has been thermally expanded still stays on the main surface 52b side. Therefore, the temperature of the strip-shaped film base material 53 at the portion opposed to the main surfaces 52a and 52b decreases in a state where it cannot be completely shrunk due to stagnation of the expanded air. For this reason, wrinkles are generated on the main surfaces 52a and 52b, so that the package 51 has a problem that the appearance is deteriorated. In addition, immediately after passing through the hot-air drying oven, as described above, the strip-shaped film base material 53 expands without shrinking due to the thermal expansion of the air. When performing the operations continuously, there is a problem that it becomes difficult to store a predetermined quantity.

The present invention has been made in view of the above problems, and has as its main object to provide a more beautifully wrapped package. Another object of the present invention is to provide a heat-shrinkable wrapping material that does not easily wrinkle when the case is shrink-wrapped. It is another object of the present invention to provide a packaging method capable of beautifully wrapping a case with a heat-shrinkable packaging material.

[0009]

According to a first aspect of the present invention, there is provided a package having a flat rectangular parallelepiped case in which an object to be stored is accommodated, wherein the entire surface of the case is shrink-wrapped with a heat-shrinkable packaging material. Wherein the heat-shrinkable packaging material is a peripheral region on the main surface of the case, an opening formed in the case, a concave portion formed on the main surface, or a component material forming the case. A cutout or a through-hole is formed at a portion facing the joint between the two so that the air inside the package can be discharged at the time of heat shrinkage. In the present invention, the “principal surface” means two surfaces having the largest area of a flat rectangular parallelepiped.

A package according to a second aspect of the present invention is provided with a flat rectangular parallelepiped case in which an object to be stored is accommodated, and is attached to the body in a state where two main surfaces and two side surfaces of the case are covered with a heat-shrinkable packaging material. In addition, the entire surface of the case is shrink-wrapped in a state where it is stuck on each of the other two side surfaces of the case, and the first end for tearing is formed at the upper end of the heat-shrinkable packaging material at the overlapping portion of the body stuck. A package in which cuts are formed, wherein the heat-shrinkable packaging material is configured such that the air inside the package is thermally shrunk at the upper end or the lower end in the overlapping portion of the body paste. The second notch capable of being discharged is formed separately from the first notch. In the present invention, the “side surface” means the other four surfaces except the main surface of the flat rectangular parallelepiped.

A package according to a third aspect of the present invention is the package according to the second aspect, characterized in that the package is shrink-wrapped so that an overlapping portion of the body is located on the first side surface of the case. .

According to a fourth aspect of the present invention, there is provided the package according to the third aspect, wherein a gap communicating with the inside of the case is provided between the first side surface and the main surface of the case. The second cut is formed along a side surface of the first cut-out, and the second cut is cut to a position facing the gap.

The heat-shrinkable wrapping material according to the fifth aspect is formed of a strip-shaped heat-shrinkable film base material, is cut into strips, and covers the entire surface of a flat rectangular parallelepiped case accommodating an object to be accommodated. A heat-shrinkable wrapping material for shrink wrapping that is heat-shrinkable, and constitutes a peripheral region on a main surface of the case, an opening formed in the case, a concave portion formed in the main surface, or the case. A cut or through hole is formed at a portion facing the seam between the components so that the air inside the package covered with the heat-shrinkable packaging material can be discharged at the time of heat shrinkage.

[0014] The heat-shrinkable packaging material according to claim 6 is formed of a strip-shaped heat-shrinkable film base material and cut into strip-shaped film base materials on the first surface of the packaged object. The heat for shrink wrapping is attached to the body and side attached at two other second surfaces orthogonal to the first surface and facing each other, and is thermally shrunk while covering the entire surface of the object to be wrapped. A shrinkable packaging material, wherein a first cut for tearing is formed at a portion corresponding to one end of the overlapping portion of the body paste, and the package is covered with the heat shrinkable packaging material. In a portion corresponding to the other end of the overlapping portion of the body pasting, such that a second cut capable of discharging air inside the body at the time of heat shrinkage is located on substantially the same straight line as the first cut. Being formed And it features.

The heat-shrinkable wrapping material according to claim 7 is the heat-shrinkable wrapping material according to claim 6, wherein the first and second heat-shrinkable wrapping materials are different from each other.
The notch is made to correspond to the one end of one of the two continuous strip film bases in the uncut state, and the other end of the other strip film base. It is characterized in that it is cut integrally with the part to be cut.

In the shrink packaging method according to the present invention, when shrink-wrapping the entire flat rectangular parallelepiped case in which the storage object is stored, the notch capable of discharging the air inside the package covering the case upon heat shrinkage. Or a cutting step of cutting the strip-shaped heat-shrinkable film base material in which the through-hole is formed into strip-shaped film base materials, a peripheral region on the main surface of the case, an opening formed in the case, and the main surface. A body sticking step of body sticking the strip film to the case such that the cut or the through hole faces a part of a joint formed between the formed concave portions or the components constituting the case; By performing a side sticking step of sticking a film to the case side and a heat shrinking step of heating and shrinking the strip-shaped film, the case is formed. And wherein the packaging.

According to a ninth aspect of the present invention, in the shrink packaging method, when the entire surface of a flat rectangular parallelepiped case in which an object to be stored is stored is shrink-packed, the air inside the package covering the case can be discharged upon thermal contraction. Alternatively, the through-hole is made to face a peripheral region on the main surface of the case, an opening formed in the case, a concave portion formed on the main surface, or a joint portion between components constituting the case. A forming step of forming a strip film base, a body sticking step of sticking the strip film to the case such that the cut or the through hole faces the part, and the strip film to the case. Wrapping the case by performing a side sticking step of side sticking and a heat shrinking step of heating and shrinking the strip film by heat; And it features.

According to a tenth aspect of the present invention, there is provided a packaging method using the shrink method, wherein the strip-shaped heat-shrinkable film substrate is cut into a strip-shaped film substrate. Is performed prior to the forming step.

The shrink packaging method according to claim 11, wherein the entire surface of the flat rectangular parallelepiped case accommodating the object to be accommodated is shrink-packed using a heat-shrinkable packaging material for shrink packaging. As a shrinkable wrapping material, formed in a strip-shaped heat-shrinkable film base material, and cut into strip-shaped film base materials, the case is stuck on the first side surface of the case and the first side surface. A packaging material that is side-attached on two second side surfaces that are orthogonal to each other and that is heat-shrinkable in that state, wherein a first cut for tearing is provided at one end of an overlapping portion of the body attachment The second notch formed in the portion corresponding to the above, and capable of discharging the air inside the package covered with the packaging material at the time of heat shrink when shrink wrapping,
So as to be located on substantially the same straight line as the first cut,
Assuming that a packaging material formed at a portion corresponding to the other end of the overlapping portion of the body pasting is used, the strip-shaped film substrate is cut by cutting the band-shaped heat-shrinkable film substrate. A cutting step of processing, and applying the strip-shaped film to the case so that the other end faces the first side surface and the one end overlaps the surface side of the other end. Packaging the case by performing a body sticking step, a side sticking step of sticking the strip film to the case side, and a heat shrinking step of heating and shrinking the strip film by heat. I do.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a package, a packaging material and a shrink packaging method according to the present invention will be described below with reference to the accompanying drawings. Note that the same components as those of the conventional packaging body 51 and the strip-shaped film substrate 53 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 1, the package 1 is provided with a case 2 (see also FIG. 2) as a package containing a MD or the like, and the entire surface of the case 2 is a strip-shaped heat-shrinkable packaging material ( (A strip-shaped film base material) 3 is shrink-wrapped. In this case, as shown in FIG. 2, the case 2 is a flat rectangular parallelepiped and is formed of a synthetic resin material. In the case 2, one of the four side surfaces (the lower surface in the figure) is opened, and the opening portion is an insertion slot 4 for inserting the MD.
Function as Further, one main surface 2a of the two main surfaces 2a and 2b also functions as a lid, and is formed on the side surface (first side surface) 2c facing the insertion port 4 as shown in FIG. It is attached so as to be rotatable around the rotated shaft 18. Therefore, between the main surface 2a and the side surface 2c, there is formed a gap 17 which functions as a clearance when the main surface 2a rotates and communicates with the inside of the case 2, as shown in FIG. . In addition, as shown in FIG. 2, rectangular notches 5a and 5b are provided at the center of the ends of the main surfaces 2a and 2b on the side of the insertion opening 4 in order to easily grip the MD stored in the case 2. Each is formed. The side surfaces 2d and 2e of the three side surfaces 2c to 2e constitute a second side surface in the present invention.

On the other hand, the strip-shaped film base material 3 for packaging is
In the same manner as the conventional strip-shaped film substrate 53, the case 2
The case 2 is packaged in a state of being adhered to the body 2 on the side surface 2c and side-adhered on the side surfaces 2d and 2e adjacent to the side surface 2c. FIG.
As shown in the figure, the upper end (one end) 3a of each of the ends 3a and 3b of the strip-shaped film base material 3 folded on the side surface 2c of the case 2 at the time of sticking the body, A notch 6 for cutting is formed, and a notch at the lower end (the other end) 3b connected to the end 3a is formed so as to communicate with the notch 6 and to discharge air inside the strip-shaped film base material 3. 7 are formed. In this case, the cuts 6 and 7 are cut along a direction perpendicular to the longitudinal direction of the side surface 2c of the case 2, and the cut 6 is located right above the cut 7 and communicates with each other as shown in FIG. ing. In addition, cut 7
Is cut in a length from the tip of the end 3b of the strip-shaped film base material 3 to the corner of the case 2 so as to face the gap 17 formed between the main surface 2a and the side surface 2c. ing. In the same figure, the notch 7 is located immediately below the notch 6 (on the same straight line). Required, which may increase manufacturing costs. On the other hand, it is possible to discharge air even if the cut 7 is not directly below the cut 6. Further, as described later, in order to discharge air through the cuts 7 and 6, the cut 7 must be located directly below (on the same straight line) or almost directly below (on substantially the same straight line) the cut 6. preferable. Therefore, it is preferable to perform body sticking with the aim of positioning the cut 6 directly above the cut 7, and the cut 7 is not located directly below the cut 6 due to a manufacturing error at the time of sticking the body, that is, the cuts 7, 6. May be displaced from each other in a direction orthogonal to the cutting direction.

Next, a packaging method for automatically packaging the case 2 accommodating the MD by a shrink method will be described.

First, the heat-shrinkable packaging material 9 used in the shrink packaging method will be described with reference to FIG. The heat-shrinkable packaging material 9 is formed of a long strip-shaped heat-shrinkable resin film base material, and in a normal state, is wound around a core material such as a paper tube and formed in a roll shape. The heat-shrinkable wrapping material 9 is printed with a design, a character, or the like for each unit area having a length required to wrap one case, and the longitudinal direction of the heat-shrinkable wrapping material 9. Is formed so as to intersect the boundary line L at each boundary portion of the unit region. In other words, the cut 10 is formed between the portion corresponding to, for example, the end 3a of one of the strip film substrates 3 in the two strip film substrates 3 continuous with the boundary line L interposed therebetween, and the other strip film substrate. 3, for example, is cut integrally with a portion corresponding to the end 3b.

First, as shown in FIG. 4, the heat-shrinkable wrapping material 9 wound in a roll is sequentially unwound. next,
The transported heat-shrinkable wrapping material 9 is conveyed to the vicinity of the case 2, and is sequentially cut at the boundary line L, whereby the strip-shaped film base material 3 is manufactured by dividing into unit regions (cutting). Process). At this time, the cuts 10 are also cut at the same time, and cuts 6 and 7 are formed at both ends of the strip-shaped film substrate 3 (see FIG. 5). Next, FIG.
As shown in (2), the case 2 is pressed substantially at the center of the strip-shaped film substrate 3 so that the insertion opening 4 faces the strip-shaped film substrate 3. Next, after the strip-shaped film substrate 3 is folded in two and the case 2 is sandwiched, as shown in FIG.
The turret 11 is sequentially mounted in the slit 11a. At this time, the strip-shaped film substrate 3 closes the insertion opening 4 and is brought into close contact with each of the main surfaces 2 a and 2 b of the case 2. Thereafter, when rotating together with the turret 11, each end 3b, 3a of the strip-shaped film substrate 3 protruding from the surface of the turret 11 is placed on the side surface 2c of the case 2 by a bending jig and a temporary fixing heater. Are temporarily folded in that order, and are temporarily fixed in a state of being overlapped. Subsequently, when passing through the area of the heater 12, the overlapping portion W of each end 3a, 3b of the strip-shaped film substrate 3 is heated, and the ends 3a, 3b are adhered to each other, so that the body is attached. (See FIG. 3). In this state, as shown in FIG. 7, the case 2 excluding the side surfaces 2d and 2e
All other surfaces are covered with the strip-shaped film substrate 3. After that, the case 2 on which the strip-shaped film base material 3 is attached to the body is sequentially taken out of the turret 11 after passing through the area of the heater 12.

Next, as shown in FIG. 8A, the short-side opening ends of the side surfaces 2d and 2e of the strip-shaped film substrate 3 are folded into the side surfaces 2d and 2e, respectively. As shown in (b) and (c), the open ends on the long sides of the side surfaces 2d and 2e are respectively folded and overlapped with each other.
Next, as shown in FIG. 9, the package 1 in this state is conveyed on a conveyor 13 and passed between a pair of heaters 14.
At this time, the overlapping portion X of the side-applied side of the strip-shaped film substrate 3 on the side surfaces 2d and 2e of the case 2 is heated and adhered (side-applying step). As a result, the case 2 is packaged and sealed with the strip-shaped film substrate 3 by the so-called caramel packaging method. In this state, as shown in FIG. 10A, a slight gap 15 is formed between the surface (main surfaces 2a and 2b) of the case 2 and the strip-shaped film substrate 3.

Next, as shown in FIG. 11, a hot air drying furnace (shrink furnace) in which the inside is heated by a heater 16a while the sealed package 1 is conveyed by a conveyor 13.
Then, the strip-shaped film substrate 3 is heated and contracted by passing through the plate 16 (heat contraction step). In this case,
As shown in FIG. 10B, the main surfaces 2a and 2b of the case 2
The air trapped in the gap 15 between the rectangular film substrate 3 and the rectangular film substrate 3 thermally expands, and at the same time, the rectangular film substrate 3 starts contracting. At this time, the air that has been thermally expanded by being confined in the gap 15 is not only discharged to the outside of the strip-shaped film substrate 3 through the communication path 8 and the cut 6, but also directly to the outside through the cut 7. Since the cut 7 and the cut 6 communicate with each other (since they are located on the same straight line or almost the same straight line), they are discharged outside through the cuts 7 and 6. When the cut 7 is not located directly below the cut 6, the thermally expanded air on the main surface 2a side is discharged through the cut 7, and the thermally expanded air on the main surface 2b side is discharged through the cut 6. Is discharged. Therefore, the thermally expanded air inside the package 1 is reliably discharged to the outside. For this reason, as shown in FIG. 3C, the strip-shaped film substrate 3 comes into close contact with the main surfaces 2a and 2b of the case 2, so that the strip-shaped film substrate 3 is packaged without wrinkles. By the completion of the heat shrinking step, the step of packaging the case 2 by the shrink method is completed, and the package 1 is completed. Next, in the process immediately after this, a plurality of packages 1 are stacked and stored in a decorative box or the like. In this step, the air between the main surfaces 2a and 2b of the package 1 and the strip-shaped film substrate 3 has completely escaped, and no wrinkles have occurred on the main surfaces 2a and 2b.
A predetermined number of packages 1 can be reliably and easily stored in the decorative box.

As described above, according to this shrink wrapping method, at the time of heat shrinkage, the air on the main surface 2a side of the case 2 is mainly discharged outside through the cut 6 and the air on the main surface 2b side is also discharged. Since the air is mainly discharged to the outside through the cut 7, the thermally expanded air in the gap 15 is reliably discharged to the outside. As a result, the strip-shaped film substrate 3 closely adheres to the main surfaces 2 a and 2 b of the case 2 without any gap. I do. Therefore, it is possible to produce a more beautiful package 1 without wrinkles. In addition, according to this packaging method, the conventional small-edge cutter blade in the cutting device used for manufacturing the strip-shaped film substrate 3 only needs to be changed to a longer small-edge cutter blade, so that the packaging equipment and the packaging material can be used. The heat-shrinkable packaging material 9 can be manufactured without increasing the cost. Furthermore, according to the package 1, not only the exterior is beautiful but also the cuts 6 and 7 partially overlap, so that the package of the package 1 is cut off and the case 2 is cut.
At the time of taking out, the notch 7
Also function as a notch for the tear. Therefore,
As a result, the package can be broken on both main surfaces 2a and 2b, so that the case 2 can be quickly taken out.

The present invention is not limited to the above-described embodiment. For example, instead of the slit 7 described above, a very thin and long through hole extending from the side surface 2c to the main surface 2a may be formed in the strip-shaped film substrate 3. According to this aspect, since the opening area is increased, the air is smoothly discharged. In this case, a through-hole is formed in a portion corresponding to the cut 7 in the cut 10 in the heat-shrinkable packaging material 9 wound in a roll shape.

In the above-described embodiment, the air vents such as the cuts 7 and the through holes are formed at the portion facing the gap 17 of the package 1, but the present invention is not limited to this position. For example, it may be formed at a portion facing a joint (joint between components) between the side surfaces 2d and 2e and the main surface 2a of the strip-shaped film substrate 3, or a region E1 shown in FIG. That is, the cut 7A may be formed in a portion facing the opening such as the insertion opening 4 and the cutouts 5a and 5b formed in the case 2. In this case, inside the package 1, the inside of the case 2 and the outside communicate with each other via the opening. For this reason, by making the cuts 7 </ b> A face these portions, as shown in FIG. 12A, the air inside the package 1 including the inside of the case 2 as well as from the surface side of the case 2 is externally blown. As a result, the thermally expanded air can be reliably and smoothly discharged to the outside until the strip-shaped film substrate 3 completes the heat shrinkage.

The air between the strip-shaped film substrate 3 and the case 2 tends to stay between the main surfaces 2a, 2b and the strip-shaped film substrate 3 facing the air. Many wrinkles generated on the film substrate 3 also occur in this portion. Therefore, it is important to minimize the air stagnating between each of the main surfaces 2a and 2b and the strip-shaped film substrate 3 opposed thereto. Therefore, as shown in a package 1A shown in FIG. 13, each main surface 2a,
Cut 7 in region E2 corresponding to the peripheral region in 2b
B and through holes (hereinafter also referred to as “air vents”) may be formed. Here, the peripheral region is, for example, the main surface 2a,
2b is a ring-shaped area extending from each end edge to a portion inwardly corresponding to the thickness of the case 2. In addition, the main surfaces 2a,
When a concave portion is formed in 2b, an air vent can be provided in a portion of the strip-shaped film substrate 3 facing the concave portion. According to these configurations, the main surfaces 2a, 2
The air retained on the b side can be efficiently discharged to the outside via the air vent, and the generation of wrinkles can be effectively prevented. In particular, when the air vent is formed to face the recesses on the main surfaces 2a and 2b, the air vent is not blocked even when the strip-shaped film base material 3 starts to adhere to the main surfaces 2a and 2b due to heat shrinkage. Until the heat shrink is completed,
The thermally expanded air staying in the recess can be reliably discharged. Therefore, the air between each of the main surfaces 2a and 2b and the strip-shaped film substrate 3 at the time when the heat-shrinkage of the strip-shaped film substrate 3 is completed can be completely discharged, so that the generation of wrinkles can be more reliably performed. Can be prevented. In this case, the side surface 2c, the peripheral region of the main surfaces 2a and 2b,
In addition, by forming air vents on portions of the strip-shaped film substrate 3 that are hardly noticeable corresponding to seams between the constituent materials and the like, it is possible to avoid deterioration of the appearance of the package 1.

In the package 1, the cut 7 is formed at a position facing the side surface 2 c of the strip-shaped film substrate 3.
Although the cut is made so as to reach the corner between the side surface 2c and the main surface 2a, the cut 7C may be formed so as to reach the main surface 2a side as in a package 1A shown in FIG. . According to this configuration, as shown in FIG. 12B, when the case 2 has a cylindrical configuration having no gap 17, air on the main surface 2a side is easily discharged through the cut 7C, which is particularly effective. Becomes In addition, the cut 7 can be cut separately from the cut 6 at the end 3 a of the strip-shaped film substrate 3 on the side where the cut 7 is formed.

Furthermore, in the above-described embodiment, the air vents such as the cuts and the through holes are formed in the heat-shrinkable packaging material 9 in advance. An air vent may be provided in the strip-shaped film substrate 3 before being guided to the hot-air drying furnace 16. In particular, the roll-shaped heat-shrinkable packaging material 9 is cut to obtain a strip-shaped film substrate 3.
In the case where a strip-shaped film substrate is used from the beginning instead of forming a film, air bleeding can be provided in an arbitrary step before the packaging in the case 2 is completed. Further, instead of performing body sticking or side sticking with the case 2 wrapped, the case 2 can be stored in a packaging material in which the strip-shaped film base material 3 is formed in a bag shape in advance. In such a case, it is preferable to form air bleeding in a pre-process of forming a bag. For example, when printing a pattern, a character, or the like on the heat-shrinkable film substrate of the raw material, and then cutting the heat-shrinkable packaging material 9 into a belt shape, or applying the heat-shrinkable packaging material 9 to the strip-shaped film substrate 3 By forming air bleeding at the time of cutting, it is possible to collectively perform other cutting in the cutting step, so that the heat-shrinkable packaging material 9 or the strip-shaped film base material 3 can be manufactured efficiently.

In the package 1, the side surface 2c of the case 2
, But not limited to this, the main surfaces 2a,
A configuration in which the body is attached to any one of 2b can be adopted. In this case, the overlapping portion W is located on one of the main surfaces 2a and 2b.

[0035]

As described above, according to the package according to the first aspect and the heat-shrinkable packaging material according to the fifth aspect, the peripheral region on the main surface of the case, the opening formed in the case, and the main surface. By forming a cut or a through hole in the concave portion formed in the portion facing the seam between the constituent materials of the case or the case, when the heat-shrinkable packaging material is thermally shrunk, the cut or the through hole is used. As a result, the air inside the package can be sufficiently discharged. Therefore, the heat-shrinkable packaging material can be brought into close contact with the surface of the case without causing wrinkles, so that a package having a beautiful appearance can be manufactured. In addition, since air does not stay between the surface of the case and the heat-shrinkable packaging material and no wrinkles are generated, when a plurality of packages are stacked and stored in a decorative box or the like in a process immediately after packaging. In addition, it is possible to securely and easily store a preset quantity.

According to the package according to the second or third aspect and the heat-shrinkable packaging material according to the sixth or seventh aspect, the heat-shrinkable packaging is provided at the upper or lower end of the overlapping portion of the body sticking. By forming a second cut separate from the first cut for cutting formed on the upper end of the material,
When the heat-shrinkable packaging material is heated and shrunk, the thermally expanded air inside the package can be reliably discharged through the second cut or the first cut, so that wrinkles are reduced and beautiful. An appearance package can be manufactured. Further, by positioning the overlapping portion of the body sticking on the first side surface, the cuts and the through holes for air discharge become less visible, so that a package with a more beautiful appearance can be manufactured.

According to the package according to the fourth aspect, the thermally expanded air can be directly discharged from the inside of the case through the gap formed in the case and the second cut, so that wrinkles can be further increased. Can be reduced, whereby a package having a more beautiful appearance can be manufactured.

Further, according to the shrink packaging method of the present invention, when the heat-shrinkable packaging material is thermally shrunk, the package is formed through a through hole or a cut formed in the heat-shrinkable packaging material. Since the heat-expanded air inside can be reliably discharged, a package having a beautiful appearance with few wrinkles can be manufactured. Further, since air does not stay between the surface of the case and the heat-shrinkable packaging material and wrinkles are not generated, a plurality of packages packaged by this packaging method are stacked in a process immediately after packaging to form a decorative box or the like. When stored in a storage area, a preset quantity can be stored reliably and easily.

In addition, according to the shrink packaging method of the present invention, when thermally shrinking the heat-shrinkable packaging material, the thermally expanded air between the surface of the case and the heat-shrinkable packaging material is removed. Since the discharge can be reliably performed through the second cut or the first cut, a package having a beautiful appearance with less wrinkles can be manufactured.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a configuration of a package 1 according to an embodiment of the present invention.

FIG. 2 is an external perspective view of a case 2 in the package 1;

FIG. 3 is a sectional view taken along line AA of the package 1 shown in FIG.

FIG. 4 is an external perspective view showing a configuration of a heat-shrinkable packaging material 9 used for the packaging body 1.

FIG. 5 is a perspective view of a state in which the case 2 is pressed against the strip-shaped film base material 3;

FIG. 6 is a side view of a state where the case 2 wrapped by the strip-shaped film base material 3 is inserted into the slit 11a of the turret 11. FIG.

FIG. 7 is a side view of the case 2 in a state where the case is adhered.

FIG. 8 is a side view when the strip film substrate 3 is folded into the side surface 2d of the case 2.

FIG. 9 is an explanatory view (a plan view of the case 2 and the conveyor 13) for explaining a heating bonding step when the strip-shaped film substrate 3 is side-bonded.

10A is a cross-sectional view of the package 1 packaged with the strip-shaped film base material 3 and before the heat shrinking step, FIG. 10B is a cross-sectional view of the package 1 in the heat shrink step, and FIG. FIG. 3 is a cross-sectional view of the package 1 after the heat shrinking step.

FIG. 11 is an explanatory view (a side view of the case 2 and the conveyor 13) for explaining a step of thermally shrinking the strip-shaped film base material 3 in which the case 2 is sealed.

12A is a sectional view taken along line BB of the package 1A in which the cut 7A is formed, and FIG. 12B is a sectional view taken along line CC of the package 1A shown in FIG.

FIG. 13 is an external perspective view of a package 1A according to another embodiment.

FIG. 14 is an external perspective view of a conventional package 51.

FIG. 15 is a sectional view taken along line DD of the packaging body 51 shown in FIG.

16A and 16B are views for explaining a conventional packaging method, in which FIG. 16A is a cross-sectional view of a package 51 after a body sticking step,
(B) is a cross-sectional view of the package 51 in the heat shrinking step,
(C) is sectional drawing of the package body 51 after a heat shrink process.

[Explanation of symbols]

 1, 1A Package 2 Case 2a, 2b Main surface 2c-2d Side 3 Strip film base 3a, 3b End 5a, 5b Notch 6,7,7A-7C, 10 Cut 9 Heat shrinkable packaging material 17 Gap W Overlapping part of body pasting X Overlapping part of side pasting

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E051 AA03 AB02 AB05 AB07 BA02 CA01 CB02 CB03 EA10 FB03 FB07 FC01 FD02 HA02 HA09 HB02 HE01 JA06 JA08 3E067 AA13 AB38 BA05B BA18C BB14C CA01 EA06 EB07 EC28 FB01 GB01

Claims (11)

[Claims] 1. A package having a flat rectangular parallelepiped case in which an object to be stored is stored, wherein the entire surface of the case is shrink-wrapped with a heat-shrinkable packaging material, wherein the heat-shrinkable packaging material is a main body of the case. Heat shrinks the air inside the package body to a peripheral region of the surface, an opening formed in the case, a concave portion formed in the main surface, or a portion facing a seam between components constituting the case. A package characterized in that a notch or a through hole which can be discharged sometimes is formed. 2. A flat rectangular parallelepiped case accommodating an object to be accommodated, wherein two main surfaces and two side surfaces of the case are covered with a heat-shrinkable packaging material, and the case is attached to the body and the other case is attached. A package in which the entire surface is shrink-wrapped in a state where the two sides are attached to each other, and a first cut for tearing is formed at an upper end of the heat-shrinkable packaging material at an overlapping portion of the body attachment. The heat-shrinkable wrapping material has a second notch at the upper end or the lower end of the overlapping portion of the body pasting, which is capable of discharging air inside the wrapping body at the time of heat shrinkage. Is formed separately from the first cut. 3. The package according to claim 2, wherein the package is shrink-wrapped so that an overlapping portion of the body sticking is located on a first side surface of the case. 4. A gap communicating with the inside of the case is formed along the first side surface between the first side surface and the main surface of the case, and the second cut is formed by: The package according to claim 3, wherein the package is cut to a position facing the gap. 5. A heat shrink for shrink wrapping, which is formed of a belt-shaped heat-shrinkable film base material, cut into strips, and heat-shrinked while covering the entire case of a flat rectangular parallelepiped in which an object to be housed is accommodated. A packaging material, which is opposed to a peripheral region on the main surface of the case, an opening formed in the case, a concave portion formed in the main surface, or a seam between components constituting the case. A heat-shrinkable packaging material, wherein a notch or a through-hole capable of discharging air inside the package covered with the heat-shrinkable packaging material at the time of heat shrinkage is formed at a site. 6. A state in which a strip-shaped heat-shrinkable film base material is formed and cut into a strip-shaped film base material, and the first surface of the packaged body is attached to the first surface of the packaged object. A heat-shrinkable packaging material for shrink packaging which is side-attached on two other second surfaces which are orthogonal to each other and are heat-shrinkable in a state of covering the entire surface of the object to be packaged. Is formed at a portion corresponding to one end of the overlapping portion of the body pasting, and air inside the package covered with the heat-shrinkable packaging material can be discharged at the time of heat shrinkage. Wherein the second cut is formed at a portion corresponding to the other end of the overlapping portion of the body pasting so as to be located on substantially the same straight line as the first cut. Shrinkable packaging material. 7. The first and second cuts are formed by a portion corresponding to one end of one of two continuous strip-shaped film substrates in an uncut state, and the other strip-shaped film. The heat-shrinkable packaging material according to claim 6, wherein the heat-shrinkable packaging material is cut integrally with a portion of the base material corresponding to the other end. 8. A band-shaped heat having a cut or through hole formed therein for allowing air inside the package covering the case to be discharged at the time of heat shrinkage when shrink-wrapping the entire surface of the flat rectangular parallelepiped case accommodating the object to be stored. A cutting step of cutting the shrinkable film substrate into strip-shaped film substrates, and forming a peripheral region on the main surface of the case, an opening formed in the case, a concave portion formed in the main surface, or the case. A body sticking step of sticking the strip film to the case such that the cuts or the through holes face the joints of the constituent materials to be joined, and a side sticking side sticking the strip film to the case. And a heat shrinking step of heating and shrinking the strip-shaped film by heating, thereby packaging the case. Packaging method. 9. A notch or through hole through which air inside the package covering the case can be discharged at the time of thermal contraction when shrink-wrapping the entire surface of the flat rectangular parallelepiped case containing the object to be stored is provided on the main surface of the case. Forming a strip-shaped film base material facing a peripheral region, an opening formed in the case, a concave portion formed in the main surface, or a joint of components constituting the case. And a body sticking step of sticking the strip film to the case so that the cut or the through hole faces the site; a side sticking step of sticking the strip film to the case side; and By performing a heat shrink step of heat shrinking the strip film,
A packaging method using a shrink method, wherein the case is packaged. 10. The shrink packaging according to claim 9, wherein a cutting step of cutting the strip-shaped heat-shrinkable film base material into a strip-shaped film base material is performed prior to the forming step. Method. 11. A packaging method for shrink wrapping a flat rectangular parallelepiped case containing a storage object using a heat-shrinkable wrapping material for shrink wrapping, wherein the heat-shrinkable wrapping material is a strip-shaped heat-shrinkable material. In the state of being formed of a conductive film base and being cut into strip-shaped film bases, the two second bases which are attached to the first side of the case and which are orthogonal to the first side and opposed to each other are provided. A packaging material that is side-applied on the side surface of the body and heat-shrinked in that state, wherein a first cut for tearing is formed at a portion corresponding to one end of the overlapping portion of the body application, and When shrink wrapping, the body is attached so that a second cut capable of discharging air inside the package covered with the wrapping material at the time of heat shrinkage is located on substantially the same straight line as the first cut. A cutting step of cutting the strip-shaped heat-shrinkable film base material and processing the strip-shaped film base material on the premise that a packaging material formed at a portion corresponding to the other end of the overlapping portion is used; And a body sticking step of sticking the strip film to the case such that the other end faces the first side surface and the one end overlaps the surface side of the other end. By performing a side sticking step of sticking the strip film to the case side and a heat shrinking step of heating and shrinking the strip film by heat, thereby packing the case. Packaging method.