JP4106783B2 - Package - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention is a packaging that applies shrink wrapping technology to solid objects having a certain shape such as gas combustion equipment or electrical equipment.To the bodyRelated.
[0002]
[Prior art]
  2. Description of the Related Art Conventionally, as a package having such a solid object as a package, a combination of a cushioning material made of polystyrene foam (polystyrene foam) and a rectangular packaging box made of cardboard is known. In this case, a cushioning material formed so as to have an inner surface shape corresponding to the outer surface shape of the packaged object and an outer surface shape corresponding to the inner surface shape of the packaging box is prepared, and the cushioning material is used as the packaged material. Are housed in the packaging box in a state of being externally fitted.
[0003]
  On the other hand, in such a package, since the packing box covers the entire outer surface of the packaged item, a large amount of waste is generated after the packaged item is unpacked, and overpacking may occur. Become. For this reason, for example, simple packaging as shown in FIG. 14 is also used as a package from the viewpoint of reducing waste and saving resources. This is because the corrugated packaging trays 103, 103 in a state in which the cushioning materials 102, 102,... Are interposed between the upper end portion and the lower end portion of the package object 101 are fitted between the upper and lower ends of the package object 101. In this state, the wrapping cords 104, 104 such as PP bands (polypropylene bands) are stretched around the outer periphery of the packing trays 103, 103 and fastened. The package 101 and both packing trays 103 and 103 are bundled together. In this case, since the intermediate part of the article to be packaged 101 is exposed, the article to be packaged 101 is made of an extremely thin (for example, 15 μm thick) polyethylene film bag (hereinafter referred to as “thickness 15 μm”) from the viewpoint of ensuring dustproof and dripproof properties. (Abbreviated as “polybag”) 105 is covered so that the whole is covered, and the packaging tray is externally fitted from the outside of the bag in this state.
[0004]
[Problems to be solved by the invention]
  However, in the case of simple packaging in which the above-mentioned semi-wrapped products are bundled with PP bands, the product packaging line, etc. can be held sideways (slightly moved), stored, and loaded and loaded during transportation by a transportation vehicle. In the lowering operation, the operator tends to carry the package by placing a hand on the PP band. In this case, as a result of the self-weight of the article to be packaged acting locally on the cardboard packaging tray or the cushioning material via the PP band, the packaging tray may have a dent or a cushioning material. As a result, the PP band, which was initially in a tight state, will have a play and will appear loose. For this reason, the appearance of the packaged product as a product is deteriorated, and the PP band may be detached from the semi-wrapped packaging tray. On the other hand, if the packaged item is a relatively heavy item (for example, a 10 to 25 kg item), some clue is necessary for the transportation and movement of the packaged item by the operator.
[0005]
  In addition, the middle part of the packaged goods located between the upper and lower packaging trays is only stored in an ultra-thin plastic bag and is not protected by cushioning materials. May cause scratches or dents on the outer surface of the package.
[0006]
  Furthermore, the packaged item is stored in a plastic bag for protecting the surface of the packaged item, but there is no problem as long as the weight of the packaged item is light enough to be easily handled by the operator. However, if the packaged item becomes a heavy item that is somewhat difficult (for example, about 10 to 25 kg) by a single worker, it takes a lot of labor to load the plastic bag.
[0007]
  The present inventionNoThe purpose of this is to improve the protection of the packaged items and facilitate the packaging operation while ensuring good handling even for relatively heavy items. The object is to provide a package.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, according to the present invention, a protective member is externally fitted to both ends of a packaged object, and the peripheral end of the protective member is in a protruding state projecting a predetermined amount from the outer periphery of the packaged object. In this state, both the protective members and the protective members are covered with a heat-shrinkable film for shrink wrapping.
[0009]
  Specifically, in the first invention, as a package, the outer periphery is fitted to each end on one side of the package in one direction, and the peripheral edge is in the one direction over the entire periphery rather than the peripheral edge constituting each end. A pair of protective members projecting in orthogonal directionsA binding string that spans and binds the pair of protective members so as to press against the packaged items,A heat-shrinkable bag-like film covering the whole of the packaged object in a sealed state with a pair of protective members;To do. The binding string is set stronger than the bag-like film as its tensile strength, and is stretched between the pair of protective members in a tension state, and the bag-like film is passed through the pair of protective members and the packaged material. The entire strap is covered with the binding string. AndThe bag-like film is heat-shrinked and brought into close contact with the outer surfaces of the two protective members, thereby holding the pair of protective members and the packaged object together.In addition, in the state after heat shrinkage, the intermediate portion of the packaged article located between the two protective members and the intermediate portion of the film after heat shrinkage located opposite to each other outside the intermediate portion are separated from each other. On the other hand, the intermediate portion of the film after the heat shrinkage was stretched in the tensioned state even when the middle portion of the film to be wrapped tends to be sucked to the side of the intermediate portion of the package by the heat shrinkage. A structure in which the gap between the intermediate portion of the article to be wrapped and the intermediate portion of the film after the heat shrinkage is wider than the case where the binding string is not present, being blocked by the binding string;To do.
[0010]
  Further, the second invention is based on the premise that the outer surface of the package is covered with a heat-shrinkable film as the package. A pair of protective members that are fitted and protruded in a direction perpendicular to the one direction over the entire periphery rather than the periphery that constitutes each end.A binding string that spans and binds the pair of protective members so as to press against the packaged items,A pair of protective members and the outer periphery of the packageCover with both ends open.With heat-shrinkable tubular filmTo do. The binding string is set stronger than the cylindrical film as its tensile strength, and is stretched between the pair of protective members in a tension state, and the cylindrical film is connected to the pair of protective members and the packaged object. The entire strap is covered with the binding string. AndThe cylindrical film is heat-shrinked and brought into close contact with the outer surfaces of the two protective members, thereby holding the pair of protective members and the packaged object together.In addition, in the state after heat shrinkage, the intermediate portion of the packaged article located between the two protective members and the intermediate portion of the film after heat shrinkage located opposite to each other outside the intermediate portion are separated from each other. On the other hand, the intermediate portion of the film after the heat shrinkage was stretched in the tensioned state even when the middle portion of the film to be wrapped tends to be sucked to the side of the intermediate portion of the package by the heat shrinkage. A configuration in which the gap between the intermediate portion of the article to be packaged and the intermediate portion of the film after the heat shrinkage is wider than the case where the binding string does not exist, being blocked by the binding string.It is what.
[0011]
(Delete)
[0012]
  Here, the “packaged object” can be applied to any solid object having a certain shape when the present invention is applied, but is relatively heavy (for example, about 10 to 25 kg). And it is suitable to be applied to products and products that require surface protectionNothingIt becomes. Specifically, for example, a gas combustion device such as a water heater or a device housed in a metal casing such as an electric device can be used. The shape is not limited.
[0013]
  The “heat-shrinkable film” is not particularly limited as long as it exhibits shrinkability by heating or cooling after heating, and preferably has flexibility even after heat shrinkage. For example, a film mainly composed of polyolefin is mentioned, and more specifically, a laminated film in which one kind of single layer or plural kinds of low density polyethylene, polypropylene, ethylene / vinyl acetate copolymer, etc. are laminated. Or the film which consists of these resin compositions is mentioned. The film may be opaque, but is preferably translucent or transparent so that the contents to be packaged can be visually confirmed. And when adopting a "bag-like" shape before heat shrinking of this film, the three edges that are opened after covering the periphery of the package with a sheet-like film material are heat-sealed. What is necessary is just to heat-seal and seal. In the case of adopting a “tubular” one, similarly, after covering the periphery of the object to be packaged with a sheet-like film material, only one edge is thermally welded in the same manner as described above, and both ends are opened. It can be made into a shape.
[0014]
  The “protective member” has a buffering function of protecting the package by elastically deforming, plastically deforming or elastic-plastically deforming by holding an external force and receiving an external force. Generally, it is constituted by a molded product. In addition, paper-based cushioning material that is compression-molded so that used paper or pulp has a predetermined compressive strength may be used, and even if it is used for incineration after use, the atmospheric environment compared to using polystyrene foam Can prevent adverse effects on Further, in addition to the cushioning material such as the above-mentioned foamed polystyrene or paper-based cushioning material, a “protective member” is configured by combining an exterior material made of paper or plastic cardboard material formed so as to cover them. preferable. In this case, the amount of use of the cushioning material itself can be reduced by making the cushioning material a small piece that protects only necessary parts such as corners of the package.
[0015]
  In the case of the first or second invention described above, the protective members at both ends of the article to be packaged are sufficient without covering the entire article to be packaged, so that the protective member can be reduced and resources can be saved. . On the premise of this, since shrink wrapping is performed with a bag-like or cylindrical heat-shrinkable film, it is possible to omit a conventional charging operation into a plastic bag, and labor saving of the packaging operation is achieved. Moreover, since the whole package is covered with the protective member and the film, the dustproof property and the dripproof property can be ensured. In addition, since the protective member that has been exposed to the outside is also covered with the film in the past, it is possible to prevent the protective member from being sagged or deteriorated due to getting wet in the rain. Thereby, the reliability with respect to packaging quality is improved. Moreover, while the film itself after heat shrinkage has flexibility, the peripheral edge of the protective member protrudes outward from the peripheral edges of both ends of the packaged object, In a state where both the protective members are arranged in the vertical position, the packaged item can be easily transported and moved by placing a hand on the lower side of the side surface of the upper protective member from the outside of the film. That is, both the protective member and the package are integrally held by the film after heat shrinkage, and the own weight of the package itself is supported by the film connecting the two protective members. In addition, since the outer surface of the intermediate portion of the packaged object that is between the two protective members and is not covered by the protective member is also covered with the film, and the film is in a state of being stretched by heat shrinkage. Even if a slight collision or the like of an object from the outside occurs, it is possible to prevent generation of scratches, dents and the like in the packaged object at the intermediate portion.
[0016]
  From the viewpoint of the protection of the packaged goodsEtThe first or second invention described aboveThenThe gap between the inner surface of the film after heat shrinkage spanned between the protective members and the outer surface of the intermediate portion of the packaged object is separated from each other.ButIn the formed stateTo be.In the case of the first or second invention,Even if the above-mentioned collision or the like occurs, the margin of deformation corresponding to the gap is ensured in the film, and it is possible to achieve a more reliable improvement of protection such as prevention of scratches and dents in the intermediate part. Become.
[0017]
  Note thatFrom the viewpoint of handling the package, in the first or second invention, the film has a tensile strength in a direction connecting at least both ends of the package with a value equal to or greater than the weight of the package. It is preferable to set to. This ensures that the weight of the packaged item is reliably supported by the film even when the packaged item is a heavy item in the case where the lower end of the upper protective member is carried and transported as described above. Work such as transportation can be performed reliably. For example, when using a low-density polyethylene film material as the film, if the instantaneous water heater with its own weight of 20 kg is used as the package, it is sufficient to expect a safety factor if the film thickness before heat shrinkage is about 80 μm or more. The above-mentioned packaged items can be supported.
[0018]
  orFrom the viewpoint of handling the packaged object, the first or second invention described aboveThenBefore covering the film, the protective members are bound to each other by a binding string such as a PP band so as to press the protective member against the package, and in this state, the film is covered and thermally contracted.is doing.In the case of the first or second invention,In the operation of covering the film, the protective member and the package are not separated from each other, and the relative movement of both is reliably prevented, so that the operation of covering the film can be easily and reliably performed. become. Moreover, even when the packaged item is transported with the lower end portion of the upper protective member as described above, the weight of the packaged item is supported by the binding string in addition to the film, so that the work such as transporting is performed by the operator. Psychologically, it can be done more reliably with a sense of security. At this time, the film thickness of the film can be reduced by an amount corresponding to the load resistance of the binding string, and the film material itself and the cost can be reduced. In addition, since the above-described tying string is stretched between the two protective members, that is, stretched in a straight line, the film located on the outside of the tying string is heat-shrinked and becomes a bow on the intermediate part side of the package. Even if it tries to dent, it will be limited by the above-mentioned binding string. For this reason, the gap between the intermediate part of the package and the film is wider than when there is no cable tie, and the protection and buffer functions against collisions with other objects from the outside are further improved. Is possible. Furthermore, even after the film of the finished package has been peeled off, the package and both protective members are held together by the binding string, so that the transport work and the heat-shrinkable film for the return The re-shrink wrapping operation using can be performed easily and quickly.
[0019]
  At this time, in the second invention, the window formed by thermally shrinking the tubular film is positioned at the protective members at both ends, and the above-described binding string faces the window and is exposed to the outside. By doing so, when carrying the object to be wrapped for a short distance such as sideways, the work can be easily performed by grasping the binding string exposed from the window portion. Of course, when grasping the binding string, it is necessary to wear work gloves such as work gloves from the viewpoint of the safety work of the operator.
[0020]
  In additionIn the first invention or the second invention, the handling of the packaged article or the like is carried out by forming a handle for carrying in the vicinity of each side surface of the upper protection member, preferably at the lower end position. It becomes possible to improve the sex dramatically. As the handle portion, a handle hole may be formed in the protection member, or a notch portion that opens downward may be formed at the lower end edge of the protection member. In this case, the film facing the hand hole or the notch may be broken by hand or the hand may be inserted using the flexibility of the film. Moreover, as another handle part, you may make it form the bag-shaped recessed part opened to the outer side by denting the film itself in the said position by thermal deformation. In this case, if the film at a specific position is heat-shrinked in a state where it is partially pressed against the packaged object as in the third aspect of the invention, the bag-like recess can be easily used as a handle. It becomes possible to form. In order to make this pressed state, the film portion may be pushed in using a pressing die, and hot air is blown locally on the film portion using a blowing nozzle or the like instead of the pressing die. Also good. By forming such a recess in the film, it is possible to easily carry a packaged object with the lower edge of the protective member by inserting the hand inward without breaking through the film as described above. become.
[0021]
【The invention's effect】
  As explained above, the firstOrAccording to the packaging body in the second invention, it is possible to improve the protection of the packaged object and facilitate the packaging operation while ensuring good handling even for a relatively heavy object.
[0022]
  That is, it is possible to achieve protection by ensuring dustproofness and dripproofness including the protective member, and it is possible to improve the reliability of the packaging quality. In addition, by allowing the film to bear a load equivalent to the weight of the packaged item, the packaged item can be easily transported and moved by placing a hand on the protective member from the outside of the film. The effect on the handleability can be greatly increased by forming the handle portion. On top of that, a gap is formed between the heat-shrinked film and the intermediate part of the package.BecauseThus, it is possible to increase the buffering function and the protection function for the packaged object.
[0023]
  In addition, the film is covered and heat-shrinked in a state where both the protective member and the package are bound together by a binding string.BecauseTo facilitate the work of covering the film, to facilitate the work in carrying, to ensure the support of the package, and to further improve the buffer function and the protection function based on the existence of the gap CanThe In particular, even if the film is heat-shrinked and tries to dent in the middle part of the package, it is limited by the binding string, so there is a gap between the middle part of the package and the film. Compared to the case where there is no cable tie, the protection function and buffer function against collision with other objects from the outside can be further improved.
[0024]
(Delete)
[0025]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0026]
<FirstreferenceForm>
  FIG. 1 shows the first of the present invention.referenceThe packaging body which concerns on a form is shown, 1 is a product as a to-be-packaged object, 2 and 2 are each a protection tray as a protection member, and 3 is a film which has heat shrinkability. Hereinafter, the upper and lower sides of each drawing will be described as the upper and lower sides of the package and the package. Moreover, the film 3 shown in each figure exaggerates the thickness on the relationship of illustration.
[0027]
  The product 1 is an instantaneous water heater, and is housed in a metal casing 1a having a predetermined thickness and being vertically long as shown in FIG. In the figure, reference numeral 1b denotes a front cover of the casing 1a. The front cover 1b is integrated with the casing 1a by screws or the like.
[0028]
  As shown in FIG. 3 in addition to FIG. 2, each protection tray 2 is configured by combining buffer materials 21 and 21 and an exterior material 22 with each other. Each buffer material 21 includes a bottom wall portion and a peripheral side wall portion, and an inner surface shape that matches the outer surface shape of the upper end portion or the lower end portion of the product 1 by foamed polystyrene molding, and an outer surface shape that matches the inner surface shape of the exterior material It is formed to have. In particular, the part that adheres to the outer surface of the corner of the product 1 is thick (for example, about 50 mm) to protect the product 1 and the peripheral edge of each protection tray 2 protrudes from the side surface of the product 1 by a predetermined amount. Has been. Further, the exterior material 22 is formed in a box shape in which only one side is opened by corrugated cardboard having a predetermined thickness. Then, the cushioning materials 21 and 21 are fitted inside the exterior material 22 to form the protective tray 2, and the protective tray 2 is externally fitted to the upper end portion and the lower end portion of the product 1 to be in a semi-wrapped state. The In this semi-wrapped state, the upper and lower intermediate portion 1c (see FIGS. 1 and 3) of the product 1 located between the protective trays 2 and 2 is exposed. In addition, said buffer material 21 is a bookreferenceIn the embodiment, a two-divided one is shown, but the present invention is not limited to this.
[0029]
  The film 3 is formed in a bag shape before heat shrinkage, and is in a state of covering the whole of the above half-wrapped state, that is, all six sides and hermetically sealed inside. And this film 3 is heat-shrinked, it adheres to the outer surface of both the protection trays 2 and 2 of the said semi-wrapping state (refer FIG. 1, FIG. 3), and the up-and-down intermediate part 31 between both protection trays 2 and 2 exists. It is sucked into the product 1 and is in a state of tension like a bow. At that time, the inner surface of the upper and lower intermediate portion 31 is not in contact with the outer surface of the intermediate portion 1c of the product 1 so that a gap S (shown only in FIG. 3) remains between them. The material and film thickness of the film 3 are selected so that the allowable tensile load of the upper and lower intermediate portions 31 of the film 3 is larger than the weight of the product 1 in consideration of the weight of the product 1 in particular. At that time, a safety factor of a predetermined value is expected. Specific examples of the material and film thickness with respect to the self-weight value are as described above.
[0030]
  Next, a packaging method using the film 3 will be described with reference to FIG. 4. As a pre-process, the sheet-like film materials 4 and 4 are opposed to each other from the upper and lower sides from two rolls installed on the upper and lower sides. The both end edges that have been extended and overlapped are thermally welded by the horizontal heat seal device 5. The horizontal heat sealing device 5 is composed of an upper movable type movable in the vertical direction and a lower fixed type, and heat welding is performed at two locations on the front and rear sides along the packaging line, and at the same time, two locations are thermally welded. The overlapped film material is cut at the center position of the part, and then the movable mold is retracted upward.
[0031]
  In the first step, the semi-wrapped product M in which the protective trays 2 and 2 are externally fitted to the product 1 is transported to the thermally welded film materials 4 and 4 by transport means such as a roller conveyor (not shown), and the film While the materials 4 and 4 are being wound, the transverse heat seal device 5 is passed. Then, after passing, the upper and lower film materials 4 and 4 wound up to the back of the semi-wrapped product M are sandwiched between the movable mold and the fixed mold which are moved downward, and simultaneously heat-welded and cut. Thereby, the semi-wrapped product M will be in the state covered with the cylindrical film 3a opened to both right and left sides. 4, reference numerals 30, 30,... Denote linear welds.
[0032]
  In the second step, both side openings of the tubular film 3a are thermally welded by the longitudinal heat seal devices 6 and 6 respectively disposed on the left and right sides and simultaneously cut. In addition, although illustration of a part structure is abbreviate | omitted for this each vertical heat seal apparatus 6, it has the same structure only in a different direction from the said horizontal heat seal apparatus 5. FIG. As a result, the semi-wrapped product M is entirely covered with the bag-like film 3b and sealed.
[0033]
  In the third step, the semi-wrapped product M covered with the bag-like film 3b is put into the shrink tunnel 7 and heated for a predetermined time in the passing process, and then taken out to the external space. The shrink tunnel 7 is a heating environment in which hot air from a fan heater (not shown) is blown into the interior and the internal atmosphere is at a predetermined temperature (for example, 150 ° C.). Here, for example, when a low-density polyethylene film material having a thickness of 80 μm is used, heating may be performed at a temperature condition of 150 ° C. for about 20 seconds. Although not shown in the drawing, the entrance and exit of the shrink tunnel 7 are provided with a banner or an open / close shutter to keep the heating environment constant.
[0034]
  Finally, as a fourth step, the film 3b is cooled by natural air cooling or accelerated cooling such as blowing by the fan 8 from the shrink tunnel 7. As a result, the film 3b shrinks to become a film 3 after heat shrinkage as shown in FIG. 1 or FIG.
[0035]
  And the three-sided (three places) thermal welding is repeated about the half package M to which each above process is conveyed sequentially, and a package is completed in order.
[0036]
<SecondreferenceForm>
  Figure 5 shows the secondreferenceShowing the form of the package, this secondreferenceThe form uses a cylindrical thing as the heat-shrinkable film 3. This secondreferenceThe other configuration of the form is the firstreferenceSince it is similar to the form, the firstreferenceFor the same components as the form, the firstreferenceThe same reference numerals as those of the embodiment are attached and detailed description thereof is omitted.
[0037]
  Hereinafter, the packaging body of FIG. 5 will be described while explaining the packaging method based on FIG. 6.
[0038]
  This secondreferenceIn the form, as a pre-process, both the front edges of the sheet-like film materials 4 and 4 extended from the rolls installed on the left and right sides of the packaging line so as to oppose each other from the left and right are heated by the vertical heat seal device 9. Weld. The vertical heat seal device 9 is composed of a pair of movable types that move in the left-right direction to open and close, and at the central position of the two heat-welded portions at the same time as heat-welding at two locations on the front and rear sides along the packaging line. The superimposed film material is cut, and then both the movable molds are opened to the left and right to be retracted.
[0039]
  In the first step, the semi-wrapped product M is transported to the thermally welded film materials 4 and 4 by transport means such as a roller conveyor (not shown), and the vertical heat seal device 9 is installed while the film materials 4 and 4 are rolled up. Let it pass. Then, after passing, the left and right film materials 4 and 4 wound up to the back of the semi-wrapped product M are sandwiched between a pair of movable molds and thermally welded, and simultaneously cut. Thereby, the semi-wrapped product M is in a state of being covered with the cylindrical film 3c that opens on both the upper and lower sides, and the end surface 22a of each protective tray 2 is in a state of facing the opening of the film 3c.
[0040]
  Then, in the second step, the semi-wrapped product M covered with the bag-like film 3c is put into the shrink tunnel 7, and the firstreferenceAs in the third step of the embodiment, after heating for a predetermined time in the passage process, it is taken out to the external space. Here, for example, when a low-density polyethylene film material of 80 μm is used,referenceSimilar to the embodiment, heating may be performed at a temperature condition of 150 ° C. for about 20 seconds.
[0041]
  Finally, as a third step, the film 3c is cooled by natural air cooling or accelerated cooling such as blowing by the fan 8 from the shrink tunnel 7 or the like. As a result, the film 3c shrinks to become a film 3 after heat shrinkage as shown in FIG. One half (one place) of thermal welding is repeated for the semi-packaged product M to which the above steps are sequentially conveyed, and the package is completed in sequence.
[0042]
  And when each opening part of the cylindrical film 3c heat-shrinks, as shown in FIG. 5, the film part around the opening part will closely_contact | adhere to the end surface 22a of each protection tray 2, and the window part 32 will be formed. .
[0043]
  This secondreferenceIn the case of the form, although the upper surface of the protective tray 2 is exposed only in the portion of the window portion 32, the other portions of the protective tray 2 and the product 1 are all covered with the film 3, and the firstreferenceThe same action and effect as the form can be obtained. In addition, this secondreferenceIn the embodiment, since the tubular film 3c (see FIG. 6) remains as it is, the first shrinkage is performed.referenceCompared to the case of the embodiment, it is possible to reduce the film material to be used and the heat welding work.
[0044]
  The above secondreferenceIn the case of the form, the window portion 32 is positioned on the end face 22a of each protection tray 2, but the window portion 32 is positioned on the side surface of the article 1 as shown in FIG. You may do it. Even in this case, although it is somewhat inferior in terms of dust resistance, other actions and effects can be obtained in the same manner as in other forms.
[0045]
<FruitEmbodiment>
  8 and 9 areAccording to the present inventionShow the embodiment, thisFruitForm is secondreferenceA PP band 9, 9 is added as a binding string for binding the protective trays 2, 2 and the product 1 to each other, and the PP band 9, 9 is arranged at a specific position. It is. In the present embodiment as well, the firstreferenceFor the same components as the form,referenceThe same reference numerals as those of the embodiment are attached and detailed description thereof is omitted (the following description is omitted).Each shapeThe same about the state).
[0046]
  The packaging procedure in the present embodiment is such that first, two or more (two in the illustrated example) are provided on the outer periphery in the vertical direction in a state where the two protection trays 2 and 2 are externally fitted to the product 1. The PP bands 9 and 9 are stretched, and both ends are welded together. At this time, the binding position of each PP band 9 is set to a position slightly closer to the center of each protection tray 2. That is, the position is set so that each PP band 9 is exposed from the window 32 described later. Next, the product in this state is covered with a tubular film 3c by a process similar to the second reference embodiment (see FIG. 6) as a semi-packaged product M, heated in the shrink tunnel 7, and then cooled.
[0047]
  Thereby, the said cylindrical film 3c heat-shrinks and it closely_contact | adheres to each protection tray 2 in the state in which the window part 32 was formed on the end surface 22a of each protection tray 2. FIG. In this state after heat shrinkage, even if the intermediate part 31 of the film 3 located outside the intermediate part 1c of the product 1 tends to be sucked in a bow toward the product 1 side by heat shrinkage, it is straight in the tension state. It will be blocked by both PP bands 9 and 9 that are stretched over. For this reason, the distance between the intermediate part 1c and the intermediate part 31, that is, the width of the gap S is larger than in the case of the first or second reference form. The protection function / buffer function for the product 1 can be further increased. At this time, since the tensile strength of the PP band 9 is much stronger than that of the film 3, even if the PP band 9 is bent due to the heat shrinkage force of the film 3, the amount of bending is slight. Can be suppressed.
[0048]
  In addition, since both PP bands 9 and 9 are exposed to the outside from the respective window portions 32, the PP bands 9 and 9 at the position of the window portion 32 at the time of slight movement work in the factory, during transportation, on-site, etc. If the hand is touched, the entire package including the product 1 can be easily carried. As described above, when hands are put on the PP bands 9, 9, it is assumed that work gloves such as work gloves are worn.
[0049]
<No.3 ReferenceForm>
  FIG.3 ReferenceThis form shows3 ReferenceThe form is intended to reduce the film material used while maintaining the minimum packaging function.
[0050]
  BookreferenceIn the embodiment, a protective tray 2a having a chamfered portion 23 formed on the outer surface of each corner is used. The chamfered portions 23 are first to first.2 Reference form orFormed by obliquely cutting each corner portion at the intersection of two ridge angles at the four corners of each end surface 22a of the protection tray 2 used in the embodiment and one ridge angle extending in the vertical direction over a predetermined range of claims. It is.
[0051]
  And what put the above-mentioned protection tray 2a on the both ends of the product 1 respectively as a semi-packaged product M is the second.referenceThe tubular film 3c is covered by the same process as the embodiment (see FIG. 6), heated in the shrink tunnel 7, and then cooled. At this time, the vertical width dimensions of the sheet-like film materials 4 and 4 are the same as the height in the vertical direction between the protective trays 2a and 2a of the semi-wrapped product M, or slightly higher on each of the upper and lower sides. It is set to the dimension which added every dimension (for example, about 10-50 mm). That is, when heat shrinking, the winding allowance to be brought into close contact with the end face 22a of each protection tray 2a is set to zero or a slight size (10 to 50 mm in the above example).
[0052]
  In this case, even if the tubular film 3c is thermally shrunk in the vertical direction, each edge 33 in the vertical direction of the film 3 after heat shrinking is in close contact with each of the four chamfered portions 23, 23,. The tray 2a is prevented from falling off from the end face 22a. 1st-1st without each said chamfer 232 Reference form orIn the case of the protection tray 2 of the embodiment, the circumferential length in the planar direction is the same as the circumferential length of the end surface 22a in the vertical direction, and the resistance to the heat shrinkage force in the vertical direction of the film does not act so much, The mode is left to the original shrinkage of the film. In contrast, the bookreferenceIn the case of the embodiment, due to the presence of each of the chamfered portions 23, the circumferential length gradually increases in the vertical direction from the position of the end surface 22a (starting position of the chamfered portion) to the end position of each of the chamfered portions 23. Will do. For this reason, the depressing force (resistance force) against the heat shrinkage force in the vertical direction of the film 3 acts, so that each edge 33 of the film 3 after the heat shrinkage is zero even if the winding allowance is zero or a slight size. It is considered that the chamfered portions 23 are brought into close contact with each other and stopped.
[0053]
  BookreferenceIn the case of the form, the amount of the film material 4 to be used can be reduced as much as possible, and the film thickness and the like of the film material 4 are the first.referenceAs illustrated in the form, by setting the product 1 so as to have a load bearing strength equivalent to or higher than its own weight, if the lower end portion of the upper protection tray 2a is handled, the entire package can be easily carried.
[0054]
<No.4 ReferenceForm>
  FIG.4 ReferenceShow the form4 ReferenceForm is firstreferenceThe handle 34 is formed in the form.
[0055]
  As shown in FIG. 12, the handle portion 34 is formed by recessing the film 3 itself toward the product 1 on the lower side of the left and right side surfaces of the protective tray 2 (only one side is shown in FIGS. 11 and 12). This is a bottomed bag-like recess that opens outward.
[0056]
  In order to form such a handle portion 34, the pressing die 10a of the pressing die device 10 is pressed against the heated film 3 immediately after passing through the shrink tunnel (see FIG. 4) and exposed to the outside. It may be generated along the shape of the pressing die 10a. And if the said pressing die 10a is retracted after cooling, said handle part 34 will be formed.
[0057]
  The pressing die device 10 includes a pressing die 10a having an outer surface shape substantially corresponding to the inner surface shape of the concave portion, and an actuator 10b such as a cylinder for moving the pressing die 10a forward and backward with respect to the film 3. .
[0058]
  Book number4 ReferenceIn the case of the form, the handle portion 34 for carrying the product 1 in a completely sealed state can be formed.referenceIn addition to the action and effect of the form, the product 1 can be completely protected by the film 3 while ensuring good handling in transportation and the like.
[0059]
  In addition to the above, as a method for forming the handle portion 34, the bag-shaped film 3b is pressed by pressing it with the pressing die 10a from the entrance of the shrink tunnel 7 (see FIG. 4). Heating by the shrink tunnel 7 and subsequent cooling may be performed in the state. In addition, when pressing is performed immediately after heating by the shrink tunnel 7, the operator may perform the pressing manually by using only the pressing mold 10 a without using the above-described pressing mold apparatus 10.
[0060]
<Other embodiments>
  The present invention isRealThe present invention is not limited to the embodiments and includes various other embodiments. That is, in the above embodiment, the binding by the PP band 9 is the second.referenceAlthough applied to the one using the tubular film 3 of the form, the first is not limited to this,referenceYou may apply to the thing using the bag-shaped film 3 of a form. Even in this case, the same effect as that of the embodiment can be obtained as the action and effect of binding by the PP band 9.
[0061]
  In addition, the above3 ReferenceIn the form, the second is to reduce the film material.referenceHowever, the present invention is not limited to this. For the purpose of increasing the load bearing strength by the film 3, the first is used.referenceYou may apply when using the bag-shaped film 3 of a form. In this case, the load resistance strength of the film 3 can be increased by utilizing the relative displacement resistance in the vertical direction between the film 3 and each protective tray 2a exhibited by the chamfer 23.
[0062]
Furthermore, the above4 ReferenceIn the form, it is configured by a bag-like recess formed in the film 3 itself as the handle portion 34, but is not limited to this, for example, as shown in FIG. By forming the recessed cutout 24, the cutout 24 may be used as a handle portion. In this case, the film 3 is pushed by hand to the side of the notch 24 using the flexibility of the film 3, and the package is carried by placing the hand on the notch 24 from the outside of the extended film part. Can do. Further, in addition to the notch 24 described above, a handle hole having a size that allows a hand to be placed on both side surface positions of the protective tray 2 may be formed. In this case, as the handle hole, only the exterior material 22 or a concave hole or a through-hole that opens outward with respect to both the exterior material 22 and the buffer material 21 may be formed. Further, without forming a handle hole in advance, a perforation is formed in advance in the exterior material 22 or the like along the handle hole, and an operator breaks the position of the perforation by hand when carrying it. By doing so, the handle hole may be formed.
[Brief description of the drawings]
FIG. 1 shows the first of the present invention.referenceIt is a perspective view which shows a form.
FIG. 2 is an exploded perspective view in which a film is omitted.
3 is a longitudinal sectional view of the package of FIG.
FIG. 4referenceIt is a perspective view which shows the principle of the packaging method of a form.
FIG. 5referenceIt is a perspective view which shows a form.
FIG. 6referenceIt is a perspective view which shows the principle of the packaging method of a form.
FIG. 7referenceIt is a figure corresponding to FIG. 5 which shows the other aspect of a form.
[Fig. 8]FruitIt is a perspective view which shows embodiment.
9 is a longitudinal sectional view of the package of FIG.
FIG. 103 ReferenceIt is a perspective view which shows a form.
FIG. 114 ReferenceIt is a perspective view which shows a form.
12 is a partial cross-sectional view mainly using the handle portion of FIG.
FIG. 13referenceIt is a fragmentary perspective view which shows a form.
FIG. 14 is a perspective view showing a conventional package.
[Explanation of symbols]
1 Product (packaged items)
1c Intermediate part (intermediate part of the package)
2,2a Protection tray (protection member)
3After heat shrinkageIllMu
3b Bag-like film
3c Tubular film
9       PP band (tie tie)
23 Chamfer
24 Notch (HandlePart)
31 Middle part ( Middle part of film )
32 windows
34Part
S clearance

Claims (6)

A pair of protective members that are externally fitted to the respective ends on both sides in one direction of the article to be packaged and that protrude in the direction perpendicular to the one direction over the entire periphery rather than the periphery that constitutes each end ;
A binding string that spans and binds the pair of protective members so as to press against the packages,
E Bei a heat-shrinkable bag-like film covering in a closed state the whole of the pair of protective members and the material to be packaged,
The binding string has its tensile strength set stronger than that of the bag-shaped film, and is stretched between the pair of protective members in a tension state,
The bag-like film is covered so as to enclose the binding string with respect to the pair of protective members and the entire packaged object,
By upper SL bag-shaped film is heat shrinkable in close contact, respectively on the outer surfaces of both the protective member with the pair of the protection member and the packaged articles are held together, the both protection state after the thermal contraction While the intermediate part of the article to be packaged located between the members and the intermediate part of the film after heat shrinking located opposite to each other outside the intermediate part are separated from each other, a gap is formed between them,
Even if the middle part of the film after the heat shrinkage tends to be sucked in the form of a bow toward the middle part of the package due to the heat shrinkage, the film is blocked by the binding string stretched in the tension state, A packaging body characterized in that a gap between an intermediate portion of an object to be packaged and an intermediate portion of the film after heat shrinkage is wider than that in the case where the binding string does not exist . A pair of protective members that are externally fitted to the respective ends on both sides in one direction of the article to be packaged and that protrude in the direction perpendicular to the one direction over the entire periphery rather than the periphery that constitutes each end ;
A binding string that spans and binds the pair of protective members so as to press against the packages,
E Bei a heat-shrinkable tubular film covering in a state where both ends outer periphery of the pair of protective members and the packaged articles is open,
The binding string has its tensile strength set stronger than that of the tubular film, and is stretched between the pair of protective members in a tension state,
The cylindrical film is covered so as to enclose the binding string with respect to the pair of protective members and the entire packaged object,
By upper Symbol tubular film is heat shrinkable in close contact, respectively on the outer surfaces of both the protective member with the pair of the protection member and the packaged articles are held together, the both protection state after the thermal contraction While the intermediate part of the article to be packaged located between the members and the intermediate part of the film after heat shrinking located opposite to each other outside the intermediate part are separated from each other, a gap is formed between them,
Even if the middle part of the film after the heat shrinkage tends to be sucked in the form of a bow toward the middle part of the package due to the heat shrinkage, the film is blocked by the binding string stretched in the tension state, A packaging body characterized in that a gap between an intermediate portion of an object to be packaged and an intermediate portion of the film after heat shrinkage is wider than that in the case where the binding string does not exist . In claim 1 or claim 2,
Above for tensile strength in the direction of the film connecting the both ends of the packaged articles, packaging, characterized in that it is set to have a self-weight or equivalent load bearing strength of the material to be packaged. In claim 1 or claim 2,
On the outer surface of the outermost corner portion of each of the protective members, a substantially triangular chamfered portion having apexes located at three ridge angles perpendicular to each other is formed, and the film is heated against the chamfered portion. A package characterized by being adhered by shrinkage. In claim 1 or claim 2,
It said protection member has a outer package of box-shaped with a bottom having an opening only on one, correspondingly and outer contour to the outer surface shape of each end of the inner surface shape is to be packaged corresponds to the inner surface shape of the outer package A package comprising a combination with a cushioning material. In claim 2 ,
The two protective members are arranged in the tubular film so as to face both end openings of the tubular film, and the binding string faces both window portions formed by heat shrinking the both end openings of the tubular film. It is arrange | positioned so that it may be exposed to.

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