JP3957076B2 - Packaging material - Google Patents

Description

  The present invention relates to a packaging material that can easily open a heat-shrinkable film in which a packaged object is closely adhered and packaged.

  Since packaging materials that use heat-shrinkable film cannot be restored to their original packaging once opened, self-service counters are used to ensure that the products are not used and to prevent mischief. Widely used in packaging of goods for sale on display. However, the packaging material using the heat-shrinkable film has a problem that it is difficult to open the packaging material.

In order to solve this problem, there is known a technique in which a notch is provided in a heat-shrinkable film and an opening is made from this notch (for example, see Patent Document 1). However, as shown in FIG. 12, in the case where a plastic tray 100 containing lunch boxes, side dishes, etc. is packaged with a cylindrical heat-shrinkable film 101, the perforation line 102 is vertically used as an opening cut. In order to tear the perforation line 102, it is troublesome to grasp the tip of the perforation line 102 with fingers. There is a case where the line of sight 102 is torn and opened, and there is a problem that the finger is damaged by the edge portion of the tray 100.
Japanese Patent Laid-Open No. 6-321256 (FIGS. 1 and 4)

  The present invention solves the conventional problems as described above, and provides a packaging material that can easily and safely open a heat-shrinkable film in which a packaged object is closely adhered and packaged.

The packaging material of the present invention cuts a knob that can lift a uniaxially stretched heat-shrinkable film for wrapping an article to be packaged into a tubular endless direction from the stretching direction to the heat-shrinkable film. A straight short notch or a non-stretching direction in which a perforation line that is provided by a lead-in line and is obliquely outwardly continued to both sides rearward of the base end of the knob is inclined with respect to the non-stretching direction from the perforation line A tube formed by arranging a number of parallel straight short cuts in parallel and innumerably so that the inner end of the cut located at the back overlaps the outer end of the cut located at the front in one axial direction. The invention according to claim 1 is characterized in that both ends of the shape are reached. In addition, a biaxially stretched heat-shrinkable film that is fully stretched to wrap the article to be packaged is provided with a knob portion that can be pulled up from the stretching direction with a high stretching ratio by a cut line, and both sides of the proximal end of the knob portion straight short cut the perforation line which is continuously obliquely outward rearward were parallel to the small stretching direction of the linear short cut or draw ratio which is inclined with respect small stretching direction of elongation than the perforation line The invention according to claim 2 is characterized in that an innumerable arrangement is formed in parallel. And in these inventions, the article to be packaged is provided with a concave portion, and the knob portion is exposed in the gap formed between the concave portion and the heat-shrinkable film. And

  The packaging material of the present invention is the one according to claim 1, wherein the heat shrinkable film is a uniaxially stretched heat-shrinkable film that wraps the article to be packaged in a tubular endless direction. Since the handle film is provided with a knob that can be pulled up from the stretching direction, if the knob is pulled up with fingers, the perforation line that is obliquely outwardly connected to the rear side of the base end of the knob part from the perforation line. Since each of the short cuts inclined with respect to the non-stretching direction or the short cuts parallel to the non-stretching direction are arranged in parallel and reach both ends of the cylinder, As for the notch, the heat-shrinkable film tears in the stretching direction between the base end side of the knob part and the notch on the back side of the notch, and the notch and incision following the back side are cut in the stretching direction. Heat shrinkable in a cylindrical shape by continuously cutting the entire perforation line Irumu are those capable unsealed easily removed.

  Moreover, in the thing of Claim 2, the knob | pick part which can be pulled up from the extending | stretching direction with a large extending | stretching rate is cut | disconnected in the biaxially-stretched heat-shrinkable film of the bi-stretching which packages a to-be-packaged object entirely. Since it is provided by a line, if the knob is pulled up with fingers, the perforation line that is obliquely outwardly continued to the rear of both sides of the base end of the knob is inclined with respect to the extending direction smaller than the perforation line. Since incisions or small incisions parallel to the small stretching direction are arranged in parallel, each incision is between the base end side of the knob and the incision on the back side of the incision. The heat-shrinkable film has a fan-like shape at the center of the heat-shrinkable film. The entire packaging material can be easily removed It is.

  Furthermore, in the thing of Claim 3, a to-be packaged object is provided with the recessed part, and the knob | pick part was made to face in the clearance gap formed between this recessed part and a heat-shrinkable film. Therefore, if the cut line forming the knob is a perforated line, the perforated line is broken and the knob can be easily picked by pushing the knob to the gap side with fingers. Moreover, since the knob | pick part is normally connected by the perforation line, when handling a goods packaged with this packaging material, there is no possibility that a knob | pick part touches another thing and is pulled and opened.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 7 show a first embodiment, which corresponds to the invention according to claim 1 and claim 3 that cites the invention according to claim 1.
Reference numeral 1 denotes an article to be packaged, and the article 1 to be packaged is shown in FIGS. 1 and 2, and mainly has a main body 11 containing food such as lunches and side dishes, and lids 11 a, 12 a at the periphery of the opening of the lid 12. 6 is a box-type case for storing video tape, cassette tape, and the like.

Reference numeral 2 denotes a uniaxially stretched heat-shrinkable film for wrapping the packaged object 1 as described above, and the heat-shrinkable film 2 has a tubular endless orientation (indicated by the “x” axis in the figure). The direction. Reference numeral 3 denotes a tongue-shaped knob provided by a cut line 31 so that the heat-shrinkable film can be pulled up from the stretching direction, and a perforation line 4 that extends obliquely outwardly on both rear sides of the proximal end of the knob 3. 4 is a straight short cut 41 that is inclined with respect to the non-stretching direction (indicated by the “y” axis in the figure) from the perforation line 4, as shown in FIG. The end 41a is formed so as to be arranged innumerably in parallel so as to overlap in the uniaxial direction inside the outer end 41b of the notch 41 positioned forward, and is formed so as to reach both ends of the tube. The perforated lines 4 and 4 may be formed by arranging innumerable parallel short cuts 41 parallel to the non-stretching direction as shown in FIG.

  What was comprised in this way is that the heat-shrinkable film 2 which wraps the to-be-packaged object 1 in a cylindrical shape is uniaxially stretched only in a cylindrical endless direction, and the knob portion 3 that can be pulled up from the stretching direction is formed by a cut line 31. Therefore, if the knob 3 is pulled up with fingers, the diagonally outward perforation lines 4 and 4 are rearward on both sides of the proximal end of the knob 3 with respect to the non-stretching direction from the perforation line 4. As shown in FIG. 3, the short notch 41 inclined outward is parallel so that the inner end 41a of the notch 41 located at the rear overlaps the inner side of the outer end 41b of the notch 41 located at the front in the extending direction. Since it is formed so as to be arranged innumerably and reach both ends of the cylindrical shape, the heat shrinkability between the base side cut 41 of the knob 3 and the cut on the rear side of the cut 41 The back side of the film is torn in the stretching direction due to the nature of the film to tear easily in the stretching direction Those that can be easily removed by cutting the tubular heat-shrinkable film 2 is cut across perforation lines tearing continuously during the subsequent cutting 41 and cutout 41 as shown in FIG.

  In addition, since the perforation lines 4 and 4 are the short notches 41 inclined outward with respect to the non-stretching direction from the perforation lines 4 as described above, the force when the knob 3 is pulled up is the notches 41. Since it reaches the outer end 41b immediately and the tear in the extending direction continues from the outer end 41b to the inside of the inner end 4a of the rear cut 41, it can be opened with a small force. Further, when the perforation lines 4 and 4 are formed by arranging innumerable short cuts 41 parallel to the non-stretching direction as shown in FIG. Although the force does not immediately reach the outer end 41b of the notch 41, the perforation line 41 can be similarly cut and opened by pulling up the knob 3 with fingers.

  In addition, as shown in FIGS. 1 and 2, the package 1 includes a main body 11 of the tray 11, such as a tray with a hook that has flanges 11 a and 12 a stretched around the opening periphery of the main body 11 and the lid 12. If a recess is provided so that an L-shaped recess is formed between the lid 12 and the flanges 11a, 12a, the knob 3 is positioned so as to face the gap s between the recess and the heat-shrinkable film 2. If the cut line 31 forming the knob portion 3 is a perforation line, the perforation line is broken and the knob portion 3 can be picked if the knob portion 3 is pushed into the gap side with fingers. Become. Moreover, since the knob | pick part 3 is normally connected by the perforation line, when handling the goods packaged with this packaging material, there is no possibility that the knob | pick part 3 touches another object and is pulled and opened. .

  In addition, when the package 1 is a flat box-shaped case in which the gap s for pushing the knob 3 is not formed as shown in FIG. 6, the knob 3 is continuous so that it can be picked immediately instead of the perforation line. The cut lines 31 are formed. In this case, in the state before the heat-shrinkable film 2 is packaged, as shown in FIG. 7, a part of the corner portion of the cut line 31 forming the knob portion 3 is left in a dotted shape and connected. If this is the case, there is no inconvenience that the knob 3 hangs down and is sandwiched between the package 1 and the heat-shrinkable film 2 when the package 1 is stored in the packaging material, and is connected in a dotted manner. If the heat-shrinkable film 2 is heat-shrinked after storing the non-package 1, it will break due to the shrinkage and the knob 3 will be picked up with fingers. Further, even if the cut line 31 forming the knob 3 is a perforation line, the perforation line can be broken by rubbing the knob 3 with fingers, so there is no particular inconvenience even if the cut line 31 is a perforation line. Of course.

[Second Embodiment]
FIGS. 8 to 11 show a second embodiment, which corresponds to the invention described in claim 2 and claim 3 in which the invention described in claim 2 is cited.
Reference numeral 1 denotes an article to be packaged. As shown in FIGS. 8 and 9, the article to be packaged 1 is mainly food such as bento lunches and prepared foods as shown in FIGS. 1 and 2 of the first embodiment. Is a tray with ridges in which ridges 11a and 12a are stretched around the opening periphery of the main body 11 and the lid body 12. 11 is a box-type case containing a video tape, a cassette tape, or the like. Reference numeral 2 denotes a partially stretched biaxially stretched heat-shrinkable film that covers and covers the entire surface of the article 1 to be packaged.

Reference numeral 3 denotes a tongue-like knob provided by a cut line 31 so that the heat-shrinkable film 2 can be pulled up from a drawing direction (indicated by an “x” axis) in the drawing) having a high drawing ratio. A straight short cut in which the perforation lines 4, 4, which are obliquely outwardly connected to both rear sides of the base end, are inclined with respect to a stretching direction (indicated by a “y” axis in the figure) having a lower stretching ratio than the perforation line 4. As shown in FIG. 3 of the first embodiment, the inner end 41a of the notch 41 located at the rear is inside the outer end 41b of the notch 41 located at the front in the extending direction with a large extension rate. A fan-shaped portion is formed between the two perforation lines 4 and 4 by being arranged innumerably in parallel so as to overlap. As shown in FIG. 4 of the first embodiment, the perforation lines 4 and 4 are infinitely arranged in parallel with a number of straight short cuts 41 that are parallel to the drawing direction having a low drawing rate. It may be formed.

  In addition, the heat-shrinkable film 2 is formed in a cylindrical shape with the stretching direction having a large stretching ratio endless, as shown in FIG. After that, both end openings 21 and 21 are heat-welded, and then the heat-shrinkable film 2 is heat-shrinked so that the entire surface of the package 1 is packaged according to its shape.

  What was comprised in this way is the cut part 31 which can pull up the knob | pick part 3 which can be pulled up from the extending | stretching direction with a large extending | stretching rate to the biaxially-stretched heat-shrinkable film 2 of the unstretched biaxial stretching which wraps the to-be packaged object 1 whole. If the knob 31 is lifted with fingers, the two perforated lines 4 and 4 obliquely outward toward the rear of both sides of the base end of the knob 3 have a lower stretch rate than the perforated line 4. The short notch 41 inclined with respect to the extending direction is parallel so that the inner end 41a of the notch 41 located at the back overlaps the inner side of the outer end 41b of the notch 41 located at the front in the extending direction having a high draw rate. Since the incisions 41 are arranged innumerably, the notches 41 are stretched between the base end side of the knob 3 and the notches 41 on the rear side of the notches 41 so that the heat-shrinkable film 2 is easy to tear. Cut between the cuts 41 and the cuts 41 that continue to the rear side. Since the entire cut perforation line 4 is cut, the central portion of the heat-shrinkable film 2 is largely peeled off in a fan shape as shown in FIG. It can be removed.

  As described above, since the perforation lines 4 and 4 are arranged in parallel with an infinite number of short cuts 41 that are inclined with respect to the stretching direction having a smaller stretch rate than the perforation line 4, the picking portion 3 is lifted. The force of time immediately reaches the outer end 41b of each notch 41, and the tear in the extending direction with a large stretching rate continues from the outer end 41b to the inside of the inner end 41a of the rear notch 41. It can be opened with little force. Further, in the case where the perforation lines 4 and 4 are formed by arranging innumerable short cuts 41 parallel to the drawing direction having a low drawing rate, the force at the time of lifting the knob 3 is reduced. Although the outer end 41b of the insert 41 is not immediately reached, the perforation line 41 can be similarly cut and opened if the knob 3 is pulled up with fingers.

  In addition, as shown in FIGS. 8 and 9, the package 1 includes a main body 11 of the tray, such as a tray with a hook in which flanges 11 a and 12 a are stretched around the opening periphery of the main body 11 and the lid 12. If a recess is provided so that an L-shaped recess is formed between the lid 12 and the flanges 11a, 12a, the knob 3 is positioned so as to face the gap s between the recess and the heat-shrinkable film 2. If the cut line 31 forming the knob portion 3 is a perforation line, the perforation line is broken and the knob portion 3 can be picked if the knob portion 3 is pushed into the gap side with fingers. Become. Moreover, since the knob | pick part 3 is normally connected by the perforation line, when handling the goods packaged with this packaging material, there is no possibility that the knob | pick part 3 touches another object and is pulled and opened. .

  In addition, when the package 1 is a box-shaped case as shown in FIG. 11 in which the gap s for pushing the knob 3 is not formed as described above, the knob 3 can be picked immediately instead of the perforation line. Since what is formed by the continuous cut lines 31 as possible is the same as that shown in FIGS. 7 and 8 of the first embodiment, the description thereof is omitted.

It is a partially cutaway perspective view showing the first embodiment. It is a perspective view which shows the opening process of 1st Embodiment. It is a top view which shows the principal part of 1st Embodiment. It is a top view which shows the other principal part of 1st Embodiment. It is a perspective view which shows before packaging in 1st Embodiment. It is a perspective view which shows the other example of 1st Embodiment. It is a top view which shows the principal part of the other example of 1st Embodiment. It is a partially cutaway perspective view showing a second embodiment. It is a perspective view which shows the opening process of 2nd Embodiment. It is a top view which shows the principal part of 2nd Embodiment. It is a perspective view which shows the other example of 2nd Embodiment. It is a perspective view which shows the conventional representative example.

Explanation of symbols

1 Package 2 Heat-shrinkable film 3 Knob
31 Cut line 4 Perforated line
41 depth of cut

Claims (3)

A uniaxially stretched heat-shrinkable film for wrapping an article to be packaged is provided with a cutting line that can be pulled up from the stretching direction on the heat-shrinkable film with a slitting line as the endless direction of the cylinder. A straight short cut in which a perforation line that is obliquely outwardly continued to both sides rearward of the base end of the knob is inclined with respect to the non-stretch direction from the perforation line, or a straight short line that is parallel to the non-stretch direction. The incision is formed by arranging innumerably in parallel so that the inner end of the incision located in the rear overlaps the outer end of the incision located in the front in one axial direction and reaches both ends of the tube A packaging material characterized by that. A biaxially stretched heat-shrinkable film that stretches the entire surface of the article to be packaged is provided with a cut line that can be pulled up from the stretching direction with a large stretch rate, and at the rear of both sides of the base end of the knob. A straight short notch in which a perforation line that extends obliquely outward is inclined with respect to a drawing direction having a lower draw ratio than the perforation line or a straight short cut that is parallel to a drawing direction having a low draw ratio is parallel. A packaging material, wherein the inner end of the notch positioned rearward is arranged in parallel and innumerably so as to overlap the inner end of the outer end of the notch positioned forward .   The packaging material according to claim 1 or 2, wherein the article to be packaged is provided with a recess, and a knob is faced in a gap formed between the recess and the heat-shrinkable film.

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