JP2005178820A - Tearing strip of paper material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tearing strip capable of being smoothly cut at a paper material without producing peeling of its surface layer while improving its design characteristic and further capable of assuring a strength of the paper material. <P>SOLUTION: This tearing strip 11 of paper material is made so that two cutting rows 12 having many interrupted slits 13 are arranged side by side and each of the slits 13 is extended from an inward part 14 to an outward side 15. An inclination angle α of the inward part 14 against the outward side 15 of each of the slits 13 is set low at a beginning portion and a terminal portion of each of the cutting rows 12. At an intermediate portion, an inclination angle β of the inward part 14 is set large. In addition, a length L of the outward side 15 is set longer than a length S of the outward side 15 at both the beginning portion and the intermediate portion. Further, its cutting end is provided with a large holding part 16. At the beginning end and the terminal end of each of the cutting rows 12, the connecting part between the front and rear slits 13 becomes short, so that the paper material can be cut smooth and at the intermediate portion, the connecting part between the front and rear slits 13 becomes elongated, so that the strength of the paper material is assured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tear strip for a paper material used as an opening means for a paper box or the like.

  For example, as a packaging box for storing photographic print paper, as shown in FIG. 7, the front plate 52 and the pair of side plates 53 are raised from the bottom plate 51 to fold the folding pieces 55, and the folding pieces 56 from the side plates 53 to the inside. Bending and raising the rear plate 54 from the bottom plate 51, folding the flap 57 inward from the side plate 53, folding the inner lid plate 58 from the front plate 52 backward, and folding the outer lid plate 59 from the rear plate 54 forward to seal. What to do is used.

  The outer lid plate 59 is provided with a tear band 61 between both side edges, and the inner lid plate 58 and the outer lid plate 59 are bonded to each other in front of the tear band 61 with an adhesive such as hot melt. The tear band 61 is formed by two parallel cut rows 62, and the cut 63 of each cut row 62 extends from the inward portion 64 to the outer side portion 65. The shape and size of the cut 63 are the same over the entire length of the cut row 62.

  When the tear band 61 is torn from the start end side (the left back side in this figure), in each notch row 62, a tear that tends to escape inward from the tip of the outer side portion 65 of the front notch 63 is the next notch. The outer cover plate 59 can be cut and the outer cover plate 59 and the inner cover plate 58 can be opened without breaking between the parallel incision rows 62.

  By the way, in the said packaging box, since the front-end | tip corner | angular part of the outer cover board 59 is angular, the inner cover board 58 and the outer cover board 59 can be firmly adhere | attached to both end parts, and the tear strip 61 Therefore, when tearing the tear strip 61, a force is easily applied in the cutting direction, and the paper material is cut without being rolled along the cut row 62.

  However, giving priority to the design, if the tip corner of the outer lid plate 59 is rounded and the width of the tear strip 61 is reduced to about 7 mm, the inner lid plate 58 and the outer lid plate 59 are bonded to both ends. When the tear strip 61 is torn, the outer cover plate 59 is lifted and no force is applied in a predetermined direction, and there is a problem in that surface layer peeling tends to occur on the paper material.

  Further, in order to facilitate tearing of the tear band 61, if the inclination angle of the inward portion 64 with respect to the outer side portion 65 is set small in all the cuts 63 of the cut row 62, the connecting portion between the front and rear cuts 63 is shortened. The strength of the material is insufficient, and the outer lid plate 59 may be broken during transportation.

  Accordingly, an object of the present invention is to provide a tear strip that can cut a paper material smoothly so as not to cause surface layer separation and improve the strength of the paper material while improving the design.

  In order to solve the above-described problems, the present invention is a tear strip of paper material in which two cut rows in which a large number of cuts are interrupted are parallel, and each cut extends from an inward portion to an outer side portion. The inclination angle of the inward portion with respect to the outer side portion is changed depending on the portion of the cut line, and is set to be small at the start portion, large at the intermediate portion, and small again at the end portion. Further, the length of the outer side portion is set to be longer than that of the starting end portion and the intermediate portion at the terminal portion, and the interval between the cut lines is set to be large at the cutout to form a knob portion.

  As described above, if a large knob is provided at the cutout and the inclining angle of the inward part is set small at the start end part of the cut line, the connecting part between the front and rear cuts is shortened at this part. If you can start cutting the paper smoothly and set the inclining angle of the inward part in the middle part, the connecting part between the front and rear cuts will be longer in this part, ensuring the strength of the paper material, the terminal part When the length of the outer edge is set long, the paper material can be cut smoothly even at the end of cutting.

  Hereinafter, a packaging box for photographic print paper provided with a tear band according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the paperboard blank of this packaging box has a front plate 2, a pair of side plates 3, and a rear plate 4 connected around the bottom plate 1, and the front edges of the front plate 2 and the side plates 3 are folded. 5, a bent piece 6 is connected to the rear edge of the side plate 3, the flap 7 is connected from the edge of the side plate 3, the inner lid plate 8 is connected from the edge of the front plate 2, and the edge of the rear plate 4 is connected. The inner lid plate 8 is provided with a slit 10 for resealing, and the outer lid plate 9 is provided with a tear strip 11 for opening. The front end corner of the outer lid plate 9 is cut so as to be rounded in consideration of design.

  As shown in FIG. 2, the tear band 11 is formed by two parallel cut rows 12, and the cut 13 of each cut row 12 extends from the inward portion 14 to the outer side portion 15. At the left end, which is the cutout of the tear band 11, the gap between the cut rows 12 is fanned out to form a knob 16, and on the right side, the gap between the cut rows 12 is narrowed and parallel. The interval between the two cut lines 12 is set to 7 mm.

  Further, at the starting end of the cut row 12 following the knob portion 16, the inclination angle α of the inward portion 14 with respect to the outer side portion 15 of the cut 13 is set to 25 °, and the length S of the outer side portion 15 is 5.5 mm. Is set. In the middle portion of the cut row 12, the inclination angle β of the inward portion 14 is set to 35 °, and the length S of the outer side portion 15 is set to 5.5 mm. Further, at the end portion of the cut row 12, the inclination angle α of the inward portion 14 is set to 25 °, and the length L of the outer side portion 15 is set to 7 mm.

  When providing the blank as described above to the manufacturer of photographic print paper, from the state shown in FIG. 1, the side plate 3 is folded inside the bottom plate 1, and one side of the folded piece 5 is attached to the back surface of the front plate 2. Leave it attached. In this state, the blank becomes narrow and can be stored without being bulky.

  When packaging photographic print paper as shown in FIG. 3, the front plate 2 and the pair of side plates 3 are erected from the bottom plate 1 while folding the folding pieces 5, the photographic print paper is placed on the bottom plate 1, and the side plate 3 The bent piece 6 is bent inward, the rear plate 4 is erected from the bottom plate 1, the flap 7 is bent inward from the side plate 3, the inner lid plate 8 is moved backward from the front plate 2, and the outer lid plate is extended from the rear plate 4. 9 is bent forward, and the inner lid plate 8 and the outer lid plate 9 are bonded together in front of the tear strip 11.

  In the packaging box sealed in this way, the inclination angle of the inward portion 14 of the cut 13 is set large in the middle portion of the cut row 12 forming the tear band 11, and the connecting portion between the front and rear cuts 13 becomes long in this portion. Thus, the strength of the paper material of the outer cover plate 9 is ensured, and the phenomenon that the outer cover plate 9 breaks along the cut row 12 during transportation is prevented.

  Further, in the tear band 11, a large knob 16 is provided at the cutout, and the inclination angle of the inward portion 14 of the cut 13 is set to be small at the start end portion of the cut row 12 following this, and at the start end portion, the gap between the front and rear cuts 13 is set. Therefore, as shown in FIG. 4, the knob 16 can be picked and the outer lid plate 9 can be started to be cut smoothly.

  And, in the middle part of the cut row 12, the inclination angle of the inward portion 14 is set to be large so that the connecting portion between the front and rear cuts 13 is increased, so that the force required for cutting is slightly increased. Then, since the inner lid plate 8 and the outer lid plate 9 are strongly bonded to each other, the outer lid plate 9 is not lifted, and a force is applied in a predetermined direction, so that the paper material follows the cut row 12. Is cut off.

  Further, at the end portion of the cut row 12, the length of the outer side portion 15 is set long so that the connecting portion between the front and rear cuts 13 is reduced. The plate 9 can be cut smoothly.

  When the tear strip 11 is cut in this way, the outer lid plate 9 is cut and the outer lid plate 9 and the inner lid plate 8 are opened as shown in FIG. Since the flap 7 can be opened, the photo print paper can be taken out from the inside of the box.

  Further, when storing and storing surplus photographic print paper, as shown in FIG. 6, the flap 7, the inner lid plate 8 and the outer lid plate 9 are closed again, and the cut end portion of the outer lid plate 9 is closed. Can be inserted into the slit 10 and the packaging box can be resealed.

The figure which shows the blank of the packaging box provided with the tear band which concerns on this invention Enlarged view showing details of the tear band The perspective view which shows the sealing state of a packaging box same as the above The perspective view which shows the opening process by the tearing band same as the above The perspective view which shows an open state same as the above The perspective view which shows the resealing state same as the above The perspective view which shows the sealing state of the packaging box provided with the conventional tear strip

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom plate 2 Front plate 3 Side plate 4 Rear plate 5 Folding piece 6 Folding piece 7 Flap 8 Inner lid plate 9 Outer lid plate 10 Slit 11 Tear strip 12 Cut row 13 Cut 14 Inward portion 15 Outer portion 16 Knob portion

Claims (5)

  In a tear strip of paper material in which two cut rows in which a large number of cuts are interrupted are parallel and each cut extends from the inward portion, the inclination angle of the inward portion with respect to the outer side portion A tear strip of paper, characterized by varying parts.   The tear band of the paper material according to claim 1, wherein an inclination angle of an inward portion with respect to an outer side portion of the cut is set to be small at a start end portion of the cut row and large at an intermediate portion.   The tear band of the paper material according to claim 2, wherein the inclination angle of the inward portion is set to be small again at the end portion of the cut line.   4. The paper tear band according to claim 1, wherein a length of the outer side portion is set to be longer at a terminal portion of the cut line than at a start portion and an intermediate portion.   The paper strip tear band according to any one of claims 1 to 4, wherein the interval between the cut lines is set to be large at a cut-out and a knob is formed.

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