JP2006044700A - Tear unsealing mechanism of packaging container and serrate punching blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate fabrication of a punching die, and a tear unsealing mechanism of a packaging container which affords a degree of freedom in forming cut lines as an unsealing means to offer an improved economical advantage. <P>SOLUTION: Two cut lines 11, which are formed intermittently as the unsealing means for the container made up of a sheet material, are formed by making serrate incisions with respective bridges 13 formed at every given pitch. The cut lines 11 are arranged in parallel with each other in an arbitrary direction to form an unsealing line 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tear opening mechanism for a packaging container suitable for use mainly in a paper box and the like, and a corrugated punching blade suitable for forming the tear opening mechanism.

  Conventionally, as an unsealing means that makes it easy to take out contents in a paper packaging box (hereinafter simply referred to as a paper box), it is referred to as a zipper provided with two intermittent cut lines. A tear structure is known. Such opening means is disclosed in Non-Patent Document 1.

  However, in the unsealing means disclosed in Non-Patent Document 1, the incision formed is intermittently cut so that it can be torn only in a certain direction, and the opposite side is provided. There is a problem in that when trying to open from the above, it will not be able to play the role of tearing and unsealing by cutting off in the middle of the tear band, disengaging intermittently provided cuts. For this purpose, Japanese Patent Application Laid-Open No. H10-228667 discloses a tearing portion as an opening means that can be torn open from either side without difficulty.

  In general, when a paper container is manufactured, a blank is obtained by punching a material sheet into a developed state of a required paper box and forming a paper box having a desired shape. Therefore, when manufacturing the blank of this paper box, the part used as an opening means is also formed simultaneously. In the blank punching process, a punching die is always used, and the punching die for punching the sheet into a desired size and a ruled stamping blade for engraving crease lines are shown in the design drawing. Based on the punching die plate surface is used.

  In order to form two cut rows in parallel at a location to be opened of a paper box as an opening means known from Non-Patent Document 1 or Patent Document 1, a punching blade for providing a cut row in the punching die is provided. It is necessary to plant. In order to form the punched portion of the cut line, an operation of implanting a small cutting blade prepared in accordance with the designed dimensional shape is performed. For example, in order to obtain the cut row 101 as the opening means 100 having the shape shown in FIG. 9A, in order to form the cut 102, as shown in FIG. A groove 103 for implanting the base 111 of the small cutting edge 110 is engraved in the groove 103 (generally formed of plywood) in accordance with the shape of the cut 102 by a laser, and the groove 103 corresponds to the cut 102. The operation of planting the base portion 111 of the small cutting edge 110 bent at the cutting edge is implanted for each blade by the required number of the cutting row 101 to form two cutting rows. In addition to this, as a punching blade used for forming the tear-opening means, for example, as shown in FIG. There is a single punching blade 120 that is formed and formed with a tear guiding portion 105 that facilitates tearing by interrupting the cutting edge 121. This punching blade 120 is a zipper that forms two types of punching blades with different directions of the bending blade portion 122 provided on the cutting edge 121 and uses them in parallel at a required interval to form the tear band 106. Sometimes used as a forming punch (generally referred to as a zipper blade).

JPO Gazette 53-219 [2568] (Knowledge and Conventional Techniques (Packaging Industry) P288, P289, P294) Japanese Patent No. 3462192

  However, since the punching blades 110 forming the cut row 101 as shown in FIGS. 9A and 9B are configured by arranging small cutting blades one by one as described above, the punching blades 110 are more carefully arranged. And if it is not planted with high accuracy, it tends to be uneven. Even if it is correctly planted, if punching is performed, irregularities of the blade edges appear and adjustment work must be performed, which requires a lot of work. Further, since the small cutting edge (the punching blade 110) is implanted in the groove 103 provided in the template 105, the small cutting edge may fall out during the punching operation, and the small cutting edge may be lost. When such a situation occurs, the processing is continuously performed, so that many defective products are generated. Therefore, although it seems to be simple at first, the punching die is required to be finished with very high accuracy, and it is inevitable that the cost is increased.

  Further, when the punching blade 120 for forming a zipper as shown in FIG. 10 is used, the workability is improved when planting the blade in the punching die as compared with the method of planting the small cutting blade. There are advantages. However, the punching blade 120 is formed by bending the cutting edge 121 in advance at a predetermined pitch at a large number of locations at the time of manufacturing the blade, so that the cutting blade 120 is formed. Further, it is difficult to bend. The punching blade 120 has a problem that a part of the cutting edge is cut and bent at the time of manufacturing the blade, so that there is a problem that the bent cutting edge is lost due to metal fatigue during the punching operation. Further, the tear direction of the formed tear band is also limited.

  For this reason, even if there are proposals for the design of various cuts on the figure, it is difficult to finish with high precision when it is complicated, and when the interval between the implanted parts of the parallel punching blades becomes narrow, the punching die The punching die (not shown) to be attached to the sheet (which serves to push back the sheet side when the die retreats after being punched with a sponge material) cannot be secured. There is a problem.

  The present invention solves such problems, facilitates the production of a punching die, and has a degree of freedom in forming a row of cuts as an opening means so as to improve the economy. An object of the present invention is to provide a corrugated punching blade suitable for forming the tear opening mechanism together with the tear opening mechanism.

In order to achieve the above object, the tear opening mechanism of the packaging container according to the first invention comprises:
A tear-opening mechanism for a packaging container formed of a sheet material, characterized in that it is formed by corrugated incisions provided with connecting portions at a necessary pitch.

Moreover, the tear opening mechanism of the packaging container according to the second invention is:
A tear-opening mechanism for a packaging container formed of a sheet material, wherein two cut lines are formed by corrugated cuts each having a connecting portion at a required pitch, and arranged in parallel in an arbitrary direction. It is a feature.

  In the second aspect of the invention, the two cut lines may be provided with a curved line in the entire length or in a part of the section (third aspect).

  In the first invention or the second invention, the tear opening mechanism of the packaging container may be provided with an opening start position in the cut line (fourth invention).

Next, the corrugated punching blade according to the fifth invention is
The cutting edge portion is formed in a waveform at a required pitch, and a notch for forming a connecting portion at the required pitch is provided in the cutting edge portion of the waveform.

  According to the first aspect of the present invention, for example, a punching blade called a wave blade is used to form a row of cuts provided as opening means, and punching is performed by forming notches at a predetermined interval in the blade edge portion. At the same time, there is an advantage that a joint portion that forms a cut without being separated is obtained at the same time, and unlike a combination of divided small cutting blades, a reliable intermittent cut can be created with a series of punching blades. In addition, by doing so, it is possible to solve the problems that occur in the punching die creation in forming the conventional tear opening means, and the cost can be reduced. Moreover, since a series of punching blades are used, by setting the position of the connecting portion according to the product to be obtained, the entire cutting edge is formed into a corrugated shape and the paper by cutting the connecting portion. The advantage of reducing the surface peeling and enhancing the aesthetic effect is also obtained.

  According to the second invention, as in the first invention, the punching die can be easily created, the cuts can be surely formed, and the tearing direction is determined by the opening means having a series of corrugated cut lines. There is an advantage that it is not specified and can be torn and opened from both ends. Furthermore, since the cut line can be punched and formed using a wave blade, it can be provided in a curved line as well as in a straight line, so the product package can be designed in a packaging box using paperboard. The desired opening line can be formed accordingly. In addition, the position where the cut joint is formed is formed in a portion that is inconspicuous on the container main body side remaining after opening, so that peeling on the container surface side due to tearing at the time of opening is conspicuous The effect is that the design of the package is not impaired.

  Further, by adopting the configuration of the third invention, it is possible to give an unprecedented degree of freedom to the design of the product package. In addition, the cut row is not necessarily provided in parallel with the whole, but a curved portion or the like can be freely provided at a part thereof, and the shape of the opening can be made to correspond to the contents other than the role of opening. There is an effect.

  Furthermore, by adopting the configuration of the fourth invention, the consumer can open at the openable portion in the intermediate portion without looking for the starting end portion of the opening means when opening the package, thereby improving the convenience of handling. There is an effect that can be done.

  Further, according to the corrugated punching blade of the fifth invention, the cutting edge is formed in a corrugated shape of a required pitch as a punching blade that forms a cut line (cut line) for opening the container by tearing like a tearing opening mechanism of a packaging container. With the blade formed in the above, by forming a cut at the top (peak) or trough of the wave at the required pitch at the corrugated cutting edge, a connecting portion is formed on the sheet surface from which the cut is punched. Waveform cuts can be formed intermittently. Therefore, the blade having the required length can be directly planted on the plate surface of the punching die in the same way as the straight punching blade, so that there is an advantage that workability can be remarkably improved. And since it can be bent similarly to the punching blade of a straight blade, there is an effect that not only a straight line but also a cut line not only in a curve can be formed freely and easily. In addition, the corrugated punching blade referred to here is used as a punching blade including a blade that is formed in a corrugated shape only with a blade edge portion generally called a wave blade and a blade that is formed in a corrugated shape with a large pitch as a whole. It is.

  Next, a specific embodiment of the tear-opening mechanism of the packaging container according to the first invention will be described with reference to the drawings.

  FIG. 1 is a perspective view schematically showing an embodiment of a packaging box having a tear opening mechanism of the present invention. 2 is an enlarged plan view of the cut row, and FIG. 3 is an enlarged perspective view showing a part of the punching blade forming the cut row.

  The tear opening mechanism 10 of this embodiment is provided on one side connected to the upper surface of the packaging box 1 having a rectangular parallelepiped sealing structure, and when opened, one side of the opening 2 is formed by a crease line 3 '. It is used for a container having a structure in which the opening 2 is arranged around the opening 2 so as to form the lid piece 3.

  The opening row 11 for opening is a cut 12 punched into a waveform at a required pitch P, and a connecting portion 13 is provided at an appropriate interval P ′ in the middle of the cut row 11. ) Are connected to each other.

  The cut line 11 is formed by a punching wave blade 40 used for a punching die when a blank forming a box is punched from a sheet material. As illustrated in FIG. 3, the punched wave blade 40 is formed of a bendable band-shaped blade obtained by bending a blade tip portion 41 into a wave shape on a plane at a predetermined pitch Pa, and a base portion 42 is basically formed. It is straight (but not limited to this). And in order to form the connection part 13, the cutting edge 43 is provided in the blade edge | tip part 41 at an appropriate space | interval, and this cutting 43 part becomes the connection part 13 without cut | disconnecting a sheet | seat at the time of punching. Therefore, in the blank blanking process of the box body, the cut line 11 can be formed in which the cut line 11 does not occur even if the cut line 11 is not a straight line but includes the bent portion 11a and the curved portion 11b as shown in FIG. It is. Of course, as with the other punching blades, the punching wave blade 40 can have a long dimension and can be planted on the punching die plate surface (not shown) according to the punching shape. If the cutting tool groove is formed, it can be planted quickly.

  In the tear opening mechanism 10 formed in this way, as shown by a two-dot chain line in FIG. 1 from the opening start position a along the cut line 11, when the lid piece end portion 3a is pulled up, the waveform is intermittently cut. Since the connecting portion 13 is arranged at the top of the mountain at the required portion of the line (cut row 11) cut into the waveform in the provided portion, even if the connecting portion 13 breaks, It is cut correctly and can be opened as planned. And since the cut line 11 has a waveform on the edge of the opened cut portion, it is possible to make the touch feel good by setting the pitch P of the waveform to an appropriate dimension in advance. Even if it touches a finger, safety can be maintained without being damaged. Moreover, since the connection part 13 is located in the peak part (mountain part) of the waveform which forms the edge of the opening part 2 of a packaging box, it is cut | disconnected without peeling off the surface part which adjoins easily at the time of tearing . Moreover, since the cutting trace of the connection part 13 exists in the trough part of a waveform when it sees from the packaging box 1 main body side, the cutting trace is buried in the cut edge of a waveform and does not impair the aesthetics of a main body.

  In the above-described embodiment, the description has been given of the case in which the opening 2 where the lid pieces 3 remain is formed by the cut row 11. However, if the cut row 11 is provided in an endless state (not shown), the cut portion is removed by the opening operation. Thus, an opening can be formed. Further, when the cut line 11 is linearly provided on the entire circumference at the required position of the container, it can be opened in a state where the container is divided by being cut along the cut line 11.

  Next, a specific embodiment of the tear-opening mechanism for a packaging container according to the second invention will be described.

  FIG. 4 is a perspective view showing an embodiment of the tear opening mechanism according to the present invention. FIG. 5 shows a partially enlarged plan view of the opening line.

  The tear opening mechanism 10A of this embodiment has a structure in which the above-described cut row 11 is provided in parallel at a predetermined interval to form an opening line 15. The parallel cut rows 11, 11 are formed by using the above-described punched wave blades 40, and when the gap formed between the rows is punched, the punched wave blades 40 are separated from the processed sheet. , 11 is simply formed by a push-back member (generally an elastic body such as a slightly high-density sponge material or cork material) attached to a punching die at a portion to be a strip-shaped tear band 16 formed between the punched wave blades. Can be intervened.

  The unsealing line 15 by the two cut lines is provided at a location where the box is to be unsealed. At that time, depending on the shape of the box, for example, as shown in FIG. 4, the arc-shaped opening line 15 can be formed in parallel. That is, by using the punched wave blade 40 as described above, a single long blade material can be used. Therefore, the punched wave blade 40 is bent into a required shape according to the design. It can be realized by planting on the plate surface.

  When the box thus obtained is filled and packaged and opened, if the tear line 16 end 16a or 16b of the opening line 15 is picked and pulled up, two parallel cut rows 11, 11 are formed in parallel. If each tearing part 13 is cut | disconnected sequentially along tearing and the tear strip 16 is removed, it will open. At this time, a large number of connecting portions 13 provided in the middle by tearing along two parallel cut rows 11 and 11 are sequentially torn according to the cuts 12 connected to each other, and are provided in an arc shape. Can be torn and opened without any problem. Therefore, even if the opening line 15 has a shape other than a straight line according to the design, it can be opened without any problem. Further, the portion along the cut line 12 after being opened, that is, the edge portion is formed in a corrugated shape and exhibits an aesthetic appearance, and does not damage the fingertip even if it comes into contact with the fingers. In addition, if the connection part 13 is provided in the position which becomes a waveform top part in the state which removed the tear belt | band | zone 16, the surface which forms a box at the time of tearing is rarely peeled. Moreover, the broken part appears softly in the cut state and can be handled without damaging the fingertip.

  Further, if this tear opening mechanism 10A is employed, the tear opening direction can be determined regardless of the direction of tear opening, so that the tear band 16 can be opened without being broken in the middle from either the left or right direction. Further, as shown in FIG. 6, if the tear start end portions 16 c and 16 c are provided in the middle of the opening line 15, the opening line 15 can be opened not only from the end portion but also from the middle portion to the left and right. Convenient for long cases.

  Furthermore, since the tear opening mechanism 10A can be formed not only in a straight line but also in a curved state as described above, there is an advantage that the opening position can be adjusted according to the design of the product package. Moreover, for the opening line 15, for example, as shown in FIG. 7, even if the two cut rows 11, 11 are arranged separately according to the design, they are opened following the cut row 11. Therefore, it can be used as an unsealing means not found in conventional products.

  Moreover, in the said embodiment, by changing the distribution of the connection part 13 of the cut line 11 which comprises the opening line 15 from the required area of a tear start part to an end part, tearing force is controlled and it opens effectively. You can also For example, the interval at the end portion is made longer than the tear start portion. When configuring an opening line for drawing a curve, it is desirable to prevent cutting in the middle of the tear band by changing the distribution of the curve drawing portion.

  Moreover, if the cut line is formed in accordance with the gist of the present invention, the tear start end portion can be provided in the middle of the box and opened. For example, as shown in FIG. 8, a knob 18 is formed in a part of the peripheral surface of the box 5 with a cut line (cut line 11 ′), and an opening line 15 is formed in connection with the knob 18. If this is the case, the picking portion 18 can be opened and separated by pushing it with a fingertip, and then picking the picking portion 18 and tearing it along the opening line 15. Reference numeral 19 in the figure denotes a cutting line at the start of opening.

  Further, in the tear opening mechanism according to the present invention, when forming the corrugated cut row, the connecting portion provided in the cut row is provided in the corrugated crest or trough in the description of the above embodiment. In addition to this, for example, as a tear band provided in a small box, a connecting portion can be arranged in a portion other than the corrugated peaks and valleys forming the cut line. Even in this way, the tear band can be opened without tearing during tearing. Therefore, as the corrugated punching blade used for constituting the tear opening mechanism, a corrugated punching blade provided at the cutting edge portion of the corrugated edge portion can be adopted if necessary.

  Such a tear-opening mechanism according to the present invention can be similarly employed as a means for opening a box made of a plastic sheet in addition to a box made of paperboard. It can also be used in cardboard packaging boxes. In this case, a punching blade with a larger wave pitch is used as a punching wave blade for engraving a row of cuts, unlike the paperboard packaging box described above. By doing so, an opening line similar to that described above can be formed.

The perspective view which represents typically one Embodiment of the packaging box provided with the tear opening mechanism of this invention Enlarged plan view of cut line The perspective view which expands and represents a part of punching blade which forms a cut line The perspective view showing one form of the tear opening mechanism based on 2nd invention Partially enlarged plan view of the opening line The figure showing an example at the time of providing a tear start end part in the middle of an opening line The figure showing other embodiment of a tear opening mechanism The figure showing other embodiment which provided the tear start end part in the middle of the opening line The top view (a) showing an example of the conventional tear opening means, The enlarged perspective view which shows the punching blade for forming it, and its attachment part (b) The perspective view which expands and represents a part of conventional punching blade for zipper formation, and the tearing part punched by this

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging box 10, 10A Tear opening mechanism 11 Cut row 12 Cut 13 Joint part 15 Opening line 16 Tear strip 16a, 16b, 16c Tear start end part 18 Knob part

Claims (5)

  A tearing and unsealing mechanism for a packaging container formed of a sheet material, wherein the tearing and unsealing mechanism for a packaging container is formed by corrugated notches provided with connecting portions at a predetermined pitch.   A tear-opening mechanism for a packaging container formed of a sheet material, wherein two cut lines are formed by corrugated cuts each having a connecting portion at a required pitch, and arranged in parallel in an arbitrary direction. A tearing and opening mechanism for a packaging container.   The tearing-opening mechanism for a packaging container according to claim 2, wherein the two cut lines are provided with a curved line in a full length or a partial section.   The tear opening mechanism of the packaging container according to claim 1 or 2, wherein the tear opening mechanism of the packaging container is provided with an opening start position in the cut line.   A corrugated punching blade, wherein a cutting edge portion is formed into a corrugated shape at a required pitch, and a cut is formed in the corrugated cutting edge portion to form a connecting portion at a required pitch.

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