JP2017128364A - Packaging container having breakable structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container having a breakable structure applied with a processing facilitating crushing so as to achieve amount reduction/volume reduction when disposing of an unnecessary packaging container.SOLUTION: There is formed a breaking perforation which is provided as a fragile portion capable of cleaving a bottom surface of a packaging container by avoiding the center area of the bottom surface, and presents a non linear shape. The breaking perforation presents, for instance, a mountain type shape in which a curved region formed from at least one arc, and two linear regions each extending in the peripheral edge direction of the bottom surface from one end side and the other end side of the curved region. The breaking perforation is preferably formed so as to position a connection part in the crown of the arc forming the curved region. The packaging container having the structure as above can be easily and flatly crushed from the lateral surface direction by cleaving the bottom surface along the breaking perforation so as to achieve amount reduction/volume reduction of the packaging container.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging container that can store, transport, store, and display products, and more specifically, when a packaging container that is no longer needed due to consumption of the stored products is discarded, the amount is reduced. -It is related with the packaging container which has the fracture | rupture structure in which the process which makes it easy to crush flatly was performed in order to achieve volume reduction.

  Packaging containers for storing and transporting products are indispensable in order to prevent the products from being contaminated and to design the surface of the packaging so as to stimulate (raise) the willingness to purchase. Further, when the stored product is easily damaged by an external impact or the like, it is desirable that the packaging container is strong and excellent in durability and high in mechanical strength.

  On the other hand, when the packaging container becomes unnecessary, it is desired to reduce the volume and reduce the volume as much as possible so that it can be easily discarded without being bulky. However, in the case of a packaging container that is strong, durable, and has high mechanical strength to protect the stored product, it cannot be easily crushed and cannot be sufficiently reduced in volume. In particular, in the case of a packaging container having a high strength at the bottom part, it is difficult to discard the bottom part because the bottom part remains unbroken even if the side part is crushed.

  Therefore, as a means for destroying the bottom of the container, by making a fold line on the bottom of the paper cup, the bottom can be easily folded along the fold line, and the paper cup that is no longer needed is flatly crushed. A technique for reducing the volume and reducing the volume has been proposed (see, for example, Patent Document 1).

  However, in the case of the broken line shown in Patent Document 1, it is difficult to apply to a packaging container that houses, conveys, stores, and displays a product that is easily damaged by an external impact or the like. In other words, if the bottom of the packaging container is bent to make it easier to bend, the mechanical strength against the stress received from the side of the packaging container is reduced, and the packaging container is easily crushed by external impacts, etc., and the contained goods are damaged. There is a risk that.

On the other hand, if the strength of the bottom member is increased so that the packaging container is not easily crushed by an external impact, the bottom part is difficult to bend along the fold line, and a fold line is provided at the bottom of the packaging container. Will not make sense.
Therefore, the fold line shown in Patent Document 1 is applied to a container formed of a member having low mechanical strength that is not intended to contain, convey, store, and display a product, such as a paper cup. Although it is sufficient, it can be said that it is not suitable for a semi-rigid packaging container formed of a strong and durable member having high mechanical strength.

  In addition, referring to the technique shown in Patent Document 1, a bottom perforation is formed along the perforation by applying a perforation having a straight line shape to the center of the bottom portion of the packaging container and breaking the perforation by applying stress to the perforation. Is easily conceived from the vicinity of the center, and the packaging container can be easily crushed in a plane.

  However, if the perforation is a straight line, pressing the perforation part with a finger to cleave the perforation will cause the finger to be inserted through the bottom of the cleaved perforation and break. It is not desirable because fingers may be pinched between the edges of the perforation at the bottom, which may cause wounds.

  Therefore, by packaging the bottom plate of the corrugated cardboard box and the packaging box with a perforation that forms a straight line and opening the entire surface, packaging is performed without fingers being sandwiched between the perforations on the broken bottom plate. Several techniques have been proposed to facilitate crushing the container in a planar manner so as to reduce the volume and volume of the bottomed container to be discarded (see, for example, Patent Documents 2 and 3).

  However, in the case of the perforation shown in Patent Documents 2 and 3, since the perforation is formed through the center region of the bottom plate, the manufacturing process of the packaging container, the accommodation and transportation of goods In the process of storage and display, stress is applied to the perforations, and the perforations may be unintentionally cleaved. Such unintentional perforation occurs when the bottom plate (the edge) receives an impact from the side of the packaging container and when the packaging container is efficiently mechanically manufactured using an apparatus. Sometimes.

  For example, when a bottomed cylindrical packaging container is mechanically manufactured using a bottomer (bottom sticking device), a cylindrical body manufactured in advance is inserted and supported so as to cover the bottom mandrel, and then this cylinder A bottom member that is a bottom plate manufactured by punching in advance is disposed in the bottom-side opening of the cylindrical body, and the cylindrical body and the bottom member are joined by folding the bottom-side opening edge of the cylindrical body. In this case, the perforation is formed in the bottom member in advance so as to be located in the central region of the bottom surface portion, or formed in the central region of the bottom plate after joining the cylindrical body and the bottom member. It becomes. And, the finished packaging container is pulled out from the mandrel, but the inside of the packaging container supported by the mandrel is close to the state where the bottom side opening of the cylindrical body is closed by the bottom member, By pulling out the packaging container from the mandrel, negative pressure is generated inside the packaging container. Therefore, air is jetted from the inside of the mandrel toward the center region of the bottom plate of the packaging container in order to alleviate this. However, a part of the perforation applied to the bottom plate may be cleaved due to the negative pressure generated inside the packaging container and the pressure applied by the air ejected from the inside of the mandrel.

  In other words, the perforation is formed so that it can be easily cleaved by applying stress from the outside, so when a part of the perforation is cleaved by some impact, this part triggers the destruction of the bottom part. End up. If so, the product itself contained in the packaging container may not be sold as a product even though there is no damage.

JP 2002-193239 A JP-A-10-297626 Japanese Patent No. 5372424

  The present invention has been made in view of the above circumstances, and is reduced in volume and volume of a quasi-rigid packaging container with high mechanical strength and durability that is not easily crushed by an external impact or the like. The purpose of the present invention is to provide a technique in which the perforation provided on the bottom surface of the packaging container is improved. Specifically, the bottom portion of the packaging container can be destroyed and easily flattened in a flat manner, and there is no risk of damaging the wound when the bottom portion is destroyed, and It is an object of the present invention to provide a packaging container having a fractured structure that does not cause unintentional destruction of the bottom surface.

  The packaging container having a fracture structure according to the present invention is a semi-rigid packaging container having a fragile portion that allows the bottom portion to be cleaved, and the fragile portion is provided in a non-linear shape so as to avoid the central region of the bottom portion. It is characterized by presenting.

In addition, the fragile portion may include a curved region formed from at least one arc, for example, two straight lines extending continuously from the one end side and the other end side of the curved region in the peripheral direction of the bottom surface portion, respectively. It can assume a mountain shape including a region.
Further, as the fragile portion, specifically, a breaking perforation formed so that the connecting portion is located at the top of the arc constituting the curved region can be used.

  Further, when the fragile portion is a breaking perforation having a mountain shape as described above, the breaking perforation is positioned at least at the top of the arc constituting the curved region in consideration of easiness of cleavage. The length of the connecting portion may be set shorter than the length of the other connecting portions. In addition, in consideration of the ease of further cleavage, the breaking perforation has three joints including a joint part located at the top of the arc constituting the curved region and two joint parts adjacent to this joint part. The length of the connecting portion may be set shorter than the length of the other connecting portions. Further, in the breaking perforation, depending on the size (length) of the curved area, the lengths of all the connecting parts constituting the curved area are set shorter than the lengths of the connecting parts in the linear area. It is good as a thing.

  Further, when the perforation for breaking that has a mountain shape as described above is used as the fragile portion, it is preferable that the cut portion on the end portion side in the linear region does not reach the peripheral edge of the bottom surface portion. It is more desirable that the cutting part on the part side is formed in an arc shape that bends away from the periphery.

  Further, in the present invention, when the bottom surface portion is provided with a perforation for breaking having a mountain shape as described above, it is visually or tactilely recognized in the vicinity of the joint portion located at the top of the arc constituting the curved region. It is desirable to have a mark that can be used.

Moreover, the packaging container which has the fracture | rupture structure which concerns on this invention shall make a bottom face part circular, an ellipse shape, or a polygonal shape.
In the packaging container having the bottom part having the shape as described above, the perforation for breaking according to the present invention may be provided in at least two places, and in this case, the weak part is provided in a symmetrical position. It is desirable to have it.

  Furthermore, when it is set as the packaging container whose shape of a bottom face part is a polygonal shape, it is desirable that a weak part should be provided so that the top part of the arc which comprises a curvilinear area may be located in the corner | angular part of a bottom face part.

  The packaging container in this invention is provided with the weak part which exhibits the nonlinear shape provided avoiding the center area | region of a bottom face part. Therefore, by pressing the vicinity of the non-linear fragile portion and applying stress, the fragile portion can be cleaved and the bottom surface portion can be easily broken. In addition, since the fragile portion has a non-linear shape, the bottom portion is broken while spreading in a plane when the fragile portion is cleaved, and the finger penetrating the bottom portion is the fragile portion at the broken bottom portion. There is also no risk of being wounded between the edges.

  Moreover, the fragile part is provided in the packaging container in this invention, without passing through the center area | region of a bottom face part. Therefore, when a packaging container is manufactured mechanically, even if air is sprayed toward the center area of the bottom surface of the packaging container, a part of the fragile part is cleaved because an impact or the like by air is not directly applied to the fragile part. There is no end to it.

  As described above, according to the present invention, in order to reduce the volume and reduce the volume of a quasi-rigid packaging container that is durable and highly durable and does not easily collapse due to external impact, etc. Of course, the bottom surface of the container can be easily crushed in a flat manner, and there is no risk of causing a wound when the bottom surface is broken. Thus, it is possible to provide a packaging container having a fractured structure that does not start to break.

It is a figure which shows the state by which the perforation for a fracture | rupture was provided in the bottom face part of the packaging container which concerns on this invention as an example of a weak part. It is a figure explaining the cut part and joint part in the perforation for a fracture | rupture shown by FIG. It is a figure explaining the length of the joint part in the perforation for a break provided in the bottom face part of the packaging container concerning the present invention. It is a figure explaining the length of the joint part in the other perforation for break provided in the bottom face part of the packaging container concerning the present invention. It is a figure which shows the other perforation for a break provided in the bottom face part of the packaging container which concerns on this invention. It is a figure which shows the other perforation for a break provided in the bottom face part of the packaging container which concerns on this invention. It is a schematic diagram explaining an example of the method of manufacturing the cylindrical body used for manufacture of the packaging container which concerns on this invention. It is a plane schematic diagram explaining the apparatus which manufactures the packaging container which concerns on this invention. It is a figure which shows the cylindrical body used for manufacture of the packaging container which concerns on this invention, and the bottom member used as a bottom face part. FIG. 9A is a side transparent view and FIG. 9B is a partial enlarged cross-sectional view of a joined portion showing a state where the cylindrical body and the bottom member shown in FIG. 9 are joined. FIG. 2A is a perspective view illustrating a state in which a breaking perforation provided on a bottom surface portion is broken, and FIG. 2B is a trigger for a breaking perforation for breaking. It is a perspective view which shows the state which destroyed the bottom view substantially entirely, (C) It is a perspective view which shows the state which flatly crushed the packaging container in which the bottom part was destroyed. It is a bottom view which shows the packaging container used for the test done in order to confirm the effect of the perforation for a break provided in the bottom face part of the packaging container which concerns on this invention. It is a figure which shows the other perforation for a fracture | rupture which can be provided in the bottom face part of the packaging container which concerns on this invention. It is a figure which shows the other perforation for a fracture | rupture which can be provided in the bottom face part of the packaging container which concerns on this invention.

Hereinafter, embodiments of a packaging container (hereinafter simply referred to as “packaging container”) having a fracture structure according to the present invention will be described with reference to the drawings.
Although the embodiments described below are preferred specific examples of the present invention, various technical limitations are applied. However, the scope of the present invention is described as being particularly limited in the following description. As long as it is not, it is not restricted to these forms.

  The packaging container of the present invention can accommodate, convey, store and display snack confectionery such as molded potato chips and corn chips, and protects the snack confectionery stored without being damaged by an external impact. This is a semi-rigid packaging container having such a mechanical strength that it can be used.

  The packaging container according to the present invention may be a paper material, a synthetic resin material, or a combination of both as long as it can be manufactured as a semi-rigid material, and the material is not particularly limited. . Therefore, for example, in addition to ordinary paper made from wood pulp, paper made from kenaf bamboo other than waste paper pulp or wood pulp, or synthetic paper coated with a thermoplastic resin on the surface of these paper, synthetic paper A resin sheet or the like can be freely selected and manufactured.

In addition, the packaging container according to the present invention can be manufactured by joining a cylindrical body serving as a peripheral body (side surface) part and a bottom member serving as a bottom part, and an appropriate material is used for the cylindrical body and the bottom member. It may be manufactured by changing the above.
Further, in the packaging container according to the present invention, the peripheral body portion (tubular body) may be manufactured using a single thick sheet material, or a plurality of types of base papers having different basis weights are overlapped ( It may be manufactured by layering).

In the present embodiment, a case where a fragile portion that can be cleaved is provided on the bottom surface portion of a packaging container having a cylindrical peripheral body portion will be described as an example.
As shown in FIG. 1, the packaging container 10 according to the present embodiment includes a fragile portion 15 having a non-linear shape on a circular bottom surface portion 12, and the fragile portion 15 avoids a central region of the bottom surface portion 12. It is characterized by being provided.

  The fragile portion 15 has a rupture structure that allows the bottom surface portion 12 to be easily cleaved. For example, the fragile portion 15 is a breaking sewing machine in which cutting portions 16 as cuts penetrating in the thickness direction of members constituting the bottom surface portion 12 and connecting portions 17 not provided with cuts are alternately formed. It is good as eyes. Further, the fragile portion 15 may be a streaky thin portion formed so as not to penetrate the members constituting the bottom surface portion 12.

  In this way, by providing the fragile portion 15 having a non-linear shape while avoiding the central region of the bottom surface portion 12, the destruction of the bottom surface portion 12 starting from the fragile portion 15 starts from the periphery of the bottom surface portion 12 toward the center. It spreads efficiently in a plane.

  In FIG. 1, the fracture | rupture part 15 in this Embodiment is respectively the curved area (alpha) formed from one arc, and the edge part 12a direction of the bottom face part 12 from the one end side and other end side of this curved area (alpha), respectively. Two linear regions β and β extending obliquely have a continuous mountain shape, and are shown as breaking perforations in which cut portions 16 and connecting portions 17 are alternately formed.

  As shown in FIG. 2, the breaking perforation 15 is preferably a breaking perforation formed so that the connecting portion 17α is positioned at the top of the arc constituting the curved area α. That is, it is important that the breaking perforation 15 formed on the bottom surface portion 12 is easily cleaved, but the crevice perforation 15 is not unintentionally cleaved by an external impact or stress when the packaging container 10 is handled. It is also important.

  However, as shown in FIG. 5, if there is a cutting portion 16α at the top of the arc constituting the curved region α in the breaking perforation having a mountain shape, the breaking perforation 15 is cleaved from the cutting portion 16α as a starting point. Is easy to start. If it does so, there exists a possibility that the perforation for a fracture | rupture may open | release unintentionally from this cutting | disconnection part 16 (alpha) by the impact and stress from the outside in the case of handling of the packaging container 10. FIG.

  Therefore, in the present embodiment, the position of the starting point to be cleaved at the breaking perforation 15 formed in the bottom surface portion 12 is examined, and the connecting portion 17α is positioned at the outward apex portion of the arc constituting the curved region α. A perforation 15 for breaking was provided.

  When the connecting portion 17α is positioned at the top of the arc constituting the curved region α in the breaking perforation 15 as described above, the strength of the starting point where the breaking of the breaking perforation 15 starts increases, and the unintended breaking sewing machine It can be controlled so that the eye 15 is not cleaved.

  In FIG. 2, the breaking perforation 15 includes a cutting portion constituting the curved region α as 16α, a connecting portion as 17α, a cutting portion constituting the linear region β as 16β, and the connecting portion as 17β. A connecting portion located between the curved area α and the linear area β is indicated by reference numeral 17. Accordingly, in FIG. 2, the breaking perforation 15 is formed so that the connecting portion 17α is located at the top of the arc constituting the curved region α, the cut portions 16α are formed on both sides thereof, and the cut portions 16α are continuous with each other. It is shown that the cut portions 16β and the joint portions 17β in the linear region β are formed so as to be alternately located via the joint portion 17.

  Note that the breaking perforations 15 shown in FIG. 2 are merely examples, and the number of connecting portions 16α and 16β and cutting portions 17α and 17β existing in the curved region α and the linear region β in the breaking perforations 15 are illustrated. It is not limited to that. Therefore, for example, if the arc constituting the curved region α is increased in the perforation 15 for breaking, the number of cutting portions 16α and connecting portions 17α existing in the curved region α is larger than the number shown in FIG. . Further, if the lengths of the cut portions and the joint portions in the breaking perforation 15 are reduced, the numbers of the joint portions 16α and 16β and the cut portions 17α and 17β existing in the curved region α and the straight region β are shown in FIG. More than the number shown.

  In the present embodiment, as shown in FIG. 3, the breaking perforation 15 is at least the length of the connecting portion 17α positioned at the top of the arc constituting the curved region α in consideration of easiness of cleavage. However, it should be set shorter than the length of the other connecting portions. That is, it can be said that the top of the arc constituting the curved region α in the breaking perforation 15 having a mountain shape is a position that can be a starting point where the breaking of the breaking perforation 15 starts. Therefore, the strength of this portion can be reduced by shortening the length of the connecting portion 17α existing at the starting position.

  Therefore, when the part at which the breaking perforation 15 starts to be the top of the arc constituting the curved region α, the joint 17α is provided at the top and the length of the joint 17α is set to the other joint. By making the length shorter than the length of the portion, the break perforation 15 is controlled so as to prevent unintended breakage perforation 15 from being generated as described above, and the strength of the joint portion 17α is weakened by a small stress (pressing force). Fifteen cleavages can be possible.

  3, the breaking perforation 15 is set such that the length L1 of the connecting portion 17α located at the top of the arc constituting the curved region α is shorter than the length L2 of the connecting portion 17β constituting the linear region β. (L1 <L2).

  In addition, the length of the connecting portion 17 located between the curved area α and the linear area β can be appropriately changed in design according to the ease of tearing of the perforation 15 for breaking. For example, when the cut portion 16α constituting the curved region α is long and easily cleaved, the length of the connecting portion 17 forms the curved region α in the same manner as the connecting portion 17β in the linear region β. It can be longer than the connecting portion 17α. On the other hand, when the cut portion 16α constituting the curved region α is short and difficult to be cleaved, the length of the connecting portion 17 is the same as that in the linear region β as in the connecting portion 17α constituting the curved region α. It can be shorter than the connecting portion 17β.

Therefore, in the present invention, as shown in FIG. 4, the breaking perforation 15 includes a connecting portion 17α positioned at the top of the arc constituting the curved region α, and two connecting portions 17, adjacent to the connecting portion 17α. The length of the three connecting portions including 17 may be set shorter than the length of the other connecting portions 17β.
Thereby, the ease of tearing of the perforation 15 for breakage can be enhanced, and the control of unintentional cleavage of the perforation 15 for breakage and the ease of tearing of the perforation 15 for breakage are achieved. It can be.

  In FIG. 4, the breaking perforation 15 includes a connecting portion 17α located at the top of the arc constituting the curved region α and a length L1 of the two connecting portions 17 and 17 adjacent to the connecting portion 17α. This is shown as a length (L1 <L2) set shorter than the length L2 of the connecting portion 17β.

Further, in the present invention, the breaking perforation 15 is not shown, but depending on the size of the arc constituting the curved region α, regardless of the connecting portion 17 located between the curved region α and the linear region β. The lengths of all the connecting portions constituting the curved region α may be set shorter than the lengths of the connecting portions in the linear region β.
This can also increase the ease of tearing of the breaking perforations 15, and control the unintentional cleavage of the breaking perforations 15 and the ease of tearing of the breaking perforations 15. Can do.

  Moreover, as shown in FIG.1 and FIG.2, the bottom face part 12 of the packaging container 10 which concerns on this invention has visuals, such as a character and a figure, in the vicinity of the connection part 17 (alpha) located in the top part of the arc which comprises curvilinear area (alpha). It is preferable that a mark 18 that can be recognized visually or tactilely such as unevenness is provided.

  This mark 18 is provided so that the pressing position for easily breaking the breaking perforation 15 with a small force can be seen. In FIGS. 1 and 2, the mark 18 is shown as a black star. ing. Therefore, by pressing this portion, the breaking perforation 15 is efficiently cleaved.

  Further, in the present invention, it is desirable that the breaking perforation 15 is such that the cut portion on the end side in the linear region β does not reach the periphery of the bottom surface portion. That is, as shown in FIG. 6, when the cutting part 16 e on the end side in the linear region reaches the peripheral edge 12 a of the bottom surface part 12, when stress such as impact is applied to the peripheral edge 12 a part of the packaging container 10, The force may be transmitted to the breaking perforation and unintentionally cleaved.

  Therefore, in the present invention, there is no cut portion between the perforation 15 for breaking and the peripheral edge 12a of the packaging container 10, so that a stress applied to the peripheral edge 12a portion of the packaging container 10 is provided for breaking by providing a buffer region. It can control so that it may not be transmitted to a perforation, and it can control that unintentional cleavage perforation 15 of a fracture is controlled.

  Further, in the present invention, the breaking perforation 15 is formed in an arc shape that bends so that the cut portion on the end side in the linear region β does not reach the peripheral edge of the bottom surface portion and is away from the peripheral edge of the bottom surface portion. Desirable. That is, as shown in FIG. 5, when the cutting portion 16 e on the end side in the linear region β is formed linearly toward the peripheral edge 12 a side of the bottom surface portion 12, when the perforation 15 for breaking is cleaved. The bottom surface portion 12 is broken along the extended line of the linear region β. If it does so, destruction of the bottom face part 12 by the cleavage by the perforation 15 for a fracture | rupture will reach the periphery 12a in the shortest, and the bottom face part 12 may not fully be destroyed.

  Therefore, in the present invention, when the cut portion 16e on the end side in the linear region β is formed in an arc shape that bends away from the peripheral edge 12a of the bottom surface portion 12, when the perforation 15 for breaking is cleaved, The portion 12 is broken so as not to reach the peripheral edge 12a immediately along the extension line of the cut portion 16e on the end side where the portion 12 bends in an arc shape, and the bottom surface portion 12 is efficiently broken in a plane. it can.

Next, the manufacturing method of the packaging container of this invention mentioned above is demonstrated.
The packaging container 10 of the present invention can be crushed by hand when discarded, and can be mechanically manufactured, for example, by the method described below.

First, the cylindrical body used as the surrounding trunk | drum 12 in the packaging container 10 is manufactured previously.
Specifically, for example, a cylindrical body can be manufactured using a winder apparatus schematically shown in FIG. In the winder device, a long cylindrical body 1A in which one end side and the other end side are both opened by winding a plurality of strip-like sheet members in a spiral shape around a fixed mandrel (metal roll) WM. To manufacture. Then, the long cylindrical body 1A is pulled out from the mandrel WM and cut into a predetermined length, whereby the individual cylindrical body 1 as shown in FIG. 9 is obtained.

  FIG. 7 schematically shows a state in which the long cylindrical body 1A is manufactured by winding four belt-like sheet members 1a, 1b, 1c, and 1d in a spiral manner around the mandrel WM.

On the other hand, the bottom member 2 in the packaging container 10 is separately manufactured in advance.
As shown in FIG. 9, the bottom member 2 has the same shape as the bottom side opening 1b of the cylindrical body 1, and is formed slightly larger by the folding width 2w that can be joined to the bottom side opening 1b. ing.

  The bottom member 2 is formed by punching a sheet member. For example, the bottom member 2 is formed immediately before joining the tubular body 1 and the bottom member 2 using a bottomer device as shown in FIG. Can be stamped and molded. In this bottomer device, the mandrel BM rotates in the direction indicated by the arrow in the figure, and the cylindrical body 1 and the bottom member 2 are continuously joined through each step while rotating and moving. It is supposed to be. Therefore, the bottom member 2 can be punched and the tubular body 1 and the bottom member 2 can be joined in series using the bottomer device.

The steps in the bottomer apparatus shown in FIG. 8 will be specifically described. First, in the first station in the bottomer apparatus, the cylindrical body 1 is inserted into and supported by the mandrel BM.
Next, in the moved second station, the separately supplied sheet member is punched to form the bottom member 2, and at the same time, the punched bottom member 2 is moved to the tip of the mandrel BM (that is, the bottom side opening 1b of the tubular body 1). At the edge).

Here, the sheet member is preliminarily formed with a perforation for breakage. When the sheet member is punched, it has the same shape as the bottom side opening 1b of the cylindrical body 1 and is folded from the bottom side opening 1b. The perforation 15 for breakage is a little larger by the width 2w and is not positioned in the central region of the bottom surface portion 12.
Note that the punched bottom member 2 can be maintained in the state of being arranged at the edge of the bottom side opening 1b of the tubular body 1 by sucking from the inside of the mandrel BM.

  Subsequently, in the fourth station where one is skipped, the surface of the bottom member 2 is heated and the previously applied adhesive is melted. That is, the surface of the sheet member from which the bottom member 2 is punched is preliminarily coated with a meltable adhesive synthetic resin such as polyethylene (PE).

Further, in the next fifth station, a crease is formed for folding into the edge of the bottom side opening 1b of the cylindrical body 1, and the edge of the bottom side opening 1b of the cylindrical body 1 and the folding width 2w portion of the bottom member 2 Fold together.
Subsequently, in the sixth station, the folded tubular body 1 and the bottom member 2 are pressure-bonded and joined. Thereby, the packaging container 10 which concerns on this invention is manufactured.
In addition, the state of the joined cylindrical body 1 and the bottom member 2 can be shown, for example in FIG.

  In FIG. 10, the edge part of the bottom side opening 1b of the cylindrical body 1 is shown as what was folded inward from the outer side, and joined so that the folding width 2w part of the bottom member 2 might be wound.

  Then, in the last eighth station, which has been skipped, while the air is blown from the inside of the mandrel BM toward the center region of the bottom surface portion 12 as indicated by the white arrow in the figure, the manufactured packaging container 10 is Pull out from mandrel BM.

  In the above-described bottomer device, it has been described that the perforation for breaking is punched by using a sheet member formed in advance. However, the bottom is formed by punching the sheet member by forming the perforation for breaking at any station. The process from the molding of the member 2 to the joining of the tubular body 1 and the bottom member 2 may be performed in series.

Next, the case where the manufactured packaging container 10 of the present invention is discarded will be described.
First, the packaging container 10 that is no longer needed is turned upside down, and a finger is attached to the mark 18 provided near the breaking perforation 15 formed on the bottom surface portion 12 so as to move downward (inward) from above (outward). Apply a load to push it in. Then, as shown in FIG. 11 (A), the bottom surface portion 12 is easily broken along the breaking perforations 15 to be slightly opened.

Subsequently, pushing in the vicinity of the breaking perforations 15 is continued to tear all the breaking perforations 15 and push the bottom surface portion 12 further. Then, as shown in FIG. 11 (B), the bottom surface portion 12 is broken almost entirely.
After that, by pressing the peripheral body portion 11 of the packaging container 10 in the direction of the white arrow in the figure, the packaging container is easily flattened and reduced in volume and volume as shown in FIG. You can plan.

  As described above, according to the present invention, by providing the weakened portion (perforation line for breakage) that exhibits a non-linear shape while avoiding the central region of the bottom surface portion of the packaging container, the product accommodated even by an external impact or the like However, it is possible to efficiently and easily perform the volume reduction operation of the semi-rigid packaging container formed of a strong, durable and high mechanical strength member that is not easily damaged.

In addition, in this Embodiment mentioned above, the thing which provided the perforation for a fracture | rupture which exhibits a mountain shape as a weak part avoiding the center area | region in the bottom face part of the cylindrical packaging container with which the bottom face part was circular was demonstrated. However, the present invention is not limited to this.
Therefore, in the present invention, as the fragile portion exhibiting a non-linear shape, for example, as shown in FIG. 12 (B), a curved area formed from one arc, and one end side and the other end side of the curved area. It is good also as what provided the perforation for a fracture | rupture which exhibits the umbrella-shaped shape containing two linear areas which each extend in the peripheral direction diagonally avoiding the center area | region of a bottom face part. Further, as shown in FIG. 12C, a breaking perforation having an arc shape formed of a curved region formed from one arc may be provided while avoiding the central region of the bottom surface.

In the present invention, the fragile portion having a non-linear shape may be formed from two arcs in which curved regions are continuous. Such a weak part can be shown, for example in FIG.
In FIG. 13, as the fragile portion, a curved area α formed from two continuous arcs, and two straight lines extending from the one end side and the other end side of the curved area α toward the edge 12 a of the bottom surface portion 12. The packaging container 20 provided with the perforation 25 for a fracture | rupture which exhibits the shape of a two-prongs (Futa-kobu) mountain shape where shape-like area (beta) and (beta) continue is shown.

  In this way, if the fragile part has a bifurcated mountain shape, the top part of the arc constituting the curved region that becomes the part where the fragile part starts to be split becomes two places, and the bottom part can be efficiently destroyed. Can do. That is, in the case of cleaving the fragile portion having such a bifurcated mountain shape, for example, the bottom portion of the packaging container is directed to the front and the peripheral body portion is wrapped with both palms. Then, one thumb is attached to the mark 18 provided in the vicinity of the one arc in the fragile portion, and the other thumb is attached to the mark 18 provided in the vicinity of the other arc in the fragile portion. Thereby, a weak part can be easily cleaved and a bottom face part can be destroyed efficiently.

  In the present invention, the fragile portion having a non-linear shape is provided in at least two places avoiding the central region of the bottom surface portion, or the fragile portions provided in two locations avoiding the central region of the bottom surface portion. It is good also as what is provided in the symmetrical position.

  By providing at least two or more weak parts in the present invention, the bottom part can be efficiently destroyed even in a packaging container having a large bottom part. In addition, when the fragile portion is provided at a symmetrical position, it is possible to easily perform a volume reduction operation that flatly crushes the packaging container.

  In addition, the bottom portion of the packaging container having a polygonal bottom surface is provided with a weak portion having a chevron shape, or the top of the arc constituting the curved region in the weak portion is at the corner of the bottom portion. It may be located. FIG. 14 shows, for example, that the bottom surface has a polygonal shape, and the top of the arc constituting the curved region in the fragile portion is located at the corner of the bottom surface.

  In FIG. 14, the bottom surface portion 32 has a rectangular shape with rounded corners, and a packaging container 30 provided with two breaking perforations 35A and 35B having a chevron shape as a fragile portion is shown. In the packaging container 30, the first breaking perforation 35 </ b> A is located at the top left corner of the arc constituting the curved area, and the second breaking perforation 35 </ b> B constitutes the curved area. It is shown that the breaking perforations 35A and 35B provided at two places are provided at symmetrical positions by the top of the arc being located at the lower right corner.

  Thus, even in a packaging container having a polygonal bottom portion, the fragile portion can be easily cleaved and the bottom portion can be efficiently destroyed. In addition, by providing the fragile parts at two symmetrical positions, even if the packaging container has a large bottom part, the bottom part can be efficiently destroyed, and the volume reduction operation that flatly crushes the packaging container can be easily performed. Can do.

Next, in order to describe the structure of the packaging container according to the present invention in more detail, an example will be shown and described in detail.
First, in order to confirm that it is desirable to provide a fragile part that exhibits a non-linear shape avoiding the central region of the bottom part, to form a break perforation that exhibits various shapes on the bottom part of the packaging container as the fragile part, The force required to cleave the breaking perforation was measured.

The packaging container used for the measurement has a cylindrical shape with a diameter of about 70 mm and a length of 150 mm, and the cylindrical body 1 part is manufactured by winding four types of belt-like sheets having different basis weights in a spiral shape. . The bottom surface portion 12 was formed using a bottom material having a basis weight of 210 g / m ² in which polyethylene was previously applied to the surface of the base paper.

In addition, the shape of the perforation for fracture that was measured is as shown in FIG.
In Example 1, the breaking perforations exhibiting the chevron shape described in various embodiments of the invention are provided avoiding the central region of the bottom surface (see FIG. 12A). In the second embodiment, the perforation for break having an umbrella shape is provided to avoid the central region of the bottom surface (see FIG. 12B). In Example 3, a breaking perforation having an arc shape is provided avoiding the central region of the bottom surface (see FIG. 12C).

In addition, as Comparative Example 1, a rupture exhibiting a straw hat shape including a curved region formed from one arc and two linear regions respectively extending in a lateral direction from one end side and the other end side of the curved region. The same measurement was performed on a product having a perforation provided in the central region of the bottom surface (see FIG. 12D). Furthermore, as a comparative example 2, a blank test was performed for a sample having no perforation for breaking on the bottom surface (see FIG. 12E).
Note that each of the breaking perforations shown in (A) to (D) has a cut portion length of 6.5 mm and a joint portion length of 2.0 mm.

  Moreover, since no suitable measuring device was found in the measuring method, the packaging container manufactured on the digital platform scale (manufactured by Daiwa Seikan Co., Ltd .: DP6700) was placed upside down and placed, and from FIG. ) Is a simple means for measuring the value of the load applied to the digital platform scale as the strength of the breaking perforation until the breaking perforation is cleaved by pressing the part indicated by the black circle little by little. It went by. And the average value which performed this measurement 10 times is set as a result, and the following [Table 1] is shown with the evaluation.

  In addition, since the value in the blank test (Comparative Example 2) was 12.0 Kg, in order to be able to easily cleave the bottom surface part, at least a half (6.0 kg) of cleavage is required. If it is not possible, it is not desirable. On the other hand, if it is to be cleaved with a force of less than one third (2.0 kg), it has been determined that there is a risk of unintentional cleaving due to external impacts, etc. Is based.

  Therefore, the evaluation is “X” because the material that has been cleaved at less than 2.0 kg may be unintentionally cleaved, and the material that has been cleaved at 2.0 kg or more but less than 6.0 kg may be cleaved unintentionally. The evaluation was “◯” as it was easy to cleave, and those that could not be cleaved unless it was 6.0 kg or more were shown as “x” because it was difficult to cleave.

From the results of [Table 1], in each of Examples 1 to 3 in which the perforation for breaking having a non-linear shape is provided avoiding the central region of the bottom portion, the strength as the fragile portion is appropriate. It was confirmed that there was no risk of unintentional cleavage due to impact or the like, and it was easy to cleave. Among them, it was found that the perforation for break having the umbrella shape of Example 2 is most desirable.
On the other hand, it was found that Comparative Example 1 in which the breaking perforation having a non-linear shape was provided in the center region of the bottom portion had a low strength as a fragile portion as expected and could be unintentionally cleaved.

Subsequently, the value obtained when the packaging container obtained by cleaving the breaking perforation of Examples 1 to 3 in which the desired result was obtained as the fragile portion was pressed from the direction B and the direction B shown in FIG. Was measured. And the average value which performed this measurement 10 times is set as a result, and the following [Table 2] is shown with the evaluation.
For reference, the same measurement was performed on the packaging container of Comparative Example 2 having no break perforation. However, in Comparative Example 2, the crushing direction is irrelevant. Therefore, only the measurement of pressing from the direction B shown in FIG.

  From the results of [Table 2], it was confirmed that the packaging container can be easily crushed by cleaving the breaking perforation regardless of the shape of the breaking perforation.

  Next, among Examples 1 to 3 that obtained favorable results in the above evaluation, the crevice perforation having the chevron shape of Example 1 in which the strength as the fragile portion was intermediate was used for further cleavage. Various considerations were made on how to make it easier. The reason for further study using the perforation for breaking having a chevron shape here is that if the perforation for breaking having a chevron shape that was intermediate in strength as the weakened portion gives good results, This is because it is presumed that the same result can be obtained even in the perforation for breaking having the shape, and it can be easily diverted.

First, the length of the connecting portion in the perforation for breaking was examined. That is, in Example 1 above, the length of the connecting portion was 2.0 mm, but it was confirmed how much it could be shortened to make it easier to cleave.
Therefore, based on the length of the connecting portion in Example 1 above, the same measurement was performed by gradually shortening the length. Specifically, Example 4 is a perforation for breakage having a mountain shape with a joint portion length of 1.8 mm, and Example 5 is a mountain with a joint portion length of 1.5 mm. It is the perforation for a fracture | rupture which exhibits a mold shape. In addition, about the case where the length of a connection part was 1.5 mm or less, it judged that there exists a possibility of tearing unintentionally and was not implemented. The measurement results are shown in the following [Table 3] together with the evaluation.

  From the results of [Table 3], it was found that if the length of the connecting portion is 1.8 mm, the perforation for fracture is considerably easier to cleave than in the case of 2.0 mm. In addition, when the length of the joint portion is 1.8 mm, the measured value is 2.9 kg, which is significantly lower than the measured value of 4.1 kg when the joint portion is 2.0 mm. If the length is 1.5 mm, it is presumed that the risk of unintentional cleavage will increase significantly. As a result of actually measuring the case where the length of the joint portion is 1.5 mm, the perforation for breaking can be cleaved with a considerably small force of 0.8 kg, and the risk of unintentional cleaving is significantly increased. In addition, it has been found that it is desirable that the length of the connecting portion is about 1.8 mm in the perforation for breaking.

  Next, using a break perforation (Example 4) having a length of 1.8 mm, which has obtained a preferable result, the joint is formed so as to be positioned at the top of the arc constituting the curved region. The same measurement was performed to confirm that it was desirable. The measurement results are shown in the following [Table 4] together with the evaluation.

  From the results of [Table 4], it can be confirmed that it is preferable to form the connecting portion so as to be located at the top of the arc constituting the curved region, and there is no connecting portion at the top of the arc constituting the curved region. It has been found that the cleavage strength of the perforation perforation is significantly reduced as compared with the case where there is a joint, and there is a risk of unintentional cleavage. Further, from this result, it is estimated that the same result can be obtained even when the length of the connecting portion is 2.0 mm.

Next, from Example 4 above, it was found that by setting the length of the joint portion to 1.8 mm, it was easier to cleave compared to the case of 2.0 mm, but the length of the joint portion was 2.0 mm. In this case, the case of making it easier to cleave was examined.
Therefore, in the perforation for breaking having a mountain shape, it is desirable that the length of the connecting portion located at the top of the arc constituting the curved region is shorter than the length of the other connecting portions. The same measurement was performed and confirmed. Specifically, Example 7 is a perforation for breakage having a chevron shape in which the length of the joint portion located at the top of the arc is 1.5 mm and the length of the other joint portion is 2.0 mm. Yes, Example 8 is a breaking perforation having a chevron shape in which the length of the joint portion located at the top of the arc is 1.0 mm and the length of the other joint portion is 2.0 mm. The measurement results are shown in the following [Table 5] together with the evaluation.
In addition, about the case where the length of the connection part located in the top part of an arc shall be 1.0 mm or less, it judged that there exists a possibility of unintentionally cleaving, and was not implemented.

  From the results of [Table 5], when the length of the joint in the perforation for break is 2.0 mm, the length of the joint located at the top of the arc is preferably either 1.5 mm or 1.0 mm. It has been found that the perforation for breaking can be easily cleaved as compared with the case where the length of the joint portion is 2.0 mm. In particular, it has been found that when the length of the connecting portion located at the top of the arc is 1.0 mm, it can be considerably easily cleaved. In addition, since the measured value when the length of the top joint portion is 1.0 mm is 2.5 kg, when the length of the top joint portion is 1.0 mm or less, the risk of unintentional cleavage increases. It is guessed that it becomes.

Finally, from Example 8 above, when the length of the joint in the breaking perforation is 2.0 mm, the length of the joint located at the top of the arc is 1.0 mm, so that the breaking perforation It has been found that it can be considerably easy to cleave, but the case where the cleaving is made easier when the length of the joint located at the top of the arc is 1.5 mm was examined.
Therefore, in the breaking perforation having a chevron shape, the length of the three joint parts including the joint part located at the top of the arc constituting the curved region and the two joint parts adjacent to the joint part is defined. The same measurement was performed to confirm that it is preferable to shorten the length of the other connecting portions. Specifically, in Example 9, the length of three joint parts including a joint part located at the top of an arc constituting the curved region and two joint parts adjacent to the joint part is 1.5 mm. And a perforation for breakage having a mountain shape in which the length of the other connecting portion is 2.0 mm. The measurement results are shown in the following [Table 6] together with the evaluation.

  From the results of [Table 6], in the breaking perforation exhibiting a chevron shape, three parts including a joint part located at the top of the arc constituting the curved region and two joint parts adjacent to the joint part are included. When the length of the joints is 1.5 mm and the length of the other joints is 2.0 mm, the length of all the joints is 1.8 mm, or the arc constituting the curved area Compared to the case where the length of only the joint portion located at the top of the joint is 1.5 mm or 1.0 mm and the length of the other joint portion is 2.0 mm, the perforation for breaking can be most easily cleaved. It turns out to be desirable.

  α curved region, β linear region, 1 cylindrical body, 1b bottom side opening, 2 bottom member, 2w folding width, 10, 20, 30 packaging container, 11 collecting portion, 12 low surface portion, 12a peripheral edge, 15, 25, 35A, 35B Perforation for break (fragile portion), 16, 16e, 16α, 16β cutting portion, 17, 17α, 17β connecting portion, 18 mark.

Claims (15)

A quasi-rigid packaging container having a fragile portion that allows the bottom portion to be cleaved,
The fragile portion has a non-linear shape provided so as to avoid the central region of the bottom portion, and a packaging container having a rupture structure.   The packaging container having a fracture structure according to claim 1, wherein the fragile portion includes a curved area formed from at least one arc.   The fragile portion has a mountain shape including two linear regions extending continuously from one end side and the other end side of the curved region in the peripheral direction of the bottom surface portion, respectively. A packaging container having the fracture structure according to 2.   4. The packaging container having a breaking structure according to claim 3, wherein the weakened portion is a breaking perforation formed so that a joint portion is positioned at a top portion of an arc constituting the curved region.   5. The breaking structure according to claim 4, wherein the breaking perforation has a length of a connecting portion located at least at a top portion of an arc constituting the curved region, which is shorter than a length of another connecting portion. Having a packaging container.   The breaking perforation has a length of three joint parts including a joint part located at the top of the arc constituting the curved region and two joint parts adjacent to the joint part. The packaging container having a fracture structure according to claim 4, wherein the packaging container is shorter than the length of the packaging container.   5. The packaging having a fracture structure according to claim 4, wherein the break perforation has a length of all joint portions constituting the curved region shorter than a length of joint portions in the linear region. container.   The breaking structure according to any one of claims 4 to 7, wherein the breaking perforation has a cut portion on an end portion side in the linear region that does not reach a peripheral edge of a bottom surface portion. Having a packaging container.   The packaging container having a fracture structure according to claim 8, wherein the cut portion on the end side is formed in an arc shape that bends away from the periphery.   The said bottom face part is provided with the mark which can be recognized visually or tactilely in the vicinity of the connection part located in the said top part, The any one of Claim 4 to 9 characterized by the above-mentioned. A packaging container having the breaking structure described.   The packaging container having a fracture structure according to any one of claims 1 to 10, wherein the bottom portion is circular or elliptical.   The packaging container having a fracture structure according to any one of claims 1 to 10, wherein the bottom surface has a polygonal shape.   The packaging container having a fracture structure according to any one of claims 1 to 12, wherein the fragile portion is provided in at least two places.   The packaging container having a fracture structure according to claim 13, wherein the fragile portion is provided at a symmetrical position.   The said weak part is provided so that the top part of the arc which comprises the said curvilinear area may be located in the corner | angular part of a bottom face part, The any one of Claims 12-14 characterized by the above-mentioned. A packaging container having a fracture structure.

Images