JP2009154897A - Self-standing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-standing bag which enables a breaking stress for unsealing to be easily concentrated to a part of an easily breaking part provided at a spout forming part, to perform more smoothly breaking, and a spout to be more easily formed. <P>SOLUTION: The self-standing bag 10 is formed by molding a bag body 11 made of a synthetic resin consisting of a bottom part 14 and a body part 12 equipped with the spout forming part 13 in a mold, and forms the spout by removing a predetermined part 16 to be cut by breaking the easily breaking part 15 of the spout forming part 13. The spout forming part 13 is provided to be protruded from the body part 12 in a upward direction X perpendicular to a placing plane P1 of the bottom part 14. The easily breaking part 15 is formed along a face P3 inclined to the face P2 in parallel to the placing face P1. On the predetermined part 16 to be cut of the spout forming part 13, a knob piece 17 is integrally formed and fixed so as to be close to the highest position of the easily breaking part 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a self-supporting bag formed by molding a synthetic resin bag body including a bottom portion and a trunk portion including a spout forming portion.

  2. Description of the Related Art Conventionally, a self-supporting bag that is formed by die molding such as blow molding and includes a bottom portion and a trunk portion that includes a spout forming portion and can be placed on a placement surface with the bottom portion as a placement surface is known. It has been. In these self-supporting bags, the sealed contents are cut out at the spout forming part to form a spout and the contents are poured out.

In this case, it is troublesome to perform the operation of cutting the spout forming portion with a knife or scissors, which is troublesome for an unfamiliar user. For this reason, the spout forming portion is provided with an annular easily breakable portion by a thin cut portion or a narrow groove-shaped recess and a knob piece, and the easy breakable portion is broken by an operation of tearing or tearing. Blow molded containers that can easily perform the operation of forming the outlet are disclosed (see, for example, Patent Document 1 and Patent Document 2).
JP-A-9-183457 JP 2004-59141 A

  In the blow-molded containers described in Patent Document 1 and Patent Document 2, the easy-to-break portions due to the thin-walled cut portions and the narrow groove-shaped concave portions are both formed in an annular shape along a plane parallel to the placement surface by the bottom portion. For this reason, the user is easily guided to twist the spout formation portion along a plane parallel to the placement surface. In such a twisting operation, the stress for breaking is applied to the entire thin cut portion and the annular groove, and depending on the material of the container and the thickness of the thin portion of the easily breakable portion, it becomes difficult to break, It may be difficult to form the spout.

  Moreover, in the blow-molded container described in Patent Document 1 or Patent Document 2, the direction in which the knob piece is operated is clearly indicated, and a device for concentrating the stress applied to the easily breakable portion on the portion provided with the knob piece is also made. In addition, since the impression that the easily breakable portion extends along a plane parallel to the placement surface is strong, the user is also easily guided to twist the spout forming portion.

  The present invention makes it possible to easily concentrate the breaking stress for opening to a part of the easily breakable portion provided in the spout forming portion, to break it more smoothly, and to form the spout more easily. The purpose is to provide a bag.

  In the present invention, a bag body made of a synthetic resin including a bottom portion and a trunk portion having a spout forming portion is molded, and a portion to be excised is removed by breaking the easily breakable portion of the spout forming portion. A self-supporting bag that forms a spout, wherein the spout forming part is provided to protrude from the body part in an upward direction substantially perpendicular to the mounting surface by the bottom part, and the easily breakable part is The above object is achieved by providing a self-supporting bag formed along a plane inclined with respect to a plane parallel to the placement surface.

  According to the self-supporting bag of the present invention, it is easy to concentrate the breaking stress for opening on a part of the easily breakable portion provided in the spout forming portion at the time of opening. Moreover, since the operation | movement which pulls up a knob piece upwards is easy to be induced when a knob piece is provided, it can be broken more smoothly and a spout can be more easily formed in a spout formation part.

  A self-supporting bag 10 according to a preferred embodiment of the present invention shown in FIGS. 1 (a) and 1 (b) is formed by blow molding such as direct blow molding or injection blow molding as mold molding. In addition, the self-supporting bag 10 of the present embodiment stores, for example, a liquid agent, in particular, a hair cleaning agent, a whole body cleaning agent, a liquid detergent, a cleaning agent, or the like as contents, and is opened and used in other containers. Used as a refill bag container for refilling things. Furthermore, the self-standing bag 10 of the present embodiment can easily and smoothly perform an operation of cutting a part of the spout forming portion 13 provided so as to protrude from the body portion 12 of the bag main body 11 to form a spout. To.

  The self-supporting bag 10 of this embodiment is formed by molding a synthetic resin bag body 11 including a bottom portion 14 and a trunk portion 12 having a spout forming portion 13, and the spout forming portion 13 is easily broken. It is a bag container which forms a spout by removing the part to be cut 16 at the tip region from the easily breakable part 15 by breaking the part 15, and the spout forming part 13 is located on the mounting surface P <b> 1 by the bottom part 14. And projecting from the body 12 toward the vertical or substantially vertical upward direction (the vertical upward direction when placed on the horizontal surface with the bottom portion 14 down). As shown also in 2, it is formed along the surface P3 which inclines with respect to the surface P2 parallel to the mounting surface P1. The spout forming portion 13 has a central axis of the spout forming portion 13 formed along the vertical line X. For example, as can be seen from FIG. When viewed, the shape is substantially symmetric with respect to the vertical line X passing through the center.

  Moreover, in this embodiment, the knob piece 17 is provided as a knob part in the excision scheduled part 16 of the spout formation part 13. The knob piece 17 is adjacent to the highest position of the easily breakable portion 15 formed along the surface P3 that is inclined with respect to the surface P2 parallel to the placement surface P1, and continues only to the excision scheduled portion 16, and easily It extends across the rupture portion 15 to the base 20 of the spout formation portion 13 and is integrally provided on the outer peripheral surface of the planned cutting portion 16. That is, the knob piece 17 is integrally formed with the planned cutting portion 16 when the self-supporting bag 10 is formed. And the knob piece 17 of this embodiment is formed in the flat form provided with the surface substantially orthogonal to the surface P2 parallel to the mounting surface P1.

  In the present embodiment, the bag body 11 made of synthetic resin is preferably formed by blow molding into a shape including a bottom portion 14 and a trunk portion 12 including a spout forming portion 13. As the blow molding, various known molding methods such as direct blow molding and injection blow molding can be employed.

  Moreover, as a synthetic resin material for forming the bag body 11, a soft synthetic resin such as a polyolefin resin such as LDPE (low density polyethylene), L-LDPE (linear low density polyethylene), OPP (stretched polypropylene), etc. A resin material or polyester resin such as PET (polyethylene terephthalate) can be used as a single layer. A laminated resin of these synthetic resins and other synthetic resins can also be employed. For example, a laminated resin in which LDPE or L-LDPE is used as the inner layer and the outer layer is used as HDPE can be employed. Also, EVOH resin (ethylene vinyl alcohol copolymer resin), EVA resin (ethylene vinyl acetate copolymer resin), a resin laminated with nylon resin, etc., and a resin such as EVA, EVOH, nylon, etc. with a resin such as PE (polyethylene) A blended resin can also be employed.

  In the present embodiment, the bag body 11 is formed by blow molding using the synthetic resin material described above, and the front surface portion of the bag body 11 passes through the mold parting line 18 in a cross section in which the body portion 12 crosses the body portion. The side edge of 12A and the side edge of the back surface portion 12B are continuous, have a flat shape with a wide front view and a back view and a narrow side view, and have a rectangular hollow cross-sectional shape with an ellipse or a rounded corner. Further, the lower end edge of the body portion 12 is joined to the bottom portion 14, and the upper portion thereof gradually decreases in diameter as a shoulder portion 19, and protrudes upward from the central portion of the shoulder portion 19 with the spout forming portion 13 serving as a neck portion. It has a shape.

  Here, it is preferable that the trunk | drum 12 and the bottom part 14 of the bag main body 11 made from a synthetic resin are shape | molded by the thickness of 100 micrometers or more so that stable independence can be ensured. In addition, it has moderate flexibility and can be crushed, folded or bent, and formed into a thin wall having a thickness of, for example, 700 μm or less, more preferably 500 μm or less, so that it can be made almost flat. It is preferred that

  In the present embodiment, the spout forming portion 13 protruding upward from the central portion of the shoulder portion 19 of the trunk portion 12 has a closed upper end surface preferably curved in a dome shape, for example, gradually tapering toward the tip. It has a hollow, substantially truncated cone shape. The spout forming portion 13 is provided so as to protrude upward from the shoulder portion 19 of the trunk portion 12 with its central axis directed in a direction X perpendicular to the placement surface P1.

  Further, in the present embodiment, the spout forming portion 13 is formed by the easily breakable portion 15 formed of a narrow groove-like concave portion formed so as to be annularly formed along the outer peripheral surface of the spout forming portion 13 and the base portion 20 below this, It is divided into an upper part to be excised 16. A spout is formed by separating the planned cutting portion 16 in the distal end region from the base 20 rather than the easily breakable portion 15, and the self-standing bag 10 is released from the sealed state.

  Here, the narrow groove-like concave portion constituting the easily breakable portion 15 is formed by a narrow groove having a substantially V-shaped cross-sectional shape, for example. The deepest part of the narrow groove-shaped recess or the tangential part where the two surfaces forming the groove intersect is preferably thin so that it can be easily broken. The cross-sectional shape surrounded by the easily breakable portion 15 is, for example, an elliptical shape, preferably a ginkgo shape or a teardrop shape (see FIGS. 4A and 4B), and the length of the diameter of the perfect circle is one direction or two directions. If the longest part is provided, the stress tends to concentrate on the longest part. In addition, as shown in FIG. 4C, by making the half of the cross-sectional shape a semicircular shape and the other half is a square shape with a rounded corner, stress is easily concentrated at the corner.

  Further, the easily breakable portion 15 is formed along a surface P3 inclined with respect to the surface P2 parallel to the placement surface P1, and an inclination angle θ of the inclined surface P3 with respect to the surface P2 parallel to the placement surface P1. Is preferably 5 to 45 °, for example. When the inclination angle θ is too large, the breaking distance becomes long, and there is a region where the angle formed by the groove and the wall surface of the spout forming portion 13 is an acute angle, making it difficult to mold the easily breakable portion 15. If the inclination angle θ is too small, the fracture surface surrounded by the easily breakable portion 15 becomes nearly horizontal, so that it is easy to guide the operation of twisting the spout forming portion in the horizontal direction. As a whole, it receives a twisting force, and the stress for breaking is dispersed, making it difficult to open. That is, when the inclination angle θ is 5 to 45 °, it is easy to concentrate the stress for opening on a part of the easily breakable portion 15, it is easy to recall the upward pulling operation, and the upward pulling operation is performed. Easy to guide.

  In the present embodiment, the knob piece 17 attached as a knob portion to the excision scheduled portion 16 of the spout forming portion 13 is plate-shaped and is generally orthogonal to the plane P2 parallel to the placement surface P1 and is scheduled to be excised. The peripheral portion extends in a semicircular shape continuously with the portion 16 and is integrally formed. That is, the knob piece 17 is not continuous with the base portion 20 of the spout forming portion 13, but extends to the base portion 20 with a space therebetween, and is formed integrally with only the planned cutting portion 16. That is, in the present embodiment, the knob piece 17 is provided to extend outward from the outer peripheral surface of the spout forming portion 13, extending to the base portion 20 across the easy-to-break portion 15, continuously with the planned cutting portion 16. ing. In the present embodiment, the knob piece 17 is provided along the parting line 18 of the mold. In the present embodiment, the surface P3 inclined with respect to the surface P2 parallel to the placement surface P1 is inclined at an inclination angle θ in the direction along the parting line 18. Accordingly, the knob piece 17 is formed so as to protrude from the parting line 18 along the parting line 18 and extend upward and laterally, and is located at the highest position of the easily breakable portion 15 on the surface including the parting line 18. It is formed in close proximity.

  In this embodiment, an anti-slip ridge portion 21 is provided on the peripheral portion of the knob piece 17, and it is easy to perform an operation of grasping the knob piece 17 with fingers and opening the spout forming portion 13. ing. In addition, by forming an uneven surface or a rough surface by embossing or the like on the inner side of the peripheral portion of the knob piece 17, the gripping property of the knob piece 17 can be further improved.

  And according to the self-standing bag 10 of the present embodiment having the above-described configuration, it is easy to concentrate stress for breaking for opening on a part of the easily breakable portion 15 provided in the spout forming portion 13, By making the easily breakable portion 15 break more smoothly, the spout can be more easily formed in the spout forming portion.

  That is, according to the present embodiment, the spout forming portion 13 is provided to protrude from the body portion 12 in the direction X perpendicular to the placement surface P1 by the bottom portion 14, and the easily breakable portion 15 is Since it is formed along the surface P3 that is inclined with respect to the surface P2 parallel to the placement surface P1, it is difficult for the user to perform an operation of twisting the spout forming portion 13 in a direction parallel to the placement surface P1. . Even if the twisting operation is performed, for example, stress is concentrated at the highest position or the lower position of the easily breakable portion 15, and the stress for breaking is concentrated on a part of the easily breakable portion 15. 15 can be broken smoothly and a spout (opening) can be easily formed.

  Moreover, in this embodiment, since the knob piece 17 is integrally provided on the outer peripheral surface of the scheduled cutting portion 16 in the vicinity of the highest position of the easily breakable portion 15, the user sets the spout forming portion 13. Rather than twisting, it is easy to be guided to grip and lift the knob piece 17 upward. Furthermore, the stress applied at the time of opening is easily broken both in the case of gripping and lifting the knob piece 17 and in the case of performing the operation of twisting the spout forming portion 13 via the knob piece 17. Since it concentrates on the highest part of the part 15, it becomes possible to fracture | rupture the easily breakable part 15 still more smoothly.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, it is not always necessary to provide a knob portion in the planned cutting portion of the spout forming portion, and the knob portion may be employed in various other shapes such as a ring-shaped knob portion in addition to a plate-like knob piece. Can do. Further, the knob portion (knob piece 17) can be provided at any position in the circumferential direction of the excision scheduled portion 16, but preferably, as shown in FIG. 3, with respect to a surface P2 parallel to the placement surface P1. It can also be provided integrally with the outer peripheral surface of the planned cutting portion 16 in the vicinity of the lowest position of the easily breakable portion 15 formed along the inclined surface P3. Further, the knob portion (knob piece 17) is provided with an arrow 22 or the like that clearly indicates the direction in which the knob portion is operated, and the user is guided to operate the knob portion in a direction in which the easily breakable portion 15 is easily broken. You can also. Furthermore, as the easily breakable portion, in addition to the narrow groove-like recessed portion, other known various easily breakable portions such as a cut line can be adopted.

(A) is the front view of the self-supporting bag which concerns on preferable one Embodiment of this invention, (b) is the side view which looked at (a) from the left side. It is a principal part front view of the self-supporting bag which concerns on preferable one Embodiment of this invention. It is a principal part front view of the self-supporting bag which concerns on other preferable embodiment of this invention. It is a schematic top view which illustrates the cross-sectional shape of the part enclosed by an easily breakable part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Self-supporting bag 11 Bag main body 12 Bag body trunk | drum 12A Front part 12B of trunk | drum Back part 13 of trunk | drum Outlet formation part 14 Bottom part of bag main body 15 Easily breakable part 16 Cut-out part 17 Knob piece (knob part)
18 Parting line 19 Shoulder portion 20 of the trunk portion Base portion of the spout forming portion 21 Non-slip convex portion 22 Arrow P1 Mounting surface P2 Surface parallel to the mounting surface P3 With respect to the surface parallel to the mounting surface Inclined surface X Direction perpendicular to the mounting surface θ Inclination angle

Claims (5)

A bag body made of a synthetic resin consisting of a bottom part and a body part having a spout forming part is molded by a mold, and a spout is formed by removing a portion to be cut by breaking the easily breakable part of the spout forming part. A self-supporting bag that
The spout forming part is provided so as to protrude from the body part in an upward direction substantially perpendicular to the mounting surface by the bottom part,
The easily breakable portion is a self-supporting bag formed along a plane inclined with respect to a plane parallel to the placement surface.   The self-supporting bag according to claim 1, wherein a knob portion is provided at a portion to be cut of the spout forming portion.   The knob portion is adjacent to the highest or lowest position of the easily breakable portion formed along the inclined surface, and is continuous only with the planned cutting portion, and forms a spout across the easily breakable portion. The self-supporting bag according to claim 2, wherein the self-standing bag is provided so as to extend to a base portion of the portion.   The self-supporting bag according to any one of claims 1 to 3, wherein the easily breakable portion includes a narrow groove-like recess surrounding the spout forming portion in an annular shape.   The self-supporting bag according to any one of claims 1 to 4, wherein the synthetic resin bag body is formed by blow molding.

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