JP2011173615A - Spout integrally molded of synthetic resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spout enabling a score to be sufficiently easily broken when the spout is opened without generating accidental breakage of the score during transportation of a vessel or the like though the spout is integrally molded of a synthetic resin. <P>SOLUTION: Cut areas (20) specified by breakage scores (22 and 24) are formed not only on the top surface wall (4) but at the upper end of a cylindrical wall (6) to constitute so that the breakage may start from the breakage scores (22 and 24) formed on the cylindrical wall (6). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a spout that can be suitably applied to a synthetic resin film container called a pouch.

  As is well known, pouches are widely used in practice as containers for various refilling cleaning liquids. And, as a spout applied to such a pouch, in view of the fact that a reseal after opening is unnecessary, as disclosed in the following Patent Document 1, an integrally formed pouch that can be manufactured at low cost, That is, a spout integrally formed from an appropriate synthetic resin such as low density polyethylene has been proposed. Such a spout has a circular top wall and a cylindrical wall depending from the periphery of the top wall, the top wall is formed with a circular score extending along the periphery, and a connecting cylinder is formed on the top surface of the top wall. A circular grip piece is connected via When the spout is opened and the content liquid is discharged, the gripping piece is gripped, stress is generated in the circular score formed on the top wall to break the circular score, and the top wall and the grip connected thereto The piece is removed and the upper surface of the cylindrical wall is opened.

Japanese Patent Laid-Open No. 2004-210321

  Thus, according to the experience of the present inventors, the conventional spout integrally formed from synthetic resin is suitable when the gripping piece is gripped to break the circular score, particularly when the circular score starts to break. There is a problem to be solved that requires great force and that it is not always easy to open the spout. In order to solve such a problem, it is intended to set the residual thickness of the circular score to be extremely small. However, if the residual thickness of the circular score is set to be extremely small, the circular score may occur accidentally when the container is transported. May be broken.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that it does not cause an accidental breakage of the score at the time of transporting the container, etc., despite being integrally molded from a synthetic resin. It is an object of the present invention to provide a new and improved spout that can break the score easily when opening the spout.

  As a result of diligent research and experiments, the present inventors have recognized that the conventional spout as described above requires a considerable force to start breaking because the score to be broken is a simple circle. On the basis of the above, the main technical problem described above is that not only the top wall but also the upper end portion of the cylindrical wall is formed with a cut region defined by the breaking score, and the breaking is started from the breaking score formed on the cylindrical wall. Found that can be achieved.

That is, according to the present invention, as a spout that achieves the main technical problem, a spout having a circular top wall and a cylindrical wall that hangs down from the periphery of the top wall, integrally molded from a synthetic resin,
The upper end portion of the cylindrical wall is provided with a cut region defined between a pair of longitudinal fracture scores extending downward from a boundary region between the top wall and the cylindrical wall at intervals in the circumferential direction.
The top wall is provided with a cut area defined by an arc-shaped break line extending in an arc shape in the boundary area between the top wall and the cylindrical wall except between the pair of longitudinal break scores,
A gripping piece is attached to the cutout region defined at the upper end of the cylindrical wall, and the pair of longitudinal break scores and the arc-shaped break score are broken by gripping and displacing the grip piece. The cut region defined at the upper end of the cylindrical wall and the cut region defined at the top wall are cut together.
A spout characterized by this is provided.

  Preferably, the upper end portion of the cylindrical wall is provided with a thin wall region that is generated by locally flattening the outer peripheral surface and gradually decreases in thickness toward the center in the circumferential direction. The longitudinal break score is formed in the thin region. The gripping piece is composed of a hanging piece extending downward from a connecting portion connected to the outer peripheral surface of the cutout region defined at the upper end portion of the cylindrical wall, or extends along the outer peripheral surface of the upper end portion of the cylindrical wall. And the inner peripheral surface of the part located in opposition to the cutout region defined at the upper end of the cylindrical wall is composed of a ring connected to the cutout region defined at the upper end of the cylindrical wall. Is preferred. Conveniently, an additional break score is formed extending from one upper end of the pair of longitudinal break scores into the top wall.

  In the spout of the present invention, since the fracture is started from a pair of longitudinal fracture scores formed at the upper end portion of the cylindrical wall that can concentrate the stress, it is not necessary to set the residual thickness of the score extremely small. Thus, the break of the score can be started sufficiently easily to open the spout.

1 is a perspective view showing a preferred embodiment of a spout configured according to the present invention. The front view of the spout shown in FIG. The side view of the spout shown in FIG. The top view of the spout shown in FIG. FIG. 5 is a cross-sectional view of the spout shown in FIG. 1 along the line vv in FIG. 4. The slope view which shows the spout shown in FIG. 1 in the state which opened the fracture | rupture score fractured | ruptured. The top view which shows the modification of the spout comprised according to this invention. The top view which shows the other modification of the spout comprised according to this invention. The top view which shows the further another modification of the spout comprised according to this invention. FIG. 10 is a cross-sectional view of the spout shown in FIG. 9 along line xx of FIG. 9.

  In the following, a preferred embodiment of a spout constructed in accordance with the present invention will be described in more detail with reference to the accompanying drawings.

  Referring to FIGS. 1 to 5, the spout designated as a whole by the number 2 configured according to the present invention is integrally injection-molded from a suitable synthetic resin such as soft polyethylene. The spout 2 has a circular top wall 4 and a cylindrical wall 6 depending from the periphery of the top wall 4.

  Two support flanges 10 and 12 are formed on the outer periphery of the intermediate portion in the axial direction of the cylindrical wall 6 at intervals in the axial direction. The support flanges 10 and 12 extending substantially horizontally have a shape obtained by cutting a rhombus tip portion at parallel side edges and parallel both edges. Between the support flange 10 and the support flange 12, two reinforcing pieces 14 that extend vertically and a reinforcing piece 16 that extends horizontally are disposed. Below the support flange 12, on the outer periphery of the cylindrical wall 6, there are four projecting flanges having the same shape as the support flanges 10 and 12 and extending horizontally at intervals in the axial direction. A pouch mounting means 18 known per se including the reinforcing piece is also provided.

  In the spout 2 constructed according to the present invention, it is important that a cutout region 20 is defined at the upper end of the cylindrical wall 6. As can be understood by referring to FIG. 6 together with FIGS. 2 and 5 (in FIG. 6, the longitudinal fracture score 22, the lateral fracture score 24 and the arc-shaped fracture score 30 described later are shown broken). In the illustrated embodiment, the cut region 20 is defined by two longitudinal break scores 22 and lateral break scores 24. As clearly shown in FIG. 6, the specific angle region at the upper end of the cylindrical wall 6 is a thin region where the outer peripheral surface is locally flattened and the thickness gradually decreases toward the circumferential center. 26 is arranged. The longitudinal break score 22 and the transverse break score 24 are disposed in the thin region 26, and the longitudinal break score 22 extends downward from the boundary region between the top wall 4 and the cylindrical wall 6 at intervals in the circumferential direction. The horizontal break score 24 connects the lower ends of the two vertical break scores 22. The two longitudinal break scores 22 are inclined in a direction approaching each other downward, and therefore the cut-out area 20 has a substantially inverted trapezoidal shape whose circumferential width gradually decreases downward. If so, the two longitudinal fracture scores 22 can be extended in parallel to the axial direction (therefore, the cut-out area 20 has a substantially rectangular shape), or the lower ends of the two longitudinal fracture scores 22 extending at an inclination can be used. It can also be connected directly (thus the cut-out area 20 is an inverted isosceles triangle). The longitudinal fracture score 22 and the lateral fracture score 24 may be in a form in which a groove is formed on the outer peripheral surface (or inner peripheral surface) of the cylindrical wall 6 to reduce the residual thickness.

  In the spout 2 constructed according to the present invention, it is further important that the top wall 4 has a cut-out area 28 defined. The cut region 28 is defined by an arcuate break score 30 that extends in a circular arc around the periphery of the top wall 4 except between the pair of longitudinal break scores 22. One end of the arc-shaped break score 30 is connected to one upper end of the vertical break score 22, and the other end is connected to the other upper end of the vertical break score 22. The arc-shaped fracture score 30 may be formed by forming a groove on the upper surface, that is, the outer surface (or the lower surface, or the inner surface) of the top wall 4 to reduce the residual thickness.

  Furthermore, in the spout 2 configured according to the present invention, it is important that the gripping piece 32 is attached to the cutout region 20 defined in the cylindrical wall 6. As can be understood by referring to FIGS. 1, 3, and 5, in the illustrated embodiment, the gripping piece 32 is connected to the cutout region 20 via a portion 34 corresponding to the shape of the cutout region 20. It is composed of a hanging piece extending from the connecting portion, that is, the upper end portion, inclining radially outwardly downward in the axial direction and then extending downward in the axial direction. The lower end portion of the gripping piece 32 is enlarged in a substantially circular shape, and the inner surface thereof is detachably connected to the outer peripheral surface of the cylindrical wall 6 via a conical protruding piece 36.

  As shown in FIG. 1, the spout 2 as described above has a lower portion, that is, a pouch mounting means 18, and a pouch 38 filled with an internal solution (only a part thereof is shown by a two-dot chain line in FIG. 1). It is inserted into the discharge opening, and the discharge opening of the pouch 38 is heat-welded around the pouch mounting means 18. Thus, the spout 2 is fixed to the discharge opening of the pouch 38, and the discharge opening of the pouch 38 is sealed.

  When the content liquid in the pouch 38 is discharged, the lower end portion of the gripping piece 32 is gripped and the lower portion of the gripping piece 32 is forced outward or upward in the radial direction, and is disposed at the lower end portion of the gripping piece 32. The tip of the protruding piece 36 is broken and separated from the outer peripheral surface of the cylindrical wall 6. Next, the gripping piece 32 is further forced upward. In this way, stress is generated in the transverse break score 24 and the pair of longitudinal break scores 22 of the cut region 20 via the protrusion 34 connecting the upper end portion of the gripping piece 32 to the cut region 20, and thereby the transverse break score. 24 is broken, and then a pair of longitudinal break scores 22 are gradually broken from the lower end toward the upper end. Such breakage of the transverse break score 24 and the pair of longitudinal break scores 22 is generated by concentrating on a limited portion where the stress is relatively narrow, and also by forcing the gripping piece 32 upward, the transverse break score 24 is generated. And, since stress is effectively applied to the pair of longitudinal break scores 22, it can be realized sufficiently easily.

  Following the breakage of the transverse break score 24 and the pair of longitudinal break scores 22, when the gripping piece 32 is further forced upward or radially opposite, the arcuate score 30 follows one or both of the pair of longitudinal break scores 22. The cut-out area 20 and the cut-out area 28 are separated from other parts of the spout 2 together with the gripping piece 32, and the upper surface of the cylindrical wall 6 is opened as clearly shown in FIG. The Thereafter, the content liquid can be discharged through the upper surface of the opened cylindrical wall 6.

  FIG. 7 illustrates a variation of a spout constructed in accordance with the present invention. In the spout 102 shown in FIG. 7, the top wall 104 extends in an arc shape from the upper end of one of a pair of longitudinal break scores (not shown) (vertical break score positioned upward in FIG. 7) into the top wall 104. An additional break score 131 is formed. In such a spout 102, the additional break score 131 is broken following the break of the pair of longitudinal break scores, and then the gripping piece 132 is gradually forced or displaced counterclockwise from below in FIG. The score 130 can be ruptured smoothly from one end (the end positioned below in FIG. 7) to the other end.

  FIG. 8 illustrates another variation of a spout constructed in accordance with the present invention. In the spout 202 shown in FIG. 8, the top wall 204 is linearly formed in the top wall 204 from the upper end of one of the pair of vertical break scores (not shown) (vertical break score positioned upward in FIG. 8). An extended additional break score 231 is formed. In such a spout 202, an additional rupture score 231 is ruptured following rupture of a pair of longitudinal rupture scores, and then the gripping piece 232 is gradually forced or displaced counterclockwise from below in FIG. The score 230 can be smoothly ruptured from one end (the end located below in FIG. 8) to the other end.

  9 and 10 illustrate yet another variation of a spout constructed in accordance with the present invention. In the spout 302 illustrated in FIGS. 9 and 10, the gripping piece 332 is configured by a ring extending along the outer peripheral surface of the upper end portion of the cylindrical wall 306. The inner peripheral surface of the portion of the gripping piece 332 made up of a ring that faces the cut region 320 defined by the cylindrical wall 306 is provided with a protrusion 334 having a shape corresponding to the shape of the cut region 320. Are connected to the cutout region 320. In such a spout 302, when the content liquid contained in the pouch is discharged, the grip piece 332 is gripped by gripping a portion of the grip piece 332 that is located on the opposite side in the diameter direction with respect to the cut region 320. Is displaced upward and diametrically opposite, and then, if necessary, a finger is passed through the gripping piece 332 composed of a ring, and the gripping piece 332 is forced further upward to obtain a transverse breakage score and a longitudinal breakage score ( (Not shown), and also the arcuate break score 330 is broken, and the gripping piece 332 along with the cutout areas 320 and 328 is cut from the rest of the spout 302 to create an opening in the upper surface of the cylindrical wall 306.

2: Spout 4: Top wall 6: Cylindrical wall 20: Cut area 22: Longitudinal break score 24: Transverse break score 26: Thin wall area 28: Cut area 30: Arc-shaped break score 32: Grazing piece 38: Pouch 102: Spout 104: Top wall 130: Arc fracture score 131: Additional fracture score 202: Spout 204: Top wall 230: Arc fracture score 231: Additional fracture score 302: Spout 306: Cylindrical wall 320: Cut area 330: Arc fracture score 332: Grasping piece

Claims (5)

In a spout integrally molded from a synthetic resin having a circular top wall and a cylindrical wall depending from the periphery of the top wall,
The upper end portion of the cylindrical wall is provided with a cut region defined between a pair of longitudinal fracture scores extending downward from a boundary region between the top wall and the cylindrical wall at intervals in the circumferential direction.
The top wall is provided with a cut area defined by an arc-shaped break line extending in an arc shape in the boundary area between the top wall and the cylindrical wall except between the pair of longitudinal break scores,
A gripping piece is attached to the cutout region defined at the upper end of the cylindrical wall, and the pair of longitudinal break scores and the arc-shaped break score are broken by gripping and displacing the grip piece. The cut region defined at the upper end of the cylindrical wall and the cut region defined at the top wall are cut together.
Spout characterized by that.   The upper end of the cylindrical wall is provided with a thin region that is generated by locally flattening the outer peripheral surface and gradually decreases in thickness toward the center in the circumferential direction. The spout according to claim 1, wherein the spout is formed in the thin region.   The spout according to claim 1 or 2, wherein the gripping piece is composed of a hanging piece that extends downward from a connection portion connected to an outer peripheral surface of the cut-out region defined at an upper end portion of the cylindrical wall.   The gripping piece extends along the outer peripheral surface of the upper end portion of the cylindrical wall, and the inner peripheral surface of the portion located opposite to the cutout region defined at the upper end portion of the cylindrical wall is the upper end portion of the cylindrical wall. The spout according to claim 1 or 2, comprising a ring connected to the cut-out area defined in claim 1.   The spout according to any one of claims 1 to 4, wherein an additional break score extending from one upper end of the pair of longitudinal break scores into the top wall is formed.

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