JP5554580B2 - Synthetic spout - Google Patents

Description

  The present invention relates to a synthetic resin spout (spout plug) that can be suitably applied to a container formed of cardboard laminated with a synthetic resin film and / or a metal foil.

  As a spout that can be suitably applied to a container formed from a cardboard laminated with a synthetic resin film and / or a metal foil, the following Patent Document 1 discloses a spout formed from an appropriate synthetic resin such as polyethylene or polypropylene. Is disclosed. The spout includes a cylindrical wall and a locking flange that extends radially outward from a lower portion of the cylindrical wall. The cylindrical wall includes a male thread portion, a protrusion portion, a thin interposed portion, and a thick lower portion that are sequentially located from the upper side to the lower side when viewed in the axial direction. A male thread is formed on the outer peripheral surface of the male thread part, and an annular projecting part (a shape that extends completely continuously in the circumferential direction and a local notch when viewed in the circumferential direction is formed on the outer peripheral surface of the projecting part. (Including a ridge that is substantially annular as a whole). The outer ends of two spokes extending radially from the center of the cylindrical wall at an angular interval of 180 degrees are connected to the inner peripheral surface of the thick lower portion. Such spouts have their locking flanges locked to the container, and their cylindrical walls are positioned corresponding to the outlets formed in the container to form the spout. An outer lid is attached to the cylindrical wall. The outer lid has a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall. A female thread is formed on the inner peripheral surface of the skirt wall, and the outer cover is attached to the cylindrical wall by screwing the female thread into the male thread formed on the male thread portion of the cylindrical wall. Is done. An annular seal piece that hangs downward is formed on the inner surface of the top wall. When the outer cover is attached to the cylindrical wall as required, the seal piece is brought into close contact with the upper part of the inner peripheral surface of the cylindrical wall, thereby The wall is sealed.

Japanese Patent No. 4048610

  The conventional spout as described above has the following problems to be solved. Spokes extending radially from the center of the cylindrical wall are present in the cylindrical wall, but due to the presence of such spokes, the flow of container contents poured out through the cylindrical wall, such as soft drinks or alcoholic beverages, is hindered. , There is a risk that the contents will be scattered around.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is the content when the content is poured out through the cylindrical wall while preventing the flow of the content from being inhibited by the spokes as much as possible. It is to solve the problem of scattered objects.

As a result of intensive studies, the present inventors have determined that the main part of each spoke has a circular or elliptical cross-sectional shape, or a deformed ellipse that has an elongated shape in the axial direction and has sharp edges at the upper and lower ends. In this way, it is possible to avoid as much as possible the flow hindrance of the contents due to the presence of the spokes, by forming the upper side surface gradually widening and the lower side surface gradually narrowing downward. We have found that technical problems can be achieved.

That is, according to the present invention, as a spout for achieving the main technical problem, the spout includes a cylindrical wall and a locking flange extending radially outward from a lower portion of the cylindrical wall. In the spout made of synthetic resin to which the outer ends of a plurality of spokes extending radially at equal angular intervals from the center of the cylindrical wall are connected to the peripheral surface,
The main part of each of the spokes is a deformed ellipse whose cross-sectional shape is circular or elliptical or elongated in the axial direction and whose upper and lower ends form sharp edges. There is provided a spout made of a synthetic resin, characterized by having a lower side surface gradually narrowing toward the bottom.

It is preferable that 3 to 6 spokes are provided. Advantageously, the outer ends of the spokes extend radially outward on both sides in the circumferential direction and on both axial sides.

  In the spout of the present invention, each main part of the spoke has an upper side surface that gradually widens downward and a lower side surface that gradually narrows downward, so that the flow of the contents can be inhibited by the spokes. It is avoided as much as possible, and the scattering of the contents when the contents are poured out through the cylindrical wall is sufficiently prevented or suppressed.

1 is a slope view of a spout constructed in accordance with the present invention. The front view of the spout shown in FIG. The top view of the spout shown in FIG. The bottom view of the spout shown in FIG. The longitudinal cross-sectional view of the spout shown in FIG. The cross-sectional view of the spoke in the spout shown in FIG. The cross-sectional view of the modification of a spoke. The cross-sectional view of another modified example of the spoke. The front view which shows a part of container and the outer cover with which the spout was mounted | worn with the spout of FIG.

  Referring to FIGS. 1-5, a spout, generally designated 2, constructed in accordance with the present invention can be injection molded from a suitable synthetic resin such as polyethylene or polypropylene. The spout 2 includes a cylindrical wall 4 and an annular flange 6 extending in the radial direction from the outer peripheral surface of the lower end of the cylindrical wall 4.

The cylindrical wall 4 in the illustrated spout 2 has an upper end portion 8, a male thread portion 10, a projecting portion 12, a thin interposed portion 14, and a thick lower portion 16 that are sequentially located from the upper side to the lower side when viewed in the axial direction. The upper end portion 8 has a cylindrical shape, and no thread or protrusion is formed on the outer peripheral surface and the inner peripheral surface thereof. A male thread 18 is formed on the outer peripheral surface of the male thread 10. On the outer peripheral surface of the ridge 12, a ridge 20 extending continuously in the circumferential direction is formed. The protrusion 20 in the illustrated embodiment is called a turnip portion, and has a truncated cone-shaped upper surface and a lower surface that extends substantially horizontally. A plurality of ratchet claws 22 in the illustrated embodiment are formed in the thin intervening portion 14 at intervals in the circumferential direction. Each of the ratchet pawls 22 has a sharp front surface located on the front side in the clockwise direction in FIG. 3 and a gentle rear surface located on the rear side in the clockwise direction. The thick lower portion 16 has a relatively thick thickness, and its inner diameter is substantially the same as the inner diameter of the upper end portion 8, the male thread portion 10, the protrusion portion 12, and the thin interposed portion 14, but its outer diameter is It is larger than the outer diameter of the upper end portion 8, the male thread portion 10, the protrusion portion 12, and the thin interposed portion 14. The upper end portion of the outer peripheral surface of the thick lower portion 16 has a slight arc shape in the longitudinal sectional view, and the outer diameter gradually increases downward. For such outer peripheral surface upper portion 4 of the locking protrusion 24 at intervals in the circumferential direction are formed.

As will be clearly understood by reference to FIGS. 3 to 5, the cylindrical wall 4 extending buildings plurality of spokes 26 radially at intervals in the circumferential direction from the center of the cylindrical wall 4 is arranged Yes. In the illustrated embodiment, the inner ends of the spokes 26 are connected to each other at the center of the cylindrical wall 4 to define a center intersection 28. It is important that the outer end of the spoke 26 is connected to the inner peripheral surface of the thin-walled interposition part 14 in the cylindrical wall 4. It is preferable that three to six spokes 26 are arranged at equiangular intervals in the circumferential direction. In the illustrated embodiment, three spokes 26 are disposed at an angular interval of 120 degrees in the circumferential direction, and each of the spokes 26 extends substantially horizontally. The outer end portions 30 of each of the spokes 26 extend radially outward on both sides in the circumferential direction and extend on both sides in the axial direction (that is, upward and downward), so that the thin interposed portion 14 of the cylindrical wall 4 extends. Conveniently connected to the inner peripheral surface. The main part of each of the spokes 26, in the illustrated embodiment, the portion between the center intersection point 28 and the outer end 30 as much as possible inhibits the flow of the container contents poured out through the cylindrical wall 4. In order to avoid this, it may be a circle shown in FIG. 6 or a vertically long (that is, long in the axial direction) ellipse shown in FIG. 7, or a deformed ellipse that is vertically long and has sharp edges at the top and bottom as shown in FIG. there are, it is important to have a lower surface made gradually narrower towards the side and downwards on becomes gradually wider downwardly.

  In the illustrated spout 2, as understood by referring to FIG. 5, the outer ends of the spokes 26 are connected to the inner peripheral surface of the thin-walled interposition portion 14 of the cylindrical wall 4, and the spokes 26 are thinly interposed. It should be noted that the rigidity of the portion 14 is enhanced. Since the rigidity of the thin-walled interposition part 14 is increased, it is sufficiently prevented or suppressed that the cylindrical wall 4 is deformed or inclined and the sealing of the cylindrical wall 4 by the outer cover is damaged, and the thin-walled interposition part 14 is also prevented. It is sufficiently prevented or suppressed that the ratchet pawl 22 formed on the outer peripheral surface of the rim is displaced inward in the radial direction and its function is impaired. From the viewpoint of preventing or suppressing the ratchet pawl 22 from being displaced inward in the radial direction, the ratchet pawl 22 is advantageously disposed so as to at least partially overlap the main portion of the spoke 26 as viewed in the axial direction. .

  The spout 2 as described with reference to FIGS. 1 to 8 is conveniently formed by injecting a molten synthetic resin into a mold (not shown) from the upper surface of the central intersection 28 of the spokes 26. Can do. Then, as shown in FIG. 9, a cardboard container 32 in which an appropriate synthetic resin film such as a polyester film and / or an appropriate metal foil such as an aluminum foil is laminated (only a part thereof is shown in FIG. 9). Applies to Continuing with reference to FIG. 9, in the illustrated embodiment, a circular opening 36 is formed in the top wall 34 of the container 32. The upper surface of the flange 6 of the spout 2 is brought into close contact with the inner surface of the upper surface wall 34 of the container 32 and is fixed to the inner surface of the upper surface wall 34 by an appropriate manner such as ultrasonic welding. The cylindrical wall 4 of the spout 2 protrudes upward through a circular opening 36 in the top wall 34. The outer diameter of the lower portion of the thick lower portion 16 of the cylindrical wall 4 may be substantially the same as the inner diameter of the circular opening 36 of the upper surface wall 34. The locking protrusion 24 formed at the upper end of the outer peripheral surface of the thick lower portion 16 of the cylindrical wall 4 is spouted from the circular opening 36 of the container 32 before fixing the flange 6 of the spout 2 to the inner surface of the upper surface wall 34. Temporarily prevents 2 from leaving.

  On the cylindrical wall 4 of the spout 2 fixed to the container 32 as required, an outer lid generally indicated by numeral 38 is attached. The outer lid 38 that can be injection-molded or compression-molded from an appropriate synthetic resin such as polypropylene or polyethylene includes a circular top wall 40 and a skirt wall 42 depending from the periphery of the top wall 40. An annular seal piece 44 that protrudes downward is formed on the inner surface of the top wall 40. In the illustrated embodiment, the outer peripheral surface of the upper end portion of the skirt wall 42 has a truncated cone shape whose outer diameter gradually increases downward, and the outer peripheral surface other than the upper end portion has a substantially cylindrical shape. A breakable line 46 extending in the circumferential direction is formed in the lower part of the skirt wall 42, and the skirt wall 42 has a main portion 48 above the breakable line 46 and a tamper evidence below the breakable line 46. A skirt 50 is defined. The breakable line 46 itself is composed of a plurality of slits 52 extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridging portions 54 positioned between the slits 52. A female thread 56 is formed on the inner peripheral surface of the main portion 48 of the skirt wall 42, and a plurality of ratchet claws 58 are formed on the inner peripheral surface of the tamper evidence skirt portion 50 at intervals in the circumferential direction. Has been. The ratchet pawl 58 has a gentle front surface located on the front side in the clockwise direction when viewed from above in FIG. 9 and a rear surface located on the rear side in the clockwise direction. On the outer peripheral surface of the main portion 48 of the skirt wall 42, a so-called knurl 60 in which irregularities are repeated is formed.

  When the outer lid 38 is attached to the cylindrical wall 4 of the spout 2 and the spout 2 is sealed, the outer lid 38 is fitted on the cylindrical wall 4 and rotated clockwise as viewed from above in FIG. Thus, the female thread 56 of the outer lid 38 is screwed into the male thread 18 formed in the male thread portion 10 of the cylindrical wall 4, and the outer lid 38 is lowered with rotation. When the outer lid 38 is lowered to the required position shown in FIG. 9, the annular seal piece 44 formed on the inner surface of the top wall 40 of the outer lid 38 enters the cylindrical wall 4 of the spout 2, and the cylindrical wall 4 And the spout 2 is sealed. The ratchet pawl 58 formed on the inner peripheral surface of the tamper evidence skirt 50 of the outer lid 38 has a loose front surface formed on the outer peripheral surface of the thin interposing portion 14 of the cylindrical wall 4 of the spout 2. Acts on the gradual rear surface of and passes through.

  When the contents of the container 32 are consumed, the outer lid 38 is rotated counterclockwise as viewed from above in FIG. Thus, the outer lid 38 does not rise with rotation due to the cooperation of the male thread 18 of the spout 2 and the female thread 56 of the outer lid 38. On the other hand, the tamper evidence skirt 50 of the skirt wall 42 of the outer lid 38 is prevented from rotating by the cooperation of the raised rear surface of the ratchet pawl 58 and the raised front surface of the ratchet pawl 22, and thus the bridge at the breakable line 46. Stress is generated in the tangle 54, the bridge 54 is broken, and the tamper evidence skirt 50 is separated from the main portion 48 of the skirt wall 42. Thereafter, the outer lid 38 is lifted with rotation while leaving the tamper evidence skirt 50, and is detached from the cylindrical wall 4 of the spout 2, and the spout 2 is opened. Then, the contents of the container 32 can be discharged through the cylindrical wall 4 of the spout 2 by tilting the container 32. In the spout 2 constructed in accordance with the present invention, the spokes 26 disposed in the cylindrical wall 4 of the spout 2 have an upper side and a lower side that gradually widen downward as shown in FIGS. And the lower side surface gradually narrowing toward the surface, the flow of the content by the spokes 26 is prevented as much as possible, and the content is sufficiently scattered when the content is poured out through the cylindrical wall 4. Is prevented or suppressed.

2: Spout 4: Cylindrical wall 6: Flange 10: Threaded portion 12: Projected ridge portion 14: Thin walled portion 16: Thick lower portion 18: Male thread ridge 20: Projected ridge 22: Ratchet claw 26: Spoke 32: Container 38 : Outer lid

Claims (4)

A cylindrical wall and a locking flange extending radially outward from a lower portion of the cylindrical wall, the inner circumferential surface of the cylindrical wall being radially spaced from the center of the cylindrical wall at equal angular intervals In the spout made of synthetic resin to which the outer ends of a plurality of spokes are connected,
Each main part of the spoke is circular or elliptical in cross-sectional shape, and has an upper side surface gradually widening downward and a lower side surface gradually narrowing downward. Synthetic resin spout. A cylindrical wall and a locking flange extending radially outward from a lower portion of the cylindrical wall, the inner circumferential surface of the cylindrical wall being radially spaced from the center of the cylindrical wall at equal angular intervals In the spout made of synthetic resin to which the outer ends of a plurality of spokes are connected,
Each of the main portion of the spokes, elongated and upper and lower ends cross-sectional shape in the axial direction is gradually narrowed toward the sides and downwards on becomes gradually wider downwardly Ri modified oval der forming a sharp edge A spout made of synthetic resin, characterized by having a lower surface . The synthetic resin spout according to claim 1 or 2 , wherein 3 to 6 spokes are arranged. The spout made of synthetic resin according to any one of claims 1 to 3 , wherein the outer ends of the spokes extend radially outward on both sides in the circumferential direction and extend on both sides in the axial direction.

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