JP3866798B2 - Synthetic resin cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin cap in which a cap body and an upper lid are separated.
[0002]
[Prior art]
Conventionally, a synthetic resin cap in which an upper lid integrally joined to a cap body by a three-point hinge is integrally formed is used. However, since the three-point hinge has a step between the main hinge and the strap hinge, for example, when the skirt wall is widened, the die cannot be removed even if the molding die is split during molding. Therefore, when the skirt wall is widened, the cap main body and the upper lid must be separately formed into two pieces, and the two are combined and integrally assembled after forming. Also, there are cases where the cap body and the upper lid are made of two colors for design reasons, such as different colors. When two caps are used in this way, the cap body and top lid must be easy to mold as well as the two can be easily and firmly joined together, and the joint must be bulky so that the design is not impaired. Is done.
[0003]
2. Description of the Related Art Conventionally, in a synthetic resin cap (hereinafter simply referred to as a cap) of a type in which a cap body and an upper lid are separated, as a means for connecting the cap body and the upper lid, a skirt wall of the cap body is screwed with a bottle neck and neck. A double wall structure of an inner skirt wall formed with a thread or the like to be joined and an outer skirt wall provided on the outer side of the inner skirt wall is formed, and a coupling hole is formed in the top wall between the two walls. In general, a structure in which a coupling piece provided in the coupling portion of the upper lid is penetrated and coupled is used (for example, Japanese Utility Model Publication No. 63-126261, Japanese Utility Model Publication No. 4-54129).
[0004]
However, the coupling of such a structure has a disadvantage that the skirt wall of the cap body has a double wall structure and a useless wall is provided, which increases the material cost and the molding cost. Furthermore, the coupling portion is necessarily located outside the inner skirt wall, which is the bottle coupling wall of the cap body, and there are restrictions in size and design.
[0005]
[Problems to be solved by the invention]
The present invention is intended to solve the above-mentioned conventional problems in a two-piece cap formed by separately forming a cap body and an upper cover, and without forming a coupling hole on the top wall surface of the cap body. Cap body can be easily and firmly joined, skirt wall of cap body can be single wall, material cost and molding cost can be reduced, and joint part should be formed inside skirt wall of cap body An object of the present invention is to provide a synthetic resin cap having a high degree of freedom in size and design.
[0006]
[Means for Solving the Problems]
The synthetic resin cap according to the present invention is a synthetic resin cap composed of two pieces of a cap body and an upper lid, wherein the cap body is provided with a coupling portion having an uneven fitting means, and a lower end portion of the annular wall of the upper lid is provided with a hinge. A coupling block having a concave and convex fitting means for fitting and coupling with the concave and convex fitting means formed on the coupling portion of the cap body. Is formed with a concave surface reaching the skirt wall on the top wall of the cap body, and a coupling protrusion is formed on the concave surface, and the coupling portion formed on the coupling block of the upper lid is inverted via the hinge. Ri Na to form a recess to be fitted to the coupling projections formed on the coupling portion of the cap body on the side which becomes a lower surface in the state, the coupling protrusions of the major axis side of the ellipse wall-like protrusions and the elliptical wall-like projection Both ends The concave portion formed in the coupling portion of the upper lid is formed at both ends of the elliptical groove into which the elliptical wall-shaped projection is fitted and the longer diameter side of the elliptical groove, and the cylindrical shape. By adopting technical means characterized by comprising a pair of round holes into which the protrusions fit , the above-mentioned problems are solved.
[0007]
The pre-Symbol coupling protrusion, formed of a cylindrical protrusion formed on the major axis side both ends of the elliptical wall-like protrusions and the elliptical wall-like protrusions and recesses formed in the coupling portion of the upper lid, elliptical groove and the By configuring with a pair of round holes formed at both ends of the elliptical groove on the long diameter side, when the cap body and the upper lid are coupled, positioning is easy, and the coupled portion may rotate or loosen even after coupling. It is more desirable because it provides a stable bond for long-term use. Further, it is desirable that an undercut portion is formed on the outer peripheral surface of the elliptical wall-shaped protrusion and the inner peripheral surface of the elliptical groove, and the undercut portions are engaged with each other to achieve stronger bonding.
[0008]
The hinge includes a main hinge in which a boundary between the lower end of the annular wall of the upper lid and the upper end of the side wall of the coupling block is a bent portion, and one end connected to the outer peripheral surface of the annular wall provided at both ends of the main hinge. In addition, since the other end is constituted by a narrow strap hinge connected to the side wall surface of the coupling block, it is not necessary to form a slit in the top wall of the upper lid, and there are few protrusions from the outer peripheral portion of the annular wall. Safe and desirable.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The cap of the present embodiment is composed of two pieces, a cap main body 1 having a container coupling portion and an upper lid 2 coupled to the cap main body, each of which is integrally formed with a synthetic resin. The container body 1 includes a skirt wall 5 in which an internal screw 6 that is screwed into a container mouth portion is formed, and a top wall 7 in which a spout 3 is formed, and the top wall 7 has an uneven fitting means. A part 8 is provided. As clearly shown in FIG. 2, the coupling portion 8 is formed by forming a substantially rectangular recessed surface 9 reaching the skirt wall on the top wall 7 and forming a coupling projection as an uneven fitting means on the recessed surface. Become. In the present embodiment, as the coupling protrusion, a hollow elliptical wall-shaped protrusion 10 is provided at the center of the recessed surface 9, and columnar protrusions 11, 11 are provided on both sides of the protrusion 10.
[0010]
In the present embodiment, an undercut 12 is formed in the corner portion of the outer peripheral surface of the elliptical wall-shaped protrusion 10 so as to be more firmly connected to a concave portion of the upper lid described later. Further, as shown in FIGS. 1 and 2, the end portion 13 of the screw thread of the inner screw 6 is formed in a right angle shape with respect to the inner peripheral surface of the skirt wall, and a stopper protrusion formed on the container mouth portion. And the cap can be positioned so that the final screwing position is always at the same angle.
[0011]
On the other hand, as shown in FIG. 3, the upper lid 2 has an annular wall 20 and a top wall 21 whose lower end edge coincides with the outer peripheral edge of the top wall of the cap body, and a coupling block 22 has a hinge 25 at the lower end of the annular wall. Are provided integrally. In this embodiment, the ceiling wall 21 is formed larger in diameter than the annular wall 20, and the annular wall 20 has an arch shape extending from the lower end edge to the outer peripheral edge of the ceiling wall 21 as shown in FIG. Although the curved surface is formed, the side on which the coupling block 22 is located is a vertical wall surface 23 so as to be in contact with the outer diameter of the lower end of the annular wall.
[0012]
The coupling block 22 is formed in a substantially rectangular block shape, and on the side that becomes the lower surface in a state of being inverted via the hinge 25 from the position shown in FIG. A pair of round holes 27, 27 correspond to the elliptical groove 26 and the cylindrical protrusion 11 corresponding to the elliptical wall-shaped protrusion 10 so as to be fitted to the concave-convex fitting means of the coupling portion 8 of the cap body. Is provided. An undercut (not shown) is formed in the elliptical groove 26 so as to be coupled to the undercut 12 formed on the elliptical wall-shaped protrusion 10 of the cap body. As shown in FIG. 1, the coupling block 22 is formed so that its upper surface 24 coincides with the upper surface of the top wall of the cap body 1 in a state where the coupling block 22 is fitted to the recessed surface 9 of the cap body. A fan-shaped surface 30 (FIG. 3D) is formed so that the circular arc coincides with the step outer peripheral edge 14 of the top wall 7.
[0013]
The hinge 25 includes a main hinge 28 and strap hinges 29 and 29 disposed on both sides of the main hinge 28. The main hinge 28 has a predetermined wide width with a boundary between the lower end of the vertical wall surface 23 and the upper end of the side wall of the coupling block as a bent portion. The strap hinges 29 and 29 are formed narrow on both sides of the main hinge 28. One end of the strap hinge is connected slightly above the lower end of the vertical wall surface, and the other end is connected to the side wall of the coupling block 22 below the main hinge 28, and is shorter and annular than the conventional three-point hinge strap hinge. The degree of protrusion outward from the wall outer peripheral surface is small, and the hinge portion is smooth. In addition, since the slit does not enter the top wall of the upper lid, the aesthetic appearance is not impaired, and the top wall of the cap body is securely sealed, which is hygienic.
[0014]
Reference numeral 31 in the figure indicates that when the cap body 1 and the upper lid 2 are integrated, the coupling block 22 rotates upward from the position indicated by the two-dot chain line in FIG. It is a positioning stopper for preventing, and is formed to project downward from the inner surface of the top wall 21 of the upper lid 2.
[0015]
The cap of the present embodiment is configured as described above, and the coupling block is folded back to the state shown by the two-dot chain line in FIG. 3 to provide the elliptical wall-like protrusion 10 and the cylindrical protrusion provided on the top wall recess surface 9 of the cap body 1. 11, the cap body and the upper lid can be easily and firmly fitted and integrated by simply pressing and fitting the elliptical groove 26 and the round holes 27 and 27 provided in the coupling block 22 of the upper lid 2 to each other. . At that time, since the coupling block 22 is backed up by the positioning stopper 31, the coupling of the coupling portion can be stably performed. In addition, in the present embodiment, the coupling protrusion is composed of an elliptical wall-shaped projection and a cylindrical projection, and the coupling recess is formed of an elliptical groove and a round hole to be fitted with the projection, so that positioning is ensured when the two are coupled. Even after the coupling, the coupling portion is not displaced or rattled and is firmly integrated, and the cap body can be reliably sealed with the upper lid. Moreover, since the undercut is provided in the coupling | bond part of an elliptical wall-shaped protrusion and an elliptical groove | channel, it does not detach | leave easily after a fitting.
[0016]
Further, after the cap body and the upper lid are joined, as shown in the cross-sectional view of FIG. 1, the top wall surface of the cap body and the upper surface of the joining block 22 are flush with each other with the cap body and the upper lid joined together. Since the outer peripheral edge of the stepped wall surface and the outer peripheral edge of the fan-shaped surface of the connecting block are connected to form a perfect circle, the aesthetic appearance is improved and the inner peripheral edge of the lower end of the annular wall of the upper cover is the upper peripheral edge A stable state can be maintained by fitting to the outer peripheral surface.
[0017]
As described above, according to the present invention, the cap body 1 and the upper lid 2 do not need to be provided with a fitting hole in the top wall of the cap body. Can be reduced. In the present embodiment, the hinge has a two-piece structure while the hinge is a smooth hinge in which no slit is formed on the top surface of the upper lid and the hinge portion hardly protrudes outward. Can be formed into an arbitrary shape such as a mountain shape with an expanded lower portion or a reverse taper shape, and a wide selection of designs and sizes can be obtained, so that a cap rich in fashion can be obtained.
[0018]
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made within the scope of the technical idea. For example, the concave / convex fitting means of the engaging portion is provided with an engaging protrusion on the cap body and an engaging concave portion on the upper lid in the above embodiment, but conversely, an engaging concave portion is provided on the cap main body and the engaging protrusion on the upper lid. It is also possible to provide. Further, the engagement protrusion is not necessarily limited to the elliptical wall-shaped protrusion and the cylindrical protrusion, and may be only the elliptical wall-shaped protrusion, or may be a coupling protrusion having another shape. Furthermore, the form of the hinge is not limited to that of the present embodiment, and various forms can be adopted.
[0019]
【The invention's effect】
As described above, according to the synthetic resin cap of the present invention, the upper lid and the cap body can be easily and firmly coupled without forming a coupling hole in the top wall surface of the cap body. Therefore, the skirt wall of the cap body may be a single wall, which can reduce material costs and molding costs, and the coupling part can be formed inside the skirt wall of the cap body, so that the size and design are free. A high degree of cap can be obtained. By forming a concave surface reaching the skirt wall on the top wall of the cap body and fitting the coupling block to the concave surface, the coupling block of the upper lid is located in the top wall of the cap body after coupling, and the appearance is good Moreover, there are few protrusions from the coupling part, and it is safe.
[0020]
In addition, the coupling protrusion is composed of an elliptical wall-shaped projection and a cylindrical projection, and the coupling recess is formed by an elliptical groove and a round hole to be fitted therewith, so that the positioning can be ensured when the two are coupled. The coupling portion is not displaced or loose, and is firmly integrated, and the cap body can be reliably sealed with the upper lid. Further, by providing an undercutter at the joint between the elliptical wall projection and the elliptical groove, they are not easily detached after fitting.
[0021]
Furthermore, according to the present invention, it is possible to employ a smooth hinge in which no slit is formed on the top surface of the upper lid and the hinge portion hardly protrudes outward, and the shape of the skirt wall of the cap body can be achieved while being a smooth hinge. Arbitrary shapes such as mountain shapes can be used.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a synthetic resin cap according to an embodiment of the present invention.
2A and 2B show a cap body of a synthetic resin cap according to an embodiment of the present invention, in which FIG. 2A is a front sectional view, FIG. 2B is a side view, and FIG.
3A and 3B show a top cover of a synthetic resin cap according to an embodiment of the present invention, in which FIG. 3A is a front sectional view, FIG. 3B is a side view, FIG. 3C is a plan view, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cap main body 2 Top cover 5 Skirt wall 7 Top wall 8 Engagement part 9 Recessed surface 10 Elliptical wall-shaped protrusion 11 Cylindrical protrusion 12 Undercut 20 Annular wall 21 Top wall 22 Connecting block 23 Vertical wall surface 25 Hinge 26 Elliptical groove 27 Round Hole 28 Main hinge 29 Strap hinge

Claims (3)

In a synthetic resin cap composed of a cap body and an upper lid, a coupling portion having a concave and convex fitting means is provided on the cap body, and a coupling block is provided on a lower end portion of the annular wall of the upper lid via a hinge. The block is formed with a coupling portion having concave and convex fitting means for fitting and coupling with the concave and convex fitting means formed on the coupling portion of the cap main body, and the coupling portion of the cap main body is formed on the top wall of the cap main body. A concave surface reaching the skirt wall is formed, and a coupling protrusion is formed on the concave surface, and the coupling portion formed on the coupling block of the upper lid is reversed to the lower surface side through the hinge. Ri Na to form a recess to be fitted to the coupling projections formed on the coupling portion of the cap body,
The coupling protrusion is composed of an elliptical wall-shaped projection and cylindrical projections formed on both ends of the elliptical wall-shaped projection on the longer diameter side, and the concave portion formed in the coupling portion of the upper lid is fitted with the elliptical wall-shaped projection. A synthetic resin cap comprising an elliptical groove and a pair of round holes formed at both ends of the elliptical groove on the longer diameter side and into which the cylindrical protrusion is fitted . The synthetic resin cap according to claim 1 , wherein undercut portions are formed on an outer peripheral surface of the elliptical wall-shaped protrusion and an inner peripheral surface of the elliptical groove. The hinge includes a main hinge in which a boundary between the lower end of the annular wall of the upper lid and the upper end of the side wall of the coupling block is a bent portion, and one end connected to the outer peripheral surface of the annular wall provided at both ends of the main hinge, The synthetic resin cap according to claim 1 or 2 , comprising a narrow strap hinge having the other end connected to the side wall surface of the coupling block.

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