JPH1024948A - Synthetic resin cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and firmly combine the upper cover and the cap body and reduce the material cost and the molding cost, by providing a connection block on the upper cover through a hinge and forming a connection part provided with a protrusion-recession fitting means fitted and connected to a protrusion- recession fitting means formed at the connection part of the cap body, in the connection block. SOLUTION: A cap body 1 is provided with a connection part 8 having a protrusion-recession fitting means at the top wall. And the upper cover 2 is integrally provided with a connection block 22 through a hinge 25 at the lower end of the circular wall 20. And hence, the connection block 22 is folded back and an elliptic groove 26 and round holes 27 formed in the connection block 22 of the upper cover 2 are pressed on the elliptic wall-shaped protrusion 10 and a columnar protrusion 11 of the connection part 8 formed in the hollow face 9 of the top wall of the cap body 1 and fitted thereto. The positioning for the connection of the protrusions 10, 11 and recessions 26, 27 is secure and after the connection, the connection part is not displaced and loosened and it is firmly integrated. The cap body can be securely hermetically sealed by the upper cover.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin cap in which a cap main body and an upper lid are formed separately.

[0002]

2. Description of the Related Art Conventionally, a synthetic resin cap in which an upper lid integrally connected to a cap body at a three-point hinge is integrally formed has been frequently used. However, since the three-point hinge has a step between the main hinge and the strap hinge, for example, if the skirt wall is widened, the mold cannot be removed even if the mold is split at the time of molding. Therefore, when the skirt wall is widened, the cap body and the upper lid must be formed separately and molded into two pieces, and after molding, the two are combined and integrally assembled. Further, the cap body and the upper lid may be made into two pieces for design reasons such as different colors. When the cap is made of two pieces, it is required that the cap body and the upper lid can be easily and firmly connected at the time of assembling, as well as that the connecting portion is not bulky and does not impair the design. Is done.

[0003] Conventionally, in a synthetic resin cap of a type in which a cap body and an upper lid are separated from each other (hereinafter simply referred to as a cap), a skirt wall of the cap body is connected to a bottle opening as means for coupling the cap body and the upper lid. A double-walled structure of an inner skirt wall formed with a screw thread or the like to be screwed with the neck and an outer skirt wall provided at a distance outside the skirt wall, and a coupling hole is formed in a top wall between the two walls; A structure in which a coupling piece provided at a coupling portion of an upper lid is penetrated and coupled to a coupling hole is generally adopted (for example, Japanese Utility Model Laid-Open No. 63-126261, Japanese Utility Model Publication No. 4-54129, etc.). ).

[0004] However, the connection of such a structure is as follows.
The skirt wall of the cap body must have a double wall structure to provide a useless wall, and there is a disadvantage that the material cost and the molding cost increase. Further, the connecting portion is necessarily located outside the inner skirt wall, which is the bottle connecting wall of the cap body, and there are restrictions on size and design.

[0005]

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned conventional problems in a two-piece cap in which a cap body and an upper lid are formed separately, and has a structure in which a top wall surface of the cap body is provided. The upper lid and the cap body can be easily and firmly connected without forming a connection hole, the skirt wall of the cap body may be a single wall, and material and molding costs can be reduced. An object of the present invention is to provide a synthetic resin cap that can be formed inside a skirt wall and has a high degree of freedom in size and design.

[0006]

According to the present invention, there is provided a synthetic resin cap provided with a coupling portion having an uneven fitting means on the cap body, a coupling block provided on the upper lid via a hinge, and the coupling block having the coupling block. A solution to the above-mentioned problem by employing a technical means characterized by forming a coupling portion having a concave-convex fitting means for engaging and coupling with the concave-convex fitting means formed on the coupling portion of the cap body. It is.

The connecting portion of the cap body is formed by forming a concave surface extending to the skirt wall on the top wall of the cap body and forming a connecting projection on the concave surface, and forming the connecting portion formed on the connecting block of the upper lid. It is preferable that the portion is formed by forming a concave portion that fits into a coupling projection formed on the coupling portion of the cap body. Further, the coupling projection is constituted by an elliptical wall-shaped projection and columnar projections formed on both ends on the major diameter side of the elliptical wall-shaped projection, and a recess formed in a coupling portion of the upper lid is defined as an elliptical groove. By forming a pair of round holes formed at both ends on the major diameter side of the elliptical groove, positioning of the cap body and the upper lid is easy, and the coupling portion rotates or loosens even after the coupling. And stable bonding for long-term use is more desirable. Further, by forming an undercut portion on the outer peripheral surface of the elliptical wall-like projection and the inner peripheral surface of the elliptical groove, and engaging the undercut portions, it is desirable that a stronger connection can be obtained.

The hinge includes a main hinge having a bent portion at the 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, and one end provided at both ends of the main hinge and having one end formed on the outer periphery of the annular wall. It is not necessary to form a slit in the top wall of the upper lid, and the protrusion from the outer peripheral portion of the annular wall is constituted by a narrow strap hinge connected to the surface and the other end connected to the side wall surface of the connecting block. Less and safe and desirable.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. The cap according to the present embodiment includes two pieces, a cap body 1 having a container connecting portion and an upper lid 2 connected to the cap body, each of which is integrally formed of synthetic resin. The container body 1 is composed of a skirt wall 5 on which an internal screw 6 screwed to the container mouth is formed, and a top wall 7 on which the spout 3 is formed. A part 8 is provided. The connecting portion 8 is provided as shown in FIG.
As shown in FIG. 2, a substantially rectangular concave surface 9 extending to the skirt wall is formed on the top wall 7, and a coupling projection serving as an uneven fitting means is formed on the concave surface. In this embodiment, as the coupling projection, a hollow elliptical wall-shaped projection 10 is provided at the center of the concave surface 9, and columnar projections 11, 11 are provided on both sides of the projection 10.

In the present embodiment, an undercut 12 is formed at a corner portion of the outer peripheral surface of the elliptical wall-shaped projection 10 so as to be more firmly connected to a concave portion of an upper lid described later. In addition, the end portion 1 of the screw thread of the inner screw 6
As shown in FIGS. 1 and 2, 3 is formed in a truncated shape at right angles to the inner peripheral surface of the skirt wall and engages with a stopper projection formed on the container mouth so that the final screwing position is always The cap can be positioned at the same angle.

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 edges coincide with the outer peripheral edge of the top wall of the cap body, and a coupling block 22 is provided at the lower end of the annular wall. It is provided integrally via a hinge 25. In the present embodiment, the top wall 21 is formed to be larger in diameter than the annular wall 20, and the annular wall 20 is formed in an arch shape from the lower edge to the outer peripheral edge of the top wall 21 as shown in FIG. Although a curved surface is formed, the side where the coupling block 22 is located is a vertical wall surface 23 so as to substantially contact the outer diameter of the lower end of the annular wall.

The connecting block 22 is formed in a substantially rectangular block shape, and becomes a lower surface in a state where the connecting block 22 is inverted from the position shown in FIG. At the side, the coupling part 8 of the cap body
An elliptical groove 26 corresponding to the elliptical wall-shaped projection 10 and a pair of round holes 27, 27 corresponding to the columnar projection 11 are provided so as to be fitted with the concave-convex fitting means. Oval groove 2
6, an undercut (not shown) is formed so as to be coupled to an undercut 12 formed on the elliptical wall-shaped projection 10 of the cap body. The connection block 22 is shown in FIG.
As shown in the figure, the upper surface 24 is formed at a height corresponding to the upper surface of the top wall of the cap body 1 in a state of being fitted to the recessed surface 9 of the cap body, and the upper surface 24 is outside the step of the top wall 7. The fan-shaped surface 30 (FIG. 3) so that the peripheral edge 14 and the arc coincide with each other.
(D)) is formed.

The hinge 25 comprises a main hinge 28 and strap hinges 29, 29 arranged on both sides of the main hinge 28. The main hinge 28 has a bent portion at the boundary between the lower end of the vertical wall surface 23 and the upper end of the side wall of the connecting block. It is formed to a predetermined width,
The strap hinges 29, 29 are formed on both sides of the main hinge 28 with a narrow width. One end of the strap hinge is connected slightly above the lower end of the vertical wall, and the other end is connected to the side wall of the connecting block 22 below the main hinge 28,
The hinge portion is smoother than the conventional three-point hinge strap hinge and has a smaller degree of protruding outward from the outer peripheral surface of the annular wall. Also, since there is no slit in the top wall of the top lid, it does not impair the aesthetics,
The sealing of the top wall of the cap body is ensured and sanitary.

When the cap body 1 and the upper lid 2 are integrated, the connecting block 22 is rotated upward from the position shown by the two-dot chain line in FIG. This is a positioning stopper for preventing the upper lid 2 from protruding downward from the inner surface of the top wall 21 of the upper lid 2.

The cap of the present embodiment is constructed as described above, and the coupling block is folded back to the state shown by the two-dot chain line in FIG. The cap main body and the upper lid can be easily and firmly fitted by simply pressing the elliptical groove 26 and the round holes 27, 27 provided in the coupling block 22 of the upper lid 2 into the columnar projection 11 and fitting them. Can be integrated. At this time, the coupling block 22 is backed up by the positioning stopper 31, so that the concave and convex fitting of the coupling portion can be stably performed. Moreover, in the present embodiment, the coupling projection is formed by the elliptical wall-shaped projection and the columnar projection, and the coupling recess is formed by the elliptical groove and the round hole to be fitted therein, so that the positioning is ensured when the two are coupled. In addition, even after the coupling, the coupling portion is firmly integrated without displacement or backlash, and the cap body can be securely sealed with the upper lid. Further, since the undercut is provided at each of the joints of the elliptical wall-shaped protrusion and the elliptical groove, the joint is not easily separated after the fitting.

After the cap body and the upper lid are connected, as shown in the sectional view of FIG. 1, the top wall surface of the cap body and the upper surface of the connection block 22 are flush with each other in a state where the cap body and the upper lid are connected. In addition, since the outer peripheral edge of the step on the top wall 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 lid is outside the top wall with the upper lid closed. A stable state can be maintained by fitting to the peripheral edge and the fan-shaped outer peripheral surface.

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, so that the cap body needs to have a double wall structure. Cost can be reduced. Also,
In this embodiment, since the hinge is a two-piece structure while the hinge is a smooth hinge in which a slit is not formed on the top surface of the upper lid and the hinge part hardly protrudes outward, the shape of the skirt wall of the cap body is changed to the lower part. Can be molded into any shape, such as a mountain shape or an inverted taper shape,
A wide range of designs and sizes can be selected, and a cap with rich fashionability can be obtained.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea. For example, in the above-described embodiment, the engaging projections and recesses of the engaging portion are provided with the engaging projections on the cap body and the engaging recesses on the upper lid. It is also possible to provide. Further, the engagement projection is not necessarily limited to the elliptical wall-shaped projection and the columnar projection, but may be an elliptical wall-shaped projection alone or may be a coupling projection 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]

As described above, according to the synthetic resin cap of the present invention, the upper lid and the cap main body can be easily and firmly connected without forming a coupling hole in the top wall surface of the cap main body. Therefore, the skirt wall of the cap body may be a single wall, and the material cost and the molding cost can be reduced. In addition, the connecting portion can be formed inside the skirt wall of the cap body, and the size and design are free. A high degree cap can be obtained. By forming a recessed surface extending to the skirt wall on the top wall of the cap body and fitting the connection block to the recessed surface, the connection block of the upper lid is located within the top wall of the cap body after connection, so that the appearance is good. In addition, there are few protruding portions from the connecting portion, and it is safe.

Further, the coupling projection is constituted by an elliptical wall-shaped projection and a columnar projection, and the coupling recess is formed by an elliptical groove and a round hole to be fitted with the projection, so that the positioning is ensured when the two are coupled. Even after the coupling, the coupling portion is firmly integrated without displacement or play, and the cap body can be securely sealed with the upper lid. Furthermore, by providing undercuts at the joints of the elliptical wall-shaped projection and the elliptical groove, respectively, they do not easily come off after fitting.

Further, according to the present invention, it is possible to employ a smooth hinge in which a slit is not formed in the top surface of the upper lid and the hinge portion hardly protrudes outward, and the skirt wall of the cap body is a smooth hinge. Any shape such as a mountain shape can be adopted.

[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, wherein FIG. 2A is a front sectional view, FIG. 2B is a side view, and FIG.

3A and 3B show an upper cover of a synthetic resin cap according to an embodiment of the present invention, wherein FIG. 3A is a front sectional view, FIG.
(C) is a plan view, and (d) is a bottom view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cap main body 2 Top lid 5 Skirt wall 7 Top wall 8 Engagement part 9 Depressed surface 10 Elliptical wall-like projection 11 Cylindrical projection 12 Undercut 20 Annular wall 21 Top wall 22 Coupling block 23 Vertical wall surface 25 Hinge 26 Oval groove 27 Round Hole 28 Main hinge 29 Strap hinge

Claims (5)

[Claims] 1. A synthetic resin cap comprising a cap body and an upper lid, wherein the cap main body is provided with a coupling portion having concave and convex fitting means, and the upper lid is provided with a coupling block via a hinge, wherein the coupling block is provided. A synthetic resin cap formed with a concave and convex fitting means for fitting and coupling with the concave and convex fitting means formed on the coupling part of the cap body. 2. The connecting portion of the cap body is formed on a top wall of the cap body with a recessed surface extending to a skirt wall, and formed with a connection protrusion on the recessed surface, and formed on a connection block of the upper lid. 2. The coupling portion has a concave portion that fits into a coupling projection formed on the coupling portion of the cap body.
The synthetic resin cap as described. 3. The coupling projection comprises an elliptical wall-shaped projection and columnar projections formed at both ends of the major axis of the elliptical wall-shaped projection. 3. The synthetic resin cap according to claim 2, comprising an elliptical groove into which the projections are fitted, and a pair of round holes formed at both ends on the longer diameter side of the elliptical grooves and into which the columnar projections are fitted. 4. The synthetic resin cap according to claim 3, wherein an undercut portion is formed on an outer peripheral surface of the elliptical wall-like projection and an inner peripheral surface of the elliptical groove. 5. The main hinge, wherein 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 provided at both ends of the main hinge and one end being an outer periphery of the annular wall. 2. A narrow strap hinge which is connected to the surface and has the other end connected to the side wall surface of the connecting block.
5. The synthetic resin cap according to any one of items 4 to 4.