JP3245286B2 - cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin cap attached to a mouth of a container.

[0002]

2. Description of the Related Art A cap of this kind includes a Japanese utility model 55-22348.
And a lid body rotatably supported on the cap body via a hinge, as disclosed in Japanese Unexamined Patent Publication No. Having a structure in which, when the lid is closed, a plug shaft protruding from the back surface of the lid is inserted in a liquid-tight state into a pouring hole provided in a top plate portion of the cap body. There is.

[0003] Since the lid of the conventional cap has a short-topped cylindrical shape, the strength is weak when a force is applied to the center of the top plate from above. One means for solving this problem is a reinforcing rib provided on the back surface of the lid, as disclosed in Japanese Utility Model Laid-Open No. 62-174059.

Meanwhile, as a solution to the insufficient strength of the lid, it is conceivable to make the shape of the lid a convex spherical shell.

[0005]

However, when the lid is formed in a convex spherical shell shape in this manner, the length of the plug shaft must be longer than in the prior art, which causes a new problem.

[0006] That is, generally, when the lid is opened, the thumb is hooked and lifted to a finger hook projection provided at the lower end of the front surface of the lid. The lower end of the plug shaft of the lid having a small outer diameter may enter between the nails of the thumb and damage the thumb. Special care must be taken when the plug shaft is tightly fitted into the spout hole of the cap body. In such a case,
Large force is required to pull out the plug shaft from the pouring hole,
In addition, when the plug shaft comes off, the lid is opened at a stretch, and the contact of the plug shaft with the finger becomes stronger. Conventionally, the plug shaft was short, so that even if the plug shaft hit a finger, the impact was small and did not pose a problem.

[0007] The present invention has been made in view of such problems of the conventional art, and has as its object to provide a cap with improved safety when opening the lid.

[0008]

As a first means, a cap body to be attached to the mouth of a container, and a rotatably supported rear portion of the cap body via a hinge portion, which is detachably fitted to an upper portion of the cap body. At least a small-diameter plug shaft hanging down from the back surface of the lid when the lid is closed seals the pouring hole formed in the top plate of the cap body, and has a front surface of the lid. In the cap made of a synthetic resin having a finger-opening projection for opening at the lower end of the cap, the lid is formed in a convex spherical shell shape, and the protective wall surrounds at least the first half of the plug shaft and extends below the lower end of the plug shaft. Drooped.

As a second means, there is provided the first means, and at the upper outer surface of the cap body and the inner edge of the lower end of the lid, engaging portions which can be disengaged from each other are circumferentially separated from each other. A plurality was provided.

[0010]

[Function] A protective wall surrounds at least the first half of the plug shaft,
In addition, since the lower end of the protective wall is hung down below the lower end of the plug shaft, when the lid is opened, the finger hanging on the finger hook projection on the front lower end of the lid hits the protective wall but hits the plug shaft. Does not hit. Therefore, the lower end of the plug shaft is not inserted between the fingernails.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing a state in which a cover of a cap 1 of the present invention is opened, FIG. 2 is an enlarged sectional view of a main part thereof, FIG. 3 is a plan view of the same, and FIG. FIG. 4 is a cross-sectional view showing a state in which the cover is folded.

The cap 1 is made of a resin such as polypropylene, and is rotatably supported via a hinge 3 at the rear of the cap main body 2 attached to a mouth (not shown) of the container. Lid 4.

On the inner surface of the peripheral wall portion 5 of the cap body 2, there is provided a female screw portion 6 which is screwed into a male screw on the outer peripheral surface of the container mouth. A pouring cylinder 8 protrudes from the center of the upper surface of the top plate 7 of the cap body 2, and a pouring hole 9 is provided in the pouring cylinder 8. A fitting ring 10 that fits into the spout of the container mouth projects from the back surface of the top plate 7.

A hinge portion 3 is provided at the rear of the upper end of the cap body 2. The hinge portion 3 is a so-called three-point hinge, and includes a pair of thin hinge portions 3a and a thin hinge portion.
And an elastic arm portion 3b provided between 3a.

The lid 4 supported by the hinge 3 has a substantially hemispherical shell shape (convex spherical shell shape). When the lid is opened, the upper portion from the center of the back surface 4a of the lid 4 has a small outer diameter. The plug shaft 13 stands upright and protrudes vertically, and a protective wall 14 stands up and protrudes so as to surround the plug shaft 13 concentrically with the plug shaft 13. The protective wall 14 is interrupted at the base of the elastic arm 3b of the hinge 3 and has a C-shape.

As shown in the enlarged sectional view of FIG.
Is a large-diameter tapered shaft portion 13a extending from the back surface 4a of the lid 4.
A curved tapered shaft 13b having a concave curved surface is connected to the shaft, a small straight shaft 13c is further connected to the shaft, and a small diameter tapered shaft 13d having a flat end is connected.

The height H ₁ of the plug shaft 13 from the center of the back surface 4 a of the lid 4 is smaller than the height H ₂ of the protective wall 14,
The tip of the shaft plug 13 is located slightly inside the protective wall 14.

At the peripheral edge of the back surface 4a of the lid 4, three locking projections (locking portions) 15 are provided at every 90 degrees in the circumferential direction from the hinge portion 3, and the peripheral edge 4b on the surface of the lid 4 is provided. In FIG. 4, a finger-hanging projection 16 is provided at a portion opposite to the hinge portion 3, that is, at a lower end of the front surface when closed as shown in FIG.

On the other hand, on the peripheral edge of the upper end of the cap body 2, three locking projections (locking portions) 17 are provided every 90 degrees in the circumferential direction from the hinge portion 3, and the locking projections 15 of the lid 4 are provided. Can be disengaged. Also, on the front surface of the peripheral wall 5 of the cap body 2 opposite to the hinge 3,
A concave portion 18 is formed which is recessed from the other portion of the peripheral wall portion 5 so that a finger can be easily hooked on the finger hanging protrusion 16 when the lid 4 is closed.

In the cap 1, when the lid 4 is closed, the locking projection 15 of the lid 4 engages with the locking projection 17 of the cap body 2 as shown in FIG. 13c
Penetrates into the pouring hole 9 of the cap body 2, and the curved tapered shaft portion 13b closely contacts the pouring hole 9 to seal the pouring hole 9. Since the lid 4 has a convex spherical shell shape, the mechanical strength against an inward force applied to the lid 4 is extremely high.

In this state, when the user puts his / her thumb on the finger hook projection 16 of the lid 4 and lifts the lid 4 upward, the locking projection
15 and 17 are disengaged, and the plug shaft 13 is
Get out of. Simultaneously with the disengagement of the engagement, the lid 4 rotates in the opening direction at a stretch.

In this cap 1, the finger hook projection of the lid 4
Even if the thumb hung on 16 enters the back side of the front part of the lid 4 with excessive force at the end of the opening operation, the protective wall 14 is provided around the plug shaft 13 and moreover than the plug shaft 13. Protective wall
Since 14 is suspended downward, the lower end of the plug shaft 13 does not enter between the nails of the thumb, which is extremely safe.

[0023]

As described above, according to the present invention,
Since the lid has a convex spherical shell shape, the mechanical strength against an inward force applied to the lid can be extremely high.

Also, a protective wall is provided so as to surround at least the first half of the plug shaft on the back surface of the lid, and the lower end of the small outer diameter plug shaft is located above the lower end of the protective wall.
Even if a finger enters the inside of the lid when the lid is opened, the superior effect that the lower end of the plug shaft does not enter between the fingernails can be improved, which can improve safety. You.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a lid is opened in an embodiment of a cap according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the cap.

FIG. 3 is a plan view showing a state where a lid of the cap is opened.

FIG. 4 is a sectional view showing a state in which a lid of the cap is closed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cap 2 Cap body 3
Hinge part 4 Lid 4a Back 7
Top plate 9 Injection hole 13 Plug shaft 14
Protective wall 15,17 Locking part 16 Finger hook

Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 47/08

Claims (2)

(57) [Claims] 1. A cap body to be attached to a mouth of a container, and a lid body rotatably supported at a rear portion of the cap body via a hinge portion and detachably fitted to an upper portion of the cap body. At the time of closing the lid, at least a small-diameter plug shaft that hangs down from the back of the lid seals the pouring hole formed in the top plate of the cap main body, and has a finger hook for opening at the lower end of the front surface of the lid. Wherein the lid is formed in a convex spherical shell shape, and the protective wall is formed to surround at least the first half of the plug shaft and to hang down below the plug shaft lower end. cap. 2. A plurality of engaging portions which can be engaged and disengaged from each other are provided on an upper outer surface of the cap main body and an inner edge of a lower end of the lid so as to be circumferentially separated from each other. Cap.