JPH07165249A - Cap - Google Patents

Abstract

PURPOSE:To increase the safety at the time when a cover body is opened, by erecting a protection wall so as to almost surround the periphery of a plug shaft from the rear face of cover body having a protrusive spherical shell and arranging the front end of front shaft so as to approach closer to the rear face of the cover body than the front end of the protection wall. CONSTITUTION:When a cover body 4 is raised upward from the state that the cover body 4 is closed by a cap 1, with a thumb inserted in a finger hook 16 of the cover body 4, fixing protrusions 15, 17 are disengaged and a plug shaft 13 is pulled out from an election hole 9. At the same time with the engagement, the cover body 4 is rotated at a stretch to the opening direction. Even if the thumb inserted in the finger hook 16 of the cover body 4 is led in the rear side of cover body with an impetus, at the finishing time of closing motion in this cap 1, since a protection wall 14 is installed around the plug shaft 13 and the plug shaft 13 is recessed from the protection wall 14, the front end of plug shaft 13 does never enter inside the claw of thumb and hence, it is extremely safe. Moreover, the protrusive spherical shell of the cover body increases the mechanical strength.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A cap of this kind is available in Japanese Utility Model Sho 55-2.
As disclosed in Japanese Patent No. 2348 and Japanese Utility Model Laid-Open No. 62-174059, a cap body fixed to the mouth of a container and a lid body rotatably supported by the cap body via a hinge portion. And a structure in which when the lid is closed, the plug shaft projecting from the back surface of the lid is inserted into the pouring hole provided in the top plate portion of the cap body in a liquid-tight state. There is something.

Since the lid of the conventional cap has a short, cylindrical top, the strength of the lid 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, which is disclosed in Japanese Utility Model Laid-Open No. 62-174059.

By the way, as a solution to the insufficient strength of the lid, it is considered that the shape of the lid is a convex spherical shell.

[0005]

However, if the lid body is formed into a convex spherical shell shape in this way, the length of the stopper shaft is unavoidably longer than in the conventional case, which causes a new problem.

That is, in general, when the lid is opened, the thumb is hooked on the front end of the lid and lifted. When the lid is opened, the thumb enters the back side of the lid, and the stopper shaft of the lid is the thumb. There is a risk of getting in between the nails. Particular care should be taken when the plug shaft is tightly fitted in the pouring hole of the cap body. In such a case, a large force is required to pull out the stopper shaft from the pouring hole, and moreover, when the stopper shaft comes out, the lid opens at a stretch, so the stopper shaft hits the finger strongly. Because it will be. In the past, since the stopper shaft was short, even if the stopper shaft hits the finger, the impact is small and it did not pose a problem.

The present invention has been made in view of the above problems of the conventional technique, and an object of the present invention is to provide a cap having improved safety when the lid is opened.

[0008]

The present invention has the following features to attain the object mentioned above. That is, the cap of the present invention has a cap body attached to the mouth of the container and a lid body rotatably supported by the cap body via a hinge portion, and when the lid body is closed, The plug shaft projecting from the back surface of the lid is a resin cap that seals the pouring hole provided in the top plate portion of the cap body, and in particular, the lid has a convex spherical shell shape, A protective wall is erected from the back surface so as to substantially surround the plug shaft, and the tip of the plug shaft is arranged closer to the back surface of the lid than the tip of the protective wall.

The convex spherical shell shape typically includes a shape obtained by dividing a sphere in half, and also includes a shape obtained by dividing an egg shape or a rugby ball shape in half. Further, as a typical example of the hinge portion, there is a so-called three-point hinge structure, but it is not limited thereto.

[0010]

[Function] Since the protective wall surrounds the stopper shaft and the tip of the stopper shaft is retracted inward from the tip of the protective wall,
When the lid is opened, the fingers hanging on the lid hit the protective wall but not the stopper shaft. Therefore, the stopper shaft is not inserted between the fingernails.

[0011]

Embodiments of the present invention will be described below with reference to the drawings of FIGS. 1 is a sectional view showing a state in which a lid of a cap 1 of the present invention is opened, FIG. 2 is an enlarged sectional view of an essential part thereof, FIG. 3 is a plan view of the same, and FIG. 4 shows a lid closed. It is a sectional view showing the state where it was opened.

The cap 1 is made of a resin such as polypropylene, and is rotatably supported by a cap body 2 mounted on the mouth (not shown) of the container and a hinge portion 3 on the cap body 2. And a 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 portion. A spout cylinder 8 projects from the center of the upper surface of the top plate portion 7 of the cap body 2, and a spout hole 9 is provided in the spout cylinder 8. From the back surface of the top plate portion 7, a fitting ring 10 that fits into the spout of the container mouth portion projects.

A hinge portion 3 is provided on one side of the upper end of the cap body 2. The hinge part 3 is a so-called three-point hinge and is composed of a pair of thin wall hinge parts 3a and an elastic arm part 3b provided between the thin wall hinge parts 3a.

The lid 4 supported by the hinge 3 has a substantially hemispherical shell shape (convex spherical shell shape), and the stopper shaft 13 vertically stands up from the center of the back surface 4a of the lid body 4 and projects. A protective wall 14 is erected and protrudes concentrically with the stopper shaft 13 so as to surround the stopper shaft 13. The protective wall 14 is interrupted at the base portion of the elastic arm portion 3b of the hinge portion 3 and has a C shape.

As shown in the enlarged sectional view of FIG.
Is a large-diameter taper shaft portion 1 extending from the back surface 4 a of the lid body 4.
The curved taper shaft portion 13b having a concave curved surface is connected to 3a, the small diameter straight shaft portion 13c is further connected, and the small diameter taper shaft portion 13d having a flat tip is connected.

The height dimension H ₁ of the plug shaft 13 from the center of the back surface 4a of the lid 4 is smaller than the height dimension H ₂ of the protection wall 14, and the tip of the plug shaft 13 is slightly inside the protection wall 14. It is located in a retracted position.

A hinge portion 3 is provided on the peripheral portion of the back surface 4a of the lid body 4.
3 locking projections (locking parts) 15 every 90 degrees in the circumferential direction
Is provided, and a finger hooking portion 16 is projectingly provided on a portion of the peripheral portion 4b of the surface of the lid body 4 opposite to the hinge portion 3.

On the other hand, on the peripheral edge of the upper end of the cap body 2, three locking protrusions (locking portions) 17 are provided at every 90 degrees in the circumferential direction from the hinge portion 3, and the locking protrusions 15 of the lid 4 are provided.
Can be disengaged from. Further, in the portion of the peripheral wall portion 5 of the cap body 2 on the side opposite to the hinge portion 3,
A recessed portion 18 that is recessed more than other portions of the peripheral wall portion 5 is formed so that a finger can be easily placed on the finger rest 16 when the lid 4 is closed.

When the lid 4 of the cap 1 is closed, the locking projection 15 of the lid 4 is closed by the cap body 2 as shown in FIG.
, The small diameter straight shaft portion 13c of the plug shaft 13 enters the pouring hole 9 of the cap body 2, and the curved taper shaft portion 13b closely contacts the pouring hole 9 and the pouring hole 9 Seal. Since the lid 4 has a convex spherical shell shape, the mechanical strength against the inward force applied to the lid 4 is extremely high.

From this state, when the thumb is put on the finger-holding portion 16 of the lid body 4 and the lid body 4 is lifted up, the engagement between the locking projections 15 and 17 is released and the plug shaft 13 is poured out. Exit through hole 9. Simultaneously with this disengagement, the lid body 4 rotates at once in the opening direction.

In this cap 1, the finger rest 1 of the lid 4 is
Even if the thumb hung on 6 enters the back side of the lid body 4 at the end of the opening operation, the protective wall 14 is provided around the stopper shaft 13, and the stopper shaft 13 protects the stopper wall 1.
Since it is retracted more than 4, the tip 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 the inward force applied to the lid can be made extremely high.

Further, since the protective wall is provided so as to surround the stopper shaft on the back surface of the lid body and the tip of the stopper shaft is retracted from the protective wall, the finger enters the inside of the lid body when the lid body is opened. Even so, the tip of the stopper shaft does not enter between the nails of the fingers, and the excellent effect that the safety can be improved is exhibited.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an open state of a lid 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 in which a lid of the cap is opened.

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

[Explanation of symbols]

 1 Cap 2 Cap body 3 Hinge part 4 Lid body 4a Back surface 7 Top plate part 9 Pouring hole 13 Plug shaft 14 Protective wall 15, 17 Locking part

Claims (2)

[Claims] 1. A cap body attached to a mouth part of a container, and a lid body rotatably supported by the cap body via a hinge portion. When the lid body is closed, the lid body In a resin cap in which a plug shaft protruding from the back surface seals a pouring hole provided in a top plate portion of the cap body, the lid body has a convex spherical shell shape, and the back surface of the lid body surrounds the plug shaft. A protective wall is erected so as to substantially surround the cap, and the tip of the stopper shaft is arranged closer to the back surface of the lid than the tip of the protective wall. 2. The plurality of locking portions which can be engaged and disengaged from each other are provided in the upper portion of the cap body and the peripheral portion of the back surface of the lid body so as to be spaced apart from each other in the circumferential direction. Cap.