JPH0630699Y2 - Bottle cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cap such as a PET bottle.

[Conventional technology]

Conventionally, a bottle cap is often used as shown in Japanese Utility Model Laid-Open No. 61-27843. As shown in FIG. 5, the cap described in this publication has a packing 30 for holding a hermeticity on the lower surface of the top plate 11 of the cap.
Is provided and the cap is strongly pressed against the top surface 3 of the bottle mouth 2 and the lower portion of the cap is wound around the bottle mouth 2 and the like.

The conventional cap shown in FIG. 5 is not a problem when used in a bottle in which pressure is not applied to the bottle, but after the bottle is filled with the content liquid and capped, the content liquid is heated and sterilized. In the case where it is done (generally, the bottle is filled with the content liquid and heated and sterilized after capping for about 30 minutes at 120 ° C), the packing 30 is deformed due to poor heat resistance and shrinkage, etc. There was a lack of sex.

Therefore, in order to maintain the hermeticity, as shown in FIG.
Since the packing 30 is pressed into contact with the top surface 3 of the bottle mouth 2 from inside and outside, the portion of the top plate 11 of the cap located on the inner circumference of the bottle mouth 2 can be recessed annularly to form the recess 12. Has been done.

Then, in order to form the recess 12, a capping machine different from the ordinary capping machine is required.

[Problems to be solved by the device]

In the conventional example as shown in FIG. 6, since the recess 12 is formed in the top plate 11 of the cap, water and dust are likely to accumulate, which is not hygienic, and the design is good when viewed from the entire bottle. There is no such thing.

The present invention has been made in view of the above matters, and has a technical problem to provide a cap in which the top plate of the cap is formed flat so that the sealing performance of the packing can be improved.

[Means for Solving the Problems]

The present invention has the following configuration in order to solve the above technical problems.

That is, the metal cap body in which the top plate 11 is formed in a flat plate shape.
A liner 15 having a flat disc shape as a whole is adhered to the lower surface of 10, and a concavo-convex portion 16 is formed on the outer peripheral edge of the liner 15. Then, silicone, Teflon, etc. is formed on the outer periphery of the liner 15. The heat-resistant resin-made annular packing 20 is externally fitted, and the convex and concave portions 21 formed on the inner peripheral edge of the annular packing 20 are formed on the outer peripheral edge of the liner 15.
A cap for a bottle fitted and fixed to 16 was used.

[Action]

As shown in FIG. 1, the bottle cap of the present invention is provided with a disc-shaped liner 15 adhered to the lower surface of a metal (for example, aluminum) cap body 10 having a top plate 11 formed in a flat plate shape. Therefore, the annular packing 20 fitted and fixed to the outer peripheral edge of the liner 15 is held on the lower surface of the cap body 10. Since the annular packing 20 is made of resin such as silicone and Teflon that has heat resistance and retains cushioning properties, after capping, the bottle is heated as shown in FIG.
Deformation of the top surface 3 of the bottle mouth 2 even if the temperature is high for sterilization
The sealing effect can be maintained regardless of shrinkage. Further, since the top plate 11 has a flat shape without forming the concave portion 12 on the top surface, water and dust do not collect on the top surface of the cap.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

<First Embodiment> FIGS. 1 and 2 show a first embodiment of the present invention. This bottle cap is a top plate of a cap body 10 made of aluminum.
11 is formed in a flat plate shape, and a polyethylene liner 15, which is a synthetic resin having disc-like flexibility and good adhesiveness, is adhered to the lower surface of the top plate 11, and the outer peripheral edge portion of the liner 15 is The step-like uneven portion 16 is formed, and this step-like uneven portion is formed.
A ring-shaped packing 20 made of heat-resistant resin such as silicone or Teflon, which retains cushioning properties even at high temperatures (120 ° C), is fitted on the outer peripheral edge of 16 to form a ring-shaped packing.
The convex-concave concave and convex portions 21 formed on the inner peripheral edge of the liner 20 are fitted and fixed to the concave-convex portion 16 formed on the outer peripheral edge of the liner 15.

<Second Embodiment> FIGS. 3 and 4 show a second embodiment. The same parts as those in the previous embodiment are designated by the same reference numerals and the description thereof is omitted. In this embodiment, the concave and convex portions 16 on the outer peripheral edge of the liner 15 and the convex and concave portions 21 on the inner peripheral edge of the annular packing 20 are V-shaped. The annular packing 20 having the V-shaped fitting and fixing portions has the same shape on the front and back sides.
Can be used as packing on the top surface 3 of the.

[Effect of device]

The present invention is a cap body 10 in which a top plate 11 is formed in a flat plate shape.
Since the disc-shaped liner 15 is adhered to the lower surface of the liner 15, the ring-shaped packing 20 that is fitted and fixed at the outer peripheral edge of the liner 15 has poor adhesiveness by itself, but the cap body itself is poor. Securely held on the underside of 10. Since the annular packing 20 is made of a resin such as silicone or Teflon that has heat resistance and retains cushioning properties, the bottle mouth 2 can be heated even after being capped and heated to sterilize the bottle.
The sealing effect can be maintained regardless of the deformation and contraction of the top surface 3 of the. Furthermore, since the top plate 11 has a flat shape without forming the recess 12 on the top face, it is sanitary without water and dust accumulating on the top face of the cap, and has a good appearance, and the conventional example is the top plate 11 of the cap. Although a capping machine different from an ordinary capping machine is required to form the concave portion 12 in, the cost is low because it is not necessary.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a main part of a cap before capping of the first embodiment,
FIG. 2 is a vertical sectional view of the main part of the cap after capping, FIG. 3 is a vertical sectional view of the main part of the cap before capping of the second embodiment, and FIG. 4 is a vertical sectional view of the main part of the cap after capping. FIGS. 5 and 5 are vertical cross-sectional views of the cap after the cap is cut according to the conventional example, and FIG. 6 is a vertical cross-sectional view of the cap after the cap is cut according to another conventional example. 10 …… Cap body, 11 …… Top plate, 15 …… Liner, 16 …… Uneven part, 20 …… Ring packing, 21 …… Uneven part.

Continuation of the front page (72) Takayuki Yoshizawa 1200, Kamiotsuka, Fujioka-shi, Gunma Inside the Fujioka Plant, Yoshino Industrial Co., Ltd. (56) Bibliographic references Sho 59-126962 (JP, U) Sumitomo Sho 61-34277 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A liner in the form of a disc that is flat as a whole on the lower surface of a metal cap body 10 having a top plate 11 formed in a flat plate shape.
The liner 15 is provided by adhesion, and the concavo-convex portion 16 is formed on the outer peripheral edge portion of the liner 15, and the ring-shaped packing 20 made of heat-resistant resin such as silicone or Teflon is externally fitted to the outer periphery of the liner 15. A bottle cap in which a convex-concave portion 21 formed on the inner peripheral edge portion of the annular packing 20 is fitted and fixed to a concave-convex portion 16 formed on the outer peripheral edge portion of the liner 15.