JPH07285571A - Apparatus for closing can mouth - Google Patents

Abstract

PURPOSE:To position a lower end of an auxiliary opening groove above a part of a side wall to be expanded by providing the auxiliary opening groove corresponding to an upper part of an opening groove. CONSTITUTION:By pulling up a tab piece 2f with a finger, a sealing member 2 can be extremely broken from an upper end of an opening groove to a lower end of an auxiliary opening groove, and further by pulling the tab piece 2f with a finger, an upper part of a side wall 2b of the sealing member 2 and a flange part 2c can be easily deformed inward, so that the sealing member 2 can be removed from a lid body 1. At the same time, since the lower end of the auxiliary opening groove is only positioned above a part to be expanded, a part between the opening groove and the auxiliary opening groove may not be broken when the side wall 2b of the sealing member 2 is expanded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can mouth closing device for petroleum cans, paint cans and the like.

[0002]

2. Description of the Related Art As a conventional can mouth closing device, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Publication No. 57755, a synthetic resin plug body including a bottom wall portion, a side wall portion, and a flange portion is provided with a bottom wall portion,
Side wall portion, a metal sealing member consisting of a flange portion is fitted to form a can lid, and a knob is provided on the bottom wall portion of the sealing member,
Opening grooves are provided so as to extend from the bottom wall portion to the lower end portion of the side wall portion corresponding to both sides of the base of the knob, and the central portion of the side wall portion from the center side with the can lid fitted in the can mouth. It is known to open and engage with the can mouth.

[0003]

SUMMARY OF THE INVENTION In the conventional can mouth closing device, the knob of the sealing member is pulled by a finger to break the sealing member to the lower end of the side wall of the sealing member by using the opening groove, and then the pulling member is further pulled. The upper side wall is deformed inward to remove the sealing member, and then the stopper is removed.When the knob of the sealing member was pulled upward with a finger, the side wall of the sealing member was expanded. There has been a problem that the portion becomes a great resistance and the picking piece is broken at this portion, and the sealing member cannot be removed from the can mouth portion. Further, there is a problem that a large force is required to deform the side wall portion of the sealing member inward with the knob.

[0004]

The present invention has been made to solve the above problems, and is a synthetic resin plug body composed of a bottom wall portion (1a), a side wall portion (1b), and a flange portion (1c). A metal closure member (2) consisting of a bottom wall portion (2a), a side wall portion (2b), and a flange portion (2c) is fitted into (1) to form a can lid (4), and the closure member (2 ) Bottom wall (2
a) is provided with a tab (2f), and opening grooves (2j), (2k) are provided at the lower end of the side wall (2b) from the bottom wall (2a) corresponding to both sides of the root of the tab (2f). And the can lid (4) is fitted into the can mouth (5), the side walls (1b) and (2b) of the can lid (4) are opened from the center to the can mouth (5). In the can mouth closing device which is engaged,
An auxiliary opening groove (21) is provided above the opening groove (2k) in the side wall portion (2b) of the sealing member (2),
The can end closing device is characterized in that the lower end of the auxiliary opening groove (21) is located above the portion of the side wall (2b) of the sealing member (2) to be expanded. .

[0005]

According to the can mouth closing device of the present invention, the opening groove (2) reaching the lower end of the side wall (2b) of the sealing member (2) is provided.
The auxiliary unsealing groove (21) is provided on the side wall portion (2b) of the sealing member (2) above the side wall portion (2) in correspondence with the side wall portion (2).
Since the lower end of the auxiliary opening groove (21) is located at the upper part of the expanded portion of b), the upper end of the opening groove (2k) is pulled by pulling the knob piece (2f) upward with a finger. Can be extremely easily broken to the lower end of the auxiliary opening groove (21). Further, if the knob (2f) is pulled with a finger, the side wall portion (2c) of the sealing member (2) and the side wall portion (2c) less than the upper end of the auxiliary opening groove (21) and the flange portion (2c) can be easily moved inward. Deformed into a sealing member (2)
Can be removed from the plug (1). In addition, since the lower end of the auxiliary opening groove (21) is located only above the portion to be opened, the auxiliary opening groove (21) is located between the opening groove (2k) and the auxiliary opening groove (21). It does not break and retains a sufficient sealing function.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The synthetic resin plug body 1 is composed of a bottom wall portion 1a, a side wall portion 1b, and a flange portion 1c. A downward recess 1d is formed in the center of the bottom wall 1a, and a ring-shaped knob 1e is formed in the recess 1d. The outer diameter of the upper portion 1b ′ of the side wall portion 1b of the stopper 1 is set to be slightly larger than the inner diameter of the can mouth 5, and the lower portion 1b ″ of the side wall portion 1b is set to be slightly smaller than the inner diameter of the can mouth 5. The mountain portion 1f protruding outward is formed at the boundary portion of the outer surface, and the inward protruding portion 1g is formed at the inner surface boundary portion.
The metal sealing member 2 such as aluminum tin plate is composed of a bottom wall portion 2a, a side wall portion 2b, and a flange portion 2c. The central portion 2a 'of the bottom wall portion 2a projects upward and can accommodate the upper portion of the knob 1e of the plug 1. A ring-shaped knob 2f is formed in the protruding portion of the bottom wall 2a of the sealing member 2 by the kerf 2d and the circular space 2e.
Are formed. Bent portions 2g and a sealing member 2h are formed by bending the inner and outer peripheral edges of the knob piece 2f to the lower surface side. The side wall 2b of the sealing member 2 is formed with a convex portion 2i projecting outward over the entire circumference. This convex portion 2
The outer diameter of i is set to be larger than the inner diameter of the mountain portion 1g. 2 corresponding to both sides of the root of the pick 2f of the sealing member 2
The strip opening groove 2j and the strip opening groove 2k are provided so as to extend from the bottom wall portion 2a to the lower end portion of the side wall portion 2b (immediately below the convex portion 2i). Corresponding to the unsealing groove 2j and the unsealing groove 2k, an auxiliary unsealing groove 21 is provided in the side wall portion 2b above the convex portion 2i. The auxiliary opening groove 21 is formed in an inverted V shape so as to widen upward. Thus, the sealing member 2 is fitted in the plug body 1 and the convex portion 2i of the sealing member 2 is positioned below the convex portion 2i by utilizing the elasticity of the mountain portion 1g, thereby forming the can lid 4. The stopper 1 and the sealing member 2 will not come off during transportation or the like due to the locking relationship between the mountain portion 1g and the convex portion 2i. Next, the can lid 4 is fitted into the can mouth 5.
At this time, since the lower portion 1b ″ of the side wall portion 1b of the stopper 1 is set to be slightly smaller than the inner diameter of the can mouth 5, the lower portion 1b ″ is easily fitted and the ridge portion 1f abuts the can mouth 5. It is first set in a horizontal state. When the can lid 4 is pushed further downward from this state, the mountain portion 1f and the upper portion 1b ″ of the side wall portion 1b are elastically deformed and fitted into the can mouth 5 to become the state of FIG. 1, the central portion of the side wall portion 1b and the side wall portion 2b is expanded from the inside by the expansion device 6 as shown in FIG. The expansion device 6 includes an expansion claw 6a ', a pressing member 6b, and a pressing guide 6c. The expansion claw 6a is lifted by pulling up the pressing member 6b.
Is expanded and the side wall portion 1b and the side wall portion 2b are expanded. The tip of the expanding claw 6a coincides with the convex portion 2i of the sealing member 2, and the expansion of the 2d can be smoothly performed. Although the side wall 2b of the sealing member 2 is plastically deformed, the side wall 1b of the plug 1 is elastically deformed,
When the sealing member 2 is opened, the side wall portion 1b of the stopper 1 is restored and the stopper 1 can be easily removed from the canister 5.

According to such a can closing device, the sealing member 2
The auxiliary unsealing groove 21 is provided on the side wall 2b of the sealing member 2 above the unsealing groove 2k reaching the lower end of the side wall 2b, and the auxiliary unsealing groove 21 is provided above the part where the side wall 2b is expanded. Since the lower end of the opening groove 21 is positioned, the knob 2
By pulling f upward with a finger, it is possible to very easily break from the upper end of the opening groove 2k to the lower end of the auxiliary opening groove 21. Furthermore, if you pull the knob 2f with your finger,
The sidewall portion 2b of the sealing member 2 above the upper end of the auxiliary opening groove 21 and the remaining sidewall portion and the flange portion 2c are easily deformed inward, and the sealing member 2 can be removed from the plug body 1. Further, since the lower end of the auxiliary opening groove 21 is located only above the expanded portion, the gap between the opening groove 2k and the auxiliary opening groove 21 may be broken when the auxiliary opening groove 21 is expanded. Instead, it retains sufficient sealing function. Moreover, since the auxiliary unsealing groove 21 is formed so as to expand upward, the width of the remaining portion of the side wall portion 2b and the deformed portion of the flange portion 2c becomes wider, and from this point, the deformation is further promoted. It is something.

[0008]

According to the present invention, by pulling the picking piece (2f) upward with a finger, it is extremely easy to break from the upper end of the opening groove (2k) to the lower end of the auxiliary opening groove (21). If you pull the knob (2f) with your finger,
Auxiliary opening groove (2) on the side wall portion (2b) of the sealing member (2)
The side wall portion above the upper end of 1) and the flange portion (2c) which are less remaining can be easily deformed inward, so that the sealing member (2) can be removed from the plug body 1, and the lower end of the auxiliary opening groove (21) is Since the side wall portion (2b) of the sealing member (2) is expanded, the groove (2k) for opening and the groove (21) for opening the auxiliary opening are fitted to each other. It is possible to provide a can closure device that is not broken.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a can mouth closing device of the present invention in an expanded state.

FIG. 2 is a vertical cross-sectional view of the can mouth closing device of the present invention in a can mouth attached state.

FIG. 3 is a plan view of a can lid used in the can mouth closing device of the present invention.

FIG. 4 is a side view of a can lid used in the can mouth closing device of the present invention.

FIG. 5 is a second view of a can lid used in the can mouth closing device of the present invention.
FIG.

[Explanation of symbols]

Plug body ... 1, bottom wall portion ... 1a, side wall portion ... 1b, flange portion ...
1 c, knob piece ... 1 e, sealing member ... 2, bottom wall portion ... 2 a, side wall portion ... 2 b, flange portion ... 2 c, knob piece ... 2 f, opening groove ... 2 j, opening groove ... 2 k, auxiliary opening groove ... 21, can lid… 4, can mouth… 5

Claims (1)

[Claims] 1. A synthetic resin plug body (1) comprising a bottom wall portion (1a), a side wall portion (1b) and a flange portion (1c), and a bottom wall portion (2a), a side wall portion (2b) and a flange portion. A metal sealing member (2) made of (2c) is fitted to form a can lid (4), and a knob (2) is attached to the bottom wall (2a) of the sealing member (2).
f) is provided, and opening grooves (2j) and (2k) are provided so as to correspond to both sides of the base of the knob piece (2f) from the bottom wall portion (2a) to the lower end portion of the side wall portion (2b). The can lid (4)
With the side wall (1b) fitted in the can mouth (5),
In a can mouth closing device which is formed by expanding a central portion of (2b) from the center side and engaging with the can mouth (5), the opening groove (2
The auxiliary opening groove (21) is provided on the side wall portion (2b) of the sealing member (2) above the side wall portion (2b) of the sealing member (2) so as to correspond to (k). Can end closing device, characterized in that the lower end of the auxiliary opening groove (21) is located at the upper part.