JP3762096B2 - Cap for container fitting - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container body fitting cap to be fitted to a container body neck.
[0002]
[Prior art]
The cap for fitting the container body is usually provided with a packing on the outer periphery of the lower surface of the top wall of the cap so that the mouth of the container body can be sealed when the cap is fitted. It is provided so as to be airtightly sandwiched between the top wall and the outer periphery.
[0003]
[Problems to be solved by the invention]
Since the cap packing is usually formed of a bowl-shaped elastic plate, repeated tightening of the cap repeatedly collapses the packing and loses its elasticity, and thus the hermetic sealing may be incomplete. .
[0004]
According to the present invention, an elastic basin-like member for sealing the container body mouth is provided in the upper part of the peripheral wall of the cap, and an airtight air chamber is provided between the member and the top wall of the cap. When tightened to the outer surface, the bottom surface of the bottom of the deep plate-like member seals the container body mouth and the air chamber is squeezed, and the air chamber is elastically restored by removing the cap so that the airtightness when the cap is fitted It is provided so that a good sealing performance can be maintained for a long time.
[0005]
[Means for Solving the Problems]
As a first means, a cap body 1 that hangs the peripheral wall 3 from the outer periphery of the top wall 2;
It was fixed into the upper part of the cap body, having a bottom wall 12 of the container body mouth or pouring hole for sealing, an elastic bowl-shaped member 11 Prefecture,
A cylindrical piston 5 having a cylinder 18 from one of the central part of the top wall 2 of the cap body and the central part of the bottom wall 12 of the deep plate-like member and a cylindrical piston 5 having a large outer diameter from the other end; The cylindrical piston tip portion was fitted into the cylinder tip portion in an airtight and slidable manner, and the cylinder and the cylindrical piston formed an airtight second air chamber 19 .
[0006]
As a second means , an airtight first air chamber 17 is formed by the first means and the upper part of the cap body and the deep dish-like member 11 .
[0007]
As a third means, the center or top of the bottom wall 12 is provided from one of the center of the cap main body top wall 2 and the center of the deep dish-like member bottom wall 11 and the first or second means. The elastic rod 16 was erected with the tip close to the center of the wall 2.
[0008]
As a fourth means, the holding cylinder 4 is suspended from the lower surface of the outer peripheral portion of the cap main body top wall 2 as well as the first, second, or third means, and is attached to the upper end of the peripheral wall 13 of the deep dish member. The fitting cylinder 15 was erected from the outward flange 14 and the fitting cylinder 15 was fitted and fixed in the gap between the sandwiching cylinder 4 and the peripheral wall 3.
[0009]
As a fifth means, the cap body 1 has the first, second, third or fourth means, and the outer peripheral portion is fitted and fixed to the peripheral wall 3 of the upper end surface opening and the upper end portion of the peripheral wall. The deep dish member 11 is formed by connecting the outer periphery of the outward flange 14 attached to the upper end of the peripheral wall 13 of the member to the upper inner surface of the peripheral wall 3 of the cap body.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
First, the embodiment shown in FIGS. 1 and 2 will be described. Reference numeral 1 denotes a cap body that hangs the peripheral wall 3 from the outer periphery of the top wall 2 and is integrally formed of a synthetic resin material. The peripheral wall is formed in the female thread cylinder so that the outer wall of the container body neck can be screwed. The sandwiching cylinder 4 is suspended by forming a small gap between the lower surface of the outer peripheral portion of the top wall 2 and the inner surface of the upper portion of the peripheral wall. A deep dish-like member 11 having elasticity for sealing the container mouth is fitted into the upper part of the cap body. The member erects the peripheral wall 13 from the outer peripheral portion of the bottom wall 12 and projects the outward flange 14 from the upper end of the peripheral wall. The outward flange is airtightly fitted to the upper inner surface of the cap body. In order to perform the airtight fitting, in the illustrated example, the fitting cylinder 15 that fits into the small gap is raised from the upper surface of the outward flange, and both the inner and outer surfaces of the fitting cylinder are held on the outer surface of the holding cylinder 4 and the peripheral wall 3. They are in close contact with the inner surface of the upper end.
[0011]
The elastic bar 16 is erected from the center of the bottom wall 12 so as to be close to the lower surface of the center of the top wall 2 of the cap body. The elastic bar may be suspended from the center of the top wall 2 toward the center of the bottom wall, and can be omitted. With the above configuration, the deep dish-shaped member 11 and the cap body upper portion above the member form an airtight first air chamber 17.
[0012]
FIG. 2 shows a state in which the cap is screwed and tightened to the outer surface of the mouth / neck portion 23 of the container body 22 into which the pouring stopper 21 is fitted. The spout 21 has a spout hole 25 at the center of the top wall 24, and a protrusion 27 is provided around the top periphery of the spout hole.
[0013]
In the illustrated example, the sheet 26 is attached to the upper surface of the ridge, and the outlet hole 25 is sealed with the sheet. When the container is distributed, the outlet hole is closed with the sheet, and the liquid is discharged by the consumer. However, the sheet is peeled off, and the pouring hole is closed by the bottom wall of the deep dish-like member.
[0014]
In the above state, the central portion of the bottom wall 12 of the deep dish-shaped member 11 is pressed against the upper surface of the ridge 27 and elastically deformed, whereby the inside of the first air chamber 17 is narrowed and the pressure is increased. The hole 25 is sealed. Also, the screw hole 25 is opened by screwing the cap, and the deep dish-like member 11 is elastically restored. When the cap is further tightened and lowered with respect to the mouth and neck portion 23, the elastic rod 16 is elastically bent with the upper end in contact with the central portion of the top wall 2 and is elastically restored when the cap is unscrewed. Helps elastic recovery of the bottom wall 12.
[0015]
FIG. 3 shows a second embodiment. In this embodiment, the cylinder 18 is erected from the central portion of the bottom wall 12 of the deep dish-shaped member, and the cylindrical piston 5 whose outer diameter is increased from the lower surface of the central portion of the top wall 2 of the cap body is suspended. The lower end of the cylindrical piston is slidably fitted to the upper inner surface of the cylinder 18, and the other structure is the same as in the first embodiment. In the case of the second embodiment, it is not always necessary to form the first air chamber 17 in an airtight manner between the deep dish-like member 11 and the upper part of the cap body. The cylinder 18 and the cylindrical piston 5 are not necessarily formed. An airtight second air chamber 19 is formed.
[0016]
4 shows a state in which the cap shown in FIG. 3 is screwed into a container body 22 with an extraction stopper 21 similar to that in FIG. 2, and FIG. 5 shows an outer surface of the container body neck without the extraction stopper. The state where it is screwed and tightened is shown.
[0017]
By tightening the cap, the bottom wall 12 bottom surface of the deep dish-shaped member is pressed against the upper surface of the pouring hole 25 of the pouring stopper 21 or the mouth portion 28 at the upper end of the mouth-and-neck portion 23 to seal them, and the deep dish-shaped member As the peripheral wall 13 is elastically deformed, the cylindrical piston 5 descends into the cylinder 18 to increase the pressure in the second air chamber 19. As shown in FIG. 4, when the outer diameter of the cylinder 18 is larger than the inner diameter of the outlet hole 25, only the second air chamber 19 is hermetically sealed, and the first air chamber 17 may not be hermetically sealed. Further, as shown in FIG. 5, when the inner diameter of the container body opening 28 is larger than the outer diameter of the cylinder, it is desirable to make the first air chamber 17 airtight.
[0018]
In the third embodiment shown in FIG. 6, the cap body 1 is formed by a peripheral wall 3 having an opening at the upper end surface and a top wall 2 having an outer peripheral portion fitted and fixed in the upper end portion of the peripheral wall. 11 shows an embodiment in which the outer periphery of the outward flange 14 is integrally connected to the upper inner surface of the peripheral wall 3.
[0019]
The top wall 2 has a short tube 6 suspended from the outer periphery thereof, and the short tube 7 is fitted into the upper end portion of the peripheral wall in an airtight or non-airtight state, and is provided on the outer surface of the lower end of the short tube. Is fitted on the inner surface of the upper end portion of the peripheral wall and fitted into the groove. Other structures are the same as those in the second embodiment.
[0020]
The cylinder 18 and the cylindrical piston 5 are opposite to the case shown in the figure, that is, the cylinder 18 is suspended from the top wall 2 of the cap body, and the cylindrical piston 5 is raised from the bottom wall of the deep dish member 11. It goes without saying.
[0021]
【The invention's effect】
The present invention has the above-described configuration, and the invention according to claim 1 is a cap body 1 that hangs down the peripheral wall 3 from the outer periphery of the top wall, and a container body mouth sealed that is fitted into the upper portion of the cap body. A cap is formed with the elastic basin-shaped member 11 having a bottom wall for use, and the elastic basin- shaped member 11 is fitted and fixed into the upper portion of the cap body 1 so that the central portion of the cap body top wall 2 and the elastic depth are fixed. The cylinder 18 protrudes from either one of the bottom wall central portion of the dish-shaped member and the cylindrical piston 5 protrudes from the other, so that the cylindrical piston tip in the cylinder tip is airtight and slidable. Since the airtight second air chamber 19 is formed by fitting them, the sealing performance of the cap can be improved as compared with the conventional packing.
[0022]
For the second aspect of the present invention, because provided to form a tight first air chamber 17 between the cap body upper inner and basin-like member, in addition to the second air chamber 19, the first air chamber 17 Therefore, the sealing performance of the cap can be further improved as compared with the case of claim 1.
[0023]
In the case of the invention described in claim 3, the elastic rod 16 prevents the elastic basin-like member 11 from being excessively squeezed by tightening the cap on the container neck and neck, and the durability of the elastic basin-like member Can be improved.
[0024]
In the case of the invention described in claim 4, since the fitting cylinder 15 rising from the outward flange of the deep dish-like member 11 is fitted between the holding cylinder 4 of the cap body and the inner surface of the upper part of the peripheral wall, the attachment is easy. Can be made.
[0025]
In the case of the invention according to claim 5, since the peripheral wall 3 of the cap body and the outward flange 14 of the deep dish member 11 are integrally connected, the deep dish member is accurately attached to the cap body. Is easy.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a cap of the present invention.
FIG. 2 is a longitudinal sectional view showing the cap fitted into the mouth and neck of the container body.
FIG. 3 is a longitudinal sectional view of a cap shown in different embodiments.
FIG. 4 is a longitudinal sectional view showing the cap fitted into the container body neck of the container.
FIG. 5 is a longitudinal cross-sectional view showing the cap shown in FIG. 3 fitted to different container body necks.
FIG. 6 is a longitudinal sectional view showing caps of different embodiments fitted to a container body neck.
[Explanation of symbols]
4 ... sandwiching cylinder 5 ... cylindrical piston
11 ... Deep dish 15 ... Mating cylinder
17 ... First air chamber 19 ... Second air chamber

Claims (5)

A cap body 1 that hangs down the peripheral wall 3 from the outer periphery of the top wall 2;
It was fixed into the upper part of the cap body, having a bottom wall 12 of the container body mouth or pouring hole for sealing, an elastic bowl-shaped member 11 Prefecture,
A cylindrical piston 5 having a cylinder 18 from one of the central part of the top wall 2 of the cap body and the central part of the bottom wall 12 of the deep plate-like member and a cylindrical piston 5 having a large outer diameter from the other end; The cylindrical piston tip is airtightly and slidably fitted into the cylinder tip so as to project, and the cylinder and the cylindrical piston form an airtight second air chamber 19. A cap for fitting the container body. The container body fitting cap according to claim 1, wherein an airtight first air chamber ( 17) is formed in the upper part of the cap body and the deep dish member ( 11 ) . The elastic rod 16 is erected from either one of the center of the top wall 2 of the cap main body and the center of the bottom wall 11 of the deep dish-like member with the tip close to the center of the bottom wall 12 or the center of the top wall 2. The container body fitting cap according to claim 1, wherein the container body fitting cap is provided. The holding cylinder 4 is suspended from the lower surface of the outer peripheral portion of the top wall 2 of the cap body, and the fitting cylinder 15 is erected from the outward flange 14 attached to the upper end of the peripheral wall 13 of the deep dish member. 4. The container body fitting cap according to claim 1, wherein the fitting cylinder 15 is fitted and fixed in the gap between the container body and the fitting body. The cap body 1 is formed by a peripheral wall 3 having an upper end opening and a top wall 2 in which the outer peripheral portion is fitted and fixed in the upper end portion of the peripheral wall, and the deep dish member 11 is connected to the upper end of the peripheral wall 13 of the member. 5. The container body fitting cap according to claim 1, wherein the outer periphery of the outward flange 14 provided is integrally connected to the upper inner surface of the peripheral wall 3 of the cap body.

Images