JPH0199978A - Hermetic sealed container - Google Patents

Abstract

PURPOSE:To exhibit hermetic function surely over a long period, by sealing the container body and the cap member through welding the weld rib of the cap member on the top of the container body flange, and by bending the cap member concentrically centering on its center to make the cross section undulated. CONSTITUTION:The container body 4 and a cap member 5 are welded by ultrasonic waves with liquid stored in the body 4. The top of the member 5 is provided with the contact surface 12 of an ultrasonic horn 1; ultrasonic oscillation is transmitted to the member 5 via the surface 12 and to the horizontal part 6 of the body 4 via projections 11a, 11b that are weld ribs. The inner rib 11a prevents the liquid of the container body 4 from splashing upon ultrasonic oscillation and blocking welding, while the outer projection 11b is melted and welded to the body 4. Since the cap member 5 is undulated by concentric bending centering on its center, it can move to the container body 4 with the center moving maximumly and absorbs the variation of inner pressure. Even when inner measure varies with changes in temperature, the damage of a weld can surely be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hermetically sealed container, and more particularly to a hermetically sealed container that is welded and sealed using ultrasonic waves or the like.

[Prior art and its problems]

In general, hermetic seal containers that utilize thermal welding techniques such as ultrasonic welding and spin welding for the purpose of sealing liquid inside have the following problems.

- The internal pressure increases during welding, so the strength of the welded part is not sufficient.The internal pressure increases and gas tries to escape from the welded part, resulting in poor welding or pinholes.

■After welding, internal pressure increases due to changes in surrounding temperature, which may damage the welded part.

Therefore, there is a problem in that there are no containers for storing liquid inside and sealing this liquid that have sufficient durability against temperature changes after welding. .

This invention solves the problems of the conventional methods as described above, and even if there is a change in ambient temperature during and after sealing the liquid, there is a risk of damage to the welded part. To provide a hermetically sealed container that can reliably exhibit a sealing function over a long period of time without any problems.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has an opening at the top and a horizontal flange at the edge of the opening.
A container body capable of storing a liquid therein, and a lid member having a disc shape that closes an upper opening of the container body and having a horizontal portion on the periphery with a welding rib provided on the lower surface, A hermetically sealed container in which the welding rib of the lid member is welded to the upper surface of the flange of the container body to seal the container body and the lid member, wherein the lid member is arranged in concentric circles around the center of the lid part. This method employs a method of curving the cross section into a wave-like shape.

[Effect]

By adopting the above-mentioned means, the present invention is able to prevent temperature change inside or outside when the lid member is placed on the upper part of the container body and the peripheral edges of both are welded to seal the inside. Even if the internal pressure changes, since the lid member itself is movable in the vertical direction, the internal volume can be changed to absorb the internal pressure change.

〔Example〕

Embodiments of the invention shown in the drawings will be described below.

The drawings show a hermetically sealed container according to the present invention; FIG. 1 is a diagram showing the relationship with an ultrasonic welding device during hermetically sealing, FIG. 2 is an enlarged view of the main parts of the hermetically sealed container, and FIG. The figure is a schematic diagram of a hermetically sealed container according to the present invention, and this hermetically sealed container first includes an ultrasonic horn 1 that forms a part of an ultrasonic welding device and emits ultrasonic waves, and an ultrasonic welding device that emits ultrasonic waves. A hermetically sealed container 3 according to the present invention is disposed between the receiver and the jig 2, which constitute a part of the receiver.

The airtight seal container 3 located between the ultrasonic horn 1 and the receiver jig 2 includes a container body 4 and a lid for closing the upper end of the container body 4, as shown in FIG. It is composed of a member 5, and at the upper end of the container body 4,
The lid member 5 is welded to the container body 4 by melting a portion of the lid member 5 due to heat generated by vibrations of ultrasonic waves generated by the ultrasonic horn 1.

In this case, the container main body 4, which is one of the hermetic seal containers 3, has a cylindrical shape with a closed lower end, can store liquid therein, and is provided with a brim-like horizontal portion 6 at the upper edge.

Moreover, the lid member 5, which is the other side of the hermetically sealed container 3, is
A cylindrical air pocket 7a projecting upward is provided in the center, and the outer peripheral edge of the main body 7, which has a concentric wave shape centered on the cylindrical air pocket 7a, rises upward. A horizontal section 8 is formed, and a horizontal section 9 is provided at the upper end thereof, and the tip of this horizontal section 9 hangs downward to form a hanging section IO, which is placed at a predetermined interval on the lower surface of the horizontal section 9. and an annular projection 11 which is a welding rib.
Two a and llb are provided, and an abutment surface 12 is provided on the upper surface of the horizontal portion 9 and rises upward with a predetermined width.

On the other hand, as shown in FIGS. 1 and 2, the ultrasonic horn 1 of the ultrasonic welding apparatus has a hollow portion 1a that opens at the lower end surface.
The upper surface of the lid member 5 is pressed by the peripheral edge facing the opening of the cavity 1a. It comes into contact only with the contact surface 12 provided on the upper surface of.

Further, the receiving jig 2 of the ultrasonic device has a cavity 2a into which a container body 4, which is one side of the hermetically sealed container 3, is received, and a flange-shaped horizontal portion 6 at the upper end of the container body 4 is inserted into the container body 4. Since it has a larger diameter than the space 2a, the receiver is held suspended by the jig 2, and an annular recess 2b is provided on the upper surface facing the space 2a.

When the lid member 5 is ultrasonically welded to the upper end of the container body 4 configured as described above, first, as described above, the receiver is attached to the container body 4 inside the cavity 2a of the jig 2. is placed and suspended, the lid member 5 is placed on the upper end of the container body 4, and then the ultrasonic horn 1 is placed on the upper part of the lid member 5,
Preparation is now complete.

By oscillating ultrasonic waves after doing the above, it is possible to ultrasonically weld the container body 4 and the lid member 5 while the liquid remains stored inside the container body 4.

That is, during this welding, a contact surface 12 of an ultrasonic horn is provided on the upper surface of the lid member 5, and ultrasonic vibrations are transmitted to the lid member 5 via this contact surface 12.
The container body 4 is attached via the protrusions 11a and llb, which are welding ribs.
At this time, the lower ends of the protrusions 11a and llb, which are welding ribs, provided on the inner circumferential side and protrusions 11b provided on the outer circumferential side, respectively, are transmitted to the horizontal part 6 of the container body 4. Due to the contact with the upper surface of the horizontal portion 6, the liquid stored inside the container body 4 is first scattered in the form of mist by ultrasonic vibration, but the presence of the protrusion 11a on the inner peripheral side As a result, there is no risk of the liquid scattering outside of the projection 11a, thereby reliably eliminating the possibility that the liquid will affect the parts outside of the projection 11a. teeth,
Dissolved by ultrasonic vibration by the ultrasonic horn 1,
It is welded to the upper surface of the horizontal portion 6 of the container body 4.

Furthermore, during this welding, since the tip of the horizontal part 6 of the lid member 5 forms a drooping part 10, the protrusion 11b on the outer circumferential side melts and the protruding part of the drooping part 10 flows out. In addition to increasing welding strength by preventing this, it also serves as a cover to prevent it from being seen from the outside.

Therefore, by using the two protrusions 11a and llb as described above, the protrusion 11a on the inner circumferential side can cause the container body to bulge during ultrasonic vibration.
This prevents the liquid stored inside the container from becoming atomized and scattering and inhibiting welding, and the projections 11b on the outer circumferential side melt and weld to the container body 4, thereby causing the welded object 3 to melt.
The container body 4 and the lid member 5 are reliably welded together.

Note that the ultrasonic frequency during welding is preferably 14 to 16 KH2, and the ultrasonic oscillation width is preferably 20 to 60 μm.

The hermetically sealed container welded by the above process has a concentrically curved wave shape centered on the center of the lid member 5, so that the center can be moved by the maximum amount. is movable relative to the container body 4 as
The lid member 5 itself moves up and down in response to changes in internal pressure, thereby absorbing the changes in internal pressure. Therefore, the container body and the lid member are welded and sealed by ultrasonic welding, spin welding, etc. Even if internal and external temperature changes occur and the internal pressure changes, the risk of damage to the welded portion can be reliably prevented.

Furthermore, in the case where the air reservoir 7a is provided in the center of the lid member 5, the air inside the air reservoir 7a contracts and can absorb pressure fluctuations inside the container. Furthermore, it has the effect of being able to be absorbed reliably.

In addition, although the case where welding is performed using ultrasonic waves has been described in the above embodiment, the lid member is not limited to this, and even if other welding means are employed, the lid member moves in accordance with changes in internal pressure and changes the internal volume. Since this prevents the pressure from increasing, damage to the welded portion can be reliably prevented.

〔Effect of the invention〕

With the above configuration, the present invention can weld the container body and the lid member located at the upper part of the container body while the liquid remains stored inside the container body. The interior can be sealed, and even if the internal pressure changes due to temperature changes inside and outside after sealing, the corrugated lid member itself can absorb the internal pressure change. This has excellent effects such as being able to reliably prevent the risk of damage to the welded portion.

[Brief explanation of the drawing]

Fig. 1 is a schematic view showing the airtight seal container according to the present invention attached to an ultrasonic welding device, Fig. 2 is an enlarged view of the main parts of the airtight seal container, and Fig. 3 is a configuration of the airtight seal container according to the invention. FIG. 2 is a schematic diagram showing a container body and a lid member. 1... Ultrasonic horn 1a... Cavity part 2... The receiver is jig 2a... Hollow space 2b... Recessed part 3. ...Hermetically sealed container 4...Container body 5...Lid member 6.9...Horizontal portion 7...Body 7a... ... Air pocket 8 ... Rising part 10 ... Drooping part 11a, llb ... Welding rib (protrusion) 12 ...
... Contact surface patent applicant: Esthe Chemical Co., Ltd.

Claims (2)

[Claims] (1) A container body with an open top surface and a horizontal flange provided at the edge of the opening and capable of storing liquid inside, and a disk-shaped container body that closes the top opening of the container body; A lid member having a horizontal part provided on the periphery with a welding rib provided on the lower surface, the welding rib of the lid member being welded to the upper surface of the flange of the container body to seal the container body and the lid member. 1. A hermetically sealed container, wherein the lid member is curved concentrically around the center of the lid and has a wave-shaped cross section. (2) The hermetically sealed container according to claim 1, wherein the member has an air pocket whose central portion projects upward and opens at the bottom surface.