JPS5925331Y2 - Liquid containers such as thermos flasks - Google Patents

Description

[Detailed description of the invention] This invention consists of screwing a stopper into a lid made by assembling an annular lid member to a lower mouth member, and opening and closing the liquid outlet by the vertical movement of a core valve attached to the stopper. It relates to a liquid container such as a thermos flask configured to do so.

In this type of liquid container, when the core valve is set to the open state and the container body is tilted to pour out the liquid, the liquid is poured out through the pouring field of the inner container → liquid outlet → liquid pouring path. A portion of the liquid in the liquid outlet may leak to the outside through the gap between the lid and the stopper.

This phenomenon is called "crying during injection" in the industry, but the first priority of this invention is to prevent this "crying during injection".
The purpose of

The lid portion of the container body is constructed by assembling an annular lid member to the side peripheral wall of the lower mouth member, and is formed in a hollow state in order to save material and reduce weight. It is also necessary to prevent liquid from entering through the gap between the joining surfaces of the lid and the lower mouth member.

A second object of the present invention is to ensure the sealing performance between the annular lid portion and the side peripheral wall of the lower mouth member.

Furthermore, a third object is to achieve the first and second objects with one packing and to simplify the structure.

The present invention will be explained in detail below based on embodiments shown in the drawings.

The embodiment of the present invention shown in FIG. 2 relates to a thermos flask, in which a lid part 2 and a lower mouth part 3 are disposed at the upper end of a container body 1, and a gap between the lid part 2 and the lower mouth part 3 is provided. A liquid injection passage 4 is formed in the.

Inside the outer case 5 of the container body 1, an inner container 6 made of a vacuum double bottle is disposed.

A lower opening member 10 is attached to the upper opening of the exterior case 5, and an annular lid member 2a is fixed to the upper part of the lower opening member 10.

The lower opening member 10 is provided with an open lower portion communicating with the inner container 6 at the center thereof, and a front portion 8 that projects forward (to the left in the figure) at the front end.

This front portion 8 is covered by a flap 44a that can be opened and closed.

Further, an annular wall 2b having a space therein into which the stopper 12 can be inserted is formed on the inner periphery of the annular lid member 2a.

The opening peripheral portion 3a of the lower mouth member 10 is flat, but a side peripheral wall 2d that stands up is provided along the outer edge of the peripheral portion 3a (excluding the front portion).

On the upper end 2e of this side peripheral wall 2d is the annular lid member 2a.
is installed.

Further, a female thread 24 for screwing the stopper 12 is formed on the inner surface of the side peripheral wall 2d.

In the present invention, the range referred to as the lid portion 2 includes not only the annular lid member 2a but also the side peripheral wall 2d of the lower mouth member 10.

On the other hand, the area referred to as the lower opening portion 3 is limited to the opening peripheral portion 3a of the lower opening member 10.

The plug body 12 has a guide cylinder part 16 for guiding the crown button 15 in the center of the upper cap part 14 thereof.

Further, below the cap portion 14 is a stepped cylindrical portion 17 with a bottom.
are assembled by force fitting.

This bottomed cylindrical portion 17 has a large diameter portion 19 at its upper portion and a small diameter portion 20 at its lower portion, and is configured such that a stepped portion 21 between the two comes into contact with a seal packing 22 described later when the screwing of the plug body 12 is completed. ing.

A male thread 13 is formed on the outer periphery of the small diameter portion 20 to be screwed into the female thread 24.

A crown-shaped button 15 is disposed within the guide cylinder portion 16 of the plug body 12, and an actuation cylinder 36 to which a valve body 31 is attached is disposed within the crown-shaped button 15 via a valve rod 37 extending downward.

The operating cylinder 36 is urged upward by a spring 38.

In addition, a valve body position holding mechanism 39 formed between the guide cylinder portion 16, the crown button 15, and the actuating cylinder 36 causes the actuating cylinder 36 and the valve body 3 to move in response to the pressing operation of the crown button 15.
1 is sequentially and alternately stopped at an open position (upper stop position) or a closed position (lower stop position - FIG. 2), and this state is maintained.

The valve stem 37 passes through a hole 41 provided at the center of the bottom wall 40 of the bottomed cylindrical portion 17 .

In order to ensure the sealing performance of this hole 41, an annular packing 56 is fitted onto the valve stem 37.

The valve body 31 has protruded into the lower opening lower part, and the upper flange part 43 is above the lower part between the lower mouth parts,
It is formed with a larger diameter than this.

An annular packing 32 is attached to the lower surface of the flange 43 of the valve body 31 for sealing between the lower opening portion and the valve body 31.

The crown button] 5, the operating cylinder 36, the valve stem 37, and the valve body 31 constitute one example of the core valve 50 according to the present invention.

The vertical movement of the core valve 50 is transmitted to the flap 44a via the interlocking mechanism 55, and when the core valve 50 is in the open position, the flap 44a is configured to open dynamically.

An annular seal packing 22 is sandwiched between the coupling surfaces 48 and 49 of the annular lid member 2a and the side peripheral wall 2d of the lower mouth member 10, and a seal is formed when the screwing of the plug body 12 by the female and male threads 24° 13 is completed. The inner circumferential protrusion 51 of the gasket 22 is brought into contact with the lower surface of the stepped portion 51 of the stopper 12 in a crimped manner.

A convex portion 52 is formed on the upper surface of the outer peripheral base of the seal packing 22, and this is fitted into a recess 53 formed in the coupling surface 48 of the annular lid member 2a, and the annular lid member 2a and the lower mouth member 10 and the side peripheral wall 2d are force-fitted together at the retaining portions 54 of both.

When installing the seal gasket 22, the convex portion 52 of the seal gasket 22 is pushed into the recess 53 of the opposing surface 48 to temporarily fix the seal gasket 22, and then the annular lid member 2a is attached to the side peripheral wall 2d of the lower opening member 10. By forcibly fitting the outer peripheral base of the seal packing 22, both 2a, 2
It should be sandwiched between d.

Further, a convex portion is formed on the lower surface of the outer periphery of the seal packing 22,
This may be configured to fit into a recess formed in the facing surface 49 of the side peripheral wall 2d.

In FIG. 2, 45 is a handle, and 46 is a gasket that seals the contact portion between the lower mouth portion 3 and the inner container 6.

As exemplified in the above-mentioned embodiment, the present invention is realized by screwing the stopper 12 onto the cover 2 which is formed by attaching the annular cover member 2a to the lower mouth member 10, and by vertically moving the core valve 50 attached to the stopper 12. In a liquid container such as a thermos flask configured to open and close the liquid outlet (in the above embodiment, the inner container 6→lower opening lower→liquid injection passage 4→spout 9), when the closure is fully screwed, the closure 12 The seal packing 22 for sealing between the annular lid member 2a and the lower opening member 10 is sandwiched between the annular lid member 2a and the lower opening member 10. It can be configured as follows.

For example, as shown in FIG. 3, the inner peripheral protrusion 51 of the seal packing 22 is shaped like an annular tongue pointing upward, so that the abutment position of the plug 12 against the seal packing 22 when screwing is completed is in the vertical direction. Even if there is variation in the temperature, the variation can be absorbed by the flexure of the inner circumferential protrusion 51, so that the sealing can be performed properly at all times.

It is also possible to apply the configurations shown in FIGS. 2 and 3 to the reference example shown in FIG.

In the reference example shown in FIG. 1, a lid part 2 and a lower mouth part 3 are arranged at the upper end of a container body 1, and a frame external liquid path 4 is formed between the lid part 2 and the lower mouth part 3. There is.

Inside the outer case 5, which is the main component of the container body 1, is arranged an inner container 6 made of a vacuum double bottle.

A lower opening member 10 is attached to the upper opening of the exterior case 5, and an annular lid member 2a is fixed to the upper part of the lower opening member 10.

The lower opening member 10 is provided with an open lower portion communicating with the inner container 6 at the center thereof, and a front portion 8 that projects forward (to the left in the figure) at the front end.

At the front end of the annular lid member 2a, a beak cover part 11 is provided which covers the front part 8 and forms a spout 9 of the external liquid channel 4 between the front part 8 and the front part 8.

Further, an annular wall 2b having a space inside into which the stopper 12 can be inserted is formed in the center of the annular lid member 2a.
The lower end of b is bent inward to form a seating portion 2C.

The opening peripheral portion 3a of the lower opening member 1o is flat, but a side peripheral wall 2d that stands up is provided along the outer edge of the peripheral portion 3a (excluding the front portion).

On the upper end 2e of this side peripheral wall 2d is the annular lid member 2a.
is attached, and the outer case 5 is attached to the outer peripheral end of the upper end portion 2e.

Further, a female thread 13 for screwing the stopper 12 is formed on the inner surface of the side peripheral wall 2d.

In the above description, the range referred to as the lid portion 2 includes not only the annular lid member 2a but also the side peripheral wall 2d of the lower mouth member 10.

On the other hand, the area referred to as the lower opening portion 3 is limited to the opening peripheral portion 3a of the lower opening member 10.

The plug body 12 has a cylindrical guide tube 16 formed in the center of an upper cap portion 14 for guiding a crown button 15, which will be described later.

Further, a bottomed cylindrical portion 17 is provided below the cap portion 14, and a liquid path forming cylinder 18 is further provided below this bottomed cylindrical portion 17.

The bottomed cylindrical portion 17 has a large diameter portion 19 at the top and a small diameter portion 20 at the bottom, and an annular seal packing 22 that contacts the lower surface of the stepped portion 21 between the two is wrapped around the outer periphery of the small diameter portion 20. are doing.

Although the seal packing 22 has a circular cross-sectional shape in the illustrated example, it can have any cross-sectional shape such as an enclosing rectangular shape.

Reference numeral 23 denotes a small annular projection provided on the small diameter portion 20 for fitting the seal packing 22 between it and the stepped portion 21.

Below the seal packing 22, a male screw 24 is formed on the outer periphery of the small diameter portion 20 to be screwed into the female screw 13.

The liquid passage forming cylinder 18 has a lower end opening 25 communicating with the inner container 6, and has a spout 27 on a side circumferential wall 26 thereof communicating with the liquid passage 4 outside the frame.

This spout 27 is provided with a rectifying rib 28 to regulate the flow of liquid during injection.

Further, a flange 29 having a larger diameter than the opening lower part of the lower mouth portion 3 is provided below the spout 27 of the side peripheral wall 26.
A small annular protrusion 30 is provided at the lower end.

Between the flange 29 and the small protrusion 30, there is a gasket 32 at its base 33, which seals between the plug body 12 and the lower part of the lower opening, and also seals between the lower end opening 25 and the valve body 31, which will be described later. It is fitted in.

The lower seal part 34 of this packing 32 is bent into a cross-sectional shape and is adhered to the lower end surface of the side peripheral wall 26, while the upper seal part 35 opens upward in a trumpet shape and its tip ends at the flange 29. It is configured to be in contact with the bottom surface of.

A crown button 15 is disposed within the guide tube 16 of the stopper 12 so as to be movable up and down but not rotatable, and an actuating tube 36 is disposed within the button 15 so as to be movable up and down and rotatable.

Further, the valve body 3 is connected to the operating cylinder 36 via a valve rod 37 extending downward.
1 is installed.

The operating barrel 36 is urged upward by a biasing spring 38, and a valve body position holding mechanism 39 is provided at the lower inner surface of the guide barrel 16, the lower end of the crown button 15, and the lower outer surface of the operating barrel 36. In response to the pressing operation of the crown button 15, the actuating cylinder 3
6. In addition, the valve body 31 is configured to sequentially and alternately stop at the closed position (upper stop position) or the open position (lower stop position) and maintain this state.

The valve rod 37 passes through a hole 41 provided at the center of a partition wall 40 formed at the bottom of the bottomed cylindrical portion 17 .

A telescopic bellows-like packing 42 whose lower end is fixed to the valve stem 37 is disposed below the hole 41, and the upper end of the bellows-like packing 42 surrounds the hole 41 to form the partition wall 40. It is attached to the bottom surface.

Thus, the bellows-shaped packing 42 can reliably prevent the liquid in the internal liquid path 43 of the stopper in the liquid path forming cylinder 18 from leaking into the internal space above the stopper 12 through the hole 41.

Incidentally, the crown button 15, the operating cylinder 36, the valve stem 37, and the valve body 31 constitute an example of the core valve 5°.

The liquid outlet path is constituted by a liquid path 43 inside the stopper and a liquid path 4 outside the frame.

In FIG. 1, 44 is a flap, 45 is a handle, 46 is a gasket that seals the contact area between the lower mouth portion 3 and the inner container 6;
47 is a tightening ring.

Since the present invention has the above-mentioned configuration, it is possible to ensure a seal between the stopper and the lid when the screwing of the stopper to the lid is completed.
This has the effect that it is possible to prevent "crying during liquid injection," and at the same time, it is also possible to ensure a seal between the annular lid member and the lower mouth member using the seal gasket used to ensure this seal. be able to.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view of a reference example, FIG. 2 is a vertical side view of a main part of an embodiment of the present invention, and FIG. 3 is an enlarged vertical side view of a main part of another embodiment of the present invention. 1... Container body, 2... Lid, 2a.
...Annular lid member, 10...Lower mouth member, 1
2... Plug body, 22... Seal packing, 50... Core valve.

Claims (1)

[Scope of utility model registration request] In a liquid container such as a thermos flask, in which a stopper is screwed onto a lid formed by assembling an annular lid member to a lower mouth member, and a liquid outlet is opened and closed by vertical movement of a core valve attached to the stopper. A liquid container such as a thermos flask, characterized in that a sealing gasket for sealing between the stopper and the lid when the screwing of the stopper is completed is sandwiched between the annular lid member and the lower mouth member.