JPH09215610A - Plug body of liquid vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the necessary number of packing in a plug body disposed in an inner tube part with a valve body for opening and closing a liquid flow path by fitting circumferentially an annular sealing member having a cavity opened to the inside surface in a position contacting the upper surface of the valve body from the lower surface of a flange formed on the outer surface in the lower end of the plug body. SOLUTION: A plug body 13 for sealing up a liquid vessel such as a vacuum bottle is composed almost of a plug body 19, valve body mechanical part A and upper lid member unit B to provide a space in the plug body as a liquid flow path 4. The plug body 19 has an outer tube part 21 and inner tube part 22 having respectively opening parts composed integrally. A plug packing 27 is fitted circumferentially on the edge member 52 of the inner tube part 22. Then, the plug packing 27 is mounted to the edge member 52 such that a cavity part surrounded by the outer wall of the edge member 52, the lower surface of a flange 54, the upper surface of a flange 55 and the inner surface of the plug packing 57 is formed. The plug body 57, when attached to the vessel, is pressed through the cavity part against the neck part of the inner wall of the vessel with a sealing-up part 59 being deformed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper for tightly sealing a liquid container such as a thermos bottle. In particular, the stopper can be positioned in the pouring direction with respect to the liquid container, and the packing does not easily come off, and a required number of packings are required. Concerning plugs with few

[0002]

2. Description of the Related Art In recent years, what is called a one-touch stopper has been widely used as a stopper provided in a liquid container such as a thermos bottle. For example, in Japanese Patent Application No. 6-213069,
As shown in FIG. 8, the plug main body 19 including the inner tubular portion 22 and the outer tubular portion 21 and having the liquid passage 4 formed between the inner tubular portion 22 and the outer tubular portion 21, and the inner tubular portion 22. A push button 2 slidably provided inside and arranged on the upper surface of the plug body 19.
8 and a valve body 6 that opens and closes the lower end of the liquid passage 4 in conjunction with the push of the push button 28, and a part of the valve body 6 can swing to open and close the upper end of the liquid passage 4. It has a flap 29 pivotally supported on the push button 28,
When the push button 28 is pressed, the valve body 6 moves downward to release the blockage of the liquid passage 4, and at the same time, the tip of the flap 29 moves to the open position above the closed position to open the liquid passage 4. Moreover, by pushing down the tip of the flap 29 in the state where the fluid passage 4 is opened, the tip of the flap 29 closes the fluid passage 4 and moves the valve body 6 upward to move the fluid passage. A plug 1 configured to close 4 is described. The plug 1 is attached to a container body 12 having a vacuum heat insulation double structure, which is composed of an inner container 15 and an outer container 16 made of a stainless steel plate.

In this conventional plug body 1, as a packing for stopping the water content of the container, a plug packing 23 is provided in close contact with the peripheral portion of the bottom surface of the plug body, and outside the plug body. An O-ring 24 is provided above the peripheral surface. When this plug is attached to the container body as shown in FIG. 8, the plug packing 23 and the inner wall surface of the neck portion 15a formed on the container inner cylinder are in close contact with each other, so that the outer peripheral surface of the plug 1 and the inner surface of the container are Water is stopped between the two, and when the liquid passage 4 is closed, the plug packing 23
The close contact between the upper surface of the valve body 6 and the upper surface of the valve body 6 stops the water flow in the lower liquid passage port. However, in the conventional plug 1,
The conventional plug packing 23 alone is not sufficient to ensure the waterproofing of the outer peripheral surface of the stopper 1 and the inner surface of the container 12 and the prevention of liquid leakage to the outside. Therefore, in addition to the conventional plug packing 23, it is necessary to provide the O-ring 24, and when the O-ring is mounted on the container 12, the O-ring is pressed against the opening of the container to stop water. It was

[0004]

However, such a structure is
Since two kinds of packings are required, the assembly is complicated and the number of steps is large, which causes a problem that the cost is increased. Further, the plug packing 23 can be attached to the container body only in an arbitrary direction, the elasticity of the packing in the vertical direction is small, and the screwing range to the container body is narrow, so that the pouring direction of the inner plug cannot be positioned. was there. The present invention has been made in view of the above circumstances, and provides a stopper that is easy to assemble, is low in cost, and can be positioned in the pouring direction with respect to the container body by reducing the number of packings. With the goal.

[0005]

A stopper of a liquid container according to the present invention is attachable to and detachable from a liquid container main body and is composed of an inner cylinder portion and an outer cylinder portion, and is inserted between the inner cylinder portion and the outer cylinder portion. A stopper main body having a liquid passage formed therein is slidably provided inside the inner tubular portion, and a lower end portion of the liquid passage is opened and closed in association with pressing of a push button arranged on an upper surface of the stopper main body. A valve body that is formed with a flange outwardly in a radial direction on the outer surface of the lower end portion of the plug body, the position contacting the closed upper surface of the valve body from the lower surface of the flange. Consists of an elastic body,
It is characterized in that an annular sealing member having a cavity opened on the inner side surface is provided around. At least one stage of flange may be formed between the lower surface of the flange and the lower end of the plug body, and the sealing member may be locked by the flange. A convex portion is provided in the vicinity of the peripheral portion of the lower surface of the plug body, and a concave portion is provided at a position facing the convex portion of the sealing member, and the convex portion of the plug body and the concave portion of the sealing member are engaged with each other. It may be configured as follows.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
1 to 7 show an embodiment of the plug body of the present invention. The basic structure of this stopper is the same as the structure described in the conventional example of FIG. 8, and the common parts are given the same reference numerals to simplify the description.

The plug body 13 is roughly composed of a plug body 19, a valve body mechanism portion A, and an upper lid member unit B. The space inside the stopper body formed between the stopper body 19 and the upper lid member unit B serves as the liquid passage 4. The liquid passage 4 extends from a liquid passage port 5 formed in the bottom of the stopper body 19 to a discharge port 20 formed in a stopper lid member (described later) of the upper lid member unit B to communicate the inside and outside of the stopper body 13. ing.

The plug body 19 is made of resin and has an outer cylinder portion 21 and an inner cylinder portion 22 each having an opening at the top, which are integrated. On the outer peripheral surface of the outer cylinder portion 21, a screw portion 21a that is screwed into the neck portion of the inner cylinder 15 of the container body is formed so that it can be detachably attached to the container body 12. On the inner peripheral surface of the inner cylindrical portion 22, a screw portion 22a that is screwed with a plug inner member (described later) of the upper lid member unit B is formed. A screw portion 21b is also formed near the inner edge of the opening of the outer tubular portion 21 so that the screw portion 21b can be screwed into the upper lid member unit B. In addition, the stopper body 19 and the upper lid member unit B
Since the joining of and can be achieved by screwing either one of the screw portion 21b and the screw portion 22a, either one of the screw portion 21b and the screw portion 22a can be omitted.
At the lower end of the upper lid unit B, a packing 71 for preventing liquid from entering between the upper lid unit B and the plug body 19.
Are installed around.

The inner cylinder portion 22 is composed of a valve rod sliding portion 51, an edge member 52, and a rib portion (not shown) that connects them. The rib portion has a cross shape in a plan view, and the gap serves as the liquid passage port 5. A step portion 52a is formed on the inner surface of the edge member 52, and the lower end portion of the outer tubular portion 21 is welded thereto, so that the outer tubular portion 21 and the inner tubular portion 22 are integrated.
Alternatively, the inner cylinder portion 22 and the outer cylinder portion 21 may be integrally molded. The edge member 52 has a substantially L-shaped cross section, and a flange (first flange) extending radially outward from the upper end thereof.
53 is formed, and further below the first flange 53, a second flange 54 and a third flange 55 that extend radially outward are provided, and an annular shape is provided near the peripheral portion of the lower surface thereof. The convex portion 56 is provided.

An annular plug packing (sealing member) 57 made of an elastic body made of rubber such as silicone or elastomer is provided around the edge member 52. Plug packing 57
Is a side mounting portion 58, a sealing portion 59, and a bottom mounting portion 6
0, and has a cavity 62 that is open to the inner surface.
The bottom surface mounting portion 60 projects downward while forming a recess 60a on the top surface thereof, and a tongue piece 61 is formed on the bottom surface of the bottom surface mounting portion 60. Then, the side surface mounting portion 58 of the plug packing 57 is press-fitted between the first flange 53 and the second flange 54, the convex portion 56 is press-fitted into the concave portion 60a of the bottom surface mounting portion 60, and the edge member 52 is also included. The plug packing 57 is attached to the edge member 52 so that a cavity surrounded by the outer wall, the lower surface of the second flange 54, the upper surface of the third flange 55, and the inner surface of the plug packing 57 is formed.

Plug packing 5 mounted as described above
When the plug body 13 is attached to the container body 12, the contact between the plug packing 57 and the inner wall surface of the neck formed on the container in the container prevents the water between the outer peripheral surface of the plug body 13 and the inner surface of the container. In addition, when the liquid passage 4 is closed, the tongue piece 61 of the plug packing 57 and the upper surface of the valve body 6 are brought into close contact with each other, so that the lower liquid passage port 5 can be stopped. Here, due to the existence of the cavity between the edge member 52 and the plug packing 57, the plug packing 57 is
Is pressed against the neck of the inner wall of the container with the sealing portion 59 deformed when mounted on the container. Therefore, if the crushing margin of the plug packing 57 is set so that the plug packing 57 is deformed when the screwing for mounting on the container is started, that is, the length in the pressing direction that is deformed at the time of mounting is set, this state is set. It is possible to position a particular spout direction with respect to the container, since sufficient water-stopping will be achieved at.
Further, the sealing performance of the plug packing 57 is high, and the plug packing 5
Since the outer peripheral surface of the stopper body and the inner surface of the container are surely stopped by 7, it is possible to omit the O ring for stopping the water between the stopper body 13 and the inner container of the container, which has been essential in the past. Therefore, the number of steps can be reduced.

A side mounting portion 58 of the plug packing 57 is also provided.
The width in the up-and-down direction of is set to be slightly wider than the distance between the first flange 53 and the second flange 54, and
Since the width of the groove of the concave portion of 0 is set to be slightly narrower than the width of the convex portion 56, the plug packing 57 mounted as described above.
Is strongly gripped in the axial direction and the radial direction by the edge member. Therefore, there is no concern that the plug packing 57 will come off during cleaning. Further, in the conventional packing having the shape shown in FIGS. 2 (a) and 2 (b), the packing may be installed upside down at the time of mounting, which may cause liquid leakage. As shown in FIG. 3, the plug packing 57 is provided with the bottom surface mounting portion 60 extending downward, so that a mounting error does not occur.

On the other hand, the valve body mechanism portion A is inserted and attached from the bottom inside the plug body 19. The valve body mechanism section A is roughly configured by a valve body 6, a coil spring 11, and a valve rod cover 25. The valve body 6 is made of resin and includes a valve plate portion 26 that opens and closes the inlet of the liquid passage, and a valve rod portion 10 that slides inside the inner cylinder portion 22 of the plug body 19.

The valve rod cover 25 is made of resin and has a substantially crown shape having an opening at the bottom, and is covered by force fitting so as to cover the valve rod portion 10 of the valve body. A metal coil spring 11 is mounted around the valve rod portion 10. The coil spring 11 includes a valve rod cover top surface 25a and an inner cylinder inner bottom surface 22.
It is sandwiched between b and b. Also, the valve stem 10
A valve rod packing 27 that prevents liquid from entering the inside of the stopper body 19 is attached to the lower portion. With the above configuration, the valve body 6 is constantly urged upward by the extension force of the coil spring 11, the valve plate portion 26 abuts the tongue piece 61 of the plug packing 57, and the liquid content can be stopped. ing.

The upper lid member unit B includes a push button 28 for opening the liquid passage opening, a flap 29 for opening / closing the discharge opening 20 and closing the liquid passage opening, a push button 28 and a valve element. The inner member 31 to be slid and the cap lid member 30 that accommodates these members and constitutes the upper surface of the plug body are configured as main components. The operation mechanism of the upper lid member unit B will be described with reference to FIG. 7 not shown in FIG.

In the state shown in FIGS. 4 and 5, the flap 29 closes the discharge port 20, the push button 28 is also located at the top dead center, and the flap 29 and the push button 28 are substantially flush with each other. is there.

When the push button 28 is pressed downward from the state shown in FIG. 4 and FIG. 5, the flap 2 moves as the push button support 33 moves down inside the plug inner member.
The 9 proximal end side (shaft connecting portion side) also moves downward, but the flap 29 hits the inner plug member 31 and the tip end side (discharging port side) of the flap 29 moves up across the inner plug member 31 by the principle of leverage. . At the same time, the push-button support 33 that has moved downward pushes the valve body 6 through the valve rod cover 25 that is in contact with the push-button support body 33, and the locking portion provided on the flap 29 moves downward and rotates to cause the stopper. It engages with a locking surface provided on the lid member 30.
As a result, it is possible to realize a state in which the liquid passage port 5 and the discharge port 20 are opened (FIGS. 6 and 7).

Next, when the tip of the flap 29 in the opened state is pressed downward, the flap 29 is sandwiched by the inner member 31 of the stopper.
An upward force acts on the base end side, and this force disengages the engagement surfaces of the flap 29 and the stopper lid member 30, and the coil spring 11 urges the base end side of the flap 29 and the push button 28 together. Move up. At the same time, the tip side of the flap 29 moves downward to close the discharge port 20 and return to the closed state. At this time, the valve body 6 also rises due to the urging of the coil spring 11, contacts the plug packing 57 mounted on the lower outer peripheral portion of the plug body 19, and closes the liquid passage port 5.

The plug body 13 having the above structure can be manufactured, for example, as follows. First, the movable portion C is configured by joining the push button 28 and the flap 29 so that the side wall 35 of the flap 29 covers the support 33 of the push button 28. Next, the support 33 of the push button 28 is inserted into the plug inner member 31, the flap 29 is housed in the plug lid member 30, and the flap 29 is positioned so that the tip of the flap 29 is on the discharge port side. The member 30 is forcibly fitted to the plug inner member 31. Through the above steps, the upper lid member unit B is integrally formed.

On the other hand, a plug packing 57 is attached to the plug body 19 at the predetermined position on the outer peripheral portion. Next, the valve stem portion 10 of the valve body
After attaching the valve stem packing 27 to the valve body 6, the valve body 6 is inserted from the bottom of the stopper body 19, the coil spring is provided around the valve stem 10 from above, and the valve stem cover 25 is press-fitted into the valve stem 10. And wear it. By this step, the plug body 19 is unitized. Finally, the upper lid member unit B is attached to the unitized plug body 19 to complete the assembly of the plug body.

The plug body having the above-mentioned structure has the first body at the lower end portion of the body.
A flange 53, a second flange 54, and a third flange 55 are formed, and the cavity 6 having an opening on the inner surface is formed therein.
The side surface mounting portion 58 of the annular packing packing 57 made of an elastic body having 2 is press-fitted between the first flange 53 and the second flange 54, and the convex portion 56 is press-fitted into the recessed portion 60a of the bottom surface mounting portion 60. And is attached so that a cavity surrounded by the outer wall of the edge member 52, the lower surface of the second flange 54, the upper surface of the third flange 55, and the inner surface of the plug packing 57 is formed. Therefore, the side mounting portion 58 of the plug packing 57 is fixed between the first flange and the second flange, and the bottom mounting portion 60 of the plug packing 57 is
The concave portion 60a is fitted and fixed to the convex portion 56 of the plug main body, the plug packing 57 is strongly gripped, and even if a force in the axial direction or the radial direction acts on the plug packing 57,
There is no worry that it will come off. The second flange 54 and the third
Since the flange 55 of is inserted into the cavity 62 of the plug packing 57, the cavity is securely held when the container is attached. Therefore, even if the elasticity of the sealing portion 59 of the plug packing 57 is reduced after the plug body 13 is used for a long period of time, the hollow shape of the plug packing 57 is maintained, so that the sealing performance of the plug packing is not deteriorated. You can

The above-mentioned sealing member used in the plug of the present invention is not limited to the above-mentioned embodiment, but any ring-shaped sealing member made of an elastic body and having a cavity opening on the inner side surface can be used. The shape and the type of elastic body are not particularly limited. Further, the operating mechanism of the valve body of the stopper is not limited to the above-mentioned embodiment, and the sealing member having the above-mentioned configuration can be widely applied to the stopper of a commonly used liquid container.

[0023]

According to the present invention, the sealing member for stopping water between the stopper and the container body forms a hollow portion between the stopper and the lower peripheral portion of the stopper. Since it is provided, when the stopper is attached to the container, the sealing member is deformed so as to press the space portion, and is pressed against the inner wall neck portion of the container, so that the sealing performance is high. Therefore, by appropriately setting the collapsing margin of the sealing member, sufficient water shutoff can be achieved already in the state where screwing for mounting on the container has started.
It is possible to position a particular spout orientation with respect to the container.

Further, since the sealing performance of the sealing member in the lower portion of the stopper is high and water is surely stopped between the outer peripheral surface of the stopper and the inner surface of the container, sealing in the upper portion of the stopper, which has been essential in the past, is ensured. Can be omitted, the number of sealing members can be reduced, the number of steps can be reduced, and the assembling cost can be reduced.

Further, the sealing member is locked by at least one step flange formed between the lower surface of the flange and the lower end of the stopper body, and a convex portion formed near the peripheral portion of the lower surface of the stopper body, and a sealing member. By attaching the sealing member to the plug body by engaging with the concave portion provided at the position facing the convex portion of the member, the sealing member is strongly gripped, and the force in the axial direction or the radial direction at the time of cleaning or the like. Even if is applied, there is no concern that the sealing member will come off.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state when a stopper of a liquid container of the present invention is closed.

FIG. 2 is a cross-sectional view showing a conventional packing used for a stopper of a liquid container.

FIG. 3 is a cross-sectional view showing a state in which a stopper packing is attached to the stopper of the liquid container of the present invention.

FIG. 4 is a perspective view showing a state when the stopper of the liquid container of the present invention is closed.

5 is a cross-sectional view taken along the line AA ′ in FIG. 4, showing a state when the stopper of the liquid container of the present invention is closed.

FIG. 6 is a cross-sectional view showing a state when the stopper of the liquid container of the present invention is opened.

7 is a cross-sectional view taken along the line BB ′ in FIG. 6, showing a state when the stopper of the liquid container of the present invention is opened.

FIG. 8 is a cross-sectional view showing an example of a conventional plug body.

[Explanation of symbols]

4 ... liquid passage, 5 ... liquid passage port, 6 ... valve body, 12 ... container body,
13 ... Plug body, 19 ... Plug body, 21 ... Outer cylinder part, 22 ... Inner cylinder part, 28 ... Push button, 53 ... First flange, 5
4 ... 2nd flange, 55 ... 3rd flange, 56 ... convex part, 57 ... plug packing, 58 ... side attachment part, 60a ... concave part, 62 ... cavity.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takashi Kato 1435 Shimonakano, Yoshida-cho, Nishikanbara-gun, Niigata Prefecture Nihon Oxygen Co., Ltd.

Claims (3)

[Claims] 1. A plug main body which is detachably mountable to a liquid container main body, is composed of an inner cylinder part and an outer cylinder part, and a liquid passage is formed between the inner cylinder part and the outer cylinder part, and the inner cylinder part. A plug body slidably provided inside of the plug body, the valve body opening and closing the lower end portion of the liquid passage in conjunction with pressing of a push button arranged on the upper surface of the plug body, A flange is formed on the outer surface of the lower end of the flange outwardly in the radial direction, and is formed of an elastic body at a position in contact with the upper surface of the valve body in the closed state from the lower surface of the flange, and has a cavity having an opening on the inner surface. 2. A stopper for a liquid container, characterized in that the sealing member of (1) is provided around. 2. The flange of at least one step is formed between the lower surface of the flange and the lower end of the plug body, and the sealing member is locked by the flange. A stopper for the liquid container described. 3. A protrusion is provided in the vicinity of the peripheral edge of the lower surface of the stopper body, and a recess is provided at a position facing the protrusion of the sealing member, and the protrusion of the stopper body and the recess of the sealing member are provided. The stopper of the liquid container according to claim 1 or 2, characterized in that