JPS6349237Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a screw stopper that is screwed onto the mouth of a container so that it can be opened and closed.

In a typical screw stopper, as shown in FIG. 1, for example, a container opening 2 is connected to an opening 3a of an inner container 3, a communication opening 4a between the opening 3a and one side. In a heat insulator body 1 consisting of a spout section 4 having a liquid injection path 4b, a screw stopper 5 is screwed onto the inner periphery of a cylindrical wall section 4c around a communication port 4a formed in the spout section 4. The screw plug 5 opens and closes the communication port 4a by vertical movement when it is rotated, and opens the communication port 4a upward by being unscrewed.

In this way, when the screw stopper moves up and down to open and close the communication port 4a, in order to increase the degree of sealing, it is necessary to forcefully press the packing 6 attached to the outer periphery of the stopper 5 around the communication port 4a. Then, tighten the stopper 5 firmly. In order to do so, the operational resistance due to friction of the packing 6 becomes strong, making it difficult to open and close, and the packing 6 becomes twisted between the stopper 5 and the communication port 4a, shortening its life. In order to solve this problem, it has been proposed that the packing 6 is rotatably attached to the plug body 5. However, this structure is complicated, and the sealing effect inevitably decreases at the rotational boundary between the packing 6 and the stopper 5, and when keeping the temperature at a constant temperature under internal pressure, such as when brewing yogurt, The air inside the container body 1 leaks to the outside with heat, making the heat retention function insufficient. In the case of yogurt brewing, etc., this may slow down the completion speed or cause the brewing to fail.

On the other hand, there is a method disclosed in Japanese Patent Publication No. 14551/1983. This is so that the seal packing provided on the outer periphery of the closure is always biased in the direction of diameter expansion, and when the closure is attached or removed, the operating section is pushed against this biasing force, causing the seal packing to contract in diameter. This is what I did.

However, this is not a screw-in type screw stopper,
The closure is designed to be fixed to the container by the frictional resistance generated when the closure packing is pressed against the inner circumference of the container mouth, so if this is applied to a screw closure, the closure will have to be rotated for attachment and removal. During operation, there is a difficulty in having to keep the diameter contracted state by pushing the operating section. If you do not continue to push it, the seal packing will expand in diameter and press against the inner periphery of the container mouth, making it impossible to rotate the closure.

This invention consists of a seal packing whose outer periphery faces the inner periphery of the container mouth at the loosely fitting part of the screw stopper into the container mouth, and a seal packing that is compressed or released from above and below between the screw stopper and the screw stopper. a clamping member that expands the diameter to a sealed state or reduces the diameter to a sealed state; and a clamping member that is externally operable connected through the inside of the screw stopper to place the clamping member in a clamping state and a clamping release state. By providing a packing diameter expansion/contraction operation means for switching, and by providing a state holding means for holding the packing diameter expansion/contraction operation means in a switchable manner between the pinching state and the pinching release state, the present invention is able to overcome the drawbacks of the conventional method. The object of the present invention is to provide a screw stopper that provides a good sealing effect. To explain the embodiment shown in FIG. 1, the screw plug 5 has a thread 5b formed on the outer periphery of the large diameter upper half 5a, which threads 4d on the inner periphery of the cylindrical wall 4c. Communication port 4a at the bottom of
It also has a small diameter loose fitting portion 5c formed to loosely fit into the inner container mouth portion 3a. An annular groove 5d is formed on the outer periphery of the base of the loose fitting part 5c, and this annular groove 5d
The packing 6 is fitted into the padding 6. Free fitting part 5
A seal packing 7 whose outer periphery faces the inner periphery of the inner container opening 3a is provided below c.
The outer diameter of the plug 5 is expanded or contracted by a packing diameter expansion/contraction operating means 8 provided in the stopper 5 so as to be operated externally.

The packing diameter expansion/contraction operating means 8 sandwiches the sealing packing 7 between the loose fitting part 5c and a vertically movable plate 9 disposed below the loosely fitting part 5c, and changes the distance between the vertically moving plate 9 and the loosely fitting part 5c to cause the packing 7 to The outer diameter of the packing 7 is expanded or contracted by tightening or weakening the clamping force on the upper opening 5 of the upper half 5a.
The lower end of the vertically movable rod 11 has a disc-shaped operating body 10 rotatably held in the direction e, and a screw portion 11a is screwed into the center of rotation of the bottom plate 10a of the operating body 10, and the lower end of the vertically movable rod 11 is connected to the lower end of the loose fitting portion 5c. The lower end large diameter portion 11b of the vertically movable rod 11 is connected to the vertically movable plate 9 so that it can move up and down integrally with the vertically movable plate 9 and can rotate in a single action. Further, a large diameter head portion 11c is provided at the upper end of the threaded portion 11a. 5f and 9a are loose fitting parts 5c
It is an annular wall formed on the lower surface and the upper surface of the vertical moving plate 9, and receives the inner circumferential surface of the seal packing 7.

An internal pressure relief hole 9d is bored in a part of the area surrounded by the annular wall 9a of the vertically movable plate 9, and the hole 9d is always closed by a safety valve 14 which is given downward sliding property by a spring 13. When the internal pressure of the container body 1, that is, the internal pressure of the inner container 3 exceeds a certain pressure, for example, the allowable pressure of the inner container 3, the safety valve 14 releases the spring 13.
It is pushed open to release internal pressure. 9b is a valve guide wall formed on the upper surface of the vertical moving plate 9, and has an internal pressure relief groove 9c. 5g is a spring receiver formed on the lower surface of the loose fitting part 5c, and 5h is an auxiliary internal pressure relief hole formed in the bottom wall of the loose fitting part 5c.

The seal packing 7 is normally in a reduced diameter state (a seal released state) as shown by the imaginary line in FIG. 1, and does not contact the inner container opening 3a. The vertical movement plate 9 is always in contact with the seal packing 7 and its rotation is restricted by frictional resistance, whereas the vertical movement rod 11 is connected to the connection 12 with the vertical movement plate 9 and the bottom wall of the loose fitting part 5c. At the penetrating portion, the vertical moving plate 9 connects to the seal packing 7.
The degree of fitting etc. is adjusted such that the mutual frictional resistance at the threaded portion of the vertically movable rod screw portion 11a and the operating body 10 is further reduced. It has been adjusted.

As described above, even if the operating body 10 is rotated, the vertically movable rod 11 will not rotate with it except in specific cases. Since the threaded portion 11a of the vertically movable rod 11 is a right-handed screw, when the operating body 10 is rotated to the right when viewed from above, the vertically movable rod 11 is rotated relative to the operating body 10 at the threaded portion 11a. The vertical moving plate 9 is drawn against the loose fitting portion 5c. Therefore, the seal packing 7 is compressed between the loose fitting part 5c and the vertically movable plate 9, and is deformed so that its outer diameter expands as shown by the solid line in FIGS. 3a is crimped to the inner periphery (closed state). This degree of crimping is determined by the loose fitting portion 5c against the seal packing 7.
and the degree of clamping pressure between the vertical moving plate 9, that is, the operating body 1
It can be freely adjusted by adjusting the degree of rotation of 0, and the required degree of sealing can be obtained.

When the inner container 3 is easily damaged like the vacuum double bottle shown in the figure, it is desirable that the compression of the seal packing 7 to the inner container opening 3a be regulated so as not to exceed a certain limit. . Such a restriction can be easily achieved, for example, by bringing the annular walls 5f and 9a into contact with each other, or by restricting the screwing range between the vertically movable rod screw portion 11a and the operating body bottom plate 10a.

In FIGS. 1 and 2, when the operating body 10 is rotated to the left when viewed from above, the vertically movable rod 11 is moved downward by the relative rotation of the threaded portion 11a with the operating body 10. The clamping pressure on the seal packing 7 between the movable plate 9 and the loose fitting portion 5c is released. The outer periphery of the packing 7 whose clamping pressure has been released reduces its diameter and separates from the inner periphery of the inner container opening 3a as shown by the imaginary line in FIG. 1, releasing the sealed state. At the final stage of this seal release operation, the bottom plate 10a of the operating body is moved up and down by the vertical movement lever 1.
1, the operating body 10 becomes unable to rotate independently with respect to the vertically movable rod 11, and attempts to rotate together with the vertically movable rod 11, and thereafter, the vertically movable rod 11 and the vertically movable plate 9, Seal plug packing 7, loose fitting part 5
It rotates along with the entire stopper 5 via c. Due to this entire rotation, the plug 5 gradually opens the communication port 4a and is further unscrewed from the cylindrical wall portion 4c.

Further, the unscrewed plug 5 can be screwed onto the cylinder wall 4c by rotating the operating body 10 clockwise when viewed from above, and the plugging 6 contacts around the communication port 4a to provide a certain level of frictional resistance. By causing
The operating body 10 starts to rotate independently, and the diameter of the seal packing 7 is expanded and the seal is sealed thereby.

Here, the opening of the container body 1 is sealed by a sealing packing 7, and the packing 6 makes an elastic contact for regulating the screwing position of the stopper 5 with respect to the spout member 4, and the sealing function is particularly required. Not done.

The sealing and releasing operations are performed by the independent rotation of the operating body 10, and there is no sliding friction part involving a packing member with a large coefficient of friction, and the operation can be performed easily. Further, the screwing and unscrewing of the stopper 5 is done with the sealing plug packing 7 separated from the inner periphery of the inner container opening 3a, and in the final or initial stage of operation, the plugging 6 and the communication port 4a, which are not required to have a sealing function, are attached and unscrewed.
This can be done easily by just receiving some frictional resistance due to light contact with the surroundings, and the packing 6 can also be omitted.

The safety valve 14 must be sealed by the seal packing 7 to prevent pressure leakage until the inside of the container 1 reaches a predetermined pressure.If necessary, the safety valve 14 may be used in combination with the seal packing 15 as shown in FIG. Ru.

In the embodiments shown in FIGS. 3 and 4, the stopper 5 has a head 5i integrally provided at the upper end of its large-diameter upper half 5a to perform each operation of screwing on and unscrewing.
The upper end is connected 22 to a cam 21 located on the upper surface of the head 5i, and when the protruding surface 21a centered on the connecting 22 portion is in contact with the upper surface of the head 5i, the cam 21 is connected to the vertically movable rod 11 and The vertically movable plate 9 is pulled up to expand the diameter of the seal packing 7, and the seal packing 7 is switched to and stabilized as shown by the solid line in Fig. 3, and on the other hand,
When the non-protruding surface 21b is in contact with the upper surface of the head 5i, the vertically movable rod 11 and the vertically movable plate 9 are allowed to move downward as the seal packing 7 is restored, and the seal is released as shown by the imaginary line in FIG. 3 when the packing 7 is restored. This is done to stabilize the system. 21c is an operating piece of the cam 21, and 5j is a recessed portion of the head 5i in which the cam 21 is provided.

Further, the seal packing 7 tightly seals the container body 1 between the spout member 4 and the communication opening tube 4f that covers the inner periphery of the inner container mouth portion 3a, which is preferable for the safety of the inner container 3. The safety valve 14 is housed in a valve chamber 23, and the valve chamber 23 is opened and closed by attaching and detaching the cap 24. Although the safety valve 14 acts on the hole 5h in the bottom wall of the loose fitting portion 5c,
It is also possible to act on the hole 9d of the vertical moving plate 9 as in the above embodiment. 25 is a communication hole opened in the cap 24. The design of the safety valve 14 can be changed freely, such as a self-locking type as shown in FIG. 5 or a leaf spring type as shown in FIG.

In FIG. 7, the outer periphery of the annular wall 9a of the vertically movable plate 9 is made into a tapered surface so that the diameter expanding action on the seal packing 7 can be performed more reliably. Also,
The inner container 3 is a metal vacuum double container made of a metal material with low thermal conductivity such as stainless steel.

FIG. 8 shows how the operating lever 31 is pivotally mounted 32 in the recess 5j of the head 5i of the stopper 5.
The upper end of the vertically movable rod 11 is connected to the upper end of the vertically movable rod 11 via the link 33, and when the lever 31 is in the solid line position, the vertically movable rod 11 and the vertically movable plate 9 are pulled up to create a sealed state in which the diameter of the seal packing 7 is expanded. Then, the vertically movable plate 9 is stabilized at a position beyond the dead point due to the restoring force of the packing 7. At the imaginary line position, the vertically movable rod 11 and the vertically movable plate 9 are allowed to move downward to restore the packing 7, and the seal is released. In this embodiment, the vertically movable rod 11 may be omitted and the link 33 and the vertically movable plate 9 may be directly connected.

According to this invention, a sealing packing whose outer periphery faces the inner periphery of the container opening is provided at the loosely fitting part of the screw stopper to the container opening, and the outer diameter of the packing is determined by the opening/closing, screwing, and unscrewing of the screw stopper. Regardless of the operation, the outer periphery of the packing is expanded or contracted by an externally operated expanding/reducing means to press the outer periphery of the packing against the inner periphery of the container mouth, or the outer periphery of the packing is released, resulting in a sealed state and a release state in which the seal is released. Since the screw stopper can be switched and maintained in each state, a sufficiently sealed state can be obtained without any difficulty in opening/closing the screw stopper and screwing on/unscrewing the screw stopper.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of a handy pot showing one embodiment, Fig. 2 is an enlarged sectional view of the main part, Fig. 3 is a sectional view of the main part of another embodiment, and Fig. 4 is a partially enlarged sectional view. , FIGS. 5 and 6 are partially enlarged sectional views showing different modifications, respectively. FIG. 7 is a partially sectional view of another embodiment, and FIG. 8 is a partially sectional view of another embodiment. It is a diagram. 1... Container body, 2... Container mouth, 3... Inner container, 5
...screw plug, 5c... loose fitting part, 7... seal packing, 9... pinching member, 8... packing diameter expansion/contraction operation means, 11a... threaded part (threaded connection part), {21a... protrusion surface, 21b...non-protruding surface}
(cam part), {31... operating lever, 33... link} (lever link mechanism).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a screw stopper that is inserted into the mouth of a container so that it can be opened and closed by screwing, a sealing plug whose outer periphery faces the inner periphery of the mouth of the container is provided at the part that loosely fits into the mouth of the container. , a clamping member that clamps or releases the clamping pressure from above and below between the seal packing and a screw stopper to expand the diameter of the seal packing to a sealed state or contract the diameter to a sealed state, and this clamping member and a screw. A packing diameter expanding/reducing operating means is provided which is externally operable connected through the plug and switching the pinching member between a pinching state and a pinching release state, and the packing diameter expanding/reducing operating means is configured to switch between the pinching state and the pinching release state. A screw stopper characterized in that it is provided with a state holding means that is switchably held. (2) The screw plug according to claim 1, wherein the state maintaining means is a screw connection part provided in the middle of the connection part between the packing diameter expansion/contraction operation means and the clamping member. (3) The state holding means is a cam part that is provided as a part of the packing diameter expansion/contraction operation means and switches and stabilizes the clamping member between the two states according to the posture of contact with the plug body, according to the utility model registration request. A screw stopper as described in Range 1. (4) The state holding means is a lever link mechanism connected to the clamping member of the packing diameter expansion/contraction operation means so as to have a dead point in the middle of the switching operation between the two states.Claim 1 of the Utility Model Registration Claim. Screw stopper as described.