JP2009046184A - Twisting-off seal opening mechanism for vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a twisting-off seal opening mechanism, which enables an operator to surely sense completion of twisting-off of a sealing member, in a spout-cap assembly to be opened by twisting off the sealing member of the liquid passage of a spout by a cap. <P>SOLUTION: The twisting-off seal opening mechanism comprises double sides projections arranged along an imaginary circle around the rotation central line and abutting projections relatively movable with respect to the double sides projections along the imaginary circle, while either the double sides projections or the abutting projections for expressing the completion of twisting-off are fixed onto the spout 2, whereas the other protrusions are fixed to the cap 3. The double sides projections comprise slightly slanting sliding surfaces whose projecting heights in a radial direction are approximately equal, and steeply tilted stopper surfaces, both surfaces are located adjacent to each other along the circle, while the abutting projections are capable of coming in contact with both the sliding surface and the stopper surface. At a position where the abutting projection pass through the sliding surface in a rotating direction, the relative rotative positions of the spout 2 and the cap 3 are at or past the positions of completion of twisting-off of the sealing member 15, and also at the separation allowance position wherein the separation of the cap 3 is allowed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a twisting and unsealing mechanism for twisting and unsealing a content dispensing portion composed of a spout and a cap used for a container for storing fluid contents.

Among the structures of the contents extraction member of the container, there is a twist-opening type of a spout and a cap. For example, an infusion container is a container filled with an infusion agent such as a nutritional agent or a pharmaceutical agent as a content, and the infusion agent is injected from the infusion container into a patient through a catheter.
As such an infusion container, a pouch container comprising a flexible bag container has been developed and put into practical use. A spout whose liquid passage is closed is attached to the spout of the infusion container, and a cap is attached to the outside of the spout to protect the spout and prevent an untimely opening of the liquid passage. This spout and cap constitute a spout-cap assembly.
When performing an infusion operation as a content pouring operation, the cap is removed, the spout spout is opened, and the spout is connected to the catheter. As a device for simplifying the infusion operation and reducing the burden on the wearer, the spout-cap assembly has the following configuration.
That is, the cap removing operation is simultaneously the opening operation of the spout spout, and the conventional techniques of such a configuration are described in Patent Documents 1 to 4.

JP 2002-293361 A JP 2002-211153 A Noto 2605789 JP 2006-27662 A Japanese Patent Laid-Open No. 6-23013 JP 2004-131086 A JP 2000-43908 A

In Patent Documents 1 and 2, the upper end of the liquid passage of the spout is sealed with a sealing member, and the cap is covered with the spout. On the other hand, a space of a size capable of receiving a spout sealing member is provided at the upper end inside the cap. In a state in which the cap is covered, the spout sealing member is inserted into the void of the cap, and the spout and the cap are integrally coupled.
When the contents are poured out of the container, it is necessary to remove the cap. However, if the cap is pulled up while rotating as this operation, the sealing member remains held by the cap, so the sealing member is twisted from the spout. It is cut off and the spout opens. However, since the completion of the threading of the sealing member due to the rotation of the cap cannot be clearly determined, useless rotation of the cap tends to occur.
Next, in the spout-cap assembly described in the cited document 3, the longitudinal groove of the sealing member and the longitudinal groove of the cap space are engaged with each other, and the cap is held by the cap, but the spout has a cam mechanism. Therefore, when the cap is rotated, the cap is lifted by the cam mechanism. After all, the sealing member and the cap can be changed relative to each other in the vertical direction. There is a risk that the stop member may come off from the void of the cap and fall off.
The spout-cap assembly described in Patent Document 4 has a structure that prevents the sealing member from falling off the cap.
However, it is important for the operator to sense that the threading of the sealing member has been completed in order to prevent an erroneous operation at the time of opening. Since the body does not have means for allowing the operator to detect the completion of such an operation, an erroneous operation is likely to occur.
For this reason, the present invention ensures to the operator that the threading of the sealing member is completed in the spout-cap assembly of the type in which the sealing member of the liquid passage of the spout is twisted and opened by the cap. It is an object of the present invention to provide a mechanism for twisting and unsealing a spout-cap assembly that can be sensed by the operator and prevent an operator from malfunctioning.

Corresponding to this object, the threading and opening mechanism for a container according to the present invention comprises a spout attached to a spout part of a container and a cap removably attached to the spout. A threading opening mechanism for twisting and unsealing a sealing member for closing a passage by rotation about a rotation center line of the cap;
The spout has the liquid passage communicating with the inside of the container at a base end in a cylindrical body, and a tip of the liquid passage is connected to the body of the spout so as to be able to be twisted. Including the sealing member that seals, and a twist-open opening display mechanism that represents a position where the sealing member is completely twisted,
The cap has a cylindrical wall that forms a cylindrical space in which a lower end portion capable of concentrically inserting at least an upper portion of the trunk portion of the spout is open,
The twist open display mechanism includes a double-sided protrusion disposed along a virtual circle that goes around the rotation center line and a contact protrusion that is relatively movable along the virtual circle, and the double-sided protrusion One of the contact protrusions is fixed to the spout and the other protrusion is fixed to the cap. The double-sided protrusion has a gently inclined sliding surface and a steeply inclined stopper having substantially the same protruding height in the radial direction. And the contact projections can contact the sliding surface and the stopper surface, and the spout is positioned at a position where the contact projection passes through the sliding surface in the rotation direction. The relative rotation position with respect to the cap is configured to be in a disengagement-permitted position that exceeds the threading completion position where the threading of the sealing member is completed and allows the cap to be detached,
A rotation transmitting portion capable of transmitting relative rotation around the center line of the cap to the sealing member by contacting the sealing member of the spout at an upper portion of the cylindrical void; A sealing member holding structure capable of receiving and holding the sealing member of the spout at an upper portion of the spout.

In the first aspect of the present invention, the threading completion position of the sealing member can be expressed by the threading opening display mechanism.
This twist-opening display mechanism is designed to trace the contact protrusion on the gently inclined sliding surface of the double-sided protrusion having a gently inclined sliding surface and a steeply inclined stopper surface on the front and back, thereby making contact with the inclined surface. By utilizing the change in the height of the points, the operator can perceive the change in resistance, and the state change during the threading and the end of the threading can be expressed in a pseudo manner.
In this case, if it is possible to show the progress of the threading of the sealing member, the operator can expect that the end stage of the threading operation is approaching, and the operator can be afforded a margin to make adjustments. This is particularly effective in avoiding erroneous operations. In order to display the progress and state change of twisting, it is effective to generate a change in operating resistance of twisting using a slope.
As shown in Patent Documents 5 to 7, there is a case where a lock mechanism for preventing reverse rotation of the container and the lid is provided by using an operation protrusion, but this lock mechanism is exclusively used to prevent the reverse rotation of the wedge-shaped protrusion. However, the final state of the container with the lid can be displayed, but a change in the state on the way cannot be shown.

  According to the second aspect of the present invention, when two or more double-sided projections are provided, the rotation angle between the abutting projection and the sliding surface disposed between the opposed sliding surfaces is the sealing member. Since the rotation angle is greater than the rotation angle required for twisting, the twisting is reliable.

  In the invention described in claim 3, two or more double-sided protrusions are provided, and the angle around the cap rotation center line between the opposed sliding surfaces is at least twice the rotation angle required for twisting off the sealing member. Since there is, the threading is sure.

  In the invention described in claim 4, since the rotation angle required for removing the cap in the twisting-opening operation is set to 45 ° to 130 °, the sealing member is reliably twisted in the opening operation. Can be cut and opened.

  In the invention described in claim 5, it is possible to adopt a structure in which the cap and spout can be easily engaged and released.

  According to the invention described in claim 6, since the drain hole or drain groove portion is provided in the cap, draining and drying in the cleaning process are easy.

  According to the invention described in claim 7, since the clearance between the contact surface of the rotation transmission portion of the cap and the contact surface of the sealing member is set to be extremely small, there is little play of the sealing member, Since the positioning of the rotation transmission part and the sealing member is reliable, the transmission of the rotational force from the rotation transmission part to the sealing member is reliable, and the sealing member is reliably twisted.

Details of the present invention will be described below with reference to the drawings.
1 to 6, reference numeral 1 denotes a spout-cap assembly.
The spout-cap assembly 1 is composed of a spout 2 attached to the spout part 5 of the container 4 and a cap 3 fitted on the spout 2. Between the spout 2 and the cap 3, a later-described twist-open opening display mechanism 41, a locking mechanism 42, and a sealing member holding structure 43 are provided.

As shown in FIGS. 7 to 12, the spout 2 has a container mounting portion 6 and a trunk portion 7 that communicate with each other. The container attaching part 6 is a part for attaching the spout 2 to the spout part 5 of the container 4 in a liquid-tight manner. The container attaching part 6 is inserted into the spout part 5 of the container 4 and is adhered to the material of the container 4 at the outer peripheral part 8.
The body portion 7 has a liquid passage 11 (FIG. 12) inside. The base end portion 12 of the liquid passage 11 communicates with the liquid passage 13 (FIG. 7) of the container mounting portion 6. It communicates with the inside of the container 4.
Since the outer periphery of the trunk portion 7 is a portion to be inserted into a catheter tube (not shown), four steps of anti-slip steps 14 are formed in this portion. The upper end of the liquid passage 11 is closed by a sealing member 15, and the sealing member 15 is connected to the body portion 7 by a thin portion 16, and the sealing member 15 is twisted around a center line 17 of relative rotation. Then, the thin portion 16 is twisted off, the sealing member 15 is separated from the body portion 7, and the liquid passage 11 is opened. The cap 3 described later functions as a tool for rotating and twisting the sealing member 15 around the center line 17, but the coupling between the cap 3 and the cap 3 is ensured to ensure the coupling with the cap 3. A sealing member holding structure 43 is provided to prevent idle rotation that is a relative rotation.
A guard collar 30 is provided immediately above the container mounting portion 6 and a jump-over preventing projection 85 is provided at both ends to prevent the guard collars 30 from getting on each other when transporting a plurality of spouts 2 after manufacture. is doing.

On the other hand, the cap 3 has a cylindrical cylindrical wall 25 as shown in FIGS. 13 to 19, and the cylindrical wall 25 is a cylindrical cylinder in which at least the upper part of the spout 2 can be fitted concentrically. The upper end of the cylindrical void 27 is closed by a top plate 28 fixed or connected to the cylindrical wall 25, and the lower end 29 of the cylindrical void 27 is open. The cylindrical wall 25 is composed of an upper small-diameter portion 31 and a lower large-diameter portion 32 with a shoulder portion 33 at the bottom as a boundary. A draining hole 83 is formed through the upper end of the cap 3 cylindrical wall 25 (FIG. 14), and a draining groove 84 (FIG. 17) is formed on the inner surface of the cylindrical wall 25.

As described above, the spout cap assembly 1 is provided with the twist open display mechanism 41, the locking mechanism 42, and the sealing member holding structure 43.

The twist open display mechanism 41 includes a double-sided protrusion 51 formed on the cap 3 and a contact protrusion 52 formed on the spout 2. The abutment protrusion 52 exhibits a function of expressing the threading completion position of the sealing member 15 in cooperation with the double-sided protrusion 51 of the threading opening display mechanism 41 attached to the cap 3. As shown in FIGS. 16 and 20, the double-sided protrusion 51 is formed on the inner surface of the trunk portion 7 slightly above the lower end 29 of the cap 3, and is a virtual circle that goes around the center line 17 including the arc surface of the cap inner cylinder. It is arranged along a circle 53 (FIGS. 16 and 20), and a gently inclined sliding surface 54 and a steeply inclined stopper surface 55 are adjacent to each other back to back along the circle. On the other hand, the contact protrusion 52 is formed along the circle with the spout 2.

Projecting radially outward. The abutment protrusion 52 can abut against the sliding surface 54 and the stopper surface 55. However, the abutment protrusion 52 is elastically applied to the sliding surface 54 having a relatively gentle slope by rotating the cap 3 with force. Even if the cap 3 is rotated with such a force against the stopper surface 55 which can slide over the sliding surface 54 while being deformed and can almost get over the steep steep slope, the contact protrusion 52 Can not get over. At least two double-sided projections 51 (four in FIGS. 16 and 20) are arranged along a circle 53. At this time, the spacing between the contact projection 52 and the sliding surface 54 is reduced by rotating the sealing member 15. It is preferable that the angle of rotation is equal to or greater than that required for twisting the portion 16.

The rotation angle required to twist the sealing member 15 is slightly different depending on the material constituting the spout 2, but is about 45 to 130 degrees when made of polyethylene.
There are various arrangements of the double-sided protrusions 51 depending on the angle at which the sealing member 15 is desired to be broken and the angle at which the cap 3 is to be stopped. For example, two are provided as shown in FIG. 21 and 4 are provided as shown in FIG. 22 or two as shown in FIG. 22, and correspondingly the contact protrusion 52 is 1 as shown in FIG.

Two pieces are provided as shown in FIGS. 20 and 22, but may be increased as appropriate. When two or more double-sided protrusions 51 are provided, the contact protrusion 52 is disposed between the opposite sides of the double-sided protrusion 51 (the side where the sliding surfaces face each other), and the contact protrusion 51 and the double-sided protrusion slide. The angle interval with respect to the surface side (θ1, θ2, or θ3 in FIGS. 21 and 22) is equal to or larger than the rotation angle necessary for twisting off the sealing member 15, and the angle interval on the opposite side of the double-sided protrusion 51 (in FIG. 21). θ1 + θ2 and θ1 + θ3) in FIG. 22 are more than twice the necessary rotation angle. Note that θ1 = θ2 in FIG.

The spout 2 is provided with a plate-like contact protrusion 52 of the twist-open opening display mechanism 41. That is, a plate-like contact protrusion 52 is formed so as to protrude from the surface of the trunk portion 7 of the spout 2 in a direction perpendicular to the center line 17. The contact protrusion 52 has a shape such that the side facing the center line 17, that is, the side surface of the inner side is fixed to the spout 2 and the upper end and the outer side surface are exposed. A shape in which the lower end of the contact protrusion 52 is also exposed may be used. However, when the reinforcing collar 56 exists below as in the present embodiment, a shape in which the reinforcing collar 56 is connected and fixed thereto is preferable.
In this case, the height h1 (FIG. 8) from the upper end of the reinforcing collar 56 to the upper side 57 of the contact projection 52 is the upper surface of the reinforcing collar 56 and the cap 3 when the cap 2 is mounted on the spout 2. When the cap 3 is attached to the spout 2, the upper side 57 is in contact with the projections 51 on both ends of the twisted-open opening display mechanism 41. As shown in FIG. 20, the length of the upper side 57 in the diameter direction is d3, and d3 is smaller than the diameter D1 of the virtual circle 53, and D1 = d3 + (some length). Since t) + (some length t ′), the contact protrusion 52 enters the circle 53 of the cylindrical wall 25.
In this embodiment, the double-sided protrusion 51 is provided on the cap 3 and the contact protrusion 52 is provided on the spout 2. However, in other embodiments, conversely, the double-sided protrusion 51 is provided on the spout 2 and the contact protrusion 52 is provided. The cap 3 may be provided. The reinforcing collar 56 may have a lower surface for hanging and conveying the spout 2 after manufacturing.

Next, the spout-cap assembly 1 is provided with a locking mechanism 42 as shown in FIG. The locking mechanism 42 enables the cap 3 to be attached to the spout 2 by plugging, and prevents the spout 2 and the cap 3 from coming out when the spout 2 and the cap 3 are at a rotation angle position where the spout 2 and the cap 3 should not come out. A mechanism for allowing the cap 3 to be pulled out when the cap 3 is pulled out from the spout 2, and is provided with a mechanism for resisting the cap from being pulled out. An extended spout side locking piece 61 (FIGS. 7 and 8) and a cap side locking piece 62 (FIGS. 17 and 18) extending inward in the direction perpendicular to the center line 17 from the cap 3, respectively. The spout side locking piece 61 and the cap side locking piece 62 can both interfere with each other in the direction of the rotation center line 17 provided in a predetermined angle range around the rotation center line 17. When the spout 2 and the cap 3 are at a predetermined relative angular position, the undercut portions 63 and 64 are in a position where the undercut portions 63 and 64 interfere to prevent the cap 3 from slipping out. In addition, when the spout 2 and the cap 3 are at the allowance for removal, which is a relative angle position out of the position for preventing the removal, the interference between the undercut portions 63 and 64 is removed, and the removal of the cap 3 is allowed.

Next, the spout-cap assembly 1 is provided with a sealing member holding structure 43.
In this embodiment, as shown in FIG. 9, in the spout 2, the outline shape of the sealing member 15 perpendicular to the center line 17 of the relative rotation has a circular center portion 71 and locking blades 72 projecting radially outward. As shown in FIGS. 8 and 11, a downwardly extending locking rod 73 projects from the cylindrical side surface of the central portion.

On the other hand, a sealing member holding portion 74 and a contact portion 75 are provided near the upper end of the small diameter portion 31 of the cap 3.

The sealing member holding portion 74 includes a holding rod 77 that protrudes toward the center in the direction of the center line 17, and each holding rod 77 extends from the side surface of the sealing member 15 that has entered the sealing member holding portion 74. The sealing member 15 is held without being detached in the sealing member holding portion 74 by engaging with the extending locking rod 73. When fitting the cap 3 to the spout 2, the holding rod 77 gets over the engaging rod 73 and engages.

The contact portion 75 includes a contact member 76 that protrudes into the cylindrical space 27 at an angular interval of 90 ° around the center line 17 and faces the side surface of the sealing member 15 on the spout 2 side. The four abutting members 76 cooperate to exert a function like a cap nut to hold the sealing member 15 and prevent relative rotation around the center line 17 between the sealing member 15 and the cap 3.
The dimensional relationship between the sealing member 15 and the abutting portion 75 when the sealing member 15 is accommodated in the abutting portion 75, and among them, the left and right locking wings 72 corresponding to the longitudinal dimension of the sealing member 15. The dimensional relationship between the total length of the contact portion 75 and the inner surface of the contact portion 75 is particularly important for efficiently transmitting the rotational torque for twisting from the contact portion 75 to the sealing member 15.

That is, as shown in FIG. 23, when the size d4 of the gap between the tip surface 82 of the locking wing 72 and the inner surface 78 of the contact portion 75 is too large, the thickness of the thin portion 16 is too small. Since there is no member that restrains the deformation of 16, the thin portion is deformed and the sealing member 15 is inclined as shown in FIG. 24. As a result, the sealing member 15 and the contact member 76 are correctly As a result, the rotational torque is not correctly transmitted from the contact member 76 to the sealing member 15, and the thin wall portion 16 is not smoothly twisted, and the sealing member 15 is held by the locking rod 73. Are prone to uncertainty.

Therefore, in the present invention, as shown in FIG. 25, the diameter of the inner surface of the contact portion 75 is reduced, or the dimension between the front end surfaces 82 of the locking blades 72 is increased, so The gap d4 with the inner surface 78 of 75 is made small, preferably 0.3 mm.

In this way, as shown in FIG. 27, the inner surface 78 of the abutting portion 75 abuts against the locking wing 72 and restrains its posture, and the sealing member 15 is correctly opposed to the abutting member 76. , The rotational torque is correctly transmitted from the contact member 76 to the sealing member 15, and the thin-walled portion 16 can be reliably screwed off, and the sealing member 15 can be reliably held by the locking rod 73. Become.
Moreover, since the draining hole 83 and the draining groove 84 are formed in the cap 3, the drain plug after retorting the spout-cap assembly 1 is improved.

In the spout-cap assembly 1, when the container manufacturing machine attaches the cap 3 to the spout 2, the abutment protrusion 52 of the spout 2 is detected and an appropriate direction with respect to the cap 3, for example, the double-sided protrusion 51. The central angular position between the sliding surfaces 54 (FIGS. 20 and 21) or the symmetry line of the cross-section of the cap 3 (FIG. 22) (the direction extending to an angle of 90 ° with the one-dot chain line in the vertical direction in the figure). If the contact protrusion 52 is mounted so as to fit, the sealing member 15 of the spout 2 can be plugged into the sealing member holding portion 74 of the cap 3 so as to be correctly inserted.

On the other hand, when the operator opens the spout 2 and tries to pour the content liquid from the container 4, the cap 3 is rotated around the center line 17, and the contact protrusion 52 of the spout 2 slides on the double-side protrusion 51. If the change in resistance caused by rising the moving surface 54 and the generation of a clicking sound caused by dropping the stopper surface 55 are confirmed, the thin portion 16 supporting the sealing member 15 is completely twisted, and the spout 2 Is opened, and it is possible to know that the rotation angle range suitable for removing the cap 3 is reached.

The operation of the spout-cap assembly 1 configured as described above is as follows.
The container manufacturing machine detects the contact protrusion 52 of the spout 2 and the double-sided protrusion 51 of the cap 3 so that the contact protrusion 52 is positioned at the center between the sliding surfaces 54 of the double-sided protrusion 51. If the cap 3 is plugged into the spout 2 in the direction of the center line 17, the sealing member 15 of the spout 2 correctly enters the sealing member holding portion 74 of the cap 3, and the sealing member 15 makes contact with each side surface 76. And is supported and held by the locking rod 73. At this time, the cap-side locking piece 62 of the cap 3 is locked to the spout-side locking piece 61 of the spout 2 with the respective undercuts 64 and 63. Thus, the spout-cap assembly 1 is completed.

Next, when opening the spout-cap assembly 1, when the cap 3 is rotated around the center line 17 with respect to the spout 2, the cap 3 moves to the two side surfaces 85 a to 85 d of the respective side surfaces 85 a to 85 d And 85c, or 85b and 85d (see FIG. 26)) are pushed in the tangential direction of the circle when the cap 3 is viewed from above, so that the sealing member 15 is rotated around the center line 17 and twisted at the thin portion 16 Then, the liquid passage 11 is opened.

The operator can cap 3 by increasing the frictional resistance feeling due to the abutment protrusion 52 of the spout 2 rising on the sliding surface 54 of the double-sided protrusion 51, disappearing the frictional resistance feeling by dropping the stopper surface 55, and generating a click sound. It is detected that a state suitable for pulling out the cap 3 is reached, and the cap 3 can be pulled out from the opened spout 2 and detached. Further, the stopper surface 55 can prevent over-rotation, and the operator can sense that the cap 3 is in a position where it can be pulled out. At this time, the sealing member 15 of the spout-cap assembly 1 is twisted and held in the sealing member holding portion 74 of the cap 3.
As described above, according to the present invention, in the spout-cap assembly in which the sealing member of the liquid passage of the spout is twisted and opened by the cap, the spout and cap can be easily aligned at the time of capping, and the sealing is performed. The stop member can be fitted into the space of the cap in a correct posture, and the operator can be surely sensed that the threading of the sealing member has been completed, thereby preventing the operator from malfunctioning. In addition, it is possible to obtain a threading and unsealing mechanism for the spout-cap assembly that can be securely held in the cap without dropping the sealed sealing member.

Front view of spout-cap assembly Spout-cap assembly side view Top view of spout-cap assembly Bottom view of spout-cap assembly AA sectional view in FIG. CC sectional view in FIG. Front view of spout Spout side view Top view of spout Spout bottom view CC sectional view in FIG. AA sectional view in FIG. Front view of cap Cap side view Top view of cap Bottom view of cap AA sectional view in FIG. BB sectional view in FIG. C-O-D cross-sectional view in FIG. Cross-sectional explanatory diagram of the twist-open display mechanism Cross-sectional explanatory drawing of another twist-open display mechanism Cross-sectional explanatory drawing of another twist-open display mechanism Longitudinal section of spout-cap assembly Longitudinal sectional view showing a state in which the sealing member is greatly inclined Longitudinal section of another spout-cap assembly AA sectional view in FIG. Longitudinal sectional view showing a state in which the sealing member is slightly inclined

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spout-cap assembly 2 Spout 3 Cap 4 Container 5 Outlet part 6 Container attaching part 7 Trunk part 8 Outer part 11 Liquid path 12 Base end part 13 Liquid path 14 Non-slip step part 15 Sealing member 16 Thin part 17 Center line 25 Cylindrical wall 27 Cylindrical cavity 28 Top plate 29 Lower end 30 Guard collar 31 Small diameter portion 32 Large diameter portion 33 Shoulder portion 41 Twist cut opening display mechanism 42 Locking mechanism 43 Sealing member holding mechanism 51 Double-sided protrusion 52 Contact projection 53 Virtual circle 54 Sliding surface 55 Stopper surface 56 Reinforcement collar 57 Upper side 61 Spout side locking piece 62 Cap side locking piece 63 Spout side undercut 64 Cap side undercut 71 Center portion 72 Locking blade 73 Engagement Stopper 74 Sealing member holding portion 75 Abutting portion 76 Abutting member 77 Holding rod 78 Inner surface 82 Front end surface 83 Drain hole 84 Drain groove 5 a side of a~d sealing member

Claims (7)

A spout attached to the spout of the container and a cap that is detachably attached to the spout, and a sealing member that closes the liquid passage of the spout is twisted by rotation about a rotation center line of the cap A screw opening mechanism for cutting and opening,
The spout has the liquid passage communicating with the inside of the container at a base end in a cylindrical body, and a tip of the liquid passage is connected to the body of the spout so as to be able to be twisted. Including the sealing member that seals, and a twist-open opening display mechanism that represents a position where the sealing member is completely twisted,
The cap has a cylindrical wall that forms a cylindrical space in which a lower end portion capable of concentrically inserting at least an upper portion of the trunk portion of the spout is open,
The twist open display mechanism includes a double-sided protrusion disposed along a virtual circle that goes around the rotation center line and a contact protrusion that is relatively movable along the virtual circle, and the double-sided protrusion One of the contact protrusions is fixed to the spout and the other protrusion is fixed to the cap. The double-sided protrusion has a gently inclined sliding surface and a steeply inclined stopper having substantially the same protruding height in the radial direction. And the contact projections can contact the sliding surface and the stopper surface, and the spout is positioned at a position where the contact projection passes through the sliding surface in the rotation direction. The relative rotation position with respect to the cap is configured to be in a disengagement-permitted position that exceeds the threading completion position where the threading of the sealing member is completed and allows the cap to be detached,
A rotation transmitting portion capable of transmitting relative rotation around the center line of the cap to the sealing member by contacting the sealing member of the spout at an upper portion of the cylindrical void; And a sealing member holding structure capable of receiving and holding the sealing member of the spout at an upper portion of the place.   Two or more double-sided protrusions are provided, and at least one of the contact protrusions is disposed between the opposed sliding surfaces, and an angle around the center line between the contact protrusion and the sliding surface is The structure of the twisted-open portion of the container according to claim 1, wherein the structure is at least a rotation angle around the rotation center necessary for twisting and opening the sealing member.   Two or more double-sided protrusions are provided, and the angle around the center line between the opposed sliding surfaces is 2 of the rotation angle around the rotation center necessary for twisting and opening the sealing member. The structure of the twist-open opening part of the container according to claim 1, wherein the structure is twice or more.   The container according to any one of claims 1 to 3, wherein a rotation angle around the rotation center necessary for twisting and opening the sealing member is 45 to 130 degrees. The structure of the opening part.   A locking mechanism is provided between the spout and the cap to give resistance to the cap being pulled out. The locking mechanism extends outward from the spout in a direction perpendicular to the rotation center line. A spout-side locking piece and a cap-side locking piece extending inward from the cap in a direction perpendicular to the center line are provided in a predetermined angular range around the rotation center line, respectively, and the spout-side locking Both the piece and the cap-side locking piece have an undercut portion capable of interfering in the direction of the rotation center line at the tip, and when the spout and the cap are at a predetermined relative angular position, The spout and the cap are at a relative angular position that is out of the slip-out restraining position. 5. The container according to any one of claims 1 to 4, wherein the cap is allowed to come out when the undercut portions interfere with each other when in the protruding allowance position. The structure of the opening part.   6. A draining hole is formed through the cylindrical wall of the cap, and / or a draining groove having an open lower end is formed on the inner surface of the lower part of the cylindrical wall. The structure of the twist-open opening part of the container of any one.   The clearance between the contact surface of the rotation transmitting portion and the contact surface of the sealing member in the untwisted open state is 0.3 mm or less. The structure of the threaded opening portion of the container described.

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