JP5881323B2 - Screw cap - Google Patents

Description

  The present invention relates to a cap, particularly a screw cap.

  As a cap, a plurality of thin connection pieces are interposed at the lower end of the cap body, which is screwed to the outer periphery of the mouth tube portion of the container body and is fitted with a packing member that engages the mouth tube portion inward and seals the inside of the container. Connecting a sealing ring that is locked so as not to be pulled out to the locking portion on the outer periphery of the mouth tube portion, breaking the connection piece by a cap screwing operation at the time of opening the lid, and a sealing ring remaining at the lower portion of the mouth tube portion, A screw cap is widely used that prevents unauthorized opening that is separated from a cap body that is to be opened so that it can be determined that the cap has been opened (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-20845

However, in the cap with seal described in Patent Document 1, the outer periphery of the engagement wall (sealing wall 42) of the packing member (inner plug 6) is in close contact with the inner periphery of the mouth tube portion of the container body when the lid is closed. When the lid is opened, there is a problem in that a force that pulls the packing member away from the mouth tube portion is added to the force that rotates the cap in the opening direction, and a strong force is required to rotate the cap.
Furthermore, when a force for separating the sealing band (tamper evidence skirt 16) from the cap body (lid body 4) is applied, a stronger force is required to rotate the cap.

  An object of the present invention is to solve the above-mentioned problem, and the inside of a container can be sealed by a packing member when the lid is closed, and when the lid is opened, the cap is rotated in the opening direction and the packing member is pulled out from the mouth tube portion. At the same time, it is an object to provide a screw cap capable of separating a sealing band from a cap body with a weaker rotational force.

In order to solve the above-mentioned problems, the present invention provides a screw cap that is screwed to a mouth tube portion of a container body as a screw cap and is provided with a packing member that seals the mouth tube portion inward. on the inner periphery of the central portion, Rutotomoni disposed screw to be screwed into the threaded mouth tube portion of the container body, until the top wall of the upper end of the screw has a movable inner peripheral surface, the packing member Molded with a deformable soft material, ring-shaped flange, an engagement wall that is suspended from the inner edge of the flange, the outer periphery is loosely inserted into the inner periphery of the mouth tube portion, and the lower end inner periphery of the engagement wall A ring-shaped bottom wall that is continuously provided, an inclined cylindrical wall that is erected on the inner edge of the bottom wall, extends upward, and is connected to the upper end of the inclined cylindrical wall. It consists of a top wall that is arranged to be higher, and the flange is Surface engages the upper surface and the engagement of the mouth tube portion of the container body, the outer end, when attached to the cap, to adopt a configuration, characterized in that contacts the upper end surface of the screw cap.

  As an embodiment of the cap, on the outer periphery of the mouth tube portion of the container main body, a screw is screwed on the upper portion, and an engagement recess is formed in which a locking step portion is formed from the middle to the inside. Is composed of a cap body and a sealing band continuously provided at the lower end of the cap body so as to be ruptured. The sealing band is formed by connecting a band having a predetermined interval and a circular shape, and both ends of the band. It is formed in a ring shape by a breakable weakened part to be installed, and the outer peripheral wall and sealing band of the cap body are connected to the lower surface of the outer peripheral wall and the upper surface of the band body from the end in the opening direction when the band body is opened. A plurality of breakable weakening pieces arranged at equal intervals are connected, and the inner periphery of the band of the sealing band is arranged at equal intervals from the end in the opening direction at the time of opening, and from above downward A configuration in which a locking claw piece extending inwardly and having a tip engaged with an engagement recess of the container body is provided. Adopted to.

  As an example of the sealing band, the weakened piece near the end opposite to the opening direction of the band is a thickened and relatively strong weakened piece than the other weakened pieces, or The locking claw piece engages with the engagement concave portion of the mouth tube portion of the container body when the lid is closed, and comes into contact with the locking step portion of the mouth tube portion after the cap is raised to some extent when the lid is opened. A configuration characterized by being formed is adopted.

In the screw cap of the present invention, the packing member is deformed by the lowering of the cap body when the lid is closed, thereby bringing the engagement wall of the packing member into close contact with the inner periphery of the mouth tube portion of the container body, It can be sealed, and the cap body is lifted when the lid is opened, so that the deformation of the packing member is released, so that the engagement wall of the packing member and the inner periphery of the mouth tube part are released, and the packing without resistance. The member can be pulled away from the mouth tube portion.
At the time of opening, there is no resistance between the packing member and the mouth tube portion, and since the cap at the time of opening is not added to the force for rotating the cap in the opening direction, it can be rotated with a weaker force.
Further, since there is no resistance between the packing member and the mouth tube portion, even when the sealing band at the time of opening the lid is separated from the cap body, it can be continuously rotated with a weaker force.

Furthermore, since the trace remains when the weakening piece which connects the cap main body and sealing band of a cap is cut | disconnected, it can be confirmed that the cap is tampered with.
In addition, the sealing band remaining in the mouth tube portion when the lid is opened is a band body obtained by cutting the weakened portion, and can be easily removed from the mouth tube portion.

It is explanatory drawing of the container of this invention, (a) is a cross-sectional side view, (b) is a front view. It is explanatory drawing of a cap, (a) is a cross-sectional side view, (b) is a top view of the sealing strip cut | disconnected by the XX line of (a). It is explanatory drawing of a packing member, (a) is a top view, (b) is sectional drawing. It is a cross-sectional side view when a packing member is mounted on the cap. It is explanatory drawing at the time of the descent | fall of a cap and a packing member with respect to a container main body, (a) is a cross-sectional side view, (b) is sectional drawing when pressing the top wall of a packing member. It is sectional drawing of the container after opening.

Next, the screw cap of this invention is demonstrated with reference to drawings.
In FIG. 1, A is a container body, B is a cap that is screwed into the mouth tube portion of the container body A, P is a packing member that is molded of a deformable soft material and seals the container body A together with the cap B.

  The container body A includes a mouth tube portion 1, a shoulder portion 2, and a trunk portion (not shown).

  On the outer periphery of the mouth tube portion 1, a screw 3 is screwed on the upper portion, a locking step portion 4 is formed inward from the middle, and the engaging recess is reduced in diameter from the other outer periphery downward. 5 and a neck ring 6 that is expanded outward from the other outer periphery from the lower end of the engaging recess 5 to the outside.

  As shown in FIGS. 1 and 2, the cap B is composed of a cap body B1 and a sealing band B2 provided continuously to the lower end of the cap body B1.

The cap body B <b> 1 includes a top wall 10 and an outer peripheral wall 11.
A plurality of knurls or the like may be provided on the outer periphery of the outer peripheral wall 11 to prevent slippage.

  On the inner periphery of the outer peripheral wall 11, a screw 12 that is screwed into the screw 3 of the mouth tube portion 1 of the container main body A is provided at the center, and the upper end of the screw 12 to the top wall 10 is movable. It is the peripheral surface 11a.

The sealing band B2 includes a band 14 formed in a circular shape with a predetermined interval 13 and a breakable weakening portion 15 that continuously connects an inner lower end of a side surface of the interval 13 between the end portions 14a and 14b of the band 14. It is formed in a ring shape.
The end portion 14a of the band 14 is on the opposite side to the opening direction with the interval 13 in between, and the end portion 14b is in the opening direction.

  The outer peripheral wall 11 and the sealing band B2 of the cap main body B1 are provided with a plurality of equidistant weakenings, the lower surface of the outer peripheral wall 11 and the upper surface of the band body 14, leaving the vicinity of the end portion 14a. The piece 16 is disposed in the vicinity of the end 14a of the band 14 of the sealing band B2, and is connected by a thickened weakened piece 17 that is thicker than the weakened piece 16.

On the inner periphery of the band 14 of the sealing band B2, a plurality of locking claw pieces 18 are provided at equal intervals extending from the lower side with the tip inclined upward inward.
The locking claw piece 18 enters the engagement recess 5 of the mouth tube portion 1 of the container main body A when the lid is closed, and after the cap B rotates to some extent when the lid is opened, the tip engages with the mouth tube portion 1. It is formed so as to abut on the stepped portion 4.

  As shown in FIGS. 1 and 3, the packing member P is connected to the ring-shaped flange 20, the engagement wall 21 suspended from the inner edge of the flange 20, and the inner periphery of the lower end of the engagement wall 21. A ring-shaped bottom wall 22, an inclined cylindrical wall 23 erected on the inner edge of the bottom wall 22, extending upward and inward, connected to the upper end of the inclined cylindrical wall 23, and the upper surface of the flange 20 The top wall 24 is arranged so as to be at a position of a height h that is somewhat higher than the upper surface.

  The flange 20 is movable within the movable inner peripheral surface 11a of the outer peripheral wall 11 of the cap body B1 when the lower surface engages with the upper surface of the mouth tube portion 1 of the container body A and the outer edge 20a is attached to the cap body B1. While freely fitting, it abuts against the upper end surface of the screw 12 to prevent the packing member P from falling off the cap body B1.

  An engaging portion 25 is provided around the outer periphery of the engaging wall 21, and the outer peripheral surface of the engaging portion 25 is formed to be inserted into the inner periphery of the mouth tube portion 1 of the container body A with a weak resistance. Yes.

Next, usage modes and operational effects of the present embodiment will be described.
First, the packing member P is inserted into the cap B from below with the top wall 24 facing upward, and the packing member P is mounted in the cap body B1.

  At this time, the vicinity of the outer edge 20a of the flange 20 of the packing member P is in contact with the lower end of the inner periphery of the screw 12 of the outer peripheral wall 11 of the cap body B1, but the packing member P itself is formed of a soft material that can be deformed to some extent. Therefore, the packing member P is raised while the flange 20 is deformed.

  When the packing member P is raised and the flange 20 gets over the screw 12 of the cap body B1, the contact is released, the flange 20 is restored to its original shape, and the packing member P is the movable inner peripheral surface of the outer peripheral wall 11. Enter 11a inward.

  Finally, the upper surface of the top wall 24 of the packing member P is brought into contact with the lower surface of the top wall 10 of the cap body B1, and the rise is stopped.

  After the packing member P is mounted in the cap body B1, the packing member P moves up and down inside the movable inner peripheral surface 11a of the cap body B1, and as shown in FIG. 4, in the vicinity of the outer edge 20a of the flange 20 Is in contact with the upper end of the screw 12 to prevent the packing member P from falling off from the inside of the cap body A.

  The cap B to which the packing member P is attached is rotated in the screwing direction, is attached to the mouth tube portion 1 of the container body A, and is closed.

  When the cap B is rotated and lowered with respect to the mouth tube portion 1 of the container main body A, the vicinity of the tip end portion of the locking claw piece 18 provided on the inner periphery of the band body 14 of the sealing band B2 is the mouth. Although it abuts on the outer periphery of the screw 3 of the tube portion 1 and the mouth tube portion 1, the locking claw piece 18 is deformed outward from the vicinity of the tip portion, so that it does not become resistance to rotation and lowering of the cap B.

  As the cap B descends, the top surface of the top wall 24 of the packing member P comes into contact with the bottom surface of the top wall 10 of the cap body B1, so that the packing member P also descends together with the cap body B1, and the engaging wall 21 of the packing member P Are inserted from the bottom wall 22 side into the inner periphery of the mouth tube portion 1 with weak resistance.

  When the cap B is further rotated and lowered, the tip of the locking claw piece 18 enters the engagement recess 5 of the mouth tube portion 1 of the container body A, and the contact with the mouth tube portion 1 is released. , It restores to its original state and descends as it is.

  When the screwing of the cap B is finished, as shown in FIG. 5A, the lower surface of the flange 20 of the packing member P comes into contact with the upper surface of the mouth tube portion 1 of the container body A, and the packing member P is lowered. While being blocked, the top wall 24 is pressed against the entire packing member P by the height h from the top as the cap body B1 is lowered.

  Since the packing member P itself is formed of a soft material that can be deformed to some extent, when only the top wall 24 is pressed from above, a downward force f1 is applied to the inclined cylindrical wall 23 as shown in FIG. The force f2 is outwardly downward via the bottom wall, and further, the force f3 is applied to expand the bottom wall 22 outwardly via the inclined cylindrical wall 23, and the engagement wall 21 is moved outwardly from below via the bottom wall 22. Let's transform.

  When the engagement wall 21 is deformed outward, the outer periphery of the engagement portion 25 of the engagement wall 21 is crimped to the inner periphery of the mouth tube portion 1 as shown in FIG. Go.

  When the screwing of the cap B is finished, the top surfaces of the top wall 24 and the flange 20 of the packing member P are flush with each other, and the flange 20 is connected to the bottom surface of the top wall 10 of the cap body B1 and the opening of the container body A. Since the upper surface of the tube portion 1 is closely attached, the packing member P is crimped to the inner periphery and the upper surface of the mouth tube portion 1 to seal the inside of the container.

When opening the cap B, the cap B is rotated relative to the container body A in the opening direction.
When the cap B is rotated and the cap B starts to rise, the narrowing force between the lower surface of the top wall 10 of the cap body B1 and the flange 20 of the packing member P is weakened.

  Further, as the top wall 10 of the cap body B1 rises, the force f1 due to the pressure on the top wall 24 of the packing member P from the upper side disappears, so that the outer downward force f2 and the outer force f3 disappear. As a result, the deformation of the engaging wall 21 of the packing member P is released and the original shape is restored.

  By returning the engagement wall 21 to its original shape, the pressure bonding between the outer periphery of the engagement portion 25 of the engagement wall 21 and the inner periphery of the mouth tube portion 1 of the container main body A is released, and FIG. As shown, the engagement wall 21 is returned to a state where it is inserted into the inner periphery of the mouth tube portion 1 with a weak resistance.

  Further, when the cap B is raised, the tip of the locking claw piece 18 on the inner periphery of the band 14 of the sealing band B2 comes into contact with the locking step 4 of the mouth tube portion 1 of the container body A.

  When the cap B is rotated after the tip of the locking claw piece 18 comes into contact with the locking step portion 4, the sealing band B2 is prevented from rising relative to the cap body B1 rising.

  When the cap main body B1 rises in a state where the rise of the sealing band B2 is prevented, the weakening piece 16 connecting the cap main body B1 and the sealing band B2 is cut.

  Further, the vicinity of the end 14a of the band 14 of the sealing band B2 connected to the cap body B1 by the thickening piece 17 tends to rise, and due to the difference in height between the end 14a and the end 14b of the band 14 The weakened portion 15 connecting the end portion 14a and the end portion 14b of the band body 14 is cut, then the weakened piece 17 itself is cut by the resistance of the band body 14 itself, and the sealing band B2 is dropped downward. It is.

  When the cap body B1 is raised, the outer edge 20a of the flange 20 of the packing member P is brought into contact with the upper end of the screw 12 of the cap body B1, and the packing member P is also raised together with the cap body B1.

  Since the outer periphery of the engaging wall 21 of the packing member P is merely inserted into the inner periphery of the mouth tube portion 1 of the container main body A with a weak resistance, the packing member P is removed from the mouth tube portion 1 together with the cap body B1. It will be done.

  When the rotation of the cap main body B1 is continued, the cap main body B1 and the packing member P are opened from the container main body A, leaving the sealing band B2 in the mouth tube portion 1 of the container main body A, as shown in FIG.

  When the cap B is screwed onto the container main body A to close the cap B, the screw cap according to the present embodiment deforms the packing member P mounted in the cap main body B1 by lowering the cap main body B1, so that the packing member P can be pressure-bonded to the inner periphery of the mouth tube portion 1 of the container main body A, and the inside of the container can be further sealed.

  Since the inside of the container can be sealed by the packing member P, it is not necessary to seal the inside of the container by screwing the screw 3 of the mouth tube portion 1 of the container main body A and the screw 12 of the cap main body B1, and the screws between the screws are not required. A certain amount of space is left between the peaks and valleys to be joined, and screws that can be easily screwed in and out with a weak force may be used.

  When the lid is opened for the first time, the cap B is rotated in the opening direction and lifted, so that the deformation of the packing member P is released and the pressure bonding between the packing member P and the inner periphery of the mouth tube portion 1 is released. Since resistance is lost, it can be opened easily with weak force.

  Further, when the lid is opened, the packing member P and the mouth tube portion 1 are first unsealed, and then the locking claw piece 18 of the sealing band B2 is brought into contact with the locking step portion 4 of the mouth tube portion 1. Since the sealing band B2 is separated from the cap body B1, resistance at the time of opening does not occur at the same time, and the opening can be continuously advanced with a weak force.

  When the cap body B1 is closed again on the mouth tube portion 1 of the container body A, the cap wall B1 is rotated in the screwing direction so that the engagement wall 21 of the packing member P is moved to the inner periphery of the mouth tube portion 1. By inserting the packing member P with a weak resistance, the outer periphery of the engaging portion 25 of the engaging wall 21 is crimped to the inner periphery of the mouth tube portion 1, and the flange 20 is attached to the top wall of the cap body B1. The lower surface of 10 and the upper surface of the mouthpiece portion 1 of the container main body A can be tightly sealed to seal the inside of the container.

  In the screw cap of the present embodiment, the weakening piece 16 and the thickening piece 17 that connect the cap body B1 and the sealing band B2 of the cap B and the weakening part 15 of the sealing band B2 are cut at the first opening. Therefore, the tampering can be visually recognized.

  After the lid is opened, the sealing band B2 remains below the mouth tube portion 1 of the container main body A, but the sealing band B2 itself is cut off from the weakening portion 15 connecting the end portion 14a and the end portion 14b of the band body 14 together. If necessary, the end 14a or the end 14b of the band 14 may be picked and pulled, and the sealing band B2 may be pulled away from the mouth tube 1 and discarded.

  Further, since the sealing band B2 can be easily removed from the container main body A, the container main body A and the cap B, which are made of different materials, can be easily separated and discarded after the container is used.

  In the above-described embodiment, the cap is a cap body and a sealing band. However, if it is not necessary to prevent unauthorized opening, the cap may be configured with only the cap body without the sealing band.

  The screw cap of the present invention can be rotated with a weaker force to rotate the cap in the opening direction at the time of opening, and can easily separate the sealing band from the cap body. Can be widely used as a cap that can be easily disposed of.

A Container body B Cap B1 Cap body B2 Sealing band P Packing member h Height 1 Mouth part 2 Shoulder part 3 and 12 Screw 4 Locking step part 5 Engaging recess 6 Neck ring 10 Top wall 11 Outer wall 11a Movable inner circumference Surface 13 Interval 14 Bands 14a and 14b End 15 Weaker 16 Weakened 17 Thickened 18 Locking claw 20 Flange 20a Outer edge 21 Engagement wall 22 Bottom wall 23 Inclined cylindrical wall 24 Top wall 25 Engagement part

Claims (4)

In the screw cap that is screwed to the mouth tube portion of the container main body and is equipped with a packing member that seals the mouth tube portion inward,
The inner periphery of the outer peripheral wall of the cap, to the central portion, a screw which is screwed into the threaded mouth tube portion of the container body is disposed Rutotomoni, until the top wall of the upper end of the screw has a movable inner peripheral surface ,
The packing member is formed of a deformable soft material, and has a ring-shaped flange, an engagement wall that is suspended from the inner edge of the flange, and has an outer periphery loosely inserted into the inner periphery of the mouth tube portion, and a lower end of the engagement wall A ring-shaped bottom wall continuously provided on the inner periphery, an inclined cylindrical wall standing on the inner edge end of the bottom wall, extending toward the upper inner side, continuously provided on the upper end of the inclined cylindrical wall, and an upper surface, The top wall is arranged to be higher than the upper surface of the flange,
The screw cap, wherein the flange has a lower surface engaged with an upper surface of the mouth tube portion of the container main body, and an outer edge is in contact with an upper end surface of a screw of the cap when the cap is mounted on the cap. On the outer periphery of the mouth tube portion of the container main body, a screw is screwed on the upper portion, and an engagement concave portion that forms a locking step portion inward from the middle is disposed,
The cap is composed of a cap body and a sealing strip that is connected to the lower end of the cap body so as to be breakable.
The sealing band is formed in a ring shape by a band formed in a circular shape with a predetermined interval, and a breakable weakened portion continuously connecting both ends of the band,
The outer peripheral wall and sealing band of the cap body are made of a fragile piece that can be ruptured, and the lower surface of the outer peripheral wall and the upper surface of the band body are arranged at equal intervals from the end in the opening direction when the band body is opened Concatenated,
On the inner periphery of the band of the sealing band, a plurality are provided at equal intervals from the end in the opening direction at the time of opening, extend from the lower side to the upper side, and the tip is engaged with the engaging recess of the container body. The screw cap according to claim 1, wherein a locking claw piece is provided.   3. The screw cap according to claim 2, wherein the weakened piece in the vicinity of the end opposite to the opening direction of the band is a weakened piece that is thicker and relatively stronger than the other weakened pieces.   The locking claw piece engages with the engagement concave portion of the mouth tube portion of the container body when the lid is closed, and comes into contact with the locking step portion of the mouth tube portion after the cap is raised to some extent when the lid is opened. The screw cap according to claim 2 or 3, wherein the screw cap is formed.

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