JPH0710700B2 - Sealing structure of cap and container - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention rotates a thin metal cap fixed to the mouth of a container and tears the cap at a circumferentially continuous separating part connecting the upper and lower parts of the cap. The present invention relates to a pill fur proof type cap in which an upper part of a cap is separated from a lower part and can be attached to and detached from a container mouth part, and a container sealing structure.

[0002]

2. Description of the Related Art Conventionally, as a sealing structure for a pill fur-proof type cap and a container, those shown in FIGS. 14 to 16 are known. In this sealed structure, the mouth portion 101 of the container 100 has a screw portion 102 and a container 10 on the outer periphery from the upper end side.
A step portion 104 protruding from the outer periphery of 0 is provided. The cap 200 includes a circular top plate portion 201 and the top plate portion 201.
It is composed of a cylindrical side body portion 202 that hangs down from the peripheral edge and a packing 208 arranged on the back surface of the top plate portion 201. The side body portion 202 has a packing fixing groove 203 protruding inward at its upper end side. Further, a fragile separating portion 204, which has cuts 205 and bridges 206 alternately formed, is further provided in the circumferential direction therebelow.

In this hermetically sealed structure, the cap 200 is attached to the container mouth 101, and the packing 208 is pressed against the upper end surface of the container 100, and the screw portion 1 of the container mouth 101 is held.
The roller (not shown) of the winding machine is pressed against the portion facing the No. 02 and the portion facing immediately below the step 104, and the screw thread 1
A groove 207 that engages 03 and a groove 209 that engages the lower edge of the step 104 are formed to seal the container mouth 101.

A cap 20 fixed to the container mouth 101
0, when it is rotated counterclockwise, the connecting portion 20
The bridge 206 of 4 is torn up and down, and the connecting portion 204
The lower cap lower part 211 remains in the container 100, and only the cap upper part 210 above it is removable from the container mouth 101.

[0005]

However, in the above-mentioned sealed structure, even if the lower portion 211 of the cap is removed in order to collect and reuse the container 100, the groove 209 engages with the lower edge of the step portion 104. Therefore, there is a problem that it cannot be easily removed. That is, the cap 2
Since 00 is generally formed of aluminum, it cannot be easily torn with a finger, and there is a risk of injury if it is forcibly torn with a finger. In addition, the gap between the cap 200 and the container 100 is narrow, and the tip of pliers or the like does not depend on the back surface of the cap, and there is a risk of damaging the bottle if it is forced. Furthermore, even if a vertical perforation is inserted in the lower cap portion 211 and tears are made along this perforation line, if the length of the lower cap portion 211 is long, the split line may disengage from the perforation or bend, and I couldn't tear it up cleanly.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. In the cap and container sealing structure according to the present invention, the cap includes a circular top plate portion and this top plate. A side body portion that hangs down from the peripheral portion of the portion, and a packing that is provided on the back surface of the top plate portion, and the side body portion has a separation portion that is continuous in the circumferential direction, and a screw formation that is located above this separation portion. A portion and at least one convex portion located below the separating portion and projecting inward, the container mouth portion,
It has a screw portion and a convex step portion located below the screw portion, and when the step portion rotates the unseparated cap fixed to the container mouth in the opening direction, the convex portion engages with the cap portion. While preventing rotation and ascent, the protruding portion is provided with a guide portion that can be pulled out above the step portion by rotating the separated cap lower portion in the cap closing direction, and mounting the cap on the container mouth portion, The thread forming portion is deformed along the thread portion, and the convex portion is located on the lower end side of the guide portion.

[0007]

According to the above-mentioned sealing structure, when the cap is grasped and a force in the counterclockwise direction is applied, the cap attempts to move upward along the threaded portion, but the convex portion of the lower portion of the cap abuts the guide portion. Since the rotation is regulated, the vertical pulling force acts on the separating part that connects the upper and lower caps, and the upper cap can be separated from the lower cap and removed from the container mouth. . When the lower part of the cap is rotated clockwise while lifting it, the convex part is guided by the guide part and escapes above the step part to come off from the container mouth part.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cap and container sealing structure according to the present invention will be described below with reference to the accompanying drawings. I. First Embodiment FIGS. 1, 2 and 3 show a first embodiment. In the first embodiment, the mouth portion 2 of the container 1 is formed with a screw portion 3 in which a screw thread 4 is spirally arranged on the upper end side thereof. A step portion 5 is formed below the screw portion 3, and the step portion 5 includes an upper step portion 6 extending in the circumferential direction, a lower step portion 7, a circumferential groove 8 located therebetween, and an upper step portion. 6 diagonal grooves 9 provided at equal intervals
The diagonal groove 9 inclines the upper step 6 from the upper end to the lower end in the direction opposite to the thread 4.

The cap 11 has a circular top plate portion 12 and a cylindrical side body portion 13 that hangs down from the peripheral edge of the top plate portion 12.
And a packing 15 disposed on the back surface of the top plate portion 12, the side body portion 13 has a packing fixing groove 14 projecting inward at the upper end side thereof, and below the fixing groove 14 is a predetermined width. A fragile separating portion 17 in which cuts 18 and bridges 19 are alternately formed is provided in the circumferential direction with a straight portion (screw forming portion) 16 of the above. Further, there is a bulging portion 20 that projects outward under the separating portion 17, and a plurality of convex portions 21 that project inward are provided at approximately equal intervals in the circumferential direction in a substantially middle stage of the bulging portion 20. is there.

The cap 11 is attached to the container mouth portion 2, and the packing 15 is pressed against the upper end surface of the container 1, and the roller R1 of the winding machine is pressed around the straight portion 16 to fix the straight portion 16 to the container. 1 along with the threaded portion 4 to form the spiral groove 22 and the convex portion 21.
The roller R2 of the winding machine is pressed against the periphery of the bulging portion 20 excluding the region Y including the, the convex portion 21 is positioned in the circumferential groove 8 of the container 1, and the container mouth portion 2 is sealed.

When the cap 11 fixed to the container mouth 2 in this manner is gripped and slightly rotated in the counterclockwise direction, the thread groove 22 moves up along the screw thread 4 and rises to project. The part 21 engages with the upper step 6 at the lower vicinity 10 of the oblique groove 9 or engages with the lower surface of the upper step 6,
The rotation of the cap 11 is restricted. Therefore, if a force is further applied from this state to rotate the cap 11, the bridge 19 of the separating portion 17 is torn up and down, and the separating portion 17
The upper part (cap upper part) 23 can be separated from the lower part (cap lower part) 24 and detached from the container mouth part 2, and thereafter the cap upper part 23 functions as a detachable cap for the container mouth part 2. To do. On the other hand, the lower part of the cap 2
No. 4 remains in the container 1 because the convex portion 21 is restricted from rotating by the upper step portion 6.

When the cap lower part 24 is removed from the container mouth part 2, when the cap upper part 23 is removed and the cap lower part 24 is rotated in the clockwise direction while being lifted, the convex part 21 is guided to the oblique groove 9. And escapes above the upper step 6 and crosses the thread 4 to come off the container 1.

Although a plurality of diagonal grooves 9 are provided in the container 1, they may be provided in one. In this case, the cap 11
There is also one convex portion 21. When a plurality of the diagonal grooves 9 are provided at equal intervals, the cap convex portions 21 may be the same number as the grooves 9 or may be a number obtained by dividing the number of the grooves 9 by an integer.
For example, if the number of the grooves 9 is 6, the convex portions 21 are 1, 2, 3,
The number is 6.

II. Second Embodiment A second embodiment is shown in FIGS. 4 to 7. In this embodiment, the thread portion 34 of the container mouth portion 32 is provided with a thread 34 at a position symmetrical with respect to 180 ° by notching from the up and down direction and the upper guide portion G.
1 is provided. 180 on the step 35 below the screw 32
° Notched the symmetrical position in the vertical direction and cut out the middle guide G2
Is provided, and the position of the middle guide portion G2 is deviated from the upper guide portion G1 by a predetermined angle in the counterclockwise direction. Further, at the lower edge of the step portion 35, a stopper 36 is formed on the left side of the lower end outlet of the middle stage guide portion G2, and another stopper 37 is formed at a position moved to the right side from the lower end outlet of the middle stage guide portion G2 by a predetermined distance. A lower step guide portion G3 is formed along the lower edge of the step portion 35 between the stoppers 36 and 37.

In the cap 40, the cap lower portion 51 has one
Inwardly projecting projections 49, 49 are provided at 80 ° symmetrical positions, and the inner surface facing distance D1 of these projections 49, 49 is narrower than the thread outer diameter D2 and the step outer diameter D3 of the container 1. ,
It is slightly wider than the outer diameters D4, D5, D6 of the guide portions G1, G2, G3. Reference numeral 41 is a top plate portion, 42 is a side trunk portion, 43 is a packing fixing groove, 44 is packing, 45 is a straight portion, 46 is a separating portion, 47 is a cut portion, 48 is a bridge, and 51 is a cap lower portion.

When the cap 40 is attached to the container mouth portion 32, first, the cap 40 is put on the container mouth portion 32 and rotated in the counterclockwise direction. As a result, the convex portion 49 falls into the upper guide portion G1 and contacts the upper end of the step portion 35. Next, when the cap 40 is rotated counterclockwise, the protrusion 4
When 9 falls into the middle guide portion G2 and the packing 44 abuts on the upper end of the container 31, the convex portion 49 causes the lower guide portion G3.
Located in. Then, when the cap 40 is further rotated counterclockwise, the convex portion 49 moves along the lower guide portion G3 and abuts on the stopper 37 to prevent the rotation.
Then, in this state, a predetermined load is applied to the top plate portion 41 of the cap 40 to press the packing 44 against the upper end of the container, and the roller of the winder is pressed against the straight portion 45 to screw the screw portion 3
The container mouth portion 32 is sealed by forming the thread groove 52 along the line 3.

When the cap 40 is removed, when it is rotated counterclockwise, the thread groove 52 rises along the thread 33. On the other hand, the lower portion 52 of the cap is kept in a non-rotatable state because the convex portion 49 is restricted by the stopper 37. Therefore, the bridge 48 of the connecting portion 46 is torn, the cap upper portion 50 is disengaged from the container 31 along the threaded portion, and functions as a detachable cap thereafter.

When the cap lower portion 51 is removed, it is rotated in the direction opposite to that when the cap is attached, that is, in the clockwise direction. As a result, the convex portion 49 moves clockwise along the lower guide portion G3 and comes into contact with the stopper 36. Next, when the cap lower portion 51 is lifted from this position, the convex portion 49 moves along the middle stage guide portion G2, and comes into contact with the screw thread 34 when the guide portion G2 exits. Subsequently, when the cap lower portion 51 is rotated clockwise, the convex portion 49 enters the upper guide portion G1, and when the cap lower portion 51 is lifted from this state, the convex portion 49 comes out of the guide portion G1, and the cap lower portion 51 Comes out of the container 1.

The upper guide portion G1 and the middle guide portion G
In Fig. 8, the predetermined angle position is shifted in the circumferential direction.
As shown in, the guide portions G1 and G2 may be provided at the same position in the circumferential direction on the same straight line. Further, two sets of guide parts G1, G2, G3 are provided, but the number is not limited to this. However, the upper guide part G
When the positions of 1 and the middle guide portion G2 are different, the middle guide portion G2 and the upwardly moving convex portion 49 always come into contact with the screw thread 34. Therefore, even if the cap lower portion 51 is lifted and the container 31 is lifted, There is an advantage that it does not come off suddenly and there is no risk of damaging the container 31.

A third embodiment is shown in FIGS. 9 to 13. In this embodiment, unlike the second embodiment, the mouth portion 62 of the container 61 has no guide portion on the thread 64, and the guide portion G2 of the step portion 65 is provided.
Only the guide portion G3 is formed along the bottom of the stepped portion 65. Others are almost the same as the container of the second embodiment.
Incidentally, 64 is a screw thread, and 66 and 67 are stoppers.

The cap 70 has projections 82, 82 separately projecting inward at the bottom of the cap 40. The inner surface facing distance between the convex portions 79, 79 and the convex portions 82, 82 is the facing distance between the guide portions G2, G3 and the thread 64.
Is slightly larger than the outer diameter of the stepped portion 65 and smaller than the outer diameter of the stepped portion 65. Further, the convex portions 82, 82 are the upper convex portions 7
The position is shifted from 9, 79 in the circumferential direction. The cap 70 is sealed in the container 61 in the same manner as in the second embodiment, the cap upper portion 80 functions as a detachable cap that is separated from the cap lower portion 81, and the cap lower portion 81 remaining in the container mouth portion 62 is , The convex portions 79 and 82 to the guide portion G
It can be easily removed from the container mouth portion 62 by rotating clockwise and lifting while moving it along 2, G3.

The cap 70 of this embodiment has a convex portion 8
2 and 82 are provided, the cap 7 is attached in the cap alignment step before the cap is attached to the container opening 62.
This has the effect of preventing the upper end of another cap 70 from entering the lower end of 0. Further, as shown in FIG. 12, by shifting the positions of the convex portion 82 and the convex portion 79 in the circumferential direction, even when the container 61 is lifted by holding the lower cap portion 81, the lower cap portion 81 suddenly slips out and the container 61 is damaged. Therefore, there is an effect that the container 61 can be carried safely.

[0023]

As is apparent from the above description, in the container-cap sealing structure according to the present invention, the lower portion of the cap below the separating portion can be easily and manually operated without using tools such as pliers or nippers. It can be removed from the container. In addition, it is safe without being injured during removal. further,
Since the container is not damaged, the efficiency of container recycling is improved.

[Brief description of drawings]

FIG. 1 is a front view of a container mouth portion of a first embodiment.

FIG. 2 is a partially cutaway front view of the cap of the first embodiment.

FIG. 3 is a partially cutaway front view showing a cap mounted state of the first embodiment.

FIG. 4 is a plan view of a bottle mouth according to a second embodiment.

FIG. 5 is a front view of the container mouth of the second embodiment.

FIG. 6 is a partially cutaway front view of the cap of the second embodiment.

FIG. 7 is a partially cutaway front view showing a cap mounted state of a second embodiment.

FIG. 8 is a front view of a container mouth portion showing a modified example of the second embodiment.

FIG. 9 is a front view of the container mouth of the third embodiment.

FIG. 10 is a plan view of the container mouth of the third embodiment.

FIG. 11 is a partially cutaway front view of the cap of the third embodiment.

FIG. 12 is a sectional view taken along line AA of the cap of the third embodiment.

FIG. 13 is a partially cutaway front view showing a cap mounted state of a third embodiment.

FIG. 14 is a front view of a conventional container mouth portion.

FIG. 15 is a front view of a conventional cap with a half cutaway.

FIG. 16 is a front view of a half cutaway showing a conventional cap mounted state.

[Explanation of symbols]

1 ... Container 2 ... Mouth 3 ...
Screw 5 ... Step 6 ... Upper Step 7 ...
Lower step 8 ... Circumferential guide 9 ... Diagonal guide 11
… Cap 12… Top plate part 13… Side trunk part 15
… Packing 16… Straight part (screw forming part) 17
… Separation part 18… Cut part 19… Bridge 21
… Projection 23… Cap top 24… Cap bottom

Claims (1)

[Claims] 1. A thin metal cap is fixed to a container opening having a threaded portion, and the cap is separated into upper and lower parts by a fragile separating portion by rotating the cap, and an upper part of the cap can be attached to and detached from the container opening. In the sealed structure of the cap and the container, the cap has a circular top plate portion,
It has a side body portion hanging from the peripheral portion of the top plate portion, and a packing provided on the back surface of the top plate portion, the side body portion is a weak continuous separation portion in the circumferential direction, and an upper portion of this separation portion. A screw forming part located and a lower part of the separating part, which comprises at least one convex part projecting inward, the container mouth part includes a screw part and a convex step part located below the screw part. When the unseparated cap fixed to the container mouth is rotated in the opening direction, the stepped portion engages with the convex portion to prevent the cap from rotating and rising, while the separated cap lower portion is provided. The convex portion is provided with a guide portion that can be released above the step portion by rotating in the cap closing direction, the cap is attached to the container mouth portion, the screw forming portion is deformed along the screw portion, and the convex portion is formed. Part is located at the lower end side of the guide part. Sealed structure of the container with.