JP2018184198A - Synthetic-resin-made cap, closing device and beverage-containing closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic-resin-made cap in which plug opening operation is easy and there is no feeling of an ache at a finger when a user grips and rotates the cap.SOLUTION: There is provided a synthetic-resin-made cap 1 which comprises a top plate part 2 and a tubular part 3 which is hung down from the periphery thereof. The outer peripheral surface of the tubular part 3 includes a first knurl region 13 and a second knurl region 14 at least a part of which is positioned at a lower position in the radial direction of the tubular part 3 in comparison with the first knurl region 13. At the first knurl region 13, one or plural first knurl convex parts 15 are formed, and, at the second knurl region 14, a second knurl convex part 16 is formed. The top part of at least a part of the second knurl convex part 16 is positioned at a lower position in the radial direction of the tubular part 3 in comparison with at least one top part among the first knurl convex parts 15.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a synthetic resin cap for closing a mouth portion of a container, a closing device using the cap, and a beverage containing closing device.

Conventionally, synthetic resin caps (hereinafter simply referred to as caps) have been widely used (see, for example, Patent Document 1).
FIG. 11 is a diagram illustrating an example of a conventional cap. The cap 31 shown here includes a top plate portion 2 and a cylindrical portion 3 that hangs down from the periphery thereof. The top plate portion 2 is formed with an inner seal protrusion 4 that fits into the mouth portion of the container and contacts the inner surface of the mouth portion, and an outer seal protrusion 5 that contacts the outer surface or the opening end surface of the mouth portion. The cylindrical portion 3 is divided into a main portion 8 by a score 6 (weakening portion) and a tamper evidence ring portion (TE ring portion) 9 connected to the main portion 8 by a bridge 7. On the inner peripheral surface of the main portion 8, a screw portion 10 that is screwed into the male screw of the container is formed. On the inner peripheral surface of the TE ring portion 9 is formed a locking projection 11 that is locked to the container at the time of opening to prevent the movement of the TE ring portion 9. On the outer peripheral surface of the main portion 8, a knurl portion 32 including a plurality of knurl projections 33 is formed. The knurl part 32 has a function of preventing slipping when the user grips and rotates the cap 31.

Japanese Patent Laid-Open No. 2002-21605

In the cap 31, depending on the shape, size, and the like of the knurled portion 33, there is a problem that when the user grips and rotates the cap 31, the cap 31 becomes slippery and difficult to open and close. In order to solve this problem, if the protrusion height of the knurl projection 33 is increased or the formation pitch is increased, the knurl projection 33 bites into the fingers when the user grips and rotates the cap 31. Caused pain in the fingers.
The present invention has been made in view of the above circumstances, a cap made of a synthetic resin, which is easy to open and close, and does not feel pain in fingers when a user grips and rotates the cap, a closing device, And it aims at providing a drink containing closure device.

One aspect of the present invention is a synthetic resin cap to be attached to a mouth portion of a container, comprising a top plate portion and a cylindrical portion hanging from the periphery thereof, and the outer peripheral surface of the cylindrical portion is a first knurled region. And a second knurl region at least a part of which is lower in the radial direction of the cylindrical portion than the first knurl region, and the first knurl region extends in the hanging direction. Alternatively, a plurality of first nar protrusions are formed, and one or a plurality of second nar protrusions extending in the hanging direction are formed in the second nar area, and at least one of the second nar protrusions. The top part of the part provides a synthetic resin cap located at a lower position in the radial direction of the cylindrical part than at least one top part of the first knurl projections.
It is preferable that the protrusion height of the first knurl protrusion is the same as the protrusion height of the second nar protrusion.
The projecting heights of the plurality of second nar protrusions in at least one second nar region are preferably the same.
It is preferable that the first knurl region and the second knurl region are formed at different positions in the circumferential direction of the cylindrical portion.

  One aspect of the present invention is a synthetic resin cap to be attached to a mouth portion of a container, comprising a top plate portion and a cylindrical portion hanging from the periphery thereof, and the outer peripheral surface of the cylindrical portion is a first knurled region. And a second knurl region, wherein the first knurl region is formed with one or a plurality of first knurl projections extending in the drooping direction, and the second knurl region is formed in the drooping direction. A plurality of extending second knurl projections are formed, and in at least one second knurl region, the plurality of second knurl projections have the same protrusion height, and the first knurl projections Provided is a synthetic resin cap having a protruding height lower than at least a part thereof.

  In one aspect of the present invention, the cylindrical portion is divided into a main portion and a tamper-evidence ring portion connected to the main portion by a bridge, and a male screw of the mouth portion is formed on an inner peripheral surface of the main portion. A screw part to be screwed is provided, and the tamper-evidence ring part has a plurality of locking projections which are locked to a locking step part of the mouth part when opening to prevent movement of the tamper-evidence ring part. It is preferable to be provided.

The present invention provides a closing device comprising a container filled with a beverage and a cap attached to the mouth portion thereof, wherein the cap has the above-described configuration.
The present invention provides a beverage containing closure device comprising a container filled with a beverage and a cap attached to the mouth portion of the beverage, wherein the cap has the above-described configuration.

According to one aspect of the present invention, since the top of the second knurl convex portion is at a lower position than the top of the first knurl convex portion, when the user grips the cap at the time of opening and closing, the second knurl convex portion The force applied to the fingers from the part can be reduced. Therefore, the pain of the finger by a knurl part can be relieved.
Since the 2nd knurl area in which the 2nd nar convex part was formed is in a position lower than the 1st knurl area, it can give sufficient height also to the 2nd knurl convex part. For this reason, the second knurled portion can also exert a high locking force. Therefore, the anti-slip performance is less likely to decrease due to the second knurl convex portion being at a low position.
Accordingly, the opening / closing operation is easy and the pain of the fingers when the user holds and rotates the cap can be reduced.

It is a front view which shows 1st Embodiment of the synthetic resin caps of this invention. It is sectional drawing which shows a part of synthetic resin cap shown in FIG. It is sectional drawing which shows a part of synthetic resin cap shown in FIG. 1, and is a figure which shows the I-I 'cross section in FIG. It is sectional drawing which shows a part of synthetic resin cap shown in FIG. 1, and is a figure which shows the II-II 'cross section in FIG. It is sectional drawing which shows the synthetic resin cap shown in FIG. 1 and the container with which this synthetic resin cap is mounted | worn. It is a front view which shows the modification of the synthetic resin caps shown in FIG. It is a front view which shows 2nd Embodiment of the synthetic resin caps of this invention. It is sectional drawing which shows a part of synthetic resin caps shown in FIG. It is sectional drawing which shows a part of synthetic resin cap shown in FIG. 7, and is a figure which shows the III-III 'cross section in FIG. It is sectional drawing which shows the modification of the synthetic resin caps shown in FIG. It is a partial cross section figure which shows an example of the conventional synthetic resin caps.

Hereinafter, an example of the synthetic resin cap according to the present invention will be described with reference to the drawings. The synthetic resin cap may be simply referred to as “cap”.
FIG. 1 is a front view showing a cap 1 which is a first embodiment of the cap of the present invention. FIG. 2 is a sectional view taken along the central axis C <b> 1 showing a part of the cap 1. FIG. 3 is a cross-sectional view showing a part of the cap 1 and a cross-sectional view taken along the line II ′ in FIG. 4 is a cross-sectional view showing a part of the cap 1 and a cross-sectional view taken along the line II-II ′ in FIG. FIG. 5 is a cross-sectional view showing the cap 1 and the container 20 to which the cap 1 is attached.
In the following description, “upper” and “lower” are determined according to the vertical direction in FIGS. 1 and 2. The vertical direction is a direction along the central axis C <b> 1 of the cap 1. The direction around the central axis C1 (circumferential direction of the cylindrical portion 3) may be referred to as “cap circumferential direction”.

As shown in FIGS. 2 and 5, the cap 1 includes a circular top plate portion 2 and a cylindrical portion 3 that hangs down from the periphery of the top plate portion 2 along a substantially central axis C1.
The top plate portion 2 is formed with an inner seal projection 4 that fits into the mouth portion 21 of the container 20 and contacts the inner surface 21a of the mouth portion 21, and an opening end seal projection 5 that contacts the opening end surface 21b.

  The cylindrical portion 3 is divided into a main portion 8 by a score 6 (weakening portion) and a tamper evidence ring portion (TE ring portion) 9 connected to the main portion 8 by a bridge 7. On the inner peripheral surface of the main portion 8, a screw portion 10 that is screwed into the male screw 22 of the container 20 is formed.

  On the inner peripheral surface of the TE ring portion 9, a locking projection 11 is formed which is locked to the locking step portion 23 of the container 20 when the stopper is opened and prevents the movement of the TE ring portion 9. The locking protrusion 11 is a plate that can be raised and lowered, and is formed to protrude radially inward from the inner peripheral surface of the TE ring portion 9.

As shown in FIG. 1, the outer peripheral surface of the main portion 8 has a plurality of first nar regions 13 and a plurality of second nar regions 14.
The first knurl area 13 is a part from the upper part to the lower part of the main part 8 in the circumferential direction of the cylindrical part 3, and has a substantially constant width in the vertical direction. The second knurl area 14 is a part from the upper part of the main part 8 to the lower part of the cylinder part 3 in the circumferential direction, and has a substantially constant width in the vertical direction.

The first knurl region 13 and the second knurl region 14 are formed at different positions in the circumferential direction of the cylindrical portion 3. Specifically, the first knurl areas 13 and the second knurl areas 14 are alternately arranged in the circumferential direction of the cylindrical portion 3.
In the cap 1, the first knurl areas 13 and the second knurl areas 14 are alternately arranged in the circumferential direction of the cylindrical portion 3, and the first knurl areas 13 and 13 are on both sides of the second knurl area 14. In the second nar area 14, the force applied by the second nar protrusion 16 to the user's finger can be reduced.

FIG. 2 is a view showing a cross section of the cap 1 in the first knurl region 13.
The first knurl region 13 is inclined with respect to the central axis C1 (see FIG. 1) so as to gradually increase its diameter gradually downward.
The second knurl area 14 has an inclination angle smaller than that in the first nar area 13. The second knurl region 14 is generally formed along the vertical direction, and the outer peripheral surface of the second knurl region 14 is generally a cylindrical surface having the central axis C1 as the central axis.

  As shown in FIGS. 3 and 4, since the second knurl region 14 has a small inclination, the outer diameter of the second knurl region 14 is smaller than the outer diameter of the first knurl region 15 in almost the entire region. Since the second knurl region 14 is almost entirely lower than the first knurl region 13 in the radial direction of the cylindrical portion 3 (position close to the central axis C1), the second knurl region 14 is the first knurl region 13. Are formed in a concave shape.

As shown in FIGS. 2, 3, and 4, the height difference in the radial direction of the cylindrical portion 3 between the first knurl region 13 and the second knurl region 14 increases toward the lower side.
As shown in FIG. 2, the maximum value of the depth D1 of the second nar region 14 relative to the first nar region 13 is preferably 0.05 mm or more (preferably 0.25 mm or more). By setting the depth D1 in the above range, it is possible to alleviate the pain of the fingers due to the knurled portion 12 (second knurled convex portion 16) when the user holds the cap 1 at the time of opening. The depth D1 can be set to 0.5 mm or less, for example. By setting the depth D1 in the above range, the locking force of the knurled portion 12 (second knurled convex portion 16) can be increased when the user opens the cap 1.

  As shown in FIG. 1, the width W1 of the first knurl region 13 (the width in the circumferential direction of the cylindrical portion 3) is preferably 2 mm to 20 mm (preferably 5 mm to 10 mm), for example. The width W1 may be 2.2 to 22% (preferably 5.5 to 11%) with respect to the entire circumference of the main portion 8. The total of the width W1 can be 20 to 80% (preferably 50 to 70%) with respect to the entire circumference of the main portion 8.

  If the width W1 is too narrow, the locking force of the knurled portion 12 (first knurled convex portion 15) when the user opens the cap 1 becomes low. If the width W1 is too wide, the width W2 of the second knurl region 14 is likely to be small, so that the effect of relieving the pain felt by the user's fingers at the time of opening is small. When the width W1 is in the above range, the finger can be securely locked to the knurled portion 12 at the time of opening and the anti-slip performance can be improved, and the pain felt by the user at the time of opening can be alleviated. The width W1 is desirably equal to each other for all the first knurl regions 13.

  The width W2 of the second knurl region 14 can be 1.5 mm or more. The width W2 is preferably set to, for example, 1.5 mm to 5 mm (preferably 1.5 mm to 4 mm). The width W2 of the second knurl region 14 is preferably 1.6% or more with respect to the entire circumference of the main portion 8. For example, it is suitable to set it as 1.6 to 5.4% (preferably 1.6 to 4.3%). The total width W2 of the second knurl region 14 is preferably 20% or more with respect to the entire circumference of the main portion 8. For example, 20 to 80% (preferably 30 to 50%) is suitable.

  If the width W2 is too narrow, the effect of relieving the pain felt by the user when the user opens the cap 1 is reduced. However, by setting the width W2 in the above range, the effect of relieving the pain of the finger is enhanced. be able to. If the width W2 is too wide, the effect of relieving the pain of the user's fingers when opening the plug is reduced, but by making the width W2 in the above range, the effect of relieving the pain of the fingers can be enhanced. The width W2 is desirably equal to each other for all the second knurl regions 14. By setting the width W2 in the above range, it is possible to enhance the effect of relieving pain felt by the user's fingers when the cap 1 is opened.

  The ratio W1 / W2 between the width W1 of the first nar region 13 and the width W2 of the second nar region 14 can be set to 0.6 to 3 (preferably 0.6 to 2.4). If the width ratio W1 / W2 is too small, the effect of relieving the pain felt by the user's fingers when opening the plug becomes small. On the other hand, when the formation ratio W1 / W2 is too large, the effect of relieving the pain felt by the user's fingers when opening the plug is reduced. By setting the width ratio W1 / W2 in the above range, it is possible to enhance the effect of alleviating the pain felt by the user's fingers when the cap is opened.

  A knurled portion 12 is formed on the outer peripheral surface of the main portion 8 of the cylindrical portion 3. The knurled portion 12 has a function of increasing the surface friction of the outer peripheral surface of the cylindrical portion 3 and reducing the force required to rotate the cap 1 when the user opens and closes the cap 1.

The knurl part 12 has a plurality of first knurl projections 15 and a plurality of second knurl projections 16.
As shown in FIGS. 3 and 4, the first knurl projection 15 is formed in the first knurl region 13 so as to project outward in the radial direction of the tube portion 3. The cross-sectional shape of the first knurl projection 15 is not particularly limited, and can be, for example, an arc shape or a polygonal shape. As shown in FIG. 1, the first knurls 15 are linearly formed in the vertical direction from the upper part to the lower part of the main part 8. The plurality of first knurl projections 15 are formed at intervals in the circumferential direction of the cylindrical portion 3.

As shown in FIGS. 3 and 4, the protrusion height H1 of the first knurl projection 15 (height from the outer peripheral surface of the main portion 8 (first knurl region 13)) is 0.1 mm or more (preferably 0). .3 mm or more) is preferable. By setting the projecting height H1 within the above range, the finger can be reliably locked to the first knurled convex portion 15 at the time of opening, so that the opening operation of the cap 1 is facilitated. The protrusion height H1 can be set to 0.5 mm or less, for example. By setting the protruding height H1 within the above range, it is possible to alleviate the pain of the fingers at the time of opening. The protrusion height H1 is preferably constant in the length direction of the first knurl projection 15.
Of the first knurls 15, the first knurls 15 (for example, the first knurls 15 </ b> A shown in FIGS. 3 and 4) formed at positions including the boundary with the second knurl region 14 are: Although the height from the first knurl region 13 is different from the height from the second knurl region 14, the height from the first knurl region 13 is defined as the protruding height of the first knurl region 13.

It is preferable that the plurality of first nar protrusions 15 in the same first nar region 13 have the same height. “Same height” means, for example, when the plurality of first knurl projections 15 are compared with each other, the average value H _ave1 of the projection height H1 of the first knurl projection 15 to be compared, It means that the difference from the protrusion height H1 of the 1- _nal protrusion 15 is within a range of ± 20% with respect to the average value _Have1 .
In the cap 1, the projecting heights H <b> 1 of the plurality of first nar protrusions 15 are preferably the same in at least one first nar region 13, and the first nar protrusions 15 of all the first nar regions 13. More preferably, the protrusion heights H1 of the two are the same.

As shown in FIG. 3, the width W3 of the first knurl projection 15 is preferably 0.2 mm or more (preferably 0.5 mm or more). The width W3 can be set to, for example, 0.2 mm to 1.5 mm (preferably 0.5 mm to 1.2 mm).
As shown in FIG. 1, the pitch P1 of the first knurls 15 (distance in the cap circumferential direction between the vertices of two adjacent first knurls 15) is 0.5 to 3 mm (preferably 1 to 3 mm). ) Is preferred. By setting the pitch P1 in the above range, the finger can be reliably locked to the first knurled portion 15 at the time of opening and the pain of the finger can be alleviated.

  As shown in FIGS. 3 and 4, the second knurl projection 16 is formed in the second knurl region 14 so as to project outward in the radial direction of the tube portion 3. The cross-sectional shape of the second knurled portion 16 is not particularly limited, and can be, for example, an arc shape or a polygonal shape. As shown in FIG. 1, the second knurled convex portion 16 is formed in a straight line shape from the upper portion to the lower portion of the main portion 8 along the vertical direction in plan view. The plurality of second knurl projections 16 are formed at intervals in the circumferential direction of the cylindrical portion 3.

  As shown in FIGS. 3 and 4, the protrusion height H2 of the second knurl projection 16 (height from the outer peripheral surface (second knurl region 14) of the main portion 8) is 0.1 mm or more (preferably 0). .3 mm or more) is preferable. By setting the protruding height H2 within the above range, the finger can be easily locked to the second knurled convex portion 16, so that the cap 1 can be easily opened. The protrusion height H2 can be set to 0.5 mm or less, for example. By setting the protruding height H2 within the above range, it is possible to alleviate the pain of the fingers when the cap is opened. It is preferable that the protrusion height H2 is constant in the length direction of the second knurl projection 16.

The second knurl projection 16 is preferably the same height as the first knurl projection 15. “Same height” means, for example, the average value H _ave1 of the protrusion height H1 of the first knurl projection 15 to be compared when the second knurl projection 16 and the first knurl projection 15 are compared. And the protrusion height H2 of the second knurl projection 16 is ± 20 with respect to the average value H _ave1 of the heights of the first knurl projections 15 for all the second knurl projections 16 to be compared. It is in the range of%.

The plurality of second nar protrusions 16 in the same second nar region 14 are preferably at the same height. In FIG. 3 and FIG. 4, the three second nar protrusions 16 in one second nar region 14 have the same height. “Same height” refers to, for example, the average value H _ave2 of the projecting height H2 of the second knurl projections 16 to be compared with each other when the plurality of second knurl projections 16 are compared with each other, It means that the difference from the protrusion height H2 of the 2-Knar projection 16 is within a range of ± 20% with respect to the average value _Have2 .
In the cap 1, it is preferable that the plurality of second knurls 16 in the at least one second knurl region 14 have the same height as each other, and the height of the second knurls 16 in all the second knurl regions 14. More preferably, the lengths are the same.

As shown in FIG. 3, the width W4 of the second knurl projection 16 is preferably 0.2 mm or more (preferably 0.5 mm or more). The width W4 can be set to, for example, 0.2 mm to 1.5 mm (preferably 0.5 mm to 1.2 mm).
As shown in FIG. 1, the pitch P2 of the second knurl projections 16 (the distance in the cap circumferential direction between the vertices of two adjacent second knurl projections 16) is 0.5 to 3 mm (preferably 1 to 3 mm). ) Is preferred. By setting the pitch P2 within the above range, the finger can be easily locked to the second knurled convex portion 16 at the time of opening, and the pain of the finger can be alleviated. It is preferable that the pitch P2 is the same as the pitch P1 of the first knurl projections 15.
The pitch between the adjacent first knurls 15 and the second knurls 16 (the distance in the cap circumferential direction between the vertices of the first knurls 15 and the second knurls 16) is the distance between the first knurls 15. The pitch P1 is preferably the same as the pitch P1.

  As shown in FIG. 1, the number of second nar protrusions 16 formed in one second nar region 14 is not particularly limited, but is preferably 3 or more. The number of the second knurls 16 can be 3 to 6 (preferably 3 to 5), for example. In the example shown in FIG. 1, three second nar protrusions 16 are formed in one second nar region 14. By setting the number of the second knurls 16 formed in one second knurl area 14 within the above range, the finger is engaged with the second knurls 16 when the user holds the cap 1 when opening the cap. It is easier to stop, and can relieve finger pain.

As shown in FIGS. 2, 3, and 4, the second knurl region 14 is lower than the first knurl region 13, so that the top 16 a of the second knurl convex portion 16 is in the radial direction of the tube portion 3. Compared to the top 15 a of the first knurl projection 15, it is at a lower position.
As shown in FIG. 2, the maximum value of the height difference H3 of the top 16a of the second Naru convex portion 16 with respect to the top 15a of the first Naru convex portion 15 is preferably 0.05 mm or more (preferably 0.1 mm or more). . By setting the height difference H3 within the above range, it is possible to alleviate finger pain caused by the knurled portion 12 when the user holds the cap 1 when opening the cap. The height difference H3 can be set to 0.5 mm or less, for example. By setting the height difference H3 in the above range, the locking force of the knurl portion 12 (second knurl projection 16) can be increased when the user opens the cap 1.

  In the cap 1, the top portions 16 a of all the second knurl projections 16 are located lower than the top portions 15 a of the first knurl projections 15 in the radial direction of the cylindrical portion 3. It is only necessary that at least some of the top portions 16 a of 16 are in a lower position in the radial direction of the cylindrical portion 3 than at least one top portion 15 a of the first knurl projections 15.

  The cap 1 can be made of a synthetic resin material such as high density polyethylene or polypropylene.

As shown in FIG. 5, as the container 20 to which the cap 1 is attached, a synthetic resin container such as polyethylene terephthalate (PET) can be used. A male screw 22 is formed on the outer surface of the mouth portion 21 of the container 20. The locking step 23 is an annular protrusion that protrudes radially outward.
The container 20 and the cap 1 attached to the mouth portion 21 constitute a closing device.

Next, the process of opening the cap 1 will be described.
In the closed state shown in FIG. 5, when the user grips the cylindrical portion 3 and rotates it in the opening direction, the main portion 8 rises as it rotates, and the locking protrusion 11 locks to the locking step portion 23. The upward movement of the TE ring portion 9 is prevented, and a tensile force acts on a bridge (not shown) connecting the main portion 8 and the TE ring portion 9. The bridge 7 is broken by the tensile force, and the TE ring portion 9 is separated from the main portion 8. This clearly indicates that the cap 1 has been opened.

In the cap 1, the top 16 a of the second knurl convex portion 16 is at a lower position than the top portion 15 a of the first knurl convex portion 15, so that when the user grips the cap 1 when opening and closing the cap, The force applied to the fingers from the part 16 can be reduced. Therefore, the pain of the finger by the nar part 12 can be relieved.
Since the second knurl region 14 in which the second knurl projection 16 is formed is at a position lower than the first knurl region 13, the second knurl projection 16 can be given a sufficient height. Therefore, the second knurled portion 16 can also exert a high locking force. Therefore, the anti-slip performance is less likely to decrease due to the second knurls 16 being in a low position.
Therefore, the cap 1 can be easily opened and closed, and can reduce finger pain when the user holds and rotates the cap.

  The closure device shown in FIG. 5 can be made into a beverage-containing closure device by filling containers such as carbonated beverages, fruit juice beverages, tea beverages, and coffee beverages.

In addition, the number of the 2nd Nar convex parts 16 formed in one 2nd Nar area | region 14 is not limited to the example shown in FIG. For example, the configuration shown in FIG. 6 may be adopted.
FIG. 6 is a front view showing a cap 1 </ b> A that is a modification of the cap 1. The cap 1A is different from the cap 1 shown in FIG. 1 in that the number of second knurl projections 16 formed in one second knurl region 14 is four.

Next, a second embodiment of the cap of the present invention will be described. In addition, about the structure mentioned above, the same code | symbol may be attached | subjected and the description may be abbreviate | omitted.
FIG. 7 is a front view showing a cap 101 which is the second embodiment of the cap of the present invention. FIG. 8 is a cross-sectional view taken along the central axis C1, showing a part of the cap 101 shown in FIG. FIG. 9 is a cross-sectional view showing a part of the cap 101, and is a cross-sectional view taken along the line III-III ′ in FIG.

As shown in FIG. 7, the outer peripheral surface of the main portion 8 has a first knurl region 13 and a second knurl region 114.
The first knurl areas 13 and the second knurl areas 114 are alternately arranged in the circumferential direction of the cylindrical portion 3.
The second knurl area 114 is a part from the upper part to the lower part of the main part 8 in the circumferential direction of the cylindrical part 3, and has a substantially constant width in the vertical direction.

  As shown in FIG. 8, the second knurl region 114 has the same tilt angle with respect to the central axis C <b> 1 (vertical direction in FIG. 8) as the tilt angle in the first knurl region 13. Therefore, the second knurl region 114 is at the same height as the first knurl region 13 in the radial direction of the cylindrical portion 3.

As shown in FIG. 7, the width W5 of the second knurl region 114 can be 1.5 mm or more. The width W5 is suitably set to, for example, 1.5 mm to 5 mm (preferably 1.5 mm to 4 mm). By setting the width W5 in the above range, it is possible to enhance the effect of relieving pain of fingers when the user opens the cap 1.
The width W5 of the second knurl region 114 is preferably 1.6% or more with respect to the entire circumference of the main portion 8. For example, it is suitable to set it as 1.6 to 5.4% (preferably 1.6 to 4.3%). The total width W5 of the second knurl region 114 is preferably 20% or more with respect to the entire circumference of the main portion 8. For example, 20 to 80% (preferably 30 to 50%) is suitable. By setting the width W5 within the above range, it is possible to enhance the effect of relieving pain felt by the user's fingers when the cap 1 is opened.

  A ratio W1 / W5 between the width W1 of the first nar region 13 and the width W5 of the second nar region 114 can be set to 0.6 to 3 (preferably 0.6 to 2.4). By setting the width ratio W1 / W5 in the above range, it is possible to enhance the effect of alleviating the pain felt by the user's fingers when the cap is opened.

  A knurled portion 112 is formed on the outer peripheral surface of the main portion 8 of the cylindrical portion 3. The knurl part 112 has a plurality of first knurl protrusions 15 formed in the first knurl area 13 and a plurality of second knurl protrusions 116 formed in the second knurl area 114.

  As shown in FIG. 9, the second knurl projection 116 is formed in the second knurl region 114 so as to project outward in the radial direction of the tube portion 3. The cross-sectional shape of the second knurl projection 116 is not particularly limited, and may be, for example, an arc shape or a polygonal shape. As shown in FIG. 7, the second knurl projection 116 is formed in a straight line along the vertical direction in plan view from the upper part to the lower part of the main part 8. The plurality of second knurl projections 116 are formed at intervals in the circumferential direction of the cylindrical portion 3.

  As shown in FIG. 9, the protrusion height H4 of the second knurl projection 116 (height from the outer peripheral surface of the main portion 8 (second nar region 114)) is preferably 0.1 mm or more. . By setting the protruding height H4 within the above range, the finger can easily be locked to the second knurled convex portion 116 at the time of opening, so that the cap 101 can be easily opened. The protrusion height H4 can be set to 0.3 mm or less, for example. By setting the protruding height H4 within the above range, it is possible to alleviate the pain of the fingers when the cap is opened. It is preferable that the protrusion height H4 is constant in the length direction of the second knurl projection 116.

  The protrusion height H4 of the second knurl protrusion 116 is lower than the protrusion height H1 of the first knurl protrusion 15. The protrusion height H4 of the second knurl protrusion 116 is preferably 70% or less (preferably 50% or less) of the protrusion height H1 of the first knurl protrusion 15. By setting the ratio (H4 / H1) of the protrusion height H4 to the protrusion height H1 within the above range, it is possible to alleviate finger pain caused by the knurled portion 12 when the user holds the cap 1 at the time of opening. The ratio H4 / H1 can be set to 20% or more, for example. By setting the ratio H4 / H1 in the above range, the locking force of the knurled portion 12 (second knurled convex portion 16) can be increased when the user opens the cap 1.

The plurality of second nar protrusions 116 in the same second nar region 114 are preferably at the same height. “Same height” means, for example, the average value H _ave3 of the heights of the second knurl projections 116 to be compared with each of the second knurl projections 116 and the individual second knurls. It means that the difference from the protrusion height H4 of the convex portion 116 is within a range of ± 20% with respect to the average value H _ave3 .
In the cap 101, the plurality of second nar protrusions 116 in the at least one second nar region 114 have the same height. The second knurls 116 preferably have the same height in all the second knurl regions 114.

The width W6 of the second knurl projection 116 is preferably 0.1 mm or more (preferably 0.2 mm or more). The width W6 can be set to, for example, 0.1 mm to 1 mm (preferably 0.2 mm to 0.8 mm).
As shown in FIG. 7, the pitch P3 of the second knurl projections 116 (distance in the cap circumferential direction between the apexes of two adjacent second knurl projections 116) is 0.5 to 3 mm (preferably 1 to 3 mm). ) Is preferred. By setting the pitch P3 in the above range, it is possible to easily lock the finger with the second knurled convex portion 116 at the time of opening, and to relieve the finger pain. The pitch P3 is preferably the same as the pitch P1 of the first knurl projections 15.
The pitch between the adjacent first knurls 15 and the second knurls 116 (the distance in the cap circumferential direction between the vertices of the first knurls 15 and the second knurls 116) is the distance between the first knurls 15. The pitch P1 is preferably the same as the pitch P1.

  The number of second knurls 116 formed in one second knurl region 114 is preferably three or more. The number of the second knurl projections 116 can be 3 to 6 (preferably 3 to 5), for example. By setting the number of the second knurls 116 formed in one second knurl region 114 within the above range, the finger is engaged with the second knurls 116 when the user holds the cap 101 at the time of opening. It is easier to stop, and can relieve finger pain.

  As shown in FIG. 9, when the second knurl projection 116 has a circular arc shape, the radius of curvature of the outer peripheral surface of the second knurl projection 116 can be set to, for example, 0.1 to 0.4 mm. .

Since the protruding height H4 of the second knurl convex portion 116 is lower than the protruding height H1 of the first knurl convex portion 15, the top portion 116a of the second knurl convex portion 116 is the first knurl in the radial direction of the cylindrical portion 3. It is in a lower position than the top portion 15a of the convex portion 15.
The maximum value of the height difference H5 of the top portion 116a of the second knurl convex portion 116 with respect to the top portion 15a of the first knurl convex portion 15 is preferably 0.05 mm or more (preferably 0.1 mm or more). By setting the height difference H5 within the above range, it is possible to alleviate finger pain caused by the knurled portion 12 when the user holds the cap 101 when the cap is opened. The height difference H5 can be set to 0.5 mm or less, for example. By setting the height difference H5 within the above range, the locking force of the knurled portion 12 (second knurled convex portion 116) can be increased when the user opens the cap 101.

  In the cap 101, the top portions 116a of all the second knurl projections 116 are lower than the top portions 15a of the first knurl projections 15 in the radial direction of the cylindrical portion 3, but the second knurl projections It suffices that at least a part of the top portion 116 a of 116 is lower than the at least one top portion 15 a of the first knurled portion 15 in the radial direction of the cylindrical portion 3.

  The cap 101 can be made of a synthetic resin material such as high-density polyethylene or polypropylene.

In the cap 101, since the top part 116a of the second knurl convex part 116 is lower than the top part 15a of the first knurl convex part 15, the finger by the knurl part 12 when the user holds the cap 101 when the cap is opened. Can relieve pain.
In the cap 101, in the at least one second nar region 114, since the protrusion heights H4 of the second nar protrusions 116 are the same, if the second nar protrusions are provided with a sufficient height, the second nar protrusions The part 116 can exhibit a high locking force.

In addition, the curvature radius of the outer peripheral surface of the 2nd knurl convex part 116 is not limited to the example shown in FIG. For example, you may employ | adopt the structure shown in FIG.
FIG. 10 is a front view showing a cap 101 </ b> A that is a modification of the cap 101. The cap 101A is different from the cap 101 shown in FIG. 7 in that the radius of curvature of the outer peripheral surface of the second knurl convex portion 116A exceeds 0.4 mm and is 0.6 mm or less.

(Example 1)
A cap 1 shown in FIG. 1 was produced. The protrusion heights H1 and H2 of the first knurl convex portion 15 and the second knurl convex portion 16 were 0.35 mm. The maximum value of the height difference H3 of the top part 16a of the second Narl convex part 16 with respect to the top part 15a of the first Narl convex part 15 was 0.5 mm. The maximum value of the depth D1 of the second nar region 14 relative to the first nar region 13 was 0.5 mm. The widths W3 and W4 of the first knurl projection 15 and the second knurl projection 16 were 1 mm. The pitches P1 and P2 were 2.15 mm. The number of first knurls 15 formed in one second knurl region 14 is three. The width W1 of the first nar region 13 was 2.2 mm, and the width W2 of the second nar region 14 was 1.6 mm. W1 / W2 is about 1.4. The outer diameter of the cap 1 (the outer diameter of the main portion 8) is about 28 mm.
The cap 1 was attached to the mouth portion 21 of the container 20 having a capacity of about 100 ml.

(Comparative Example 1)
A cap in which the inclination angle of the second knurl region with respect to the central axis C1 was the same as the inclination angle in the first knurl region was produced. In this cap, the second knurl region is at the same height position in the radial direction of the cylindrical portion as compared to the first knurl region. The cross-sectional shape, protrusion height, and pitch of the knurl projections of the cap are the same as the cross-sectional shape, protrusion height, and pitch of the first knurl projections, respectively. Other conditions were determined according to Example 1.
This cap was attached to the mouth portion 21 of the container 20 having a capacity of about 100 ml.

(Comparative Example 2)
A cap similar to the cap of Comparative Example 1 was produced except that the pitch of the knurls was doubled relative to Comparative Example 1.
This cap was attached to the mouth portion 21 of the container 20 having a capacity of about 100 ml.

The caps of the examples and comparative examples were subjected to the next test.
(1) Opening sensory test (easy to open)
Ten female panelists were allowed to open each of Example 1 and Comparative Example 1 in succession, and evaluated the ease of opening. The sample was cooled to 5 ° C. until immediately before the test, and the test was performed at room temperature in a state where condensation occurred on the cap surface.
As a result, all panelists evaluated that Example 1 was easier to open than Comparative Example 1.

(2) Opening sensory test (hand pain)
Ten female panelists were allowed to open the plugs of Example 1 and Comparative Example 2 in succession, and evaluated the pain of the hand at the time of opening. The sample was cooled to 5 ° C. until immediately before the test, and the test was performed at room temperature in a state where condensation occurred on the cap surface.
As a result, all panelists evaluated that Example 1 had less hand pain at the time of opening than Comparative Example 2.
From the results of these tests, it was confirmed that in Example 1, when the user grips and rotates the cap, there is little finger pain and the opening operation becomes easy.

About the specific structure of a cap, unless it deviates from the main point of this invention, the structure quoted in the above-mentioned embodiment can be selected or changed into another structure suitably.
For example, in the cap 1 shown in FIG. 1, the outer peripheral surface of the main portion 8 has a plurality of first nar regions 13 and a plurality of second nar regions 14, but the number of the first nar regions and the second nar regions 14. However, the outer peripheral surface of the main part only needs to have at least one first nar area and at least one second nar area.

In the cap 1, a plurality of first knurl projections are formed in the first knurl region, and a plurality of second knurl projections are formed in the second knurl region. The number of first knurls formed and the number of second knurls formed in one second knurl region are not limited to this, and can be one or more.
In the cap 1, the second knurl region 14 is almost entirely lower than the first knurl region 13 in the radial direction of the cylindrical portion 3, but at least a part of the second knurl region 14 is in the first knurl region. It suffices if it is lower than the radial direction of the cylindrical portion.

1 Cap (Synthetic resin cap)
2 Top plate part 3 Tube part 7 Bridge 8 Main part 9 TE ring part (tamper evidence ring part)
DESCRIPTION OF SYMBOLS 10 Thread part 11 Locking protrusion 12 Knurl part 13 1st knurl area | region 14 2nd knurl area | region 15 1st knurl convex part 15a Top part 16,116 of 2nd knurl convex parts 16a, 116a 2nd knurl convex part Top portion 20 Container 21 Mouth portion 22 Male screw 23 Locking step portion H1 Projection height H2 of the first knurl projecting portion H4 Projection height of the second knurl projecting portion H4 Projection height of the second knurl projecting portion

Claims (8)

A synthetic resin cap attached to the mouth of the container,
It has a top plate and a cylindrical part that hangs down from its periphery,
The outer peripheral surface of the cylindrical portion has a first knurl region and a second knurl region at least a part of which is lower in the radial direction of the tube portion than the first knurl region,
In the first knurl region, one or a plurality of first knurl projections extending in the hanging direction are formed,
In the second nar area, one or a plurality of second nar protrusions extending in the hanging direction are formed,
A synthetic resin cap in which at least a part of the top part of the second knurl convex part is at a position lower than the top part of at least one of the first knurl convex parts in the radial direction of the cylindrical part.   2. The synthetic resin cap according to claim 1, wherein a protruding height of the first knurl convex portion and a protruding height of the second knurl convex portion are the same.   3. The synthetic resin cap according to claim 1, wherein projecting heights of the plurality of second nar protrusions in the at least one second nar region are the same as each other.   The synthetic resin cap according to any one of claims 1 to 3, wherein the first knurl region and the second knurl region are formed at different positions in the circumferential direction of the cylindrical portion. A synthetic resin cap attached to the mouth of the container,
It has a top plate and a cylindrical part that hangs down from its periphery,
The outer peripheral surface of the cylindrical portion has a first knurl area and a second knurl area,
In the first knurl region, one or a plurality of first knurl projections extending in the hanging direction are formed,
In the second nar area, a plurality of second nar protrusions extending in the hanging direction are formed,
In the at least one second nar region, the plurality of second nar protrusions have the same protrusion height, and the protrusion height is lower than at least a part of the first nar protrusion. . The cylindrical portion is partitioned into a main portion and a tamper evidence ring portion connected to the main portion by a bridge,
On the inner peripheral surface of the main part, a screw part that is screwed into the male screw of the mouth part is provided,
The tamper-evidence ring portion is provided with a plurality of locking protrusions that are locked to the locking step portion of the mouth portion when opening to prevent movement of the tamper-evidence ring portion. The synthetic resin cap according to any one of 5. A closure device comprising a container filled with a beverage and a cap attached to the mouth part thereof,
The said cap is a thing of any one of Claims 1-6, The closing device characterized by the above-mentioned. A beverage-containing closure device comprising a container filled with a beverage and a cap attached to the mouth portion thereof,
The said cap is a thing of any one of Claims 1-6, The drink containing closure apparatus characterized by the above-mentioned.

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