JP2005193962A - Bottle can, and bottle can having cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottle can, and a bottle can having a cap for which unplugging can be performed so that the cap and the can main body do not corotate by preventing slip out motion of a shrink film. <P>SOLUTION: This bottle can 100 is equipped with a barrel section 3, a shoulder section 4 of which the diameter gradually becomes smaller as it goes up from the upper end of the barrel section 3, and a mouthpiece section 6 on which the cap 8 is fitted, and at least the barrel section 3 is covered with the shrink film 2. In the bottle can 100, an ink layer 10 which generates a step on the outer peripheral wall 9 of the barrel section 3 is provided on the outer peripheral wall 9 of the barrel section 3 corresponding to the shrink film 2. A plurality of the ink layers 10 are provided in the circumferential direction of the barrel section 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bottle can provided with an anti-slip structure for a shrink film and a bottle can with a cap.

Conventionally, an aluminum alloy bottle can filled with a soft drink or the like is known.
This bottle can generally includes a large-diameter body part, a shoulder part that gradually decreases in diameter as it goes upward from the upper end of the body part, and a base part that is provided at the upper end part of the shoulder part and has a smaller diameter than the body part. The cap is detachably attached to the base so that it can be re-closed even when it is opened to drink a soft drink or the like at any time.
Incidentally, some bottle cans have a shrink film affixed to the outer peripheral wall in order to enhance decorativeness. (For example, refer to Patent Document 1.)
JP 2003-81276 A

However, in the bottle can, when the cap is opened, the outer surface of the shrink film is gripped. However, a slip occurs between the shrink film and the bottle can surface, and the cap and the can body rotate together. May end up.
Therefore, in order to open the cap, it is necessary to firmly grip the shrink film from the outer surface so that the shrink film does not slip. Therefore, it is difficult to open the bottle, and the bottle can that can be opened and closed freely. There is a problem that the advantages of can not be fully demonstrated.

  Therefore, the present invention provides a bottle can that prevents the shrink film from slipping and can be opened without the cap and the can body rotating together.

In order to solve the above-mentioned problems, the invention described in claim 1 includes a trunk portion (for example, the trunk portion 3 in the embodiment) and a shoulder portion (for example, an embodiment in which the diameter gradually decreases from the upper end of the trunk portion toward the upper side). A shoulder portion 4) in the form and a base portion (for example, the base portion 6 in the embodiment) to which a cap (for example, the cap 8 in the embodiment) is attached, and at least the body portion is a shrink film (for example, in the embodiment) In the bottle can covered with the shrink film 2) in the form (for example, the bottle can 100 in the embodiment), the outer peripheral wall of the body portion corresponding to the shrink film is provided with an ink layer that causes a step in the outer peripheral wall, A plurality of ink layers are provided in the circumferential direction of the body portion.
With this configuration, when opening the bottle can, the shrink film fits into the step between the can body and the ink layer, and the shrink film slips when the body is gripped from any angle. Can be prevented.

According to the second aspect of the present invention, a belt-like ink layer (for example, the ink layer 10 in the embodiment) is formed along the axial direction on the outer peripheral wall (for example, the outer peripheral wall 9 in the embodiment) of the body portion. A plurality of ink layers are provided in the circumferential direction of the body portion.
By configuring in this way, when opening the bottle can, no matter what height of the body part is gripped, the film fits in the step between the can body and the ink layer and prevents the shrink film from slipping can do.

The invention described in claim 3 is characterized in that the ink layer is a foamed ink.
By comprising in this way, a frictional force can be directly or via an overcoating layer by the unevenness | corrugation of the surface of the said foaming ink, and a frictional force with the said shrink film can be increased.

According to a fourth aspect of the present invention, there is provided a bottle can comprising a body portion and a shoulder portion that gradually decreases in diameter from the upper end of the body portion toward the upper side, and at least the body portion is covered with a shrink film. A foamed ink layer (for example, the ink layer 10 in the embodiment) is provided on the surface of the foamed ink, and the shrinkage is generated by generating frictional force by the irregularities on the surface of the foamed ink. The frictional force with the film can be increased.

According to a fifth aspect of the present invention, in the bottle can comprising a body portion and a shoulder portion that gradually decreases in diameter from the upper end of the body portion upward, at least the body portion is covered with a shrink film, and the outer peripheral wall of the body portion An overcoating unpainted portion (for example, the background 15 in the embodiment) is provided on the surface.
By constituting in this way, by holding the outside of the shrink film corresponding to the unpainted part of the overcoating, the shrink film is used by utilizing the frictional force between the background of the can body or the ground coating and the shrink film. It can be prevented from rotating.

The invention described in claim 6 includes a body portion and a shoulder portion that gradually decreases in diameter from the upper end to the upper portion of the body portion, and the bottle can covered with the shrink film from the body portion to the shoulder portion. A plurality of concave and convex portions (for example, the groove portion 16 in the embodiment) are provided on the corresponding outer peripheral wall of the shoulder portion in the circumferential direction of the shoulder portion.
With this configuration, when the shrink film is coated, the shrink film on the shoulder is shrunk into a shape corresponding to the uneven portion, and the shrink film itself is locked to the uneven portion, so that the shrink film Slip can be prevented.

The invention described in claim 7 includes a body portion and a shoulder portion that gradually decreases in diameter as it goes upward from the upper end of the body portion, and in the bottle can covered with the shrink film from the body portion to the shoulder portion, At least one of the corresponding body part and shoulder part is formed in a polygonal cross section (for example, the flat part 20 and the ridge line 21 in the embodiment).
With this configuration, when the shrink film is covered, the shrink film of the trunk portion is contracted to a shape corresponding to either the shoulder portion or the trunk portion, and the ridge line portion of the polygonal portion is engaged. It is possible to prevent the shrink film from slipping.

  According to the first aspect of the present invention, when the bottle can is opened, the shrink film fits into the step between the can body and the ink layer regardless of the angle at which the body is gripped, and the shrink Since the film can be prevented from slipping, the opening operation can be easily performed with a small gripping force.

  According to the second aspect of the invention, in addition to the effect of the first aspect, when opening the bottle can, a film is formed on the step between the can body and the ink layer regardless of the height of the body portion. The shrinkage of the shrink film can be prevented because it gets caught and is easy to open.

  According to the invention described in claim 3, in addition to the effect of claim 1 or claim 2, the shrinkage is generated by generating a frictional force directly or via an overcoating layer due to unevenness of the surface of the foamed ink. Since the frictional force with the film can be increased, the bottle can can be easily opened with a small gripping force.

  According to the invention described in claim 4, since the frictional force can be increased by the unevenness of the surface of the foamed ink to increase the frictional force with the shrink film, the frictional force between the shrink film and the bottle can Therefore, it is possible to prevent the cap and the bottle can from co-rotating.

  According to the invention described in claim 5, by grasping the outside of the shrink film corresponding to the unpainted portion of the overcoating, utilizing the friction force between the background of the can body or the base coating and the shrink film, Since the shrink film can be prevented from rotating, the bottle can can be easily opened, and the coating area can be reduced, thereby reducing the cost.

  According to the invention described in claim 6, when the shrink film is covered, the shrink film on the shoulder is shrunk into a shape corresponding to the uneven portion, and the shrink film itself is locked to the uneven portion, Since the shrinkage of the shrink film can be prevented, the strength of the shrink film can be used to effectively prevent the cap and the bottle can from rotating together.

  According to the invention described in claim 7, when the shrink film is coated, the shrink film of the trunk portion is contracted to a shape corresponding to either the shoulder portion or the trunk portion, and the ridge line of the polygonal portion Since the shrinkage of the shrink film can be prevented by locking the part, the strength of the film can be used to prevent the cap and the bottle can from co-rotating with a simple shape, and the body part. If the cross section is polygonal in cross section, it is easy for a person to open the cap to grip it, so that it is possible to easily apply a force in the circumferential direction.

A first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIGS. 1 to 4, the bottle can 100 includes a can body 1 and a shrink film 2. The can body 1 is formed of a thin plate of aluminum or aluminum alloy, and includes a body portion 3, a shoulder portion 4 that gradually decreases in diameter from the upper end of the body portion 3 upward, and a bulge provided at the upper end of the shoulder portion 4. A portion 5 and a cap portion 6 provided at the upper end of the bulging portion 5 and having a diameter smaller than that of the body portion 3. The base part 6 is provided with a screw part 7 and is sealed by attaching a cap 8. The cap 8 is shown only in FIG. 1 of the first embodiment, and the illustration of the following second embodiment and subsequent embodiments is omitted.
Although a size coating layer is provided as an undercoat on substantially the entire surface of the can body 1, for convenience of illustration, this size coating layer is omitted in FIGS.

An ink layer 10 is provided on the outer peripheral wall 9 of the body portion 3. The ink layer 10 is for generating a step in the outer peripheral wall 9 of the body part 3, and is formed on the outer peripheral wall 9 of the body part 3 along the axial direction of the body part 3.
Specifically, the ink layer 10 includes an inclined portion 12 that expands from the bottom 11 of the can body 1 to the upper side from the vicinity of the boundary between the shoulder portion 4 and the body portion 3 of the can body 1 and the body portion 3. A plurality of strips are formed in the vicinity of the boundary of the outer peripheral wall 9 at predetermined intervals along the circumferential direction of the outer peripheral wall 9. Further, the interval corresponds approximately to the width dimension of the strip-shaped ink layer 10. The width dimension between the ink layers 10 and the width dimension of the ink layer 10 can be freely set.

Here, foamed ink is used for the ink layer 10. This foamed ink has foamable microcapsules containing bubbles (for example, a particle size of about 6 to 30 μm), and specifically, the size of foam to be foamed by selecting the particle size of the microcapsules. Can be changed.
In addition, the ink layer 10 formed of the foamed ink has a thickness a (for example, about 24 to 120 μm, preferably about 24 to 60 μm). It is faced.

An overcoating layer 13 is laminated on the ink layer 10. The overcoating layer 13 contains a wax component as a surface finish, and is thinner than the belt-like ink layer 10 and has a thickness b (for example, 4 to 5 μm).
The overcoating layer 13 is uniformly formed not only on the ink layer 10 but also over the entire surface of the can body 1 from the base 6 to the bottom 11 of the can body 1.

  Here, as described above, since the thickness of the ink layer 10 is sufficiently larger than the thickness of the overcoating layer 13, the overcoating layer 13 and the overcoating at the location where the ink layer 10 is provided. At the boundary with the location where only the layer 13 is provided, a step is formed protruding toward the outer circumference.

A shrink film 2 is provided on the overcoating layer 13. The shrink film 2 is a type that self-shrinks when heated, and is formed of, for example, a PET film, a foamed polystyrene film, a foamed polypropylene film, or the like.
The can body 1 is covered with the shrink film 2 from the upper end of the shoulder portion 4 to the inclined portion 12.

Since the shrink film 2 is a type that self-shrinks by heat as described above, the shrink film 2 is shrunk into a shape corresponding to the step of the ink layer 10 and is covered.
Insulating effect can be obtained by covering the can body 1 with the shrink film 2. In addition, the shrink film 2 is appropriately selected according to various design forms or a transparent one that allows the surface of the can body 1 to be seen, thereby improving the appearance quality.

  Therefore, according to the first embodiment described above, an overcoating layer having a plurality of strip-shaped ink layers 10 provided on the outer peripheral wall 9 of the body portion 3 of the can body 1 and having a sufficiently smaller thickness than the ink layer 10. 13 is provided so that a plurality of steps are formed so as to protrude from the outer peripheral wall 9 of the body portion 3, and when the shrink film 2 is thermally contracted and covered, the shrink film 2 becomes familiar with the steps and is caught. Since the shrink film 2 can be prevented from sliding and rotating in the circumferential direction of the can body 1 when opening the cap, it can be easily opened with a small gripping force.

  Further, since the step is clearly formed by providing a thin overcoating layer 13 from above the band-shaped ink layer 10, the overcoating layer is prevented from co-rotating between the cap 8 and the can body 1 as in the past. 13 can be used to protect the can body 1.

  Further, the unevenness of the surface of the ink layer 10 of the foamed ink can increase the frictional force with the shrink film 2 through the overcoating layer 13 which is similarly uneven, so that the bottle can be easily used with a small gripping force. The can 100 can be opened.

Here, the case where the ink layer 10 is provided in a strip shape on the outer peripheral wall 9 of the body portion 3 has been described. However, even if the uniform ink layer 10 of foamed ink is formed on the substantially entire outer peripheral wall 9 of the body portion 3. Good.
By forming the ink layer 10 in such a wide range, the unevenness of the surface of the foamed ink can be effectively used as an anti-slip surface, and further, the foamable microcapsules described above can be used as necessary. Necessary and sufficient frictional force can be obtained by increasing the surface irregularities using the particle size. Moreover, you may make it wind the shrink film 2 directly on the trunk | drum 3 from foamed ink, without using the said overcoating layer 13. FIG.
In the first embodiment described above, the ink layer 10 is provided only on the outer peripheral wall 9 of the body portion 3, but may be provided on at least one outer peripheral wall of the body portion 3 and the shoulder portion 4. .

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted (the same applies to the following examples).
As shown in FIG. 5, a size coating layer 14 is uniformly formed as an undercoat on substantially the entire outer peripheral wall 9 of the can body 1 of the bottle can 200. Here, the size coating layer 14 is colorless and transparent and does not contain a wax component, and can exhibit a higher frictional force than the overcoating layer 13 containing a wax component.

An overcoating layer 13 is provided on the size coating layer 14. The overcoating layer 13 is in a range extending from the vicinity of the boundary between the body part 3 and the shoulder part 4 of the can body 1 to the bottom part 11, and excluding a part (height direction) of the outer peripheral wall 9. Is formed.
Here, the size coating layer 14 is a paint having a relatively low elastic modulus, and improves the adhesion with the overcoating layer 13.

  As in the first embodiment described above, the shrink film 2 is provided on the outer side of the overcoating layer 13 so as to cover the inclined portion 12 of the can body 1 from the upper end of the shoulder portion 4.

  Therefore, according to the second embodiment, by providing a portion where the overcoating layer 13 is not formed on the outer peripheral wall 9 of the body portion 3, the frictional force between the size coating layer 14 and the shrink film 2 is increased. Since it increases more than when the overcoating layer 13 is used, it can be easily opened by grasping with a small force from the outer surface of the shrink film 2 corresponding to the size coating layer 14, and the overcoating layer 13. It is possible to reduce the cost because the coating area of the coating is reduced.

In the second embodiment, the size coating layer 14 is provided. However, a colored base coating layer that does not contain a wax component may be provided instead, and as shown in FIG. May be omitted and the shrink film 2 may be covered with the ground surface 15 of the can body 1 of the bottle can 300 exposed.
As a result, like the size coating layer 14, the frictional force between the background 15 not containing the wax component and the shrink film 2 is increased, so that the outer surface of the shrink film 2 corresponding to the exposed portion of the background 15 is small. It can be easily opened by gripping with force.

Next, a third embodiment will be described with reference to FIGS. 7 and 8, the size coating layer 14 and the overcoating layer 13 on the outer peripheral wall 9 of the can body 1 are omitted for convenience of illustration. (The same applies to FIG. 9 below.)
As shown in FIG. 7, a plurality of groove portions 16 are provided in the circumferential direction in the shoulder portion 4 of the can body 1 of the bottle can 400 with a predetermined interval. As shown in FIG. 8, these groove portions 16 are formed in a V-shaped cross section including a side wall portion 17 and a bottom portion 18, and are formed over the entire region in this direction along the inclined direction of the shoulder portion 4. The shoulder 4 is formed so as to gradually become wider from the upper end to the lower end. The can body 1 is provided with a shrink film 2 covering the shoulder portion 4 and the inclined portion 12 in the same manner as in the first to second embodiments described above.

The bottom portion 18 of the groove portion 16 is formed on a curved surface so as to protrude radially inward, and the plurality of groove portions 16 are formed on the curved surface so as to protrude radially outward. It is the structure connected via the top part 19. Here, the dimension of the groove part 16 is set as follows, for example.
A width D at the upper end of the shoulder portion 4 is formed to be 5 mm or more and 13 mm or less, and a width E at the lower end of the shoulder portion 4 is formed to be 8 mm or more and 15 mm or less. The distance F between the outer surfaces of the top portion 19 and the bottom portion 18 is formed to be 0.1 mm or more and 4.0 mm or less, and the radius of curvature on the outer surface of the top portion 19 is formed to be 0.13 mm or more and 0.80 mm or less. The radius of curvature on the outer surface of 18 is formed to be 0.13 mm or more and 0.80 mm or less. Further, the wall portion 17 has a thickness t1 of 0.1 mm to 0.25 mm, and the bottom portion 18 and the top portion 19 have a thickness t2 of 0.1 mm to 0.25 mm.

  Therefore, according to the third embodiment, by providing a plurality of groove portions 16 in the circumferential direction of the shoulder portion 4 in the outer peripheral wall 9 of the shoulder portion 4 corresponding to the shrink film 2, the shrink film 2 is formed. When covering, the shrink film 2 of the shoulder 4 is contracted into a shape corresponding to the groove 16 so that the shrink film 2 itself is locked to the groove 16 to prevent the shrink film 2 from slipping. Therefore, it is possible to reliably prevent the cap 8 and the can body 1 from rotating together by using the strength of the shrink film 2.

Next, a fourth embodiment will be described with reference to FIG.
As shown in FIG. 9, the can body 1 of the bottle can 500 is obtained by molding the body portion 3 into a polygonal cross section. For example, when the can body 1 is molded, the body portion 3 is formed by embossing in a pre-process for forming a workpiece, and forms the cross-sectional polygon, that is, the plane portion 20 along the axis and these It is composed of a ridge line 21 that is a connecting portion of the plane portion 20.
In addition, the site | part which provides the said cross-sectional polygonal shape is not restricted to the said trunk | drum part 3, You may provide and form so that the said polygon side may become wide gradually as it goes to the lower end from the upper end of the said shoulder part 4. Good.

  Therefore, according to the fourth embodiment, in the can body 1 covered with the shrink film 2 from the body portion 3 to the shoulder portion 4, the planar portion 20 formed along the axial direction of the body portion 3 is provided. By providing a plurality in the circumferential direction of the body part 3, when the shrink film 2 is covered, the shrink film 2 of the body part 3 is contracted to a shape corresponding to the flat part 20, and the flat part 20 The ridgeline 21 can be locked. Therefore, since the slip of the shrink film 2 can be prevented, the strength of the shrink film 2 can be used to prevent the cap 8 and the can body 1 from rotating together, and the can body 1 Since the flat surface 20 is formed along the axis, when the can body 1 is opened, a hand can be caught on the body portion 3 to easily apply force.

Table 1 shows the measurement results of the normal temperature sliding torque of the shrink film 2 before the can body 1 is opened (the internal pressure of the can body 1 is 1.2 kg / cm ² ) in each embodiment described above.
Here, the slip torque is a torque when the shrink film starts to slip.
In Table 1, the number of measurements is four, and the average value is shown. Moreover, as a comparative example with the present invention, the outer peripheral wall 9 of the can body 1 is plain (with an overcoating layer), and the annular body along the circumferential direction of the shoulder 4 of the plain can body 1 The comparative example 2 which formed the groove | channel (baby ring: not shown) is described. (The same applies to Tables 2 to 4 below.)

  Table 2 shows the results of normal temperature sliding torque measurement of the shrink film 2 after opening (the internal pressure of the can body 1 is atmospheric pressure).

Table 3 shows the results of measuring the high temperature (55 ° C.) sliding torque of the shrink film 2 before opening (the internal pressure of the can body 1 is 1.2 kg / cm ² ).

  Further, Table 4 shows the result of measuring the high temperature (55 ° C.) sliding torque of the shrink film 2 after opening (the internal pressure of the can body 1 is atmospheric pressure).

  As can be seen from the measurement results in Tables 1 to 4, the average value of the slip torque in each embodiment of the present invention is larger than any of the plain and baby ring values in the comparative example. . Therefore, the shrink film 2 can be prevented from slipping regardless of the presence or absence of the internal pressure, the normal temperature, and the high temperature, so that the opening operation can be easily performed with a small force.

In addition, this invention is not restricted to said each embodiment, For example, the number and thickness of the strip | belt-shaped ink layer 10 can be suitably selected according to the shape of the can main body 1. FIG.
In addition to the belt-like shape, various modes may be used as long as a plurality of ink layers 10 capable of generating a step in the outer peripheral wall 9 of the can body 1 are provided.
Further, the ink layer 10 may be overcoated to increase the entire thickness.

1 is a side view of a first embodiment of the present invention. It is sectional drawing which follows the AA line of 1st embodiment of this invention. It is an enlarged view of the C section in FIG. It is sectional drawing which follows the BB line of 1st embodiment of this invention. It is a side view of 2nd embodiment of this invention. It is a fragmentary sectional view of 2nd embodiment of this invention. It is a fragmentary sectional view of 3rd embodiment of this invention. It is a side view of 3rd embodiment of this invention. It is a side view of 4th Embodiment of this invention.

Explanation of symbols

100, 200, 300, 400, 500 Bottle can 2 Shrink film 3 Body part 4 Shoulder part 6 Cap part 8 Cap 9 Outer wall 10 Ink layer 13 Overcoating layer 15 Ground 16 Groove part 20 Plane part 21 Ridge line

Claims (8)

  A bottle portion in which a body portion and a shoulder portion gradually reducing in diameter as it goes upward from the upper end of the body portion and a cap portion to which a cap is attached are provided, and at least the body portion is covered with a shrink film, the bottle corresponding to the shrink film A bottle can characterized in that an ink layer that causes a step in the outer peripheral wall is provided on the outer peripheral wall of the body portion, and a plurality of ink layers are provided in the circumferential direction of the body portion.   2. The bottle can according to claim 1, wherein a belt-like ink layer is formed along an axial direction on an outer peripheral wall of the body portion, and a plurality of ink layers are provided in the circumferential direction of the body portion.   The bottle can according to claim 1 or 2, wherein the ink layer is formed of foamed ink.   A bottle portion in which a body portion and a shoulder portion gradually reducing in diameter as it goes upward from the upper end of the body portion and a cap portion to which a cap is attached are provided, and at least the body portion is covered with a shrink film, the bottle corresponding to the shrink film A bottle can characterized in that an ink layer of foamed ink is provided on the entire outer peripheral wall of the body.   A bottle portion in which a body portion and a shoulder portion gradually reducing in diameter as it goes upward from the upper end of the body portion and a cap portion to which a cap is attached are provided, and at least the body portion is covered with a shrink film, the bottle corresponding to the shrink film A bottle can characterized in that an overcoating unpainted portion is provided on the outer peripheral wall of the body portion.   Corresponding to the shrink film in the bottle can covered with a shrink film from the body part to the shoulder part with a body part and a shoulder part gradually reducing the diameter as it goes upward from the upper end of the body part. A bottle can characterized in that a plurality of uneven portions are provided on the outer peripheral wall of the shoulder portion in the circumferential direction of the shoulder portion.   Corresponding to the shrink film in the bottle can covered with a shrink film from the body part to the shoulder part with a body part and a shoulder part gradually reducing the diameter as it goes upward from the upper end of the body part. A bottle can characterized in that at least one of the body portion and the shoulder portion is formed in a polygonal cross section. The bottle can with a cap according to claim 1, wherein a cap is attached to the base part.

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