Paper caps for dispensing containers and dispensing products

Abstract

To provide a cap allowed to exhibit a required strength with a paper base material.SOLUTION: A paper cap for a spray container includes one paper sheet S comprising a top face portion 11 and a side face portion A0 extending from the top face portion 11, in which the side face portion A0 has a plurality of portions to be superposed A1-A3. By superposing the portions to be superposed A1-A3 one over another from a base side to a tip side of the side face portion A0, an upper end is closed by the top face portion 11 and a lower end is formed with a cylindrical portion 12 made open to be attached to a spray container 1. The ratio of an outer diameter at the upper end of the cylindrical portion to an outer diameter at the lower end of the cylindrical portion (upper-end outer diameter / lower-end outer diameter) is given 0.80-1.80.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a paper cap for covering an operating part of a dispensing container and a dispensing product using the paper cap. [Background technology]

[0002] Patent Document 1 discloses the use of a paperboard cap instead of a plastic cap to protect the aerosol spray button. Patent Document 2 discloses a paper container formed into a cup shape by folding a single sheet of paper. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-238932 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-2669 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 describes a paper with a basis weight of 80 to 670 g / m 2 However, when the basis weight is small, it is difficult to ensure the strength required for a cap with only the base material. In Patent Document 2, the diameter increases from the bottom toward the opening to make it easier to put food or drink inside, but if the diameter of the opening is too large compared to the bottom, the opening will expand further when force is applied in the axial direction, making it prone to crushing and resulting in low strength.

[0005] The present invention aims to provide a cap that can exhibit the necessary strength using a paper substrate, and a discharge product that uses the cap. [Means for solving the problem]

[0006] The paper cap 10 for a discharge container of the present invention consists of a single paper sheet S having a top surface 11 and a side surface A0 extending from the top surface 11, and the side surface A0 has multiple overlapping portions A1 to A3, and the overlapping portions A1 to A3 overlap each other from the base end to the tip end of the side surface A0, thereby forming a tubular portion 12 whose upper end is closed by the top surface 11 and whose lower end is open so that it can be attached to the discharge container 1, and is characterized in that the ratio (R1 / R2) of the outer diameter R1 of the upper end of the tubular portion 12 to the outer diameter R2 of the lower end of the tubular portion 12 is 0.80 to 1.80.

[0007] Furthermore, the paper cap 10 for a discharge container of the present invention is made of a single paper sheet S having a top surface portion 11 and a side surface portion A0 extending from the top surface portion 11, and the side surface portion A0 has a plurality of overlapping portions A1 to A3, and the overlapping portions A1 to A3 overlap each other from the base end side to the tip end side of the side surface portion A0, thereby forming a tubular portion 12 whose upper end is closed by the top surface portion 11 and whose lower end is open so that it can be attached to the discharge container 1, and mountain fold lines (L2) and valley fold lines (L3) for overlapping the overlapping portions A1 to A3 each other extend from a plurality of starting points (corners P) provided at equal intervals along the outer edge of the top surface portion 11 to the side surface portion A0. As they extend toward the tip side, mountain fold lines (L2) and valley fold lines (L3) are arranged alternately in the circumferential direction, and when the circumscribed circle D of the side portion A0 is divided into an arc shape by mountain fold lines (L2) and valley fold lines (L3) extending from a certain starting point (P) and mountain fold lines (L2) extending from other starting points (P) that are adjacent to the valley fold lines (L3) in the circumferential direction, the length L23 of the arc AC23 divided by the mountain fold lines (L2) and valley fold lines (L3) extending from the same starting point (P) is 35 to 50% of the length L25 of the arc AC25 divided by two mountain fold lines (L2) extending from different starting points (P).

[0008] In the paper cap 10 for the discharge container, it is preferable that the overlapping portion 13, where the overlapping portions A1 to A3 are overlapped with each other, is rotated from the upper end to the lower end of the tubular portion 12. It is also preferable that the top surface portion 11 is a polygon having 8 to 16 angles P.

[0009] The discharge product of the present invention is characterized in that the above-mentioned paper cap for a discharge container is attached to a discharge container, and then the discharge container is packaged with a shrink film F. [Effects of the Invention]

[0010] The paper cap for a discharge container of the present invention has a tubular portion formed by overlapping the intended overlapping portions from the base end to the tip end of the side portion, so the overlapping portions have high strength.Furthermore, the ratio (R1 / R2) of the outer diameter of the upper end of the tubular portion to the outer diameter of the lower end of the tubular portion is 0.80 to 1.80, so even if the axial load-bearing force required for a cap for a discharge container is applied, the lower end will not open and collapse, and the paper base material can exhibit the required strength.

[0011] Furthermore, when the circumscribing circle of the side portion A0 is divided into an arc shape by mountain fold lines and valley fold lines extending from a certain starting point and mountain fold lines extending from another starting point adjacent to the valley fold lines in the circumferential direction, if the length of the arc divided by the mountain fold lines and valley fold lines extending from the same starting point is 35 to 50% of the length of the arc divided by two mountain fold lines extending from different starting points, the width of the intended overlapping portion can be sufficiently secured, and the paper base material can exhibit the strength required for a cap for a discharge container.

[0012] When the overlapping portions where the overlapping portions are overlapped rotate from the top end to the bottom end of the tubular portion, the strength is increased compared to when the overlapping portions are arranged irregularly. Also, when the top surface portion is a polygon with 8 to 16 corners, the number of overlapping portions is not extremely large, making it easy to manufacture.

[0013] The discharge product of the present invention can restrict radial outward expansion of the paper cap by using a shrink film, which is often used as a packaging method. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a paper cap for a discharge container of the present invention. [Figure 2]10A to 10C are partial cross-sectional side views showing the process of attaching a paper cap to a discharge container. [Figure 3] FIG. 3A is a development view of the paper cap, and FIG. 3B is a partially enlarged view of the development view. [Figure 4] 10A to 10C are plan views showing the process of making a paper cap. [Figure 5] This is a view of the paper cap viewed from below. [Figure 6] 6 is an enlarged view of the lower end of the cylindrical portion of FIG. 5. FIG. [Figure 7] FIG. 10 is a partial cross-sectional side view showing a state in which another paper cap is attached to a discharge container. DETAILED DESCRIPTION OF THE INVENTION

[0015] As shown in Figures 1 and 2, the paper cap 10 for a dispensing container of the present invention includes a top surface 11 and a tubular portion 12 extending downward from the outer periphery of the top surface 11. The tubular portion 12 has a ratio (R1 / R2) of the outer diameter R1 at the upper end of the tubular portion 12 to the outer diameter R2 at the lower end of the tubular portion 12 of 0.80 to 1.80, preferably 0.85 to 1.70. When R1 / R2 is 0.80 to 1.80, the axial load resistance required for a cap for a dispensing container is easily achieved. When R1 / R2 is 1, the outer diameter of the tubular portion 12 is constant from the upper end to the lower end. When R1 / R2 is greater than 1, the tubular portion 12 tapers, narrowing from the upper end to the lower end. When R1 / R2 is less than 1, the tubular portion 12 tapers, widening from the upper end to the lower end.

[0016] 3A, this paper cap 10 for a discharge container is made of a single paper sheet S having a top surface 11 and a side surface A0 extending radially outward from the top surface 11, and the tubular portion 12 is formed by folding the side surface A0. The top surface 11 is not folded.

[0017] The top surface 11 is a polygon with 8 to 16 angles P. It is preferable that the top surface 11 is a regular polygon with all equal interior angles. In FIG. 3A, the top surface 11 is a regular dodecagon. The diameter of the circumscribing circle (not shown) of the top surface 11 and the diameter of the circumscribing circle D of the side surface A0 have a relationship of 1:4. However, this can be changed as appropriate within the range of 1:2 to 1:8.

[0018] Starting from a corner P of the top surface portion 11, five lines extend from the base end of the side surface portion A0 toward the tip end. Specifically, the top surface portion 11 includes a first line L1 that forms the largest angle with the line L0 connecting the center point C of the top surface portion 11 to the corner P, a second line L2 that forms the second largest angle, a third line L3 that forms the third largest angle, a fourth line L4 that forms the fourth largest angle, and a fifth line L5 that forms the fifth largest angle (smallest angle). To form the tubular portion 12, the second line L2 and the third line L3 are used as fold lines. Specifically, one line (for example, the second line L2) is used as a mountain fold line, and the other line (for example, the third line L3) is used as a valley fold line. The first line L1, the fourth line L4, and the fifth line L5 are not fold lines. The first line L1 overlaps with the third line L3 on the front surface of the paper sheet S (the surface that will become the outside when the tubular portion 12 is formed), and the fourth line L4 overlaps with the second line L2 on the back surface of the paper sheet S (the surface that will become the inside when the tubular portion 12 is formed). The fifth line L5 is an imaginary line that separates the circumscribed circle D of the side portion A0, and is not a fold line and does not overlap with any other lines.

[0019] Of the five lines, the side surface portion A0 is defined by four lines L1 to L4. Specifically, the first line L1 and the second line L2 define the first overlapping portion A1. The second line L2 and the third line L3 define the second overlapping portion A2. The third line L3 and the fourth line L4 define the third overlapping portion A3. When the tubular portion 12 is formed, the front surfaces of the first overlapping portion A1 and the second overlapping portion A2 overlap, and the back surfaces of the second overlapping portion A2 and the third overlapping portion A3 overlap.

[0020] Five lines L1 to L5 extend from all of the corners P provided at equal intervals along the outer edge of the top surface portion 11. However, in FIG. 3A, the first line L1, fourth line L4, and fifth line L5 are omitted except for some parts to avoid complicating the drawing. The first overlapping portion A1, the second overlapping portion A2, and the third overlapping portion A3 are provided at each corner P. Furthermore, the fourth line L4 and the second line L2 extending from the corner P that is the base point of the fourth line L4 and the corner P adjacent to it in the circumferential direction define portions that do not overlap with each other when the overlapping portions A1 to A3 provided at the same corner P are folded. Additionally, a non-overlapping portion A4 is defined by the fourth line L4, the corner P that serves as the base point of the fourth line L4, and the first line L1 extending from the circumferentially adjacent corner P, where the sheets do not overlap even when the overlapping portions A1 to A3 at all corners P are folded (see the left side of FIG. 3A). This non-overlapping portion A4 is also provided for each corner P. Therefore, when viewed from the center point C of the top surface portion 11, the first overlapping portion A1, the second overlapping portion A2, the third overlapping portion A3, and the non-overlapping portion A4 are arranged in a repeated, continuous sequence in the circumferential direction. In other words, the overlapping portions A1 to A3 and the non-overlapping portion A4 are arranged alternately in the circumferential direction.

[0021] The angle α1 formed between the first line L1 and the second line L2, the angle α2 formed between the second line L2 and the third line L3, and the angle α3 formed between the third line L3 and the fourth line L4 are all equal. Specifically, each angle is 10 to 20 degrees. As this angle increases, the value of the upper outer diameter R1 / lower outer diameter R2 tends to increase. In addition, the angle α4 formed between the second line L2 and the side E of the top surface portion 11 is set to 50 to 90 degrees.

[0022] As shown in FIG. 3B, the planar shape of the outer edge of the side portion A0 is gear-shaped or saw-tooth-shaped, with the vertex P1 at the point where it contacts the second line L2 and the bottom P2 at the point where it contacts the third line L3. The circumscribing circle D of the side portion A0 contacts each of the vertices P1, which are equally spaced around the circumference. This circumscribing circle D is defined in an arc shape by the second line L2, the third line L3, the fourth line L4, and the fifth line L5, among the five lines mentioned above. The second line L2 and the fifth line L5 all pass through the vertex P1. Therefore, it can be said that the circumscribing circle D is defined in an arc shape by the second line L2, the third line L3, and the fourth line L4, which extend from the corner P that is the origin of each of the lines L1 to L5, and the second line L2, which extends from the corner P adjacent to the corner P in the circumferential direction.

[0023] As shown in Fig. 3A, when the second lines L2 are mountain fold lines and the third lines L3 are valley fold lines, the mountain fold lines and valley fold lines are alternately arranged in the circumferential direction. When the circumscribed circle D is divided into arcs as shown in Fig. 3B by the mountain fold line L2 and valley fold line L3 extending from a certain starting point (corner P) and the mountain fold line L2 extending from another starting point (corner P) adjacent to the valley fold line L3 in the circumferential direction, the length L23 of the arc AC23 divided by the mountain fold line L2 and valley fold line L3 extending from the same corner P is 35 to 50% of the length L25 of the arc AC25 divided by the two mountain fold lines L2, L2 extending from different corners P. Furthermore, when the ratio of the diameter of the circumscribing circle of the top surface 11 to the diameter of the circumscribing circle D is 1:4, if the above ratio is 40%, R1 / R2 of the cap will be 1, and at 50%, R1 / R2 will be 1.5, making it easier for the cap to withstand the axial load required. The load capacity is preferably 40N or more, and more preferably 50N or more.

[0024] Paper sheet S has a basis weight of 100 to 300 g / m 2 The base material is paper. To impart water resistance and weather resistance, the base material may be impregnated with a synthetic resin or covered with a synthetic resin sheet. The thickness of the paper is 0.15 to 0.4 mm, and the paper quality is not particularly limited and may be plain paper, inkjet paper, kraft paper, cardboard, etc. The paper may also contain inorganic substances such as calcium carbonate to the extent that it can be identified as paper.

[0025] To form the tubular portion 12, the side portion A0 of the paper sheet S configured as described above is folded in a mountain fold along the second line L2 when viewed from the back (folding so that the second line L2 is inside the tubular portion 12), and then folded along the third line L3 and side E when viewed from the back (folding so that the third line L3 and side E are outside the tubular portion 12). The second line L2 is then folded toward the fourth line L4, overlapping each other. Note that Figure 4 shows an intermediate stage of folding, and the curved portion adjacent to the second line L2 in the clockwise direction is not a crease. When the second line L2 is folded all the way toward the fourth line L4 until the curved portion is extended, the first line L1 overlaps the third line L3 (see Figure 6). By folding in this manner, an overlapping portion 13 is formed in which the second overlapping portion A2 overlaps the outside of the first overlapping portion A1, and the third overlapping portion A3 overlaps the outside of the second overlapping portion A2. In other words, the overlapping portions A1 to A3 overlap from the base end to the tip end of the side surface portion A0. When all corners P are folded in the same manner, a tubular portion 12 is formed whose upper end is closed by the top surface portion 11 and whose lower end is open. Furthermore, the overlapping portion 13 has a spiral shape that spirals from the upper end to the lower end of the tubular portion 12. In this state, as shown in FIG. 1, it can also be said that the third line L3 located at the end of the overlapping portion 13 has a spiral shape.

[0026] As shown in Fig. 2, the paper cap 10 for a dispensing container having the above-described configuration is placed on a dispensing container 1 having a push button (operating portion) 3 attached to a stem 2. Specifically, by covering the push button 3 from above, it is used as a protective cap that prevents the push button 3 from being unintentionally pressed in or tilted. In Fig. 2, the lower end of the paper cap 10 is located inside the fixing portion (bead portion) 6 between the container body 4 of the dispensing container 1 and the mountain cap 5, but it may also be configured to cover the approximately tapered shoulder portion 7 and cylindrical body portion 8 of the container body 4. For example, R1 / R2 of the paper cap 10 may be set to 1 or more, and the inner surface of the paper cap 10 and the outer surface of the body portion 8 may be fitted together (fixed by friction). 7, the barrel 8 of the container body 4 may be provided with an upper (cap-mounted) fitting cylindrical portion 8a and a cylindrical portion 8b that is continuous with the lower end of the fitting cylindrical portion 8a and has a larger diameter than the fitting cylindrical portion 8a, and the lower end of the paper cap 10 may be abutted against the cylindrical portion 8b (step). Furthermore, to ensure abutment, a groove 8c may be provided between the fitting cylindrical portion 8a and the cylindrical portion 8b.

[0027] Furthermore, if the discharge product 9, which is made by attaching a paper cap 10 to a discharge container 1, is packaged in a shrink film F (a film that shrinks when heated and adheres closely to the surface of the paper cap 10 and the discharge container 1), it is possible to prevent the paper cap 10 from coming off the discharge container 1 and also to regulate the expansion of the lower end of the tubular portion 12, which is likely to occur when an axial force is applied to the paper cap 10, thereby reliably protecting the operating part 3 even during transportation of the product, which is prone to being subjected to impacts.

[0028] [Load test] Paper caps were made using the paper sheets shown in the table below. The dimensions of the made paper caps were measured, and the pushing load (load capacity) was measured. The load capacity is the load when the made paper cap is placed inside the fixed part (bead part) of a discharge container with a valve crimped onto an aluminum container body, as shown in Figure 2, and a circular plate with a diameter of 30 mm is pressed down from the top of the cap by 5 mm at a speed of 50 mm / min.

[0029] [Table 1]

[0030] As shown in Table 1, the load-bearing capacity of Examples 1 to 6 exceeded 40N. The paper cap of Example 1 had a constricted tubular portion, and when attached to a dispensing container, the constriction was located near the bead, providing stability. On the other hand, the load-bearing capacity of Comparative Example 1 was 38N, which was less than 40N. In Comparative Example 1, the length L23 was 33.3% of the length L25. When the length L23 is 33.3% or less, the second overlapping portion A2 of a given corner P does not overlap with the second overlapping portion A2 of the corner P adjacent to that corner P in the circumferential direction. In other words, the overlapping portion 13 can only overlap a maximum of three layers. On the other hand, when the overlapping portion 13 exceeds 33.3%, for example, five layers of the overlapping portion 13 will overlap, as shown in FIG. 6. This is considered to provide sufficient strength for use as a cap using a paper substrate.

[0031] Although the above describes an embodiment of the present invention, the present invention is not limited to the above embodiment and can be modified and implemented within the scope of the present invention. For example, the second line L2 may be a valley fold and the third line L3 may be a mountain fold. Furthermore, the planar shape of the outer edge of the side portion A0 is not limited to a gear shape or a circular sawtooth shape, and various other shapes may be adopted. However, a shape in which the circumscribing circle D is a perfect circle centered on the center point C is preferable. Furthermore, the outer edge may be arc-shaped rather than straight so that the lower end of the tubular portion 12 is straight when folded, in other words, so that the outer edges of the intended overlapping portions A1 to A3 overlap each other. The top surface portion 11 is also not limited to a regular polygon and may be a perfect circle. Furthermore, printing on a paper sheet on the side or back of the paper cap can replace a POP label, package insert, etc. [Explanation of symbols]

[0032] 1 Discharge container 2 Stem 3 Push button (operation part) 4 Container body 5 Mountain Cap 6 Fixed part (bead part) 7 Shoulder 8. Torso 8a Fitting cylindrical part 8b Cylindrical part 8c Groove 9 Discharge products F Shrink Film 10 Paper cap for dispensing container 11 Top section P angle E side C center point 12 Cylinder part R1 Outer diameter of the upper end of the cylindrical part R2 Outer diameter of the bottom end of the cylindrical part 13 Overlapping section S Paper sheet A0 Side part A1 First overlapping portion A2 Second overlapping section A3 Third overlapping section A4 non-overlapping area D circumscribed circle L0: A line connecting the center point of the top surface to the corner L1 1st line L2 2nd line L3 Third Line L4 4th Line α1 Angle between the first and second lines α2 The angle between the second and third lines α3 The angle between the third and fourth lines α4 The angle between the second line and the edge of the top surface P1 Vertex P2 Valley bottom AC23 Arc bounded by the second and third lines AC25 Arc bounded by the 2nd and 5th lines L23: The length of the arc bounded by the second and third lines L25: The length of the arc bounded by the second and fifth lines

Claims

1. The top surface and The container is made of a single paper sheet having a top surface and a side surface extending from the top surface, The side surface portion has a plurality of overlapping portions, The overlapping portions overlap each other from the base end side to the tip end side of the side surface portion, thereby forming a tubular portion whose upper end is closed by the top surface portion and whose lower end is open so as to be attachable to the discharge container, the ratio of the outer diameter of the upper end of the cylindrical portion to the outer diameter of the lower end of the cylindrical portion (outer diameter of the upper end / outer diameter of the lower end) is 0.80 to 1.80; mountain fold lines and valley fold lines for overlapping the intended overlapping portions extend from a plurality of starting points provided at equal intervals along the outer edge of the top surface portion toward the tip side of the side surface portion, so that the mountain fold lines and valley fold lines are alternately arranged in the circumferential direction, When the circumscribing circle of the side surface is divided into an arc shape by mountain fold lines and valley fold lines extending from a certain starting point and mountain fold lines extending from another starting point adjacent to the valley fold lines in the circumferential direction, the length of the arc divided by the mountain fold lines and valley fold lines extending from the same starting point is 35 to 50% of the length of the arc divided by two mountain fold lines extending from different starting points, The paper protective cap for the discharge container is attached to the discharge container so as to cover the operating part of the discharge container.

2. 2. The paper protective cap for a dispensing container according to claim 1, which has an axial load capacity of 40 N or more.

3. 3. The paper protective cap for a dispensing container according to claim 1, wherein the overlapping portion formed by overlapping the intended overlapping portions is turned from the upper end of the cylindrical portion toward the lower end thereof.

4. The paper protective cap for a dispensing container according to any one of claims 1 to 3, wherein the top surface is a polygon having 8 to 16 corners.

5. A discharge product, comprising a discharge container having the paper protective cap of any one of claims 1 to 4 attached thereto and packaged in a shrink film.

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