JP7469595B2 - Protective base for beverage containers - Google Patents

Description

This invention relates to the structure of a bottom member for protecting beverage containers.

Recently, various types of portable beverage containers have been provided, in which insulated stainless steel containers are used as drink bottles or soup cups. To protect such beverage containers from damage during transportation and to make them easier to carry, portable pouches (water bottle covers) are provided for storing the beverage containers according to their shape and dimensions, and users generally carry the beverage containers in the pouches.

This portable pouch for storing beverage containers generally consists of a beverage container storage section having a cylindrical structure made of cloth, and a beverage container storage bottom section having a dish-shaped structure made of cloth that is located at the lower end of the beverage container storage section and supports the bottom of the stored beverage container. Since such a portable pouch for storing beverage containers is used for a long period of time, for example, by being carried by hand using a strap, slung over the shoulder, or even stored in a bag, it is required that it maintains its shape and is resistant to friction and impact. For this reason, the outer and inner skins are made of thick cloth materials (polyester fibers, etc.) that have relatively high strength and rigidity, and are configured to withstand long-term use. In addition, an elastic member such as a urethane pad is interposed between the outer and inner skins to protect the beverage containers from impact.

However, regardless of adults, children often drag the portable pouch containing the beverage container on the ground by holding the longer strap as they walk, and in such cases, if the pouch is made only of cloth, the friction at the bottom (corners) of the pouch can cause severe damage. For this reason, some products are offered that use a three-dimensional molded structure in which a synthetic resin material is molded into the bottom of the portable pouch. However, there is a limit to how much abrasion resistance can be improved by simply molding a synthetic resin material into a cloth bottom, and cracks can also be expected, so it is by no means sufficient.

Recently, a portable pouch has been proposed that is constructed from two different materials: a cylindrical storage body made of the above-mentioned fabric material, and a dish-shaped bottom member made of synthetic resin material that is sewn to the bottom of the storage body, and the strength of the bottom of the pouch is improved by constructing the synthetic resin bottom member from a hard resin such as polypropylene (for example, see the configuration of the portable pouch in Patent Document 1).

When this type of synthetic resin bottom structure is used in a portable pouch for storing beverage containers, the strength of the pouch bottom can be improved more effectively than when a synthetic resin material is simply molded onto a cloth bottom, and the strength and abrasion resistance problems described above are resolved to some extent.

JP 2016-137040 A

However, in the case of the conventional synthetic resin bottom members for protecting beverage containers, although they are said to be strong, they are simply molded from a single hard synthetic resin material such as polypropylene, taking into consideration the ease of attachment (sewing) to the bottom of the pouch storage body. Therefore, although they effectively improve strength compared to products in which a synthetic resin material is simply molded into the bottom of the pouch storage body, they are still insufficient in terms of abrasion resistance and shock absorption (cushioning).

In the case of beverage containers that employ the above-mentioned insulation structure (particularly the vacuum insulation structure), a vacuum sealing structure is employed for the bottom (bottom of the outer container) of the container body consisting of the inner container and the outer container (see the configuration in Figure 12), and even though it is made of metal, the bottom is not necessarily strong. Therefore, improving the strength, abrasion resistance, and shock absorption (cushioning) of the synthetic resin bottom member is important not only for the purpose of improving the durability of the portable pouch itself, but also for the purpose of improving the protective function of the beverage container.

Furthermore, beverage containers such as those described above are not limited to cases where they are stored in a portable pouch and used in that stored state, but are often removed from the portable pouch and used as a standalone beverage container in actual use. In such cases, there is no protective effect provided by the bottom member of the portable pouch, and it is conceivable that the bottom of the beverage container, which is not necessarily strong, will be placed directly on a hard ground or table surface, resulting in a strong impact. Considering such cases, it is important not only to strengthen the bottom member of the portable pouch, which is the storage member, but also to protect and strengthen the bottom of the beverage container itself.

The present invention has been made to solve such problems, and aims to provide a bottom member for protecting beverage containers which protects the bottom of a beverage container, comprising a bottomed cylindrical portion which has a tray structure corresponding to the shape of the bottom of the beverage container and which covers the bottom of the beverage container and is made of a hard synthetic resin material which is strong and difficult to break, and a grounding portion which covers the outer peripheral surface of the bottom of the bottomed cylindrical portion and is made of a thermoplastic polyurethane resin material which combines the flexible elasticity of rubber with the toughness of a hard synthetic resin material and has high impact resistance, abrasion resistance and impact absorption, and which covers the outer peripheral surface of the bottomed cylindrical portion, and which has effectively improved strength, impact absorption and abrasion resistance by giving the grounding portion a predetermined shape and molding it tightly and firmly to the bottom outer peripheral surface of the bottomed cylindrical portion.

In order to solve the above problems, the present invention is configured with the following problem-solving means:

(1) First Solution to the Problem In the present invention, as a first solution to the problem described above, a bottom member for protecting a portable beverage container is provided, which protects the bottom of the beverage container, and has a tray structure corresponding to the shape of the bottom of the beverage container, and is made of a hard synthetic resin material with high strength and resistance to cracking, and a bottomed cylindrical part covering the bottom of the beverage container, and a thermoplastic polyurethane resin material with high impact resistance, abrasion resistance , and impact absorption , which combines flexible elasticity like rubber with toughness like hard synthetic resin material, and covers the outer circumferential surface of the bottom of the bottomed cylindrical part. The grounding portion comprises a bottom wall portion covering the bottom surface of the bottomed cylindrical body portion, a large curvature radiused surface portion on the outer periphery of the bottom wall portion, and a side wall portion rising from the large curvature radiused surface portion along the side wall portion of the bottomed cylindrical body portion, and is configured by tightly and firmly molding the entire portion from the bottom wall portion covering the bottom outer periphery of the bottom wall portion to the large curvature radiused surface portion on the outer periphery of the bottom wall portion, and from the large curvature radiused surface portion to the side wall portion rising along the side wall portion of the bottomed cylindrical body portion, via molding concave and convex portions .

In such a configuration, the bottom member portion for protecting the beverage container, which protects the bottom of the portable beverage container, has a tray structure corresponding to the bottom shape of the beverage container, and is composed of two synthetic resin materials with different characteristics: a bottomed tubular portion covering the bottom of the beverage container and made of a hard synthetic resin material which is strong and difficult to break, and a ground contact portion covering the outer peripheral surface of the bottom of the bottomed tubular portion and made of a thermoplastic polyurethane resin material which combines flexible elasticity like rubber with the toughness of a hard synthetic resin material and has high impact resistance, abrasion resistance and shock absorption properties . In particular, the synthetic resin material on the ground contact portion side covering the outer peripheral surface of the bottomed tubular portion which covers the bottom of the beverage container is formed of a thermoplastic polyurethane resin material which combines flexible elasticity like rubber with the toughness of a hard synthetic resin material and has high impact resistance, abrasion resistance and shock absorption properties .

Therefore, in this configuration, the bottom of the beverage container forms a tray structure that corresponds to the bottom shape of the beverage container, and is appropriately protected by two synthetic resin materials with different properties: a bottomed cylindrical portion covering the bottom of the beverage container and made of a hard synthetic resin material that is strong and shatter-resistant , and a ground contact portion covering the outer peripheral surface of the bottom of the bottomed cylindrical portion and made of a thermoplastic polyurethane resin material that combines flexible elasticity like rubber with the toughness of a hard synthetic resin material and has high impact resistance, abrasion resistance and shock absorption.Compared to conventional bottom member configurations, the strength, impact absorption properties and abrasion resistance of the bottom are more effectively improved, and durability is greatly improved.

For example, even if the bottomed tubular portion corresponding to the bottom of the beverage container is formed from the same synthetic resin material as conventionally described above, the bottomed tubular portion can be more effectively protected by a contact portion made of a thermoplastic polyurethane resin material which combines flexible elasticity and toughness like rubber and has high impact resistance, abrasion resistance and shock absorption properties , thereby more effectively improving the strength, impact absorption and abrasion resistance of the bottom .

In addition, the use of thermoplastic polyurethane resin material with flexible elasticity like rubber in the ground contact area reduces noise when the tire touches the ground, resulting in a quieter ride.

In particular, in the above configuration, the bottomed cylindrical portion located on the inside and covering the bottom of the beverage container is formed into a saucer structure corresponding to the shape of the bottom of the beverage container, while the ground contact portion covering the outer peripheral surface of the bottomed cylindrical portion and which is likely to come into direct contact with the ground and is therefore susceptible to impact is composed of three parts: a bottom wall portion covering the bottom of the bottomed cylindrical portion, a large curvature radiused surface portion on the outer peripheral surface of the bottom wall portion, and a side wall portion rising from the large curvature radiused surface portion along the side wall of the bottomed cylindrical portion.The outer peripheral portion of the bottom wall portion, which is particularly susceptible to impact from the ground when the container is dragged, is formed into a large curvature radiused surface portion overall, making it easy to slide on uneven ground when the container is dragged and less susceptible to impact.

For this reason, in combination with the configuration in which the grounding portion is formed from a thermoplastic polyurethane resin material, which, as described above, combines the flexible elasticity of rubber with the toughness of a hard synthetic resin material, and has excellent impact resistance, abrasion resistance, and shock absorption properties, the protective function can be more effectively improved.

The grounding portion, which is made up of these three parts, is tightly and firmly molded as a single unit with the bottom outer periphery of the bottomed cylindrical portion via the molding recesses, so that the strength of the bottom member as a whole is sufficiently high.

(2) Second problem-solving means In the present invention, as a second problem-solving means for solving the above problem, the grounding portion in the first problem-solving means is molded and integrated with the bottom outer peripheral surface of the bottomed cylindrical portion by two-stage molding.

In this way, when the ground contact portion in the first problem-solving means is molded and integrated with the bottom outer peripheral surface of the bottomed tubular body portion by two-stage molding, in the first stage, a bottomed tubular body portion corresponding to the bottom of a conventional beverage container is molded using a specified synthetic resin material, and then in the second stage, the ground contact portion is firmly molded and fixed in an integrated state to the bottom outer peripheral surface of the bottomed tubular body portion using a synthetic resin material that is harder and more elastic than the synthetic resin material of the bottomed tubular body portion.

(3) Third problem-solving means In the present invention, as a third problem-solving means for solving the above-mentioned problem, the synthetic resin material forming the bottomed tubular portion in the first or second problem-solving means and the synthetic resin material forming the grounding portion are different in color from each other.

This configuration makes it possible to mold the cylindrical portion and the contact portion of the bottom member that protects the bottom of the beverage container in two colors, improving design. In addition, because they are color-coded, wear on the contact portion that comes into direct contact with the ground surface is easy to see, making it easier for users to recognize when the bottom member portion is reaching the end of its life.

(4) Fourth Problem-Solving Means The present invention provides a fourth problem-solving means for solving the above-mentioned problem, characterized in that the grounding portion in the first, second or third problem-solving means is provided with a plurality of openings at predetermined intervals in the circumferential direction.

In this way, by providing multiple openings at a specified interval in the circumferential direction in the ground contact portion of the bottom member and forming a partially hollowed-out portion, the amount of synthetic resin material used in the ground contact portion can be reduced accordingly, which can reduce product costs and make the bottom member lighter. In addition, the multiple openings can form unevenness in the circumferential direction on the ground contact surface of the ground contact portion, so that even if the ground contact surface is uneven outdoors, these can be absorbed and the base can be placed in a stable state without rattling.

(5) Fifth Problem-solving Means In the present invention, as a fifth problem-solving means for solving the above-mentioned problems, the bottom member in the first, second, third or fourth problem-solving means is provided at the bottom of the storage main body made of a cloth member, and constitutes the bottom of a portable pouch for storing beverage containers.

In this way, when a bottom member employing the configuration of the first, second, third or fourth problem-solving means is provided at the bottom of a storage body made of a fabric member and forms the bottom of a portable pouch for storing beverage containers, the strength, abrasion resistance and shock absorption properties of the bottom of the portable pouch for storing beverage containers are effectively improved, and durability is greatly improved.

(6) Sixth problem-solving means In the present invention, as a sixth problem-solving means for solving the above problem, the bottom member in the first, second or third problem-solving means is provided at the bottom of the beverage container body and constitutes the bottom of the beverage container body.

In this way, when a bottom member adopting the configuration of the first, second, third or fourth problem-solving means is provided at the bottom of a beverage container body and constitutes the bottom of the beverage container body, the strength, abrasion resistance and shock absorption properties of the bottom of the beverage container are effectively improved, and durability is greatly improved.

As a result, according to the present invention, the strength, shock absorption, and abrasion resistance of the synthetic resin bottom member for protecting the beverage container, which protects the bottom of the beverage container via the portable pouch that has a cloth storage body and stores and can store and remove beverage containers freely, and the synthetic resin bottom member that is directly fitted integrally to the bottom of the beverage container body to protect the beverage container body, are each effectively improved, and the durability of the portable pouch for storing beverage containers and the beverage containers themselves is increased.

1 is a perspective view showing the configuration of a portable pouch for storing beverage containers according to a first embodiment of the present invention, which is configured by adopting a bottom member for protecting beverage containers according to the present invention, in a beverage container-storing state. FIG. FIG. 2 is a perspective view showing the configuration of the portable pouch for storing a beverage container in a state where a beverage container is not stored therein. 4 is a perspective view showing an example of a beverage container stored in the portable pouch for storing beverage containers according to the embodiment of the present invention; FIG. 10 is a perspective view showing the configuration of the upper surface side of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers according to the embodiment of the present invention; FIG. 10 is a perspective view showing a configuration of the lower surface side of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers according to the embodiment of the present invention; FIG. 13 is a plan view showing the configuration of the upper surface side of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers. FIG. 13 is a bottom view showing the configuration of the bottom side of the beverage container protection bottom member in the portable pouch for storing beverage containers. FIG. 10 is a front view showing a configuration of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers according to the embodiment of the present invention; FIG. 8A is a cross-sectional view (A-A in FIG. 8) showing the configuration of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers. 10 is a side view showing a configuration of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers according to the embodiment of the present invention; FIG. 9A is a cross-sectional view (BB in FIG. 9) showing the configuration of a bottom member for protecting beverage containers in the portable pouch for storing beverage containers. 4 is an enlarged cross-sectional view of a main portion showing a configuration of an attachment portion of a bottom member for protecting beverage containers to a storage body in the portable pouch for storing beverage containers according to the embodiment of the present invention; FIG. 1 is a perspective view showing the configuration of a bottom member for protecting beverage containers according to a second embodiment of the present invention, which is configured by adopting a bottom member for protecting beverage containers according to the present invention, in a state in which the bottom member is attached to a beverage container. FIG.

The following provides a detailed explanation of the configuration and function of a portable pouch for storing beverage containers according to a first embodiment of the present invention, which is configured using a bottom member for protecting beverage containers according to the present invention, and the configuration and function of a bottom member for protecting beverage containers according to a second embodiment of the present invention, which is configured using a bottom member for protecting beverage containers according to the present invention, with reference to the attached Figures 1 to 13.

(1) The configuration and operation of a portable pouch for storing beverage containers according to a first embodiment of the present invention, which is configured by using a bottom member for protecting beverage containers according to the present invention (FIGS. 1 to 12)
The bottom member for protecting beverage containers in this embodiment 1 is provided at the bottom of a portable pouch for storing beverage containers (hereinafter simply referred to as the portable pouch) and is configured to protect the beverage containers together with the portable pouch.

Figure 1 shows the portable pouch with a beverage container 3 stored in the beverage container storage body 1, and Figure 2 shows the portable pouch with the beverage container 3 removed from the beverage container storage body 1. The portable pouch in this embodiment 1 is basically composed of a cylindrical beverage container storage body 1 made of a fabric member and extending vertically, and a bottom member 2 for protecting the beverage container, which is provided on the lower end 1a side of the beverage container storage body 1 and is made of two types of synthetic resin material described below.

As shown in FIG. 12, the cylindrical beverage container storage body 1 is made of three members, an outer skin 11, a middle member 12, and an inner skin 13, and is formed into a cylindrical body of approximately equal diameter from the bottom end 1a to the top end 1b. At the periphery of the opening on the top end 1b side, for example, a band-shaped sewing tape (such as polypropylene tape) of a specified width is used, and the sewing tape is folded back into an inverted U shape. The top ends (top ends of the overlapping parts) of the outer skin 11, middle member 12, and inner skin 13 are sandwiched between the two inner and outer folded pieces, and the top and bottom are sewn together to form a reinforcing band 15 of a specified vertical width.

The outer skin 11 and inner skin 13 that form the beverage container storage body 1 are made of, for example, relatively rigid, water-repellent polyester fibers, etc., and are highly water-resistant, while the inner member 12 is made of, for example, a slightly thick elastic urethane pad, etc., so as to maintain the rigidity (shape) of the beverage container storage body 1 and to effectively absorb and mitigate impacts on the side of the stored beverage container 3. And, for example, a handle-type strap 4 of a predetermined length is provided from the upper end 1b side to the lower side of the beverage container storage body 1 of the same structure.

The beverage container 3 is inserted into the beverage container storage body 1 of the portable pouch as shown in FIG. 1, and is stored and held portable with the stopper body 33 and lid 34 at the top end facing the outside through the opening of the beverage container storage body 1.

As shown in FIG. 3, the beverage container 3 is made up of a cylindrical container body 31 with a bottom, a drinking spout member 32 having a cylindrical spout (not visible) screwed and fixed to the upper opening of the container body 31, a stopper body 33 which is fitted and integrated with the upper side of the drinking spout member 32 with the spout so that the spout penetrates upward, and a lid 34 which is attached to the top of the stopper body 33 via a hinge portion 33 so that it can be opened and closed vertically, and which covers the upper part of the spout when closed and is locked and maintained in the closed state by a locking mechanism equipped with a lock lever 35 for unlocking.

As shown in FIG. 12, the container body 31 of the beverage container 3 is made up of two metal containers, a metal inner container 311a and a metal outer container 311b, with a vacuum insulation space 311c formed between them. A vacuum seal 311d is provided on the bottom 31a side of the container body 31, specifically on the bottom of the outer container 311b, to form the vacuum insulation space 311c within the vacuum chamber.

The bottom member 2 for protecting beverage containers, which is provided on the lower end 1b side of the beverage container storage body 1, is composed of two parts: a shallow, dish-shaped cylindrical part 21 with a bottom, and a grounding part (reinforcement part) 22 that is integrally provided on the bottom surface side of the cylindrical part 21.

The bottomed cylindrical section 21 has a tray structure that corresponds to the bottom shape of the beverage container 3 to be stored, and a thin wall section 21b is formed on the upper side of the side wall section of the cylindrical section main body 21a for sewing and connecting the lower end section 1a side of the beverage container storage section main body 1. This thin wall section 21b is formed by cutting away a predetermined vertical width portion on the outer surface side of the upper side wall section of the cylindrical section main body 21a, thereby forming a step section of a predetermined dimension on the outer surface side.

The entire bottomed tubular part 21 is molded using a hard synthetic resin material that is strong, sewable, and difficult to crack, such as a blend of polyethylene (PE) and polypropylene (PP) in a specified ratio. Then, a specified number of molded grooves (engagement recesses) a, a..., a, a... are provided on the side wall and bottom wall of the tubular part main body 21a of the bottomed tubular part 21 for molding and integrating the grounding part 22 described below, as shown in Figures 9 and 11, for example.

On the other hand, the grounding portion 22 is formed integrally with the bottom of the cylindrical body 21a, for example, by using thermoplastic polyurethane resin (TPU) and molding it in two stages, as shown in, for example, Figures 4 to 11. The grounding portion 22 is composed of a bottom wall portion covering the bottom surface of the cylindrical body 21a, and a side wall portion rising from the large curvature of the outer periphery of the bottom wall portion along the vertical side wall portion of the cylindrical body 21a, and the upper end 22c portion of the side wall portion is lower on both the front and rear sides of the outer periphery of the side wall portion near the bottom of the cylindrical body 21a and higher on both the left and right sides, and is gently continuous in the circumferential direction in a wave-like shape as a whole, and the upper end 22c portion of the side wall portion is tightly engaged with the molded grooves a, a portions of the cylindrical body 21a of the corresponding shape, and is molded and integrated extremely firmly. For this reason, a small-diameter convex portion 21c corresponding to the upper end 22c of the side wall portion is formed on the inside of the side wall portion of the cylindrical body 21a.

The grounding portion 22 is also tightly fitted to the corresponding grooves a, a on the bottom surface of the cylindrical body 21a, and is molded and integrated into the grounding portion 22 very firmly. The symbols b, b..., b, b... in Figs. 9 and 11 indicate the molded protrusions on the inner surface of the side wall and the upper surface of the bottom wall of the grounding portion 22 that are tightly fitted to the molded grooves a, a..., a, a....

In this embodiment, the upper end portion of the side wall of the bottomed cylindrical portion 21, which corresponds to the lower end 1a of the beverage container storage body 1, has a thickness (wall thickness) thinner than that of the lower cylindrical portion 21a, as described above, to form a sewable thin wall portion 21b through which the needle of an industrial sewing machine can pass, and the sewable thin wall portion 21b is sewn to the lower portion of the beverage container storage body 1 at a predetermined height position via the synthetic resin sewing tape 14 as described above.

The stitching between the side wall of the bottomed tubular body 21 and the lower part of the beverage container storage body 1 is structured as shown in detail in the enlarged cross-sectional view of FIG. 12. That is, the upper end side of the side wall of the bottomed tubular body 21 is formed into a thin wall 21b thinner than the lower tubular body body 21a by thinning the outer peripheral surface of the thin wall 21b to a predetermined thickness. The synthetic resin sewing tape (ribbon tape) 14 made of polypropylene or other such material is folded back in a U-shape in both the inner and outer directions at the center of the width of the thin wall 21b, and the folded back inner and outer side pieces 14a, 14b are sewn to the thin wall 21b at the first and second seams 16 and 18 at the lower end to form a single piece.

In this case, at the first seam 16 on the upper side, the beverage container storage body 1 is also sewn together, but at the second seam 18 on the lower side, only the inner and outer side pieces 14a, 14b of the sewing tape (ribbon-shaped tape) 14 are sewn to the thin wall portion 21b.

The synthetic resin sewing tape 14 is relatively thick and relatively rigid. When it is firmly sewn together with the thin wall portion 21b, the step on the inside of the thin wall portion 21b (the step caused by cutting) is eliminated, and a side wall surface is formed on the outside of the thin wall portion 21b that is flush with the side wall surface of the lower side cylinder body 21a.

As described above, the beverage container storage body 1 has a triple structure of an outer skin 11, an inner member (urethane pad) 12, and an inner skin 13, and the lower end 1a of the inner skin 13 is sewn to the lower end of the outer skin 11 at a second seam 17, thereby binding the inner member 12 together with the outer skin 11.

The bottom wall and side wall of the ground contact body 22a are continuous and flush with each other, and are molded to have approximately the same thickness overall, but in the semicircular regions with large curvature from the bottom wall outer periphery to the side wall on both the left and right sides, three sets of openings (hollowed-out sections) 22b, 22b, 22b, 22b, 22b, 22b are provided at predetermined intervals in the circumferential direction without thick molded walls, as shown in Figures 4, 5, and 7 to 11. These three sets of openings 22b, 22b, 22b, 22b, 22b, 22b, 22b are planar inverted trapezoids whose opening width gradually increases from the bottom wall side to the side wall side (in the radial direction), as is clear from Figure 7, for example.

The opening edge (inner edge) of each opening 22b, 22b, 22b, 22b, 22b, 22b is formed into a tapered surface 22e with a gentle inclination angle in which the opening area expands from the inside to the outside, and the inside is in secure contact (contact surface) with the bottom wall surface and side wall surface of the cylindrical body 21a over a wide area, and when the portable pouch containing the beverage container 3 is placed on the ground (especially when it is placed on a table or the like in a state where it is subjected to a strong impact), the pressure acting on the molded wall portion of the specified thickness (parts other than the openings 22b, 22b, 22b, 22b, 22b, 22b) is effectively dispersed and cushioned in an oblique direction toward the bottom wall surface and side wall surface of the cylindrical body 21a.

In addition, when the opening edge (inner edge) of each opening 22b, 22b, 22b, 22b, 22b, 22b is formed into a tapered surface 22d in which the opening area expands from the inside to the outside, even when the portable pouch containing the beverage container 3 is dragged across a table or road, the engagement force with the opening edge of the openings 22b, 22b, 22b, 22b, 22b, 22b is small and the opening slides smoothly, increasing the durability of the openings (less damage). In addition, dirt is less likely to accumulate and can be easily wiped off, making the pouch easy to maintain.

In addition, in the configuration of this embodiment, a plurality of openings 22b, 22b, 22b, 22b, 22b, 22b are provided in the circumferential direction of the grounding portion main body 22a, and further, the predetermined radius area A of the central portion 22e is recessed upward so that the predetermined radius area A of the central portion 22e of the grounding portion main body 22a does not directly contact the table surface or the like when the portable pouch is in the grounded state. As a result, in this configuration, even if the portable pouch is used for a long period of time, scratches, etc. will only occur in the convex portion with a large curvature (radial arc surface portion) between the openings 22b, 22b, 22b, 22b, 22b, 22b that are directly grounded out of the entire bottom surface of the grounding portion main body 22a (the outer portion of the A region of the central portion 22e is also gently recessed upward to a certain extent, so it does not come into contact with the ground), and scratches on the bottom surface will be almost inconspicuous.

In addition, by using convex curved surfaces with a large radial curvature that are partially arranged at a predetermined interval in the circumferential direction to support the grounded state, not only is the degree of damage caused by wear low, but the portable pouch containing the beverage container can be easily and stably grounded without any rattling even when placed on uneven ground such as outdoors.

In addition, in this embodiment, the ground contact portion main body 22a is made of, for example, thermoplastic polyurethane resin (TPU), and is formed integrally with the bottom of the cylindrical portion main body 21a by two-stage molding, as shown in Figures 4 to 11. Thermoplastic polyurethane resin (TPU) is a polymeric compound that combines the flexible elasticity of rubber with the toughness of hard plastic, and has very high impact resistance and abrasion resistance, as well as excellent rubber elasticity and flexibility and a high vibration-proofing effect. It also has excellent water resistance and cold resistance.

Therefore, the ground contact body 22a having the above-mentioned predetermined molded thickness is far superior in impact resistance and abrasion resistance to the bottomed tubular body 21a made of a hard synthetic resin material that is a blend of polyethylene (PE) and polypropylene (PP), which is strong, sewable, and difficult to break, and also exhibits cushioning properties like hard rubber. As a result, durability is greatly improved compared to conventional hard plastics made by blending polyethylene (PE) and polypropylene (PP). In addition, since it has excellent shock absorption (damping properties), it is also quiet when touching the ground.

In addition, in this embodiment, the grounding portion main body 22a is integrated with the bottom of the tubular body main body 21a by two-stage molding. In other words, the bottom member 2 for protecting beverage containers in this embodiment is made up of two parts: a bottomed tubular body 21 that directly houses and protects the bottom 3a of the beverage container 3, and a grounding portion 22 that protects the bottom of the bottomed tubular body 21, and the bottomed tubular body 21 and the grounding portion 22 are made of two different types of synthetic resin material.

This makes it possible to change the colors of the tubular body portion 21 and the ground portion 22 of the base member 2 (for example, blue for the tubular body portion 21 and red for the ground portion 22), greatly expanding the variety of portable pouch designs. In addition, if the tubular body portion 21 and the ground portion 22 are color-coded, the user can easily recognize the state and level of wear of the ground portion 22.

(2) Configuration and operation of a bottom member for protecting beverage containers according to a second embodiment of the present invention (FIG. 13)
The bottom member for protecting beverage containers in this embodiment 2 does not use a portable pouch for storing beverage containers as in the above-mentioned embodiment 1, but is provided by directly molding and integrating a bottom member 2 having a similar configuration to that of the above-mentioned embodiment 1 onto a bottom 3a portion of a beverage container 3 similar to that of the above-mentioned embodiment 1. Therefore, unlike the above-mentioned embodiment 1, a thin wall portion 21b for sewing is not provided on the upper portion of the side wall portion of the cylindrical body main body 21a, and the thickness of the side wall portion is constant throughout from the lower end to the upper end.

Even with this configuration, it is possible to effectively protect the bottom 3a of the beverage container 3 by taking advantage of the high strength, abrasion resistance, high impact resistance, and high cushioning of the grounding portion 22 of the bottom member 2 in the configuration of embodiment 1 above, and it functions effectively.

In other words, a similar beverage container 3 is not necessarily used while in a portable pouch, but is often taken out of the portable pouch for use. In such a case, it is conceivable that the beverage container 3 body may be carelessly placed on a table or the like during use, resulting in a strong impact. Even in such a case, if a bottom member 2 similar to that described above is provided on the bottom 31a of the container body 31 of the beverage container 3 as in this embodiment 2, the impact when the beverage container 3 touches the ground is effectively absorbed and mitigated, the bottom 31a of the beverage container body 31 having the vacuum seal portion 311d described above is effectively protected, and quietness when the beverage container 3 touches the ground is ensured.

1 is a beverage container storage body, 2 is a bottom member, 3 is a beverage container, 21 is a bottomed cylindrical body, 21a is a bottomed cylindrical body body, 21b is a thin wall part, 22 is a ground contact part, 22a is a ground contact part body, and 22b is an opening part.

Claims (6)

A bottom member for protecting a portable beverage container, comprising:
A bottomed cylindrical body portion having a tray structure corresponding to the bottom shape of the beverage container and covering the bottom of the beverage container, the bottomed cylindrical body portion being made of a hard synthetic resin material having high strength and being difficult to break;
a ground contact portion covering an outer circumferential surface of a bottom portion of the bottomed cylindrical portion and made of a thermoplastic polyurethane resin material having both flexible elasticity like rubber and toughness like a hard synthetic resin material , and having high impact resistance, abrasion resistance, and impact absorption properties ;
the grounding portion comprises a bottom wall portion covering the bottom surface of the bottomed cylindrical portion, a rounded surface portion having a large curvature on the outer periphery of the bottom wall portion, and a side wall portion rising from the rounded surface portion having a large curvature along a side wall portion of the bottomed cylindrical portion,
The bottom wall covering the outer circumferential surface of the bottom of the cylindrical body with a bottom, the large curvature radius of the outer circumferential surface of the bottom wall, and the large curvature radius of the outer circumferential surface of the bottom wall to the side wall rising along the side wall of the bottomed cylindrical body are tightly and firmly molded together via a molding concave-convex portion .
A base member for protecting beverage containers. The grounding portion is molded and integrated with the outer circumferential surface of the bottom of the bottomed cylindrical portion by two-stage molding.
2. The bottom member for protecting a beverage container according to claim 1. The synthetic resin material forming the bottomed cylindrical portion and the synthetic resin material forming the grounding portion are different in color from each other.
3. A bottom member for protecting beverage containers according to claim 1 or 2. The ground contact portion is provided with a plurality of openings at predetermined intervals in the circumferential direction.
4. A bottom member for protecting beverage containers according to claim 1, 2 or 3. The bottom member is provided at the bottom of the storage body made of a fabric member and constitutes the bottom of the portable pouch for storing beverage containers.
5. A bottom member for protecting beverage containers according to claim 1, 2, 3 or 4. The bottom member is provided at the bottom of the beverage container body and constitutes the bottom of the beverage container body.
5. A bottom member for protecting beverage containers according to claim 1, 2, 3 or 4.

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