JP7373708B1 - bag closure - Google Patents

Abstract

An object of the present invention is to provide a bag closing tool that can be easily operated while feeling that the bag is being closed by the touch of the hand, and is also environmentally friendly. [Solution] The cylinder body includes a core body that can be inserted into the hollow of the cylinder body, and the cylinder body has a slit provided along the longitudinal direction, and one end and the other end in the longitudinal direction of the cylinder body. A first region and a second region are formed on the outer surface of the core from one end in the longitudinal direction of the core. They are formed alternately toward the other end, with the surface height of the second region being higher than the surface height of the first region. [Selection diagram] Figure 1

Description

The present invention relates to a closure for closing an opening in a bag.

BACKGROUND ART Conventionally, some foods such as sweets, dried fruits, and powders, as well as small items such as household goods and office supplies, are stored in bags. These are not necessarily all consumed upon opening. However, if the bag with remaining contents is left unsealed, the contents inside the bag may deteriorate or be scattered. Depending on the bag, a synthetic resin fastener is used at the opening of the bag so that the bag can be closed again after being opened, thereby preventing the stored items from deteriorating or being scattered. On the other hand, bags without zippers are often used.

Therefore, a closure device for closing the opening of a bag without a zipper has been considered. Patent Document 1 describes a tube located outside the rod, a holding space formed between the rod and the tube so that the pack is coupled thereto, and a holding space formed in the longitudinal direction of the tube. In the pack sealing device, the rod has a triangular cross-sectional shape, and one corner of the rod is in contact with the notch. The cross-sectional shape of the tube body is circular, and a bent part is formed at the tip of the rod body, which is bent toward the notch side.A horizontal part extends from the tip of the bent part, and a curved part is formed at the tip of the horizontal part. A pack closure device is disclosed that is formed with a protrusion that is shaped or semicircular in cross section. Patent Document 2 discloses a sealing device attached to the vicinity of the opening of a bag, the sealing device including a first cylindrical body and a longitudinal direction disposed around the first cylindrical body. Disclosed is a closure for a bag opening characterized by comprising: a second cylindrical body having a notch formed therein;

Patent No. 3990425 Utility model registration No. 3216039

In all of the above-mentioned closures, the user inserts a rod or cylinder as a core into the cylinder, and the area near the opening of the bag is sandwiched between the cylinder and the core. will be closed. Bag closures with such a structure are used in various places where food and small items are handled, including homes and workplaces. Therefore, the users of the bag closure include the elderly and children. However, for users such as elderly people and children who have weak fingertips, it is not easy to close the bag by handling the elongated cylinder or core. On the other hand, if the closing operation is too smooth, the user may not notice even if the closing is insufficient, or may end up redoing the closing operation because he or she is worried about whether the closing was sufficient.

Additionally, conventional closures are typically made of synthetic resins such as polypropylene. However, from the viewpoint of environmental conservation, in recent years there has been a strong demand for the use of materials that can replace synthetic resins even in bag closures.

An object of the present invention is to provide a bag closing tool that can be easily operated while feeling that the bag is being closed by the touch of the hand, and is also environmentally friendly.

The present invention includes a cylindrical body and a core body that can be inserted into the hollow of the cylindrical body, and the cylindrical body has a slit provided along the longitudinal direction, and one end and the other end in the longitudinal direction of the cylindrical body. The outer surface of the core has a first region and a second region extending from one end in the longitudinal direction of the core. The closure of the bag is alternately formed towards the other end, the surface height of the second region being higher than the surface height of the first region. The second region of the outer surface of the core is preferably formed in a spiral shape from one end to the other end in the longitudinal direction of the core.

In the present invention, it is preferable that the cylinder and/or the core have biodegradability. In the present invention, it is preferable that the cylinder and/or the core be selected from one or more of a paper tube having multiple layers, a cellulose molded product, and a biodegradable plastic molded product.

The present invention allows users to easily close a bag regardless of the strength of their fingertips or their dominant hand, while feeling the closed state of the bag through the touch of their hands. In addition, the present invention makes effective use of resources and contributes to reducing the amount of plastic waste even after disposal.

FIG. 1 is a perspective view showing one embodiment of the present invention. FIG. 2 is a perspective view showing one embodiment of the cylindrical body of the present invention. FIG. 1 is a perspective view showing one embodiment of the core of the present invention. FIG. 7 is a plan view showing another embodiment of the cylindrical body of the present invention. It is a front view showing another embodiment of the cylinder of the present invention. FIG. 2 is a side view showing one embodiment of the cylindrical body of the present invention. FIG. 2 is a side view showing one embodiment of the core of the present invention. FIG. 1 is a sectional view showing one embodiment of the present invention. FIG. 3 is a diagram illustrating a state in which the opening of the bag is closed using one embodiment of the present invention.

The present invention will be explained using FIGS. 1 to 9. In FIG. 1, 10 is a closure, 20 is a cylinder, and 30 is a core. As shown in FIGS. 2, 4, 5, and 6, the cylindrical body 20 is provided with a slit 22 along its longitudinal direction. Furthermore, notches 23 and 24 that are continuous with the narrow gap 22 are provided at one end and the other end in the longitudinal direction of the cylindrical body 20. 21 is a hollow part of the cylinder 20 formed by the smooth inner surface of the cylinder 20.

FIG. 9 is a diagram showing a state in which the opening of the bag is closed using the present invention. To close the bag using the present invention, the core 30 is first placed in the intermediate area between the opening area P2 including the opening P1 of the bag and the storage area P3. Next, the opening area P2 of the bag is tilted toward the storage area P3 so that the core body 30 is on the inside. As a result, the intermediate region of the bag surrounds the outer surface of the core 30, and the opening region P2 and storage region P3 of the bag are placed in an overlapping state. In this state, the intermediate region of the bag and the core 30 are inserted into the hollow 21 of the cylinder 20. Thereby, the present invention can close the opening of the bag. In the present invention, the outer surface of the core 30 or the cylinder 20 refers to the outer surface of the core 30 or the cylinder 20 that appears in the longitudinal direction, unless otherwise specified.

In the present invention, when not in use, the gap between the narrow gaps 22 of the cylinder body 20 and the gap between the inner surface of the cylinder body 20 and the outer surface of the core body 30 are extremely small or completely absent. However, the cylindrical body 20 of the present invention has enough rigidity to allow slight deformation. Therefore, in the present invention, by inserting the core body 30 with the bag attached into the hollow 21 through the notches 23 and 24 of the cylinder body 20, the core body 30 is inserted into the cylinder body 20 by the amount necessary to insert the core body 30 into the cylinder body 20. , the interval between the narrow gaps 22 of the cylinder body 20 can be expanded. Thereby, in the present invention, the core body 30 can be inserted into the hollow 21 of the cylindrical body 20, which has become slightly wider, and the bag body can be closed.

The spacing between the slits 22 of the cylindrical body 20 shown in FIGS. 2, 4, and 6 is not limited as long as the opening area P2 and storage area P3 of the bag can be inserted in an overlapping state. , preferably 0.30 mm or more and 1.00 mm or less, more preferably 0.50 mm or more and 0.80 mm or less. If the interval between the narrow gaps 22 is too large relative to the thickness of the portion where the opening area P2 and the storage area P3 of the bag overlap, the overlap between the opening area P2 and the storage area P3 of the bag will tend to widen.

As shown in FIGS. 2, 4, and 5, the cylindrical body 20 has notches 23 and 24 continuous with the slit 22 at one end and the other end in the longitudinal direction. This makes it easier to insert the core body 30 with the bag attached into the hollow 21 of the cylinder body 20. The cutout of the cylindrical body 20 may be provided at either one end or the other end of the cylindrical body 20, but preferably it is provided at both ends. Accordingly, in the present invention, the core body 30 can be easily inserted from either end of the cylinder body 20. Therefore, the present invention is easy to use whether the user is right-handed or left-handed.

The notches 23 and 24 are continuous with the slit 22, and each has a slope such that the notched portion becomes larger from the slit side to the end side of the cylindrical body 20. The larger the slope of the notches 23 and 24, the easier it is to insert the core 30 with the bag attached into the hollow 21 of the cylinder 20. On the other hand, if the slopes of the notches 23 and 24 become too large, the opening area P2 of the bag near the notch and the storage area P3 overlap after the core 30 with the bag attached is inserted into the cylinder 20. becomes easier to spread. Such a bulky bag hinders the storage property and aesthetic appearance of the bag in a storage location such as a shelf. Therefore, in the front view of the cylindrical body 20 arranged so that the slit 22 is directly above the cylindrical body 20 shown in FIG. The angle is preferably 7° or more and 9° or less, more preferably 7° or more and 9° or less.

As shown in FIGS. 3, 7, and 8, the outer surface of the core 30 has a first region 31 and a second region 32 extending from one end in the longitudinal direction of the core 30 to the other. The second regions 32 are formed alternately toward the ends, and the surface height of the second regions 32 is higher than the surface height of the first regions 31. It is preferable that two or more first regions 31 and two or more second regions 32 are formed along the longitudinal direction of the core body 30, and more preferably four or more.

In the present invention, the surface height H1 of the first region 31 of the core body 30 refers to the shortest distance from an arbitrarily selected point in the first region 31 of the core body 30 to the axis X1 of the core body 30. . When the surface height H1 of the first region 31 of the core body 30 is illustrated using FIG. 7 when the core body 30 is cylindrical or cylindrical as shown in FIG. It can be explained as the distance from the selected point S1 of the first region 31 of the core body 30 to the axis X1 on the normal line of the selected point S1 of the first region 31.

In the present invention, the surface height H2 of the second region 32 of the core body 30 refers to the surface height H2 of the second region 32 of the core body 30 that is adjacent to the first region 31 that includes the selected point where the surface height H1 was determined. This refers to the shortest distance from any selected point within the second region 32 to the axis X1 of the core body 30. When the surface height H2 of the second region 32 of the core body 30 is illustrated using FIG. 7 when the core body 30 is cylindrical or cylindrical as shown in FIG. It can be explained as the distance from the selected point S2 of the second region 32 of the core body 30 to the axis X1 on the normal line of the selected point S2 of the second region 32.

The surface height H1 of the first region 31 is measured based on an arbitrary selected point. The present invention provides a core body in which the surface height H1 of the first region 31 is the same no matter which selected point is measured, and a core body in which the surface height H1 of the first region 31 is different for each selected point. may also be used. The same applies to the surface height H2 of the second region 32. In the present invention, the surface height of the second region 32 of the core body 30 is higher than the surface height of the first region 31 means the minimum surface height H2 of any second region of the core body 30. This means that the value is greater than the maximum value of the surface height H1 of the first region adjacent to the second region. In other words, the core body 30 of the present invention has an outer surface in which the first region 31 is recessed relative to the second region 32.

In addition, in the present invention in which two or more first regions and two or more second regions are formed, an arbitrary second region that has obtained the minimum value of the surface height H2 and a first region that is not adjacent to the second region. The surface heights of the regions are not compared with each other. However, a first area that is not adjacent to the second area is also compared with another second area that is adjacent to the first area, and the surface height of the other second area is the same as that of the first area. Higher than the surface height of the area.

As shown in FIG. 8, the surface height H2 of the second region 32 is very slightly higher than the surface height H1 of the first region 31, so the outer surface of the core body 30 is not flat. However, the outer surface of the core 30 of the present invention maintains such smoothness that the core 30 can be easily inserted into the hollow 21 of the cylindrical body 20 even if the force of the user's fingertips is weak.

The first regions 31 and the second regions 32 formed in the core 30 of the present invention are formed alternately from one end to the other end in the longitudinal direction of the core 30. Since the surface height H2 of the second region 32 is higher than the surface height H1 of the first region 31, when the core body 30 is inserted into the hollow 21 of the cylinder body 20, the inner surface of the cylinder body 20 and the core body The distance from the outer surface of 30 varies along the longitudinal direction. That is, the distance is wide in the opposing region between the inner surface of the cylinder 20 and the first region 31 of the core 30, and relatively wide in the opposing region between the inner surface of the cylinder 20 and the second region 32 of the core 30. narrow. As a result, the present invention generates a slight resistance when the cylinder 30 is inserted into the hollow 21 of the cylinder 20. Therefore, since such minute resistance is transmitted to the user's hand, the user can intuit that the bag body is held between the core body 30 and the cylinder body 20. That is, the present invention provides a closure device that allows the user to easily perform the closing operation while feeling the sensation of the bag being closed.

The difference between the surface height H1 of the first region 31 and the surface height H2 of the second region 32 of the core body 30 is preferably 0.10 mm or more and 0.30 mm or less, more preferably 0.10 mm or more and 0.20 mm or less. be. The present invention provides a region where the inner surface of the cylinder 20 and the outer surface of the first region 31 of the core 30 face each other, and a region where the inner surface of the cylinder 20 and the outer surface of the second region 32 of the core 30 face each other. The state in which the bag attached to the core body 30 is held differs slightly depending on the area where the bags are opposed to each other. If the difference between the surface heights H1 and H2 of the mutual areas is too small, the change in the sandwiched state of the bag will be small, and the user will not feel that the bag is closed in his/her hand while inserting the core 30. It's hard to convey. On the other hand, a case where the difference from the surface height H2 of the second region 32 becomes too large is when the surface height H1 of the first region 31 is too low. In that case, since the distance between the inner surface of the cylinder 20 and the first region 31 of the core body 30 is large, the sandwiching state of the bag in the opposing region becomes weak. As a result, the closure properties of the bag become weaker.

As an example of a mode in which the first region 31 and the second region 32 of the present invention are formed alternately, the first region 31 and the second region 32 surrounding the lateral direction of the core body 30 are The strip-shaped first regions 31 and the second regions 32 are formed alternately along the longitudinal direction in a spiral shape from one end to the other end in the longitudinal direction of the core body 30. In addition, examples include those in which the first region 31 and the second region 32 are formed in a lattice shape. As a preferable example, the second region 32 is provided in a spiral shape from the first end toward the second end in the longitudinal direction of the core body 30. Note that the surface interposed between the first region 31 and the second region 32 may be provided substantially perpendicular to the first region 32, and may be inclined from the first region 31 to the second region 32. You may do so. Further, the corner formed by the intervening surface and the first region 31 or the second region 32 may be rounded.

The second regions 32 of the core body 30 are preferably formed to be evenly distributed on the outer surface of the core body 30. The ratio of the total area of the second region 32 to the outer surface of the core body 30 is preferably 8.00% or more and 25.00% or less, preferably 9.00% or more and 20.00% or less, and more preferably 10.00% or more and 15.00% or less. If the ratio of the total area of the second region 32 of the core body 30 is too small or too large, there is less chance of a change in the pinching state of the bag, so that the bag is closed in the user's hand. It is difficult to convey feelings.

In addition, in the present invention, as shown in FIGS. 1, 2, 6, and 8, the outer surface of the cylindrical body 20 also has a first region 25 and a second region 26, similar to the core body 30. are formed alternately from one end to the other end in the longitudinal direction of the cylinder 20, and the surface height of the second region 26 of the cylinder 20 is higher than the surface height of the first region 25. It is also preferable that it is high. Thereby, the present invention has an effect of preventing the user's hand from slipping on the outer surface of the cylinder 20.

The surface height H3 of the first region 25 of the cylinder 20 is the shortest distance from an arbitrary selected point in the first region 25 of the cylinder 20 to the axis X2 of the cylinder 20. The surface height H4 of the second region 26 of the cylindrical body 20 is an arbitrary value selected in the second region 26 adjacent to the first region 25 including the selected point where the surface height H3 of the cylindrical body 20 was obtained. This is the shortest distance from the point to the axis X2 of the cylinder 20.

The surface height H3 of the first region 25 and the surface height H4 of the second region 26 of the cylinder 20 in the case of a cylindrical shape as shown in FIG. 2 are illustrated using FIG. The surface height H3 of the region 25 is explained as the distance from the selected point S3 of the first region 25 of the cylinder 20 to the axis X2 on the normal to the selected point S3 of the first region 25 of the cylinder 20. can. The surface height H4 of the second region 26 is the distance from the selected point S4 of the second region 26 of the cylinder 20 to the axis X2 on the normal to the selected point S4 of the second region 26 of the cylinder 20. It can be explained as follows. A detailed explanation of the first region 25 and the second region 26 of the cylinder body 20 is the same as that of the first region 31 and the second region 32 of the core body 30, and therefore will be omitted.

The basic shape of the cylinder 20 may be a cylinder including an elliptical cylinder, a polygonal cylinder such as a triangular cylinder or a square cylinder, or a cylinder whose top and bottom surfaces are drop-shaped. The basic shape of the core body 30 is a cylinder including an elliptical cylinder, a polygonal cylinder, a cylinder with a drop-shaped top and bottom, a cylinder including an elliptic cylinder, a polygonal cylinder such as a triangular prism, a square prism, and a drop-shaped top and bottom. Any type of columnar body may be used. Although the basic shapes of the cylindrical body 20 and the core body 30 can be freely combined, it is preferable that they be generally similar from the viewpoint of generating slight resistance while maintaining ease of insertion. For example, if the cylinder is a cylinder, a cylinder or a cylinder is selected as the core.

It is preferable that the materials used for the cylinder body 20 and the core body 30 of the present invention are both biodegradable, but materials in which either one is biodegradable are also included. In the present invention, "biodegradable" means that a substance has the property of being decomposed by the action of microorganisms and the like. The biodegradable environment may be water, soil, or compost. Although it is preferable that the present invention be manufactured only from materials that are ultimately completely decomposed into water and carbon dioxide, it also includes materials that are mainly made of biodegradable materials.

Both the cylinder 20 and the core 30 of the present invention are preferably selected from a paper tube having multiple layers, a cellulose molded product, and a biodegradable plastic molded product. In particular, by selecting unbleached materials from these materials, energy consumption and carbon dioxide emissions can be reduced compared to products manufactured by a method that includes a bleaching process, which is preferable from the perspective of reducing environmental impact.

It is preferable that the paper tube, cellulose molded product, biodegradable plastic molded product, and other biodegradable materials used in the cylinder 20 of the present invention have enough rigidity to allow slight deformation. The cylindrical body 20 and the core body 30 may be made of the same or different materials. For example, when a paper tube is selected for the cylinder 20, the core body 30 may be a paper tube, a cellulose molded product, or a biodegradable plastic molded product. When the cylinder body 20 and the core body 30 are made of a combination of different materials, the bag body can be attached by inserting the core body 30 with the bag attached into the hollow 21 through the notches 23 and 24 of the cylinder body 20. The core body 30 is preferably selected to have a rigidity equal to or higher than that of the cylinder body 20 so that the gap 22 of the cylinder body 20 can be widened as much as necessary for insertion of the core body 30. . The rigidity of the cylinder and the core in this specification is evaluated based on the amount of deflection that occurs in a test piece of the material used for the cylinder or the core in a known bending strength test.

The paper tube is preferably a paper tube in which a plurality of base papers are wound and laminated, and from the viewpoint of ensuring strength while being lightweight, a so-called spiral paper tube in which base paper is spirally wound is more preferable. From the viewpoint of effective resource utilization, it is more preferable that the amount of waste paper pulp used in the base paper is 90% or more.

Examples of cellulose molded products include those molded from a composite material in which cellulose nanofibers are dispersed in a resin. Biodegradable plastics may be derived from biomass or fossils, such as polylactic acid (PLA), polyhydroxybutyrate (PHBH), polyhydroxyalkanoic acid (PHA), biopolybutylene succinate (bioPBS), etc. ), bio polybutylene adipate terephthalate (bio PBAT), PBS, PBAT, etc.

As described above, according to the present invention, the user can easily close the bag while intuitively feeling that the bag has been closed securely. Furthermore, the cylinder and core of the present invention are durable, but even if one of them deteriorates, since the cylinder and core are separated, only the deteriorated one can be replaced and the other can continue to be used. Therefore, those who dispose of it are less likely to turn it into so-called plastic waste. That is, the present invention is an environmentally friendly closure.

10 Obturator
20 cylinder
21 Hollow
22 Slit
23 Notch
24 Notch
25 First region of cylinder
26 Second area of cylinder
30 Core body
31 First area of core
32 Second area of core
H1 Surface height of the first area of the core
H2 Surface height of the second area of the core
H3 Surface height of the first area of the cylinder
H4 Surface height of second area of cylinder
P1 Bag opening
P2 bag opening area
P3 Bag storage area
S1 Selection point in the first region of the core
S2 Selected point in second area of core
S3 Selection point of first region of cylinder
S4 Selected point in second region of cylinder
X1 Core axis
X2 Axis of cylinder

Claims (3)

Equipped with a cylindrical body and a core body that can be inserted into the hollow of the cylindrical body,
The cylindrical body has a slit provided along the longitudinal direction, and a notch provided continuously with the slit at at least one of one end and the other end in the longitudinal direction of the cylindrical body,
On the outer surface of the core, first regions and second regions are formed alternately from one end to the other end in the longitudinal direction of the core, and the surface height of the second region is is higher than the surface height of the first area ,
A closure device for a bag body, wherein a second region is spirally formed on the outer surface of the core body from one end to the other end in the longitudinal direction of the core body. The bag closure according to claim 1, wherein the barrel and/or core are biodegradable. The bag closure device according to claim 1, wherein the cylinder and/or core are selected from one or more of a paper tube having multiple layers, a cellulose molded product, and a biodegradable plastic molded product.

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