Bag with fitting

Abstract

To provide an engagement tool that can be repeatedly opened while preventing indeliberate opening by an infant, a child, etc., and to provide a bag body with the engagement tool.SOLUTION: An engagement tool 10 includes: a first engagement member 12 which has a first engagement part 18 provided along a longitudinal direction in a belt-like first base material 16; and a second engagement member 14 which has a second engagement part 22 provided along a longitudinal direction in a belt-like second base material 20 and which detachably engages with the first engagement part. The first base material and the second base material are provided with extension parts 13, 17 extending oppositely to external surface sides 16d, 20d on an opposite side from opposing surfaces 16a, 20a on which the first engagement part or the second engagement part is installed from first end parts 16c, 20c in the width direction. Second end parts 16b, 20b on the opposite side from the first end parts are arranged away from the extension parts.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention , fit This relates to a bag body with a joint. [Background technology]

[0002] Bags with fittings, in which a fitting that seals the opening of the bag in an openable and closable manner is attached to the inner surface of the bag near the opening, are widely used in various fields such as food, medicine, and miscellaneous goods. Examples of fittings include a pair of strip-shaped base materials, each of which has a first fitting portion and a second fitting portion that detachably fit with each other, and which are provided along the longitudinal direction of the pair of base materials, and the pair of base materials are positioned opposite each other and fitted together. For example, a detachable fitting is known in which the first fitting portion and the second fitting portion both have a plurality of parallel male claws, and the heads of the male claws are inserted between the two opposing male claws to hook them together.

[0003] In such a bag with a fitting, the opening formed in the bag can be closed by fitting the first fitting portion and the second fitting portion of the fitting. The bag can also be reopened by grasping each open end of the bag body to which the fitting is attached and pulling them apart to release the engagement between the first fitting portion and the second fitting portion. In this way, the bag with a fitting can be repeatedly opened and closed.

[0004] For example, when packaging items such as cigarettes, alcohol-containing foods, and medicines in a bag with a fastening device, it is desirable to store them out of the reach of infants, children, and other persons lacking the ability to make judgments. However, there are cases where persons lacking the ability to make judgments accidentally touch a bag with a fastening device containing such packaged items. Conventional bags with fastening devices are designed to be easily opened and closed, so anyone can easily open them. As a result, bags with fastening devices containing packaged items that should not be touched by infants, children, and the like can also be easily opened. Therefore, there has been a demand for a bag with a fastening device that can be repeatedly opened but is difficult for infants and children to open. For example, Patent Document 1 discloses a packaging bag equipped with a child-resistant zipper to prevent children, etc. from easily opening the bag. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-88531 Summary of the Invention [Problem to be solved by the invention]

[0006] The packaging bag described in Patent Document 1 has a locking area with a child-resistant function at a portion of the opening of the bag, and easy-to-release release areas at the left and right ends of the locking area. The release areas are configured to be easily opened by inserting a finger above the fitting portion. Therefore, even children could open the packaging bag by inserting their fingers into the release areas. Furthermore, the release areas of the packaging bag described in Patent Document 1 are specifically tongue-shaped members integrated with the adhesive strip and extending toward the opening at one or both of the left and right ends of the bottom adhesive fitting body. It has been proposed to provide these release areas, for example, by cutting the center of the adhesive strip along the fitting portion or by adhering separate release pieces to the left and right ends of the adhesive strip. In either case, these methods require additional processes after attaching the zipper to the bag body when manufacturing the packaging bag, which can lead to reduced production efficiency and yield.

[0007] The present invention has been made in view of the above circumstances, and is directed to a container that can be repeatedly opened while preventing accidental opening by infants, children, etc. Na-ken The object is to provide a bag body with a joining part. [Means for solving the problem]

[0008] The present invention has the following configuration. [1] A bag body having a storage section for storing contents; and a fitting attached to the bag body in the vicinity of an opening on the inner surface thereof so as to be able to seal the bag body, wherein the fitting comprises: a first fitting member provided on the inner surface near the opening of the bag body, the first fitting member having a first fitting portion provided along the longitudinal direction of a strip-shaped first base material; and a second fitting member provided on the inner surface opposite the first fitting member near the opening of the bag body, the second fitting portion being provided along the longitudinal direction of a strip-shaped second base material and detachably fitting with the first fitting portion, wherein the A part of the outer surface of each first end portion of the first base material and the second base material, which is located on the side of the containing portion in the width direction, is fixed to the inner surface of the bag body, and a second end portion, which is located on the opening side opposite to the first end portion, is disposed spaced apart from the inner surface of the bag body, and the first base material and the second base material are spaced apart from the inner surface of the bag body from below the first fitting portion and the second fitting portion to the second end portion, and the first fitting portion and the second fitting portion are in a fitted state in which the first fitting portion and the second fitting portion are fitted together, and when a user removes the second end portion, by hand The mated state can be released by gripping the first base material and the second base material and applying a force in a direction separating the first base material and the second base material from each other, and the force required to release the mated state is greater than the force required to separate the second ends and release the mated state. Ku It is configured hand, The second end portion of the first base material and the second end portion of the second base material extend in the width direction from the first fitting portion and the second fitting portion toward the opening portion so as to be grippable by the user. A bag body with a fitting. [2 ]before The bag body with fitting described in [1] is configured such that when the user grasps the edge of the bag body to widen the opening from the fitted state in which the first fitting portion and the second fitting portion are fitted together, the inner surface of the bag body moves away from the outer surfaces of the first base material and the second base material, and the positions of the first base material and the second base material are maintained, thereby maintaining the fitted state. [Effects of the Invention]

[0009] Can be opened repeatedly while preventing accidental opening by infants and children Na-kenA bag body with a joint can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a fitting according to a first embodiment of the present invention. [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 3] 1 is a cross-sectional view of a fitting according to a first embodiment of the present invention in a fitted state. [Figure 4] 1 is a front view of a bag body with a fitting according to a first embodiment of the present invention. FIG. [Figure 5] 1 is a perspective view of an opening of a bag body with a fitting according to a first embodiment of the present invention. FIG. [Figure 6] 5 is a cross-sectional view of FIG. 4 taken along line B-B. [Figure 7] 1 is a partial cross-sectional view showing a usage mode of a bag body with a fitting according to a first embodiment of the present invention. [Figure 8] FIG. 10 is a cross-sectional view showing the opening of a bag with a fitting according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] [Fittings] A fitting according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 3, the fitting 10 according to this embodiment comprises a strip-shaped first fitting member 12 and a second fitting member 14. The fitting 10 is configured so that a first fitting portion 18 of the first fitting member 12 and a second fitting portion 22 of the second fitting member 14 are arranged opposite each other and are detachably fitted together. The fitting 10 is used by being attached near the opening of a bag with a fitting, which will be described later, so as to be able to seal the opening.

[0012] (First fitting member) The first fitting member 12 has a strip-shaped first base material 16, a first fitting portion 18, and a first extension portion 13. The first fitting portion 18 and the first extension portion 13 extend along the longitudinal direction of the first base material 16.

[0013] The first substrate 16 is not particularly limited, and any substrate used for known fittings can be used. Examples include polyolefin resins such as ethylene polymers and propylene polymers. The first substrate 16 is preferably a substrate made of a laminated film. Examples of laminated films include a film in which a heat-resistant layer and a heat-sealing layer are laminated on the opposing surface 16a facing the second substrate 20. The first substrate 16 may also have a barrier layer between the heat-resistant layer and the heat-sealing layer.

[0014] Examples of materials for the heat-resistant layer include biaxially oriented nylon, biaxially oriented polypropylene, etc. Examples of materials for the heat-sealable layer include linear low-density polyethylene, unoriented polypropylene, ethylene-vinyl acetate copolymer, ionomer, etc. The barrier layer may be made of polyvinyl alcohol or the like.

[0015] The first substrate 16 may be made of one type of resin or a resin composition containing two or more types of resins. If necessary, known additives such as stabilizers, antioxidants, lubricants, antistatic agents, and colorants may be added. The first substrate 16 is not limited to a substrate made of a laminated film, but may be a substrate made of a single layer film.

[0016] In addition, the first substrate 16 and the second substrate 20 may each have a resin layer with easy-to-cut properties at least in part. A polyolefin resin composition is used for the resin layer with easy-to-cut properties. Examples of crystalline polyolefin resins that make up the polyolefin resin composition include ethylene polymers and propylene polymers. Ethylene polymers are not particularly limited, and examples include ethylene homopolymers, ethylene-α-olefin copolymers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, and copolymers with metal salts thereof. Examples of propylene polymers include propylene homopolymers, random copolymers or block copolymers of propylene with ethylene or other olefins having 4 or more carbon atoms, and the like. The first substrate 16 and the second substrate 20 may each have a resin layer with easy-to-cut properties over their entire area.

[0017] As shown in FIGS. 1 to 3, the first fitting portion 18 is provided along the longitudinal direction of the first base material 16 on an opposing surface 16a of the first base material 16 that faces the second base material 20 of the second fitting member 14.

[0018] The first fitting portion 18 includes a stem 18a that rises from the opposing surface 16a of the first base material 16, and a head 18b that is provided at the tip end of the stem 18a and is larger than the stem 18a. The first fitting portion 18 is a male fitting portion, and is configured so that the head 18b fits into a recess 22c of the second fitting portion 22, which will be described later.

[0019] In this example, head 18b of first fitting portion 18 has a shape in which portion 18c on the second side end 16b (second end) side protrudes more than portion 18d on the first side end 16c side. With this configuration, when first fitting portion 18 and second fitting portion 22 are fitted together in the bag as described below, the fitting strength is higher on the storage portion side where the contents are stored than on the opening side, making it difficult for the first fitting portion 18 and second fitting portion 22 to be disengaged even if the internal pressure of the bag increases. Furthermore, the fitting strength is relatively low on the opening side, making it easy to disengage first fitting portion 18 and second fitting portion 22 by applying force by hand.

[0020] The shape of the first fitting portion 18 may be any known shape as long as it can fit into the second fitting portion 22. The material of the first fitting portion 18 is not particularly limited, and for example, the same material as the first base material 16 can be used.

[0021] As shown in FIGS. 1 to 3 , the first fitting member 12 has a first extension portion 13. The first extension portion 13 is a flat, band-like member extending in the longitudinal direction so as to face the outer surface 16d of the first base material 16, which is opposite the opposing surface 16a. The first extension portion 13 extends continuously from a first side end 16c, which is one end of the first base material 16 in the width direction, toward the outer surface 16d. A first folded portion 11 is formed at the boundary between the first extension portion 13 and the first base material 16. In this embodiment, the first folded portion 11 is bent so that the angle θ between the outer surface 16d of the first base material 16 and the inner surface 13a of the first extension portion 13 facing the outer surface 16d is an acute angle. However, the first end 16c of the first base material 16 and the first extension portion 13 may be curved.

[0022] 2, the width W13 of the first extension portion 13 is longer than the width W16 of the first base material 16. In the width direction W10 of the fitting 10, the first extension end 13b of the first extension portion 13, which is opposite the first side end 16c, is located closer to the second side end 16b than the first fitting portion 18 of the first base material 16. In this embodiment, the first extension end 13b extends further than the second side end 16b of the first base material 16 in the width direction W10 of the fitting 10.

[0023] 2, the first extending end 13b of the first extending portion 13 is located closer to the second side end 16b than the first fitting portion 18. That is, in the width direction W10 of the fitting device 10, the length of the first fitting member 12 from the first side end 16c to the first extending end 13b of the first extending portion 13 is longer than the length from the first side end 16c to the trunk portion 18a of the first fitting portion 18.

[0024] The first extension 13 is preferably a laminated film having at least a base layer and a sealant layer. Examples of the base layer include biaxially oriented nylon and biaxially oriented polypropylene. Examples of the sealant layer include linear low-density polyethylene, unoriented polypropylene, ethylene-vinyl acetate copolymer, and ionomer. The first extension 13 may further include a functional layer such as a barrier layer. Alternatively, the first extension 13 may be a single-layer film consisting only of the sealant layer.

[0025] (Second fitting member) The second fitting member 14 has a strip-shaped second base material 20, a second fitting portion 22, and a second extension portion 17. The second fitting portion 22 and the second extension portion 17 extend along the longitudinal direction of the second base material 20. The second fitting member 14 has the same configuration as the first base material 16, the first folded portion 11, and the first extension portion 13 of the first fitting member 12. That is, the second fitting member 14 differs from the first fitting portion 18 in the configuration of the second fitting portion 22, but the shapes of the other portions are similar to those of the first fitting member 12. The material constituting the second substrate 20 is not particularly limited, and may be, for example, a substrate having the same configuration as the first substrate 16, and the preferred embodiments are also the same.

[0026] 1 to 3, the second fitting portion 22 is provided on an opposing surface 20a of the first fitting member 12 that faces the first base material 16. The second fitting portion 22 has a pair of first and second arm portions 22a and 22b that rise up from the opposing surface 20a of the second base material 20 and have an arc-shaped cross section. The second fitting portion 22 has a recess 22c that extends in the longitudinal direction of the second base material 20 between the first arm portion 22a and the second arm portion 22b.

[0027] 3, the head 18b of the first fitting portion 18 fits into the recess 22c of the second fitting portion 22, and the head 18b of the first fitting portion 18 is locked by the respective tip portions of the first arm portion 22a and the second arm portion 22b of the second fitting portion 22, thereby fitting the first fitting portion 18 and the second fitting portion 22 together. Furthermore, by moving the first fitting portion 18 in a mated state in a direction away from the second fitting portion 22, the head 18b of the first fitting portion 18 pushes the first arm portion 22a and the second arm portion 22b of the second fitting portion 22 apart from each other from the inside, thereby separating them. In this way, the first fitting portion 18 and the second fitting portion 22 are configured to be detachably fitted together.

[0028] The shape of the second fitting portion 22 may be any shape as long as the opening of the bag body can be repeatedly opened and closed by attaching and detaching the first fitting portion 18 and the second fitting portion 22 to and from each other. The material of the second fitting portion 22 is not particularly limited, and for example, the same material as the first base material 16 can be used.

[0029] As shown in FIGS. 1 to 3 , the second fitting member 14 has a second extension portion 17. The second extension portion 17 is a flat, band-like portion extending in the longitudinal direction so as to face the outer surface 20d of the second base material 20, which is opposite the opposing surface 20a. The second extension portion 17 extends continuously from a first side end 20c, which is one end of the second base material 20 in the width direction, toward the outer surface 20d of the second base material 20. A second folded portion 15 is formed at the boundary between the second extension portion 17 and the second base material 20. In this embodiment, the second folded portion 15 is bent so that the angle θ between the outer surface 20d of the second base material 20 and the inner surface 17a of the second extension portion 17 facing the outer surface 20d of the second base material 20 is an acute angle. However, the first end 20c of the second base material 20 and the second extension portion 17 may be connected in a curved manner.

[0030] 2, the width W17 of the second extension portion 17 is longer than the width W20 of the second base material 20. In the width direction W10 of the fitting 10, the second extension end 17b of the second extension portion 17, which is opposite the second folded portion 15, is located closer to the second side end 20b (second end) than the second fitting portion 22 of the second base material 20. In this embodiment, in the width direction W10 of the fitting 10, the second extension end 17b extends further than the second side end 20b of the second base material 20.

[0031] 2, the first extending end 17b of the second extending portion 17 is located closer to the second side end 20b than the second fitting portion 22. That is, in the width direction W10 of the fitting device 10, the length of the second fitting member 14 from the first side end 20c to the second extending end 17b of the second extending portion 17 is longer than the length from the first side end 20c to the second arm portion 22b of the second fitting portion 22.

[0032] As shown in Figure 3, when the first fitting portion 18 and the second fitting portion 22 are fitted together, the first side end 16c of the first substrate 16 and the first side end 20c of the second substrate 20 are aligned in the width direction W10 of the fitting device 10.

[0033] The first extension 13 and the second extension 17 are connected to the first substrate 16 or the second substrate 20, respectively, with the folded portions 11, 15 as the boundaries. Meanwhile, the first extension 13 and the second side end 16b of the first substrate 16 are spaced apart, and the second extension 17 and the second side end 20b of the second substrate 20 are spaced apart. The first extension 13 and the second extension 17 are configured to elastically deform from the folded portions 11, 15 as starting points and move toward or away from the first substrate 16 or the second substrate 20. In other words, the second side ends 16b, 20b and the extensions 13, 17 are spaced apart. Note that the spaced apart arrangement here refers to a state in which the second side ends 16b, 20b and the extensions 13, 17 are not adhesively fixed and are arranged so as to be able to abut or separate from each other, and includes a state in which they are pushed into contact with each other by an external force, as well as a state in which they are spaced apart from each other.

[0034] When the first fitting portion 18 and the second fitting portion 22 are fitted together, the first extension portion 13 is movable between a state in which it is close to and faces the outer surface 16d of the first base material 16 of the first fitting member 12, and a state in which it is spaced apart from the outer surface 16d. Similarly, when the first fitting portion 18 and the second fitting portion 22 are fitted together, the second extension portion 17 is movable between a state in which it is close to and faces the outer surface 20d of the second base material 20 of the second fitting member 14, and a state in which it is spaced apart from the outer surface 20d.

[0035] The first fitting portion 18 and the second fitting portion 22 are configured to be able to release their fitted state when a force is applied in a direction that separates the first substrate 16 and the second substrate 20. Specifically, when a user pinches the second side ends 16b, 20b of the first substrate 16 and the second substrate 20 with their fingers and spreads the opposing surfaces 16a, 20a apart, the first fitting portion 18 falls off the second fitting portion 22 and the fitted state is released. Furthermore, the first fitting portion 18 can also fall off the second fitting portion 22 when an external force is applied to the first side ends 16c, 20c, causing the opposing surfaces 16a, 20a of the first substrate 16 and the second substrate 20 to move in a direction that separates them. However, the force required to release the fitted state between the first fitted portion 18 and the second fitted portion 22 is greater than the force required to separate the second side ends 16b, 20b and release the fitted state of the fitted portions 18, 22. Therefore, even if an external force is applied to each of the first side ends 16c, 20c, the fitted state of the fitted portions 18, 22 is unlikely to be released.

[0036] The method for manufacturing the fitting of the present invention is not particularly limited, and any known method can be used. Examples of methods for manufacturing the first fitting member 12 and the second fitting member 14 include extrusion molding.

[0037] According to the fitting device 10 of this embodiment, the first fitting member 12 and the second fitting member 14 are provided with extensions 13, 17, respectively, and the second side ends 16b, 20b are spaced apart from the extensions 13, 17. Therefore, the user can easily release the fitted state by grasping and separating the second side ends 16b, 20b. Meanwhile, in order for the user to grasp and separate the extended ends 13b, 17b to release the fitted state, the distance between the extended ends 13b, 17b must be at least a predetermined distance. Therefore, by providing such fitting device 10 at the opening of a bag, a fitting device that can be repeatedly opened can be provided while preventing accidental opening by infants and children.

[0038] According to fitting device 10 of this embodiment, even if extending ends 13b, 17b are grasped and moved apart, it is difficult for infants, children, etc. to disengage fitting portions 18, 22, and it is therefore difficult for infants, children, etc. to open the device, but the second side ends 16b, 20b, which are difficult for infants, children, etc. to operate, can be grasped and moved apart to disengage fitting portions 18, 22. In other words, fitting device 10 has the function of preventing opening by infants, children, etc. in the same longitudinal region, and the function of disengaging fitting portions 18, 22 by grasping and moving second side ends 16b, 20b apart.

[0039] By attaching the fitting 10 according to this embodiment to the opening of a bag, it is possible to easily manufacture a bag with a fitting that can be repeatedly opened while preventing accidental opening by infants and children. The fitting 10 according to this embodiment has a child-resistant function in the same longitudinal region and a function that allows it to be opened by grasping the second side edges 16b, 20b, so there is no need to perform a process of setting the child-resistant function after attaching it to the opening of the bag. As a result, a bag with a fitting that has a child-resistant function can be easily manufactured.

[0040] [Bag with fitting] Hereinafter, a bag with a fitting 1 (hereinafter sometimes referred to as "bag 1") equipped with the above-described fitting 10 will be described as a bag with a fitting according to this embodiment.

[0041] In this embodiment, the shape of the bag body 40 is rectangular. However, the shape of the bag body 40 is not limited to a rectangle. Furthermore, the size of the bag body 40 is not particularly limited, and the shape and size may be appropriately selected depending on the contents to be accommodated in the bag body 40. As shown in FIG. 4, the bag body 1 comprises a sealed bag body 40 for accommodating contents, and a fitting 10 attached laterally to the inner surface of the upper part of the bag body 40.

[0042] The bag body 40 is formed by overlapping a first film material 42 and a second film material 44 and heat-sealing their entire peripheral edge 46 to form a sealed bag. Below the fitting 10 of the bag body 40 is a storage section 47 in which the contents are stored. The upper part of the bag body 40 above the fitting 10 becomes the opening 52 after the bag body 1 is opened. In other words, the fitting 10 is attached near the opening 52 of the bag body.

[0043] The first film material 42 and second film material 44 forming the bag body 40 may be any material that can weld the fitting 10 by heat sealing, and a laminated film having at least a sealant layer and a base material layer from the inner side is preferred. Examples of the substrate layer include biaxially oriented nylon and biaxially oriented polypropylene. Examples of the sealant layer include linear low-density polyethylene, unstretched polypropylene, ethylene-vinyl acetate copolymer, and ionomer. The laminated film may be provided with a functional layer such as a barrier layer, etc. The first film material 42 and the second film material 44 may be single-layer films consisting of only a sealant layer.

[0044] In the bag body 1, as shown in Figure 6, the outer surface 13d of the first extending end 13b of the first extension portion 13 is welded to the first film material 42 of the bag body 40, and the outer surface 17d of the second extending end 17b of the second extension portion 17 is welded to the second film material 44 of the bag body 40, thereby fixing the fitting 10 to the inner surface of the bag body 40.

[0045] The fitting 10 has the second side end 16b of the first base material 16, the first extension end 13b of the first extension portion 13, the second side end 20b of the second base material 2012, and the second extension end 17b of the second extension portion 17 arranged on the opening 52 side of the bag body 1, and each first end 16c, 20c arranged on the storage section 47 side of the bag body 1.

[0046] 6, the first fitting member 12 and the second fitting member 14 are arranged such that the first fitting portion 18 and the second fitting portion 22 face each other. When the first fitting member 12 and the second fitting member 14 are fitted together, the pair of base materials 16, 20 and the pair of extension portions 13, 17 are arranged symmetrically with the first fitting member 12 and the second fitting member 14 in between.

[0047] As shown in Fig. 5, the fitting 10 is arranged in a W-shape in the vertical cross section of the bag body 1. The outer surface 13d of the first extending end 13b and the outer surface 17d of the second extending end 17b are welded to the film materials 42, 44 of the bag body 40, respectively. Below the welded portion between the fitting 10 and the bag body 40, the lower part of the first extending portion 13, the first folded portion 11, the first base material 16, the second base material 20, the second folded portion 15, and the lower part of the second extending portion 17 are sandwiched between the film materials 42, 44 of the bag body 40 and arranged in a spaced-apart state. Note that when the film materials 42, 44 of the bag body 40 are brought close to each other, the extending portions 13, 17 and the film materials 42, 44 can face each other and come into contact with each other. Furthermore, the outer surfaces 16d, 20d of the base materials 16, 20 and the inner surfaces 13a, 17a of the extension portions 13, 17 face each other and can come into contact with each other.

[0048] When the opening 52 of the bag body 40 is widened, a gap is formed between the second side end 16b of the first base material 16 and the second side end 20b of the second base material 20 and the first extension portion 13 and the second extension portion 17, and when the user picks up each second side end 16b and second side end 20b with their hands and moves them in a direction separating them, the engagement between the first fitting portion 18 and the second fitting portion 22 is released, and the bag body 1 can be opened.

[0049] On the other hand, as shown in Figure 7, when edge portions 42b, 44b of film materials 42, 44 near opening 52 of bag body 40 are grasped and film materials 42, 44 are moved in the direction shown by the arrow in Figure 7, extensions 13, 17 move away from base materials 16, 20, but base materials 16, 20 do not move away from each other, and the fitted state between first fitting portion 18 and second fitting portion 22 is maintained. With fitting device 10, when folded-back portions 11, 15 move away from each other by a predetermined distance or more, the fitted state between first fitting portion 18 and second fitting portion 22 can be released. 5 and 6, both widthwise ends of the bag body 40 are welded, and the fitting 10 is provided on the inner surface of the film materials 42, 44 near the opening 52. Therefore, when the opening 52 is fully opened, the first substrate 16 and the second substrate 20 remain facing each other, and the first fitting portion 18 and the second fitting portion 22 are not disengaged. Therefore, even if the user grasps the edge portions 42b, 44b of the film materials 42, 44 near the opening 52 to widen the opening 52, the first fitting portion 18 and the second fitting portion 22 are not disengaged, and the bag 1 cannot be opened. On the other hand, when the user grasps the second side ends 16b, 20b of the substrates 16, 20 and widens them in directions away from each other, the first fitting portion 18 and the second fitting portion 22 are disengaged.

[0050] [Method of manufacturing a bag with a fitting] The manufacturing method of the bag with fitting 1 includes the following steps. Fitting member molding process: The resin material forming the fitting is fed into an extruder, extruded through a circular die, cooled by air or water, and then expanded into a film by inflation. This forms the first fitting member 12, which has a first fitting portion 18, a first substrate 16, and a first extension portion 13 on its inner surface. The second fitting member 14 is formed in the same manner. Fitting device welding process: The fitting device 10 is welded to the inner surfaces of the first film material 42 and the second film material 44. In this process, a heating tool such as a heat bar is used to weld the outer surface 13d of the first extending end 13b of the first extending portion 13 to the inner surface of the first film material 42, and the outer surface 17d of the second extending end 17b of the second extending portion 17 to the inner surface of the second film material 44, at a position that avoids the first fitting portion 18, the second fitting portion 22, the first base material 16, and the second base material 20. Cutting process: After the fitting welding process, the film materials 42, 44 are folded so that the first fitting portion 18 and the second fitting portion 22 face each other, and are cut in the width direction at multiple positions spaced apart in the length direction to continuously form the base of the bag body 1 with fitting. Packaging process: The cut first film material 42 and second film material 44 are fed into a packaging device with their inner surfaces facing each other, and the contents are sandwiched between the first film material 42 and the second film material 44, while the peripheral edges of the first film material 42 and the second film material 44 are heat-sealed. Through this process, the bag body 40 is sealed with the contents contained in the containing section 47.

[0051] The manufacturing method of the bag with a fitting is not limited to the manufacturing method of the bag with a fitting described above. For example, the manufacturing method of the bag with a fitting may involve temporarily winding up the tubular body obtained in the molding process. Furthermore, a stretching process, a printing process, etc. may be performed as necessary.

[0052] The above-described bag body with fitting 1 has the above-described configuration, and can be repeatedly opened while preventing accidental opening by infants, children, and the like.

[0053] The bag with fitting 1 according to this embodiment can be manufactured to have a child-resistant function in the entire area of ​​the opening where fitting 10 is provided.

[0054] The bag body with fittings in this embodiment is an example in which the fittings 10 are welded to the first film material 42 and the second film material 44, but the configuration of the bag body with fittings is not limited to this, and the first fitting portion and the second fitting portion may be formed directly on the inner surface of the film material that makes up the bag body.

[0055] (Second embodiment) 8 shows a vertical cross-sectional view of the opening 52 of the bag with fitting 1A according to the second embodiment. In the following description, the same components as those already described in the first embodiment are given the same reference numerals, and redundant description will be omitted. The bag with fitting 1A according to this embodiment is an example that does not have the folded-back portion shown in the first embodiment.

[0056] The configurations of the first substrate 16, the second substrate 20, the first fitting portion 18, and the second fitting portion 22 are the same as those in the first embodiment. In the bag body 1A shown in Fig. 8, an outer surface 16d of a first side end 16c of the first substrate 16 is fixed to the inner surface of the first film material 42, and an outer surface 20d of a first side end 20c of the second substrate 20 is fixed to the inner surface of the second film material 44. The first substrate 16 and the second substrate 20 are not fixed to the film materials 42, 44 from below the first fitting portion 18 and the second fitting portion 22 (on the storage portion 47 side) to the second side ends 16b, 20b, and the second side ends 16b, 20b (the opening side ends) are free ends.

[0057] In the bag with fitting 1A according to this embodiment, similar to the bag with fitting 1 according to the first embodiment, even if the edge ends 42b, 44b of the film materials 42, 44 are grasped and the opening 52 is opened, the engagement between the first fitting portion 18 and the second fitting portion 22 is not released. On the other hand, if the second side ends 16b, 20b of the base materials 16, 20 are grasped and opened in directions away from each other, the engagement between the first fitting portion 18 and the second fitting portion 22 can be easily released.

[0058] As with the first embodiment, the bag with fitting 1A according to this embodiment can be repeatedly opened while preventing accidental opening by infants, children, etc. Furthermore, with bag with fitting 1A, it is possible to manufacture a bag that has a child-resistant function in the entire area of ​​the opening where fitting 10 is provided.

[0059] The above-mentioned bags 1, 1A with fittings can be suitably used for storing packaged items that should not be opened by infants, children, or elderly people.

[0060] In the above embodiment, an example was shown in which the width of the extensions 13, 17 was longer than the width of the base materials 16, 20, but the dimensions of the extensions 13, 17 are not limited to this. For example, if the extension ends are fixed to the inner surface of the bag body by a method other than heat welding, or if the width of the base material is sufficiently long, the width of the extensions and the width of the base material may be approximately equal, and the extension ends may be provided at a position approximately equal to the second end of the base material.

[0061] In the above embodiments and comparative examples, the first fitting member 12 and the second fitting member 14 have the same shape and are arranged symmetrically, except for the configuration of the fitting portions 18 and 22. However, it is not essential that the shapes of the base material and the extension portion of the first fitting member and the second fitting member are the same. For example, the widths of the first extension portion and the second extension portion may be different.

[0062] Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like are also included within the scope of the present invention. Furthermore, the components shown in the above-described embodiments and each modification can be appropriately combined to form a configuration. [Explanation of symbols]

[0063] 1,1A Bag with fitting 10 Fitting 12 First fitting member (fitting member) 13 1st extension part (extension part) 13b 1st extension end (extension end) 14 Second fitting member (fitting member) 16 First base material (base material) 17 Second extension (extension) 17b 2nd extension end (extension end) 18 First fitting part (fitting part) 20 Second base material (base material) 22 Second fitting portion (fitting portion) 40 bags 47 Storage section 52 Opening

Claims

1. A bag body having a storage section for storing contents; a fitting attached to the inner surface of the bag body near the opening so as to be able to seal the bag body, The fitting tool is a first fitting member provided on an inner surface of the bag body near the opening, the first fitting member having a first fitting portion provided along the longitudinal direction of a band-shaped first base material; a second fitting member provided on the inner surface of the bag body in the vicinity of the opening thereof and facing the first fitting member, the second fitting member having a second fitting portion provided on a belt-shaped second base material along the longitudinal direction thereof and detachably fitting with the first fitting portion; Equipped with a part of an outer surface of each first end portion of the first base material and the second base material that is located on the storage portion side in the width direction is fixed to the inner surface of the bag body, a second end portion located on the opening side opposite to the first end portion and spaced apart from the inner surface of the bag body; the first base material and the second base material are spaced apart from the inner surface of the bag body from below the first fitting portion and the second fitting portion to the second end portion, the first fitting portion and the second fitting portion are configured so that the fitted state in which the first fitting portion and the second fitting portion are fitted together can be released by a user gripping the second end portion with his or her hand and applying force in a direction separating the first base material and the second base material from each other, a force required to separate the first ends and release the fitted state is greater than a force required to separate the second ends and release the fitted state, A bag body with a fitting, characterized in that the second end portion of the first base material and the second end portion of the second base material extend in the width direction from the first fitting portion and the second fitting portion toward the opening side so that they can be grasped by the user.

2. 2. The bag body with fitting according to claim 1, wherein when the user grasps the edge of the bag body to widen the opening from the fitted state in which the first fitting portion and the second fitting portion are fitted together, the inner surface of the bag body moves away from the outer surfaces of the first base material and the second base material, and the positions of the first base material and the second base material are maintained, thereby maintaining the fitted state.

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