JP2012115511A - Zipper and packaging bag with the zipper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a zipper that prevents deformation of a male and female members including the zipper, and that facilitates and ensures fitting of the male and female members, and also to provide a packaging bag with the zipper.SOLUTION: In the zipper 100, a pair of the male and female members 20, 30 are provided oppositely to films 2 (2a, 2b) constituting the opening 5 of a bag body 1, and an engagement part 50 is formed by fitting of the male and female members, and the opening 5 is made resealable. In the film, a guide 40 is provided in parallel with the engagement part, a space S1 between the guide and the center 50a of the engagement part is set to be 5 mm or less, and the guide is formed to be higher than the engagement part.

Description

  The present invention relates to a zipper that is provided at an opening of a bag body so that the opening can be closed again, and a packaging bag with a zipper including the zipper.

  2. Description of the Related Art Conventionally, as a packaging bag for enclosing various articles such as foods, pharmaceuticals, and parts, a packaging bag in which a band-like structure called a zipper is provided on the inner surface of an opening is used (see, for example, Patent Document 1). The zipper generally has a pair of male members and female members, and the male members and the female members are attached to face each other to form the opening of the packaging bag. Such a zipper closes the opening of the packaging bag by setting the male member and the female member in a fitted state, and opens the packaging bag by closing the male member and the female member in a non-fitted state. Open the part.

  When the user closes the opening of the packaging bag, the fingertip (generally, the thumb of the thumb and forefinger) is pressed against the back of the male member and the female member, and the fingertip is zipped while holding it. The male member and the female member are fitted to each other to form an occlusal portion. A technique for allowing a user to easily and reliably perform such an operation of closing the opening is disclosed (see, for example, Patent Document 2). The packaging bag described in Patent Document 2 is provided with a dam-like band in the vicinity of the zipper in parallel with the zipper. When the back of the zipper is pinched with the finger pad, the finger pad enters the recess between the zipper and the weir band, and the finger pad that enters the recess is guided and regulated with the zipper sandwiched between the zipper and the weir band. And prevent the finger pad from deviating from the back line of the zipper.

  Further, in the operation of closing the opening, the occlusal part is covered with the fingertip, so that it becomes difficult for the user to detect whether or not the zipper is properly closed. Therefore, a technique for easily detecting the fitting state is disclosed (for example, see Patent Document 3 or Patent Document 4). In the zippers including Patent Document 3 and Patent Document 4, at least one of the male member and the female member is discontinuous along the longitudinal direction. Since the male member and the female member are discontinuously fitted, the user senses the vibration or swaying feeling that occurs each time they are fitted with each other, and also listens to a clicking sound that is generated when fitting. It can be determined whether the zipper has been properly closed.

JP-T-2004-511401 JP 2009-196658 A JP-A-8-58811 Japanese National Patent Publication No. 11-501890

  By the way, as for the packaging bag with a zipper, from the viewpoint of facilitating the taking in and out of articles, a long length of the opening in the longitudinal direction is often seen, and the length of the zipper in the longitudinal direction is also increased accordingly. Yes. Furthermore, the film constituting the packaging bag tends to be thin. However, in a packaging bag using a thin film with weak waist, the longer the zipper is in the longitudinal direction, the more properly the male member and female member are fitted together when the male member and female member are sandwiched. It becomes difficult. If the male member and the female member are clamped with force in a state of being shifted from an appropriate fitting position between the male member and the female member, the male member and the female member are easily deformed. Once deformed, it may be difficult to fit the male member and the female member in the reclosing operation, the sealing performance at the deformed portion may be deteriorated, or the original function may not be performed. Then, although the countermeasure which prevents a deformation | transformation of a male member and a female member is needed, in the packaging bag with a zipper of patent document 1-patent document 4, such a countermeasure is not taken.

  An object of the present invention is to prevent a male member and a female member constituting a zipper from being deformed, and to easily and reliably fit a male member and a female member, and a zipper to which the zipper is attached. It is to provide a packaging bag with.

  The zipper according to the present invention is provided with a pair of male members and female members facing the film constituting the opening of the bag body, the male members and the female members are fitted to form an occlusal portion, In the zipper that allows the opening to be reclosed, a guide is provided in parallel on the film in parallel with the occlusal portion, the distance between the guide and the center of the occlusal portion is 5 mm or less, and the guide is It is characterized by being formed higher than the occlusal part.

  In the zipper according to the present invention, the height of the guide and the distance between the guide and the center of the occlusal portion are set between the guide and the occlusal portion when the male member and the female member are pressed with finger pads. It is preferable to set so that the film on the side where the male member is provided and the film on the side where the female member is provided are not in contact with each other. In the operation of closing the zipper, the guide and the occlusal portion are pressed simultaneously, and the pressing force applied to the zipper can be dispersed.

  In the zipper according to the present invention, it is preferable that at least one guide is provided on each side of the occlusal portion. Since the back surface of the zipper has a concave shape, it is possible to guide the fitting between the male member and the female member and more reliably fit the male member and the female member.

  In the zipper according to the present invention, it is preferable that the top surface of the guide has a flat surface or a groove. The finger pad can be prevented from sliding off the guide.

  The packaging bag with a zipper according to the present invention includes the zipper according to the present invention.

  The present invention relates to a zipper capable of preventing a male member and a female member constituting a zipper from being deformed and easily and reliably fitting a male member and a female member, and a package with a zipper to which the zipper is attached. A bag can be provided.

It is a partial top view which shows an example of the bag body which attached the zipper which concerns on this invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, where (a) shows a state before fitting, and (b) shows a fitted state. It is a perspective view which shows the example of a form of the zipper attached to the bag body, (a) is a form with the top | upper surface of a guide being a flat surface, (b) is a form with the top | upper surface of a guide having a groove part. It is sectional drawing which shows the state which clamped the conventional zipper attached to the bag body with a finger pad.

  Next, the present invention will be described in detail with reference to embodiments, but the present invention is not construed as being limited to these descriptions. As long as the effect of the present invention is exhibited, the embodiment may be variously modified.

  FIG. 1 is a partial plan view showing an example of a bag body to which a zipper according to the present invention is attached. 2A and 2B are cross-sectional views taken along the line AA of FIG. 1, in which FIG. 2A shows a state before fitting, and FIG. 2B shows a fitted state. The zipper 100 according to this embodiment is provided with a pair of male members 20 and female members 30 facing the film 2 (2a, 2b) constituting the opening 5 of the bag body 1 so that the male member 20 and the female member 30 is fitted to form an occlusal portion 50 and the opening 5 can be reclosed. In the zipper, a guide 40 is provided in parallel with the occlusal portion 50 on the film 2, and the guide 40 and the center of the occlusal portion 50 are arranged. The interval S1 with respect to 50a is 5 mm or less, and the guide 40 is formed higher than the occlusal portion 50.

  The bag 1 is composed of a film 2 (2a, 2b). The film 2 is preferably a thermoplastic resin. The thermoplastic resin is, for example, a polyethylene resin, a polypropylene resin, a polyvinyl chloride resin, a polystyrene resin, a polyamide resin, or a polyethylene terephthalate resin. It does not matter whether the film 2 is a single layer or a multilayer. In the case of a multilayer, a laminated film in which two or more thermoplastic resin films are laminated or a laminated film in which one or more thermoplastic resin films are laminated with a sheet of aluminum foil, paper, nonwoven fabric or the like is used. it can. For the purpose of improving the gas barrier property, a gas barrier film can be laminated. Commercially available products such as Besera (registered trademark) R and ET-R manufactured by Kureha can be used as the gas barrier film. Note that the material and configuration of the film 2 can be appropriately selected in consideration of various conditions such as a packaged object to be packaged and a use temperature. Although the thickness of the film 2 is not specifically limited, For example, it is 10-300 micrometers in total thickness.

  The bag body 1 has an opening 5. A seal portion 6 is formed around the periphery of the opening 5 to form an accommodation space 4. The shape of the bag body 1 is not particularly limited, and is, for example, a three-side seal bag, a four-side seal bag, a standing pouch, a gusset pouch, or a modified bag thereof.

  A zipper 100 is provided at a position away from the opening end side 5c by a predetermined distance so that the opening 5 can be closed again. The film 2 (2a, 2b) between the zipper 100 and the opening end side 5c becomes a knob 3 when the zipper 100 is opened.

  As shown in FIG. 1, the knob 3 is preferably provided with one or more anti-slip ribs 9 extending substantially in parallel with the opening edge 5 c and protruding on the inner surface side of the bag body 1. The anti-slip rib 9 has a role to prevent the finger pad from sliding, a role to reinforce the knob 3, and a role to prevent the tabs 3 from sticking to each other when the zipper 100 is opened and closed. The anti-slip rib 9 is preferably formed so as to face the films 2 a and 2 b constituting the knob 3. Furthermore, it is preferable to provide a reinforcing rib 9a having a height higher than that of the anti-slip rib 9 in the vicinity of the opening end side 5c. The reinforcing rib 9a can prevent the film 2 (2a, 2b) on the opening edge 5c from being deformed. Furthermore, the close contact between the knobs 3 can be prevented, and the user can easily open the zipper 100.

  2A, the zipper 100 is attached to the inner surfaces 2a1 and 2b1 of the two opposing films 2a and 2b constituting the opening 5 of the bag body 1, and includes a pair of male members 20 and females. A member 30 is provided. The male member 20 and the female member 30 are engaged with each other to form an occlusal portion 50 as shown in FIG. The occlusal portion 50 seals the accommodation space 4 and encloses an object to be packaged (not shown) in the bag body 1.

  The male member 20 has a foot portion 22 projecting from the inner surface 2a1 of the film 2a toward the female member 30, and a head portion 21 projecting wide from the upper end of the foot portion 22. The cross-sectional shape of the head portion 21 is not particularly limited as long as it can be engaged with and disengaged from the female member 30, but the cross-sectional shape may be tapered from the lower surface 21 b of the head portion 21 toward the upper end portion 21 a of the head portion 21. preferable. Such a cross-sectional shape of the head 21 is, for example, a trapezoidal shape, a circular shape, a semicircular shape, an elliptical shape, or a deformed shape thereof, in addition to a triangular shape as shown in FIG. The cross-sectional shape of the foot portion 22 is not particularly limited, but may be, for example, a triangular shape, a trapezoidal shape, or a deformed shape other than the quadrangular shape shown in FIG.

  The female member 30 projects from the inner surface 2b1 of the film 2b toward the male member 20, and has a first side piece 31 and a second side piece 32 that face each other. A recess 33 is formed between the first side piece 31 and the second side piece 32. The shape of the recessed part 33 should just be a shape which can accommodate the head 21 of the male member 20, and it is good also as a different shape from the head 21 or the same shape. The end portion 31a of the first side piece 31 and the end portion 32a of the second side piece 32 are bent in a hook shape in the direction approaching each other, and the interval S3 between the inlets of the recess 33 is set on the lower surface 21b of the head 21. It is preferably formed narrower than the width (dimension in the left-right direction in FIG. 2) W2. The end 31 a of the bowl-shaped first side piece 31 and the end 32 a of the second side piece 32 are engaged with the lower surface 21 b of the head 21 fitted in the recess 33, and the male member 20 and the female member 30 are fitted. The combined state can be maintained.

  The zipper 100 further includes a guide 40 provided in parallel with the film 2 in parallel with the occlusal portion 50. The guide 40 has a role of supporting between the two opposing films 2a and 2b when the occlusal portion 50 is formed. The guide 40 protrudes from one or both of the inner surface 2a1 of the film 2a on the side where the male member 20 is provided and the inner surface 2b1 of the film 2b on the side where the female member 30 is provided. As an example of the form of the guide 40, as shown in FIG. 2A, the guide 40 is formed by abutting the protrusions provided facing the male member 20 side and the female member 30 side at the upper end. The inner surface 2b1 of the film 2b facing the guide 40 (the film facing the film 2a on the side where the guide 40 protrudes) 2b is a flat surface, and the top surface 40a of the guide 40 is in contact with the flat surface. . In the present embodiment, the latter form is more preferable. In the former form, if the width of the upper end of the ridge is narrow, it may be difficult to make the ridges contact each other, or even if they are brought into contact with each other, the abutting portion is laterally shifted by applying a pressing force. There is a possibility that the role of the guide 40 may not be fulfilled. By adopting the latter form, the guide 40 does not have an abutting portion, so that the two films 2a and 2b facing each other are more stable. Can be supported.

  FIG. 3 is a perspective view showing a configuration example of a zipper attached to a bag body, in which (a) is a configuration in which the top surface of the guide is a flat surface, and (b) is a configuration in which the top surface of the guide has a groove. is there. The cross-sectional shape of the guide 40 is not particularly limited, and is, for example, a quadrangular shape, a trapezoidal shape, a semicircular shape, a circular shape, an elliptical shape, a triangular shape, or a deformed shape thereof. In the zipper 100 according to the present embodiment, the top surface 40a of the guide 40 is preferably a flat surface. For example, in the shape in which the guide 40 and the film 2 are in contact with each other as if the cross-sectional shape is a triangular shape, the finger pad is slid easily from the guide 40, and it is difficult to stably pinch, whereas FIG. In the shape where the guide 40 film 2 is in contact with the flat surface as shown in a), the finger pad can be placed on the top surface 40a of the guide and stably pinched. The shape of such a guide 40 is, for example, a trapezoidal shape in addition to the rectangular shape shown in FIG.

  In the zipper 100 according to the present embodiment, the top surface 41a of the guide 41 preferably has a groove 41b as shown in FIG. Since the top surface 41a of the guide 41 forms the groove portion 41b, a step is formed on the top surface 41a, so that it is possible to further prevent the finger pad from slipping and more stably pinch. The form having the groove part 41b on the top surface 41a is a form similar to the female member 30 and having a high height T4, in addition to the form in which the groove part 41b is formed at the upper part of the square section as shown in FIG. Is included. In this case, the end portion 31a of the first side piece bent in a bowl shape of the female member 30 and the end portion 32a of the second side piece 32 form a two-point support in a cross-sectional view, and the finger pad slips down. Can be prevented and stable clamping can be achieved.

  The width (dimension in the left-right direction in FIG. 3) G of the top surface 40a of the guide 40 is preferably 0.5 mm or more. More preferably, it is 1.0 mm or more. If it is less than 0.5 mm, the finger pad may become slippery from the guide 40 in some cases. Further, the strength of the guide 40 may be insufficient. The upper limit value of the width G of the top surface 40a of the guide 40 is preferably set to 2.0 mm in terms of the apparent balance with the bag body 1. More preferably, it is 1.5 mm.

  An interval S1 between the guide 40 and the center 50a of the occlusal portion 50 is 5 mm or less. More preferably, it is 3 mm or less, Most preferably, it is 2 mm or less. Here, an interval S <b> 1 between the guide 40 and the center 50 a of the occlusal portion 50 is the shortest distance between the side surface of the guide 40 on the occlusal portion 50 side and the occlusal portion 50. By setting the distance S1 between the guide 40 and the center 50a of the occlusal portion 50 within the above range, the guide 40 and the occlusal portion 50 are pushed simultaneously in the operation of closing the zipper 100, and the pressing force applied to the zipper 100 is dispersed. can do. As a result, deformation of the male member 20 or the female member 30 can be prevented. Further, the finger pad can be prevented from entering deeply between the guide 40 and the occlusal portion 50, and the forces Fa and Fb that the finger pad applies to the male member 20 and the female member 30 are the male member 20 and the female member 30. Since it works in the direction which fits appropriately, it can fit more reliably. If the distance S1 between the guide 40 and the center 50a of the occlusal portion 50 exceeds 5 mm, the finger pad enters between the guide 40 and the occlusal portion 50, and an excessive pressing force is applied to the occlusal portion 50, which may cause deformation. There is. Further, the forces Fa and Fb applied to the male member 20 and the female member 30 by the finger pad may work in a direction different from the direction in which the male member 20 and the female member 30 are properly fitted. If it is strongly clamped in a state where it is in contact with 30 at an inappropriate position, the male member 20 and the female member 30 may be deformed. Furthermore, due to the deformation, the male member 20 and the female member 30 may be difficult to fit together, and the original function as a zipper may not be achieved, such as poor sealing at the deformed portion.

  Furthermore, the height (dimension in the vertical direction in FIG. 2) T4 of the guide 40 is formed to be higher than the height T5 of the occlusal portion 50. The height T4 of the guide 40 is preferably more than 0.5 mm and not more than 3.0 mm, and more preferably more than 1.0 mm and not more than 2.5 mm. The height T5 of the occlusal portion 40 is preferably 0.5 mm or more and less than 3.0 mm, and more preferably 1.0 mm or more and less than 2.5 mm.

  The ratio (T4 / T5) between the height T4 of the guide 40 and the height T5 of the occlusal portion 50 is preferably more than 1.0 and 1.5 or less. More preferably, it is 1.2 or more and 1.3 or less. When T4 / T5 is 1.0 or less, the male member 20 or the female member 30 may be deformed when an excessive pressing force is applied to the occlusal portion 50. If T4 / T5 exceeds 1.5, it may be difficult to form the occlusal portion 50.

  In the zipper 100 according to the present embodiment, when the male member 20 and the female member 30 are pressed with the finger pad at the height T4 of the guide 40 and the interval S1 between the guide 40 and the center 50a of the occlusal portion 50, the guide 40 It is preferable to set so that the film 2a on the side where the male member 20 is provided between the occlusal portion 50 and the film 2b on the side where the female member 30 is provided are not in contact with each other. The finger pad deeply enters between the guide 40 and the occlusal portion 50, and the film 2a on the side where the male member 20 is provided between the guide 40 and the occlusal portion 50 and the film 2b on the side where the female member 30 is provided. When contact is made, the forces Fa and Fb applied to the male member 20 and the female member 30 by the finger pad are likely to work in a direction different from the direction in which the male member 20 and the female member 30 are properly fitted, and the zipper is reliably engaged. It may not be possible. On the other hand, by setting the film 2a on the side where the male member 20 between the guide 40 and the occlusal portion 50 is provided and the film 2b on the side where the female member 30 is provided to be in non-contact, the guide 40 and the occlusal portion 50 are pressed simultaneously, and the finger pad can be prevented from entering deeply between the guide 40 and the occlusal portion 50, so that the above-described effects can be achieved.

  FIG. 4 is a cross-sectional view showing a state where a conventional zipper attached to a bag body is sandwiched between finger pads. Since the conventional zipper 900 does not have the guide 40, as shown in FIG. 4, when the male member 12 and the female member 13 are clamped with the finger pads, the back surfaces of the male member 12 and the female member 13 become convex, and the finger If the male member 12 and the female member 13 are pressed against the belly and slid along the longitudinal direction of the zipper 900, the finger pad easily deviates from the back surfaces of the male member 12 and the female member 13. Furthermore, the forces Fa and Fb applied to the male member 12 and the female member 13 by the finger pad may work in a direction different from the direction in which the male member 12 and the female member 13 are properly fitted. If it is strongly clamped while 13 is in contact with an inappropriate position, the male member 12 and the female member 13 may be deformed. Similar to the case shown in FIGS. 1 to 4 of Patent Document 2, even if the distance between the guide (weir-like band) and the occlusal portion is too large.

  In contrast to such a conventional zipper, in the zipper 100 according to the present embodiment, the height T4 of the guide 40 and the interval S1 between the guide 40 and the center 50a of the occlusal portion 50 are set as described above, and then the guide 40 However, it is preferable that at least one is provided on both sides of the occlusal portion 50. By arranging the guide 40 in this way, the films 2 a and 2 b bend inside the bag body 1 between the two guides 40. When the films 2a and 2b are bent toward the inside of the bag body 1, the male member 20 and the female member 30 are pushed out in directions close to each other, so that the forces Fa and Fb applied to the male member 20 and the female member 30 by the finger pad are generated. The male member 20 and the female member 30 work in the direction in which they are properly fitted. Thus, the fitting of the male member 20 and the female member 30 is induced, and the male member 20 and the female member 30 can be easily and reliably fitted. As a result, deformation of the male member 20 or the female member 30 can be prevented. Furthermore, as shown in FIG. 2B, the back surfaces of the male member 20 and the female member 30 are concave. Accordingly, even if the male member 20 and the female member 30 are squeezed by the finger pad and slid along the longitudinal direction of the zipper 100, the finger pad is prevented from deviating from the back surface of the male member 20 and the female member 30, thereby The member 20 and the female member 30 can be easily and reliably fitted. In FIG. 2, a form in which one guide 40 is provided on both sides of the occlusal part 50 is shown, but this embodiment is not limited to this form, and two or more guides 40 are provided on both sides of the occlusal part 50. The guide 40 may be provided. Such a form is, for example, a form in which two guides 40 are provided on both sides of the occlusal part 50, and two guides 40 are provided on the side of the knob 3 than the occlusal part 50 and one is provided on the accommodation space 4 side. is there.

  The material of the male member 20, the female member 30 or the guide 40 is preferably a thermoplastic resin. For example, a polyethylene resin, a polypropylene resin, a polyamide resin, an ethylene-vinyl acetate copolymer resin, ethylene-methacrylic acid It is a copolymer resin. One kind can be used alone, or two or more kinds can be used in combination. Further, the material of the male member 20, the female member 30 or the guide 40 may be the same or different.

  The packaging bag 10 with a zipper which concerns on this embodiment is provided with the zipper 100 which concerns on this embodiment. As described above, the zipper 100 according to the present embodiment prevents the deformation of the male member 20 and the female member 30 constituting the zipper 100, and the male member 20 and the female member 30 can be easily and reliably fitted. Therefore, the zippered packaging bag 10 according to the present embodiment is particularly suitable for applications in which closing and opening are repeated.

  In the packaging bag 10 with a zipper which concerns on this embodiment, it is preferable to have only one occlusion part 50. FIG. In quality control at the time of manufacture of the packaging bag 10 with a zipper, although the test | inspection of the fitting state of the occlusion part 50 is generally test | inspected using a sensor from the opening edge 5c side, When there are two or more occlusion parts 50, In the current quality control method, only one on the opening end 5c side can be inspected, and the fitting state of the occlusal portion arranged on the accommodating space 4 side cannot be inspected.

  Next, the manufacturing method of the packaging bag with a zipper which concerns on this embodiment is demonstrated taking the example of the manufacturing method of the packaging bag 10 with a zipper shown in FIG.1 and FIG.2. First, a male member-side tape having a male member 20 and one guide 40 on each side of the male member 20 is integrally formed with a thermoplastic resin using a known extruder. On the other hand, the female member side tape having the female member 30 is formed. Subsequently, the film 2 (2a, 2b) which comprises the bag body 1 is piled up in the state which pinched | interposed the male member side tape and the female member side tape between inner surfaces. Here, the film 2 (2a, 2b) may be obtained by superimposing two films on the front and back, or by superimposing one film by folding it at the center. This is passed through a tape mounting seal bar having a predetermined interval. The tape mounting seal bar presses the film 2 (2a, 2b) from the outside and applies heat. Thereby, the male member side tape is heat-sealed to the film 2a, the female member-side tape is heat-sealed to the film 2b, and the zipper 100 is attached to the bag body 1. Then, the male member 20 and the female member 30 are fitted. Finally, the periphery is heat-sealed with a seal bar for hermetic sealing to form the seal portion 6, and the packaging bag 10 with a zipper can be obtained.

  In addition, although the case where the zipper 100 and the bag body 1 were separate bodies was demonstrated here, in this embodiment, it does not ask | require whether the zipper 100 and the bag body 1 are a separate body, or it is integral. When the zipper 100 and the bag body 1 are integrated, the male member 20, the female member 30 and the guide 40 are formed on the film 2 constituting the bag body 1 by using a mold instead of forming various tapes. By doing so, it can be manufactured. Moreover, when obtaining a separate body, it is preferable that the material of the zipper 100 is the same as the material constituting the inner surfaces 2 a 1 and 2 b 1 of the film 2 in order to obtain the adhesive strength with the bag body 1.

  Moreover, although the case where the male member 20 and the guide 40 were integrally formed as a male member side tape was demonstrated, in this embodiment, the male member tape which has the male member 20, and the guide tape which has the guide 40 are shape | molded separately. Then, the male member tape and the guide tape may be attached in parallel.

  The male member 20 and the female member 30 can be formed continuously over the longitudinal direction of the zipper 100, or the male member 20 or the female member 30 can be formed intermittently. By forming the male member 20 or the female member 30 intermittently, the male member 20 and the female member 30 are discontinuously fitted, so that the displacement that occurs each time the male member 20 and the female member 30 are fitted together. When the user's fingertip senses and the user hears a sound associated with the displacement at each fitting, whether or not the zipper 100 is properly closed can be sensed based on the sense of touch or sound. .

  Although FIG. 2 shows a form in which the male member 20 is bilaterally symmetric, the present embodiment is not limited to this, and the male member 20 can be bilaterally asymmetric. When the male member 20 is asymmetrical, it is preferable that the size of the lower surface 21b on the accommodation space 4 side is larger than the size of the lower surface 21b on the opening edge 5c side. By doing in this way, since the fitting of the occlusal part 50 can be easily removed from the opening edge 5c side and the fitting of the occlusal part 50 can be made difficult to remove from the accommodation space 4 side, unintentional opening is prevented. However, when you want to open it, you can open it with a small force.

  In FIG. 2, although the 1st side piece 31 and the 2nd side piece 32 which comprise the female member 30 showed the form which is right-and-left symmetrical, this embodiment is not limited to this, The 1st side piece 31 and the 1st piece The two side pieces 32 can be asymmetrical.

  Although FIG. 2A shows a form in which the guide 40 is provided only on the male member 20 side, this embodiment is not limited to this, and the guide 40 is provided only on the female member 30 side or the guide 40 is provided on the male member 20 side. It can be provided on both the member 20 side and the female member 30 side.

  In FIGS. 1 to 3, an embodiment in which at least one guide 40 is provided on both sides of the occlusal portion 50 is shown. However, the present embodiment is not limited to this arrangement, and the guide 40 is picked from the occlusal portion 50 rather than the knob 3. A configuration in which the guide 40 is provided only on the side or a configuration in which the guide 40 is provided only on the accommodation space 4 side of the occlusion portion 50 can be employed.

  At least one guide 40 may be provided, but two or more guides 40 may be provided in parallel. Further, the number of guides 40 may be the same or different from the occlusal portion 50 on the knob 3 side and the accommodation space 4 side.

  The present invention is suitable, for example, as a zipper and a packaging bag with a zipper used for a bag for packaging various articles such as foods, medicines, medical products, and miscellaneous goods.

DESCRIPTION OF SYMBOLS 1 Bag body 2 (2a, 2b) Film 2a1, 2b1 Film inner surface 2a2, 2b2 Film outer surface 3 Knob piece 4 Accommodating space 5 Opening part 5c Opening edge 6 Seal part 9 Anti slip rib 9a Reinforcement rib 10 With zipper Packaging bag 20 Male member 21 Head 21a Upper end 21b of head Head lower surface 22 Foot 30 Female member 31 First side piece 31a First side piece end 32 Second side piece 32a End of second side piece Part 33 Concave part 40, 41 Guide 40a, 41a Guide top surface 41b Groove part 50 Occlusal part 50a Center of occlusal part 100 Zipper 900 Conventional zipper

Claims (5)

A pair of male and female members are provided facing the film constituting the opening of the bag body, the male and female members are fitted to form an occlusal portion, and the opening can be closed again In the zipper to make
In the film, a guide is provided in parallel with the occlusal part,
A zipper characterized in that an interval between the guide and the center of the occlusal portion is 5 mm or less, and the guide is formed higher than the occlusal portion.   The male member between the guide and the occlusal portion is provided when the height of the guide and the interval between the guide and the center of the occlusal portion are pressed by the finger pad of the male member and the female member. 2. The zipper according to claim 1, wherein the zipper is set so that the film on the other side and the film on the side on which the female member is provided are not in contact with each other.   The zipper according to claim 1 or 2, wherein at least one guide is provided on each side of the occlusion portion.   The zipper according to any one of claims 1 to 3, wherein the top surface of the guide has a flat surface or a groove.   A packaging bag with a zipper, comprising the zipper according to any one of claims 1 to 4.

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