JPH11180453A - Bag with zipper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag with a zipper whose male part and female part fit easily, which is superior in preventing its contents from leaking and in easy handling. SOLUTION: This bag 10 with a zipper 3 structured to form sealed space 4 by the zipper 3 comprising a male part 8 and a female part 9 is provided with a protrusion extending along both sides of the male part 8, and the height B of the protrusion in an unloaded condition is structured bigger than the height C of the male part. Because of this, when the male part 8 and the female part 9 are to be engaged, the protrusion touches an inner face 11b stabilizing the relative positional relation of the male part 8 and the female part 9, facilitates the engagement of the male part 8 and the female part 9 and then stabilizes the running of the thick of a finger along the zipper 3. After the bag in which liquid is stored is engaged, the chuck is hardly penetrable because the protrusion stops the flow of the liquid. Furthermore, compared with a bag with a protrusion on the female part 9 side, a bag end part is softener, and in forming, it is not necessary to form a groove corresponding to the protrusion on the female part 9 side in a metal mold.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag with a zipper, and more particularly, to a bag with a zipper that seals food, medicine, and the like with a zipper having a male part and a female part.

[0002]

2. Description of the Related Art As a bag used for packaging foods and medicines, a bag with a chuck in which a chuck comprising a male part and a female part is provided on the inner surface of a bag having an opening is known.
Such a bag with a zipper is widely used because it is easy to handle and convenient for storing and preserving a small portion. Such a bag with a zipper is required to be easily engaged with the male part and the female part and to have a sealing property from the viewpoint of improving the easiness of handling and the preservability of the contents.

[0003] Such a bag with a chuck is disclosed, for example, in Japanese Utility Model Publication No. 63-57315. In the bag with a chuck described in this publication, a pair of protrusions extend along both sides of the male portion on the inner surface of the bag, and the height thereof is lower than that of the male portion. 6-5
As disclosed in Japanese Patent No. 7831, there is also known a bag with a chuck in which a pair of projections extend not only on both sides of a male part but also on both sides of a female part.

[0004]

However, in the bag with a chuck described in Japanese Utility Model Publication No. Sho 63-57315, the male part and the female part are engaged because the projection is lower than the male part. In this case, when the finger pad is run while being pressed from the outside of the bag along the male part and the female part, the running of the finger pad is not stable, and the male part and the female part are not easily engaged with each other. In addition, when the liquid contents are stored in the bag, the contents may exceed the protrusions and invade the chuck in a state where the male part and the female part are engaged, and the contents may leak from the chuck.

On the other hand, in the bag with a chuck described in Japanese Utility Model Laid-Open No. 6-57831, a pair of projections are provided not only on both sides of the male portion but also on both sides of the female portion, so that the end of the bag becomes hard. For this reason, when the contents are stored in the bag, the end of the bag may be turned outward so that the contents do not adhere to the chuck, but handling is difficult.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a zipper-equipped bag excellent in ease of engagement between a male part and a female part, prevention of leakage of contents, and easy handling.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a bag with a chuck in which a sealed space is formed by a chuck consisting of a male part and a female part, and a pair of bags extending along both sides of the male part. It has a protrusion, and in a no-load state, the height of the protrusion on the sealed space side of the pair of protrusions is larger than the height of the male portion. Here, the no-load state refers to a state in which the projection stands upright from the inner surface of the bag without being bent.

According to the present invention, when the male portion and the female portion are engaged with each other, the projection first comes into contact with the inner surface of the bag on the female portion side. And the relative positional relationship between the female part and the female part is stabilized. Therefore, the ease of engagement between the male part and the female part is improved, and the running of the finger pad along the chuck is stabilized. Further, after the male part and the female part are engaged with each other, even if a liquid content or the like is contained in the sealed space, the content is blocked by the projection on the sealed space side, and the chuck is hardly immersed. Furthermore, the end of the bag is softer than when the protrusion is provided on the female part side, and it is not necessary to form a groove corresponding to the female part side protrusion in the mold during molding.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a bag with a zipper according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view showing a preferred embodiment of a bag with a zipper according to the present invention, and FIG. 2 is a partially omitted sectional view taken along line AA of FIG.

As shown in FIG. 1, a bag 10 with a chuck is provided.
Has a chuck 3 inside a synthetic resin bag main body 1 having an open end 2 formed therein, and both side edges extending from the open end 2 to the bottom of the bag main body 1 have heat-sealed portions 7a, 7b
It has become. In addition, two convex liquid-tight seals 6 extend substantially parallel to the chuck 3 on the surfaces 5a, 5b between the chuck 3 and the opening end 2 of the bag inner surfaces 11a, 11b.

As shown in FIG. 2, the chuck 3 comprises a male portion 8 and a female portion 9 provided at predetermined positions on the inner surfaces 11a and 11b of the bag body 1 from the opening end 2 respectively. The male part 8 extends from the heat fusion part 7a to the heat fusion part 7b along the inner surface 11a, and the female part 9 extends from the heat fusion part 7a to the heat fusion part 7b along the inner surface 11b, Both ends of the male part 8 and the female part 9 are respectively heat-sealed parts 7a of the bag 1,
7b is heat-sealed. Therefore, when the male part 8 and the female part 9 engage with each other, the sealed space 4 is formed by the chuck 3 and the bag inner surfaces 11a and 11b.

More specifically, as shown in FIG. 3, the female portion 9 has a base portion 17 provided on the inner surface 11b of the bag body portion 1 and a hook-like portion extending along both sides of the base portion 17 along the base portion 17. The base 17 and the engaging pieces 18a and 18b form a recess 15. On the other hand, the male portion 8 includes a base portion 19 and a head portion 16 provided at the tip of the base portion 19. On both sides of the male portion 8, a pair of protrusions 13 extending substantially parallel to the male portion 8 are provided. 14
Is provided. The head 16 of the male part 8 is accommodated in the concave part 15 of the female part 9 so that the male part 8 and the female part 9 engage with each other.

Here, the height of the projections 13 and 14 provided on both sides of the male portion 8 is larger than the height of the male portion 8. As shown in FIG. 4, the heights of the projections 13 and 14 are as follows.
In the no-load state, the protrusions 13 from the inner surface 11a of the bag body 1 to the tops 13a, 14a of the protrusions 13, 14
14 and the height C of the male portion 8 refers to the height along the male portion 8 from the inner surface 11a of the bag body 1 to the top 16a of the male portion 8. In addition, the no-load state refers to a state in which the protrusions 13 and 14 stand up from the bag inner surface 11a without being bent by the bag inner surface 11b. The reason why the projections 13 and 14 are higher than the male portion 8 is to sufficiently prevent the contents from immersing the chuck 3 when the contents are stored in the bag 10. is there. In addition, from such a viewpoint, the protruding portions 13 and 14 are
It is preferable to contact the bag inner surface 11b in a state where the and the female portion 9 are engaged. In this case, the projections 13 and 14
For example, as shown in FIG. 2, it is preferable that the cross-sectional shape in the direction perpendicular to the protrusions 13 and 14 is tapered in order to make the front end thereof bend with respect to the bag inner surface 11b.

When the projections 13 and 14 are higher than the male part 8 as described above, when the male part 8 and the female part 9 are engaged with each other, first, the projections 13 and 14 are attached to the inner surface 11b of the bag on the female part 9 side. Due to the contact, the inner surface 11b of the bag is pressed by the projections 13 and 14, and as a result, the relative positional relationship between the male portion 8 and the female portion 9 is stabilized. Accordingly, the ease of engagement between the male part 8 and the female part 9 is improved, and the running of the finger pad along the chuck 3 when the male part 8 and the female part 9 are engaged. In addition, male part 8
Even after the female part 9 is engaged with the female part 9, as shown in FIG.
The protrusion 13 comes into contact with the inner surface 11b. Therefore, even if a liquid content or the like is stored in the sealed space 4, the content toward the chuck 3 is blocked by the projection 13, and the chuck 3 is hardly immersed. Therefore, it is possible to sufficiently prevent the contents contained in the sealed space 4 from leaking from the chuck 3. Also, even if the liquid content is the chuck 3
Even if the bag 10 is soaked and the sealing property of the bag 10 is reduced, the liquid content leaking from the chuck 3 is blocked by the projections 14, so that the leak can be reliably prevented.

Furthermore, since no protrusion is provided on the female portion 9 side, the bag end is softer than when a protrusion is provided on the female portion 9 side. For this reason, when the contents are stored in the bag 10, the handling operation becomes easy even when the end of the bag 10 is used by being turned outward. Further, in molding, it is only necessary to form grooves corresponding to the projections 13 and 14 on the male part 8 side in the mold, and it is not necessary to form grooves corresponding to the projections on the female part 9 side. Therefore, no labor is required for the production of the mold, and the production efficiency of the bag 10 is improved.

With respect to such projections 13, 14, the height B of the projections 13, 14; the ratio of the height B to the width D of the projections 13, 14; the width D of the projections 13, 14; Specifically, the interval A between the male and female parts 8 and 13 is as follows.

That is, the height of each of the projections 13 and 14 is 1.1 relative to the height of the male part 8 in a no-load state.
It is preferably up to 2.5 times the height. When the ratio is less than 1.1, when the male part 8 and the female part 9 are engaged with each other, the respective projections 13 and 14 do not come into contact with the inner surface of the bag on the female part 9 side. This is because the inner surface of the bag on the female part 9 side is not sufficiently pressed, and the relative positional relationship between the male part 8 and the female part 9 tends to be unstable. If the ratio exceeds 2.5, when the male part 8 and the female part 9 are engaged with each other, the bending of the projections 13 and 14 becomes too large, and each of the projections 13 and 14 becomes the male part 8 or the female part. This is because there is a tendency to cover the part 9. The length of the male part 8 is usually 0.5
To 2.2 mm, and preferably 0.7 to 1.8 mm.

Further, the projection 1 has a tapered cross section.
It is preferable that the ratio of the height B of the projections 13 and 14 to the width D at the root of the bases 3 and 14 is 0.2 to 10. this is,
If the ratio of the height B to the width D is less than 0.2, the chuck 3
In addition, since the protrusions 13 and 14 are hardened, it is difficult to turn the bag end, and it is difficult to fuse both ends of the chuck 3 when forming the heat-sealed portions 7a and 7b of the bag 10. Because there is. If the ratio of the height B to the width D exceeds 10, when the male part 8 and the female part 9 are engaged with each other, the bending of the projections 13 and 14 becomes too large, and each of the projections 13 and 14 becomes male. This is because there is a tendency to cover the part 8 or the female part 9. The width D of the projections 13 and 14 is 0.2 to 3
mm. This means that the width D is 0.2mm
If the width D is less than 3 mm, it tends to be difficult for the resin to flow along the groove. And the protruding portions 13 and 14 become hard, so that it is difficult to turn the bag end, or the heat-sealed portions 7a and 7b
This is because there is a tendency that it is difficult to fuse both ends of the chuck 3 when forming the groove.

Further, the distance A between each of the projections 13 and 14 and the male part 8 is preferably 0.8 to 7 mm. As shown in FIG. 4, the distance A between the male portion 8 and each of the projections is defined by the center of the root of the male portion 8 and each of the projections 13 and 1.
4 means the distance from the center of the root. If the gap A is less than 0.8 mm, the female part 9 and the projections 13 and 14 tend to interfere with each other when the chuck 3 is fitted, and the fitting tends to be insufficient, and the gap A exceeds 7 mm. When the male part 8 and the female part 9 are engaged with each other by being pressed from the outside of the bag 10 with the thumb and the index finger, the pressing by the finger pad does not work well. This is because there is a tendency that the portion 9 does not mesh well and must be repeatedly pressed.

The present invention is not limited to the embodiment described above. For example, in the above embodiment, both the heights of the protrusions 13 and 14 are higher than the male portion 8, but only the protrusion 13 may be higher than the male portion 8. Even in this case, it is possible to sufficiently prevent the contents from entering the chuck 3.

Further, as long as the projection 13 is higher than the male portion 8, it is not always necessary to abut the inner surface 11b in a state where the male portion 8 and the female portion 9 are engaged. Even in this case, the intrusion of the contents into the chuck 3 can be sufficiently prevented as compared with the case where the protrusion is lower than the male portion.

Further, the cross-sectional shape of the projections 13 and 14 can be various shapes other than the tapered shape. For example, the cross-sectional shapes of the protrusions 13 and 14 may be rectangular.

[0024]

As described above, according to the present invention, when the male part and the female part are engaged with each other, first, the protrusion comes into contact with the inner surface of the bag on the female part side, and the male part and the female part are opposed to each other. As a result, the ease of engagement between the male part and the female part is improved, and the running of the finger pad along the chuck is also stabilized. In addition, even after the engagement, the protrusions can be brought into contact with the inner surface of the bag, and even if liquid contents are contained in the sealed space, the contents are blocked by the protrusions, so that leakage of the contents from the chuck is sufficient. Can be prevented. Furthermore, since the bag end portion is softer than the case where the protrusion is provided on the female portion side and it is not necessary to form a groove corresponding to the protrusion portion on the female portion in molding during molding, the contents are stored in the bag. Even when the bag is used by folding the bag end outward when storing the bag, the handling is easy and the bag production efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a preferred embodiment of a bag with a chuck according to the present invention.

FIG. 2 is a partially omitted cross-sectional view along the line AA of FIG. 1;

FIG. 3 is a cross-sectional view showing a state before engagement between a male part and a female part.

FIG. 4 is a cross-sectional view showing the length and width of a male part and a protrusion, and the distance between the male part and the female part.

FIG. 5 is a cross-sectional view showing a state where the contents are directed to a chuck with the liquid contents sealed.

[Explanation of symbols]

4 ... sealed space, 8 ... male part, 9 ... female part, 13 ... protrusion on the sealed space side with respect to the male part, 14 ... protrusion on the open end side with respect to the male part, A ... male part and protrusion , B: height of the projection, C: height of the male part, D: width of the projection. Attorney attorney
Yoshiki Hasegawa

Claims (5)

[Claims] 1. A bag with a chuck, wherein a sealed space is formed by a chuck comprising a male part and a female part, comprising a pair of projections extending along both sides of the male part, wherein the pair of projections is in a no-load state. A bag with a zipper, wherein a height of the protrusion on the sealed space side of the portion is larger than a height of the male portion. 2. The chuck according to claim 1, wherein the height of the projection of the pair of projections opposite to the sealed space is greater than the height of the male portion. bag. 3. The bag with a chuck according to claim 1, wherein the protrusion contacts the inner surface of the bag on the side of the female portion when the male portion and the female portion are engaged with each other. 4. The projection according to claim 1, wherein a cross-sectional shape of the projection is tapered, and a ratio of a height of the projection to a width of a root of the projection is 0.2 to 10. 3
A bag with a zipper according to any one of the above. 5. The bag with a zipper according to claim 1, wherein an interval between the male portion and each of the protrusions is 0.8 to 7 mm.