JPH048299B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pair of mating surfaces that are placed next to each other with the opening section in between, and at least a portion thereof is provided with concave and convex portions that engage with each other, substantially parallel to the longitudinal direction of the mating surfaces. The present invention relates to a bag closure configured to be tightened while being expanded, and is particularly suitable for use as a closure for bags such as bagged foodstuffs.

These days, from a sanitary standpoint, most kitchen utensils, sweets, and other foodstuffs are sold in bags. However, in actual use, the contents of the bag are rarely used all at once, and the unused portion is often stored by tightening the opened part with a rubber band or the like.

Examples of such bagged foods include seaweed, shaved sushi, sugar, salt, chemical seasonings, and even living things such as cod roe, and confectionery such as amanatto, potato chips, and others. A variety of food items are sold in bags to be taken with you when hiking or traveling.

If such bagged foodstuffs remain after use, it is impossible to leave some of the contents unopened, so temporarily tighten the unsealed part with a nearby rubber band or the like. In this case, it is really troublesome to close the bag and to open it again.

By the way, the reason why there has not been a bag tightening device that can easily tighten the opening part is because there are so many different types of packaging bags that it is easy to use a common packaging bag of different sizes and thicknesses. This was because it was extremely difficult to provide a means for sealing.

The inventor of the present invention has taken this point into consideration and has solved the above-mentioned problems by providing a bag closure that can close the bag with one touch, has a high degree of sealing depending on the use, and has a wide range of applications. It is resolved.

The present invention provides at least a portion of a pair of mating surfaces that are pressed against each other with the unsealing portion in between, provided with concave and convex portions that engage with each other substantially parallel to the longitudinal direction of the mating surfaces, so that the unsealing portion is expanded while the unsealing portion is being expanded. In a bag closure configured to be tightened, the width w of the mating surface is in the range of 2 to 20 mm, the pitch p of the unevenness of the uneven part is in the range of 1 to 30 mm,
The present invention relates to a bag closure characterized in that the height h of the unevenness is set in a range of 0.1p to 5p.
Therefore, the unsealing part is not only held tightly between the pair of mating surfaces, but also even if the unsealing part is accidentally inserted between the pair of mating surfaces, the uneven part Since the bag is tightened while being expanded by the action, the bag is always reliably sealed. Furthermore, the bag can be closed and opened very simply and easily.

1 to 3 for one embodiment in which the present invention is applied to a closure for bags such as bagged foodstuffs.
This will be explained with reference to the figures.

A bag closure 1 shown in FIG. 1 includes a pair of metal pressing parts 2 extending in a bar shape,
An annular connecting portion 3 that connects one ends to each other, and a locking portion 4 provided at the other end of the pair of pressing portions 2.
Consists of etc.

The pair of pressing portions 2 are provided with sine wave-shaped uneven portions 8 on their opposing mating surfaces 5, which can engage with each other when the mating surfaces 5 are pressed against each other as shown by the imaginary lines in the figure. be.

Furthermore, unless the other end of the pair of pressing portions 2 is locked by the locking portion 4, the elasticity of the connecting portion 3 will cause the pair of pressing portions 2 to open at an opening angle (θ) of 10 degrees or more, as shown by the solid line in the figure. kept in condition.

The locking portion 4 is comprised of a known locking means used in the mouth of a shrimp, ie, a pair of protrusions 9 which protrude from the other end of the pressing portion 2 and have a spherical portion 9a at the tip, as shown in FIG.

Therefore, when the pressing portion 2 attempts to close as shown by the imaginary line in the figure, the spherical portions 9a abut against each other, and then, while resisting the elasticity of the projections 9, the spherical portions 9a close as shown in FIG. When the pressing parts 2 are displaced while increasing the mutual distance in the direction perpendicular to the plane of the paper, and the pressing parts 2 are brought closer to each other, the above-mentioned distance decreases beyond the maximum value, so the protrusion 9 returns to the old position by its own elasticity. When trying to return, firmly lock the other end of the pressing portion 2.

By the way, FIG. 2 shows a state in which the closure tool 1 is clamped to the bag body 10 enclosing foodstuffs or the like, and the opening portion 10a is tightened.

That is, the unsealing part 10a of the bag 10 is inserted between the pair of pressing parts 2 shown as solid lines in FIG. 1, and the other ends of the pressing parts 2 are pressed in a direction toward each other to lock the other ends. When the portions 4 try to lock each other, the unsealing portions 10a are stretched to have a uniform thickness in the width direction of the bag body 10, that is, in the direction of arrow A in FIG. 2, due to the effect of the uneven portions. , is strongly sandwiched between the uneven portions 8.

In other words, when the unsealing part 10a is inserted between the pressing parts 2 as described above, the state of the unsealing part 10a is normally as if it had been squeezed by hand or the like. It is clear that if pressure is applied to the unsealing portion 10a, the unsealing portion 10a is unlikely to be completely closed.

However, in the case of the present invention, the unsealed portion 10a in the above state is stretched and pressed by the action of the uneven portion 8 so as to have a uniform thickness, so that the above-mentioned inconvenience does not occur.

Moreover, the uneven portion 8 is similar to the unsealing portion 10a and the mating surface 5.
Since the contact surface between the unsealing part 10a and
The effect of tightening is further promoted by the uneven portion 8.

Reference numerals 11a and 11b in FIG. 1 represent an engaging protrusion and an engaging recess, which engage with each other when the unsealing section 10a is tightened, and a portion of the unsealing section 10a protrudes from the seam 5, resulting in incomplete tightening. This is a means to prevent this from happening.

By the way, the above-mentioned effects of the uneven portion 8 are obtained if the number n of the uneven portions is in the range of 20 to 40, and the length l of the uneven portion shown in Fig. 1 is in the range of 10 to 100 mm, preferably 20 to 60 mm. The width w of the mating surfaces shown in Figure 3 is in the range of 2 to 20 mm, preferably 5 mm.
~10mm, the pitch p of the unevenness shown in the same figure is in the range of 1~30mm, and the height h of the unevenness shown in the same figure satisfies the following conditions: 0.1p≦h≦5p , the effect tends to be particularly pronounced.

Further, according to experimental results, the value of pitch p is preferably in the range of 1 to 10 mm, more preferably 1 to 5 mm.
It is good that it is within the range of .

In addition, when the pitch p value is less than 0.5 mm, or when the height h value exceeds 5p, the opening part 10
When the number of unevenness exceeds 40, when the pitch p value exceeds 50 mm, or when the height h value is less than 0.1 p, the above effects tend to be further enhanced. is not really recognized.

Next, FIG. 4 shows a concavo-convex portion 14 which is a second embodiment of the present invention. In the following examples,
Since the configuration excluding the uneven portions is the same as that of the first embodiment, FIGS. 1 and 3 are used instead, and drawings other than those showing a part of the uneven portions are omitted.

Incidentally, the uneven portion 14 has a shape in which line segments and circular arcs are arranged alternately. Further, the preferred ranges of the number n of unevenness, the length l of the uneven portion 14, the width w of the mating surface 5, the pitch p of the unevenness, the height h of the unevenness, etc. are the same as in the above embodiment.

Next, FIG. 5 shows the uneven portion 15 of a third embodiment of the present invention, and the uneven portion 15 in this case is as follows.
The shape is made up of two types of sine wave-shaped unevenness with different pitches. Note that when the uneven portion 15 is formed into such a shape, the effect of expanding the unsealing portion 10a tends to be particularly noticeable.

Further, FIG. 6 shows a cross section of a concavo-convex portion 16 according to a fourth embodiment of the present invention.
The shape of the uneven portion 16 along the longitudinal direction of the mating surface 5 is exactly the same as that of the first embodiment already shown in FIG. Unlike the embodiment, the uneven portion 16a is not uniform, but consists of circular arcs and line segments.

Note that the shape of the uneven portion 16a in the width w direction may be a plurality of arcs and line segments arranged alternately.
It can also be shaped like a sine wave.

Although the present invention has been described above with reference to examples, the above-mentioned examples do not limit the present invention, and various changes can be made based on the technical idea of the present invention. For example, the pair of pressing portions 2 in the embodiment were configured to open and close by rotating around the connecting portion 3, but they may also be configured to open and close by moving parallel to each other.

Further, the material of the fastener 1 is not limited to metal, but synthetic resin can also be used. In the case of synthetic resin,
It may be an α-olefin polymer such as polyethylene or polyolefin, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer resin, polyacetal resin, polybutadiene, butadiene-styrene copolymer, neoprene resin, or the like.

In addition, the embodiment was an example in which the present invention was applied to a closure for bags such as bagged foodstuffs, but the closure for bags according to the present invention can be applied to closures for all kinds of bags. Applicable. In this case, the size of the fastener may exceed the range described in the embodiments depending on the size of the bag, but such a fastener is naturally included within the scope of the present invention.

Since the present invention has the above-mentioned configuration, the unsealing part is not only sandwiched and tightened between the pair of mating surfaces, but also inserted into the pair of mating surfaces in a state in which the unsealing part is randomly squeezed. Even if the bag body is stretched, it is tightened while being expanded by the action of the uneven portion, so that the bag body is always reliably sealed even if its size and thickness vary. Furthermore, the bag can be closed and opened very simply and easily. Further, even if the above-mentioned closing is repeated frequently, there is almost no risk of damaging the above-mentioned bag body.

[Brief explanation of drawings]

1 to 3 show a first embodiment in which the present invention is applied to a closure for bags such as bagged foodstuffs, and FIG. 1 is a side view of the closure, and FIG. 2
The figure is a front view of the same fastening tool attached to the opening part, FIG. 3 is a perspective view showing a part of the uneven part of the same fastening tool,
Moreover, FIGS. 4 to 6 show a part of the uneven portions of the second to fourth embodiments of the present invention, respectively. FIG. 4 is a side view of the second embodiment, and FIG. 5 is a side view of the second embodiment. FIG. 6 is a side view of the embodiment of the third embodiment, and FIG. 6 is a sectional view of the fourth embodiment. In addition, in the symbols used in the drawings, 1... Closing tool, 5... Matching surface, 8... Uneven part, 10... Bag body, 10a... Opening part, 14...
Uneven part, 15... Uneven part, 16... Uneven part, 16
a...It is an uneven portion.

Claims (1)

[Scope of Claims] 1. A pair of mating surfaces that are pressed against each other with the unsealing section in between are provided with uneven portions that engage with each other in at least part of each other, substantially parallel to the longitudinal direction of the mating surfaces, so that the unsealing section can be expanded. In a bag closure configured to be tightened while being stretched, the width w of the mating surface is set in a range of 2 to 20 mm, the pitch p of the unevenness of the uneven portion is set in a range of 1 to 30 mm, and A bag closure device characterized in that the height h of the unevenness is set in the range of 0.1p to 5p.