WO2004026717A1 - Compressive accommodation bag having non-return valve function - Google Patents

Abstract

A compressive accommodation bag comprising a substantially square bag body (11) formed of synthetic resin films (12 and 13) with an opening part (14) for taking in/taking out an article by providing an opening/closing zipper (15) on one side thereof. A non-return valve part (20) is provided on right-triangle parts on both corner parts on the side opposite to the opening part (14) of the bag body (11). This non-return valve part (20) comprises an exhaust passage (22) forming a flat sealed condition by welded parts (f and g) of the films (12 and 13) and a welded part (21), and the exhaust passage (22) introduces the air inside the bag body (11) from a diagonal side part of the right triangle and exhausts the air outside as shown by an arrow (d). In addition, the non-return valve part (20) is in contact with an article accommodation part of the bag body (11). A thin and flexible film may be inserted between the films (12 and 13) so that a non-return valve is provided therein.

Description

 Description Compression storage bag with check valve function

 The present invention relates to a compression storage bag, and more particularly to a compression storage bag for evacuating air inside a bag body to store clothing, bedding, and the like in a compact form. Background art

 2. Description of the Related Art Conventionally, various types of compression storage bags having a check valve function have been provided in order to store clothes in a compact when traveling or the like. For example, as shown in Fig. 17 (A), a bag 1 made of a synthetic resin film is provided with a zipper 3 which can be opened and closed on one side to provide an opening 2 for putting clothes in and out, and a pair on the other side. A compression storage bag provided with a check valve 4 made of a film piece and having an exhaust path 5 is known.

 In this compression storage bag, after clothing is stored in the bag 1 and the zipper 3 is closed, as shown in FIG. 17 (B), the bag 1 is manually wound into the bag. The internal pressure of 1 rises and air is exhausted from the check valve 4 through the exhaust path 5 through the path shown by the arrow a. After the evacuation, the pair of films of the check valve 4 adhere to each other due to the depressurizing action in the bag 1 and keep the inside of the bag 1 airtight.

 By the way, in the compression storage bag, since the check valve 4 and the exhaust path 5 are provided on one side of the bag 1 with a width b, clothing can be stored in the width b portion. However, the storage efficiency was poor.

 Accordingly, an object of the present invention is to provide a compressed storage bag having good storage efficiency and compression efficiency for clothes and the like.

Another object of the present invention is that the check valve portion has a simple structure, so that bag making is easy. An object of the present invention is to provide a compression storage bag that can be used.

Disclosure of the invention

 In order to achieve the above object, the compression storage bag according to the present invention is a substantially rectangular bag made of a synthetic resin film provided with an openable / closable zipper on one side to provide an opening for taking in and out of articles. In the configured compression storage bag, a check valve portion is provided in at least one right-angled triangular portion opposite to the opening of the bag body, and the check valve portion forms a side sandwiching the right angle. And a partially welded portion of the film located in the right-angled triangular portion to form a flat contact state. The exhaust path extends from the hypotenuse of the right-angled triangle to the inside of the bag. The air is introduced and exhausted to the outside, and the check valve portion is in contact with the article storage portion of the bag at the oblique side of a right triangle.

 In the compression storage bag having the above-described configuration, a bag body for storing clothes and the like is wound from the opening side. At this time, the internal pressure of the bag increases, and the air inside the bag is introduced from the oblique side of the right triangle into the exhaust path of the check valve and is exhausted to the outside. After evacuation, the film exposed to the exhaust path adheres to the interior of the bag due to the reduced pressure inside the bag, and the bag is kept airtight. Such close contact is ensured by the fact that the flat, narrow right-angled triangular check valve portion is irregularly affected by the storage part having a large thickness due to the storage contents, and the curl phenomenon or the bending phenomenon always occurs. The airtightness is also maintained well.

 In the compression storage bag according to the present invention, since the air in the bag body is exhausted at the check valve portion provided at least at one corner of the bag body, a separate exhaust path is formed in the bag body from the check valve portion. It is not necessary to store the clothes and the like efficiently by using the inside of the bag body.

By the way, when the bag is rolled in from the opening side, the opposite side from the opening There is a tendency for air to collect and remain in the corners. However, in the compression storage bag according to the present invention, since a check valve portion for bleeding air is provided at a corner opposite to the opening, most of the remaining air can be exhausted, Exhaust Compression efficiency is good.

 In the compression storage bag according to the present invention, it is preferable that the check valve portion is formed at two corners opposite to the opening of the bag body. If the check valve is formed at two corners, the exhaust Z compression efficiency will be further improved.

 The check valve portion may be formed by a facing surface of a synthetic resin film constituting the bag body. In this case, since the check valve portion is constituted by the synthetic resin film itself of the bag, the structure is simple and the bag can be easily manufactured. It is preferable to use a soft material for the synthetic resin film.

 Further, the check valve portion may be made of a thin synthetic resin film inserted between the synthetic resin films constituting the bag body. By forming the check valve with a thin film, the sealing effect after exhaust is improved.

 The compression storage bag according to the present invention can store not only clothes and bedding but also bulky articles such as vegetables. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 (A) is a perspective view showing a compression storage bag according to a first embodiment of the present invention, FIG. 1 (B) is a perspective view showing a state in which the compression storage bag is being compressed, and FIG. The figure is a plan view showing a compression storage bag according to the first embodiment,

FIG. 3 is an enlarged sectional view showing an opening of the compression storage bag according to the first embodiment, FIG. 4 is an explanatory view showing a bag making process of the compression storage bag according to the first embodiment, and FIG. , (B), (C), and (D) are explanatory views each showing a modification of the check valve portion of the compression storage bag according to the first embodiment. FIG. 6 is a plan view showing a compression storage bag according to a second embodiment of the present invention, FIG. 7 is an enlarged plan view showing a check valve of the compression storage bag according to the second embodiment, and FIG. X—X enlarged sectional view of the figure,

 FIG. 9 is a plan view showing a check valve of the compression storage bag according to the second embodiment, FIG. 10 is an explanatory view showing a bag making process of the compression storage bag according to the second embodiment, FIG. IE view showing a check valve used in bag making of a compression storage bag according to the second embodiment,

 FIG. 12 shows a compression storage bag according to a third embodiment of the present invention, where (A) is a plan view and (B) is a cross-sectional view taken along line PP of (A).

 FIG. 13 is an explanatory view showing a bag making process of the compression storage bag according to the third embodiment, FIG. 14 is a sectional view taken along the line Y--Y of FIG.

 Fig. 15 is a sectional view taken along the line Z-Z in Fig. 13.

 Fig. 16 is an enlarged view of part Q in Fig. 13,

 FIG. 17 (A), (B) Explanatory drawing showing a conventional compression storage bag. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, an embodiment of a compression storage bag according to the present invention will be described with reference to the accompanying drawings.

 (See the first embodiment, FIGS. 1 to 4)

 As shown in FIGS. 1 (A), (B) and FIG. 2, a compression storage bag 1 OA according to a first embodiment of the present invention comprises two synthetic resin films 12 2, 1 constituting the front and back surfaces. 3 are overlapped to form a substantially rectangular bag 11. The bag 11 is welded on three sides (welded portions ί, g, and g are shaded), and one side is an opening 14 for taking in and out of clothing and the like.

As shown in FIG. 3, a zipper 15 composed of a combination of a concave portion 17 and a convex portion 18 is welded to the inner surface side of the opening portion 14. This zipper 1 5 This is a well-known structure in which a concave portion 17 and a convex portion 18 are integrally formed on a base portion 16 by extrusion. The structure and shape of the zipper 15 are arbitrary. The zipper 15 may be formed by extruding it integrally with the films 12 and 13. The zipper 15 is provided in two in order to improve the airtightness of the bag 11. You may. Alternatively, a slider may be attached to facilitate closing of the zipper 15.

 It is preferable that the films 12 and 13 of the bag 11 have a laminated structure. As shown in FIG. 3, the films 12a and 13a on the inner surface side have polyethylene or polypropylene having welding properties. Pyrene or the like is used, and polyamide, polyethylene terephthalate, or the like is used for the outer films 12b and 13b.

 The compression storage bag 10A is characterized in that a check valve portion 20 is provided in a right-angled triangular portion at both corners on the opposite side to the opening 14 of the bag body 11. As shown in FIG. 2, the check valve portion 20 is partially connected to the welded portions f and g forming sides that sandwich the right angle and the films 12 and 13 located in the right-angled rectangular portion. The exhaust path 22 forms a flat close contact state with the welded portion 21. In the exhaust path 22, the air inside the bag 11 is introduced from the hypotenuse of the right triangle, and is exhausted from the non-welded portion g ′ to the outside of the bag 11 as shown by an arrow d.

 The inside of the bag body 11 is a storage portion for clothing and the like except for the check valve portion 20, and the check valve portion 20 is in direct contact with the storage portion at a hypotenuse of a right triangle.

The compressed storage bag 10A having the above structure is configured such that the zipper 15 is opened to store clothes and the like from the opening 14 and the bag 11 is opened from the opening 14 side with the zipper 15 closed. Roll in (see Fig. 1 (B)). At this time, the internal pressure of the bag 1 1 rises, and the air in the bag 1 1 passes through the exhaust passage 2 2 of the check valve portion 20. It is exhausted through (see arrow d). When the bag 11 containing the clothes and the like is compressed into a compact, the exhaust is completed. After the exhaust, the inside of the bag 11 is depressurized, so that the film exposed to the exhaust passage 22 is exposed. The inner surfaces of 12 and 13 are in close contact with each other to prevent backflow, and the inside of the bag 11 is kept airtight. The degree of exhaustability and airtightness in the check valve portion 20 differs depending on the width and length of the exhaust passage 22 and the adhesion between the films 12 and 13. That is, if the width of the exhaust path 22 is wide, short, and linear, the exhaustability is good. On the other hand, in terms of airtightness (return effect), it is preferable that the width of the exhaust path 22 is narrow, long, and curved. The non-return effect is caused by the close contact between the films 12 and 13. If the film is bent or curled, it will always adhere at that position and block the ventilation. Making the exhaust path 22 thinner or longer increases the opportunity and certainty of the close contact of the front and back films 12 and 13, but is disadvantageous in terms of exhaust.

 Therefore, the most preferable as the check valve portion 20 is that the exhaust passage 22 keeps a straight shape at the time of exhaust and curls after the exhaust. As in the case of the bag 11, the check valve portion 20 is formed in a right triangle at the corner of the bag 11 so that a part of the air is introduced from the hypotenuse, and the hypotenuse is formed. It comes in contact with the article storage part. Therefore, the exhaust path 22 keeps a straight line parallel to the surfaces of the films 12 and 13 due to the increase in internal pressure during exhaust, and curls or bends at the hypotenuse and flat parts of the right triangle after exhaust is completed. Therefore, it is preferable in terms of exhaustability and airtightness. That is, the right triangular portion is an ideal spot for providing the exhaust path 22, and the hypotenuse is an ideal spot for providing the inlet of the exhaust path 22.

 Further, in the bag body 11, the storage efficiency is improved by the amount that clothes and the like can enter the space indicated by E in FIG.

By the way, when the bag 11 is rolled up from the opening 14 side, the welded portions f and Air is collected at the corners F, F (see FIG. 1 (B)) opposite to the opening 14 by g, g. The bag 11 has a check valve portion 20 at the corners F, F where the air gathers and the internal pressure rises as described above, and the exhaust is provided at the corners F, F. Most of the generated air can be exhausted, and the exhaust compression efficiency is good.

 Next, the automatic bag making process of the compressed storage bag 10A will be described with reference to FIG.

 First, in a first step, the films 12 and 13 drawn from the respective rolls are superimposed, and a zipper 15 is welded to each of the films 12 and 13, and the bottom portion of the bag body (welded portion) f) is welded with a heating bar arranged horizontally. Next, as a second step, the side portion (welded portion g) is welded with a heating bar arranged in the vertical direction. The vertical heating bar also has a heating portion for forming the check valve portion 20, and the welding portion 21 is also welded simultaneously with the welding of the side portions, thereby forming the exhaust passage 22.

 Then, as a third step, films 12 and 13 are cut at the center of the side part (welded part g). Thus, the compressed storage bag 10A can be obtained. The check valve portion 20 may be formed only at one corner of the bag 11, but even if it is provided at both corners, the welding process of the side portion (welded portion g) is performed once. Can be done.

 (Refer to the modified example of the check valve part, Fig. 5)

 In the compression storage bag 1OA of the first embodiment, the check valve portion 20 can have various shapes, and the main shape is shown in FIG. The shape and size of the exhaust path 22 are arbitrarily set according to the amount of exhaust.

The check valve portion 20 shown in FIG. 5 (A) has a straight exhaust path 22 formed by forming a welded portion 21 at a corner of the bag body 11, and the oblique side of a right triangle. Welded part 23 is provided as a weir part, and the exhaust path is indicated by arrow d. You. The top of the corner of the bag 11 is reinforced.

 The check valve portion 20 shown in FIG. 5 (B) is one in which the welded portion 24 is formed in an island shape and an exhaust path 22 is provided, and the exhaust path is indicated by an arrow d. In this case, the outlets of the exhaust path 22 are provided at two non-welded portions f ′ and g ′.

 The check valve portion 20 shown in FIG. 5 (C) forms an island-shaped welded portion 25 and forms a slit 26 in the films 12 and 13 to form an exhaust passage 22. The exhaust path is indicated by arrow d. The island-shaped welded portion 25 ′ is for preventing the exhaust path 22 from being blocked by the stored clothes and the like, and for maintaining the close contact between the films 12 and 13.

 The check valve portion 20 shown in FIG. 5 (D) is formed by forming a welding portion 27 and providing an exhaust passage 22 along the welding portion f, and the exhaust passage is indicated by an arrow d. The island-shaped welded portion 25 ′ is for preventing the exhaust passage 22 from being blocked by the stored clothes and the like, and for maintaining the close contact between the films 12 and 13. .

 In the modified example described above, the welded portions 23, 24, 25, 25 ′, 27 are of course the locations where the films 12, 13 are welded.

 (See the second embodiment, FIGS. 6 to 11)

As shown in FIG. 6, the compression storage bag 10B according to the second embodiment of the present invention is made of two synthetic resin films instead of the check valve portion 20 in the first embodiment. The check valve 30 is provided at both corners of the bag 11 opposite to the opening 14. The other configuration is the same as that of the first embodiment. The same components are denoted by the same reference numerals as those of the first embodiment, and overlapping description will be omitted. As shown in FIG. 7, FIG. 8, and FIG. 9, the check valve 30 is formed by welding two thin and flexible films 31 and 32 (for example, polyethylene) having a welding property. An exhaust path 33 is provided by forming a twig-shaped welded portion 34 and a through hole 35 on the front and back of the bag body 11. Exhaustion The exhaust path through the air path 33 is as shown by the arrow d in FIG.

 Further, the check valve 30 is integrated with the bag body 11 by welding portions f and g. In addition, the welded portion i indicated by oblique lines in FIG. 7 is formed by welding the inner surfaces of the films 12 and 13 of the bag body 11 and the films 31 and 32 of the check valve 30 and leaking air. This is the part that prevents it. When forming the welding portion i, it is necessary to apply a welding inhibition treatment, for example, ink 36 so that the opposing surfaces of the films 31 and 32 are not welded.

 The method of using the compression storage bag 10B having the above configuration is the same as that of the first embodiment, and the operation and effect thereof are also the same. In particular, in the second embodiment, since the thin and soft films 31 and 32 are used as the check valve 30, the non-return effect (maintaining airtightness) after exhaust is excellent. ing.

 Next, an automatic bag making process of the compressed storage bag 10B will be described with reference to FIGS. 10 and 11. FIG.

 Referring to FIG. 10, first, the films 12 and 13 pulled out from the respective rolls are overlapped in the first step, and a zipper 15 and a check are placed between the films 12 and 13. Insert valve 30. Then, the check valve 30 is welded between the films 12 and 13 (welded portion i).

 The check valve 30 supplied in the first step is prepared in advance in a plurality of continuous states. As shown in FIG. 11, the details of the non-return valve connecting body 30 ′ are, as shown in FIG. 11, a pair of non-return valves 30 to be separated later, which are integrated in a back-to-back manner. 1 and 32 are welded (welded part h and welded part 34) to form an exhaust passage 33 and a welding inhibition ink 36 is applied. The connecting body 30 ′ is cut at the cutting line j, and a pair of check valves 30 are inserted between the films 12 and 13 in the first step and Z-welded.

Next, as a second step, using a heating bar 51, each of the films 12 and 13 was heated. Then, a zipper 15 is welded to the bag 11, and a side f of the bag 11 is welded using a heating bar 52. The welding of the side f also serves to weld the films 31 and 32 of the check valve 30 to the films 12 and 13 of the bag 11.

 Then, as a third step, the side portions are welded (welded portion g) using a heating bar (not shown) arranged in the vertical direction. At the same time, a through hole 35 for exhaust is formed. Further, as a fourth step, films 12 and 13 are cut at the center of the side portion (welded portion g). Thus, the compressed storage bag 10B can be obtained. .

 In the second embodiment, an island-shaped welded portion as shown in FIG. 5 may be formed instead of the twig-shaped welded portion 34. Also, a slit may be formed instead of the hole 35 as the exhaust outlet.

 (See the third embodiment, FIGS. 12 to 16)

 As shown in FIG. 12 (A), the compression storage bag 10C according to the third embodiment of the present invention comprises two synthetic resin films instead of the check valve 30 in the second embodiment. A check valve 40 is provided by sandwiching 41, 42 between the films 12, 13 on both sides of one side opposite to the opening 14 at both corners thereof. ·

 The four films 12, 13, 41, and 42 are welded to each other at welds ί and g. At the welded portion k, as shown in FIG. 12 (B), the contact surfaces of the finolems 12 and 41 and the contact surfaces of the films 13 and 42 are welded, and the film 4 is welded. The contact surfaces 1 and 42 are not welded.

In this check valve 40, similarly to the first embodiment, the exhaust path 43 is formed by forming the twig-shaped welded portion 44 (which may be an island-shaped welded portion). Have been. The welding of the welding portion 4 4 is performed simultaneously with the welding of the side portion (welding portion g), and here, four films 1 2, 1 3, 4 1, 4 2 Is welded. The outlet of the exhaust path 43 is a non-welded portion g ′, and only the thin and soft films 41 and 42 (for example, polyethylene) are exposed in the exhaust path indicated by the arrow d. Note that the exhaust outlet may be provided in a part of the welded portion f.

 The welded portion k is provided for the following reason. In other words, this is to prevent the films 41, 42 from hindering the storage when the clothes, etc. are stored from the opening 14, and the finolems 41, 42 are placed on the inner surfaces of the finolems 12, 13. It is stuck to. Also, it is to prevent the intrusion of air from the non-welded portion g ′, which is the exhaust outlet, between the films 12 and 41 and between the films 13 and 42.

 The method of using the compressed storage bag 10C having the above configuration is the same as in the first and second embodiments, and the operation and effect are also the same. Particularly, in the third embodiment, since the long films 41 and 42 are used as the check valve 40, the check valve connecting body 3 is previously set as in the second embodiment. There is no need to create 0 '.

 Next, the automatic bag making process of the compressed storage bag 10C will be described with reference to FIGS.

 Referring to FIG. 13, first, the films 12 and 13 pulled out from the respective rolls are overlapped in the first step, and a zipper 15 and a film 4 are interposed between the films 12 and 13. Insert 1, 42 (see Fig. 14). .

Next, as a second step, a zipper 15 is welded to each of the films 12 and 13 using a heating bar 51, and the films 41 and 42 are attached to the films 1 and 42 using a heating par 53. Weld (weld k) to 2 and 13 respectively. At the time of this welding, a welding inhibition plate 54 is inserted between the films 41 and 42 so that the films 41 and 42 are not welded to each other. See Figure 5). Instead of inserting the plate 54, a welding inhibition ink 36 may be applied as in the second embodiment.

 Next, as a third step, the side portion (welding portion ί) of the bag body 11 is welded using the heating bar 52. The welding of this side portion also serves as a step of welding the films 41 and 42 of the check valve 40 to the films 12 and 13 of the bag body 11. Thereafter, as a fourth step, a side portion (welded portion g) is welded using a heating bar (not shown) arranged vertically. At the same time, the twig-shaped portion of the check valve 40 is also welded (welded portion 44), and the exhaust path 43 and its outlet (non-welded portion g ') are formed (see FIG. 16). Further, as a fifth step, films 12 and 13 are cut at the center of the side portion (welded portion g). Thus, the compressed storage bag 10C can be obtained.

 (Other embodiments)

 The compression storage bag according to the present invention is not limited to the above embodiments, but can be variously modified within the scope of the gist.

 In particular, various resin materials can be used for the films 12, 13, 31, 31, 32, 41, and 42. The detailed configuration and shape of the check valve portion 20 and the check valves 30 and 40 are arbitrary.

 In the third embodiment, the check valve 40 has a structure in which two films are stacked, but one check film is provided between the films 12 and 13 of the bag 11. It may have a sandwiched structure.

Further, the bag making process in the first, second and third embodiments has been described as including the step of welding the zipper 15 to the films 12 and 13. It is also possible to make a bag by fusing using a film to which is attached. In this case, the welded portion f becomes the folded portion of the film. The bag body 11 may be constituted by a so-called gusset bag, and the check valve portion 20 and the check valves 30 and 40 may be provided. It is also possible to provide the check valve portion 20 and the check valves 30 and 40 in a suction and compression storage bag that compresses the bag body by sucking air using a vacuum cleaner or the like. . Industrial applicability

 As described above, the compression storage bag according to the present invention has good air exhaustion efficiency and compression efficiency in the bag body, and is particularly suitable for compactly carrying clothes and the like.

Claims

Range of request 1. In a compression storage bag composed of a substantially rectangular bag made of synthetic resin film with a zipper that can be opened and closed on one side to provide an opening for taking in and out articles,  A check valve portion is provided at least in a right-angled triangular portion at one corner opposite to the opening of the bag body,  The non-return valve portion is composed of an exhaust passage forming a flat close contact state by a weld portion forming a side sandwiching a right angle and a partial weld portion between films located in a right triangular portion. The exhaust path introduces air inside the bag body from the hypotenuse of the right triangle and exhausts it to the outside,  The check valve portion is in contact with the article storage portion of the bag at the oblique side of a right triangle;  A compression storage bag. 2. The compression storage bag according to claim 1, wherein the check valve portion is formed at two corners opposite to the opening of the bag body. 3. The compression storage bag according to claim 1, wherein the check valve portion is formed by a facing surface of a synthetic resin film constituting the bag body. 4. The compression storage bag according to claim 1, wherein the check valve portion is made of a thin synthetic resin film inserted between the synthetic resin films forming the bag body.