Compression bag

Abstract

To provide a compression bag that can smoothly exhaust air without a valve. 【Solution means】A bag body 41 having a front sheet and a rear sheet, an opening / closing port extending in the left-right direction connecting the storage part inside the bag body 41 and the outside, and the opening / closing port is provided with a chuck 47 that can be opened and closed. Pressure is applied to the bag body 41 to discharge air from the opening / closing port to a compressed state, and the compressed state is maintained by closing the chuck 47. A first point seal 11 for sealing the front sheet and the rear sheet is formed in the vicinity of the chuck 47 of the bag body 41. The first point seal 11 is arranged near one of the left and right sides of the bag body 41, and the section between this and the side seal 44 on one side is taken as the air discharge part 31. Pressure is applied to the bag body 41 to discharge air from the air discharge part 31.

Description

Technical Field

[0001] The present invention relates to a compression bag.

Background Art

[0002] Compression bags are used to store bedding such as futons and clothing, or daily necessities, toys, and food. By removing the air inside and closing the chuck, the items to be stored are kept in a compressed state with a reduced volume. In the case of compression bags, compression in the compressed state means that in the case of bedding and clothing, the air inside the items themselves escapes, resulting in literal compression. However, in the case of daily necessities, toys, and food, the items themselves are not compressed, and only the air inside the bag escapes. In the present invention, regardless of whether the items themselves are compressed, the state in which all or part of the air inside the bag has escaped is referred to as compression.

[0003] As such compression bags, those equipped with valves shown in Patent Documents 1 and 2, and those without valves like food compression bags, which only have an openable chuck at the opening, are also known. In the former case, pressure is applied to the bag body with the chuck completely closed, or the suction port of a vacuum cleaner is applied to the valve to suck air out to remove the internal air.

[0004] In the latter case, without completely closing the chuck, the chuck is closed to a slightly open position in front of the side seal of the bag, leaving an exhaust section. By applying pressure to the bag body in an open state, after removing the internal air with the open section of the chuck as an air discharge part, it is set to a completely closed and compressed state. The latter type of compression bag is often applied to relatively small bags, but the inventor of the present invention has tried to apply it to relatively large bags for futons and clothing.

[0005] In the case of a relatively large bag, if the section where the chuck serving as the air discharge part is open is not set to an appropriate length, it takes time to exhaust the air inside the bag. Further, as shown in FIG. 4, it has been found that there is a problem that does not occur in relatively small bags, that is, if the front sheet and the rear sheet of the bag body are bent together from the side seal, air cannot be exhausted unless it is manually corrected.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] An object of the present invention is to provide a compression bag that can smoothly exhaust air without a valve.

Means for Solving the Problems

[0008] The present invention provides an improvement to a compression bag including a bag body having a flexible front sheet and a rear sheet, a storage part inside the bag body, and an opening / closing port extending in the left-right direction connecting the inside and the outside of the bag body, the opening / closing port having an openable / closable chuck, the chuck being harder than the front sheet and the rear sheet, configured to apply pressure to the bag body to discharge air from the opening / closing port to a compressed state, and to maintain the compressed state by closing the chuck. In the compression bag of the present invention, a first point seal for sealing the front sheet and the rear sheet is formed near the chuck of the bag body. The first point seal is disposed near one side of either the left or right side of the bag body, and the section between the first point seal and the one side is used as an air discharge portion. By closing the chuck leaving the air discharge portion, the air can be discharged from the air discharge portion in a discharge opening state where the air can be discharged, and the bag body is configured to be able to apply pressure to discharge air from the air discharge portion.

Effect of the Invention

[0009] The present invention has been able to provide a compression bag capable of smoothly exhausting air without providing a valve. The present invention can be applied not only to relatively large compression bags but also to relatively small compression bags.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Overall Structure of Compression Bag) As shown in Fig. 3, the compression bag according to this embodiment has the left and right sides of the overlapped front sheet 42 and rear sheet 43 made of synthetic resin sealed by side seals 44 by heat welding or the like. The bottom of the front sheet 42 and the rear sheet 43 may be continuous or sealed by heat welding or the like, but it may be implemented by closing through a separate bottom sheet (not shown) folded in two to greatly increase the accommodation welding.

[0012] The top of the front sheet 42 and the rear sheet 43 forms an opening / closing mouth 46 extending in the left-right direction and is provided with a fitting type chuck 47 that can be opened and closed. The space surrounded by the opening / closing mouth 46, the left and right side seals 44, and the closed bottom becomes the storage part 45. A slider 48 that slides left and right along the chuck 47 may be added. The slider 48 may be capable of both opening and closing the opening / closing mouth 46 by sliding, or may be capable of only one of opening and closing.

[0013] In this storage part 45, the object to be stored can be put in, pressure can be applied to the bag body 41, air can be discharged from the opening / closing mouth 46 to be in a compressed state, and the compressed state can be maintained by closing the opening / closing mouth 46. (Regarding the discharge part outlet 32)

[0014] As shown in Fig. 1(A), a first point seal 11 for heat-sealing the front sheet 42 and the rear sheet 43 by heat welding or the like is formed near the opening / closing mouth 46 of the bag body 41. The first point seal 11 is arranged near one side (the right side in the figure) of either the left or right side of the bag body 41. The section between the first point seal 11 and the one side is defined as the discharge part outlet 32. By closing the chuck 47 leaving the discharge part outlet 32, it is made into a discharge opening state where air can be discharged from the discharge part outlet 32, and air can be discharged.

[0015] In this example, a second point seal 21 is formed on the one side. Similar to the first point seal 11, the second point seal 21 seals the front sheet 42 and the rear sheet 43 in the vicinity of the opening / closing mouth 46 of the bag body 41. Also in this example, since a side seal 44 is formed on the one side, the second point seal 21 is formed so as to overlap or be adjacent to the side seal 44. Therefore, in this example, the section between the first point seal 11 and the second point seal 21 is defined as the air discharge part 31.

[0016] The side of the air discharge part 31 closer to the opening / closing mouth 46 is defined as the discharge part outlet 32, and the side farther away is defined as the discharge part inlet 34. The air in the bag body 41 enters the air discharge part 31 from the discharge part inlet 34, passes through the discharge part middle 33, and is discharged to the outside from the discharge part outlet 32.

[0017] The first point seal 11 and the second point seal 21 include an inlet side section 35 in which the distance between the two gradually decreases toward the outside. Thus, when air enters from the discharge part inlet 34, the air discharge part 31 expands in a funnel shape, making it easy to introduce and discharge air. (Regarding the first point seal 11)

[0018] In this example, the first point seal 11 has a substantially rounded shape with no corners on its outer periphery. The substantially rounded shape means a shape with no corners on all of its outer peripheries, including not only a perfect circle but also an ellipse, a semi - circle, a polygon with rounded vertices, a D - shaped form, etc. When discharging air by applying pressure to the bag body 41, pressure is applied to the first point seal 11 from all directions, so the pressure is dispersed by making it a substantially rounded shape with no corners.

[0019] The first point seal 11 in the example of FIG. 1 has an upper side 12 extending along the lower side of the chuck 47, a linear horizontal outer side 14 hanging down from the left end of the upper side 12 via a horizontal upper arc 13, a horizontal lower arc 15 extending downward and inward from the lower end of the horizontal outer side 14, an inner lower arc 16 extending upward and inward from the horizontal lower arc 15, and an inner upper arc 17 connecting the inner lower arc 16 and the upper side 12. (Regarding the second point seal 21)

[0020] The second point seal 21 is formed substantially symmetrically with respect to the left and right of the first point seal 11. In this example, except for the portion overlapping with the side seal 44, it has a shape including an inner lower arc 16 extending upward inside and an inner upper arc 17 connected to the inner lower arc 16. (Regarding each part of the point seal)

[0021] The upper side 12 extends along the lower side of the opening / closing port 46 and is linear. It is preferable that the upper side 12 is in contact with the lower side of the opening / closing port 46 or is arranged at an interval within 3 mm, which can suppress unnecessary bending of the sheet, apply no extra resistance, and facilitate opening during discharge.

[0022] Considering that when the bag body 41 is filled with the object to be stored, the content rubs against the first point seal 11 and a pressure to expand is applied, the outer horizontal side 14 is preferably a straight line of 5 mm or more in terms of suppressing the occurrence of sheet breakage.

[0023] The inner lower arc 16 defines the inlet of the discharge part 34 and preferably extends obliquely upward from the end of the lower horizontal arc 15 to the upper inside. Thereby, the air pressurized from the inlet of the discharge part 34 to the air discharge part 31 is smoothly introduced by opening the front sheet 42 and the rear sheet 43 in a funnel shape. In the example of FIG. 1(B), the upper end of the inner lower arc 16 reaches about the middle of the air discharge part 31, is connected to the inner upper arc 17, and is connected to the upper side 12. Thereby, a discharge part middle 33 with the narrowest left and right width is arranged in the middle in the vertical direction of the air discharge part 31 and is discharged to the outside from the discharge part outlet 32.

[0024] In the example of FIG. 2, the upper end of the inner lower arc 16 reaches near the upper end of the air discharge part 31, is connected to the inner upper arc 17, and is connected to the upper side 12. Thereby, the section that opens in a funnel shape becomes longer and is introduced more smoothly. Thus, it is desirable that the inner lower arc 16 reaches at least about two-fifths of the vertical direction of the air discharge portion 31. (Regarding the crease of the sheet)

[0025] As described above, in these embodiments, it is advantageous in that the pressurized air from the discharge portion inlet 34 to the air discharge portion 31 is smoothly introduced by opening the front sheet 42 and the rear sheet 43 in a funnel shape. However, as something that obstructs the air flow during exhaust, there is a problem that creases (see FIG. 4) occur in the front sheet 42 and the rear sheet 43, and the exhaust does not proceed smoothly.

[0026] This problem was not predicted by the inventor at the initial design stage. However, by repeating the trial production and testing, effective solutions could be found, leading to the completion of the present invention. That is, as shown in FIG. 1, it is appropriate that the first point seal 11 is configured to satisfy either of the following conditions X and condition Y.

[0027] First, condition X is that the lower part of the first point seal has a substantially straight portion of 5 mm or more, and the extension line X of the substantially straight portion intersects the chuck. Specifically, it is a case where the lower part of the first point seal 11 has a substantially straight portion 11X of 5 mm or more. In this case, as shown in FIG. 1(C), as the compression occurs, a crease tends to form along the extension line X of the substantially straight portion 11X. At that time, when the extension line X of the substantially straight portion 11X intersects the side seal 44, since the front sheet 42 and the rear sheet 43 are soft, the generation of the crease cannot be suppressed. However, since the chuck 47 is harder than the front sheet 42 and the rear sheet 43, the generation of the crease can be suppressed when the extension line X intersects the chuck 47.

[0028] Next, the condition Y is configured such that there is no substantially straight portion of 5 mm or more below the first point seal, and a folding virtual line Y connecting the lowermost point of the first point seal (i.e., the point farthest from the opening / closing port) and the innermost point of the first point seal (i.e., the point closest to the one side of the bag body) intersects with the chuck. Specifically, the condition Y is a case where there is no substantially straight portion of 5 mm or more below the first point seal 11. Even in this case, as shown in FIG. 1(B), although there is a possibility of a crease forming starting from the first point seal 11, if the folding virtual line Y connecting the lowermost point of the first point seal 11 (i.e., the point farthest from the opening / closing port) and the innermost point of the first point seal (i.e., the point closest to the one side of the bag body) intersects with the relatively rigid chuck 47, the generation of a crease along the folding virtual line Y can be suppressed, and exhaust can be performed smoothly.

[0029] On the other hand, as shown in FIG. 1(D), even if the inclination angle of the folding virtual line Y is large, when the first point seal 11 is vertically long or a plurality of them are provided vertically, the position of the folding virtual line Y is low and intersects with the side of the bag body 41 (side seal 44), and a crease is likely to occur.

[0030] When such a crease occurs, air conduction at that portion becomes impossible, and the air has to bypass the crease or flow into the air discharge portion 31 through a slightly opened crease, making it difficult to perform smooth exhaust. The present invention has achieved a compression bag that can realize smooth exhaust by solving such various problems.

Explanation of Reference Numerals

[0031] 11: First point seal 12: Upper side 13: Horizontal upper arc 14: Horizontal outer side 15: Horizontal lower arc 16: Inner lower arc 17: Inner upper arc 21: Second Point Seal 31: Air Discharge Port 32: Discharge Port Exit 33: Discharge Port Middle 34: Discharge Port Entrance 35: Entrance Side Section 41: Bag Body 42: Front Sheet 43: Rear Sheet 44: Side Seal 45: Storage Section 46: Opening / Closing Port 47: Chuck 48: Slider X: Extension Cord Y: Folding Virtual Line

Claims

1. The bag body has a flexible front sheet and a rear sheet, and an opening and closing opening extending in the left-right direction connects the inside storage section of the bag body to the outside, The opening has an openable and closable zipper, the zipper is harder than the front sheet and the rear sheet; A compression bag configured to apply pressure to the bag body, discharge air from the opening and closing opening to create a compressed state, and maintain the compressed state by closing the zipper, a first point seal is formed in the vicinity of the zipper of the bag body to seal the front sheet and the rear sheet; The first point seal is disposed near one side of either the left or right side of the bag body, The section between the first point seal and the one side edge is an air exhaust section, This compression bag is characterized in that by closing the zipper leaving the air exhaust section, it is possible to create an exhaust opening state in which air can be exhausted from the air exhaust section, and by applying pressure to the bag body, air can be exhausted from the air exhaust section.

2. At least one of the left and right sides of the bag body is formed by a side seal that seals the front sheet and the rear sheet, A second point seal is formed in the vicinity of the zipper of the bag body to seal the front sheet and the rear sheet, The second point seal is disposed so as to overlap or be adjacent to the side seal of the bag body, The section between the first point seal and the second point seal is the air exhaust section, the air discharge section has a discharge section outlet on the side closer to the opening and closing, and a discharge section inlet on the side farther from the opening and closing, and air within the bag body enters the air discharge section from the discharge section inlet and is discharged to the outside from the discharge section outlet, The first point seal and the second point seal have an inlet side section in which the distance between them gradually decreases toward the outside, 2. The compression bag according to claim 1, wherein the first point seal has an outer periphery that is substantially rounded without any corners.

3. The compression bag described in claim 2, characterized in that the first point seal has an approximately rounded shape having an upper edge extending along the lower edge of the zipper, a straight horizontal outer edge hanging down from the end of the upper edge via a horizontal upper radius, a horizontal lower radius extending downward and inward from the lower end of the horizontal outer edge, an inner lower radius extending upward and inward from the horizontal lower radius, and an inner upper radius connecting the inner lower radius and the upper edge.

4. 3. The compression bag according to claim 2, wherein the first point seal is configured to satisfy either the following condition X or the following condition Y: Condition X is that the first point seal has a substantially straight portion of 5 mm or more at its lower portion, and that an extension line X of the substantially straight portion intersects with the zipper. Condition Y is that the lower part of the first point seal does not have an approximately straight portion of 5 mm or more, and the virtual fold line Y connecting the lowest point of the first point seal (i.e., the point farthest from the opening and closing opening) and the innermost point of the first point seal (i.e., the point closest to the one side edge of the bag body) is configured to intersect with the zipper.

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