Simple sleeping bag

Abstract

To provide a simple sleeping bag that is sufficiently lightweight yet tear-resistant. [Solution] The present invention relates to a simple sleeping bag A formed by sealing a part of a sheet 10 to form a bag shape having an opening 4, wherein the sheet 10 is made of an unoriented olefin film and the thickness of the sheet is 10 to 100 μm, and the front sheet 1 located on the front side of the sheet 10 is provided with through holes 1c with a diameter of 0.5 to 3.5 mm, and the front sheet 1 has a perforated portion 12 in the area where the through holes 1c are provided and a non-perforated portion 11 in the area where the through holes 1c are not provided, and it is preferable that the opening ratio of the through holes 1c in the perforated portion 12 is 0.1 to 16%.

Description

Technical Field

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[0001] The present invention relates to a simple sleeping bag (hereinafter referred to as "simple sleeping bag") that can be used in disasters, outdoors, etc.

Background Art

[0002] So-called disaster prevention goods prepared in preparation for disasters such as earthquakes and typhoons are known. Generally, disaster prevention goods include daily necessities. However, among them, bedding is often omitted because it takes up a lot of space.

[0003] By the way, in the event of a disaster, a situation may occur where one has to sleep in a shelter or the like. For example, in a region with severe cold, without bedding, there is a risk of causing serious problems to the bodies of the disaster victims. On the other hand, in outdoor activities (hereinafter simply referred to as "outdoors"), bedding takes up a lot of space and thus becomes a burden as luggage. Therefore, a lightweight simple sleeping bag is required.

[0004] In response to this, lightweight sleeping bags have been developed. For example, it is composed of a bag body formed by a laminate in which an aluminum vapor-deposited polyester layer, a polyethylene layer, and a water-absorbent non-woven fabric layer are laminated in this order from the outer surface, and is provided with gusset portions formed with folds inward of the bag body on both side surfaces of the bag body. Near the opening of the bag body in the gusset portion, an emergency sleeping bag provided with a fastening member for opening and closing the upper and lower portions of the side surface of the bag body through the folds is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the emergency sleeping bag described in Patent Document 1 above is formed from a laminate in which a polyethylene layer and a water-absorbent nonwoven fabric layer are stacked in that order, and also has a gusset, so it cannot be said to be sufficiently lightweight. Furthermore, considering that these simple sleeping bags will be used in places like evacuation shelters and tents, they need to be sufficiently tear-resistant.

[0007] This invention was made in view of the above circumstances, and aims to provide a simple sleeping bag that is sufficiently lightweight and tear-resistant. [Means for solving the problem]

[0008] The inventor of this invention diligently studied how to solve the above problems and found that the bag-shaped sheet could be made from an unstretched olefin film, and that its thickness could be set within a predetermined range, thereby completing the present invention.

[0009] This invention relates to a simple sleeping bag in which a part of a sheet is sealed to form a bag with an opening, wherein the sheet is made of an unstretched olefin film and the thickness of the sheet is 10 to 100 μm.

[0010] In the simple sleeping bag of this invention, the outer sheet, which is located on the front side of the sheet, is provided with through holes with a diameter of 0.5 to 3.5 mm, and the outer sheet has a perforated area in which the through holes are provided and a non-perforated area in which the through holes are not provided, and it is preferable that the opening ratio of the through holes in the perforated area is 0.1 to 16%. In this case, it is more preferable that the front sheet has a non-perforated section in the center and perforated sections on both sides of the non-perforated section.

[0011] Furthermore, in the simple sleeping bag of this invention, both the front sheet located on the front side and the back sheet located on the back side of the sheet are provided with through holes with a diameter of 0.5 to 3.5 mm, and the front sheet and the back sheet each have a perforated area in the region where the through holes are provided and a non-perforated area in the region where the through holes are not provided, and it is preferable that the opening ratio of the through holes in the perforated area is 0.1 to 16%. In this case, it is more preferable that both the front sheet and the back sheet have a non-perforated section in the center and perforated sections on both sides of the non-perforated section.

[0012] In the simple sleeping bag of this invention, it is preferable that the through-holes are formed by a perforation process using a heat needle method.

[0013] In the simple sleeping bag of this invention, it is preferable that the outer sheet, located on the front side of the sheet, is an unoriented olefin film with inorganic material vapor-deposited on at least its outer surface, and the back sheet, located on the back side of the sheet, is an unoriented olefin film with inorganic material vapor-deposited on at least its outer surface.

[0014] In the simple sleeping bag of this invention, if the sheet is in the shape of a strip, it is preferable that the sheet is folded in the vertical direction and both overlapping sides of the sheet are sealed by heat sealing. Furthermore, if the sheet is tubular, it is preferable that one end of the opening is sealed by heat sealing. [Effects of the Invention]

[0015] The simple sleeping bag of this invention is bag-shaped and can be used as a sleeping bag during disasters or outdoor activities. Furthermore, since the sheet forming the bag is made of an unstretched olefin film and its thickness is within a predetermined range, it has the advantage of being lightweight yet tear-resistant. In other words, because an unstretched material is used, it is resistant to tearing even when stretched. In addition, since a relatively soft olefin-based material is adopted, it can be folded for storage, and has the advantage of not taking up much space.

[0016] For these reasons, the simple sleeping bag of the present invention can be stored in large quantities in a given space. Therefore, it is also possible to send a large quantity at one time to disaster areas, campsites, etc. Also, in each household, it can be easily included as one of the disaster prevention goods. Moreover, it is possible to reduce the burden as luggage to be taken outdoors.

[0017] In the simple sleeping bag of the present invention, by providing a through-hole with a diameter within the above range, the moisture permeability is improved, so that the heat can be prevented from being trapped inside the simple sleeping bag. Also, when not in use, since air can escape from the through-hole, it can be folded more compactly. Also, as the sheet, a relatively soft olefin-based material is adopted and through-holes are provided, so that the sound of the film rubbing (rustling sound) can be reduced.

[0018] Here, in the simple sleeping bag, at least by making the front sheet composed of a perforated part and a non-perforated part, the region for maintaining heat retention and the region for exhibiting moisture permeability can be separated. Thereby, it is possible to exhibit sufficient moisture permeability while ensuring moisture retention. Note that the back sheet is also made of a perforated part and a non-perforated part in the same way, so that even when the user turns over and the sleeping bag twists or is turned inside out, the effect of moisture permeability can be ensured. Also, by setting the aperture ratio of the through-holes per unit area of the perforated part within the above range, appropriate moisture release is possible without inhibiting heat retention.

[0019] In the front sheet of the simple sleeping bag of the present invention, by arranging the non-porous part in the center and providing the porous parts on both sides thereof, it is possible to ensure the heat retention property of the central region where the user lies, and only the excess moisture can be dehumidified from the regions on both sides. Also, by arranging the same way in the back sheet, the dehumidifying property can be adjusted. That is, it is also possible to actively rotate the simple sleeping bag in the width direction to expose the porous part of the back sheet to the front side.

[0020] In the simple sleeping bag of the present invention, since the front sheet is made of a thermoplastic olefin-based material and is manufactured without stretching, through holes can be formed by heat needle perforation. In this case, when providing the through holes, the burrs generated at the periphery of the through holes are also melted, so it is possible to prevent the burrs from remaining. As a result, it will also have an excellent touch.

[0021] In the simple sleeping bag of the present invention, when the front sheet and the back sheet are made of a non-stretched olefin-based film with inorganic matter vapor-deposited on the outer surface, the heat retention effect is further improved. That is, the temperature inside the sleeping bag can be quickly increased. On the other hand, as described above, since through holes are provided, it also has excellent dehumidifying property. Therefore, according to the simple sleeping bag, the internal temperature can be quickly raised, and when the humidity inside the sleeping bag increases over time, it will be dehumidified from the through holes, so it is possible to maintain a comfortable sleep.

[0022] In the simple sleeping bag of the present invention, when the sheet is in a strip shape, the sheet may be folded in the longitudinal direction and both sides where the sheets overlap may be sealed by heat sealing. When the sheet is in a tubular shape, the opening on one side may be sealed by heat sealing. In these cases, the simple sleeping bag can be easily manufactured. As a result, it can be manufactured at a low cost in large quantities. Furthermore, because it uses an unoriented olefin film, even if the sealed portion is unintentionally opened, it can be heat-sealed again in the appropriate position. Furthermore, even if inorganic material is vapor-deposited onto the outer surfaces of the front and back sheets, the unoriented olefin film is exposed on the inner surfaces of each sheet, making it possible to seal them by heat sealing. [Brief explanation of the drawing]

[0023] [Figure 1] Figure 1 is a schematic front view showing a simple sleeping bag according to the first embodiment. [Figure 2] Figure 2 is a vertical cross-sectional view illustrating the sealed portion formed by heat sealing of a simple sleeping bag according to the first embodiment. [Figure 3] Figure 3 is a schematic front view showing a simple sleeping bag according to the second embodiment. [Figure 4] Figure 4 is a schematic front view showing a simple sleeping bag according to the third embodiment. [Figure 5] Figure 5 is a schematic front view showing a simple sleeping bag according to another embodiment. [Figure 6] Figure 6 is a schematic front view showing a simple sleeping bag according to another embodiment. [Modes for carrying out the invention]

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail, with reference to the drawings as necessary. In the drawings, identical elements will be denoted by the same reference numeral, and redundant explanations will be omitted. Furthermore, unless otherwise specified, positional relationships such as up, down, left, and right shall be based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios in drawings are not limited to those shown.

[0025] The simple sleeping bag according to this invention is a so-called simple sleeping bag, and can be used, for example, in evacuation shelters during disasters such as earthquakes and typhoons, or at campsites during outdoor activities. Furthermore, when not in use, the simple sleeping bag is lightweight and can be folded compactly, making it possible to store large quantities and transport many at once. Furthermore, it can be stored in each household as part of their disaster preparedness supplies. Furthermore, it can reduce the burden of carrying it as luggage for outdoor activities.

[0026] In this specification, "head side" refers to the opening side of the sleeping bag A, which is the side where the user's head is located when they enter the sleeping bag A, and "foot side" refers to the bottom side of the sleeping bag A, which is the side where the user's feet are located when they enter the sleeping bag A. Furthermore, "inside" refers to the inner side of sleeping bag A, and "outside" refers to the outer side of sleeping bag A.

[0027] (First Embodiment) Figure 1 is a schematic front view showing a simple sleeping bag according to the first embodiment. As shown in Figure 1, the simple sleeping bag A according to the first embodiment is made by overlapping strip-shaped sheets 10 and sealing the edges on three sides (both sides and the bottom in Figure 1), excluding the opening 4 on the head side. In other words, the simple sleeping bag A has an outer sheet 1 located on the front side, an inner sheet 2 located on the back side, a sealed section 3 with three edges sealed, and an opening 4 with one edge (head side) not sealed. Note that the front sheet 1 and the back sheet 2 are the same size, and when they are placed on top of each other, the positions of their edges coincide.

[0028] Specifically, the simple sleeping bag A is rectangular in shape when viewed from above, with an opening 4 at the head end and sealing sections 3 at the foot end and on both sides. Therefore, since the simple sleeping bag A is bag-shaped, the user can use it as a sleeping bag by entering the simple sleeping bag A through the opening 4. Furthermore, since the simple sleeping bag A does not have a gusset, it is not bulky and can be easily folded. In other words, when not in use, the simple sleeping bag A can be made even more compact by repeatedly folding it.

[0029] In the simple sleeping bag A, an unoriented olefin film is used as the sheet 10 (front sheet 1 and back sheet 2). Examples of unoriented olefin films include olefin films such as polyethylene films and polypropylene films that are manufactured without stretching. Thus, in the simple sleeping bag A, an olefin-based film is used as the sheet 10, making it lightweight, recyclable, and relatively soft, which reduces the rustling sound (crinkling noise) that occurs when the film rubs during use. In addition, it also has excellent acid and base resistance, so it can prevent elution by acids or bases. In the simple sleeping bag A, a non-stretched film is deliberately used as sheet 10, so it is easy to stretch and difficult to tear even when pulled. Furthermore, it offers excellent wear resistance and enables heat sealing, as described later.

[0030] In sheet 10, an inorganic substance is vapor-deposited on one side of an unoriented olefin film. Specifically, the front sheet 1 is an unoriented olefin film with an inorganic substance vapor-deposited on at least its outer surface (opposite to the back sheet 2), and the back sheet 2 is an unoriented olefin film with an inorganic substance vapor-deposited on at least its outer surface (opposite to the front sheet 1).

[0031] Here, the deposition of inorganic material is carried out on one side of the unoriented olefin film using known methods such as vacuum deposition, sputtering, or ion plating. Examples of inorganic materials that can be used include aluminum, alumina, and silica. In other words, unoriented olefin films are subjected to so-called aluminum vapor deposition, alumina vapor deposition, silica vapor deposition, etc. Among these, from the viewpoint of versatility, alumina vapor deposition, which uses alumina as the inorganic material, is preferred. As a result, the simple sleeping bag A will have superior heat retention.

[0032] The thickness of sheet 10 is preferably 10 to 100 μm, and more preferably 10 to 40 μm. If the thickness of sheet 10 is less than 10 μm, it has the disadvantage of being easily torn, and if the thickness of sheet 10 exceeds 100 μm, it has the disadvantage of becoming heavy and difficult to fold.

[0033] In the simple sleeping bag A, multiple through holes 1c are provided at equal intervals in both the outer sheet 1 and the inner sheet 2. Furthermore, the back sheet 2 has the same configuration as the front sheet 1. That is, the back sheet 2 has through holes 1c of the same shape and in the same positions as the front sheet 1. Therefore, a detailed explanation regarding the through-holes in the back sheet 2 will be omitted. As a result, the simple sleeping bag A has superior moisture-wicking properties. Furthermore, by providing the through-hole 1c, the noise generated by the film rubbing during use can be further reduced. Furthermore, by providing a through-hole 1c, air can escape from inside the device when it is folded, making it easier to fold and allowing it to be folded more compactly. Furthermore, by providing through-holes in the back sheet 2, moisture release can be ensured even if the sleeping bag twists or turns inside out when the user turns over in their sleep.

[0034] As a result, in the simple sleeping bag A, the outer sheet 1 and the inner sheet 2 are made of the aforementioned unoriented olefin film to which inorganic material has been vapor-deposited, and through holes 1c are provided in the outer sheet 1 and the inner sheet 2, so that moisture can be released through the through holes when the humidity inside the sleeping bag increases over time while maintaining heat retention. As a result, comfortable sleep can be maintained using the simple sleeping bag A.

[0035] The shape of the through-hole 1c is not particularly limited and can be a slit, round, polygonal, or oval shape, but from the viewpoint of machinability, it is preferably round. Furthermore, the diameter of the through hole 1c is preferably 0.5 to 3.5 mm. If the diameter of the through-hole 1c is less than 0.5 mm, the moisture release may be insufficient compared to when the diameter is within the above range, and if the diameter of the through-hole 1c exceeds 3.5 mm, the heat retention may be impaired compared to when the diameter is within the above range. Note that "diameter" refers to the maximum diameter in the cross-section of the through hole 1c. Incidentally, if the through-hole 1c is round, then "diameter" refers to the diameter.

[0036] Multiple through-holes 1c are provided, and their arrangement is not particularly limited. For example, they may be provided randomly, or they may be provided in a regular arrangement such as a 60° staggered pattern with each vertex of an equilateral triangle, a 45° staggered pattern with each vertex of a square, or a parallel pattern (90° in series). Furthermore, from the viewpoint of efficiently releasing moisture, it is preferable that the through-holes 1c are arranged in a regular pattern. Furthermore, in this case, it becomes easier to control the opening ratio so that it is a predetermined value when creating the through-hole 1c.

[0037] The processing method for forming the through hole 1c is not particularly limited, but examples include punching, perforation, and laser micro-machining. Among these, it is preferable that the through-hole 1c is formed by a hot needle perforation process. In this case, processing can be done at low cost, and the formation of burrs around the periphery of the through-hole 1c can be suppressed. As a result, it also has a superior feel against the skin. Furthermore, since olefin-based films have a relatively low melting point, the temperature of the hot needle can also be kept relatively low.

[0038] Both the front sheet 1 and the back sheet 2 have perforated areas 12 where through holes 1c are provided, and non-perforated areas 11 where through holes 1c are not provided. In other words, the simple sleeping bag A is divided into areas that maintain heat retention and areas that exhibit moisture release. This prevents situations where heat is quickly dissipated, resulting in insufficient heat retention.

[0039] Here, it is preferable that the opening ratio of the through holes 1c in the perforated portion 12 is 0.1 to 16%. If the porosity is less than 0.1%, moisture release may be insufficient compared to when the porosity is within the above range, and if the porosity exceeds 16%, heat retention may be insufficient compared to when the porosity is within the above range.

[0040] The open area ratio is calculated from the diameter of each through-hole 1c, the distance (pitch) between adjacent through-holes 1c, and the arrangement of the through-holes 1c. For example, if the arrangement is a 60° staggered pattern with holes placed at each vertex of an equilateral triangle, the ratio of the area of ​​the through-holes 1c contained within that equilateral triangle to the area of ​​the equilateral triangle is the open-hole ratio. Furthermore, if the arrangement is a parallel type with holes placed at each vertex of a square, the ratio of the area of ​​the through-holes 1c contained in that square to the area of ​​the square is the open-hole ratio.

[0041] In both the front sheet 1 and the back sheet 2, the non-perforated portion 11 is located in the center, and the perforated portions 12 are provided on both sides of the non-perforated portion 11. This ensures that the central area where the user lies remains warm, while allowing excess moisture to be released from the areas on either side. Furthermore, the simple sleeping bag A can be actively rotated in the width direction to expose the perforated portion of the back sheet 2 to the front, thereby adjusting the moisture release properties. In this case, from the viewpoint of balancing moisture retention and moisture release, the ratio of the widths of the perforated portion 12 and the non-perforated portion 11 is preferably such that, when the width of the perforated portion 12 is set to 1, the widths of the non-perforated portions 11 on both sides are 0.25 to 1.

[0042] The sealing portion 3 is provided on the edges of the overlapping outer sheet 1 and inner sheet 2 so that the simple sleeping bag A forms a bag shape. Specifically, as described above, the sealing portion 3 is provided on the foot edge and on both sides of the edge. The method for forming the sealing portion 3 is not particularly limited, but heat sealing is preferably used because it allows for easy sealing of the opening.

[0043] Figure 2 is a vertical cross-sectional view illustrating the sealed portion formed by heat sealing of a simple sleeping bag according to the first embodiment. As shown in Figure 2, in the simple sleeping bag A, the front sheet 1 is arranged such that the alumina-deposited surface 1a faces outward and the exposed surface 1b of the olefin-based unoriented film faces inward, and the back sheet 2 is arranged such that the alumina-deposited surface 2a faces outward and the exposed surface 2b of the olefin-based unoriented film faces inward. Then, at the edges of the front sheet 1 and the back sheet 2, the exposed surface 1b of the unoriented olefin film of the front sheet 1 and the exposed surface 2b of the unoriented olefin film of the back sheet 2 are heat-sealed together to form a sealed portion 3.

[0044] Thus, in the simple sleeping bag A, the sealing part 3 is formed by heat sealing, making the manufacturing of the simple sleeping bag A extremely easy and enabling inexpensive mass production. Furthermore, even if the sealing portion 3 is unintentionally opened, since an unstretched olefin film is used, it can be heat-sealed again in the appropriate position. Incidentally, "heat sealing" is a technique for sealing films by welding them together using heat, electric current, ultrasound, high frequency, etc.

[0045] Returning to Figure 1, the opening 4 is provided at the head-side edge of the overlapping front sheet 1 and back sheet 2 so that the simple sleeping bag A forms a bag shape. In other words, the opening 4 is the part where the edges of the front sheet 1 and back sheet 2 simply overlap and are not sealed.

[0046] In the simple sleeping bag A, when the user enters through the opening 4 and puts their head out through the opening 4, buttons, hooks, zippers, hook-and-loop fasteners, etc. may be provided on the front sheet 1 and back sheet 2 on the opening 4 side in order to close the opening 4 other than the part where the head is to be put out.

[0047] (Second Embodiment) Figure 3 is a schematic front view showing a simple sleeping bag according to the second embodiment. The simple sleeping bag B according to the second embodiment is formed by heat-sealing the foot-side edges of the openings at the head and foot ends of a tubular sheet 20. As shown in Figure 3, the simple sleeping bag B has an outer sheet 1 located on the front side, an inner sheet 2 located on the back side, a sealed portion 3 with a sealed edge at the foot end, and an open portion 4 with an unsealed edge at the head end. In other words, the simple sleeping bag B according to the second embodiment is the same as the simple sleeping bag A according to the first embodiment, except that it does not have sealing parts 3 on both sides.

[0048] The simple sleeping bag B is rectangular in shape when viewed from above, with an opening 4 at the head end and a sealing section 3 at the foot end. Furthermore, both sides simply fold up. Therefore, since the simple sleeping bag B is bag-shaped, the user can use it as a sleeping bag by entering the simple sleeping bag B through the opening 4.

[0049] The simple sleeping bag B can be manufactured very easily by simply sealing the opening on one side of the tubular sheet 20 with heat seal. As a result, it becomes possible to manufacture it cheaply and in large quantities. Furthermore, since the simple sleeping bag B does not have a gusset, it is not bulky and can be easily folded. In other words, when not in use, the simple sleeping bag B can be made even more compact by repeatedly folding it.

[0050] (Third embodiment) Figure 4 is a schematic front view showing a simple sleeping bag according to the third embodiment. The simple sleeping bag C according to the third embodiment is made by folding a strip-shaped sheet 30 in the vertical direction and sealing the overlapping edges of the sheet 30 together by heat sealing. As shown in Figure 4, the simple sleeping bag C has an outer sheet 1 located on the front side, an inner sheet 22 located on the back side, a sealed portion 3 with both edges sealed, and an opening 4 on the head side edge of the outer sheet 1 that is not sealed. Furthermore, in the simple sleeping bag C, the outer sheet 1 and the inner sheet 22 have different sizes in the longitudinal direction, and when the two are overlapped, the inner sheet 22 extends towards the head. In other words, the inner sheet 22 is larger than the outer sheet 1 by the amount that it has a head support section 25 that extends towards the head. In other words, the simple sleeping bag C according to the third embodiment is the same as the simple sleeping bag A according to the first embodiment, except that the foot end does not have a sealing portion and is folded, and the back sheet 22 has a head position portion 25.

[0051] The simple sleeping bag C is rectangular in shape when viewed from above, with the head-side edge of the outer sheet 1 forming an opening 4, and both sides forming sealing portions 3. Furthermore, the foot end simply folds up. Therefore, the simple sleeping bag C is bag-shaped, and the user can use it as a sleeping bag by entering the simple sleeping bag C through the opening 4.

[0052] The simple sleeping bag C can be manufactured very easily by simply folding a strip-shaped sheet 30 lengthwise and sealing both sides with heat seals. As a result, it becomes possible to manufacture it cheaply and in large quantities. Furthermore, since the simple sleeping bag C does not have a gusset, it is not bulky and can be easily folded. In other words, the simple sleeping bag C can be made even more compact when not in use by repeatedly folding it. Furthermore, since the simple sleeping bag C has a head rest 25, the user can prevent their head from directly touching the ground by placing their head in the head rest 25. Furthermore, the simple sleeping bag C has the advantage of being easy to distinguish between the front and back.

[0053] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

[0054] The simple sleeping bags A to C according to the first to third embodiments are rectangular in shape when viewed from above, but are not limited to this. They may also be round, elliptical, polygonal, or the like.

[0055] In the simple sleeping bags A to C according to the first to third embodiments, the sheet 10 is made of an unoriented olefin film with an inorganic substance vapor-deposited on one side, but vapor deposition is not essential. Furthermore, the vapor deposition may be applied to only one of the front sheet 1 or the back sheet 2.

[0056] In the simple sleeping bags A to C according to the first to third embodiments, multiple through holes 1c of the same shape are provided at the same positions on the front sheet 1 and the back sheet 2, but the through holes may be provided at different positions on the front sheet 1 and the back sheet 2.

[0057] In the simple sleeping bags A to C according to the first to third embodiments, through holes 1c are provided in the outer sheet 1 and the inner sheet 2. However, a certain effect can be achieved if at least the through holes 1c are provided in the outer sheet 1, and the formation of through holes 1c in the inner sheet 2 is not essential. In other words, in this case, the back sheet 2 may be made of a simple unstretched olefin film that does not have through holes 1c.

[0058] In the simple sleeping bags A to C according to the first to third embodiments, multiple through holes 1c are provided at equal intervals in the front sheet 1 and the back sheet 2, but the through holes may be provided randomly.

[0059] In the simple sleeping bags A to C according to the first to third embodiments, the non-perforated portion 11 is located in the center of the front sheet 1 (and the back sheet), and the perforated portions 12 are provided on both sides of the non-perforated portion 11, but the invention is not limited to this. Figures 5 and 6 are schematic front views showing a simple sleeping bag according to another embodiment. As shown in Figure 5, for example, in the simple sleeping bag D, the non-perforated section 31 is located on the side of the opening 4 of the front sheet 13 (and back sheet), and the perforated section 32 is provided on the opposite side of the opening 4 of the non-perforated section 31. In this case, the simple sleeping bag D will primarily keep the user's upper body warm, while allowing moisture to escape from the lower body.

[0060] Furthermore, as shown in Figure 6, for example, in the simple sleeping bag E, the non-perforated section 41 is located in the center of the opening 4 side of the front sheet 14 (and back sheet), and the perforated section 42 is provided on the opposite side of the opening 4 of the non-perforated section 41 and on both sides of the non-perforated section 41. In this case, the simple sleeping bag E will primarily keep the user's upper body warm, while allowing moisture to escape from both sides of the upper body and the lower body.

[0061] In the simple sleeping bags A to C according to the first to third embodiments, the sealing of the sealing portion 3 is performed by heat sealing, but the invention is not limited to this, and other sealing members such as adhesive tape may be used for sealing. Furthermore, after heat sealing, the seal may be reinforced with adhesive tape or staples to further improve its strength. [Industrial applicability]

[0062] The simple sleeping bag of this invention can be used as a sleeping bag during disasters or outdoor activities. Furthermore, because it can be folded, it is possible to send large quantities to disaster areas, campsites, etc., in a single transport. Furthermore, it can be easily included as one of the disaster preparedness items in each household. Furthermore, it can reduce the burden of carrying it as luggage for outdoor activities. The simple sleeping bag of this invention has the advantages of being sufficiently lightweight and tear-resistant. [Explanation of Symbols]

[0063] 1, 13, 14... Front side sheet 10, 20, 30... seats 11, 31, 41... Non-perforated section 12,32,42...Perforated part 1c...Through hole 2.22...Back side sheet 25...Head placement part 3. Sealing section 4.. Opening A, B, C, D, E... Simple sleeping bags

Claims

1. In a simple sleeping bag made by sealing a portion of a sheet to form a bag with an opening, The aforementioned sheet is made of an unstretched olefin film, The thickness of the aforementioned sheet is 10 to 100 μm. The aforementioned sheet is provided with through holes, A simple sleeping bag in which the aforementioned through-holes are formed by perforation processing using a hot needle method.

2. Of the aforementioned sheets, the front sheet located on the front side is provided with through holes with a diameter of 0.5 to 3.5 mm. The front sheet has a perforated portion in the area where the through holes are provided and a non-perforated portion in the area where the through holes are not provided. The simple sleeping bag according to claim 1, wherein the opening ratio of the through holes in the perforated portion is 0.1 to 16%.

3. The simple sleeping bag according to claim 2, wherein the front sheet has the non-perforated portion located in the center and the perforated portions provided on both sides of the non-perforated portion.

4. Of the aforementioned sheets, the front sheet located on the front side and the back sheet located on the back side are both provided with through holes with a diameter of 0.5 to 3.5 mm. The front sheet and the back sheet each have a perforated portion in the area where the through holes are provided and a non-perforated portion in the area where the through holes are not provided. The simple sleeping bag according to claim 1, wherein the opening ratio of the through holes in the perforated portion is 0.1 to 16%.

5. The simple sleeping bag according to claim 4, wherein the front sheet and the back sheet both have the non-perforated portion located in the center and the perforated portions provided on both sides of the non-perforated portion.

6. Of the aforementioned sheets, the front sheet located on the front side is an unstretched olefin film in which an inorganic substance is vapor-deposited on at least the outer surface. The simple sleeping bag according to claim 1, wherein the back sheet located on the reverse side of the aforementioned sheet is an unstretched olefin film on which an inorganic substance has been vapor-deposited on at least the outer surface.

7. The aforementioned sheet is in the shape of a strip, The simple sleeping bag according to claim 1, wherein the sheet is folded in the vertical direction and both overlapping sides of the sheet are sealed by heat sealing.

8. The aforementioned sheet is tubular in shape, The simple sleeping bag according to claim 1, wherein one of the openings is sealed by heat sealing.

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