JP2024050260A - Simple sleeping bag - Google Patents

Abstract

[Problem] To provide a simple sleeping bag that is sufficiently lightweight and tear-resistant. [Solution] The present invention relates to a simple sleeping bag A in which a portion of a sheet 10 is sealed to form a bag shape with an opening 4, the sheet 10 is made of a non-stretched olefin film and has a thickness of 10 to 100 μm, the top sheet 1 of the sheet 10 located on the top side has through holes 1c with a diameter of 0.5 to 3.5 mm, the top 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 aperture ratio of the through holes 1c in the perforated portion 12 is 0.1 to 16%. [Selected Figure] Figure 1

Description

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

Disaster prevention goods are known that are prepared in preparation for disasters such as earthquakes and typhoons.
Disaster preparedness goods generally include daily necessities, but bedding is often left out due to its bulkiness.

During a disaster, a situation may arise where people have no choice but to sleep in an evacuation shelter, etc. For example, in areas with extremely cold temperatures, the lack of bedding can cause serious physical problems for the victims.
On the other hand, in outdoor activities (hereinafter simply referred to as "outdoors"), bedding is bulky and therefore a burden to carry. Therefore, there is a demand for lightweight, simple sleeping bags.

In response to this, lightweight sleeping bags have been developed.
For example, there is known an emergency sleeping bag which consists of a bag formed from a laminate of an aluminum-vapor-deposited polyester layer, a polyethylene layer and a water-absorbent nonwoven fabric layer laminated in this order from the outer surface, and which has gusset sections on both sides of the bag with folds formed inside the bag, and which has fastening members near the opening of the bag in the gusset sections that join the upper and lower sides of the bag via the folds so that the bag can be opened and closed freely (see, for example, Patent Document 1).

Utility Model Registration No. 3179654

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

The present invention was made in consideration of the above circumstances, and aims to provide a simple sleeping bag that is sufficiently lightweight and tear-resistant.

The inventors conducted extensive research to find a solution to the above-mentioned problems, and discovered that the above-mentioned problems could be solved by making the bag-shaped sheet out of a non-stretched olefin film and setting the thickness of the film within a specified range, which led to the completion of the present invention.

The present invention is a simple sleeping bag in which a portion of a sheet is sealed to form a bag shape with an opening, the sheet being made of a non-stretched olefin film and having a thickness of 10 to 100 μm.

In the simple sleeping bag of the present invention, the top sheet located on the top side of the sheets is provided with through holes having a diameter of 0.5 to 3.5 mm, the top sheet has a perforated portion in the area where the through holes are provided and a non-perforated portion in the area where no through holes are provided, and it is preferable that the opening rate of the through holes in the perforated portion is 0.1 to 16%.
In this case, it is more preferable that the front sheet has a non-perforated portion located in the center and perforated portions provided on both sides of the non-perforated portion.

In addition, in the simple sleeping bag of the present invention, the top sheet located on the top side and the back sheet located on the back side both have through holes with a diameter of 0.5 to 3.5 mm, and each of the top sheet and the back 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, and it is preferable that the opening rate of the through holes in the perforated portion is 0.1 to 16%.
In this case, it is more preferable that the non-perforated portion of each of the front and back sheets is located in the center, and perforated portions are provided on both sides of the non-perforated portion.

In the simple sleeping bag of the present invention, it is preferable that the through holes are formed by hot needle perforation processing.

In the simple sleeping bag of the present invention, it is preferable that the sheet located on the front side of the sheet is a non-stretched olefin-based film with at least an outer surface coated with an inorganic substance, and the sheet located on the back side of the sheet is a non-stretched olefin-based film with at least an outer surface coated with an inorganic substance.

In the simple sleeping bag of the present invention, when the sheet is in the form of a strip, it is preferable that the sheet is folded in the longitudinal direction and both sides of the overlapping sheets are sealed by heat sealing.
When the sheet is in a tubular form, it is preferable that the opening on one side is sealed by heat sealing.

The simple sleeping bag of the present invention is bag-shaped and can be used as a sleeping bag during disasters or outdoors.
In addition, the bag-shaped sheet is made of a non-stretched olefin film and has a thickness within a specified range, which has the advantage of being lightweight yet tear-resistant. In other words, since a non-stretched material is used, it is difficult to tear even when pulled.
In addition, since it is made of a relatively soft olefin-based material, it can be folded for storage and has the advantage of not taking up much space.

For these reasons, the simple sleeping bag of the present invention can be stored in large quantities in a given space.
This makes it possible to send large quantities to disaster areas, campsites, etc. in one trip.
Moreover, it can easily be included in each household as one of the disaster prevention goods.
It also reduces the burden of carrying the baggage outdoors.

In the simple sleeping bag of the present invention, by providing through holes with a diameter within the above range, moisture release properties are improved, thereby preventing heat from building up inside the simple sleeping bag.
When not in use, air escapes through the through holes, allowing the bag to be folded up more compactly.
In addition, since a relatively soft olefin-based sheet is used and perforations are provided, the generation of noise caused by the film rubbing (rustling noise) can be reduced.

Here, in a simple sleeping bag, by making at least the top sheet comprised of a perforated section and a non-perforated section, it is possible to separate the area that maintains heat retention from the area that exhibits moisture release, which makes it possible to exhibit sufficient moisture release while ensuring moisture retention.
Similarly, by making the back sheet comprised of perforated and non-perforated sections, it is possible to ensure moisture-wicking properties even if the user turns over and the sleeping bag becomes twisted or turned inside out.
Furthermore, by setting the aperture ratio of the through holes per unit area of the perforated portion within the above range, it becomes possible to release an appropriate amount of moisture without impairing heat retention.

In the outer sheet of the simple sleeping bag of the present invention, a non-perforated section is placed in the center and perforated sections are provided on both sides, thereby ensuring heat retention in the central area where the user lies down and allowing only excess moisture to be released from the areas on both sides.
In addition, by arranging the back sheet in the same way, it is possible to adjust the moisture release. In other words, it is also possible to actively rotate the simple sleeping bag in the width direction to expose the perforated part of the back sheet to the front side.

In the simple sleeping bag of the present invention, the outer sheet is made of a thermoplastic olefin-based material and is manufactured without stretching, so the through holes can be formed by hot needle perforation. In this case, when the through holes are formed, the burrs that occur around the edges of the through holes are also melted, so it is possible to prevent burrs from remaining. As a result, the bag also has an excellent feel against the skin.

The simple sleeping bag of the present invention has improved heat retention properties when the front and back sheets are made of a non-oriented olefin film having an inorganic substance vapor-deposited on the outer surface.
In other words, the temperature inside the sleeping bag can be quickly increased.
On the other hand, as described above, since the through holes are provided, the moisture releasing property is also excellent.
Therefore, with the simple sleeping bag, the internal temperature can be raised quickly, and if the humidity inside the sleeping bag increases over time, the moisture can be released through the through holes, making it possible to maintain a comfortable sleep.

In the simple sleeping bag of the present invention, if the sheet is strip-shaped, the sheet can be folded lengthwise and both sides of the overlapping sheet can be sealed by heat sealing; if the sheet is tube-shaped, the opening on one side can be sealed by heat sealing.
In these cases, a simple sleeping bag can be easily manufactured, which allows for inexpensive mass production.
In addition, because a non-oriented olefin-based film is used, even if the sealed portion is unintentionally opened, it can be heat-sealed again in the appropriate position.
Even if an inorganic substance is vapor-deposited on the outer surfaces of the front sheet and the back sheet, the unstretched olefin film is exposed on the inner surfaces of each sheet, so that the sheets can be sealed by heat sealing.

FIG. 1 is a front view showing a schematic diagram of a simple sleeping bag according to a first embodiment. FIG. 2 is a vertical cross-sectional view illustrating a sealed portion formed by heat sealing of the simple sleeping bag according to the first embodiment. FIG. 3 is a front view showing a schematic diagram of a simple sleeping bag according to a second embodiment. FIG. 4 is a front view showing a schematic diagram of a simple sleeping bag according to a third embodiment. FIG. 5 is a front view showing a schematic view of a simple sleeping bag according to another embodiment. FIG. 6 is a front view showing a schematic diagram of a simple sleeping bag according to another embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary.
In the drawings, the same elements are given the same reference numerals and duplicated explanations are omitted.
In addition, unless otherwise specified, positional relationships such as up, down, left, right, etc. are based on the positional relationships shown in the drawings.
Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

The simple sleeping bag according to the present invention is a so-called simple type sleeping bag, and is used, for example, in evacuation shelters during disasters such as earthquakes and typhoons, or at outdoor campsites.
Furthermore, when not in use, simple sleeping bags are lightweight and can be folded up compactly, making it possible to store large quantities and transport large numbers of them simultaneously.
Moreover, they can be stored in each home as disaster prevention goods.
It also reduces the burden of carrying the baggage outdoors.

In this specification, the "head side" refers to the opening side of the sleeping bag A, the side where the user's head will be located when the user enters the sleeping bag A, and the "foot side" refers to the bottom side of the sleeping bag A, the side where the user's feet will be located when the user enters the sleeping bag A.
Additionally, "inside" refers to the inside of the simple sleeping bag A, and "outside" refers to the outside of the simple sleeping bag A.

First Embodiment
FIG. 1 is a front view showing a schematic diagram of a simple sleeping bag according to a first embodiment.
As shown in Figure 1, the simple sleeping bag A of 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) except for an opening 4 on the head side.
That is, the simple sleeping bag A has a top sheet 1 located on the top side, a bottom sheet 2 located on the bottom side, a sealed portion 3 having three sealed edges, and an opening 4 having one edge (on the head side) that is not sealed.
The front sheet 1 and the back sheet 2 are of the same size, and when they are superimposed, the positions of their edges are aligned with each other.

Specifically, the simple sleeping bag A is rectangular when viewed from above, with the head side edge forming an opening 4 and the foot side edge and both side edges forming sealing portions 3 .
Therefore, the simple sleeping bag A is bag-shaped, and a user can enter the simple sleeping bag A through the opening 4 and use it as a sleeping bag.
Furthermore, since the simple sleeping bag A does not have a so-called gusset portion, it is not bulky and can be easily folded.
That is, when not in use, the simple sleeping bag A can be folded repeatedly to make it more compact.

In the simple sleeping bag A, a non-oriented olefin film is used as the sheet 10 (the front sheet 1 and the back sheet 2).
Examples of the non-stretched olefin-based film include olefin-based films such as polyethylene films and polypropylene films that are produced without stretching.
In this way, in the simple sleeping bag A, an olefin-based film is used as the sheet 10, which is lightweight, recyclable, and relatively soft, thereby reducing the sound of the film rubbing against one another (rustling noise) during use.
In addition, since it has excellent resistance to acids and bases, it can also be prevented from being eluted by acids or bases.
In the simple sleeping bag A, a non-stretchable film is deliberately used as the sheet 10, so that it is easy to stretch and difficult to tear even when pulled.
In addition, it has excellent abrasion resistance and enables heat sealing, which will be described later.

In the sheet 10, an inorganic substance is vapor-deposited on one side of the non-stretched olefin-based film. Specifically, the front sheet 1 is a non-stretched olefin-based film with an inorganic substance vapor-deposited on at least the outer side (the side opposite the back sheet 2), and the back sheet 2 is a non-stretched olefin-based film with an inorganic substance vapor-deposited on at least the outer side (the side opposite the front sheet 1).

Here, the deposition of the inorganic substance is carried out on one side of the unstretched olefin film by a known method such as the so-called vacuum deposition method, sputtering method, or ion plating method.
The inorganic substances that can be used include aluminum, alumina, silica, and the like.
That is, the unstretched olefin-based film is subjected to so-called aluminum deposition, alumina deposition, silica deposition, etc. Among these, from the viewpoint of versatility, alumina deposition using alumina as an inorganic substance is preferred.
This gives the simple sleeping bag A excellent heat retention.

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

In the simple sleeping bag A, a plurality of through holes 1c are provided at equal intervals in each of the top sheet 1 and the back sheet 2.
The back sheet 2 has the same structure as the front sheet 1. That is, the back sheet 2 has through holes 1c of the same shape and at the same positions as the front sheet 1.
Therefore, a detailed description of the through holes in the back sheet 2 will be omitted.
This gives the simple sleeping bag A excellent moisture release properties.
Furthermore, by providing the through holes 1c, the generation of noise caused by the film rubbing against each other during use can be further reduced.
Furthermore, by providing the through hole 1c, when folding, the air inside can escape through the through hole 1c, making it easier to fold and enabling it to be folded more compactly.
Furthermore, by providing through holes in the back sheet 2, moisture release can be ensured even if the user turns over in his sleep and the sleeping bag gets twisted or turned inside out.

For these reasons, in the simple sleeping bag A, the above-mentioned non-oriented olefin film with inorganic material vapor deposition is used as the front sheet 1 and the back sheet 2, and by providing through holes 1c in the front sheet 1 and the back sheet 2, it is possible to maintain heat retention while allowing moisture to escape through the through holes if the humidity inside the sleeping bag increases over time.
As a result, the simple sleeping bag A allows the user to maintain a comfortable sleep.

The shape of the through hole 1c is not particularly limited and may be a slit, a circle, a polygon, an oval, or the like. From the viewpoint of workability, however, a circle is preferable.
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, there is a risk that the moisture release properties will 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, there is a risk that the heat retention properties will be impaired compared to when the diameter is within the above range.
The "diameter" means the maximum diameter in the cross section of the through hole 1c.
Incidentally, when the through hole 1c is round, the diameter means the diameter.

The through holes 1c are provided in a plurality, and the arrangement thereof is not particularly limited. For example, the through holes 1c may be provided randomly, or may be provided in a regular arrangement such as a 60° staggered arrangement at each apex of an equilateral triangle, a 45° staggered arrangement at each apex of a square, or a parallel arrangement (90° in series).
From the viewpoint of efficiently achieving moisture release, it is preferable that the through holes 1c are regularly arranged.
In this case, when the through holes 1c are provided, it is easy to control the hole ratio to a predetermined value.

The processing method for forming the through-hole 1c is not particularly limited, but examples thereof include punching, perforation, laser micromachining, and the like.
Among these, it is preferable that the through hole 1c is formed by hot needle type perforation processing, in which case processing can be performed at low cost and burrs can be suppressed from being generated around the periphery of the through hole 1c.
As a result, it also feels excellent against the skin.
In addition, since the olefin-based film has a relatively low melting point, the temperature of the hot needle can also be set to a relatively low temperature.

Both the front sheet 1 and the back sheet 2 have a perforated portion 12 where the through holes 1c are provided and a non-perforated portion 11 where the through holes 1c are not provided. In other words, the simple sleeping bag A is divided into an area that maintains heat retention and an area that exhibits moisture release properties.
This allows heat to be dissipated immediately, preventing the occurrence of a situation in which heat cannot be sufficiently maintained.

Here, the aperture ratio of the through holes 1c in the perforated portion 12 is preferably 0.1 to 16%.
If the porosity is less than 0.1%, there is a risk that the moisture release properties will be insufficient compared to when the porosity is within the above range, and if the porosity is more than 16%, there is a risk that the heat retention properties will be insufficient compared to when the porosity is within the above range.

The aperture ratio is calculated from the diameter of the through holes 1c, the distance (pitch) between adjacent through holes 1c, the arrangement of the through holes 1c, and the like.
For example, when the through holes 1c are arranged at the vertices of an equilateral triangle in a 60° staggered pattern, the ratio of the area of the through holes 1c included in the equilateral triangle to the area of the equilateral triangle is the aperture ratio.
When the arrangement is a parallel type in which the through holes 1c are arranged at each vertex of a square, the ratio of the area of the through holes 1c contained in the square to the area of the square is the aperture ratio.

In both the front sheet 1 and the back sheet 2, a non-perforated portion 11 is located in the center, and perforated portions 12 are provided on both sides of the non-perforated portion 11.
This ensures heat retention in the central area where the user lies down, while allowing only excess moisture to escape from the areas on both sides.
It is also possible to actively rotate the simple sleeping bag A in the width direction to expose the perforated portion of the back sheet 2 to the front side, thereby adjusting the moisture release properties.
In this case, from the viewpoint of a balance between moisture retention and moisture release properties, it is preferable that the ratio of the widths of the perforated portion 12 and the non-perforated portion 11 is such that, when the width of the perforated portion 12 is 1, the width of the non-perforated portions 11 on both sides is 0.25 to 1.

The sealing portion 3 is provided at the edge of the overlapping front sheet 1 and back sheet 2 so that the simple sleeping bag A has a bag-like shape. Specifically, as described above, the sealing portion 3 is provided at the edge on the foot side and the edges on both sides.
The method for forming the sealing portion 3 is not particularly limited, but from the viewpoint of easily sealing the opening, welding and sealing by heat sealing is preferably used.

FIG. 2 is a vertical cross-sectional view illustrating a sealed portion formed by heat sealing of the simple sleeping bag according to the first embodiment.
As shown in Figure 2, in the simple sleeping bag A, a front sheet 1 having a through hole 1c is arranged so that the alumina vapor-deposited surface 1a is on the outside and the exposed surface 1b of the olefin-based unstretched film is on the inside, and a back sheet 2 is arranged so that the alumina vapor-deposited surface 2a is on the outside and the exposed surface 2b of the olefin-based unstretched film is on the inside.
At the edges of the front sheet 1 and the back sheet 2, the exposed surface 1b of the olefin-based unstretched film of the front sheet 1 and the exposed surface 2b of the olefin-based unstretched film of the back sheet portion 2 are welded together by heat sealing to form a sealed portion 3.

In this way, in the simple sleeping bag A, since the sealing portion 3 is formed by welding and sealing using heat sealing, the manufacturing of the simple sleeping bag A becomes extremely easy, and mass production at low cost becomes possible.
Furthermore, even if the sealing portion 3 is unintentionally opened, since a non-oriented olefin-based film is used, heat sealing can be performed again at the appropriate position.
By the way, "heat sealing" is a technology that seals films by welding them together using heat, electric current, ultrasound, high frequency, etc.

Returning to FIG. 1, the opening 4 is provided at the head side edge of the overlapping top sheet 1 and back sheet 2 so that the simple sleeping bag A is bag-shaped. In other words, the opening 4 is the part where the edges of the top sheet 1 and back sheet 2 are simply overlapped and not sealed.

In the case of simple sleeping bag A, when the user enters through opening 4 and sticks his/her head out through opening 4, buttons, hooks, fasteners, hook-and-loop fasteners, etc. may be provided on the front sheet 1 and back sheet 2 on the opening 4 side to close the opening 4 except for the part where the neck will be sticking out.

Second Embodiment
FIG. 3 is a front view showing a schematic diagram of a simple sleeping bag according to a second embodiment.
The simple sleeping bag B according to the second embodiment has openings on the head and foot sides of a tube-shaped sheet 20, the foot-side edges of which are sealed together by heat sealing.
As shown in Figure 3, simple sleeping bag B has a top sheet 1 located on the top side, a bottom sheet 2 located on the bottom side, a sealed portion 3 whose edge on the foot side is sealed, and an opening 4 whose edge on the head side is not sealed.
That is, 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 the sealing portions 3 on both sides.

The simple sleeping bag B is rectangular when viewed from above, with an opening 4 at the edge on the head side and a sealing portion 3 at the edge on the foot side.
Also, both sides are simply folded over.
Therefore, the simple sleeping bag B is bag-shaped, and a user can enter the simple sleeping bag B through the opening 4 and use it as a sleeping bag.

The simple sleeping bag B can be manufactured extremely simply by sealing the opening on one side of the tube-shaped sheet 20 by heat sealing.
As a result, mass production at low cost is possible.
Furthermore, since the simple sleeping bag B does not have a so-called gusset portion, it is not bulky and can be easily folded.
That is, when not in use, the simple sleeping bag B can be folded repeatedly to make it more compact in size.

Third Embodiment
FIG. 4 is a front view showing a schematic diagram of a simple sleeping bag according to a third embodiment.
The simple sleeping bag C according to the third embodiment is made by folding a strip-shaped sheet 30 vertically and sealing the overlapping edges of the sheet 30 together by heat sealing.
As shown in Figure 4, the simple sleeping bag C has a top sheet 1 located on the top side, a back sheet 22 located on the back side, a sealed portion 3 with sealed edges on both sides, and an opening 4 where the edge on the head side of the top sheet 1 is not sealed.
In addition, the simple sleeping bag C has different longitudinal sizes for the top sheet 1 and the back sheet 22, so that when the two are stacked together, the back sheet 22 extends toward the head. In other words, the back sheet 22 is larger than the top sheet 1 by the amount that the head placement portion 25 extends toward the head.
In other words, the simple sleeping bag B of the second embodiment is in a folded state with no sealing portion on the foot side, and is the same as the simple sleeping bag A of the first embodiment except that the back sheet 22 has a head placement portion 25.

The simple sleeping bag C is rectangular when viewed from above, with an opening 4 at the head side edge of the outer sheet 1 and sealed portions 3 on both sides.
The foot side is simply folded.
Therefore, the simple sleeping bag C is bag-shaped, and a user can enter the simple sleeping bag C through the opening 4 and use it as a sleeping bag.

The simple sleeping bag C can be manufactured extremely simply by folding the strip-shaped sheet 30 vertically and sealing both sides by heat sealing.
As a result, mass production at low cost is possible.
Furthermore, since the simple sleeping bag C does not have a so-called gusset portion, it is not bulky and can be easily folded.
That is, when not in use, the simple sleeping bag C can be folded repeatedly to make it more compact in size.
Furthermore, since the simple sleeping bag C has a head placement section 25, the user can place his/her head in the head placement section 25 to prevent the head from directly touching the ground.
Another advantage of the simple sleeping bag C is that it is easy to distinguish between the front and back.

Although the above describes a preferred embodiment of the present invention, the present invention is not limited to the above embodiment.

The simple sleeping bags A to C according to the first to third embodiments are rectangular in top view, but are not limited to this. They may also be round, elliptical, polygonal, etc.

In the simple sleeping bags A to C according to the first to third embodiments, the sheet 10 is made of a non-oriented olefin film with an inorganic substance vapor-deposited on one side thereof, but vapor deposition is not essential.
Alternatively, only one of the front sheet 1 and the back sheet 2 may be subjected to vapor deposition.

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 top sheet 1 and the back sheet 2, but the through holes may be provided at different positions on the top sheet 1 and the back sheet 2.

In the simple sleeping bags A to C of the first to third embodiments, a through hole 1c is provided in the top sheet 1 and the back sheet 2, but a certain level of effect can be achieved as long as a through hole 1c is provided in at least the top sheet 1, and the formation of a through hole 1c in the back sheet 2 is not essential.
That is, in this case, the back sheet 2 may be made of a simple unstretched olefin film having no through holes 1c.

In the simple sleeping bags A to C according to the first to third embodiments, the top sheet 1 and the back sheet 2 have multiple through holes 1c spaced at equal intervals, but the through holes may be arranged randomly.

In the simple sleeping bags A to C of the first to third embodiments, the non-perforated portion 11 is located in the center of the top sheet 1 (and the back sheet), and the perforated portions 12 are provided on both sides of the non-perforated portion 11, but this is not limited to the above.
5 and 6 are front views showing schematic views of a simple sleeping bag according to another embodiment.
As shown in Figure 5, for example, in simple sleeping bag D, a non-perforated portion 31 is located on the opening 4 side of the top sheet 13 (and the back sheet), and a perforated portion 32 is provided on the opposite side of the non-perforated portion 31 from the opening 4.
In this case, the simple sleeping bag D mainly keeps the upper body of the user warm and releases moisture from the lower body.

Also, as shown in Figure 6, for example, in simple sleeping bag E, a non-perforated portion 41 is located in the center of the opening 4 side of the top sheet 14 (and the back sheet), and perforated portions 42 are provided on the opposite side of the opening 4 of the non-perforated portion 41 and on both sides of the non-perforated portion 41.
In this case, the simple sleeping bag 40 mainly keeps the upper body of the user warm, and releases moisture from both sides of the upper body and the lower body.

In the simple sleeping bags A to C according to the first to third embodiments, the sealing at the sealing portion 3 is performed by heat sealing, but this is not limited to this and the sealing may be performed using another sealing material such as adhesive tape.
After heat sealing, the sheet may be reinforced with adhesive tape, a stapler, or the like to further improve its strength.

The simple sleeping bag of the present invention can be used as a sleeping bag during disasters or outdoors.
In addition, because the masks can be folded, they can be sent in large quantities in one trip to disaster areas, campsites, etc.
Moreover, it can easily be included in each household as one of the disaster prevention goods.
It also reduces the burden of carrying the baggage outdoors.
The simple sleeping bag of the present invention has the advantages of being sufficiently lightweight and tear-resistant.

Reference Signs List 1, 13, 14: Outer sheet 10, 20, 30: Sheet 11, 31, 41: Non-perforated section 12, 32, 42: Perforated section 1c: Through hole 2, 22: Underside sheet 25: Head placement section 3: Sealing section 4: Opening A, B, C, D, E: Simple sleeping bag

Claims (9)

In a simple sleeping bag in which a part of the sheet is sealed to form a bag-like shape with an opening,
The sheet is made of a non-oriented olefin-based film,
The simple sleeping bag has a thickness of 10 to 100 μm. Among the sheets, the front sheet located on the front side is provided with a through hole having a diameter of 0.5 to 3.5 mm,
the front sheet has a perforated portion in an area where the through holes are provided and a non-perforated portion in an area where the through holes are not provided,
2. The simple sleeping bag according to claim 1, wherein the aperture ratio of the through holes in the perforated portion is 0.1 to 16%. The simple sleeping bag according to claim 2, wherein the non-perforated portion of the front sheet is located in the center, and the perforated portion is provided on both sides of the non-perforated portion. Among the sheets, a front sheet located on the front side and a back sheet located on the back side are both provided with through holes having a diameter of 0.5 to 3.5 mm,
the front sheet and the back sheet each have a perforated portion in an area where the through holes are provided and a non-perforated portion in an area where the through holes are not provided,
2. The simple sleeping bag according to claim 1, wherein the aperture ratio of the through holes in the perforated portion is 0.1 to 16%. The simple sleeping bag according to claim 4, wherein the non-perforated portion of the top sheet and the back sheet is located in the center, and the perforated portion is provided on both sides of the non-perforated portion. The simple sleeping bag of claim 1, wherein the through holes are formed by hot needle perforation. Among the sheets, the front sheet located on the front side is a non-stretched olefin-based film having an inorganic substance vapor-deposited on at least the outer surface thereof,
2. The simple sleeping bag according to claim 1, wherein the back sheet of said sheets is a non-oriented olefin film having an inorganic substance vapor-deposited on at least the outer surface thereof. The sheet is in a strip shape,
2. A simple sleeping bag as claimed in claim 1, wherein said sheet is folded in the longitudinal direction and both sides of said overlapping sheets are sealed by heat sealing. the sheet is tubular;
2. The simple sleeping bag according to claim 1, wherein one opening is sealed by heat sealing.

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