JPH033236Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a foldable split futon using soft polyurethane foam.

[Conventional technology]

Since soft urethane foam has appropriate elasticity and breathability, it has been widely used as pine tresses and the like. Conventional urethane foam pine tresses are made by wrapping a single continuous urethane foam sheet with an outer material, but in this case, in order to obtain sufficient cushioning properties, the thickness is increased to make it foldable. It disappears. Therefore, foldable urethane foam pinerests as shown in FIGS. 3A and 3B have been widely used.

In the figure, numerals 1 ₁ , 1 ₂ , and 1 ₃ are urethane foam sheets having a thickness that provides desired cushioning properties. The urethane foam sheets 1 ₁ to 1 ₃ divided into a plurality of parts are each wrapped in an outer fabric 2 and connected to each other by the side fabric 2 to form a continuous foldable pine tress. Then, the urethane foam sheets 1 ₂ and 1 ₃ connected to both sides of the central urethane foam sheet 1 ₁ are rotated using the side fabric 2 as hinges as shown by the arrows in the figure, and are in the state shown in FIG. It is designed to be folded.

According to the above structure, a foldable pinerest can be obtained even when a urethane foam sheet with a considerable thickness is used.

[Problem that the invention attempts to solve]

In the pinerest shown in Fig. 3, the joints between the urethane foam sheets 1 ₁ to _{1 3} (especially between 1 ₁ and 1 ₂ ) may separate to some extent during use, or there may be a step. There was a problem in that a comfortable feeling of use could not be obtained by lying directly on the body. Therefore, when used as bedding, a regular mattress is spread over it, and in reality, its use is limited to mere pine tresses or cushioning materials.

In view of the above circumstances, the present invention aims to provide a futon made of urethane foam that can be suitably used as a normal futon on which the body is directly laid, and is foldable.

[Means for solving problems]

The futon according to the present invention includes a plurality of cushion blocks each made of a soft urethane foam sheet of any thickness having an air permeability of 80 c.c./cm ² /sec or more wrapped in cloth.
These cushion blocks are lined up in series with a predetermined spacing so that the whole is the size of a futon, and the spaces between these cushion blocks are filled with cotton or ultra-soft urethane foam cut into stripes and having a hardness of 5 kg/JIS or less. The futon is characterized in that the entire futon is wrapped with an outer material, the periphery is sewn, and overlocking portions are provided at appropriate locations.

The reason why this invention uses a urethane foam sheet with a breathability of 80 c.c./cm ² /sec or more is that the futon of this invention is different from conventional pine mattresses and can be used by lying directly on it. This is because the purpose is That is, the air permeability of the soft urethane foam used in conventional pine tresses is at most 30 to 60 c.c./cm ² /sec, and this level of air permeability cannot prevent stuffiness during use. From this meaning,
Preferably, the air permeability is 120 c.c./cm ² /sec or more.

In the present invention, the cotton or ultra-soft urethane foam cut into stripes and having a hardness of 5 kg/JIS or less, which is filled between the soft urethane foam cushion blocks, may be filled as is, or it may be filled with cloth. You can also wrap it and fill it.

[Effect]

As mentioned above, in the futon according to the present invention, the gaps between the cushion blocks made of soft urethane foam sheets are filled with cotton or ultra-soft urethane foam stripes, so there is no difference in level in this area. . Therefore, even when you lie directly on it, you can get the same comfortable feeling of rest as you would with a normal cotton futon.

On the other hand, since the band-shaped region filled with cotton or ultra-soft urethane foam stripes does not have rebound properties, it can be easily folded at this portion and has excellent storage properties.

In addition, the soft urethane foam provides appropriate elasticity and good breathability and heat retention, making it comfortable to use and extremely lightweight compared to cotton futons.

Furthermore, the present invention not only sews around the outer surface of the futon, but also bends and tightens the cushion blocks at appropriate points, which compensates for the lack of hardness that is a drawback of soft urethane foam with good breathability. I can do it.

〔Example〕

FIG. 1A is a perspective view showing the entire futon according to an embodiment of the present invention, and FIGS. 1B and 1C are sectional views showing the main parts thereof.

As shown in FIG. 1A, this comforter consists of three cushion body regions 10, 20, 30 and two border regions 40, 50. FIG. 1B is a sectional view of a portion extending from the cushion body region 10 to the cushion body region 20. As shown in the figure, the cushion body region 10 has a soft urethane foam sheet 11 wrapped in cloth 12, and the cushion body region 20 has a soft urethane foam sheet 11 wrapped in cloth 12, and cloth 2
A soft urethane foam sheet 21 wrapped in 2 is installed. Soft urethane foam sheet 1
1,21 is air permeability 120c.c./cm ² /sec, density
10Kg/m ³ is used. The boundary area 40 between the cushion body areas 10 and 20 has cotton 4
1 is filled, and the futon outer material 60 covers the entire surface. Note that the portion from the cushion body region 20 to the cushion body region 30 also has the same cross-sectional structure as above.

FIG. 1C is a cross-sectional view showing the end of the cushion body region 30. FIG. As shown in the figure, the ends of the urethane foam sheet 31 are sewn together with the surrounding cloth 32 and the futon outer material 60. In addition to the sewn portion 61, an overlock portion 62 is provided from the surface of the futon outer material 60 at an appropriate location in the cushion body region. Then, the sewing part 61 and the overlocking part 62
The squeezing process gives appropriate hardness and elasticity to the soft urethane foam sheet in the cushion body area.

In the futon of the above embodiment, the soft urethane foam sheets 11, 21, and 31 with good air permeability are used, and moderate hardness is imparted to the soft urethane foam sheets by squeezing the sewn portions 61 and the overlocked portions 62. Because of this, it has advantages such as excellent elasticity, heat retention, and breathability, as well as being lightweight.

Furthermore, since the boundary regions 40 and 50 are filled with cotton 41 and have no repulsion, these regions can be easily folded and stored easily.

Moreover, unlike the conventional pinerest shown in FIG. 3A, there is no separation or step formation at the boundary area, so even if you lie down directly on it, you can feel comfortable using it.

Note that, as shown in FIG. 2, the cotton 41 filled in the boundary area may be wrapped in a cloth 42 before being filled.

Further, instead of the cotton 41, an ultra-soft urethane foam sheet having a hardness of 5 kg/JIS or less may be cut into a string shape and filled inside the boundary area. This ultra-soft urethane foam has almost no rebound elasticity like cotton, so it does not become an obstacle when folding. The purpose of cutting into a string shape is to prevent so-called "twisting".

[Effect of idea]

As detailed above, the futon according to the present invention not only has the unique advantages of soft urethane foam, such as being lightweight and having excellent breathability and heat retention.
It can be suitably used as a normal mattress on which the body is directly laid, and it has remarkable effects such as being foldable.

[Brief explanation of the drawing]

Figure 1A is a perspective view showing the entire futon according to an embodiment of the present invention, Figures B and C are sectional views of its main parts, and Figure 2 is a sectional view showing another embodiment of the invention. ,
FIG. 3A is a sectional view showing a conventional folding pinerest made of soft urethane foam, and FIG.
is a sectional view showing the folded state. 10, 20, 30...Cushion body area, 4
0,50...boundary area, 11,21,31...soft urethane foam sheet, 12,22,32,
42...cloth, 41...cotton, 60...futon outer material, 6
1... Sewing part, 62... Overlocking part.

Claims (1)

[Scope of utility model registration request] Multiple cushion blocks made of soft urethane foam sheets of arbitrary thickness with breathability of 80 c.c./cm ² /sec or more are wrapped in cloth and arranged in series at predetermined intervals so that the entire cushion block is the size of a futon. At the same time, the cushion blocks are lined up and lined up, and the hardness 5Kg/JIS is made of cotton or cut into stripes between these cushion blocks.
A futon filled with the following ultra-soft urethane foam, wrapped entirely with a futon outer material, sewn around the circumference, and provided with overlock portions at appropriate locations.