JPH11216042A - Core for futon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sleeping confortableness by using synthetic resin foam bodies of two kinds or more of different hardness and properly arranging each foam body corresponding to a body pressure distribution of body portions when futon is used, in a core for futon coated with a cushion material for coating and further is coated with an outer material. SOLUTION: A core 1 for futon 6 is constituted of four pieces of soft polyurethane foam (hereinafter referred to as foam bodies) 1 to 4 which are set to hardness corresponding to a body pressure distribution of the head part, breast part, the waist part and the leg part. As this time, the end faces of respective foam bodies 1 to 4 are formed vertical and adjacent foam bodies are joined and integrated with adhesive of an urethane-based emulsion type. At this time, each 1/4 of thickness direction of one end face of the longitudinal direction is preferably left from front and rear surfaces, an adhesive is applied to width of 25 mm at the center part and the foam bodies are connected with each other. The core 1 obtained is coated with polyester raw fiber 7 to be a cushion body, further the outside is coated with an outer material 8 made of cotton cloth and futon is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core for a mattress, and more particularly, to a core made of a synthetic resin foam. The present invention relates to a mattress core having different elasticity.

[0002]

2. Description of the Related Art In general, a core for a mattress is rich in elasticity.
An elastic member is used as the core, and if the hardness of this core material is constant and tends to be soft overall, the part of the body with a high weight balance sinks at bedtime, and the posture at bedtime You will not be able to sleep comfortably because of collapse. Further, if the body tends to be stiff as a whole, too much pressure is applied to a portion where the body weight balance is heavy, so that it is impossible to obtain comfortable sleep. The body at bedtime, especially at the waist, is about 4% of the total weight.
4%, followed by about 33% of the chest, about 15% of the legs,
It is said that the head makes up about 8%. Further, in terms of body shape, a burden is likely to be applied to the waist and chest depending on the posture at the time of going to bed. Therefore, conventionally, a tri-fold mattress in which the hardness of the central portion of the mattress is increased and the hardness of both end portions thereof is smaller than that of the central portion has been developed and manufactured (for example, see Japanese Utility Model Application Laid-Open No. 52-75509). However, these materials do not have a mattress hardness shape corresponding to the body part, so that it was impossible to maintain a correct and balanced bedtime posture. The weight of the chest and the head with the least weight tend to be of the same hardness, which tends to put a burden on somebody, or the waist and chest may come together, or Is spread over two places having different hardnesses, resulting in that a load is applied to some places. Therefore, a sufficient effect of partially changing the hardness may not be obtained. The same problem could have occurred with the mattress core. In the past, as the mattress, the mainstream was to coat cotton or polyester cotton with an outer skin made of cloth, etc., but as interest in sleep-related items increased to obtain a comfortable sleep, comfort during use was increased. The tendency to attach importance is increasing. Therefore, a mattress in which a cushioning core is covered with a water-absorbing and breathable covering cushioning material has been proposed. However, there are few of them corresponding to the hardness corresponding to the body part, and a comfortable use feeling cannot be obtained.

[0003]

Therefore, considering that the load (that is, body pressure) applied to each part of the human body, such as the head and the waist, on the mattress when the human is in the sleeping position, is different from that at the time of sleeping. To further improve the sleeping comfort of
It is more desirable that the core for the mattress used for the purpose of cushioning has a different elasticity for each part so that its elasticity corresponds to the body pressure of each part of the human body. Therefore, the elasticity of each part is different, and it is desirable to subdivide as much as possible so that the body pressure and the shape of the human head, chest, waist, and legs can be appropriately supported. In addition, it is necessary that the core for the mat should not interfere with comfortable sleep during use.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a synthetic resin foam having two or more different hardnesses in a mattress for a mattress, wherein the core is covered with a covering cushion material, and further covered with an outer cover. The synthetic resin foam of each hardness is arranged corresponding to the body pressure distribution of the body part at the time of using the mattress, and the length of the synthetic resin foam in the length direction of the mattress when using the mattress is also And a middle part for a mattress, which corresponds to the length of the body part of the subject.
In a more preferred aspect of the present invention, a plurality of areas having different hardnesses are composed of four areas corresponding to the head, chest, waist, and legs of the corresponding body part, and the length ratio of each area is determined for the mattress. 18 to 2 for the total length of the core
2%, 21% to 25%, 25% to 29%, 28% to 32%, and the hardness of each part is in the relationship of waist>chest>leg> head. Regarding the core. The hardness of the four areas corresponding to the head, chest, waist and legs is 8 to 15 kg, 11 respectively.
１８18 kg, 13〜23 kg, 9〜16 kg.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The core for a mattress of the present invention is made of a synthetic resin foam having two or more kinds of hardness, and this synthetic resin foam is generally used as a core material of a mattress for bedding. Any material can be used as long as it is a flexible polyurethane foam, polyethylene foam, or a synthetic resin foam such as polystyrene foam.It is preferable to use a soft polyurethane foam in terms of processability and hardness. Foams can be used particularly preferably. In addition, the above synthetic resin foam may be used in combination as long as the hardness can be adjusted. For example, a polystyrene foam for the head, a polyurethane foam for the chest and legs, and a polyethylene foam for the waist may be used. .

[0006] As the cushioning body for covering the core, cotton,
Natural fibers such as silk, wool and feathers, natural materials, cotton-like bodies made of synthetic fibers such as nylon, polyester and acrylic, and non-woven fabrics and synthetic resin foams such as polyurethane foams can be used. These cushioning materials for covering may be used in combination.The core is first covered with polyester cotton, the periphery thereof is covered with a polyurethane foam profile cut sheet, and then the outer skin is covered. Good. Further, the covering cushion body may be formed into a bag shape, and the mattress core of the present invention may be inserted. In this case, if the insertion opening is provided with a hook-and-loop fastener or the like, it becomes possible to prevent the inserted core from shifting or the like.

[0007] As the outer shell material, those usually used may be used, and woven or knitted fabrics such as natural fibers and synthetic fibers may be used.
A sewn bag can be used.

Usually, this core has a thickness of 20 to 100
mm and one kind of material is stored. However, the core for mattress of the present invention uses two or more kinds of synthetic resin foams having different hardnesses integrated into one core in the length direction of the mattress. Features. Examples of the method for integrating the synthetic resin foams include, for example, a method of simultaneously or continuously forming synthetic resin foams having different hardnesses, and a method of connecting synthetic resin foams having different hardnesses with an adhesive or the like. There is a method of partially providing slits, grooves, holes and the like in one kind of synthetic resin foam, and a method of changing the hardness of the provided portion and other portions, and any method can be used. Good. However, care must be taken to ensure that the hardness of this connection does not differ significantly from the hardness at both ends, and it is necessary to perform integral processing so that the connection does not feel uncomfortable when using the mattress. In some cases, the shape and the like are used.
As the adhesive, a water-soluble adhesive or a sheet-like hot-melt adhesive is preferable from the viewpoint of the working environment and the like, and an adhesive whose adhesive surface does not harden more than other parts is preferable.

For example, when the adhesive is applied to the joint surface of the synthetic resin foam, the adhesive is not applied to the entire joint surface.
The coating may be applied to the central portion and not applied to the peripheral portion and the surface portion, as long as the joining strength is not hindered. Further, the joining surface may have a phase-recess structure, and the application surface of the adhesive may be limited to the phase-recessed portion. Further, cut surfaces having a diagonal joining surface may be bonded.

[0010] The hardness of the core for the mattress is determined by Japanese Industrial Standard JI.
The hardness may be determined according to a hardness test specified in SK6400. However, the present inventor considers the characteristics of the product, and uses a hardness test method according to JIS K6400 described below.
The hardness of the middle material of the bedding mattress was measured. 1. Test piece A test piece having a size that can include a circle having a diameter of about 30 cm from the center and having a thickness of 50 (48 to 55) cm is collected. However, the thickness direction of the test piece is the direction of foaming. 2. Test method The test piece was placed flat on a tester table as described in JIS K 6400, a circular pressure plate having a diameter of 200.0 ± 0.1 mm was placed on the upper surface of the test piece, and then a load was applied. The thickness of the test piece when the load was 0.5 kgf was measured, and this was taken as the initial thickness. 10mm /
s at a speed of 75% or less of the initial thickness, then immediately remove the load, and immediately press the circular pressure plate again for 10 m.
At a speed of not more than m / s, the original thickness is pushed by 40% of the thickness, and the load at the time when 20 seconds have passed after resting is read to the unit of 0.1 kgf. The hardness is the read load. The measurement is performed once.

[0011] When the core whose hardness has been adjusted as described above is covered with a covering cushion body and stored in a bag-like outer skin to form a mattress using the core for mattress of the present invention, each of the body parts The core of the hardness corresponding to the body pressure is accommodated in the length direction of the mattress. Therefore, a synthetic resin foam having hardness corresponding to a desired number of body parts may be prepared.

For example, in the case of preparing a mattress core corresponding to four parts on the head, chest, waist, and legs of a body part, the required length of each body part is determined by the overall length of the mattress for bedding. On the other hand, the head is about 18-22% and the chest is 21
腰 25%, waist 25２９29%, leg 28２８32%, it is necessary to prepare a synthetic resin foam having a hardness corresponding to each length.

The hardness corresponding to the four parts of the head, chest, waist and legs of the body part can be determined according to the weight ratio of each body part. Generally head, chest, waist,
The weight ratio of the legs is about 8 for the head relative to the total weight of the user.
%, Chest about 33%, waist about 44%, legs about 15%
Therefore, the relationship between the hardness of each of the waist>chest> leg ≧
Preferably, it is the head. Therefore, the head is about 8 ~
15kg, chest about 11-18kg, waist about 13-2
Preferably, the weight is 3 kg and the legs are about 9-16 kg.

In the above, the body was divided into four body parts, and the center of the mattress thus prepared was described. However, the ideal center of the mattress has a hardness completely corresponding to each part of the body. It is desirable to have, but the more this category is, the more cost, workability, or displacement of the position corresponding to the body occurs.For example, due to turning over at bedtime, the corresponding hardness part comes off, Since there is a possibility of moving to the hardened part, it is preferable that the body part classification is preferably about 4 to 10 divisions.

In addition, by setting the combination of the hardness of the mattress for the mattress according to the present invention according to the weight of the user, it is possible to set the hardness more corresponding to the body part. For example, the combination of the hardness of the mattress for the mattress of the present invention is set to 55 kg, 45 to 75 kg, 6
The mattress may be made up to 5 to 95 kg to make a mattress suitable for each weight. This allows the user to select a mattress having an ideal combination of hardness that matches his or her weight.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

Example 1 A mattress for a mattress according to the present example is as shown in FIG.
It is a core formed by processing from a flexible urethane foam, and has a width of 930 mm x a length of 400 mm x a thickness of 40 mm, a width of 930 mm x a length of 460 mm x a thickness of 40 mm, and a width of 930.
mm × length 550mm × thickness 40mm, width 930mm ×
570 mm long x 40 mm thick, a, b, c,
d) composed of four flexible polyurethane foams. The soft urethane foams a, b, c, and d are each set to a hardness corresponding to the body pressure distribution of the head, chest, waist, and legs.

In this embodiment, the end faces of the flexible polyurethane foams a, b, c and d all have vertical faces. A urethane emulsion-type adhesive was applied to each of the bonding surfaces in the width direction and integrated to obtain a core for mattress of the present invention having a width of 930 mm, a length of 1980 mm and a thickness of 40 mm.

The same adhesive is used for bonding each of the flexible urethane foams, except for one quarter in the thickness direction of one end face in the length direction from the front and back surfaces, and a width of 25 mm at the center portion. The end faces in the length direction may be connected and integrated. In addition, a, b, c, and d may be provided with through holes and the like to provide air permeability, thereby making it possible to further finely adjust the hardness of the urethane foam.

The hardness of each flexible urethane foam is different depending on the weight of the user, and the light hardness (L) for a person weighing 55 kg or less and the middle type for a person weighing 45 to 75 kg. (M), weight 6
Three types of hard types (H) were prepared for a person weighing 5 to 95 kg, and the hardness of the soft urethane foams a, b, c, and d is shown in Table 1.

[0021]

[Table 1]

Each core for mattress obtained in Example 1 was covered with polyester cotton, and covered with an outer skin sewn into a bag made of cotton cloth. The width was 1,000 mm and the length was 2050.
mm × 110 mm in thickness A mattress of the present invention was obtained. As a result of using the three types of mattresses obtained by a person suitable for each body weight, the mattress has a hardness suitable for the body pressure of each part. did it.

[0023]

As can be seen from the above description, according to the present invention, the core for a mattress molded from soft urethane foams having different hardnesses, and since the mattress is a mattress, a human head in a sleeping position, The present invention provides a mattress core and a mattress that can appropriately support the chest, the waist, and the legs according to their body pressures, and can provide more comfortable sleeping comfort than before. In addition, by changing the combination of hardness for each body weight, there is provided a mattress core and a mattress that can provide comfortable sleeping comfort to all persons.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a mattress according to a first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Core for mattress 2 ... Soft urethane foam a 3 ... Soft urethane foam b 4 ... Soft urethane foam c 5 ... Soft urethane foam d 6 ... Mattress 7 ... Coating Cushion body 8 ・ ・ ・ Skin 11 ・ ・ ・ Adhesive coated surface (joining surface)

Claims (4)

[Claims] 1. A core coated with a covering cushion material,
2 different in the mattress core further covered with the outer skin
It is composed of synthetic resin foams of more than one kind of hardness, and the synthetic resin foams of each hardness are arranged corresponding to the body pressure distribution of the body part at the time of using the mattress, and the respective synthetic resin foams The center of the mattress, characterized in that the length of the mattress in the longitudinal direction also corresponds to the length of the body part when the mattress is used. 2. Synthetic resin foams having different hardnesses are composed of four areas corresponding to the head, chest, waist, and legs of the corresponding body part, and the ratio of the length of each area is the entire core for the mattress. 18-22%, 21-
The core for a mattress according to claim 1, wherein the hardness of each part is in the relationship of waist>thorax>leg>head> 25%, 25-29% and 28-32%. . 3. The hardness of the four areas corresponding to the head, chest, waist and legs is 8 to 15 kg, 11 to 11, respectively.
3. The mattress core according to claim 2, wherein the core is 18 kg, 13 to 23 kg, and 9 to 16 kg. 4. The core is covered with a covering cushion material,
Furthermore, in the mattress covered with the outer skin, the core is composed of synthetic resin foams of two or more different hardnesses, and the synthetic resin foams of each hardness are arranged corresponding to the body pressure distribution of the body part when using the mattress. Also, the length of each synthetic resin foam mattress in the longitudinal direction also corresponds to the length of the body part when using the mattress, and the covering cushion material covers at least the entire surface of the core. A mattress characterized by becoming.