JPH0510929B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a cushion material for pinerests.

(Prior Art and its Problems) Typical conditions generally required for pine tresses include appropriate cushioning properties and breathability.

In other words, in terms of cushioning properties, the pinerest must be flexible at least on the side that touches the body, but if the entire body is flexible, the body will sink unnaturally due to the body weight, making it uncomfortable to sleep, making it difficult to turn over, and causing fatigue. As the body grows larger, the cushion material needs to have a certain degree of rigidity to prevent the body from sinking unnaturally.

Conventional cushion materials with appropriate rigidity include, for example, hard synthetic resin foam boards, spring structures in which many coil springs are installed vertically and horizontally, or Japanese Patent Application Laid-open No. 52-152573, Japanese Patent Publication No. 61-1982.
As disclosed in Publication No. 36954, etc., there is a method in which countless crimped staples are formed by needle processing as necessary, and the joining points of each staple are bonded and held with adhesive. The latter two also have excellent breathability. The above-mentioned cushion material is made flexible in the vicinity of the body-contacting surface and in the vicinity of the opposite surface by, for example, laminating flexible cushioning materials with a small spring constant on the upper and lower sides to fill the mattress.

By the way, most modern beds, especially those used by patients in hospitals, etc., are constructed with undulating floorboards, and the mattresses used in such beds must bend to follow the undulations of the floorboards. . However, as mentioned above, cushion materials with moderate rigidity are difficult to bend due to their rigidity, and if a pinerest made of cushioning material is used in the bed described above, a portion of the cushion material may bulge out when bent.
It is easy to lose its shape or get damaged, and there are problems such as gradually becoming uncomfortable to sleep on and deteriorating its durability.

The present invention was devised in view of the above-mentioned problems, and meets the above-mentioned requirements for the pine tress cushion material, namely, appropriate rigidity to prevent the body from sinking unnaturally, a body-contacting surface, and The object of the present invention is to provide a cushion material that satisfies both flexibility near the opposite surface and appropriate bendability.

(Means for Solving the Problems) The structure of the present invention for achieving the above-mentioned object will be explained with reference to FIGS. 1 to 6 corresponding to the embodiments. to the body,
A flat plate-shaped member made by inserting a needle in the thickness direction and performing needle processing is continuously bent in the vertical direction,
The corrugated members are connected to form a corrugated member, the corrugated members are arranged in two upper and lower stages, the connected portions are arranged in a line in the vertical direction, and a sheet member is interposed between the corrugated members connected in the upper and lower two stages. The upper and lower corrugated members are adhesively bonded to each other via the sheet member.

(Function and Examples) The function of the cushion material of the present invention described above will be explained together with the configuration of the example shown in the drawings.

In FIG. 2, reference numeral 1 indicates a needle processing machine, and reference numeral 2 indicates an accumulation of countless crimped staples. The material, fineness, and length of the crimp staple 2 can be appropriately selected from, for example, the following.

Material: polyester, polyethylene, polypropylene fiber, or composite fiber thereof Fineness: 30 to 1000 (denier) Length: 25 to 200 (mm) The plate member 4 is formed by piercing and needle processing. Before needling, countless crimped staples, which existed simply at random as shown in FIG. As shown in FIG. 3b, in the portion where the staple passes through and its vicinity, the proportion of staples oriented in the thickness direction increases. As a result, the flat plate member 4 has different cushioning properties in the thickness direction and in the spreading direction perpendicular to the thickness direction, that is, as shown in FIG. 5a, the spring constant is smaller in the thickness direction. It is large in the direction of expansion.

The flat member 4 constructed as described above is first bent continuously in the vertical direction and connected to form a wave-shaped member 4' as shown in FIG.
In the figure, reference numeral 6 indicates a bent portion, and 7 indicates a connecting portion. The corrugated member 4 may be held by an appropriate method such as sewing 10 performed together with the covering sheet 8, adhesion or welding, and a firm corrugated member 4' can be produced by such a method.

The performance of such a corrugated member 4' will be explained with reference to FIG. On the other hand, when the strain exceeds a predetermined value, the change in strain with respect to a change in load becomes small, that is, the spring constant becomes large. Strain up to a predetermined value is considered to be strain in the bent portion 6, and therefore, the corrugated member 4' has cushioning properties similar to those obtained by laminating flexible cushioning materials on the upper and lower sides of a rigid cushioning material. I understand.

The cushion material 5 of the present invention has a connecting portion 7 in which the corrugated member 4' constructed as described above is arranged in two stages, upper and lower.
are arranged in a line in the vertical direction. In the method of connecting the upper and lower parts in two stages, a sheet member 9 is interposed between the upper and lower corrugated members 4', and the two are adhered via the sheet member 9.
This method has the advantage that the joining is easy; however, in some cases, the corrugated members 4' having an upper and lower structure may be joined by appropriate means without interposing the sheet member 9.

The cushion material 5 of the present invention is covered with a suitable covering member to constitute a mattress.

When using the mattress constructed as described above, the user's weight is applied to the cushion material 5 from the upper bent portion 6u through the connecting portion 7 to the lower bent portion 6l. Therefore, the top of the bent portion 6 corresponds to the thickness direction of the flat plate-like member 4, and as it goes toward the connecting portion 7, the bending portion 6 gradually shifts to the expanding direction. The spring constant is small. Therefore, since it is flexible,
The upper bent portion 6u supports the user's body flexibly, and the lower bent portion 6l cushions the impact. On the other hand, since the connecting portion 7 corresponds to the direction in which the flat plate member 4 spreads, it has a large spring constant and appropriate rigidity, thereby preventing the body from sinking unnaturally. As described above, the cushion material 5 of the present invention has cushioning properties similar to those obtained by laminating flexible cushion materials on the upper and lower sides of a rigid cushion material, as described above.

Next, when using a pinerest in a bed with a raised floorboard, for example, when the floorboard part that corresponds to the user's back is rotated and raised, the pinerest will move between this floorboard part and other floorboard parts. A load is applied in the upper bending direction with the upper position as the bending position.

Therefore, if the symbol C in FIG. 6 is the upward bending position, a compressive load is applied to the upper part and a tensile load is applied to the lower part of the connecting parts 7l and 7r on both sides of the position C, and these loads acts as a resistance to bending, but since the direction of these loads corresponds to the thickness direction of the flat plate-like member 4, which has a small spring constant, the resistance force is small, and therefore it can be easily bent. The gap d between the bent portions 6 of
This can prevent the member from bulging toward the bending side.

In the cushion material 5 of the present invention, the corrugated members 4 are constructed in two stages, upper and lower. In this two-stage construction, the connecting portions 7 of the upper and lower corrugated members 4 are aligned vertically. Since they are arranged and connected to each other, they essentially act as almost one connecting part. The great advantage of this two-stage configuration is that a thick wave-shaped member 4' is made from the flat plate-like member 4, and if this alone is used as a cushion material, it tends to lose its shape, but a thin wave-shaped member 4' is made. By making this into a two-stage structure, it is possible to create a firm cushion material that does not lose its shape.

As described above, the cushion material 5 of the present invention is
It satisfies all of the requirements: moderate rigidity to prevent the body from sinking unnaturally, flexibility near the body contact surface and the opposite surface, and moderate bendability. Incidentally, an accumulation of countless crimped staples 2
After needle processing, if necessary, as disclosed in the above-mentioned Japanese Patent Publication No. 61-36954, etc.,
The bonding points of each staple may be bonded with adhesive, or as another method, the outer periphery of each staple may be coated with a hot melt resin and melted to bond the bonding points to improve their bonding properties. In this case, such a joining operation, that is, spraying an adhesive or melting a hot melt resin, is performed after forming the corrugated plate shape, thereby making it possible to connect the joining points. , holding operations in the corrugated plate shape can be performed simultaneously.

Moreover, as mentioned above, the cushion material 5 of the present invention
It goes without saying that the mattress may be constructed using only this material as a stuffing material, or may be constructed using other cushioning materials in combination.

In addition, Fig. 5 a shows fineness of 100 denier and length of 50 mm.
In the collection 2 of polyester crimped staples, approximately
Needling is applied to about one piece per ^18mm2 ,
A load was applied in orthogonal directions to two of the test materials, each of which was made up of a flat plate member 4 with a thickness of 20 mm, which was laminated to form a cubic shape of 80 mm long x 80 mm wide x 80 mm high. This shows the results of measuring the relationship with strain. In addition, FIG. 5b shows that due to the flat plate member 4, l ₁ =90 mm and l ₂ =20 mm in the figure.
constitutes a cushion material 5, and this cushion material 5
This figure shows the results of measuring the relationship between load and strain.

(Effects of the Invention) As described above, the present invention provides a flat plate-like member formed by needle-processing an accumulation of countless crimped staples in the thickness direction, alternately and continuously in the vertical direction. Bend and connect to form a corrugated plate shape,
Since the cushion material is constructed by holding the cushion, it is possible to satisfy all of the following requirements: moderate rigidity to prevent the body from sinking unnaturally, flexibility near the body contact surface and the opposite surface, and moderate bendability. This has the special effect of providing good air permeability.

Further, in the present invention, the connecting portions are arranged and connected in a straight line, and the corrugated members are connected in two stages, upper and lower, so that the connecting portions can substantially act as one connecting portion. can. For this reason, by making the corrugated members thin and configuring them in two stages, this will combine with the structure in which the upper and lower corrugated members are adhesively bonded via the sheet member described above to prevent deformation. This method has the great advantage of being able to produce ideal cushioning materials that are free from sagging.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the structure of the cushion material of the present invention, in which a is a perspective view and b is an enlarged side view. FIGS. 2 and 3a and 3b are explanatory sectional views showing two parts of the process of constructing the cushion material of the present invention. FIG. 4 is an enlarged explanatory cross-sectional view of the main part of a wave-shaped member, and FIGS. 5 a and b are a flat plate-like member,
FIG. 6 is an explanatory diagram showing the relationship between load and strain of a wave-shaped member, and FIG. 6 is an enlarged explanatory diagram of the main part of the cushion material of the present invention. Code, 1... Needle processing machine, 2... Accumulation of crimp staples, 3... Needle, 4... Flat member, 5... Cushion material, 6... Bent portion, 7... Connecting portion, 8... Covering sheet, 9... Sheet. Components, 10...Sewing processing.

Claims (1)

[Claims] 1. A flat plate-shaped member made by inserting needles into an accumulation of countless crimped staples in the thickness direction to perform needle processing is continuously bent in the vertical direction and connected to form a wave-shaped member, and this waveform The shaped parts are arranged in two stages, upper and lower, and the connected parts are arranged vertically in a line,
A cushion material for a mattress, characterized in that a sheet member is interposed between the corrugated members connected in two stages, upper and lower, and the upper and lower corrugated members are adhesively bonded via the sheet member.