JPH05337958A - Production of cushioning member - Google Patents

Abstract

PURPOSE:To enhance workability by a method wherein a protective sheet and a spring unit are integrally connected by foaming and expanding the foamable elastic material injected into a mold to form an elastic material with a predetermined thickness and a large number of through-holes are formed to the elastic material along the axial line of a spring by the pins formed to the mold so as to piece the elastic material up and down. CONSTITUTION:Since a cushioning member is formed in such a state that a spring unit 1, protective sheets 5 and elastomers 12 are integrally bonded, it is prevented that three of them are rubbed with each other during use to generate unpleasant sound. Further, the load applied to the elastomers 12 is widely dispersed and springs 2, the protective sheets 5 and the elastomers 12 are integrally cooperated without receiving local conc. load by the springs 2 to be elastically deformed to show good cushioning properties. Since a large number of through-holes 13 are provided to the elastomers 12, the air permeability in the spring unit 1 becomes good and, when this cushioning member is used in a matress, moisture is not stagnated in the matress and the matress can be sanitarily used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion body used for a mattress or the like.

[0002]

2. Description of the Related Art In general, a cushion body used for a mattress or the like has a spring unit formed by connecting a number of coil springs in a flat plate shape with helical wires, and protecting the elastic body locally on the upper and lower surfaces of the spring unit. The protective layer such as sisal and the elastic body such as urethane foam are polymerized for the purpose of preventing the falling, and they are covered with a metal cloth or the like and clipped to the peripheral portion of the spring unit. Then, the mattress and the like are formed by covering them with an outer fabric sewn in a bag shape.

[0003]

However, when the cushion body as described above is used in a mattress, the protective layer and the elastic body are not integrated with the spring unit.
During use, the protective layer rubs against the spring unit,
A problem that the protective layer and the elastic body move or damage the protective layer and the elastic body at an early stage, a problem that an unpleasant noise is generated and the sleeping comfort becomes bad, and a protective layer and the elastic body are provided in the spring unit. There is a problem that the workability is poor because it has to be fixed to the, and the breathability of the elastic body is not good, so that when the cushion body is used as a mattress, the breathability in the mattress is poor and it is not hygienic.

[0004]

The present invention has been made based on the above circumstances, and an object thereof is to provide a method for manufacturing a cushion body which solves the above problems. Therefore, according to the present invention, a protective sheet having a large number of meshes formed on its upper and lower surfaces is provided in a box-shaped mold having an open upper surface and a large number of pins protruding upward on its inner surface. Place the laid spring unit in the mold along the axis of the coil spring of the spring unit, passing through the protective sheet with the tip of the pin provided on the mold, and keeping a certain distance from the inner surface of the mold. Then, a foaming machine was used to inject and foam a predetermined amount of foamed elastic material into the mold to form an elastic body having through holes vertically penetrating on the protective sheet surface to manufacture a cushion body.

[0005]

The foamed elastic material injected into the mold expands and expands to integrally combine with the protective sheet and the spring unit to form an elastic material having a predetermined thickness. At this time, a large number of vertically extending through holes are formed in the elastic material by pins formed in the mold along the axis of the coil spring.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a spring unit. This spring unit 1 has a large number of coil springs 2 ...
4 is attached and formed. A protective sheet 5 made of a material such as synthetic resin and having a large number of meshes 5a is laid on the upper and lower surfaces of the spring unit 1. Then, the spring unit 1 is installed in the mold 6. The mold 6 is a rectangular plate and has a box-shaped inner surface 7 formed to be larger than the spring unit 1 and a wall portion 8 surrounding the inner surface 7 around the inner surface 7 and standing up to a predetermined height. Is formed in. The inner surface 7 has a thickness higher than that of an elastic body 12 of a cushion body 14, which will be described later, and the wall portion 8 is formed.
The number of pins 9 is set lower than that of the coil springs 2 and the pitch 9 between the coil springs 2 of the spring unit 1 is maintained at the same interval.

The axis of the coil spring 2 is made to correspond to the pin 9 provided upright on the inner surface 7 of the mold 6, and the tip of the pin 9 passes through the mesh 5a of the protective sheet 5 to the middle of the coil spring 2. Positioned in the area, spring unit 1
One surface of the spring unit 1 is installed in the mold 6 in a suspended state by a suitable method while keeping a predetermined distance from the inner surface 7 of the mold 6. Then, a predetermined amount of the foam elastic material 11 is injected into the mold 6 from the foaming machine 10. Injected foam elastic material 1
1 starts foaming and expands above the mold 6, covers the upper surface of the protective sheet 5 and further expands to pass through the mesh 5a of the protective sheet 5 and covers a part of the coil spring 2. Protection sheet
An elastic body 12 having a predetermined thickness is formed on the belt 5. The elastic body 12 is integrally connected to the protective sheet 5 and the spring unit 1 and has a through hole 13 vertically penetrating along the axis of the coil spring 2 by a pin 9 of the mold 6. After the above steps are completed, the upper and lower surfaces of the spring unit 1 are reversed and the above steps are performed again to form the elastic bodies 12 on the upper and lower surfaces of the protective sheet 5 to manufacture the cushion body 14 shown in FIG. To do. According to the above method, the elastic body 12 is attached to the spring unit 1 as in the conventional case.
Further, it is not necessary to fasten it with a clip or the like, and workability can be improved.

The cushion body 14 manufactured by the above method is used as a mattress by being covered with, for example, a bag-shaped exterior material. Therefore, the cushion body 14 having the above structure
According to this, since the spring unit 1 and the protective sheet 5 and the elastic body 12 are integrally formed, the three members do not rub each other during use and an unpleasant noise is generated. Further, the load applied on the elastic body 12 is widely dispersed, and the spring 2, the protective sheet 5, and the elastic body 12 cooperate integrally to elastically deform without the spring 2 receiving a localized concentrated load. And exhibits good cushioning properties. Further, since the elastic body 12 is provided with a large number of through holes 13, the ventilation in the spring unit 1 is improved,
When used as a mattress, it does not collect moisture inside and can be used hygienically.

[0009]

As described above, according to the present invention, a mesh formed on the upper and lower surfaces of a box-shaped mold having an open upper surface and a large number of pins protruding upward on the inner surface thereof. The spring unit with the protective sheet laid is positioned so that the tip of the pin provided on the mold passes through the mesh of the protective sheet and is located midway along the axis of the spring to maintain a predetermined distance from the inner surface of the mold. A cushion body was manufactured by placing and injecting a predetermined amount of a foamed elastic material into the mold by a foaming machine to foam it to form an elastic body having through holes vertically penetrating on the protective sheet surface. Therefore, it is possible to manufacture the cushion body by forming through holes vertically penetrating the elastic body integrally connected to the spring unit and the protective sheet. Further, since it is not necessary to clip the elastic body to the spring unit, workability in manufacturing can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a mold with a spring unit installed.

FIG. 2 is a sectional view of a cushion body.

FIG. 3 is an enlarged sectional view of an elastic body.

[Explanation of symbols]

 1 Spring Unit 2 Coil Spring 5 Protection Sheet 6 Type 7 Inner Surface 8 Wall 9 Pin 10 Foaming Machine 11 Foaming Elastic Material 12 Elastic Body 13 Through Hole 14 Cushion Body

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area B29L 31:58 4F

Claims (1)

[Claims] 1. A spring unit is formed by connecting a number of coil springs in a flat plate shape, a protective sheet is laid on the upper and lower surfaces of the spring unit, and a foamed elastic material is foamed on the protective sheet surface. In a method of manufacturing a cushion body by molding and forming an elastic body having a through hole extending vertically, a mold formed in a box shape with an upper surface opened and a large number of pins protruding upward on the inner surface thereof. Inside, a spring unit in which a protective sheet having a large number of meshes formed is laid on the upper and lower surfaces, the tip of a pin provided in the mold passes through the protective sheet, and It is located at a midpoint along the axis, and is installed with a predetermined distance from the inner surface of the mold, and a predetermined amount of foamed elastic material is injected into the mold by a foaming machine to cause foaming and then onto the protective sheet surface. , The above protection sheet A method of manufacturing a cushion body, wherein an elastic body having a through hole that is integrally connected to the belt and the spring unit and vertically penetrates is formed to manufacture the cushion body.