JP2020036747A - Elastic body local distortion reduction sheet - Google Patents

Abstract

To provide an elastic body local distortion reduction device which can be easily attached to an elastic body being used on a bed or a sofa and easily moved and adjusted to a position where a user himself/herself can feel actually, an effect for suppressing occurrence and a degree of backache.SOLUTION: There is provided a partial sheet in which, a non-extensible fabric (elongation is 5% or smaller: in accordance with a measurement method JIS L 1096/2010 B method) is used as a fabric base, elongation suppression sewing is performed in both oblique directions with respect to lengthwise and crosswise fibers forming the fabric base for securing non-elongation property of the fabric base, the partial sheet has a surface friction at a degree at which, when a load occurs, the partial sheet tightly adheres to an elastic body which is a coating object and the partial sheet does not move, the partial sheet mainly coats whole width direction of the elastic body at a position from the surrounding of a lumbar to a hip of a user, the partial sheet is directly laid on the elastic body or both right and left ends of the sheet are suspended or the ends are wound to the elastic body.SELECTED DRAWING: Figure 5

Description

The present invention relates to an apparatus for reducing local strain of an elastic body caused by a local load.

  Most furniture that supports the body, such as beds and sofas, have a structure that supports the body with the rebound resilience of an elastic body such as a coil spring or urethane foam, but if the rebound resilience is too small for the user, the buttocks, which are the load concentrated parts, Is excessively warped or deformed (Figs. 1 and 4) in the lumbar spine compared to the most natural state of standing (Figs. 1 and 1). 1 and 6 also hinder the change of posture while sleeping, and the deformation and compression of the lumbar spine inhibits blood flow during sleeping, which causes physical problems such as lower back pain. As a conventional device for reducing such excessive local distortion, a mattress or a cushion placed on the furniture is known. (Non-Patent Documents 1, 2, and 3)

No. 3162266 JP 2013-99496 A No. 3210097

http://motton-japan.com/lp/mat/ http://www.truesleeper.jp/memory-foam-benefits-pain/ https://www.dinos.co.jp/p/1330801735/

A mattress as a conventional local sinking reduction device is placed on furniture (bed / sofa) to compensate for the rebound resilience of the elastic body of the furniture and to disperse the body pressure to increase the area in contact with the user, thereby providing a cushion. Is a partial complement to the rebound resilience of furniture elastics, each reducing local sinking. However, there are the following problems.

<1> A conventional local sinking reduction device having a uniform rebound resilience (Non-Patent Documents 1, 2, and 3) is a product in which the rebound resilience is insufficient according to the user's physique, body shape, and weight. It was difficult to reduce the excessive local strain except for the replacement.

    <2> A conventional local sinking reduction device includes one in which the rebound resilience of a specific portion (such as a waist) of an elastic body is adjusted and strengthened (Patent Documents 1, 2, and 3). If it is not in an appropriate position for each individual physique, body shape and weight, or if the rebound resilience is insufficient, it is difficult to reduce excessive local strain. It was difficult for the user himself to easily make adjustments.

<3> Conventional mattresses are large enough to cover the entire bed and large in area, volume, and weight to move alone, so that maintenance such as moving, washing, and drying is difficult.

In order to solve the above-mentioned problems, the present invention provides an apparatus which is attached to an elastic body of furniture to correct the rebound resilience. According to the present invention, the stress of an elastic body (elastic body of furniture of a bed or a sofa or an elastic body of a mattress / cushion placed thereon) generated by a local load is widely dispersed and generated also in the non-local portion of the elastic body. By doing so, the device reduces the local stress and reduces the local strain proportional to the stress.
More specifically, it is a partial sheet of fabric that covers the load surface of the elastic body, is inextensible, and has a surface friction that is close to the elastic body and does not move when strain occurs due to local load. When a local load is applied to the elastic body, a tension is generated and a stress is generated on a contact surface with the elastic body, thereby having an effect of reducing local strain of the elastic body. (3 in FIG. 2).

When the sheet of the present invention is coated on an elastic body of a bed or a sofa and a local load is applied thereto, the sheet of the present invention is pushed down vertically below the local load, and the sheet of the present invention around the edge of the local load at the edge of the local load. Has the effect of drawing diagonally in the load direction. Since the sheet of the present invention is inextensible and closely adheres to the elastic body due to surface friction and does not move, tension is generated in the sheet of the present invention. (FIG. 3).

Since the sheet of the present invention covers the elastic body across the width direction of the elastic body mainly at the position from the periphery of the lumbar vertebra to the buttocks of the user, the contact point between the sheet and the elastic body is other than immediately below the local load. In a wide range, where the above-mentioned stress occurs. Since the sum of the stresses generated in the elastic body is balanced with the local load, the local stresses are reduced only by the stresses generated in other portions, and the strain (subsidence) proportional thereto can be reduced. (6 in FIG. 2)

  <1> In the present invention, the resilience of the elastic body of a bed or a sofa or the conventional local strain reduction device mounted for the purpose of complementing the resilience is insufficient for the user's physique, body shape and weight. This has the effect of reducing excessive local strain (subsidence) caused by this.

<2> The present invention has the effect of facilitating the individual user to adjust and move to a position where the user can feel the effect in accordance with his or her physique, body shape, and weight. (FIG. 4)

<3> The present invention is a small and light partial sheet that is sufficiently small to be moved alone, and has an effect of facilitating maintenance such as relocation, washing, and drying.

  <4> The present invention has an effect of delaying the occurrence of rebound resilience attenuation (so-called “sagging”) due to local fatigue deterioration of the elastic body to be coated.

Lumbar spine and stress condition in bed Lumbar spine and state of stress when sheets are mounted according to the present invention (a) Longitudinal section (b) Transverse section (c) Plan view The state of the tension and the stress of the elastic body of the sheet of the present invention before and after the load is generated (a) Before the load is generated (b) After the load is generated Change of local load position due to difference in physique and stress state of elastic body Configuration of the sheet of the present invention (a) Front and back configuration of the sheet of the present invention (b) Cross section of the sheet of the present invention A method of mounting the sheets of the present invention on a bed (a-1) Laying axeogram (a-2) Laying cross-sectional view (b-1) Both-end drooping axome diagram (b-2) Both-end drooping cross-sectional view (c-1 ) Axome drawing of end winding (c-2) Cross section of end winding The method of mounting the sheets of the present invention on a sofa (a-1) Horizontal both-side drooping axome diagram (a-2) Horizontal both-side drooping side view (b-1) Vertical both-side drooping axome diagram (b-2) Vertical both-side drooping side view (c-1) Axome drawing with end winding (c-2) Side view with end winding

The present invention uses an inextensible cloth (elongation rate of 5% or less: according to the measurement method JIS L 1096/2010 B method) as a base cloth, and applies a local load to an elastic body to be mounted when the elastic body is subjected to a local load. It has a surface friction of such a degree that it does not move in close contact, and covers the elastic body at the position from the periphery of the lumbar vertebra to the buttocks mainly in the width direction of the elastic body, and is laid directly on the elastic body or with the elastic body. In order to reinforce the adhesion, the left and right ends are hung down or the ends are wound around the elastic body to take a form of partial sheets. (Fig. 5)

In order to secure the inextensibility of the base fabric, the vertical and horizontal fibers constituting the base fabric may be sewn to prevent stretching in both oblique directions. (FIG. 5, 302)

In order to ensure surface friction with the elastic body, liquid rubber or a synthetic resin-based anti-slip agent may be applied to the back surface of the base fabric in a dot or line shape, or sheets for preventing displacement may be attached. (FIG. 5, 303)

In order to ensure surface friction with the elastic body, pockets may be provided in the hanging portions at both ends, and a weight may be inserted therein to increase the adhesion to the elastic body. (FIG. 5, 304)

Partial sheet for bed to be laid down in a direction crossing the elastic body of the furniture at a position where the buttocks ride from around the lumbar vertebra of the bed user, hanging both ends down, or winding the ends around the elastic body and attaching it (FIG. 6).

  A partial sheet for a sofa to be worn from around the lumbar spine of the user of the sofa, to the buttocks, or to a position where the buttocks ride, in a direction crossing the elastic body of the furniture, with both ends hanging down, or with the ends wound around the elastic body (FIG. 7). .

Bedding supplements Furniture supplements Care hospital supplements

1: Standing body posture 11: Body posture with deformed lumbar spine 12: Body posture with reduced local sinking 13: Standard physique body 14: Small physique body 15: Large physique body 16: Buttocks 2: Elastic body 3: Sheets 30 of the present invention 30: Sheets of the present invention laid down 31: Sheets of the present invention attached at both ends hanging down 32: Sheets of the present invention attached at end winding 33 : Sheet mounting state of the present invention with the end wound on the sofa 34: Sheet surface of the present invention 35: Sheet back of the present invention 301: Base cloth 302 of the sheet of the present invention: Stretch-proof sewing 303: Anti-slip agent (liquid rubber)・ Synthetic resin anti-slip agent)
304: Weight pocket for close contact 305: Weight for close contact 4: Deformed lumbar vertebra 5: Stress of elastic body 6: Strain (subsidence)
61: Local sunken part 7: Load 71: Force to pull in sheets by load 8: Tension of sheets of the present invention 81: Contact point A between elastic body and sheet
82: Contact B between the body and the sheet
9: Stress against elastic body tension 91: Vertical stress on elastic body 92: Horizontal stress on elastic body

In order to secure inextensibility even in the oblique direction of the base fabric, stretch-sewn sewing is performed on the vertical and horizontal fibers constituting the base fabric in both oblique directions using the inextensibility of the fibers . (FIG. 5, 302)

To ensure the surface friction of the elastic body, when mounting by hanging the ends may enhance the adhesion between the elastic member by inserting the weight into the provided pockets depending portion. (FIG. 5, 304)

Claims (4)

  Using a non-stretchable fabric (elongation rate 5% or less: according to the measurement method JIS L 1096/2010 B method) as a base cloth, it moves in close contact with the elastic body when local elasticity occurs in the elastic body to be mounted. Has a degree of surface friction that does not cover the entire width direction of the elastic body mainly at the position from the periphery of the user's lumbar vertebra to the buttocks, directly lays on the elastic body, or hangs both left and right ends, or ends Elastic body strain reduction sheets that are wound around an elastic body and attached    2. The elastic body local strain reduction sheet according to claim 1, wherein stretch sheets are sewn in both oblique directions on longitudinal and transverse fibers constituting the base fabric in order to ensure inextensibility of the base fabric.    2. A sheet for reducing local distortion of an elastic body according to claim 1, wherein a surface of the elastic body that is in contact with the elastic body is subjected to anti-slip processing or a non-slip sheet to increase the frictional force with the elastic body to be mounted.   2. The sheet according to claim 1, wherein a pocket into which a weight can be inserted is provided at a tip of a hanging portion at both ends.

Images