Apparatus for packing free terminal convolutions of spring assembly used in mattress

Abstract

There is provided an innerspring assembly used in a mattress for absorbing external loads. An outermost coil spring (115) of a spring array (110) is secured in a space between upper and lower border wires (120 and 120') by pins (140), and helical coils (130) are disposed in row directions (R) on upper and lower portions of the spring array (110) to knit an adjacent coil spring (115), such that each coil spring has a free terminal convolution (115a) protruded from an upper portion of the upper border wire (120) and / or a lower portion of the lower border wire (120'). The spring assembly includes an enclosure (10) partially or fully provided on an upper end portion and / or an lower end portion of the coil spring for covering the terminal convolution (115a) in the row direction (R) or column direction (L), thereby interrupting interference between the terminal convolution (115a) and the upper and / or lower border wire (120 and 120') and absorbing a lateral load applied to the terminal convolution. A padding member is not damaged by the terminal convolution, and a contact resistance between the upper border wire and the terminal convolution is absorbed to block a frictional noise.

Description

technical field [0001] The present invention relates to an innerspring assembly for mattresses for cushioning external loads, and in particular to a device for wrapping the free end winding turns of a spring assembly for mattresses, by means of which the protruding The end turns of the upper and / or lower surface of the spring assembly are wound to break the conflict between the wrap and the backing member. Background technique [0002] In general, a spring assembly having free end winding turns (hereinafter referred to as a spring assembly) and each pad member placed on the upper and lower surfaces of the spring assembly together constitute an elastic body that can function as a cushion and has a shock-absorbing function. The spring assembly consists of a plurality of coil springs arranged side by side, usually in parallel arrangements in columns and rows. [0003] When the coil spring is evenly arranged in the upper and lower directions of the upper and lower boundary stee...

AI Technical Summary

Problems solved by technology

[0007] Based on a cross-section of the spring array 110, the end coils 115a of the coil springs 115 protrude outwards beyond the upper and lower boundary wires 120 and 120', in this case when a lining made of, for example, non-woven fabric or silk floss When the pad member 150 is stacked on the upper surface and the lower surface of the spring array 110 and surrounded by a cover, as figure 2 As shown, the backing member 150 and the end winding turn 115a are in contact with each other, thus causing damage to the backing member

[0008] In addition, if the end winding turns 115a are deflected in one direction by an external force applied to the mattress, the spring assembly 100 faces a problem that the elastic force of the coil spring 115 is deteriorated due to the load being concentrated at one point.

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