KR102131594B1 - Mesh layered car seat cushion having different hardnesses - Google Patents

Abstract

The present invention relates to a multilayer different hardness cushion used in a car seat, wherein a multiple mesh (60) having a plurality of support threads (62) between a pair of surface nets (61) is stacked in an upper portion of a foam body (10) forming a cushion main body. Therefore, the foam body (10) and the multiple mesh (60) are each applied as a hard part and a soft part. According to the present invention, air permeability and stabililty with a high degree are applied to the multilayer different hardness cushion for a car seat, thereby significantly improving comfortability and comfort of the car seat.

Description

Multi-mesh Laminated Hardness Buffer for Automobile Seats {MESH LAYERED CAR SEAT CUSHION HAVING DIFFERENT HARDNESSES}

The present invention relates to a multi-layered dual-hardness buffer used in automobile seats, a plurality of support yarns (62) on top of the foam (10) forming the buffer body, between a pair of surface layer networks (61) Multi-mesh 60 is composed of laminated, the foam 10 and the multi-mesh 60 is to act as a hard part and a soft part, respectively.

The multi-layered dual-hardness buffer is a buffer composed of foamed synthetic resin moldings having different hardness, as in the prior meaning, and is mainly applied to cushions for automobile seats. By stacking the soft portion on the upper surface of the hard portion to form, while securing the stability and durability of the shock absorber, the center portion of the upper surface of the seat where the weight is concentrated during seating is to provide comfort.

Such a multi-layered dual-hardness buffer may be produced by separately molding the hard portion of the lower layer and the soft portion of the upper layer, and then attaching the adhesive layer. Due to the nature of the foamed synthetic resin, the surface adhesion is difficult, and the hardness is different in the process of use. As both layers repeat deformation and restoration, there is a problem that the adhesive surface tissue is broken.

That is, due to the nature of the foamed synthetic resin, which is a porous material having excellent absorbency, adhesive strength may be lost as the adhesive is absorbed immediately upon application, and in order to overcome this, in the case of applying a large amount of adhesive, the foamed synthetic resin tissue absorbing a large amount of adhesive is cured and has inherent elasticity. It can be lost, even if the soft and hard layer interlayer adhesive surface of the buffer is formed, the adhesive surface and the surrounding foam synthetic resin tissue are broken in the process of repeatedly deforming both layers having different elastic modulus.

In addition, as described above, the method of molding the hard part and the soft part into separate molds causes problems of complicated process and quality control and increases production cost. In particular, a number of synthetic resin foamed products including cushions for automobile seats are used. By continuous foam molding equipment, the entire process of raw material injection, foaming, curing, and demolding is continuously performed while the mold of the machine is circulated by a conveyor and passes through a number of injection devices, ovens, and extraction devices. Since it is generally manufactured, individual fabrication and assembly methods of hard and soft parts are not applicable only by adding a mold, but are applicable by additionally adding separate continuous foam molding equipment, which inevitably requires significant facility cost.

Accordingly, Patent Publication No. 2013-27799 was developed to insert and mold a non-woven fabric for dividing the interior space of the mold up and down into the interior of the mold and then injecting the raw material for the soft part and the material for the hard part into the upper and lower spaces of the non-woven fabric, respectively. As the interlayer adhesion via a non-woven fabric proceeds simultaneously with the molding of the synthetic resin, it is possible to solve the problems associated with the above-mentioned adhesive application.

However, the following various problems have been derived in the non-woven fabric-inserted multi-layered dual-hardness buffer including Patent Publication No. 2013-27799.

First of all, it is difficult to maintain the position and shape of the non-woven fabric in the mold uniformly throughout the entire process of synthetic resin foaming, from raw material input, molding, heating, and foaming, so there is a limit to securing precision of the finished product and close interlayer adhesion. There is a problem that the defect rate is high.

In particular, during the foam molding process of synthetic resin, the liquid synthetic resin is impregnated into the nonwoven fabric and excessively hardened, or even after the completion of molding, that is, the foamed synthetic resin expands and reaches the nonwoven fabric, the foam gas between the hard and soft parts due to the characteristics of the breathable material nonwoven fabric There was a problem of frequent occurrence of defects such as partial depression or overexpansion of the molded product due to unnecessary exchange phenomenon.

In addition, since there is a need to fix the nonwoven fabric inside the mold at the correct position in the entire process of foam molding, various fixing means for fixing the nonwoven fabric, such as a support pin or a support clip, are required, and these fixing means must be embedded in a buffer body. , There was a serious problem of lowering the basic performance of the finished buffer, such as touch and elasticity.

Accordingly, the hard part and the soft part constituting the shock absorber are molded into a single mold, but the space in the mold is not divided into upper and lower parts, but divided into left and right parts to form hard parts and soft parts in both divided spaces, At the connection between the divided spaces on both sides, the foamed synthetic resin is closely mixed and connected to each other, and once the single buffer in a deployed state is formed, these single buffers are folded to finally overlap the hard portion of the lower layer and the soft portion of the upper layer. Patent No. 2015-64813 was developed to complete the multi-layered dual-hardness buffer, thereby making it possible to manufacture a multi-layered dual-hardness buffer without inserts such as adhesives applied between layers and non-woven fabrics.

However, the left and right split mold application of the Patent Publication No. 2015-64813 is applied to the Gyeonggi multi-layered buffer, which is made of a foam layer and a soft layer as well as a soft layer, and thus has a serious problem of insufficient breathability.

That is, since the foamed synthetic resin, which can not expect any breathability, is applied to the soft portion of the upper layer where the user's body is directly in contact, it was not possible to perform ventilation or ventilation through the upper portion at the time of seating, which is a user's fatigue when used for a long time. Acted as a weighting factor.

In addition, the left and right split mold application of the Patent Application Publication No. 2015-64813, a multi-layered buffer material, is used for bonding between the hard part of the lower layer and the soft part of the upper layer, and adhesives and non-woven fabrics are excluded instead of bonding protrusions and recesses. A method in which the mouth parts are mutually coupled was introduced, whereby problems such as breakage of the adhesive surface or stiffness due to non-woven fabric can be solved, but the following problems have been derived.

First, the method of utilizing the fastening between the protrusion and the indentation in the joining between the hard part and the soft part causes serious problems in terms of performing the fastening work and maintaining the fastening strength of the foam synthetic resin, which is the material of the buffer.

The foamed synthetic resin, which is a material for the cushion for the seat, has excellent elasticity and resilience, so that shock absorption, which is a natural function, can be faithfully performed, but these properties such as elasticity act as a serious disadvantage in mechanical bonding.

That is, the protrusions or recesses formed in the hard and soft parts are combined in such a way that the protrusions are inserted into the recesses by pressing the hard and soft parts in a folded state. At this time, the protrusions self-compress due to the elasticity of the material itself. As it is deformed, it may not be sufficiently inserted into the concave portion. In particular, as the external force or impact repeatedly acts during the use of the buffer body, the hard portion or soft portion may also be deformed and restored while protruding portions coupled to the concave portion may be pulled out. It is.

In view of the above-mentioned problems, the present invention provides a high degree of breathability and resilience to the soft portion of the upper layer, while maintaining the structural stability of the entire cushioning body, while forming a multi-layered dual-hardness buffer for automobile seats through a single mold. It is designed to double the comfort, and also to secure a solid connection between the upper and lower parts. In the dual-hardness buffer for automobile seats, the multi-net 60, which is the soft part of the upper layer, is closely stacked on the upper surface of the foam 10, which is a hard part of the lower layer. The buffer body is configured, but the multi-network 60 is configured by connecting a plurality of support yarns 62 to a pair of surface layer networks 61 spaced apart from each other, and one end of the multi-network 60 is formed of the foam 10. It is embedded in the front end, and the other end of the multi-network 60 is a multi-network laminated dual hardness buffer for an automobile seat, characterized in that it is fixed to the rear end of the foam 10.

In addition, at the rear end of the foam 10, a fastening hole 17 penetrating the foam 10 up and down is formed, and the fastening hole 17 is formed in a direction traversing the foam 10 in a plane. , The end of the multi-net 60 on the other side of the foam 10 is inserted and fixed in the fastening hole 17, but the end of the multi-net 60 passes through the fastening hole 17 and is exposed to the bottom of the foam 10. The multi-net laminated dual-hardness for automobile seats is also a shock absorber.

In addition, in the mold for manufacturing a multi-network laminated dual hardness buffer for an automobile seat, the mold is composed of a combined mold in which the upper mold 40 is coupled to the upper portion of the lower mold 30, and the front end and lower mold of the upper mold 40 ( Combination inserts 26 are respectively formed at the front end of 30), and multiple meshes 60 are coupled to openings formed by combining these combination inserts 26 when the upper mold 40 and the lower mold 30 are combined. It is a mold for manufacturing a multi-net laminated dual hardness buffer for automobile seats.

In addition, in the mold for manufacturing a multi-net laminated dual hardness buffer for an automobile seat, the mold is composed of a combined mold in which the upper mold 40 is coupled to the lower mold 30, and penetrates the front end wall of the upper mold 40. The upper mold insertion hole 46 is formed, and when the upper mold 40 and the lower mold 30 are combined, the multi-network 60 is coupled to the upper mold insert 46, or the lower mold insertion hole penetrates the front end of the lower mold 30 ( 36) is formed, it is a mold for manufacturing a multi-network laminated dual hardness buffer for automobile seats, characterized in that the multi-network 60 is coupled to the lower mold insert 36 when the upper mold 40 and the lower mold 30 are combined.

Through the present invention, it is possible to impart a highly breathable and resilient property to a multi-layered dual-hardness buffer for an automobile seat, thereby dramatically improving comfort and comfort of an automobile seat.

In addition, solid interlayer binding between the foam 10 of the lower layer and the multi-network 60 of the upper layer is possible, and it is possible to prevent damage to the tissue around the attachment surface, thereby improving the performance and durability of the buffer.

Particularly, in the case of interlayer bonding, any adhesion or fusion is excluded, and although dissimilar materials are compounded as a buffer, it is possible to easily separate and dispose of materials by material when disposing, so it is advantageous for recycling or reuse, and environment due to waste. The effect of preventing contamination can also be obtained.

1 is an excerpt perspective view of the present invention buffer
Figure 2 is a partially cut perspective view of the present invention buffer
Figure 3 is a perspective view of a multi-net extract of the present invention buffer
4 is a cross-sectional view of a mold for manufacturing a buffer according to the present invention
Figure 5 is an explanatory diagram of the molding method of the present invention buffer
6 is an explanatory diagram of the lamination method of the buffer of the present invention
7 is an explanatory view of the present invention buffer manufacturing method to which the hieroglyphic insert is applied
8 is an explanatory diagram of a method for manufacturing a buffer of the present invention to which a lower mold insert is applied.
9 is an explanatory diagram of a method for manufacturing a buffer body of the present invention to which a fastening hole is applied

The detailed configuration of the present invention will be described with reference to the accompanying drawings.

First, Figure 1 shows the state of use and appearance of the multi-net 60 stacked dual-hardness buffer for an automobile seat of the present invention, as shown, the buffer of the present invention is embedded in the seat of the vehicle, that is, the seat It is constituted by laminating the foam 10, which is the hard part of the lower layer, and the multi-network 60, which is the soft part of the upper layer.

In addition, a bolster 18 protruding upward is formed on the rigid foam 10 at both ends of the seat cushion to ensure boarding stability.

Figure 2 shows the detailed structure of the present invention, a hard structure of the buffer, as shown, the upper layer of the foam portion 10, a soft portion of the upper layer of the multi-layer 60, the soft portion of the upper layer is closely stacked, the buffer is configured, One end of the multi-network 60 is fixed to the front end of the foam 10, and the other end of the multi-network 60 is fixed to the rear end of the foam 10.

That is, the multi-layer 60 is stacked on the upper surface between both bolsters 18 of the lower foam 10 constituting the shock absorber to form a multi-layer structure, and the multi-network 60 forming the upper layer is shown in FIG. Likewise, a plurality of support yarns 62 are configured to be connected to a pair of surface network 61 spaced apart from each other.

The multi-network 60 applied to the present invention is not a simple network in which a network is arranged on a single plane, as in the dictionary meaning, but a multi-network that forms a considerable thickness while forming a network. As a mesh body, the multiple meshes 60 are stacked in close contact with the foam 10 on the upper surface, thereby improving the comfort through the unique elasticity and resilience of the multi-mesh 60, and also providing a comfortable basis based on the excellent breathability of the multi-mesh 60 It can provide a feeling of sitting.

As described above, in the multi-network 60, a pair of surface layer networks 61 are spaced apart from each other, and a plurality of support yarns 62 are formed between these surface layer networks 61. As in the dictionary meaning of 62), while the pair of surface networks 61 are supported by the elasticity of the support yarn 62, the space between the surface networks 61 is maintained.

As shown in FIG. 3, the plurality of support yarns 62 form a direction orthogonal to a plane formed by the surface network 61, and both ends thereof are bound or bonded to both surface network 61, respectively, and the surface network ( While forming several or more multi-rows per mesh of the mesh constituting 61, the surface network 61 is spaced apart.

Here, the support yarn 62 is not a rigid body that maintains its own hardness, and is composed of fibers having sufficient flexibility. Nevertheless, due to the dense construction of the plurality of support yarns 62, the space between the surface network 61 is separated. Can be maintained, and the resilient force is given to the multiple networks 60 of the present invention in which the surface network 61 and the support yarns 62 are combined by the elasticity of the plurality of support yarns 62 collectively expressed.

The multi-network 60 of the present invention, as shown in FIG. 3, can be knitted in a knitted form to form an organization in a manner in which the surface network 61 and the plurality of supporters 62 are bound together, After knitting one end of the support yarn 62 to one surface layer network 61 to be bound, the other surface layer network 61 may be manufactured by bonding or the like.

On the other hand, Figure 4 illustrates a mold for molding a multi-net 60 stacked dual-hardness buffer for automobile seats of the present invention, as shown in the figure, the mold of the present invention is a lower mold 30, upper mold 40 ) Is composed of a combined mold, and a combination insert 26 is formed at the front end of the upper mold 40 and the front end of the lower mold 30, respectively, as shown in FIG. 5, the upper mold 40 and the lower mold ( When the combination of 30), the multiple meshes 60 are coupled to the opening formed by combining these combination inserts 26.

That is, as shown in FIG. 5, in a state in which the multi-network 60 is coupled to the mold to be molded, the foamed synthetic resin injected into the mold is foam-molded, and simultaneously with the molding of the foam 10, one side of the multi-network 60. When the end is embedded in the foam 10, the upper mold 40 and the lower mold 30 are demolded and the molded foam 10 is taken out, a molded article in the form as in the upper part of FIG. 6 is completed.

Thereafter, by closely stacking the multi-network 60 on the upper surface of the foam 10 constituting the taken-out molded article, the dual hardness buffer as shown in FIGS. 1 and 2 is completed, as shown in the lower portion of FIG. 6, In order to securely attach the multi-network 60 to the upper surface of the foam 10, the multi-network 60 end and the foam 10 may be sewn, although not illustrated, the multi-network 60 end and the foam 10 ) Can also be provided with binding means such as hooks for mutually binding.

In the mold illustrated in FIGS. 4 and 5, the openings into which the multiple meshes 60 are inserted are formed as combination inserts 26 on the upper face of the lower mold 30 and the lower face of the upper mold 40, thereby forming a combination insert 26. As in the, the multi-network 60 is embedded in the center of the front face of the foam 10, but in addition, as the openings through which the multi-network 60 is inserted into the mold are variously formed, The buying point and the overall lamination to coating form can be controlled.

First, FIG. 7 shows that an opening into which the multi-network 60 is inserted is formed in the upper mold 40, and an upper mold inserting hole 46 penetrating the front end wall of the upper mold 40 is formed, and is shown in the lower part of the figure. As is, the multi-network 60 is embedded in the upper portion of the front of the foam (10).

That is, as shown in the center of FIG. 7, when the upper mold 40 and the lower mold 30 are combined, the multi-network 60 is coupled to the upper mold insert 46 formed only in the upper mold 40, and the upper mold 40 ) And the lower mold (30) when combined, the advantages of easy operation compared to the embodiment of Figures 4 and 5, where multiple networks (60) must be accurately inserted between both molds, but only a part of the entire surface of the foam (10) is a multiple network (60) There is a limit to this covering.

Accordingly, an opening through which the multi-network 60 is inserted may be formed in the lower mold 30 instead of the upper mold 40, and as shown in FIG. 8, the lower mold insert 36 through the front end of the lower mold 30 is formed. Therefore, when the upper mold 40 and the lower mold 30 are combined, the multi-network 60 may be coupled to the lower mold insert 36.

As shown in the lower part of FIG. 8, the multi-net 60 is inserted into the lower mold 30 to sufficiently cover the front surface of the foam 10, and in particular, the lower mold insert as illustrated in the drawing. By forming (36) on the bottom surface of the front end of the lower mold 30, the embedding part of the multi-network 60 is formed on the bottom surface of the front end of the foam 10, so that it is possible to perform a more solid embedding, as well as the front surface of the completed buffer body. Part) A soft air permeable layer can be formed on the whole, so that comfort can be maximized.

Conventional multi-layered dual-hardness buffers are mainly limited to the upper surface of the buffer body to form a soft part, and not only could not expect breathability as in the present invention, but the front end of the buffer body is mainly composed of a hard body, which is sad when seated for a long time. There was no choice but to cause passenger discomfort due to wealth pressure.

In particular, in the case of the driver's seat, the central and rear ends of the shock absorber not only secure a relatively large contact area, but mainly the buttocks are in a stationary state, so the discomfort experienced by the driver is not great, whereas the front end of the shock absorber is relatively in contact. Not only is the area small, but the shape of the contact part is also sharp, and the sensitive knee portion must be repeatedly pressed by the sharp operation of the pedal, so the driver feels uncomfortable.

Accordingly, through the present invention, the entire front part of the shock absorber is covered with a multi-network 60 excellent in flexibility, resilience and breathability as shown in FIG. 8, it is possible to maximize passenger comfort and minimize discomfort even when sitting for a long time. Can.

On the other hand, Figure 9 is a means for bundling the multi-network 60 to the foam 10, as a cut-out 17 formed to cut through the foam 10 in the rear end of the foam 10 up and down. , Foam 10 is inserted into the fastening hole 17 is fixed to the other end of the multi-net 60 on the other side of the buried portion.

Such, the fastening hole 17 is formed to be elongated in the direction of traversing the foam 10 on a plane, and as shown in the lower figure of FIG. 9, the end portion of the multi-network 60 passes through the fastening hole 17 and the foam 10 ) It is exposed to the bottom.

In addition, in forming the fastening hole 17 forming foam 10, the fastening hole forming portion 47 is formed in the upper mold 40 constituting the combined mold, as shown in FIG. 9, the fastening hole forming portion 47 Is protruding downward from the inner surface of the upper end of the upper mold 40, and when the upper mold 40 and the lower mold 30 are combined, the lower end of the fastening molded portion 47 is in close contact with the inner surface of the lower mold 30 rear end.

As a result, a fastening hole 17, which is a long hole having a width coinciding with the width of the multi-network 60, is formed in the rear end portion of the foam 10, and the fastening hole 17 has a multi-network 60. As the distal end is press-fitted, the distal end of the multi-network 60 is coupled to the fastening hole 17, so that solid binding between the rigid foam 10 and the soft multi-network 60 is possible, as well as the properties of the flexible foam synthetic resin. It is possible to build a tight fastening structure that was impossible to achieve in the prior art.

That is, rather than simply inserting the object to be joined on both sides, the end of the multi-network 60 is inserted into the fastening hole 17 that completely cuts through the foam 10 and then inserts the end of the multi-network 60. As the foam 10 passes through the fastening hole 17 and is exposed to the lower side, as shown in the lower part of FIG. 9, by pulling the exposed end of the multi-network 60, the multi-network 60 and the foam 10 This is to make the liver stronger and more solid.

In addition, through the additional processing, such as sewing the end portion of the multi-network 60 exposed to the lower side of the foam 10 and the bottom surface of the foam 10 or fastening a binding tool, the soft portion and the multi-network 60 are bonded or fused. Even without measures such as, it is possible to secure the multi-network 60, as well as the sewing line or the binding tool is not exposed to the upper side, it is possible to prevent the foreign feeling and appearance damage due to the exposure of the upper side of the buffer of these sewing line or binding tool have.

In particular, the non-adhesive to non-adhesive fixation of the multi-network 60 is also to dispose of the foam applied to the present invention, the foamed synthetic resin constituting the foam 10, and the multi-network 60, which is a heterogeneous material It can be easily and cleanly separated, which is advantageous for recycling or recycling, and can also reduce environmental pollution caused by waste.

10: foam
17: fastener
18: bolster
26: combination insert
30: lower mold
36: bottom insert
40: hieroglyph
46: hieroglyphic inlet
47: fastener forming part
60: multiple network
61: surface network
62: supporter

Claims (1)

In the car seat, the dual hardness buffer,
The upper portion of the foam portion 10, which is the hard portion of the lower layer, is stacked in close contact with the multi-net 60, which is the soft portion of the upper layer, to form a buffer body;
The multi-network 60 is formed by connecting a plurality of supporters 62 to a pair of surface network 61 spaced apart from each other;
One end of the multi-network 60 is embedded and fixed to the bottom surface of the front end of the foam 10, the other end of the multi-network 60 is fixed to the rear end of the foam 10 Multi-network stack for a car seat, characterized in that Lee Kyung-Do Buffer.

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