JP3748918B2 - Vehicle seat cover - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vehicle seat cover having a warp knitted structure having elasticity.
[0002]
[Prior art]
Conventionally, a vehicle seat is configured by a seat cover, a pad, and a frame. Among these, a seat cover 100 includes a skin material 110 such as a fabric material on the design surface side, a pad material 120 made of slab urethane foam on the inside thereof, It is comprised from the back base fabric 130 of the lowest layer.
The back base fabric 130 has a sewing machine slipping property for ensuring workability when sewing the seat cover 100, a pad slipping property for ensuring workability when the seat cover 100 is attached to the pad, In order to reinforce the seat cover 100, the back surface of the seat cover 100 is provided.
[0003]
In addition, when the seat cover 100 is manufactured by applying the back base fabric 130 to the skin material 110 and the pad material 120 in a three-layer laminated state by frame lamination or the like, new characteristics are required. become.
That is, in order to ensure the flame retardancy in the three-layer laminate state, the back base fabric 130 is required to have a strong flame retardancy.
Also, as shown in FIG. 6, when the cover material 110 is wrapped in a pad so that the skin material 110 side of the seat cover 100 is concave in a three-layer laminate state, The base fabric 130 is required to have sufficient stretchability.
[0004]
Therefore, conventionally, the flame which is knitted on the back base fabric 130 is subjected to a flame retardant treatment to ensure the flame resistance of the back base fabric 130, and the yarn is knitted with a tentacle knitting, which is a representative weft knitting structure having elasticity. Thus, the stretchability of the back base fabric 130 is to be secured.
Specifically, a flame retardant cellulosic yarn (for example, Recot # 30 or the like) or a woven fabric (for example, Recot S or the like) or a stretchy ester wooly yarn (for example, stretch ester 50d). Etc.) were used.
[0005]
[Problems to be solved by the invention]
However, as is apparent from the structure shown in FIG. 7, the weft knitting has excellent stretchability in the horizontal direction and the vertical direction, but is knitted in a cylindrical shape, so it is difficult to cope with various widths. Moreover, the knitted fabric is easily curled and the stitches are easily loosened. Furthermore, weft knitting has the disadvantages that the knitting speed is generally slow and the productivity is poor.
In addition, when the flame-retardant treated yarn is used, the stretch balance of the knitted fabric is deteriorated because the stretchability of the yarn itself is small.
Furthermore, in a woven fabric using a polyester woolly processed yarn excellent in stretchability, there are problems such as attenuation of stretchability due to the treatment of the knitted fabric with a flame retardant and variation in flame retardant treatment effect.
[0006]
On the other hand, a typical organization of the warp knitting for this weft knitting is a half knitting which is knitted by a tricot knitting machine (see FIGS. 8 and 9). This half knitting is a kind of warp knitted structure knitted into two pieces from two types of warp yarns, a front yarn and a back yarn.
As shown in FIGS. 8 and 9, the half knitting has a high knitting speed and high productivity because the loop formed by the two types of warp yarns is knitted so as to stop the other loops. In addition, by adjusting the number of warp yarns, it is possible to cope with a wide variety of widths, and it is excellent in dimensional stability in the fabric state and resistance to fraying, but the stretchability is inferior to that of a knitted sheet.
[0007]
Then, an object of this invention is to provide the vehicle seat cover of the three-layer structure which has as a back base fabric the knitted fabric which can ensure a stretching property and a flame retardance.
[0008]
[Means for Solving the Problems]
In order to solve the above technical problems, the present inventor has paid attention to imparting stretchability to the warp knitting structure itself, and has completed the present invention.
That is, the invention according to claim 1 is a vehicle seat cover formed by laminating a skin material, a pad body, and a back base fabric in three layers, and the back base fabric is made up of a front yarn and a back yarn. The warp knitting structure has a warp knitting structure knitted using different types of warp yarns, and in the same wale of the structure, the warp knitting structure alternately forms one warp yarn and another warp yarn loop. In the same course of the structure, the vehicle seat cover has a structure in which a loop of only one of one warp or another warp is formed.
[0009]
According to the second aspect of the present invention, (a) one warp yarn forms a loop, and (b) the one warp yarn forms a loop in (a) in the next course exceeding at least one course. (C) Further, the warp of the one warp is in the course corresponding to the same course interval as in (b) (a). ), The next loop is formed with the wales that formed the loop, and (d) the above processes (b) and (c) are repeated, while (e) the other warp yarns form one loop, f) In this other warp yarn, at the next course exceeding at least one course, a next one loop is formed with the adjacent wales at least one wal from the wales that formed the loop in (e), and (g) The In addition, the other warp yarn, in the course corresponding to the same course interval as in the above (f), makes a next loop with the wales in which the loop was formed in the above (e), and (h) the above (f) The vehicle seat cover according to claim 1, wherein the processes of (g) and (g) are repeated.
[0010]
The invention according to claim 3 is that in (b), one warp yarn has the next one loop in the wale adjacent to the wale that formed the loop in (a) in the next course exceeding one course. 3. In the step (f), the other warp yarns form one loop in the next course beyond the first course by one of the wales that formed the loop in the step (e). It is a vehicle seat cover as described in above.
[0012]
Hereinafter, the present invention will be described in detail.
The warp knitting structure of the present invention is a kind of knitted fabric structure and is a two-sheet structure.
Here, the vertical knitted fabric is formed by entangled loops in the vertical direction, and its basic structure is a denby knitting using an open stitch and a closed stitch.
[0013]
The front yarn and the back yarn are yarns for forming the two-sheet lengths constituting the structure of the present invention.
The course is a knitted loop and is a loop along the loop forming direction. The wale refers to a loop along a direction perpendicular to this course.
[0014]
In (b) of claim 2, one loop formed by one warp yarn in the adjacent wales is formed in the next course that is one course away from the original course, that is, in the second course from the original course. It is preferable.
On the other hand, in (f), it is preferable that one loop formed by the next wales in which the other warp yarn is at least one wal is formed in the second course from the original course.
[0015]
In this way, when each warp yarn does not form a loop for each course, but at least every other course, a loop of one warp yarn and another warp yarn is alternately formed in the same wale. It will be.
[0016]
Further, the wale intervals for forming the respective loops of one warp yarn and the other warp yarn can be variously set according to the stretchability and rigidity required for the back base fabric. Therefore, the wale interval between one warp and the other warp may be the same or different.
However, it is preferable that one warp yarn is alternately formed with a loop between adjacent wales, and the other warp yarn is alternately formed with a loop between the next wal.
[0017]
Note that the loop of one warp and the other warp may be either open or closed. However, when the loop is open, the knitted fabric tends to become loose, and for this reason, the knitting speed cannot be increased. Therefore, a closed loop is preferable from the viewpoint of productivity and stabilization of the knitted fabric.
[0018]
[Action]
In the first to third aspects of the invention, in the two warp knitted fabric, the loops of one warp and the other warp do not overlap. Therefore, the loops do not restrain each other's yarn. In addition, since a knitted fabric is used, the productivity is high and the width of the knitted fabric is large. In addition, by making the back base fabric, the skin material, the pad material and the three-layer laminated state, when making the skin material side concave, the back base fabric on the outer peripheral side causes wrinkles on the skin material side. Is sufficiently stretched so as not to cause a stress.
[0019]
In the invention described in claim 2, loops are alternately formed between adjacent wales by one warp, and loops are alternately formed by one warp between the next wales. Two types of warp yarns form loops at different wale intervals.
[0020]
In the invention according to claim 3, a loop is alternately formed between adjacent wales by one warp by one warp, and between the next wales by which one wal is placed every other course by another warp. Alternating loops are formed. Two kinds of warp yarns form loops with the same course interval and different wale intervals so that the loops do not overlap with each other, and the loops are formed.
[0022]
【The invention's effect】
According to the vehicle seat of the first to third aspects, sufficient stretchability in the longitudinal direction and the transverse direction can be ensured regardless of the stretchability of the yarn itself of the warp knitted structure. Therefore, it is possible to select a yarn that can impart other characteristics required for the knitted fabric, and it is possible to easily achieve the characteristics required for the knitted fabric. Moreover, since it is a knitted fabric, it is highly productive and the flexibility in selecting the width and yarn is improved. In addition, since the structure of the backing fabric is stretchable, when a force that stretches the backing fabric is applied, the backing fabric is stretched with low stress and can be prevented from generating wrinkles or the like on the skin material side. . Moreover, the stretchability of the backing fabric can be ensured without depending on the stretchability of the yarn itself. For this reason, if the back base fabric is knitted with the flame-retardant treated yarn, flame retardancy can be imparted to the vehicle seat cover.
[0024]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
Example 1
FIG. 1 shows an enlarged view of a warp knitted fabric 2 of this embodiment.
This knitted fabric 2 is made of nylon 20d (denier), which is a polyamide-based resin yarn, and is divided into two sheets by two rows of knitting needles from a front yarn F and a back yarn B which are two sets of warp yarns using a tricot knitting machine. It is organized.
The denier referred to in this example is a unit used to represent the thickness of a filament or fiber such as a synthetic fiber, and is represented by the weight (g) of a fiber having a length of 9000 meters. It is calculated by the following formula.
Denier (d) = Fiber weight (kg) / Fiber length (km) x 9000
[0025]
The knitting method of the knitted fabric will be described based on the organization chart of FIG.
First, when the front yarn F forms one loop at the positions of the course B and the wale g, in the next course C, the front yarn F does not form a loop. The front yarn F is guided so that the loop formed in the course B forms a closed line, and in the course D of the second course, the next loop is formed with the second wale e in the left direction in FIG. To do.
[0026]
Further, in the next course E, the front yarn F does not form a loop as in the previous case, but is guided so as to form a closed line, and in the course F, the original wale that has formed the first loop. Returning to g, a third loop is formed.
In this way, the front yarn F forms loops (closed stitches) one after another for every course and every wal, and one of the two sheets is knitted.
In forming each loop, the front yarn F is hooked on the loop of the back yarn B.
[0027]
Next, when the back yarn B forms one loop in the course A and the wale b, no loop is formed in the next course B. Then, the back yarn B is guided so that the loop formed in the course A forms a closed line, and in the course C, the next loop is formed in the left adjacent wale a.
[0028]
Further, in the next course D, this back yarn B does not form a loop in the same manner as before, and the loop formed in the course C is guided so as to be closed, and in the course E, the first loop is passed. Returning to the original wale b, the third loop is formed.
In this way, the back yarn B is formed one course at a time, and loops (closed eyes) are formed one after another between the wales, and one of the two sheets is knitted.
[0029]
In this way, when the front yarn F and the back yarn B are knitted, only a loop formed by one of the yarns F and B exists in each course. That is, each course has only a loop of either the front yarn F or the back yarn B.
In each wal, a loop of the front yarn F and the back yarn B exists alternately.
[0030]
In the knitting of the knitted fabric 2, as shown in FIG. 1, since the two yarns of the front yarn (F) and the back yarn (B) do not overlap each other, a loop is formed separately. The two yarns F and B do not interfere with each other. Therefore, it is stretched with a low stress with respect to the tensile force applied to the knitted fabric 2, and as a result, good followability as well as good stretchability is achieved.
[0031]
Further, in the knitted fabric 2, the front yarn F and the back yarn B are each formed with a loop in every other course in the warp direction. Therefore, a higher degree of freedom can be given to each of the yarns F and B, and more stretchability can be imparted in the warp direction and the weft direction.
[0032]
FIG. 3 shows the results of measuring the stress generated in the knitted fabric 2 when the knitted fabric 2 thus formed is stretched by 20% in various directions.
In this figure, as a comparative example, nylon tricot 20d (half knitted fabric of nylon 20d (warp knitted fabric)), racott S (recott knitted fabric of # 30 (weft knitted fabric))), stretch ester 50d (wooly ester 50D) The results of stress measurement of No. 10 (knitting fabric) are also shown.
[0033]
As is apparent from FIG. 3, it was clear that the knitted fabric of this example had good stretchability in both the warp / weft direction and the forward / reverse bias direction.
That is, the knitted fabric 2 of this example had a stretchability similar to that of the stretch ester 50d having excellent stretchability as well as a remarkable stress reduction compared to a half knitted fabric using the same nylon 20d. . Further, even when compared with Recot S, it had good stretchability and stretch balance. Therefore, it is clear that even if nylon 20d, which is a standard yarn for stretchability, is used, sufficient stretchability can be obtained by knitting the knitted fabric.
[0034]
(Example 2)
Next, Example 2 will be described. In Example 2, the same knitting as in Example 1 was used, and the yarn used was two sets of polyester / rayon blend yarn 40 and cotton yarn 40 (spun yarn). This yarn is blended with rayon, which is a cellulosic yarn that exhibits a flame retardant effect by carbonization during combustion.
In addition, the count in this embodiment means an English count, and is a unit that represents the thickness of the yarn by how many times the length of one pound (about 450 g) is 840 yards (about 750 meters). It is calculated by the following calculation formula.
Count = Thread length (km) / Thread weight (kg) x 1000 x 0.4539 / (840 x 0.91438)
[0035]
For the knitted fabric of this example, a three-layer laminate structure is formed by frame lamination in combination with various skins a to f, and the results of testing for flame retardancy in the laminated state are shown in FIG. Further, as a control, the same test was performed using the Recot S and the Nylon Tricot 20d used in Example 1.
The various skins a to f are as follows, and a polyether slab urethane foam (thickness 5 mm, density 0.02 kg / m ³ ) was used as the pad material. Further, the flame retardancy test was conducted according to FMVSS302 (American Automobile Safety Standard).
Types of epidermis
a Warp knitted fabric b Warp knitted fabric c Warp knitted fabric d Woven fabric e Woven fabric f Woven fabric [0036]
As is clear from FIG. 4, the knitted fabric of Example 2 stably had a burning rate of around 6 cm / min as compared with the control example. This is due to the fact that the knitted fabric has high flame retardance and is stable because the blended rayon is carbonized during combustion and exhibits a flame retardant effect. On the other hand, since the nylon 20d of the control example has low flame retardancy, it easily affects the flame retardancy of other laminate materials, and as a result, the burning rate varies in the laminated state. In addition, since the leycott S is subjected to a flame retardant treatment on the yarn itself, it is considered that the flame retardant variation occurs, and as a result, the laminate burning rate varies.
[0037]
Therefore, by forming the three-layer laminated vehicle seat cover using the knitted fabric of this embodiment as the backing base fabric, a stable burning rate can be obtained regardless of the type of the skin material or the like. Further, by controlling the flame retardance of the back base fabric, the flame retardance can be easily and reliably imparted to the vehicle seat cover.
[0038]
In addition, when the knitted fabric of this example was tested for the same elongation characteristics as in Example 1, it was confirmed that it had the same elongation characteristics as in Example 1.
That is, the vertical direction was 1.58 N / 25 mm, the lateral direction was 0.29 N / 25 mm, the forward bias direction was 0.91 N / 25 mm, and the reverse bias direction was 0.87 N / 25 mm.
[0039]
Further, as is apparent from the present embodiment, by applying the knitted fabric structure of the present invention to the backing base fabric of the vehicle seat cover three-layer laminate structure, elasticity can be imparted regardless of the yarn quality, As a result, application of the flame retardant yarn to the back base fabric can be easily achieved. Therefore, according to the knitted fabric structure of the present invention, it is possible to standardize the back base fabric material that has been diversified due to the various back base fabric characteristics currently required for the vehicle seat cover three-layer laminate structure.
[Brief description of the drawings]
FIG. 1 is an enlarged view of a knitted fabric according to an embodiment.
FIG. 2 is an organization chart of a knitted fabric according to an example.
FIG. 3 is a diagram showing shrinkage stress applied in each direction when the knitted fabric of Example 1 is stretched by 20% in each direction.
4 is a graph showing the test results of the burning rate of a vehicle seat cover having a three-layer laminate structure in which the knitted fabric of Example 2 is used as a backing base fabric. FIG.
FIG. 5 is a view showing a vehicle seat cover.
FIG. 6 is a view showing a state in which wrinkles are generated in the skin material in the vehicle seat cover in a three-layer laminated state.
FIG. 7 is an enlarged view of a weft knitted fabric.
FIG. 8 is an enlarged view of a warp knitted fabric (half knitting).
FIG. 9 is an organization chart of a warp knitted fabric (half knitting).

Claims (3)

A vehicle seat cover obtained by laminating a skin material, a pad body, and a back base fabric in three layers,
This back base fabric has a warp knitted structure that is knitted using two types of warp yarns , a front yarn and a back yarn ,
The warp knitting structure is formed by alternately forming one warp yarn and another warp yarn loop in the same wale of the structure, and either one warp yarn or the other warp yarn in the same course of the structure. A vehicle seat cover characterized by having a structure in which only a loop is formed . The warp knitting structure is as follows: (a) one warp yarn forms one loop; (b) this one warp yarn forms a loop in (a) in the next course exceeding at least one course. A next loop is formed at a wale at least next to or further away from the wale. (C) Further, the one warp is formed in the course corresponding to the same course interval as (b). (D) The above processes (b) and (c) are repeated, while (e) the other warp yarns form one loop, and (f) ) In this other warp, at the next course beyond at least one course, make the next one loop with the neighboring wales that are at least one wal away from the wales that formed the loop in (e), and (g) In addition, the other warp yarn, in the course corresponding to the same course interval as in the above (f), makes a next loop with the wales in which the loop was formed in the above (e), and (h) the above (f) The vehicle seat cover according to claim 1, wherein the processes of (a) and (g) are repeated . In (b), one warp yarn forms the next loop in the wales adjacent to the wales that formed the loops in (a) in the next course exceeding one course, and in (f) the other 3. The vehicle seat cover according to claim 2 , wherein in the next course that exceeds one course, the warp yarn forms one loop with a wal that is adjacent to the wal that formed the loop in the step (e) .

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