JP5513329B2 - Fray prevention cloth spring material - Google Patents

Description

  The present invention relates to a cloth spring material used as a cushioning material for seat seats of automobiles, railway vehicles, airplanes, child seats, strollers, wheelchairs, furniture, office chairs and the like.

  By stretching a woven or knitted fabric made of elastic fibers such as polyester-based elastomer fibers or polytrimethylene terephthalate fibers on the frame, it is possible to develop cushioning properties by taking advantage of the stretch recovery of the elastic fibers. A seat having features such as thinness, light weight, and high air permeability can be obtained as compared with the urethane cushion material. A woven or knitted fabric made of such elastic fibers is called a cloth spring and is being used for many seating applications such as office chairs and furniture.

  Patent Document 1 discloses a knitted fabric in which the ground structure is composed of a chain knitting and a 3 to 8 needle swing tricot knitting, and an insertion yarn is inserted into a warp. The knitted fabric has a high tear resistance and is fit to the human body. A cloth spring material that is excellent in stretch recovery and has good stretch recovery properties is disclosed. However, the cloth spring material of Patent Document 1 cannot be used in an uncut state because the chain stitch of the ground texture is likely to fray at the end after cutting. Although a method for preventing fraying of the end portion by sewing is required, there has been a problem that the knitting structure of the end portion is fixed by sewing and the performance of the cloth spring material is lowered.

JP 2006-97170 A

  The object of the present invention is to solve the above-mentioned problems, to prevent the spread of fraying from the cut end of the cloth spring material made of warp knitted fabric, and to inhibit physical properties such as elongation characteristics and seam strength by sewing. It is an object of the present invention to provide a cloth spring material that prevents fraying of stitches by sewing.

The inventor has found that the conventional problems can be solved by setting the knitting density of the ground structure and the ratio of the stitch pitch and the stitch pitch of the sewing to a special range, and has completed the present invention. It was.
That is, the present invention is as follows.
(1) A cloth spring material in which a sewing thread is sewn into at least a part of the periphery of a cut portion of a warp knitted fabric having a product of the number of courses of a ground structure and the number of wales of 100 to 600, The size A is 0.7 to 1.8 mm, and the ratio (C / B) of the stitch pitch B (mm) in the course row direction to the stitch pitch C (mm) in the substantially course row direction is 1.0 to A cloth spring material that is 4.0 and has a sewing thread penetrating a stitch at at least one place per five stitches of sewing thread that are sewn in a substantially course row direction.
(2) The cloth spring material according to (1) above, wherein the ground structure is composed of a knit loop structure having at least two ridges, and at least one ridge is a chain knitting or a single stitch tricot knitting. .

  According to the present invention, the cutting end portion of the fabric spring material made of warp knitted fabric does not require complicated processing, the spread of fraying from the end portion can be prevented by specific sewing processing, and elongation characteristics and A cloth spring material can be provided in which physical properties such as seam strength are not hindered.

Hereinafter, the present invention will be described in detail.
The cloth spring material of the present invention is a sheet-like cushion material formed by stretching the cloth spring material on various frame shapes such as a substantially rectangular shape and a polygon shape by various methods such as sewing, resin molding, and bolting. It is formed, and the cushioning property when a person sits down is expressed by utilizing the stretch characteristic of the cloth spring material.

A cushion material can be formed only with a frame and a cloth spring material. If necessary, a fibrous cushioning material such as three-dimensional knitted fabric, hard cotton, and nonwoven fabric, urethane, and a skin material are laminated on the cloth spring material. It can be used as a cushion material.
In the cloth spring material of the present invention, it is preferable that a sewing thread is sewn around the cutting portion in order to prevent fraying from the cutting portion. As a method for sewing the sewing thread, any method such as main stitching, staggered stitching, and overlock stitching can be used. However, as a simpler method, the main sewing is preferable. The cut portion of the cloth spring material may be folded back and the sewing thread may be sewn, but a method of sewing the periphery of the cut portion without folding back is simpler and preferable.

The periphery of the cut portion of the cloth spring material is the inside of the outer periphery where the cloth spring material is cut, the periphery of the notch or hole provided in the cloth spring material, the end of the cloth spring material and the cloth spring material, other fabrics, The part etc. which join members, such as resin, by sewing are shown. The distance from the cut portion to the sewing thread is preferably 2.5 to 12 mm, more preferably 3 to 12 mm, and still more preferably 4 to 10 mm.
In particular, in the joint portion formed by sewing the cloth spring material and the cloth spring material or other members, the configuration of the present invention can prevent fraying from the end portion of the joint portion. This is preferable because the seam strength can be improved without impairing the elongation characteristics of the material.

  In the present invention, since the sewing thread penetrates the stitch portion and sinker loop portion of the ground texture, the stitch of the ground texture is prevented from gradually unraveling and fraying from the knitting end direction. For this purpose, it is preferable that the product of the number of courses indicating the density of the ground texture of the cloth spring material and the number of wales is 100 to 600. When the product of the number of courses and the number of wales is less than 100, the ratio of the sewing thread penetrating the stitches extremely decreases and the stitches are not fixed by the stitching threads, so that it becomes difficult to prevent fraying. When the product of the number of courses and the number of wales exceeds 600, fraying prevention by sewing is improved, but the ground yarn breakage that the ground yarn forming the ground texture is cut by the impact or friction of the sewing needle or thread. Is likely to occur, leading to a decrease in strength of the cloth spring material. The product of the more preferable number of courses and the number of wales of the cloth spring material for preventing fraying of the cloth spring material is 150 to 450, and more preferably 170 to 400. The number of courses here refers to the number of stitches existing in a length of 2.54 cm in the vertical direction (the direction of the wale row) of the ground structure, and the number of wales is 2.54 cm in the width direction (the direction of the course row). The number of stitches existing in the length of.

  In the present invention, it has been found that fraying can be effectively prevented by allowing the sewing thread to penetrate the stitches of the ground texture at a specific ratio. That the sewing thread penetrates the stitch means that the sewing thread penetrates at least one fiber portion of the stitch or the center opening portion of the stitch in the ground structure. Usually, when sewing warp knitted fabrics, there is a possibility that the sewing thread may penetrate the stitch part, the space part between the stitches and the stitch part, or the sinker loop part. It was not considered to take the sewing conditions to take. In the present invention, fraying is always prevented by penetrating the stitch portion at a specific ratio.

  The cloth spring material of the present invention preferably has a stitch size A of the ground texture of 0.7 to 1.8 mm. The size of the stitch of the ground texture indicates the length (mm) in the course row direction (= knitting width direction) of one stitch when the ground texture is viewed from the knit loop side. When the size A of the stitch is less than 0.7 mm, the ratio of the sewing thread penetrating the stitch is greatly reduced, and the stitch is not fixed by the sewing thread, so that it is difficult to prevent fraying. Also, if the stitch size A exceeds 1.8 mm, the ratio of the sewing thread penetrating the stitch is improved and the fraying prevention performance is improved, but the stitch is easily deformed and the stretch recovery property is greatly reduced, and the cloth spring material The performance of will be insufficient. A more preferable range of the size A of the stitch is 0.7 to 1.5 mm, and a more preferable range is 0.8 to 1.2 mm.

  In the cloth spring material of the present invention, the ratio (C / B) between the stitch pitch B (mm) in the course row direction of the ground structure and the stitch pitch C (mm) in the substantially course row direction is 1.0 to 4. 0 is preferred. When C / B exceeds 4.0, the ratio of the sewing thread penetrating the stitches decreases, making it difficult to prevent fraying and greatly reducing the stitch strength. Further, since the ratio of the sewing thread becoming linear becomes high, the elongation of the sewing spring does not follow the elongation ratio of the cloth spring material, and the elongation characteristics of the sewing portion are hindered. Further, when C / B is less than 1.0, the fraying prevention property is improved, but the stretch characteristics of the cloth spring material are hindered because the sewing thread restricts the stitches too much. Moreover, the ground yarn breakage of the ground structure is likely to occur, leading to a decrease in strength of the cloth spring material itself. The more preferable range of (C / B) is 1.3 to 3.8, and more preferably 1.6 to 3.1.

  The stitch pitch B here is the distance between the centers of adjacent stitches in the course row, and the stitch pitch C indicates the stitch length of one stitch, and is a needle formed when forming one stitch. Indicates the distance from the hole (center) to the next needle hole (center). A preferable range of the stitch pitch B is 1.2 to 2.5 mm, and a preferable range of the stitch pitch C is 2.0 to 5.5 mm.

  The position, direction, sewing length, etc. when sewing the sewing thread into the fabric spring material can be set as desired, but the sewing thread should be sewn at least in the direction of the course of the ground structure around the cut portion of the fabric spring material. Thus, it is possible to prevent the stitches from being unwound from the direction of the knitting end of the ground structure, which is an effective fraying countermeasure. The shape in which the sewing thread is sewn in the substantially course row direction may be linear or arcuate, and at least a part of the stitches may be oriented in the substantially course row direction.

  In the cloth spring material of the present invention, it is preferable that the sewing thread penetrates the stitch at at least one place per five stitches of the sewing thread in a substantially course row direction. When the sewing thread penetrates the stitch, fraying of the penetrated stitch is completely blocked. The ratio of the sewing thread that penetrates the stitches is more preferably at least one of four stitches, and more preferably at least one of three stitches.

  The cloth spring material of the present invention is preferably composed of a ground structure composed of at least two knit loop structures in order to improve the breaking strength, tear strength, and seam strength of the cloth spring material. The knit loop structure refers to a knitted structure that forms a knit loop in all courses, such as chain knitting and tricot knitting. It is preferable that at least one wrinkle of the ground texture composed of at least two knit loops is a chain knitting or a one-needle swing tricot knitting. By using the chain knitting or the one-needle swing tricot knitting, it is possible to suppress the elongation in the vertical direction of the ground structure and to reduce the residual strain after the cloth spring material is stretched. The chain knitting is particularly preferable for suppressing the elongation. Further, in order to moderately suppress the horizontal extension of the cloth spring material, to reduce the residual strain after the cloth spring material is stretched, and to further improve the tear strength of the cloth spring material, at least one sheet of paper must be shaken with multiple needles. A tricot knitting is preferable, and the swing width of the multi-needle swing is preferably 3 to 8 swings. Therefore, in order to suppress the residual strain after stretching and improve the tear strength, at least one of the ridges of the ground texture is a chain knitting or one-needle tricot knitting, and the other ridge is a multi-needle wing tricot knitting. More preferably.

  In the knitting structure of the cloth spring material of the present invention, the insertion yarn can be knitted in the vertical direction and / or the horizontal direction in order to improve the recoverability after elongation and at the same time increase the surface rigidity and improve the posture support of the human body. preferable. When the insertion yarn is knitted in the warp direction, it is inserted between the needle loop and the sinker loop of the ground yarn knitted with a structure such as chain knitting or tricot knitting with a swing width of 3 stitches or less per course, or warp It is preferable that the insertion yarn is inserted in a straight line shape or a zigzag shape over the entire length of the three-dimensional knitted fabric while being inserted between the sinker loops of the ground yarn continuous in the length direction of the knitted fabric. When the insertion yarn is knitted in the horizontal direction, the shape of the insertion yarn is close to a straight line across the entire width of the warp knitted fabric between the needle loop and the sinker loop of the ground yarn knitted with a structure such as chain stitch or tricot knitting. Is preferably inserted.

  As for the method of knitting the insertion yarn, it can be inserted by a knitting structure as long as it is inserted in the vertical direction. At this time, in order to suppress the deformation (texture deformation) of the stitch, It is preferable to insert in a different direction. The swing width is preferably less than or equal to 3 stitches per course, more preferably 2 or 1 stitches than 3 stitches. In the case of insertion in the horizontal direction, weft insertion can be performed using a Russell knitting machine equipped with a weft insertion device.

  Arbitrary fibers can be used as the fibers constituting the ground structure of the cloth spring material of the present invention. However, in order to increase the strength of the cloth spring material, synthetic fibers such as polyester fibers and polyamide fibers are used. It is preferable. In addition, the insertion yarn used to suppress the deformation (texture deformation) of the stitch of the ground texture can be any fiber such as polyester fiber or polyamide fiber, but it improves the stretch recovery of the cloth spring material. In order to reduce residual strain after a person sits for a long period of time, it is preferable to use an elastic fiber such as polytrimethylene terephthalate fiber or polyester elastomer fiber. Furthermore, it is preferable to use a 300-3000 dtex monofilament as the insertion yarn in order to increase the rigidity of the ground tissue and suppress the tissue deformation. When the monofilament is used as an insertion thread, the monofilament may be bonded to the ground tissue in order to prevent the monofilament from slipping and causing tissue deformation or plastic deformation after sitting. Adhesion can be achieved by using a sheath-core monofilament with a monofilament surface covered with a low-melting polymer, knitting the fabric and then heat-sealing it with a heat set, etc. A method of thermally fusing the monofilament and the like is preferable.

  Although the thing of arbitrary fineness can be used for the fiber used for the ground structure of the cloth spring material of this invention, it is preferable to use the fineness of 150-1000 dtex. More preferably, it is 160-700 dtex, More preferably, it is 250-600 dtex.

  The fabric spring material of the present invention is a fabric spring, after finishing a living machine through processes such as scouring, dyeing, heat setting, etc., and then cutting into a desired shape and size, and sewing a sewing thread at least at a part around the cut portion. It is obtained by joining materials together with other members by sewing. As long as the object of the present invention is not impaired during the finishing process, finishing processes such as resin processing, antistatic processing, antibacterial processing, water repellent processing, and flame retardant processing, which are usually used for fiber processing, may be applied. In particular, it is preferable to perform a finishing process that further improves the fraying prevention property of the ground texture by resin processing such as polyurethane, vinyl chloride, acrylic, silicone, fluorine, chloroprene.

The warp knitted fabric used for the cloth spring material of the present invention can be knitted as a single knitted fabric by a single raschel knitting machine, or may be knitted as a two-layer knitted fabric by a double raschel knitting machine. The gauge of the knitting machine is preferably 12 gauge to 22 gauge.
Although the basis weight of the warp knitted fabric used for the fabric spring member can be arbitrarily set depending on the purpose, preferably 200 to 1000 g / m ^2, more preferably a 250~800g / m ^2.

The obtained cloth spring material is processed for joining to a frame such as a seat, if necessary, and used for a tension type seat.
The state in which the cloth spring material is stretched on the seat frame is not limited, and the cloth spring material is stretched by tensioning or slackening the outer periphery or at least two sides of the cloth spring material on the back or the seat frame. A seat in which the material forms a seat and a back is obtained.

  Any method can be used for fixing the cloth spring material to the frame. For example, as described in JP-A-2002-219985, a plate member having a groove portion with a substantially U-shaped cross section is fixed to the end portion of the knitted fabric, and the groove portion of the plate member is engaged with an appropriate frame material. Method, after processing the end of the cloth spring material by welding, sewing, resin processing, etc., then pressing the end with a pressing member etc. and fixing it to the frame with bolts etc., inside the cavity where the end is folded and sewn An arbitrary method such as a method of passing a metal rod through and fixing the metal rod to the frame, or an integral molding with a resin frame can be used. In addition, by using a method of fixing the cloth spring material of the present invention to the frame via a metal spring such as a coil spring or a torsion bar, cushioning properties with a more stroke feeling can be imparted.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. In addition, evaluation and measurement of each characteristic in an example were performed by the following method.
(1) Elongation followability, seam strength, fraying prevention property Two 100 mm x 100 mm samples were taken from the fabric fabric for the spring material, the sinker loop surfaces of the two samples faced each other, and the knitting direction was reversed 180 degrees. # 8 polyester in the course row direction (knitting width direction) with an interval of 3 mm from the end of one sample in the knitting end direction (end of the other sample in the knitting start direction). Perform the main sewing with the sewing thread. At this time, the main stitch is performed with the stitch pitch set to 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, and 6 mm. At this time, the number of stitches that the sewing thread penetrates the stitches is counted and converted to the number of penetrations per five stitches.
At this time, both ends of the sewn portion are grasped with both hands and pulled in the knitting width direction, and the stretch followability of the sewn portion with respect to the stretch characteristics of the base fabric is evaluated by sensory evaluation, ◎: Very good stretch followability, ○: Stretch followability Is relatively good, Δ: stretchability is slightly inferior, x: elongation followability is considerably inferior.

Furthermore, using Shimadzu Autograph AG-B type (manufactured by Shimadzu Corporation), the both ends of the two stacked samples were opened at a gripping distance of 10 cm, fixed to the chuck, pulled and sewn at a pulling speed of 200 mm / min. Measure the seam strength when the eye breaks. The measurement is performed three times and the average value is calculated.
In addition, the state in which fraying from the end in the knitting end direction propagated to the center of the sample was visually evaluated, ◎: no fraying, ○: little fraying, Δ: slight fraying, x: Relative evaluation is made in four stages, with many large fraying.

(2) Fraying prevention and recovery in a stretched seat A seat frame (without backrest) made of a mouth-shaped metal pipe material with a seat portion of 52 cm in width, 47 cm in depth and 32 cm in height is produced. From the finished warp knitted fabric, a 50 cm × 57 cm rectangle of 50 cm in the wale row direction (length direction) and 57 cm in the course row direction (knitting width direction) is cut out, and the entire circumference is # 4 at a distance of 4 mm from the cut end. A cloth spring material was obtained by sewing with a sewing thread of polyester thread at a stitch pitch of 3 mm. Further, a substantially U-shaped plate made of polybutylene terephthalate resin is attached by sewing to the entire width of 50 cm sides (two places). The seat is in a state where one substantially U-shaped plate of the cloth spring material is engaged with a metal substantially U-shaped plate attached under the front edge of the seat frame and a tension of 10 kg is applied to the entire 50 cm width of the cloth spring material. A cloth spring material is stretched before and after the frame, and the cloth spring material is stretched by meshing with a metal substantially U-shaped plate below the rear edge of the seat frame and a resin substantially U-shaped plate of the cloth spring material. When the positions of the metal substantially U-shaped plate and the resin substantially U-shaped plate are shifted due to the tension of 10 kg, the position where the metal resin substantially U-shaped plate is bolted is shifted and adjusted. Matching the direction of the 57 cm side of the cloth spring material with the direction of the knee, a man with a weight of 65 kg sitting on the seat for 2 minutes and then leaving the seat for 1 minute is repeated 5 times.

  The state in which the fray from the edge of the cloth spring material after leaving the seat passed through the seam portion and propagated to the body cloth portion was visually evaluated. ◎: No fraying, ○: No fraying, △: Small Evaluation is made in 4 stages, with some fraying, x: many fraying. Further, the state of recovery of the cloth spring material was visually evaluated, and ：: completely recovered. ○: Almost recovered. Δ: Slight indentation (deformation) remains. X: Relative evaluation is performed in four stages, in which large depressions remain.

(3) Number of stitches penetrated per 5 stitches In a sample in which two 100 mm × 100 mm samples prepared in (1) above were overlapped and the end was sewn, the number of stitches (S) and the stitching thread were stitched. The number of penetrating holes (T) is counted, and the stitch penetration number per 5 stitches is calculated from the following equation.
Number of stitch penetrations per 5 stitches = T × 5 / S

[Example 1]
Using a 14-gauge Russell knitting machine equipped with four reeds, 560 decitex / 96-filament polyethylene terephthalate fibers are fed in an all-in array from the reeds (L1, L2) forming the ground structure, and inserted yarns A monofilament of 880 dtex polytrimethylene terephthalate fiber was supplied in an all-in arrangement from the cocoon (L3).

A fabric spring material knitting machine was knitted with the density of the on-machine course 14.0 course / 2.54 cm in the knitting structure shown below. The raw machine thus obtained had a width and was dry heat set at 170 ° C. for 3 minutes to obtain a cloth spring material base fabric.
(Knitting organization)
L1: 20/02 / (all-in)
L2: 20/1012 / (all-in)
L3: 44/00 / (all in)

A 50 cm × 57 cm rectangle of 50 cm in the wale row direction and 57 cm in the course row direction is cut out from the obtained fabric spring material base fabric, and the entire circumference is cut at a distance of 4 mm from the cut end with a # 8 polyester yarn sewing thread. A fabric spring material in which fraying from the cut end portion was prevented by performing main sewing at a stitch pitch of 3 mm, and a tensioned seat was manufactured as a prototype. Further, a sample for evaluating elongation followability, seam strength, and fraying prevention properties from a base fabric for a cloth spring material was produced at a seam pitch of 3 mm and evaluated. The obtained results are shown in Table 1 together with various characteristics of the cloth spring material.
The obtained fabric spring material had high elongation followability at the sewing portion, seam strength, and fraying prevention properties, and there was no breakage of the ground yarn during sewing. Also, there was no fraying in the tension seats and the recovery was excellent.

[Example 2]
In Example 1, the fiber supplied to the ridges (L1, L2) forming the ground texture was changed to a raw yarn of polyethylene terephthalate fiber of 280 dtex / 48 filaments, and the onboard course was 18.0 course / 2.54 cm. A cloth spring material base fabric was obtained in the same manner as in Example 1 except that. A fabric spring material in which fraying of 50 cm × 57 cm was prevented was obtained from the obtained base fabric for fabric spring material in the same manner as in Example 1, and a tension seat was produced as a prototype. Further, a sample for evaluating elongation followability, seam strength, and fraying prevention properties from a base fabric for a cloth spring material was produced at a seam pitch of 3 mm and evaluated. The obtained results are shown in Table 1 together with various characteristics of the cloth spring material.
The obtained fabric spring material had high elongation followability at the sewing portion, seam strength, and fraying prevention properties, and there was no breakage of the ground yarn during sewing. Also, there was no fraying in the tension seats and the recovery was excellent.

[Examples 3 to 5 and Comparative Examples 1 and 2]
In Example 1, the stitch pitch when the periphery of a 50 cm × 57 cm rectangle is sewn, and the stitch pitch for sewing a sample for evaluating elongation followability, stitch strength, fraying prevention property is 1.5 mm, The cloth spring material obtained in the same manner as in Example 1 was evaluated except that the thickness was 2 mm, 4 mm, 5 mm, and 6 mm. The obtained results are shown in Table 1 together with various characteristics of the cloth spring material.
When the stitch pitch was 1.5 mm and C / B was 0.9, the stretchable followability of the sewn portion was poor, and some ground thread breakage (single thread breakage) was observed. In addition, when the stitch pitch is 6 mm, the number of stitches per 5 stitches is as low as 0.8, the fraying prevention property is poor, the stitch strength is low, and the elongation followability is also quite inferior. It was.

[Examples 6 to 8 and Comparative Examples 3 and 4]
In Example 2, the stitch pitch when the periphery of the 50 cm × 57 cm rectangle is sewn, and the stitch pitch for sewing the sample for evaluating the stretch following property, the stitch strength, and the fraying prevention property is 1.5 mm, The cloth spring material obtained in the same manner as in Example 2 was evaluated except that the thickness was 2 mm, 4 mm, 5 mm, and 6 mm. The obtained results are shown in Table 1 together with various characteristics of the cloth spring material.
When the stitch pitch is 5 mm and 6 mm, the number of stitches per stitch is as low as 0.7 and 0.3, and the fraying prevention property is poor, the stitch strength is low, and the elongation followability is also poor. It was a thing.

[Comparative Example 5]
Using a 24-gauge Russell knitting machine equipped with four reeds, 167 decitex / 48-filament polyethylene terephthalate fibers are fed in an all-in arrangement from the reeds (L1, L2) forming the ground structure, and inserted yarns Monofilaments of polytrimethylene terephthalate fibers of 390 dtex were supplied in an all-in arrangement from the cocoons (L3).

A fabric spring material knitting machine was knitted with the density of the on-machine course 24.0 course / 2.54 cm in the knitting structure shown below. The raw machine thus obtained had a width and was dry heat set at 170 ° C. for 3 minutes to obtain a cloth spring material base fabric.
(Knitting organization)
L1: 20/02 / (all-in)
L2: 20/1012 / (all-in)
L3: 44/00 / (all in)

A 50 cm × 57 cm rectangle of 50 cm in the wale row direction and 57 cm in the course row direction is cut out from the obtained fabric spring material base fabric, and the entire circumference is cut at a distance of 4 mm from the cut end with a # 8 polyester yarn sewing thread. A cloth spring material in which fraying from the cut end portion was prevented by performing main sewing at a stitch pitch of 5 mm was obtained. A sample for evaluating elongation followability, seam strength, and fraying prevention properties was fabricated from a base fabric for cloth spring material at a seam pitch of 5 mm and evaluated. The obtained results are shown in Table 1 together with various characteristics of the cloth spring material.
The obtained cloth spring material had poor fraying prevention properties, low seam strength, and considerably poor elongation followability.

  The cloth spring material of the present invention can prevent the spread of fraying from the cut end of the cloth spring material made of warp knitted fabric by a simple sewing method, and physical properties such as elongation characteristics and stitch strength are hindered by sewing. It is a fabric spring material that never happens. Therefore, it is suitably used as a member having excellent safety for use as a cushion material for seat seats for automobiles, railway vehicles, airplanes, child seats, strollers, wheelchairs, furniture, offices and the like.

Claims (2)

  A cloth spring material in which a sewing thread is sewn into at least a part of the periphery of a cutting portion of a warp knitted fabric having a product of the number of courses of a ground structure and the number of wales of 100 to 600. The stitch pitch B (mm) in the course row direction and the stitch pitch C (mm) in the substantially course row direction (C / B) is 1.0 to 4.0. The cloth spring material is characterized in that the sewing thread penetrates the stitch at at least one place per five stitches of the sewing thread that are sewn in a substantially course row direction.   2. The cloth spring material according to claim 1, wherein the ground structure is composed of at least two knit loop structures, and at least one knot is a chain knit or one-needle swing tricot knit.