JP5604065B2 - Narrow fabric for seat belts - Google Patents

Description

  The present invention relates to a narrow woven fabric for seat belts composed of a narrow woven fabric with ears woven by a needle loom and a method for producing the same, and in particular, using a needle loom, both sides thereof have the same structure. A belt webbing having an ear portion composed of a chain stitch structure, and a narrow fabric for a seat belt constructed so that the wefts constituting the narrow fabric are not visually recognized from the outside of the ear portion, and a method for producing the same It is about.

  Automobile seat belts are the most basic system for protecting passengers from impact in the event of a collision and are now used in almost all automobiles. Conventionally, the front seat of an automobile is equipped with a seat belt equipped with a retractor for winding up a narrow fabric (hereinafter referred to as webbing) for the seat belt, and the rear seat is equipped with a seat belt without a retractor. In many cases, however, in recent years, from the viewpoint of improving the safety of the rear seat at the time of a collision, the number of rear seats equipped with a retractable seat belt is increasing. Under such a trend, the arrangement of the seat belt system including the retractor is a non-negligible element when considering the design of the interior of a car, and the weight of the entire vehicle is also reduced in terms of increasing the degree of freedom in design. Reducing the volume of the retractor is also considered a significant theme for the advancement of computerization. Considering the current structure of the retractor, the webbing that occupies the largest volume is the webbing stored inside the retractor, so the width is reduced or the thickness is reduced while maintaining the webbing performance. By doing so, it is considered that reducing the volume of the stored webbing itself leads to reducing the volume of the retractor.

  Narrowing the width of the webbing can provide a certain degree of freedom by adding knowledge of existing webbing design at the design stage, but when considering use as a seat belt system, the width of the webbing becomes narrower. If it is too much, it will affect the stress applied to the occupant at the time of collision, and there are many examples where the lower limit of the width is set by official standards and original standards of each automobile manufacturer. Limited.

  On the other hand, in order to solve the problem of reducing the thickness of the webbing, a method of reducing the number of wefts driven and increasing the strength utilization rate to reduce the number of warp yarns or a method of thinning the weft yarns can be considered. However, the above-described method has a problem that the rigidity in the width direction of the seat belt webbing is reduced. In the case of seat belt webbing, the operation of being wound around the retractor or unwinding from the retractor is frequently performed. It is necessary to set the hardness to a desired hardness. That is, if the bending strength in the width direction of the seat belt webbing is not sufficient, when the seat belt is operated, the seat belt is bent or folded in the width direction, so that the inside of the retractor There arises a problem that the seat belt cannot be stored or cannot be easily pulled out from the retractor.

  As means for improving the bending hardness in the width direction and increasing the rigidity of the seat belt webbing, a thick yarn is used as the weft of the seat belt webbing, or only monofilament yarn or monofilament yarn and multifilament yarn are used. It has been proposed to use blended yarn. However, the use of thick yarns for the wefts contradicts the above-mentioned requirement to make the wefts thinner in order to reduce the thickness of the webbing, and acts to increase the thickness of the webbing. Therefore, as a means for improving the bending hardness in the width direction and increasing the rigidity without affecting the thickness of the webbing, it is considered that the most realistic choice is to use a monofilament yarn for the weft.

  As a method for producing a seat belt webbing, it is common to use a needle loom to insert a weft thread from one side between warp groups to form a woven structure to produce the seat belt webbing. Attempts to weave webbings using multifilament yarns as wefts in this general production method were made experimentally. However, the multifilament yarns are exposed at the ends of the wefts at both ends of the webbing. As a result, the feeling of the ear part, which is a very important factor in the merchantability of the webbing, is extremely deteriorated. As a method for solving this problem, for example, in US Pat. No. 4,313,473 (Patent Document 1), both monofilament yarns and multifilament yarns are used as wefts to prevent exposure of the monofilament yarns to the webbing ends. However, a technique for improving the bending hardness in the width direction and increasing the rigidity is disclosed.

  Japanese Patent Application Laid-Open No. 2006-161265 (Patent Document 2) discloses a technique for weaving webbing by a method of inserting a weft thread from both sides between a warp group using a needle loom. It is described that multifilament yarn and monofilament yarn are used for the weft.

  In addition, JP 2004-324011 A (Patent Document 3) is known as a technique for improving the characteristics of the ears in the seat belt webbing using monofilament yarn as the weft.

US Published Patent No. 4313473 JP 2006-161265 A JP 2004-324011 A

  As described above, in order to reduce the volume of the seat belt webbing in the seat belt system, it is necessary to reduce the thickness of the webbing itself. A method of reducing the number of warp yarns by increasing the warp or a method of thinning the weft yarn can be considered. In such a method, since the rigidity in the width direction of the webbing is reduced, a method using a monofilament yarn for the weft is used to compensate for this. However, the technology known so far is only for the purpose of increasing the rigidity in the width direction of the webbing using monofilament yarn as the weft, and for the purpose of reducing the thickness of the webbing which is the original requirement. There are no examples that can be applied. Therefore, in the present invention, wefts of monofilament yarn are inserted from both sides of the webbing fabric, the rigidity in the width direction of the webbing is increased without increasing the thickness of the webbing, and the monofilament yarn is not exposed at the end of the webbing. Thus, the present invention provides a narrow woven fabric that does not impair merchantability as a seat belt webbing and a method for producing the same.

In order to achieve the above-described object, the present invention basically employs a technical configuration as described below. That is, the first aspect of the seatbelt webbing according to the present invention is a seatbelt webbing woven using a needle loom, and the webbing includes a plurality of warp groups and the warp groups. Inside, the weft yarn containing at least a part of the monofilament is woven with the weft group driven alternately in the folded state separately from the left and right edge portions of the warp group, and At the left and right edge portions of the warp group of the webbing, a chain knitting structure made of entangled yarn made of yarns different from both the yarns constituting the warp group and the yarns constituting the weft group is arranged. The chain knitting structure is not engaged with the end portion on the return side of the weft, only engaged with the end portion on the draw side of the weft, and the engagement portion is within the warp group. Has a pulled-in configuration And, folded end of the weft is engaged with the warp of the top edge portion of the ear portion and characterized in that the weft is configured so as not be visible from the chain stitch structure A seat belt webbing, and a second aspect of the present invention is a method for producing a seat belt webbing woven using a needle loom, the webbing comprising a plurality of warp groups. The weft yarns containing at least a portion of the monofilament are driven alternately from the left and right edge portions of the warp group in an individually folded state, and the left and right edge portions of the warp group are When the webbing is woven by forming the ear portion composed of the chain knitting structure by the entanglement yarn, the chain knitting structure is not engaged with the folded-back end portion of the weft, and the weft of the weft Pull-in side end Only engagement with, so as to have a configuration in which the engaging portion is drawn into the warp in groups, the folded end portion of the weft is engaged with the warp yarns of the top edge portion of the ear portion The weft arrangement position change to change the arrangement position of the weft yarn to the position corresponding to the stitch forming portion of the knitting needle that engages the entanglement yarn constituting the chain knit structure at the left and right edge portions of the warp group Providing a means for operating the weft arrangement position changing means when another weft moves from the other end edge of the weft yarn at one end edge to form the chain stitch structure A webbing manufacturing method for a seat belt, wherein the webbing is moved away from the operating position of the knitting needle.

  Since the seatbelt webbing and the method for manufacturing the seatbelt webbing according to the present invention adopt the above-described technical configuration, the thickness of the seatbelt webbing is set to, for example, 1.0 mm or less. Even if it is a thing, the bending hardness of the width direction of the said seatbelt webbing has a level equivalent to the product similar to the conventional seatbelt webbing, and, of course, the both ends of the said seatbelt webbing Ears made of chain stitches sufficiently cover the side surfaces of both ends of the seat belt webbing, and wefts do not appear on the outer surface of the ears and cannot be seen through from the outside. Thus, it is possible to obtain a high-quality seat belt webbing that is soft in texture and sufficiently secure in wear resistance.

FIG. 1 is a diagram for explaining the configuration of a specific example of seat belt webbing according to the present invention. FIG. 2 is a diagram schematically illustrating the configuration of an apparatus as a specific example of a method for weaving a seat belt webbing according to the present invention. FIG. 3 is a view for explaining the operation and function of the weft arrangement position changing means in the weaving process of the seat belt webbing according to the present invention.

  Hereinafter, the configuration of a specific example of the seat belt webbing according to the present invention will be described in detail with reference to the drawings. That is, FIG. 1 is a plan view showing a configuration of a specific example of a seatbelt webbing 1 according to the present invention, in which a seatbelt webbing 1 woven using a needle loom, The webbing 1 includes a plurality of warp groups 2 and wefts 4 including monofilaments at least partially in the warp groups 2 alternately from left and right edge portions 7 and 7 ′ of the warp group 2. Are woven with the weft groups 4 driven in the individually folded states 8 and 8 ', respectively, and the left and right edge portions 7 and 7' of the warp group 2 of the webbing 1 are Ear portions 6 composed of chain knitted structures 10, 10 'with entangled yarns 9, 9' made of yarns that are different from any of the yarns constituting the warp group 2 and the yarns constituting the weft group 4. 6 'is arranged, and the chain structure 10, 10' The weft 4 is not engaged with the folded-back end portions 11 and 11 ′, but is engaged only with the drawing-side end portions 12 and 12 ′ of the weft 4 to form engaging portions 13 and 13 ′. The engaging portions 13 and 13 'are drawn into the warp group 2, and the weft yarns 4 and 4' are configured so that they cannot be seen by the chain knitting structures 10 and 10 '. A seat belt webbing 1 is shown.

  That is, in the seatbelt webbing 1 according to the present invention, on the outside of the warp yarns 21 and 21 ′ forming both end portions of the plurality of warp group 2 constituting the main body portion 20 of the seatbelt webbing 1. A chain knitted structure 10, 10 'formed by a chain knitting structure with an entangled yarn 9 made of a yarn different from the warp yarn 2 and the weft yarn 4 is arranged in direct contact. Of the chain knitting structures 10 and 10 ′, the entangled yarn 9 constituting the chain knitting structure 10 disposed at one end of the warp group 2 is opposite to the warp group 2. The engagement portion 13 is formed by engaging only the drawing-side end portion 12 of the weft 4 passing through the warp group 2 in a folded shape 8 by a predetermined needle 5 from the end of the engagement portion. The joint portion 13 is configured to be drawn into the warp group 2 by the tension received by the weft 4. On the other hand, the entangled yarn 9 is applied by another needle 5 ′ from the edge of the warp group 2 where the chain knitted structure 10 is present toward the warp end edge side opposite to the warp group 2. Another weft 4 ′ inserted through the warp group 2 is inserted so as not to engage with the folded-back end 11 of the weft 4 formed at the end edge.

  That is, in the configuration in the vicinity of the ear portion 6 of the seatbelt webbing 1 according to the present invention, the entangled yarn 9 made of a yarn different from the warp yarn 2 and the weft yarn 4 is an edge portion of the warp yarn. In this case, it is configured to engage only with the weft draw-in side end portion 12 and not with the weft return end portion 11, and at the same time, the entangled yarn 9 and the weft draw-in side The engagement portion 13 with the end portion 12 has a structure drawn into the inner side of the warp group 2, and the ear portion 6 made of the chain stitch structure 10 is firmly and stably associated with the seat belt webbing. 1 is fixed to the end edge of the main body 20. That is, the pull-in side end portion 12 of the weft 4 in the present invention is engaged with a part of the loop formed by the entangled yarn 9 forming the chain knitted structure 10. In the present invention, an ear portion 6 'having the same configuration is also formed at the edge portion of the warp group opposite to the main body portion 20 of the seat belt webbing.

  The retracting position of the engaging portion 13 between the entangled yarn 9 and the weft retracting side end portion 12 in the present invention is not particularly limited, depending on the characteristics required for the seat belt webbing. It is possible to determine as appropriate. On the other hand, in the present invention, a chain stitch structure is used in synchronism with the knitting of the entangled yarns 9 and 9 'using the entangled yarns 9 and 9' as another locking yarn 14 and 14 'as a locking thread. It can also be knitted. In the present invention, the entangled yarns 14 and 14 'are preferably formed of appropriate yarns and are not configured to engage with the weft yarns 4 and 4'. In the present invention, the entangled yarn 9 supplied separately from the weft 4 and the warp 2 constituting the main body 20 of the seatbelt webbing 2 at the ears 6 and 6 ′ of the seatbelt webbing 1. , 9 ', the configuration of the ears 6, 6' can be freely designed.

  The wefts 4, 4 'used in the present invention may be composed of monofilaments, or may be a combination of monofilaments and multifilaments.

  As described above, in the present invention, the weft-side end portions 11 and 11 ′ of the weft yarns 4 and 4 ′ are the extreme ends of the warp group 2 that forms the main body portion 20 of the seatbelt webbing 1. The woven structure in the vicinity of the ears 6 and 6 ′ can exhibit sufficient performance with respect to characteristics such as strength, hardness, and wear. Is. Specific examples and comparative examples of the seatbelt webbing 1 in the present invention are shown in Tables 1 to 6 of the attached sheets.

  That is, Table 1 shows the configuration and test results of the first example of the seat belt webbing according to the present invention. In the first example, the same weaving structure as shown in FIG. The structure is adopted, and 276 polyester synthetic fiber multifilament yarns (fineness: 1670T, diameter 0.175 mm) are used as warp yarns 2, and polyester synthetic fiber monofilament yarns (fineness: 267T) as weft yarns 4. 2) Two needles were inserted into the needles 5 and 5 ′ individually and used.

  For the entanglement yarn 9, two polyester-based synthetic fiber multifilament yarns (fineness: 1100T) were used by being individually engaged with the respective knitting needles 31 and 31 '.

  As the locking yarn 14, two polyester-based synthetic fiber multifilament yarns (fineness: 280T) were used by being individually engaged with the knitting needles 31 and 31 'in correspondence with the respective entanglement yarns 9. .

  The webbing 1 manufactured according to Example 1 had a weaving width of 47.5 mm, a weft threading number of 22.0 / 30 mm, and a thickness of 1.08 mm.

  Moreover, regarding the webbing 1 of Example 1, tensile strength (KN), residual strength (%) after abrasion test (hexagonal bar: 5000 times), hardness (longitudinal direction) (Gurley value), and hardness (width) (Direction) (Gurley value) was measured individually, and the results are shown in Table 1.

  On the other hand, as a comparative example of the above-described Example 1, a 2/2 / twill weave structure is employed using a single-side needle type needle loom that has been widely manufactured, and as shown in Patent Document 3 described above. One end edge of the warp is composed of a woven ear, and the other end edge is a webbing 1 on which a chain knitting ear is formed. The same items as those shown in Table 1 were manufactured and tested, and the results are shown in Table 2.

  In the comparative example, the weft is a polyester synthetic fiber multifilament yarn (fineness: 560 T).

  As is clear from the above comparison, in the comparative example, the warp yarn has the same fineness as in Example 1 of the present invention, but the number of used yarns is large, and the weft yarn is nearly twice as thick as that in Example 1 of the present invention. In contrast, the entangled yarn is smaller, but the evaluation characteristics are approximately similar to each other, but the webbing thickness of the comparative example is 1.22 mm, which is quite thick. In the embodiment of the invention, it is found that an ideal webbing having a thickness substantially close to 1 mm is obtained in the webbing.

  Next, Table 3 shows the configuration and test results of the second example of the seat belt webbing according to the present invention. In the second example, the same woven structure as shown in FIG. Employing a woven structure, the warp yarn 2, weft yarn 4, entanglement yarn 9 and locking yarn 14 all have the same configuration as in Example 1, but only the number of warp yarns used is set to 238.

  The webbing 1 manufactured according to Example 2 has a weaving width of 47.5 mm and a weft threading number of 23.0 / 30 mm, but an ideal webbing of 0.98 mm and a thickness of 1 mm is obtained. It was.

  Moreover, regarding the webbing of Example 2, the tensile strength (KN), the residual strength (%) after the wear test (hexagonal bar: 5000 times), the hardness (longitudinal direction) (Gurley value), and the hardness (width direction) ) (Gurley value) was measured individually, and the results are shown in Table 3. Although the characteristics are slightly lower than those of Example 1, there is no substantial problem.

  On the other hand, as a comparative example of the above Example 2, when manufacturing a webbing having the same woven structure as that of the comparative example with respect to the above-described Example 1, three types of webbing with variously changed yarn configurations were manufactured, and a comparative experiment was performed. The results are shown in Tables 4-6.

  However, in the comparative example 1 of the example 2, the fineness of the entangled yarn is doubled and the number of warps used is reduced to 252 compared to the comparative example of the example 1.

  Further, when comparing Comparative Example 1 and Example 2 of Example 2, polyester weft multifilament yarn (fineness: 560T) is used as the weft, and the weft of Example 2 is multi- In addition to the difference between the two, the fineness of the weft of Comparative Example 1 of Example 2 is twice the fineness of the weft of Example 2.

  As is clear from the comparison between Table 4 and Table 3, in Comparative Example 1 of Example 2, the fineness of the warp is the same as that of Example 2 of the present invention, but the number of used yarns is large, and the weft is an example of the present invention. Compared to the two, multifilaments are used and the fineness is nearly doubled. Furthermore, in Comparative Example 1 of Example 2, the thickness of the entangled yarn is nearly twice as thick as that of Example 2. This is a comparative example in which the tensile strength in Comparative Example 1 of Example 2 is equal to that of both of Example 2, but in the end, the thickness of the webbing according to Comparative Example 1 of Example 2 It was found that it was impossible to obtain a thin webbing that was the object of the present invention.

  Table 5 shows the configuration and characteristic values of the webbing according to Comparative Example 2 of Example 2 described above, and Comparative Example 2 of Example 2 includes the comparative example shown in Table 2. When producing a webbing having the same woven structure, the warp and the entanglement are the same as the warp and the entanglement in Example 2, but the weft is a polyester synthetic fiber multifilament yarn (fineness). : 560T) and a polyester-based synthetic fiber monofilament yarn (fineness: 700T). The fineness is 2.3 times that of the weft of Example 2.

  As is clear from the comparison between Table 5 and Table 3, in Comparative Example 2 of Example 2, the weft yarn has the same fineness as that of Example 2 of the present invention, and the hardness of the webbing in the width direction is curved. However, it has been found that the thickness is 1.20 mm and does not meet the purpose of the present application to reduce the thickness.

  On the other hand, Table 6 shows the configuration of the webbing according to Comparative Example 3 of Example 2 and the characteristic values thereof. As Comparative Example 3 of Example 2, the comparative example shown in Table 2 and When manufacturing a webbing having the same woven structure, the warp and the entanglement are the same as the warp and the entanglement of the comparative example shown in Table 2, but the weft is a polyester synthetic fiber multifilament yarn. (Fineness: 280T) is used, and the fineness is slightly thicker than the polyester synthetic fiber monofilament yarn (fineness: 267T) of the weft of Example 2.

  On the other hand, as is clear from the comparison between Table 6 and Table 3, in Comparative Example 3 of Example 2, the weft is a polyester-based synthetic fiber multifilament yarn (fineness: 280T), whereas in Example 2, Since the polyester synthetic fiber monofilament yarn (fineness: 267T) is used, the weft fineness of the comparative example 3 of Example 2 is implemented in addition to the difference between multi and mono to the weft of Example 2. It is set to be slightly thicker than the fineness of the weft in Example 2.

  On the other hand, Comparative Example 3 of Example 2 is based on the concept that the weft is thinned to reduce the thickness of the webbing, and the webbing thickness is 1.04 mm. However, since the hardness in the width direction is significantly reduced, there is no practicality at all.

  Next, a specific example of the method for manufacturing the seatbelt webbing 1 according to the present invention will be described in detail with reference to FIGS.

  That is, in FIG. 2, the manufacturing method of the seat belt webbing 1 in the present invention is a manufacturing method of the seat belt webbing 1 woven using the needle loom 30, and the webbing 1 is The weft 4 including a monofilament yarn at least partially in the plurality of warp 2 groups, the needle 5 provided on the outer side of the left and right end edges 21, 21 ′ of the warp group 2, When the webbing is woven, the left and right edges of the warp group 2 are alternately driven from the outer sides of the left and right end edges 21 and 21 'by 5'. Weft arrangement position changing means 22 and 22 ′ for changing the arrangement position of the weft 4 in the vicinity of the outside of the portions 21 and 21 ′ are provided, and one of the weft arrangement position changing means 22 and 22 ′ is connected to the warp group 2 One end When the weft 4 'on the side of the portion 21' is moved from the other edge side where the other edge portion warp 21 is moved, the weft 4 ' The seatbelt webbing manufacturing method is characterized in that the knitting needles 31 forming the knitted structure 10 are displaced so as to be separated from the operating position of the knitting needles 31, that is, near the position where the stitches are formed.

  Thereafter, when the weft 4 'is inserted between the warp groups 2 toward the opposite end edge by the needle 5', the warp 21 'constituting one end edge of the warp group 2 is used. It is desirable that the weave structure is different from the weave structure when the weft 4 is inserted between the warp groups 2 from the opposite end edge side by the needle 5.

  Such a configuration is the same in the weft arrangement position changing means 22 on the opposite side.

  The needle loom 30 used in the present invention has a configuration as shown in FIG. 2, and specifically, two needles 5 and 5 ′ that operate alternately in opposite directions. Are arranged at the end formed by the warp group 2 while gripping the wefts 4 and 4 'fed from the appropriate weft supply means 32 and 32', respectively. Is inserted toward the other edge portion side where the other edge portion warp yarn 21 ′ exists, and engages with the knitting needles 31 and 31 ′ for forming the chain stitch arranged on the other edge portion 21 ′ side. To complete the weft operation. In addition, 3 shows a wrinkle.

  In the needle loom 30 having such a structure, in the present invention, as shown in FIGS. 3A and 3B, the entangled yarn provided in the vicinity of both end portions 21 and 21 ′ of the warp group 2. 9, 9 '(if necessary together with the locking yarns 14 and 14') is provided in the vicinity of the operating position where the stitches of the vertical knitting needles 31 and 31 'forming the chain knitted structure 10, 10' are formed by chain knitting. For example, the weft 4 inserted between the warp groups 2 by the needle 5 from the end edge 21 side of one warp group 2 toward the end edge 21 ′ opposite to the warp group 2 is inserted. When engaging with the warp knitting needle 31 ′, weft arrangement position changing means 22, 22 ′ for changing the arrangement position of the weft 4 ′ so that another weft 4 ′ does not engage with the knitting needle 31 ′ It is to be provided.

  The weft arrangement position changing means 22 and 22 ′ may be of any structure as long as it has the above function. For example, as shown in FIG. 3, the wefts 4 and 4 ′ are partially locked. It is desirable to have a hook-like portion to hold and to displace the weft placement position upward, downward or sideward at an appropriate timing. Further, as the displacement mechanism, for example, a rotary cam 35 as shown in FIG. 3 can be used.

  That is, in the present invention, the weft 4 is moved by the needle 5 from the side where the end edge warp 21 opposite to the warp group 2 is present to the end side where the edge warp 21 'of the warp group 2 is present. At the time of insertion, the weft arrangement position changing means 22 'is driven, and the knitting needles 31, 31' for forming the chain stitch are placed in the end portions 11, 11 'of the wefts of the other weft 4'. The disposition position of the other weft yarn 4 ′ is displaced so as to be separated from the operating position of the knitting needle 31 ′ so that it does not enter.

  By this operation, the knitting needle 31 ′ is folded by the weft 4 inserted by the needle 5 from the opposite end edge 21 side of the warp group 2 to the end edge 21 ′ of the warp group 2. The entangled yarn 9 enters the drawn-in side end portion 12 and is drawn in to form the next loop, but it can be configured not to be engaged with the other weft 4 '. As a result, it is possible to realize a configuration in which the other weft 4 ′ is not directly engaged with the entangled yarn 9 but is directly contacted with the warp 21 ′ of the endmost portion 7 of the warp group 2 and folded back. . At this time, it is desirable that the positions of 12 and 12 'are drawn at least 1 mm from the end edges 21 and 21' in order to improve the touch of the ear.

  Another aspect of the present invention is a seatbelt webbing production apparatus woven using a needle loom, wherein the webbing includes a monofilament at least partially in a plurality of warp groups. It consists of a pair of needles that drive the contained wefts alternately from the left and right end edges of the warp group in an individually folded state, and a chain knitted structure made of entangled yarns on the left and right end edges of the warp group A pair of knitting needles provided at the left and right edge portions of the warp group forming the ear portion, and the seatbelt webbing manufacturing apparatus further includes a pair of knitting needles at the left and right edge portions of the warp group. The weft arrangement position changing means for changing the arrangement position of the weft is provided at a position corresponding to the stitch forming portion of the knitting needle that engages with the entangled yarn constituting the chain knit structure. The changing means has a function of separating the weft yarn at one end edge from the operating position of the knitting needle when another weft moves from the other edge portion. Webbing manufacturing equipment.

  The seat belt webbing according to the present invention can be effectively used for a safety belt of a vehicle.

1. 1. Webbing for seat belt 2. Warp筬 4, 4 '. Weft 5, 5 '. needle,
6, 6 '. Ear 7,7 '. 7. Edge of warp group 8. Weft folds Tangle 10, 10 '. Chain structure 11, 11 '. Weft return end 12, 12 '. Pull-in side end portions 13, 13 '. Engaging portion 30. Needle loom 31, 31 '. Knitting needle 32. Weft supply means

Claims (7)

A webbing for a seatbelt woven using a needle loom, wherein the webbing includes a plurality of warp groups, and a weft yarn including at least a part of a monofilament in the warp group. It is woven with a weft group driven in an individually folded state alternately from the left and right edge parts, and the left and right edge parts of the warp group of the webbing are connected to the warp group. A chain knitting structure made of entangled yarns that are different from any of the yarns constituting the weft group and the yarns constituting the weft group is disposed, and the chain knitting structure is connected to the end portion on the folded side of the weft yarn. Is engaged only with the drawing-side end portion of the weft, the engaging portion is drawn into the warp group, and the weft-turning end portion of the weft It is the endmost edge of the ear portion warp and engaging And the seat belt webbing, characterized in that the weft is configured so as not be visible from the chain stitch structure. 2. The seat belt webbing according to claim 1, wherein the chain knitted structure further includes a chain knitted locking yarn that does not engage with the weft. The warp group is composed of a plurality of main body warps and a plurality of ear warps that are the same as or different from the main body warps arranged on both sides of the main body warps. The webbing for seatbelts of 1 or 2. At both edge portions of the webbing, the chain knitted structure is formed only by a configuration in which the engagement portion with the drawing-side end portion of the weft is drawn into the warp group. The seat belt webbing according to any one of claims 1 to 3, wherein the seat belt webbing is joined to an edge portion. 5. The seatbelt webbing according to claim 4, wherein an end of the weft thread on the drawing side is engaged with a part of a loop formed by the entangled thread forming the chain knitted structure. A method of manufacturing a webbing for a seat belt woven using a needle loom, wherein the webbing includes a plurality of warp groups in which wefts including at least a part of a monofilament are on the left and right sides of the warp groups. The webbing is woven by forming an ear part composed of a chain knitting structure of entangled yarns at the left and right end edges of the warp group alternately and alternately driven from the end edges. In doing so, the chain knitting structure is not engaged with the end portion on the folded side of the weft, only engaged with the end portion on the drawing side of the weft, and the engaging portion is in the warp group. The weft thread end of the weft is engaged with the warp at the outermost edge of the ear and the chain braid at the left and right edges of the warp group so as to have a retracted configuration . Engagement with entangled yarn constituting the structure Weft placement position changing means for changing the placement position of the weft yarn is provided at a position corresponding to the stitch forming portion of the knitting needle, and the weft yarn at one end edge portion is connected to another weft yarn from the other edge portion. A seatbelt webbing manufacturing method, wherein when moving, the weft arrangement position changing means is operated to move away from the operating position of a knitting needle forming the chain stitch structure. An apparatus for manufacturing a webbing for a seat belt woven using a needle loom, wherein the webbing includes a plurality of warp groups and wefts including at least a part of monofilaments on the left and right sides of the warp groups. Alternately from the end edges, a pair of needles that are individually folded, and left and right ends of the warp groups forming ears made of chain stitch structures of entangled yarns at the left and right end edges of the warp groups A pair of knitting needles provided at the end edge portion, the webbing manufacturing apparatus for the seat belt, the chain stitch structure is not engaged with the folded-back side end portion of the weft, Only the folded-back end of the weft is connected to the end of the ear so that the engaging portion is engaged only with the draw-side end of the weft and the engaging portion is pulled into the warp group. engaged with the warp of the edge At the left and right edge portions of the warp group at a position corresponding to the stitch forming portion of the knitting needle that engages the entangled yarn constituting the chain stitch structure. There is provided a weft arrangement position changing means for changing the arrangement position, and the weft arrangement position changing means is adapted to move the weft at one end edge and another weft from the other edge. And a seatbelt webbing manufacturing apparatus characterized by having a function of separating from the operating position of the knitting needle.

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