JP4994861B2 - Weaving method and weaving apparatus - Google Patents

Description

  The present invention relates to a method and an apparatus for weaving a woven fabric by translating a weft thread inserted into a warp opening portion by a heel into a warp yarn and driving it into the weft front side.

  For example, in Patent Document 1, a weft is inserted into a warp opening region by a heel, the weft is moved in parallel toward the front of the weave while maintaining a tension state, and the weft is driven into the fabric. In this weaving apparatus, the weft and the warp have a right angle and the width of the weft is stable. Moreover, the fabric holding device for pressing the fabric is constituted by a pair of rollers that sandwich the fabric.

JP 2006-89857 A

  An example of the weaving method in the weaving apparatus as described above will be described with reference to FIG. First, as shown in a side view in FIG. 6A, the warp T is opened up and down with a scissors (not shown), and a new weft F0 is inserted into the opening. At this time, the woven fabric W that has already been woven is held between the rollers 91 and 92 of the fabric holding device 90 from above and below.

  Next, the warp T is closed and the weft F0 that has been inserted is advanced in the pre-weaving direction (left direction in the figure) with both ends fixed, and translated to the foremost position, that is, the position in contact with the fabric W (see FIG. 6 (b) side view). At this time, the weft F0 may be deformed into a substantially arc shape by friction with the warp T (see the plan view of FIG. 6B). Therefore, by bringing the heel 40 into contact with the weft F0 from behind, the arc shape of the weft F0 can be corrected to be a straight line (see FIG. 6C).

  Thereafter, the fabric W is wound up and the reed 40 is retracted to prepare for the next weft insertion. However, in the state shown in FIG. 6D, since the last weft F0 is not held by the rollers 91 and 92, there is a possibility that a gap α may be formed between the wound fabric W. Alternatively, when the fabric W is wound, the weft F0 may become arcuate again. As described above, when the woven fabric is woven with a gap between the weft yarns or the weft yarn having an arc shape, the finish of the woven fabric is deteriorated and the product value is lowered.

  An object of the present invention is to provide a weaving method and a weaving apparatus capable of obtaining a fabric having a good finish by preventing a gap between wefts or an arc shape of the wefts when driving the wefts into the fabric. .

In order to solve the above-mentioned problems, the present invention provides a weaving method in which a weft consisting of a band-like fiber bundle inserted into a warp opening by a scissors is moved parallel to the front side of the weave and driven into the warp. A step of weft insertion into the opening, a step of translating the weft to a forefront position of the warp opening together with the weft supply device while maintaining a tension state, and a weft thread contacting the weft from behind to the weft Winding the woven fabric by the width of the weft while moving the heel parallel to the front side of the weave while maintaining the linear shape of the weft by bringing the heel into contact with the weft. And the step of holding the weft yarn from above and below with a fabric holding device.

  As described above, in the weaving method of the present invention, the weft is brought into contact with the weft so that the weft is linear, and the fabric is wound while maintaining this state. Thereby, the weft can be advanced while maintaining the straight shape of the weft. In addition, by holding the linear weft by sandwiching it from above and below with the fabric holding device, the linear shape of the weft does not collapse even if the heel is retracted after that. Accordingly, it is possible to avoid a situation in which a gap is generated between the wefts of the woven fabric or the wefts have an arc shape.

  In the weaving method as described above, in the weaving apparatus provided with a wrinkle for opening a warp, a wrinkle that can be translated in a warp opening region by the reed, and a fabric holding device that holds the fabric from above and below, a warp opening It can be realized by a weaving device characterized in that the weft yarn can be held by the fabric holding device in a state where the weft yarn is inserted into the weft and brought into contact with a reed to form a straight line.

  Further, when the fabric holding device is constituted by a pair of plate members facing each other with the fabric interposed therebetween, the fabric can be reliably held in a wide area. In such a case, the fabric can be wound smoothly by releasing the holding of the fabric holding device simultaneously with the winding of the fabric.

  Alternatively, when the fabric holding device is configured with members opposed to each other with the fabric interposed therebetween, and at least one of them is a roller, the contact resistance between the warp and the roller can be reduced as compared with the case where it is configured with a plate material. In such a case, if the fabric is fed in the winding direction by a roller when winding the fabric, the fabric can be smoothly wound.

  Also, when using flat wefts, if wefts are inserted in a tensioned state and moved parallel to the front side of the weave while maintaining the tensioned state of the wefts, the wefts are driven into the fabric while maintaining the flatness of the wefts. be able to.

  As described above, according to the weaving method and the weaving apparatus of the present invention, when wefts are driven into the fabric, gaps between the wefts and arcs of the wefts are prevented, and a fabric with good finish can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a weaving apparatus for a strip-shaped fiber bundle fabric W. This weaving apparatus includes warp bobbin shafts 2 and 2 ', warp bobbins 2a to 2x and 2a' to 2x ', warp feeding mechanisms (driving rollers 3 and 3', feed rollers 4 and 4 ', nip rollers). 5, 5 ′), a warp opening tension adjusting mechanism 6, 6 ′, guide rollers 7, 7 ′, and a pair of converging rollers 8a for converging the warp T sent from the bobbin shafts 2, 2 ′ by dividing them vertically. , 8b. The warp opening mechanism includes a heel device 20 including a pair of heel units 20a and 20b in which a heel frame and a heel are integrated, and a heel 40. The weft driving device 30 includes a weft bobbin 31, a weft tension adjusting roller 32, a weft tension mechanism 33, a weft holding mechanism 34, a rapier mechanism 35, and a rapier weft grip 35a. Further, as shown in FIG. 2, a fabric holding device 9, fabric gripping rollers 10, 10 a, 10 b, a take-up roller 11, paper and film supply units 50 are provided.

  First, the warp supply device will be described. A number of warp bobbins 2a to 2x and 2a 'to 2x' are rotatably supported on the warp bobbin shafts 2, 2 'of this warp supply device. In FIG. 1, only the warp bobbin shafts 2, 2 'and the warp bobbins 2a-2x, 2a'-2x' are shown. Around the warp bobbins 2a to 2x and 2a 'to 2x', a warp T composed of a belt-like fiber bundle is wound, and the warp T is unwound in the rolling direction of the warp bobbin and guided to the belt-like fiber bundle weaving apparatus side. The warp bobbins 2a to 2x and 2a 'to 2x' are provided on the warp bobbin shafts 2 and 2 'in a vertical zigzag manner, and the interval between the adjacent warp bobbins is the interval between the warp Ts fed from each warp bobbin. It arrange | positions so that it may become as narrow as possible, and each warp T may not overlap.

  The warp feeding mechanism section is formed by arranging a small-diameter feed roller 4, 4 ′ and nip rollers 5, 5 ′ on the upper side of the large-diameter drive rollers 3, 3 ′ in a substantially bilaterally symmetrical manner in a side view. The warp T fed from each warp bobbin passes through the upper part of the feed rollers 4 and 4 'and is set on the lower peripheral surface of the drive rollers 3 and 3'. Further, the drive rollers 3 and 3 'and the nip rollers 5 and 5' Sent to the loom while sandwiching. As a result, variations in the warp T and uniform warp tension are achieved.

  The unwinding speed of the warp T from the warp bobbin is extremely slower than the weft F described later, and is a constant speed that is the same as the weaving speed of the weaving apparatus. Therefore, generally, the warp bobbins 2a to 2x and 2a 'to 2x' may be provided with a brake. The feeding device in this apparatus applies a rotation opposite to the warp feeding direction to the warp bobbin shaft by a motor while applying a light brake to the warp bobbin. Thus, the unwinding tension from the warp bobbin is made constant or stabilized, and the tension of the individually wound warp is adjusted.

  The tension adjusting devices 6 and 6 ′ for adjusting the tension of the warp T include dancer rollers 61 and 61 ′, sensors 62 and 62 ′, and weights 63 and 63 ′. A tension is applied to the warps T and T ′ by the weights of the dancer rollers 61 and 61 ′ and the weights 63 and 63 ′, and the positions of the dancer rollers 61 and 61 ′ are detected by the sensors 62 and 62 ′. By controlling the rotational speed of the driving rollers 3 and 3 ′ based on the result, the feeding amounts of the warps T and T ′ are adjusted and the tension is adjusted.

  The warps T and T 'wound around each warp bobbin are unwound by a warp feed mechanism (rollers 3 to 5, 3' to 5 ') and sent to the weaving apparatus. The warps T and T ′ unwound from the warp bobbin shafts 2 and 2 ′ are sent to the weaving apparatus in a state of being divided into two upper and lower hands, and are converged by a pair of converging rollers 8a and 8b immediately before the weaving apparatus. .

  The scissor device 20 includes a pair of scissors units 20a and 20b. As shown in FIG. 3, the hook units 20a and 20b are arranged between rectangular hook frames 20a1 and 20b1 having a width corresponding to the width dimension of the belt-like fiber bundle, and upper and lower horizontal members of the hook frames 20a1 and 20b1. The plurality of ridges 20a2 and 20b2 are provided. The flanges 20a2 and 20b2 are provided every other in the width direction of the flange frames 20a1 and 20b1. The gap formed between the adjacent heels 20a2 and 20b2 is arranged so as to overlap with the heels 20a2 and 20b2 of the other heel frames 20a1 and 20b1 in the direction of the warp T.

  The scissors units 20a and 20b are repeatedly driven up and down in opposite directions by the driving means 21. The warp T inserted into the gap between the adjacent heels 20a2 and 20b2 is guided to the heel 40 in a state where the position is regulated in the left and right and up and down directions by the heel units 20a and 20b. As the heel units 20a and 20b move up and down, a weft running path (warp opening area) for passing the weft F between the upper and lower warps T on the downstream side of the heel 40 is created.

  Next, the weft supply device will be described. The weft bobbin 31 is installed in a state in which a weft F made of a belt-like fiber bundle is wound and incorporated in the weft driving device 30. The weft F is guided to the weft tension mechanism 33 through the weft tension adjusting roller 32. The weft F made of a band-shaped fiber bundle wound around the weft bobbin 31 is drawn out by the weft gripping portion 35a of the rapier mechanism. At this time, the weft F is appropriately unwound by the weft tension adjusting roller 32 and the weft tension mechanism 33 while the tension variation is as small as possible. When the necessary length for the weft F is obtained by the rapier mechanism 35, the rapier driving stops.

  Here, a method for unwinding the weft F wound around the weft bobbin 31 will be described. When the rapier mechanism 35 moves in the direction in which the weft F is pulled out, the weft tension adjusting roller 32 moves upward in accordance with the speed. Along with this, the motor attached to the weft bobbin shaft follows and rotates, and the belt-like weft fiber bundle wound around the weft bobbin 31 is unwound. Immediately before the rapier mechanism 35 stops, one weft F drawn out by the rapier is held in a state where an appropriate tension is applied by the weft tension mechanism 33 and the weft gripping portion 35a. At the same time as the rapier stops, the weft tension adjusting roller 32 moves downward and stops at a fixed position.

Next, the weft driving process which is a feature of the present invention will be described. FIG. 4 is a side view schematically illustrating the weft driving process. First, a warp T is opened by a scissors in a state where a fabric W in which a weft F is driven into a warp T is sandwiched from above and below by a fabric holding device 9 composed of a pair of plate materials 9a and 9b, and the weft is supplied to the warp opening. A new weft F0 is inserted by the apparatus (see FIG. 4A). In this way, by configuring the fabric holding device 9 with a pair of plate members 9a and 9b, the fabric W can be pressed in a wide range as compared with the case where it is configured with a roller, for example, so that the fabric W is securely held. I can do it. Further, by reducing the thickness of the plate materials 9a and 9b within a range where the fabric W can be held, the fabric holding device 9 can be made compact.

  The weft F0 inserted in the weft is moved to the foremost position of the warp opening by the weft driving device 30 interlocked with the main body drive while being held in a tensioned state (see FIG. 4B). At this time, the arc 40 of the weft F0 is corrected by the heel 40 coming into contact with the weft F0 from behind. At the same time, the warp T is closed and the upper plate 9a of the fabric holding device 9 is slightly raised to release the fabric W held by the fabric holding device 9. In this way, by closing the warp T and then releasing the holding of the fabric W by the fabric holding device 9, it is possible to avoid the problem that the width of the fabric W is reduced by the opening of the warp T, that is, the so-called bus tension is generated. it can.

  Note that the heel 40 is used for driving the weft F in a normal loom. However, in this apparatus, the right angle between the weft F and the warp and the stability of the width of the weft F are strictly limited. For purposes of illustration, it is used as a weft guide member.

  Next, the fabric W is wound up by the width of the weft F0 in a state where the reed 40 is in contact with the weft F0 (see FIG. 4C). Thereby, the fabric W can be wound up without the weft F0 having an arc shape again or without a gap between the weft F0 and the fabric W.

  When the winding of the fabric W having a predetermined length is completed, the upper plate 9a of the fabric holding device 9 is lowered and held again by holding the fabric W from above and below (see FIG. 4D). Thus, when the weft F0 is driven into the warp T and is held from above and below by the fabric holding device 9, the weft gripping portion 35a that holds the weft F0 in a tensioned state is released. Thereafter, the warp T is opened and the reed 40 is retracted (see FIG. 4E), the next weft is inserted, and the above operation is repeated.

  In the weaving apparatus of the present invention, the positional relationship between the fabric holding device 9 and the reed 40 is linear by bringing the reed 40 into contact with the weft F0 inserted into the warp opening according to the width of the weft F0 and the like. In this state, the weft F0 is set so as to be held by the fabric holding device 9.

  Next, the weft entanglement device will be described. In order to hold the belt-like wefts driven by the weft driving device 30, weft tangling devices 16a and 16b are provided, and the wefts are fixed one by one by another yarn from the devices 16a and 16b. Here, the weft entanglement devices 16a and 16b in the case of holding the weft F of the belt-like fiber bundle may be a conventionally known general device. In this case, the weft entangled yarn (hereinafter referred to as “ear yarn”) supplied from the weft entanglement devices 16a and 16b passes between the plate members 9a and 9b of the fabric holding device 9 or in contact with either roller. By doing so, in the ear portion of the fabric W, it is possible to eliminate the shrinkage of the band-like fiber bundle width and the instability of the form caused by the tightening of the weft end portion due to the tension of only the ear yarn.

  After the ear part is formed by the above-described ear thread, excess weft F is cut by the cutting devices 12a and 12b. The fabric W formed with an appropriate weft length in this way is guided to the take-up roller 11 by the fabric gripping rollers 10, 10a, 10b and wound up as a stable fabric W. In this case, the fiber bundle forming the main fabric W is a strip-like fiber bundle, and is thinner than a general fabric W, and there are sparse and dense portions with respect to the fabric density. Problems such as density variations are likely to occur. This apparatus also includes an apparatus (supply unit 50) that solves the above problem by winding kraft paper or film while being sandwiched between the fabrics W.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the fabric holding device 9 that holds the fabric W is configured by a pair of plate members 9a and 9b. However, the present invention is not limited to this, and for example, as shown in FIG. You may comprise with the roller 9c parallel to the weft F. FIG. According to this, the contact resistance with the warp T is reduced, and a situation in which the warp T is frayed or fluffed can be avoided. Hereinafter, the driving process of the weft F0 using this fabric holding device will be shown.

  First, as in the above embodiment, the weft F0 is inserted into the opening of the warp T (see FIG. 5A), the weft F0 is translated to the forefront position of the warp opening, and the heel 40 is moved to the weft F0. (Refer to FIG. 5B). Thereafter, the heel 40 is brought into contact with the weft F0, the fabric W is wound up in a state where the weft F0 is linear, and the weft F0 is sandwiched and held by the fabric holding device 9 (see FIG. 5C). At this time, the roller 9c of the fabric holding device 9 may be a free roller, or may be a drive roller that is driven to rotate in the feed direction of the fabric W. When the roller 9c is a drive roller, the rotational speed is preferably variable according to the density of the weft F in the fabric W.

  In the state where the weft F0 is held by the fabric holding device 9, the fabric W is further wound up, and winding is completed when the fabric is wound by a predetermined length (see FIG. 5 (d)). Thereafter, the opening of the warp T is started and the reed 40 is retracted to prepare for the next weft insertion (see FIG. 5E).

  The fabric holding device 9 is not limited to the above, and may be configured to sandwich the fabric W with a pair of rollers, for example. In this case, the contact resistance with the warp T can be further reduced than in the above embodiment.

  Moreover, although the case where the warp bobbin shaft is supplied from two different levels is shown in the above embodiment, the present invention is not limited to this, and the number may be increased to three, four, five, six, and so on. Good (see, for example, FIG. 1 of JP-A-2001-226856). Alternatively, if it is not necessary to divide the warp bobbin shaft into a plurality of stages, warp may be supplied from one warp bobbin shaft (see, for example, FIG. 1 of Japanese Patent No. 2983531). Moreover, in said embodiment, although the dredger apparatus 20 is comprised with the two dredging units, you may comprise not only this but in many more dredging units. In this case, in order to make the lengths of the respective warps uniform and keep the tension constant, it is desirable that the warp groups that are moved up and down by one reed unit are supplied from the same warp bobbin shaft.

  In the above-described embodiment, the case where the weft driving device 30 that can be translated in parallel to the front of the weave while maintaining the tension state of the weft F0 that has been inserted is shown. In this way, the weft thread that has been inserted may be hammered into the front of the weave (see, for example, FIG. 1 of JP-A-6-136632).

  The weaving apparatus of FIGS. 1 and 2 is a plain weave specification, and the scissor apparatus 20 is composed of a pair of scissors units 20a and 20b. In order to make the weaving apparatus have a multi-weaving specification corresponding to a desired fabric structure, it is sufficient to increase the number of hook units to 3 or more.

  Moreover, as a fiber used for said warp and weft, it is possible to use carbon fiber, glass fiber, polyamide fiber, ceramic fiber, and other fibers used as a substrate for fiber reinforced composite material. The present invention is particularly effective when weaving flat fibers with filament yarn.

It is a top view of the weaving apparatus incorporating the warp supply apparatus of this invention. It is a side view of a weaving apparatus. It is a perspective view of a heel unit. It is a side view which shows the weft driving process in the weaving method of this invention. It is a side view which shows the other example of a weft driving process. It is a side view which shows the weft driving process in the conventional weaving method.

Explanation of symbols

2 Warp Bobbin Shaft 3 Driving Roller 6 Warp Opening Tension Adjusting Mechanism 8a, 8b Converging Roller 9 Fabric Holding Device 9a, 9b Plate Material 10, 10a, 10b Fabric Gripping Roller 11 Winding Roller 12a, 12b Cutting Device 16a, 16b Weft Entangling Device 20 Scissors 20a, 20b Scissor units 20a1, 20b1 Scissors frames 20a2, 20b2 Supply section F, F0 Weft T Warp W Fabric

Claims (4)

A weaving method in which a weft consisting of a band-like fiber bundle weft-inserted into a warp opening by a scissors is moved parallel to the front side of the weave and driven into the warp,
A step of weft insertion into the warp opening by the weft supply device; a step of translating the weft to the foremost position of the warp opening with the weft supply device while maintaining a tension; and A step of bringing the weft yarn into a linear shape by contacting, and maintaining a straight shape of the weft yarn by bringing a kite into contact with the weft yarn, while moving the kite parallel to the front side of the weave, the fabric is divided by the width of the weft yarn. And a step of holding the weft yarn from above and below by a fabric holding device.   The weaving method according to claim 1, wherein the weft holding by the fabric holding device is released when the fabric is wound.   The weaving method according to claim 1, wherein the fabric is fed in the winding direction by the fabric holding device when winding the fabric.   The weaving method according to claim 1, wherein flat wefts are used.

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