JP2006057201A - Net-making method and net-making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a net-making method and a net-making machine with which a net fabric having a scale of mesh smaller than of a conventional net fabric is excellently made by specific knots. <P>SOLUTION: The net-making method comprises using a net-making machine equipped with an upper clasp 16 that rotates and shakes longitudinally, a yarn swinger 17 that guides a yarn A and moves vertically, laterally and longitudinally, a raising plate 19 that raises a weft B and a lower clasp 21 that draws out a warp A from a loop formed on the upper clasp 16. Loops of the weft B and the warp A are formed on the upper clasp 16, the loops of the warp A and the weft B are removed from the upper clasp 16, the loops of the warp A and the weft B are fastened by a stitch feed action of a stitch feed roll 5 to make a net fabric of specific knots. When the stitch feed roll 5 carries out a stitch feed action, a shuttle box 7 housing the shuttle 8 of the weft B is moved to the opposite side of a knot formation part and the weft B is pulled to the opposite knot formation part side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a net making method and a net making machine for making a knot net by a special knot, and in particular, a net making method capable of satisfactorily making a net having a mesh size smaller than that of a conventional net. It relates to a net making machine.

Conventionally, as a net making machine for netting such as fishing nets, in order to make a knot net with little misalignment, a lifting plate for lifting the weft thread is provided, and the weft thread is further wound around the upper hook. A net-making machine that performs so-called special knotting by winding a weft thread on the upper hook while lifting it with a lifting plate is known from Patent Document 1 below.
Japanese Patent Publication No.57-42740

  In a net made with a special knot by this type of net making machine, a knot is formed by tightening the warp and weft loop formed on the upper collar at the end of the knotting process. Since both the warp and the weft need to be tightened at the same time, this is performed by pulling the mesh in the feed direction by the stitch feed roll.

  When netting a double knot network, the loop formed on the upper collar is only warp yarn, so when tightening the loop, the seam roll is forcibly set by the seam mechanism provided in the net making machine. Tension is applied to the loop, and the loop is pulled toward the warp supply side in the direction opposite to the direction in which the net is fed out, thereby forming a knot.

  On the other hand, in a net making machine that performs special knotting, there are capping rolls that apply tension to the warp yarn, but there has been no mechanism that applies forced tension to the weft yarn. In the special knot where both the warp and the weft form a loop on the upper collar, when only the warp is pulled, only the loop formed by the weft remains and it is impossible to form a good knot. For this reason, a conventional net making machine that performs special knotting draws the netting in the feed direction by the stitch feed roll at the end of the knot process, and simultaneously pulls both the warp and weft loops in the feed direction by the stitch feed roll. The loop is tightened.

  However, when the mesh is pulled in the feed direction by the mesh feed roll and the loop is tightened, the tightening margin becomes a mesh foot and becomes relatively long. Will be netted.

  For this reason, the minimum value of the mesh size by the conventional special knot is relatively large at about 60 mm per mesh, and it is difficult to make a special knot network with a relatively small mesh size less than that. There was a problem.

  The present invention solves the above-described problems, and provides a net making method and a net making machine that can satisfactorily make a net having a smaller mesh size than a conventional mesh by a special knot. For the purpose.

  In order to achieve the above-mentioned object, the net making method of the present invention comprises an upper hook that rotates and swings back and forth, a yarn swing that moves in the vertical and horizontal directions while guiding the warp, a lifting plate that raises the weft, and the upper hook. Using a net making machine equipped with a lower hook for pulling out the warp yarn from the formed loop, a loop of the weft yarn and the warp yarn is formed on the upper eyelet, and after the loop of the warp yarn and the weft yarn is removed from the upper eyelet, the feed of the stitch feed roll In a net making method for tightening a warp and weft loop by operation to make a special knot net, when the eye feed roll performs a feed operation, a shuttle box containing the weft shackle is moved to an anti-nodule forming portion. And the weft yarn is pulled toward the anti-nodule forming portion.

  Here, in the net making method, immediately before the lifting plate raises the weft yarn and the upper collar winds the weft yarn, the shuttle box is moved to the anti-nodule forming portion side, and the weft yarn is pulled out from the shuttle. When the upper hook is winding the weft, the shuttle box can be moved to the knot forming portion side and returned to the original position.

  In such a net making method, at the final stage of the knotting process, after the loop of the warp and weft thread is removed from the upper collar, when the stitch feeding roll performs the stitch feeding operation, the shuttle box that forms the shuttle of the weft thread is formed as an anti-nodule. It moves to the part side and operates to pull the weft thread to the anti-nodule forming part side. Therefore, the weft yarn is pulled from the knot forming portion to the anti-nodule forming portion side with an appropriate tension, and the warp yarn is pulled to the anti-nodule forming portion side with an appropriate tension by the seam roll, so that the mesh is formed by the seam feed roll. When the loop is tightened by being pulled in the feed direction, the tightening margin is effectively shortened, and it is possible to make a net with a shorter net foot than the conventional one, that is, a net with a small mesh. it can.

  On the other hand, when the weft thread is lifted by the lifting plate and wound with the upper collar during the knotting process, if excessive tension occurs in the weft thread, the warp thread is sandwiched between the weft thread and the upper collar, and the warp thread is once removed from the upper collar. At this stage, the warp yarn remains on the upper hook without being detached, and as a result of proceeding to the subsequent process, there occurs a problem that the warp yarn is cut. However, when the lifting plate lifts the weft thread and immediately before the upper arm winds the weft thread, the shuttle box is moved to the anti-nodule forming portion side, the weft thread is pulled out from the shuttle, and the upper arm is winding the weft thread. By moving the shuttle box to the knot forming part side and returning it to the original position, the tension of the weft thread is reduced, so that the warp thread can be surely removed from the upper heel and the warp thread cutting accident can be prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a network machine. First, the schematic configuration of the net making machine will be described with reference to FIG. 1. The knot forming section 2 of the net making machine 1 is provided with an upper knot 16 for knitting the net C from the warp yarn A and the weft yarn B supplied thereto. The thread swing 17, the comb plate 18, the lifting plate 19, and the lower rod 21 are arranged so as to form a knot while performing a predetermined operation.

  A shuttle box 7 is movably disposed in the rear part (right side in FIG. 1) of the nodule forming part 2, and a coin (disc-shaped bobbin) around which weft B is wound is accommodated in the shuttle box 7. A number of shuttles 8 are held and accommodated side by side on a shuttle receiver 7a provided at the end of the box. As shown in FIG. 5, the weft thread B wound around the paper money 8b in the shuttle 8 is pulled out from the tip end portion in a state where a weight 8a is applied and a certain amount of tension is applied.

  On the other hand, the warp yarn A is supplied from a bobbin (not shown) provided outside the net making machine 1, and then supplied to the knot forming unit 2 through the yarn swing 17 through the warp yarn supply roll 3 and the seam roll 4. Further, the net C, which is knitted by knotting the warp yarn A and the weft yarn B in the knot forming portion 2, passes through the lower feed roller 5 and passes through a plurality of auxiliary rolls. It is a structure sent out from the discharge roll 6 provided in the rear part (left side of FIG. 1).

  As shown in FIG. 2, the knot forming portion 2 is provided with an upper hook 16 on the upper side, and the upper hook 16 can be wound around the warp yarn A and the weft yarn B rotated around its longitudinal axis. It has a structure that can be tilted to remove the loop formed in the collar. Further, the yarn swing 17 guides the warp yarn A and supplies the warp yarn A while moving up and down, left and right and back and forth, and is moved up and down and left and right and back and forth by a yarn swing drive mechanism (not shown) driven by a main shaft via a cam. Composed. The comb plate 18 is formed of a comb-like plate having a plurality of cuts at the same intervals as the weft yarns B, and is fixed at a predetermined position of the knot forming portion 2 with its tip bent downward, and the warp yarn A In this structure, the knot portion of the weft yarn B and the mesh foot portion forming the mesh are inserted into the notches, that is, the holding recesses between the comb teeth.

  In order to lift the weft B, the lifting plate 19 is disposed on the back of the comb plate 18 in the knot forming portion 2 so as to be movable up and down. A protruding portion for holding a large number of weft threads B is arranged in parallel at the tip of the lifting plate 19, a locking recess is formed therein, and a guide portion 19a for guiding the weft threads B is provided on the back thereof. . The lifting plate 19 is driven to move up and down at a predetermined timing and lift the weft yarn B by a lifting drive mechanism driven by a cam provided on a main shaft (not shown).

  The lower lash 21 is arranged so as to be able to enter the knot forming portion 2 by moving in the front-rear direction above the shuttle 8, and enters the knot loop by a lower heel drive mechanism (not shown) to draw out the warp yarn A from the loop, and the weft yarn B In order to make the shuttle 8 that accommodates the bottom of the shuttle 8 go under the tail of the shuttle 8, the warp yarn A is released from the lower rod 21.

  The mechanism for adjusting the tension of the weft B is constituted by a mechanism for moving the shuttle box 7 that holds the shuttles 8 accommodating the weft B side by side in the front-rear direction (the left-right direction in FIG. 1). That is, as shown in FIGS. 3 and 4, the shuttle box 7 in which a large number of shuttles 8 are accommodated in parallel is held so as to be movable forward and backward of the net making machine, and is inserted into a long hole 7b provided in a part thereof. The pin 15 at the tip of the operating lever 14 is engaged. The base of the operating lever 14 is pivotally attached to the weft draw-out shaft 13, and the shuttle box 7 moves back and forth by the rotation of the weft draw-out shaft 13. The weft draw-out shaft 13 is linked to the main shaft 9 of the net making machine via the slide lever 12a and the crank lever 12b of the crank 12 and the cam follower 11 and the cam 10, and rotates.

  In other words, a cam 10 is fixed to the main shaft 9, and a slide lever 12 a of a crank 12 provided with a cam follower 11 that contacts and follows the cam 10 is disposed. A crank lever 12b is connected to the tip of the slide lever 12a via a crank pin. The crank lever 12b is loosely fitted on the weft draw-out shaft 13 so as to be rotatable. A main body lever 20 a of the weft draw-out adjuster 20 is fixed to the weft draw-out shaft 13.

  The weft draw-out adjuster 20 is configured by screwing the adjustment screw rod 20c into a screw hole provided at the tip of the main body lever 20a and attaching the adjustment handle 20b to the end of the adjustment screw rod 20c. The weft thread drawing amount is adjusted by adjusting the angular position at which the tip of the adjusting screw rod 20c abuts against the crank lever 12b.

  In other words, when the tip of the adjustment screw rod 20c is adjusted so as to protrude toward the lever 12b, the gap between the crank 20 and the slide lever 12a is reduced, and the angular range in which the main body lever 20a rotates is increased as the crank lever 12b is rotated. However, the rotation angle range of the weft drawout shaft 13 is increased, and the weft drawout amount is increased. On the other hand, when the adjustment screw rod 20c is adjusted so that the tip of the adjustment screw rod 20c is returned from the lever 12b, the clearance between the crank 20 and the slide lever 12a increases, and the angle range in which the main body lever 20a rotates with the rotation of the crank lever 12b decreases. However, the rotation angle range of the weft drawout shaft 13 is reduced, and the weft drawout amount is reduced.

  Further, the cam 10 attached to the main shaft 9 moves the shuttle box 7 rearward at a predetermined timing described later, for example, at the timing when the eye feed roll 5 is operated and the eye feed operation is performed at the final stage of the knotting process. The cam 10 is formed and adjusted so as to move and apply tension to the weft thread B. The timing, speed, and time for moving the shuttle box 7 rearward, or the timing, speed, and time for returning the shuttle box 7 to the original position are adjusted by adjusting the shape and mounting angle of the cam 10 attached to the spindle 9. Is adjustable.

  Further, the tension of the weft thread B is adjusted at other timings during the knotting process. For example, the weft thread B lifted by the lifting plate 19 is wound around the upper collar 16 and is first hung on the upper collar 16. In the step of removing the warp yarn A, the shuttle box 7 is moved to the anti-nodule forming portion side immediately before that, and when the weft B is being wound around the upper collar 16, the shuttle box 7 is returned to the nodule forming portion side. It moves so that the tension of the weft thread B is reduced, and the warp thread A operates to be surely removed from the upper collar 16.

  Next, a description will be given of a network making method for making a special knot network using the network machine having the above-described configuration. As shown in FIG. 2, in the state where the preparation of the knot is completed, the thread swing 17 is first raised and the warp thread A is lifted. In this state, the upper thread 16 rotates to the left in a plan view, and the warp thread A is hooked on the upper thread 16. In order to form a loop and hang the weft thread B on the upper collar 16, the weft thread B is lifted as shown in FIG.

  Subsequently, as shown in FIGS. 6 to 7, the upper heel 16 rotates to the right to release the loop of the warp yarn A hung on the upper heel 16 and to rotate the upper heel 16 so as to hang the weft B. At this time, immediately before the lifting plate 19 raises the weft thread B and the upper collar 16 winds the weft thread B, the shuttle box 7 is moved to the anti-nodule forming portion side, and the weft thread B is pulled out from the shuttle 8. Then, when the upper collar 16 is winding the weft B, as shown in FIG. 8, the shuttle box 7 moves to the knot forming portion side and returns to the original position. Thereby, the tension of the weft B is reduced. Then, the yarn swing 17 is raised and the upper collar 16 is rotated to the right, whereby the warp A is removed from the upper collar 16, and a weft thread loop is formed on the upper collar 16 (FIG. 9).

  Thus, since the tension of the weft thread B is reduced when the upper thread 16 winds the weft thread B, the problem that the warp thread A is sandwiched between the weft thread B and the upper thread 16 is eliminated. It will definitely come off the upper arm 16. For this reason, the cutting accident of the warp yarn A can be prevented.

  Then, once again, the thread swing 17 rises and the upper collar 16 rotates, the warp thread A is hung on the upper collar 16, and a loop made of weft and warp is formed on the upper collar 16. Next, the lower eyelid 21 moves toward the knot forming portion 2, the lower eyelet 21 enters the loop formed in the gate portion of the upper eyelet 16, and the warp A positioned in front of the knot forming portion 2 is threaded 17. As a result, the warp yarn A is pulled out from the loop. Then, the lower rod 21 that has pulled out the warp yarn A advances forward obliquely downward to release the warp yarn A so that the shuttle 8 passes through the loop of the warp yarn A. At this time, the seam roll 4 is lowered and the warp yarn A is pulled in, and the warp yarn B is passed through the warp yarn A. Thereafter, the upper collar 16 is tilted, and the loop of the warp yarn A and the weft yarn B is removed from the lower end portion thereof as shown in FIG. 10, and then the stitch feed by the stitch feed roll 5 and the anti-knot of the warp yarn A and the weft yarn B are performed. The nodule is closed by the pull-in operation to the forming part side.

  That is, at the final stage of the knotting process, after the loop of the warp yarn A and the weft yarn B is removed from the upper collar 16 as shown in FIG. The shuttle box 7 containing the shuttle 8 is moved to the anti-nodule forming part side by the operation of the cam 10, the cam follower 11, the crank 12 and the weft draw-out shaft 13, so that the weft thread B is pulled to the anti-nodule forming part side. To work.

  As a result, the weft thread B is pulled from the knot forming part to the anti-nodule forming part side with an appropriate tension, and the warp yarn A is pulled to the anti-nodule forming part side with an appropriate tension by the seam roll 4. By pulling the mesh C in the feed direction by 5, the loop is tightened well. In other words, the tightening allowance is much shorter than when the mesh is simply routed, and a mesh with a short tightening allowance, that is, a mesh with a small mesh, can be made. When a special nodule net is made using a conventional net making machine, the size of the first mesh of the net is as large as about 60 mm. According to the machine, it is possible to produce a net having a small mesh size of about 40 mm.

  In this way, in the process of forming the special knot, when performing stitch feeding in the final process of knot, the shuttle box 7 is moved to the anti-nodule forming part side, and the weft thread B is pulled in the same direction, so that A mesh with a small mesh size can be made, and when the upper collar 16 winds the weft thread B, the tension of the weft thread B is reduced, so that the warp thread A is sandwiched between the weft thread B and the upper collar 16 Thus, the warp yarn A is surely detached from the upper hook 16, and the warp yarn A can be prevented from being accidentally cut.

  As described above, according to the net making method and the net making machine of the present invention, at the final stage of the knotting process, after removing the loop of the warp and weft from the upper eyelid, when the eye feed roll performs the eye feed operation, Since the shuttle box containing the weft thread shuttle moves to the anti-nodule forming part and pulls the weft thread to the anti-nodule forming part, the mesh is pulled in the feed direction by the stitch feed roll, and the loop is tightened. Is performed, the tightening allowance is remarkably smaller than that of the conventional net making method, and a net having a short foot of the tightening allowance, that is, a net with a small mesh can be made.

It is a schematic block diagram of the net making machine which shows one Embodiment of this invention. It is an enlarged side view of the knot forming part 2 of the net making machine. It is a block diagram of the movement drive mechanism of a shuttle box. It is a block diagram of the movement drive mechanism of the state which moved the shuttle box to the back of the nodule formation part. It is an expanded sectional view of the leading end portion of the weft thread in the shuttle. It is a side view of the nodule formation part of the state which raised the raising board during the nodule process. It is a side view of the knot formation part at the time of raising a weft thread with a raising board and hanging on an upper arm during a knot process. FIG. 5 is a side view of a knot forming portion when a weft thread is hung on an upper collar to form a loop and a warp thread loop is released during the knotting step. FIG. 6 is a side view of a knot forming portion when the loop of the warp yarn is finished during the knotting step and the weft yarn is hung on the upper collar to form a loop. It is a side view of the knot forming part in the state where the loop of the warp and weft is removed from the upper heel at the final stage of the knot process.

Explanation of symbols

1-Net making machine 2-Knot forming part 7-Shuttle box 8-Shuttle 9-Main shaft 10-Cam 16-Upper hook 17-Yarn swing 18-Comb plate 19-Lifting plate 21-Lower hook A-Warp yarn B-Weft yarn C- Netting

Claims (3)

A net making machine equipped with an upper rod that rotates and swings back and forth, a yarn swing that guides the warp yarn and moves up and down, left and right, a lifting plate that raises the weft yarn, and a lower rod that pulls out the warp yarn from the loop formed on the upper rod The weft thread and the warp thread loop are formed on the upper collar, and the warp thread and weft thread loop is removed from the upper collar, and then the warp thread and weft thread loop is tightened by the stitch feeding operation of the stitch feeding roll to form a special knot network. In the net making method for making nets,
A net making method, wherein when the stitch feeding roll performs stitch feeding operation, a shuttle box containing the shuttle of the weft yarn is moved to the anti-nodule forming portion side, and the weft yarn is pulled to the anti-nodule forming portion side. A yarn swinger that moves up and down, left and right while guiding the warp yarn, an upper rod that is arranged above the knot forming portion and hooks the warp and weft to rotate and swing back and forth, and is installed below the knot forming portion. A comb plate having notches spaced at equal intervals to the weft yarn, a lifting plate disposed so as to move up and down to lift the weft yarn on the back of the comb plate, and entering the loop of the warp yarn and the weft yarn In a net making machine comprising:
A shuttle box in which a large number of shuttles containing the weft yarns are juxtaposed is arranged so as to be movable in the advancing and retreating direction with respect to the knot forming portion, and when the stitch feeding roll pulls the mesh to feed the stitches, the weft yarn A net making machine, characterized in that a movement drive mechanism is provided for moving the shuttle box so as to pull it toward the anti-nodule side.   Immediately before the upper plate raises the weft thread and the upper collar winds the weft thread, the shuttle box is moved to the anti-nodule forming portion side, the weft thread is pulled out from the shuttle, and the upper kite winds the weft thread. 2. The net making method according to claim 1, wherein the shuttle box is moved to the knot forming portion side and returned to the original position.

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