JPH0133583B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for tying fishing nets, and more particularly to a method for tying gill nets made of synthetic monofilament.

Various types of knot structures for fishing nets have been known. Among these, for example, one where the warp thread is wrapped around the upper hook once and the weft thread is pulled into the loop by turning the loop is a single-layered frogmata knot, and the warp thread is wrapped around the upper hook twice and the weft thread is pulled into the loop. The resulting one is called a double frogmata tubercle and is widespread.

For fishing nets that do not require strong knots, single knot knots have generally been used, and for fishing nets that require strong knots, such as gill nets, double knot knots have been used. However, even with double frog knots, the knots may shift under severe usage conditions, so stronger knots have been required.

Therefore, during the manufacturing process of single-layered Frogmata knots, the so-called "transformed Frogmata knots" were devised by winding or entangling the weft threads, and they became popular as knots for gillnet fishing nets that had strong knotting force and did not cause slippage. (See Special Publication No. 49-7098). however,
Even with this metamorphosed frog's crotch tuberosity, in locations with severe usage conditions, the tuberosity may become misaligned after several uses, making it impossible to use it for a long period of time. For this reason, there has been a demand for knots for fishing nets that have knots that are even tighter than before and that are less likely to slip off.

The knots of the present invention are stronger than conventional knot structures, do not loosen even when used underwater for long periods of time, and can be formed automatically in large quantities using a net making machine. The present invention provides a triple knotting method for fishing nets.

That is, in the method of the present invention, the upper hook, which is rotatable in the left or right direction, is actuated to hook the weft thread and the warp thread, in which one thread end is fixed and the other thread end is movable, and the upper hook is moved. Form two loops of the warp thread and one loop of the weft thread, pull out the movable end of the warp thread from inside the three loops, and insert the movable end of the weft thread into the third loop of the warp thread. After passing through the thread end, pull the movable end of the warp thread to pull out the third loop of the warp thread from within the three loops on the upper hook, and insert the weft thread inside these three loops. The movable side yarn end is pulled in, and a bent part of the weft yarn in which the movable side yarn end of the warp yarn is entangled is formed inside the three loops, and the movable side yarn end and fixed side yarn end of the warp yarn and weft yarn are intertwined. The method is characterized in that it consists of pulling and tightening.

According to the present invention, it is possible to obtain a triple knot that has a strong knotting force not seen in the past and can withstand long-term use. Further, according to the method of the present invention, it is possible to produce triple knots having the above-mentioned advantages by machine, and the method has the advantage that productivity can be increased by using a simple net-making machine.

Hereinafter, the method of the present invention will be explained based on the drawings.
In the following explanation, the term "loop" also means a bent shape similar to a loop formed by the thread, and the term "end of the thread" refers to the part of the thread that extends in all directions from the knot, not the cut end of the thread. shall mean.

FIG. 1 is a side view of a main part showing a knot forming part of a knitting machine for manufacturing the fishing net of the present invention. In the figure, a warp thread 1 is supplied from a bobbin (not shown) provided in the upper part, and the tip of the warp thread 1 passes through a comb 8 and is pulled out downward in the figure. Reference numeral 2 denotes a weft thread, which is stored in the coin coin 6, and its tip is pulled out and stretched downward in the figure through the comb 8 by the coin coin 6.

3 is an upper hook, which can be rotated counterclockwise and clockwise and tilted freely. The hook portion 3a of the upper hook 3 is provided to protrude approximately perpendicularly to the long axis of the upper hook 3.
A groove 3b is provided on the lower surface of a to allow a lower hook, which will be described later, to pass freely forward and backward (refer to FIG. 3 for 3a and 3b).

Reference numeral 4 has a boat shape for storing a coin 6, and a weft upper and lower arm 5 for guiding the weft 2 drawn out from the coin 6 to a comb 8 is provided at the tip of the boat shape 4. When the boat shape 4 swings up and down in the figure around the central axis, the weft thread upper and lower arms 5 swing up and down in the figure, and can pull up or lower the weft thread 2.

In the figure, 7 indicates a weft thread tension plow, and 8 indicates a comb. Further, 9 is a thread swinger which can move three-dimensionally and performs operations such as hooking the warp thread 1 on the upper hook 3 or hooking the warp thread 1 on the lower hook 11. 10 indicates a guide plate for the net.

Next, the process of forming knots using the knitting machine having the above configuration will be explained based on FIGS. 2A to 2L.

In the following examples, for convenience of explanation, the portions of the warp yarn 1 and the weft yarn 2 that are pulled downward through the comb 8 are referred to as fixed side yarn ends 1a and 2a, respectively, and are moved by the yarn swinger 9. The end of the warp thread 1 which is freely movable is defined as a movable side thread end 1b, and the end of the weft thread that is movable by the weft thread upper and lower arms 5 is defined as a movable side thread end 2b.

Step A: After removing the knot formed on the upper hook 3, when a new knot forming operation begins, the thread swinger 9 rises and pulls up the warp thread 1. Upper hook 3
2 shows a state in which the hook portion 3a protrudes toward the rear of the page.

B process: Upper hook 3 rotates 90 degrees to the left, and warp thread 1
to the front surface of the hook part 3a in the rotating direction, and
Start hooking up.

Step C: The upper hook 3 is further rotated 90 degrees, and the thread swinger 9 is lowered to hook the warp thread 1.

Step D: The upper hook 3 is further rotated by 90 degrees to form the first group 1C of the warp threads 1.

Step E: The upper hook 3 further rotates 90 degrees, and the thread swinger 9 rises again to pull up the warp thread 1.

F process: The upper hook 3 is further rotated by 90 degrees to hook part 3a.
Apply warp thread 1 to the front of the machine and start hooking warp thread 1 (same operation as step B). At this time, the movable yarn end 1b of the warp yarn crosses the fixed yarn end 1a at the front surface of the hook portion 3a.

G process: The upper hook 3 is further rotated by 90 degrees, and the thread swinger 9 descends to hook the warp thread 1. At the same time, boat type 4
The weft thread upper and lower arms 5 rise to pull up the weft thread 2.

H process: The upper hook 3 is further rotated 90 degrees, the thread swinger 9 is lowered, and the second loop 1d of the warp thread 1 is attached to the upper hook 3.
form. At the same time, the pulled-up weft thread 2 is applied to the front surface of the upper hook 3 in the rotating direction, and the weft thread 2 begins to be hooked.

Step I: After lowering the weft yarn upper and lower arms 5, the upper hook 3 is further rotated by 180 degrees to form a weft yarn loop 2c adjacent to the warp yarn first loop 1c and second warp yarn loop 1d.

Step J: The upper hook 3 is further rotated by 180 degrees, and the movable side yarn end 2b of the weft yarn intersects with the fixed side yarn end 2a at the bottom of the upper hook 3. Further, by this rotation, the movable side yarn end 1b of the warp yarn is pulled out from the back side to the front side of the fixed side yarn end 1a of the warp yarn and the fixed side yarn end 2a of the weft yarn. The lower hook 11 advances from the right side in the figure and approaches the upper hook 3.

K process: The first loop 1c and the second loop 1d of the warp thread 1 are attached to the upper hook 3, and the loop 2c of the weft thread 2 is attached to the upper hook 3.
In this state, the lower hook 11 is advanced from the right side in the figure and plunged into the groove (not shown) provided on the lower surface of the upper hook 3, and then the thread swinger 9
The movable side thread end 1b of the warp thread 1 is hooked onto the lower hook 11 by vertical, horizontal, front and back three-dimensional movements of the warp thread 1.

L process: The lower hook 11 moves back and pulls out the movable side yarn end 1d of the warp yarn 1 from among the three loops 1c, 1d, and 2c formed on the upper hook 3 to form the third loop 1e of the warp yarn 1. do. Pass the third loop 1e under the boat shape 4, and
d passes through the third loop 1e. The above L step will be explained in more detail. FIG. 3 shows a state in which the lower hook 11 is passed through the groove 3b formed on the lower surface of the hooking part 3a of the upper hook 3, and then the movable side yarn end 1b of the warp yarn is hooked and the lower hook 11 is retreated in the L process. FIG. 4 is a front perspective view showing the state, and FIG. 4 is a rear perspective view thereof.

In the figure, when the lower hook 11, which has hooked the movable yarn end 1b of the warp yarn, is retreated from the groove 3d, the warp yarn 1
After forming a winding part 1f surrounding the fixed side yarn end 1a of the warp yarn and the fixed side yarn end 2a of the weft yarn, A third loop 1e is formed. When the loop 1e is lowered and passes through a boat shape 4 (not shown), the movable side yarn end 2 of the weft yarn 2 is substantially removed.
b has passed through the third loop 1e. In this state, when the warp thread 1 is removed from the lower hook 11 and the movable end 1b of the warp thread 1 is pulled in the direction opposite to the supply direction of the warp thread 1 (to the left in the figure), the warp thread 1 at the knotted portion The weft threads 2 and weft threads 2 are arranged in a relationship as shown in FIGS. 5a and 5b. That is, the weft yarn 2 passes through the back surfaces of the fixed side yarn end 1a and the movable side yarn end 1b of the warp yarn, and passes through each loop 1 formed on the upper hook 3.
c, 1d and 1e while forming a U-shaped bend 2d. The movable side yarn end 1b of the warp yarn is pulled out into this bent portion 2d.

In this state, remove the knot from the upper hook 3, tighten the fixed side 1a and movable end 1b of the warp thread, and the fixed end 2a and movable end 2b of the weft thread in the directions of the arrows in the figure, and tighten the knot. Complete the formation.

To tighten the knot, the fixed side yarn end 1a of the warp yarn and the fixed side yarn end 2a of the weft yarn are rotated with a feed roller (not shown) and pulled in the direction of the arrow in the figure, and the warp yarn loop 1c and the weft yarn end are pulled in the direction of the arrow in the figure. This is done by tightening the yarn loop 2c, then pulling the movable yarn end 1b of the warp yarn using a tightening roller (not shown) and tightening the second loop 1d of the warp yarn. Figures 5c and 5d are front and rear views of the knot obtained by tightening.

The above method is one embodiment of the present invention, and as shown in FIGS. 6a, b, c, and d, first the first loop 1c of the warp thread is made on the upper hook, and then the weft thread 2 is made. Make a loop 2c of the weft thread, then hang the warp thread 1 to make a loop 1d of the warp thread, and then
It is also possible to draw the weft thread 2 into the individual loops 1c, 1d, and 2c, remove the loops from the upper hook, and tighten the knots in the same manner as in the embodiment described above, thereby creating a knot. It has the same effects as those of the example and is effective as a gill net fishing net.

The knotted gillnet fishing net of the present invention does not cause any turning, shifting, etc. compared to the conventional double frogfish fishing net or the modified frogfish knot fishing net with one loop each of warp thread and weft thread. The present invention has many advantages, such as being able to withstand long-term use because the state of the net knitted by the net-knitting machine is maintained indefinitely, which not only helps in resource conservation but also provides excellent fishing performance.

[Brief explanation of drawings]

Fig. 1 is a side view of the main parts of the net making machine used in the method of the present invention, Fig. 2 A to L are process explanatory diagrams showing one embodiment of the knotting method of the present invention, and Fig. 3 is a front view of the above L process. FIG. 4 is an enlarged perspective view of the L process seen from the back, FIG. C and D are front and back views of a nodule obtained by the method of FIG. 2, and FIGS. 6A and B are front and back exploded views of a nodule obtained by another method of the present invention. Figures 6C and 6D represent front and back views of the respective nodules. In the figure, 1...Warp thread, 1a...Fixed side thread end, 1
b...Movable side yarn end, 1c...First loop, 1d
...Second loop, 2...Weft thread, 2a...Fixed side thread end, 2b...Movable side thread end, 2c...Loop,
3... Upper hook, 4... Boat shape, 5... Weft thread upper and lower arms, 6... Bunsen, 11... Lower hook.

Claims (1)

[Claims] 1 A weft thread in which one end of the thread is fixed and the other end is movable in the vertical direction relative to the hook of the upper hook by rotating the upper hook that can freely rotate in the left or right direction. Hook the warp thread and form two loops of warp thread and one loop of weft thread on the upper hook, and rotate the upper hook so that the warp thread wraps around the bottom end of the upper hook of these three loops. After that, the movable side yarn of the warp yarn is pulled out through the inside of the three loops using the lower hook to form a third loop of the warp yarn, and the movable side yarn end of the weft yarn is inserted into the third loop. After passing through the boat shape holding the warp thread, pull the movable thread of the warp thread to pull out the third loop of the warp thread from within the three loops formed on the upper hook, and insert it into these three loops. The yarn on the movable side of the weft yarn is folded back and drawn into a double line shape, and a bent part of the double line weft yarn entwined with the yarn on the movable side of the warp yarn is formed inside the three loops, A triple knotting method for fishing nets, which comprises removing these loops from the upper hook and tightening the movable and fixed ends of the warp and weft threads.