JPH0367139B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hook for special knots that is used by being attached to a net making machine.

(Prior art) In general, in this type of hook, unlike single knots, frog knots, and double frog knots, warp and weft threads are hung to form both warp and weft loops, and the threads are passed through the loops and pulled. It has emerged as a special knotting hook that pulls out warp threads with a hook and passes them through a shuttle to form knots.

This known special knotting hook has the configuration shown in FIG. In this known makihaku,
The upper surface c and lower part d of the hook part b protruding from the base a of the winding hook are formed substantially parallel, and only the hook tip e extends upward at a steep angle.

With such a structure of the hook part b, the flat part of the upper surface c on which the warp threads f and the weft threads g are hung is wide, so that, as shown in FIGS. 2 to 5, for example, the thread swing h When the warp thread f is hung on the hook part b by the hook, and the winding hook is turned half a turn to the left and the weft thread g lifted by a lifting plate etc. When the winding hook is rotated half a turn to the right, it returns to its original position and comes to the position shown in FIGS. 4 and 5. At this time, when the tension of the warp threads f is weak or when the tension is appropriate, the warp threads are not pulled back, so that they take the position shown in FIG. 4 without slipping on the hook part b. When the tension of the warp thread f is stronger than the appropriate tension, the warp thread f and the weft thread g slide on the hook part due to the pulling back action of the warp thread hung on the hook part b, and are located on the side of the hook tip e. 5
As shown in the figure, the hanging position may be extremely different. Although the hanging position of the warp thread f and the weft thread g shown in Fig. 4 is a normal position considering the rotation of the winding hook,
The hooking position shown in FIG. 5 is an abnormal position as it is biased toward the hook tip e side. As mentioned above, this difference in position depends on the strength of the tension of each warp thread.In particular, the tension of the warp thread f is constantly acting in the direction of arrow i in the knitting process, and if the tension is strong, the hook It will be biased toward the e side.

This warp tension occurs when a large number of parallel warp threads are not drawn out evenly, and even if a warp thread payout adjustment device is installed, all the warp threads are There are many cases where the tension is not equal, and there are significant differences in tension in some areas. Therefore, depending on the strength of the warp tension, the position at which the warp is hooked and the position at which both loops are formed differ, and although some of the loops are corrected by the rotation of the winding hook, they still move due to the tension. Something remains that cannot be fixed.

When a fishing net is knitted in such a state, as shown in FIG. 6, there will be a portion j (row) where the positions of the loops, that is, the positions of the knots are not aligned. This uneven portion j occurs not only at the center of the net but also at the edge threads. In particular, the edge threads are better than the body threads (warp and weft).
Since the net is thick, the tension of the edge thread is strong, and when it is hung on a winding hook, it tends to be biased toward the hook tip e side, and the knots at the edge of the net tend to be irregular.

When a net knitted in this way is placed in the knitting direction shown by arrow k, the irregularities in the knots are not so noticeable, but if the net is stretched in the finishing direction shown in Figure 7, the net itself will not be able to catch the fish. The net may become loose or loose, resulting in a poor quality net. Generally, the net is not finished in the direction of the knitted net, but is finished in the direction perpendicular to the direction of the knitted net, and when the above-mentioned net fabric with irregular knots is stretched in the finishing direction shown by arrow l, the knots The parts j where the positions of the nets are not aligned appear to be extremely irregular, resulting in a defective net, especially as a gill net.

As mentioned above, in conventional makihaku, the formation positions of both warp and weft loops with respect to the makihaki are irregular, but this irregularity is difficult to detect at the knitting stage and is discovered at the finishing stage. As a result, the fabrics that have been subjected to a large number of unknitted fabrics are often all defective, resulting in extremely large economic losses.

(Object of the Invention) The present invention aims to eliminate the drawbacks of the conventional example described above, and its purpose is to ensure that the loops of the warp and weft threads hung on the winding hook are always formed at the same position regardless of the tension of the warp threads. The purpose of the present invention is to provide a special hook for knotting.

(Structure of the invention) The present invention has been made to achieve the above object,
A winding hook that hangs warp and weft threads to form both warp and weft loops, with the base of the hook aligned with the center of rotation of the winding hook and protruding approximately at right angles; When the height of is H and the length from the base of the hook to the tip of the hook is L, H:L≒1:
1.3, and the angle of inclination of the upper surface of the hook toward the hook tip is in the range of 15 to 22 degrees, and the hook is formed at the base of the upper surface of the hook. A special knotting hook that is further specified as having a flat part in the range of about 1/3 to 1 to 4 of the length from the base of the hook to the tip of the hook, and on which warp and weft threads can be hung. By forming a predetermined angle on the upper surface of the hook, the loops of the warp and weft threads are always located at the base of the hook, and even if there are differences in the tension of the warp threads, the loops are always formed at a constant position. , the nodules do not become irregular.

(Example) Next, the present invention will be explained in more detail with reference to the illustrated embodiments. First, in FIGS. 8 and 9, 1 indicates the entire winding hook, and the winding hook is attached to a knitting machine. A base portion 3 bent into a substantially dogleg shape with a hook portion formed at the bottom of the shaft 2 is integrally formed, and a hook portion 4 projecting laterally at a substantially right angle is integrally formed at the lower end of the base. has been done. The root position of the hook portion 4 relative to the base portion 3 is formed to coincide with the rotating shaft 5 of the winding hook 1. The reference numeral 6 is a hole through which the hook is inserted.

The present invention is characterized by the structure of the hook portion 4, and the structure of the hook portion is shown in FIG.
This will be explained using an example. The structure of the hook part 4 is that the base part 3
The upper surface 7 is provided with an upper surface 7 and a lower surface 8 on which warp and weft threads are hung.
A flat portion 9 in a specific range, which will be described later, is formed near the base of the hook portion.

The size of this hook is determined by setting the ratio of the length L from the base to the hook tip 10 to the height H of the base of the hook so that H:L≒1:1.3. The flat part 9 has a length of L1/3 to L1/4 with respect to the length L.
It has a length of . The upper surface 7 is the hook tip 1
It is formed with an uphill slope of approximately 20 degrees toward 0. In other words, the upper surface 7 of the hook portion 4, on which the warp and weft threads are hung, has an inclination angle θ of 20° toward the hook tip 10.

The hook portion 4 of the second embodiment shown in FIG.
and the length L from the base to the hook tip 10,
Similarly, H:L≒1:1.3, and instead of a flat portion, a concave curved surface 9a with a predetermined radius is formed near the root. The range of this concave curved surface is L1/4 for the length L
That's about it. The inclination angle θ ₁ of the upper surface 7 toward the hook tip 10 is 18°.30'.

Furthermore, in the hook portion 4 in the third embodiment shown in FIG. 12, the ratio of the length L from the root to the hook tip 10 to the height H of the root of the hook is H:L≒1:1.3.
The degree is the same as in each of the above embodiments. Then, the inclination angle θ ₂ of the upper surface 7 toward the hook tip 10 is
It is set to 15°.30′.

In any of the embodiments, the upper surface 7 is inclined at a predetermined angle, and this angle of inclination is within a range in which the warp and weft loops hung on the hook are not displaced by the tension of the warp, for example, a minimum of about 14 degrees. However, when considering certainty, a minimum angle of 15° is safe. or,
The maximum angle of inclination can be 25° or more, but when the warp and weft loops hung on the hook are removed from the hook at the time of tying, the entire winding hook should be turned so that the hook tip 10 faces downward. There is a step of inclining the hook, and in this step, the greater the inclination angle of the upper surface 7 of the hook, the greater the inclination of the hook as a whole must be.
Since this is not very desirable from the viewpoint of workability and the knotting process, the maximum angle of inclination of the upper surface 7 is preferably about 22 degrees in consideration of workability and the knotting process.

Furthermore, the fact that we determined the ratio between the height H of the base of the hook and the length L from the base to the tip of the hook is related to the thickness of the warp and weft used in the knitting yarn. As the size of the hook increases, the hook also becomes larger, and the hikibari also becomes larger, resulting in a larger makibari as a whole. Even in such a case, by maintaining the above-mentioned ratio as a whole, the warp and weft loops can be formed quickly and a good knot can be obtained.

(Function) The actual use of the winding hook according to the present invention configured as described above will be explained with reference to FIGS. Multiply by rotating half a turn in the direction. In this case, the warp threads 11 are hung on the side of the hook tip 10, but due to the tension of the warp threads and the rotation of the winding hook, the warp threads slide on the inclined surface of the upper surface 7 of the hook portion and reach the base of the hook portion (FIG. 14). At the same time as this half rotation to the left, the thread swing 12 is lowered or the weft thread 1 is lowered as it is.
3 is lifted by a lifting plate or the like before rotation, and when the hook tip 10 of the hook portion faces the weft side, the lifting plate is lowered, the weft thread 13 is hooked onto the hook portion 4, and the winding hook is half-turned to the right. When it is rotated and returned to its original position, the weft thread 13 also slides along the inclined surface of the upper surface 7 and is located on the base side of the hook portion. At this time, even if the tension of the warp yarns 11 is strong, the warp yarns 11 do not run up the slope of the upper surface 7, but are neatly positioned together with the weft yarns 13 on the root side, that is, on the flat surface 9, where the warp yarns and weft yarns form a loop. is formed.
In other words, regardless of the strength of the tension of the warp threads 11 themselves,
A loop of the warp and weft threads can always be formed at a certain position on the hook. Note that the above explanation is based on the first
Although this was carried out using the example, since the upper surface of the hook part is inclined also in the second example and the third example,
There is no change in the fact that warp and weft loops are formed on the root side.

(Effects of the Invention) As explained above, the special knotting hook according to the present invention has a predetermined inclination angle on the upper surface of the hook part on which the warp and weft threads are hung, so that the loops of the warp and weft threads can be attached to the hook part. These loops are formed in a concentrated manner at the base, and even if the tension of the warp yarns in which these two loops are parallel is variable, they are always formed at a fixed position, so the threads between the nodes are evenly distributed. This eliminates irregularities in the arrangement of the knots in the knitted net fabric, further improving the knitting work, and produces an excellent effect in that the net fabric with uniform mesh can be knitted without producing defective products.

In addition, the special hook for knotting of the present invention can be made by specifying the ratio of the height of the root of the hook protruding in the right angle direction and the length to the tip of the hook, as well as specifying the inclination angle of the upper surface of the hook. Since the upper surface of the hook becomes a sloping straight line from the base of the hook toward the tip, it is easy to remove the warp and weft loops at the time of knotting, and it is easy to remove both loops at the same time. This leads to the excellent effect that the knots are intertwined in an orderly manner and the stitching can be done evenly, which also makes it possible to knit a net fabric with an even mesh because the threads between the knots are even.

[Brief explanation of drawings]

In the accompanying drawings, Figures 1 to 7 show a conventional example, where Figure 1 is a side view showing only the main parts of the conventional winding hook, and Figure 2 is a side view showing only the main parts of the winding hook of the conventional example. Figure 3 is a side view of the main part showing the state in which the warp is hung, Figure 3 is a side view of the main part showing the state in which the weft is hung on the hook of the same winding hook, Figure 4
The figure is a side view of the main part when the warp and weft are hung on the hook of the same winding hook, and the tension of the warp is weak. Figure 5 is a side view of the main part when the warp and weft are also hung, and the tension of the warp is strong. Fig. 6 is a partial plan view of a conventional net fabric knitted with a winding hook, expanded in the same direction as the knitting, and Fig. 7 is a partial plan view of the same fabric knitted with a conventional wind hook and expanded in the finishing direction. Floor plan, No. 8
15 to 15 show embodiments of the present invention, in which FIG. 8 is a front view of the special knotting hook according to the present invention, FIG. 9 is a side view of the same hook, and FIG. 10 11 is an enlarged side view of the first embodiment of the hook in the hook of the same volume, FIG. 11 is an enlarged side view of the second embodiment of the hook, and FIG. 12 is a third embodiment of the hook. FIG. 13 is an enlarged side view showing a state in which warp threads are hung on the hook portion of the first embodiment, FIG. 14 is an enlarged side view showing a state in which weft threads are hung on the hook portion of the first embodiment, and FIG.
The figure is an enlarged side view of a state in which the warp and weft threads are applied to the hook portion and the winding hook is rotated back to its original position. 1... Winding hook, 2... Shaft, 3... Base, 4... Hook, 5... Rotating shaft, 6... Insertion hole, 7... Top surface,
8... Bottom surface, 9, 9a... Flat part, 10... Hook tip, 11... Warp, 12... Thread swing, 13... Weft.

Claims (1)

[Scope of Claims] 1. A winding hook that hangs a warp thread and a weft thread to form both loops of warp threads and weft threads, wherein the base of the hook portion is aligned with the center of rotation of the winding hook and protrudes in a substantially perpendicular direction. When the height of the base of the hook is H and the length from the base of the hook to the tip of the hook is L, H:L≒
1:1.3, and the angle of inclination of the upper surface of the hook toward the tip of the hook is in the range of 15 to 22 degrees. 2. The special device according to item 1 above, characterized in that a flat portion is formed at the base of the upper surface of the hook in a range of about 1/3 to 1/4 of the length from the base of the hook to the tip of the hook. A hook for knots.