JP2665553B2 - Protection net and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Use The present invention relates to a method for driving trees, agricultural crops, buildings, and the like in strong winds, heavy rain,
The present invention relates to a protective net for protecting against hail, pests, birds, and the like, or a protective net for preventing a bow, a ball, and the like from flying outside at a bow field, a Japanese bow field, a golf practice range, a batting center, and the like.

(B) Problems to be solved by conventional technology and invention Conventionally, various nets, fabrics, knits,
Nonwoven fabrics and the like are used. Since the protective net needs to cover a tree, a sports playground, and the like, a large number of knitted fabrics and the like are used in connection.

As this communication means, a method of sewing an end of a knitted fabric or the like or a method of binding the end of a knitted fabric or the like with a metal fitting (a so-called stapler connection) is employed. But,
This method has a drawback that the connection portion is detached by the wind or the like because the strength of the connection portion is low.

For this reason, an end of the knitted fabric or the like is provided with a stopper, and the knitted fabric or the like is connected by tightening the stopper with a rope or the like. This connecting means is preferable because the connecting portion is less likely to come off than the connecting means described above. However, the eyelet is provided by providing a punched hole at the end of a knitted fabric or the like and attaching a metal fastener to the edge of the hole. Therefore, since the constituent yarn of the knitted fabric or the like is cut at the punched hole portion, when a high load is applied to the rope or the like, the metal fittings come off and the knitted fabric or the like may be torn from the punched hole portion. Was.

For this reason, there has been proposed a knitting structure in which the knitting structure itself is devised (fitting holes) by devising the knitting structure (Jpn.
No. 11195 and Japanese Utility Model Laid-Open No. 58-22996). This knitting structure is as shown in FIG. 3 and FIG. That is, in the knitting structure of FIG. 3, the insertion thread (4) is not passed between the adjacent chain knitting threads (5a) and (5b), thereby forming the fitting hole (1). In the present invention, a hole formed by a knitting structure, such as a stop hole (1), is referred to as an open stitch. The knitting structure of FIG. 7 is basically the same as the knitting structure of FIG. That is, the insertion yarn (4
By not passing through f), the holes (1a), (1
b) is formed. In the knitting structure shown in FIG. 7, the insertion yarn (4f) is located at the left and right sides of the fitting holes (1a) and (1b).
The book (six in total) is knitted by knitting on a chain knitting yarn, but in the course that forms the fitting holes (1a) and (1b),
The insertion yarn (4f) is knitted only on the left three chain knitting yarns and only on the right three chain knitting yarns. Therefore, the holes (1
a) and (1b), the insertion yarn (4
f) is not inserted. Note that the knitting structure shown in FIG. 7 is knitted by inserting two insertion yarns (4f).

However, when a rope or the like is inserted into the fitting holes (1), (1a), and (1b) as shown in FIGS. 3 and 7, and a high load is applied particularly in the vertical direction, the fitting hole (1). , (1
In the cases of a) and (1b), there were cases in which the inserted yarns spread vertically and cut in the upper and lower courses (particularly in the case of the knitting structure in FIG. 3). That is, the holes (1), (1a) and (1b) shown in FIGS. 3 and 7 have a drawback that they are insufficient in form stability and strength.

In view of this, the present invention knits open stitches (fitting holes) by further devising a knitting structure, whereby FIGS.
The purpose of the present invention is to provide a morphologically stable and superior strength in comparison with the stop hole shown in the figure. That is, an object of the present invention is to provide a protective net having such a suitable open stitch (fitting hole) and a manufacturing method thereof.

(C) Means and Examples for Solving the Problems The present invention relates to a plurality of chain knitting yarns arranged in a warp direction and an insertion inserted in a weft direction to connect the chain knitting yarns. A knitted yarn, wherein open stitches formed by knitting are provided at predetermined intervals in the vicinity of the edge of the Russell knitted fabric, and the open stitches are formed between adjacent chain stitch yarns. In at least one of three courses immediately before and immediately after the knitting of the open stitch, each of the adjacent chain knitting yarns is formed by not passing through the insertion yarn. The present invention relates to a protection net characterized by flying and crossing, and a method for manufacturing the same.

The Russell knitted fabric in the present invention is knitted by a plurality of chain knitting yarns arranged in the warp direction and an insertion yarn passed through in the weft direction and knitted on the chain knitting yarn.

Open stitches are provided at predetermined intervals near the edge of the Russell knitted fabric. The vicinity of the edge of the Russell knitted fabric may be near the edge of one side of the length of the Russell knitted fabric, or may be near the edges of both lengthwise knits. In addition, it is preferable to form open edges on each side of the vertical and horizontal directions, since they can be connected vertically and horizontally. The distance from the edge of the Russell knitted fabric to the center of the hole of the open stitch is determined as appropriate, but is preferably about 0.5 to 5 cm. Further, it is preferable that the interval between the open stitches is appropriately determined, for example, about 3 to 50 cm.

The open stitch referred to in the present invention is formed by knitting as a part of a Russell knitted fabric structure, and is formed by not passing an inserted yarn between predetermined courses and an adjacent chain knitting yarn in a Russell knit. It is. The features of the present invention are:
It exists in the knitting structure immediately before and immediately after forming the open stitch. That is, in at least one of the three courses immediately before and immediately after the knitting of the open stitch, each of the adjacent chain knitting yarns has a structure in which they fly right and left and intersect. By adopting such a knitting structure, in the upper and lower courses of the open stitch, the insertion yarn is reinforced by the chain knitting yarn, and the open stitch expands in the vertical direction and the insert yarn positioned in the upper and lower courses of the open stitch Can be prevented from being cut. If the chain stitches are not crossed in the upper and lower courses of the open stitch, the upper and lower stitches are formed only by the insertion yarn, which is insufficient in terms of form stability or strength. Therefore, the adjacent chain knitting yarns intersect with each other at the time immediately before and immediately after the knitting of the open stitch.
Most preferably done on course. However, it is not always necessary to perform it immediately before and immediately after, and it is sufficient to perform at least one of the three courses immediately before and immediately after the opening stitch is knitted. However, immediately before and after
It is not preferable that, for example, four courses before and after four courses are crossed without intersecting in the course, because the position of the intersecting structure and the upper and lower ends of the open stitch are too far apart, and the open stitch tends to spread in the vertical direction. The size of the open stitch is determined by the number of courses through which the insertion thread does not pass, but a size of 1 cm or more is usually adopted.

As the chain knitting yarn and the insertion yarn used in the present invention, a thermoplastic (heat-fusible) monofilament yarn or a multifilament yarn having an arbitrary thickness can be selected. However, the edges (approximately 2 cm wide) forming the open stitches are subjected to a considerably strong force by a rope or the like. Therefore, use a thread that is about 2 to 5 times thicker than the chain knitting yarn used for the central part of the protective net. Is preferred. It is also preferable that the knitting density be further increased in the edge portion.

Next, a protection net according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a protective net (2) provided with open stitches (1) at predetermined intervals near the edges of both vertical pieces of a Russell knitted fabric. The Russell knitted fabric structure at the open stitch (1) and the central portion (3) of the protective net is as shown in FIG. In this Russell knitted fabric structure, the open stitch (1) is formed by not passing the insertion yarn (4) between the adjacent chain knitting yarns (5a) and (5b) for seven courses. Then, in the three courses above and below the open stitch (1), the chain knitting yarns (5a), (5
b), (5c) and (5d) fly in the weft direction so that they intersect each other, forming a rhombic-like structure. More specifically, the chain knitting yarn (5c) jumps to the position of the chain knitting yarn (5b) three courses before the opening stitch (1) is formed, and the chain knitting yarn (5b) is similarly chain knitted. Fly to the position of the yarn (5c), the chain knitting yarn (5a) to the position of the chain knitting yarn (5d), and the chain knitting yarn (5d) to the chain knitting yarn (5a)
Fly to the position. At the position flew in the weft direction, that is, two courses before the open stitch (1) is formed, each chain knitting yarn (5
a), (5b), (5c) and (5d) are knitted by the insertion thread (4). In addition, the chain knitting yarn (5
(a), (5b), (5c), and (5d) return to their original positions one course before the open stitch (1) is formed. In this way, at least the adjacent chain stitch yarns (5a) and (5b) intersect at the upper and lower courses of the open stitch (1), and the upper and lower sides of the open stitch (1) have a rhombic-like structure, and the open stitch (1) ) Is achieved.

Further, the open stitch (1) can be formed with a Russell knitted fabric structure as shown in FIG. In the structure shown in FIG. 4, the structures of the open stitch (1), the central netting (3), and the ear from the open stitch (1) to the end are different. The part of the open stitch (1) is knitted by four chain knitting yarns (5a), (5b), (5c), and (5d). In the upper three courses of the open stitch (1), the chain knitting yarn (5a) It returns to the position of the chain knitting yarn (5d), and then returns to the original position, further returns to the position of the chain knitting yarn (5d), and then returns to the original position. At the lower end of the open stitch (1), the chain knitting yarn (5a) reciprocates between the position of the chain knitting yarn (5d) and the original position every other course. At the position of the open stitch (1), the chain stitch (5
a) travels in the meridional direction without shifting left and right. The chain knitting yarns (5b), (5c) and (5d) also progress in the warp direction with the same behavior as the chain knitting yarn (5a) as shown in FIG. In the part of the open stitch (1), the insertion yarn (4a) is a chain knitting yarn (5a),
The knitted yarn (4b) advances in the warp direction while being knitted on (5c), and the insertion yarn (4b) advances in the warp direction while being knitted on the chain knitting yarns (5b) and (5d). The insertion yarn (4c) is a chain knitting yarn (5a),
Knitted in (5b), (5c), and (5d), it travels in the warp direction while reciprocating between four wales. In the portion where the open stitch (1) is formed, the insertion yarn (4c) is connected to the chain knitting yarn (5
a) and (5c) are knitted only, and the insertion yarn (4c) does not connect the adjacent chain knitting yarns (5a) and (5b). As a result, the open stitch (1) is formed.

Center net fabric in Russell knitted fabric structure in Fig. 4 (3)
In the part, the chain knitting yarn (5) advances in the warp direction while moving to the adjacent wale position every three courses, and the insertion yarn (4)
Is knitted on one chain knitting yarn (5) over three courses, and the chain knitting yarn (5) moves to the right wale position. Knitted there, again over three courses into one chain knitting yarn (5). Then, the chain knitting yarn (5) is knitted on the second chain knitting yarn (5) to the right side on the course of moving to the left wale position, and proceeds in the warp direction by such knitting. The insertion yarn (4d) plays an important role in connecting the chain knitting yarn (5) in the weft direction in the central netting (3).
It progresses in the warp direction while being knitted on four chain knitting yarns (5) for each course. In addition, the structure of the ear portion is composed of chain knitting yarns (5) arranged in the warp direction and adjacent chain knitting yarns (5),
And (5) a knitted yarn (4).

FIG. 5 is a plan view of a protective net (2) in which an open stitch (1) is formed near the edge of each of the vertical and horizontal stitches.
The method for forming the open stitch (1) near the edge of the warp and weft is basically the same as described above, and the insertion yarn (4) is inserted between the adjacent chain knitting yarns (5) and (5). An open stitch (1) is formed by not passing through. Specifically, the sixth
It is obtained by knitting with a Russell knitted fabric structure as shown in FIGS. 6 and 8 show the structure of the portion A in FIG.

Fig. 6 shows four chain knitting yarns (5) above and below the open stitches (1a) and (1b), crossing left and right and flying in the weft direction to form a rhombic-like structure. The structure is the same as the structure shown in FIG. In the portion where the open stitches (1a) and (1b) are formed, there are four left and right open stitches (1a) and (1b) (total 8 stitches).
The insertion yarn (4e) which advances in the wale direction while being knitted on the chain knitting yarn (5) of the book) is inserted. The inserted yarn (4e) is a predetermined portion of the four left and right chain knitting yarns (5)
By being knitted only in the open stitch (1a), it is not inserted between two adjacent chain knitting yarns (5) and (5).
(1b) is formed. In the structure shown in FIG. 6, the open stitch (1a) formed on the warp uses one insertion thread (4e), and the open stitch (1b) formed on the weft is used.
Uses two insertion threads (4e) and (4e).

FIG. 8 shows a structure in which the chain knitting yarn (5) flies one waist to the left and right every predetermined course in the central knitted fabric portion, and the chain knitting yarn (5) is knitted without jumping left and right in the ear knitted fabric portion. Indicates that
It is basically the same as the organization shown in FIG. The insertion yarn (4g) at the portion where the open stitches (1a) and (1b) are formed is knitted to the two left and right (four in total) chain knitting yarns (5) of the open stitches (1a) and (1b). ing. Then, the insertion yarn (4g) is knitted at a predetermined portion on only one of the left and right chain knitting yarns (5), so that the insertion yarn (4g) is inserted between two adjacent chain knitting yarns (5) and (5). Not open stitch (1a), (1b)
Is formed. In the structure shown in FIG. 8, the open stitches (1a) and (1b) formed in the vertical and horizontal directions each use one insertion thread (4g).
In the portion (1b), only the two chain knitting yarns (5) in the left direction are woven.

The protective net (2) in which the open stitch (1) is formed near the edges of the warp and the horizontal as shown in FIG. 5 can be continuously produced by the following method, for example.
That is, by adopting a predetermined Russell knitting structure, a Russell knitted fabric as shown in FIG. 9 is obtained. This Russell knitted fabric knits open stitches (1a) at predetermined intervals near both edges of the width. Further, the open stitches (1b) are knitted at predetermined intervals over the width. The knitting of the open stitches (1a) and (1b) is formed by not passing the insertion yarn (4) between the adjacent chain knitting yarns (5) and (5) as described above. Thereafter, the open stitch (1) was formed near the edge of the vertical and horizontal sides by melting and cutting the space between the open stitches (1b) (BB line in FIG. 9) with a heating blade or the like. You can get a protective net. The chain knitting yarn (5) and the insertion yarn (4) are integrally melted and solidified at the weft edge of the protective net thus obtained, so that the insertion yarn and the like are less likely to fray from the edge.

(D) Test example A Russell knitted fabric was knitted with the Russell knit structure shown in FIG.
The types and knitting conditions of the yarns used are as follows.
The type of yarn is 1260d / 12 for chain knitting yarns from the end to the seventh yarn.
The polyester multifilament of 0F was used, and the other part (that is, the center part) of the chain knitting yarn used was 1260d / 120F × 2 polyester multifilaments. 12 for insertion thread
A 60d / 120F polyester multifilament was used.
Regarding the knitting conditions, the chain knitting yarns from the end to the 10th knitting yarn are arranged at a pitch of 10 / 3cm, and the chain knitting yarns at the center are 4 / knitting yarns.
The yarns were arranged at a pitch of 1.2 cm, and the inserted yarn was advanced in the wale direction at a pitch of 10 yarns / 3 cm.

In the Russell knitted fabric thus obtained, the stitches are small near the edge where the open stitches are formed, and the stitches are relatively large in the central portion in a mesh shape. The gap between the open stitches is 15-30cm, and the length of the holes in the open stitches is about
1.5 cm. When the open stitch is deformed into a substantially circular shape, the inner diameter is about 1 cm.

Insert the load meter rod into the open stitch of this Russell knitted fabric, and hold the place about 30 cm from the open stitch to the center, fix it with hardware, and gradually pull it, just before the knitted fabric around the open stitch is torn Was measured for tensile load. As a result, the tensile load was about 150 kg.

Also, since the stitches of the center raw knitted fabric are smaller than those of the nets usually used, they do not make a loud noise even when hit with a baseball or golf ball, and thus can be suitably used as a ball target. It was a good thing.

(E) Function and Effect of the Invention As described above, the protective net according to the present invention has an open stitch provided by knitting by devising a Russell knitted fabric structure near its edge. Therefore, since the hole for passing the connecting rope is provided without using a metal fitting as in the conventional protective net, the metal fitting does not come off. Also, unlike the staples in which the metal studs are attached to the punched holes, the open stitches can withstand a large tensile load because the constituent thread at the edge of the open stitch is not cut. Furthermore, when knitting the open stitch, adjacent chain stitches intersect in at least one of the three courses immediately before and immediately after the open stitch. Therefore, since the insertion yarns located above and below the open stitch are reinforced by the chain knitting yarn, the form stability of the open stitch is improved. That is, when the protective rope according to the present invention is used by inserting the connecting rope through the open stitch, a high load may be applied to the open stitch, and at this time, the open stitch may expand in the vertical direction. Alternatively, it is possible to prevent the insertion yarns located above and below the open stitch from being cut. Therefore, the protection net according to the present invention is less likely to be disconnected at the connection portion, and has an effect that the object to be protected can be effectively protected for a long period of time.

Further, according to the manufacturing method of claim (3), the protection net having the open stitches formed near the edges of the vertical and horizontal can be easily and continuously produced. Furthermore, in the protective net obtained by such a method, the chain knitting yarn and the insertion yarn are integrally melted and solidified at the edge of the weft, so that the protective net can be prevented from fraying from the edge. Is also played.

Furthermore, when the protective net is knitted with the organization shown in the drawing, the stitch at the center is smaller than that of a normal net used in a batting center or the like. It can be suitably used as a target of a ball or a golf ball.

[Brief description of the drawings]

FIG. 1 is a plan view of a protective net according to an example of the present invention, and FIG.
The figure is a diagram of a Russell knitted fabric structure of the protective net shown in FIG. 1, and FIG. 4 is a diagram of a Russell knitted fabric structure according to another example. FIG. 5 is a plan view of a protective net according to another example of the present invention, FIG. 6 is a Russell knitted fabric structure of a portion A of the protective net shown in FIG. 5, and FIG. 1 shows a diagram of a Russell knitted fabric structure. FIG. 9 shows a Russell knitted fabric structure obtained by one method of the present invention, and a protection net can be obtained by cutting along the line BB. The figures of the Russell knitted fabric shown in FIGS. 3 and 7 show the knitted fabric used in the conventional protective nets and the like. (1) Open stitch, (2) Protective net

Claims (3)

(57) [Claims] 1. A Russell knitted fabric knitted by a plurality of chain knitting yarns arranged in a warp direction, and an insertion yarn passed through in a weft direction to connect the chain knitting yarns, Open stitches formed by knitting near the edge of the Russell knitted fabric are provided at predetermined intervals, and the open stitches are formed by not passing an inserted yarn between adjacent chain stitches. And at least one of the three courses immediately before and immediately after the formation of the open stitch, each of the adjacent chain knitting yarns flies left and right and intersects. . 2. An open stitch is provided near the edges of both sides of the vertical and horizontal sides of the Russell knitted fabric.
The protective net described in the section. 3. Russell knitting is performed using a chain knitting yarn and an insertion yarn, and an insertion stitch is knitted at predetermined intervals near both edges of the width by not passing an insertion yarn between adjacent chain knitting yarns. Open stitches are knitted at predetermined intervals over the width, and in at least one of three courses immediately before and immediately after the knitting of these open stitches, the adjacent chain stitch yarns are skipped to the left and right to intersect. A method for manufacturing a protective net, comprising knitting while making a net, followed by melting and cutting in the width direction.