JP4764096B2 - Agricultural insect repellent and bird net with high crop protection and workability - Google Patents

Description

  The present invention relates to insect repellents and bird nets which are less likely to damage crops, insects or birds, and which are easy to deploy and detach and to be used on agricultural supports. Is

  Anti-insects for agricultural products such as vegetables and fruits, bird-proof nets, ie, fences and pillars with pillars, trees themselves or beams, etc. Crop damage is caused by the air gap (light shielding rate of 30% or less), so the gap between the constituent yarns is large, and the net leans on the crop and contacts the net constituent yarn part due to the growth of the crop. Is a concern. In particular, in the case where the tree itself is used as a support, and the tree is hung and extended, the possibility of contact with the crop or the tree increases, so a precaution is required. In addition, as long as it is basically an agricultural net, it should be required not to damage crops and to damage insects and birds.

However, there is no conventional product that satisfies this requirement, and in patents and utility model publications that have been published, applications such as light reflection, fluorescence, fragrance, insects by taste, and bird repellent effects are utilized. Many techniques have been proposed to prevent insects and birds from flying as described below, but they require chemical processing, pasting, etc., are not economical, and damage is caused when the net itself comes into contact with crops. No technology is considered. For example, Japanese Utility Model Laid-Open No. 61-2042, Japanese Utility Model Laid-Open No. 5-48686, Japanese Patent Application Laid-Open No. 9-21047, Japanese Patent Application Laid-Open No. 9-300505, Japanese Patent Application Laid-Open No. 2000-166456, Japanese Patent Application Laid-Open No. 2000-217497, and Utility Model Registration No. 3046247.
In addition, the weaving method has a poor cushioning property, and is far from being a place that does not damage crops, insects and birds. For example, JP-A-9-275881, Utility Model Registration No. 3043378, JP-A-10-44273, JP-A-2001-251976, JP-A-2001-352844, Registered Utility Model No. 3046247.

  In addition, the knitting method does not show any technology that does not damage the crops. From the contents described, there is a high risk of damage to the agricultural products, and it can be folded. Etc. are not easy to handle. For example, JP-A-1-104118 and JP-A-2003-328257.

  Basically, these nets should be easy to handle for the users, even more so in the aging and part-time work of farmers, and the farmland called Itsubo Farm is a section. It is also necessary to work without entering other people's premises as much as possible. In addition, it is desirable that even an amateur or anyone of any age or sex can easily work. However, there is no conventional product or known technology that can satisfy this requirement, and it is at most easy to attach to a column, etc., and consideration is given to making it easy for both men and women to work alone. It's not what has been done. For example, JP 2002-339207 A.

Agricultural nets have traditionally been wrapped around a wide roll with the width of the original fabric or folded up without rolling up a wide vertical and horizontal net, making it difficult for anyone alone to expand. It was. In other words, even if the field surrounded by the net is leveled, the ground outside the net is narrow or inclined, making it unstable as a scaffold, and it is difficult to spread the net on the ground. However, there is no technology on how to do this.
Japanese Utility Model Publication No. 61-2042 Japanese Utility Model Publication No. 5-48686 Japanese Patent Laid-Open No. 9-21047 JP-A-9-300505 JP 2000-166456 A JP 2000-217497 A Utility Model Registration No. 3046247 Japanese Patent Laid-Open No. 9-275881 Utility Model Registration No. 3043378 JP-A-10-44273 JP 2001-251976 A JP 2001-352844 A JP-A-1-104118 JP 2003-328257 A JP 2002-339207 A

  The problem to be solved is that there is a high risk of damage to crops by the net itself, the net is not easy for anyone or alone, and the outside of the net is narrow or inclined. This is not a consideration for workability.

  The agricultural insect repellent and bird net of the present invention are composed of struts composed of knitted fabrics having a large gap between yarns knitted by connecting warps in which the loops are connected in a chain in the warp direction with wefts in a non-loop state in the weft direction The net is a tape yarn in which the weft is a flat flat yarn. It should be noted that the term “expanding on a column” includes not only tying it to a column or a tree that is an alternative to the column, but also spreading it and spreading it, and also extending it by tying it somewhere via a rope. In short, it means to hang it by hanging it somewhere without placing it on the ground.

Moreover, also characterized in that the warp threads also a tape yarn.

Furthermore, the width across or proximity thereof of the net, also characterized in that the flat tape yarn is inserted as a link in the warp direction.

The invention of claim 2 is characterized in that one or more of the strings are inserted in the warp direction which is not at both ends.

In addition to these features, it becomes easier to develop the two strings inserted at both ends of the width of the net or in the vicinity thereof when the other portions are in different colors.

In addition to these features, it is easier to lay a net with marks at predetermined intervals in the warp direction of the net.

The invention according to claim 3 is characterized in that the wide original fabric of the net is folded in the weft direction and wound around a winding roll narrower than the original original fabric width.

In addition to the invention of claim 3, when the roll width of the winding roll is 200 to 250 mm, it is further easily developed .

  By making the tape yarn a weft that joins the warp while maintaining a flat flat yarn, the thin foldable portions made of flat yarn join the rows of loop-shaped three-dimensional portions that are banded in the warp direction. It is easy to fold flatly by folding at the flat yarn part, it is possible to wrap the net around a roll with a width of a fraction of the net width, it is possible to fold narrowly, and thin flat yarn can be folded Even if it is rare, it can be easily deployed without leaving a crease, so it can be rolled around a roll with a width of a fraction of the net width, or it can be folded into a fraction of the net width. Because it is not necessary to spread it on the ground when removing or removing it from a stand on the farmland, and it is possible or easy to rewind it to the roll and to fold it when removing it. , Floor So that can work without using too much a location other than the earth, or the work is enhanced. Therefore, when it is desired to effectively use a limited site as an agricultural field, when the surrounding area is a non-development site such as an inclined land, the utility value is high in terms of effective use of the site and work safety. This is particularly significant when there is a high possibility that a person will be directly adjacent to another person's farmland and enter another land to damage another person's crops, such as a kitchen garden where a section is finely divided. Furthermore, since the removal workability is improved, the work time can be shortened.

  In addition, the tape yarn is thinner and easier to bend and stretch compared to non-flat monofilaments and multifilaments other than tape yarn. In addition, cushioning is increased to reduce and prevent damage to crops.

  In addition, the width of the tape yarn is easier to catch the eyes of insects and birds than the narrow non-flat monofilament thread, and the width, thinness, and flexibility of the tape yarn are also reduced in weight per area subjected to wind. As a result, the ease of shaking by the wind increases, so that it becomes easier to catch the eyes of birds and insects, and the avoidance of collision between insects and birds is evoked.

  Furthermore, since the warp yarn is also a tape yarn, the loop portion becomes flexible in the contact direction because the tape is easily bent due to thinning, and the contact with the crop is softened. Is wider than non-flat monofilaments and the like, making it more noticeable and facilitating the avoidance of bird and insect collisions.

  For the same reason, it becomes easier to break between the loops of the chain in the warp direction, the net as a whole becomes weaker, the cushioning property is further improved, and the effect of preventing or reducing crop damage is increased. become.

  Further, when the net is wound around the roll, it becomes easy to wind by being flexible in the warp direction, and further, it is easy to fold when folded without being rewound onto the roll, and workability and space saving at the time of removal are increased. In short, since it becomes softer, it becomes easier to handle during the initial and re-expansion.

  When the weft tape yarn is in the width direction perpendicular to the flow of the net, if there is a twist to the extent that the twist is generated by releasing the winding from the net bobbin winding bobbin at the time of net manufacture, The reflection direction of the film is not constant and slightly twisted, which makes it easier for birds and insects to see the reflected light than when the film surface is facing directly in front of the film, and will provoke collision avoidance to the net. . At this time, if the twist is too large, the tape yarn that is sleeping when viewed from the front of the net will stand up, so the ratio of the light reflection direction to the front of the net will decrease, and insects and birds The alerting effect will be lost. Furthermore, the greater the twisted twist, the closer to the twisted string, and the ease of bending in the weft direction will be hindered, which deviates from the object of the invention. That is, it is desirable that the twist is within 90 degrees per unit length of the weft connecting the warps.

  For the sake of easy handling of the net, there have been conventional ropes with multi-filaments or the like inserted as strings on both ends of the net width. However, replacing the rope with a flat tape yarn greatly increases the thickness after insertion. This is not a hindrance when folding the net in the width direction, and also when compared to thick non-flat multifilaments and monofilaments when the net is folded in the length direction, that is, the warp direction. Since it is easy to bend, it becomes difficult to become an obstacle when folding the net.

In addition, since the rigidity is reduced compared to monofilament or multifilament, it becomes easier to bend and fold in the thickness direction, and when tying or tying the ends of the strings themselves, the multifilament or monofilament Easier to work with than
In addition, the tape yarn itself folded flat in the width direction is used as a rope replacement, but the rigidity increase due to the increase in its thickness is also less rigid than monofilaments and multifilaments of the same decitex. It does not detract from the work of winding, folding, or tying up the net.

Tape yarns used as an alternative to insertion ropes reduce transparency between folded layers and increase whiteness due to diffused reflection of light, so folded strings are generally not multilayer tape yarns or monofilaments Compared with, it increases the light reflectivity, making it easier to stand out against insects and birds. In multifilaments, multilayering between filaments occurs, so the light reflectivity improves, but the layers are tightly twisted and tightened to form a rope, and how the irregular reflection between each layer occurs As a rope, the increase in diffused light reflection as a rope is considerably inferior to that obtained by folding a tape yarn. In addition, it is more conspicuous when the insects and birds are on the front side of the net when the tape yarn is folded into a square shape than the monofilament or multifilament shape. Needless to say.
Needless to say, a folded tape yarn is more conspicuous than a monofilament having an irregular cross section.
Furthermore, it goes without saying that even when colored, the relative light reflectivity compared to each thread shape does not change.

  If more than one flat string is added and inserted in the longitudinal direction, which is not at both ends, for example, when the net is stretched vertically in the direction of the net flow in the insect-proof and bird-proof area, the net is set to a constant height in the horizontal direction. If there is a horizontal bar that ties the struts for laying, if the string is abutted along the horizontal bar, the horizontal bar will be firmly abutted on the surface so that a flat tape yarn wraps, The net is easy to lay because it does not shift because it only touches a line like a rope of another shape.

  Also, when trying to lay a net on a semi-cylindrical dome with an arch-shaped support, if a flat string part is made to straddle along the ridge line of the dome, the surface corresponding to the tape width is placed on the arch apex of the support. Because it makes a firm contact, it is easy to lay the net without slipping off and slipping easily because it touches only at the point of the ridgeline of the circular cross section such as non-flat monofilament and multifilament. Become.

  If both ends of the width of the net are different from each other, and the left and right colors are different from each other, when opening from the winding roll or from a simple bundle, it is easy to distinguish the top and bottom or both ends left and right when laying, Deployment and laying operations are facilitated.

If each tape yarn is stretched to increase the crystallinity, the tensile strength will increase, and the slip will be better than that of the lower crystallinity, especially between the insertion string and the net. When the net is squeezed by pulling the insertion string, or when the net is suspended by hooking both ends of the insertion string at one end, it is easy to open and close the curtain.
Furthermore, the bending elastic modulus increases due to stretching and it becomes difficult to bend. However, when the same decitex and the same stretching ratio are used, the tape yarn is more easily bent than the non-flat monofilament, and the net laying becomes difficult. In addition, the cushioning properties are not greatly impaired, and the risk of damage to crops does not increase.

  In addition, the ease of bending of this tape yarn is easier to bundle and bind compared to non-flat monofilaments, multifilaments and twisted strings when bundling at the end of the net or tied using an insertion string. Convenient.

  Further, since the reflectivity of light is increased by increasing the crystallinity, it becomes easily noticeable by insects and birds, and the aluminum vapor deposition processing and the blending of metal pigments as in the prior art are not necessary.

In addition, since the increase in crystallinity due to stretching is accompanied by an increase in orientation, it becomes easier to fold the tape yarn in the width direction. Since the folded corners of each layer have almost no round-shaped bulge due to repulsion due to the rigidity like a monofilament, the thickness of the folded layers does not increase specially, and string insertion is easy. As a result, it becomes possible to insert a tape in a more multilayered form, which contributes to an increase in the light reflection effect related to the number of layers.
In addition, since the light reflectivity is increased by extending the crystallinity, it goes without saying that the conspicuousness to insects and birds increases.

  If you want to mark the net at a predetermined interval in the net warp direction, tie the column and the column, such as by setting the column to the same predetermined interval, so that the tension is not disturbed by the slack of the net. Can be laid. Or it can be installed on a farm while measuring the dimensions. Examples of the method of applying a mark include insertion of other color yarns, insertion of printing yarns, or processing such as printing on a net, and a method of inserting a structure serving as a mark for each pitch.

  Nets that connect warps with loops connected in a chain in the warp direction with wefts that are in a non-loop state are three-dimensional, so it is usually difficult to fold, or it is folded and wound around a roll Never seen. Also, there are no small folded items. Some rolls are unfolded and wound on a roll, but unfolding the net from a roll of height or wider is a different application from the present invention, such as when laying the ground. It is obvious that it is not easy to roll it sideways in a vertical standing direction, without knowing the rolling development. Because it is impossible to have both ends of a roll that is more than the height alone because it is out of reach, even if it is shorter than the height, if it is close to the height, the face will be attached to the roll and it will be difficult to handle the roll. is there.

  The net of the present invention is a tape yarn in which the weft is a flat flat yarn, so that it is easy to fold in the net width direction, i.e., the weft direction, from the ease of folding the tape yarn portion repeatedly described above. It is possible to wind around a roll that has never been used before. Also, it can be folded small. Therefore, roll winding with a narrow width, expansion from the roll, further rewinding, or small folding, expansion from the folded product, and further refolding are possible. These means that work in a small place becomes easy.

  If the net is folded in the width direction, that is, in the weft direction, and is wound around a winding roll narrower than the original width, for example, the width of the roll around which the net is wound If the height of the buttock is about the height of the shoulder, turn the roll by placing the roll up and down, placing the lower end of the roll against the ground, pressing the upper end of the roll below the shoulder position or the height of the buttock, and pressing with the palm. This makes it easier to deploy the Internet and improves the workability of one person. Alternatively, it is possible to develop the net with both hands holding both ends of the roll.

  Furthermore, if you want the ease of network expansion, the width of the roll around the net should be set so that it is reasonable for handling the roll. If the net is to be extended, the roll width is suitably 150 to 300 mm, and preferably 200 to 250 mm.

  This is because the roll is most tired when the upper arm is placed against the side of the abdomen, that is, the arm is held tight, and the upper arm is not tired when the wrist side is slightly narrower than the elbow. Furthermore, the hand is tired if the instep is on the almost extension line of the upper arm line, and if the hand is held in such a way that the wrist is opened outward, the hand is tired. If the fingers are bent inwardly at the second joint and / or the third joint and the winding roll of the net uses a tubular core such as a paper tube, the fingers are inserted into the tube, It is better to hold the palm and fingers at the intersection of the abdomen against the inner corner of the core. This is because the roll around the net is not disturbed and can be controlled.

  Assuming that the roll width for this purpose can be used by young and old men and women other than infants and infants, 150 to 300 mm is the best, and 200 to 250 mm is most suitable. And if this roll width and weight is about 2m, the net will be 2m wide and 2m wide, so if you hold the roll in the waist or chest position, the net from the roll will be in the middle of the net width of 2m. Since it will unfold, it will be easy to spread without distortion in the net sticking condition, work will not be tired, it will be easy, and work time will be shortened.

Embodiments of the present invention will be described below with reference to the drawings.
The material of the warp and the weft used in the present invention may be anything as long as it is a synthetic resin. However, the soft material is preferred because it is soft against the crops, insects and birds that are the object of the present invention. From the viewpoint of including the surface, polyethylene or polypropylene is suitable, and in order to obtain the required strength in that case, a stretched one is preferable. The manufacturing method may be any method such as a T-die method, but since fine dimensional accuracy is not required, a product that is formed into a film by the inflation method and divided in the vertical direction may be inexpensive.

  In order to make a net, it is appropriate to use an existing warp knitting machine, particularly a Russell knitting machine.

  FIG. 1 is an expanded view of a net 1 according to an embodiment of the present invention. A knitted fabric knitted by connecting warps 2 having loops connected in a chain in the warp direction with wefts 3 in a non-loop state in the weft direction, and cords 4-1 and 4-2 are inserted at both ends in the width direction. ing. The knitting body and the two strings have different colors. Each material is high-density polyethylene, and is formed and stretched by an inflation method and broken into yarns, and is colored light green.

  The net fabric has a width of 2 m, a length of 18 m, and a body weight of 400 g. The weight of the wrapped paper tube is 520 g.

FIG. 2 is an enlarged view of the structure so that the relationship between the warp and weft of the net in FIG. 1 can be easily understood.
Each thread except the string uses a common thread with a thread width of 1 mm and a thickness of 0.025 mm.
The eyes have a lattice shape with a Russell net, and the pitch is 20 mm. The number of loops within one pitch is six.
Also, the strings on both ends have the same thickness of 0.025 mm, but the one with a width of 35 mm is folded to a width of 5 to 7 mm and a thickness of 0.2 to 0.16 mm. The other string is colorless but folded and looks white.

FIG. 3 is a schematic diagram illustrating how to open a net wound around a paper tube winding roll. A net of 2 m width is folded with weft, and adjacent loop rows are shifted in the roll width direction without overlapping in the roll thickness direction, so that the bundle is converged to a width of about 35 mm and a thickness of about 4 mm. It is wound around a roll so as to be shifted in parallel so as to partially overlap with a matching bundle.
Using almost the full width of the roll width of 230 mm, approximately 9 bundles are arranged in a row, and the bundles are wound on the row in the same manner. A paper tube having an outer diameter of 80 mm and a net with a length of 2 m and a length of 18 m was about 140 mm in outer diameter.

Experiments 1 and 2 were conducted as Examples 1 and 2 using the net shown in FIGS.
Experiment 1 will be described. As Comparative Example 1, a commercially available bird-proof net, which is a monofilament for both warp and weft, which is the most common conventional technique among bird-proof nets, was used. The yarn diameter is 0.25 mm, the knot pitch is 45 mm, the knot net called a cocoon net is knitted, and the shape in the radial direction is a diamond shape. The material is polyethylene. The tissue part is shown in FIG.

  As a comparative example 2, a warp and weft are both monofilaments of polyethylene, a thread diameter of 0.25 mm, a lattice shape of a Russell net, a pitch of 16 mm for both the weft and a warp, and a net having 8 loops in one warp pitch. Using. The tissue part is shown in FIG.

  Each example was cut into 300 mm × 300 mm, and as shown in FIG. 6, stretched on a frame of 200 mm × 200 mm, placed one peach (250 g) on the net, and allowed to stand. The presence or absence of peach damage was confirmed. The results are shown in Table 1.

  What was put on the net | network of the comparative example 1 had the 45-mm square square thin linear trace, and was the same as the pattern of the eyes of a net | network. The one placed on the net of Comparative Example 2 has a linear trace similar to the Arabic numeral 7, and is composed of a length of 5 mm in the left vertical direction, a length of 16 mm in the upper horizontal direction, and a length of 32 mm in the right vertical direction. There was a line mark similar to the Arabic numeral 7. The 32 mm long marks were thick and dark.

  On the other hand, what was placed on the net of Example 1 appeared to have a mesh when it was lowered from the net, but it was immediately unknown and no trace was found even when searched. From the above results, it is proved that monofilament yarn has a risk of being damaged by contact with crops, and that this risk can be reduced by replacing it with a tape yarn that is a flat flat yarn. did it.

Next, Experiment 2 will be described. Using the nets of Example 2, Comparative Example 3 and Comparative Example 4 to be described below in the field of 18 m around the field shown in FIG. The nets of the three examples are both 2 m wide and 18 m long, and ropes or flat yarn strings are inserted at both ends in the width direction.
The thing of Example 2 is the same as that of Example 1 in Experiment 1, and the thing of Comparative Example 3 is also the same as that of Comparative Example 1 in Experiment 1.
The net of Comparative Example 4 is a commercially available net, and both warp and weft are monofilaments of polyethylene, have a thread diameter of 0.25 mm, and a lattice shape of a Russell net. Is 3. The organization is shown in FIG.
In addition, each net | network is before use, and the net | network of Example 2 is wound by the roll as above-mentioned, but the comparative example 3 is bundled and the comparative example 4 is folded.

  Explain where to conduct the experiment. As shown in FIG. 6, this is a place where a total of 8 pillars having a height of 2 m above the ground are set up, with four in the corner and four in the middle so as to divide the field into 4.5 m square.

  Next, the work procedure will be described. First, a wound or folded net is placed on the ground, and two strings at both ends of the net width are pulled out slightly. Then, one string is tied to one top portion of eight pillars of 2 m height set in advance, and the other string is tied to the bottom portion near the ground. Next, the net is extended around the outside of the frame surrounded by the columns. Each strut and net are tied to the top and bottom of the strut with other strings. The strut that tied the net first is the same as the strut that was tied last, and two strings at both ends of the net width are bound to this strut, but another string is also bound between the struts. In this experiment, the extension to the ceiling of 4.5m square was omitted.

  The range of each work time measured is as follows. The time required for the stretch is from when the hand is touched to find both ends of the net placed on the ground to when it is tied to the net and support.

  Next, remove each string from the net that is stretched and tied to the support, and then remove the net from the support and put it in a bag or fold it back, that is, hold the hand on the extended net to remove the string. The time required for collection is from the time of touching to the time of unwinding and storing in a bag, or folding.

In Example 2, the experiment for carrying out the bag without rewinding the original paper tube was performed for the following reason. In other words, it is impractical to store paper tubes that have been emptied after being stretched for use in fields for more than a few months. Throw away them and replace them when necessary. If it's not workable and bulky, it's natural.
Further, the reason why Comparative Examples 3 and 4 were not put into the bag as in Example 2 was as follows. Comparative Example 3 is easy to put in a bag, but if you try to take it out for re-expansion if you don't put it together, such as putting it together, it will take time and it will be difficult to catch the beginning, and Comparative Example 4 will take you to put it in a bag This is because it is very hard to fold and repels, jumps out of the bag, and does not enter the bag unless it is folded. That is, extra time is required for bagging.

  After the collection, it is re-extension that the same worker performs the above-mentioned net extension work again.

  Further, thereafter, the same worker who performs the same collection operation as described above is referred to as “re-collection”.

  Each work was performed by worker A and then worker B.

  The results are shown in Table 2. Compared to Comparative Example 3 and Comparative Example 4, it can be seen that Example 2 requires less time for both expansion and recovery.

The entire work was analyzed in detail to determine which part of the work this difference is.
There is a difference in the work as a whole during the extension. The difference between Example 2 and Comparative Example 3 is particularly large, and it can be seen that Comparative Example 3 takes two to three times as long as Example 2. In other words, in Example 2, it is shortened to one-half to one-third of Comparative Example 3. Further, the time is shortened by 17 to 42% with respect to Comparative Example 4.

  As for the extension work, it was difficult to divide the required time for each fine work. Therefore, if the difference in the sensory required time received by the worker and the possible causes for the difference are organized, Comparative Example 3 is a network. It took time to solve the problem, and Comparative Example 4 was relatively heavy and bulky, so it could not be held lightly and turned around, but once spread on the ground, stretched around and stretched So, it took time, and it took a lot of work time, especially because the rigid weft that was bent and brazed by folding it took force and time to return it to its original state. It is.

  On the other hand, in Example 2, the two strings are tied to the top and bottom of the column, and the net is not lowered to the ground, and after going around the circumference, one end in the weft direction is tied to the top of each column, and the other end Because it was done by tying to the bottom side of each column, it did not take time. At this time, strings of different colors were inserted at both ends of the width, so it was easy to open and tie to the column without making a mistake.

At the time of collection, it was possible to measure separately the work of removing the net from the support and the work of folding the net together. Compared with the other examples, Comparative Example 3 does not take time to fold up, but takes time to remove, and takes time for the next expansion.
In Comparative Example 4, the removal work is similar to that in Example 2, but the work to be folded and gathered takes much longer than the others.
In Example 2, even if it is put in the bag while removing it, it takes only a little more time than the folding of Comparative Example 3, and if all of the previously removed items are put in the bag, it is very short, 30 seconds. It takes time. Also, when the previously removed one is rewound into the paper tube, it takes as long as 2 minutes and 13 seconds, but it is 1 to 2 minutes shorter than that of Comparative Example 4, and the total recovery is based on the other two methods of Example 2. It took almost the same time as the one.

  Comparative Example 3 is easy to break down, and it takes time to remove and re-extend. Comparative Example 4 is rigid and takes time to fold up, whereas Example 2 is hard to break down. It was also found that folding and bagging or paper tube winding can be performed without any problems. In addition, it was confirmed that the net of Comparative Example 2 had to be lowered to the surrounding ground of the enclosure, 2 m wide when working on expansion, removal, and further folding.

  As described above, the agricultural insect repellent and the bird net, which are the embodiments of the present invention, can be quickly and easily removed when they are spread on the support or the like as compared with the conventional agricultural insect repellent and bird net. We confirmed that we could work.

It is the whole figure which developed the net 1 of one example of the present invention. FIG. 2 is an enlarged view of a structure portion showing a relationship between warp and weft of the net in FIG. 1. It is a schematic diagram of how to open when the net wound on the winding roll of the paper tube is developed. It is a figure which shows the structure | tissue part of the net | network used for the comparative example 1. FIG. It is a figure which shows the structure | tissue part of the net | network used for the comparative example 2. FIG. FIG. 4 is a diagram illustrating an experimental method of Experiment 1. It is a figure showing the state which extended | stretched the net | network of an Example and a comparative example in Experiment 2. FIG. It is a figure which shows the structure | tissue part of the net | network used for the comparative example 4. FIG.

Explanation of symbols

1 Net 1
2 Warp 3 Weft 4-1 String 4-2 String 5 Loop 6 Strut

Claims (3)

A net composed of a knitted fabric with a large inter-yarn gap formed by connecting warps in a chain form in the warp direction with wefts in a non-loop state in the weft direction. An agricultural insect repellent in which a flat tape yarn is used and a warp yarn is also a tape yarn, and a flat tape yarn is inserted as a string in the warp direction at both ends of the width of the net or in the vicinity thereof , Bird net The agricultural insect repellent and bird net according to claim 1, wherein at least one of the strings is inserted in a warp direction that is not at both ends. 3. Agricultural insect repellent and bird net according to claim 1, wherein the wide web of the net is folded in the weft direction and wound around a winding roll narrower than the original web width.

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