JP6775805B2 - Wrap net - Google Patents

Description

The present invention relates to a wrap net used in the agriculture and livestock industry, and is particularly used when storing and transporting grass such as hay and straw, or vegetation cut by riverbank maintenance as a roll veil. It's about wrap nets.

Traditionally, in the livestock industry, hay harvested from summer to autumn, dried hay such as straw, and silage obtained by lactic acid fermentation of this hay have been stored and utilized as winter feed for livestock. .. When turning hay or straw into hay or silage, first, the roll vader device winds the hay or straw into a roll and forms it into a cylindrical shape to form a roll veil.

Next, the roll bale is covered with a plastic wrap or the like and left for several days so that the shape of the roll bale does not collapse. After that, the roll veil that has become an appropriately dried state is transported and stored. In addition, it may be transported and stored by tightly covering it with a wrap film over a roll bale covered with a wrap net.

When the grass stored in this way is used as feed, the wrap net is removed and the grass is made into a feed in an easy-to-eat state using a stirrer. At this time, the removed wrap net is disposed of as industrial waste.

As described above, the wrap net is a material that prevents the roll veil from collapsing and has high air permeability, which is the most suitable material for drying grass. The method of wrapping the roll bale using such a wrap net is suitable for transporting and storing grass, and is beginning to spread throughout the country including Hokkaido.

On the other hand, in recent years, a business has begun in which hay and straw are not used as hay and silage, but as a fermentation raw material for bioethanol, which is a carbon-neutral fuel. In addition to hay and straw, vegetation cut by riverbank maintenance is also considered to be used as a fermentation raw material for bioethanol. In this way, even when hay or straw is used as a fermentation raw material, it is effective to wind it into a roll with a roll vader device, mold it into a cylindrical roll bale, and transport and store it in a processing factory. is there.

The wrapping machine shown in Patent Document 1 or Patent Document 2 below is a device for automatically and efficiently wrapping a roll bale with a wrap net or a wrap film.

A general-purpose synthetic resin such as polyethylene is used for the wrap net used in such a wrapping machine, and a slit yarn obtained by cutting a polyethylene film into a long strip is used from the viewpoint of economy and the like. The slit yarn is formed from a stretched high density polyethylene (HDPE) film to maintain the physical properties (particularly strength) of the wrap net, so that the elongation of the wrap net is very small.

In the actual work, when wrapping the wrap net on the roll bale, a large tension is applied by the wrapping machine to wrap it. Therefore, a large tension is applied to the outer circumference of the roll bale wrapped by the wrap net, and the roll bale is firmly and firmly fixed.

In this way, even if the wrapping is performed with a wrap net that is effective for transportation and storage, when the roll veil is subsequently used as feed, the wrap net is cut and removed to loosen the grass. At that time, the wrap net had a problem that it was difficult to remove the slit yarns having a small elongation because they were piled up with a large tension and wrapped around the roll bale.

For example, a strong force is required to cut and remove the wrap net from the roll veil, and there are many accidents in which an operator accidentally injures his body with a knife. In addition, there has been an accident in which a worker who tried to remove the uncut part of the wrap net was found during stirring of the grass and was caught in the machine.

In addition, due to the difficulty of removing the wrap net, there is a problem that a part of the removed lap net is mixed in the livestock feed. In this way, if a part of the wrap net is mixed in the livestock feed, the livestock will eat the synthetic resin wrap net together with the feed, and the livestock will get sick or die. there were.

Further, as described above, a general-purpose synthetic resin such as polyethylene is used for the removed wrap net. Therefore, these must be disposed of as industrial waste, and there is a problem that the labor and processing cost are large for the agricultural and livestock industry.

On the other hand, even if hay, straw, etc., or vegetation cut by riverbank maintenance, etc. are transported and stored as roll veils as fermentation raw materials for bioethanol, the wrap net is similarly cut and removed when starting fermentation work. It is necessary to unravel the hay and straw. As described above, a general-purpose synthetic resin such as polyethylene is used for the wrap net. These general-purpose synthetic resins cannot be used as a fermentation raw material for bioethanol.

The difficulty of removing the wrap net is the same as in the case of the agriculture and livestock industry, and there arises a problem that a part of the removed wrap net is mixed in the fermentation raw material of bioethanol. As described above, if a part of the wrap net is mixed in the fermentation raw material of bioethanol, troubles such as clogging of the fermenter or entanglement in the mixing device can be considered.

As a method for eliminating such a gate break point of the wrap net, the present inventor has proposed a lap net according to the following Patent Document 3 and a method for manufacturing the same. In this wrap net, the warp threads constituting the net form a plurality of independent chain knits by continuous loops in the length direction of the knitted fabric, and each loop of these independent chain knits is another loop of another independent chain knit. It is characterized in that it is connected by a weft made of cellulosic fibers. Further, this wrap net is characterized in that the yarn strength of the warp yarn is larger than the yarn strength of the weft yarn.

This wrap net maintains the merit of wrapping with the conventional wrap net, which is effective for transportation and storage, and facilitates the work of removing the wrap net. Further, in this wrap net, both the warp and the weft are made of cellulosic fibers such as cotton yarn, and even if the residue of the wrap net is mixed in the feed or the fermentation raw material, the influence on livestock is small, or the fermentation apparatus. Does not cause any trouble. Furthermore, this wrap net is made of cellulosic fibers that return to the soil, and there is no problem in disposing of industrial waste.

Japanese Unexamined Patent Publication No. 6-70631 Patent No. 3801618 Patent No. 5892637

By the way, when wrapping a roll bale with a wrapping machine, after wrapping the first roll bale, the end of the wrap net is cut and the wrapping of the second roll bale is started. At this time, the powder of the cut wrap net may not spread as a knitted fabric and may be focused like a rope.

Also, depending on the structure of the wrapping machine, the powder of the cut wrap net may get entangled in the unwinding roll of the wrapping machine. Such a state does not always occur, but leads to a problem that a plurality of roll veils cannot be automatically wrapped in succession.

Such a problem does not occur in the conventional wrap net made of slit yarn of general-purpose synthetic resin, and it is considered that the cause is, for example, the use of twisted yarn such as cotton yarn, but other than that. It seems that there is also a cause, and it was unknown until now.

Therefore, the present invention addresses the above and maintains and cuts the characteristics of the wrap net made of cellulosic fiber, which solves the problems of the conventional wrap net made of slit yarn of general-purpose synthetic resin. It is an object of the present invention to provide a wrap net that is not entangled in the unwinding roll of the wrapping machine without focusing the repellent of the wrap net.

In solving the above problems, the present inventor has found that the above object can be achieved by changing the knitting structure of the lap net, particularly the knitting structure of the independent chain knitting formed by the warp group, as a result of diligent research. It was completed.

That is, the wrap net according to the present invention is according to the description of claim 1.
A group of warp threads composed of cellulosic fibers parallel to each other in the length direction of the knitted fabric form a plurality of independent chain knitting by continuous loops in the length direction of the knitted fabric.
Each loop of the independent chain knitting is composed of a knitted fabric formed by connecting the other loops of the other independent chain knitting with a weft made of cellulosic fibers.
The plurality of independent chain knitting is characterized in that one or several loops consisting of closed stitches and one or several loops consisting of open stitches are alternately formed.

Further, the present invention is the wrap net according to claim 1, according to claim 2.
It is characterized in that the yarn strength of the warp yarn is larger than the yarn strength of the weft yarn.

Further, the present invention is the wrap net according to claim 1 or 2, according to the description of claim 3.
The warp yarns are single yarns of 5th to 20th count short fiber spun yarns made of cotton fibers, or twisted yarns or drawn-aligned yarns made of at least two or more yarns of the single yarns.
The weft is a single yarn of 10 to 40 count short fiber spun yarns made of cotton fibers.

Further, according to the description of claim 4, the present invention is the wrap net according to any one of claims 1 to 3.
The weft is the independent chain knitting at the entanglement point between the needle loop of the loop that extends from the lower side to the upper side in the length direction of the knitted fabric to form the independent chain knitting and the sinker loop of the loop directly above the loop. Inserted in
Further, at the confounding point between the needle loop of the loop extending upward and forming the independent chain knitting and the other independent chain knitting adjacent thereto and the sinker loop of the loop directly above the loop, the other independent chain knitting is formed. By being inserted
The knitted fabric is knitted by connecting the independent chain knitting and another independent chain knitting adjacent thereto.

Further, the present invention is the wrap net according to claim 4, according to claim 5.
The independent chain knitting and the other independent chain knitting adjacent thereto are characterized in that they are connected by one or a plurality of weft threads.

Further, the present invention is the wrap net according to claim 5, according to claim 6.
With a warp knitting machine, the knitting density is 0.5 to 20 courses / 2.54 cm, and the distance between the independent chain knitting that is continuous in the length direction of the knitted fabric and another adjacent independent chain knitting is 10 cm or less. It is characterized by being organized into.

Further, the present invention is the wrap net according to claim 6, according to claim 7.
In the one independent chain knitting, the distance between the connecting points by the weft threads with the one independent chain knitting adjacent thereto is 1.0 cm to 5.0 cm.
The distance between the independent chain knitting and one of the independent chain knitting adjacent thereto is 1.5 cm to 5.0 cm.

According to the above configuration, the wrap net according to the present invention is made of a knitted fabric knitted with warp threads and weft threads made of cellulosic fibers. The warp forms a plurality of independent chain knits extending in the length direction of the knitted fabric. On the other hand, the weft yarn forms a knitted fabric by connecting each loop of the independent chain knitting with another loop of the other independent chain knitting. Further, in each of the plurality of independent chain knits, one or several loops composed of closed stitches and one or several loops composed of open stitches are alternately formed.

In this way, since both the warp and weft are made of cellulosic fibers, even if livestock eat a part of the wrap net made of cellulosic fibers together with feed, it is the same component as hay and straw. , It is digested in the body of livestock and does not affect livestock. Further, even when a part of the wrap net made of cellulosic fibers is mixed with the fermentation raw material and enters the fermentation apparatus, it is decomposed in the same manner as hay and straw and becomes a fermentation raw material for bioethanol. Further, without removing the wrap net from the roll veil, the wrap net can be shredded together with the roll bale and the whole amount can be used as livestock feed or as a fermentation raw material.

In addition, a plurality of independent chain knits are formed by alternately forming one or several loops consisting of closed stitches and one or several loops consisting of open stitches, so that the end of the cut wrap net is formed. Does not entangle with the unwinding roll of the wrapping machine without focusing.

Further, according to the above configuration, the yarn strength of the warp yarn may be larger than the yarn strength of the weft yarn. As a result, when removing the lap net after use, the weft yarn having a weak yarn strength is preferentially cut, and the wrap net removal work becomes easy. Therefore, there is no accident that the operator of the removal work accidentally injures the body with the blade.

Further, according to the above configuration, the warp is a single yarn of 5th to 20th short fiber spun yarns made of cotton fibers, or a twisted yarn or a draw-aligned yarn made of at least two or more yarns of the single yarn. The weft may be a single yarn of 10 to 40 count short fiber spun yarns made of cotton fibers. As a result, when removing the lap net after use, the weft yarn having a weak yarn strength is preferentially cut, and the work of removing the wrap net becomes easier.

Further, according to the above configuration, the knitting structure of the wrap net consists of a needle loop of a loop in which the weft threads extend from the lower side to the upper side in the length direction of the knitted fabric to form an independent chain knitting, and a loop directly above the loop. It may be inserted into the independent chain knitting at the intersection with the sinker loop of. Further, the weft is inserted into the other independent chain knitting at the confounding point between the needle loop of the loop forming the other independent chain knitting adjacent to the weft and the sinker loop of the loop directly above the loop. It may be.

As a result, the independent chain knitting and other independent chain knitting adjacent to the independent chain knitting are connected to knit the knitted fabric, and at the time of removing the lap net, only the weft with weak thread strength is cut and each independent chain is cut. The work of removing the knitting becomes easier.

Further, according to the above configuration, the independent chain knitting and the other independent chain knitting adjacent thereto may be connected by one or a plurality of weft threads. As a result, the size of the opening portion of the wrap net formed by the independent chain knitting and the weft can be freely adjusted, the shape of the roll bale is firmly maintained, and the contents of the roll bale are exposed to the outside. It can be suppressed from falling off.

Further, according to the above configuration, the knitting density of the lap net is 0.5 to 20 courses / 2.54 cm on the warp knitting machine, and the distance between the independent chain knitting and the other adjacent independent chain knitting is large. It may be knitted so as to be 10 cm or less. As a result, the merit of the wrap net that is effective for transportation and storage is maintained, and the work of removing the wrap net becomes easy.

Further, according to the above configuration, in the one independent chain knitting, the distance between the connecting points by the weft with one of the independent chain knitting adjacent thereto is 1.0 cm to 5.0 cm, and the independent chain is said. The distance between the knitting and one of the independent chain knitting adjacent thereto may be 1.5 cm to 5.0 cm. As a result, the above effect can be further achieved.

Therefore, according to the present invention, the characteristics of the wrap net made of cellulosic fiber that solves the problem of the conventional wrap net made of slit yarn of general-purpose synthetic resin are maintained, and the powder of the cut wrap net is maintained. It is possible to provide a wrap net that does not get entangled in the unwinding roll of the wrapping machine without focusing.

It is the schematic which shows the organization of the lap net which concerns on this embodiment. It is a schematic diagram which shows the connection state of the independent chain knitting when the wrap net of FIG. 1 is extended back and forth and left and right. It is the schematic which shows the other organization structure of the lap net which concerns on this embodiment. It is a schematic diagram which shows the connection state of the independent chain knitting when the wrap net of FIG. 3 is extended back and forth and left and right. It is a mesh diagram (A1) and a tissue diagram (B1) when the independent chain knitting is composed of only closed loops in a conventional wrap net. It is a mesh diagram (A2) and a structure diagram (B2) when the independent chain knitting is composed of only the opening loop in the conventional wrap net. It is a mesh diagram (A3) and a structure diagram (B3) when the independent chain knitting is alternately composed of the closed stitch loop and the open stitch loop in the wrap net according to the present embodiment.

Hereinafter, the lap net according to the present invention will be described in detail by embodiment. The present invention is not limited to the following embodiments.

The wrap net according to the present embodiment is knitted with warp threads and weft threads made of cellulosic fibers. Here, examples of the cellulosic fibers used for the warp and weft include natural cellulosic fibers such as cotton and hemp, and regenerated cellulose fibers such as rayon, cupra, polynosic or tencel. Examples of hemp fibers include flax (linen), ramie (ramie), cannabis (hemp), and jute (jute).

In the present embodiment, since both the warp and the weft are made of cellulosic fibers, even when a part of the wrap net becomes a residue when the wrap net is removed from the roll veil and is mixed in hay or straw. There is little impact on livestock, or the fermentation equipment does not cause trouble.

That is, when the roll veil is used as feed for livestock, even if the livestock eats a part of the wrap net made of cellulosic fiber together with the feed, it is the same component as hay and straw, and the livestock It is digested in the body and does not affect livestock. In addition, when roll veil is used as a fermentation raw material for bioethanol, even if a part of the wrap net made of cellulosic fibers is mixed with the fermentation raw material and enters the fermentation apparatus, it is the same as hay and straw. It is decomposed and becomes a fermentation raw material for bioethanol. Further, without removing the wrap net from the roll veil, the wrap net can be shredded together with the roll bale and the whole amount can be used as livestock feed or as a fermentation raw material.

Further, since both the warp and the weft are made of cellulosic fibers, the wrap net removed from the roll veil can be directly buried in the soil and discarded. Alternatively, even when the used wrap net is incinerated, it is carbon-neutral to the conventional synthetic resin fiber and does not emit new CO ₂ . Therefore, the labor and processing cost for disposing of the used lap net, and the impact on the environment can be reduced.

In the present embodiment, among the above-mentioned cellulosic fibers, it is preferable to use natural cellulosic fibers, and it is particularly preferable to use cotton fibers. This is because the cotton fiber is a general-purpose fiber, and spun yarns of various thicknesses can be obtained inexpensively and easily.

In the present embodiment, when a yarn made of cotton fiber is used as the warp, a single yarn having a thick count may be used as it is, or at least two single yarns having a medium count to a thick count may be used. It may be used together. For example, when two or more single yarns of cotton fibers are used together, even if two or more single yarns of 5th to 20th short fiber spun yarns are twisted and used as a twisted yarn. Good. Further, it may be used as a pull-aligned yarn in which two or more single yarns of 5th to 20th short fiber spun yarns are aligned without being twisted.

In the present embodiment, it is easy to use 5th to 20th count cotton spun yarns as single yarns because these yarns are thick, have strong yarn strength, and are distributed on the market as low-priced general-purpose yarns. This is because it can be obtained at. Further, when a twisted yarn or a aligned yarn is used as the warp yarn, the yarn strength of the thick yarn can be further increased to increase the difference in yarn strength from the weft yarn described later. The degree of twisting of the single cotton spun yarn may be appropriately selected depending on the yarn strength and elongation.

Here, the combined twisted yarn means a yarn obtained by pulling and twisting two or more yarns. In the case of a combined twisted yarn, since two or more yarns are twisted together, the yarn has a higher yarn strength than the drawn-aligned yarn. A twisted yarn made by twisting two yarns is called a twin yarn, and a twisted yarn made by twisting three yarns is called a triplet yarn. Usually, twin yarns and triplet yarns are twisted in the direction opposite to the twist of a single yarn. The twist of a single yarn is called a lower twist, and the twist of a twin yarn or a triplet yarn is called an upper twist. The degree of top twisting of the combined twisted yarn may be appropriately selected depending on the yarn strength and elongation. On the other hand, the pull-aligned yarn refers to a yarn in which two or more yarns are aligned and used without being twisted. In the case of a draw-aligned yarn, since two or more yarns are used while being aligned, the yarn has excellent yarn strength.

On the other hand, in the present embodiment, when a yarn made of cotton fiber is used as the weft, it is preferable to use a single yarn of 10th to 40th cotton spun yarn, and 20th to 30th cotton spun yarn. It is more preferable to use a single yarn. This is because the 10th to 40th count cotton spun yarns are also distributed on the market as low-priced general-purpose yarns and can be easily obtained. The reason why a single yarn is used for the weft is to increase the difference in yarn strength from the above-mentioned warp yarn. The degree of twisting of the cotton spun yarn may be appropriately selected depending on the yarn strength and elongation.

Further, when the cotton spun yarn used for the weft yarn is thicker than the 10th yarn, the yarn strength becomes large and the difference from the yarn strength of the warp yarn becomes small, so that the effect of the present invention cannot be exhibited. On the other hand, when the cotton spun yarn is thinner than the 40th yarn, the yarn strength is small, it is difficult to maintain the shape of the wrap net, and the yarn price is high.

In the present embodiment, the yarn strength of the warp yarn is required to be larger than the yarn strength of the weft yarn. As a result, when removing the lap net after use, the weft yarn having a weak yarn strength is preferentially cut, and the work of removing the wrap net becomes easier. Therefore, there is no accident that the operator of the removal work accidentally injures the body with the blade.

Here, the reason why the yarn strength of the weft yarn is made smaller than that of the warp yarn will be described in more detail. As for the physical properties when using the wrap net, the warp threads maintain the strength in the length direction of the knitted fabric, and the weft threads maintain the connection in the weft direction (the knitting will be described later). Therefore, it is the yarn strength of the warp that firmly fixes the outer circumference of the roll bale after wrapping, and the weft is not required to have the same yarn strength as the warp.

The reason why the conventional wrap net uses the same yarn for the warp and the weft is that it is easy to manufacture and can be knitted at low cost. On the other hand, in the present embodiment, a yarn having a yarn strength smaller than that of the warp is used as the weft, and a yarn strength difference is made between the warp and the weft. As a result, in the work of removing the wrap net after use, when the warp yarn having a high yarn strength is pulled away from the roll bale, the weft yarn having a low yarn strength connected to the warp yarn is cut.

When the weft yarn is cut in this way, the wrap net is in an independent chain knitting state consisting of warp yarns having high yarn strength (the knitting will be described later). These independent chain knits have the same shape as the rope and can be easily removed from the roll bale. This facilitates the work of removing the lap net, and does not cause an accident in which the operator of the work of removing the wrap net accidentally injures the body with a knife.

On the other hand, most of the wefts cut by the removing operation are removed along with the warp of the independent chain knitting. However, some wefts will become residues and be mixed into the hay and silage of the roll veil. However, these residues are composed of cellulosic fibers and have the same components as hay and straw, and are digested in the body of livestock without affecting the livestock.

In addition, when roll veil is used as a fermentation raw material for bioethanol, even if a part of the wrap net made of cellulosic fibers is mixed with the fermentation raw material and enters the fermentation apparatus, it is the same as hay and straw. It is decomposed and becomes a fermentation raw material for bioethanol. Further, without removing the wrap net from the roll veil, the wrap net can be shredded together with the roll bale and the whole amount can be used as livestock feed or as a fermentation raw material.

Next, the organization organization constituting the wrap net according to the present embodiment will be described. In the present embodiment, the wrap net is a warp knitting net knitted by a warp knitting machine using warp threads and weft threads made of the above-mentioned two types of cellulosic fibers. Here, the warp knitting is a knitting method in which a group of warp threads parallel to each other in the length direction of the knitted fabric forms a continuous stitch (loop) in the length direction of the knitted fabric, and is generally the length of the knitted fabric. It is characterized by high strength in the vertical direction.

As the knitting organization of the warp knitting, there are various knitting organizations based on the basic organization such as single denby, single cord, single atlas, and chain stitch (chain stitch), but in the present embodiment, among these, the chain Adopt stitches. The wrap net according to the present embodiment needs to be a knitted fabric in which a chain stitch (chain knitting) is formed of warp yarns made of cellulosic fibers and a weft yarn made of cellulose fibers is inserted into the chain stitch (chain knitting). Is. This is because in a knitting structure other than the chain stitch, each chain stitch is connected by a warp, and in the work of removing the wrap net after use, the connected portion is not cut and the removal work becomes difficult.

Further, as the warp knitting machine, there are a Raschel knitting machine, a tricot knitting machine and the like. In the present embodiment, any knitting machine may be used, but it is generally preferable to use a Raschel knitting machine in terms of productivity and the like.

Here, the organization of the lap net according to the present embodiment will be specifically described. FIG. 1 is a schematic view showing a wrap net organization according to the present embodiment. In FIG. 1, the wrap net (11) is composed of a warp (1) made of a cellulosic fiber having a high yarn strength and a weft (2) made of a cellulosic fiber having a weak yarn strength, and the warp (1) is a knitted fabric. Form the loop (30) that forms the basis of.

FIG. 1 shows a knitted fabric knitted by chain stitch consisting of wales (ridges in the vertical direction) and courses (ridges in the horizontal direction). Each wales (40) and each course (50) are further knitted in the vertical and horizontal directions to form a wide and long knitted fabric. In FIG. 1, six warp threads (1) arranged in parallel in the vertical direction each form a continuous loop (30) while extending upward in the drawing, and a wale (40) composed of an independent chain knitting (20). To configure.

In this state, the wales (40) of each independent chain knitting are not connected to each other and do not form a knitted fabric. Therefore, the warp group (1) made of cellulosic fibers forms the wales (40) of each independent chain knitting (20), and one weft (2) made of cellulosic fibers forms each loop of the wales (40). A warp knitting net is knitted so as to connect (30) with another loop (30) of another wale.

Although it is not shown accurately in FIG. 1, it is knitted in the same manner as a normal chain stitch in this embodiment as well. Specifically, one weft (2) extends upward in the figure, and first, the entanglement point of two consecutive loops of the wales (a needle loop convex upward from one loop and a loop directly above it). At the point where it connects with the sinker loops that are convex downwards), it extends upward through (through) these loops.

The single weft (2) then extends further upward through (through) these loops at the intersection of two consecutive loops of other adjacent wales. The single weft (2) then extends further upwards through (through) these loops at the entanglement of two consecutive loops of the original wale adjacent to it, and then extends similarly. Connect each wales.

The knitting density of the warp knitting net knitted by the warp knitting machine (knitting density of chain knitting) is preferably 0.5 to 20 courses / 2.54 cm, preferably 1 to 10 courses / 2.54 cm. More preferably. Further, it is preferable that the distance between the stitches continuous in the length direction of the knitted fabric and the adjacent stitches is 10 cm or less.

Here, the opening of the stitches of the wrap net will be described more specifically. FIG. 2 is a schematic view showing a connected state of the independent chain knitting when the wrap net of FIG. 1 is extended back and forth and left and right. This shows a state close to a wrap net wrapped on the surface of the roll bale. In FIG. 2, the two independent chain knitting (20) are in a state of being extended in the warp direction. Further, one weft thread (2) connecting the two independent chain knitting (20) is also in an extended state.

In this state, the distance between the two independent chain knitting (20) is set to X1, and in the independent chain knitting (20) on the right side of the drawing, the connecting point by the weft (2) connecting the independent chain knitting (20) on the left side of the drawing. Let Y1 be the interval between. At this time, it is more preferable that the interval of X1 is in the range of 1.5 cm to 5.0 cm. Further, it is more preferable that the interval of Y1 is in the range of 1.0 cm to 5.0 cm. As a result, shortly cut hay and straw do not fall off from the mesh of the wrap net and have a certain degree of roughness, so the basis weight (weight per unit area) is small and the wrap is economical. You can configure the net. As a result, the merit of the wrap net that is effective for transportation and storage is maintained, and the work of removing the wrap net becomes easy.

Next, another organization of the lap net according to the present embodiment will be specifically described. FIG. 3 is a schematic view showing another organization of the lap net according to the present embodiment. In FIG. 3, the wrap net (12) is composed of a warp (1) made of a cellulosic fiber having a high yarn strength and a weft (2) made of a cellulosic fiber having a weak yarn strength, and the warp (1) is a knitted fabric. Form the loop (30) that forms the basis of.

FIG. 3 shows a knitted fabric knitted by a chain stitch composed of a wale (ridge in the vertical direction) and a course (ridge in the horizontal direction) as in FIG. Each wales (40) and each course (50) are further knitted in the vertical and horizontal directions to form a wide and long knitted fabric. In FIG. 3, six warp threads (1) arranged in parallel in the vertical direction each form a continuous loop (30) while extending upward in the drawing, and a wale (40) composed of an independent chain knitting (20). To configure.

In this state, the wales (40) of each independent chain knitting are not connected to each other and do not form a knitted fabric. Therefore, the warp group (1) made of cellulosic fibers forms the wales (40) of each independent chain knitting (20), and the two wefts (2) made of cellulosic fibers form each loop of the wales (40). A warp knitting net is knitted so as to connect (30) with another loop (30) of another wale.

Although not shown accurately in FIG. 3, a normal chain stitch is knitted in the same manner as in FIG. 1. Specifically, the two weft threads (2) extend upward in the figure, and first, the entanglement point of two consecutive loops of the wales (a needle loop convex upward from one loop and a loop directly above it). (Where it connects with the sinker loops that are convex downward), it extends symmetrically upward through these loops (through).

The two weft threads (2) then extend further upward through (sneak through) these loops at the intersection of two consecutive loops of other adjacent wales. The two weft threads (2) then extend further upwards through (sneak through) these loops at the intersection of two consecutive loops of the original wale adjacent to each other, and then extend similarly. Connect each wales.

Further, also in the wrap net of FIG. 3, the knitting density (knitting density of chain knitting) of the warp knitting net knitted by the warp knitting machine is preferably 0.5 to 20 courses / 2.54 cm, and 1 to 1 More preferably, it is 10 courses / 2.54 cm. Further, it is preferable that the distance between the stitches continuous in the length direction of the knitted fabric and the adjacent stitches is 10 cm or less.

Here, the opening of the stitches of the wrap net of FIG. 3 will be described more specifically. FIG. 4 is a schematic view showing a connected state of the independent chain knitting when the wrap net of FIG. 3 is extended back and forth and left and right. This shows a state close to a wrap net wrapped on the surface of the roll bale. In FIG. 4, the two independent chain knitting (20) are in a state of being extended in the warp direction. Further, the two weft threads (2) connecting the two independent chain knitting (20) are also in an extended state.

In this state, the distance between the two independent chain knitting (20) is X2, and in the independent chain knitting (20) on the right side of the drawing, the two weft threads (2) connecting the independent chain knitting (20) on the left side of the drawing. Let Y2 be the interval between the connecting points. At this time, it is more preferable that the distance between X2 is in the range of 1.5 cm to 5.0 cm. Further, it is more preferable that the interval of Y2 is in the range of 1.0 cm to 5.0 cm. As a result, shortly cut hay and straw do not fall off from the mesh of the wrap net and have a certain degree of roughness, so the basis weight (weight per unit area) is small and the wrap is economical. You can configure the net. As a result, the merit of the wrap net that is effective for transportation and storage is maintained, and the work of removing the wrap net becomes easy.

Next, the knitting of the independent chain knitting (20), which is a feature of the wrap net according to the present invention, will be described. First, the knitting of the independent chain knitting that constitutes the conventional lap net will be described. FIG. 5 is a mesh diagram (A1) and a tissue diagram (B1) when the independent chain knitting is composed of only closed loops in the conventional wrap net. In FIG. 5, since all the loops constituting the independent chain knitting (20a) are composed of closed loops (31), torque is applied to the independent chain knitting (20a) in a certain direction to cause twisting. It is likely to occur.

Further, FIG. 6 is a mesh diagram (A2) and a tissue diagram (B2) when the independent chain knitting is composed of only the opening loop in the conventional lap net. Also in FIG. 6, since all the loops constituting the independent chain knitting (20b) are composed of the open stitch loop (32), torque is applied to the independent chain knitting (20b) in a certain direction to twist the independent chain knitting (20b). It is likely to occur.

The conventional wrap net made of slit yarn made of general-purpose synthetic resin has the same independent chain knitting structure as in FIG. 5 or 6, but the cut wrap net does not converge and wraps. I didn't get entangled in the unwinding roll of the machine. However, when the wrap net made of cotton yarn is knitted with the same independent chain knitting configuration as in FIG. 5 or 6, the powder of the cut wrap net is focused when used in a conventional wrapping machine. May get entangled in the unwinding roll of the wrapping machine.

The reason for this is not clear, but the present inventor considered it as follows. That is, all the loops constituting the independent chain knitting (20a) are composed only of the closed eye loop (31), or all the loops constituting the independent chain knitting (20b) are composed only of the open stitch loop (32). In this case, as described above, torque is applied to the independent chain knitting in a certain direction, and twisting is likely to occur.

Further, when cotton yarn, which is a spun yarn, is used as the warp yarn, twisting in a certain direction (S twist or Z twist) by spinning tends to cause twisting in a certain direction in the independent chain knitting. The twist caused by the closed loop (31) or the open loop (32) and the twist caused by the twist of the cotton thread (S twist or Z twist) act synergistically to increase the torque and further increase the twist. Is expected to occur. It is considered that the twist due to knitting and the twist due to spinning may be canceled depending on the combination method, but it is desirable to completely eliminate the twist.

Therefore, in the present embodiment, it is decided to change the knitting structure of the independent chain knitting. FIG. 7 is a mesh diagram (A3) and a tissue diagram (B3) when the independent chain knitting is alternately composed of the closed stitch loop and the open stitch loop in the wrap net according to the present embodiment. In FIG. 7, it can be seen that each loop constituting the independent chain knitting (20c) is configured by alternately arranging one closed loop (31) and one open loop (32).

In addition, in this embodiment, the closing stitch (31) and the opening stitch (32) are not limited to being alternately arranged one by one, and several of them are alternately arranged and configured. May be good. Specifically, it may be any one that eliminates the twist in a certain direction of the independent chain knitting, such as alternating two by two or alternating three by three.

It is considered that this cancels the twist caused by each loop of the independent chain knitting (20c) and prevents the twist in a certain direction from occurring. As a result, even if the cotton yarn is twisted due to twisting (S twisting or Z twisting), the powder of the cut wrap net is not focused and is not entangled in the unwinding roll of the wrapping machine.

Next, a method for manufacturing the wrap net will be described. As the wrap net manufacturing apparatus, a normal warp knitting machine can be used. Examples of the warp knitting machine include a Russell knitting machine and a tricot knitting machine, and in the present embodiment, it is preferable to use the Russell knitting machine. These warp knitting machines include a warp delivery mechanism, a weft supply mechanism, a patterning mechanism, a stitch forming mechanism, and a winding mechanism.

The warp delivery mechanism is a mechanism for delivering a plurality of warped warp threads by an appropriate tension for a length required for stitch formation. The weft supply mechanism is a mechanism for delivering the weft threads required for stitch formation by a required length with an appropriate tension. The patterning mechanism is a mechanism for selecting a knitting needle to be fed, and forms a knitted fabric in conjunction with a stitch forming mechanism that controls the movement of the reed and the movement of the knitting needle. The winding mechanism is a mechanism for winding the knitted fabric formed by the stitch forming mechanism on the winding roller at a constant speed. Such a Raschel knitting machine is not special, and details of the knitting machine and the knitting process will be omitted here.

Next, the lap net according to the present embodiment will be specifically described with reference to Examples 1 and 2. The present invention is not limited to the following examples.

In the first embodiment, as the warp yarns composed of cellulosic fibers constituting the wrap net, twin yarns (20/2) of twisted yarns in which two 20-count cotton spun yarns were drawn and twisted were used. On the other hand, as a weft made of cellulosic fibers constituting the wrap net, a 30-count single yarn (30 / −) made of cotton spun yarn was used as a single yarn. In addition, the twist coefficient of each cotton spun yarn was controlled in the range of 4.0 to 4.8 so that the strength of the warp yarn was larger than the strength of the weft yarn.

In the first embodiment, a Raschel knitting machine is used to knit the wrap net, and the wrap net of the knitting structure shown in FIG. 1 described above (a net in which two adjacent independent chain knits are connected by one weft). Was organized. The knitting density of the wrap net knitted in the first embodiment is 2 courses / 2.54 cm, and the chain stitch (independent chain knitting) that is continuous in the length direction of the knitted fabric and the adjacent chain stitch (independent chain knitting). The distance from (X1 in FIG. 2) was 2.5 cm (about 1 inch). Further, the distance between the connecting points (Y1 in FIG. 2) in one chain stitch (independent chain knitting) was 2.5 cm (about 1 inch).

Next, the roll bale wrapping work was performed using a wrapping machine. In the wrap net of the first embodiment, when the repellent of the wrap net is cut after wrapping the first roll bale, the repellent of the wrap net is maintained in a spread state as a knitted cloth, like a rope. There was no focus. In addition, the powder of the cut wrap net did not get entangled in the unwinding roll of the wrapping machine. The same operation was repeated multiple times, but in each case, the powder of the cut wrap net was not focused and was not entangled in the unwinding roll of the wrapping machine.

In Example 2, as the warp yarn made of cellulosic fibers constituting the wrap net, a 12-count single yarn (12 / −) made of cotton spun yarn was used as the single yarn. On the other hand, as a weft made of cellulosic fibers constituting the wrap net, a 30-count single yarn (30 / −) made of cotton spun yarn was used as a single yarn. In addition, the twist coefficient of each cotton spun yarn was controlled in the range of 4.0 to 4.8 so that the strength of the warp yarn was larger than the strength of the weft yarn.

For knitting the wrap net in the second embodiment, a Raschel knitting machine is used in the same manner as in the first embodiment, and the wrap net of the knitting structure shown in FIG. 3 (two adjacent independent chain knits are formed by two weft threads). (Connected net) was organized. The knitting density of the wrap net knitted in the second embodiment is 2 courses / 2.54 cm, and the chain stitch (independent chain knitting) that is continuous in the length direction of the knitted fabric and the adjacent chain stitch (independent chain knitting). The distance from (X2 in FIG. 4) was 1.7 cm (about 1 inch). Further, the distance between the connecting points (Y2 in FIG. 4) in one chain stitch (independent chain stitch) was 1.3 cm (about 2/3 inch).

Next, the roll bale wrapping work was performed using a wrapping machine. In the wrap net of the second embodiment, when the repellent of the wrap net is cut after wrapping the first roll bale, the repellent of the wrap net is maintained in a spread state as a knitted cloth, like a rope. There was no focus. In addition, the powder of the cut wrap net did not get entangled in the unwinding roll of the wrapping machine. The same operation was repeated multiple times, but in each case, the powder of the cut wrap net was not focused and was not entangled in the unwinding roll of the wrapping machine.

As described above, according to the present invention, the wrap net made of cellulosic fibers, which solves the problems of the conventional wrap net made of slit yarn of general-purpose synthetic resin, is maintained and cut. It is possible to provide a wrap net that does not get entangled in the unwinding roll of the wrapping machine without focusing the powder.

1 ... warp, 2 ... weft, 11, 12 ... knitted fabric,
20, 20a, 20b, 20c, ... Independent chain edition,
30 ... loop, 31 ... closed eye loop, 32 ... open eye loop,
40 ... Wale, 50 ... Course.

Claims (7)

A group of warp threads composed of cellulosic fibers parallel to each other in the length direction of the knitted fabric form a plurality of independent chain knitting by continuous loops in the length direction of the knitted fabric.
Each loop of the independent chain knitting is composed of a knitted fabric formed by connecting the other loops of the other independent chain knitting with a weft made of cellulosic fibers.
The plurality of independent chain knitting is a wrap net in which one or several loops consisting of closed stitches and one or several loops consisting of open stitches are alternately formed. The wrap net according to claim 1, wherein the yarn strength of the warp yarn is larger than the yarn strength of the weft yarn. The warp yarns are single yarns of 5th to 20th count short fiber spun yarns made of cotton fibers, or twisted yarns or drawn-aligned yarns made of at least two or more yarns of the single yarns.
The wrap net according to claim 1 or 2, wherein the weft is a single yarn of 10 to 40 count short fiber spun yarns made of cotton fibers. The weft is the independent chain knitting at the intersection of the needle loop of the loop that extends from the lower side to the upper side in the length direction of the knitted fabric to form the independent chain knitting and the sinker loop of the loop directly above the loop. Inserted in
Further, at the confounding point between the needle loop of the loop extending upward and forming the independent chain knitting and the other independent chain knitting adjacent thereto and the sinker loop of the loop directly above the loop, the other independent chain knitting is formed. By being inserted
The wrap net according to any one of claims 1 to 3, wherein the independent chain knitting and another independent chain knitting adjacent thereto are connected to form a knitted fabric. The wrap net according to claim 4, wherein the independent chain knitting and another independent chain knitting adjacent thereto are connected by one or a plurality of weft threads. With a warp knitting machine, the knitting density is 0.5 to 20 courses / 2.54 cm, and the distance between the independent chain knitting connected in the length direction of the knitted fabric and another adjacent independent chain knitting is 10 cm or less. The wrap net according to claim 5, wherein the wrap net is made of. In the one independent chain knitting, the distance between the connecting points by the weft threads with the one independent chain knitting adjacent to the independent chain knitting is 1.0 cm to 5.0 cm.
The wrap net according to claim 6, wherein the distance between the independent chain knitting and one independent chain knitting adjacent thereto is 1.5 cm to 5.0 cm.