JP2017223422A - Arrow guard net, method for manufacturing arrow guard net and arrow guard net fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arrow guard net capable of efficiently absorbing a passing force of an arrow.SOLUTION: Since a mesh 3 of an arrow guard net 1 formed as a raschel net is formed as a lozenge-shape, it is possible to cause the mesh 3 to have a surplus deformation as compared with the raschel net in which the mesh is formed as a rectangular stitch. That is, when an arrow A passes through the mesh 3, it is possible to restrict an instant rupturing of a net yarn 2 or a nodal part 20 acting as a nodal portion between the net yarns 2. Accordingly, the net yarn 2 abuts against an outer periphery of the arrow A while the mesh 3 is expanding, so that it is possible to apply a frictional force against the arrow A. Thus, it is possible to absorb efficiently the passing force of the arrow A.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an arrow-proof net, an arrow-proof net manufacturing method, and an arrow-proof net mounting structure, and in particular, an arrow-proof net capable of efficiently absorbing the penetrating force of an arrow, an arrow-proof net manufacturing method, and an arrow-proofing. The present invention relates to a net mounting structure.

  There is known an arrow-proof net that is installed in an archery stadium or an archery stadium to stop an arrow deviating from a target (for example, Patent Document 1). Here, conventionally, by increasing the thickness of the arrow-proof net or by forming a small mesh (that is, by increasing the filling rate), the arrow-proof capability is increased, or a plurality of arrow-proof nets are used. The improvement of the arrow-proof ability was aimed at by repeating.

Utility Model Registration No. 3143151 (for example, paragraph 0023, FIG. 1)

  However, increasing the thickness of the arrow-proof net, reducing the mesh, or stacking a plurality of arrow-proof nets reduces the air permeability and lighting, and increases the weight. The advantage of is impaired.

  On the other hand, as a result of intensive studies to solve the above-described problems, the applicant of the present application has developed a Russell network in which the mesh is formed as a corner as a network having high mesh shape stability (the mesh is difficult to deform). It was conceived to be adopted for the arrow-proof net (unknown at the time of this application).

  However, as a result of increasing the shape stability of the mesh, there is less room for deformation of the mesh, and if an arrow is stabbed with a predetermined penetration force, the mesh thread forming the mesh and the knot between the mesh threads break. It was found that the penetrating force of the arrow could not be efficiently absorbed because it was easy to break (when the penetrating force of the arrow exceeded the rigidity of the mesh, it was easy to break immediately).

  The present invention has been made against the background of the above circumstances, and relates to an arrow-proof net capable of efficiently absorbing the penetrating force of an arrow, a method for manufacturing the arrow-proof net, and an arrow-proof net mounting structure.

Means for Solving the Problems and Effects of the Invention

  According to the manufacturing method of the arrow prevention net according to claim 1 or the arrow prevention net according to claim 7, since the mesh is formed in a rhombus, the mesh is deformed compared to the Russell network in which the mesh is formed in a corner. Can give you room. That is, when the arrow penetrates the mesh, the mesh thread and the knot portion of the mesh thread are prevented from breaking immediately, and the mesh thread contacts the outer periphery of the arrow while spreading the mesh (giving frictional force) Therefore, the penetrating force of the arrow can be absorbed efficiently.

  In addition, “rhombus” is defined as that the mesh is formed in a rhombus, turtle shell shape, or a substantially hexagonal shape (“almost hexagonal” is a shape close to a hexagonal shape, but actually Since the inner circumference of the mesh may be formed to draw a curve, it is defined as including it). That is, the “rhombus” is formed by knotting the knots of the mesh yarns in a meandering manner with respect to the knitting mesh direction (extending direction of the mesh yarn).

  Therefore, the “angle” in which the mesh yarn extends in parallel or at right angles to the knitting mesh direction (the knots are knotted in a manner in which the knot portions are scattered in parallel or at right angles to the knitting mesh direction, and the mesh is formed in a lattice shape). The “Russell” mesh has little room for deformation, whereas the “Rhino” Russell network is knotted in such a manner that the knots of the mesh threads meander in the knitting mesh direction. Minutes and meshes can be given room for deformation.

  According to the method for manufacturing the arrow-proof net according to claim 2 or the arrow-proof net according to claim 8, in addition to the effect produced by the method for manufacturing the arrow-proof net according to claim 1 or the arrow-proof net according to claim 7, The mesh yarn includes a knot portion where the mesh yarns are knotted, a connecting portion where the knot portions are connected to each other, and a first yarn connecting the connecting portions facing each other in the mesh in the first direction. When the arrow penetrates the mesh, the first thread can be brought into contact with the outer periphery of the arrow. Therefore, the contact area between the arrow and the mesh thread (first thread) is increased, and the frictional force applied to the arrow can be increased, so that the penetrating force of the arrow can be efficiently absorbed.

  According to the method for manufacturing the arrow-proof net according to claim 3 or the arrow-proof net according to claim 9, in addition to the effect produced by the method for manufacturing the arrow-proof net according to claim 2 or the arrow-proof net according to claim 8, The mesh yarn includes the second yarn that connects the first yarn and the connecting portions facing each other in the mesh in the second direction, which is a direction orthogonal to the first direction, so that when the arrow penetrates the mesh The second thread can be brought into contact along the outer periphery of the arrow. Therefore, the shape of the mesh when the arrow penetrates is made nearly circular, the contact area between the arrow and the mesh thread (the first thread and the second thread) is increased, and the frictional force applied to the arrow is increased. Can do. Therefore, there is an effect that the penetration force of the arrow can be efficiently absorbed.

  According to the method for manufacturing the arrow-proof net according to claim 4 or the arrow-proof net according to claim 10, in addition to the effect produced by the method for manufacturing the arrow-proof net according to claim 3 or the arrow-proof net according to claim 9, The first yarn and the second yarn in the mesh are each composed of the same insertion yarn, and the insertion yarn constituting the first yarn and the second yarn in the mesh is a pair of knots adjacent to the mesh on one side in the first direction. And a pair of knots adjacent to the mesh on both sides in the second direction, so that when the arrow penetrates the mesh, the mesh spreads so that the first thread and the second thread It is possible to increase the rigidity of the mesh when it is drawn toward the mesh side and the mesh spreads. That is, in the initial stage where the arrow penetrates, the mesh has room for deformation, and after the arrow begins to penetrate, the mesh can have high rigidity, so that the penetration force of the arrow can be absorbed efficiently. effective.

  According to the method for manufacturing the arrow-proof net according to claim 5 or the arrow-proof net according to claim 11, in addition to the effect produced by the method for manufacturing the arrow-proof net according to claim 4 or the arrow-proof net according to claim 10, The insertion yarns constituting the first yarn and the second yarn in the mesh form the first yarn and the second yarn in the two meshes adjacent to the mesh where the first yarn and the second yarn are formed. The 1st thread and the 2nd thread can make it easy to draw the knot portion toward the mesh side. Therefore, it is possible to increase the rigidity of the mesh when the mesh spreads, and to effectively absorb the penetrating force of the arrow.

  According to the method for manufacturing the arrow-proof net according to claim 6 or the arrow-proof net according to claim 12, in addition to the effect produced by the method for manufacturing the arrow-proof net according to claim 5 or the arrow-proof net according to claim 11, The part of the net yarn where the knots are knotted is formed with a thickness of 10000 dtex or more and 19000 dtex or less, and the filling rate of the net yarn is 65% or more and 80% or less, so the weight of the raw yarn used While preventing the increase of the yarn, it is possible to form an arrow-proof net having a net yarn filling rate of 65% to 80%. Therefore, there is an effect that an arrow-proof net having air permeability and daylighting can be formed at low cost.

  According to the manufacturing method of the arrow-proof net according to claim 13, in addition to the effect exhibited by the method of manufacturing the arrow-proof net according to claim 12, the knitting network process is knitted by an 11 gauge Russell network machine. Thus, it is possible to form an arrow-proof net having a net yarn filling rate of 65 to 80% while further suppressing an increase in the weight of the raw yarn. Therefore, there is an effect that an arrow-proof net having air permeability and daylighting can be formed at a lower cost.

  According to the mounting structure of the arrow prevention net according to claim 14, the first arrow prevention net disposed on the shooting side and the rear side of the first arrow prevention net opposite to the shooting side In addition, since the second arrow prevention net having a lower rigidity than the first arrow prevention net is provided, a high penetration force at the initial stage where the arrow is stuck is absorbed by the first arrow prevention net and the penetration force is weakened. The arrow can be received by the second arrow net. In this case, since the second arrow prevention net has a lower rigidity than the first arrow prevention net and is easily bent, the load due to the penetrating force of the arrow can be easily received by the entire second arrow prevention net. Therefore, there is an effect that the penetration force of the arrow can be efficiently absorbed.

  According to the mounting structure of the arrow prevention net according to claim 15, in addition to the effect exerted by the attachment structure of the arrow prevention net according to claim 14, the first arrow prevention net and the second arrow prevention net are provided on the irradiated side and the rear surface. Since they are arranged apart from each other, the incident angle of the arrow with respect to the second arrow prevention net can be easily increased.

  That is, when the arrow penetrates the first arrow prevention net and the thrust is weakened, the incident angle of the arrow with respect to the second arrow prevention net is likely to be larger than the incident angle of the arrow with respect to the first arrow prevention net. Therefore, it can suppress that the penetration force of an arrow concentrates on one point of a 2nd arrow prevention net, and can raise the effect by the bending of a 2nd arrow prevention net, Therefore The penetration force of an arrow can be absorbed efficiently. There is an effect.

  According to the mounting structure of the arrow prevention net according to claim 16, in addition to the effect produced by the attachment structure of the arrow prevention net according to claim 15, the distance between the first arrow prevention net and the second arrow prevention net is approximately 600 mm or less. Therefore, the installation space for the arrow-proof net can be suppressed. Moreover, the space | interval of a 1st arrow prevention net and a 2nd arrow prevention net can be adjusted according to the penetration force of the assumed arrow. Therefore, there is an effect that the installation space occupied by the arrow-proof net can be minimized.

  According to the mounting structure of the arrow prevention net of Claim 17, in addition to the effect which the attachment structure of the arrow prevention net in any one of Claim 14 to 16 show | plays, a 1st arrow prevention net is Claim 1 to 6. Therefore, the first arrow-proof net can efficiently absorb the penetrating force of the arrow, and accordingly, the rigidity of the second arrow-proof net can be set low. it can. Therefore, since the weight of the raw yarn used for a 2nd arrow-proof net can be reduced, there exists an effect that the installation cost of an arrow-proof net can be suppressed.

  According to the mounting structure of the arrow-proof net according to claim 18, in addition to the effect exerted by the mounting structure of the arrow-proof net according to claim 17, the first arrow-proof net is composed of the arrow-proof net according to claim 6. Since the filling rate of the net yarn surrounding the mesh of the second arrow-proof net is formed lower than the filling rate of the mesh yarn of the first arrow-proofing net, it is possible to suppress the drop of the arrow-proofing ability of the arrow-proof net. However, it is possible to reduce the weight of the second arrow-proof net (improve air permeability and daylighting). Therefore, there is an effect that the installation cost of the arrow-proof net can be suppressed.

  According to the mounting structure of the arrow-proof net according to claim 19, in addition to the effect produced by the mounting structure of the arrow-proof net according to claim 18, the second arrow-proof net is constituted by the arrow-proof net according to claim 6. The part where the knots in the mesh yarn of the first arrow-proof net are knotted is formed with a thickness of 15500 dtex or more and 19000 dtex or less, and the filling rate of the mesh yarn is formed with 71% or more and 80% or less, Since the portion where the knots in the second yaw net are knotted is formed with a thickness of 10000 dtex or more and less than 15500 dtex, and the filling rate of the net yarn is 65% or more and less than 71%. In addition to suppressing an increase in the weight of the raw yarn used, it is possible to form an arrow-proof net suitable for a competition in which the penetrating power of the arrow is relatively high (for example, from the shooting position to the target In archery field events of the distance of about 10m in, arrows through the Boya Internet (penetrate) the can be suppressed).

  According to the mounting structure of the arrow-proof net according to claim 20, in addition to the effect exerted by the mounting structure of the arrow-proof net according to claim 18, the portion where the knots in the mesh thread of the first arrow-proof net are knotted is , Formed with a thickness of 15500 decitex or more and 19000 decitex or less, and a net yarn filling rate of 71% or more and 80% or less. And a mesh formed as an opening surrounded by the mesh, and the mesh is formed as a square raschel mesh, and the mesh yarn of the second arrow-proof net is 6000 dtex or more and 10,000 dtex Since the net yarn is formed with a thickness of less than 55% and less than 65%, the increase in the weight of the yarn used is suppressed and It is possible to form a gauze net suitable for standard competitions (for example, in general archery competitions where the distance from the shooting position to the target is about 70 m, the arrow penetrates the gall net) Can be suppressed).

  According to the mounting structure of the arrow-proof net according to claim 21, in addition to the effect exerted by the mounting structure of the arrow-proof net according to claim 18, the site where the knots in the mesh thread of the first arrow-proof net are knotted is Formed with a thickness of 10000 dtex or more and less than 15500 dtex and a net yarn filling ratio of 65% or more and less than 71%, the second arrow-proof net is an insertion yarn and a loop yarn made of fiber yarns. And a mesh formed as an opening surrounded by the mesh, and the mesh is formed as a square raschel mesh, and the mesh yarn of the second arrow-proof net is 6000 dtex or more and 10,000 dtex Since the net yarn is formed with a thickness of less than 55% and less than 65%, the increase in the weight of the yarn used is suppressed and Tsuriki can form Boya net suitable for relatively low competition (e.g., in competition KazuYumi, arrows through the Boya Internet (penetrate) can be suppressed).

It is a schematic diagram which shows the shooting range in which the arrow prevention net | network in 1st Embodiment of this invention was installed. (A) is the elements on larger scale of an arrow prevention net, (b) is the elements on larger scale which show the state where the arrow penetrated the arrow prevention net of Drawing 2 (a). (A) is a schematic diagram which shows the shooting range where the arrow prevention net in 2nd Embodiment was installed, (b) is sectional drawing of the arrow prevention net in the IIIb-IIIb line | wire of Fig.3 (a). is there. (A) is sectional drawing which shows the state which the arrow penetrated the arrow prevention net of FIG.3 (b), (b) is the table | surface which showed the result of the strength verification test of the arrow prevention net. (A) is sectional drawing of the arrow prevention net in 3rd Embodiment, (b) is sectional drawing which shows the state which the arrow penetrated the 1st arrow prevention net of FIG. 5 (a), ( (c) is sectional drawing which shows the state which the arrow contact | abutted from the state of FIG.5 (b) to the 2nd arrow prevention net.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. First, with reference to FIG. 1, the whole structure of the arrow prevention net | network 1 in 1st Embodiment is demonstrated. FIG. 1 is a schematic diagram showing a shooting range 100 in which an arrow prevention net 1 is installed according to the first embodiment of the present invention. In FIG. 1, the arrow-proof net 1 and the shooting range 100 are schematically illustrated for easy understanding.

  As shown in FIG. 1, the shooting range 100 is a place for shooting archery, and a target 101 is installed in the shooting range 100, and the back side of the target 101 (the back side of the paper in FIG. 1). A pair of struts 102 and a pair of wire ropes 103 installed on the pair of struts 102 are disposed.

  The support column 102 and the wire rope 103 are support members for supporting the arrow-proof net 1. The pair of struts 102 is erected in the vertical direction on the ground of the shooting range 100, and the pair of wire ropes 103 are arranged between the upper ends (the upper end portions in FIG. 1) of the pair of struts 102 and the lower ends (in FIG. 1). It is installed between the lower ends. By means of these columns 102 and wire ropes 103, both ends in the vertical direction of the arrowhead net 1 (upper end and lower end in FIG. 1) and both ends in the horizontal direction (the left and right ends in FIG. 1). Are supported (expanded).

  The arrow-proof net 1 is a net for receiving an arrow deviating from the target 101 by being arranged on the back side of the target 101, and includes an insertion yarn and a loop yarn (both not shown) made of a fiber yarn. ) And a mesh yarn 2 formed by knitting an insertion yarn and a loop yarn, and a mesh 3 formed as an opening surrounded by the mesh yarn 2.

  The original yarn forming the insertion yarn and the loop yarn is made of polyester fiber having a yarn thickness of 1670 dtex, the strength of the yarn is set to 7.3 cN / dT, and the elongation of the yarn is 15%. Is set.

  The mesh yarn 2 is formed by knitting an insertion yarn and a loop yarn, and a knot portion 20 formed as a portion where the mesh yarns 2 are knotted together, and a connecting portion that continuously connects the knot portions 20 21 and a first yarn 22 that connects the connecting portion 21 in a first direction (the left-right direction in FIG. 1; a direction perpendicular to the direction in which the mesh yarn 2 extends (knitting mesh direction)), and the first direction. Is formed at a position facing the first yarn 22 (facing in the space of the mesh 3) in a vertical direction (vertical direction in FIG. 1; extending direction of the mesh yarn 2 (knitting mesh direction)). And a second thread 23 for connecting the continuous portion 21 in the first direction.

  In order to facilitate understanding, in the following description, the first direction (the left-right direction in FIG. 1; the direction perpendicular to the extending direction of the mesh yarn 2) is defined as the left-right direction, and the second direction ( The vertical direction in Fig. 1 is defined as the vertical direction.

  The knot portion 20 is a portion where a plurality of mesh yarns 2 extending in the up-down direction are knotted, and is dotted with a predetermined interval along the up-down direction and the left-right direction. Formed.

  The connecting portion 21 is formed in a posture inclined with respect to the vertical direction, and is a portion where the above-described meandering knot portions 20 are connected to each other. The knot portion 20 and the connecting portion 21 form a mesh 3 as a substantially hexagonal opening (gap). That is, the mesh 3 is formed in a rhombus shape, and the mesh 3 of the rhombus is a gap portion of the arrow prevention net 1, and in this embodiment, the gap of the mesh 3 with respect to the outer area of the arrow prevention net 1 is determined. The ratio is set to 25% (the filling rate of the mesh yarn 2 of the arrow prevention net 1 (the ratio of the actual area of the mesh yarn 2 to the outer area of the arrow prevention net 1) is formed to 75%).

  The first yarn 22 is a portion that connects a pair of connecting portions 21 adjacent to the upper side of the mesh 3, and the second yarn 23 connects a pair of connecting portions 21 that are adjacent to the lower side of the mesh 3. It is a part to do. The first yarn 22 and the second yarn 23 are respectively extended along the left-right direction of the mesh 3, and by forming the first yarn 22 and the second yarn 23, a substantially hexagonal opening portion of the mesh 3 is formed. Becomes a shape close to a circle (substantially octagonal).

  Next, the insertion yarn Y constituting the first yarn 22 and the second yarn 23 will be described with reference to FIG. FIG. 2A is a partially enlarged view of the arrow-proof net 1. 2A, in order to facilitate understanding, among the insertion yarns and loop yarns constituting the mesh yarn 2, the insertion yarns constituting the first yarn 22 and the second yarn 23 in one mesh 3 Only Y is illustrated, and the arrow-proof net 1 is schematically illustrated. In addition, the first yarn 22 and the second yarn 23 in the plurality of other meshes 3 other than the one mesh 3 are also formed from insertion yarns that pass through the same path as the insertion yarn Y.

  As shown in FIG. 2A, the first yarn 22 and the second yarn 23 facing each other in the one mesh 3 are each composed of the same (one) insertion yarn Y. This insertion thread Y is a nodule portion 20 on one side (in the present embodiment, a pair of left-hand sides) of the pair of nodule portions 20 adjacent to one mesh 3 in the left-right direction (left-right direction in FIG. 2A). And knots 20) and a pair of knots 20 adjacent to the mesh 3 in the vertical direction (vertical direction in FIG. 2A).

  More specifically, the insertion thread Y knots the lower knot portion 20 of one mesh 3, and one side continuous portion of the pair of continuous portions 21 connected to the knot portion 20. 21 (in this embodiment, the right side connecting portion 21) extends leftward, whereby the second yarn 23, the continuous portion 21 connected to the left side of the second yarn 23, and the By passing through the first yarn 22 connected to the left side of the continuous portion 21 and the continuous portion 21 connected to the left side of the first yarn 22, the first yarn 22 that faces the sandwiched portion 21 is sandwiched. And the second thread 23 are formed.

  The insertion yarn Y forming the first yarn 22 and the second yarn 23 facing each other with the continuous portion 21 interposed therebetween knots the knot portion 20 located above the first yarn 22 and continues to the knot portion 20. By extending rightward from one continuous portion 21 (in this embodiment, the left continuous portion 21) of the pair of continuous portions 21 provided, the second yarn 23 and its A continuous portion 21 connected to the right side of the second yarn 23, a first yarn 22 connected to the right side of the continuous portion 21, and a continuous portion 21 connected to the right side of the first yarn 22. By passing, the first yarn 22 and the second yarn 23 that are opposed to each other with the continuous portion 21 interposed therebetween are formed. Thereafter, the first yarn 22 and the second yarn 23 are formed while the knot portion 20 is knotted following the same route.

  That is, the insertion yarn Y constituting the first yarn 22 and the second yarn 23 facing each other in the one mesh 3 is the other yarn adjacent to the one mesh 3 on which the first yarn 22 and the second yarn 23 are formed. The first yarn 22 and the second yarn 23 (the other mesh 3 adjacent to the upper left of the one mesh 3) of the two meshes 3 (in the present embodiment, the mesh 3 adjacent to the upper left and lower left of the one mesh 3). The second yarn 23 and the first yarn 22) of the other mesh 3 adjacent to the lower left of the one mesh 3 are formed.

  Here, each of the insertion yarn and the loop yarn is formed from one original yarn (thickness is 1670 dtex), but the loop yarn is knitted while forming an annular loop. The thickness of is substantially the thickness of three yarns. In the present embodiment, the knot portion 20 is formed of two insertion yarns and one loop yarn, and therefore the thickness of the knot portion 20 is the thickness of five original yarns (8350 dtex). .

  On the other hand, the first yarn 22 and the second yarn 23 are formed by the insertion yarn Y (the insertion yarn Y is not knitted along the extending direction of the continuous portion 21 but the continuous portion 21. As a result, the connecting portion 21 is thinner than the knot portion 20 by one insertion yarn (one raw yarn).

  In the claims, “parts where the knot parts in the net yarn are knotted” correspond to parts where the pair of knot parts 20 are knotted. In the present embodiment, the pair of knot parts 20 are connected to each other. The part to be knotted is formed with a thickness of 16700 dtex (since the thickness of one knot 20 is 8350 dtex).

  In this case, it is preferable that the site | part where a pair of nodule part 20 is knotted is formed by the thickness of 10,000 dtex or more and 19000 dtex or less. For example, if it is thinner than 10000 dtex, the mesh gap becomes larger and it is difficult to efficiently absorb the penetrating force of the arrow, and if it is thicker than 19000 dtex, the filling rate becomes excessive and the advantage as a net is impaired. .

  On the other hand, the part where the pair of knot parts 20 are knotted is set to a thickness of 10,000 dtex or more and 19000 dtex or less (16700 dtex in this embodiment), and the filling rate of the net yarn 2 is 65% or more. By setting it to 80% or less (in this embodiment, 75%), while suppressing an increase in the weight of the raw yarn to be used, it has an arrow-proofing capability (inside of the mesh 3 rather than the outer periphery of the arrow A described later) It is possible to form an arrow-proof net 1 having a small circumference. Therefore, the arrow-proof net 1 provided with air permeability and daylighting can be formed at low cost.

  Moreover, it is more preferable to set the site | part to which a pair of knot parts 20 are knotted to the thickness of 15500 decitex or more and 19000 decitex or less, and to set the filling rate of the net yarn 2 to 71% or more and 80% or less. Thereby, even if it is a case where one sheet of arrow prevention net 1 is installed in the back side of target 101, it can control that arrow A penetrates arrow prevention net 1 in the general competition of archery mentioned below (of arrow A) Everything can be taken without penetrating).

  Next, the case where the archery arrow A penetrates the arrow-proof net 1 (mesh 3) will be described with reference to FIG. FIG.2 (b) is the elements on larger scale which show the state which the arrow A penetrated the arrow prevention net | network 1 of Fig.2 (a). In addition, in FIG.2 (b), in order to make an understanding easy, the arrow prevention net | network 1 and the arrow A are typically illustrated.

  As shown in FIG. 2B, when the arrow penetrates the arrow-proof net 1 (mesh 3), the mesh thread 2 forming the mesh 3 is pushed and spreads so that the arrow A is brought into frictional force. Acts and the penetration force of the arrow A is absorbed. In this case, since the mesh 3 is formed as a rhombus mesh, the mesh 3 can have room for deformation as compared to a Russell network in which the mesh is formed as a corner.

  That is, when the arrow A penetrates the mesh 3, the mesh 3 spreads, so that the mesh yarn 2 and the knot portion 20 to which the mesh yarns 2 are knotted can be prevented from breaking immediately. Therefore, since the mesh yarn 2 contacts the outer periphery of the arrow A while the mesh 3 spreads, a frictional force can be efficiently applied to the penetrating arrow A.

  Here, even if the arrow-proof net is formed as a rhombus Russell network, for example, when the arrow A penetrates the mesh, the outer periphery of the arrow A It is difficult to abut the mesh yarn 2 along the entire length, and the frictional force cannot be efficiently applied to the arrow A.

  On the other hand, according to the arrow-proof net 1 of the present embodiment, since the mesh 3 is formed in a substantially hexagonal rhombus, the shape of the mesh 3 is made more nearly circular and the arrow A is efficiently used. A frictional force can be applied.

  Moreover, since the 1st thread | yarn 22 which connects the connection parts 21 which oppose in the left-right direction in the mesh 3 is provided, when the arrow A penetrates the mesh 3, the 1st thread | yarn 22 is made along the outer periphery of the arrow A. It can be made to contact. Therefore, the contact area between the arrow A and the mesh 2 is increased, and the frictional force applied to the arrow A can be increased.

  Furthermore, in addition to the first yarn 22, the first yarn 22 and the mesh 3 are arranged opposite to each other in the vertical direction, and the second yarn 23 that connects the connecting portions 21 is provided. When penetrating, the second thread 23 can be brought into contact with the outer periphery of the arrow A. That is, the first yarn 22 and the second yarn 23 make the shape of the mesh 3 closer to a circle, so that when the arrow A penetrates, the contact area between the arrow A and the mesh yarn 2 is increased. The frictional force applied to the arrow A can be further increased.

  In addition, the first yarn 22 and the second yarn 23 are composed of the same (one) insertion yarn Y, and this insertion yarn Y has a pair of knots 20 adjacent to one mesh 3 in the left-right direction. Among them, since the knot portion 20 on one side and the pair of knot portions 20 adjacent to the mesh 3 in the vertical direction are formed as insertion threads, the arrow A penetrates the mesh 3 and the mesh 3 spreads. The knot portion 20 is drawn toward the mesh 3 side by the first yarn 22 and the second yarn 23.

  That is, at the initial stage when the arrow A penetrates, the mesh 3 has a room for deformation, but when the arrow A begins to penetrate, the knot portion 20 is meshed by the first thread 22 and the second thread 23. The net 3 is increased in rigidity by being drawn toward the third side. Therefore, the high penetrating force in the initial stage through which the arrow A penetrates is absorbed by the mesh 3 having room for deformation, and the penetrating force whose propulsive force is weakened by the arrow A starting to penetrate is increased in rigidity (first The yarn 22 and the second yarn 23 can be absorbed by the mesh 3 (the rigidity is higher than that before the penetration of the arrow A) by pulling the knot 20 to the mesh 3 side.

  In this case, the insertion yarn Y constituting the first yarn 22 and the second yarn 23 facing each other in the one mesh 3 is adjacent to the one mesh 3 on which the first yarn 22 and the second yarn 23 are formed. Since the first yarn 22 and the second yarn 23 are also formed in the other mesh 3, the knot portion 20 can be easily drawn toward the mesh 3 by the first yarn 22 and the second yarn 23. Therefore, the rigidity of the mesh when the mesh 3 spreads can be further increased.

  As described above, according to the arrow prevention net 1 of the present embodiment, the penetrating force of the arrow A can be absorbed efficiently.

  Next, a method for manufacturing the arrow-proof net 1 will be described. The manufacturing method of the arrow-proof net 1 is the same shape as the arrow-proof net 1 described above, and forms a knitted mesh body (before heat treatment is performed and before the arrow-proof net 1 is contracted by heat treatment (raw fabric)). And a heat treatment step of applying heat treatment to the knitted mesh body formed by the knitting mesh step.

  In the knitting netting process, the knitting net body is knitted by a raschel netting machine, and in this embodiment, the knitting net is knitted by an 11 gauge (the number of needles per inch is 11). A heat treatment process is a process performed after a knitting net | network process, 180-190 degree hot air is sent in a heating furnace to the knitted net body knitted by the knitting net | network process, and heat processing is performed. By this heat treatment, the knitted net body contracts to form the arrow-proof net 1 with a net yarn 2 filling rate of 75%.

  Here, when manufacturing the arrow-proof net 1, in the knitting netting process, using a 10 gauge to 12 gauge Russell netting machine, a portion where the pair of knot sections 20 are knotted is a thick portion of 10,000 decitex or more and 19000 decitex or less. It is preferable to perform knitting, and it is more preferable to perform knitting using an 11 gauge Russell machine.

  For example, when a knitted net having a thickness of less than 10,000 dtex is used for a portion where the pair of knot portions 20 are knotted, the thickness of the mesh yarn is reduced, so that the area of the mesh gap increases and the penetration force of the arrow A increases. It becomes difficult to absorb. Moreover, if the site | part to which a pair of nodule parts 20 is knotted thicker than 19000 decitex, a solidification rate will become excess, air permeability and lighting property will fall, and the advantage as a net | network will be impaired.

  Further, when a portion of the knot portion 20 is knitted with a thickness of 10,000 dtex or more and 19000 dtex or less, if a braid is formed by a 9 gauge raschel netting machine, the distance between the needles of the raschel netting machine is wide. Therefore, it becomes difficult to form the mesh yarn with a filling rate of 65% or more and 80% or less (in order to increase the filling rate, it is necessary to make the raw yarn thicker). Further, when knitting with a 13 gauge or larger raschel netting machine, the net yarn filling rate exceeds 80% (the filling rate becomes excessive), and the advantage as a net is impaired. In addition, a 12-gauge or larger raschel netting machine has a narrow interval between needles, and for example, when a knitting net is used with a 1670 decitex yarn, the needle breaks.

  On the other hand, in the knitting net process, using a 10-12 gauge Russell netting machine, the part where the pair of knot parts 20 are knotted is knitted with a thickness of 10,000 dtex or more and 19000 dtex. It is possible to form the arrow-proof net 1 having a net yarn 2 having a filling rate of 65% or more and 80% or less while further suppressing an increase in the weight of the raw yarn (fiber material) to be provided, and thus has air permeability and daylighting. The arrow-proof net 1 can be manufactured at low cost.

  In this case, in this embodiment, since the arrow-proof net 1 is knitted by an 11 gauge raschel netting machine in the knitting netting process, an increase in the weight of the raw yarn to be used can be further suppressed, and air permeability is achieved. And the arrow-proof net 1 provided with daylighting can be manufactured at lower cost. Further, by using an 11 gauge Russell machine, the distance between the needles of the Russell machine becomes wider than 12 gauge, so that the above-described problem that the needle of the Russell machine is broken can be suppressed.

  Next, with reference to FIG. 3, an arrow prevention net 201 according to the second embodiment will be described. In the first embodiment, the case in which one arrow-proof net 1 is supported (expanded) on the support column 102 and the wire rope 103 has been described. However, in the second embodiment, two support elements 102 and the wire rope 103 are provided on the support rod 102 and the wire rope 103. The first arrow prevention net 201A and the second arrow prevention net 201B are supported. In addition, the same code | symbol is attached | subjected to the part same as 1st Embodiment mentioned above, and the description is abbreviate | omitted.

  FIG. 3A is a schematic diagram showing a shooting range 100 in which the arrow-proof net 201 according to the second embodiment is installed, and FIG. 3B is a cross-sectional view taken along line IIIb-IIIb in FIG. 2 is a cross-sectional view of an arrow net 201. FIG. In FIG. 3, the arrow-proof net 201 and the shooting range 100 are schematically illustrated for easy understanding.

  As shown in FIG. 3, the arrow prevention net 201 has a first arrow prevention net 201A disposed on the shooting side (target 101 side) and an opposite side to the shooting side of the first arrow prevention net 201A. The second arrow prevention net 201B is provided on the back side, and the first arrow prevention net 201A and the second arrow prevention net 201B are provided in close contact with each other.

  The first arrow prevention net 201A is formed with the same configuration as the arrow prevention net 1 of the first embodiment, and the second arrow prevention net 201B is a net having lower rigidity (easily flexible) than the first arrow prevention net 201A. It is formed. More specifically, the second arrow-proof net 201B has a thickness of 14000 decitex where the paired nodule portions 20 are connected to each other, and has a solidity rate of 68%. It is set as the same structure as 1 arrowhead net | network 201A.

  Next, a case where an arrow penetrates the arrow prevention net 201 will be described with reference to FIG. Fig.4 (a) is sectional drawing which shows the state which the arrow penetrated the arrow prevention net | network 201 of FIG.3 (b). In FIG. 4A, the arrow-proof net 201 and the arrow A are schematically illustrated for easy understanding.

  As shown in FIG. 4A, when an arrow pierces the arrow prevention net 201, the arrow A penetrating the first arrow prevention net 201A comes into contact with the second arrow prevention net 201B. In this case, since the rigidity of the second arrow prevention net 201B provided on the back side is set lower than the first arrow prevention net 201A provided on the shooting side, the penetration at the initial stage where the arrow A is stuck is high. The arrow A in which the force is absorbed by the first arrow prevention net 201A and the penetration force is weakened by the first arrow prevention net 201A can be received by the second arrow prevention net 201B.

  That is, since the second arrow prevention net 201B is formed to be lower in rigidity than the first arrow prevention net 201A, the second arrow prevention net 201B is easily bent, so that the load due to the penetration force of the arrow A is received by the entire second arrow prevention net 201B. . Therefore, the penetration force of the arrow A can be absorbed efficiently.

  Moreover, since the high penetration force of the initial stage which the arrow A stabs is absorbed by the 1st arrow prevention net | network 201A, the rigidity of the 2nd arrow prevention net | network 201B can be set low correspondingly. That is, as in the present embodiment, the thickness (14000 decitex in the present embodiment) of the portion where the pair of nodule portions 20 of the second arrow prevention net 201B is knotted is set to the value of the first arrow prevention net 201A. Since the thickness of the part where the pair of knot parts 20 are knotted (16700 dtex in the present embodiment) can be made thinner (the filling rate is lowered), the arrow-proofing ability of the arrow-proof net 201 is reduced. It is possible to reduce the weight of the second arrow-proof net 201B (increase air permeability and daylighting performance) while suppressing this. Therefore, the installation cost of the arrow prevention net 201 can be suppressed.

  Here, there are a plurality of types of archery competition, and the distance from the shooting position to the target 101 is different for each competition. For example, the distance from the shooting position to the target 101 is set to about 70 m in the general game of archery, while the field game of archery is set to 10 to 60 m, and is set to about 18 m in the indoor game. When the arrow prevention net 201 is arranged on the back side of the target 101, it is necessary to increase the arrow prevention ability of the arrow prevention net 201 correspondingly when the distance from the shooting position to the target 101 becomes shorter. Moreover, if the distance from the shooting position to the target 101 is increased, the arrow-proofing capability may be excessive.

  In this case, the thickness of the portion where the pair of knot portions 20 of the first arrow-proof net 201A is knotted is formed with a thickness of 15500 dtex or more and 19000 dtex or less, and the filling rate of the net yarn 2 is 71% or more. It is formed with less than 80% (the other structure is formed with the same structure as the arrowhead net 1), and the thickness of the part where the pair of nodule portions 20 of the second arrowhead net 201B is connected is 10000 decitex or more and 15500 By being formed with a thickness of less than decitex and with a filling rate of the net yarn 2 of 65% or more and less than 71% (other configurations are formed with the same configuration as the arrowhead net 1), for example, Even if the distance from the shooting position to the target 101 is set to 10 m in the field competition, the arrow A can penetrate (pierce through) the arrow-proof net 201. Can be suppressed (while suppressing the excessive enhancement ratio of Boya net 201, it can be formed Boya net 201 that is suitable for field events).

  Next, with reference to FIG. 4B, the difference in strength of the arrow prevention net 201 depending on how the first arrow prevention net 201A and the second arrow prevention net 201B are attached will be described. FIG. 4B is a table showing the results of a strength verification test (hereinafter referred to as “test”) of the arrow-proof net 201. In this test, the first arrow prevention net 201A or the second arrow prevention net 201B is disposed in close contact with the shooting side and the back side of the arrow prevention net 201, and the arrow A is directed to the surface on the shooting side. Shoot. In the test, the arrow A net 201 was fired 10 times with the arrow A, and the average penetration distance of the arrow A from the back side of the arrow prevention net 201 (see the penetration distance column in FIG. 4B). Reference) was calculated.

  As shown in FIG. 4B, the average penetration distance of the arrow A when the two first arrow-proof nets 201A are attached in an overlapping manner is 289 mm, whereas the two second arrow-proof nets 201B are overlapped. The average penetration distance of the arrow A was 336 mm. That is, the penetrating force of the arrow A can be more effectively absorbed when two first stiffener nets 201A having higher rigidity are stacked.

  On the other hand, when two sheets of the first arrow prevention net 201A and the second arrow prevention net 201B are stacked, the average penetration distance of the arrow A when the first arrow prevention net 201A is attached to the shooting side is 307 mm. However, the average penetration distance of the arrow A when the second arrow prevention net 201B was attached to the hit side was 326 mm. That is, when the first arrow prevention net 201A and the second arrow prevention net 201B having different rigidity (easiness of bending) are attached to each other like the arrow prevention net 201 of the second embodiment, the first arrow prevention arrow having high rigidity is attached. The penetrating force of the arrow A can be efficiently absorbed by disposing the net 201A on the irradiated side and disposing the second arrow-proof net 201B having a lower rigidity than that on the back side.

  Next, with reference to FIG. 5, the arrow prevention net 301 of the third embodiment will be described. In the second embodiment, the case where the first arrow prevention net 201A and the second arrow prevention net 201B are disposed in close contact with each other has been described, but in the third embodiment, the first arrow prevention net 301A and the second arrow prevention net 201A are arranged. Two arrow prevention nets 301B are disposed in a state of being separated from each other on the shooting side and the back side. In addition, the same code | symbol is attached | subjected to the part same as each embodiment mentioned above, and the description is abbreviate | omitted.

  Fig.5 (a) is sectional drawing of the arrow prevention net | network 301 in 3rd Embodiment, FIG.5 (b) shows the state which the arrow A penetrated the 1st arrow prevention net | network 301A of Fig.5 (a). FIG. 5C is a cross-sectional view showing a state in which the arrow A is in contact with the second arrow prevention net 301B from the state of FIG. 5B. In FIG. 5, the arrow prevention net 301 and the arrow A are schematically illustrated for easy understanding.

  As shown in FIG. 5, the arrow prevention net 301 includes a first arrow prevention net 301 </ b> A disposed on the shooting side (target 101 side) and an opposite side to the shooting side of the first arrow prevention net 301 </ b> A. A second arrow prevention net 301B provided on the back side is provided, and the first arrow prevention net 301A and the second arrow prevention net 301B are provided in a state of being separated from each other on the shooting side and the rear side.

  The first arrow prevention net 301A is formed from the same configuration as the first arrow prevention net 201A, and the second arrow prevention net 301B is formed from the same configuration as the second arrow prevention net 201B. In addition, the interval (separating distance) between the first arrow prevention net 301A and the second arrow prevention net 301B is set to 500 mm.

  In this case, since the first arrow prevention net 301A and the second arrow prevention net 301B are disposed separately on the shooting side and the rear side, the arrow A penetrating the first arrow prevention net 301A has its thrust. Is weakened, and the incident angle of the arrow A with respect to the second arrow-proof net 301B is likely to be larger than the incident angle with respect to the first arrow-proof net 301A. Therefore, it can suppress that the penetration force of arrow A concentrates on one point of the 2nd arrow prevention net | network 301B, and can raise the effect of the impact absorption by the bending of 2nd arrow prevention net | network 301B.

  Although the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment, and various modifications can be easily made without departing from the spirit of the present invention. Can be inferred.

  In each of the above embodiments, the case where the mesh 3 is formed in a substantially hexagonal rhombus has been described. However, the present invention is not necessarily limited thereto, and may be a polygon other than a hexagon, for example. It may be circular. That is, the shape of the mesh is not limited as long as the knots 20 are formed in a meandering manner, but it is preferable to make the shape closer to a circle.

  In each of the above embodiments, the case where the first yarn 22 and the second yarn 23 are connected to the connecting portion 21 (the first yarn 22 and the second yarn 23 are formed in one mesh 3) has been described. However, the present invention is not necessarily limited to this. For example, a configuration in which only the first yarn 22 is connected to the connecting portion 21 may be employed. Also in this case, when the arrow A penetrates the mesh 3, the first thread 22 can be brought into contact with the outer periphery of the arrow A. Therefore, for example, the contact area between the arrow A and the mesh thread 2 is increased, and the frictional force applied to the arrow A can be increased as compared with the case where the mesh is formed as a square diamond.

  In each of the above embodiments, a case has been described in which the first yarn 22 and the second yarn 23 facing each other in the one mesh 3 are each composed of the same (single) insertion yarn Y. For example, the first yarn 22 and the second yarn 23 that face each other in the mesh 3 may be composed of different insertion yarns and loop yarns.

  In each of the above embodiments, the insertion yarn Y forms the first yarn 22 and the second yarn 23 in one mesh 3, and the first yarn of the other two meshes 3 adjacent to the one mesh 3. Although the case where it is the thread | yarn which forms 22 and the 2nd thread | yarn 23 was demonstrated, it is not necessarily restricted to this. For example, only the first yarn 22 and the second yarn 23 in one mesh 3 may be formed by one insertion yarn.

  In other words, the knot portion 20 on the lower side of the mesh 3 is knotted by one insertion thread, and one side (for example, the right side) of the pair of linked portions 21 connected to the knot portion 20 is connected. The knot portion 20 that extends in the left direction from the installation portion 21, passes through the second yarn 23 and the continuous portion 21 connected to the left side of the second yarn 23, and is connected to the upper side of the continuous portion 21. It is also possible to use a configuration in which Also in this case, when the arrow A penetrates the mesh 3, the mesh 3 spreads, whereby the first thread 22 and the second thread 23 draw the knot portion 20 toward the mesh 3, and the mesh when the mesh 3 spreads. 3 can be increased in rigidity.

  In each of the above-described embodiments, the case where the mesh yarn 2 (insertion yarn and loop yarn) is formed from polyester fiber is described. However, the present invention is not necessarily limited to this, for example, synthetic fiber such as nylon fiber or polyethylene fiber. There may be.

  In each of the above-described embodiments, the case where the arrow-proof nets 1, 201, 301 are disposed on the back side of the target 101 and supported (stretched) by the support column 102 and the wire rope 103 has been described, but the present invention is not necessarily limited thereto. For example, the arrow-proof nets 1, 201, 301 may be disposed on the side surface or ceiling surface of the shooting range 100 (surface parallel to the shooting direction). Moreover, the structure which hangs the arrow-proof nets 1,201,301 from a ceiling surface with a support member may be sufficient.

  In each of the above-described embodiments, the case where the arrow-proof nets 1, 201, 301 are installed in the shooting range 100 for shooting archery is not necessarily limited to this. 201 and 301 can be employed in any shooting range as long as the game uses arrows. One example is the installation of arrowhead nets 1, 201, 301 in a Japanese archery archery.

  In each of the above embodiments, the case where the first yarn 22 and the second yarn 23 facing each other in the one mesh 3 are formed from one insertion yarn Y has been described, but the present invention is not necessarily limited thereto. For example, the first yarn 22 and the second yarn 23 may be formed of a plurality of insertion yarns or loop yarns.

  In the said 2nd Embodiment, although the case where the 1st arrow prevention net | network 201A and the 2nd arrow prevention net | network 201B were formed from a rhombus Russell network was demonstrated, it is not necessarily restricted to this, The outer periphery of arrow A As long as the inner diameter of the mesh is smaller than that of the mesh, the mesh may be formed from any mesh. Even in this case, when the two nets having different rigidity are attached, the penetrating force of the arrow A can be efficiently absorbed by arranging the high rigidity net on the shooting side.

  Further, the thickness of the portion where the pair of knot portions 20 of the first arrow-proof net 201A is knotted is formed with a thickness of 15500 dtex or more and 19000 dtex or less, and the filling rate of the net yarn 2 is 71% or more and 80% or more. (The other configuration is the same as that of the arrow-proof net 1), and the second arrow-proof net 201B may be formed of a square Russell network. In this case, it is preferable that the net yarn 2 of the second arrow-proof net 201B is formed with a thickness of 6000 dtex or more and less than 10,000 dtex, and the filling rate of the net yarn 2 is set to 55% or more and less than 65%. .

  Thereby, for example, when the distance from the shooting position to the target 101 is set to 70 m in the above-described general archery competition, the arrow A can be prevented from penetrating (penetrating) the arrow prevention net 201 (the arrow prevention net). It is possible to form an arrow-proof net 201 suitable for general competitions while suppressing an excess of the fullness of 201).

  In the second embodiment, the thickness of the portion where the pair of knot portions 20 of the first arrow-proof net 201A is knotted is formed with a thickness of 15500 dtex or more and 19000 dtex or less, and the net yarn 2 is enhanced. Although the case where the rate is 71% or more and less than 80% (other configurations are formed with the same configuration as the arrow-proof net 1) has been described, the present invention is not necessarily limited thereto. The part where the pair of knots 20 of the arrow net 201A is knotted is formed with a thickness of 10,000 dtex or more and less than 15500 dtex, and the filling rate of the net yarn 2 is 65% or more and less than 71% (other configurations are It may be formed (with the same configuration as the arrow-proof net 1).

  In this case, the second arrow-proof net 201B is formed from a square Russell net, the net yarn 2 is formed with a thickness of 6000 dtex or more and less than 10,000 dtex, and the filling rate of the net yarn 2 is 55% or more and 65 It is preferable to set it to less than%. Thereby, for example, in a Japanese archery competition, the arrow A can be prevented from penetrating (penetrating) the pierced net 201 (suitable for a Japanese archery competition while suppressing an excess of the solidification rate of the arrow proof net 201. The arrow-proof net 201 can be formed).

  In the third embodiment, the case has been described in which the interval (separation distance) between the first arrow prevention net 301A and the second arrow prevention net 301B is set to 500 mm, but the present invention is not necessarily limited thereto. For example, it is preferable that the interval (separating distance) between the first arrow prevention net 301A and the second arrow prevention net 301B is set to approximately 600 mm or less. The “approximately” of approximately 600 mm is intended to allow tolerance when the arrow prevention net 301 is attached, and is defined as a range of 630 mm or less.

  Thereby, since the space | interval of the 1st arrow prevention net 301A and the 2nd arrow prevention net 301B can be adjusted according to the penetration force of the arrow A assumed, the installation space which the arrow prevention net 301 occupies is minimized. Can be suppressed.

  In addition, the general arrow A is formed with a length of about 700 mm, and the shaft portion of the arrow A is formed in a barrel shape (both ends are narrower than the center of the shaft). The frictional force is applied only to the portion from the tip of the arrow A to approximately 600 mm. Therefore, if the interval between the first arrow prevention net 301A and the second arrow prevention net 301B is longer than about 600 mm, the installation space for the arrow prevention net 301 increases (excessive).

  On the other hand, by setting the interval (separating distance) between the first arrow prevention net 301A and the second arrow prevention net 301B to approximately 600 mm or less (that is, in the range of 0 to approximately 600 mm), the penetration of the arrow A is achieved. The installation cost of the arrow-proof net 301 can be suppressed while absorbing force efficiently.

1,201,301 Arrow-proof net 2 Net yarn 20 Knot portion 21 Continuous portion 22 First yarn 23 Second yarn 102 Strut (support member)
103 Wire rope (support member)
201A, 301A First arrow prevention net 201B, 301B Second arrow prevention net Y Insertion yarn constituting the first and second yarns

Claims (21)

An arrow-proof net comprising a mesh thread formed from an insertion thread and a loop thread composed of an original thread of fiber material, and a mesh formed as an opening surrounded by the mesh thread,
An arrow-proof net characterized in that the mesh is formed in a rhombus.   The mesh yarn is connected to a knot portion where the mesh yarns are knotted, a connecting portion where the knot portions are connected to each other, and the connecting portions facing each other in the mesh in the first direction. The arrow prevention net according to claim 1 provided with 1 thread.   The mesh yarn includes a second yarn that connects the first yarn and the connecting portions facing each other in the mesh in a second direction which is a direction orthogonal to the first direction. The arrowhead net according to claim 2. The first yarn and the second yarn in the mesh are each composed of the same insertion yarn,
The insertion yarn constituting the first yarn and the second yarn in the mesh knots a pair of knots adjacent to the mesh on one side in the first direction and the mesh on both sides in the second direction. The arrow-proof net according to claim 3, wherein a pair of knot portions adjacent to each other are knotted.   The insertion yarns constituting the first yarn and the second yarn in the mesh are the first yarn and the second yarn in two meshes adjacent to the mesh where the first yarn and the second yarn are formed. The arrow prevention net according to claim 4 formed. The site where the knots in the mesh thread are knotted is formed with a thickness of 10000 dtex or more and 19000 dtex or less,
6. The arrow-proof net according to claim 5, wherein the net yarn has a solidity ratio of 65% to 80%. A method of manufacturing an arrow-proof net comprising a mesh yarn formed from an insertion yarn and a loop yarn made of a raw yarn of a fiber material, and a mesh formed as an opening surrounded by the mesh yarn, and knitted by a Russell mesh machine Because
A method for manufacturing an arrow-proof net, comprising a knitting net process for forming the mesh into a rhombus.   In the knitting netting process, a knot portion where the net yarns are knotted, a connecting portion connecting the knot portions, and a connecting portion facing each other in the mesh in the first direction are connected. The method for producing an arrow-proof net according to claim 7, wherein one yarn is knitted.   The knitting netting step includes knitting a second yarn that connects the first yarn and the connecting portions facing each other in the mesh in a second direction that is a direction orthogonal to the first direction. The method for manufacturing an arrow-proof net according to claim 8, characterized in that:   In the knitting netting process, the first yarn and the second yarn in the mesh are each knitted from the same insertion yarn, and the insertion yarn adjoins the mesh on one side in the first direction. The method for manufacturing an arrow-proof net according to claim 9, wherein the knot portion is knotted, and a pair of knot portions adjacent to the mesh are knotted on both sides in the second direction.   In the knitting mesh step, the first yarn in the two meshes adjacent to the mesh in which the first yarn and the second yarn are formed by the insertion yarn constituting the first yarn and the second yarn in the mesh. The method for producing an arrow-proof net according to claim 10, wherein the second yarn is knitted. A heat treatment step that is performed after the knitting mesh step and heat-treats the knitted mesh body knitted by the knitting mesh step;
The knitting netting process is characterized in that a portion of the net yarn where the knots are knotted is knitted to a thickness of 10000 dtex or more and 19000 dtex or less by a 10-12 gauge raschel netting machine. 11. A method for producing an arrow-proof net according to 11.   13. The method for manufacturing an arrow-proof net according to claim 12, wherein the knitting netting step is performed by an 11 gauge raschel netting machine. In the mounting structure of the arrow-proof net that is extended to the support member,
The first arrow prevention net disposed on the target side and the first arrow prevention net disposed on the back side opposite to the target side and formed to have lower rigidity than the first arrow prevention net. And a second arrow-proof net.   The mounting structure of the arrow-proof net according to claim 14, wherein the first arrow-proof net and the second arrow-proof net are arranged separately from each other on the shooting side and the back side.   The mounting structure of the arrow prevention net according to claim 15, wherein an interval between the first arrow prevention net and the second arrow prevention net is set to about 600 mm or less.   The said 1st arrow prevention net is comprised from the arrow prevention net in any one of Claims 1-6, The attachment structure of the arrow prevention net in any one of Claims 14-16 characterized by the above-mentioned. The first arrow prevention net is constituted by the arrow prevention net according to claim 6,
18. The arrow-proof net according to claim 17, wherein a filling rate of the mesh yarn surrounding the mesh of the second arrow-proofing net is lower than a filling rate of the mesh yarn of the first arrow-proofing net. Mounting structure. The second arrow prevention net is constituted by the arrow prevention net according to claim 6,
The part where the knots in the mesh yarn of the first arrow-proof net are knotted is formed with a thickness of 15500 dtex or more and 19000 dtex or less, and the filling rate of the mesh yarn is 71% or more and 80% or less. Formed,
The part where the knots in the mesh of the second arrow-proof net are knotted is formed with a thickness of 10000 dtex or more and less than 15500 dtex, and the filling rate of the mesh yarn is 65% or more and less than 71%. 19. The structure for attaching an arrow-proof net according to claim 18, wherein the structure is formed. The part where the knots in the mesh yarn of the first arrow-proof net are knotted is formed with a thickness of 15500 dtex or more and 19000 dtex or less, and the filling rate of the mesh yarn is 71% or more and 80% or less. Formed,
The second arrow-proof net includes an insertion thread made of an original yarn of fiber material and a mesh thread formed from a loop thread, and a mesh formed as an opening surrounded by the mesh thread, the mesh being a square mesh Formed as a Russell net,
The mesh thread of the second arrow-proof net is formed with a thickness of 6000 decitex or more and less than 10,000 decitex, and a filling rate of the mesh thread is formed of 55% or more and less than 65%. 18. A mounting structure of the arrow-proof net according to 18. The part where the knots in the mesh yarn of the first arrow-proof net are knotted is formed with a thickness of 10000 dtex or more and less than 15500 dtex, and the filling rate of the mesh yarn is 65% or more and less than 71%. Formed,
The second arrow-proof net includes an insertion thread made of an original yarn of fiber material and a mesh thread formed from a loop thread, and a mesh formed as an opening surrounded by the mesh thread, the mesh being a square mesh Formed as a Russell net,
The mesh thread of the second arrow-proof net is formed with a thickness of 6000 decitex or more and less than 10,000 decitex, and a filling rate of the mesh thread is formed of 55% or more and less than 65%. 18. A mounting structure of the arrow-proof net according to 18.

Images