KR20030043561A - Manufacture device of barbed-wire entanglements - Google Patents

Abstract

PURPOSE: A barbed wire entanglement, a wire entanglement and an apparatus for manufacturing the same are provided to improve endurance of the barbed wire entanglement against external impact by forming the barbed wire entanglement through twisted warp and weft wires. CONSTITUTION: A barbed wire entanglement manufacturing apparatus includes a feeding section fixedly supported by a fixing die, a twist section(20), a weft wire feeding section, a barbed wire feeding section, and a conveying section(60). The twist section(20) has a driving gear engaged with a rack gear, which is longitudinally driven by means of a first motor, a pressing plate provided at a front of the twist section(20), and a barb forming pin coupled to both sides of the twist section(20). The weft wire feeding section is formed at a front frame thereof with a V-shaped cutter, which is longitudinally driven by means of a first cylinder. A rack is transversely installed on the weft wire feeding section. The barbed wire feeding section is aligned while forming an angle of 45 degrees with respect to the twist section(20). The conveying section(60) conveys a barbed wire pressing member in front and rear directions.

Description

Barbed wire and wire mesh and manufacturing apparatus thereof {MANUFACTURE DEVICE OF BARBED-WIRE ENTANGLEMENTS}

The present invention relates to a barbed wire mesh and a wire mesh and its manufacturing apparatus, and more specifically, is installed on the upper portion of the fence or fence, etc., to add the magnificence of the appearance of the iron fence and to prevent intrusion or to prevent or identify the intrusion By standardizing mass production of wire mesh, it improves productivity and workability, and by twisting two wires, it manufactures barbed wire with excellent durability and durability as well as twisting of barbed wire supplied in the manufacture of barbed wire The present invention relates to a barbed wire manufacturing apparatus capable of preventing a smooth supply, and manufacturing wire mesh, rebar mesh and wire mesh fences that can be used for reinforcing bars when building a building.

In general, fences used as boundary fences are constructed and extended at fixed heights where fences are used as boundary fences, such as public offices, large laboratories, power plants, etc. Barbed wire mesh extending in the longitudinal direction is installed on both sides of the upper pillar of the 'Y' shape.

The barbed wire mesh has a shape in which one side of the barbed wire is complexly curved so that one side cross-sectional shape has a circular shape, and the contact part is fixed by tightening a fastener such as a separate link. The wires are crossed in the longitudinal and transverse directions to form a checkerboard-shaped wire mesh, and the barbed wire is woven to the intersection of the wires to form a barbed wire.

Here, the wire supplied in the longitudinal direction is called a string, and the wire supplied in the lateral direction is called a blade.

However, in the conventional barbed wire mesh as described above, the barbed wire is woven into the area where the wires intersect to tighten the fastener to form a barbed wire, which makes the sphere very difficult and cumbersome, resulting in poor workability and productivity. The gap between the two is formed so large that it loses its function for blocking intrusion, and so on.

Meanwhile, in constructing various buildings, a wire mesh used as a reinforcing steel material to improve durability and robustness of a building has a checkerboard shape by crossing a string and a string having a predetermined thickness in a vertical and horizontal direction, and then the string and a string It consists of a combination of spot welding the intersection of.

Such a wire mesh is mainly used in building slabs of a building, and is installed in concrete to be poured, and general reinforcing bars are used for building foundations or columns.

However, the wire mesh as described above is made of relatively thin wire and has a disadvantage that it is vulnerable to external impact because the intersection portion is coupled by spot welding, and in particular, the intersection portion coupled by spot welding is weak due to its weakness. Problems such as detachment and damage are easily caused by impacts.

The present invention is to solve the problems occurring in the closed end and the wire mesh that is held in the conventional barbed wire as described above, the object is to produce a checkered barbed wire mesh and wire mesh by longitudinally and crosswise the string Twist each strand and blade fed in the longitudinal and transverse directions so that they are twisted to improve the tightness of the wire and feed the twisted and twisted strings and blades in the longitudinal and transverse directions. It is possible to improve the cohesion between them by interlacing the blades fed in the direction by the strings fed in the lateral direction, and to form a plurality of visible parts by barbed wire at equal intervals on each of the strings and the wires. As the wire mesh used for reinforcing steel is manufactured from twisted strands and blades, the external impact of the wire mesh Configuration and the barbed wire of the new form to improve the robustness and wire mesh, and is intended to provide a manufacturing apparatus.

In order to achieve the above object, the barbed wire manufacturing apparatus according to the present invention is supported and fixed by a fixed die, the rotating shaft is installed to enable forward and reverse rotation with the power unit and the chain, the rotating shaft has a certain length and in the form of a roll The supply part is installed by the fastener so that the wound barbed wire can be moved along the support shaft, and the support shaft is pivoted on the rotating shaft, and the supply unit is installed to restrain (stop) the rotation operation by the brake lining provided with the brake pad and the speed adjusting bolt. And, the drive gear meshed with the rack reciprocally driven in the longitudinal direction by the first electric motor rotated forward and reverse at a constant cycle is rotated and coupled to the front surface of the rotating body, the pressing plate is mounted on the front side by the support rod and the spring And both sides are coupled to the visible forming pin, the end of which is bent in a ring shape, the rotating body and the drive gear Is a twisted portion in which a through hole having a predetermined radius of curvature is communicated, and a 'V' shaped cutter driven up and down by a first cylinder is installed at the center of the front frame, and the screw is rotated by a second electric motor. By the guide rail along the guide rail transfer die installed is driven forward and backward, engaged with the pinion rotated by a third electric motor installed on one end of the transfer die, the operating rod is driven by the second cylinder The 'c' shaped rack is installed in the transverse direction, and the front end of the rack is provided with a string feeder installed with tongs driven by the operating rod, an electric gear driven by a fourth electric motor and driven gear and driven gear. Is rotated, but the driven gear is installed so that the eccentric cam and the cutting blade are interlocked, and the electric roller is coupled to the electric gear to supply and fix the barbed wire. · Barbed wire feeder installed to be 을 45 ° on both sides from the center of the drive gear of the twisted part so that it can be cut, and a rack is installed along the main frame with a fixed length and rotated by the fifth electric motor. Coupled to both ends of the rotary shaft connected to the gear and the driven gear is characterized by having a transfer unit for driving the barbed wire crimping piece forward and backward by the pinion engaged with the rack.

In the present invention as described above, the supply portion has a feature that a plurality of orthodontic rollers for straightening the bending or bending portion of the barbed wire is supplied by the pedestal.

In addition, the twist and twisted by the string and the string is twisted, respectively, each of the string and the string has a characteristic that the barbed wire mesh and wire mesh is formed in the visible portion at a predetermined interval.

1 is a perspective view showing a barbed wire manufacturing apparatus according to the present invention,

2 is a plan view showing a barbed wire manufacturing apparatus according to the present invention,

3 is an enlarged perspective view of main parts of a barbed wire manufacturing apparatus according to the present invention;

4 is a perspective view showing the seed line supply of the barbed wire manufacturing apparatus according to the present invention,

5 is an enlarged view of a portion A of FIG. 2;

6 is a partially enlarged bottom perspective view of a barbed wire manufacturing apparatus according to the present invention;

7 is an enlarged view of a portion B of FIG. 4;

8 is a perspective view illustrating a winding part of a barbed wire manufacturing apparatus according to the present invention;

9 is a perspective view showing a barbed wire supply unit of the barbed wire manufacturing apparatus according to the present invention,

10 is an enlarged cross-sectional view of main parts of a barbed wire supply unit according to the present invention;

11 is a schematic view showing another embodiment of the barbed wire supply unit of the barbed wire manufacturing apparatus according to the present invention,

12 is a plan view showing the main portion of the barbed wire according to the present invention,

13 is a plan view showing the main portion of the wire mesh according to the present invention,

14 is a perspective view illustrating main parts extracting according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: manufacturer 2: main frame

4: front frame 5: guide

10: Supply part 11: driven shaft

12: fixed die 13: rotary shaft

14: support shaft 15: clamp

16: Brake pad 17: Speed adjustment bolt

18: Brake lining 19: Stand

20, 20 ': Twist part 22, 39, 61: Rack

23: drive gear 24: rotating body

25: support rod 26: spring

27: pressing plate 28: visible molding pin

30: seed feeder 32: cutter

33: screw 34: guide rail

35: Isong die 37, 65: Pinion

38: working rod 40: tongs

50: barbed wire feeder 51: cam

52: cutter 60: transfer part

62: electric gear 63: driven gear

64: rotating shaft 66: pressing plate

70: winding part 100: barbed wire

200: wire mesh 300: steel wire mesh

301: protrusion

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 to 8, the twist portion 20 of the barbed wire manufacturing apparatus 1 according to the present invention is reciprocated in the longitudinal direction by the first electric motor (M1) is rotated forward and reverse at a constant cycle The drive gear 23 meshed with the driven rack 22 is rotated and coupled to the front surface of the rotating body 24, and the support plate 25 and the spring 26 are pressed on one side of the front surface of the drive gear 23. (27) is coalesced, and both sides are coupled to the visible forming pin 28, the tip of which is bent in a ring shape, and the through hole (29) having a predetermined radius of curvature is connected to the rotating body (24) and the drive gear (23). The blade (Y) is supplied, the seed feeder (30) is installed in the center of the front frame (4) 'V' shaped cutter 32 is driven up and down by the first cylinder (CY1) The transfer die 35 in which the twist portion 20 'is installed along the guide rail 34 by the screw 33 rotated by the electric motor M2 is transferred. An operating rod 38 driven backward by a second cylinder CY2 is engaged with the pinion 37 which is driven backward by a third electric motor M3 installed at one end of the transfer die 35. The 'c' shaped rack 39 is installed in the transverse direction, the front end of the rack 39, the tongs 40 driven by the operating rod 38 is installed, barbed wire feeder 50 Is rotated by the electric gear (G1) and the driven gear (G2) and the driven gear (G3) is rotated by the fourth electric motor (M4), the cam 51 and the cutting blade to the driven gear (G2) 52 is installed so as to interlock and the driving roller R1 is coupled to the electric gear (G1) to the center of the drive gear 23 of the twist portion 20 to supply, form and cut the visible wire (W) It is installed to achieve ∠45 ° on both sides starting from.

At this time, the size of the through-hole 29 penetrating the rotating body 23 and the drive gear 24 is adjusted according to the diameter of the blade and the line to be used.

In addition, the transfer unit 60 is a rotation shaft connected to the electric gear 62 and the driven gear 63, the rack 61 is installed to a predetermined length along the main frame 2 and is rotated by the fifth electric motor (M5). The barbed wire crimping piece 66 is driven forward and backward by a pinion 65 which is coupled to both ends of the 64 and meshes with the rack 61, and the winding part 70 is driven from the center of the support plate 71. The fixed shaft 72 is fixed to form a horizontal state in one side and the inner tube 74 is coupled to both ends of the fixed shaft 72 by a bearing and the coupling 73 is coupled to the front end, the inner tube ( The outer circumferential surface of one side of 74) is inserted into the outer shell 75, and the first ratchet gear LW1 and the first ratchet L1 are coupled to both ends of the inner tube 74, and the ratchet gear LW2 is disposed at both ends of the outer shell. And ratchet (L2) is coupled and the drive filling motor (M) is rotated in the range of 90 ° by the rotary shaft 76 and the rotary plate 77 by the coupling 73 It is coupled to the inner tube (72).

At this time, the first ratchet gear (LW1) and the second ratchet gear (LW2) is installed to prevent the reverse rotation in the opposite direction to each other.

9 is a perspective view showing a barbed wire supply unit of the barbed wire manufacturing apparatus according to the present invention, Figure 10 is an enlarged cross-sectional view of the main portion of the barbed wire supply unit according to the present invention, the supply unit 10 of the barbed wire manufacturing apparatus 1 is fixed Supported and fixed by the die 12, the rotating shaft 13 is provided to enable forward and reverse rotation by the power unit (not shown in the figure) and the chain (C), the rotating shaft 13 has a certain length and roll form Wound wire (W) is wound by the fastener 15 is mounted so as to move along the support shaft 14, the support shaft 14 is installed on the rotating shaft 13 is rotated, the brake pad (16) And by the brake lining 18 is provided with a speed adjusting bolt 17 is shown that the rotational movement is restrained (stop).

In addition, the barbed wire (W) supplied to the twisted portion 20 by the supply unit 10 is bent or bent by the plurality of orthogonal rollers (RR) installed by the pedestal 19 is straightened. .

At this time, the supply unit 10 is installed to be close to the rear of the twisted portion 20 by a separate support means (not shown in the figure), the rotary shaft 13 is a chain (C) in the power unit (in the figure (Not shown) is rotated to be rotated forward and reverse, and the fastener 15 is moved along the support shaft 14 according to the inner diameter of the barbed wire W wound in a roll shape, thereby making a solid mounting.

11 is a schematic view showing another embodiment of the barbed wire supply unit of the barbed wire manufacturing apparatus according to the present invention, is connected to the chain (C) is installed on the rotating shaft 13 installed on the fixed die 12 to rotate forward and reverse The barbed wire W wound in a roll shape by one driving wheel WH1 is mounted, and the barbed wire wound in a roll shape by a second drive wheel WH2 at an upper end at a rear of the rotary shaft 13 at a predetermined distance. (W) is mounted on the lower side and the brake pad 16 and the speed adjusting bolt 17 is provided that the driven shaft 11 is coupled to the brake lining 18 is provided.

At this time, the visible wire (W) attached to the upper end of the driven shaft 11 is fed through the front end of the rotary shaft (13).

12 is a plan view showing the main portion of the barbed wire mesh according to the present invention, Figure 13 is a plan view showing the main portion of the wire mesh according to the present invention, the barbed wire mesh 100 is seeded by the manufacturing apparatus (1) (X) and the blade (Y) is woven together in a twisted state, each of the string (X) and the blade (Y) to form a predetermined interval and the visible portion is formed by the barbed wire (W), the wire mesh 200 is The bar (X) and the blade (Y) is twisted with each other in a twisted state like a barbed wire in the manufacturing apparatus (1) shows that it is made of a checkerboard form.

Figure 14 is a perspective view showing the main portion extract according to another embodiment according to the present invention, the reinforcing bar is formed by twisting (twisting) the reinforcing steel bar is formed with a band-like projection 301 at equal intervals on the outer surface using the manufacturing apparatus (1) It shows that the net 300 is manufactured.

At this time, the reinforcing bar 300 has a locking jaw function to each other by the protrusion 301 formed on the outer surface.

Referring to the use state of the present invention as follows.

As shown in FIGS. 1 to 14, the twist part 20 is installed at equal intervals in the center of the main frame 2, and the transfer part 60 is provided in front of the twist part 20 in the fifth electric motor. It is installed so as to move forward and backward along the rack 61 by the M5, twisted in the twisted portion 20 by the pressing plate 66 while the bar (X) formed with a visible portion by the barbed wire (W) and The blade (Y) is installed to be moved forward and step by step in a woven state, the blade (Y) and the seed (X) that is advanced and transferred step by step by the transfer unit 60, that is, the barbed wire 100 is wound It is to be wound around the exterior 75 of 70.

On the other hand, in the barbed wire (W) for the barbed wire fabrication is supplied to the twisted portion 20 is twisted, the barbed wire (W) supplied by the rotation of the twisted portion 20, the rotating body 24 together Twisting occurs, but this is because the rotating shaft 13 connected by the chain (C) is the same as the rotating body 24 (forward / reverse rotation) of the barbed wire (W) supplied to the twist portion 20 Twisting is prevented and the bent or bent portion of the barbed wire W wound in a roll shape by a plurality of orthogonal rollers RR installed by the pedestal 19 is shaped (straightened) so that the twisted portion 20 The twist part 20 is installed to move forward and backward by the guide 5 installed on the main frame 2, and after twisting the blade Y by a predetermined length, the side part is twisted. Automatically to the rear so that the seed line (X) can be supplied from the seed line feeder (30) installed in the Manual transfer (automatic transfer by rack and pinion or manual transfer by hand), and the feed of seedline (X) by the seed feeder (30) is seeded by the twist part (20) installed in the transfer die (35). ) Is twisted by a certain length (length set according to the standard of the barbed wire to be manufactured), the transfer die 35 is advanced as the screw 33 is rotated by the second electric motor (M2) Moved and twisted seed line (X) is advanced and moved between the blade 39 and the blade (Y), that is, the space secured as the twist portion 20 is transported backward by the guide (5) The string (X) is located between the blade (Y), so the string (X) and the blade (Y) will be woven.

At this time, after the barbed wire (W) is supplied to the twisted portion 20 in the process of supplying the barbed wire (W), the barbed wire (W) is excessively supplied or released due to the continuous rotation (rotation according to the inertia) In order to prevent them from being entangled with each other, friction (load) is applied to the support shaft 14 which is rotated due to the supply of the barbed wire (W), thereby preventing idling due to inertia, and the rack with the string X (39) is supplied between the blade (Y) is the twisted string (X) tip is interlocked together because the state is engaged by the forceps 40 coupled to the rack 39, the advance of the seed (X) When the movement is completed, the cutter 32 is driven (lowered) by the first cylinder CY1 installed in the front frame 4 to cut the string X, and the third electric motor M3 is driven to pinion. The rack 39 moved forward and backward by 37 is moved back and moved back to its original position.

In this way, when the feeding of the string X is completed between the blades Y, the twist part 20 moved backward along the guide 5 is returned to its original position (advanced and moved) and the first electric motor As the rack 22 is reciprocally driven by the periodic forward / reverse rotation, the blade Y is twisted again by a predetermined length by the drive gear 23, and the rack 22 is driven forward. In this case, since the drive gear 23 is turned right, the blade Y is twisted in the right direction, and when the rack 22 is driven backward and driven, the blade Y is twisted in the left direction as the drive gear 23 is turned left. .

As above, when the string (X) is located between the blade line (Y), the barbed wire by the barbed wire feeder (50) installed so as to form a ° 45 ° on both sides from the center of the drive gear 23 ( W) is supplied to be located at the intersection of the blade line (Y) and the seed line (X), which is shown in Figure 5, the electric roller (R1) and the driven roller (R2) and a plurality of driven rollers ( R) is installed in the state in which the barbed wire (W) is engaged, so when the electric gear (G1) is rotated by the fourth electric motor (M4) is rotated the electric roller (G1) interlocked and coupled thereto, the barbed wire The W is moved and supplied, and the barbed wire W is cut into a predetermined length by the cutter blade 52 driven by the cam 51 eccentrically coupled to the driven gear G3.

At this time, the blade (Y) takes a fixed state without shaking by the damper (D) installed on both sides.

In this way, when the barbed wire W is supplied to the intersection of the blade line Y and the seed line X, the barbed wire W is twisted by the twist portion 20 and at the same time the barbed wire W is supplied from above. ) Is wound to form a barbed portion, and the supplied barbed wire W is pressed so that it is not flowed by the pressing plate 27 installed so as to be carbonized by the support rod 25 and the spring 26 on the drive gear 23. When the driving gear 23 is rotated, the tip is rotated while being mounted by the visible forming pin 28 bent in an annular shape and wound around the intersection to form a visible part.

As described above, the barbed wire mesh 100 is continuously produced by the stepwise driving of the continuous and repeated twist parts 20 and 20 ', the seed feeder 30, the transfer part 60, and the winding part 70, Each stepwise driving is automatically controlled by an electrical signal of the main control unit (not shown in the drawing). Since the electrical signaling method is a known technique applied to a general automation method, detailed description and drawing notation are omitted.

In this way, the blade (Y) and the string (X) is twisted (twisted), the visible portion by the barbed wire (W) as well as the intersection of the blade (Y) and the string (X) as well as predetermined intervals When the barbed wire mesh 100 formed at a large number is manufactured, and, as described above, when the barbed wire mesh 100 is manufactured, the barbed wire feeder 50 is removed or the barbed wire W is not supplied. As shown in FIG. 10, the wire mesh 200 in a twisted and woven state of the blade line Y and the line X is manufactured, and the wires forming the line Y and the line X are manufactured. When twisted using a reinforcing bar formed with a strip-shaped protrusion 301 on the outer circumferential surface, the reinforcing bar network 300 is manufactured.

As such, when the reinforcing bar network 300 manufactured by the manufacturing apparatus 1 is used as a reinforcing bar for construction, there is no need for a separate fixing operation for preventing flow, so that it is easy to use and the work time and manpower according to the reinforcing bar construction It can be minimized.

In addition, by using the manufacturing apparatus 1 as described above, not only can be made of barbed wire mesh, wire mesh and reinforcing bar mesh, it is also possible to manufacture a wire mesh fence.

As such, by manufacturing the barbed wire mesh and wire mesh and rebar network using the manufacturing apparatus according to the present invention, it is possible to standardize the barbed wire mesh, wire mesh and rebar network, and to mass-produce easily and easily, and the farm and border fence, etc. It can be easily installed in the construction, and can improve the workability by preventing the twisting of the barbed wire supplied for the twisting process, and can improve the durability and rigidity as the blade and the seed string are twisted. Not only is it economical as it shortens the construction and construction deadlines, and minimizes the manpower and time required for the work, and it can be used for reinforcing bars easily and easily and firmly as it is used as reinforcing bars when building buildings. Time and manpower can be minimized, resulting in an efficient and economical effect.

Claims (5)

The rotating shaft 13 is supported and fixed by the fixed die 12, and the rotating shaft 13 is installed to enable forward and reverse rotation with the power unit and the chain C. The rotating shaft 13 has a predetermined length and is wound in a roll shape. W is mounted by the fastener 15 so as to be movable along the support shaft 14, and the support shaft 14 is pivoted on the rotary shaft 13 to be rotated, and the brake pad 16 and the speed adjusting bolt 17 are rotated. Supply unit 10 is installed so that the rotational motion is restrained (stop) by the brake lining 18 is provided, The drive gear 23 meshed with the rack 22 reciprocally driven in the longitudinal direction by the first electric motor M1 rotated forward and reverse at a predetermined cycle is rotated and coupled to the front surface of the rotating body 24, The pressing plate 27 is coalesced by the support rod 25 and the spring 26 on one side thereof, and the visible forming pin 28 having the tip portion bent in a ring shape on both sides thereof is coupled to the rotating body 24 and the driving gear 23. The twist portion 20 is in communication with the through hole 29 having a predetermined radius of curvature; In the center of the front frame 4, a '32'-shaped cutter 32 driven up and down by the first cylinder CY1 is installed and rotated by a second electric motor M2. The transfer die 35 having the twisted portion 20 ′ is driven forward and backward along the guide rail 34 and is connected to the third electric motor M3 installed at one end of the transfer die 35. The '39'-shaped rack 39, which is engaged with the pinion 37 rotated by and driven by the second cylinder CY2, is installed in the transverse direction, and the rack 39 The seed line feeder 30 is installed at the front end of the forceps 40 driven by the operating rod 38; The electric gear G1, the driven gear G2, and the driven gear G3, which are rotated by the fourth electric motor M4, are engaged and rotated, and the electric roller R1 is coupled to the electric gear G1. The driven gear G3 is installed so that the eccentric cam 51 and the cutting blade 52 are interlocked so that the center of the drive gear 23 of the twist part 20 can be supplied, shaped and cut. A barbed wire feeder 50 installed at both sides starting at ∠45 °; The rack 61 is installed at a predetermined length along the main frame 2 and is provided at both ends of the rotating shaft 64 connected to the electric gear 62 and the driven gear 63 rotated by the fifth electric motor M5. The barbed wire manufacturing apparatus, characterized in that the transfer unit 60 is coupled to drive the barbed wire crimping piece (66) forward and backward by the pinion (65) to be engaged with the rack (61). The method of claim 1, The supply unit 10 is a barbed wire manufacturing apparatus, characterized in that a plurality of orthodontic rollers (RR) for straightening the bent or bent portion of the barbed wire (W) to be supplied is installed by the pedestal (19). The method of claim 1, The supply unit 10 is connected to the chain (C) is mounted on the rotating shaft 13 installed on the fixed die 12 to the forward and reverse rotation, the visible wire (W) wound in the form of a roll by the first drive wheel (WH1) is mounted At the rear of the rotary shaft 13, the barbed wire W wound in the shape of a roll by the second driving wheel WH2 is mounted at an upper end thereof, and the brake pad 16 and the speed adjusting bolt 17 are disposed below. ) Is a barbed wire manufacturing apparatus, characterized in that the driven shaft 11 is coupled to the brake lining 18 is provided. Twist (20), seed line feeder (30), transfer unit 60, the winding unit 70 is provided with a twisting line (X) and the blade (Y) are each woven in a twisted state, Each barbed wire (X) and the blade (Y) barbed wire, characterized in that the barbed portion formed at a predetermined interval. The twisted line 20, the seed line feeder 30, the transfer unit 60, the winding unit 70 is provided with a twisting line (X) and the blade line (Y) are each woven in a twisted state Wire mesh characterized in that.