KR102507638B1 - Net for preventing falling rocks - Google Patents

Abstract

The present invention relates to a net for preventing a falling rock, which is installed to prevent a falling rock and a collapse of bedrock on a slope of a road. The net for preventing a falling rock includes: a rectangular band-shaped wire ring; a mesh installed for first and second wires to cross each other on the inner side of the wire ring, wherein the first and second wires are adjacent to face a diagonal direction; and multiple fixing members fixing the first and second wires by being installed at an intersection point at which the first and second wires cross each other. A part of the multiple fixing members includes: a support anchor inserted and installed in the slope; a ground pressure unit fixed and connected to the support anchor; a rotation unit rotatably connected to the support anchor and installed to cross the ground pressure unit at right angles, wherein the adjacent first and second wires are connected to both ends of the rotation unit; and an elastic spring installed to connect the ground pressure unit and the rotation unit in the diagonal direction and elastically supporting the rotation unit against a tensile force.

Description

Fall prevention net {NET FOR PREVENTING FALLING ROCKS}

The present invention relates to a fall prevention net, and more particularly, to a fall fall prevention net attached to a slope such as a cut surface or a slope of a road to prevent loss of life and loss of property by preventing the occurrence, loss and collapse of rocks. will be.

In general, when constructing roads that include mountainous areas, artificially formed incisions and inclined surfaces such as slopes are formed due to cuts. Not only can rock fall occur because of separation, but there is a concern about rock collapse in which rocks collapse on a large scale, so a rock fall prevention net is installed.

The construction of such a fall prevention net is divided into reinforcement method and protection method according to its function. Reinforcement method includes cutting method, surface arrangement, anchor, rock bolt, concrete buttress wall, bonecrete block method, shotcrete, drainage method, etc., and protection Construction methods include anti-fallfall netting, anti-fallfall fence, anti-fallfall retaining wall, rock tunnel, and vegetation construction method.

As an example of a fall prevention net, cover a protective net on an inclined surface such as a cut surface or a slope, and install longitudinal and transverse wires on it at regular intervals, fixing their intersection with a fixing member or anchoring to the ground with anchor bolts, etc. A wire safety net is used to prevent falling rocks from falling on a slope such as a cut surface or a cut surface.

These fall prevention nets are largely divided into pocket-type and curtain-type, and the pocket-type safety net adheres to the wall of the bedrock with a PVC coating net, crosses the wires in the longitudinal and lateral directions at intervals of several meters, and then selects each intersection point to fix it. To increase the resistance of the wire at certain positions, anchor bolts are fixed to the bedrock to increase the bearing capacity of the PVC coated net and wire. It reinforces anchor bolts and is mainly used in cuts made of soft rock or weathered rock with severe cracks and fast weathering.

As a prior art related to this, Patent Document 1 includes a rope member coupled in a cross direction and a wire connected to the rope member, and a fall prevention structure covering a slope by a net assembly fixed to the slope by a fixing means, the fixing means An anti-fall structure is disclosed in which one or more anchors are inserted into the slope to stabilize the surface layer of the slope, and the anchor and net assembly have sufficient strength to restrain movement of identified rock masses on the slope.

However, in this prior art, when the surface of the cut surface is rough and uneven due to blasting or the like, or the curve of the cut surface is large and the rock mass is installed to cover a protruding slope, the safety net is closely installed to fit the curve of the slope. If not, there is a problem that the bearing capacity of the wire is weakened, the suppression force of falling rocks is lowered, and various accidents can occur because the rock mass is easily separated. In addition, there is a problem that the connection and installation of the wire is complicated, does not provide a continuous tension force, and does not efficiently absorb the pressure according to the ground behavior, so that the anti-rockfall net can be easily torn or broken and damaged.

Republic of Korea Patent Publication No. 10-2010-0138967 (published on December 31, 2010)

The present invention has been made to solve all of the above-mentioned problems, and provides tension to the wire using the elastic force and the control unit, and efficiently absorbs the impact energy according to the ground behavior to weaken the impact transmitted to the wire and reduce the impact of the slope. It suppresses collapse, prevents disconnection and deformation of wires, and adjusts the wire so that it is installed closely to the curve of the slope, strengthening the bearing capacity, increasing the separation of rock pieces and preventing the occurrence of falling rocks, and in case of falling rocks, Its purpose is to provide a rockfall prevention network that can prevent traffic obstacles, damage to road structures, and damage to road users and property loss by safely guiding them down without bouncing.

In order to solve the above problems, the present invention is a rockfall prevention net installed to prevent rockfall and rock collapse on a slope of a road, comprising: a square band-shaped wiring; a wire network installed so that first and second wires adjacent to each other cross each other while facing in an oblique direction inside the wiring; and a plurality of fixing members installed at the intersection where the first and second wires cross each other to fix the first and second wires, wherein some of the plurality of fixing members are fixed to the support anchor inserted into the inclined surface and installed to the support anchor. Acupressure unit coupled to acupressure on the ground, rotatably coupled to a support anchor, installed orthogonally to the acupressure unit, and a rotation unit to which the first and second wires adjacent to both ends are connected, and an oblique connection between the acupressure unit and the rotation unit It is installed to provide a rockfall prevention net including an elastic spring for elastically supporting the rotating part against the tensile force.

In addition, the present invention is a rockfall prevention net installed to prevent rockfall and rock collapse on a slope of a road, comprising: a square band-shaped wiring; a wire network installed so that first and second wires adjacent to each other cross each other while facing in an oblique direction inside the wiring; A plurality of fixing members installed at the intersection where the first and second wires intersect each other to fix the first and second wires and an adjustment unit connected to and installed in the middle of the wiring to tension or compress the fall prevention net, wherein the adjustment unit A pair of moving rods with a thread formed on the outer circumferential surface of the control rod, which linearly moves closer or farther away from each other so that one end of the control rod moves in and out of the control groove by rotational manipulation, and a control groove connected between the pair of moving rods and formed with threads on the inner circumferential surface. Equipped with a control rod that allows a pair of moving rods to move linearly by rotation operation, the other end of the moving rod having a bolt head on one side is inserted into an internal support groove, a compression spring is interposed on the bolt head side, and a wire is connected to the other side. And it is screwed to the moving rod to provide a rockfall prevention net comprising a fixing nut for fixing the support rod.

According to the present invention, tension is applied to the wire using the elastic force and the control unit, and impact energy according to the ground behavior is efficiently absorbed to weaken the impact transmitted to the wire, suppress the collapse of the slope, and prevent disconnection and deformation of the wire. and the wire can be adjusted so that it is installed closely to the curve of the slope, strengthening the bearing capacity, increasing the separation of rock fragments and preventing the occurrence of falling rocks, and in the case of falling rocks, stones are safely guided down without bouncing, preventing traffic obstacles, It has the effect of preventing damage to road structures, human life and property loss of road users.

1A and 1B are views showing a fall prevention network according to an embodiment of the present invention.
2a and 2b are views illustrating a fixing member according to an embodiment of the present invention.
Figure 3a is a view showing a tension unit according to the second embodiment of the present invention, Figure 3b is a view showing the fixing bolt, fixing block, and support piece of the present invention, Figure 3c is a view showing the first embodiment of the present invention Figure 3d is an AA' cross-sectional view of Figure 3c, Figure 3e is a view showing some configurations of the extension unit of the second embodiment of the present invention, Figure 3f is a connection to the support piece It is a diagram showing the action of the ring.
4a and 4b are diagrams illustrating a control unit according to an embodiment of the present invention.
5 is a view showing a part of a construction example of a rockfall netting according to an embodiment of the present invention.
Figure 6 is a state diagram showing the state of use of the fall prevention net of the present invention constructed on a slope.

Hereinafter, with reference to the drawings, it will be described in detail with reference to the embodiment with respect to the specific contents for implementing the fall prevention net (1) according to the present invention.

The falloff prevention net (1) according to the present invention is attached to an inclined surface such as a cut surface or a slope of a road and is installed to prevent the occurrence, loss, and rock collapse of falling rocks to prevent human casualties and property loss. It can be constructed with a PVC network that is denser than the network, including all or part of the wiring 100, the wire network 200, the fixing member 300, the tension unit 400, and the control unit 500. It can be done.

Referring to FIGS. 1A and 1B, the wiring 100 is formed in a substantially square band shape, and when an adjustment unit 500 to be described later is connected, extension heads 110 are formed at both ends, respectively, to support rods 530. It is inserted and connected to the support groove 531 of the.

At this time, the wiring 100 may be formed to have a larger diameter than the wire network 200. For example, the wiring 100 has a diameter of 15 mm, and the wire network 200 has a diameter of 10 mm. can have

The wire network 200 is connected to the wiring 100 directly or through a plurality of connecting members 240, and is directed to the inside of the wiring 100 in an oblique direction, and the first wire 210 and the second wire 210 are adjacent to each other. The two wires 220 are installed to cross each other, and are installed to form a plurality of lozenges by forming a plurality of intersections.

Referring to Figures 2a and 2b, the fixing member 300 is installed at each intersection where the first wire 210 and the second wire 220 that are adjacent to each other cross each other, so that the first wire 210 and the second wire (220) is fixed. At this time, the fixing member 300 having anchors may be installed at all intersection points, or the fixing member 300 having anchors may be installed only at some intersection points. For example, curtain-type fixing members without anchors may be installed at intersections where it is difficult to install anchors depending on the nature, shape, strength, etc. of a cut surface or rock mass, and a curtain-type fixing member with anchors may be installed at intersections where anchors can be installed.

Among them, the fixing member 300 having an anchor includes a support anchor 310 inserted into the inclined surface, and the acupressure part 320 penetrates the support anchor 310 and is acupressure to the ground while being fixedly coupled. (320) The rotation part 330 is connected to the support anchor 310 on the upper side so as to be orthogonal to the acupressure part 320, and is rotatably installed with respect to the support anchor 310, and the first wire 210 at both ends, respectively And the second wire 220 is connected. An elastic cylindrical elastic sleeve 315 having elasticity is interposed between the support anchor 310 and the rotary part 330 so that the rotary part 330 rotates smoothly and cushions impact caused by ground motion and rockfall.

An elastic spring 340 is connected in an oblique direction between the acupressure unit 320 and the rotation unit 330 so that the first and second wires 210 and 220 maintain continuous tension by the elastic force and buffer external impact. At this time, the elastic spring 340 may be installed between the pressure portion 320 and the upper rotation piece 331, or may be installed between the pressure portion 320 and the lower rotation piece 332.

Of course, in the prior art, there was a fall prevention net that maintained wire tension by applying a spring, but when the spring is elastically supported only in one specific direction and receives force in other or multiple directions, there is sufficient resistance against pressure or rockfall according to ground behavior. However, in the fixing member 300 of the present invention, the rotating part 330 has four diagonal lines with respect to the fixing part 320. It is elastically supported by the elastic spring 340, and when the rotating part 330 rotates, the four elastic springs 340 simultaneously compress and extend, complementing each other, so that they can exert sufficient bearing capacity in the event of pressure or rockfall due to ground behavior, By buffering the impact on the wire, disconnection and deformation can be prevented.

At this time, the rotating part 330 is provided with an upper rotating piece 331 and a lower rotating piece 332 in the upper and lower portions, respectively, and the upper rotating piece 331 and the lower rotating piece 332 are each provided with a center hole ( (not shown) is formed so that the support anchor 310 and the elastic sleeve 315 are through-connected, and a ring-shaped bulkhead 336 is formed in the vertical direction along the outer periphery of the central hole to insert the elastic support ring 335 into the insertion groove. The first and second wires 210 and 220 inserted into (335a) are blocked and smooth rotation is possible while in contact with the elastic sleeve 315. In addition, the upper rotating piece 331 and the lower rotating piece 332 are fixedly connected to the rotating shaft 333 in the vertical direction on both sides, and the cylindrical sleeve 334 is fixedly coupled to the outer circumferential surface of the rotating shaft 333 to form an elastic support ring ( 335 helps to rotate, and an elastic support ring 335 is rotatably coupled to the outer circumferential surface of the sleeve 334, and the elastic support ring 335 has elasticity and has an insertion groove having a semicircular cross section along the outer circumference ( 335a) is formed and the first wire 210 or the second wire 220 is inserted and connected.

Therefore, when pressure or rockfall occurs due to ground motion, the first and second wires 210 and 220 are primarily elastically supported by the elastic support ring 335 and the impact is buffered, and according to the movement of the first and second wires 210 and 220 As the elastic support ring 335 rotates, it is possible to prevent disconnection or deformation of the wire as well as to absorb shock.

In addition, in the fixing member 300 of the present invention, since the rotating part 330 is elastically supported by four elastic springs 340 in a diagonal direction with respect to the fixing part 320, the fixing member 300 is wire mesh 200 The first wire 210 and the second wire 220 are also rotated secondarily according to the direction of the force applied to the wire net 200, while the rotating part 330 is rotated in one or the other direction. When the impact energy is absorbed by the elastic spring 340 and the external force disappears, it returns to its original position, thereby preventing disconnection or deformation of the first and second wires 210 and 220 and reducing the load concentrated on the support anchor 310. It is possible to secure structural stability by dispersing.

In addition, a cylindrical elastic sleeve 315 having elasticity is interposed between the support anchor 310 and the rotating part 330 to increase rotational support, and the acupressure part 320 is supported on the ground below the elastic sleeve 315 By being installed while being installed, smooth rotation of the rotating part 330 is possible, and the fixing member 300 and the wire net 200 are elastically supported by the elastic sleeve 315. As a result, even when the fall prevention net 1 floats up on the slope due to rocks or rocks, the elastic sleeve 315 supports the acupressure unit 320 toward the slope to prevent the wire net 200 from being separated from the support anchor 310. prevent.

Referring to FIGS. 3A to 3F , the tensile unit 400 pulls the diamond-shaped central wire 230 formed at the center of the wire net 200 inward to stretch the wire net and buffer the impact.

To this end, the tensile unit 400 is provided with a fixing bolt 410 inserted into the inclined surface through the wire net 200, and a fixing block 420 in the shape of a lozenge square plate on top of the fixing bolt 410 This is fastened and closely fixed to the inclined surface, and "∩"-shaped support pieces 430 protrude in an oblique direction on each of the four surfaces of the fixing block, and support springs 431 are interposed on both sides of the support pieces 430.

In the first embodiment, a lower bar 440, an upper bar 450, and a tension spring 460 are installed between the support piece 430 and the rhombic central wire 230.

The lower bar 440 has one end formed with a lower ring 443, the lower ring 443 is connected to the connecting ring 444, and the connecting ring 444 is between the support springs 431 on both sides of the support piece 430. It is movably connected from, the other end has a lower stopper 441 protruding, and a rail groove 442 is formed along the longitudinal direction at the top.

The upper bar 450 is installed in contact with the upper part of the lower bar 440, but one end is formed with an upper stopper 451 protruding and the other end is formed with an upper ring 453, and the upper ring 453 is a connecting ring 454 ) It is connected to the central wire 230 and the rail 452 protruding downward is movably fastened to the rail groove 442 so that the upper bar 450 and the lower bar 440 are movable without being separated. .

The tension spring 460 wraps the upper bar 450 and the lower bar 440 together and is installed between the upper stopper 451 and the lower stopper 441 to apply tension between the support piece 430 and the wire. The bearing capacity of the wire net 200 is improved.

The upper bar 450 and the lower bar 440 move in opposite directions, moving closer or farther away from each other in a state surrounded by the tension spring 460, thereby imparting a tensile force or buffering an impact.

Therefore, the tensile unit 400 of the first embodiment pulls each side of the central wire 230 forming a rhombic shape at the center of the wire net 200 inward and tensions it to give a tensile force so that the wire net 200 bends on the inclined surface. It can be adjusted so that it is installed in close contact with each other, so that the bearing capacity is strengthened, and the effect of preventing separation of rock pieces and rockfall is increased. , Along with this, while the connecting ring 444 is moved from the middle of the support piece 430 to one side or the other side, it is elastically supported by the support springs 431 on both sides to absorb shock secondarily.

In addition, the wire net 200 is formed by wrapping the covering material 250 around the center wire 230 that is connected to the tensile part 400 and pulled inward, and the center wire 230 that is pulled while being bent inward is formed. The stoppering 260 is attached to both sides of the covering material 250 so that the covering material 250 adheres to the central wire 230, and when pressure or rockfall occurs due to ground behavior, the connection ring 454 connects to the central wire 230 Disconnection or deformation of the wire can be prevented by limiting the range of left and right movement on the covering material 250 of the wire.

In the second embodiment, a tension bolt 470, a tension piece 480, and a fixing nut 490 are installed between the support piece 430 and the diamond-shaped central wire 230.

The tension bolt 470 is inserted into the inner groove 481 of the tension piece 480 at one end where the bolt head 471 is formed on one side, and is installed between the bolt head 471 and the closed portion of the tension piece 480. A tension spring 472 is interposed between the located tension bolt 470, and a fastening ring 473 is formed on the other side. ) is movably connected between them.

The tension piece 480 has a “⊃” shape, and the tension bolt 470 penetrates the closed portion, so that the bolt head 471 and the tension spring 472 are disposed in the inner groove 481, and the side holes ( 482) is formed, the central wire 230 is connected and pulled toward the center, and an interrupted piece 483 closing the opening side is connected.

The fixing nut 490 is screwed to the tension bolt 470 to fix the tension piece 480.

Therefore, the tensile unit 400 of the second embodiment pulls each side of the central wire 230 forming a rhombic shape at the center of the wire net 200 inward and tensions it to give a tensile force so that the wire net 200 bends on the inclined surface. It can be adjusted so that it is installed in close contact with each other, so that the bearing capacity is strengthened, the separation of rock pieces and the prevention effect of falling rocks are increased, and the pressure according to the ground behavior or the elastic force of the tension spring 472 absorbs the impact energy by the elastic force of the falling rocks. As the connecting ring 474 is moved from the middle of the support piece 430 to one side or the other side, it is elastically supported by the support springs 431 on both sides to absorb shock secondarily.

Referring to FIGS. 4A and 4B , the control unit 500 is connected to and installed in the middle of the wiring 100 to tension or compress the rockfall prevention net 1 .

The control unit 500 has a screw thread formed on the outer circumferential surface of a pair of moving rods 510 that linearly move so that one end thereof moves in and out of a control groove (not shown) inside the control rod 520 by rotation of the control rod 520. ), a bolt head 511 is formed at the other end of the moving rod 510, a control rod 520 is connected and installed between a pair of moving rods 510, and a screw thread is formed on the inner circumferential surface of the control rod 520. This formed control groove (not shown) is provided, and a pair of moving rods 510 are connected to the wiring 100 and the wiring 100 while linearly moving to or away from each other by rotation of the control rod 520. Tensile force is provided to the wire network 200.

In addition, the support rod 530 is installed by inserting the other end of the moving rod 510 having a bolt head 511 on one side into the support groove 531 and installing a compression spring 532 on the moving rod 510 on the side of the bolt head 511. ) is interposed to increase the tensile force to improve the support for the wire, and fix the support bar 530 by screwing the fixing nut 540 to the moving bar 510.

The wire of the wiring 100 is connected to the other side of the support bar 530. For example, in one embodiment, a ring (not shown) is formed on the other side of the support bar and a ring (not shown) is formed at the end of the wiring 100 so that both rings can be connected.

In another embodiment, the end of the wiring 100 is inserted into the support groove 531 of the support bar 530 and connected, and an extension head 110 having an expanded diameter is formed at the end of the wiring 100, , The wire spring 550 is interposed on the side of the extension head 110, whereby the compression spring 532 and the wire spring 550 on both sides of the support rod 530 in addition to the application of primary tension by the control rod 520 Secondary tensile force is given, and the bearing capacity of the wire is greatly improved.

In addition, the support bar 530 has threads formed on the outer circumferential surface and a connecting ring 533 having a shape such as a circular ring or a square ring is fastened to the outer circumferential surface. Two connection holes (not shown) are formed. At this time, fixing nuts (not shown) are fastened to both sides of the connecting ring to increase fixing force. This is because the connection member 240 connected to the wiring 100 cannot be directly applied to the control unit 500 as the control unit 500 is fastened to the wiring 100, so the outer circumferential surfaces of the support rods 530 on both sides The connection ring 533 is screwed into the connection ring 533, but the position connected to the wire network 200 can be adjusted by rotating the connection ring 533, and one of a plurality of connection holes formed in the connection ring is selected to connect the wire network 200. By passing the wire through and being fixed to the control unit 500, it can be connected to the wire net 200 and the right position, and thus, the tensile force on the wire net 200 can be maximized.

As a result, the rockfall prevention net according to the present invention gives tension to the wire using the elastic force and the control unit, efficiently absorbs the impact energy according to the ground behavior, weakens the impact transmitted to the wire, suppresses the collapse of the slope, and Disconnection and deformation are prevented, and the wire can be adjusted so that it is installed closely to the curve of the slope, so the bearing capacity is strengthened, the separation of rock pieces and the prevention of rockfall are increased, and in the event of a rockfall, stones are not bounced and safely guided down It can prevent traffic obstruction, damage to road structures, and loss of life and property of road users.

The above embodiment in the present invention is an example, and the present invention is not limited thereto. Anything having substantially the same configuration as the technical concept described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

1. Falling Rocks Region 100. Wiring
110. Extended head 200. Wire network
210. First wire 220. Second wire
230. Central wire 240. Connection member
250. Covering material 260. Stoppering
300. Fixing member 310. Support anchor
315. Elastic sleeve 320. Acupressure unit
330. Rotating part 331. Upper rotating piece
332. Lower rotating piece 333. Rotating shaft
334. Sleeve 335. Elastic support ring
335a. Insertion groove 336. Bulkhead
340. Elastic spring 400. Tensile part
410. Fixed bolt 420. Fixed block
430. Support piece 431. Support spring
440. Lower bar 441. Lower stopper
442. Rail groove 443. Lower ring
444. Link 450. Top bar
451. Upper stopper 452. Rail
453. Upper ring 454. Link
460. Tension spring 470. Tension bolt
471. Bolt head 472. Tension spring
473. Fastener 474. Link
480. Tensile piece 481. Inner groove
482. Side Hall 483. Intermittent Pieces
490. Fixing nut 500. Control unit
510. Moving rod 511. Bolt head
520. Control rod 530. Support rod
531. Support groove 532. Compression spring
533. Connecting ring 540. Fixing nut
550. Wire spring P. PVC net

Claims (9)

In the fall prevention net installed to prevent rockfall and rock collapse on the slope of the road,
square strip-shaped wiring; a wire network installed so that first and second wires adjacent to each other cross each other while facing in an oblique direction inside the wiring; It includes a plurality of fixing members installed at the intersection where the first and second wires intersect each other to fix the first and second wires, and an adjustment unit connected to and installed in the middle of the wiring to tension or compress the fall prevention net,
The control unit has a screw thread formed on the outer circumferential surface of a pair of moving rods that linearly move closer or farther away from each other so that one end portion moves in and out of the control groove by rotating the control rod, and is connected between the pair of moving rods and has a screw thread formed on the inner circumferential surface. A control rod having a control groove and allowing a pair of moving rods to move linearly by rotation operation. The other end of the moving rod having a bolt head on one side is inserted into an internal support groove, a compression spring is interposed on the bolt head side, and a wire on the other side. Including a fixing nut that is screwed to the support rod and the moving rod to which is connected to fix the support rod,
The support bar has a screw thread formed on an outer circumferential surface and a ring-shaped connection ring is screwed onto the outer circumferential surface, and the connection ring has a screw thread formed on an inner circumferential surface and a plurality of connection holes formed along the circumference to connect the wire of the wire network. Rockfall prevention net made with.
According to claim 1,
The fall prevention net, characterized in that the wire ring is inserted into the support groove of the support rod and installed, an extension head having an expanded diameter is formed at an end of the wiring ring, and a wire spring is interposed on the extension head side.
According to claim 1,
The wire network further includes a tensile unit for providing a tensile force and buffering an impact by pulling a central wire having a rhombus shape formed in the center,
The tension part is a fixing bolt that penetrates the wire net and is inserted into the inclined surface, a diamond-shaped fixing block fastened to the top of the fixing bolt and closely fixed to the inclined surface, and a support spring protruding from the four surfaces of the fixing block in an oblique direction and on both sides. The interposed "∩"-shaped support piece, one end is connected through a linkage so that it can move between the support springs on both sides of the support piece, and the other end has a lower bar with a protruding lower stopper and a rail groove formed along the longitudinal direction at the top. , It is installed on the upper part of the lower bar, but one end is formed with an upper stopper protruding, and the other end is connected to the central wire through a connecting ring, and the rail protruding to the lower part is movably fastened to the rail groove, and wraps the upper bar and the lower bar together. Fall prevention net including a tension spring installed between the upper stopper and the lower stopper.
According to claim 3,
The wire net is formed by wrapping a covering material around a central wire portion that is connected to the tensile part and pulled inward, and a stopper ring is bound to both sides of the covering material to limit the movement range of the upper bar.
According to claim 1,
The wire network further includes a tensile unit for providing a tensile force and buffering an impact by pulling a central wire having a rhombus shape formed in the center,
The tension part is a fixing bolt that penetrates the wire net and is inserted into the inclined surface, a diamond-shaped fixing block fastened to the top of the fixing bolt and closely fixed to the inclined surface, and a support spring protruding from the four surfaces of the fixing block in an oblique direction and on both sides. This interposed “∩”-shaped support piece, one end of which has a bolt head on one side is inserted and installed into an inner groove, a tension spring is interposed on the bolt head side, and a fastening ring is formed on the other side, so that the support springs on both sides of the support piece are connected through the connecting ring. A tension bolt movably connected between them, has a "⊃" shape, and the tension bolt penetrates the closed part side, the bolt head and the tension spring are placed in the inner groove, and side holes are formed on both sides to connect the central wire. An anti-rockfall net comprising a tension piece to which a closing intermittent piece is connected and a fixing nut screwed to a tension bolt to fix the tension piece.
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