JP4366274B2 - Cross clip and its fastening method - Google Patents

Description

  The present invention relates to a cross clip and a fastening method thereof, and more specifically, in order to prevent the collapse of debris on an inclined land such as a mountainous portion, the crossing portion of wire ropes stretched vertically and horizontally is secured, and the rope at that portion The present invention relates to a cross clip that can prevent loosening and slipping of the belt as much as possible and a fastening method thereof.

  On roads that extend through the mountains, there is a risk of being blocked by falling rocks from slopes on the roadside, or being damaged by stones from which vehicles were dropped. For this reason, an appropriate construction method is applied to the sloped land in order to keep buried gravel stones and rocks floating on the ground. When the earth and stone is relatively small, a method is adopted in which a wire mesh is laid on the slope and the wire mesh is held down by a number of lattices formed by crossed ropes. In the rock area where the rocks are relatively large or where there is a risk of collapsing, stretch the ropes so that they cross each other, hold the slope directly, especially for large floating stones, individually roped as necessary, A construction method to prevent the peeling is adopted.

  In any case, the rope to be used is made of a twisted wire rope, that is, a steel having a high tensile strength because it needs to withstand a very large load. In order to fix the crossing portion of the wire rope, a clamp fitting made up of two upper and lower parts of a receiving tool and a pressing tool is used. On the opposite side of the metal fitting, a rope groove that half-sinks one or the other of the intersecting wire ropes is formed, and the wire rope is fitted into the groove so as to intersect between the metal fittings, and the bolt that secures the receiving tool and the holding tool Etc. Hold both wire ropes so that they are pinched.

  Such a metal fitting is called a cross clip because it holds the wire rope at the crossing portion so that it does not move. However, it is actually not easy to exert a large clipping force. The rope is steel, and the cross clip that holds the rope is cast steel, etc., but it stays in line contact as described later even though it fits into the rope groove, and it is difficult to generate a large frictional force. However, because the strength is the same, they are crushed and damaged together.

  The above-mentioned cross clip is indispensable in rockfall prevention facilities that hold floating stones, etc., but it goes without saying that the prevention of rockfall prevention should be improved by increasing the wire rope displacement prevention force and suppressing lattice deformation. Yes. Since there is a limit to the magnitude of the frictional force caused by the contact of metal of the same quality or close to it, recently, attempts have been made to positively apply deformation to the rope to prevent slippage. One of them is not only to make contact at the point where the wire ropes intersect, but also to use the force that interacts with the ropes to bend the other rope with one rope, and as a reaction, the other rope Bending clips have been proposed.

  In order to increase the frictional force by deforming each other at the crossing portion of the wire rope, the rope groove formed on the receiving tool and the pressing tool may be partially deepened at the crossing portion. Since there is no contact between the wire ropes other than at the intersection, it is natural that no bending will be given no matter how much force is applied to the wire rope fitted straight into the groove of the same depth, This is because if the groove is deepened only at the intersecting portion of the rope, the wire rope must be bent so as to adapt to the recess.

  That is, one rope is sandwiched and restrained between the concave surface of the intersection of the rope groove into which it is fitted and the intersection contact portion of the other rope. Similarly, the other rope is fitted in itself. It is sandwiched and restrained between the concave surface of the intersection of the round rope groove and the intersection contact portion of one rope. As a result, the wire rope is deformed so as to be entangled with each other at the crossing portion, so that the displacement at the portion is less likely to occur, and therefore the pulling strength is expected to be doubled.

  Although there are no recent prior art documents that propose a clip having such a structure, there are some problems in that the wire ropes strongly hold each other at the intersection. One is that the crossed wire ropes do not have superior or inferior hardness, so that the ropes do not deform unless a large pressure is applied to the clips. That is, instead of pressing one on the other hand, the metal fittings crush both at the same time.

  As will be described later, for example, it is two bolts that secure the holding metal fitting and the receiving metal fitting, and if it is attempted to bend at the crossing portion of the wire rope by the tightening force of this bolt, You can't completely immerse yourself in the rope groove. Therefore, as a result of the rope groove being made shallower than the wire rope diameter, a fastening configuration is adopted in which a gap remains between the metal fittings even in the maximum tightened state.

  In order to generate the desired pulling strength while leaving the gap, it is necessary to apply a torque of a predetermined size to each bolt based on data obtained by a field test or the like. This not only imposes a heavy burden on the bolt tightening operation with the torque wrench while taking the reaction force with its own strength, to the worker who is on the mountainous terrain and the scaffold is unstable and entrusts himself to the lifeline, The torque management at that time is also required to be accurate, and the harshness of the labor is far beyond imagination.

  The next problem is that the ropes of the same hardness are damaged in a state of mutual damage in order to deform the wire rope. Even if the rope does not break, the proof strength of the rope is significantly reduced locally. If there are scratches or cracks, it is inevitable that the wound will expand as long as tension is applied to the rope. Even if the nominal diameter of the wire rope is 12 millimeters, the cross section of the portion secured by the cross clip is no longer the nominal equivalent. In this case, it is necessary to have a wire rope having a large diameter and to generate a proof strength equivalent to a diameter of 12 millimeters at the crossing portion, and the quality is excessive at other than the crossing portion. If the rope becomes thicker, the cross clip must be enlarged, which increases the weight and reduces the work efficiency.

  A further consideration is that stranded wire is used as the wire rope. Since many thin steel wires are twisted, thin lines are exposed on the surface of the rope. Although the wire rope is composed of a number of wires, the force exerted between the wire ropes is concentrated on only a few steel wires located on the surface.

  Since the wire rope is not a perfect circle in cross section, for example, three stranded wires made of several thin steel wires are collected and twisted to have a larger diameter. Changes sequentially between pitches. Accordingly, since the thin wire on the surface of the other wire rope comes into contact with one of the wires, the shearing force acting on the ropes increases, and the hatching becomes severe. Further, in the rope groove, since three to four lines having a thin surface are only in line contact with the groove surface, the generated frictional force is not increased, and on the other hand, the rope is slippery.

  The thinning and thinning of the rope creates a gap between the other rope and the concave surface, weakens the engagement state at that portion, and loosens the entanglement between the bent ropes. Even if the bolt securing the cross clip is locked, it is not in principle tightened again after being secured once, so that the securing force is gradually reduced by the wire rope itself. This leaves room for the wire rope to slip or slip, and the intended purpose of the cross clip cannot be achieved. As a result, it will be necessary to leave a rockfall prevention facility that is unaware of the weakening of the wire rope, or it will be necessary to retighten the clips that are used in several hundreds to thousands. This may cause a decrease in reliability and a significant increase in labor burden in maintenance work.

  Incidentally, in Japanese Patent Application Laid-Open No. 2003-278164, a cross-shaped rope groove for partially burying both intersecting wire ropes is formed on the opposite side of the metal fitting, and the portion bent by the force exerted on each other at the intersecting portion A clip is disclosed which only accommodates only in a local recess. In this case, the rope groove is intentionally formed shallowly, and the pinching of the wire rope is enhanced so that a gap is generated between the metal fittings as in the previous example.

In this example, since all the ropes in the portion between the metal fittings are crushed in the rope groove, mutual wear at the wire rope crossing site is promoted. In other words, when bending at the intersection part, the rope outside the intersection part will be pulled slightly, but the upper and lower metal fitting grooves hold down the intersection part with a strong force to form a bend at the intersection part. Behavior is suppressed. This forces only the crossing points to stretch and speeds up the hatching of the ropes at the overlap. The simplest way to solve this is to increase the size of the clip. However, the weight of the clip is inevitably increased, and the fastening operation with several heavy metal fittings in a harsh environment greatly reduces the work efficiency. Since a gap is left between the metal fittings, there is no room for eliminating the accurate torque management work that increases the burden on the worker, as in the example described above.
JP 2003-278164 A

  The present invention has been made in view of the above-described problems. The purpose of the present invention is to fix a wire rope with a bolt so that the wire rope can be clamped without slipping or slipping when it is tied. It is possible to reduce the fastening torque required to bend and wire the wire rope as much as possible, and to substantially eliminate the management of bolt tightening torque that requires accuracy in order to exert the desired pulling strength. Reduces the labor burden of the operator who performs the tying operation, avoids hatching without damaging the wire rope, and cuts or crushes even if the wire rope is formed from a thin stranded wire The underlying wire rope does not lose its engagement state over time, and there is no need for retightening after construction, maintaining high stability and reliability as a clip. Excessive diameter adoption of the rope is not necessary in anticipation of posteriori strength reduction at the site, to provide a cross-clips and fastening method is to be realized that the enlargement of the clip is avoided.

  The present invention is applied to a cross clip in which a crossing portion of a wire rope is positioned between opposing pressing members, and the pressing member is screwed at a portion avoiding the crossing position so that the wire rope is secured. The The feature is that, referring to FIG. 1, a single rope groove in which one or the other of the crossing wire ropes 4, 5 is completely immersed in the mating surfaces of the pressing members 2, 3. 9, 10 are formed. Pressing protrusions 11 and 12 that allow the entire rope grooves 9 and 10 formed in the pinching members 2 and 3 to enter themselves are provided at portions other than the wire rope crossing position 13 on the mating surface of the other pinching members. It is done. A space for securing the bent portions 4a and 5a which is secured to generate the partial bent portions 4a and 5a in the straight wire ropes 4 and 5 in the rope groove by the pressing protrusions 11 and 12 by increasing the screw fastening force. 14 and 15 are formed at positions corresponding to the pressing protrusions 11 and 12, respectively. As a result, even if the crossing wire ropes 4 and 5 are secured by the pinching members 2 and 3, the pulling strength of each wire rope is improved without causing the wire ropes to exert a strong force on each other at the crossing site. It is to be able to.

  Two screw bodies 6, 7 for screwing the clamping members 2, 3 are provided, and the pressing protrusions 11, 12 are arranged on a line 16 connecting the two screw bodies 6, 7. Moreover, as shown in FIG. 8, you may make it arrange | position the press protrusion 11 and 12 to the vertex of the isosceles triangle which makes the base the line 16 which ties the two screw bodies 6 and 8A.

  One of the two screw bodies 6 and 7 may be used as the anchor bolt 8, or the anchor bolt 8 is arranged at the apex of an isosceles triangle having a base 16 as a line 16 connecting the screw bodies 6 and 7, as shown in FIG. You can also

  A pressing portion 19 for bending the wire ropes 4 and 5 in cooperation with the pressing protrusions 11 and 12 is formed at the boundary edge between the rope grooves 9 and 10 and the voids 14 and 15 (see FIG. 4A). reference).

  Instead of forming the pressing projections 11 and 12 on the mating surfaces of the pinching members 2 and 3, as shown in FIG. 9, the pressing projections 11A and 12A that enter the rope grooves 9 and 10 cross the wire rope on the front and back. The intermediate member 20 formed at a portion other than the position can be interposed between the pinching members 2B and 3B.

  In the invention of the fastening method of the cross clip, when the wire ropes 4 and 5 that cross each other are secured using the cross clip, as shown in FIG. 6 (c), when the mating surfaces 2a and 3a come into close contact with each other, The screw fastening of the members 2 and 3 is stopped. Note that, as shown in FIG. 4 (d), the drawing strength of the wire rope may be changed by using the pressing members 2C having different heights of the pressing protrusions 11B.

  According to the present invention, a single rope groove is formed on the mating surface of each clamping member, and a pressing projection is provided on the mating surface of the opposing clamping member, and the pressing projection is a portion excluding the wire rope crossing position. Therefore, it is possible to bend the wire rope partially and place it in the space in the rope groove, and prevent the wire ropes from slipping out of the clip without exerting a large shearing force at the crossing site. I can leave.

  Since the rope groove formed on the mating surface is deep enough to immerse the wire rope, the wire rope will not receive a strong force from other mating surfaces except at the intersection. Even if it is bent by the pressing protrusion, the follow-up displacement at the front and rear portions thereof is allowed during the lashing operation, and the tension is not concentrated only on the bent portion, and the tension in the clip of the wire rope does not increase. The bent portion is not hatched as much as possible, and the original mechanical properties of the wire rope are maintained.

  It is not necessary to use an excessive quality rope in anticipation of the reduction of the mechanical properties of the wire rope at the crossing point, that is, the clip, and the clip itself is not enlarged. When bending the wire rope, it is not necessary to apply a force that crushes the crossing part of the wire rope, so the torque applied to the bolt is kept lower than required by the crushing type. It is done. Since it is only necessary to stop the fastening operation of the bolt when the facing portions of the metal fittings are brought into close contact with each other, the torque management required to be accurate at the construction site where the scaffolding is poor is eliminated. Rope hatching is eliminated, and wire ropes can be prevented from declining over time, and retightening after construction is not necessary. The stability of lashing with clips is improved, and the reliability of rockfall prevention facilities is dramatically increased.

  If the pressing protrusion is arranged on a line connecting two screw bodies for screwing the clamping member, the clamping pressure generated by the screw fastening can be most effectively converted to the pressing force of the pressing protrusion. Each of the intersecting wire ropes is securely bound by the pressing protrusions without being affected by the other wire ropes.

  Even if the pressing protrusions are arranged at the vertices of an isosceles triangle having the base connecting the two screw bodies, it is possible to generate an equal pressing force on each pressing protrusion. In this case, since one pressing protrusion is in a symmetrical position with respect to the other pressing protrusion, the wire rope can be bent equally.

  The two screw bodies for securing the clamping member may be used as bolts exclusively for securing, but when using such a clip as a cross anchor clip, an anchor bolt fixing hole is required separately. . However, if one of the two screw bodies is used as an anchor bolt, the fixing hole is not necessary, and simplification of the cross anchor clip can be promoted.

  If an anchor bolt mounting hole is provided at the apex of an isosceles triangle whose base is the line connecting the two screw bodies, the anchor bolt is placed as close as possible to the crossing portion of the wire rope. be able to. Even if force is applied to the pinching member from the wire rope, it can be transmitted to the ground at the nearest position, and the ground of the wire rope is most reliably fixed.

  If the pressing portion is secured at the boundary edge with the void in the rope groove, the wire rope is partially bent easily in cooperation with the pressing protrusion. If there is a pressing part, there is no hindrance to bending the rope even if the pressing protrusion is raised, and the pulling strength is greatly increased by giving a large bend.

  If an intermediate member formed on the front and back of the pressing protrusion that enters the rope groove is interposed between the pressing members, the pressing protrusion needs to be formed on the mating surface of the pressing member. Therefore, the shape of the pinching member can be simplified. It becomes easy to give the pressing protrusions that bend the rope different in size and height, and it is possible to provide a clip having different pulling strength by simply replacing the intermediate member. In any of the clips disclosed in the prior art, in principle, the wire rope must be bent up to the cross-sectional radius of the rope, but in the present invention, there is no particular obstacle to increasing the height of the pressing protrusion, Therefore, it becomes possible to deepen the bending of the wire rope and remarkably enhance the pulling strength.

  In the invention in the fastening method of the cross clip, when fastening the wire ropes that cross using the cross clip, the screw fastening of the clamping member is stopped when the mating surface comes into close contact. It is possible to prevent application of further torque to the screw body for screwing the member. Therefore, if the size of the pressing protrusion and the diameter and material of the wire rope are determined, the torque necessary to bring the mating surfaces into close contact with each other is determined, and the corresponding pulling strength at that time is naturally given. In other words, the operator who fastens the bolt in the mountain, which is difficult to stabilize the body, is freed from the delicate operation for precise torque management to apply a predetermined torque to the bolt by the operation of bringing the mating surfaces into close contact with each other.

  If the clamping members having different heights of the pressing protrusions are used, the torque required for screw fastening can be changed, whereby the pulling strength of the wire rope can be appropriately changed. It is possible to change the height of the protrusion itself by exchanging the head of the pressing protrusion, etc., so that it is possible to supply clamping members with different heights, and to apply to wire ropes of different diameters to make a versatile clip Will be able to.

  Hereinafter, a cross clip and a fastening method thereof according to the present invention will be described in detail with reference to the drawings. 1A is a plan view of the cross clip 1 and FIG. 1B is a front view thereof. The crossing portion of the wire ropes 4 and 5 is positioned between the pressing members 2 and 3 facing each other, and the crossing position is determined. A state is shown in which the clamping members 2 and 3 are screwed together by screw bodies 6 and 7 and the wire ropes 4 and 5 are secured to each other at the avoided site. Since this clip can be used as a cross anchor clip, an anchor bolt 8 having a threaded portion 8a engraved at the upper end thereof can be attached to fix the clip to a natural ground.

  In this cross anchor clip 1 as well, rope grooves 9 and 10 are formed on the mating surfaces 2a and 3a of the clamping members 2 and 3 as shown in FIG. Or it is given in a single line where the other is buried and fitted. In other words, each rope groove is formed to a depth at which the wire rope is completely immersed or very close to it. As a result, the wire rope positioned in the rope groove of one clamping member does not come into contact with the mating surface of the other clamping member, or a large force does not reach from the mating surface even if it comes into contact. Be contained.

  With respect to the rope grooves 9 and 10, the pressing protrusions 11 and 12 that allow the entire pressing members 11 and 12 to enter the rope grooves are provided on the mating surfaces of the pressing members facing each other, as shown in FIG. (See a))). In the rope grooves 9 and 10, cavities 14 and 15 for accommodating the bent portions 4a and 5a of the wire rope shown in FIG. 1B are formed at positions corresponding to the pressing protrusions. That is, the voids 14 and 15 are secured at positions excluding the wire rope crossing portions of the rope grooves 9 and 10 (see FIG. 1A). This is clearly shown in FIG. 2B, which is a plan view of the state where the pinching members are superposed.

  The pressing protrusions 11 and 12 have a rectangular shape in plan view and a bell shape in front view (see (b) in FIG. 1) in order to keep the shape simple, but may be a long trapezoidal shape without corners, It may be a protrusion made up of two or three small mountain groups arranged intermittently. In any case, when the screw fastening force of the screw bodies 6 and 7 is increased, the wire grooves enter the rope grooves 9 and 10 to form the bent portions 4a and 5a in the wire ropes and accommodate them in the cavities 14 and 15, respectively. What is necessary is just to become the press protrusion which functions to make it do.

  Two screw bodies 6 and 7 for fastening the clamping members 2 and 3 with screws are provided, and the pressing protrusions 11 and 12 are arranged on a line 16 (see FIG. 1A) connecting the two screw bodies. It is preferable that the points 11o and 12o indicating the centers of the pressing protrusions are located on the line 16). In this way, the pressing protrusions 11 and 12 can be applied with pressure most effectively, and the crossed wire ropes 4 and 5 are not affected by other wire ropes, A bend is formed reliably. Since the pressing protrusions are formed on the mating surfaces of the respective pressing members, as shown in FIG. 1A, the pressing protrusions are symmetrical with respect to the middle point 2m of the line connecting the two screw bodies. In this case, a pressing force for bending the wire rope is generated in substantially the same size, and the intersecting wire ropes are secured by receiving the same clamping pressure.

  Further paying attention to (a) of FIG. 1, the anchor bolt 8 is arranged at the apex position of an isosceles triangle whose base is the line connecting the screw bodies 6 and 7. A mounting hole 17 for this purpose is provided as shown in FIG. Most of the anchor bolts are driven into the ground, and the cross section of the wire rope is in close contact with the ground via the cross clip. A steel bar having a diameter larger than 6, 7 is employed (see FIG. 1B).

  If an isosceles triangle is formed as described above, the position of the anchor bolt 8 can be kept as close as possible to the intersecting portion while keeping the same distance from both wire ropes. Even if a large tension is applied to the wire rope 4 which is a vertical rope, it is transmitted to the ground at the position closest to the intersection through the pinching members 2 and 3, and the moment acting on the anchor bolt is kept as small as possible. The ground is fixed efficiently. Incidentally, bolts are used as the screw bodies 6 and 7, and a nut may be arranged on the lower surface of the lower clamping member and screwed into the nut, but in this example, a screw hole 18 is engraved. And screw it on.

  FIG. 3 shows a clamping member 2 as a presser fitting, and as can be seen from the left and right side views, the top and bottom plan views, and the bottom view shown around the center top view, the top surface is for forming a rope groove. In addition to the swelling, the mounting seats 6a and 7a of the screw body are formed so as to rise, but the mating surface 2a is a flat surface except for the rope groove 10 and the pressing protrusion 11. Yes.

  By the way, even if the voids 14 and 15 penetrate the rope grooves 9 and 10, they may be bottomed like a void 15 </ b> A shown in FIG. In any case, the holding portions 19 and 19 for bending the wire rope in cooperation with the pressing projections 11 and 12 at the boundary edge with the space in the rope groove that has become discontinuous due to the formation of the space are shown in FIG. (A). Incidentally, although there are some irregularities in the pinching member, since there is no wraparound part, even if casting or forging, the molding becomes complicated and it does not become time-consuming.

  All of the clips disclosed in the prior art are gentle bends caused by the mutual interference of wire ropes, and the entanglement of the ropes is shallow, and there is a limit to the increase in pull-out strength due to the bends. Even if the rope pull-out resistance increases compared to the case without bending, it is uncertain whether it can always be adapted when a large resistance is required in a rock fall prevention facility or the like. However, in this example, since the pressing portion is secured at the boundary between the rope groove and the void, the wire rope is partially bent easily in cooperation with the pressing protrusion. If the pressing portion is provided, the rope can be bent even if the pressing protrusion is raised. Therefore, if a certain degree of bending is applied, the pulling-out strength can be sufficiently increased. Since an originally straight wire rope generates a force to rebound when subjected to bending, an effect of preventing the loosening of the screw body is also incidentally induced, which is convenient.

  According to the cross clip having the above-described configuration, the pinching member can be screwed and the crossed wire ropes can be secured as follows. And the pulling-out strength of each wire rope can be improved without the wire ropes exerting a strong force on each other at the intersection. First, vertical ropes and horizontal ropes are put on an inclined ground, and in principle, each of them is, for example, spaced by 2 meters so that several lattices are formed. One such intersection is represented in FIG. In this figure, since the vertical rope 4 exists under the horizontal rope 5, the pinching member 3 faces the vertical rope 4 and the pinching member 2 faces the horizontal rope 5.

  The wire rope 4 is slightly lifted from the ground, and a pressing member 3 is inserted under the wire rope 4 as shown in the figure, and each wire rope is supported by a finger. Fit. Bolts 6 and 7 that have been previously attached to the clamping member 2 are brought into the screw holes 18 and are turned by hand to slightly engage. Next, when the bolts 6 and 7 are screwed using a wrench, the pressing protrusions 11 and 12 start to deform the wire ropes 4 and 5 at their heads as shown in FIG. If the bolt is further tightened, the bend is increased while pushing the rope into the space as shown in (b).

  When the mating surfaces 2a and 3a come into close contact as shown in FIG. 6C, the screwing of the bolts 6 and 7 is stopped. It is natural that the bolt does not advance even if the bolt is further operated, and the bending operation of the wire rope is also finished at this point. When the screw fastening of the clamping member is stopped, in this example, the tops of the bent portions 4a and 5a of the wire rope look out from the cavities 14 and 15. Since this is based on the height of the pressing protrusion, the bent portion can be kept in the void depending on the selection of the height. In any case, the wire rope bent to a certain extent does not slip out or shift from the clip. There is a correlation between the amount of bending and the torque exerted on the bolts 6 and 7 even if there is a slight width. Therefore, the screw fastening force that is applied to the pinching member by the height of the pressing protrusion is naturally determined. ing.

  Of course, it is also related to the position of the holding part 19 and the size of the shape given to it, but if you obtain data about the mutual relationship before construction and use a clip that matches the strength required for the construction, The burden of torque management when tightening screws is greatly reduced. It is also possible to determine whether or not the holding member has a predetermined pulling strength simply by observing whether the pinching member is in close contact. As can be seen, excessive torque is not applied to the screw body and subtle torque operations are eliminated, making it easy to check whether a predetermined torque has been applied after the fastening operation, greatly reducing the burden on the operator. It becomes.

  As can be seen from the above description, the wire ropes do not press against each other and are not pinched even if they are in the rope groove other than the crossing part. Is avoided. It is no longer necessary to select a rope in anticipation of a reduction in the mechanical properties of the wire rope at the intersection, and the clip itself can be made larger. Unlike the pulling strength due to contact friction, the generation of pulling strength due to bending deformation also reduces the operating force applied to the bolts to secure the wire rope. The re-tightening operation that recovers the decrease in the lashing force of the wire rope over time is unnecessary, and the stability of the lashing with the clip is constantly exerted to a high level, resulting in a rockfall prevention facility with dramatically improved reliability.

  Incidentally, although not shown, if the two pressing protrusions are asymmetrically arranged with respect to the midpoint of the line connecting the two screw bodies, an unequal pinching force can be applied to each wire rope. The horizontal rope in the rockfall prevention facility is to maintain the order of laying the vertical rope, but the vertical rope greatly contributes to holding the ground. Therefore, if a clip with strong or weak clamping pressure is used, an efficient lashing that eliminates excessive wastefulness in screw fastening operation by attaching a pressing projection on the side that overcomes the clamping pressure to the lashing of a vertical rope that is under great tension. Is achieved.

  FIG. 7A shows a cross clip for holding the crossing portion of the wire rope at a place where the anchor bolt is not used, and there is no mounting hole 17 in FIG. Since it is not necessary to attach an anchor bolt, the pinching member 2A having a shape in which the corresponding portion is cut as shown in FIG. In FIG. 7 (b), an anchor bolt 8A is used instead of the bolt 7, and an example of a cross clip that can be used as a cross anchor clip even with two screw bodies is shown. In this case, the anchor bolt fixing hole is not required separately, and the cross anchor clip can be provided in a simple form.

  FIG. 8 shows an example in which the pressing protrusions 11 and 12 are arranged at the vertices of an isosceles triangle whose base is a line connecting the screw body 6 and the anchor bolt 8A. Needless to say, the bolt 7 may be used instead of the anchor bolt. In this way, the pinching member is arranged at the apex of an isosceles triangle whose base is the line 16 connecting the two screw bodies, and one pressing projection is positioned symmetrically with respect to the other pressing projection with the bottom 16 interposed therebetween. If this is the case, equal bending can be easily applied to the wire ropes 4 and 5.

  FIG. 9 shows an intermediate member in which pressing protrusions 11A and 12A that enter the rope grooves 9 and 10 are formed at portions other than the front and back wire rope crossing positions instead of forming pressing protrusions on the mating surface of the pinching member. In this example, 20 is interposed between the pinching members 2B and 3B. If it does in this way, it will become unnecessary to form a press protrusion on the mating face of a pinching member, and the shape of a pinching member can be made simple. Pressing protrusions having different sizes and heights can be given to the intermediate member, and the ropes can be bent with different sizes and shapes.

  In this way, it is possible to prepare clips having different pulling strengths by simply replacing the intermediate member. In any of the clips disclosed in the prior art, in principle, the wire rope must be bent up to the cross-sectional radius of the rope, but in the present invention, there is no particular obstacle to increasing the height of the pressing protrusion. Therefore, if the bending of the wire rope is made moderately deep, the pulling strength can be enhanced.

  Incidentally, FIG. 4D is an example in which the pressure required for screw fastening can be changed by using the pressing members 2C having different pressing protrusion heights. This can change the bending strength by changing the shape of the bent portion only by exchanging a part of the pinching member. The configuration of the pressing protrusion 11B includes a base portion 11b and a head 11h, which are integrated via a fitting claw 21. Therefore, if different head sizes are used, the pulling strength can be made different, and the torque required for screw fastening can also be changed. When a low head is used, the empty space 15A can be made a bag space as shown in FIG. In any case, it can be applied to wire ropes having different diameters, and the clip is highly versatile.

  As can be seen from the above detailed description, a single rope groove is formed on the mating surface of each clamping member, and a pressing projection is formed on the mating surface of the opposing clamping member, and the pressing projection crosses the wire rope. Since the wire rope is partially bent and placed in the space in the rope groove, the wire ropes are not pulled out or displaced from each other without exerting a strong shearing force at the intersection. Is blocked.

  Since the rope groove formed on the mating surface has a depth that allows the wire rope to be fully immersed, the wire rope receives a strong force from the other mating surface from the other wire rope at the intersection, and from the other mating surface at the other portions. Therefore, even if the wire rope is bent by the pressing protrusion, the wire rope is allowed to be displaced during the lashing operation at the front and back portions thereof, and excessive tension is avoided at the bent portion. It is done. The hatching of the bent portion is reduced as much as possible, and the original properties such as mechanical strength possessed by the wire rope are not impaired. In addition, although the cross clip introduced in the rock fall prevention facility was described as an example, the present invention is not limited to this, and the clip is useful when the crossing portion of the wire rope is positioned and secured between the facing metal fittings. It becomes.

It is a cross clip which concerns on this invention, (a) is a top view of the state which tied the wire rope which cross | intersects, (b) is a front view. (A) is a top view showing the upper surface of an upper side clamping member, and the mating surface of a lower side clamping member, (b) is a top view when a clamping member is simply piled up and down. The top view of an upper side pinching member and its each surrounding surface figure. (A) And (b) is AA arrow directional view in FIG. 3 and BB arrow directional cross-sectional view, (c) And (d) is sectional drawing of a different example. Explanatory drawing of the procedure which secures the crossed wire rope. Explanatory drawing following FIG. The top view of the state which tied the wire rope with the pinching member of a different structure. The top view of the state which tied the wire rope with the pinching member which changed the position of the press protrusion. It is the cross clip which introduce | transduced the intermediate member, (a) is an exploded view, (b) is a wire rope fixed state sectional drawing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cross clip (cross anchor clip), 2, 2A, 2B, 2C, 3, 3B ... Clamping member, 2a, 3a ... Matching surface, 4, 5 ... Wire rope (vertical rope, horizontal rope), 4a, 5a ... Bent part, 6, 7 ... Screw body (bolt), 8 ... Anchor bolt, 8A ... Screw body (anchor bolt), 9, 10 ... Rope groove, 11, 11A, 11B, 12, 12A ... Pressing protrusion, 11b ... Base, 11h ... head, 13 ... wire rope crossing position, 14, 15, 15A ... vacant space, 16 ... line connecting two screw bodies, 19 ... pressing part, 20 ... intermediate member.

Claims (9)

In the cross clip where the crossing portion of the wire rope is positioned between the opposing pinching members, the pinching member is screwed at the site avoiding the crossing position, and the wire rope is secured.
On the mating surface of each clamping member, a single rope groove is formed in which one or the other of the intersecting wire ropes is fully immersed and fitted,
A pressing projection that allows the entire groove itself to enter the rope groove formed in the one and the other clamping members is provided at a portion excluding the wire rope crossing position on the mating surface of the other and one clamping member,
A space that is secured to generate a partial bent portion in the straight wire rope in the rope groove by increasing the screw fastening force and accommodates the bent portion corresponds to the pressing protrusion. Formed in position,
A cross clip characterized in that the pulling strength of each wire rope is improved without causing the wire rope to exert a strong mutual force at the crossing site even if the crossing wire rope is secured with a pinching member. .   2. The cross clip according to claim 1, wherein two screw bodies for screwing the clamping member are provided, and the pressing protrusion is arranged on a line connecting the two screw bodies.   The screw member for fastening the clamping member with two screws is provided, and the pressing protrusion is arranged at the apex of an isosceles triangle having a base connecting the two screw members. The listed cross clip.   The cross clip according to any one of claims 1 to 3, wherein one of the two screw bodies is an anchor bolt.   The cross clip according to any one of claims 1 to 3, wherein an anchor bolt mounting hole is provided at an apex of an isosceles triangle having a base connecting a line connecting the screw bodies. .   6. A pressing portion for bending a wire rope in cooperation with the pressing protrusion is formed at a boundary edge between the rope groove and the space. Cross clip described in.   Instead of forming pressing protrusions on the mating surface of the pinching member, an intermediate member in which pressing protrusions that enter the rope grooves are formed at portions other than the front and back wire rope crossing positions is interposed between the pressing members. The cross clip according to claim 1, wherein the cross clip is provided.   When fastening the crossed wire rope using the cross clip according to any one of claims 1 to 7, the screw fastening of the pinching member is stopped when the mating surfaces come into close contact with each other. Cross clip fastening method.   9. The method of fastening a cross clip according to claim 8, wherein the drawing strength of the wire rope is changed by using a pressing member having different heights of the pressing protrusions.