Description of drawings
Accompanying drawing 1 is the structural drawing of anchor ear commonly used;
Accompanying drawing 2 is the nut pilferproof closure;
Accompanying drawing 3 is the A-A sectional view of Fig. 2;
Accompanying drawing 4 is a spring ring;
Accompanying drawing 5 is a kind of structural drawing of anti-theft anchor ear;
Accompanying drawing 6 is the application principle figure of nut pilferproof closure;
Accompanying drawing 7 is the structural drawing of cover picker;
Accompanying drawing 8 is the structural drawing of bolt skull;
The application principle figure of accompanying drawing 9 bolt skulls;
Accompanying drawing 10 is the structural drawing of the antitheft cover of iron splint;
Accompanying drawing 11 is the application schematic representation of the antitheft cover of iron splint;
Accompanying drawing 12 is the schematic perspective view that the anti-theft anchor ear of the antitheft cover of iron splint has been installed;
Accompanying drawing 13 is second kind of structural drawing of the antitheft cover of iron splint;
Accompanying drawing 14 is the rear view of Figure 13;
Accompanying drawing 15 is the B-B sectional view of Figure 13;
Accompanying drawing 16 is a pick-proof iron bowl;
Accompanying drawing 17 is the application schematic representation of the pick-proof iron bowl of the antitheft cover of iron splint of Figure 13 and Figure 16;
Accompanying drawing 18 is the cable theft-prevention cover;
Accompanying drawing 19 is the application drawing of cable theft-prevention cover;
Accompanying drawing 20 is the C-C sectional view of Figure 19;
Accompanying drawing 21 is the sectional view of steel strand stealingproof sleeve.
Embodiment
As shown in Figure 1, cable anchor ear commonly used is installed is comprised iron splint 4 and a pair of anchor ear circle 1, there are nut 2 and bolt 3 in the two ends of anchor ear circle, and iron splint comprises two iron plates and the three pairs of bolts, nut, and wherein the nut 5 at center and bolt fix iron splint and anchor ear circle.
Anti-theft anchor ear of the present invention comprises a pair of anchor ear circle 1 and iron splint 4, and there are nut 2 and bolt 3 in the two ends of anchor ear circle, and iron splint comprises two iron plates and the three pairs of bolts, nut, and wherein the nut 5 at center and bolt fix iron splint and anchor ear circle.It also comprises as Fig. 2, nut pilferproof closure 8 shown in Figure 3.This nut pilferproof closure is made up of the spring ring 13 (referring to Fig. 4) of metallic sheath 9, plastic bushing 10 and the opening of round cup shape.There is a hole 11 bigger slightly than the diameter of bolt at the center of the bottom surface of metallic sheath 9.There is a hex hole 12 at the middle part of plastic bushing, and this hole also can be other shape, as long as consistent with the profile of nut.The size of above-mentioned hex hole is slightly littler than nut.The periphery of plastic bushing is circular, and is slightly littler than the diameter of the inner chamber of metallic sheath.The groove that an annular is arranged on the plastic bushing outer wall also has the groove of an annular on the inwall of metallic sheath, this groove is relative with the groove location on the plastic bushing outer wall.In the groove and the groove on the plastic bushing on the above-mentioned metallic sheath of described spring ring 13 embeddings, metallic sheath 9 and plastic bushing 10 are combined.As shown in Figure 5, nut pilferproof closure 8 has three, is enclosed within respectively on the nut 5 at the nut 2 at anchor ear circle two ends and iron splint center.
When this anti-theft anchor ear is installed, earlier with anchor ear circle 1 and iron splint 4 usefulness bolts and fixed by nut to electric pole, and install steel strand 7.Nut pilferproof closure 8 firmly is enclosed within on the nut at the nut at anchor ear circle two ends and iron splint center, available instrument is firmly squeezed into the nut pilferproof closure again.As shown in Figure 6, plastic bushing 10 tightly is set to the outside of nut 15, and the afterbody of bolt 14 stretches out from the hole at the center of the metallic sheath of nut pilferproof closure.Metallic sheath will rotate with respect to plastic bushing 10 and nut 15, and nut can't be taken off, and also the nut pilferproof closure can't be taken off with other instrument commonly used, thereby play good antitheft effect as if metallic sheath 9 rotations of clamping the nut pilferproof closure with pipe wrench this moment.
This nut pilferproof closure 8 also can be used in other occasion separately, for example, is used on the nut of overhead conductor iron tower, also can play good antitheft effect.
Above-mentioned nut pilferproof closure 8 needs just can take off with the cover picker of special use, the structure of this cover picker as shown in Figure 7, it comprises a columnar cover, this cover comprises tubular outer wall 19 and a bottom surface 16.The degree of depth of the inner chamber 20 of cover is close with the length of bolt 14, and the diameter of inner chamber 20 is bigger slightly than the external diameter of the metallic sheath 9 of described nut pilferproof closure 8.The access hole of tubular outer wall 19 respectively has a tapped hole 22 along the relative both sides of locating.This tapped hole also can have 3 or 4, is evenly distributed on the circumference.Respectively screw in one piece of screw 21 in the above-mentioned tapped hole.There is a bolt hole 18 at the center of the bottom surface 16 of cover picker, screws in one piece in the bolt hole and gets bonnet bolt 17.This cover picker is enclosed within the outside of nut pilferproof closure 8, screw 21 on the tubular outer wall 19 of turn makes it to hold out against mutually with the outer wall of the metallic sheath 9 of nut pilferproof closure, and bonnet bolt 17 is got in turn again, make and get the bonnet bolt top, just nut pilferproof closure 8 can be taken off from nut 15 to bolt 14.
Also can install a bolt skull 23 with the structure similar nut pilferproof closure as shown in Figure 8 on the bolt head at anchor ear circle 1 two ends additional and increase theftproof performance.As shown in Figure 8, bolt skull 23 is made up of the spring ring 27 of crown cap 24, plastic inner lining 25 and the opening of round cup shape.There is a hole 29 at the middle part of plastic inner lining, this hole be shaped as the hexagon identical with the shape of bolt head, its size is slightly littler than bolt head.The periphery of plastic inner lining is circular, and is slightly littler than the diameter of the inner chamber of crown cap 24.The groove 28 that an annular is arranged on the plastic inner lining outer wall also has the groove 26 of an annular on the inwall of crown cap, this groove is relative with the groove location on the plastic inner lining outer wall.Described spring ring 27 embeds in the groove 26 and the groove 28 on the plastic inner lining of above-mentioned crown cap inwall, and crown cap 24 and plastic inner lining 25 are combined.Bolt skull 23 needs two, is enclosed within the head of the bolt 3 at anchor ear circle two ends respectively.
The use principle of this bolt skull 23 as shown in Figure 9.Bolt skull 23 firmly is buckled in the outside of bolt head 30, and available hammer is squeezed into, and can prevent with spanner wrenching bolt head 30.If clamp 23 turns of bolt skull with pipe wrench, crown cap 24 will slide with respect to plastic inner lining 25, thereby bolt is rotated.During dismounting, have only earlier with aforesaid cover picker and take off nut pilferproof closure on the nut of the other end, screw off nut again, bolt skull 23 is taken off together with bolt, could with instrument the bolt skull be taken off from bolt again.
This anti-theft anchor ear can also comprise the antitheft cover 31 of iron splint as shown in figure 10.The antitheft cover of this iron splint comprises the iron plate of a block length bar shaped, the lower edge of iron plate have three with iron splint on three corresponding semicircle orifices of bolt.Wherein the radius of Zhong Jian semicircle orifice 32 is a bit larger tham the radius of bolt, and certain length is extended on the both sides 34 of this semicircle orifice downwards.The radius of the semicircle orifice 33 on both sides is a bit larger tham the external radius of a circle of nut, and the peritreme of these two semicircle orifices is routed up into a semicircle flange 35 forward, and the width of this flange is suitable with the thickness of nut.The upper limb of iron plate turns down into a flanging 57 backward again.As Figure 11 and shown in Figure 12, the both sides 34 of the semicircle orifice 32 of the centre of the antitheft cover of iron splint be inserted in iron splint the center nut 5 below, the flange 35 on the semicircle orifice 33 on both sides covers on the nut 6 on iron splint both sides.In this structure, the nut 6 on both sides is covered by the flange 35 on the semicircle orifice 33 on the both sides of the antitheft cover of iron splint, just can't use the spanner turn, plays antitheft effect.
As Figure 13, Figure 14 and shown in Figure 15, can also respectively there be a stiffening rib 36 at the two ends of the antitheft cover 31 of the iron splint in this anti-theft anchor ear, to increase its intensity.Two limiting stoppers 37 that protrude are downwards arranged in the portion that turns back of the upper limb of the antitheft cover of iron splint, certain length is extended at the two end part 38 of the flanging of the upper limb of the antitheft cover 31 of iron splint downwards, and the length of the antitheft cover 31 of iron splint is greater than the length of iron splint 4, can make the end of iron splint that enough spaces are arranged, be used for steel strand stealingproof sleeve 51 (is represented with double dot dash line among Figure 17, will carefully state below) or the end of cable theft-prevention cover cover, make theftproof performance better.In addition, as Figure 13 and shown in Figure 14, the semicircle orifice 33 on the both sides of the antitheft cover of this iron splint laterally can be wideer slightly, so that certain adjusting surplus is arranged, still can use when the pitch-row of iron splint 4 is variant slightly.
This anti-theft anchor ear can also comprise pick-proof iron bowl 39 shown in Figure 16.This pick-proof iron bowl comprises the base plate 40 of a circle, and there is a hole 42 bigger slightly than the diameter of bolt at the center of base plate, the chimb 41 that the periphery of base plate has a circle upwards to dig, and the internal diameter of this chimb is bigger slightly than the external diameter of described nut pilferproof closure 8.The application of this pick-proof iron bowl 39 below the center of iron splint 31 nut 5, is overlapped upper cap nut pilferproof closure 8 with its pad as shown in figure 17 again on center nut 5, anti-nut pilferproof closure is here prized, and makes the anti-theft capability of nut pilferproof closure 8 stronger.
This anti-theft anchor ear can also comprise cable theft-prevention cover 43 shown in Figure 180.This cable theft-prevention cover is the steel plate of a long strip, this steel plate has a steel strand groove 44 and a wire way 45 at length direction, steel strand groove and wire way parallel, article two, be uniform-distribution with fixed hole 46 at length direction between the groove, also be uniform-distribution with fixed hole 47 on the length direction on two edges of plate edge.As Figure 19 and shown in Figure 20, it is one group that this cable theft-prevention is overlapped per two, is involutory together, and steel strand 7 and cable 50 are clipped in the middle, and passes fixed hole 46,47 position that is fixed with screw 48.One end of cable theft-prevention cover withstands the fixedly iron splint 4 of steel strand, the other end blocks with the spacing card 49 of steel wire, as long as cable theft-prevention cover long enough, for example 1.5 meters long, stealer is climbed on electric pole and the cable theft-prevention cover can't be cut off with pliers, also reach the exposed part of steel strand and cable, can play well antitheft effect.
Above-mentioned cable theft-prevention cover 43 also can replace with steel strand stealingproof sleeve 51 as shown in figure 21.This steel strand stealingproof sleeve comprises cover cap 52 and base plate 54, and the cross section of cover cap becomes reversed V-shape, and flanging 55 is inwardly turned back on the both sides of reversed V-shape end opening respectively, and the top of cover cap is bent upwards into a rib that raises up 53.The cross section of base plate 54 becomes in-line, middle part 56 recessed cambers, and base plate is inserted in the bottom of cover cap, and the both sides of base plate snap in the flanging 55 of cover cap bottom.This steel strand stealingproof sleeve can form with the steel plate bending.
As Figure 12 and shown in Figure 17, steel strand stealingproof sleeve 51 is enclosed within steel strand 7 outsides, an end withstands iron splint 4, and the other end fastens with the spacing card of steel wire and steel strand 7 and cable, and steel strand stealingproof sleeve 51 and iron splint 4 are held out against.Only drawn a steel strand stealingproof sleeve among Figure 12, when reality was used, the two ends of iron splint 4 were respectively with a steel strand stealingproof sleeve.Stealer is climbed on electric pole can't cut the steel strand stealingproof sleeve with pliers, also reaches the exposed part of steel strand, just can play good antitheft effect.When the diameter of steel strand is thin, the base plate in the steel strand stealingproof sleeve 51 54 oppositely can be inserted, the arc that makes middle part 56 upwards reduces the inner space.
As Figure 13 and shown in Figure 15, can also respectively there be a boss piece 58 both sides of the semicircle orifice 32 of the centre of the antitheft cover 31 of described iron splint.As shown in figure 16, respectively there is a circular hole 59 that matches with above-mentioned boss piece the both sides in the hole 42 at the base plate center of pick-proof iron bowl 39.Circular hole 59 on the pick-proof iron bowl is enclosed within on the boss piece 58, after center nut 5 screws, the antitheft cover of iron splint can be blocked, thereby further increase its theftproof performance.