CN211872754U - Safety height limiting frame for road - Google Patents

Abstract

The utility model relates to a safety height-limiting frame is used to highway, it is including two bases that are fixed in ground, be fixed in two stands of two bases respectively, the height-limiting crossbeam and the lift device at the top of two stands are connected respectively at both ends, lift device includes the wire reel, jib and cable, the one end that the height-limiting crossbeam was kept away from in the stand is installed to the wire reel, the jib is located height-limiting crossbeam below, the jib is on a parallel with height-limiting crossbeam, the jib is located between two stands, two at least cables all erect the upper end of height-limiting frame, the wire reel includes rope winding axle and two baffles, rotate respectively at the both ends of rope winding axle and connect in two baffles, the one end of two at least cables all twines in the rope winding axle, the other end difference fixed connection of two at least cables is in the both ends. The utility model discloses have the effect of adjustment limit for height frame height limit that can be very fast.

Description

Safety height limiting frame for road

Technical Field

The utility model belongs to the technical field of the technique of highway height-limiting frame and specifically relates to a safety height-limiting frame for highway is related to.

Background

In order to limit the passing of overloaded vehicles on urban roads and reduce secondary dust emission of heavy vehicles and pollution to the atmosphere, at present, a plurality of cities are provided with height limiting frames on some key road sections of the urban roads. Although the arrangement of the height limiting frame restricts the passing of heavy vehicles to a certain degree, the arrangement also brings many inconvenient factors, such as the situation that special vehicles such as engineering rush-repair emergency, 120 emergency treatment, road sprinkling, environmental sanitation cleaning, cars and the like cannot pass normally after the height limiting frame is arranged on the road. And once an overrun driver neglects the passing of the height limit mark, the automobile or the height limit frame is damaged or personnel are injured, and the damaged height limit frame transversely spans on the highway to influence the normal passing of the highway.

Reference notice is CN 204690636U's utility model patent, this utility model discloses an adjustable current height limit for height frame, including two stands of crossbeam and supporting beam, still include jib and two at least iron chains, the one end of iron chain is fixed on the jib, the downside of crossbeam is equipped with the perforated plate, the iron chain hangs through C shape circle and establishes on the perforated plate, hangs the jib in the crossbeam below, when needs adjustment limit height, hang C shape circle on the unit ring of iron chain difference adjust can, use the both ends of low strength iron sheet clamping fixed jib, be fixed in the stand with the jib, if the vehicle is current by force or the mistake is gone, only strikes the jib, the jib deviates from, probably destroys the iron chain.

The above prior art solutions have the following drawbacks: when the height limit needs to be adjusted, the adjustment personnel need to suspend the passage of a road, the adjustment personnel are lifted by means of tools such as a ladder on the road, a plurality of iron chains are sequentially detached from the C-shaped ring, and other unit rings of the iron chains are sequentially hung in the C-shaped ring, so that the adjustment of the height limit of the whole height limit frame is time-consuming and labor-consuming, and the traveling of citizens is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a safety height-limiting frame for highway has the advantage of adjustment height-limiting frame height-limiting that can be very fast.

The utility model discloses a can realize through following technical scheme: the utility model provides a safety height-limiting frame is used to highway, is including two bases that are fixed in ground, two stands, the both ends that are fixed in two bases respectively connect the height-limiting crossbeam at the top of two stands and rise the hoist and mount and put, it includes wire reel, jib and cable to rise the hoist and mount to put, the wire reel is installed in the stand, the jib is located height-limiting crossbeam below, the jib is on a parallel with the height-limiting crossbeam, the jib is located between two stands, at least two the upper end of height-limiting frame is all erect to the cable, the wire reel includes around rope shaft and two baffles, the both ends of around rope shaft rotate respectively and connect in two baffles, at least two the one end of cable all twines in around rope shaft, at least two the other end difference fixed connection of cable is in the both ends of jib.

Through adopting above-mentioned technical scheme, when the height-limiting is increaseed to needs, rotate the wire reel, carry out the rolling to the stay cord, the jib risees, when the height-limiting is increaseed to needs, rotates the wire reel, unreels to the stay cord, and the jib reduces, consequently control the stay cord on the wire reel winding length can adjust the height-limiting of height-limiting frame, whole process convenient and fast according to actual need.

The utility model discloses further set up to: the two ends of the suspender are fixedly connected with fixing rings, the fixing rings are positioned on one side of the suspender, which faces the height limiting beam, the height limiting beam is fixedly connected with pulleys for simultaneously winding at least two inhaul cables, the pulleys are provided with a plurality of pulleys, the pulleys are positioned on one side of the height limiting beam, which is close to the suspender, and the pulleys are respectively distributed right above the fixing rings and at the connecting part of the bottom of the through hole and the height limiting beam;

the wire reel height limiting device is characterized in that a plurality of pulleys are distributed on one side, far away from the hanging rod, of the height limiting cross beam and are distributed on one side close to the through hole and the end portion of the height limiting cross beam respectively, and the pulleys located above the height limiting cross beam are located on one side, close to the wire reel, of the through hole.

Through adopting above-mentioned technical scheme, the one end that the rope winding axle was kept away from to two at least inhaul cables is jointly in proper order and is located the pulley of limit for height crossbeam tip, is close to the pulley sliding fit of through-hole, then respectively in proper order with the pulley of through-hole both sides, the pulley sliding fit of holding ring top, at last respectively with two solid fixed rings pass through the knot and connect. When the height of restriction of jib is adjusted to the wire reel rotating, guarantee that the jib keeps at the center of jib at the lift center of the in-process that goes up and down for the jib is more steady goes up and down the process, and accomplish the both ends of jib and go up and down in step, guarantees that the jib is on a parallel with limit for height crossbeam. The pulley sets up the removal that makes the jib at lift in-process cable more smooth, reduces the wearing and tearing to the cable, has also alleviateed adjustment personnel's operating strength. And keep away from the one side of jib at limit for height crossbeam and use a plurality of pulley to compare only with a pulley, only need accomplish with the bigger pulley of size with a pulley the utility model discloses the effect of the less pulley of well a plurality of, and bigger size pulley price has usually been higher than two less pulleys, and weight is also heavy a little, and the installation degree of difficulty of bigger size pulley is also higher than the installation degree of difficulty of the less pulley of a plurality of.

The utility model discloses further set up to: the two upright posts are respectively provided with a fixing frame for fixing two ends of the suspender, the fixing frame is connected to the corresponding upright posts in a sliding manner, and the fixing frame is provided with a fixing piece for fixing the fixing frame to the upright posts.

Through adopting above-mentioned technical scheme, when the restriction height of adjustment jib, sliding connection is convenient for adjustment personnel to adjust the restriction height of jib in the mount of stand, adjusts the restriction height back to needs when the jib, and the mount is fixed in the stand, prevents that the superelevation vehicle from adopting the artifical mode of lifting the jib current for current, has also prevented the jib swing that the air convection arouses simultaneously.

The utility model discloses further set up to: the mount includes sliding block and two clamping pieces, sliding block sliding connection is in the stand that corresponds, two clamping piece fixed connection is in the sliding block, two the interval sets up about the clamping piece, the both ends of jib respectively with two clamping piece interference fit that correspond.

Through adopting above-mentioned technical scheme, thereby when the super high vehicle current by force or the striking jib of mistake, because jib and mount are interference fit, two clamping pieces are deviate from to the jib, and the degree of freedom of jib risees, has reduced the utility model discloses to the damage of super high vehicle, also reduced super high vehicle simultaneously to the destruction of limit for height frame, reduce personnel injured probability.

The utility model discloses further set up to: the mounting includes threaded rod and fixed plate, threaded rod fixed connection is in the sliding block, the fixed plate is connected in the threaded rod, threaded rod threaded connection has the nut, the nut is located the fixed plate and keeps away from one side of sliding block, works as the jib is adjusted to the restriction height back of needs, the outer wall of fixed plate and stand is inconsistent, nut and fixed plate are inconsistent.

Through adopting above-mentioned technical scheme, unscrew the nut and make the nut break away from the threaded rod, can adjust the height-limiting of jib, screw up the nut and can convenient and fast fix the jib on the stand.

The utility model discloses further set up to: the rope winding shaft is provided with at least one end extending out of the baffle plate, and the end part of the rope winding shaft extending out of the baffle plate is fixedly connected with the rocking handle.

Through adopting above-mentioned technical scheme, the adjustment personnel can convenient and fast's adjustment jib limit height through wave the rocking handle, improved the utility model discloses the efficiency of adjustment limit height.

The utility model discloses further set up to: the wire spool is provided with at least one group of locking devices, each locking device comprises a transverse plate, a ratchet wheel and a pawl meshed with the ratchet wheel, the ratchet wheel is fixedly connected to one end of the rope winding shaft extending out of the baffle plate, and the rotation axis of the ratchet wheel is overlapped with the rotation axis of the rope winding shaft;

the transverse plate is fixedly connected to the baffle, the transverse plate is located above the ratchet wheel, the pawl is rotatably connected to the transverse plate, the rotating axis of the pawl is parallel to the rotating axis of the rope winding shaft, one end, far away from the rotating axis, of the pawl is fixedly connected with a spring, and two ends of the spring are fixedly connected to the transverse plate and the pawl respectively.

Through adopting above-mentioned technical scheme, when the restriction height of adjustment jib, rotate the wire reel and carry out the rolling or unreel to the cable, make the cable tightened, because the epaxial ratchet that is equipped with of wire winding, be equipped with the pawl that uses with the ratchet cooperation on the diaphragm, the spring gives the power of a orientation ratchet to the pawl, consequently, make when the cable is in the state of tightening, make the jib keep the restriction height after the adjustment, the wire winding axle can not the antiport, consequently, can avoid because the not hard up problem of cable that wire winding axle antiport leads to takes place.

The utility model discloses further set up to: and one side of the pawl, which is close to the transverse plate, is fixedly connected with a pull rod, and the pull rod penetrates through the transverse plate and extends out of the upper surface of the transverse plate.

By adopting the technical scheme, when the height of the suspender is required to be adjusted, the pull rod is pulled in the direction away from the ratchet wheel, so that the pawl is separated from the ratchet wheel, and the purpose of reversely rotating the rope winding shaft is achieved.

The utility model discloses further set up to: the lifting device further comprises an installation box used for accommodating the wire spool and the locking device, the installation box is installed on the base and comprises a box body and an opening and closing cover rotatably arranged on the box body, the opening and closing cover is located at the top of the box body, and a safety lock used for locking the installation box is installed between the opening and closing cover and the box body;

the opening and closing cover is provided with a movable opening through which the inhaul cable penetrates through the opening and closing cover, the movable opening is provided with two openings, one opening penetrates through the opening and closing cover, and the other opening faces the upright post.

By adopting the technical scheme, when the limit height needs to be adjusted, the safety lock is unlocked, the opening and closing cover is opened, the rocking handle and the locking device can be operated, and the operation is convenient, quick and safe; when the safety lock is used for locking the installation box, the opening and closing cover is fixed on the box body through the safety lock, the installation box is arranged to prevent personnel from operating the locking device and the wire spool by mistake, and meanwhile, the anti-theft effect is achieved; the movable opening is arranged, so that the inhaul cable can be wound and unwound conveniently, and the opening and closing of the opening and closing cover are not influenced.

The utility model discloses further set up to: the install bin is still including rotating the open-close board that sets up in the box, open-close board and open-close lid are adjacent, open-close board is located one side that the box is close to the rocking handle, open-close lid is close to a side fixedly connected with lockplate of open-close board, the lockplate is on a parallel with the open-close board, the outer wall counterbalance of lockplate and open-close board is in order to fix the open-close board in the box.

Through adopting above-mentioned technical scheme, when needs adjustment restriction height, the lid that opens and shuts is opened to the unblock safety lock, opens the plywood afterwards, can operate rocking handle and locking means, and the setting of plywood has increased the activity space of operation rocking handle, and convenient and fast is safety again, and the lid that opens and shuts is fixed in the box through the lockplate with the plywood to play the effect of pinning the install bin.

To sum up, the utility model discloses a beneficial technological effect does:

1. by arranging the lifting device, the height limiting device has the effect of conveniently and quickly adjusting the height limiting height of the height limiting frame;

2. the damage to the ultrahigh vehicle is reduced, the damage to the height limiting frame by the ultrahigh vehicle is reduced, and the injury probability of personnel is reduced;

3. has the effect of safety and theft prevention.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic view showing the connection relationship of the mounting box, the wire spool, the locking device and the cable when the mounting box is opened.

Fig. 4 is an enlarged schematic view of the structure at B in fig. 1.

FIG. 5 is a schematic view of the structure of the spool, the locking device and the cable.

Fig. 6 is an enlarged schematic view of the structure at C in fig. 1.

Fig. 7 is a schematic structural view of the fixing frame.

In the figure, 1, a base; 2. a column; 3. a height limiting cross beam; 4. flashing lights; 5. an electronic monitoring device; 6. installing a box; 61. a box body; 62. opening and closing the cover; 63. opening and closing the board; 64. a safety lock; 65. a first opening; 66. a second opening; 67. a locking plate; 68. a movable opening; 7. a wire spool; 71. a rope winding shaft; 72. a baffle plate; 73. a rocking handle; 74. a stringing hole; 8. a boom; 9. a cable; 10. a through hole; 11. a pulley; 111. a first pulley; 112. a second pulley; 113. a third pulley; 114. a fourth pulley; 115. a fifth pulley; 116. a sixth pulley; 12. a fixing ring; 13. a transverse plate; 14. a ratchet wheel; 15. a pawl; 16. a spring; 17. a pull rod; 18. a pull ring; 19. a fixed mount; 191. a slider; 192. a clip; 193. a fixing member; 1931. a threaded rod; 1932. a fixing plate; 1933. a nut; 20. a sliding groove; 21. and (5) scale marking.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a safety height-limiting frame for highway, including two bases 1 that are fixed in ground, two stands 2 that are fixed in two bases 1 respectively, the height-limiting crossbeam 3 and the lift device at the top of two stands 2 are connected respectively at both ends. And an explosion flashing lamp 4 is arranged above the height-limiting beam 3. And traffic auxiliary equipment such as an electronic monitoring device 5 and the like are also arranged above the height limiting beam 3.

The lifting device comprises an installation box 6, a suspender 8 and a guy cable 9. The mounting box 6 is mounted to one of the bases 1. The installation box 6 is fixed in the base 1 upper surface, and installation box 6 is located and is kept away from the one side of limit for height crossbeam 3 corresponding to stand 2.

Referring to fig. 2, the mounting box 6 includes a box 61, an opening/closing cover 62 rotatably provided on the box 61, and an opening/closing plate 63. A safety lock 64 for locking the installation box 6 is installed between the open/close cover 62 and the box body 61.

Referring to fig. 1 and 3, the installation case 6 is shaped like a rectangular body, and a cavity is formed in the case body 61. The box body 61 is provided with a first opening 65 arranged upwards and a second opening 66 arranged on one side surface of the box body 61, the first opening 65 is arranged at the top of the box body 61, and the side wall of the box body 61 where the second opening 66 is arranged is perpendicular to one side of the upright post 2 away from the height-limiting beam 3. The opening and closing cover 62 is located at the first opening 65, and one side edge of the opening and closing cover 62 is hinged to one side edge of the first opening 65 far away from the corresponding upright post 2. The opening plate 63 is located at the second opening 66, and one side plate of the opening plate 63 is hinged to one side edge of the second opening 66 close to the base 1. One side edge of the opening and closing cover 62 close to the opening and closing plate 63 is fixedly connected with a locking plate 67, the locking plate 67 is parallel to the opening and closing plate 63, and the locking plate 67 is abutted with the outer wall of the opening and closing plate 63 to fix the opening and closing plate 63 on the box body 61.

The wire spool 7 is installed in the box body 61, the wire spool 7 comprises a rope winding shaft 71 and two baffles 72, two ends of the rope winding shaft 71 are respectively and rotatably connected to the two baffles 72, and the axial line of the rope winding shaft 71 is perpendicular to the length direction of the upright post 2 along the length direction. The two baffles 72 are fixedly connected in the box body 61, one baffle 72 is contacted with the inner wall of the box body 61, and a gap is arranged between the other baffle 72 and the opening plate 63. A baffle plate 72 extends from one end of the rope winding shaft 71 close to the opening plate 63. A rocking handle 73 is fixedly connected to one end of the rope winding shaft 71 extending out of the baffle plate 72.

There are at least two cables 9, and in this embodiment, there are two cables 9. Both the two wires 9 are wound around the wire winding shaft 71. The rope winding shaft 71 is provided with a rope threading hole 74, and the axial direction of the rope threading hole 74 is perpendicular to the axial direction of the rope winding shaft 71. One end of each of the two pulling cables 9 penetrates through the rope passing hole 74 and extends out of the rope passing hole 74, one end of each of the two pulling cables 9 extending out of the rope passing hole 74 is mutually wound to form a knot, and the size of the knot is larger than that of the rope passing hole 74. One end of the two cables 9 far away from the knot is wound on the cable winding shaft 71.

The opening and closing cover 62 is provided with a movable opening 68 for the two inhaul cables 9 to penetrate through the opening and closing cover 62, the movable opening 68 is positioned on the opening and closing cover 62, the movable opening 68 is provided with two openings, one opening penetrates through the opening and closing cover 62, and the other opening faces the corresponding upright post 2.

Referring to fig. 1 and 4, a through hole 10 is vertically formed in the middle of the height-limiting beam 3. The height-limiting beam 3 is fixedly connected with a pulley 11 for winding two inhaul cables 9. Preferably, there are six pulleys 11, respectively a first pulley 111, a second pulley 112, a third pulley 113, a fourth pulley 114, a fifth pulley 115 and a sixth pulley 116. First pulley 111 and second pulley 112 are fixed connection in the one side that height-limiting crossbeam 3 kept away from base 1, and first pulley 111 and second pulley 112 all lie in the same side of through-hole 10, and first pulley 111 lies in by through-hole 10, and second pulley 112 lies in the tip of height-limiting crossbeam 3 and lies in directly over wire reel 7.

The suspender 8 is parallel to the height-limiting beam 3, the suspender 8 is positioned under the height-limiting beam 3, and the two ends of the suspender 8 are fixedly connected with fixing rings 12. The third pulley 113, the fourth pulley 114, the fifth pulley 115 and the sixth pulley 116 are all fixedly connected to one side of the height-limiting beam 3 close to the suspension rod 8. The third pulley 113 and the fourth pulley 114 are respectively positioned right above the two fixing rings 12, and the fifth pulley 115 and the sixth pulley 116 are positioned at two sides of the through hole 10 along the length direction of the height-limiting beam 3 and at the turning part of the outer wall of the height-limiting beam 3. One ends of the two guys 9 far away from the rope winding shaft 71 firstly penetrate through the movable opening 68 together, then are in sliding fit with the second pulley 112 and the first pulley 111 together in sequence, and then are in sliding fit with the fifth pulley 115, the third pulley 116, the sixth pulley 113 and the fourth pulley 114 in sequence respectively, and finally are connected with the two fixing rings 12 through knots respectively. The length of the guy cable 9 extending out of the movable opening 68 can be adjusted by swinging the rocking handle 73, and the height limit of the suspension rod 8 can be adjusted.

Referring to fig. 3 and 5, the spool 7 is mounted with a locking device, which is located within the case 61. The locking means is located in the gap between the shutter 72 and the opening plate 63. The locking means comprises a cross plate 13, a ratchet wheel 14 and a pawl 15 which engages the ratchet wheel 14. The ratchet 14 is fixedly connected to one end of the rope winding shaft 71 extending out of the baffle plate 72, the ratchet 14 is positioned between the rocking handle 73 and the baffle plate 72, and the rotation axis of the ratchet 14 is coincident with the rotation axis of the rope winding shaft 71.

The transverse plate 13 is fixedly connected to the baffle plate 72, the transverse plate 13 is parallel to the bottom wall of the box body 61, the transverse plate 13 is positioned between the baffle plate 72 where the ratchet wheel 14 is positioned and a gap formed by the inner wall of the box body 61, and the transverse plate 13 is positioned right above the ratchet wheel 14. The pawl 15 is pivotally connected to the cross plate 13 on the side thereof adjacent to the ratchet wheel 14 by means of a pivot pin, the pivot axis of the pawl 15 being parallel to the pivot axis of the cord winding shaft 71. A spring 16 is fixedly connected to the end of the pawl 15 remote from its axis of rotation. The two ends of the spring 16 are fixedly connected to the side of the transverse plate 13 and the side of the pawl 15 close to the transverse plate 13 respectively. One side of the pawl 15 close to the transverse plate 13 is fixedly connected with a pull rod 17, the pull rod 17 penetrates through the transverse plate 13 and extends out of the upper surface of the transverse plate 13, and one end of the pull rod 17 far away from the transverse plate 13 is fixedly connected with a pull ring 18.

Referring to fig. 1 and 6, the two columns 2 are provided with a sliding groove 20 on opposite sides, and the length direction of the sliding groove 20 is arranged along the length direction of the column 2. Preferably, the sliding groove 20 has a T-shaped cross-section. And fixing frames 19 for respectively fixing two ends of the suspender 8 are respectively arranged on the opposite sides of the two upright posts 2. The outer walls of the two upright posts 2 provided with the fixing frames 19 are provided with scale marks 21 so as to conveniently observe the limited height of the suspender 8 which needs to be adjusted.

Referring to fig. 6 and 7, the fixing frame 19 includes a sliding block 191 and two clips 192. The sliding block 191 is slidably engaged with the sliding groove 20, and the maximum width of the sliding block 191 in the sliding groove 20 is larger than the maximum width of the notch of the sliding groove 20. The two clamping pieces 192 are fixedly connected to one side of the sliding block 191 far away from the sliding groove 20, the two clamping pieces 192 are arranged in parallel, and the two clamping pieces 192 are arranged at intervals up and down. The two ends of the suspension rod 8 are respectively in interference fit with the two corresponding clips 192.

Fixing member 193 includes threaded rod 1931 and fixed plate 1932, and threaded rod 1931 is fixed connection in the one end of sliding block 191 along the length direction of sliding tray 20, and threaded rod 1931 is located the one side that sliding block 191 is far away from sliding tray 20, and threaded rod 1931 is located the top or the below of two jaws 192, and in this embodiment, threaded rod 1931 is located the below of two jaws 192. Threaded rod 1931 is located in the notch of slide channel 20. The fixing plate 1932 is sleeved on the threaded rod 1931, and the threaded rod 1931 is in threaded connection with a nut 1933. After the suspender 8 is adjusted to a required height limit, the two ends of the fixing plate 1932 are respectively abutted against the outer walls of the two sides of the notch of the sliding groove 20, and the fixing plate 1932 is locked on the upright post 2 by the nut 1933.

The utility model discloses an implement the principle and do: when the height limit needs to be adjusted to be high, the nut 1933 is unscrewed, the nut 1933 is separated from the fixing plate 1932, the rocking handle 73 is shaken, the pull rope 9 is wound, the suspender 8 is lifted, the pawl 15 and the ratchet wheel 14 are in meshing transmission, the suspender 8 keeps the adjusted height, and the nut 1933 is screwed down; when the height limit needs to be reduced, the nut 1933 is unscrewed, the nut 1933 is separated from the fixing plate 1932, the pull rod 17 is pulled in the direction away from the ratchet wheel 14, the pawl 15 is separated from the ratchet wheel 14, the rocking handle 73 is shaken, the pull rope 9 is unreeled, the hanging rod 8 is lowered, the pull rod 17 is loosened, the pawl 15 and the ratchet wheel 14 recover meshing transmission, the hanging rod 8 keeps the adjusted height through the meshing transmission of the pawl 15 and the ratchet wheel 14, and the nut 1933 is screwed down. When an ultrahigh vehicle impacts the height limiting frame, the hanger rod 8 is in interference fit with the fixing frame 19, the hanger rod 8 is separated from the fixing frame 19, the degree of freedom is increased, and the injury probability of personnel is reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides a highway is with safe limit for height frame which characterized in that: the lifting device comprises two bases (1) fixed on the ground, two stand columns (2) respectively fixed on the two bases (1), a height-limiting beam (3) with two ends respectively connected with the tops of the two stand columns (2), and a lifting device, wherein the lifting device comprises wire reels (7), a lifting rod (8) and cables (9), the wire reels (7) are installed on the stand columns (2), the lifting rod (8) is positioned below the height-limiting beam (3), the lifting rod (8) is parallel to the height-limiting beam (3), the lifting rod (8) is positioned between the two stand columns (2), at least two cables (9) are all erected at the upper end part of the height-limiting frame, each wire reel (7) comprises a rope winding shaft (71) and two baffles (72), two ends of the rope winding shaft (71) are respectively rotatably connected to the two baffles (72), one ends of at least two cables (9) are wound on the rope winding shaft (71), the other ends of the at least two inhaul cables (9) are respectively and fixedly connected to the two ends of the suspender (8).

2. A safety height-limiting frame for road according to claim 1, wherein: the two ends of the suspender (8) are fixedly connected with fixing rings (12), the fixing rings (12) are positioned on one side, facing the height limiting beam (3), of the suspender (8), the height limiting beam (3) is fixedly connected with pulleys (11) for enabling at least two inhaul cables (9) to be wound simultaneously, the pulleys (11) are provided with a plurality of pulleys (11), the pulleys (11) are positioned on one side, close to the suspender (8), of the height limiting beam (3), and the pulleys (11) are distributed right above the fixing rings (12) and at the connecting part of the bottom of the through hole (10) and the height limiting beam (3) respectively;

one side of the height limiting cross beam (3) far away from the hanging rod (8) is also distributed with a plurality of pulleys (11), and the pulleys are respectively distributed on one side close to the through hole (10) and the end part of the height limiting cross beam (3), and the pulley (11) above the height limiting cross beam (3) is located on one side of the through hole (10) close to the wire spool (7).

3. A safety height-limiting frame for road according to claim 1, wherein: two mount (19) at the both ends of fixed jib (8) are installed respectively to stand (2), mount (19) sliding connection is in corresponding stand (2), be equipped with on mount (19) and be fixed in mounting (193) of stand (2) with mount (19).

4. A safety height-limiting frame for road according to claim 3, wherein: the mount (19) includes sliding block (191) and two clamping pieces (192), sliding block (191) sliding connection is in corresponding stand (2), two clamping piece (192) fixed connection is in sliding block (191), two interval sets up about clamping piece (192), the both ends of jib (8) respectively with two clamping pieces (192) interference fit that correspond.

5. A safety height-limiting frame for road according to claim 3, wherein: the fixing part (193) comprises a threaded rod (1931) and a fixing plate (1932), the threaded rod (1931) is fixedly connected to the sliding block (191), the fixing plate (1932) is connected to the threaded rod (1931), the threaded rod (1931) is in threaded connection with a nut, the nut is located on one side, away from the sliding block (191), of the fixing plate (1932), when the suspension rod (8) is adjusted to a required limiting height, the outer walls of the fixing plate (1932) and the upright column (2) are inconsistent, and the nut and the fixing plate (1932) are inconsistent.

6. A safety height-limiting frame for road according to claim 1, wherein: at least one end of the rope winding shaft (71) extends out of the baffle plate (72), and the end part of the rope winding shaft (71) extending out of the baffle plate (72) is fixedly connected with a rocking handle (73).

7. A safety height-limiting frame for road according to claim 1, wherein: the winding disc (7) is provided with at least one group of locking devices, each locking device comprises a transverse plate (13), a ratchet wheel (14) and a pawl (15) meshed with the ratchet wheel (14), the ratchet wheel (14) is fixedly connected to one end, extending out of the baffle plate (72), of the rope winding shaft (71), and the rotating axis of the ratchet wheel (14) is overlapped with that of the rope winding shaft (71);

diaphragm (13) fixed connection is in baffle (72), diaphragm (13) are located ratchet (14) top, pawl (15) rotate to be connected in diaphragm (13), the axis of rotation of pawl (15) is on a parallel with the axis of rotation of wiring axle (71), the one end fixedly connected with spring of its axis of rotation is kept away from to pawl (15), the both ends of spring are fixed connection in diaphragm (13) and pawl (15) respectively.

8. A safety height-limiting frame for road use according to claim 7, wherein: one side of the pawl (15) close to the transverse plate (13) is fixedly connected with a pull rod (17), and the pull rod (17) penetrates through the transverse plate (13) and extends out of the upper surface of the transverse plate (13).

9. A safety height-limiting frame for road according to claim 1, wherein: the lifting device further comprises an installation box (6) used for accommodating the wire spool (7) and the locking device, the installation box (6) is installed on the base (1), the installation box (6) comprises a box body (61) and an opening and closing cover (62) rotatably arranged on the box body (61), the opening and closing cover (62) is located at the top of the box body (61), and a safety lock (64) used for locking the installation box (6) is installed between the opening and closing cover (62) and the box body (61);

the opening and closing cover (62) is provided with a movable opening (68) for the stay cable (9) to penetrate through the opening and closing cover (62), the movable opening (68) is provided with two openings, one opening penetrates through the opening and closing cover (62), and the other opening faces the upright post (2).

10. A safety height-limiting frame for road use according to claim 9, wherein: install bin (6) are still including rotating open-close plate (63) that sets up in box (61), open-close plate (63) and open-close lid (62) are adjacent, open-close plate (63) are located box (61) and are close to one side of rocking handle (73), open-close lid (62) are close to one side fixedly connected with lockplate (67) of open-close plate (63), lockplate (67) are on a parallel with open-close plate (63), the outer wall conflict of lockplate (67) and open-close plate (63) is in box (61) with fixed open-close plate (63).

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