CN210852250U - Rotary ladder on side pull box of relay truck - Google Patents

Abstract

The utility model relates to a revolving ladder on side-pull box of relay truck, including the carriage, set up the recess with outside intercommunication on the lateral wall in carriage, set up the breach that communicates with carriage inside and pull mouth on the recess, it is connected with the pull board to slide in the recess, the pull groove has been seted up on the pull board, the pull inslot is provided with the carriage, equal rigid coupling has the slider on the both sides wall of carriage, the lateral wall that two sliders deviate from the carriage pastes with the lateral wall in pull groove respectively mutually, the top closure and the bottom lateral wall of slider paste with the top lateral wall and the bottom lateral wall in pull groove respectively, the slider slides with the pull groove and is connected, the rigid coupling has two to carry out spacing first dog to the slider in the pull groove, the upper surface of carriage is provided with the rotor plate, be provided with the subassembly that slides that supplies the rotor plate to slide on the carriage between rotor plate and the carriage, it has the folding ladder.

Description

Rotary ladder on side pull box of relay truck

Technical Field

The utility model belongs to the technical field of the technique of relaying car and specifically relates to a revolving ladder on relaying car side-pull case is related to.

Background

The rebroadcasting vehicle is a vehicle with television rebroadcasting equipment. For live broadcasting. It has the functions of video recording and editing. The signal is transmitted to a television station by microwave equipment for playing. The TV relay vehicle is a small-sized vehicle-mounted TV station with the characteristics of flexible maneuvering and large range of motion. It can be far from TV center to carry out on-site video recording and on-site editing work, and can immediately transmit the recorded program to TV center to carry out on-site rebroadcasting. In the similar rebroadcasting vehicles produced by various manufacturers in China, in order to fully utilize the space, the platform is usually made into a drawing type, and the platform is drawn out from the inside of the vehicle when in use and is retracted into a carriage when not in use.

The chinese utility model patent with the publication number CN201989717U discloses a turning ladder for a television relay van, which comprises a pedal turning ladder, a ladder placing device and a ladder collecting device; the pedal turning ladder is pivotally connected with a carriage of the television relay van, one end of the ladder placing device and one end of the ladder collecting device are respectively and pivotally arranged on the carriage, and the other end of the ladder placing device and the other end of the ladder collecting device are respectively and pivotally arranged on two sides of the pedal turning ladder.

The above prior art solutions have the following drawbacks: although the problem of installation space of the turnover ladder is solved, the turnover ladder is folded on the side wall of the carriage, so that the appearance of the carriage is influenced, the turnover ladder is easy to rust and damage due to the influence of external factors, and the service life of the turnover ladder is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a revolving ladder on relaying car side draw-box, it has can be with rolling over the advantage of rolling over a ladder and putting in the carriage.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a revolving ladder on rebroadcasting car side-draw case, including the carriage, set up the recess with outside intercommunication on the lateral wall in carriage, set up the breach with carriage inside and pull mouth intercommunication on the recess, it is connected with the pull board to slide in the recess, the pull groove has been seted up on the pull board, the pull inslot is provided with the carriage, equal rigid coupling has the slider on the both sides wall of carriage, the lateral wall that two sliders deviate from the carriage pastes with the lateral wall in pull groove respectively mutually, the top closure and the bottom lateral wall of slider paste with the top lateral wall and the bottom lateral wall in pull groove respectively, the slider slides with the pull groove and is connected, the rigid coupling has two to carry out spacing first dog to the slider in the pull groove, the upper surface of carriage is provided with the rotor plate, be provided with the subassembly that slides that supplies the rotor plate to slide on the carriage between rotor plate and the carriage, it has.

Through adopting above-mentioned technical scheme, when using, pull out the pull board from the recess, then pull out the carriage from the pull inslot, will pull out the rotor plate from the pull inslot through turning over a ladder, then turn over a ladder to the lower rotation, on the staff can go up the rotor plate through turning over a ladder, the people back gets into the carriage, when turning over a ladder and not using, can be with turning over a ladder upwards rotatory, will turn over behind the people and roll over a ladder and carriage and push into the pull inslot. The folding ladder can be better protected.

The utility model discloses further set up to: the sliding assembly comprises a sliding plate, the sliding plate is fixedly connected to the inner circumferential surface of the supporting frame, the sliding plate is arranged along the length direction of the supporting frame, a through groove is formed in the sliding plate, a rotary rod is fixedly connected to the rotary plate and penetrates through the through groove, the rotary rod is rotatably connected with the through groove, a nut is screwed on the rotary rod, and the supporting frame is located between the rotary plate and the nut.

Through adopting above-mentioned technical scheme, can be when leading to inslot gliding through the rotary rod, can be at logical inslot internal rotation again for turn over when rolling over the ladder and can accomodate into the drawer groove, can rotate suitable position again according to site environment, facilitate the use more.

The utility model discloses further set up to: the folding ladder comprises two first supporting rods and two second supporting rods, the two first supporting rods are parallel to each other, the two second supporting rods are parallel to each other, the plane where the two first supporting rods are located is parallel to the plane where the two second supporting rods are located, a first hinge groove and a second hinge groove are formed in the lower surface of the rotating plate, one ends of the two first supporting rods are hinged to the first hinge groove respectively, one ends of the two second supporting rods are hinged to the second hinge groove respectively, a plurality of pedals are arranged between the first supporting rods and the second supporting rods, the end face of one end of each pedal is hinged to the side walls of the two first supporting rods respectively, and the end face of the other end of each pedal is hinged to the side walls of the two second supporting rods respectively.

Through adopting above-mentioned technical scheme, when the staff stepped on the footboard, the pedal can be more stable safe, and the pedal can carry out the rotation of certain degree simultaneously and conveniently receive and put into the pull-out inslot.

The utility model discloses further set up to: the pull plate is hinged with a door plate which seals the pull groove, and the door plate is provided with a door lock which fixes the door plate.

Through adopting above-mentioned technical scheme, at the in-process that the relay truck walked, the door plant can seal the pull groove, prevents that the in-process that the relay truck walked from running out from the pull inslot and taking place danger in the highway section of jolting, prevents to support the frame.

The utility model discloses further set up to: the rotating plate is provided with a protection frame for protecting the safety of workers.

Through adopting above-mentioned technical scheme, when the staff was on the rotor plate, the bearer bar can protect the staff, avoids the staff to fall from the rotor plate carelessly as far as possible.

The utility model discloses further set up to: the holding tank has been seted up on the rotor plate, the bearer bar sets up in the holding tank, all articulated on two lateral walls of bearer bar one end have the sliding block of L shape, equal rigid coupling has uses in the sliding block cooperation on the both sides wall in the holding tank and prevents the second dog of the rectangle of bearer bar landing from holding the inslot, and the upper surface of bearer bar is provided with the fixed plate, wears to establish the bolt between the upper surface of fixed plate and rotor plate.

Through adopting above-mentioned technical scheme, when the protective frame used, pull out the protective frame from holding the inslot, then go up the rotation, when the fixed plate was set up at the upper surface of rotor plate, wear to establish the bolt between the upper surface of fixed plate and rotor plate, when the protective frame did not use, can put the holding tank with the protective frame in, make things convenient for putting and installing of protective frame.

The utility model discloses further set up to: the upper surface of the protective frame is provided with a fixing groove, and the fixing plates are hinged to two side walls in the fixing groove.

Through adopting above-mentioned technical scheme, when the bearer bar need be put up, rotate the fixed plate to the fixed slot in, avoid fixed plate occupation space to the thickness that can make the holding tank can be as little as possible, and then makes the thickness of rotating plate needn't be too thick.

The utility model discloses further set up to: the ladder groove has been seted up to the last border of holding tank, and it has the dead lever to articulate on the bottom surface in ladder groove.

Through adopting above-mentioned technical scheme, when the bearer bar was located the holding tank, the dead lever can be in vertical state under the action of gravity, and the dead lever at this moment can block the bearer bar, prevents that the bearer bar from stretching out from holding the inslot, causes the condition that the rotor plate can't be followed the pull inslot and pulled out.

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

1. through set up the pull groove on the pull board, set up the carriage in the pull groove, set up the rotor plate on the carriage, set up the subassembly that slides between rotor plate and the carriage, articulated folding ladder that turns over on the rotor plate, when using, pull out the pull board from the recess, then pull out the carriage from the pull inslot, will pull out the rotor plate from the pull inslot through turning over folding ladder, then turn over folding ladder to the lower rotation, the staff can be through turning over on folding ladder to the rotor plate, the people is getting into the carriage after, when turning over a ladder and not using, can be with turning over a ladder upwards rotatory, the people back will turn over folding ladder and carriage and push into the pull inslot. The folding ladder can be better protected;

2. the sliding assembly is arranged to be the sliding plate, the through groove is formed in the sliding plate, the rotating rod is arranged on the rotating plate and penetrates through the through groove, the rotating rod can slide in the through groove and rotate in the through groove at the same time, so that the folding ladder can be stored into the drawing groove and can rotate to a proper position according to the field environment, and the use is more convenient;

3. through seting up the holding tank on the rotor plate, set up the bearer bar in the holding tank, the both sides of bearer bar set up the sliding block of L shape, set up the second dog in the holding tank, set up the fixed slot on the bearer bar, and the bolt is worn to establish between the upper surface of fixed plate and rotor plate to articulated fixed plate in the fixed slot, and when the staff was on the rotor plate, the bearer bar can protect the staff, avoids the staff to fall from the rotor plate carelessly as far as possible. Meanwhile, when the protective frame is not used, the protective frame can be stored in the containing groove, so that the protective frame is convenient to store. When the protective frame needs to be put away, the fixed plate is rotated into the fixed groove, so that the occupied space of the fixed plate is avoided, the thickness of the accommodating groove can be reduced as much as possible, and the thickness of the rotating plate is not too thick.

Drawings

Fig. 1 is a schematic structural view of a rotary ladder in the present embodiment in a use state;

fig. 2 is a schematic structural diagram of a relay truck in the embodiment;

fig. 3 is a schematic structural view of the pull plate and the folding ladder in the embodiment;

FIG. 4 is an enlarged partial schematic view of portion A of FIG. 3;

FIG. 5 is a schematic structural diagram of a support frame in the present embodiment;

FIG. 6 is a schematic structural view of the supporting frame, the rotating plate and the folding ladder of the present embodiment;

FIG. 7 is an enlarged partial schematic view of portion B of FIG. 6;

FIG. 8 is a schematic view of the connection structure of the rotation plate and the supporting frame;

fig. 9 is a schematic structural view of the protective frame in the present embodiment.

In the figure, 1, a vehicle compartment; 11. drawing the opening; 12. a groove; 121. a notch; 2. a drawing plate; 21. drawing the groove; 211. a first stopper; 22. a first closing plate; 221. a door lock; 3. a U-shaped plate; 31. a transverse plate; 32. a vertical plate; 33. a flat plate; 331. a doorway; 332. a door panel; 4. a support frame; 41. a slider; 42. a rotation port; 5. a rotating plate; 51. accommodating grooves; 511. a second stopper; 512. a stepped groove; 5121. fixing the rod; 53. a first hinge slot; 54. a second hinge groove; 6. a slipping component; 61. a slide plate; 611. a through groove; 62. rotating the rod; 7. a protective frame; 71. a sliding block; 72. fixing grooves; 721. a fixing plate; 8. turning and folding the ladder; 81. a first support bar; 82. a second support bar; 83. and (5) treading the pedal.

Detailed Description

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

As fig. 1, fig. 2 shows, for the utility model discloses a rotary ladder on relay truck side-pull box, carriage 1 including the rectangle, set up the pull mouth 11 of rectangle on carriage 1's the lateral wall, pull mouth 11 and 1 outside intercommunication in carriage, set up the recess 12 of rectangle on carriage 1's the lateral wall, recess 12 is located the below of pull mouth 11, recess 12 is laid along carriage 1's width direction, and the width of recess 12 is wider than the width of pull mouth 11, recess 12 and outside intercommunication, recess 12 internal slipping is connected with pull board 2, the rigid coupling has the U-shaped plate 3 of inversion on pull board 2, the both ends rigid coupling of U-shaped plate 3 is at the upper surface of pull board 2, U-shaped plate 3 includes diaphragm 31 and two risers 32, the length direction setting of pull board 2 is followed to the width direction of riser 32. The top of the groove 12 is provided with a rectangular notch 121, the notch 121 enables the groove 12 to be communicated with the interior of the carriage 1 and the drawing opening 11, the length of the notch 121 is the same as the width of the vertical plate 32, and the width of the notch 121 is the same as the width of the drawing opening 11. The U-shaped plate 3 inserts in the pull mouth 11 along breach 121 to the U-shaped plate 3 can slide in pull mouth 11 and breach 121, and the one side rigid coupling that the U-shaped plate 3 deviates from carriage 1 has dull and stereotyped 33, and dull and stereotyped 33 is perpendicular with riser 32, has seted up gate 331 on the dull and stereotyped 33, and the border of gate 331 articulates there is door plant 332.

As shown in fig. 3 and 4, a rectangular drawing groove 21 is formed in an end surface of the drawing plate 2 located outside the vehicle compartment 1. The drawing groove 21 is arranged along the length direction of the drawing plate 2, a rectangular support frame 4 is arranged in the drawing groove 21, and the support frame 4 is arranged along the length direction of the drawing groove 21.

As shown in fig. 4 and 5, rectangular sliders 41 are fixedly connected to two side walls of the supporting frame 4, the sliders 41 are arranged along the length direction of the supporting frame 4, the side walls of the supporting frame 4, which are deviated from the two sliders 41, are respectively attached to the side walls of two sides of the drawing groove 21, the top side wall and the bottom side wall of the slider 41 are respectively attached to the top side wall and the bottom side wall of the drawing groove 21, the sliders 41 are slidably connected to the drawing groove 21, and first stoppers 211 for limiting the sliders 41 to slide out of the drawing groove 21 are fixedly connected to two sides of the end of the drawing groove 21.

As shown in fig. 6, the upper surface of the supporting frame 4 at one end outside the vehicle compartment 1 is provided with a rectangular rotating plate 5, the width of the rotating plate 5 is the same as that of the supporting frame 4, and the rotating plate 5 is parallel to the supporting frame 4. A sliding assembly 6 is arranged between the rotating plate 5 and the supporting frame 4, and the rotating plate 5 can slide along the length direction of the supporting frame 4 through the sliding assembly 6.

As shown in fig. 6 and 8, the sliding assembly 6 includes a rectangular sliding plate 61, the sliding plate 61 is fixedly connected to the inner circumferential surface of the supporting frame 4, the sliding plate 61 is arranged along the length direction of the supporting frame 4, a rectangular through groove 611 is formed in the sliding plate 61, the through groove 611 is formed along the length direction of the sliding plate 61, a cylindrical rotating rod 62 is fixedly connected to the lower surface of the rotating plate 5, the rotating rod 62 is perpendicular to the rotating plate 5, the bottom end of the rotating rod 62 passes through the through groove 611, an external thread is formed at the bottom end of the rotating rod 62, and a nut is screwed on the rotating rod 62 after the rotating rod 62 passes through the through groove 611.

As shown in fig. 6 and 8, a folding ladder 8 is hinged on a plate of a rotating plate 5, the folding ladder 8 includes two first support rods 81 and two second support rods 82, the two first support rods 81 are parallel to each other, the two second support rods 82 are parallel to each other, a plane where the two first support rods 81 are located is parallel to a plane where the two second support rods 82 are located, a first hinge groove 53 and a second hinge groove 54 are respectively formed in lower surfaces of two ends of the rotating plate 5 along a length direction of a support frame 4, the first hinge groove 53 and the second hinge groove 54 are both formed along a width direction of the support frame 4, one end of each of the two first support rods 81 is hinged in the first hinge groove 53, one end of each of the two second support rods 82 is hinged in the second hinge groove 54, a plurality of rectangular pedals 83 are arranged between the two first support rods 81 and the two second support rods 82, an end surface of one end of each pedal 83 is hinged to a side wall of the two first support rods 81, the end face of the other end of the pedal 83 is hinged to the side walls of the two second support rods 82, and the plurality of pedals 83 are uniformly distributed along the length directions of the first support rod 81 and the second support rods 82. The support frame 4 is provided with a rotation opening 42 for facilitating the rotation of the first support rod 81.

After the drawing plate 2 is drawn out from the carriage 1, the supporting frame 4 is drawn out from the drawing groove 21, after the supporting frame 4 is drawn out from the drawing groove 21, the first supporting rod 81 and the second supporting rod 82 are drawn, the rotating plate 5 slides to the end part of the supporting frame 4, which is positioned outside the carriage 1, along the sliding plate 61, the rotating plate 5 is rotated, the first supporting rod 81 is rotated to a position, which is parallel to the vehicle body, from a position perpendicular to the carriage 1, then the first supporting rod 81 and the second supporting rod 82 are rotated downwards, one end, which is far away from the rotating plate 5, of the first supporting rod 81 and the second supporting rod 82 is abutted against the ground, after the first supporting rod 81 and the second supporting rod 82 are abutted against the ground, at the moment, a worker can step on the rotating plate 5 by stepping on the pedal and then open the door panel 332 to enter the carriage 1.

As shown in fig. 6 and 7, in order to increase safety of workers on the rotating plate 5, a rectangular accommodating groove 51 is formed in an end surface of the rotating plate 5 facing away from the car 1. A rectangular protective frame 7 is provided in the housing groove 51.

As shown in fig. 7 and 9, two side walls of one end of the protection frame 7 are hinged with rectangular sliding blocks 71, the side walls of the two sliding blocks 71 departing from the protection frame 7 are attached to the side walls of the accommodating groove 51, the sliding blocks 71 are connected with the accommodating groove 51 in a sliding manner, the sliding blocks 71 are L-shaped, two sides of the end portion of the accommodating groove 51 are provided with second stoppers 511 for preventing the sliding blocks 71 from sliding out of the accommodating groove 51, and when the first stoppers 211 are in contact with the sliding blocks 71, the second stoppers 511 are matched with the sliding blocks 41 to prevent the sliding blocks 71 from sliding out of the accommodating groove 51.

Two fixing grooves 72 are formed in the upper surface of the protection frame 7, fixing plates 73 are hinged to two side walls in the fixing grooves 72, the fixing plates 73 are parallel to the protection frame 7, the protection frame 7 is rotated upward after being pulled out of the accommodating groove 51, the fixing plates 73 are rotated to enable the fixing plates 73 to be attached to the upper surface of the rotating plate 5 after the upper surface of the protection frame 7 is attached to the side walls of the rotating plate 5, and then bolts are inserted between the fixing plates 73 and the upper surface of the rotating plate 5.

As shown in fig. 3, the relay truck may shake during traveling, and in order to avoid danger in supporting the frame 4 and extending from the drawing groove 21, the lower edge of the end surface of the drawing plate 2 is hinged with a first closing plate 22 for closing the drawing groove 21. A door lock for fixing the first closing plate 22 is arranged between the first closing plate 22 and the end face of the pull plate 2.

The relay truck can rock when walking, the rotating plate 5 is located in the accommodating groove 51, the protective frame 7 can run out of the accommodating groove 51 due to the rocking of the relay truck, after the protective frame 7 runs out of the accommodating groove 51, the protective frame 7 cannot be pulled out of the pull-out groove 21 due to the existence of the first stop block 211, in order to avoid the situation that the protective frame 7 runs out of the accommodating groove 51 when the relay truck walks, the stepped groove 512 is formed in the top edge of the accommodating groove 51, the fixing rod 5121 is hinged to the bottom surface of the stepped groove 512, the fixing rod 5121 is parallel to the bottom surface of the stepped groove 512, the fixing rod 5121 can be in a vertical state under the action of gravity, and at the moment, the fixing rod 5121 can shield the protective frame 7 accommodated in the accommodating groove 51.

The implementation principle of the embodiment is as follows: when the relay truck travels to a destination, the pull plate 2 is pulled out from the groove 12, after the pull plate 2 is pulled out from the carriage 1, after the support frame 4 is pulled out from the pull-out groove 21 and the support frame 4 is pulled out from the pull-out groove 21, the first support rod 81 and the second support rod 82 are pulled to slide the rotating plate 5 to the end part of the support frame 4 positioned outside the carriage 1 along the sliding plate 61, the rotating plate 5 is rotated, so that the first support rod 81 is rotated from a position perpendicular to the vehicle compartment 1 to a position parallel to the vehicle compartment 1, then the first supporting rod 81 and the second supporting rod 82 are rotated downwards, so that one ends of the first supporting rod 81 and the second supporting rod 82 far away from the rotating plate 5 are abutted against the ground, after the first supporting rod 81 and the second supporting rod 82 are in contact with the ground, the operator can step on the pedal 83 to the rotating plate 5 and then open the door panel 332 to enter the compartment 1.

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 (8)

1. The utility model provides a rotary ladder on rebroadcasting car side-pulling box, includes carriage (1), offers recess (12) with outside intercommunication on the lateral wall of carriage (1), offers on recess (12) with carriage (1) inside and pull breach (121) of mouthful (11) intercommunication, recess (12) internal slipping is connected with pull board (2), its characterized in that: the drawing groove (21) is formed in the drawing plate (2), the supporting frame (4) is arranged in the drawing groove (21), sliding blocks (41) are fixedly connected to two side walls of the supporting frame (4), the side walls of the two sliding blocks (41) departing from the supporting frame (4) are attached to the side walls of the drawing groove (21), the top of each sliding block (41) is closed, the side walls of the bottom of each sliding block (41) are attached to the side walls of the top and the bottom of the drawing groove (21), the sliding blocks (41) are connected with the drawing groove (21) in a sliding mode, two first limit stops (211) limiting the sliding blocks (41) are fixedly connected to the sliding blocks (41) in the drawing groove (21), a rotating plate (5) is arranged on the upper surface of the supporting frame (4), a sliding assembly (6) for the rotating plate (5) to slide on the supporting frame (4) is arranged between the rotating plate (5) and the supporting frame (4), and a turning.

2. The rotary ladder on the side draw box of the relay truck as claimed in claim 1, wherein: slip subassembly (6) including slip board (61), slip board (61) rigid coupling is on the inner peripheral surface of carriage (4), and the length direction of slip board (61) along carriage (4) lays, has seted up logical groove (611) on slip board (61), the rigid coupling has rotary rod (62) on rotor plate (5), and through groove (611) are passed in rotary rod (62), and rotary rod (62) rotate with logical groove (611) and are connected, and the nut has been twisted on rotary rod (62), and carriage (4) are located between rotor plate (5) and the nut.

3. The rotary ladder on the side draw box of the relay truck as claimed in claim 1, wherein: the folding ladder (8) comprises two first supporting rods (81) and two second supporting rods (82), the two first supporting rods (81) are parallel to each other, the two second supporting rods (82) are parallel to each other, the plane where the two first supporting rods (81) are located is parallel to the plane where the two second supporting rods (82) are located, a first hinging groove (53) and a second hinging groove (54) are formed in the lower surface of the rotating plate (5), one end of each first supporting rod (81) is hinged in the first hinging groove (53) respectively, one end of each second supporting rod (82) is hinged in the second hinging groove (54) respectively, a plurality of treading plates (83) are arranged between the first supporting rods (81) and the second supporting rods (82), the end face of one end of each treading plate (83) is hinged to the side walls of the two first supporting rods (81) respectively, and the end face of the other end of each treading plate (83) is hinged to the side walls of the two second supporting rods (82) respectively.

4. The rotary ladder on the side draw box of the relay truck as claimed in claim 1, wherein: the drawing plate (2) is hinged with a door plate (332) for sealing the drawing groove (21), and the door plate (332) is provided with a door lock (221) for fixing the door plate (332).

5. The rotary ladder on the side draw box of the relay truck as claimed in claim 1, wherein: the rotating plate (5) is provided with a protective frame (7) for protecting the safety of workers.

6. The rotary ladder on the side draw box of the relay truck as claimed in claim 5, wherein: holding tank (51) have been seted up on rotor plate (5), bearer bar (7) set up in holding tank (51), all articulated on two lateral walls of bearer bar (7) one end have sliding block (71) of L shape, equal rigid coupling has second dog (511) of the rectangle that uses in sliding block (71) cooperation and prevents bearer bar (7) landing from holding tank (51) on the both sides wall in holding tank (51), and the upper surface of bearer bar (7) is provided with fixed plate (721), wears to establish the bolt between the upper surface of fixed plate (721) and rotor plate (5).

7. The rotary ladder on the side draw box of the relay truck as claimed in claim 6, wherein: the upper surface of the protective frame (7) is provided with a fixing groove (72), and the fixing plate (721) is hinged to two side walls in the fixing groove (72).

8. The rotary ladder on the side draw box of the relay truck as claimed in claim 7, wherein: stepped grooves (512) are formed in the upper edges of the accommodating grooves (51), and fixing rods (5121) are hinged to the bottom surfaces of the stepped grooves (512).

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