阅读说明：本技术 一种预制楼板自适应调节运输平台 (Prefabricated floor self-adaptation regulation transportation platform ) 是由 焦安亮 王永好 黄延铮 陈璐 张中善 程晟钊 李佳男 曾凤娟 陈静 于 2021-08-09 设计创作，主要内容包括：本发明提出了一种预制楼板自适应调节运输平台,涉及运输平台技术领域,包括底架和两个导架,导架设置有支撑架,支撑架上设置有第一驱动装置,两个支撑架上架设有底板,底板上安装有承载板,承载板上开设有滑槽,滑槽滑动连接有两个夹板,两个夹板关于承载板的中心对称,承载板的中心设置有第一驱动电机,两个夹板通过曲柄和连杆与第一驱动电机连接,形成曲柄滑块机构,承载板和底板之间设置有第二驱动装置,承载板和底板上标有平行于滑槽延伸方向的中心线和垂直于滑槽延伸方向的中心线,承载板和底板上垂直于滑槽延伸方向的中心线对齐,解决现有技术中提升平台不具备调整功能,需通过吊装设备调整预制楼板的位置导致调整不便且调整精度差的问题。(The invention provides a prefabricated floor self-adaptive adjustment transportation platform, which relates to the technical field of transportation platforms and comprises a bottom frame and two guide frames, wherein the guide frames are provided with support frames, a first driving device is arranged on each support frame, a bottom plate is arranged on each support frame, a bearing plate is arranged on each bottom plate, a sliding groove is formed in each bearing plate, each sliding groove is connected with two clamping plates in a sliding mode, the two clamping plates are symmetrical relative to the center of each bearing plate, a first driving motor is arranged in the center of each bearing plate, the two clamping plates are connected with the first driving motor through a crank and a connecting rod to form a crank-slider mechanism, a second driving device is arranged between each bearing plate and the bottom plate, a central line parallel to the extending direction of the sliding groove and a central line perpendicular to the extending direction of the sliding groove are marked on each bearing plate and the bottom plate, the central lines perpendicular to the extending direction of the sliding groove on each bearing plate and the bottom plate are aligned, and the problem that a lifting platform in the prior art does not have an adjustment function is solved, the position that needs to pass through hoisting equipment adjustment precast floor slab leads to the inconvenient and poor problem of adjustment precision of adjustment.)

1. A self-adaptive adjusting and transporting platform for a prefabricated floor slab is characterized by comprising a bottom frame and two guide frames arranged on the bottom frame oppositely, wherein the guide frames are built by a steel structure, one sides of the two guide frames close to each other are respectively provided with a support frame, the support frame is provided with a first driving device for driving the support frame to move along the guide frames, a bottom plate is erected on the two support frames, and a bearing plate is arranged on the bottom plate,

the upper end surface of the bearing plate is provided with a sliding groove parallel to one side edge of the bearing plate, the sliding groove passes through the center of the bearing plate, the sliding groove is connected with two clamping plates in a sliding way, the two clamping plates are symmetrical relative to the center of the bearing plate, the center of the bearing plate is provided with a first driving motor, the two clamping plates are connected with an output shaft of the first driving motor through cranks and connecting rods with the same size to form a crank-slider mechanism, the cranks of the two clamping plates are positioned on the same straight line, the bearing plate is internally provided with a movable groove for the cranks and the connecting rods to move, and the movable groove is communicated with the sliding groove,

a second driving device for driving the bearing plate to move along the direction perpendicular to the extending direction of the sliding groove is arranged between the bearing plate and the bottom plate, a central line parallel to the extending direction of the sliding groove and a central line perpendicular to the extending direction of the sliding groove are marked on the bearing plate and the bottom plate, and the central lines perpendicular to the extending direction of the sliding groove on the bearing plate and the bottom plate are overlapped up and down.

2. The self-adaptive precast floor slab adjusting and transporting platform of claim 1, wherein the second driving device comprises a second driving motor and a gear, the second driving motor is fixedly connected with the bottom plate, the gear is connected with an output shaft of the second driving motor, a rack engaged with the gear is arranged at the bottom of the bearing plate, the extending direction of the rack is perpendicular to the extending direction of the sliding chute, and a guiding structure is arranged between the bottom plate and the bearing plate.

3. The self-adaptive precast floor slab adjusting and transporting platform of claim 2, wherein the guide structure comprises support legs and rollers, the support legs are arranged at the bottom of the bearing plate, the rollers are rotatably connected with the support legs, a guide groove in the same direction as the extending direction of the rack is formed in the upper end face of the bottom plate, and the rollers are located in the guide groove.

4. The self-adaptive precast floor slab adjusting and transporting platform as claimed in claim 1 or 3, wherein the self-adaptive precast floor slab adjusting and transporting platform comprises a falling prevention device, the falling prevention device comprises two support rods symmetrically arranged on the bottom plate, a sleeve is fixedly connected to a position of the bottom plate close to the guide frame, the support rods are slidably connected with the sleeve, a stop ring extends outwards from a rod body of the support rod, the stop ring is arranged on a side of the two sleeves which are away from each other, a first spring is arranged between the stop ring and the sleeve, and the first spring is sleeved on the support rods,

a third driving motor is fixedly connected with the center of the bottom plate, the output end of the third driving motor is connected with a winding drum, one ends of the two support rods, which are close to each other, are connected with the winding drum through pull ropes,

and a speed sensor and a controller are arranged on the bottom plate, the speed sensor is in signal connection with the controller, and the controller is electrically connected with the third driving motor.

5. The precast floor slab adaptive adjustment transportation platform of claim 4, the winding drum is provided with a mounting hole along the central axis thereof, the output shaft of the third driving motor is connected with the mounting hole, a first slot is arranged on the wall of the mounting hole, a clamping block is connected in the first slot in a sliding way, a second spring is arranged between the clamping block and the first slot, a second slot matched with the first slot is arranged on an output shaft of the third driving motor, an electromagnet is arranged in the winding drum, the controller is in signal connection with the electromagnet, when the electromagnet is electrified, the clamping block is adsorbed to extrude the second spring to retract into the first slot, when the electromagnet is powered off, the clamping block is clamped in the first slot and the second slot under the elastic force of the second spring.

6. The self-adaptive precast floor slab adjusting and transporting platform according to claim 5, wherein a first guide wheel is arranged between the supporting rod and the winding drum, the first guide wheel is connected with the bottom plate through a connecting rod, the pull rope is connected with the supporting rod through the top of the first guide wheel, and the connecting point of the pull rope and the supporting rod is located on the same horizontal line with the top end point of the first guide wheel.

7. The self-adaptive precast floor slab adjusting and transporting platform according to claim 6, wherein a second guide wheel is arranged between the first guide wheel and the winding drum, the second guide wheel is connected with the bottom plate through a connecting rod, the pull rope is connected with the winding drum through the bottom of the second guide wheel, and the connecting point of the pull rope and the winding drum is located on the same horizontal line with the bottom end point of the second guide wheel.

8. The self-adaptive precast floor slab adjusting and transporting platform according to claim 7, wherein a connecting plate is arranged at one end of each of the two support rods close to each other, clamping grooves are formed in portions of the connecting plate located at two sides of each support rod, rope loops are arranged in the clamping grooves, and the pull rope is connected with the two rope loops.

Technical Field

The invention belongs to the technical field of transportation platforms, and particularly provides a self-adaptive adjustment transportation platform for a prefabricated floor slab.

Background

In the construction of a high-rise fabricated building, the prefabricated floor slab is required to be transported to a designated floor for hoisting and assembling, a vertical hoisting platform is generally adopted for transporting the prefabricated floor slab to the high rise at present, the prefabricated floor slab is placed on the hoisting platform, and after the prefabricated floor slab is transported to the designated floor, the hoisting device hoists and assembles the prefabricated floor slab; moreover, if the prefabricated floor slab is placed to incline, the stress of the lifting platform is unbalanced, the moment applied to the lifting platform is increased, accelerating equipment is damaged, and even accidents occur.

Therefore, when placing the precast floor slab on the lifting platform at present, the position of the precast floor slab usually needs to be carefully and repeatedly adjusted through hoisting equipment, so that the adjustment is not only time-consuming and labor-consuming, but also has poor adjustment precision.

Accordingly, there is a need in the art for a precast floor adaptive adjustment transport platform that addresses the above-mentioned problems.

Disclosure of Invention

The invention provides a self-adaptive adjusting and transporting platform for a prefabricated floor slab, which solves the problems that a lifting platform in the prior art does not have an adjusting function, the position of the prefabricated floor slab needs to be adjusted through hoisting equipment, the adjusting process is time-consuming, labor-consuming, inconvenient and poor in adjusting precision.

The technical scheme of the invention is realized as follows: a prefabricated floor self-adaptive adjustment transportation platform comprises a bottom frame and two guide frames arranged on the bottom frame oppositely, wherein the guide frames are constructed by a steel structure, one sides of the two guide frames close to each other are respectively provided with a support frame, the support frames are provided with a first driving device for driving the support frames to move along the guide frames, a bottom plate is erected on the two support frames, a bearing plate is arranged on the bottom plate, the upper end surface of the bearing plate is provided with a chute parallel to one side edge of the bearing plate, the chute passes through the center of the bearing plate, the chute is connected with two clamping plates in a sliding manner, the two clamping plates are symmetrical relative to the center of the bearing plate, the center of the bearing plate is provided with a first driving motor, the two clamping plates are connected with an output shaft of the first driving motor through cranks and connecting rods with the same size, and a crank slider mechanism is formed, the two cranks of the clamping plate are positioned on the same straight line, a movable groove for the crank and the connecting rod to move is formed in the bearing plate, the movable groove is communicated with the sliding groove, a second driving device for driving the bearing plate to move in the extending direction perpendicular to the sliding groove is arranged between the bearing plate and the bottom plate, the center line parallel to the extending direction of the sliding groove and the center line perpendicular to the extending direction of the sliding groove are marked on the bearing plate and the bottom plate, and the center line perpendicular to the extending direction of the sliding groove is overlapped up and down on the bearing plate and the bottom plate.

The technical effect of the scheme is as follows: after the prefabricated floor slab is placed on the bearing plate, the first driving motor is started to drive the crank and the connecting rod to drive the two clamping plates to move towards the direction close to each other, the prefabricated floor slab is pushed and positioned, the two clamping plates are connected with the first driving motor through the same slider-crank mechanism, after the clamping plates clamp and position the prefabricated floor slab, the central line of the prefabricated floor slab, which is vertical to the extending direction of the sliding chute, is automatically aligned with the central line of the bearing plate, which is vertical to the extending direction of the sliding chute, namely the central line of the prefabricated floor slab is aligned with the central line of the bottom plate, the bearing plate is driven to move on the bottom plate along the direction vertical to the extending direction of the sliding chute by the second driving device, the central line of the prefabricated floor slab, which is parallel to the extending direction of the sliding chute, is aligned with the central line of the bottom plate, compared with the situation that the position of the prefabricated floor slab is adjusted by hoisting equipment in the background technology, not only adjustment process convenient and fast, the accuracy is higher moreover, has guaranteed transporting platform and floor top hoist device's smooth cooperation.

In the preferable technical scheme of the self-adaptive adjusting and transporting platform for the precast floor slab, the second driving device comprises a second driving motor and a gear, the second driving motor is fixedly connected with the bottom plate, the gear is connected with an output shaft of the second driving motor, a rack meshed with the gear is arranged at the bottom of the bearing plate, the extending direction of the rack is perpendicular to the extending direction of the sliding groove, and a guide structure is arranged between the bottom plate and the bearing plate.

The technical effect of the scheme is as follows: the gear is driven to rotate by the second driving motor, and the gear drives the bearing plate to move on the bottom plate through the rack, so that the position of the bearing plate is adjusted.

In the preferable technical scheme of the self-adaptive adjusting and transporting platform for the precast floor slab, the guide structure comprises supporting legs and rollers, the supporting legs are arranged at the bottom of the bearing plate, the rollers are rotatably connected with the supporting legs, guide grooves which are the same as the extending directions of the racks are formed in the upper end face of the bottom plate, and the rollers are located in the guide grooves.

The technical effect of the scheme is as follows: through setting up the landing leg, for second driving motor and gear provide installation space, reduce the area of contact between loading board and the bottom plate simultaneously, with the gyro wheel combined action for frictional force between loading board and the bottom plate is less, makes things convenient for the relative bottom plate activity of loading board, and the setting up of guide way guarantees that the loading board can not take place the skew when moving along perpendicular to spout extending direction, avoids influencing the central line of adjusting well.

In the above preferred technical solution of the transportation platform for self-adaptive adjustment of precast floor slab, the transportation platform for self-adaptive adjustment of precast floor slab includes a falling prevention device, the falling prevention device includes two support rods symmetrically disposed on the bottom plate, the bottom of the bottom plate is close to the fixedly positioned sleeves of the guide frame, the support rods are slidably connected with the sleeves, the rod bodies of the support rods extend outwards to form stop rings, the stop rings are disposed on one sides of the two sleeves departing from each other, a first spring is disposed between the stop rings and the sleeves, the first spring is sleeved on the support rods, a third driving motor is fixedly connected to the center of the bottom plate, the output end of the third driving motor is connected with a winding drum, one ends of the two support rods close to each other are connected with the winding drum through a pull rope, and the bottom plate is provided with a speed sensor and a controller, the speed sensor is in signal connection with the controller, and the controller is electrically connected with the third driving motor.

The technical effect of the scheme is as follows: under normal conditions, the third driving motor drives the winding drum to rotate, the two support rods move towards the direction close to each other through the pull rope, the stop ring extrudes the first spring, and the end parts of the support rods retract to the bottom of the bottom plate; when the speed sensor monitors that the speed of the bottom plate exceeds a set value, a signal is transmitted to the controller, the controller controls the third driving motor to rotate reversely, so that the pull rope on the winding drum is opened, the supporting rods move towards directions away from each other under the action of the elastic force of the first spring, and the edge of the supporting rods extending out of the bottom plate is clamped on the guide frame, so that the emergency braking of the transportation platform is realized, and the irrecoverable accidents are avoided.

In the preferred technical scheme of the self-adaptive prefabricated floor slab adjusting and transporting platform, a mounting hole is formed in the winding drum along the central axis of the winding drum, an output shaft of a third driving motor is connected with the mounting hole, a first slot is formed in the hole wall of the mounting hole, a clamping block is connected in the first slot in a sliding mode, a second spring is arranged between the clamping block and the first slot, a second slot matched with the first slot is formed in the output shaft of the third driving motor, an electromagnet is arranged in the winding drum, the clamping block is adsorbed to extrude the second spring to retract into the first slot when the electromagnet is powered on, and the clamping block is clamped in the first slot and the second slot under the elastic force of the second spring when the electromagnet is powered off.

The technical effect of the scheme is as follows: under normal conditions, the electromagnet is powered off, the clamping blocks are clamped in the first slot and the second slot, and an output shaft of the third driving motor is connected with the winding drum; the speed that detects the bottom plate at speedtransmitter gives the controller with signal transmission when exceeding the setting value, the circular telegram of controller control electro-magnet, the electro-magnet adsorbs the fixture block and gets into in the first slot, make a winding section of thick bamboo lose with third driving motor's being connected, the bracing piece is in the elasticity of first spring down to the direction activity of leaving each other, the pulling stay cord is opened from a winding section of thick bamboo, make the bracing piece pop out the edge card of bottom plate rapidly and locate on the guide bracket, anti-falling device's reaction rate is improved, further guarantee transport platform's safety.

In the preferable technical scheme of the self-adaptive adjusting and transporting platform for the precast floor slab, a first guide wheel is arranged between the supporting rod and the winding drum, the first guide wheel is connected with the bottom plate through a connecting rod, the pull rope passes through the top of the first guide wheel and is connected with the supporting rod, and the connecting point of the pull rope and the supporting rod is located on the same horizontal line with the top end point of the first guide wheel.

The technical effect of the scheme is as follows: because the mounting dimension of third driving motor and a winding section of thick bamboo is great, the distance of bottom apart from the bottom plate of a winding section of thick bamboo can be greater than the distance of bracing piece apart from the bottom plate, and the stay cord can be the slope form like this, leads to the stay cord to have certain angle to the pulling force of bracing piece and the slip direction of bracing piece, and the dispersion pulling force reduces the pulling effect, through setting up first leading wheel for the stay cord is unanimous with the slip direction assurance of bracing piece, makes the action rapidly to the bracing piece.

In the preferable technical scheme of the self-adaptive adjusting and transporting platform for the precast floor slab, a second guide wheel is arranged between the first guide wheel and the winding drum, the second guide wheel is connected with the bottom plate through a connecting rod, the pull rope passes through the bottom of the second guide wheel and is connected with the winding drum, and the connecting point of the pull rope and the winding drum and the bottom end point of the second guide wheel are located on the same horizontal line.

The technical effect of the scheme is as follows: through setting up the second leading wheel for the tie point of stay cord and winding section of thick bamboo is located same water flat line, makes things convenient for the winding of winding section of thick bamboo to the stay cord, and the stay cord is opened a book from the quick of winding section of thick bamboo, guarantees that anti-falling device can be rapidly and the operation smoothly.

In the preferable technical scheme of the self-adaptive adjusting and transporting platform for the precast floor slab, one ends, close to each other, of the two support rods are provided with connecting plates, clamping grooves are formed in portions, located on two sides of the support rods, of the connecting plates, rope loops are arranged in the clamping grooves, and the pull ropes are connected with the two rope loops.

The technical effect of the scheme is as follows: make things convenient for the stay cord to be connected with the bracing piece, the setting of draw-in groove also makes the difficult slippage from the connecting plate of becket simultaneously.

Drawings

FIG. 1 is a schematic overall structure diagram of a self-adaptive regulation transportation platform for precast floor slabs according to the present invention;

FIG. 2 is a top view of a bottom plate and a bearing plate of a precast floor slab adaptive adjustment transportation platform according to the present invention;

FIG. 3 is a schematic view of detail A of FIG. 1;

FIG. 4 is a schematic view of detail B of FIG. 1;

FIG. 5 is a bottom view of a bottom plate of a self-adaptive adjustment transportation platform for precast floor slabs according to the present invention;

fig. 6 is a sectional view of a winding drum of a prefabricated floor slab adaptive adjustment transportation platform according to the present invention.

List of reference numerals: 1. a chassis; 2. a guide frame; 3. a support frame; 4. a hoist; 5. a base plate; 51. a guide groove; 52. a sleeve; 53. a third drive motor; 54. a second slot; 55. a first guide wheel; 56. a second guide wheel; 6. a carrier plate; 61. a chute; 62. a splint; 63. a first drive motor; 64. a crank; 65. a connecting rod; 66. a movable groove; 67. a rack; 7. a second drive motor; 71. a gear; 72. a support leg; 73. a roller; 8. a support bar; 81. a stop ring; 82. a first spring; 83. a connecting plate; 84. a card slot; 85. a loop; 9. a winding drum; 91. a first slot; 92. a clamping block; 93. a second spring; 94. an electromagnet; 95. and pulling a rope.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention relates to a concrete embodiment of a self-adaptive adjusting and transporting platform for a precast floor slab, which comprises the following steps: as shown in fig. 1 and 2, a prefabricated floor self-adaptive control transportation platform, including chassis 1 and two guide frames 2 that set up on chassis 1 relatively along left and right directions, guide frame 2 is built by the steel construction and is formed, one side that two guide frames 2 are close to each other is provided with support frame 3 respectively, be provided with the first drive arrangement who drives support frame 3 and move about from top to bottom along guide frame 2 on the support frame 3, first drive arrangement includes lifting machine 4, lifting machine 4 is connected with support frame 3 through the lifting rope, two support frames 3 put up and are equipped with bottom plate 5, install loading board 6 on the bottom plate 5, mark the central line that extends along left and right directions and the central line that extends along fore-and-aft direction on bottom plate 5, and the central line that loading board 6 extends along fore-and-aft direction aligns with the central line that extends along fore-and-aft direction on the bottom plate 5.

Wherein, the spout 61 that extends along the left and right sides is seted up to the up end of loading board 6, and the central line that extends along the left and right sides on the loading board 6 is the central line of spout 61 equally also, and spout 61 sliding connection has two splint 62, and two splint 62 are about the central symmetry of loading board 6. A first driving motor 63 is arranged at the center of the bearing plate 6, the two clamping plates 62 are connected with an output shaft of the first driving motor 63 through cranks 64 and connecting rods 65 with the same size to form a crank-slider mechanism, the cranks 64 of the two clamping plates 62 are positioned on the same straight line, movable grooves 66 for the cranks 64 and the connecting rods 65 to move are formed in the bearing plate 6, and the movable grooves 66 are communicated with the sliding grooves 61. A second driving device for driving the bearing plate 6 to move along the front-back direction is arranged between the bearing plate 6 and the bottom plate 5.

After the prefabricated floor slab is placed on the bearing plate 6, the first driving motor 63 is started to drive the crank 64 and the connecting rod 65 to drive the two clamping plates 62 to move towards each other, the prefabricated floor slab is pushed and positioned, and as the two clamping plates 62 are connected with the first driving motor 63 through the same crank-slider mechanism, after the prefabricated floor slab is clamped and positioned by the clamping plates 62, the center line of the prefabricated floor slab extending along the front-rear direction is automatically aligned with the center line of the bearing plate 6 extending along the front-rear direction, and since the center line of the loading plate 6 extending in the front-rear direction is aligned with the center line of the bottom plate 5 extending in the front-rear direction, the center line of the precast floor slab extending in the front-rear direction is aligned with the center line of the floor panel 5, and at this time, the bearing plate 6 is driven to move on the bottom plate 5 along the front-back direction only by the second driving device, so that the center line of the prefabricated floor slab extending along the left-right direction is aligned with the center line of the bottom plate 5.

As shown in fig. 1, 3 and 4, the second driving device includes a second driving motor 7 and a gear 71, the second driving motor 7 is fixedly connected to the bottom plate 5, the gear 71 is connected to an output shaft of the second driving motor 7, a rack 67 engaged with the gear 71 is disposed at the bottom of the carrier plate 6, and the rack 67 extends in the front-rear direction. Be provided with guide structure between bottom plate 5 and the loading board 6, guide structure includes four landing legs 72 and sets up in the gyro wheel 73 of landing leg 72 tip, and landing leg 72 sets up in the bottom of loading board 6 along left right direction symmetry, and gyro wheel 73 rotates with landing leg 72 to be connected, and guide way 51 along fore-and-aft direction extension is seted up to bottom plate 5 up end, and gyro wheel 73 is located guide way 51.

Landing leg 72 provides installation space for second driving motor 7 and gear 71, reduce the area of contact between loading board 6 and the bottom plate 5 simultaneously, with gyro wheel 73 combined action, make the frictional force between loading board 6 and the bottom plate 5 less, thereby make things convenient for second driving motor 7 to rotate through drive gear 71 and drive rack 67 and the relative bottom plate 5 activity of loading board 6 and adjust, the setting up of guide way 51 guarantees that the skew can not take place when loading board 6 moves about along perpendicular to spout 61 extending direction, avoid influencing the central line that has adjusted well.

As shown in fig. 1 and 5, in order to avoid a safety accident caused by a rapid falling of the bottom plate 5 due to a failure of the first driving device, the self-adaptive regulation transportation platform for the prefabricated floor slab is further provided with a falling prevention device. The anti-falling device comprises two support rods 8 which are arranged on the bottom plate 5 in a bilateral symmetry mode, the bottom of the bottom plate 5 is close to the position fixedly connected with sleeves 52 of the guide frames 2 on the left side and the right side, the support rods 8 are connected with the sleeves 52 in a sliding mode, a stop ring 81 extends outwards from the rod body of the support rods 8, the stop ring 81 is located on one side, away from each other, of the two sleeves 52, a first spring 82 is arranged between the stop ring 81 and the sleeves 52, and the support rods 8 are sleeved with the first spring 82.

As shown in fig. 1 and 6, a third driving motor 53 is fixedly connected to the bottom center of the bottom plate 5, an output end of the third driving motor 53 is connected to a winding drum 9, an output shaft and the winding drum 9 are vertically arranged, a mounting hole is formed along a central axis of the winding drum 9, the output shaft of the third driving motor 53 is connected to the mounting hole, a first slot 91 is formed in a wall of the mounting hole, a latch 92 is slidably connected to the first slot 91, a second spring 93 is arranged between the latch 92 and the first slot 91, a second slot 54 adapted to the first slot 91 is formed in the output shaft of the third driving motor 53, an electromagnet 94 is arranged in the winding drum 9, and when the electromagnet 94 is energized, the adsorption latch 92 presses the second spring 93 to retract into the first slot 91, when the electromagnet 94 is powered off, the latch 92 is latched in the first slot 91 and the second slot 54 by the elastic force of the second spring 93. One ends of the two support rods 8 close to each other are connected with the winding drum 9 through pull ropes 95, a speed sensor and a controller are arranged on the bottom plate 5, the speed sensor and the electromagnet 94 are in signal connection with the controller, and the controller is electrically connected with the third driving motor 53.

Under normal conditions, the electromagnet 94 is powered off, the latch block 92 is clamped in the first slot 91 and the second slot 54, the output shaft of the third driving motor 53 is connected with the winding drum 9, the controller controls the third driving motor 53 to drive the winding drum 9 to rotate, the winding drum 9 winds the pull rope 95, the two support rods 8 move towards the direction close to each other through the pull rope 95, the stop ring 81 is enabled to extrude the first spring 82 until the end portions of the support rods 8 retract to the bottom of the bottom plate 5, the lifting of the bottom plate 5 is not affected, the third driving motor 53 is provided with a band-type brake device, when the end portions of the support rods 8 retract to the bottom of the bottom plate 5, the controller controls the third driving motor 53 to stop rotating, and the band-type brake device tightly grips the output shaft to keep the output shaft static, so that the winding drum 9 keeps tensioning on the pull rope 95; when the speed sensor monitors that the speed of the bottom plate 5 exceeds a set value, a signal is transmitted to the controller, the controller controls the electromagnet 94 to be electrified, the electromagnet 94 absorbs the fixture block 92 into the first slot 91, the winding drum 9 is not connected with the third driving motor 53, the support rods 8 move in the direction away from each other under the elastic force of the first spring 82, the pull ropes 95 are pulled to be opened from the winding drum 9, the support rods 8 are rapidly ejected out of the edge of the bottom plate 5 and clamped on the guide frame 2, the emergency braking of the transportation platform is realized, and the irreparable accident is avoided.

Continuing to refer to fig. 1 and 5, because third driving motor 53 and a winding section of thick bamboo 9 are along vertical setting, the mounting dimension is great, the bottom of a winding section of thick bamboo 9 can be greater than the distance of bracing piece 8 apart from bottom plate 5, stay cord 95 can be the slope form like this, lead to stay cord 95 to have certain angle to the pulling force of bracing piece 8 and the slip direction of bracing piece 8, the dispersion pulling force, reduce the pulling effect, therefore, be provided with first leading wheel 55 between bracing piece 8 and the winding section of thick bamboo 9, first leading wheel 55 is connected with bottom plate 5 through the connecting rod, stay cord 95 is connected with bracing piece 8 through the top of first leading wheel 55, the junction of stay cord 95 and bracing piece 8 is located same water flat line with the top endpoint of first leading wheel 55, make stay cord 95 and the slip direction of bracing piece 8 guarantee unanimously, make the bracing piece 8 can make the action.

For guaranteeing smooth winding and opening a book between stay cord 95 and the winding section of thick bamboo 9, be provided with second leading wheel 56 between first leading wheel 55 and the winding section of thick bamboo 9, second leading wheel 56 passes through the connecting rod and is connected with bottom plate 5, stay cord 95 is connected with the winding section of thick bamboo 9 through the bottom of second leading wheel 56, the tie point of stay cord 95 and winding section of thick bamboo 9 and the bottom extreme point of second leading wheel 56 are located same water flat line, make stay cord 95 be located same water flat line with the tie point of winding section of thick bamboo 9, make things convenient for the winding of winding section of thick bamboo 9 to stay cord 95, and stay cord 95 is opened a book from the quick on the winding section of thick bamboo 9, guarantee that anti-falling device can move rapidly and smoothly.

Continuing to refer to fig. 5, a connecting plate 83 is disposed at one end of each of the two support rods 8, a locking groove 84 is disposed at a portion of the connecting plate 83 located at two sides of the support rod 8, a loop 85 is disposed in the locking groove 84, and a pull rope 95 is connected to the two loops 85. The connection between the pulling rope 95 and the supporting rod 8 is facilitated, and meanwhile, the arrangement of the clamping groove 84 enables the rope loop 85 not to slip off from the connecting plate 83 easily.

In the above embodiments, the central line of the loading plate extending along the front-back direction is aligned with the central line of the bottom plate extending along the front-back direction, the sliding groove of the loading plate extends along the left-right direction, the second driving device drives the loading plate to move along the front-back direction, in other embodiments, the central line of the loading plate extending along the left-right direction is aligned with the central line of the bottom plate extending along the left-right direction, the sliding groove of the loading plate extends along the front-back direction, and the second driving device drives the loading plate to move along the left-right direction.

In the above embodiment, the landing leg sets up in the bottom of loading board, and the guide way has been seted up to the bottom plate up end, and in other embodiments, the landing leg sets up in the up end of bottom plate, and the guide way is seted up in the bottom of loading board, and the gyro wheel on the landing leg is located the guide way of loading board bottom.

In the above embodiments, the third driving motor and the winding drum are vertically disposed, in other embodiments, the third driving motor and the winding drum are disposed in the front-rear direction, and the first guide wheel and the second guide wheel are disposed according to the distance from the winding drum to the bottom plate.

In the above-mentioned embodiment, the winding cylinder is provided with the electro-magnet, when promptly falling, through the circular telegram of controller control electro-magnet, adsorb the fixture block between the output shaft of winding cylinder and third driving motor to the first slot in, make winding cylinder and third driving motor lose to be connected, realize opening a book of stay cord under the elasticity of first spring, popping out of bracing piece, in other embodiments, do not set up the electro-magnet in the winding cylinder, winding cylinder and third driving motor's output shaft fixed connection, when promptly falling appears, the direction that controller control third driving motor opened a book towards the winding cylinder rotates, under the elasticity of first spring, also enable the bracing piece and pop out.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.