CN117108084A - Platform guard gate and platform of unloading - Google Patents

Abstract

The application discloses a protective door for a discharging platform, which belongs to the field of discharging platforms and comprises a first door body and a second door body which are symmetrically and movably arranged, wherein the first door body and the second door body are locked through anchor bolts; the first locking component and the second locking component are arranged at intervals, the first locking component is movably arranged in the first door body, and the second locking component is movably arranged in the second door body; a connecting rod structure for triggering the two locking components is arranged between the first locking component and the second locking component; the pressing block can be lifted and pressed against the connecting rod structure, so that the first locking component and the second locking component interlock the first door body and the second door body; according to the application, the movable pressing block is used for acting the first locking component and the second locking component to lock the two shutter bodies, the first locking component and the second locking component can simultaneously and bidirectionally limit the two shutter bodies under the action of the connecting rod structure, and even if the door bodies are vibrated due to wind force or manual operation, the protective door cannot be accidentally opened.

Description

Platform guard gate and platform of unloading

Technical Field

The application relates to the technical field of discharge platform design, in particular to a discharge platform protective door and a discharge platform.

Background

In the construction process of the main body structure of the high-rise building, a discharging platform for lifting materials among floors, such as templates, steel pipe fasteners and the like, needs to be provided. The prior unloading platform is overhanging outside the storey by utilizing a pre-buried clamping ring and a hanging ring and is overhanging outside for a long time in the processes of material loading, unloading, lifting and idling until the construction of the main body structure is completed. The unloading platform is overhanging outside for a long time in the processes of material loading, unloading, lifting and idling, the phenomenon that a protective door is absent or is not closed exists is common, the phenomenon similar to the phenomenon of dummy is caused, the safety risk is high, the probability of accident occurrence in the material loading and transporting process is increased, the safety door in the unloading platform is simply locked by using a bolt in most construction sites, the height of a building floor is generally high nowadays, the air flow rate in the high air is high, the loosening phenomenon can occur when the bolt structure is used for a long time, the door plate is shaken due to the continuous action of wind force, and the bolt can be pulled open sometimes, so that great potential safety hazards occur.

The patent document CN102251666a discloses a cantilever type unloading platform, which comprises left and right main beams with the same structure, secondary beams erected between the main beams and wood scaffold boards paved on the main beams, wherein the main beams comprise lower brown rods and vertical rods extending upwards along the centers of the lower brown rods, left and right pull rods are arranged at two end parts of the lower brown rods from the top ends of the vertical rods, inclined web members are arranged at 1/4 of the positions, away from the left end, of the upper inclined brown rods from the top ends of the vertical rods, and the left and right pull rods, the lower brown rods and the inclined web members form a triangular truss; an auxiliary upright rod is arranged at the center of the lower brown rod on the left side of the vertical rod in an upward extending way; the left end of the lower front rod is provided with the side rod vertically upwards, a railing is arranged between the vertical rod and the side rod, the safety door in the structure is very simple and crude in structure, and the safety degree cannot be effectively ensured.

Disclosure of Invention

The application aims to provide a discharge platform protective door and a discharge platform, which are used for solving the problems that the safety door of the discharge platform in the prior art is low in locking degree and insufficient in locking strength, and is easy to loosen and even open automatically.

In order to achieve the above purpose, the application is realized by adopting the following technical scheme: a platform guard gate for discharging material, comprising

The door body I and the door body II are symmetrically and movably arranged, and the door body I and the door body II are locked through anchor bolts;

the first locking component and the second locking component are arranged at intervals, the first locking component is movably arranged in the first door body, and the second locking component is movably arranged in the second door body; a connecting rod structure for triggering the two locking components is arranged between the first locking component and the second locking component;

and the pressing block can be lifted and pressed against the connecting rod structure, so that the first locking component and the second locking component interlock the first door body and the second door body.

According to the further scheme, the first limiting ring is fixed on the side, close to the second door, of the first door body, the second limiting ring is fixed on the side, close to the first door, of the second door body, the first limiting ring and the second limiting ring are coaxial in ring center, the lower margin bolts are inserted into the first limiting ring and the second limiting ring, and the lower margin bolts are matched with the two limiting rings on the door for primary locking in a frightening manner in the device, so that implementation operation of the locking assembly is facilitated.

According to a further scheme of the application, the first locking component and the second locking component have the same structure; the first locking component is arranged at the upper part of the first door body, and the second locking component is arranged at the lower part of the second door body; the first locking component comprises a mounting seat with a mounting groove, the mounting seat is fixedly connected with a first door body, a first lock rod is movably mounted in the mounting groove through a spring, one end of the first lock rod, which is close to a second door body, is integrally connected with a first lock tongue, one end of the first lock rod, which is far away from the second door body, is an inclined plane, and the first lock tongue penetrates through the mounting groove to enter a second lock hole on the second door body; the second lock tongue of the second locking component is movably inserted into a first lock hole on the first door body, and the connecting rod structure is movably abutted to the inclined plane of the first lock rod and the inclined plane of the second lock rod in the second locking component.

According to the design scheme, under the action of external force, the first lock rod and the second lock rod can be moved to carry out cross locking on the first door body and the second door body, so that the stress of the two door bodies is balanced.

According to a further scheme of the application, the connecting rod structure comprises a guide rod, the guide rod is vertically and movably arranged in a through hole of a first door body through a spring, a first wedge block is fixed on a rod body penetrating through a mounting seat of the guide rod, the first wedge block is attached to an inclined plane of a first lock rod, a supporting rod is arranged in a mounting hole at the bottom of a second door body through the spring, the supporting rod penetrates through a rod body in a second locking assembly and is fixed with a second wedge block, and the second wedge block is attached to the inclined plane of the second lock rod; the device also comprises a rocker, wherein the rocker is arranged on the base plate through a hinge seat, one end of the rocker is movably contacted with the abutting rod, and the other end of the rocker is movably contacted with the contact guide rod.

Based on the scheme, after the pressing block triggers the guide rod, the first wedge on the guide rod acts on the number I lock rod, and simultaneously triggers the rocker to drive the abutting rod to act on the number II lock rod, and under the action of the connecting rod mechanism, the two lock rods simultaneously lock.

According to a further scheme of the application, a lifting assembly is arranged on a side plate of the first door body far away from the second door body, and the pressing block is fixedly arranged on the lifting assembly; the lifting assembly comprises a cambered plate fixed on a first door body side plate, a screw rod is rotatably installed on the cambered plate side plate through a bearing with a seat, a sliding block is installed on the screw rod in a threaded fit mode, a motor is installed at the bottom of the cambered plate, an output shaft of the motor penetrates through the cambered plate and is rotationally connected with the screw rod through a coupling, a guide rod is installed at the top of a second door body, a connecting rod is arranged between the sliding block and the guide rod, one end of the connecting rod is fixedly connected with the sliding block, a guide pipe is welded at the other end of the connecting rod, the guide pipe is sleeved on the guide rod, and the pressing block is fixedly connected with the connecting rod.

Regarding the lifting component, a motor drives a screw rod to move up and down, a guide tube and a guide rod prevent the connecting rod from deflecting when moving, and a pressing block on the connecting rod can precisely act on a guide rod to trigger two locking components simultaneously.

The design of more step one, limit assembly is still installed to door body bottom, limit assembly includes the lockpin, and the lockpin passes through the mounting hole of spring installation in door body bottom, and the lockpin stretches into the tip inclined plane in the lockhole and the inclined plane match of No. two spring bolts, and is equipped with the stopping groove on the inclined plane of No. two spring bolts, and limit assembly's design plays No. two spring bolts stopping effect in the lockhole, even lifting unit unexpected failure, still can guarantee the locking security of guard gate.

The novel door comprises a lock pin, a pressing block, a first door body, a second door body, a first guide wheel, a second guide wheel, a first rope, a second guide wheel, a first pressing block, a second pressing block, a third pressing block, a fourth pressing block, a fifth pressing block, a fourth pressing block and a fourth pressing block.

According to the scheme, the inhaul cable structure is matched with the limiting assembly, the second lock tongue is fixed by the lock pin which is elastically released after entering the first lock hole, even if the motor is damaged, the locking degree of the door body can still be guaranteed, the pressing block is lifted, the lock pin is synchronously pulled out through the action of the stay rope, automatic unlocking is achieved, the use is convenient, and the design is humanized.

Preferably, the first door body and the second door body are made of aluminum alloy materials, and the aluminum alloy materials have the characteristics of rust prevention, small quality, high strength and the like.

The application also provides a discharging platform which comprises the discharging platform protective door and a material frame, wherein the first door body is hinged with one side plate of the material frame, and the second door body is hinged with the other side plate of the material frame.

The application further provides a further scheme of the discharging platform, and I-steel is symmetrically arranged on two sides of the bottom plate of the material frame.

According to the technical scheme, the application has the following effects:

the safety door of the discharging platform changes the traditional simple bolt locking mode, adopts the movable pressing block to act on the first locking component and the second locking component to lock the two shutter bodies, and the first locking component and the second locking component can simultaneously and bidirectionally limit the two shutter bodies under the action of the connecting rod structure, so that the safety door has high locking firmness and high locking efficiency, and even if the door body is vibrated due to wind force or manual operation, the safety door cannot be accidentally opened;

the wedge-shaped block in the connecting rod structure is matched with inclined planes on the first locking component and the second locking component, so that the structure is stable in operation and high in transmission efficiency, two locking rods are ensured to be inserted into lock holes of corresponding door bodies simultaneously and accurately, meanwhile, the load born by the two door bodies can be reduced and balanced by bidirectional locking, and the service time of the door bodies is prolonged;

in addition, the protective door is provided with a inhaul cable structure between the lifting assembly and the first door body, the lifting structure moves up the pressing block to drive the rope to act on the locking pin by using the cooperation of the rope and the locking pin, the limit of the locking pin can be canceled in the process, two locking bolts can be simultaneously retracted, and the protective door can be finally and rapidly unlocked by the group.

Drawings

FIG. 1 is an isometric view of the present application;

FIG. 2 is a top plan view of the present application;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is an enlarged view of FIG. 3 at B;

FIG. 6 is an enlarged view of FIG. 3 at C;

fig. 7 is a view of another view of the present application.

Wherein: a first door body 101, a second door body 102, a first lock hole 101.1 and a second lock hole 102.1;

a No. 2 locking component, a No. 21 locking rod, a No. 22 spring, a No. 23 mounting seat, a No. 24 lock tongue,

A second locking component;

4 pressing blocks, 41 arched plates, 42 screw rods, 43 sliding blocks, 44 guide rods and 45 motors;

61 guide rod, 62 wedge, 63 wane, 64 wedge.

Detailed Description

The application is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the application easy to understand.

It should be noted that, in the description of the present application, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and do not require that the present application must be constructed and operated in a specific direction, and thus should not be construed as limiting the present application. The terms "front", "back", "left", "right", "upper", "lower" as used in the description of the present application refer to directions in the drawings, and the terms "inner", "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

As shown in fig. 1 to 7, the application discloses a protection door of a discharging platform, which comprises a first door body 101 and a second door body 102 which are symmetrically arranged, wherein the first door body 101 and the second door body 102 are locked through anchor bolts; the first locking component 2 and the second locking component 3 are arranged at intervals, the first locking component 2 is movably arranged in the first door body 101, and the second locking component 3 is movably arranged in the second door body 102; a connecting rod structure for triggering the two locking components is arranged between the first locking component 2 and the second locking component 3; the pressing block 4 can be lifted, and the pressing block 4 moves to abut against the connecting rod structure, so that the first locking component 2 and the second locking component 3 are interlocked with the first door body 101 and the second door body 102.

Referring to fig. 1, in this embodiment, a first stop ring is fixed on a side surface of a first door body 101, which is close to a second door body 102, a second stop ring is fixed on a side surface of a second door body 102, which is close to the first door body 101, the first stop ring and the second stop ring are concentric, and a foundation bolt is inserted into the first stop ring and the second stop ring, so that the first door body 101 and the second door body 102 are initially closed and locked.

Referring to fig. 3, 5 and 6, specific structures of the first locking component 2 and the second locking component 3 in this embodiment are shown, the structures of the two locking components are the same, taking the first locking component 2 as an example, the first locking component 2 includes a mounting seat 23 with a mounting groove, the mounting seat 23 is fixedly connected with the first door body 101, the second door body 102 is hollow during production, the mounting seat 23 is convenient to install while weight is reduced, a first locking rod 21 is movably installed in the mounting groove through a spring 22, one end of the first locking rod 21, which is close to the second door body 102, is integrally connected with a first locking bolt 24, one end of the first locking rod 21, which is far away from the second door body 102, is an inclined plane, the first locking bolt 24 penetrates through the mounting groove to enter the second locking hole 102.1 on the second door body 102, the second locking bolt 101 is movably inserted into the first locking hole 101.1 on the first door body 101 of the second locking component 3, and the connecting rod structure is movably abutted against the inclined plane of the first locking rod 21 and the second locking rod 3 in the second locking component 3.

Regarding the design of the connecting rod structure in this embodiment, the design concept needs to ensure that the triggering of the connecting rod structure can ensure that the first locking component 2 and the second locking component 3 are simultaneously acted to realize efficient and stable locking effect, and fig. 3, 5 and 6 are observed again, wherein the specific structure of the connecting rod structure is provided, and the connecting rod structure comprises a guide rod 61, the guide rod 61 is vertically and movably installed in a through hole of the first door body 101 through a spring, the guide rod 61 penetrates through a rod body of the mounting seat 23 to be fixed with a first wedge block 62, the first wedge block 62 is attached to an inclined surface of the first lock rod 21, a supporting rod is installed in a mounting hole at the bottom of the second door body 102 through a spring, the supporting rod penetrates through a rod body in the second locking component 3 to be fixed with a second wedge block 64, and the inclined surface of the second wedge block 64 is attached to the inclined surface of the second lock rod;

the application further comprises a rocker 63, wherein the rocker 63 is arranged on the base plate through a hinge seat, one end of the rocker 63 is movably contacted with the abutting rod, the other end of the rocker 63 is movably contacted with the contact guide rod 61, the protective door related to the application is mainly used on a discharging platform, a Z-shaped groove can be formed in a bottom plate of a material box when the rocker 63 is arranged, a torsion spring is arranged between the rocker 63 and the hinge seat, in an initial state, the rocker 63 is abutted to a shallow groove end of the Z-shaped groove, the shallow groove end is arranged at a vertical projection position of the second locking component 3 on the bottom plate, and a deep groove end of the Z-shaped groove is arranged at a vertical projection position of the first locking component 2 on the bottom plate, so that the rocker 63 can be effectively hidden, the disabled rocker 63 is prevented from interfering with walking of workers, and accidental tripping is prevented.

Referring to fig. 3 and 4, a lifting assembly for driving a pressing block 4 in this embodiment is provided, the lifting assembly is mounted on a side plate of a first door body 101 far away from a second door body 102, the lifting assembly comprises a cambered plate 41 fixed on the side plate of the first door body 101, a screw rod 42 is rotatably mounted on the side plate of the cambered plate 41 through a bearing with a seat, a sliding block 43 is mounted on the screw rod 42 in a threaded fit manner, a motor 45 is mounted at the bottom of the cambered plate 41, an output shaft of the motor 45 penetrates through the cambered plate 41 and is rotatably connected with the screw rod 42 through a coupling, a guide rod 44 is mounted at the top of the second door body 102, a connecting rod is arranged between the sliding block 43 and the guide rod 44, one end of the connecting rod is fixedly connected with the sliding block 43, the other end of the connecting rod is welded with a guide tube, the guide tube is sleeved on the guide rod 44, the pressing block 4 is fixedly connected with the connecting rod, and the motor 45 is started to drive the screw rod 42 to rotate, and then the pressing block 4 on the connecting rod is driven to move up and down;

when the pressing block 4 moves downwards to press the guide rod 61, the first lock rod 21 is forced to move into the second lock hole 102.1 of the second door body 102 under the extrusion of the first wedge block 62,

meanwhile, the pressing guide rod 61 acts on the left end of the rocker 63 (as shown in fig. 3 for example), the right end of the rocker 63 rises and acts on the pressing abutment rod, and the second wedge 64 on the abutment rod forces the second lock rod to move towards the first lock hole 101.1 of the first door body 101.

Based on the technical scheme of the embodiment, some embodiments add some adaptive designs, the bottom of the first door body 101 is provided with a limiting component, the limiting component comprises a lock pin 7, the lock pin 7 is arranged in a mounting hole at the bottom of the first door body 101 through a spring, the inclined plane of the end part of the lock pin 7 extending into the first lock hole 101.1 is matched with the inclined plane of the second lock tongue, and the inclined plane of the second lock tongue is provided with a retaining groove.

Considering the overall linkage of the device, still be connected with the cable structure between lockpin 7 and briquetting 4, the cable structure includes stay cord 8, the guide pulley is all installed to the curb plate upper and lower end that door body 101 is close to lifting unit, stay cord 8 one end rope connects the connecting rod, the other end is two guide pulley and rope joint lockpin 7 of anticlockwise overlap joint in proper order, in specific production, turn to and carry out the chamfer processing with the door panel turning essence at stay cord 8, the setting of guide pulley can be increased if necessary, guarantee that stay cord 8 smoothly moves, this design emphasis is in stay cord 8 when being lifted by lifting unit, along with guide arm 61 rises, the wane 63 has released the constraint of butt pole, stay cord 8 atress and outwards pulls out the lockpin 7 this moment, natural lockpin 7 releases the locking to No. two spring bolts (no limit component's effect on No. 1 locking component 2, no. two locking component's other operation processes are with No. two locking component, the process is just not repeated), because the setting of cable structure, no need the manual action lockpin 7 can unblock No. two spring bolts to the restriction of door body 101.

In addition, a guide pipe can be arranged on the side plate between the first guide wheels, so that the loosening of the pull rope 8 is prevented from being used for a long time, and the using effect is prevented from being influenced.

The aluminum alloy material has the characteristics of rust prevention, small mass, high strength and the like, and the first door body and the second door body are made of the aluminum alloy material.

The application also provides a discharging platform which comprises the protective door and the material frame, wherein the first door body 101 is hinged with one side plate of the material frame, the second door body 102 is hinged with the other side plate of the material frame, and the two side plates are symmetrically arranged on two sides of the bottom plate.

The mounting of the unloading platform is convenient, and when the unloading platform is mounted, a pair of I-steel is symmetrically mounted on two sides of the material frame bottom plate.

The specific application is as follows:

when the safety door of the discharging platform is locked, the safety door of the discharging platform is divided into a first door body 101 and a second door body 102 which are hinged, and after the first door body 101 and the second door body 102 are closed, the safety door is fixed by using a foundation bolt, and at the moment, the two door bodies are preliminarily locked;

at the moment, a motor 45 in the lifting assembly is started, the pressing block 4 is forced to press the downward moving guide rod 61 through the rotation of the screw rod 42, the first lock rod 21 is enabled to generate transverse displacement under the action of the first wedge block 62 on the guide rod 61, and finally the first lock rod enters the second lock hole 102.1 of the second door body 102;

simultaneously, the bottom end of the guide rod 61 starts the rocker 63, so that the other end of the rocker 63 presses the second wedge-shaped block 64 on the upper moving support rod, the second lock rod drives the second lock tongue to enter the first lock hole 101.1 in the first door body 101 in the process, the second lock tongue and the lock pin 7 generate relative displacement in the process, and finally one end of the lock pin 7 enters a stop groove of the second lock tongue;

when unlocking, the starting motor 45 drives the pressing block 4 to move upwards, at the moment, the pressing block 4 releases the constraint on the guide rod 61, and the pressing block returns under the recovery action of the spring on the guide rod 61, and the first locking rod 21 returns and withdraws;

the upward movement of the pressing block 4 is accompanied with the process of tightening the stay rope 8 in the stay rope structure and pulling the lock pin 7, when the lock pin 7 is pulled out of the retaining groove of the No. two lock bolts, the No. two lock bolts are reset and retracted, and then the pressing block 4 and a proper amount of connecting rod are moved downwards, so that the lock pin 7 is reset for the next use.

Finally, the first door body 101 and the second door body 102 can be opened by pulling out the foundation bolts.

The discharging platform protective door has the advantages of good locking effect, high safety performance and higher automation degree.

It will be appreciated by those skilled in the art that the present application can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the application or equivalents thereto are intended to be embraced therein.

Claims (10)

1. The utility model provides a platform guard gate of unloading which characterized in that includes

The door body I (101) and the door body II (102) are symmetrically and movably arranged, and the door body I (101) and the door body II (102) are locked through anchor bolts;

the first locking component (2) and the second locking component (3) are arranged at intervals, the first locking component (2) is movably arranged in the first door body (101), and the second locking component (3) is movably arranged in the second door body (102); a connecting rod structure for triggering the two locking components is arranged between the first locking component (2) and the second locking component (3);

the pressing block (4) can be lifted, and the pressing block (4) moves to abut against the connecting rod structure, so that the first locking component (2) and the second locking component (3) are interlocked with the first door body (101) and the second door body (102).

2. The platform protection door according to claim 1, wherein a first limit ring is fixed on the side surface of the first door body (101) close to the second door body (102), a second limit ring is fixed on the side surface of the second door body (102) close to the first door body (101), the first limit ring and the second limit ring are coaxial in ring center, and the foundation bolt is inserted into the first limit ring and the second limit ring.

3. The platform guard door according to claim 1, wherein the first locking assembly (2) and the second locking assembly (3) are identical in structure; the first locking component (2) is arranged at the upper part of the first door body (101), and the second locking component (3) is arranged at the lower part of the second door body (102);

the first locking assembly (2) comprises a mounting seat (23) with a mounting groove, the mounting seat (23) is fixedly connected with a first door body (101), a first locking rod (21) is movably mounted in the mounting groove through a spring (22), one end, close to a second door body (102), of the first locking rod (21) is integrally connected with a first locking bolt (24), one end, far away from the second door body (102), of the first locking rod (21) is an inclined plane, and the first locking bolt (24) penetrates through the mounting groove to enter a second locking hole (102.1) in the second door body (102);

the second lock tongue in the second locking component (3) is movably inserted into a first lock hole (101.1) on the first door body (101), and the connecting rod structure is movably abutted to the inclined plane of the first lock rod (21) and the inclined plane of the second lock rod in the second locking component (3).

4. The discharging platform protective door according to claim 3, wherein the connecting rod structure comprises a guide rod (61), the guide rod (61) is vertically and movably installed in a through hole of a first door body (101) through a spring, a first wedge block (62) is fixed on a rod body of the guide rod (61) penetrating through the installation seat (23), the first wedge block (62) is attached to an inclined surface of a first lock rod (21), an abutting rod is installed in an installation hole at the bottom of a second door body (102) through the spring, the abutting rod penetrates through a rod body in a second locking assembly (3) to be fixed with a second wedge block (64), and the second wedge block (64) is attached to the inclined surface of the second lock rod;

the novel structure is characterized by further comprising a rocker (63), wherein the rocker (63) is arranged on the substrate through a hinge seat, one end of the rocker (63) is movably contacted with the abutting rod, and the other end of the rocker is movably contacted with the guide rod (61).

5. The protective door for the discharging platform according to claim 4, wherein a lifting assembly is arranged on a side plate of the first door body (101) far away from the second door body (102), and the pressing block (4) is fixedly arranged on the lifting assembly;

the lifting assembly comprises a cambered plate (41) fixed on a side plate of a first door body (101), a screw rod (42) is rotatably installed on the side plate of the cambered plate (41) through a bearing with a seat, a sliding block (43) is installed on the screw rod (42) in a threaded fit mode, a motor (45) is installed at the bottom of the cambered plate (41), an output shaft of the motor (45) penetrates through the cambered plate (41) and is rotationally connected with the screw rod (42) through a coupling, a guide rod (44) is installed at the top of a second door body (102), a connecting rod is arranged between the sliding block (43) and the guide rod (44), one end of the connecting rod is fixedly connected with the sliding block (43), the other end of the connecting rod is welded with a guide pipe, and the guide pipe is sleeved on the guide rod (44), and the pressing block (4) is fixedly connected with the connecting rod.

6. The platform protection door of claim 5, wherein the first door body (101) is further provided with a limiting component at the bottom, the limiting component comprises a lock pin (7), the lock pin (7) is installed in a mounting hole at the bottom of the first door body (101) through a spring, the end inclined plane of the lock pin (7) extending into the first lock hole (101.1) is matched with the inclined plane of the second lock tongue, and a retaining groove is formed in the inclined plane of the second lock tongue.

7. The platform protection door of unloading according to claim 6, wherein a guy rope structure is further connected between the lock pin (7) and the pressing block (4), the guy rope structure comprises a guy rope (8), a guide wheel is installed at the upper end and the lower end of the side plate of the first door body (101) close to the lifting assembly, one end of the guy rope (8) is connected with a connecting rod in a rope mode, and the other end of the guy rope is sequentially connected with the two guide wheels in a anticlockwise mode and is connected with the lock pin (7).

8. The discharge platform protection door according to claim 1, wherein the first door body (101) and the second door body (102) are made of aluminum alloy materials.

9. The discharging platform is characterized by comprising the discharging platform protective door and the material frame according to any one of claims 1-8, wherein the first door body (101) is hinged with one side plate of the material frame, and the second door body (102) is hinged with the other side plate of the material frame.

10. The discharging platform according to claim 1, wherein the material frame is symmetrically provided with i-bars on both sides of the bottom plate.