Stack load limiting device for overhanging discharging platform

Abstract

The utility model relates to the technical field of building construction, and provides a stacking limiting device for a cantilever discharging platform. In the stacking limiting device, movable sliding blocks are mounted in fixed sliding rails, and two fixing rings are mounted on each movable sliding block; every two opposite movable sliding blocks are connected through a connecting rod, and the connecting rods penetrate through the ends, close to the inlet and outlet of the discharging platform, of the covering tarpaulin. A main driving wheel and a driven wheel are installed at the two ends of each fixed sliding rail respectively, the output ends of the driving motors are connected with the main driving wheels installed on the corresponding fixed sliding rails, and the driving motors receive control instructions of the programmable logic controller to move or stop. Each fixed sliding rail is provided with a driving chain in a matched mode, one end of each driving chain bypasses the main driving wheel on the corresponding fixed sliding rail and then is connected with one fixing ring on the corresponding movable sliding rail, and the other end of each driving chain bypasses the driven wheel on the corresponding fixed sliding rail and then is connected with the other fixing ring on the corresponding movable sliding block.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to a stacking limiting device for a cantilevered unloading platform. Background Art

[0002] In construction projects, cantilever unloading platforms are a common facility, mainly used for vertical transportation of materials. Usually, cantilever unloading platforms are composed of a qualitatively manufactured material platform, a steel wire rope and corresponding buckles, anchor rings and pull rings embedded in the structure, and some accessories that play a fixing role. According to the engineering safety management regulations, cantilever unloading platforms belong to the sub-projects with higher risks, and there are many influencing factors during use and installation.

[0003] During the design, production, installation, and turnover installation of the cantilever unloading platform, professional personnel will be on site to conduct strict acceptance inspections to control the safety risks of the platform. However, during the use phase, the safety of the platform is only controlled by inspections by management personnel, which is too risky. Once an accident occurs, the consequences will be disastrous.

[0004] Therefore, there is an urgent need to provide a technical solution to the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present application is to provide a stacking limiting device for a cantilever unloading platform to solve or alleviate the problems existing in the above-mentioned prior art.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a stacking limiting device for a cantilevered unloading platform, wherein a plurality of weight sensors are evenly distributed between a stacking bottom plate and a bottom frame of the unloading platform, wherein the weight sensors are used to monitor the weight of the stacking on the stacking bottom plate in real time, and send the monitored weight of the stacking on the stacking bottom plate to a programmable logic controller, so that the programmable logic controller controls the movement of the stacking limiting device installed on the unloading platform to cover the unloading platform; the stacking limiting device comprises: a driving motor, a fixed slide rail, a movable slider, a covering tarpaulin and a driving chain; the fixed slide rails are provided with two, and the two fixed slide rails are detachably installed on the side guardrails of the unloading platform along the width direction of the unloading platform, and a movable slider is installed in each of the fixed slide rails, and two fixing rings are installed on each of the movable sliders; the two movable sliders are connected by a connecting rod, and the connecting rod is passed through one end of the covering tarpaulin close to the inlet and outlet of the unloading platform, and the other end of the covering tarpaulin is fixedly connected to the rear guardrail of the unloading platform;

[0008] The driving motor is installed on one of the fixed slide rails. A main driving wheel and a driven wheel are respectively installed at two ends of the fixed slide rail. The output end of the driving motor is connected to the main driving wheel installed on the corresponding fixed slide rail. The driving motor receives control instructions from the programmable logic controller to move or stop.

[0009] One driving chain is adaptively installed on each fixed slide rail. One end of the driving chain bypasses the main driving wheel on the corresponding fixed slide rail and is connected to one fixed ring on the corresponding moving slider. The other end of the driving chain bypasses the driven wheel on the corresponding fixed slide rail and is connected to the other fixed ring on the corresponding moving slider.

[0010] Preferably, the fixed slide rail is a rectangular housing structure with openings at both ends, and waist-shaped slideways are provided on two side walls of the rectangular housing structure and face each other. Correspondingly, moving guide columns are respectively provided on two end faces of the moving slider, and the moving guide columns are located in the waist-shaped slideways; and / or, a through threaded hole is further provided on the moving slider, and the through threaded hole is coaxial with the moving guide column and is used for threadedly connecting the connecting rod.

[0011] Preferably, a positioning mounting plate is detachably connected to one end of the fixed slide rail where the driven wheel is installed. A first bearing mounting hole is provided on the positioning mounting plate. Correspondingly, a second bearing mounting hole is provided on the side wall of the fixed slide rail, and the second bearing mounting hole faces the first bearing mounting hole.

[0012] Preferably, an installation groove is formed on the side wall of the fixed slide rail facing the second bearing mounting hole along the length direction of the fixed slide rail. Correspondingly, the positioning mounting plate includes an end cover plate and a bearing hole plate. The end cover plate is in contact with the end face of the fixed slide rail, the bearing hole plate is perpendicular to the end cover plate and is inserted into the installation groove, and the first bearing mounting hole is provided on the bearing hole plate.

[0013] Preferably, limiting grooves are respectively provided on the upper and lower surfaces of the installation groove that face each other. Correspondingly, the bearing hole plate includes a first limiting portion and a second limiting portion. The first limiting portion is in contact with the inner wall of the fixed slide rail, and the second limiting portion is inserted into the limiting groove.

[0014] Preferably, a shaped pin shaft counterbore is provided on the outer side wall of the bearing hole plate, and the pin shaft counterbore is coaxial with the first bearing mounting hole.

[0015] Preferably, the fixed slide rail is a split combined structure, including: an end fixing section and a length adjusting section. The end faces of the end fixing section and the length adjusting section in contact with each other are respectively provided with a plurality of positioning and mounting holes, and positioning connecting pins are installed in each of the plurality of positioning and mounting holes.

[0016] Preferably, the length adjusting section includes fastening members arranged symmetrically up and down. The cross-section of the fastening member is U-shaped, and a plurality of the positioning and mounting holes are respectively provided at both ends.

[0017] Preferably, the fixed slide rail is clamped on the side guardrail of the unloading platform through an elastic fastener; wherein, the upper surface of the elastic fastener is fixedly connected to the lower surface of the fixed slide rail, and a semi-closed buckle is provided at the lower part of the elastic fastener to be clamped on the side guardrail.

[0018] Beneficial effects:

[0019] The load stacking limiting device for the cantilever unloading platform provided by the embodiment of the present application monitors the stacking weight on the stacking bottom plate in real time through a plurality of load sensors evenly distributed between the stacking bottom plate of the unloading platform and the bottom frame, and sends the monitored stacking weight on the stacking bottom plate to the programmable logic controller, so that the programmable logic controller controls the load stacking limiting device installed on the unloading platform to move and cover the unloading platform.

[0020] In the load stacking limiting device, there are 2 fixed slide rails. The 2 fixed slide rails are detachably installed on the side guardrails of the unloading platform along the width direction of the unloading platform. One moving slider is installed in each fixed slide rail, and 2 fixed rings are installed on each moving slider; the two opposite moving sliders are connected by a connecting rod. The connecting rod penetrates through one end of the covering tarpaulin near the import and export of the unloading platform, and the other end of the covering tarpaulin is fixedly connected to the rear guardrail of the unloading platform. A driving motor is installed on one of the fixed slide rails. A main driving wheel and a driven wheel are respectively installed at both ends of the fixed slide rail. The output end of the driving motor is connected to the main driving wheel installed on the corresponding fixed slide rail. The driving motor receives the control instruction of the programmable logic controller to move or stop; a driving chain is adaptively installed on each fixed slide rail. One end of the driving chain bypasses the main driving wheel on the corresponding fixed slide rail and then is connected to one of the fixed rings on the corresponding moving slide rail. The other end of the driving chain bypasses the driven wheel on the corresponding fixed slide rail and is connected to the other fixed ring on the corresponding moving slider.

[0021] Accordingly, after receiving the instruction from the programmable logic controller, the drive motor rotates forward or backward according to the instruction of the programmable logic controller, drives the moving slider to move in the fixed slide rail through the drive chain, and covers from above the unloading platform through the covering tarpaulin, effectively restricting the material loading operation on the unloading platform, so as to avoid dangers such as overloading caused by continuing to load materials onto the unloading platform, and ensure the safe operation of the unloading platform. Description of the Drawings

[0022] The schematic drawings of the specification forming a part of the present application are used to provide a further understanding of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application.

[0023] Wherein:

[0024] Figure 1 It is a schematic installation diagram of a load stacking limiting device for a cantilever unloading platform on the unloading platform according to some embodiments of the present application;

[0025] Figure 2 It is a schematic structural diagram of a load stacking limiting device for a cantilever unloading platform according to some embodiments of the present application;

[0026] Figure 3 It is an axonometric schematic diagram of a load stacking limiting device for a cantilever unloading platform according to some embodiments of the present application;

[0027] Figure 4 It is a schematic structural diagram of an end fixing section at one end in the fixed slide rail according to some embodiments of the present application;

[0028] Figure 5 It is a schematic structural diagram of an end fixing section at the other end in the fixed slide rail according to some embodiments of the present application;

[0029] Figure 6 It is Figure 5 a partial schematic diagram at A in

[0030] Figure 7 It is a schematic installation diagram of a driven wheel according to some embodiments of the present application;

[0031] Figure 8 It is a schematic structural diagram of a positioning mounting plate according to some embodiments of the present application;

[0032] Figure 9 It is a schematic structural diagram of a moving slider according to some embodiments of the present application;

[0033] Figure 10 It is a schematic structural diagram of an elastic fastener according to some embodiments of the present application.

[0034] Description of the reference numerals:

[0035] 1. Stockpiling bottom plate; 2. Side guardrail; 3. Rear guardrail; 4. Fixed slide rail; 5. Moving slider; 6. Driving motor; 7. Main driving wheel; 8. Driven wheel; 9. Elastic fastener; 10. End fixing section; 11. Fastening member; 12. Positioning mounting plate; 13. Moving slideway; 14. Positioning mounting hole; 15. Mounting groove; 16. Second bearing mounting hole; 17. Limiting groove; 18. First bearing mounting hole; 19. First limiting portion; 20. Second limiting portion; 21. Moving guide post; 22. Through threaded hole; 23. Rotating pin shaft. Detailed implementation manners

[0036] The present application will be described in detail below with reference to the drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application rather than limiting the present application. In fact, those skilled in the art will clearly understand that modifications and variations can be made to the present application without departing from the scope or spirit of the present application. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention should fall within the scope of protection of the embodiments of the present invention.

[0037] As a commonly used facility in construction, during the processes of design and fabrication, installation, and turnover installation and disassembly of the cantilever unloading platform, there will be professional personnel on-site for strict acceptance, so as to control the safety risks of the platform. However, during the use stage of the unloading platform, when manually loading materials onto the unloading platform, the material loading workers cannot effectively determine whether the material loading on the unloading platform exceeds the standard. Only relying on the inspection by the management personnel to control the safety of the platform poses too great a risk. Once an accident occurs, the consequences will be unimaginable.

[0038] Based on this, in the present application, a plurality of weight sensors are evenly distributed between the stockpiling bottom plate 1 of the unloading platform and the bottom frame to monitor the stockpiling weight on the stockpiling bottom plate 1 in real time, and the monitored stockpiling weight on the stockpiling bottom plate 1 is sent to the programmable logic controller. The programmable logic controller controls the movement of the load limiting device installed on the side guardrail 2 of the unloading platform to cover the unloading platform, so as to avoid dangers such as overloading caused by continued material loading onto the unloading platform, effectively restrict the material loading operation of the unloading platform, and ensure the safe operation of the unloading platform.

[0039] As Figures 1 to 10As shown in the figure, in the load stacking limit device for the cantilever unloading platform, there are two fixed slide rails 4, and the two fixed slide rails 4 are detachably installed on the side guardrails of the unloading platform along the width direction of the unloading platform. One moving slider 5 is installed in each fixed slide rail 4, and two fixed rings are installed on each moving slider 5. The two moving sliders 5 are connected by a connecting rod. The connecting rod passes through one end of the covering tarpaulin close to the loading and unloading opening of the unloading platform, and the other end of the covering tarpaulin is fixedly connected to the rear guardrail 3 of the unloading platform. A driving motor 6 is installed on one of the fixed slide rails 4. A main driving wheel 7 and a driven wheel 8 are respectively installed at both ends of the fixed slide rail 4. The output end of the driving motor 6 is connected to the main driving wheel 7 installed on the corresponding fixed slide rail 4. The driving motor 6 receives the control instruction of the programmable logic controller to move or stop.

[0040] A driving chain is adaptively installed on each fixed slider. One end of the driving chain bypasses the main driving wheel 7 on the corresponding fixed slide rail 4 and then is connected to one of the fixed rings on the corresponding moving slider 5. The other end of the driving chain bypasses the driven wheel 8 on the corresponding fixed slide rail 4 and then is connected to the other fixed ring on the corresponding moving slider 5.

[0041] During the loading operation, when the loading worker loads materials onto the unloading platform and the weight of the materials on the unloading platform reaches 95% of the designed load of the unloading platform, the programmable logic controller sends a control instruction to the driving motor 6. The driving motor 6 operates, driving the main driving wheel 7 to rotate. Then, the driving chain moves around the driven wheel 8 and the main driving wheel 7. The moving sliders 5 connected to both ends of the driving chain move along the fixed slide rail 4, causing the connecting rod to move along the length direction of the unloading platform, driving the covered tarpaulin to move, covering the unloading platform to avoid dangers such as overloading caused by continued loading of materials onto the unloading platform, and ensuring the safe operation of the unloading platform.

[0042] At the same time, audible and visual alarm devices can also be set on the unloading platform. When the weight of the materials on the unloading platform reaches 95% of the designed load of the unloading platform, while covering the unloading platform, the audible and visual alarm devices emit audible and visual alarm signals to remind of the operation of the device.

[0043] In this application, the fixed slide rail 4 is a rectangular shell structure with openings at both ends. Waist-shaped slideways are provided on the two side walls of the rectangular shell structure. Correspondingly, moving guide columns 21 are respectively provided on both end faces of the moving slider 5, and the moving guide columns 21 are located in the waist-shaped slideways. When the driving motor 6 works, it drives the moving slider 5 to move within the rectangular shell structure, and the moving guide columns 21 slide relative to the waist-shaped slideways. At the same time, a through threaded hole 22 coaxial with the moving guide column 21 is provided on the moving slider 5 for threaded connection with the connecting rod.

[0044] Specifically, the connecting rod passes through one end of the covering tarpaulin, and the two ends protruding from the covering tarpaulin are respectively threadedly connected into the through threaded holes 22 of the two moving sliders 5. Here, it should be noted that the thread rotation directions in the through threaded holes 22 of the two moving sliders 5 are opposite, and by rotating the connecting rod, the distance between the two moving sliders 5 can be adjusted.

[0045] On the fixed slide rail 4, one end of the driven wheel 8 is detachably connected with a positioning mounting plate 12. A first bearing mounting hole 18 is opened on the positioning mounting plate 12, and a second bearing mounting hole 16 is opened on the side wall of the fixed slide rail 4. The second bearing mounting hole 16 is opposite to the first bearing mounting hole 18. Rotating shaft bearings are respectively installed in the first bearing mounting hole 18 and the second bearing mounting hole 16, so as to install the driven wheel 8 by rotating the pin shaft 23.

[0046] In a specific example, on the fixed slide rail 4, an installation groove 15 is opened on the side wall opposite to the second bearing mounting hole 16 along the length direction of the fixed slide rail 4. Correspondingly, the positioning mounting plate 12 includes: an end cover plate and a bearing hole plate. The end cover plate is connected to the end face of the fixed slide rail 4, and the bearing hole plate is perpendicular to the end cover plate. The first bearing mounting hole 18 is provided and inserted into the installation groove 15. Specifically, limiting grooves 17 are respectively provided on the upper and lower opposite surfaces of the installation groove 15, and a first limiting part 19 and a second limiting part 20 are respectively provided on the bearing hole plate. The first limiting part 19 is connected to the inner wall of the fixed slide rail 4, and the second limiting part 20 is inserted into the limiting groove 17.

[0047] That is to say, the upper and lower bottom surfaces of the first limiting part 19 of the bearing hole plate are connected to the upper and lower surfaces of the rectangular shell structure, and the side surface of the bearing hole plate close to the second limiting part 20 is connected to the inner side wall of the rectangular shell structure; at the same time, when the bearing hole plate is inserted into the installation groove 15, the second limiting part 20 is respectively slidably inserted into the limiting grooves 17 opened on the upper and lower surfaces of the installation groove 15. Furthermore, through the cooperation of the first limiting part 19 and the second limiting part 20, the movement of the bearing hole plate along the axis direction of the bearing is effectively avoided.

[0048] In this application, when the driven wheel 8 is installed, a pin shaft with a special-shaped head is installed in the special-shaped pin shaft counterbore coaxial with the first bearing mounting hole 18 provided on the outer side wall of the bearing hole plate to realize the installation and fixation of the driven wheel 8. In addition, the fixed slide rail 4 can adopt an integral structure or a split combined structure; the main driving wheel 7 and the driven wheel 8 can adopt a sprocket form or a rope wheel structure; correspondingly, the driving chain is a chain or a steel wire rope.

[0049] When the fixed slide rail 4 adopts a split combined structure, the fixed slide rail 4 includes an end fixing section 10 and a length adjustment section, and the end surfaces where the end fixing section 10 and the length adjustment section meet are respectively provided with a plurality of positioning installation holes 14, and positioning connecting pins are installed in the plurality of positioning installation holes 14, and the positioning connecting pins are tightly matched with the positioning installation holes 14. Thus, the effective connection between the length adjustment section and the end fixing section 10 is realized, and the length of the fixed slide rail 4 can be adjusted by different numbers of length adjustment sections to adapt to unloading platforms of different lengths.

[0050] In a specific example, the length adjustment section includes a fastener 11 symmetrically arranged up and down, and the cross-section of the fastener 11 is a U-shaped. Therefore, after the fastener 11 with the U-shaped cross-section is symmetrically arranged up and down, a movable slide 13 compatible with the movable guide column 21 can be formed between the openings of the U-shaped structure, thereby facilitating the movement of the movable slider 5.

[0051] In addition, it is provided that the slide rail is clamped on the side guardrail of the unloading platform through the elastic fastener 9, wherein the upper surface of the elastic fastener 9 is fixedly connected to the lower surface of the fixed slide rail 4, and the lower part of the elastic fastener 9 is provided with a semi-enclosed buckle to be clamped on the side slide rail. Specifically, the upper surface of the elastic buckle can be connected to the lower surface of the end fixed section 10 by welding or bolting. During installation, the semi-enclosed buckle at the lower part of the elastic fastener 9 is opened and clamped on the side guardrail.

[0052] In the stacking limiting device for a cantilevered unloading platform provided in the embodiment of the present application, after receiving the instruction of the programmable logic controller, the driving motor 6 rotates forward or reverse according to the instruction of the programmable logic controller, drives the movable slider 5 to move in the fixed slide rail 4 by driving the chain, and covers the unloading platform from above with a covering tarpaulin, so as to effectively restrict the material loading operation of the unloading platform to avoid the danger of overloading caused by continuing to load materials onto the unloading platform, thereby ensuring the safe operation of the unloading platform; moreover, the structure is simple, and the modular structural design is more conducive to disassembly, transportation, and adaptation to unloading platforms of different occasions and sizes.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0055] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely means that the first feature has a lower horizontal height than the second feature.

[0057] In the present invention, terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0058] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A load stacking limit device for a cantilever unloading platform, characterized in that A plurality of weight sensors are evenly distributed between the material stacking bottom plate of the unloading platform and the bottom frame. The weight sensors are used to monitor the weight of the material stacked on the material stacking bottom plate in real time, and send the monitored weight of the material stacked on the material stacking bottom plate to the programmable logic controller, so as to control the movement of the load limiting device installed on the unloading platform by the programmable logic controller to cover the unloading platform; The load limiting device includes: a driving motor, a fixed slide rail, a moving slider, a covering tarpaulin and a driving chain; There are 2 fixed slide rails. The 2 fixed slide rails are detachably installed on the side guardrails of the unloading platform along the width direction of the unloading platform. One moving slider is installed in each fixed slide rail, and 2 fixed rings are installed on each moving slider; The two moving sliders are connected by a connecting rod. The connecting rod passes through one end of the covering tarpaulin close to the loading and unloading opening of the unloading platform, and the other end of the covering tarpaulin is fixedly connected to the rear guardrail of the unloading platform; The driving motor is installed on one of the fixed slide rails. A main driving wheel and a driven wheel are respectively installed at both ends of the fixed slide rail. The output end of the driving motor is connected to the main driving wheel installed on the corresponding fixed slide rail; The driving motor receives the control instruction of the programmable logic controller to move or stop; One driving chain is adaptively installed on each fixed slide rail. One end of the driving chain bypasses the main driving wheel on the corresponding fixed slide rail and is connected to one of the fixed rings on the corresponding moving slider. The other end of the driving chain bypasses the driven wheel on the corresponding fixed slide rail and is connected to the other fixed ring on the corresponding moving slider.

2. The load stacking limit device for the cantilever unloading platform according to claim 1, wherein, The fixed slide rail is a rectangular shell structure with openings at both ends, and waist-shaped slideways are provided on the side walls of the rectangular shell structure opposite to each other; Correspondingly, moving guide columns are respectively arranged on both end faces of the moving slider, and the moving guide columns are located in the waist-shaped slideways; And / or, A through threaded hole is further provided on the moving slider. The through threaded hole is coaxial with the moving guide column and is used for threadedly connecting the connecting rod.

3. The load stacking limiting device for the cantilever unloading platform according to claim 2, wherein, One end of the fixed slide rail where the driven wheel is installed is detachably connected with a positioning mounting plate, and a first bearing mounting hole is provided on the positioning mounting plate, Correspondingly, A second bearing mounting hole is provided on the side wall of the fixed slide rail, and the second bearing mounting hole is opposite to the first bearing mounting hole.

4. The load stacking limit device for a cantilever unloading platform according to claim 3, characterized in that, On the fixed slide rail, an installation groove is opened along the length direction of the fixed slide rail on the side wall opposite to the second bearing mounting hole; Correspondingly, the positioning mounting plate includes: an end cover plate and a bearing hole plate. The end cover plate is connected to the end face of the fixed slide rail, the bearing hole plate is perpendicular to the end cover plate and is inserted into the installation groove, and the first bearing mounting hole is provided on the bearing hole plate.

5. The load stacking limiting device for the cantilever unloading platform according to claim 4, characterized in that, Limiting grooves are respectively arranged on the upper and lower surfaces facing each other of the installation groove. Correspondingly, the bearing hole plate includes a first limiting part and a second limiting part. The first limiting part is in contact with the inner wall of the fixed slide rail, and the second limiting part is inserted into the limiting groove.

6. The load stacking limiting device for the cantilever unloading platform according to claim 4, characterized in that, An irregular pin shaft counterbore is arranged on the outer side wall of the bearing hole plate, and the pin shaft counterbore is coaxial with the first bearing installation hole.

7. The load stacking limit device for the cantilever unloading platform according to claim 1, characterized in that, The fixed slide rail is a split combined structure, including an end fixing section and a length adjusting section. A plurality of positioning installation holes are respectively arranged on the end faces where the end fixing section is connected to the length adjusting section, and positioning connecting pins are installed in the plurality of positioning installation holes.

8. The load stacking limiting device for the cantilever unloading platform according to claim 7, characterized in that, The length adjusting section includes buckling parts arranged symmetrically up and down. The cross section of the buckling part is U-shaped, and a plurality of the positioning installation holes are respectively arranged at both ends.

9. The load stacking limit device for a cantilever unloading platform according to any one of claims 1-8, characterized in that, The fixed slide rail is clamped on the side guardrail of the unloading platform through an elastic fastener; wherein, the upper surface of the elastic fastener is fixedly connected to the lower surface of the fixed slide rail, and a semi-closed buckle is arranged at the lower part of the elastic fastener to be clamped on the side guardrail.

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