A horizontal self-detecting function of stacker loading platform anti-falling device

Abstract

The present application provides a kind of with horizontal self-detection function's stacker loading platform anti-falling device, it is related to stacker safety protection equipment technical field, the present application is by being set up floating guide wheel structure, and by connecting rod mechanism and anti-falling device linkage cooperation, while supporting state detection switch, when loading platform appears horizontal deviation, exceed limited levelness threshold value, loading platform diagonal guide wheel stress uneven, guide wheel connecting rod is translated displacement, by connecting rod mechanical linkage trigger anti-falling device pre-braking action, while detection switch real-time capture connecting rod abnormal state and output alarm signal.To effectively improve the technical problem of the big security risk of traditional anti-falling structure, such as unable to detect the levelness of loading platform, only passive overspeed protection, hidden fault cannot be identified in advance, no overspeed limiter side hanging fracture cannot stimulate safety anti-falling device, high acceleration operating condition loading platform and column exist impact guide wheel vulnerable etc.

Description

Technical Field

[0001] This invention relates to the field of stacker crane safety protection equipment technology, specifically to a stacker crane loading platform anti-fall device with a horizontal self-detection function. Background Technology

[0002] Stacker cranes are the core storage and retrieval equipment of automated warehouses. As the core component of stacker cranes for carrying goods and realizing lifting and retrieval operations, the stability of the loading platform directly determines the safety of warehouse operations and the service life of the equipment. To prevent sudden falls during the lifting and lowering of the loading platform, existing stacker crane loading platforms are equipped with fall protection structures. The mainstream fall protection structure for loading platforms mainly consists of an overspeed limiter and two sets of symmetrically arranged fall protection devices. The overspeed limiter is installed and fixed at one end of the loading platform, and the two sets of fall protection devices are respectively installed at the left and right ends of the loading platform. The overspeed limiter is connected to the fall protection device on the same side, and the fall protection devices at both ends adopt a linkage structure design.

[0003] Existing anti-fall devices for stacker crane loading platforms suffer from several problems, including limited protection dimensions, lack of self-checking function for levelness, failure to trigger protection in case of single-sided hanging failure, inability to provide early warning of hidden faults, and lagging safety protection. Furthermore, the guide structure experiences impacts between the loading platform and the columns under high-frequency and high-acceleration operating conditions, which fails to meet the requirements of high-standard, high-safety, and high-stability automated warehousing operations.

[0004] Therefore, in view of the above situation, there is an urgent need to develop a stacker crane loading platform anti-fall device with horizontal self-detection function, so as to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] This invention provides a stacker crane loading platform anti-fall device with a self-leveling detection function to solve the above-mentioned technical problems, such as: traditional anti-fall structures cannot detect the levelness of the loading platform, can only passively protect against overspeed, cannot identify hidden faults in the suspension in advance, cannot activate the safety anti-fall device when the suspension on the side without an overspeed limiter breaks, and the loading platform and column are prone to damage due to impact guide wheels under high acceleration operation conditions.

[0006] To solve the above-mentioned technical problems, the present invention discloses a stacker crane loading platform anti-fall device with horizontal self-detection function, including stacker crane frame mechanism, speed limiting device, loading platform, anti-fall device, floating guide wheel, linkage structure, suspension transmission component and status detection switch;

[0007] The stacker crane frame mechanism is the main frame of the whole machine, used to fix the speed limiting device, hang the transmission components, and limit and guide the loading platform;

[0008] The loading platform is vertically raised and lowered along the stacker crane frame via a suspension transmission component. The speed limiting device is mounted on the loading platform and is connected to the fall protection device via a transmission connection.

[0009] The loading platform is equipped with floating guide wheels on both sides. A linkage structure is assembled between the floating guide wheels on the same side. The linkage structure is mechanically linked with the anti-fall device. Each linkage structure is matched with a status detection switch. The status detection switch is electrically connected to the stacker crane PLC main control system.

[0010] Preferably, the speed limiting device includes a speed limiter, a first transmission wire rope, and a steering wheel. One end of the first transmission wire rope is connected to the speed limiter, and the other end of the first transmission wire rope is fixed to the anti-fall device after passing through the steering wheel. The first transmission wire rope runs synchronously and vertically with the loading platform. When the loading platform exceeds the speed limit, the speed limiter locks and drives the anti-fall device through the first transmission wire rope to clamp the column guide rail of the stacker crane frame mechanism to achieve deceleration and anti-fall.

[0011] Preferably, the fall protection device includes a safety clamp, a transmission rod, a transmission wire rope, and another safety clamp. The first safety clamp and the first transmission rod are located at one end of the loading platform, and the second safety clamp and the second transmission rod are located at the other end of the loading platform. The first transmission rod is connected to the first transmission wire rope, and the first and second transmission rods are linked together through the second transmission wire rope. When the speed limiter is locked, the first transmission wire rope pulls the first transmission rod, which in turn pulls the second transmission rod synchronously. The first and second safety clamps on both sides simultaneously clamp the column guide rail.

[0012] Preferably, there are four sets of floating guide wheels, with two sets arranged on each of the left and right sides of the loading platform body. Each set of floating guide wheels includes a support, a floating tension structure, a rotating shaft, a guide wheel frame, a guide wheel, and a connecting shaft. The guide wheel frame is rotatably assembled with the support through the rotating shaft. The floating tension structure adaptively adjusts the contact pressure between the guide wheel and the guide rail, adapting to changes in the spacing between the column and the guide rail in real time.

[0013] Preferably, the two sets of floating guide wheels on the same side are connected by a linkage structure, which includes a guide wheel connecting rod, a fixed shaft, a swing plate, and an adjusting plate. The two ends of the guide wheel connecting rod are respectively connected to the connecting shafts of the two sets of floating guide wheels. The middle part of the guide wheel connecting rod is assembled to the fixed shaft. The swing plate is hinged on the fixed shaft. An adjusting plate is fixedly installed on the outside of the swing plate.

[0014] Preferably, when the two sets of floating guide wheels on the same side are subjected to uneven force, the loading platform tilts horizontally, or the guide rail spacing deviates, the guide wheel connecting rod drives the swing plate to generate a corresponding angle of swing displacement around the fixed axis. The amount of swing displacement of the swing plate is positively correlated with the horizontal deviation value of the loading platform and the guide rail spacing deviation value. The adjustment plate is used to limit the drive engagement clearance between the swing plate and the anti-fall device.

[0015] Preferably, the status detection switch is a non-contact inductive switch, which is fixedly installed on the loading platform body, with the sensing probe facing the swing stroke area of ​​the swing plate; the stacker crane PLC main control system has a preset threshold range for the swing plate to rotate.

[0016] Preferably, when the loading platform tilts horizontally or a single-sided suspension transmission component breaks, causing the offset of the floating guide wheels on both sides to exceed a preset threshold, the swing plate swings to trigger the status detection switch. The status detection switch sends an alarm signal to the PLC main control system, and the main control system immediately locks the stacker crane's lifting and lowering operation.

[0017] Preferably, when a single-sided suspension transmission component breaks down, or when overspeeding occurs at only one end, causing the speed limiting device to fail to trigger, the loading platform will tilt horizontally. The floating guide wheel linkage structure will drive the swing plate to swing, simultaneously triggering the status detection switch to alarm and stop the machine, thus compensating for the protection deficiency that a single speed limiting device can only deal with synchronous overspeeding.

[0018] Preferably, the stacker crane frame mechanism is provided with a vertical column guide rail on the inner side, and the guide wheel of the floating guide wheel is always in contact with the vertical surface of the column guide rail. The four sets of floating guide wheels, together with the linkage structure, collect the difference in horizontal force on the left and right sides of the loading platform in real time, so as to realize the continuous self-detection of the levelness of the loading platform and the change of the guide rail spacing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Breaking through the limitations of traditional protection, adding a levelness self-checking function: This invention abandons the single protection mode of traditional fall protection devices that rely solely on overspeed braking. Through the cooperation of floating guide wheels and linkage structure, the status of the four corner guide wheels of the loading platform can be monitored in real time, and the levelness deviation of the loading platform can be fed back. This achieves fully automatic and real-time self-detection of the levelness of the loading platform, filling the technical gap of existing equipment without levelness detection.

[0021] 2. Enables early warning of hidden faults, providing more proactive protection: It can identify some hidden faults such as fatigue, wear, uneven tension, and minor damage to the hanging components that cause the loading platform to tilt. It can trigger an early warning when there is no risk of falling at excessive speed, so as to check the fault in advance and avoid the accumulation of small faults leading to major safety accidents, thus completely solving the problem of lagging protection in traditional equipment.

[0022] 3. Multiple protection modes greatly improve safety factor: This invention has a combination of track spacing adaptive, level abnormality active protection, overall speed abnormality passive protection and single-sided suspension transmission component [7] fracture protection mechanism, which can not only avoid the problem of cargo falling and equipment high acceleration and deceleration impact damage caused by the tilt of the loading platform in advance, but also cope with the extreme failure of sudden breakage of the overall or single-sided suspension components and overspeed fall, and comprehensively protect the safety of the loading platform operation.

[0023] 4. Simple and stable structure with strong adaptability: This invention adopts a combination structure of pure mechanical linkage and electrical detection, without complex electrical control algorithms, with low failure rate and high reliability. It can be directly adapted to the existing conventional stacker crane loading platform structure, with low modification difficulty and low cost, and wide applicability.

[0024] 5. Reduce equipment operation and maintenance costs: By providing early warnings of levelness of the loading platform and failure of hanging components, damaged parts can be repaired or replaced in a timely manner, avoiding secondary losses such as guide rail wear, equipment deformation, and cargo damage caused by long-term unbalanced operation of the loading platform. This significantly reduces equipment failure rate and operation and maintenance costs, and improves the continuity and stability of automated warehousing operations. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation of the speed limiting device of the present invention;

[0028] Figure 3 These are the left and right views of the cargo platform structure in this invention;

[0029] Figure 4 This is a schematic diagram of the floating guide wheel structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the linkage structure installation of the present invention.

[0031] In the diagram: 1. Stacker crane frame mechanism; 2. Speed ​​limiting device; 2.1 Speed ​​limiter; 2.2 Transmission wire rope one; 2.3 Steering wheel; 3. Loading platform; 4. Fall protection device; 4.1 Safety clamp one; 4.2 Transmission rod one; 4.3 Transmission wire rope two; 4.4 Safety clamp two; 4.5 Transmission rod two; 5. Floating guide wheel; 5.1 Support; 5.2 Floating tension structure; 5.3 Rotating shaft; 5.4 Guide wheel frame; 5.5 Guide wheel; 5.6 Connecting shaft; 6. Linkage structure; 6.1 Guide wheel connecting rod; 6.2 Fixed shaft; 6.3 Swing plate; 6.4 Adjusting plate; 7. Suspension transmission components; 8. Status detection switch. Detailed Implementation

[0032] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0033] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] The present invention provides the following embodiments:

[0035] Example 1

[0036] This invention provides a stacker crane loading platform anti-fall device with a horizontal self-detection function, such as... Figure 1 As shown, it includes a stacker crane frame mechanism 1, a speed limiter 2, a loading platform 3, a fall arrestor 4, a floating guide wheel 5, a linkage structure 6, a suspension transmission component 7, and a status detection switch 8;

[0037] The stacker crane frame mechanism 1 is the main frame of the whole machine, used to fix the speed limiting device 2, hang the transmission components 7, and limit and guide the loading platform 3;

[0038] The loading platform 3 is vertically raised and lowered along the stacker crane frame mechanism 1 via the suspension transmission component 7. The speed limiting device 2 is mounted on the loading platform 3 and is connected to the anti-fall device 4 in a transmission manner.

[0039] The loading platform 3 has floating guide wheels 5 on both sides of its main body. A linkage structure 6 is assembled between the floating guide wheels 5 on the same side. The linkage structure 6 is mechanically linked with the anti-fall device 4. Each linkage structure 6 is matched with a status detection switch 8. The status detection switch 8 is electrically connected to the stacker crane PLC main control system.

[0040] The beneficial effects of the above technical solution are as follows: This invention sets up four sets of floating rotating guide wheels on the loading platform. Two sets of guide wheels on each side are connected by a linkage rod. The middle part of the linkage rod is linked with the anti-fall devices at both ends of the loading platform, and a linkage status detection switch is also provided. When the loading platform deviates horizontally and exceeds the limit of horizontality threshold, the diagonal guide wheels of the loading platform are subjected to uneven force, causing the guide wheel connecting rod to undergo translational displacement. This triggers the pre-braking action of the anti-fall device through mechanical linkage of the linkage. At the same time, the detection switch captures the abnormal status of the linkage in real time and outputs an alarm signal. This effectively improves the technical problems of traditional anti-fall structures, such as the inability to detect the horizontality of the loading platform, only passive overspeed protection, inability to identify hidden faults in the suspension in advance, failure of the suspension on the side without an overspeed limiter to trigger the safety anti-fall device when the suspension breaks, and the easy damage of the guide wheels due to impact between the loading platform and the column under high acceleration operation conditions. This achieves real-time self-inspection of the horizontality of the loading platform, active early warning of abnormalities, and dual braking protection against faults, thus avoiding safety accidents such as loading platform tilting, cargo falling, and suspension component breakage in advance.

[0041] Example 2

[0042] Based on Example 1, such as Figure 1-5 As shown, a stacker crane loading platform anti-fall device with horizontal self-detection function is disclosed. The speed limiting device 2 includes a speed limiter 2.1, a transmission wire rope 2.2, and a steering wheel 2.3. One end of the transmission wire rope 2.2 is connected to the speed limiter 2.1, and the other end of the transmission wire rope 2.2 is fixed to the anti-fall device 4 after passing through the steering wheel 2.3. The transmission wire rope 2.2 runs synchronously and vertically with the loading platform 3. When the loading platform 3 exceeds the speed limit, the speed limiter 2.1 locks and drives the anti-fall device 4 through the transmission wire rope 2.2 to clamp the column guide rail of the stacker crane frame mechanism 1 to achieve deceleration and anti-fall.

[0043] Optionally, the fall arrestor 4 includes a safety clamp 4.1, a transmission rod 4.2, a transmission wire rope 4.3, a safety clamp 4.4, and a transmission rod 4.5. The safety clamp 4.1 and transmission rod 4.2 are located at one end of the loading platform 3, and the safety clamp 4.4 and transmission rod 4.5 are located at the other end of the loading platform 3. The transmission rod 4.2 is connected to the transmission wire rope 2.2, and the transmission rod 4.2 and transmission rod 4.5 are linked by the transmission wire rope 4.3. When the speed limiter 2.1 is locked, the transmission wire rope 2.2 pulls the transmission rod 4.2, which in turn pulls the transmission rod 4.5 through the transmission wire rope 4.3. At the same time, the safety clamps 4.1 and 4.4 on both sides clamp the column guide rail.

[0044] Optionally, the floating guide wheels 5 are provided in four sets, with two sets arranged on each of the left and right sides of the loading platform 3. Each set of floating guide wheels 5 includes a support 5.1, a floating tension structure 5.2, a rotating shaft 5.3, a guide wheel frame 5.4, a guide wheel 5.5, and a connecting shaft 5.6. The guide wheel frame 5.4 is rotatably assembled with the support 5.1 through the rotating shaft 5.3. The floating tension structure 5.2 adaptively adjusts the contact pressure between the guide wheel 5.5 and the guide rail, adapting to changes in the spacing between the column and the guide rail in real time.

[0045] Optionally, two sets of floating guide wheels 5 on the same side are connected by a linkage structure 6. The linkage structure 6 includes a guide wheel connecting rod 6.1, a fixed shaft 6.2, a swing plate 6.3, and an adjusting plate 6.4. The two ends of the guide wheel connecting rod 6.1 are respectively connected to the connecting shafts 5.6 of the two sets of floating guide wheels 5. The middle part of the guide wheel connecting rod 6.1 is assembled to the fixed shaft 6.2. The swing plate 6.3 is hinged to the fixed shaft 6.2. The adjusting plate 6.4 is fixed on the outside of the swing plate 6.3.

[0046] Optionally, when the two sets of floating guide wheels 5 on the same side are subjected to uneven force, the loading platform 3 tilts horizontally, or the guide rail spacing shifts, the guide wheel connecting rod 6.1 drives the swing plate 6.3 to generate a corresponding angle of swing displacement around the fixed axis 6.2. The amount of swing displacement of the swing plate 6.3 is positively correlated with the horizontal deviation value of the loading platform 3 and the guide rail spacing deviation value. The adjusting plate 6.4 is used to limit the driving engagement clearance between the swing plate 6.3 and the anti-fall device 4.

[0047] Optionally, the status detection switch 8 is a non-contact inductive switch. The status detection switch 8 is fixedly installed on the loading platform 3 body, and the sensing probe is directly facing the swing stroke area of ​​the swing plate 6.3. The stacker crane PLC main control system has a preset allowable rotation threshold range for the swing plate 6.3.

[0048] Optionally, when the loading platform 3 tilts horizontally or the single-sided suspension transmission component 7 breaks, causing the offset of the floating guide wheels 5 on both sides to exceed the preset threshold, the swing plate 6.3 swings to trigger the status detection switch 8. The status detection switch 8 sends an alarm signal to the PLC main control system, and the main control system immediately locks the stacker crane's lifting and lowering operation.

[0049] Optionally, if the single-sided suspension transmission component 7 breaks and the speed limiter 2 fails to be triggered due to overspeed at only one end, the loading platform 3 will tilt horizontally. The floating guide wheel 5 and the linkage structure 6 will drive the swing plate 6.3 to swing, and the status detection switch 8 will be triggered synchronously to alarm and stop the machine, thus making up for the protection defect that the single speed limiter 2 can only deal with synchronous overspeed.

[0050] Optionally, the stacker crane frame mechanism 1 is provided with a vertical column guide rail on the inner side. The guide wheel 5.5 of the floating guide wheel 5 is always in contact with the vertical surface of the column guide rail. The four sets of floating guide wheels 5, together with the linkage structure 6, collect the difference in horizontal force on the left and right sides of the loading platform 3 in real time, so as to realize the continuous self-detection of the levelness of the loading platform 3 and the change of the guide rail spacing.

[0051] The working principle of the above technical solution is as follows: Under normal operating conditions: the level of the loading platform 3 meets the standard, the four corner floating guide wheels 5 are evenly stressed, the horizontal linkage and vertical linkage are in the initial neutral position without offset displacement, the detection switch has no signal output, the anti-fall device 4 is in standby state, and the loading platform 3 is in normal lifting operation.

[0052] Track spacing error adaptive state: When there is an error in the spacing between the columns of the stacker crane frame mechanism 1, the floating guide wheels 5 on both sides of the horizontal loading platform 3 adjust the angle of the guide wheel frame 5.4 in real time according to the changes in the track under the pressure of the floating tension structure 5.2, maintain full contact with the track, avoid the impact between the loading platform 3 and the columns of the stacker crane frame mechanism 1, the pairs of guide wheels on each side rotate symmetrically, the tension of the floating tension structure 5.2 cancels each other out, the state of each group of linkage structure 6 does not change, the anti-fall device 4 does not work, and the state detection switch 8 has no signal output;

[0053] Levelness Anomaly Early Warning and Prevention: When the loading platform 3 experiences level deviation or exceeds the preset limit due to damage or uneven tension of the suspension transmission component 7, the pressure on the two sets of floating guide wheels 5 at the diagonal positions of the loading platform 3 increases significantly, while the pressure on the other two sets of diagonal floating guide wheels 5 decreases, creating a force difference. This force difference causes the floating guide wheels 5 to rotate and shift, and the floating guide wheels 5 on the same side rotate in the same direction, driving the guide wheel connecting rod 6.1 to move vertically and driving the swing plate 6.3 to rotate and swing. When the displacement change exceeds the alarm threshold, the status detection switch 8 is triggered, and the equipment stops operating in time to avoid secondary damage. At the same time, the status detection switch 8 outputs an abnormal alarm signal to remind maintenance personnel to check for faults in the suspension components, realizing early warning of hidden faults and preventing the fault from escalating.

[0054] Overall overspeed emergency anti-fall status: When the loading platform 3 experiences overall overspeed fall, the speed limiting device 2 is activated after sensing that the running speed exceeds the limit threshold. It synchronously drives the anti-fall devices 4 at both ends to forcefully clamp the guide rail, and quickly reduces the falling speed of the loading platform 3 through friction braking until it is locked and stationary, thus preventing the loading platform 3 from falling as a whole.

[0055] Emergency protection against fall due to breakage of single-sided suspended transmission component 7: In the event of an extreme failure where the suspended transmission component 7 on either side suddenly breaks, when the level of the loading platform 3 suddenly exceeds the preset limit, the pressure on the two sets of floating guide wheels 5 at the diagonal positions of the loading platform 3 increases significantly, while the pressure on the other two sets of diagonal floating guide wheels 5 decreases, creating a force difference. This force difference causes the floating guide wheels 5 to rotate and shift, and the floating guide wheels 5 on the same side rotate in the same direction, driving the guide wheel connecting rod 6.1 to move vertically, driving the swing plate 6.3 to rotate and swing. Through mechanical lifting linkage, the fall protection device 4 is triggered to forcefully clamp the guide rail, and the falling speed of the loading platform 3 is quickly reduced through friction braking until it is locked and stationary, preventing the loading platform 3 from falling on one side. At the same time, if the rotational displacement of the swing plate 6.3 exceeds the alarm threshold, the status detection switch 8 is triggered, and the equipment stops operating in time to avoid secondary damage. At the same time, the status detection switch 8 outputs an abnormal alarm signal to remind maintenance personnel to deal with the fault in time.

[0056] The beneficial effects of the above technical solution are as follows: This device, by setting up a speed limiter 2, an overspeed braking mechanism, and a horizontal offset linkage protection mechanism, when the entire loading platform 3 falls synchronously due to overspeed, relies on the speed limiter 2.1 to link the safety clamps on both sides to synchronously clamp the column guide rail to achieve braking. If only one side of the suspension transmission component 7 breaks, the loading platform 3 falls on one side, or the single speed limiter 2 cannot recognize the braking, the anti-fall device 4 can be triggered by the mechanical linkage of the floating guide wheel 5 and the linkage structure 6 to lock in an emergency. This makes up for the major safety defects of traditional methods that rely solely on speed limiter protection and fail due to single-sided rope breakage. At the same time, it takes into account the two extreme failure conditions of overall overspeed and single-sided fall, and comprehensively avoids the safety accident of loading platform falling.

[0057] The four sets of floating guide wheels 5 are equipped with a floating tension structure 5.2 and a rotatable guide wheel frame 5.4, which can adapt to the spacing processing error and installation deviation of the column guide rail of the stacker crane frame mechanism 1. The guide wheels 5.5 are kept in close contact with the guide rail surface throughout the process, and there will be no problem of separation or jamming due to changes in the width of the rail. The force difference between the two guide wheels is directly converted into the swing displacement of the swing plate 6.3, which can provide real-time and continuous feedback on the horizontal tilt of the loading platform 3. The signal acquisition is stable and highly sensitive, and is not affected by the manufacturing and installation tolerances of the guide rail.

[0058] This invention achieves a purely mechanical hard linkage between horizontal deviation and the anti-fall device 4 through the linkage structure 6. It can still independently complete braking protection when the power is off or the control system fails. At the same time, it is equipped with a non-contact status detection switch 8 to monitor the deviation of the swing plate 6.3 in real time. When the horizontal deviation of the loading platform 3 just exceeds the threshold and before a fall accident occurs, it can send an alarm signal to the PLC main control system and lock the equipment operation. It provides early warning of hidden faults such as uneven tension and wear and cracking of the hanging transmission components 7, and avoids the continuous deterioration of small faults, which may lead to major secondary damage such as platform fall, cargo damage, and frame impact. This significantly reduces operation and maintenance and equipment repair costs.

[0059] This invention employs a symmetrical arrangement of safety clamp 41 and safety clamp 44.4 in the fall arrestor device 4, and relies on the transmission wire rope 43 to achieve synchronous linkage of the transmission rods at both ends. During overspeed braking, the safety clamps on both sides simultaneously clamp the column guide rail, and the loading platform 3 is subjected to uniform force on both sides. During the braking process, there is no one-sided load or local squeezing and wear of the guide rail, which avoids the problems of loading platform tilting and guide rail deformation caused by one-sided clamping, and extends the service life of the frame, loading platform and safety clamps.

[0060] This invention, by setting an adjustment plate 6.4 on the linkage structure 6, can flexibly adjust the drive engagement clearance between the swing plate 6.3 and the anti-fall device 4. It can customize the allowable deviation threshold of the loading platform level according to different loads and different floor heights of stacker cranes, and adapt to the modification of loading platforms of light, medium and heavy-duty stacker cranes and new machines. Parameter adaptation can be completed without replacing the entire set of guide and linkage components, and it has a wide range of applications.

[0061] This invention integrates the speed limiting device 2, floating guide wheel 5, linkage structure 6, and status detection switch 8 onto the main body of the loading platform 3, without requiring additional space inside the aisle. The overall modular assembly structure allows it to be directly installed on the existing conventional aisle stacker crane lifting loading platform without significantly altering the original stacker crane frame or lifting transmission system. The safety upgrade and renovation of old warehouse stacker cranes is simple and cost-effective.

[0062] This invention uses a non-contact inductive switch for the status detection switch 8, which eliminates mechanical contact friction. The vibration generated by the long-term high-speed lifting and lowering of the stacker crane and the dusty environment of the warehouse will not cause the switch to jam or wear and fail. Compared with mechanical contact limit switches, the failure rate is lower, the signal recognition is accurate under long-term storage conditions, and the equipment operates stably and reliably.

[0063] In this invention, the floating tension structure 5.2 can dynamically buffer the compressive stress caused by the guide rail spacing error. During the normal lifting and lowering of the loading platform 3, the guide wheel 5.5 always flexibly fits the guide rail, eliminating hard friction and impact noise between the guide wheel and the column, reducing the overall operating noise, and at the same time reducing the long-term wear of the guide wheel, column and guide rail, extending the daily service life of the equipment.

[0064] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A stacker crane loading platform anti-fall device with horizontal self-detection function, characterized in that: It includes the stacker crane frame mechanism (1), speed limiter (2), loading platform (3), anti-fall device (4), floating guide wheel (5), linkage structure (6), suspension transmission component (7) and status detection switch (8); The stacker crane frame mechanism (1) is the main frame of the whole machine, used to fix the speed limiting device (2), hang the transmission components (7), and limit and guide the loading platform (3); The loading platform (3) is vertically raised and lowered along the stacker frame mechanism (1) via a suspension transmission component (7). The speed limiting device (2) is mounted on the loading platform (3) and is connected to the anti-fall device (4) in a transmission manner. The loading platform (3) has floating guide wheels (5) on both sides of its main body. A linkage structure (6) is assembled between the floating guide wheels (5) on the same side. The linkage structure (6) is mechanically linked with the anti-fall device (4). Each linkage structure (6) is matched with a status detection switch (8). The status detection switch (8) is connected to the electrical signal of the stacker crane PLC main control system.

2. The anti-fall device for a stacker crane loading platform with horizontal self-detection function according to claim 1, characterized in that: The speed limiting device (2) includes a speed limiter (2.1), a transmission wire rope (2.2), and a steering wheel (2.3). One end of the transmission wire rope (2.2) is connected to the speed limiter (2.1), and the other end of the transmission wire rope (2.2) is fixed to the anti-fall device (4) after passing through the steering wheel (2.3). The transmission wire rope (2.2) runs synchronously and vertically with the loading platform (3). When the loading platform (3) exceeds the speed limit, the speed limiter (2.1) locks and drives the anti-fall device (4) through the transmission wire rope (2.2) to clamp the column guide rail of the stacker crane frame mechanism (1) to achieve deceleration and anti-fall.

3. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 2, characterized in that: The fall arrestor (4) includes a safety clamp (4.1), a transmission rod (4.2), a transmission wire rope (4.3), a safety clamp (4.4), and a transmission rod (4.5). The safety clamp (4.1) and transmission rod (4.2) are located at one end of the loading platform (3), and the safety clamp (4.4) and transmission rod (4.5) are located at the other end of the loading platform (3). The transmission rod (4.2) is connected to the transmission wire rope (2.2), and the transmission rod (4.2) and transmission rod (4.5) are linked by the transmission wire rope (4.3). When the speed limiter (2.1) is locked, the transmission wire rope (2.2) pulls the transmission rod (4.2), and the transmission wire rope (4.3) simultaneously pulls the transmission rod (4.5). The safety clamps (4.1) and safety clamps (4.4) on both sides clamp the column guide rail at the same time.

4. The anti-fall device for a stacker crane loading platform with horizontal self-detection function according to claim 1, characterized in that: The floating guide wheels (5) are provided in four sets, with two sets arranged on each of the left and right sides of the loading platform (3). Each set of floating guide wheels (5) includes a support (5.1), a floating tension structure (5.2), a rotating shaft (5.3), a guide wheel frame (5.4), a guide wheel (5.5), and a connecting shaft (5.6). The guide wheel frame (5.4) is rotated and assembled with the support (5.1) through the rotating shaft (5.3). The floating tension structure (5.2) adaptively adjusts the contact pressure between the guide wheel (5.5) and the guide rail, adapting to the changes in the spacing between the column and the guide rail in real time.

5. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 4, characterized in that: Two sets of floating guide wheels (5) on the same side are connected by a linkage structure (6). The linkage structure (6) includes a guide wheel connecting rod (6.1), a fixed shaft (6.2), a swing plate (6.3), and an adjusting plate (6.4). The two ends of the guide wheel connecting rod (6.1) are respectively connected to the connecting shafts (5.6) of the two sets of floating guide wheels (5). The middle part of the guide wheel connecting rod (6.1) is assembled on the fixed shaft (6.2). The swing plate (6.3) is hinged on the fixed shaft (6.2). An adjusting plate (6.4) is fixedly installed on the outside of the swing plate (6.3).

6. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 5, characterized in that: When the two sets of floating guide wheels (5) on the same side are subjected to uneven force, the loading platform (3) tilts horizontally or the guide rail spacing deviates, the guide wheel connecting rod (6.1) drives the swing plate (6.3) to generate a corresponding angle of swing displacement around the fixed axis (6.2). The amount of swing displacement of the swing plate (6.3) is positively correlated with the horizontal deviation value of the loading platform (3) and the guide rail spacing deviation value. The adjusting plate (6.4) is used to limit the driving cooperation gap between the swing plate (6.3) and the anti-fall device (4).

7. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 5, characterized in that: The status detection switch (8) is a non-contact induction switch. The status detection switch (8) is fixedly installed on the body of the loading platform (3). The induction probe is directly facing the swing stroke area of ​​the swing plate (6.3). The stacker crane PLC main control system has a preset allowable rotation threshold range for the swing plate (6.3).

8. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 7, characterized in that: When the loading platform (3) tilts horizontally and the single-sided hanging transmission component (7) breaks, causing the offset of the floating guide wheels (5) on both sides to exceed the preset threshold, the swing plate (6.3) swings to trigger the status detection switch (8). The status detection switch (8) sends an alarm signal to the PLC main control system, and the main control system immediately locks the stacker crane lifting operation.

9. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 3, characterized in that: When a single-sided suspension transmission component (7) breaks and the speed limiter (2) fails to be triggered due to overspeed at only one end, the loading platform (3) will tilt horizontally. The floating guide wheel (5) and the linkage structure (6) will drive the swing plate (6.3) to swing, which will trigger the status detection switch (8) to alarm and stop the machine, thus making up for the protection defect that the single speed limiter (2) can only deal with synchronous overspeed.

10. A stacker crane loading platform anti-fall device with horizontal self-detection function according to claim 1, characterized in that: The stacker frame mechanism (1) is provided with a vertical column guide rail on the inner side. The guide wheel (5.5) of the floating guide wheel (5) is always in contact with the vertical surface of the column guide rail. The four sets of floating guide wheels (5) cooperate with the linkage structure (6) to collect the difference in horizontal force on the left and right sides of the loading platform (3) in real time, so as to realize the continuous self-detection of the levelness of the loading platform (3) and the change of the guide rail spacing.

Images