Testing bench

Abstract

This application relates to a testing bench, including a safety lock testing device. The safety lock testing device includes: a frame, which includes a base and a top frame; and a counterweight. The safety lock testing device further includes: a trolley; a tilting frame; and a guide rope. The upper end of the guide rope is fixed to the trolley, and the lower end of the guide rope is fixed to the tilting frame. The safety lock testing device can switch between a retracted state and a testing state. In the retracted state, the trolley slides to a retracted position inside the frame, and the tilting frame tilts to a folded position inside the frame. In the testing state, the trolley slides to an extended position extending from the frame, and the tilting frame tilts to an unfolded position, and the guide rope is taut vertically in the testing state. This provides a compact and lightweight testing bench.

Description

Technical Field

[0001] This application relates to a testing bench, and more particularly to a testing bench that includes a safety lock testing device capable of testing safety locks. Background Technology

[0002] In the construction industry, vertical transportation equipment such as elevators and suspended platforms are key to ensuring construction efficiency. With the continuous increase in building height and the growing complexity of construction processes, the safety performance of these devices directly affects the lives of construction workers and the progress of the project. Safety locks and safety devices, as crucial safety protection devices within these systems, directly determine the equipment's safety assurance capabilities under sudden and dangerous conditions through their technological development.

[0003] A safety lock is a mechanical or mechatronic device installed near the suspension mechanism (hoist) of a suspended platform or on an independent support. Its main function is to automatically trigger and lock onto the safety rope instantly when the suspended platform experiences an abnormal fall or excessive descent due to some reason (such as a broken traction rope, a malfunctioning hoist, or an excessive tilt angle). This prevents the platform from falling and protects the lives of personnel working on the platform. Safety locks can be classified into two types according to their working principle: swing-arm anti-tilt type and centrifugal trigger type. The swing-arm anti-tilt type safety lock has a rope angle detection mechanism. When the suspended platform tilts or the traction rope breaks or slackens, the rope angle detection mechanism changes its angle, driving the actuator to activate the rope locking mechanism and lock the platform. For the centrifugal trigger type safety lock, when the platform's descent speed exceeds a certain value, the centrifugal force generated by the flyblock overcomes the spring's constraint force and throws outwards to a certain extent, triggering the waiting actuator to activate the rope locking mechanism and lock the lock block onto the safety rope.

[0004] The safety device, also known as a fall arrestor, is the most important safety feature on rack and pinion construction hoists. It limits the cage's descent speed to prevent falls. The fall arrestor mainly consists of a brake gear, a centrifugal speed limiter, a braking mechanism, and a loading mechanism. The brake gear meshes with the rack of the hoist's guide rail, and the speed limiter detects the hoist's operating speed. When the hoist's speed reaches the safety device's activation speed, the centrifugal block in the speed limiter opens, causing the braking mechanism to rotate and generate braking force. During braking, the braking force gradually increases under the action of the loading mechanism until the protected target stops falling.

[0005] With the rapid development of the construction industry, the performance requirements for safety locks and safety devices are becoming increasingly stringent. Relevant safety standards and regulations clearly stipulate that these safety devices must be inspected and calibrated regularly to ensure their performance meets safety requirements. For example, the construction industry standard GB / T34025 "Gear-type Progressive Fall Arrestor Safety Device for Construction Hoists" stipulates that fall arrestor safety devices for construction hoists can only be used within their valid inspection period, which shall not exceed one year. GB / T19155 "Suspended Platforms for High-Altitude Operations" stipulates that the periodic inspection cycle for safety locks is one year. Construction site environments are complex and changeable, and equipment is used frequently, making safety locks and safety devices susceptible to performance degradation due to various factors. Therefore, it is necessary to regularly inspect these safety devices to ensure they are always in good working order, thereby guaranteeing the safety of the construction site. However, traditional testing equipment is bulky, heavy, and difficult to move, making it unsuitable for inspecting safety locks and safety devices on construction sites. Moreover, the testing of safety locks and safety devices requires two completely different sets of testing equipment, resulting in high testing costs. Summary of the Invention

[0006] The purpose of this application is to provide a testing bench that can be used to test security locks, which is significantly smaller, lighter and easier to move than traditional testing equipment.

[0007] One aspect of this application is to provide a testing bench including a safety lock testing device for testing safety locks. The safety lock testing device includes: a frame including a base and a top frame; and a counterweight suspended from the frame by means of a traction rope and capable of being lifted by means of a lifting device, wherein the safety lock to be tested can be mounted on the counterweight. The safety lock detection device further includes: a trolley slidably supported on the top frame of the frame; a tilting frame rotatably supported on the base of the frame; and a guide rope passing through the counterweight to guide it, wherein the upper end of the guide rope is fixed to the trolley and the lower end of the guide rope is fixed to the tilting frame, wherein the safety lock detection device can switch between a retracted state and a detection state, wherein: in the retracted state, the trolley slides to a retracted position inside the frame and the tilting frame tilts to a folded position inside the frame; in the detection state, the trolley slides to an extended position extending from the frame and the tilting frame tilts to an unfolded position folded out from the frame, and the guide rope is taut in the vertical direction in the detection state, thereby enabling the detection of the safety lock.

[0008] Here, the counterweight acts as a simulation of a lift, cage, or suspended platform. In traditional testing equipment, a fixed guide rail is typically required to guide the counterweight's stable up-and-down movement. However, such a fixed guide rail results in a very high testing device, and the rail is usually made of heavy steel, leading to a bulky and cumbersome overall setup. Such testing equipment is unsuitable for mobility and is therefore typically located in a fixed testing area. Testing safety locks or safety devices requires transporting them from the construction site to the testing location and then back again after testing, which is extremely cumbersome. In this testing bench, the fixed guide rails used to guide the counterweight are eliminated. Instead, flexible guide ropes are used for the counterweight. The upper and lower ends of the guide ropes are fixed to a sliding trolley and a tilting frame, respectively. Thus, when the trolley slides to its retracted position inside the frame and the tilting frame tilts to its folded position inside the frame, the testing bench is in a retracted state. The guide ropes are also retracted into the frame and are no longer taut, eliminating the need for guiding the counterweight. In this retracted state, the testing bench occupies a smaller volume. Because guide ropes replace fixed guide rails, this testing bench is lightweight and easy to move, making it suitable for transport to the required construction site. When the trolley slides to the extended position from the frame and the tilting frame flips to the unfolded position from the frame, the guide rope is taut in the vertical direction under the detection state. At this time, the guide rope functions as a guide rail for the counterweight, so that the counterweight can move up and down reliably and stably along the guide rope.

[0009] Optionally, the safety lock detection device further includes a safety rope, the upper end of which is fixed to the pulley and the lower end of which can pass through the safety lock to be detected. When the counterweight falls at excessive speed, the safety lock can be triggered, causing the safety lock to lock onto the safety rope.

[0010] Optionally, the safety lock detection device further includes a pressure sensor arranged on the trolley, the upper end of the safety rope being fixed to the trolley via the pressure sensor, wherein the pressure sensor is used to measure the braking force of the safety lock when detecting the safety lock.

[0011] Optionally, the safety lock detection device further includes a safety rope locking device, the lower end of which can be fixed to the tilting frame by means of the safety rope locking device.

[0012] Optionally, the safety lock detection device further includes a shock-absorbing device arranged on the tilting frame. This shock-absorbing device cushions the falling counterweight when the safety lock fails. When the safety lock fails and causes the counterweight to continue falling, the shock-absorbing device cushions the fall, preventing damage to the counterweight and even the entire testing platform. Optionally, the shock-absorbing device is formed by a spring fitted onto the guide rope.

[0013] Optionally, the safety lock detection device further includes a displacement sensor arranged on the trolley, the displacement sensor being used to measure the braking distance of the safety lock when detecting the safety lock.

[0014] Optionally, the displacement sensor is a wire displacement sensor, with the free end of the wire fixed to the counterweight. This allows for a simple measurement of the braking distance of the safety lock.

[0015] Optionally, a slide rail is arranged on the top frame of the frame, and the trolley is slidably supported on the top frame of the frame by means of the slide rail.

[0016] Optionally, a trolley limiting member is arranged on the top frame of the frame, which limits the storage position and sliding position of the trolley and / or prevents the trolley from tipping over.

[0017] Optionally, the traction rope connects the counterweight to the lifting device via a pulley block, the pulley block including at least one fixed pulley and one movable pulley, wherein the fixed pulley is fixed on the trolley above the counterweight, and the movable pulley is supported in a movable pulley guide device that can move horizontally by means of a movable pulley connector, the movable pulley guide device being fixed on the trolley or the top frame.

[0018] Optionally, the safety lock detection device further includes a disengagement mechanism, comprising a hook pin fixed to the movable pulley connector; a hook connector; a hook hinged to the hook connector and pre-tensioned by a tension spring, such that when the hook moves toward and collides with the hook pin, the hook pin can engage the hook; a disengagement mechanism drive device capable of moving the hook horizontally toward or away from the hook pin via the hook connector; and a trigger pin located in the movement path of the hook, such that when the hook is moved to contact the trigger pin, the hook pivots under the driving force of the disengagement mechanism drive device, overcoming the pre-tension force of the tension spring, thereby disengaging the hook from the hook pin. Optionally, the trigger pin is arranged on the movable pulley guide device. Optionally, the disengagement mechanism drive device is fixed to the trolley or the top frame.

[0019] In traditional testing equipment, the unhooking mechanism typically operates vertically, requiring the entire testing equipment to occupy a significant vertical height, resulting in a bulky and heavy device that is difficult to transport. The aforementioned arrangement of the pulley system and the unhooking mechanism allows the unhooking mechanism to operate horizontally, thereby significantly reducing the height of the testing platform. Furthermore, the entire unhooking mechanism is concealed within the frame, increasing the compactness of the testing platform.

[0020] Optionally, the safety lock detection device further includes an actuation device. When the hook pin is engaged with the hook, and the hook is moved to contact the trigger pin, the actuation device is compressed by the movable pulley or the movable pulley connector. This allows the actuation device to eject the movable pulley and the movable pulley connector when the hook disengages from the hook pin. Optionally, the actuation device is formed by a spring. When the hook disengages from the hook pin, the actuation device ejects the movable pulley and the movable pulley connector, causing the traction rope used to pull the counterweight to immediately slacken. Optionally, the actuation device is arranged on the movable pulley guide device. The actuation device is particularly advantageous for detecting swing-arm anti-tilt safety locks because when the traction rope normally pulls the counterweight, the taut traction rope interacts with the swing arm of the safety lock, keeping the safety lock in an unlocked state. Once the traction rope is slackened, the swing arm of the safety lock moves rapidly, thereby locking the lock block onto the safety rope to prevent the counterweight from falling.

[0021] Optionally, the safety lock detection device further includes a buffer device, which is used to block and cushion the movable pulley and the movable pulley connecting member when the safety lock fails. Optionally, the buffer device is arranged on the movable pulley guide device. Optionally, the buffer device is formed by a spring. The buffer device can prevent the movable pulley and the movable pulley connecting member from violently colliding with the movable pulley guide device or the frame under the action of the counterweight when the safety lock fails, thereby increasing the service life of the detection equipment.

[0022] Optionally, the safety lock detection device further includes a trolley drive device for sliding the trolley between the storage position and the slide-out position.

[0023] Optionally, the safety lock detection device further includes a flipping frame drive device, which is used to flip the flipping frame between the folded position and the unfolded position.

[0024] Optionally, the trolley drive device and / or the tilting frame drive device and / or the lifting device are fixed to the frame.

[0025] Optionally, a guide wheel is arranged on the counterweight, and the guide rope passes through the counterweight via the guide wheel. The guide wheel reduces wear caused by friction between the counterweight and the guide rope, thereby increasing the service life of the testing bench, especially its guide rope and counterweight.

[0026] Optionally, the testing bench further includes a safety device testing unit for testing safety devices. This safety device testing unit is fixed to the base inside the frame. Safety devices can be installed and tested within the safety device testing unit, which is arranged such that its axial direction is perpendicular to or parallel to the sliding direction of the trolley. Thus, the testing bench integrates both a safety lock testing device and a safety device testing device, meaning it can be used to test both safety locks and safety devices. Furthermore, since the safety device testing unit is located inside the frame, it does not require additional space.

[0027] Optionally, the safety lock detection device further includes a locking pin, which, in the retracted state of the safety lock detection device, locks the counterweight onto the frame. Thus, in the retracted state of the safety lock detection device, the weight of the counterweight can be primarily borne by the locking pin, without subjecting the traction rope to prolonged tensile stress, thereby increasing the service life of the traction rope.

[0028] Optionally, the testing platform also includes a movable carriage, within which the frame is installed. Since the testing platform is entirely housed within the movable carriage, it can be easily transported to the required construction site using a transport vehicle. Therefore, addressing the problem that existing testing equipment is only fixed and cannot be quickly deployed on-site, this application achieves mobile operation of the testing equipment through a vehicle-mountable modular structure and an automatic deployment and retraction mechanism. The carriage can be directly loaded onto vehicles for transport, meeting the on-site testing needs of construction sites, thus solving the problem of rapid on-site testing of safety locks and significantly improving the timeliness of testing. Attached Figure Description

[0029] The embodiments of this application will be described in further detail below with reference to the accompanying drawings. However, those skilled in the art will understand that these drawings are for illustrative purposes only and should not be construed as limiting the scope of this application. The accompanying drawings show:

[0030] Figure 1 This is a schematic diagram of a testing bench in a testing state according to one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of a testing bench in a retracted state according to one embodiment of this application;

[0032] Figure 3 This is another schematic diagram of a testing bench in a testing state according to one embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the disengagement mechanism of the safety lock detection device of a testing bench according to one embodiment of this application; and

[0034] Figure 5 yes Figure 4 A magnified view of region A in the image.

[0035] List of reference numerals in the attached drawings: 1. Unhooking mechanism drive unit; 2. Frame; 3. Slide rail; 4. Trolley drive unit; 5. Trolley limiter; 6. Trolley; 7. Displacement sensor; 8. Pressure sensor; 9. Guide rope clamp; 10. Safety lock; 11. Counterweight; 12. Guide rope; 13. Safety rope; 14. Shock absorption device; 15. Safety rope locking device; 16. Tilting frame; 17. Locking pin; 18. Tilting frame drive unit; 19. Base; 20. Traction rope; 21. Fixed pulley; 22. Safety device detection device; 23. Hook connector; 24. Hook; 25. Moving pulley; 26. Moving pulley guide device; 27. Tensioning spring; 28. Trigger pin; 29. ​​Hook pin; 30. Hinge; 31. Guide wheel; 32. Carriage; 33. Starting device; 34. Buffer device; 35. Moving pulley connector. Detailed Implementation

[0036] The testing bench of this application will be further described in detail below with reference to the accompanying drawings, but this application is not limited to the exemplary embodiments shown.

[0037] Figure 1 A schematic diagram of a testing bench according to one embodiment of this application in a testing state is shown. Figure 2 A schematic diagram of a testing bench according to one embodiment of this application in its folded state is shown, and Figure 3 Another schematic diagram of a testing bench according to one embodiment of this application in a testing state is shown. Figures 1 to 3 As can be clearly seen, the testing bench includes a movable carriage 32. Furthermore, the testing bench includes a safety lock testing device for testing the safety lock 10. Here, the safety lock testing device includes a frame 2, which is installed inside the carriage 32. Since the testing bench is entirely arranged within the movable carriage 32, it can be easily transported to the required construction site using a transport vehicle. The carriage 32 can be directly loaded onto vehicles for transport, meeting the on-site testing needs of the construction site, thereby solving the problem of rapid on-site testing of the safety lock 10 and significantly improving the timeliness of the testing. The frame 2 includes a base 19 and a top frame. Furthermore, the safety lock testing device includes a counterweight 11, which is suspended from the frame 2 by a traction rope 20 and can be lifted by a lifting device (not shown). The safety lock 10 to be tested can be mounted on the counterweight 11. Here, the lifting device can, for example, be fixed to the frame 2.

[0038] The safety lock detection device also includes a trolley 6, which is slidably supported on the top frame of the frame 2. For this purpose, a slide rail 3 is arranged on the top frame of the frame 2, and the trolley 6 is slidably supported on the top frame of the frame 2 by means of the slide rail 3. Here, the trolley 6 can slide between a retracted position inside the frame 2 and a slid-out position extending from the frame 2. Figure 1 The image shows that the trolley 6 has slid into the extended position from the frame 2, while... Figure 2The diagram shows the trolley 6 having slid into its retracted position inside the frame 2. To limit the sliding path of the trolley 6, a trolley limiter 5 is arranged on the top frame of the frame 2. The trolley limiter 5 defines the retracted and extended positions of the trolley 6 and prevents the trolley 6 from tipping over, allowing it to slide smoothly on the frame 2. To drive the trolley 6, the safety lock detection device also includes a trolley drive device 4, which is used to slide the trolley 6 between the retracted and extended positions. Here, the trolley drive device 4 can be, for example, an electric cylinder or a pneumatic cylinder. However, the trolley drive device 4 is not limited to these; any drive device in the prior art capable of driving the trolley 6 to perform sliding motion can be used as the trolley drive device 4. The trolley drive device 4 can, for example, be fixed to the frame 2.

[0039] The safety lock detection device also includes a flip-up frame 16, which is rotatably supported on the base 19 of the frame 2. The flip-up frame 16 can rotate between a folded position inside the frame 2 and an unfolded position outside the frame 2. Figure 1 The image shows the flipping frame 16 flipped into its unfolded position, which is exposed from the frame 2. Figure 2 The diagram shows the tilting frame 16 tilted into a folded position inside the frame 2. To drive the tilting frame 16, the safety lock detection device further includes a tilting frame drive unit 18, which is used to tilt the tilting frame 16 between the folded position and the unfolded position. Here, the tilting frame drive unit 18 can be, for example, an electric cylinder or a pneumatic cylinder. However, the tilting frame drive unit 18 is not limited to these; any drive device in the prior art capable of driving the tilting frame 16 to perform a tilting motion can be used as the tilting frame drive unit 18. Figure 1 and Figure 2 As can be clearly seen, the flipping frame drive device 18 can also be fixed on the frame 2.

[0040] The safety lock detection device also includes a guide rope 12, which passes through the counterweight 11 to guide it. For this purpose, the upper end of the guide rope 12 is fixed to the trolley 6 and the lower end of the guide rope 12 is fixed to the tilting frame 16. Figures 1 to 3In the illustrated embodiment, the upper end of the guide rope 12 is exemplarily fixed to the trolley 6 by means of a guide rope clamp 9. However, the upper end of the guide rope 12 can also be fixed to the trolley 6 in other ways. The lower end of the guide rope 12 can also be fixed to the tilting frame 16 in any known manner. The safety lock detection device is capable of detecting the retracted state (see...). Figure 2 ) and detection status (see Figure 1 The device switches between the retracted and folded states. In the retracted state, the trolley 6 slides to a storage position inside the frame 2, and the flipping frame 16 flips to a folded position inside the frame 2. In the detection state, the trolley 6 slides to a sliding position extending from the frame 2, and the flipping frame 16 flips to an unfolded position extending from the frame 2. The guide rope 12 is taut vertically in the detection state, thereby enabling the detection of the safety lock 10. The safety lock detection device also includes a locking pin 17. In the retracted state of the safety lock detection device, the locking pin 17 can lock the counterweight 11 onto the frame 2. Thus, in the retracted state of the safety lock detection device, the weight of the counterweight 11 can be mainly borne by the locking pin 17, without subjecting the traction rope 20 to tensile stress for a long time, thereby increasing the service life of the traction rope 20. It also prevents the counterweight 11 from swaying in the retracted state, because the guide rope 12 cannot be used to guide the counterweight 11 at this time. In the embodiment shown in the figure, especially from... Figure 3 As can be clearly seen, the safety lock detection device includes a total of two guide ropes 12. However, it should be noted that this is merely exemplary; the number of guide ropes 12 in the safety lock detection device can differ from two, as long as they can stably guide the counterweight 11. When the guide ropes 12 are taut in the vertical direction, they serve as guide rails for the counterweight 11, allowing the counterweight 11 to move stably up and down along the taut guide ropes 12. To protect the guide ropes 12 and the counterweight 11 and reduce wear, it is advantageous to arrange guide wheels 31 on the counterweight 11, through which the guide ropes 12 pass. Thus, the guide ropes 12 do not interact directly with the counterweight 11, but rather with the guide wheels 31, thereby avoiding wear caused by friction between the guide ropes 12 and the counterweight 11.

[0041] Especially from Figure 3As can be clearly seen, the safety lock detection device also includes a shock-absorbing device 14 arranged on the tilting frame 16. The shock-absorbing device 14 is used to buffer the falling counterweight 11 when the safety lock 10 fails. When the safety lock 10 fails and causes the counterweight 11 to continue falling, the counterweight 11 can be buffered by the shock-absorbing device 14, preventing damage to the counterweight 11 and even the entire testing platform. Figure 3 In the embodiment shown, the shock-absorbing device 14 is formed by a spring, particularly a helical spring, sleeved on the guide rope 12.

[0042] To detect the safety lock 10, the safety lock detection device further includes a safety rope 13, the upper end of which is fixed to the trolley 6 and the lower end of which can pass through the safety lock 10 to be detected. The safety lock detection device also includes a pressure sensor 8 arranged on the trolley 6, with the upper end of the safety rope 13 fixed to the trolley 6 via the pressure sensor 8. Here, the pressure sensor 8 can be used to measure the braking force of the safety lock 10 when detecting it. To keep the safety rope 13 stable, a safety rope locking device 15 can also be provided, with the lower end of the safety rope 13 fixed to the tilting frame 16 by means of the safety rope locking device 15. This prevents the safety rope 13 from swinging freely. In some embodiments, the safety rope locking device 15 can be omitted, allowing the lower end of the safety rope 13 to remain free. Furthermore, the safety lock detection device also includes a displacement sensor 7 arranged on the trolley 6, which is used to measure the braking distance of the safety lock 10 when detecting it. Specifically, it can be seen from... Figure 3 As can be clearly seen, the displacement sensor 7 is a wire displacement sensor, with the free end of the wire fixed to the counterweight 11. Thus, during the detection process, the braking distance of the safety lock 10 is measured by measuring the length of the wire pulled out by the counterweight 11 during braking. However, this is merely exemplary, and any other type of displacement sensor 7 can be used to measure the braking distance of the safety lock 10.

[0043] Figure 4 A schematic diagram of the unhooking mechanism of the safety lock detection device of the testing bench according to one embodiment of this application is shown. Figure 5 It shows Figure 4 A magnified view of region A in the image. From Figure 4 and Figure 5As can be clearly seen, in order to pull the counterweight 11, the traction rope 20 connects the counterweight 11 to the lifting device (not shown) via a pulley system. The pulley system includes at least one fixed pulley 21 and one movable pulley 25. The fixed pulley 21 is fixed to the trolley 6 above the counterweight 11, and the movable pulley 25 is supported in a movable pulley guide device 26, which can be moved horizontally by means of a movable pulley connector 35. The movable pulley guide device 26 can be fixed to the trolley 6. However, it should be noted that the movable pulley guide device 26 can also be fixed to the top frame. To detect the safety lock 10, the safety lock detection device includes a disengagement mechanism, which comprises: a hook pin 29 fixed to the movable pulley connector 35; a hook connector 23; a hook 24 hinged to the hook connector 23, for example by means of a hinge 30 and preloaded by a tension spring 27, so that when the hook 24 moves toward and collides with the hook pin 29, the hook pin 29 can engage the hook 24; and a disengagement mechanism drive. 1. The unhooking mechanism drive device 1 is capable of moving the hook 24 horizontally toward or away from the hook pin 29 via the hook connector 23; and a trigger pin 28, located in the movement path of the hook 24, such that when the hook 24 is moved to contact the trigger pin 28, the hook 24, under the driving force of the unhooking mechanism drive device 1, pivots against the preload force of the tension spring 27 via the trigger pin 28, thereby unhooking the hook 24 from the hook pin 29. Here, the unhooking mechanism drive device 1 can be, for example, an electric cylinder or a pneumatic cylinder. However, the unhooking mechanism drive device 1 is not limited to this; any drive device in the prior art capable of driving the hook connector 23 to move the hook 24 horizontally toward or away from the hook pin 29 can be used as the unhooking mechanism drive device 1. Figure 4 and Figure 5 It can be clearly seen that the trigger pin 28 is arranged on the movable pulley guide device 26. From Figure 1 and Figure 2 It can be clearly seen that the unhooking mechanism drive device 1 is fixed to the top frame. However, it should be noted that the unhooking mechanism drive device 1 can also be fixed to the trolley 6.

[0044] To improve the detection effect of the safety lock 10, the safety lock detection device further includes an actuation device 33. When the hook pin 29 is engaged with the hook 24, and the hook 24 is moved to contact the trigger pin 28, the actuation device 33 is compressed by the movable pulley 25 or the movable pulley connector 35. Therefore, when the hook 24 disengages from the hook pin 29, the actuation device 33 can eject the movable pulley 25 and the movable pulley connector 35. Figure 4 and Figure 5 As can be clearly seen, the starting device 33 is formed by a spring, particularly a compression spring, and the starting device 33 is arranged on the movable pulley guide device 26.

[0045] To prevent the movable pulley 25 and the movable pulley connector 35 from impacting the movable pulley guide device 26 when the safety lock 10 fails, the safety lock detection device further includes a buffer device 34. The buffer device 34 is used to block and buffer the movable pulley 25 and the movable pulley connector 35 when the safety lock 10 fails. Figure 4 As can be clearly seen, the buffer device 34 is arranged on the movable pulley guide device 26 and is formed by spring elements, particularly compression springs.

[0046] Back to Figures 1 to 3 As can be seen, the testing bench also includes a safety device testing device 22 for testing safety devices. The safety device testing device 22 is fixed to the base 19 inside the frame 2. Safety devices can be installed and tested in the safety device testing device 22, which is arranged such that its axial direction is perpendicular to or parallel to the sliding direction of the trolley 6. Such a safety device testing device 22 can be a safety device testing device known in the prior art. For example, the applicant of this application developed the SAJT-M series horizontal testing bench for fall arresters. Thus, the testing bench integrates both a safety lock testing device and a safety device testing device 22, meaning that the testing bench can be used not only to test safety locks but also to test safety devices. Moreover, since the safety device testing device 22 is located inside the frame 2, it does not require additional space.

[0047] The following will describe in detail how to switch the state of the testing bench. As described above, Figure 2 The test bench is shown in its retracted state. To perform the test, the test bench must first be moved from its retracted position. Figure 2 The shown collapsed state has switched to Figure 1 The detection status is shown. To do this, first unlock the locking pin 17, thereby releasing the counterweight 11 from the frame 2. Then the trolley drive device 4 can be driven to move the trolley 6 from... Figure 2 The storage position shown inside the frame 2 slides to... Figure 1 The slide-out position extending from the frame 2 is shown. The tilting frame drive 18 can then be driven to move the tilting frame 16 from... Figure 2 The folding position shown inside the frame 2 is flipped to... Figure 1 The diagram shows the unfolded position from the frame 2. When the trolley 6 has slid to the extended position from the frame 2 and the flipping frame 16 has flipped to the unfolded position from the frame 2, the guide rope 12 is taut in the vertical direction, thereby placing the testing bench in... Figure 1 The detection state shown enables the detection of the safety lock 10. It should be noted that the order of sliding the trolley 6 and flipping the tilting frame 16 can be interchanged; that is, the tilting frame 16 can be moved from... Figure 2 The folding position shown inside the frame 2 is flipped to... Figure 1 The image shows the unfolded position from which the frame 2 is flipped out, and then the trolley 6 is moved from... Figure 2 The storage position shown inside the frame 2 slides to... Figure 1 The slide-out position extending from the frame 2 is shown. Alternatively, the sliding of the trolley 6 and the tilting of the tilting frame 16 can also be performed simultaneously. Accordingly, in order to remove the testing bench from the machine after testing is completed... Figure 1 The detection status shown has been switched to Figure 2 The retracted state shown allows the trolley 6 to move accordingly from... Figure 1 The slide position shown is slid to Figure 2 The storage location shown and the flipping frame 16 are shown. Figure 1 The unfolded position shown is flipped to Figure 2 The folded position is shown. The counterweight 11 is then locked to the frame 2 using the locking pin 17. The height of the counterweight 11 can be adjusted using the lifting device or the unhooking mechanism drive device 1 so that it is positioned where it can be locked to the frame 2 using the locking pin 17.

[0048] The following will describe in detail how to install or replace the security lock 10 to be tested. First, in Figure 1In the indicated state, the counterweight 11 is lowered to its lowest position using the lifting device, allowing it to rest on the shock-absorbing device 14. Then, the safety rope locking device 15 is released, and the safety rope 13 is pulled out from the previously tested safety lock 10. The previously tested safety lock 10 is then removed from the counterweight 11, and a new safety lock 10 to be tested is installed onto the counterweight 11. Next, the safety rope 13 is passed through the newly installed safety lock 10 to be tested, and the lower end of the safety rope 13 is secured to the tilting frame 16 using the safety rope locking device 15. If a safety lock 10 is not yet installed on the counterweight 11, the steps of pulling the safety rope 13 from the previously tested safety lock 10 and removing the previously tested safety lock 10 from the counterweight 11 are omitted.

[0049] The following describes in detail how the safety lock 10 is tested. First, the counterweight 11, on which the safety lock 10 to be tested is installed, is lifted to a predetermined position using a lifting device. Then, the disengagement mechanism drive device 1 is activated, moving the hook connector 23 toward the trigger pin 28. Here, since the hook pin 29 is already engaged with the hook 24, the movable pulley connector 35 moves together with the movable pulley 25 under the drive of the hook connector 23. Driven by the disengagement mechanism drive device 1, the hook 24 reaches the trigger pin 28 and contacts it, thereby stopping the hook 24 from moving. At this time, the starting device 33 has been compressed by the movable pulley 25 or the movable pulley connector 35. Under the further drive of the disengagement mechanism drive device 1, the hook 24 overcomes the preload of the tension spring 27 and pivots around the hinge 30, thereby disengaging the hook 24 from the hook pin 29. Under the action of the starting device 33, the movable pulley 25 and the movable pulley connector 35 are quickly ejected, thereby immediately slackening the traction rope 20 pulling the counterweight 11. When the safety lock 10 is a swing-arm anti-tilt safety lock, the swing arm of the safety lock 10 is released due to the slackening of the traction rope 20, and the safety lock 10 is braked. When the safety lock 10 is a centrifugal trigger safety lock, the counterweight 11 falls under its own weight. When the speed of the counterweight 11 reaches the trigger threshold of the safety lock 10, the centrifugal force generated by the flying block of the safety lock 10 overcomes the constraint force of the spring and swings outward to a certain extent, triggering the waiting actuator, driving the locking rope mechanism to lock the locking block onto the safety rope 13. During the process of the counterweight 11 falling along the guide rope 12, the displacement sensor 7 can detect the distance the counterweight 11 falls during braking, thereby obtaining the braking distance of the safety lock 10. The pressure sensor 8 measures the braking force of the safety lock 10 by detecting the tension of the safety rope 13 during braking. If the safety lock 10 cannot complete braking within its effective travel (e.g., 500mm), it indicates that the safety lock 10 has failed. In this case, the buffer device 34 blocks and cushions the movable pulley 25 and the movable pulley connector 35, while the counterweight 11 continues to fall until the shock-absorbing device 14 blocks the counterweight 11. The detection process is then complete.

[0050] The following describes in detail how to reset the test bench after testing. After testing, the movable pulley 25 moves at most along the movable pulley guide device 26 to the limit position defined by the buffer device 34. At this time, the disengagement mechanism drive device 1 is driven, causing the hook connector 23 and its hook 24 to move toward the hook pin 29 on the movable pulley connector 35 until the hook 24 contacts the hook pin 29. Under the further drive of the disengagement mechanism drive device 1, the hook pin 29 overcomes the preload force of the tension spring 27 and engages with the hook 24. After the hook pin 29 is fully engaged with the hook 24, under the preload force of the tension spring 27, the hook 24 firmly holds the hook pin 29. Then, the disengagement mechanism drive device 1 is driven in the opposite direction to move the hook connector 23 and its hook 24 to the position before disengagement and stop, waiting for the next test. If the counterweight 11 is not stopped at the appropriate position, it can be lifted to the appropriate position by means of a lifting device.

[0051] The above descriptions are merely exemplary embodiments of this application. The scope of protection of this application is not limited to the above embodiments. All technical solutions falling within the concept of this application are within the scope of protection of this application. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this application should also be considered within the scope of protection of this application.

Claims

1. A testing bench, the testing bench comprising a safety lock testing device capable of testing a safety lock (10), The safety lock detection device includes: The frame (2) includes a base (19) and a top frame; as well as A counterweight (11) is suspended from the frame (2) by means of a traction rope (20) and can be lifted by means of a lifting device. The safety lock (10) to be tested can be installed on the counterweight (11). Its features are, The safety lock detection device also includes: A trolley (6) is slidably supported on the top frame of the frame (2); A tilting frame (16), which is tiltably supported on the base (19) of the frame (2); and A guide rope (12) passes through the counterweight (11) to guide the counterweight (11), wherein the upper end of the guide rope (12) is fixed to the pulley (6) and the lower end of the guide rope (12) is fixed to the tilting frame (16). The safety lock detection device can switch between a retracted state and a detection state, wherein: In the retracted state, the trolley (6) slides to the storage position inside the frame (2) and the flipping frame (16) flips to the folded position inside the frame (2); In the detection state, the trolley (6) slides to the slide-out position extending from the frame (2) and the flipping frame (16) flips to the unfolded position flipped out from the frame (2), and the guide rope (12) is taut in the vertical direction in the detection state, thereby enabling the detection of the safety lock (10).

2. The testing bench according to claim 1, Its features are, The safety lock detection device also includes a safety rope (13), the upper end of which is fixed to the trolley (6) and the lower end of which can pass through the safety lock (10) to be detected.

3. The testing bench according to claim 2, Its features are, The safety lock detection device also includes: A pressure sensor (8) is arranged on the trolley (6), and the upper end of the safety rope (13) is fixed to the trolley (6) via the pressure sensor (8), wherein the pressure sensor (8) is used to measure the braking force of the safety lock (10) when the safety lock (10) is detected; and / or Safety rope locking device (15), the lower end of the safety rope (13) is fixed to the tilting frame (16) by means of the safety rope locking device (15).

4. The testing bench according to claim 1, Its features are, The safety lock detection device also includes a shock-absorbing device (14) arranged on the tilting frame (16), the shock-absorbing device (14) being used to cushion the fall when the safety lock (10) fails.

5. The testing bench according to claim 4, Its features are, The shock-absorbing device (14) is formed by a spring element sleeved on the guide rope (12).

6. The testing bench according to claim 1, Its features are, The safety lock detection device further includes a displacement sensor (7) arranged on the trolley (6), the displacement sensor (7) being used to measure the braking distance of the safety lock (10) when detecting the safety lock (10).

7. The testing bench according to claim 6, Its features are, The displacement sensor (7) is a wire displacement sensor, and the free end of the wire of the wire displacement sensor is fixed on the counterweight (11).

8. The testing bench according to claim 1, Its features are, A slide rail (3) is arranged on the top frame of the frame (2), and the trolley (6) is slidably supported on the top frame of the frame (2) by means of the slide rail (3); and / or A trolley limiter (5) is arranged on the top frame of the frame (2), which limits the storage position and sliding position of the trolley (6) and / or prevents the trolley (6) from overturning.

9. The testing bench according to claim 1, Its features are, The traction rope (20) connects the counterweight (11) to the lifting device via a pulley block. The pulley block includes at least one fixed pulley (21) and one movable pulley (25). The fixed pulley (21) is fixed on the trolley (6) above the counterweight (11), and the movable pulley (25) is supported in a movable pulley guide device (26) in a horizontal direction by means of a movable pulley connector (35). The movable pulley guide device (26) is fixed on the trolley (6) or the top frame.

10. The testing bench according to claim 9, Its features are, The safety lock detection device further includes a disengagement mechanism, which comprises: Hook pin (29), said hook pin (29) is fixed on the movable pulley connector (35); Hook connector (23); A hook (24) is hinged to the hook connector (23) and pre-tensioned by a tension spring (27) so that when the hook (24) moves toward the hook pin (29) and collides with the hook pin (29), the hook pin (29) can engage the hook (24). A disengagement mechanism drive (1) capable of moving the hook (24) horizontally toward or away from the hook pin (29) via the hook connector (23); and A trigger pin (28) is located in the movement path of the hook (24) such that when the hook (24) is moved to contact the trigger pin (28), the hook (24) pivots under the driving force of the disengagement mechanism drive device (1) through the trigger pin (28) to overcome the preload force of the tension spring (27), so that the hook (24) disengages from the hook pin (29).

11. The testing bench according to claim 10, Its features are, The safety lock detection device also includes: The actuating device (33), when the hook pin (29) is engaged with the hook (24), when the hook (24) is moved to contact the trigger pin (28), is compressed by the movable pulley (25) or the movable pulley connector (35), so that when the hook (24) is disengaged from the hook pin (29), the actuating device (33) can eject the movable pulley (25) and the movable pulley connector (35); and / or A buffer device (34) is provided to block and buffer the movable pulley (25) and the movable pulley connector (35) when the safety lock (10) fails.

12. The testing bench according to claim 11, Its features are, The trigger pin (28) and / or the actuating device (33) and / or the buffer device (34) are arranged on the movable pulley guide device (26); and / or The unhooking mechanism drive unit (1) is fixed to the trolley (6) or the top frame; and / or The buffer device (34) is formed of a spring; and / or The starting device (33) is formed by a spring.

13. The testing bench according to claim 1, Its features are, The safety lock detection device also includes: A trolley drive device (4) is used to slide the trolley (6) between the storage position and the slide-out position; and / or A flipping frame drive device (18) is used to flip the flipping frame (16) between the folded position and the unfolded position.

14. The testing bench according to claim 13, Its features are, The trolley drive device (4) and / or the tilting frame drive device (18) and / or the lifting device are fixed on the frame (2).

15. The testing bench according to claim 1, Its features are, A guide wheel (31) is arranged on the counterweight (11), and the guide rope (12) passes through the counterweight (11) via the guide wheel (31).

16. The testing bench according to claim 1, Its features are, The testing bench also includes a safety device testing device (22) for testing safety devices. The safety device testing device (22) is fixed inside the frame (2) on the base (19). The safety device testing device (22) can be installed and tested. The safety device testing device (22) is arranged such that its axial direction is perpendicular to or parallel to the sliding direction of the trolley (6).

17. The testing bench according to claim 1, Its features are, The safety lock detection device also includes a locking pin (17), which, when the safety lock detection device is in the retracted state, can lock the counterweight (11) onto the frame (2).

18. The testing bench according to any one of claims 1 to 17, Its features are, The testing bench also includes a movable carriage (32), and the frame (2) is installed inside the carriage (32).

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