Elevator step detection device

Abstract

The application discloses an elevator step detection device, which comprises a seat body, a fixing assembly, a pressure detection mechanism, a horizontal detection mechanism and a displacement detection part. The fixing assembly is used for fixing the step. The pressure detection mechanism comprises a downward pressing part. The horizontal detection mechanism comprises two side pressing parts. The pressure detection mechanism is arranged to apply a certain load to the upper end surface of the step when the downward pressing part moves downward, so that the displacement detection part detects the bending deformation resistance of the step under normal load. The horizontal detection mechanism is arranged to press the side end of the step when the two side pressing parts move close to each other, so that the displacement detection part detects the deformation amount of the step in the up-down direction under abnormal load when the step is blocked by foreign matters and subjected to abnormal load. Thus, the problem that the existing detection method cannot truly detect the bending deformation resistance of the step under abnormal load is solved.

Description

Technical Field

[0001] This invention relates to the field of elevator testing technology, and more particularly to elevator step testing equipment. Background Technology

[0002] The test requirements for static load testing of escalators and moving walkways (GB16899-2011) under section 5.3.3.2.1 are as follows: A bending deformation test shall be conducted on the escalator steps. The test method involves applying a 3000N force (including the weight of the pad) vertically through a steel pad at the center of the tread. The pad should have an area of ​​0.2m × 0.3m and a thickness of at least 25mm, with one 0.2m side parallel to the leading edge of the step and the other 0.3m side perpendicular to the leading edge of the step. The 3000N load only considers the load caused by normal passenger loads (including possible luggage) and the self-weight of the step. In practice, the bending deformation test is often used simultaneously to evaluate the strength of the escalator steps. However, the bending deformation test only verifies whether the structural stiffness of the escalator steps can ensure that the deformation caused by the step under normal loads does not exceed the dimensional requirements for normal meshing between the step and the comb plate; it cannot directly evaluate the strength of the escalator steps.

[0003] The main reason for step breakage during escalator operation is that the steps are subjected to impacts or obstructions from foreign objects, or the rollers are aged or missing. This causes the steps to be subjected to additional loads in addition to the normal loads, which may lead to step breakage and failure. Summary of the Invention

[0004] The main objective of this invention is to propose an elevator step testing device, which aims to solve the problem that existing testing methods cannot accurately detect the bending deformation resistance of elevator steps after they are subjected to unconventional loads.

[0005] To achieve the above objectives, the present invention provides an elevator step detection device, wherein the elevator step detection device comprises:

[0006] seat body;

[0007] A fixing component, provided on the base, is used to fix the steps;

[0008] A pressure detection mechanism includes a downward pressing part that is movably disposed in the vertical direction, the downward pressing part being used to press against a step located below the downward pressing part during a downward moving stroke;

[0009] A horizontal detection mechanism includes two side-pressure parts, which are spaced apart laterally and are disposed on the base body laterally, allowing them to approach and move away from each other, so as to clamp the step located between the two side-pressure parts during the approaching stroke; and,

[0010] The displacement detection unit is used to detect the deformation of the steps in the vertical direction when the downward pressing part moves downward and the two side pressing parts move closer to each other.

[0011] Optionally, each of the side pressing parts includes a pressure plate that extends vertically, and the pressure plate has a through hole extending horizontally.

[0012] The horizontal detection mechanism further includes a screw and a nut. The screw has a fixed end and a locking end. The screw passes through the through holes of the two pressure plates. The nut is screwed to the locking end of the screw. The nut is used to drive the pressure plate near the locking end to move towards the pressure plate near the fixed end during the locking stroke.

[0013] Optionally, multiple through holes are provided, and the multiple through holes are arranged at intervals on the plane where the pressure plate is located;

[0014] Multiple screws and nuts are provided, and each screw and nut is provided in a one-to-one correspondence with a plurality of through holes on the two pressure plates.

[0015] Optionally, the side pressure part further includes a pressure head disposed on the pressure plate, the pressure head being disposed on the side of the pressure plate facing the comb teeth, and the pressure head being configured to correspond to the comb teeth of the ladder.

[0016] Optionally, the horizontal detection mechanism is movably arranged in the longitudinal direction so that the pressure head can correspond to multiple detection points of the comb teeth in the longitudinal direction.

[0017] Optionally, the horizontal detection mechanism further includes a first pressure sensor, which is disposed between the pressure plate and the pressure head to detect the magnitude of the pressure exerted by the side end face of the step on the pressure head.

[0018] Optionally, the pressure detection mechanism further includes a first driving device, which has a first driving part that is movably arranged in the vertical direction. The first driving part is connected to the pressing part to drive the pressing part to move up and down.

[0019] Optionally, the pressure detection mechanism further includes a control device and a second pressure sensor. The second pressure sensor is used to detect the pressure exerted by the lower pressure part on the upper end surface of the step. The control device is electrically connected to the second pressure sensor and the first drive device to control the operation of the first drive device according to the second pressure sensor.

[0020] Optionally, the pressure detection mechanism further includes a mounting part and a buffer part. The mounting part is fixed to the first driving part, and the buffer part is disposed between the mounting part and the pressing part to provide buffering when the pressing part abuts against the upper end surface of the step.

[0021] Optionally, the fixing component includes a fixing base, on which a plurality of fixing shafts extending horizontally are provided, the plurality of fixing shafts being spaced apart, and each fixing shaft being used to be inserted into a corresponding rotating shaft mounting hole on the step.

[0022] In the technical solution provided by this invention, the ladder steps are fixed by a fixing component. The downward pressing part moves downward and applies a certain load to the upper end surface of the ladder steps, simulating the scenario of the ladder steps being subjected to normal conventional loads. The displacement detection part detects whether the deformation of the ladder steps caused by the downward pressing part applying load to the upper end surface of the ladder steps exceeds the dimensional requirements for normal meshing between the ladder steps and the comb plate. When the two side pressing parts approach each other, they squeeze the side ends of the ladder steps, simulating the scenario of the ladder steps being subjected to unconventional loads due to foreign objects being stuck. The displacement detection part also detects whether the deformation of the ladder steps exceeds the deformation requirements when the two side pressing parts apply load to the side ends of the ladder steps. By setting a pressure detection mechanism to apply vertical force to the ladder steps and a horizontal detection mechanism to apply lateral force to the ladder steps, the displacement detection part can detect the bending deformation resistance of the ladder steps after being subjected to normal loads and unconventional loads, thereby solving the problem that existing detection methods cannot accurately detect the bending deformation resistance of the ladder steps after being subjected to unconventional loads. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a perspective view of an embodiment of the elevator step detection device provided by the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the exploded structure of an elevator step detection device.

[0026] Explanation of icon numbers:

[0027]

[0028]

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions 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. When the 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.

[0033] The test requirements for static load testing of escalators and moving walkways (GB16899-2011) under section 5.3.3.2.1 are as follows: A bending deformation test shall be conducted on the escalator steps. The test method involves applying a 3000N force (including the weight of the pad) vertically through a steel pad at the center of the tread. The pad should have an area of ​​0.2m × 0.3m and a thickness of at least 25mm, with one 0.2m side parallel to the leading edge of the step and the other 0.3m side perpendicular to the leading edge of the step. The 3000N load only considers the load caused by normal passenger loads (including possible luggage) and the self-weight of the step. In practice, the bending deformation test is often used simultaneously to evaluate the strength of the escalator steps. However, the bending deformation test only verifies whether the structural stiffness of the escalator steps can ensure that the deformation caused by the step under normal loads does not exceed the dimensional requirements for normal meshing between the step and the comb plate; it cannot directly evaluate the strength of the escalator steps. The main reason for step breakage during escalator operation is that the steps are subjected to impacts or obstructions from foreign objects, or the rollers are aged or missing. This causes the steps to be subjected to additional loads in addition to the normal loads, which may lead to step breakage and failure.

[0034] To address the aforementioned problems, this invention provides an elevator step detection device. Figures 1 to 2 This is a specific embodiment of the elevator step detection device provided by the present invention.

[0035] Please see Figures 1 to 2 The elevator step detection device includes a base, a fixing component, a pressure detection mechanism 1, a horizontal detection mechanism 2, and a displacement detection unit. The fixing component is disposed on the base and is used to fix the step 100. The pressure detection mechanism 1 includes a downward pressing part 11, which is movably disposed on the base in the vertical direction to press the step 100 located below the downward pressing part 11 during the downward movement. The horizontal detection mechanism 2 includes two side pressing parts 21, which are spaced apart in the horizontal direction and can be disposed on the base in the horizontal direction to approach and move away from each other, so as to clamp the step 100 located between the two side pressing parts 21 during the approaching movement. The displacement detection unit is used to detect the deformation of the step 100 in the vertical direction when the downward pressing part 11 moves downward and the two side pressing parts 21 move closer to each other.

[0036] It should be noted that when foreign objects are stuck in the step 100, or when the rollers are worn out or missing, the abnormal load on the step 100 mainly comes from the force on the lateral side.

[0037] In the technical solution provided by this invention, the step 100 is fixed by a fixing component. The pressing part 11 moves downward to apply a certain load to the upper end surface of the step 100, simulating the scenario where the step 100 is subjected to a normal conventional load. The displacement detection part detects whether the deformation of the step 100 caused by the pressing part 11 applying a load to the upper end surface of the step 100 exceeds the dimensional requirements for normal meshing between the step 100 and the comb tooth plate 101. When the two side pressing parts 21 approach each other, they squeeze the side ends of the step 100, simulating the situation where a foreign object is stuck in the step 100. In cases of unconventional loads, the displacement detection unit detects whether the deformation of the step 100 exceeds the deformation requirements when the two side pressure units 21 apply loads to the side ends of the step 100. By setting up the pressure detection mechanism 1 to apply vertical force to the step and the horizontal detection mechanism 2 to apply lateral force to the step, the displacement detection unit can detect the bending deformation resistance of the step 100 under normal loads and unconventional loads, thus solving the problem that existing detection methods cannot accurately detect the bending deformation resistance of the step after it is subjected to unconventional loads.

[0038] It should be noted that the displacement detection unit can be a displacement sensor, a dial indicator, or other devices that can measure the deformation of the stepped structure. The specific measurement method is not specifically limited in this solution.

[0039] Specifically, the two side pressure parts 21 can be driven to move by setting an electric drive device, and the side pressure parts 21 are connected to the drive part of the drive device to drive the side pressure parts 21 to move. The electric drive device can be a cylinder, a hydraulic cylinder, an electric cylinder, etc.

[0040] Please see Figure 2 In this embodiment, each of the side pressure parts 21 includes a pressure plate 211 extending vertically. The pressure plate 211 has a through hole 212 extending horizontally. To drive the two pressure plates 211 to move closer or further apart, the horizontal detection mechanism 2 also includes a screw 22 and a nut 23. The screw 22 has a fixed end and a locking end. The locking end of the screw 22 passes through the through hole 212 of one of the pressure plates 211, and then passes through both pressure plates 211 in sequence. The screw 22 passes through both pressure plates 211, and then... The nut 23 is screwed to the locking end of the screw 22. As the nut 23 rotates, it gradually tightens and eventually abuts against the pressure plate 211 near the locking end. In order for the two pressure plates 211 to apply a clamping load to the step 100, the nut 23 can be adjusted to continue rotating. Because the screw head of the screw 22 abuts against the pressure plate 211 near the fixed end, when the nut 23 continues to rotate, it applies a clamping force to the pressure plate 211 near the locking end, thereby facilitating the application of load to the step 100.

[0041] Furthermore, to ensure a more balanced force exerted by the two pressure plates 211 on the step 100, in this embodiment, multiple through holes 212 are provided, spaced apart on the plane of the pressure plates 211. Multiple screws 22 and nuts 23 are also provided, each corresponding to one of the multiple through holes 212 on the two pressure plates 211. Thus, by adjusting the locking depth of the multiple nuts 23, the holding force at the corresponding through holes 212 on the two pressure plates 211 can be adjusted.

[0042] Furthermore, because the step 100 has an irregular shape and a cross-section resembling a triangle, the point of action corresponding to the pressure plate 211 is generally located at the location corresponding to the comb teeth 101. In order to simulate the insertion of a foreign object similar to a coin, in this embodiment, the side pressure part 21 also includes a pressure head 24 disposed on the pressure plate 211. The pressure head 24 is disposed on the side of the pressure plate 211 facing the comb teeth 101, and the pressure head 24 is configured to correspond to the comb teeth 101 of the step 100. When a foreign object is inserted, the stress is concentrated at the point of force corresponding to the inserted foreign object. Therefore, by setting the pressure head 24, when the two pressure plates 211 squeeze and provide load, the pressure at the pressure head 24 can be detected. When the pressure at the pressure head 24 reaches a set data, the degree of deformation of the step 100 can be measured by the displacement detection part.

[0043] Furthermore, in order to simulate the deformation intensity of the ladder 100 when a foreign object is stuck in different places on the comb teeth 101, in this embodiment, the horizontal detection mechanism 2 is movably arranged along the longitudinal direction. In this way, the pressure head 24 can correspond to multiple detection points on the comb teeth 101 in the longitudinal direction, which can facilitate the detection of multiple stress points on the comb teeth 101 in the longitudinal direction and the deformation of the ladder.

[0044] Specifically, in this embodiment, the horizontal detection mechanism 2 further includes a first pressure sensor 25, which is disposed between the pressure plate 211 and the pressure head 24 to detect the pressure exerted by the side end face of the step 100 on the pressure head 24. Of course, to cooperate with the first pressure sensor 25 and enable the testing personnel to observe load changes and the strength and deformation of the step 100, in this embodiment, the horizontal detection mechanism 2 also includes a signal amplifier, a data acquisition system, and measurement analysis software. The specific measurement and detection method is as follows: the first pressure sensor 25 receives a 10V voltage input, monitors the pressure value through changes in the output voltage, and transmits it to the signal amplifier. The signal amplifier amplifies the signal and transmits it to the acquisition card of the data acquisition system. The acquisition card is connected to a computer, and the measurement analysis software records the pressure data. Based on the measured data, the loading screw 22 is adjusted to apply a lateral force to the step 100.

[0045] Specifically, in this embodiment, the pressure detection mechanism 1 further includes a first driving device. The first driving device has a first driving part that is movably arranged in the vertical direction. The first driving part is connected to the pressing part 11 to drive the pressing part 11 to move up and down. The step 100 is loaded by electric drive. The first driving device can be an electric cylinder, hydraulic cylinder, or pneumatic cylinder, etc. The first driving part corresponds to the driving rod of the electric cylinder, hydraulic cylinder, or pneumatic cylinder. The specific form of the first driving device is not specifically limited in this solution.

[0046] Specifically, please refer to Figure 1 In this embodiment, the pressure detection mechanism 1 further includes a control device and a second pressure sensor 14. The second pressure sensor 14 is used to detect the pressure exerted by the pressing part 11 on the upper surface of the step 100. The control device is electrically connected to the second pressure sensor 14 and the first driving device to control the operation of the first driving device based on the second pressure sensor 14. The specific measurement and detection method is as follows: First, the pressing part 11 is controlled to move downward by the control device, and a force of 3000N is applied vertically. The pressing part 11 is set as a pressure plate with an area of ​​0.2m × 0.3m and a thickness of at least 25mm. The short side of the pressing part 11 (0.2m) is parallel to the front edge of the step 100, and the long side (0.3m) is perpendicular to the front edge of the step 100. The pressure data is recorded by measurement and analysis software, and the degree of deformation of the step 100 under such a detection force is measured by the displacement detection unit.

[0047] Furthermore, since the first driving device is electrically driven, the force changes rapidly at the instant the first driving device drives the pressing part 11 to contact the step 100. To avoid the first driving device being subjected to excessive reaction force, in this embodiment, the pressure detection mechanism 1 further includes a mounting part 12 and a buffer part 13. The mounting part 12 is fixed to the first driving part, and the buffer part 13 is disposed between the mounting part 12 and the pressing part 11 to provide cushioning when the pressing part 11 abuts against the upper end surface of the step 100. Preferably, the buffer part 13 includes a spring. Thus, by setting the buffer part 13, the load acting on the step 100 gradually increases.

[0048] Specifically, in this embodiment, the fixing component includes a fixing base, on which multiple fixing shafts extend horizontally. These fixing shafts are spaced apart. During installation, the step 100 is mounted via a rotating shaft through its mounting holes in the step 100 and the mounting holes on the step chain. Each fixing shaft is used to insert itself into the corresponding rotating shaft mounting holes on the step 100. Since both the upper and lower ends of the step 100 are provided with rotating shaft mounting holes, the multiple fixing shafts can fix the upper and lower ends of the step 100, preventing it from flipping. This facilitates load detection by the pressure detection mechanism 1 and the horizontal detection mechanism 2.

[0049] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An elevator step detection apparatus, characterized by The utility model relates to a testing device for testing the deformation of a ladder step, comprising: a base body; a fixing assembly arranged on the base body for fixing the ladder step; a pressure detection mechanism including a lower pressing part movably arranged in the vertical direction, the lower pressing part being used to press the ladder step below the lower pressing part in the downward movement; a horizontal detection mechanism including two side pressing parts arranged in the lateral direction and movably arranged in the lateral direction on the base body to clamp the ladder step between the two side pressing parts in the mutual approaching movement, for simulating the force on the ladder step from the lateral side when the comb tooth is blocked by foreign matter; and a displacement detection part for detecting the deformation amount of the ladder step in the vertical direction when the lower pressing part moves downward and the two side pressing parts move toward each other. The side pressing part further includes a pressing head arranged on the pressing plate, the pressing head being arranged on the pressing plate for the side of the comb tooth, and the pressing head being arranged corresponding to the comb tooth of the ladder step. The horizontal detection mechanism is movably arranged in the longitudinal direction, so that the pressing head can correspond to multiple detection points of the comb tooth in the longitudinal direction, for simulating the deformation strength of the ladder step when the foreign matter is blocked in different positions of the comb tooth in the longitudinal direction. The horizontal detection mechanism further includes a first pressure sensor arranged between the pressing plate and the pressing head, for detecting the pressure of the side end surface of the ladder step acting on the pressing head.

2. The elevator step detection apparatus of claim 1, wherein Each side pressing part includes a pressing plate arranged in the vertical direction, and the pressing plate is provided with a through hole in the lateral direction. The horizontal detection mechanism further includes a screw rod and a nut, the screw rod having a fixed end and a locking end, the screw rod being arranged in the through hole of the two pressing plates, the nut being screwed on the locking end of the screw rod, and the nut being used to drive the pressing plate close to the locking end to move toward the pressing plate close to the fixed end in the locking movement.

3. The elevator step detection apparatus of claim 2, wherein The through hole is provided with multiple through holes arranged in the plane of the pressing plate. The screw rod and the nut are provided with multiple screw rods and multiple nuts, respectively, corresponding to the multiple through holes on the two pressing plates.

4. The elevator step detection apparatus of claim 1, wherein The pressure detection mechanism further includes a first driving device having a first driving part movably arranged in the vertical direction, the first driving part being connected with the lower pressing part to drive the lower pressing part to move up and down.

5. The elevator step detection apparatus of claim 4, wherein The pressure detection mechanism further includes a control device and a second pressure sensor for detecting the pressure of the upper end surface of the ladder step acted on by the lower pressing part, and the control device is electrically connected with the second pressure sensor and the first driving device to control the first driving device to work according to the second pressure sensor.

6. The elevator step detection apparatus of claim 4, wherein, The pressure detection mechanism further includes a mounting part fixedly arranged on the first driving part and a buffer part arranged between the mounting part and the lower pressing part to provide buffer when the lower pressing part abuts against the upper end surface of the ladder step.

7. The elevator step detection apparatus of claim 1, wherein, The fixing assembly includes a fixing seat provided with multiple fixing shafts arranged in the horizontal direction, the multiple fixing shafts being arranged in the lateral direction, and each fixing shaft being used to be inserted into the rotating shaft mounting hole on the ladder step.

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