Elevator installation gap laser measuring device and method thereof

Abstract

The present application relates to the technical field of gap measurement, and discloses an elevator installation gap laser measuring device and method thereof, comprising a rack. A plurality of pairs of guide wheels with different distances from the rotation center are arranged on the rotating disc of the present application. By rotating the rotating disc, the corresponding guide wheels can be quickly switched to adhere to the elevator gap side wall, adapting to the detection requirements of gaps of different depths. The linkage design of the structure with the retracting slope and the jacking spring can drive the rotating disc to retract inward when the guide wheels move into the gap, assisting the guide wheels to smoothly extend into gaps of different depths. The jacking spring continuously provides elastic thrust, ensuring that the guide wheels are closely attached to the gap side wall, avoiding loosening and deviation during the measurement process. The rotating disc can accurately convert the actual distance of the elevator gap into the measurement distance between the laser range finder and the reflecting plate, avoiding the limitation of small gap on equipment installation, and realizing accurate detection of small gaps at different depths with the advantage of laser ranging.

Description

Technical Field

[0001] This invention belongs to the field of gap measurement technology, specifically, it relates to a laser measurement device and method for elevator installation gaps. Background Technology

[0002] The gap between the elevator landing door and the car door is a core indicator for measuring the quality of elevator installation and operational safety. The width of this gap and the consistency of its dimensions at different depths directly affect the stability of the elevator door's opening and closing. If the gap is too large or the depth deviation exceeds the standard, it can easily cause safety hazards such as door jamming and injuries to people. Therefore, accurate detection of this gap is a necessary step in elevator installation acceptance and daily maintenance.

[0003] Currently, elevator gap inspection mostly uses contact measuring tools such as feeler gauges and vernier calipers, or attempts to introduce laser ranging technology to improve measurement accuracy. However, in practical applications, the gap between the elevator landing door and the car door is extremely small. Components such as laser rangefinders and reflectors have inherent volume, making it difficult to install them directly inside the narrow gap. Even if components are forcibly inserted into the gap, they are prone to interference with the gap sidewalls, potentially scratching the door sidewalls or damaging the inspection equipment. Furthermore, elevator gaps have dimensional differences in the depth direction. Traditional contact tools can only measure the size at the gap opening or a single depth, making it difficult to comprehensively inspect different depth positions. Laser ranging solutions, limited by installation space, cannot flexibly adjust the inspection position to adapt to changes in gap depth, resulting in measurement data that cannot reflect the true size of the gap, significantly reducing the accuracy of depth detection.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A laser measuring device for elevator installation gaps includes a frame with a clamping assembly mounted at the bottom of the frame for mounting the frame above the gap between the elevator landing door and the car door. A pair of turntables are slidably arranged on the frame for fitting against the inner wall of the gap. A laser rangefinder and a reflector are respectively mounted on the top of the pair of turntables. The turntables are used to convert the gap spacing into the distance between the laser rangefinder and the reflector, and facilitate the installation of the device. The turntable is also equipped with four pairs of guide wheels. The bottom guide wheel is attached to the side wall of the gap. The four pairs of guide wheels are at different distances from the center of rotation of the turntable. By rotating the turntable, different guide wheels are driven to attach to the side wall of the gap, and gaps of different depths are detected. A positioning shaft is installed on the frame, and a turntable is movably installed on the positioning shaft. A lifting spring is installed between the positioning shaft and the turntable. The lifting spring is used to drive the turntable to move to both sides. A retraction ramp is installed on the positioning shaft. When the guide wheel is driven to move into the gap, the retraction ramp drives the turntable to retract inward, assisting the guide wheel to move into the gap.

[0006] In a preferred embodiment of the present invention, four support legs are installed at the bottom of the frame, and anti-slip pads are installed at the bottom of each of the four support legs. The support legs are respectively attached to the end faces of the elevator landing door and the car door.

[0007] In a preferred embodiment of the present invention, the clamping assembly includes a bidirectional lead screw shaft, which is rotatably connected to the frame. A slider is engaged on the bidirectional lead screw shaft, a clamping plate is installed at the bottom of the slider, a slide rail is slidably installed on the slider, the slide rail is installed on the side wall of the frame, the slide rail is horizontal, and a knob is installed at the end of the bidirectional lead screw shaft.

[0008] In a preferred embodiment of the present invention, a pair of positioning seats are installed on the frame. The positioning seats have countersunk grooves and are connected to the frame by bolts. A positioning rod is installed on the positioning seat, and a pair of positioning plates are slidably installed on the positioning rod. The pair of positioning plates are rotatably connected to the surfaces of a pair of turntables. A laser rangefinder is installed on the top of one of the positioning plates, and a reflector is installed on the top of the other positioning plate. The reflector corresponds to the emitting end of the laser rangefinder.

[0009] In a preferred embodiment of the present invention, the turntable is provided with a plurality of pairs of mounting holes, the extension lines of the plurality of pairs of mounting holes intersect with the rotation center of the turntable, a mounting seat is provided on the mounting hole, a locking bolt is installed through the mounting hole, the end of the locking bolt is screwed to the surface of the mounting seat, and the locking bolt is used to drive the mounting seat to connect with the mounting hole, and a guide wheel is installed on the surface of the mounting seat.

[0010] In a preferred embodiment of the present invention, a synchronous plate is rotatably mounted on the positioning shaft. The synchronous plate is circular. Limiting plates are also installed at both ends of the positioning shaft. The limiting plates are attached to both ends of the synchronous plate and are used to limit the position of the synchronous plate. A limiting cover is installed on the synchronous plate. A top rod is inserted into the limiting cover. A turntable is installed at the end of the top rod. The turntable rotates synchronously with the synchronous plate.

[0011] In a preferred embodiment of the present invention, a baffle is slidably disposed inside the limiting cover. One end of the baffle is connected to the end of the push rod, and a lifting spring is snapped onto the other end of the baffle. The other end of the lifting spring is snapped onto the end of the limiting cover. The compression direction of the lifting spring and the movement direction of the push rod are both on the same straight line, and the lifting spring is used to drive the turntable to slide towards the outer wall of the gap.

[0012] In a preferred embodiment of the present invention, a fixing block is installed on the positioning shaft, and four guide blocks are installed around the fixing block. The four guide blocks are evenly distributed in a ring. A contraction ramp is provided at one end of the guide block, and a positioning end face is provided at the end of the contraction ramp. The positioning end face is a vertical surface and is used to drive the turntable to slide outward under the action of the lifting spring.

[0013] In a preferred embodiment of the present invention, a connecting frame is installed on the back of the turntable, and a ball bearing is installed at the end of the connecting frame, with the surface of the ball bearing conforming to the end face of the guide block.

[0014] A laser measurement method for elevator installation gaps, comprising the following steps: Step 1: Place the entire device above the gap between the elevator landing door and the car door, so that the four support legs at the bottom of the frame rest on the end faces of the elevator landing door and the car door respectively. The anti-slip pads at the bottom of the support legs enhance the stability of the device and prevent displacement before measurement. Step 2: Rotate the knob at the end of the bidirectional lead screw shaft to drive the bidirectional lead screw shaft to rotate on the frame. Utilize the meshing connection between the bidirectional lead screw shaft and the slider, as well as the sliding cooperation between the slider and the slide rail on the side wall of the frame, to drive the clamping plates at the bottom of the slider to move away from each other and press against the gap end face, thus completing the overall positioning and fixing of the device. Step 3: Relying on the elastic force of the lifting spring on the positioning shaft, the push rod is driven to move the turntable to both sides, so that the bottom guide wheel on the turntable is precisely attached to the side wall of the gap, realizing the initial positioning of the turntable; at the same time, the positioning rod on the positioning seat guides the positioning plate, ensuring that a pair of positioning plates drive the corresponding turntable to move synchronously, so that the laser rangefinder and the reflector are in a corresponding state. The laser rangefinder emits and receives the reflected laser from the reflector to measure the width data of the current gap. Step 4: Rotate the turntable. Utilizing the connection between the turntable and the synchronous plate, drive the synchronous plate to rotate around the positioning shaft, causing the guide wheel that was originally in contact with the side wall of the gap to disengage from the gap. Relying on the continuous thrust of the lifting spring, drive the ball bearings at the end of the connecting frame on the back of the turntable to slide along the contraction ramp of the guide block, causing the turntable to contract and assisting the guide wheel of the next station to enter the gap. Once the ball bearings have slid to the positioning end face of the guide block, drive the guide wheel to reset and move through the lifting spring, so that the guide wheel is tightly in contact with the inner side wall of the gap. Step 5: Repeat the operation in Step 4, and rotate the turntable in sequence to switch the guide wheels at different distances from the rotation center, so that the guide wheels at different work positions are respectively attached to the inner sidewalls with different depths of gap. By measuring the corresponding distance between the laser rangefinder and the reflector, the gaps at different depths between the elevator landing door and the car door are accurately and efficiently detected, and the gap width data at each depth is recorded.

[0015] Compared with the prior art, the present invention has the following advantages: The turntable of this invention is equipped with multiple pairs of guide wheels at different distances from the rotation center. By rotating the turntable, the corresponding guide wheel can be quickly switched to fit the side wall of the elevator gap, adapting to the needs of gap detection at different depths. This structure, combined with the linkage design of the retracting ramp and the lifting spring, allows the turntable to retract inward as the guide wheel moves into the gap, assisting the guide wheel to smoothly extend into gaps of different depths. The lifting spring continuously provides elastic thrust, ensuring a tight fit between the guide wheel and the gap side wall, preventing loosening or deviation during measurement. The turntable can accurately convert the actual distance of the elevator gap into the measurement distance between the laser rangefinder and the reflector, avoiding the limitations of small gaps on equipment installation and leveraging the advantages of laser ranging to compensate for the insufficient accuracy of traditional contact measurement, achieving accurate detection of different depths in small gaps.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 A three-dimensional diagram of a laser measuring device for elevator installation gaps; Figure 2 A front view of a laser measuring device for elevator installation gaps; Figure 3 Corrosion diagram of a laser measuring device for elevator installation gaps; Figure 4 A rear view of a laser measuring device for elevator installation gaps; Figure 5 A partial view of a laser measuring device for elevator installation gaps Figure 1 ; Figure 6 A cross-sectional view of the limit cover of a laser measuring device for elevator installation gaps; Figure 7 A partial view of a laser measuring device for elevator installation gaps Figure 2 ; Figure 8 A partial view of a laser measuring device for elevator installation gaps Figure 3 .

[0018] In the diagram: 1. Frame; 11. Support leg; 12. Two-way lead screw shaft; 121. Knob; 122. Slider; 123. Clamping plate; 124. Slide rail; 13. Positioning plate; 131. Laser rangefinder; 132. Reflector; 133. Positioning rod; 134. Positioning seat; 14. Turntable; 141. Mounting hole; 142. Mounting seat; 143. Guide wheel; 144. Locking bolt; 2. Positioning shaft; 21. Synchronizing plate; 211. Limiting plate; 212. Limiting cover; 213. Top rod; 214. Baffle; 215. Lifting spring; 22. Fixing block; 221. Guide block; 222. Shrinkage ramp; 223. Positioning end face; 23. Connecting frame; 231. Ball bearing. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0020] Example 1:

[0021] like Figures 1 to 8 As shown, an elevator installation gap laser measuring device includes a frame 1. A clamping assembly is installed at the bottom of the frame 1 to install the frame 1 above the gap between the elevator landing door and the car door. A pair of turntables 14 are slidably arranged on the frame 1. The turntables 14 are used to fit against the inner sidewall of the gap. A laser rangefinder 131 and a reflector 132 are respectively installed on the top of the pair of turntables 14. The turntables 14 are used to convert the gap spacing into the distance between the laser rangefinder 131 and the reflector 132, and facilitate the installation of the device. Four pairs of guide wheels 143 are also installed on the turntable 14. The bottom guide wheel 143 is attached to the side wall of the gap. The four pairs of guide wheels 143 are at different distances from the rotation center of the turntable 14. By rotating the turntable 14, different guide wheels 143 are driven to attach to the side wall of the gap, and gaps of different depths are detected. A positioning shaft 2 is mounted on the frame 1, and a turntable 14 is movably mounted on the positioning shaft 2. A lifting spring 215 is installed between the positioning shaft 2 and the turntable 14. The lifting spring 215 is used to drive the turntable 14 to move to both sides. A retraction ramp 222 is mounted on the positioning shaft 2. When the guide wheel 143 moves into the gap, the retraction ramp 222 drives the turntable 14 to retract inward, and assists the guide wheel 143 to move into the gap.

[0022] like Figures 1 to 8As shown in the specific embodiment, the frame 1 is equipped with four support legs 11 at its bottom. Each of the four support legs 11 has an anti-slip pad on its bottom, and the support legs 11 rest on the end faces of the elevator landing door and the car door, respectively. The four support legs 11 allow the frame 1 to be placed stably, and the anti-slip pads at the bottom can effectively prevent the device from shifting before measurement, ensuring the stability of the frame 1 and laying the foundation for subsequent accurate measurement.

[0023] like Figures 1 to 8 As shown, the clamping assembly further includes a bidirectional lead screw 12, which is rotatably connected to the frame 1. A slider 122 is meshed on the bidirectional lead screw 12, a clamping plate 123 is mounted on the bottom of the slider 122, and a slide rail 124 is slidably mounted on the slider 122. The slide rail 124 is mounted on the side wall of the frame 1 and is horizontal. A knob 121 is mounted on the end of the bidirectional lead screw 12. By driving the bidirectional lead screw 12 to rotate through the knob 121, and coordinating with the guide effect of the slide rail 124 on the slider 122, the clamping plate 123 can be smoothly opened and closed, achieving a firm positioning of the device above the gap. The operation is convenient and the fixing effect is reliable.

[0024] like Figures 1 to 8 As shown, furthermore, a pair of positioning seats 134 are installed on the frame 1. The positioning seats 134 have countersunk grooves, and are bolted to the frame 1. Positioning rods 133 are installed on the positioning seats 134, and a pair of positioning plates 13 are slidably mounted on the positioning rods 133. The pair of positioning plates 13 are rotatably connected to the surfaces of a pair of turntables 14. A laser rangefinder is mounted on the top of one positioning plate 13, and a reflector 132 is mounted on the top of the other positioning plate 13, with the reflector 132 corresponding to the emitting end of the laser rangefinder. The positioning seats 134 are securely connected to the frame 1 via bolts, and the positioning rods 133 ensure smooth sliding of the positioning plates 13, thereby ensuring that the laser rangefinder 131 and the reflector 132 are always precisely aligned, improving the accuracy of the ranging data.

[0025] like Figures 1 to 8 As shown, the turntable 14 further includes several pairs of mounting holes 141. The extension lines of these mounting holes 141 intersect the rotation center of the turntable 14. Mounting seats 142 are mounted on the mounting holes 141, and locking bolts 144 are installed through the holes. The ends of the locking bolts 144 are screwed onto the surface of the mounting seats 142, and the locking bolts 144 drive the mounting seats 142 to connect with the mounting holes 141. Guide wheels 143 are mounted on the surface of the mounting seats 142. The mounting seats 142 are fixed to the mounting holes 141 by the locking bolts 144, ensuring the guide wheels 143 are securely installed and facilitating their disassembly and maintenance. The several pairs of mounting holes 141 provide a basis for the different positions of the guide wheels 143.

[0026] Example 2:

[0027] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a synchronous plate 21 is rotatably mounted on the positioning shaft 2. The synchronous plate 21 is circular. Limiting plates 211 are also installed at both ends of the positioning shaft 2. The limiting plates 211 fit against both ends of the synchronous plate 21 and are used to limit the position of the synchronous plate 21. A limiting cover 212 is installed on the synchronous plate 21, and a push rod 213 is inserted into the limiting cover 212. A turntable 14 is installed at the end of the push rod 213. The turntable 14 rotates synchronously with the synchronous plate 21. The synchronous plate 21 enables the synchronous rotation of a pair of turntables 14. The limiting plates 211 can limit the axial displacement of the synchronous plate 21, ensuring the synchronous rotation of the turntables 14 and improving the consistency of gap detection.

[0028] like Figures 1 to 8 As shown, a baffle 214 is slidably disposed inside the limiting cover 212. One end of the baffle 214 is connected to the end of the push rod 213, and a lifting spring 215 is snapped onto the other end of the baffle 214. The other end of the lifting spring 215 is snapped onto the end of the limiting cover 212. The compression direction of the lifting spring 215 and the movement direction of the push rod 213 are both on the same straight line, and the lifting spring 215 is used to drive the turntable 14 to slide towards the outer wall of the gap. The limiting cover 212 provides installation space for the baffle 214 and the lifting spring 215. The baffle 214 can ensure that the elastic force of the lifting spring 215 is accurately applied to the push rod 213, ensuring the stability of the force on the turntable 14, thereby making the guide wheel 143 fit tightly against the side wall of the gap.

[0029] like Figures 1 to 8 As shown, in a specific embodiment, a fixing block 22 is installed on the positioning shaft 2, and four guide blocks 221 are installed around the fixing block 22 in a uniform ring distribution. One end of each guide block 221 has a contraction ramp 222, and the end of the contraction ramp 222 has a positioning end face 223, which is a vertical surface. The positioning end face 223 is used to drive the turntable 14 to slide outward under the action of the lifting spring 215. A connecting frame 23 is installed on the back of the turntable 14, and a ball bearing 231 is installed at the end of the connecting frame 23. The surface of the ball bearing 231 is in contact with the end face of the guide block 221. The fixing block 22 provides stable support for the guide block 221. The contraction ramp 222 of the guide block 221 cooperates with the ball bearing 231 to assist the turntable 14 in retracting smoothly, while the positioning end face 223 can accurately position the turntable 14, improving the accuracy of detection of different depth gap switching.

[0030] This invention also discloses a laser measurement method for elevator installation gaps, the steps of which are as follows: Step 1: Place the entire device above the gap between the elevator landing door and the car door, so that the four support legs 11 at the bottom of the frame 1 rest on the end faces of the elevator landing door and the car door respectively. The anti-slip pads at the bottom of the support legs 11 enhance the stability of the device and prevent displacement before measurement. Step 2: Rotate the knob 121 at the end of the bidirectional lead screw shaft 12 to drive the bidirectional lead screw shaft 12 to rotate on the frame 1. Utilize the meshing connection between the bidirectional lead screw shaft 12 and the slider 122, as well as the sliding cooperation between the slider 122 and the slide rail 124 on the side wall of the frame 1, to drive the clamping plates 123 at the bottom of the slider 122 to move away from each other and press against the gap end face, thus completing the overall positioning and fixing of the device. Step 3: Relying on the elastic force of the lifting spring 215 on the positioning shaft 2, the push rod 213 is driven to move the turntable 14 to both sides, so that the bottom guide wheel 143 on the turntable 14 is precisely attached to the side wall of the gap, realizing the initial positioning of the turntable 14; at the same time, the positioning rod 133 on the positioning seat 134 guides the positioning plate 13, ensuring that a pair of positioning plates 13 drive the corresponding turntable 14 to move synchronously, so that the laser rangefinder 131 and the reflector 132 maintain a corresponding state, and the width data of the current gap is measured by emitting and receiving the reflected laser from the reflector 132 through the laser rangefinder 131; Step 4: Rotate turntable 14. Utilizing the connection between turntable 14 and synchronous plate 21, drive synchronous plate 21 to rotate around positioning shaft 2, causing guide wheel 143, which was originally in contact with the side wall of the gap, to disengage from the gap. Relying on the continuous thrust of lifting spring 215, drive the ball 231 at the end of the connecting frame 23 on the back of turntable 14 to slide along the contraction ramp 222 of guide block 221, causing turntable 14 to contract and assisting the guide wheel 143 of the next station to enter the gap. When the ball 231 slides to the positioning end face 223 of guide block 221, drive guide wheel 143 to reset and move through lifting spring 215, so that guide wheel 143 is tightly in contact with the inner side wall of the gap. Step 5: Repeat the operation of Step 4, and rotate the turntable 14 to switch the guide wheels 143 at different distances from the rotation center. Make the guide wheels 143 at different positions fit against the inner sidewalls with different depths of gaps. Through the corresponding distance measurement of the laser rangefinder 131 and the reflector 132, the precise and efficient detection of the gaps at different depths between the elevator landing door and the car door is completed, and the gap width data at each depth is recorded.

[0031] The implementation principle of the elevator installation gap laser measuring device of the present invention is as follows: In use, the device is first placed above the gap between the elevator landing door and the car door, so that the four support legs 11 at the bottom of the frame 1 respectively overlap the end faces of the elevator landing door and the car door. The anti-slip pads at the bottom of the support legs 11 can enhance the stability of the device after placement and avoid displacement during measurement, which would affect the accuracy. Then, by adjusting the position of the clamping assembly fixing device, the knob 121 at the end of the bidirectional lead screw shaft 12 is rotated, which drives the bidirectional lead screw shaft 12 to rotate on the frame 1. Since the bidirectional lead screw shaft 12 is meshed with the slider 122, and the slider 122 slides with the side wall of the frame 1 through the slide rail 124, the horizontal setting of the slide rail 124 can ensure that the slider 122 moves smoothly in the horizontal direction, thereby driving the clamping plates 123 at the bottom of the slider 122 to move away from each other and press against the gap end face, completing the overall positioning and fixing of the device, and ensuring that the position of the frame 1 remains stable during subsequent measurement.

[0032] After the device is fixed, the elastic force of the lifting spring 215 on the positioning shaft 2 drives the top rod 213 to move the turntable 14 to both sides, so that the bottom guide wheel 143 on the turntable 14 is precisely attached to the gap side wall, realizing the initial positioning of the turntable 14. At the same time, the positioning rod 133 on the positioning seat 134 guides the positioning plate 13, ensuring that a pair of positioning plates 13 drive the corresponding turntable 14 to move synchronously, so that the laser rangefinder 131 on the top of one positioning plate 13 and the reflector 132 on the top of the other positioning plate 13 always remain in a corresponding state. At this time, the turntable 14 converts the gap between the elevator landing door and the car door into the distance between the laser rangefinder 131 and the reflector 132. The laser rangefinder 131 emits laser light, which is reflected by the reflector 132 and then received, so that the width data of the current gap can be quickly measured.

[0033] When it is necessary to detect gaps of different depths, the turntable 14 is rotated. Since the turntable 14 is connected to the synchronous plate 21 through the push rod 213, the synchronous plate 21 can rotate around the positioning shaft 2, thereby driving a pair of turntables 14 to rotate synchronously, causing the guide wheel that was originally in contact with the side wall of the gap to disengage from the gap. At this time, under the continuous thrust of the lifting spring 215, the ball 231 at the end of the connecting frame 23 on the back of the turntable 14 slides along the contraction ramp 222 of the guide block 221, driving the turntable 14 to move, thereby driving the guide wheel 143 to contract synchronously, assisting the guide wheel 143 of the next station to smoothly enter the gap and tightly fit the side wall; when the ball 231 slides to the positioning end face 223 of the guide block 221, the lifting spring 215 drives the guide wheel to reset and move, finally making the guide wheel fit against the inner side wall of the gap.

[0034] The mounting holes 141 on the turntable 14 are fixedly connected to the mounting base 142 by locking bolts 144, ensuring that the guide wheel 143 is installed securely. The lifting spring 215 provides thrust throughout the switching process, ensuring that the new guide wheel fits tightly. Gap measurements at different depths can be accurately converted into the distance between the laser rangefinder 131 and the reflector 132. During the measurement process, the limiting plates 211 at both ends of the positioning shaft 2 can limit the axial displacement of the synchronization plate 21, and the baffle 214 inside the limiting cover 212 can ensure that the compression direction of the lifting spring 215 is consistent with the movement direction of the top rod 213, further improving the stability and measurement accuracy of the device operation, and realizing accurate and efficient detection of gaps at different depths between the elevator landing door and the car door.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser measuring device for elevator installation gaps, comprising a frame (1), characterized in that: The frame (1) is equipped with a clamping assembly at the bottom. The clamping assembly is used to install the frame (1) above the gap between the elevator landing door and the car door. A pair of turntables (14) are slidably arranged on the frame (1). The turntables (14) are used to fit against the inner sidewall of the gap. A laser rangefinder (131) and a reflector (132) are respectively installed on the top of the pair of turntables (14). The turntables (14) are used to convert the gap spacing into the distance between the laser rangefinder (131) and the reflector (132), and facilitate the installation of the equipment. The turntable (14) is also equipped with four pairs of guide wheels (143). The bottom guide wheel (143) is attached to the side wall of the gap. The four pairs of guide wheels (143) are at different distances from the rotation center of the turntable (14). By rotating the turntable (14), different guide wheels (143) are driven to attach to the side wall of the gap, and gaps of different depths are detected. A positioning shaft (2) is installed on the frame (1), and a turntable (14) is movably installed on the positioning shaft (2). A lifting spring (215) is installed between the positioning shaft (2) and the turntable (14). The lifting spring (215) is used to drive the turntable (14) to move to both sides. A shrinking ramp (222) is installed on the positioning shaft (2). When the shrinking ramp (222) drives the guide wheel (143) to move into the gap, it drives the turntable (14) to shrink inward, and assists the guide wheel (143) to move into the gap.

2. The elevator installation gap laser measuring device according to claim 1, characterized in that, The frame (1) is equipped with four support legs (11) at the bottom. Each of the four support legs (11) is equipped with an anti-slip pad. The support legs (11) are respectively attached to the end faces of the elevator landing door and the car door.

3. The elevator installation gap laser measuring device according to claim 1, characterized in that, The clamping assembly includes a bidirectional lead screw shaft (12), which is rotatably connected to the frame (1). A slider (122) is engaged on the bidirectional lead screw shaft (12). A clamping plate (123) is installed at the bottom of the slider (122). A slide rail (124) is slidably installed on the slider (122). The slide rail (124) is installed on the side wall of the frame (1) and is horizontal. A knob (121) is installed at the end of the bidirectional lead screw shaft (12).

4. The elevator installation gap laser measuring device according to claim 1, characterized in that, A pair of positioning seats (134) are installed on the frame (1). The positioning seats (134) have countersunk grooves and are connected to the frame (1) by bolts. A positioning rod (133) is installed on the positioning seat (134). A pair of positioning plates (13) are slidably installed on the positioning rod (133). The pair of positioning plates (13) are rotatably connected to the surfaces of a pair of turntables (14). A laser rangefinder is installed on the top of one of the positioning plates (13), and a reflector (132) is installed on the top of the other positioning plate (13). The reflector (132) corresponds to the laser rangefinder's transmitting end.

5. The elevator installation gap laser measuring device according to claim 1, characterized in that, The turntable (14) has several pairs of mounting holes (141), the extension lines of the several pairs of mounting holes (141) intersect the rotation center of the turntable (14), a mounting seat (142) is provided on the mounting hole (141), a locking bolt (144) is installed through the mounting hole (141), the end of the locking bolt (144) is screwed to the surface of the mounting seat (142), and the locking bolt (144) is used to drive the mounting seat (142) to connect with the mounting hole (141), and a guide wheel (143) is installed on the surface of the mounting seat (142).

6. The elevator installation gap laser measuring device according to claim 1, characterized in that, A synchronizing plate (21) is rotatably mounted on the positioning shaft (2). The synchronizing plate (21) is circular. Limiting plates (211) are also installed at both ends of the positioning shaft (2). The limiting plates (211) are attached to both ends of the synchronizing plate (21) and are used to limit the position of the synchronizing plate (21). A limiting cover (212) is installed on the synchronizing plate (21). A top rod (213) is inserted into the limiting cover (212). A turntable (14) is installed at the end of the top rod (213). The turntable (14) rotates synchronously with the synchronizing plate (21).

7. The elevator installation gap laser measuring device according to claim 6, characterized in that, A baffle (214) is slidably disposed inside the limiting cover (212). One end of the baffle (214) is connected to the end of the push rod (213). A lifting spring (215) is snapped onto the other end of the baffle (214). The other end of the lifting spring (215) is snapped onto the end of the limiting cover (212). The compression direction of the lifting spring (215) and the movement direction of the push rod (213) are both on the same straight line. The lifting spring (215) is used to drive the turntable (14) to slide towards the outer wall of the gap.

8. The elevator installation gap laser measuring device according to claim 1, characterized in that, A fixing block (22) is installed on the positioning shaft (2), and four guide blocks (221) are installed around the fixing block (22). The four guide blocks (221) are evenly distributed in a ring. A contraction ramp (222) is provided at one end of the guide block (221), and a positioning end face (223) is provided at the end of the contraction ramp (222). The positioning end face (223) is a vertical surface. The positioning end face (223) is used to drive the turntable (14) to slide outward under the action of the lifting spring (215).

9. The elevator installation gap laser measuring device according to claim 8, characterized in that, A connecting frame (23) is installed on the back of the turntable (14), and a ball bearing (231) is installed at the end of the connecting frame (23). The surface of the ball bearing (231) is attached to the end face of the guide block (221).

10. A laser measurement method for elevator installation gaps, characterized in that, The elevator installation gap laser measuring device according to any one of claims 1 to 9, and the elevator installation gap laser measuring method, comprises the following steps: Step 1: Place the entire device above the gap between the elevator landing door and the car door, so that the four support legs (11) at the bottom of the frame (1) respectively overlap the end faces of the elevator landing door and the car door. The anti-slip pads at the bottom of the support legs (11) enhance the stability of the device and prevent displacement before measurement. Step 2: Rotate the knob (121) at the end of the bidirectional lead screw shaft (12) to drive the bidirectional lead screw shaft (12) to rotate on the frame (1). Utilize the meshing connection between the bidirectional lead screw shaft (12) and the slider (122), as well as the sliding cooperation between the slider (122) and the slide rail (124) on the side wall of the frame (1), to drive the clamping plates (123) at the bottom of the slider (122) to move away from each other and press against the gap end face, thus completing the overall positioning and fixing of the device. Step 3: Relying on the elastic force of the lifting spring (215) on the positioning shaft (2), drive the top rod (213) to move the turntable (14) to both sides, so that the bottom guide wheel (143) on the turntable (14) is precisely attached to the side wall of the gap, and the initial positioning of the turntable (14) is achieved; at the same time, the positioning rod (133) on the positioning seat (134) guides the positioning plate (13), ensuring that a pair of positioning plates (13) drive the corresponding turntable (14) to move synchronously, so that the laser rangefinder (131) and the reflector (132) remain in a corresponding state, and the width data of the current gap is measured by emitting and receiving the reflected laser from the reflector (132) through the laser rangefinder (131); Step 4: Rotate the turntable (14) and use the connection between the turntable (14) and the synchronous plate (21) to drive the synchronous plate (21) to rotate around the positioning shaft (2), so that the guide wheel (143) that was originally attached to the side wall of the gap is disengaged from the gap; relying on the continuous thrust of the lifting spring (215), drive the ball (231) at the end of the connecting frame (23) on the back of the turntable (14) to slide along the contraction ramp (222) of the guide block (221), drive the turntable (14) to contract, and assist the guide wheel (143) of the next station to enter the gap; when the ball (231) slides to the positioning end face (223) of the guide block (221), drive the guide wheel (143) to reset and move through the lifting spring (215), so that the guide wheel (143) is tightly attached to the inner side wall of the gap; Step 5: Repeat the operation of Step 4, and rotate the turntable (14) in sequence to switch the guide wheels (143) at different distances from the rotation center, so that the guide wheels (143) at different work positions are respectively attached to the inner sidewalls with different depths of gap. Through the corresponding distance measurement of the laser rangefinder (131) and the reflector (132), the precise and efficient detection of the gaps at different depths between the elevator landing door and the car door is completed, and the gap width data at each depth is recorded.

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