Elevator light curtain anti-collision device

Abstract

An elevator light curtain anti-collision device comprises an infrared transmitting tube and an infrared receiving tube, the infrared transmitting tube and the infrared receiving tube are provided with corresponding adjusting mechanisms respectively, each adjusting mechanism comprises an installation plate, the infrared transmitting tube and the infrared receiving tube are installed on the corresponding installation plates respectively, two first nuts are fixedly installed on the installation plates, and the two first nuts are connected with the two first nuts. The same threaded rod is installed in the first nut in a threaded fit mode, and the infrared transmitting tube and the infrared receiving tube are each provided with a box body corresponding to the infrared transmitting tube and the infrared receiving tube. The dustproof device is simple in structure and ingenious in conception, a dustproof effect can be achieved through the transparent plate, when the driving mechanism drives the transparent plate to move front and back, the rubber strip-shaped scraper can scrape off dust attached to the transparent plate, and therefore it is guaranteed that light emitted by the infrared transmitting tube can be normally transmitted, the infrared receiving tube can normally receive the light, and the service life of the infrared receiving tube is prolonged. And when the transparent plate is scraped, normal propagation of light rays is not affected, and the device can be normally used, can meet actual requirements and is suitable for popularization.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator light curtains, and specifically relates to an anti-collision device for elevator light curtains. Background Art

[0002] An elevator light curtain is a light-type elevator door safety protection device applicable to passenger elevators and freight elevators to protect the safety of passengers. It consists of an infrared transmitter and a receiver installed on both sides of the elevator car door, a power supply box installed on the car top, and a special flexible cable. There are infrared emitting tubes in the transmitter. Under the control of the MCU, the transmitting and receiving tubes are turned on in sequence, continuously scanning the car door area from top to bottom to form a dense infrared protection light curtain. When any one of the light beams is blocked, the control system immediately outputs an opening signal, and the car door stops closing and reverses to open until the passenger or the blocking object leaves the warning area, and then the elevator door can be normally closed. However, when the outer surfaces of the infrared emitting tubes or infrared receiving tubes are covered with dust, it will hinder the propagation of light and affect the normal use of the emitting tubes or receiving tubes. Therefore, it is necessary to remove the dust to ensure the normal function of the elevator light curtain. Therefore, we designed an anti-collision device for elevator light curtains that can remove dust. Content of the Utility Model

[0003] The utility model provides an anti-collision device for elevator light curtains to solve the defects in the prior art.

[0004] The utility model is realized through the following technical solutions:

[0005] An anti-collision device for elevator light curtains includes infrared emitting tubes and infrared receiving tubes. Corresponding adjusting mechanisms are respectively provided for the infrared emitting tubes and infrared receiving tubes. The adjusting mechanisms respectively include mounting plates. The infrared emitting tubes and infrared receiving tubes are respectively mounted on the corresponding mounting plates. Two first nuts are fixedly mounted on the mounting plates. The same threaded rod is threadedly engaged with the first nuts. The infrared emitting tubes and infrared receiving tubes are respectively provided with corresponding boxes. The infrared emitting tubes and infrared receiving tubes are arranged in the boxes. One side of each box is open, and a box cover is detachably provided. The threaded rod is rotatably mounted in the corresponding box, and one end of the threaded rod extends to the outside of the box. The first nuts are rectangular, and one side of the first nut is in contact with the inner wall of the box. Through grooves are respectively opened on the opposite sides of the box. The infrared light emitted by the infrared emitting tubes and infrared receiving tubes can pass through the through grooves and shoot out of the box. Fixing plates are respectively fixedly mounted on the opposite sides of the box. Several through holes are opened on the fixing plates. A movable transparent plate is provided in the box. Rubber strip-shaped scrapers are slidably engaged on the side of the transparent plate opposite to the through grooves. There are two rubber strip-shaped scrapers in the box, front and back. The rubber strip-shaped scrapers are fixedly mounted on the inner wall of the box. Driving mechanisms for driving the transparent plate to move back and forth are respectively provided in the boxes.

[0006] An elevator light curtain anti-collision device as described above, wherein the driving mechanism includes a second nut. A second nut is fixedly installed on one side of the transparent plate, and a dovetail slider is fixedly installed on the other side of the transparent plate. A dovetail chute is formed on the inner wall of the box body, and the dovetail slider is slidably installed in the dovetail chute. A coaxial lead screw is installed in the second nut by internal thread fit, and the lead screw is rotatably installed in the box body. A coaxial gear is fixedly installed on the lead screw, and a rack is meshed and fitted on one side of the gear. One end of the rack is fixedly connected to a spring rod, and the spring rod is fixedly installed in the box body. The other end of the rack is fixedly installed with a push rod. Avoidance holes are respectively formed on the box body, and one end of the push rod passes through the avoidance hole and extends to the outside of the box body. The push rods on the two box bodies are distributed in a staggered manner.

[0007] An elevator light curtain anti-collision device as described above, wherein the push rod includes an internally threaded pipe and an inner rod with an external thread, and the internally threaded pipe and the inner rod are connected by thread fit.

[0008] An elevator light curtain anti-collision device as described above, wherein cross plates are respectively fixedly installed on the upper and lower sides of the rubber strip-shaped scraper. One side of the cross plate is in sliding contact and fit with the transparent plate, and the other side of the cross plate is respectively fixedly connected to the inner wall of the box body.

[0009] An elevator light curtain anti-collision device as described above, wherein a coaxial handwheel is fixedly installed on the threaded rod.

[0010] An elevator light curtain anti-collision device as described above, wherein a plurality of countersunk holes are formed on the box cover, and corresponding threaded holes are formed on one side of the opening of the box body. The box cover is installed on the box body by bolts.

[0011] The advantages of the present utility model are as follows: The structure of the present utility model is simple and ingenious. The transparent plate can play a role in dust prevention. When the driving mechanism drives the transparent plate to move back and forth, the rubber strip-shaped scraper can scrape off the dust attached to the transparent plate, so as to ensure that the light emitted by the infrared emitting tube can propagate normally and the infrared receiving tube can receive light normally. Moreover, when the transparent plate is being scraped for dust, it will not affect the normal propagation of light, and the device can be used normally, which can meet the actual needs and is suitable for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of the present utility model; Figure 2 is Figure 1 a cross-sectional view of the A-direction view ofFigure 3 is Figure 1 a sectional view of the B-direction view of Figure 4 is Figure 1 a sectional view of the C-direction view of

[0014] Reference numerals: 1, infrared emission tube; 2, infrared receiving tube; 3, mounting plate; 4, first nut; 5, threaded rod; 6, box body; 7, through slot; 8, fixing plate; 9, transparent plate; 10, rubber strip squeegee; 11, box cover; 12, countersunk hole; 13, threaded hole; 15, through hole; 20, second nut; 21, dovetail slider; 22, dovetail chute; 23, lead screw; 24, gear; 25, rack; 26, spring rod; 27, push rod; 28, avoidance hole; 30, inner rod; 31, internally threaded tube; 40, cross plate; 50, hand wheel. Detailed implementation manners

[0015] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] An elevator light curtain anti-collision device, as shown in Figure 1 , 2, as shown in Figures 3 and 4, it includes an infrared emitting tube 1 and an infrared receiving tube 2. The infrared emitting tube 1 and the infrared receiving tube 2 are respectively provided with corresponding adjusting mechanisms. The adjusting mechanisms respectively include mounting plates 3. The infrared emitting tube 1 and the infrared receiving tube 2 are respectively mounted on the corresponding mounting plates 3. The mounting holes on the infrared emitting tube 1 and the infrared receiving tube 2 are respectively connected to the reserved holes on the mounting plates 3 through bolts. Two first nuts 4 are fixedly mounted on the mounting plates 3. The same threaded rod 5 is threadedly engaged and installed in the first nuts 4. The infrared emitting tube 1 and the infrared receiving tube 2 are respectively provided with corresponding boxes 6. The infrared emitting tube 1 and the infrared receiving tube 2 are arranged in the boxes 6. One side of each box 6 is open, and a box cover 11 is detachably provided. The threaded rod 5 is rotatably mounted in the corresponding box 6. One end of the threaded rod 5 extends to the outside of the box 6. The upper end of the threaded rod 5 is rotatably mounted on the inner wall of the box 6 through a bearing. The lower end of the threaded rod 5 is rotatably mounted in the reserved hole on the box 6 through a bearing. The first nut 4 is rectangular, and one side of the first nut 4 is in contact with the inner wall of the box 6. Through slots 7 are respectively opened on the opposite sides of the box 6. The infrared light emitted by the infrared emitting tube 1 and the infrared receiving tube 2 can be emitted from the box 6 through the through slots 7. Fixing plates 8 are respectively fixedly mounted on the opposite sides of the box 6. Several through holes 15 are opened on the fixing plates 8. A movable transparent plate 9 is provided in the box 6. The transparent plate 9 is rectangular and an outer frame is fixedly mounted on its outer periphery. Rubber strip scrapers 10 are slidably engaged with the side of the transparent plate 9 opposite to the through slots 7. There are two front and rear rubber strip scrapers 10 in the box 6. The rubber strip scrapers 10 are fixedly mounted on the inner wall of the box 6. Driving mechanisms for driving the transparent plate 9 to move back and forth are respectively provided in the box 6. The structure of the utility model is simple and ingenious. The transparent plate 9 can play a dust-proof role. When the driving mechanism drives the transparent plate 9 to move back and forth, the rubber strip scrapers 10 can scrape off the dust attached to the transparent plate 9, so as to ensure that the light emitted by the infrared emitting tube 1 can be normally transmitted and the infrared receiving tube 2 can normally receive light. Moreover, when the transparent plate 9 is being dusted, it will not affect the normal transmission of light, and the device can be normally used, can meet the actual needs, and is suitable for popularization.When using the utility model, remove the box cover 11, install the infrared emitting tube 1 and the infrared receiving tube 2 into the corresponding box body 6, then cover the box cover 11, and then install the box body 6 on the elevator doors on both sides of the elevator in sequence through the through holes 15 on the bolts and the fixing plate 8. After the box body 6 is installed, rotate the threaded rod 5. Since one side of the rectangular first nut 4 on the threaded rod 5 fits against the inner wall of the box body 6, the first nut 4 cannot rotate with the threaded rod 5. When the threaded rod 5 rotates, it drives the first nut 4 to move up or down, thereby driving the infrared emitting tube 1 or the infrared receiving tube 2 to move, so as to adjust the position to where the infrared receiving tube 2 can receive all the light emitted by the infrared emitting tube 1, and the installation of this device is completed. When in use, the transparent plate 9 plays a role in dust prevention. When the driving mechanism drives the transparent plate 9 to move back and forth, the rubber strip-shaped scraper 10 can scrape off the dust attached to the transparent plate 9. During this process, the transparent plate 9 always blocks the infrared emitting tube 1 and the infrared receiving tube 2, and the infrared light passes through the transparent plate 9 and the through groove 7 and is received by the infrared receiving tube 2.

[0017] Specifically, as shown in the figure, the driving mechanism in this embodiment includes a second lead nut 20. One side of the transparent plate 9 is fixedly installed with the second lead nut 20, and the other side of the transparent plate 9 is fixedly installed with a dovetail slider 21. A dovetail chute 22 is formed on the inner wall of the box body 6, and the dovetail slider 21 is slidably installed in the dovetail chute 22. A coaxial lead screw 23 is installed in the second lead nut 20 by internal thread fit. The lead screw 23 is rotatably installed in the box body 6. One end of the lead screw 23 is rotatably installed at the rear side of the box body 6 through a bearing, and the other end of the lead screw 23 is rotatably installed at the bottom of the box body 6 through a pedestal bearing. A coaxial gear 24 is fixedly installed on the lead screw 23. The inner circumference of the gear 24 is fixedly connected to the outer circumference of the lead screw 23. A rack 25 is meshed and cooperated with one side of the gear 24. One end of the rack 25 is fixedly connected to a spring rod 26. The spring rod 26 is fixedly installed in the box body 6. The fixed end of the spring rod 26 is fixedly connected to the inner wall of the box body 6 through a mounting block. The movable end of the spring rod 26 is fixedly connected to the rack 25. The other end of the rack 25 is fixedly installed with a push rod 27. Avoidance holes 28 are respectively formed on the box body 6. One end of the push rod 27 passes through the avoidance hole 28 and extends to the outside of the box body 6. The push rods 27 on the two box bodies 6 are staggeredly distributed. One push rod 27 is located on the side close to the box cover 11, and the other push rod 27 is located on the side far from the box cover 11. After installing the two box bodies 6 on the elevator door, when the elevator door closes, the elevator door gives a thrust to the push rod 27 on the opposite elevator door. The part of the push rod 27 located outside the box body 6 is pushed into the box body 6. At this time, the push rod 27 pushes the rack 25 to move, and the spring rod 26 is compressed. The movement of the rack 25 drives the gear 24 and the lead screw 23 to rotate. At the same time, the first lead nut 20 and the transparent plate 9 cannot follow the rotation of the lead screw 23 under the restriction of the dovetail slider 21 and the dovetail chute 22, so that the transparent plate 9 and the second lead nut 20 move back and forth on the lead screw 23. When the transparent plate 9 moves, the dovetail slider 21 slides in the dovetail chute 22. When the elevator door opens, the push rod 27 is no longer stressed, and the rack 25 and the push rod 27 automatically reset under the action of the spring rod 26, thereby driving the second lead nut 20 and the transparent plate 9 to automatically reset for the next use.

[0018] Specifically, as shown in the figure, the push rod 27 in this embodiment includes an internally threaded tube 31 and an inner rod 30 with an external thread. The internally threaded tube 31 and the inner rod 30 are threadedly connected. When it is not necessary to scrape the ash on the transparent plate 9, turn the internally threaded tube 31 to make it move along the inner rod 30 until the internally threaded rod 31 cannot contact the opposite elevator door when the elevator door is closed. Then the push rod 27 cannot drive the rack 25 to move, and the transparent plate 9 will not move. When it is necessary to scrape the ash on the transparent plate 9, turn the internally threaded tube 31 again so that it can contact the opposite elevator door when the elevator door is closed.

[0019] Further, as shown in the figure, cross plates 40 are fixedly installed on the upper and lower sides of the rubber strip-shaped scraper 10 in this embodiment. One side of each cross plate 40 is in sliding contact with the transparent plate 9, and the other side of each cross plate 40 is fixedly connected to the inner wall of the box body 6. The cross plates 40 can prevent external dust from floating onto the infrared emitter 1 and the infrared receiver 2 from the upper and lower side spaces of the transparent plate 9, ensuring the sealing performance and further avoiding the influence of dust on the infrared emitter 1 and the infrared receiver 2.

[0020] Furthermore, as shown in the figure, a coaxial handwheel 50 is fixedly installed on the threaded rod 5 in this embodiment. It is more convenient and labor-saving to rotate the threaded rod 5 through the handwheel 50.

[0021] Furthermore, as shown in the figure, several countersunk holes 12 are formed in the box cover 11 in this embodiment, and corresponding threaded holes 13 are formed in one side of the opening of the box body 6. The box cover 11 is installed on the box body 6 through bolts. Place the box cover 11 on the box body 6, align the countersunk holes 12 with the corresponding threaded holes 13, and then screw in the bolts to complete the installation of the box cover 11. When disassembling, unscrew the bolts.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An elevator light curtain anti-collision device, comprising an infrared transmitting tube (1) and an infrared receiving tube (2), wherein the infrared transmitting tube (1) and the infrared receiving tube (2) are respectively provided with corresponding adjustment mechanisms, wherein the adjustment mechanisms respectively comprise mounting plates (3), wherein the infrared transmitting tube (1) and the infrared receiving tube (2) are respectively mounted on corresponding mounting plates (3), wherein two first screw nuts (4) are fixedly mounted on the mounting plates (3), wherein the internal threads of the first screw nuts (4) are matched to mount the same threaded rod (5), wherein: The infrared transmitting tube (1) and the infrared receiving tube (2) are respectively provided with a box body (6) corresponding thereto. The infrared transmitting tube (1) and the infrared receiving tube (2) are arranged in the box body (6). One side of the box body (6) is respectively opened and a box cover (11) is detachably provided. The threaded rod (5) is rotatably installed in the corresponding box body (6). One end of the threaded rod (5) extends to the outside of the box body (6). The first nut (4) is rectangular. One side of the first nut (4) is in contact with the inner wall of the box body (6). The opposite side of the box body (6) is respectively provided with a through groove (7). The infrared transmitting tube (1) and the infrared receiving tube (2) are respectively provided with a through groove (7). ) can emit infrared light from the box body (6) through the through groove (7). A fixed plate (8) is fixedly installed on the opposite side of the box body (6). A plurality of through holes (15) are provided on the fixed plate (8). A movable transparent plate (9) is provided in the box body (6). A rubber strip scraper (10) is provided on the side of the transparent plate (9) that is slidably matched with the through groove (7). The box body (6) is provided with two front and rear rubber strip scrapers (10). The rubber strip scrapers (10) are fixedly installed on the inner wall of the box body (6). A driving mechanism for driving the transparent plate (9) to move forward and backward is provided in the box body (6).

2. An elevator light curtain anti-collision device according to claim 1, characterized in that: The driving mechanism comprises a second nut (20), the second nut (20) is fixedly mounted on one side of the transparent plate (9), a dovetail slider (21) is fixedly mounted on the other side of the transparent plate (9), a dovetail slot (22) is provided on the inner wall of the box body (6), the dovetail slider (21) is slidably mounted in the dovetail slot (22), the inner thread of the second nut (20) is matched with a coaxial screw rod (23), the screw rod (23) is rotatably mounted in the box body (6), and the screw rod (23) is fixedly mounted with the same The gear (24) of the shaft is meshed with a rack (25) on one side of the gear (24), one end of the rack (25) is fixedly connected to a spring rod (26), the spring rod (26) is fixedly installed in the box body (6), the other end of the rack (25) is fixedly installed with a push rod (27), the box body (6) is respectively provided with avoidance holes (28), one end of the push rod (27) passes through the avoidance hole (28) and extends to the outside of the box body (6), and the push rods (27) on the two box bodies (6) are staggered.

3. An elevator light curtain anti-collision device according to claim 2, characterized in that: The push rod (27) comprises an internally threaded tube (31) and an internal rod (30) with external threads, and the internally threaded tube (31) and the internal rod (30) are threadedly connected.

4. The elevator light curtain anti-collision device according to claim 1, characterized in that: The upper and lower sides of the rubber strip scraper (10) are respectively fixedly mounted with transverse plates (40), one side of the transverse plate (40) is respectively in sliding contact with the transparent plate (9), and the other side of the transverse plate (40) is respectively fixedly connected to the inner wall of the box body (6).

5. The elevator light curtain anti-collision device according to claim 1, characterized in that: A coaxial hand wheel (50) is fixedly mounted on the threaded rod (5).

6. The elevator light curtain anti-collision device according to claim 1, characterized in that: The box cover (11) is provided with a plurality of countersunk holes (12), and a corresponding threaded hole (13) is provided on one side of the opening of the box body (6). The box cover (11) is mounted on the box body (6) by means of bolts.

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