Surrounding type elevator

Abstract

The utility model discloses a surrounding type elevator which comprises a hole formed in a stage surface, an inwards-concave step is arranged at the upper end of the hole, a platen is arranged at the inwards-concave step, the top face of the platen is flush with the stage surface, the platen is connected with a bottom plate through a lifting mechanism, the bottom plate is fixed to the bottom face of the hole, and an annular anti-falling net is arranged at the bottom of the platen. A plurality of connecting rods distributed in the circumferential direction are arranged on the anti-falling net, the outer side ends of the connecting rods are close to the edge of the platen, the inner side ends of the connecting rods point to the central axis of the platen, the connecting rods are slidably connected with the platen, locking mechanisms are arranged between the connecting rods and the platen, and compression springs are arranged between the connecting rods and the platen; a plurality of sensors are arranged on the periphery of the platen, a controller is arranged on the bottom face of the platen, and the locking mechanism and the sensors are connected with the controller. The utility model has the advantage that the occurrence rate of safety accidents can be reduced.

Description

Technical Field

[0001] The utility model belongs to the field of elevators, and in particular relates to a surround-type lifting elevator. Background Art

[0002] In stage performances, for dramatic effect, actors often need to be lifted using a lift. Existing lifts consist of a base plate and a platform above it. The base plate is connected to the platform via a multi-link scissor-type structure. A hydraulic cylinder is installed on the base plate or the scissor-type structure to raise the platform. The lift is placed within a sunken hole in the stage. Initially, the platform is flush with the stage surface. The hydraulic cylinder raises the platform, raising the actors on it.

[0003] The existing lifting platform has the following defects: in order to make the entire stage surface flat when the lifting platform is not in use, there is no fence on the stage. Setting up a fence will hinder the actors' free movement, but this will lead to the risk of the actors on it falling after the stage is raised, which may cause safety accidents; when the stage is raised, the holes on the stage are exposed, and some actors who are still performing on the stage may fall into the holes if they are not careful, causing safety accidents.

[0004] Therefore, the existing lifting platform is used for the stage and has the defect of easily causing safety accidents. Utility Model Content

[0005] The purpose of the utility model is to provide a surround-type lift elevator. The utility model has the advantage of reducing the incidence of safety accidents.

[0006] The technical solution of the utility model is as follows: a surround-type lifting elevator, comprising a hole arranged on a stage deck, an inner concave step provided at the upper end of the hole, a platform provided at the inner concave step, the top surface of the platform flush with the stage deck, the platform connected to the bottom plate through a lifting mechanism, the bottom plate is fixed to the bottom surface of the hole, an annular anti-falling net is provided at the bottom of the platform, a plurality of circumferentially distributed connecting rods are provided on the anti-falling net, the outer end of the connecting rod is close to the edge of the platform, the inner end of the connecting rod points to the central axis of the platform, the connecting rod is slidably connected to the platform, a locking mechanism is provided between the connecting rod and the platform, a compression spring is provided between the connecting rod and the platform; a plurality of sensors are provided on the outer periphery of the platform, a controller is provided on the bottom surface of the platform, and the locking mechanism and the sensor are both connected to the controller.

[0007] In the aforementioned surround-type elevator, the anti-fall net includes an outer rope and an inner rope, both of which are annular. The outer rope and the inner rope are inelastic ropes, both of which are in a relaxed state. A plurality of elastic ropes, both of which are annular, are arranged between the outer rope and the inner rope, and the elastic ropes are in a taut state. The net also includes a plurality of circumferentially distributed connecting ropes, which point to the central axis of the platform. The outer rope, the inner rope and the elastic rope are all fixed to the connecting rope.

[0008] In the aforementioned surround-type elevator, the lifting mechanism includes N coaxially nested telescopic tubes, adjacent telescopic tubes are slidably connected, adjacent telescopic tubes are linked and can achieve axial relative movement, and are arranged from the outside to the inside. The lower end of the first telescopic tube is fixed to the base plate, and the upper end of the Nth telescopic tube is fixed to the platform. A screw is provided inside the Nth telescopic tube, and a drive plate is provided at the lower end of the second telescopic tube. The lower end of the screw passes through the drive plate and is rotatably connected to the base plate. A motor is provided on the base plate, and a driving gear is provided at the output end of the motor. A passive gear connected to the screw is provided on one side of the driving gear.

[0009] In the aforementioned surround-type elevator, linkage mechanisms are provided on the second to N-1 telescopic tubes. The linkage mechanism on the Mth telescopic tube includes two pulleys located at the upper and lower ends of the Mth telescopic tube, respectively, with an annular drive rope provided between the upper and lower pulleys. The outer portion of the upper end of the drive rope is connected to the M-1th telescopic tube via a first bracket, and the inner portion of the lower end of the drive rope is connected to the M+1th telescopic tube via a second bracket, where M is any integer between 2 and N-1.

[0010] In the aforementioned surround-type elevator, the telescopic tubes are all square tubes, and both sides of the second to N-1th telescopic tubes are linked by linkage mechanisms.

[0011] In the aforementioned surround-type elevator, there are four telescopic tubes.

[0012] In the aforementioned surround-type elevator, a limiting plate is provided at the upper end of the screw.

[0013] In the aforementioned surround-type elevator, a flange is provided at the lower end of the screw, which is connected to the base plate via a plane bearing. A deep groove ball bearing connected to the screw is provided on the upper side of the flange, which is connected to the first telescopic tube or base plate via a third bracket.

[0014] In the aforementioned surround-type elevator, a ring-shaped protective plate is provided at the bottom of the platform. The protective plate is placed on the bottom surface of the concave step, and the inner circle of the protective plate is close to the lifting mechanism. A support structure is provided between the protective plate and the platform, and the support structure is located on the inner side of the anti-fall net.

[0015] In the aforementioned surround-type elevator, an annular light strip is embedded on the top surface of the platform, and the light strip is close to the outer edge of the platform.

[0016] Compared with the prior art, the present invention has made the following improvements on the basis of the existing lifting platform: 1) A sensor is set on the outer periphery of the platform. When an actor falls from the platform, the sensor generates a signal and transmits it to the controller. The controller opens the locking mechanism, which allows the connecting rod to extend, driving the anti-fall net at the bottom of the platform to extend, forming a surrounding protective area on the platform to catch the falling person, thereby reducing the incidence of safety accidents. 2) The scissors-type structure is replaced by the lifting mechanism in the present invention. The outer shape is a closed cylindrical shape, which cooperates with the protective plate to always form a closure on the hole, which can effectively prevent the actors on the stage from falling into the hole, further reducing the incidence of safety accidents. Therefore, the present invention has the advantage of reducing the incidence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the present utility model.

[0018] Figure 2 It is a schematic diagram of the tabletop viewed from above.

[0019] Figure 3 It is a schematic diagram of the connection between the connecting rod and the table.

[0020] Figure 4 It is a structural diagram of the linkage mechanism on the second telescopic tube.

[0021] The markings in the attached figure are: 1-stage surface, 2-hole, 3-concave step, 4-stage, 5-lifting mechanism, 6-anti-fall net, 7-connecting rod, 8-locking mechanism, 9-compression spring, 10-sensor, 11-controller, 12-outer cable, 13-inner cable, 14-elastic cable, 15-connecting cable, 16-telescopic tube, 17-linkage mechanism, 18-bottom plate, 19-screw, 20-drive plate, 21-motor, 22-driving gear Wheel, 23-passive gear, 24-pulley, 25-drive rope, 26-first bracket, 27-second bracket, 28-limiting plate, 29-flange, 30-plane bearing, 31-deep groove ball bearing, 32-third bracket, 33-protective plate, 34-support structure, 35-slider, 36-slide rail, 37-baffle, 38-fourth bracket, 39-fifth bracket, 40-guide column, 41-linear bearing, 42-electromagnetic telescopic rod. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] Embodiment. A wraparound lift, such as Figure 1As shown, it includes a hole 2 set on the stage surface 1, an inward-concave step 3 is provided at the upper end of the hole 2, a platform 4 is provided at the inward-concave step 3, the top surface of the platform 4 is flush with the stage surface 1, the platform 4 is connected to the bottom plate 18 through a lifting mechanism 5, the bottom plate 18 is fixed to the bottom surface of the hole 2, an annular anti-falling net 6 is provided at the bottom of the platform 4, and a plurality of circumferentially distributed connecting rods 7 are provided on the anti-falling net 6, the outer end of the connecting rod 7 is close to the edge of the platform 4, the inner end of the connecting rod 7 points to the central axis of the platform 4, the connecting rod 7 is slidably connected to the platform 4, and a locking device is provided between the connecting rod 7 and the platform 4. A compression spring 9 is provided between the mechanism 8, the connecting rod 7, and the table 4; a plurality of sensors 10 are provided on the outer periphery of the table 4, with the detection direction of the sensor 10 being inclined upward at 45-60 degrees (to detect a falling person as early as possible, leaving sufficient time for the extension of the connecting rod 7). The distance between adjacent sensors 10 does not exceed 0.5 meters. The sensor 10 is an infrared sensor, such as the model HC-SR501. A controller 11 is provided in the middle of the bottom surface of the table 4. The locking mechanism 8 and the sensor 10 are both connected to the controller 11, which can be an fx2n series PLC. The controller 11 is connected to the mains, or a battery fixed to the table 4 is provided on one side of the controller 11. The controller 11 draws power from the battery, and the battery charging port is connected to the top surface of the table 4.

[0024] like Figure 2 As shown, the anti-fall net 6 includes an outer rope 12 and an inner rope 13, both of which are annular. Both the outer rope 12 and the inner rope 13 are inelastic ropes, which can be made of nylon. The outer rope 12 and the inner rope 13 are both in a relaxed state. When the connecting rod 7 is extended to the extreme position (extended 1.2-1.5 meters), the outer rope 12 and the inner rope 13 are tightened. A plurality of elastic ropes 14, each of which is annular, are arranged between the outer rope 12 and the inner rope 13. The elastic ropes 14 are in a taut state, which keeps the anti-fall net 6 in a flat state, avoiding being seen by the audience and improving the visual effect. The anti-fall net 6 also includes a plurality of circumferentially distributed connecting ropes 15, which point to the central axis of the platform 4. The outer rope 12, the inner rope 13, and the elastic ropes 14 are all fixed to the connecting ropes 15. When someone falls on the anti-fall net 6, since the inner and outer ropes are inelastic and the middle elastic rope 14 is elastic, the anti-fall net 6 will form a bag shape, which can better wrap the falling person and prevent him from rolling outward or inward, thereby improving safety.

[0025] like Figure 3As shown, the inner end of the connecting rod 7 is provided with a slider 35, and the bottom of the table 4 is provided with a slide rail 36 that cooperates with the slider 35. The outer end of the slide rail 36 is provided with a baffle 37 that limits the slider 35 from moving outward. One side of the inner end of the slide rail 36 is provided with a fourth bracket 38 that extends downward and is fixed to the table 4. The outer end of the connecting rod 7 is provided with a fifth bracket 39. A guide post 40 is provided between the fourth bracket 38 and the fifth bracket 39. The guide post 40 is provided with a spiral compression spring 9. One end of the guide post 40 is fixed to the fifth bracket 39, and the other end of the guide post 40 passes through the fourth bracket 38 and maintains a sliding connection. The anti-fall net 6 passes between the compression spring 9 and the connecting rod 7 and is fixed to the bottom of the connecting rod 7. The locking mechanism 8 is provided on the linear bearing 41 on the inner end of the connecting rod 7 and an electromagnetic telescopic rod 42 fixed to the bottom of the table 4. The telescopic end of the electromagnetic telescopic rod 42 is inserted into the linear bearing 41, and the electromagnetic telescopic rod 42 is connected to the controller. Under normal circumstances, the telescopic end of the electromagnetic telescopic rod 42 is inserted into the linear bearing 41, preventing the connecting rod 7 from moving outward. When the controller 11 retracts the electromagnetic telescopic rod 42, it separates from the linear bearing 41. Under the elastic force of the compression spring 9, the connecting rod 7 extends outward, driving the anti-fall net 6 outward. To improve response speed, while ensuring sufficient strength, the connecting rod 7 and guide post 40 are preferably hollow and made of a low-density material, such as an aluminum alloy tube.

[0026] The lifting mechanism 5 includes four coaxially nested telescopic tubes 16 , each of which is a square tube. Adjacent telescopic tubes 16 are slidably connected.

[0027] Sorting the meter from the outside to the inside, the lower end of the first telescopic tube 16 is fixed to the base plate 18, the upper end of the fourth telescopic tube 16 is fixed to the table 4, a screw 19 is provided inside the fourth telescopic tube 16, and a drive plate 20 is provided at the lower end of the second telescopic tube 16. The lower end of the screw 19 passes through the drive plate 20 and is rotatably connected to the base plate 18. A motor 21 is provided on the base plate 18, and a driving gear 22 is provided at the output end of the motor 21. A driven gear 23 connected to the screw 19 is provided on one side of the driving gear 22.

[0028] Both sides of the second and third telescopic tubes 16 are provided with linkage mechanisms 17. The provision of linkage mechanisms 17 on both sides can make the telescopic action smoother, with less wear, longer service life and better safety. Figure 4As shown, the linkage mechanism 17 on the Mth telescopic tube 16 includes two rotatable pulleys 24, respectively, located at the upper and lower ends of the Mth telescopic tube 16. An annular drive rope 25 is interposed between the upper and lower pulleys 24. The outer portion of the upper end of the drive rope 25 is connected to the M-1th telescopic tube 16 via a first bracket 26, and the inner portion of the lower end of the drive rope 25 is connected to the M+1th telescopic tube 16 via a second bracket 27, where M is two or three. When the second telescopic tube 16 rises, the left side of the corresponding drive rope 25 is restrained by the first telescopic tube 16, and the drive rope 25 rotates counterclockwise, causing the third telescopic tube 16 to rise relative to the second telescopic tube 16. Similarly, the fourth telescopic tube 16 rises relative to the third telescopic tube 16, thereby raising the platform.

[0029] A limit plate 28 is provided at the upper end of the screw rod 19 for limiting the maximum rising height of the table. A flange 29 is provided at the lower end of the screw rod 19 , and the flange 29 is connected to the base plate 18 through a plane bearing 30 . A deep groove ball bearing 31 connected to the screw rod 19 is provided on the upper side of the flange 29 , and the deep groove ball bearing 31 is connected to the first telescopic tube 16 through a third bracket 32 ​​.

[0030] The bottom of the platform 4 is provided with an annular protective plate 33, which is placed on the bottom surface of the concave step 3. The inner circle of the protective plate 33 is close to the lifting mechanism 5. A support structure 34 is provided between the protective plate 33 and the platform 4. The support structure 34 can be a plurality of supporting foot pads made of rubber material. The support structure 34 is mainly used to form a moving space between the platform 4 and the protective plate 33 to prevent the anti-fall net from being crushed. The support structure 34 is located on the inner side of the anti-fall net 6. The protective plate 33 is used to prevent actors from falling into the hole 2. Anchor bolts need to be set between the bottom plate 18 and the bottom surface of the hole for fixing. In order to install it, personnel need to enter the hole and lift out the protective plate 33 during installation and reinstall it after installation.

[0031] An annular light strip is embedded on the top surface of the platform 4, and the light strip is close to the outer edge of the platform 4. The light strip emits light upward to remind the actors that the light strip is connected to the mains or battery. The light strip adopts a remote control switch, which is commercially available. When the platform 4 is raised, the light strip works.

[0032] Instructions for use: The motor 21 is connected to the mains electricity via a forward / reverse switch, which is located on the outside of the hole 2. When the forward / reverse switch is turned on, the motor 21 rotates forward, reverse, or stops. When the motor 21 rotates forward, the driving gear 22 rotates forward, driving the screw 19 to rotate via the passive gear 23. The screw 19 causes the second telescopic tube 16 to rise, increasing the overall height of the lifting mechanism 5, causing the platform 4 to rise, and placing the actor on the platform 4 in a high position. When the actor falls from the platform 4, at least one sensor 10 generates a signal, which is transmitted to the controller. The controller causes all electromagnetic telescopic rods 42 to retract, and all connecting rods 7 lose their constraints, driving the anti-fall net 6 to extend from the bottom of the platform 4 to catch the falling person. The connection method between the controller, the sensor, and the electromagnetic telescopic rod is conventional. As can be seen from the corresponding specification, the method for implementing the above-mentioned control is also conventional. Those skilled in the art can implement it based on common sense, and therefore, no further detailed description is given.

[0033] In the description of the embodiments, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation.

Claims

1. A wrap-around elevator, characterized in that: The invention comprises a hole (2) arranged on a stage surface (1), a concave step (3) being provided at the upper end of the hole (2), a platform (4) being provided at the concave step (3), a top surface of the platform (4) being flush with the stage surface (1), the platform (4) being connected to a bottom plate (18) via a lifting mechanism (5), the bottom plate (18) being fixed to the bottom surface of the hole (2), an annular anti-falling net (6) being provided at the bottom of the platform (4), a plurality of circumferentially distributed connecting rods (7) being provided on the anti-falling net (6), the connecting rods (7) being provided The outer end of the connecting rod (7) is close to the edge of the table plate (4), the inner end of the connecting rod (7) points to the central axis of the table plate (4), the connecting rod (7) is slidably connected to the table plate (4), a locking mechanism (8) is provided between the connecting rod (7) and the table plate (4), and a compression spring (9) is provided between the connecting rod (7) and the table plate (4); a plurality of sensors (10) are provided on the outer periphery of the table plate (4), a controller (11) is provided on the bottom surface of the table plate (4), and the locking mechanism (8) and the sensor (10) are both connected to the controller (11).

2. The surround-type elevator according to claim 1, characterized in that: The anti-fall net (6) includes an outer rope (12) and an inner rope (13) both of which are annular, and the outer rope (12) and the inner rope (13) are both inelastic ropes, and the outer rope (12) and the inner rope (13) are both in a relaxed state. A plurality of elastic ropes (14) both of which are annular are provided between the outer rope (12) and the inner rope (13), and the elastic ropes (14) are in a taut state. The anti-fall net (6) also includes a plurality of circumferentially distributed connecting ropes (15), and the connecting ropes (15) point to the central axis of the platform (4). The outer rope (12), the inner rope (13) and the elastic rope (14) are all fixed to the connecting ropes (15).

3. The surround-type elevator according to claim 1, characterized in that: The lifting mechanism (5) comprises N coaxially nested telescopic tubes (16), adjacent telescopic tubes (16) are slidably connected, and adjacent telescopic tubes (16) are linked and can realize axial relative movement. From the outside to the inside, the lower end of the first telescopic tube (16) is fixed to the bottom plate (18), the upper end of the Nth telescopic tube (16) is fixed to the table (4), a screw (19) is provided inside the Nth telescopic tube (16), and a driving plate (20) is provided at the lower end of the second telescopic tube (16). The lower end of the screw (19) passes through the driving plate (20) and is rotatably connected to the bottom plate (18). A motor (21) is provided on the bottom plate (18), and a driving gear (22) is provided at the output end of the motor (21). A passive gear (23) connected to the screw (19) is provided on one side of the driving gear (22).

4. The surround-type elevator according to claim 3, characterized in that: The second to N-1 telescopic tubes (16) are all provided with linkage mechanisms (17). The linkage mechanism (17) on the M-th telescopic tube (16) comprises two pulleys (24) respectively located at the upper and lower ends of the M-th telescopic tube (16). An annular driving rope (25) is provided between the upper and lower pulleys (24). The outer portion of the upper end of the driving rope (25) is connected to the M-1-th telescopic tube (16) through a first bracket (26), and the inner portion of the lower end of the driving rope (25) is connected to the M+1-th telescopic tube (16) through a second bracket (27), where M is any integer from 2 to N-1.

5. The surround-type elevator according to claim 4, characterized in that: The telescopic tubes (16) are all square tubes, and both sides of the second to N-1 telescopic tubes (16) are provided with linkage mechanisms (17).

6. The surround-type elevator according to claim 4, characterized in that: There are four telescopic tubes (16).

7. The surround-type elevator according to claim 3, characterized in that: A limiting plate (28) is provided at the upper end of the screw (19).

8. The surround-type elevator according to claim 3, characterized in that: The lower end of the screw rod (19) is provided with a flange (29), and the flange (29) is connected to the base plate (18) through a plane bearing (30). The upper side of the flange (29) is provided with a deep groove ball bearing (31) connected to the screw rod (19), and the deep groove ball bearing (31) is connected to the first telescopic tube (16) or the base plate (18) through a third bracket (32).

9. The surround-type elevator according to claim 2, characterized in that: An annular protective plate (33) is provided at the bottom of the platform (4), and the protective plate (33) is placed on the bottom surface of the concave step (3). The inner circle of the protective plate (33) is close to the lifting mechanism (5). A supporting structure (34) is provided between the protective plate (33) and the platform (4), and the supporting structure (34) is located on the inner side of the anti-fall net (6).

10. The surround-type elevator according to claim 1, characterized in that: An annular light strip is embedded on the top surface of the platform (4), and the light strip is close to the outer edge of the platform (4).

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