Anti-falling secondary protection device for elevator

Abstract

The utility model relates to an elevator anti-falling secondary protection device which comprises a fixing frame, the fixing frame comprises two bearing vertical plates and an upper bearing plate connected with the two bearing vertical plates, and the two sides of the upper bearing plate are fixedly connected with the two bearing vertical plates respectively. The two bearing vertical plates are fixedly arranged on the front side and the rear side of the car frame cross beam or the counterweight frame cross beam respectively, the upper bearing plate is located above the diversion sheave, and the traction ropes are located on the left side and the right side of the upper bearing plate. According to the anti-falling secondary protection device for the elevator, the strength of the lift car frame or the counter-weight frame can be enhanced so that the situation that the diversion sheave falls off due to deformation of the lift car frame or the counter-weight frame can be avoided, and meanwhile the secondary anti-falling function can be achieved after the diversion sheave falls off.

Description

Technical Field

[0001] The utility model relates to an anti - falling device for a lift elevator, in particular to a secondary anti - falling protection device for an elevator. Background Art

[0002] The deflector sheave is a movable pulley provided on the upper parts of the car frame and the counterweight frame. The traction ropes of the lift elevator can bypass the deflector sheave to form different traction ratios.

[0003] Generally, the deflector sheave is fixedly connected to the upper cross - beam of the car frame or the counterweight frame through a fixed clamping plate. After the elevator has been running for a long time, due to long - term wear and the action of gravity, the upper cross - beam is prone to bow - shaped deformation. In severe cases, the fixed clamping plate of the deflector sheave shaft will be damaged, causing the deflector sheave to break away from its fixing device, and then resulting in the separation of the traction rope from the car or the counterweight, leading to the fall of the car. In a certain elevator accident that occurred in Mile, Yunnan, it was caused by the damage of the deflector sheave device. Therefore, it is urgent to carry out secondary protection on the deflector sheave device to avoid the detachment of the deflector sheave and the occurrence of elevator accidents. Summary of the Invention

[0004] To solve the above - mentioned technical problems, the utility model provides a secondary anti - falling protection device for an elevator, which can strengthen the strength of the car frame or the counterweight frame to avoid deformation and cause the deflector sheave to fall off, and at the same time can realize the secondary anti - falling function after the deflector sheave falls off.

[0005] The secondary anti - falling protection device for an elevator of the utility model includes a fixed frame. The fixed frame includes two load - bearing vertical plates and an upper load - bearing plate connecting the two load - bearing vertical plates. The two sides of the upper load - bearing plate are respectively fixedly connected to the two load - bearing vertical plates. During installation, the two load - bearing vertical plates are respectively fixedly arranged on the front and back sides of the cross - beam of the car frame or the counterweight frame, the upper load - bearing plate is located above the deflector sheave, and the traction ropes are located on the left and right sides of the upper load - bearing plate.

[0006] The advantages of this secondary anti - falling protection device for an elevator are that its structure is simple, convenient for installation and disassembly, thus facilitating the replacement and maintenance of the deflector sheave or the steel wire rope.

[0007] At the same time, since the two load - bearing vertical plates are connected by the upper load - bearing plate, and the load - bearing vertical plates are fixedly arranged on the front and back sides of the cross - beam, the strength of the upper cross - beam is strengthened. After long - term use, the plates on both sides of the upper cross - beam are not prone to outward bow - shaped deformation, thus effectively preventing the damage of the fixed clamping plate of the deflector sheave shaft and preventing the deflector sheave from falling off the upper cross - beam and causing elevator accidents.

[0008] Even if the deflecting sheave falls off the upper crossbeam, since the deflecting sheave is located below the upper bearing plate and the hoisting ropes wound around the deflecting sheave are located on the left and right sides of the upper bearing plate, in this way, after the deflecting sheave falls off, the hoisting ropes can still be connected to the car frame or counterweight frame through the upper bearing plate and the bearing vertical plate, thereby preventing accidents caused by the separation between the car or counterweight and the hoisting ropes.

[0009] Furthermore, for the elevator anti-falling secondary protection device of the present utility model, the bearing vertical plate is fixedly connected to the crossbeam by bolts.

[0010] The bearing vertical plate connected by bolts facilitates the operator to disassemble the fixing frame, thereby facilitating the replacement of suspension devices such as the deflecting sheave and wire ropes.

[0011] Furthermore, for the elevator anti-falling secondary protection device of the present utility model, the fixing frame is integrally formed by a steel plate.

[0012] The fixing frame integrally formed by a steel plate can greatly improve the strength of the fixing frame itself, thereby realizing the protection of the car frame or counterweight frame.

[0013] Furthermore, for the elevator anti-falling secondary protection device of the present utility model, a micro switch is provided on the upper bearing plate, and the micro switch is located above the deflecting sheave.

[0014] The setting of the micro switch enables the deflecting sheave to touch the micro switch and open it when the deflecting sheave falls off, thereby opening the electrical safety device connected to the micro switch to cut off the power supply in time, or opening the alarm device connected to the micro switch to notify relevant personnel to repair the elevator in time.

[0015] Furthermore, for the elevator anti-falling secondary protection device of the present utility model, an installation hole is provided in the middle of the upper bearing plate, an installation seat connected to the upper bearing plate is provided at the installation hole, and the micro switch is arranged on the installation seat.

[0016] The setting of the installation seat facilitates the operator to install the micro switch on the upper bearing plate.

[0017] Furthermore, for the elevator anti-falling secondary protection device of the present utility model, connecting rods are respectively arranged on the left and right sides of the micro switch, the top ends of the connecting rods are fixedly connected to the installation seat, a switch plate is arranged below the micro switch, a spring is arranged between the switch plate and the installation seat, the spring is sleeved outside the connecting rod, one end of the spring is fixed to the installation seat or the connecting rod, and the other end is connected to the switch plate.

[0018] Since the deflecting sheave is circular, when the deflecting sheave falls off, it is easy to generate a deviation between the circular deflecting sheave and the micro switch, resulting in the micro switch not being able to be opened in time. The switch plate with a flat surface can accurately act on the micro switch under the action of the deflecting sheave, thereby opening the electrical safety switch or alarm device.

[0019] Furthermore, for the secondary anti - falling protection device of the elevator of the present utility model, a connection hole is provided in the middle of the bearing vertical plate. During installation, the axle of the deflector sheave passes through the connection hole.

[0020] The setting of the connection hole realizes the positioning of the deflector sheave and also strengthens the connection strength between the deflector sheave and the cross beam.

[0021] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and implement it specifically according to the content of the description, the following uses the embodiments of the present utility model to describe it in detail. Description of the Drawings

[0022] Figure 1 is a three - dimensional view of the secondary anti - falling protection device of the elevator on the counterweight frame.

[0023] Figure 2 is Figure 1 a partial enlarged view of part A in

[0024] Figure 3 is a schematic diagram of the cooperation of components such as the micro - switch, mounting seat and switch board.

[0025] In the figure, bearing vertical plate 1, upper bearing plate 2, counterweight frame 3, cross beam 4, deflector sheave 5, hoisting rope 6, vertical beam 7, bottom beam 8, bolt 9, mounting seat 10, connecting rod 11, switch board 12, spring 13, connection hole 14, axle 15, micro - switch 16. Detailed Embodiment

[0026] The following combines the drawings and embodiments to further describe the detailed implementation of the present utility model in detail. The following embodiments are used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0027] Embodiment 1: Refer to Figures 1 to 3 , the secondary anti - falling protection device of the elevator in this embodiment includes a fixing frame. The fixing frame includes two bearing vertical plates 1 and an upper bearing plate 2 connecting the two bearing vertical plates. The two sides of the upper bearing plate are respectively fixedly connected to the two bearing vertical plates. During installation, the two bearing vertical plates are respectively fixedly arranged on the front and rear sides of the cross beam 4 of the car frame or the counterweight frame 3. The upper bearing plate is located above the deflector sheave 5, and the hoisting ropes 6 are located on the left and right sides of the upper bearing plate.

[0028] The advantages of this secondary anti - falling protection device of the elevator are that its structure is simple, convenient for installation and disassembly, thus facilitating the replacement and maintenance of the deflector sheave or the steel wire rope.

[0029] Meanwhile, since the two load-bearing vertical plates are connected by the upper load-bearing plate, and the load-bearing vertical plates are fixedly arranged on the front and rear sides of the crossbeam, the strength of the upper crossbeam is enhanced. After long-term use, the plates on both sides of the upper crossbeam are not prone to outward bowing deformation, thereby effectively preventing damage to the fixing clamp of the anti-tension pulley shaft and preventing the anti-tension pulley from falling off the upper crossbeam and causing an elevator accident.

[0030] Even if the anti-tension pulley falls off the upper crossbeam, since the anti-tension pulley is located below the upper load-bearing plate and the traction ropes wound around the anti-tension pulley are located on the left and right sides of the upper load-bearing plate, in this way, after the anti-tension pulley falls off, the traction ropes can also be connected to the car frame or the counterweight frame through the upper load-bearing plate and the load-bearing vertical plates, thereby avoiding accidents caused by the separation between the car or the counterweight and the traction ropes.

[0031] Among them, the car frame and the counterweight frame are respectively used to install the car and the counterweight of the elevator. Here, the specific structure of the counterweight frame is described as an example, and the car frame is similar to it and will not be elaborated. Specifically, the counterweight frame is a rectangular frame structure, which includes a crossbeam, a vertical beam 7 and a bottom beam 8 connected end to end. The crossbeam, the vertical beam and the bottom beam are fixedly connected by two layers of plates. The above-mentioned fixing frame is arranged in the middle of the crossbeam, and its overall structure is an inverted concave shape. During installation, the anti-tension pulley is installed between the two plates of the crossbeam, and its wheel shaft is arranged on the front and rear side plates of the crossbeam. The upper load-bearing plate is located directly above the anti-tension pulley. The traction rope passes through the anti-tension pulley from one end of the upper load-bearing plate and extends from the other end of the upper load-bearing plate. The two load-bearing vertical plates are respectively fixed to the front side and the rear side of the crossbeam by bolts, thereby realizing the fixation of the fixing frame and the crossbeam.

[0032] Under normal circumstances, the anti-tension pulley is separated from the upper load-bearing plate. When the anti-tension pulley falls off the crossbeam due to a fault, the traction rope can hold the counterweight frame through the upper load-bearing plate above the anti-tension pulley, thereby realizing the secondary anti-falling of the car or the counterweight.

[0033] Preferably, the load-bearing vertical plate is fixedly connected to the crossbeam by a bolt 9.

[0034] The load-bearing vertical plate connected by bolts facilitates the operator to disassemble the fixing frame, thereby facilitating the replacement of suspension devices such as the anti-tension pulley and the steel wire rope.

[0035] Among them, the bolt can be a strengthened bolt to improve the connection strength between it and the crossbeam.

[0036] Preferably, the fixing frame is integrally formed by a steel plate.

[0037] The fixing frame integrally formed by a steel plate can greatly improve the strength of the fixing frame itself, thereby realizing the protection of the car frame or the counterweight frame.

[0038] Wherein, both ends of the upper bearing plate can be subjected to deburring or other smooth or arc treatments to prevent the two ends of the upper bearing plate from damaging or even cutting the traction ropes when the car or counterweight falls.

[0039] Furthermore, reinforcing blocks can be fixedly arranged below the upper bearing plate, and the two ends of the bottom surface of the reinforcing blocks are chamfered into arcs, which can improve the strength of the upper bearing plate and reduce its damage to the traction ropes.

[0040] Preferably, a microswitch 16 is provided on the upper bearing plate, and the microswitch is located above the idler pulley.

[0041] The setting of the microswitch enables the idler pulley to touch the microswitch and open it when the idler pulley falls off, thereby opening the electrical safety device connected to the microswitch to cut off the power supply in time, or opening the alarm device connected to the microswitch to notify relevant personnel to repair the elevator in time.

[0042] Preferably, a mounting hole is provided in the middle of the upper bearing plate, and a mounting seat 10 connected to the upper bearing plate is provided at the mounting hole, and the microswitch is arranged on the mounting seat.

[0043] The setting of the mounting seat facilitates the operator to install the microswitch on the upper bearing plate.

[0044] Specifically, the mounting seat can be fixedly arranged at the mounting hole of the upper bearing plate by welding, and the bottom surface of the mounting seat has a mounting groove adapted to the microswitch, and the operator can fix the microswitch in the mounting groove by means of screws or the like.

[0045] Under normal circumstances, there is a certain gap between the idler pulley, the upper bearing plate and the microswitch. When the idler pulley falls off the crossbeam, the crossbeam together with the fixing frame, the car or the counterweight will fall rapidly until the idler pulley contacts the microswitch on the bottom surface of the upper bearing plate, thereby opening the corresponding electrical safety switch or alarm device. At the same time, the idler pulley can hold the car or the counterweight through the fixing frame to achieve the secondary anti-falling function.

[0046] Preferably, connecting rods 11 are respectively arranged on the left and right sides of the microswitch, the top ends of the connecting rods are fixedly connected to the mounting seat, a switch plate 12 is arranged below the microswitch, a spring 13 is arranged between the switch plate and the mounting seat, the spring is sleeved outside the connecting rod, and one end of the spring is fixed to the mounting seat or the connecting rod, and the other end is connected to the switch plate.

[0047] Since the idler pulley is circular, when the idler pulley falls off, it is easy to generate a deviation between the circular idler pulley and the microswitch, resulting in the microswitch not being able to be opened in time. And the switch plate with a flat surface can accurately act on the microswitch under the action of the idler pulley, thereby opening the electrical safety switch or alarm device.

[0048] Specifically, in the normal state, there is a certain distance between the switch board and the deflector sheave. When the deflector sheave falls off, the switch board descends under the drive of the fixing bracket until it contacts the deflector sheave. Thereafter, under the action of the deflector sheave, the switch board overcomes the elastic force of the spring and rises along the connecting rod relative to the upper bearing plate until it contacts the micro switch, thereby turning on the micro switch and realizing the corresponding function.

[0049] In order to achieve precise positioning of the switch board, positioning holes can be provided at both ends of the switch board, and the bottom end of the support rod passes through the positioning holes, thereby realizing the positioning and guiding of the switch board.

[0050] Preferably, a connecting hole 14 is provided in the middle of the bearing vertical plate. During installation, the axle 15 of the deflector sheave passes through the connecting hole.

[0051] The setting of the connecting hole realizes the positioning of the deflector sheave and also strengthens the connection strength between the deflector sheave and the cross beam.

[0052] During specific implementation, the above-mentioned fixing bracket needs to have a certain bearing capacity. If it is used for the deflector sheave device on the counterweight side, it must be able to bear the weight of the counterweight plus a certain additional safety factor. If it is used for the deflector sheave device on the top of the car, it must be able to bear the sum of 1.1 times the rated load plus the weight of the car itself and have a certain additional safety factor.

[0053] The above are only the preferred embodiments of the present invention, which are used to assist those skilled in the art to implement the corresponding technical solutions, and do not limit the protection scope of the present invention. The protection scope of the present invention is defined by the appended claims. It should be noted that for those of ordinary skill in the art, based on the technical solutions of the present invention, several equivalent improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. At the same time, it should be understood that although this specification is described according to the above embodiments, not every embodiment only contains an independent technical solution. The narrative way of this specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions of each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An elevator anti-falling secondary protection device, characterized in that: It includes a fixing frame which consists of two bearing vertical plates (1) and an upper bearing plate (2) connecting the two bearing vertical plates. The two sides of the upper bearing plate are fixedly connected to the two bearing vertical plates respectively. During installation, the two bearing vertical plates are fixedly arranged on the front and rear sides of the cross beam of the car frame or the counterweight frame (3) cross beam (4). The upper bearing plate is located above the deflector sheave (5), and the hoisting ropes (6) are located on the left and right sides of the upper bearing plate.

2. The elevator anti-falling secondary protection device according to claim 1, characterized in that: The bearing vertical plate is fixedly connected to the cross beam by bolts (9).

3. The elevator anti-falling secondary protection device according to claim 1, characterized in that: The fixing frame is integrally formed by a steel plate.

4. The elevator anti-falling secondary protection device according to claim 1, characterized in that: A microswitch (16) is provided on the upper bearing plate, and the microswitch is located above the deflector sheave.

5. The elevator anti-falling secondary protection device according to claim 4, characterized in that: An installation hole is provided in the middle of the upper bearing plate. An installation seat (10) connected to the upper bearing plate is provided at the installation hole, and the microswitch is arranged on the installation seat.

6. The elevator anti-falling secondary protection device according to claim 5, characterized in that: Connecting rods (11) are respectively arranged on the left and right sides of the microswitch. The top ends of the connecting rods are fixedly connected to the installation seat. A switch plate (12) is provided below the microswitch. A spring (13) is arranged between the switch plate and the installation seat. The spring is sleeved outside the connecting rod. One end of the spring is fixed to the installation seat or the connecting rod, and the other end is connected to the switch plate.

7. The elevator anti-falling secondary protection device according to claim 1, characterized in that: A connection hole (14) is provided in the middle of the bearing vertical plate. During installation, the axle (15) of the deflector sheave passes through the connection hole.

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