CN112678708B - Protection method for preventing rope belt of hoist from breaking - Google Patents
Protection method for preventing rope belt of hoist from breaking Download PDFInfo
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- CN112678708B CN112678708B CN202011642801.XA CN202011642801A CN112678708B CN 112678708 B CN112678708 B CN 112678708B CN 202011642801 A CN202011642801 A CN 202011642801A CN 112678708 B CN112678708 B CN 112678708B
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Abstract
According to the protection method for preventing the breakage of the rope belt of the elevator, the sliding assembly linked with the lifting platform is adopted, when a lifting workpiece abnormally descends, the braking block is instantly pushed to extrude to the surface of the fixed part on one side of the elevator, the self gravity of the lifting platform and the workpiece is offset by generating continuous and stable friction force, and the workpiece bearing platform is locked on the fixed part, so that the anti-falling braking effect is quickly and accurately realized, and meanwhile, the flexibility of resetting and debugging of the protection device is effectively improved. In the initial and normal operation process of the elevator, a brake platform bearing the integral protection device is connected with a hoisting support connected with a hoisting rope belt through a lever and a slide block locking pull rod, the slide block locking pull rod is inserted into the brake slide block from the bottom to limit the movement of the brake slide block, and the brake platform and the hoisting support are in a relatively balanced and static stress state.
Description
Technical Field
The invention relates to a rope belt fracture detection method applied to the lifting operation process of a stereoscopic warehouse elevator, and belongs to the technical field of logistics storage.
Background
At present, in conveying equipment in the logistics storage industry, a lifting machine is generally used for lifting or lowering a tray, a cargo carrying platform and other devices from one working height to another working height, so that the vertical warehouse is assisted to finish warehousing and ex-warehouse of materials, layer changing operation and maintenance of a trolley and the like.
In the process of high-altitude operation of equipment, a certain probability of abnormal risks of a lifting mechanism exist along with common lifting scenes of the equipment and workpieces, such as abnormal falling caused by breakage of a lifting rope. To protect the life safety of ground operators and the hung workpieces from damage, it is necessary to provide safe and reliable protection against such risks.
If the domestic patent of the applicant previously filed for application number 202010434668.2, the method for detecting the lifting operation and the belt breakage of the elevator adopts a transmission detection mode of synchronous rotation detection with a motor driving shaft so as to realize the monitoring treatment of the belt breakage and other abnormal lifting states. The lifting belt connected with the cargo carrying platform is driven by a servo motor to lift in the whole process to circularly bypass a driving module, a steering module and a direction changing module to form a closed-loop running track; the actual lifting travel distance of the cargo carrying platform is calculated and used as a basis for judging whether the lifting belt is broken or not by calculating and comparing frequency feedback signals output by the encoder and output signals of the servo motor.
According to the detection device and the detection method provided by the prior art, the actual stroke ratio between the lifting belt and the motor driving shaft is obtained through the monitoring of the steering shaft which synchronously runs with the motor driving shaft, so that the actual running speed of lifting equipment such as a cargo carrying platform is reflected, the judgment of whether the rope belt is broken completely depends on the automatic processes of detection, receiving and calculation of equipment running data, and once a relevant detection part is in a problem or is subjected to generation and calculation of accidental interference signals such as electromagnetic radiation, the accuracy and the instantaneity of a judgment result are directly caused.
Therefore, it is still necessary to adopt a mechanical trigger protection device of an immediate action type to take a protection measure in a broken state of the rope belt at the first time so as to effectively prevent the occurrence of danger.
In view of this, the present patent application is specifically proposed.
Disclosure of Invention
The invention relates to a protection method for preventing a falling rope belt of a hoist from being broken, which aims to solve the problems in the prior art and adopts a sliding component linked with a hoisting platform, when a hoisting workpiece abnormally descends, a brake block is instantly pushed to extrude to the surface of a fixed part at one side of the hoist, and a workpiece bearing platform is locked on the fixed part by generating continuous and stable friction force to counteract the self gravity of the hoisting platform and the workpiece, so that the falling prevention braking effect is quickly and accurately realized, and the flexibility of resetting and debugging of a protection device is effectively improved.
In order to achieve the design purpose, the protection method for preventing the breakage of the rope belt of the elevator, which is provided by the application, is characterized in that in the initial and normal operation processes of the elevator, a brake platform bearing an integral protection device is connected with a hoisting support connected with the hoisting rope belt through a lever and a slide block locking pull rod, the slide block locking pull rod is inserted into a brake slide block from the bottom to limit the movement of the brake platform, and the brake platform and the hoisting support are in a relatively balanced and static stress state;
when the lifting rope belt is broken abnormally, the sliding block locking pull rod is stressed to be separated from the bottom of the braking sliding block under the combined action of the gravity of the lever and the sliding block locking pull rod spring; the braking slide block moves along the braking platform under the action of the pressure of the braking spring until the braking slide block is extruded on the surface of the fixed frame body, and the friction force of the braking slide block locked on the surface of the fixed frame body counteracts the gravity of the bearing platform and the lifted goods.
Furthermore, the pressure of the slider locking pull rod spring is adjusted by the slider locking pull rod nut sleeve, and the slider locking pull rod nut sleeve provides a downward space for the slider locking pull rod, so that the slider locking pull rod can be completely separated from the bottom slotted hole of the brake slider.
Furthermore, when the brake slider moves, the inclination of the ratchet plate changes, and the energy storage of the ratchet plate pressure rod spring is released; the brake slide is prevented from backing off due to the locking action between the ratchet plate and the ratchet.
Further, in the moving process of the brake slider on the brake platform, the slider sleeve is static, and the guide and the limit of the movement of the brake slider are provided through the relative displacement between the long circular through groove and the slider sleeve.
In summary, the protection method for preventing the elevator from breaking the rope belt has the following advantages:
1. the whole structure adopts a modular design, and can be suitable for the anti-falling and rope belt fracture protection of various lifting devices;
2. the instant protection measure that the brake sliding block is released to move horizontally through the pin is adopted, the locking action response is rapid, the falling lifting equipment can be locked on the surface of the fixed part at the first time, and the protection effect is direct and accurate;
3. the slide block can be braked to rebound in a single direction by adopting a backspacing limit structure such as a ratchet plate, so that the locking effect is more reliable;
4. the elastic thrust assembly is adopted to realize locking transmission, and the locking force distributed on the surface of the fixed part is more uniform, continuous and stable.
5. When the equipment after the anti-falling locking protection is reinstalled and started, the braking sliding block can be simply and conveniently released through the reset pull rod, and the whole braking device has the characteristics of rapidness in assembling, disassembling, installing, replacing and maintaining.
Drawings
The invention will now be further described with reference to the following figures.
FIG. 1 is a schematic structural diagram of a device for protecting a hoist against breakage of a rope belt;
FIG. 2 is a side schematic view of FIG. 1;
FIG. 3 is a schematic rear view of FIG. 1;
FIG. 4 is a sectional view taken along line A-A of FIG. 2;
FIG. 5 is a sectional view taken along line B-B of FIG. 2;
FIG. 6 is a schematic view of FIG. 3 taken in the direction of C;
FIG. 7 is a cross-sectional view of the catch slide and slide bushing;
FIG. 8 is a schematic view of the initial state of the protection device;
FIG. 9 is a schematic view of the protection device in a broken state;
in the above drawings, a slider base 1, a lifting support 2, a brake slider 3, a spring sleeve 4, a return pull rod 5, a ratchet plate pressure rod 6, a ratchet plate nut sleeve 7, a brake slider pressure rod and nut 8, a return pull rod nut sleeve 9, a ratchet plate 10, a lifting end pull rod 11, a lifting end pull rod chain 12, a lever support 13, a lever 14, a lever rotating shaft 15, a slider locking pull rod 16, a slider locking pull rod nut sleeve 17, a slider sleeve 18, a ratchet 19, a brake spring 20, a slider locking pull rod spring 21, a ratchet plate pressure rod spring 22, a through groove 23, a bolt and a washer 24, a fixed frame body 100 and a brake platform 200.
Detailed Description
The protection device for preventing the breakage of the lifting rope belt comprises a braking platform 200 connected with a bearing platform (not shown in the figure) and a hoisting support 2 connected with the lifting rope belt;
two groups of fixedly installed sliding block bases 1 and movably connected braking sliding blocks 3 are arranged on the braking platform 200, a spring sleeve 4 is connected between the sliding block bases 1 and the braking sliding blocks 3, and a braking spring 20 is arranged inside the spring sleeve 4; in the initial state, the distance between the brake sliding block 3 and the fixed frame body 100 is kept between 5mm and 10 mm.
A brake slider pressing rod and a nut 8 are arranged on the outer side of the slider base 1 far away from the fixing frame body 100, and the brake slider pressing rod and the nut 8 are extruded at the end part of the brake spring 20 from outside to inside; the preset compression amount of the brake spring 20 can be adjusted by adjusting the brake slide block pressure rod and the nut 8;
the brake platform 200 is connected with the hoisting support 2 through a lever 14 and a slide block locking pull rod 16, and the slide block locking pull rod 16 is inserted into a slide block locking pull rod nut sleeve 17, the brake platform 200 and the brake slide block 3 in sequence from the bottom; a slide block locking pull rod spring 21 is sleeved between the slide block locking pull rod nut sleeve 17 and the slide block locking pull rod 16 in the braking platform 200, and the slide block locking pull rod spring 21 is extruded at the bottom of the braking slide block 3. The pressure of the slide block locking pull rod spring 21 is adjusted by the slide block locking pull rod nut sleeve 17, the slide block locking pull rod nut sleeve 17 can keep enough downward space of the slide block locking pull rod 16, and the slide block locking pull rod 16 can be completely separated from the bottom slotted hole of the braking slide block 3.
In the normal work process of hoisting the workpiece by the hoister, the brake platform 200 and the hoisting support 2 are in a relatively balanced and static stress state through the lever 14. At this time, the slider locking tie bar 16 is stably inserted into the bottom of the drag slider 3 under the elastic restriction of the slider locking tie bar nut sleeve 17 and the slider locking tie bar spring 21 to restrict the drag slider 3 from moving along the drag platform 200.
Because the brake sliding block 3 is still, the brake spring 20 inside the spring sleeve 4 between the sliding block base 1 and the brake sliding block 3 is in a compressed state, so as to store energy for driving the brake sliding block 3 to move subsequently.
When a steel wire rope, a chain, a lifting belt and the like for hanging and lifting a workpiece are broken or damaged or a bearing platform descends at an overspeed, the original force balance state of the lever 14 is broken, the slider locking pull rod 16 is stressed to be separated from the bottom of the brake slider 3 under the combined action of the self gravity of the lever 14 and the slider locking pull rod spring 21, and the brake slider 3 is only under the pressure action of the brake spring 20 in the spring sleeve 4 and moves along the brake platform 200 until being extruded on the surface of the fixed frame body 100. The friction force of the braking sliding block 3 locked on the surface of the fixed frame body 100 is used for offsetting the gravity of the bearing platform and the lifted goods, so that the reliable braking locking under the abnormal falling state is realized.
Further, in order to prevent that brake slider 3 from pressing the surface of fixing frame body 100, brake spring 20 receives the reaction force of fixing frame body 100 and leads to brake slider 3 to kick-back, the design of the anti-rollback structure of following ratchet is proposed in this application:
the brake platform 200 is provided with an inclined ratchet plate 10 and a ratchet 19 which is engaged with the saw teeth at the front end of the ratchet plate 10; a ratchet plate pressure rod 6 penetrates through the sliding block base 1 in the vertical direction, a ratchet plate nut sleeve 7 is arranged at the top end of the ratchet plate pressure rod 6, and the ratchet plate nut sleeve 7 is screwed into the sliding block base 1; a ratchet plate pressure rod spring 22 is sleeved inside the slider base 1 and between the ratchet plate pressure rod 6 and the ratchet plate nut sleeve 7; the ratchet plate pressure bar 6 presses down on the ratchet plate 10. The compression of the ratchet plate strut spring 22 can be adjusted by adjusting the screwing position of the ratchet plate nut sleeve 7, and the ratchet plate strut 6 stably applies downward pressure to the ratchet plate 10.
When the brake slider 3 moves, the inclination of the ratchet plate 10 changes, the energy storage of the ratchet plate pressure rod spring 22 is released, and the brake slider 3 is prevented from backing due to the locking action between the ratchet plate 10 and the ratchet 19, i.e. the brake slider 3 can only be continuously pressed on the surface of the fixed frame body 100, thereby further limiting the stable maintenance of the locked state of the brake slider 3.
In order to improve the accuracy of locking the brake slider 3, two sets of ratchet plates 10 and ratchets 19 may be disposed on the brake platform 200, and the teeth of the two sets of ratchet plates 10 and ratchets 19 are staggered (for example, by half tooth positions), so that the two sets of ratchets lock alternately, the stopping distance of the brake slider 3 is shorter, and the locking force of the brake slider 3 on the fixing frame 100 is improved.
Further, in order to reduce the obstruction of the brake sliding block 3 in the moving process on the brake platform 200 and improve the instant brake reaction speed under abnormal conditions, a vertically-penetrated long circular through groove 23 is arranged on the brake sliding block 3, and the sliding block sleeve 18 is inserted into the through groove 23 from top to bottom; the bottom of the slide sleeve 18 is pressed against the brake platform 200 by the bolt and washer 24 provided on the top of the slide sleeve 18; the bolt and washer 24 are vertically spaced from the catch slide 3 by a distance of about 2-5 mm.
During the movement of the brake slider 3 on the brake platform 200, the slider sleeve 18 is stationary, and the guide and limit of the movement of the brake slider 3 are provided by the relative displacement between the oblong through groove 23 and the slider sleeve 18, and the brake slider 3 can only be pushed forward under the thrust of the brake spring 20 and directly pressed on the surface of the fixed frame 100.
Further, after the abnormal situation such as rope breakage is resolved and disposed, the protection device needs to be reset to continue the lifting operation. In order to improve the rapid resetting after the braking locking and reduce the difficulty of releasing the locking state, a resetting pull rod 5 can be connected between the fixedly installed slide block base 1 and the movably connected braking slide block 3 in a penetrating way.
The outer side of the sliding block base 1 and the rod end of the reset pull rod 5 are connected with a reset pull rod nut sleeve 9, and the brake sliding block 3 is pushed out or pulled back through the reset pull rod 5 by means of the positioning acting force of the sliding block base 1 through rotating the reset pull rod nut sleeve 9, so that the brake sliding block 3 is separated from the surface of the fixed frame body 100.
Further, in order to improve the stability of maintaining the balance state between the brake platform 200 and the hoist bracket 2 by the lever 14, sufficient kinetic energy is accumulated for the subsequent slider lock draw bar 16 to be released from the brake platform 200.
The lever 14 is connected to the lever bracket 13 through a lever rotating shaft 15, one end of the lever 14 is connected with a sliding block locking pull rod 16, the other end of the lever 14 is sequentially connected with a hanging and pulling end pull rod chain 12 and a hanging and pulling end pull rod 11, and the hanging and pulling end pull rod 11 is connected with the hanging and pulling bracket 2.
The suspension-pull support 2 is connected and installed on a lifting mechanism such as a steel wire rope, upward pulling force is applied to a suspension-pull point to adjust a nut on a suspension-pull end pull rod 11, so that a suspension-pull end pull rod chain 12 keeps a tensioning state, a lever 14 rotates around a lever rotating shaft 15 fixed on a lever support 13 until a horizontal state is achieved, and at the moment, a slider locking pull rod 16 is inserted into a slotted hole at the bottom of the brake slider 3 to prevent the brake slider 3 from horizontally moving.
When the rope belt is broken, the balance state of the lever 14 is broken, the hanging end pull rod 11, the hanging end pull rod chain 12 and the lever bracket 13 simultaneously drop, and the lever 14 rotates around the lever rotating shaft 15 to drive the slide block locking pull rod 16 to move downwards and be separated from the groove hole at the bottom of the brake slide block 3.
By applying the anti-falling rope belt fracture protection device for the elevator, the anti-falling rope belt fracture protection method for the elevator is realized.
As shown in fig. 8, during the initial and normal operation of the hoist, the brake platform 200 carrying the integrated protection device is connected to the hoist bracket 2 connected to the hoisting rope belt through the lever 14 and the slider locking pull rod 16, and the slider locking pull rod 16 is inserted into the brake slider 3 from the bottom to limit the movement thereof; the brake platform 200 is in a relatively balanced and static stressed condition with the drawframe 2.
As shown in fig. 9, when the lifting rope is broken or the load-bearing platform is damaged or descends at an excessive speed, under the combined action of the self-gravity of the lever 14 and the slider locking pull rod spring 21, the slider locking pull rod 16 is forced to be disengaged from the bottom of the braking slider 3, the braking slider 3 is forced by the braking spring 20 to move along the braking platform 200 until being pressed against the surface of the fixing frame body 100, and the friction force of the braking slider 3 locked on the surface of the fixing frame body 100 counteracts the self-gravity of the load-bearing platform and the lifted goods.
Further, the pressure of the slide block locking pull rod spring 21 is adjusted by the slide block locking pull rod nut sleeve 17, and the slide block locking pull rod nut sleeve 17 provides enough downward space for the slide block locking pull rod 16, so that the slide block locking pull rod 16 can be completely released from the bottom slotted hole of the brake slide block 3.
Further, an inclined ratchet plate 10 and a ratchet 19 in saw-tooth engagement with the front end of the ratchet plate 10 are arranged on the braking platform 200; a ratchet plate pressure rod 6 penetrates through the sliding block base 1 in the vertical direction, a ratchet plate nut sleeve 7 is arranged at the top end of the ratchet plate pressure rod 6, and the ratchet plate nut sleeve 7 is screwed into the sliding block base 1; a ratchet plate pressure rod spring 22 is sleeved inside the slider base 1 and between the ratchet plate pressure rod 6 and the ratchet plate nut sleeve 7; the ratchet plate pressure bar 6 presses down on the ratchet plate 10. The compression of the ratchet plate strut spring 22 can be adjusted by adjusting the screwing position of the ratchet plate nut sleeve 7, and the ratchet plate strut 6 stably applies downward pressure to the ratchet plate 10.
When the brake slider 3 moves, the inclination of the ratchet plate 10 changes, the energy storage of the ratchet plate pressure rod spring 22 is released, and the brake slider 3 is prevented from backing based on the locking action between the ratchet plate 10 and the ratchet 19, so as to further limit the stable maintenance of the locking state of the brake slider 3.
Furthermore, a long round through groove 23 which penetrates through the brake sliding block 3 in the vertical direction is formed, and the sliding block sleeve 18 is inserted into the through groove 23 from top to bottom; the bottom of the slide sleeve 18 is pressed against the brake platform 200 by the bolt and washer 24 provided on the top of the slide sleeve 18; the bolt and washer 24 are vertically spaced from the catch slide 3 by a distance of about 2-5 mm. During the movement of the drag slider 3 on the drag platform 200, the slider sleeve 18 is stationary, and the guide and limit of the movement of the drag slider 3 are provided by the relative displacement between the oblong through groove 23 and the slider sleeve 18.
Furthermore, a reset pull rod 5 is connected through the fixedly installed slide block base 1 and the movably connected brake slide block 3; the outer side of the slide block base 1 and the rod end of the reset pull rod 5 are connected with a reset pull rod nut sleeve 9.
By rotating the reset pull rod nut sleeve 9, the brake slider 3 is pushed out or pulled back through the reset pull rod 5 by means of the positioning acting force of the slider base 1, so that the brake slider 3 is separated from the surface of the fixed frame body 100.
Further, the hanging and pulling bracket 2 is connected and installed on a lifting mechanism such as a steel wire rope, an upward pulling force is applied at a hanging and pulling point to adjust a nut on the hanging and pulling end pull rod 11, so that the hanging and pulling end pull rod chain 12 is kept in a tensioning state, the lever 14 rotates around a lever rotating shaft 15 fixed on the lever bracket 13 until reaching a horizontal state, and at the moment, the slider locking pull rod 16 is inserted into a slotted hole at the bottom of the brake slider 3 to prevent the brake slider 3 from horizontally moving.
When the rope belt is broken, the balance state of the lever 14 is broken, the hanging end pull rod 11, the hanging end pull rod chain 12 and the lever bracket 13 simultaneously drop, and the lever 14 rotates around the lever rotating shaft 15 to drive the slide block locking pull rod 16 to move downwards and be separated from the groove hole at the bottom of the brake slide block 3.
As above, the embodiments given in connection with the drawings are only preferred for achieving the objects of the present invention. Those skilled in the art can now appreciate that many other alternative constructions will be apparent which are consistent with the design of this invention. Other structural features thus obtained are also intended to fall within the scope of the solution according to the invention.
Claims (3)
1. A protection method for preventing a falling rope belt of a hoist from breaking is characterized by comprising the following steps: in the initial and normal operation process of the elevator, a brake platform bearing the integral protection device is connected with a hoisting support connected with a hoisting rope belt through a lever and a slide block locking pull rod, the slide block locking pull rod is inserted into a brake slide block from the bottom to limit the movement of the brake slide block, and the brake platform and the hoisting support are in a relatively balanced and static stress state;
when the lifting rope belt is broken abnormally, the sliding block locking pull rod is stressed to be separated from the bottom of the braking sliding block under the combined action of the gravity of the lever and the sliding block locking pull rod spring; the braking slide block moves along the braking platform under the action of the pressure of the braking spring until the braking slide block is extruded on the surface of the fixed frame, and the friction force of the braking slide block locked on the surface of the fixed frame is used for offsetting the bearing platform and the self gravity of the lifted goods;
a slide block locking pull rod spring is sleeved inside the braking platform and between the slide block locking pull rod nut sleeve and the slide block locking pull rod, and the slide block locking pull rod spring is extruded at the bottom of the braking slide block;
the pressure of the slide block locking pull rod spring is adjusted by the slide block locking pull rod nut sleeve, and the slide block locking pull rod nut sleeve provides a downward space for the slide block locking pull rod so as to realize that the slide block locking pull rod can be completely separated from a bottom slotted hole of the brake slide block.
2. The method for protecting against rope breakage of a hoist according to claim 1, characterized in that: the brake platform is provided with an inclined ratchet plate and a ratchet wheel meshed and connected with sawteeth at the front end of the ratchet plate, a ratchet plate pressure rod penetrates through the brake sliding block in the vertical direction, a ratchet plate nut sleeve is arranged at the top end of the ratchet plate pressure rod, a ratchet plate pressure rod spring is sleeved between the ratchet plate pressure rod and the ratchet plate nut sleeve, and the ratchet plate pressure rod is extruded downwards on the ratchet plate;
when the brake sliding block moves, the inclination of the ratchet plate changes, and the energy storage of a pressure rod spring of the ratchet plate is released; the brake slide is prevented from backing off due to the locking action between the ratchet plate and the ratchet.
3. The method for protecting against rope breakage of a hoist according to claim 2, characterized in that: in the moving process of the brake sliding block on the brake platform, the sliding block sleeve is static and does not move, and the moving guide and the limiting of the brake sliding block are provided through the relative displacement between the long circular through groove and the sliding block sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011642801.XA CN112678708B (en) | 2020-12-30 | 2020-12-30 | Protection method for preventing rope belt of hoist from breaking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011642801.XA CN112678708B (en) | 2020-12-30 | 2020-12-30 | Protection method for preventing rope belt of hoist from breaking |
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| CN112678708A CN112678708A (en) | 2021-04-20 |
| CN112678708B true CN112678708B (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011642801.XA Active CN112678708B (en) | 2020-12-30 | 2020-12-30 | Protection method for preventing rope belt of hoist from breaking |
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| CN (1) | CN112678708B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117627400B (en) * | 2024-01-26 | 2024-04-12 | 辽宁美耐金属建筑系统有限公司 | Anti-falling system and anti-falling method for metal roof ridge |
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| CN102092617A (en) * | 2011-01-11 | 2011-06-15 | 西安交通大学苏州研究院 | Anti-falling device of vertical elevating equipment |
| JP2012020879A (en) * | 2010-06-17 | 2012-02-02 | Mitsubishi Electric Corp | Method for repairing of elevator, and device for emergency stop in overspeed |
| CN204824059U (en) * | 2015-06-03 | 2015-12-02 | 江苏高科物流科技股份有限公司 | Rope protection device is acted on one's own judgement to stacker and stack |
| CN205274880U (en) * | 2015-11-09 | 2016-06-01 | 曹艳 | Novel disconnected rope grip is caught device |
| CN109095378A (en) * | 2018-08-25 | 2018-12-28 | 林叶青 | A kind of elevator brake shoe self-propelled detection formula band-type brake protective device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4574636B2 (en) * | 2007-03-14 | 2010-11-04 | 株式会社日立製作所 | Elevator equipment |
| JP5818930B2 (en) * | 2014-03-10 | 2015-11-18 | 東芝エレベータ株式会社 | Elevator equipment |
| CN210635166U (en) * | 2019-08-21 | 2020-05-29 | 科捷智能装备有限公司 | Cargo carrying platform with novel anti-falling mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB126207A (en) * | 1918-07-08 | 1919-05-08 | William Griffin | Improvements in Safety Devices for Mine Cages, Lifts and the like. |
| JP2012020879A (en) * | 2010-06-17 | 2012-02-02 | Mitsubishi Electric Corp | Method for repairing of elevator, and device for emergency stop in overspeed |
| CN102092617A (en) * | 2011-01-11 | 2011-06-15 | 西安交通大学苏州研究院 | Anti-falling device of vertical elevating equipment |
| CN204824059U (en) * | 2015-06-03 | 2015-12-02 | 江苏高科物流科技股份有限公司 | Rope protection device is acted on one's own judgement to stacker and stack |
| CN205274880U (en) * | 2015-11-09 | 2016-06-01 | 曹艳 | Novel disconnected rope grip is caught device |
| CN109095378A (en) * | 2018-08-25 | 2018-12-28 | 林叶青 | A kind of elevator brake shoe self-propelled detection formula band-type brake protective device |
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