CN201261670Y - Safety tong with speed limiting and anti-falling functions - Google Patents
Safety tong with speed limiting and anti-falling functions Download PDFInfo
- Publication number
- CN201261670Y CN201261670Y CNU2008201636495U CN200820163649U CN201261670Y CN 201261670 Y CN201261670 Y CN 201261670Y CN U2008201636495 U CNU2008201636495 U CN U2008201636495U CN 200820163649 U CN200820163649 U CN 200820163649U CN 201261670 Y CN201261670 Y CN 201261670Y
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- pincers
- track
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- pliers
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Abstract
The utility model discloses a pair of safe pliers which has the speed limit and fall-prevention functions and belongs to the safety device used for a lift cage. The safe pliers comprise a guide roller, a transmission wheel, a wire rope, a limit switch and a casing. A speed sensing mechanism, a triggering transmission device and an elastic locking mechanism are arranged in the casing. Through overspeed information and power obtained from the rolling contact and frictional transmission between the casing and a track, a casting block drives a centrifugation casing, the wire rope is pulled, a buckle is triggered, a compressed spring is pushed to work, and elastic gradual brake and locking is realized through pliers blocks among a transition sliding board, an inclined pliers seat and the track. The safe pliers solves the automatic safety protection problems, such as rope break of lift cage, brake failure, serious mechanism damage, traction sheave sliding, mis-operation, electric equipment out of control and the like, effectively protects the safety of equipment and personnel. The pliers are suitable for being directly installed and arranged in the positions of the lift cage and the track.
Description
Technical field
The utility model belongs to the safety device on the elevator craning cage.Specifically a kind ofly obtain the velocity information of falling from track, drive trigger mechanism work, the pincers piece is acted radially on fall body and interorbital to realize the mechanical device of locking by throwing piece by power wheel.
Background technology
The present building hoist that uses is drawn by steel rope or gear, tooth bar and to drive cage and make vertical lifting transport.The fender guard of cage fall arrest on this class elevator remains in weak point in the practice, is difficult to guarantee effectively to prevent the generation of falling accident.As
1). plant maintenance consciousness is not exerted an influence to the normal operation of equipment by force by camp site harsh environment and field staff, when causing the cage falling accident to take place, anti-fall device can not effectively be worked.
2), because of the mechanical drive fault, and under the crack conditions of steel rope end, cage produces when quickening to fall, and drives the device that eccentric wheel or skewback tooth carry out anti-fall work with the speed difference, can not reach and only stop the effect that cage falls.
3), with instantaneous and at the uniform velocity come the falling proof device of work, taking place all has bigger damage to the jacking equipment and the person after the dangerous situation.
4), under electric out of control or situation that drg is invalid, be difficult to reach anti-drop function.
5), in the operation process of installing/dismounting, in the time of as misoperation or tooth bar badly damaged, the anti-falling protection device can't be worked.
6), because of cage overload, traction sheave severe wear and steel rope is skidded produce cage when quickening to fall anti-falling safety device out of reach service conditions in race.
Above columns shows that the possibility of generation accident danger is still a lot, and its hidden danger difficulty is for the moment removed.
Summary of the invention
The purpose of this utility model provides more comprehensively fall arrest safety guard of a kind of improved safety precaution.It can make elevator craning cage the moment that hypervelocity is fallen occurring, and makes braking response automatically, prevents that falling accident from taking place, overcome preferably remain in the above-mentioned prior art defective.
The utlity model has the safety tongs of speed limit and fall arrest function, comprise guide roller, power wheel, steel rope, limit switch, casing, it is characterized in that being provided with in the casing:
A velocity pick-up mechanism, mainly stretching spring by guide roller, power wheel, concentric shafts, top forms, be mounted to one with casing: wherein guide roller is along track setting and location, power wheel is installed on the concentric shafts, two tops are stretched spring and are pushed up to track, with track rolling touch and frictional transmission towards sliding shaft base;
One is triggered driving device, mainly by centrifugal shell, throw piece, concentric shafts, steel rope, small sheave, pivoted arm, eccentric cam, support spring, pull button, clamp-buckle is formed, centrifugal shell connects with power wheel through concentric shafts, throwing piece is located in the centrifugal shell, steel rope is fixed in the outer grooving of centrifugal shell, end is to pulling interlock mutually between button, and it is corresponding with clamp-buckle to pull button, and clamp-buckle is fixed on the pincers piece that is subjected to the Control for Speed Limitation triggering;
An elastic locking mechanism, mainly form by pincers piece, top punching press spring, transiting slide plate and inclination pincers seat, wherein punching press spring in top is located at the bottom of pincers piece, the pincers piece is movably installed in dovetail furrow, with transiting slide plate is that the inclined-plane contacts, transiting slide plate is tilting on the pincers seat through regulating bolt and high pressure spring flexible fastening, and the preshoot of pincers piece locks along the dip plane jam-packed of transiting slide plate.
Described casing is provided with a manual reseting device, and the rotating shaft and the casing of its position restoring claw are fixed, and the pawl head of position restoring claw is corresponding with the tip position clamper of pincers piece.
The utlity model has the safety tongs of speed limit and fall arrest function,, got rid of the accident impact of electric factor out of control owing to adopted full mechanical anti-falling protection structure; Because do not rely on the friction of steel rope and race to realize braking, the wearing and tearing of traction sheave, the factor of skidding do not cause the influence of accident to it; Owing to, also got rid of the influence factor of this respect without gear, tooth bar; Owing to need not rely on the mechanism of fast difference band movable eccentric wheel or skewback tooth, overcome mechanically operated failure factor; Add the proofing dust and protecting measure, helped overcoming the influence of harsh environment factor; The utility model adopts high pressure spring and slide plate to realize the stepped form stop, helps the safety of equipment and personnel's person.Be provided with manual reseting device, operation is disposed very convenient.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the left-hand view of Fig. 1.
Fig. 3 is the dextrad view of Fig. 1.
Fig. 4 is a birds-eye view.
Fig. 5 is an Application Example of the present utility model.
Wherein:
1, spring is stretched on the top; 2, casing; 2
1, base; 3, centrifugal shell; 4, concentric shafts; 5, boss; 6. throwing piece; 7. sliding shaft base; 8, power wheel; 9. track; 10, guide roller; 11, steel cable; 12, pivoted arm; 13, plate button; 14, clamp-buckle; 15, eccentric projection; 16, dial axis; 17, pincers piece; 18, top punching press spring; 19, expansion bearing; 20, support stage clip; 21, small sheave; 22, cage; 23, position restoring claw; 24, dust guard; 25, gradient pincers seat; 26, transiting slide plate; 27, regulate bolt; 28, high pressure spring; 29, swirl pin; 30, grooving; 31, lateral pin; 32, limit switch; 33, weight box; 34, pulley; 35, hoist ropes; 36, towing machine; 37, base; 38, safety tongs assembly.
The specific embodiment
Be described further below in conjunction with accompanying drawing and embodiment.
Referring to accompanying drawing 1～4.
As shown, the safety tongs with speed limit and fall arrest function of the present utility model comprises guide roller 10, power wheel 8, steel rope 11, limit switch 33, casing (or claiming housing) 2, wherein is provided with in the casing:
A velocity pick-up mechanism, mainly stretch spring 1 and form by guide roller 10, power wheel 8, concentric shafts 4, top, be mounted to one through casing 1: wherein guide roller 10 is provided with and the location along track 9, power wheel 8 is installed on the concentric shafts 4, by two tops stretch spring 1 towards sliding shaft base 7 top to track 9, keep and track rolling touch and friction servo-actuated, because safety tongs and cage 22 are installed together, so follow cage along the track dipping and heaving, can in time transmit and react the variation of transmission speed;
One is triggered driving device, mainly by centrifugal shell 3, throw piece 6 (being centrifugal throwing piece), concentric shafts 4, steel rope 11, small sheave 21, pivoted arm 12, eccentric cam 15, support spring 20, pull button 13, clamp-buckle 14 is formed, centrifugal shell 6 connects with power wheel 8 through concentric shafts 4, throwing piece 6 is located in the centrifugal shell 3, locate by little spring, rotate the back under centrifugal action will outside open, combine with boss 5 during hypervelocity, drive centrifugal shell and steel rope work.Steel rope 11 is fixed in the outer grooving 30 of centrifugal shell, and an end is fixed through lateral pin 31 and centrifugal shell, and outstanding end is drawn, and forms interlock link mutually from end to pulling 13 on button.It is corresponding with clamp-buckle 14 to pull button 13, and clamp-buckle 14 is fixed on the pincers piece 17 that is subjected to the Control for Speed Limitation triggering;
An elastic locking mechanism, mainly be made up of pincers piece 17, top punching press spring 18, transiting slide plate 26 and the pincers seat 25 that tilts, wherein top punching press spring 18 is located at the bottom of pincers piece 17, and pincers piece 17 is movably installed in the dovetail furrow, be triggered and free the back upper punch slide, contact for the inclined-plane with transiting slide plate 26.Because transiting slide plate 26 is tilting to clamp on the seat 25 through regulating bolt 27 and high pressure spring 28 flexible fastenings, pincers piece 17 upper punches to raceway surface, produce powerful side direction compressing power through the inclined-plane back pressure along the dip plane jam-packed of transiting slide plate 26.Pincers piece 17 is the steel wedge of a sideband cambered surface profile of tooth, is symmetrical arranged, and damping brake is respond well.
A manual reseting device of establishing on the casing, its rotating shaft and casing of pulling arm is fixed, and the pawl head of position restoring claw 23 is corresponding with the tip position clamper of pincers piece 17.Portable barre can be depressed into original position with the pincers piece.
Among the figure, the 7th, sliding shaft base (seeing Fig. 1,3) is subjected to the top to stretch spring 1 effect, makes power wheel 8 be positioned at dynamic contact condition with track.The 16th, dial axis (seeing Fig. 1,2) connects and supporting for balance.The 19th, be expansion bearing, for assembling easy to adjust the setting.The 20th, support stage clip, for pulling the button stable operation power that provides support.The 24th, dust guard is in order to reduce the harmful effect of environment to safety tongs.The 29th, swirl pin (seeing Fig. 2,3), two parts up and down of connection casing 2 can be done adaptive swing and variation with the center of track 9.The 31st, usefulness is fixed and adjusted to lateral pin as wire rope end.The 33rd, limit switch cuts off the towing machine power supply in the safety guard-safeguard that exceeds the speed limit.
Below by further narration of figure:
Fig. 1 is the structural representation of the safety tongs of the utility model embodiment.
This device is installed on the cage face and track 9 whereabouts.As shown in Figure 1, be provided with four guide rollers 10 on the safety tongs altogether round moving with cage 22 liftings along track 9.Track roller 10 is pining down safety tongs and is deflecting and a spot of advance and retreat displacement, power wheel 8 links together by concentric shafts 4 and centrifugal shell, and sliding shaft base 5 is assemblied in the casing 2, and the rear portion is provided with the top and stretches spring 1, under its roof pressure, guarantee that power wheel 8 is along track 9 friction transmissions; Concentric shafts 4 other ends, throwing piece 6 run-in synchronisms in the centrifugal shell in the centrifugal shell 3 of its periphery, have four boss 5 on the inner diameter wall, and outer diametric plane has grooving 30, wherein is wound with steel rope 11, and the rope lower end is fixing with pivoted arm 12 by small sheave 21.Pivoted arm and dial axis 16 synchronous rotations also drive the eccentric projection 15 of its solid welding, and the moving plate button 13 of hook.Pull button 13 and adjust the location, back by expansion bearing 16.Clamp-buckle 14 and Baoding are pushed down in its support under the effect of supporting stage clip 20, will clamp piece 17 and pin.Top punching press spring 18 is arranged on the end (interior) portion of pincers piece 17.When cage 22 hypervelocity tenesmus, throwing piece 6 centrifugal in the centrifugal shell 3 produces the tangential speed that surpasses security settings, and startup work is moved through trigger mechanism, promote to have produced lateral pressure between pincers piece 17 and the track 9 by top punching press spring 18, force cage 22 to stop falling.
Fig. 2 is the left-hand view of Fig. 1.
Casing can bulk-breaking high strength be welded.Four guide rollers 10 in the place ahead surround track 9 (light dotted line is represented) in wherein, and power wheel 8 sinciputs after leaning on are to track 9.Its left side is provided with the centrifugal shell 3 of speed limit interlock usefulness and throws piece 6, is configured on the concentric shafts, picks out downwards to pivoted arm 12 with steel rope 11, transfers control through dial axis 16 and pulls button 13.
What the bottom right was set is lockout mechanism, the pivoted arm 12 in the inner chamber on the dial axis 16 of pincers piece 17 back, and plate button 13 and swirl pin 29 all reaches back by the hole of being opened on the casing and miscellaneous part connects each other.Be provided with top punching press spring 18 in pincers piece 17, the side is to make bearing fit by dovetail furrow form and transiting slide plate 26.Set adjusting bolt 27 and unidirectional two high pressure springs 28 are positioned on the gradient pincers seat 25,25 of transiting slide plate 26 and gradient pincers seats should keep certain space after regulating, elastic reaction because of its spring, make it when cage generation falling accident, this structure can play the effect that prevents to fall of progressive buffer-type, has avoided the major injury of the person and device structure.24 dust guards for dustproof usefulness.
Fig. 3 is the dextrad view of Fig. 1.
Among this figure, track 9 (light dotted line is represented) has forwarded the rear to.As shown, can make the work of pincers block reset with the portable barre that resets of position restoring claw 23 that draws, its fulcrum is positioned at the inferior horn of a top board of casing 2.Swirl pin 29 passes the movable cooperation of casing, guarantees casing 2 and bottom base 2
1Flexible connection (following connection cage).The head of position restoring claw 23 then extends through the position, hole, floats to be shelved on above the pincers pieces 17 (Fig. 1).The fixed end that is centered around steel rope 11 in the grooving 30 of centrifugal shell 3 is by lateral pin 31 location, and its elasticity of scalable.At the top of safety pincers, the top end face of centrifugal shell 3 and casing is provided with dustproof cover plate 24, to prevent the erosion of dust and rainwater etc.
Fig. 4 is a birds-eye view.
Fig. 5 is an Application Example of the present utility model.
Below in conjunction with Fig. 5 its working process is described:
1), safety tongs assembly 38 device that the utlity model has speed limit and fall arrest function is in cage 22 angle positions, normally in service, towing machine 36 is through hauling rope 35 and pulley 34 and train bird cage 22, weight box 33 correspondences lifting; The guide roller 10 of safety tongs is contacted with track by power wheel along track 9 liftings, transmits normal speed, steadily operation.
2), skid when disconnected rope, brake failure, mechanical major injury, traction sheave take place for cage 22, during situation such as electric out of control or misoperation, cage 22 hypervelocity (acceleration) tenesmus, the moment of power wheel opens rotating speed increase throwing piece and drives centrifugal shell action by the work of steel rope initiation trigger mechanism, make cage 22 produce gradual stop, the pincers piece of safety tongs is embedded between track 9 surfaces and the gradient pincers seat, clamps down on and stops.Thereby reliably prevent the person and equipment grave accident.
3), behind the trouble removal, reset.Can directly make the pawl head of position restoring claw will clamp the piece back pressure after discharging the compressing power that clamps piece, realize resetting to pulling padlock calmly with having pulled the barre that resets.Restart protection work then.
According to the track 9 used section bar differences of towing machine 36, the jaw of pincers piece 17 can guarantee that after respective change the contact surface shape adapts to it, and what make cage 22 prevents that the safety guard-safeguard that falls is perfectly safe.37 is the base of towing machine among the figure.
This apparatus structure compactness, member is simple, and frictional transmission is normal, after Installation and Debugging, can reach the generation that reliably prevents the elevator craning cage falling accident.
Claims (2)
1, a kind of safety tongs with speed limit and fall arrest function comprises guide roller (10), power wheel (8), steel rope (11), limit switch (32), casing (2), it is characterized in that being provided with in the casing:
A velocity pick-up mechanism, mainly stretch spring (1) and form by guide roller (10), power wheel (8), concentric shafts (4), top, be mounted to one with casing (2): wherein guide roller (10) is provided with and the location along track (9), power wheel (8) is installed on the concentric shafts (4), two tops stretch spring (1) towards sliding shaft base (7) top to track (9), with track (9) rolling touch and friction servo-actuated;
One is triggered driving device, mainly by centrifugal shell (3), throw piece (6), concentric shafts (4), steel rope (11), small sheave (21), pivoted arm (12), eccentric cam (15), support spring (20), pull button (13), clamp-buckle (14) is formed, centrifugal shell (3) connects with power wheel (8) through concentric shafts (4), throwing piece (6) is located in the centrifugal shell (3), steel rope (11) is fixed in the outer grooving (30) of centrifugal shell, end is to pulling interlock mutually between button, it is corresponding with clamp-buckle (14) to pull button (13), and clamp-buckle (14) is fixed on the pincers piece (17) that is subjected to the Control for Speed Limitation triggering;
An elastic locking mechanism, mainly form by pincers piece (17), top punching press spring (18), transiting slide plate (26) and the pincers seats (25) that tilt, wherein top punching press spring (18) is located at the bottom of pincers pieces (17), pincers pieces (17) are movably installed in dovetail furrow, contact for the inclined-plane with transiting slide plate (25), transiting slide plate (25) is tilting on the pincers seats (25) through regulating bolt (27) and high pressure spring (28) flexible fastening, clamps piece (17) preshoot and locks along the dip plane jam-packed of transiting slide plate (26).
2, the safety tongs with speed limit and fall arrest function as claimed in claim 1, it is characterized in that casing is provided with a manual reseting device, rotating shaft of its position restoring claw (23) and casing (2) are fixing, and the pawl head of position restoring claw is corresponding with the tip position clamper of pincers pieces (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201636495U CN201261670Y (en) | 2008-09-02 | 2008-09-02 | Safety tong with speed limiting and anti-falling functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201636495U CN201261670Y (en) | 2008-09-02 | 2008-09-02 | Safety tong with speed limiting and anti-falling functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201261670Y true CN201261670Y (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201636495U Expired - Fee Related CN201261670Y (en) | 2008-09-02 | 2008-09-02 | Safety tong with speed limiting and anti-falling functions |
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| CN (1) | CN201261670Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804934A (en) * | 2010-03-30 | 2010-08-18 | 苏州东南电梯（集团）有限公司 | Safety gear |
| CN101781968B (en) * | 2010-01-27 | 2012-04-18 | 广东轻工职业技术学院 | Safe brake for rolling door |
| CN102623238A (en) * | 2012-03-24 | 2012-08-01 | 无锡久一重工机械有限公司 | Centrifugal power-off protection device for safety lock |
| CN103818797B (en) * | 2014-03-24 | 2016-01-20 | 袁昭成 | Based on velocity limiter and the safety tongs linked system of elevator |
| CN105905739A (en) * | 2016-06-08 | 2016-08-31 | 中国船舶重工集团公司第七�三研究所 | Dual-purpose bidirectional safety tongs preventing accidental movement and overspeed |
| CN106586749A (en) * | 2016-12-27 | 2017-04-26 | 南通理工学院 | Intelligent monitoring system applied to elevator |
| CN106744414A (en) * | 2017-01-06 | 2017-05-31 | 浙江理工大学 | Flybar hoist engine with mechanical type anti-fall function |
| CN107298358A (en) * | 2017-08-11 | 2017-10-27 | 河北东方富达机械有限公司 | anti-falling safety device |
| CN107458969A (en) * | 2017-10-11 | 2017-12-12 | 长治市潞安合力机械有限责任公司 | A kind of monorail crane centrifuges speed limited wheel |
| CN111717751A (en) * | 2020-06-16 | 2020-09-29 | 浙江智菱科技有限公司 | Safety protection type elevator |
| CN112723189A (en) * | 2021-02-26 | 2021-04-30 | 深圳市瑾能顺建材有限公司 | Following formula tower crane cat ladder anti-falling device |
| CN117799789A (en) * | 2024-01-03 | 2024-04-02 | 连云港港口集团有限公司 | Rescue tug traction device with protective structure |
-
2008
- 2008-09-02 CN CNU2008201636495U patent/CN201261670Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781968B (en) * | 2010-01-27 | 2012-04-18 | 广东轻工职业技术学院 | Safe brake for rolling door |
| CN101804934A (en) * | 2010-03-30 | 2010-08-18 | 苏州东南电梯（集团）有限公司 | Safety gear |
| CN102623238A (en) * | 2012-03-24 | 2012-08-01 | 无锡久一重工机械有限公司 | Centrifugal power-off protection device for safety lock |
| CN102623238B (en) * | 2012-03-24 | 2014-07-30 | 无锡久一重工机械有限公司 | Centrifugal power-off protection device for safety lock |
| CN103818797B (en) * | 2014-03-24 | 2016-01-20 | 袁昭成 | Based on velocity limiter and the safety tongs linked system of elevator |
| CN105905739A (en) * | 2016-06-08 | 2016-08-31 | 中国船舶重工集团公司第七�三研究所 | Dual-purpose bidirectional safety tongs preventing accidental movement and overspeed |
| CN106586749A (en) * | 2016-12-27 | 2017-04-26 | 南通理工学院 | Intelligent monitoring system applied to elevator |
| CN106744414B (en) * | 2017-01-06 | 2023-02-17 | 浙江理工大学 | Stage suspender winch with mechanical anti-falling function |
| CN106744414A (en) * | 2017-01-06 | 2017-05-31 | 浙江理工大学 | Flybar hoist engine with mechanical type anti-fall function |
| CN107298358A (en) * | 2017-08-11 | 2017-10-27 | 河北东方富达机械有限公司 | anti-falling safety device |
| CN107298358B (en) * | 2017-08-11 | 2024-06-11 | 河北东方富达机械有限公司 | Anti-falling safety device |
| CN107458969A (en) * | 2017-10-11 | 2017-12-12 | 长治市潞安合力机械有限责任公司 | A kind of monorail crane centrifuges speed limited wheel |
| CN111717751A (en) * | 2020-06-16 | 2020-09-29 | 浙江智菱科技有限公司 | Safety protection type elevator |
| CN112723189A (en) * | 2021-02-26 | 2021-04-30 | 深圳市瑾能顺建材有限公司 | Following formula tower crane cat ladder anti-falling device |
| CN112723189B (en) * | 2021-02-26 | 2023-11-14 | 深圳市瑾能顺建材有限公司 | Follow-up type tower crane cat ladder anti-falling device |
| CN117799789A (en) * | 2024-01-03 | 2024-04-02 | 连云港港口集团有限公司 | Rescue tug traction device with protective structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20120902 |