CN102874669B - Emergency braking device of elevator - Google Patents
Emergency braking device of elevator Download PDFInfo
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- CN102874669B CN102874669B CN201210238558.4A CN201210238558A CN102874669B CN 102874669 B CN102874669 B CN 102874669B CN 201210238558 A CN201210238558 A CN 201210238558A CN 102874669 B CN102874669 B CN 102874669B
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- braking element
- braking
- guide rail
- elevator
- emergency braking
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Abstract
The invention provides an emergency braking device of an elevator. When the elevator emergency state occurs during a running period, the elevator generates a braking force within a time as short as possible, and enables actuator not to release the braking to the elevator car at a large capacity. When a first braking component and a second braking component carry out a compression clamping emergency braking on a guide rail to release the emergency braking, the second cam-shaped braking component is in leakage with the rising movement of the operated elevator car, so that the second braking component is abutted against the guide rail and rotates simultaneously, and accordingly, the interval between an electromagnetic winding of the actuator arranged at the other end side of an arm part and a column plug is shortened; when the emergency is released, the electrified actuator acts during the stage after the interval is shortened, so that the cam-shaped second braking component is separated from the guide rail; namely, when the braking is released, a cam is rotated by utilizing the energy of lifting the elevator car, and the actuator can return to the position close to the normal state, so that the capacity for recovering the needed actuator can be shortened.
Description
Technical field
The present invention relates to a kind of emergency braking apparatus of elevator, especially relate to a kind of can to the technology for emergency braking apparatus to be carried out low capacity from the actuator that emergency braking condition returns to normal state.
Background technology
As patent documentation 1 and patent documentation 2 as disclosed, proposed when the descending speed of lift car has exceeded specified value with the emergency braking apparatus of electronic mode work.
Disclosed in patent documentation 1, emergency braking apparatus is made up of Braking-force generator and actuating mechanism device, this Braking-force generator carries out pressurization clamping by braking element to guide rail, stop making lift car declining, this actuating mechanism device makes the braking element action of Braking-force generator when the descending speed of lift car has exceeded specified value.
When emergency braking apparatus disclosed in patent documentation 2 is formed at and carries out emergency braking to lift car, remove electromagnet, and utilize the application force of the first spring by the fixed part that is made up of the braking element of cleat shape and the guiding device with lozenges that are arranged on rail-sides by being pressed on guide rail, produce the friction force of towing braking element on the moving direction of lift car thus relative to guide rail, by this friction force, braking element is inserted between guide rail and guiding device.
In addition, in patent documentation 2, braking element moves along lozenges, makes it possible to overcome the application force of the first spring and the gap expanded between guiding device and guide rail.Behind position before this guiding device moves to electromagnet releasing, electromagnet also returns to the state before releasing.Thus, the first spring cannot compress further.Further, when braking element moves along lozenges, the second spring be arranged between electromagnet and guiding device is compressed, and makes between guide rail and braking element, produce large friction force and brake lift car.In addition, when carrying out common operation, owing to must compress making the spring of connecting element action, so employ the actuator of electromagnet etc.
At first technical literature
Patent documentation
Patent documentation 1: Japan's patent No. 4478704 publication
Patent documentation 2: Japanese Patent Laid-Open 2008-143706 publication
In the emergency braking apparatus disclosed in patent documentation 1, when making actuating mechanism device return to usual state, need the attractive force that can overcome spring force braking element being carried out to pressurization clamping that interim generation is very large.Because the capacity of actuator is decided by this attractive force, so actuator high capacity can be caused.
In the emergency braking apparatus disclosed in patent documentation 2, the actuator that the mode of the above-mentioned patent documentation of volume ratio 1 is little can be used, but owing to needing to produce large friction force after actuator is returned to usual state, so must carry out according to the step recorded in above-mentioned background technology, the time produced needed for braking force is made to be greater than the mode of above-mentioned patent documentation 1.
Summary of the invention
The object of the present invention is to provide a kind of lift facility, when having there is emergency situation in elevator run duration, the emergency braking apparatus that this lift facility has can produce braking force within the time short as far as possible, and can remove braking to lift car can not make the mode of actuator high capacity.
Solution
In order to solve above-mentioned problem, the present invention mainly have employed following structure.
Elevator of the present invention has: lift car, and described lift car is elevated under the guiding being erected to the guide rail be arranged in hoist trunk; Counterbalanced weight, described counterbalanced weight is connected with described lift car by main hoist cable; Drive the winch of described main hoist cable; And emergency braking apparatus, described emergency braking apparatus is arranged on described lift car, for applying braking force to described lift car,
Described emergency braking apparatus has the first base portion and the second base portion, and described first base portion is fixed on described lift car, and described second base portion can relative to the longitudinal axis displacement be in the vertical direction supported in described first base portion,
Be provided with in described second base portion: the first braking element of cleat shape, described first braking element carries out pressurization clamping to described guide rail; A pair arm, described arm is supported for can with the described longitudinal axis for fulcrum; Second braking element of cam face, described second braking element is positioned at the end side of described a pair arm, for carrying out pressurization clamping to described guide rail; And actuator, described actuator is arranged on another side of described a pair arm, for making described second braking element leave described guide rail,
Emergency braking is carried out when removing the state of the emergency braking of clamping of carrying out from described first braking element and described second braking element described guide rail pressurizeing, second braking element of described cam face moves interlock with the rising of the described lift car undertaken by operating, thus while abut with described guide rail while rotate, interval between the electromagnetism winding of the described actuator of another side being arranged on described arm and plunger is reduced, the stage of described actuator after described interval reduces starting when described emergency braking is removed to be energized carries out action, second braking element of described cam face is separated with described guide rail,
According to said structure, when brake off, utilize the energy of mentioning lift car that cam is rotated, actuator can be made thus to turn back to position close to peacetime state, consequently, the capacity of the actuator for brake off can be reduced.
Invention effect
According to the present invention, braking force can be produced rapidly when emergency situation has appearred in elevator run duration, and only just need can return to common state by the action of the actuator of low capacity when brake off.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the machine room-less elevator brief configuration of the emergency braking apparatus representing the elevator had involved by embodiments of the present invention.
Fig. 2 is the overall perspective view of the emergency braking apparatus involved by present embodiment.
Fig. 3 is the overall perspective view of the actuating mechanism device of the emergency braking apparatus shown in Fig. 2.
Fig. 4 is the front view of the emergency braking apparatus shown in Fig. 2, represents the various different operating state of emergency braking apparatus.
Fig. 5 is the birds-eye view of the different operating state representing arm in the emergency braking apparatus shown in Fig. 2 and actuator.
Fig. 6 is the front view of other structure example of the emergency braking apparatus represented involved by present embodiment.
Nomenclature
1 hoist trunk
2A, 2B guide rail
3 lift cars
4 counterbalanceds weight
5 winchs
6 drgs
7 main hoist cables
8A, 8B emergency braking apparatus
9 control panels
10 coders
11 first base portions
12 first elastic components
13A, 13B stop-motion body directing pin
16A, 16B, 16C, 16D anchor shaft
17A, 17B wedge shape part
18,19 wedge shape part guiding elements
20 supporting seats
21 second base portions
22 axles
23 arms
The brake shoe of 24 cam facies
25 brake shoe S. A.s
26 fixing boots
27 spring directing pin
28 springs
29 activator portion
29A electromagnetism winding
29B plunger
29C plunger guiding piece
30 mention bar
Detailed description of the invention
Referring to Fig. 1 to Fig. 6, the emergency braking apparatus of the elevator involved by embodiments of the present invention is described.
In FIG, 1 represents hoist trunk, and 2A, 2B represent guide rail, and 3 represent lift car, and 4 represent counterbalanced weight, and 5 represent winch, and 6 represent drg, and 7 represent main hoist cable, and 8A, 8B represent emergency braking apparatus, and 9 represent control panel, 10 presentation code devices.Fig. 1 shows the brief configuration of general machine room-less elevator.In hoist trunk 1, be provided with pair of guide rails 2A, 2B, the lift car 3 be elevated under the guiding of guide rail 2A, 2B is connected by the main hoist cable 7 be wound on winch 5 with counterbalanced weight 4.By driving main hoist cable 7, lift car 3 and counterbalanced weight 4 are elevated.In addition, counterbalanced weight 4 also has guide rail (not shown).
Winch 5 is provided with drg 6.When winch 5 action, drg 6 is energized and braking force is disappeared, and when winch 5 is in halted state, the power supply of drg 6 is disconnected, and applies braking force thus by not shown retarding spring and not shown brake shoe to winch 5.The control panel 9 that whole lift facility is controlled is provided with near winch 5.This control panel 9 has the function of emergency braking apparatus control panel concurrently.Emergency braking apparatus control panel also can be provided separately with control panel 9.The bottom of lift car 3 is provided with emergency braking apparatus 8A, the 8B relative with guide rail 2A, 2B.Winch 5 is provided with coder 10, the signal sent from coder 10 is for controlling the speed of lift car and position.
In fig. 2,2S represents the wide format of guide rail 2,11 represent the first base portion, 16A, 16B, 16C, 16D represent anchor shaft, 17A, 17B represent wedge shape part, and 18,19 represent wedge shape part guiding elements, and 20 represent supporting seat, 21 represent the second base portion, and Fig. 2 is the integral structure figure of emergency braking apparatus 8A, 8B involved by present embodiment.
As shown in Figure 2, emergency braking apparatus 8A, 8B has the first base portion 11 being fixed on and lift car 3 being formed supporter.First base portion 11 is made up of side frame 11C, 11D of upper frame 11A, lower frame 11B and left and right.In the inside upper part of side frame 11C, 11D of left and right, the position relative with the wide format 2S of guide rail 2A, 2B is provided with guiding elements 18,19.As shown in Figure 4, guiding elements 18,19 is configured to have component 18a, 19a and directing plate 18b, 18c (not shown), 19b, 19c (not shown), component 18a, 19a are interposed between upside between being arranged between wide format 2S narrower, and it is wider in downside, form conical suface thus, directing plate 18b, 18c, 19b, 19c are for limiting wedge shape part 17A, 17B movement in the horizontal direction.
In addition, wedge shape part 17A, 17B as the first braking element are positioned at the position relative with guide rail 2A, 2B in the inner side of the conical suface of guiding elements 18,19, it has vertical brake surface in the side relative with the wide format 2S of guide rail 2A, 2B, and has reverse conical suface in the side relative with the conical suface of guiding elements 18,19.Wedge shape part 17A, 17B can move in the vertical direction under the guiding of guiding elements 18,19.
When elevator runs usually, as shown in Fig. 3 and Fig. 4 etc., wedge shape part 17A, 17B are positioned at the lower position of guiding elements 18,19, and guarantee there is sufficient gap between the wide format 2S of guide rail 2A, 2B, and when elevator there occurs the emergency state, wedge shape part 17A, 17B along conical suface, while relative to the first base portion 11 upward relative displacement, move towards guide rail 2A, 2B in the horizontal direction, contact with the wide format 2S of guide rail 2A, 2B and produce braking force.In addition, the below of wedge shape part 17A, 17B is provided with supporting seat 20, is provided with the actuating mechanism device the second base portion 21, second base portion 21 being provided with emergency braking apparatus 8A, 8B in the below of supporting seat 20.
In figure 3,13A, 13B represent stop-motion body directing pin, and 22 represent the axle be fixed in the first base portion, 23 represent arm, the brake shoe of 24 expression cam facies, and 25 represent brake shoe S. A.s, the directing pin of 27 expression springs 28,28 represent springs, and 29B represents plunger.Fig. 3 is the overall diagram of the actuating mechanism device of emergency braking apparatus 8A, 8B.As shown in Figure 3, actuating mechanism device is arranged in the second base portion 21, and the second base portion 21 is also made up of side frame 21C, 21D of upper frame 21A, lower frame 21B and left and right.Second base portion 21 is configured to be connected by the axle 22 be fixed on inside the first base portion 11, and can move upward along axle 22.
As shown in Figure 3 and Figure 5, the end side of arm 23A, 23B extends to the position relative with the wide format 2S of guide rail 2A, 2B from axle 22, is provided with brake shoe 24A, the 24B of the cam face as the second braking element at the position by rail-sides of its elongated end.Brake shoe 24A, 24B can rotate centered by brake shoe S. A. 25A, 25B in arbitrary scope, the cam face that the side face of brake shoe 24 is different in the diameter of starting at from brake shoe S. A. 25A, 25B.That is, different from S. A. 25 in center-of-gravity position cam facies.The upper frame 21A forming the second base portion 21 is provided with supporting seat 20, be provided with the not shown guiding groove for stop-motion body directing pin 13A, 13B in the inside of supporting seat 20, make wedge shape part 17A, 17B can respectively along the conical suface top offset in the horizontal direction of the guiding elements 18,19 shown in Fig. 2 and Fig. 4.
In the diagram, 2 represent guide rail, 12 expression the first elastic components, and 11 represent the first base portions, and 21 represent the second base portions, the supporting seat of 20 expression wedge shape parts 17, and 23 represent arm, the brake shoe of 24 expression cam facies.
Fig. 4 is the schematic diagram of emergency braking apparatus 8A, 8B when observing from front.State (with reference to Fig. 4 with reference to Fig. 5) when Fig. 4 (a) represents that arm 23A, 23B has under normal circumstances carried out action.The top of the first base portion 11 is provided with first elastic component 12A, 12B, and one end of first elastic component 12A, 12B is connected with side frame 11C, 11D of the first base portion 11, and the other end is connected with guiding elements 18,19.Guiding elements 18,19 is loosely chimeric with anchor shaft 16A, 16B, 16C, 16D.
State after Fig. 4 (b) expression wedge shape part 17A, 17B under the state shown in Fig. 4 (a) nip further along conical suface.When there occurs the emergency state, as shown in Fig. 4 (b), the outer peripheral face in cam face of brake shoe 24 is in the state abutted with guide rail 2.Be in cam outer peripheral face under this state to contact in order to face can be carried out with the contact surface of guide rail and do not form circular shape, but form rectilinear form, improve braking effect with this.
Fig. 4 (c) represents under the state shown in Fig. 4 (b), in order to remove the braking of emergency braking apparatus 8A, 8B, and the state after lift car 3 and the first base portion 11 be connected on lift car 3 are up mentioned.As shown in Fig. 4 (c), the position (state shown in Fig. 4 (b)) of guide rail is engaged from wedge shape part 17A, 17B, second base portion 21 is relatively being moved down relative to the first base portion 11, removes the stationary state (braking of wedge shape part is removed) of lift car thus.Wherein, under the state that the wedge shape part shown in Fig. 4 (b) is engaged with guide rail, in order to remove emergency braking apparatus 8, lift car 3 and the first base portion 11 be fixed on lift car 3 is forcibly made up to move a certain distance, now the second base portion 21 also rises in linkage together, utilize the cam face of the side face of brake shoe 24A, 24B, the wide format 2S moving contact of brake shoe 24A, 24B and guide rail 2A, 2B also rotates.Brake shoe 24A, 24B are designed to when rotating to the direction of mentioning the first base portion 11 upward, and guide rail 2A, 2B and the distance between brake shoe S. A. 25A, 25B expand.
In Figure 5,23 represent the arm being fulcrum with axle 22, the brake shoe of 24 expression cam facies, 28 represent Compress Spring (being in the spring of compressive state when elevator runs usually), 29 represent activator portion, 29A represents the electromagnetism winding of activator portion, and 29B represents the plunger of activator portion, and 29C represents the plunger guiding piece of activator portion.Fig. 5 is the birds-eye view of the different operating state of the arm represented in the emergency braking apparatus shown in Fig. 2.
Fig. 5 (a) is corresponding with Fig. 4 (a), represents that the power supply of activator portion 29 is cut off, the state that brake shoe 24A, 24B contact with guide rail 2A, 2B.Fig. 5 (b) is corresponding with Fig. 4 (c), represents that brake shoe 24A, 24B rotates and state after guide rail 2A, 2B and the distance between brake shoe S. A. 25A, 25B are expanded.Another side of brake shoe 24A, 24B of arm 23A, 23B extends from axle 22 towards the side contrary with guide rail 2A, 2B, and this extended end portion has actuating mechanism.
Actuating mechanism is formed by as the Compress Spring 28 of the second elastic component and activator portion 29, and Compress Spring 28 is loosely entrenched in the spring directing pin 27 arranged across arm 23A, 23B.Activator portion 29 by be fixed on arm 23B electromagnetism winding 29A, to be connected with arm 23A by plunger guiding piece 29C and the plunger 29B running through electromagnetism winding 29A and arm 23B is formed.
And, as shown in the arrow B of Fig. 5, after electromagnetism winding 29A excitation, Compress Spring 28 is compressed, plunger 29B is attracted by electromagnetism winding 29A, make the narrower intervals of the other end (spring 28 side) of arm 23A, 23B, leading section (brake shoe 24 side) broadens, and brake shoe 24A, 24B leave from the both sides of the wide format 2S of guide rail 2A, 2B.After brake shoe 24A, 24B leave from guide rail 2A, 2B, under the effect of the not shown torsional spring be connected with brake shoe S. A. 25A, 25B, brake shoe 24A, 24B turn back to position at ordinary times.Also can be arranged to adjust the center-of-gravity position of brake shoe 24A, 24B, make brake shoe 24A, 24B can turn back to state at ordinary times under the effect of deadweight.After brake shoe 24 leaves guide rail 2, when the position making brake shoe 24 turn back at ordinary times, as previously mentioned, the torsional spring be arranged on brake shoe can be utilized to carry out, also by carrying out adjustment to carry out to the center-of-gravity position be present on the position different from S. A. 25, and the adjustment of torsional spring and center-of-gravity position can also be can be used together.
In addition, as shown in Figure 5, to contact with guide rail 2 at brake shoe 24A, 24B and after rotating, the interval between electromagnetism winding 29A and plunger 29B shortens.Thus, energy required when plunger 29B being attracted by electromagnetism winding 29A when brake shoe 24A, 24B are left from guide rail 2A, 2B can be reduced.
Below the emergency braking action of the emergency braking apparatus involved by present embodiment when elevator moves downward is described.The lift facility with emergency braking apparatus 8A, the 8B that have employed said structure, when the velocity information of the lift car 3 detected by sensor is not judged as abnormal by control panel 9, runs usually.When lift facility runs usually, as shown in Fig. 5 (b), the electromagnetism winding 29A of activator portion 29 is excited and attracts plunger 29B, thus, Compress Spring 28 is compressed, consequently, the leading section (brake shoe 24 side) of arm 23A, 23B broadens, and brake shoe 24A, 24B leave from the both sides of the wide format 2S of guide rail 2A, 2B.Further, as shown in Figure 2, the second base portion 21 is positioned at lower position under the effect of deadweight, and wedge shape part 17A, 17B of being supported by the second base portion 21 are also directed to the lower position of guiding elements 18,19 and leave the wide format 2S of guide rail 2A, 2B.
On the other hand, when lift car carries out decline operation, when the velocity information of the lift car 3 detected by sensor is judged as abnormal by control panel, according to the instruction from control part, the excitation of the electromagnetism winding 29A of activator portion 29 is removed (energising is disconnected).After the excitation of electromagnetism winding 29A is removed, as shown in Fig. 4 (a) He Fig. 5 (a), Compress Spring 28 is released, the other end (spring 28 side) of arm 23A, 23B towards Fig. 5 (a) arrow A shown in direction open, leading section narrows simultaneously.Thus, brake shoe 24A, 24B towards Fig. 2 arrow C shown in direction displacement, pressurization clamping guide rail 2A, 2B thus.Along with lift car declines further, arm 23A, 23B and the second base portion 21 are slowed down, and the distance between the upper frame 11A of the first base portion 11 and the second base portion 21 relatively reduces.
Consequently, as shown in Fig. 4 (b), second base portion 21 relative to the relatively displacement upward of the first base portion 11, is arranged on wedge shape part 17A, 17B in the second base portion 21 along guiding elements 18,19 relative to the relatively displacement upward of the first base portion 11 along axle 22.Wedge shape part 17A, 17B are when displacement upward, along be arranged on the conical suface in the first base portion 11 towards Fig. 3 arrow D shown in direction displacement, and be pressed against on the wide format 2S of guide rail 2A, 2B, first base portion 11 is fixed on guide rail 2A, 2B, consequently, the decline of lift car 3 stops.
Below to shown in Fig. 4 (b) for keeping urgent effectively time state structure be described.The leading section (brake shoe side) of arm 23 is provided with not shown rotation stop-motion body (protruding body as stop-motion body).On the other hand, in the cam face of the outer peripheral face of brake shoe 24, be formed with the general planar face connecting circular arc, this tabular surface is the rotation stop-motion body bearing surface corresponding with above-mentioned rotation stop-motion body.When there occurs emergency situation in the process declined at elevator, by disconnecting the energising of electromagnetism winding, brake shoe 24 and guide rail 2 moving contact, rotate while move downward, under the state shown in Fig. 4 (b), in order to not make brake shoe 24 rotate, the rotation stop-motion body of arm abuts with the rotation stop-motion body bearing surface (tabular surface) of brake shoe 24, keeps the braking function of wedge shape part 17 as the first stopper element and the second stopper element thus effectively.
As mentioned above, when lift car 3 there occurs abnormal decline, cut off the energising of the activator portion 29 be arranged on arm 23A, 23B and make its action, driving wedge shape part 17A, 17B to produce braking force thus, make lift car 3 stop declining.So, when there occurs abnormal condition, by cutting off the energising of activator portion 29, and declining along with lift car and making wedge shape part 17 play pressurization clamping action and carry out wedge combination, promptly can produce braking force thus.
Below the releasing action of the lift car 3 that namely the releasing action of the emergency braking apparatus involved by present embodiment is fixed is described.When releasing is in the lift car 3 of emergency stop conditions, in order to remove the combination of wedge shape part, drives winch 5 by control panel 9, making lift car 3 increase.Meanwhile, electromagnetism winding 29A excitation (starting energising) is made.Along with lift car 3 rises, first base portion 11 also rises thereupon, that is, as shown in Fig. 4 (c), wedge shape part 17A, 17B relatively move downward relative to the first base portion 11, and along the first base portion 11 conical section towards Fig. 3 arrow E shown in direction move.Thus, the pressing force acted on guide rail wide format 2S is removed.In above-mentioned action, brake shoe 24A, 24B abut with guide rail 2A, 2B and rotate towards the direction of arrow shown in Fig. 4 (c) under the effect of the cam face of bias, guide rail 2A, 2B and the interval between brake shoe S. A. 25A, 25B expand, the narrower intervals (state shown in Fig. 5 (b)) between electromagnetism winding 29A and plunger 29B.
After distance between electromagnetism winding 29A and plunger 29B diminishes, together with the electromagnetism winding 29A of firm excitation attracts with plunger 29B.Plunger 29B displacement because of this attraction, brake shoe 24A, 24B is made to leave guide rail 2A, 2B, second base portion 21 moves towards bottom position under the effect of deadweight, wedge shape part 17A, 17B of being supported by the second base portion 21 are also directed into the bottom position of the guiding elements 18,19 of emergency braking apparatus 8A, 8B, thus leave from the both sides of the wide format 2S of guide rail 2A, 2B.
So, when removing the braking of emergency braking apparatus, the initial displacement of plunger 29B is the Mechanical Moving that the bias of brake shoe 24A, the 24B rotated by abutting with guide rail 2A, 2B causes, the plunger 29B after Mechanical Moving and electromagnetism winding 29A close to and by its electromagnetic attracting force.Therefore, the activator portion 29 for removing emergent stopping can realize low capacity.
Other structure example referring to emergency braking apparatus 8A, 8B involved by accompanying drawing 6 pairs of present embodiments is described.Fig. 6 (a) represents the manner of execution of the emergency braking apparatus 8 of elevator at ordinary times under running state.As shown in Fig. 6 (a), emergency braking apparatus 8A, 8B are fixed on lift car 3, have the first base portion 11 forming supporter.First base portion 11 is made up of side frame 11C, 11D of upper frame 11A, lower frame 11B and left and right.In the inside upper part of side frame 11C, 11D of left and right, the position relative with the wide format 2S of guide rail 2A, 2B is provided with guiding elements 18,19.Guiding elements 18,19 is configured to have component 18a, 19a and directing plate 18b, 18c (not shown), 19b, 19c (not shown), component 18a, 19a are interposed between upside between being arranged between wide format 2S narrower, and it is wider in downside, form conical suface thus, directing plate 18b, 18c, 19b, 19c are for limiting wedge shape part 17A, 17B movement in the horizontal direction.
The top of the first base portion 11 is provided with first elastic component 12A, 12B, and one end of first elastic component 12A, 12B is connected with side frame 11C, 11D of the first base portion 11, and the other end is connected with guiding elements 18,19.Guiding elements 18,19 is loosely chimeric with anchor shaft 16A, 16B, 16C, 16D.In addition, wedge shape part 17A, 17B as the first braking element are positioned at the position relative with guide rail 2A, 2B in the inner side of the conical suface of guiding elements 18,19, it has vertical brake surface in the side relative with the wide format 2S of guide rail 2A, 2B, and has reverse conical suface in the side relative with the conical suface of guiding elements 18,19.Wedge shape part 17A, 17B can move at above-below direction under the guiding of guiding elements 18,19.
When elevator runs usually, wedge shape part 17A, 17B are positioned at the lower position of guiding elements 18,19, and and guarantee there is sufficient gap between the wide format 2S of guide rail 2A, 2B.When elevator there occurs the emergency state, wedge shape part 17A, 17B are along the conical suface of guiding elements 18,19, while relative to the first base portion 11 upward relatively displacement, move towards guide rail 2A, 2B in the horizontal direction, contact with the wide format 2S of guide rail 2A, 2B and produce braking force.In addition, the below of wedge shape part 17A, 17B is provided with supporting seat 20.
Be provided with the guiding groove (not shown) for directing pin (not shown) in the inside of supporting seat 20, make wedge shape part 17A, 17B can respectively along the conical suface top offset in the horizontal direction of the guiding elements 18,19 shown in Fig. 6 (a).Supporting seat 20 is connected with the actuating mechanism device of emergency braking apparatus 8A, 8B by mentioning bar 30.
As shown in Fig. 6 (a), actuating mechanism device has the second base portion 21.Second base portion 21 is provided with arm 23, and this arm 23 rotates to arrange relative to narrow of guide rail 2A, 2B centered by axle 22 in vertical direction.The side of arm 23 is connected with the extension spring 28 as the second elastic component.The opposite side of arm 23 be provided with as the second braking element brake shoe 24 and be positioned at the activator portion 29 of most end.
Brake shoe 24 can rotate centered by S. A. 25 in arbitrary scope, activator portion 29 by the electromagnetism winding 29A be fixed in the second base portion 21, to be connected with arm 23 by plunger guiding piece 29C and the plunger 29B running through electromagnetism winding 29A and arm 23B is formed.The opposition side in the face abutted with brake shoe 24 of guide rail 2A, 2B is provided with fixing boots 26.In the structure example shown in Fig. 6, be only provided with arm 23, spring 28, brake shoe 24 and activator portion 29 in side, but also above-mentioned component can be all set in both sides.
Fig. 6 (b) represents under the state of Fig. 6 (a), makes arm 23 action, the state after making wedge shape part 17A, 17B nip guide rail along conical suface thus by making the energising of electromagnetism winding 29A disconnect.
Fig. 6 (c) represents under the state of Fig. 6 (b), in order to remove the braking of emergency braking apparatus 8A, 8B, and the state after the first base portion 11 is up mentioned.As shown in Fig. 6 (c), from the position that wedge shape part 17A, 17B are engaged with guide rail (state shown in Fig. 6 (b)), second base portion 21 is moved downward relative to the first base portion 11, removes the stationary state of lift car thus.In addition, under the state that the wedge shape part shown in Fig. 6 (b) is engaged with guide rail, in order to remove the braking of emergency braking apparatus 8, lift car 3 and the first base portion 11 be fixed on lift car 3 is forcibly made up to move a certain distance, now the second base portion 21 also rises in linkage together, utilize the cam face of the side face of brake shoe 24A, 24B, brake shoe 24A, 24B and guide rail 2A, 2B moving contact also rotate.Brake shoe 24A, 24B are designed to when rotating towards the direction of mentioning the first base portion 11, and guide rail 2A, 2B and the distance between brake shoe S. A. 25A, 25B expand.
After electromagnetism winding 29A excitation, as shown in the arrow F in Fig. 6 (c), extension spring 28 is stretched, and plunger 29B is attracted by electromagnetism winding 29A, makes brake shoe 24 leave the wide format of guide rail 2A, 2B.
After brake shoe 24A, 24B leave from guide rail 2A, 2B, under the effect of the not shown torsional spring be connected with brake shoe S. A. 25, brake shoe 24A, 24B turn back to position at ordinary times.Also can be arranged through and the center-of-gravity position of brake shoe (having cam face) is adjusted, make brake shoe 24A, 24B can turn back to state at ordinary times under the effect of deadweight.In addition, as shown in Fig. 6 (c), after brake shoe 24 rotates, the interval between electromagnetism winding 29A and plunger 29B shortens.Thus, energy required when plunger 29B being attracted by electromagnetism winding 29A when brake shoe 24 is left from guide rail 2A, 2B can be reduced.
In the structure example of the emergency braking apparatus shown in Fig. 6, the details of the releasing action of emergency braking action when elevator moves down and lift car 3 is identical with the various actions in the structure example shown in Fig. 4 with Fig. 5, so quote the explanation of the structure example shown in Fig. 4 and Fig. 5.In addition, when removing the braking of emergency braking apparatus, the initial displacement of plunger 29B is the Mechanical Moving that the bias of the brake shoe 24A rotated by abutting with guide rail 2A causes, and the plunger 29B after Mechanical Moving and electromagnetism winding 29A is close and by its electromagnetic attracting force.Therefore, the activator portion 29 for removing emergent stopping can realize low capacity.
As mentioned above, the braking element of Braking-force generator by being pressurizeed clamping guide rail and the Braking-force generator that makes lift car stop declining and make the actuating mechanism device of the braking element action of Braking-force generator form when the descending speed of lift car has exceeded specified value by braking element, and is configured to the cam face that can rotate in any range by embodiments of the present invention.By adopting said structure, braking force can be produced with the time short as far as possible when braking, and when brake release, utilize the energy of mentioning lift car that the brake shoe of cam face is rotated, actuator can be made thus to turn back to position close to peacetime state, consequently, the capacity of the actuator needed for recovery can be reduced.
Claims (10)
1. an emergency braking apparatus for elevator, described elevator has: lift car, and described lift car is elevated under the guiding being erected to the guide rail be arranged in hoist trunk; Counterbalanced weight, described counterbalanced weight is connected with described lift car by main hoist cable; Drive the winch of described main hoist cable; And emergency braking apparatus, described emergency braking apparatus is arranged on described lift car, and for applying braking force to described lift car, the feature of the emergency braking apparatus of described elevator is,
Described emergency braking apparatus has the first base portion and the second base portion, and described first base portion is fixed on described lift car, and described second base portion can relative to the longitudinal axis displacement be in the vertical direction supported in described first base portion,
Be provided with in described second base portion: the first braking element of cleat shape, described first braking element carries out pressurization clamping to described guide rail; A pair arm, described arm is supported for can with the described longitudinal axis for fulcrum; Second braking element of cam face, described second braking element is positioned at the end side of described a pair arm, for carrying out pressurization clamping to described guide rail; And actuator, described actuator is arranged on another side of described a pair arm, for making described second braking element leave described guide rail,
Emergency braking is carried out when removing the state of the emergency braking of clamping of carrying out from described first braking element and described second braking element described guide rail pressurizeing, second braking element of described cam face moves interlock with the rising of the described lift car undertaken by operating, thus while abut with described guide rail while rotate, interval between the electromagnetism winding of the described actuator of another side being arranged on described arm and plunger is reduced, the stage of described actuator after described interval reduces starting when described emergency braking is removed to be energized carries out action, second braking element of described cam face is separated with described guide rail.
2. the emergency braking apparatus of elevator as claimed in claim 1, is characterized in that,
Described second braking element has cam face, make when carrying out described emergency braking and removing, at the second braking element of described cam face while abut with described guide rail while when rotating, the centre of gration of described second braking element and the distance between described second braking element and the contact point of described guide rail contact increase.
3. the emergency braking apparatus of elevator as claimed in claim 1 or 2, is characterized in that,
In the rotary area of the second braking element of described cam face, described arm is provided with rotation stop-motion body,
The outer peripheral face of described second braking element is provided with the rotation stop-motion body bearing surface corresponding with described rotation stop-motion body, when having carried out described emergency braking under making the state declined at elevator, second braking element of described cam face and described guide rail abut, and exceed beyond the rotating range of regulation to avoid the rotation of described second braking element.
4. the emergency braking apparatus of elevator as claimed in claim 1 or 2, is characterized in that,
Second braking element of described cam face is configured to its center-of-gravity position is positioned at described rail-sides opposition side relative to the centre of gration of described second braking element, make in the action by described actuator after the second braking element of described cam face and described guide rail are separated, described second braking element automatically can return to position when usually running.
5. the emergency braking apparatus of elevator as claimed in claim 1 or 2, is characterized in that,
Second braking element of described cam face is provided with the spring that described second braking element is rotated relative to its centre of gration,
After the action by described actuator makes the second braking element of described cam face and described guide rail separate, described second braking element is made to automatically restore to position when usually running by described spring.
6. an emergency braking apparatus for elevator, described elevator has: lift car, and described lift car is elevated under the guiding being erected to the guide rail be arranged in hoist trunk; Counterbalanced weight, described counterbalanced weight is connected with described lift car by main hoist cable; Drive the winch of described main hoist cable; And emergency braking apparatus, described emergency braking apparatus is arranged on described lift car, and for applying braking force to described lift car, the feature of the emergency braking apparatus of described elevator is,
Described emergency braking apparatus has the first base portion and the second base portion, and described first base portion is fixed on described lift car, and described second base portion can relative to the displacement in the vertical direction of described first base portion,
Be provided with in described second base portion: the first braking element of cleat shape, described first braking element carries out pressurization clamping to described guide rail; Arm, described arm rotates centered by axle in the side of described guide rail; Second braking element of cam face, described second braking element is supported on described arm, carries out pressurization clamp together with fixing boots to described guide rail; Carrying up component, described carrying up component is connected with the supporting seat of described first braking element; Plate portion is set, described the described arm and described fixing boots that plate portion are provided with and are connected with described carrying up component are set; Spring, described spring is arranged on the end side of described arm, for by described second braking element by being pressed in described guide rail; And actuator, described actuator is arranged on another side of described arm, for making described second braking element leave described guide rail,
Emergency braking is carried out when removing the state of the emergency braking of clamping of carrying out from described first braking element and described second braking element described guide rail pressurizeing, second braking element of described cam face moves interlock with the rising of the described lift car undertaken by operating, thus while abut with described guide rail while rotate, interval between the electromagnetism winding of the described actuator of another side being arranged on described arm and plunger is reduced, the stage of described actuator after described interval reduces starting when described emergency braking is removed to be energized carries out action, second braking element of described cam face is separated with described guide rail.
7. the emergency braking apparatus of elevator as claimed in claim 6, is characterized in that,
Described second braking element has cam face, make when carrying out described emergency braking and removing, at the second braking element of described cam face while abut with described guide rail while when rotating, the centre of gration of described second braking element and the distance between described second braking element and the contact point of described guide rail contact increase.
8. the emergency braking apparatus of elevator as claimed in claims 6 or 7, is characterized in that,
In the rotary area of the second braking element of described cam face, described arm is provided with rotation stop-motion body,
The outer peripheral face of described second braking element is provided with the rotation stop-motion body bearing surface corresponding with described rotation stop-motion body, when having carried out described emergency braking under making the state declined at elevator, second braking element of described cam face and described guide rail abut, and exceed beyond the rotating range of regulation to avoid the rotation of described second braking element.
9. the emergency braking apparatus of elevator as claimed in claims 6 or 7, is characterized in that,
Second braking element of described cam face is configured to its center-of-gravity position is positioned at described rail-sides opposition side relative to the centre of gration of described second braking element, make in the action by described actuator after the second braking element of described cam face and described guide rail are separated, described second braking element automatically can return to position when usually running.
10. the emergency braking apparatus of elevator as claimed in claims 6 or 7, is characterized in that,
Second braking element of described cam face is provided with the spring that described second braking element is rotated relative to its centre of gration,
After the action by described actuator makes the second braking element of described cam face and described guide rail separate, described second braking element is made to automatically restore to position when usually running by described spring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011155716A JP5345183B2 (en) | 2011-07-14 | 2011-07-14 | Elevator emergency stop device |
| JP2011-155716 | 2011-07-14 |
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| CN102874669A CN102874669A (en) | 2013-01-16 |
| CN102874669B true CN102874669B (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210238558.4A Active CN102874669B (en) | 2011-07-14 | 2012-07-10 | Emergency braking device of elevator |
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| JP (1) | JP5345183B2 (en) |
| CN (1) | CN102874669B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110482366A (en) * | 2018-05-15 | 2019-11-22 | 奥的斯电梯公司 | The electronic security(ELSEC) actuator of grip wedge for hoisting elevator |
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| EP3331798B1 (en) | 2015-08-04 | 2023-05-17 | Otis Elevator Company | Device and method for actuating an elevator safety brake |
| CN105858398B (en) * | 2016-05-09 | 2018-06-26 | 浙江西子富沃德电机有限公司 | A kind of safety device for preventing accidental movement of elevator cage |
| CN106044605B (en) * | 2016-06-07 | 2018-11-06 | 苏州博量电梯科技有限公司 | Brake device for elevator and method |
| CN105883529B (en) * | 2016-06-21 | 2018-07-03 | 浙江屹立电梯有限公司 | A kind of gradual elevator safety tong of self-balancing |
| US10569993B2 (en) | 2017-03-29 | 2020-02-25 | Otis Elevator Company | Safety brake actuation mechanism for a hoisted structure |
| US10562739B2 (en) * | 2017-08-25 | 2020-02-18 | Otis Elevator Company | Synchronized electronic safety actuator |
| JP2019089643A (en) * | 2017-11-16 | 2019-06-13 | 株式会社日立製作所 | Emergency stop device and elevator |
| CN109894907A (en) * | 2017-12-07 | 2019-06-18 | 上海铼钠克数控科技股份有限公司 | Brake apparatus |
| DE202019101479U1 (en) * | 2019-03-15 | 2020-06-18 | Inventio Ag | Safety brake device |
| CN109911739B (en) * | 2019-03-18 | 2024-02-09 | 杭州优迈科技有限公司 | Bidirectional safety tongs for elevator and elevator |
| US11524873B2 (en) * | 2020-10-02 | 2022-12-13 | Otis Elevator Company | Ropeless elevator wheel force releasing system |
| WO2023152979A1 (en) * | 2022-02-14 | 2023-08-17 | 三菱電機株式会社 | Elevator emergency stop actuator |
| WO2023175716A1 (en) * | 2022-03-15 | 2023-09-21 | 株式会社日立製作所 | Elevator device |
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| CN110482366B (en) * | 2018-05-15 | 2021-11-19 | 奥的斯电梯公司 | Electric safety actuator for safety wedges of elevators |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102874669A (en) | 2013-01-16 |
| JP5345183B2 (en) | 2013-11-20 |
| JP2013018645A (en) | 2013-01-31 |
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