CN104340805A - Emergency braking device and elevator - Google Patents
Emergency braking device and elevator Download PDFInfo
- Publication number
- CN104340805A CN104340805A CN201410379585.2A CN201410379585A CN104340805A CN 104340805 A CN104340805 A CN 104340805A CN 201410379585 A CN201410379585 A CN 201410379585A CN 104340805 A CN104340805 A CN 104340805A
- Authority
- CN
- China
- Prior art keywords
- guide rail
- brake shoe
- sliding component
- initial stage
- emergency braking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/22—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of linearly-movable wedges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides an emergency braking device and an elevator. The emergency braking device is provided with a stable brake performance. The emergency braking device is arranged on the lower part of an elevating body which is guided to go up and down by a guide rail, and is provided with a brake shoe and an elastic body, the brake shoe is provided with a sliding surface which slides relative to the guide rail, the elastic body applies a pressure to the brake shoe, and therefore the sliding surface of the brake shoe is pressed on the guide rail. The emergency braking device is characterized in that the sliding surface of the brake shoe comprises an incipient sliding component and a final sliding component, during the period from the sliding incipient stage of the brake shoe relative to the guide rail to the stop of the elevating body, the incipient sliding component slides relative to the guide rail, during the period from the sliding final stage when a certain amount of the incipient sliding component is worn, and the final sliding component is contacted with the guide rail to the stop of the elevating body, the final sliding component slides relative to the guide rail.
Description
Technical field
The present invention relates to emergency braking apparatus and lift facility.
Background technology
In general, in lift facility, as one of safety device, the bottom of lift car is provided with emergency braking apparatus, when the descending speed of lift car has exceeded specified speed, by emergency braking apparatus, elevator car safety is stopped.Emergency braking apparatus is formed primarily of brake shoe and elastic body.
Brake shoe is wedge-like, when the descending speed of lift car has exceeded specified speed, brake shoe towards lift car ascent direction displacement and at slide on rails.On the other hand, elastic body is for giving pressing force and by brake shoe by being pressed in guide rail to brake shoe.Brake shoe by elastic body by the state be pressed on guide rail under slide, so can certain friction force be produced and play braking force between brake shoe and guide rail.
Patent Document 1 discloses a kind of brake shoe structure, this brake shoe has the sliding surface at slide on rails, and is embedded with multiple brake plate in the mode outstanding from sliding surface.Brake plate is cylindric or the polygon prism shape of chamfering has been carried out in bight, is made up of the composite material being at least dispersed with a kind of ceramic particle.
Patent documentation 1: the flat 10-182031 publication of Japanese Patent Laid-Open
In general, the occasion adopting homogenous material to make the sliding surface of brake shoe, if the speed (sliding velocity) of the brake shoe of brake shoe during slide on rails declines, then the friction coefficient of sliding surface increases, thus causes braking force to increase.The sliding surface of the brake shoe disclosed in patent documentation 1 is made owing to adopting single stupalith, so as mentioned above, along with the decline of sliding velocity, the braking force of brake shoe strengthens.Consequently, exist and cause acceleration/accel to improve (namely causing elevator emergency to brake), make the problem that deceleration and stopping performance becomes unstable.
Summary of the invention
The present invention makes when considering the problems referred to above, the object of the present invention is to provide a kind of emergency braking apparatus and lift facility of the deceleration and stopping performance that can play stably.
In order to solve the problem, the emergency braking apparatus that the present invention relates to is arranged on the bottom of the lifting body be elevated by rail guidance, and there is brake shoe and elastic body, described brake shoe has and carries out relative to guide rail the sliding surface that slides, described elastic body gives pressing force to brake shoe, thus by the sliding surface of brake shoe by being pressed on guide rail, the feature of described emergency braking apparatus is, the sliding surface of brake shoe is formed by initial stage sliding component and later stage sliding component, during the slip initial stage of sliding from relative to guide rail plays till lifting body stops, initial stage sliding component slides relative to guide rail, wearing away during a certain amount of and slip later stage after making later stage sliding component and guide rail contact plays till lifting body stops from initial stage sliding component, later stage sliding component slides relative to guide rail.
In order to solve the problem, the lift facility that the present invention relates to is provided with emergency braking apparatus in the bottom of lifting body, described emergency braking apparatus has brake shoe and elastic body, described brake shoe has relative to guiding the guide rail of lifting body to carry out the sliding surface slided, described elastic body gives pressing force to brake shoe, thus by the sliding surface of brake shoe by being pressed on guide rail, the feature of described lift facility is, the sliding surface of brake shoe is formed by initial stage sliding component and later stage sliding component, during the slip initial stage of sliding from relative to guide rail plays till lifting body stops, initial stage sliding component slides relative to guide rail, wearing away during a certain amount of and slip later stage after making later stage sliding component and guide rail contact plays till lifting body stops from initial stage sliding component, later stage sliding component slides relative to guide rail.
Invention effect
According to the present invention, the deceleration and stopping performance that can play stably.
Accompanying drawing explanation
Fig. 1 is the integral structure figure of lift facility.
Fig. 2 is the integral structure figure of emergency braking apparatus.
Fig. 3 is the integral structure figure of the brake shoe at slip initial stage.
Fig. 4 is the integral structure figure of the brake shoe in slip later stage.
Nomenclature
1 guide rail
2 lift cars
3 main hoist cables
4 counterbalanceds weight
5 winchs
6 governors
7 speed controller ropes
8 mention mechanism
10 emergency braking apparatus
11 brake shoes
12 leaf springs (elastic body)
13 guiding elements
14 rollers
15 initial stage sliding components (metallic material)
16 later stage sliding components (pottery)
Detailed description of the invention
Below, with reference to accompanying drawing, one embodiment of the present invention is described in detail.
Fig. 1 represents the integral structure of the lift facility 100 of present embodiment.Lift facility 100 has: erect the guide rail 1 be arranged on not shown building structure; The lift car 2 be elevated is carried out under the guiding of this guide rail 1; The main hoist cable 3 that one end and this lift car 2 link; Link with the other end of this main hoist cable 3 and under the guiding of guide rail 1, carry out the counterbalanced weight 4 that is elevated; Be fixed on building structure, for driving the winch 5 of main hoist cable 3 wound thereon; Be bearing on building structure, for detecting the governor 6 of the rising or falling speed of lift car 2; Be wound on this governor 6, speed controller rope 7 synchronization-moving with lift car 2; Be bearing on lift car 2, and link with speed controller rope 7 mention mechanism 8; And link with the end of mentioning mechanism 8, and be arranged on the emergency braking apparatus 10 of the bottom of lift car 2.
In the lift facility 100 with said structure, the descending speed of lift car 2 because of accidental cause beyond specified speed time, emergency braking apparatus 10 action.
Fig. 2 represents the integral structure of emergency braking apparatus 10.Emergency braking apparatus 10 has: the brake shoe 11 of wedge-like, and it is arranged in pairs in the mode relative with the sliding surface of guide rail 1, and has dip plane in the side contrary with guide rail; Elastic body, when the speed of lift car 2 has exceeded specified speed, this elastic body by each brake shoe 11 by being pressed on guide rail 1, the leaf spring 12 of this elastomer U-shaped in this way; One pair roller 14, this pair roller 14 is arranged along the side contrary with guide rail of brake shoe 11; And a pair guiding elements 13, this pair guiding elements 13 is arranged between roller 14 and leaf spring 12, and has the dip plane parallel with the dip plane of brake shoe 11 in roller 14 side.
Detected by governor 6 descending speed of lift car 2 because of unexpected reason beyond specified speed time, the speed controller rope 7 be wound on governor 6 is clamped, and is mentioned by brake shoe 11 by mentioning mechanism 8.Brake shoe 11 is raised after mechanism 8 mentions, and its sliding surface contacts with guide rail 1 and slides on guide rail 1, and its dip plane makes leaf spring 12 that elastic displacement occur by roller 14 and guiding elements 13.After elastic displacement occurs leaf spring 12, give pressing force and by brake shoe 11 by being pressed on guide rail 1 to brake shoe 11.Consequently, by the friction of the sliding surface of the pressing force that produced by leaf spring 12 and brake shoe 11, lift car 2 is stopped.
Fig. 3 represents the integral structure of the brake shoe 11 at slip initial stage.The sliding surface that brake shoe 11 is configured to slide on guide rail 1 has multiple-structure.Specifically, the sliding surface of brake shoe 11 is formed by initial stage sliding component 15 and later stage sliding component 16, from guide rail 1 slide the slip initial stage play lift car 2 stop till during, this initial stage sliding component 15 slides on guide rail 1, the slip later stage after being worn from initial stage sliding component 15 because of slip play lift car 2 stop till during, this later stage sliding component 16 slides together with initial stage sliding component 15 on guide rail 1.
Initial stage sliding component 15 adopts the metallic material that can produce great friction coefficient when sliding on the guide rail 1 be made up of metallic material to form.On the other hand, later stage sliding component 16 adopts when sliding on guide rail 1 and can produce the friction coefficient lower than metallic material and the pottery of excellent abrasion resistance formation.
At this, the braking force of emergency braking apparatus 10 is obtained according to the product of the pressing force of leaf spring 12 and the friction coefficient of sliding surface.A certain amount of braking force can be reduced by the minimizing pressing force of leaf spring 12 or the friction coefficient of sliding surface, elevator can be avoided thus to produce the phenomenon of high acceleration (sudden stop).
In the present embodiment, during the slip initial stage of carrying out sliding from initial stage sliding component 15 plays till later stage sliding component 16 starts the slip later stage of carrying out sliding together with initial stage sliding component 15, initial stage sliding component 15 produces wearing and tearing because of slip.Because the displacement of leaf spring 12 correspondingly reduces, so can reduce the pressing force of leaf spring 12 with the thickness be worn.Thereby, it is possible to reduction braking force.
Fig. 4 represents the integral structure of the brake shoe 11 after the later stage of sliding.Brake shoe 11 after the slip later stage is configured to, and initial stage sliding component 15 produces wearing and tearing because of slip, and initial stage sliding component 15 and later stage sliding component 16 are arranged on same sliding surface.Later stage sliding component 16 is formed, so have high abrasion resistance owing to adopting pottery.Therefore, later stage sliding component 16 start slip the slip later stage after the wearing and tearing of sliding surface of brake shoe 11 little.Therefore, the pressing force of leaf spring 12 can not be reduced to the degree that lift car 2 cannot be made to stop.
In addition, as shown in Figure 3 and Figure 4, with regard to the friction coefficient of the sliding surface of brake shoe 11, friction coefficient when only using initial stage sliding component 15 is set as μ (Fig. 3), when the friction coefficient of entirety when simultaneously using initial stage sliding component 15 and later stage sliding component 16 is set as μ ' (Fig. 4), meet the relation of μ > μ '.Therefore, after the slip later stage, because the friction coefficient of sliding surface reduces, so can braking force be reduced.
As mentioned above, according to the present embodiment, during till the slip initial stage plays the later stage of sliding, the pressing force that wearing and tearing reduce leaf spring 12 is there is by making initial stage sliding component 15, in order to reduce braking force after the slip later stage, by coefficientoffrictionμ ' be set smaller than coefficientoffrictionμ, the deceleration and stopping performance can played stably when elevator can not be made to produce high acceleration (sudden stop) thus.Especially the high acceleration produced after can suppressing the slip later stage of reducing in sliding velocity, thus the deceleration and stopping performance that can play stably.
The sliding surface of the brake shoe 11 of present embodiment is configured to be provided with initial stage sliding component 15 and later stage sliding component 16, later stage sliding component 16 is embedded in the sliding surface position more on the lower than the initial stage, but the present invention is not limited to this, as long as only make initial stage sliding component 15 carry out sliding at the slip initial stage and make it wear and tear, after the slip later stage, make initial stage sliding component 15 and later stage sliding component 16 carry out the multiple-structure slided simultaneously.
In addition, make initial stage sliding component 15 and later stage sliding component 16 carry out the structure of sliding after wearing and tearing, so need in principle to change after each because the brake shoe 11 in present embodiment is configured to sliding component 15 in the early stage simultaneously.But, just in case because of carelessness not to the occasion that brake shoe 11 is changed, certain pressing force that the brake shoe 11 (Fig. 4) slided after the later stage also can rely on leaf spring 12 to produce and the coefficientoffrictionμ of sliding surface ' lift car 2 is stopped.
And, in the present embodiment, be illustrated for the emergency braking apparatus 10 be arranged on as on the lift car 2 of lifting body, but the present invention is not limited to this, being arranged on emergency braking apparatus 10 as the occasion on the counterbalanced weight 4 of lifting body, also same deceleration and stopping performance can be played.
Claims (4)
1. an emergency braking apparatus, it is arranged on the bottom of the lifting body be elevated by rail guidance, and there is brake shoe and elastic body, described brake shoe has and carries out relative to described guide rail the sliding surface that slides, described elastic body gives pressing force to described brake shoe, thus by the sliding surface of described brake shoe by being pressed on described guide rail, the feature of described emergency braking apparatus is
The sliding surface of described brake shoe is formed by initial stage sliding component and later stage sliding component,
During the slip initial stage of sliding from relative to described guide rail plays till described lifting body stops, described initial stage sliding component slides relative to described guide rail,
Wearing away during a certain amount of and slip later stage after making described later stage sliding component and described guide rail contact plays till described lifting body stops from described initial stage sliding component, described later stage sliding component slides relative to described guide rail.
2. emergency braking apparatus as claimed in claim 1, is characterized in that,
Described initial stage sliding component is made up of metallic material,
Described later stage sliding component is made up of pottery.
3. emergency braking apparatus as described in claim 1 or 2, is characterized in that,
Described lifting body is lift car or counterbalanced weight.
4. a lift facility, it is provided with emergency braking apparatus in the bottom of lifting body, described emergency braking apparatus has brake shoe and elastic body, described brake shoe has relative to guiding the guide rail of described lifting body to carry out the sliding surface slided, described elastic body gives pressing force to described brake shoe, thus by the sliding surface of described brake shoe by being pressed on described guide rail, the feature of described lift facility is
The sliding surface of described brake shoe is formed by initial stage sliding component and later stage sliding component,
During the slip initial stage of sliding from relative to described guide rail plays till described lifting body stops, described initial stage sliding component slides relative to described guide rail,
Wearing away during a certain amount of and slip later stage after making described later stage sliding component and described guide rail contact plays till described lifting body stops from described initial stage sliding component, described later stage sliding component slides relative to described guide rail.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013166170A JP2015034081A (en) | 2013-08-09 | 2013-08-09 | Emergency stop device and elevator device |
| JP2013-166170 | 2013-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104340805A true CN104340805A (en) | 2015-02-11 |
Family
ID=52497364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410379585.2A Pending CN104340805A (en) | 2013-08-09 | 2014-08-04 | Emergency braking device and elevator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2015034081A (en) |
| CN (1) | CN104340805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108341317A (en) * | 2017-01-25 | 2018-07-31 | 奥的斯电梯公司 | Elevator brake wedge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR9390E (en) * | 1906-03-28 | 1908-10-19 | Societe Vernes, Guinet, Sigros Et Cie | Safety parachute for lifts and freight elevators |
| DE925071C (en) * | 1953-01-22 | 1955-03-10 | Baudet Ets | Wedge safety device on people and goods lifts |
| JPS5299550A (en) * | 1976-02-16 | 1977-08-20 | Mitsubishi Electric Corp | Exhaust gas intake type forced intake and exhaust gas burner |
| JPS5943781A (en) * | 1982-09-01 | 1984-03-10 | 三菱電機株式会社 | Emergency stop device for elevator |
| JPS62230586A (en) * | 1986-03-29 | 1987-10-09 | 株式会社東芝 | Emergency stop device for elevator |
-
2013
- 2013-08-09 JP JP2013166170A patent/JP2015034081A/en active Pending
-
2014
- 2014-08-04 CN CN201410379585.2A patent/CN104340805A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR9390E (en) * | 1906-03-28 | 1908-10-19 | Societe Vernes, Guinet, Sigros Et Cie | Safety parachute for lifts and freight elevators |
| DE925071C (en) * | 1953-01-22 | 1955-03-10 | Baudet Ets | Wedge safety device on people and goods lifts |
| JPS5299550A (en) * | 1976-02-16 | 1977-08-20 | Mitsubishi Electric Corp | Exhaust gas intake type forced intake and exhaust gas burner |
| JPS5943781A (en) * | 1982-09-01 | 1984-03-10 | 三菱電機株式会社 | Emergency stop device for elevator |
| JPS62230586A (en) * | 1986-03-29 | 1987-10-09 | 株式会社東芝 | Emergency stop device for elevator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108341317A (en) * | 2017-01-25 | 2018-07-31 | 奥的斯电梯公司 | Elevator brake wedge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015034081A (en) | 2015-02-19 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |