CN1315712C - Safety apparatus for maintenance of elevator systems from top of the car - Google Patents
Safety apparatus for maintenance of elevator systems from top of the car Download PDFInfo
- Publication number
- CN1315712C CN1315712C CNB028167120A CN02816712A CN1315712C CN 1315712 C CN1315712 C CN 1315712C CN B028167120 A CNB028167120 A CN B028167120A CN 02816712 A CN02816712 A CN 02816712A CN 1315712 C CN1315712 C CN 1315712C
- Authority
- CN
- China
- Prior art keywords
- car
- pillar
- elevator
- elevator system
- vertical position
- 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.)
- Expired - Fee Related
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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
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
- B66B5/0056—Safety of maintenance personnel by preventing crushing
- B66B5/0062—Safety of maintenance personnel by preventing crushing by devices, being operable or not, mounted on the elevator car
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
Apparatus for protecting a workman mounted upon the roof of a traction elevator car. A vertical column is secured to the rooftop area of the car. In one embodiment, the column is capable of withstanding a compressive load that is greater than the disengagement load of the drive mechanism of the car. In another embodiment, a harness is attached near the top of the column by a lanyard.
Description
Technical field
The present invention relates generally to a kind of traction drive elevators system, particularly a kind of safety guard that is used to protect the maintainer who works on the elevator car top.
Background technology
As known in the industry, many maintenance works of elevator are implemented by the elevator car top.For this reason, be fixed with an inspection box, wherein be provided with control setup and can allow the service worker that stands on the car roof move with low speed control elevator at car top.The mechanical part that now increasing traction drive elevators system will be arranged in the machine room usually is placed in the hoistway.Well headroom is sealed by the roof, when cage operation only leaves very little head room between elevator car top and the roof during to the top layer parking place.Therefore, the maintenance man that stands on the car roof can move to cab the position of extremely pressing close to well headroom with the control setup of inspection box.Thereby, may be trapped in car top and be arranged between the structure of well headroom at the maintenance man on the car roof.
And, owing to concerning a people who on car roof, works, have the danger that may crash into hoistway all the time, under the situation that does not have actv. car top guardrail to be protected, to put on safety when requiring maintenance man on car roof, to work sometimes and girdle the waist from car.Each surcoat has a rope makes the workman free movable in the face zone atop.These ropes are relatively grown and are generally all tied up to than on the higher crossbeam that is across the raising legs on the car roof of end face.In any case rope has a large amount of lax then may hinder the workman, and cause the workman who falls certain distance that before being caught, drops by rope.Thereby, not limiting the workman atop under the situation of the mobility in face zone, need reduce the slackness of rope as far as possible.
Summary of the invention
So, the objective of the invention is to improve the safety of elevator.
Another object of the present invention is the protection that improves for the maintenance man of working on the elevator car top.
The invention provides a kind of elevator system, comprising: an elevator car; With the fender guard that carries out the workman of maintenance work on the elevator car top that is used to protect in hoistway, this device comprises: a pillar that is installed on elevator car, and wherein said pillar can move between a vertical position and a lowering position; With a sleeve pipe that is installed on the car roof, slidably described pillar is remained in vertical position.
These and other objects of the present invention are to realize by a device that the workman who carries out maintenance work above the lift ram in being installed in hoistway is carried out protection.At elevator car bar, cylinder or other pillar are installed, this cylinder preferably can be positioned the distance in car upper vertical extent one regulation.
The feature of one embodiment of the present of invention is to keep enough head rooms for the workman who is positioned on the elevator car top.
A preferred feature of embodiments of the invention is to make the control circuit system of the inspection box of elevator prevent that workman on the lift ram is trapped in before safety method between the structure on car and hoistway top carried out, can not carry out the upwards function of operation.
These and other objects of the present invention are achieved in such an embodiment, and an elevator system comprises a driver train that breaks away under predetermined load in this embodiment.The clamp load that this pillar can bear is higher than the disengaging load of driver train, and when the car of upward movement made this pillar rise to the top structure that touches hoistway and reaches this disengaging load, driver train will break away from.
In another embodiment, the safety that the workman the wore eminence position that can be fixed on bar or pillar with a tight waist with a rope.Preferably leave enough slacknesses to rope and make workman's face activity atop freely, simultaneously rope being short to as far as possible is enough to limit the distance of falling when the workman crashes into hoistway accidentally above pushing up.
Description of drawings
Read following detailed description in conjunction with the accompanying drawings as a reference, can understand these and other objects of the present invention and feature better, wherein:
Fig. 1 is for showing the transparent view according to a traction drive elevators system of instruction of the present invention;
The front elevation that Fig. 2 amplifies according to the part of an embodiment of safety device of the present invention for description; And
Fig. 3 is the view of the description of similar Fig. 2 according to another embodiment of the present invention.
The specific embodiment
Fig. 1 at first, a traction drive elevators enerally designated parameter 10 as described herein has been showed the instruction of a preferred embodiment of the invention.Although the present invention launches to illustrate with particular reference to a traction drive elevators system, can find out obviously that from following public content the present invention also can cooperate the elevator system of any kind to use.System 10 comprises that one has the structure of knowing in the industry and is supported on elevator car 12 in the raising legs 13.The curb girder 14 of this raising legs includes guiding mechanism, and roller 15 is installed on this guiding mechanism, along sliding in the vertically extending relative guide rail (not shown) of hoistway length direction.
This raising legs comprises a crossbeam 17, and on even keel strides across between the curb girder that car top is set up in raising legs.Lifting hawser 18 is connected in this crossbeam and this hawser passes drive pulley 20 and the deflection pulley 21 that is fixed on close hoistway top 23 in the hoistway.The other end that promotes hawser is fixed on the counter weight device 25 of a similar car raising legs, and this counter weight device slides along vertically disposed guide rail (not shown) in hoistway.Terminology used here " hawser " is meant any proper flexibility cable or traction belt that promotes the elevator in the hoistway that be applicable to known in the industry and that use.
The motion of car is to obtain by the friction force that promotes between hawser and the traction drive pulley 20.The end that the lifting hawser passes drive pulley and each root hawser all is fixed on the counter weight device.Thereby hawser promotes elevator car in the tension of the both sides of drive pulley to produce necessary driving friction force.Can see that counter weight device guarantees to produce enough tractive forces in a side of pulley.The weight of car provides required reverse tractive force.An intrinsic safety performance is if the difference of the tractive force on the hawser surpasses a prescribed limit value then loses traction.
Be equipped with an inspection box 30 on the crossbeam 17 of raising legs.The controller of this inspection box and car is connected and can makes way for mechanist 32 on the car roof from the operation of compartment top control car.This inspection box allows the mechanist to move this elevator with very low speed when the operation of the various parts of checking elevator system.Thereby, also exist such possibility at present, if inspection box is malfunctioning or safety device overload, car crosses that top layer parking place approaches or touch the structure of well headroom and the workman also is positioned on the car roof.What it should further be appreciated that is the more and more equipments top that is installed in hoistway saving the space, thereby has further reduced the clear space of car upper.
With reference to figure 2, present embodiment is provided with a square hollow sleeve 40 again, and this sleeve pipe is vertical or vertical position is soldered or be connected on the crossbeam 17.This sleeve pipe comprises a pair of relative sidewall 41 and a pair of relative end wall 42.As shown in Figure 1, the aspect ratio end walls height of sidewall extension has formed a breach with the top at sleeve pipe.The trunnion 44 of a horizontal arrangement extends through gap regions and is fixed on the top of each sidewall.A long square hollow cylinder 47 is assemblied on this trunnion rotationally.In this device, this trunnion is arranged to be passed in the relative long slot bore 50 that forms on the sidewall 48 of cylinder, so that the lowering position of this cylinder shown in can the fictitious outline in Fig. 2 rotates between the upright position of axially aligning sleeve pipe.This cylinder can be slidably received within the sleeve pipe when being positioned over vertical, upright position.The size of adjusting this cylinder and sleeve pipe makes the sidewall of cylinder obtain the close clearance bearing fit in sleeve pipe.The axial length long enough of slotted eye 50 makes cylinder can arrive the bottom of sleeve pipe.Preferably, the axial length of cylinder enough extends up to when erectting at least a little more than a shoulder height that stands in the workman of the average height on the car roof (about 5 feet (about 1.5 meters) or higher), and preferably stands in the height of the workman on the car roof a little more than great majority.When not carrying out maintenance work on car, this cylinder can move to out of the way lowering position.
The size of adjusting this cylinder and sleeve pipe makes the cylinder of setting can bear certain clamp load and not produce bending, and this clamp load is much larger than the slip load of bont, just the hawser load of sliding on drive pulley.Under the sort of situation, when maintenance man is positioned on the car roof near the top structure of hoistway when car, rises the cylinder that comes and to strike top structure and block the car upward movement.The load of car one side will surpass (load) point that hawser slides with respect to drive pulley rapidly, thereby makes hawser or driver train (not shown) avoid continuing excessive pressure.
In sleeve bottom is inserted into the scope that cylinder enclosed of sleeve bottom, a sensitive switch 57 can be installed.This switch can link to each other with the circuit of inspection box and be configured to prevent the operation inspection case upwards (or both direction up and down, if necessary) operation is till this cylinder is inserted in the sleeve pipe fully.This switch can also be used to when cylinder rises, if when particularly this cylinder also can be promoted in the structure of head in normal car operation, blocks normal elevator operation.
With reference to Fig. 3, show an alternative embodiment of the invention.Here, cylinder is an I-shape bar 60, is connected on the opposing substrates 61, and this substrate 61 passes through welding, bolt, and the mode that screw is fixed or other is suitable is fixed on the crossbeam 17.This I-shape bar preferably is connected with substrate by a hinge 62, and cylinder can be rotated between the level attitude of as shown in the figure upright position and storage.A bolt mechanism 65 can be used for this cylinder is fixed on vertical position.This bolt mechanism can comprise a hasp 66, when bar is placed in vertical position, this hasp is enclosed within on the clevis eye that is fixed on the substrate.Latch 68 pass U annular 67 with this rod lock at vertical position.
In this embodiment, the I-shape bar 60 preferably made of this cylinder by steel.The same with previous embodiment, other shape and materials that are fit to also can adopt.
A switch 69 can be installed on crossbeam 17, when cylinder is placed on storage location, produce induction.This switch can be connected in the inspection box control circuit and play the control of blocking-up up (perhaps up-downgoing) function when cylinder is placed on storage location, and/or the not normal running when storage location of blocking-up cylinder.
The Fig. 2 that leaies through again, shown cylinder is inserted in the sleeve pipe with vertical or vertical position.A kind of safety with a tight waist 70 of being dressed by the workman of aloft work is connected the eminence of cylinder with a hawser 73.An eyebolt 74 is set at the position that needs on the cylinder and captives joint with this cylinder by nut 75.The far-end of hawser can be connected on the eyebolt 74.Although only show a single eyebolt among this embodiment of the present invention, the any suitable connecting device of knowing in the industry and using (for example, eyelet near the cylinder edge for instance, perhaps clevis bolt, shackle or clevis eye) also can be used for hawser is connected cylinder top.In addition, also can cooperate the workman of different heights that a plurality of point of connection are set.Clearly for the those skilled in the art in present technique field, also can adopt a kind of whole body safety with a tight waist and without departing the teaching of the invention.
In practice, the present invention preferably adopts a length to be approximately the cylinder of 5 to 6 feet (about 1.5 to 1.8 meters).When cylinder was erected in the sleeve pipe, the far-end of hawser was positioned at the height of the average shoulder height that is slightly higher than the workman.The length of hawser makes hawser tie up to eminence to allow the workman can be freely move on car roof, and if the workman crashes into above pushing up and the road has only seldom (hawser) slackness.
What should be noted that is that this cylinder both can be used as one and stoped car to the too much pillar of well headroom operation, also be the safety point of connection that eminence is provided with a tight waist, or both had both at the same time.If cylinder just is used to provide the point of connection of eminence; the intensity of cylinder and casing bit does not just need to reach the degree that can block the car upward movement so; but must be able to bear the workman's that gets off of falling anticipated load; and the regulations that its size preferably meets the structural strength of the fixedly mooring point that falls about protection require (for example, existing OSHA regulation require to bear 5000 pounds (1866.2 kilograms) static weight).
Though the present invention is showed with particular reference to the preferred form shown in the figure and is described, the those skilled in the art in present technique field are understandable that, can do various changes aspect the details under not deviating from by the prerequisite of the determined scope of the present invention of claim.For example, pointed out that the design variation of cylinder can comprise the variation of cross sectional shape (tubular construction, open section bar etc.).In addition, also can adopt the fixing means of another kind of crossbeam.The another kind of selection is that this cylinder also can be installed in other positions of raising legs.Also a touch panel (not shown) can be set in the position that the well headroom cylinder will impact, perhaps absorb with a springing that cylinder touches and the initial impact load during the road top structure.Because check speed limit at 0.75m/s or less than every A17 number in the U.S., if use in the U.S., the impact of energy accumulation device will only be required to be about 65mm.In addition, the corbeling that other is vertical as A shape frame or similar, also can be used for replacing a vertical cylinder.
Theme of the present invention is normally discussed in the traction drive elevators system by maintenance of sedan-chair jacking row and/or inspection contextual.Yet, should be noted that theme of the present invention can be applied in the other system, for example, for instance, a kind of hydraulic elevator system that on main jigger lifting piston, is provided with reducing valve.In this system, a supporting mechanism can bear the motion that enough clamp loads trigger this reducing valve and block car.Though be most commonly used in the lower elevator system of head room, if enough head rooms are arranged in elevator system, this cylinder also can move on to lowering position so.
Claims (17)
1. elevator system comprises:
An elevator car; With
Carry out the workman's of maintenance work fender guard on the elevator car top that is used to protect in hoistway, this device comprises:
A pillar that is installed on elevator car, wherein said pillar can move between a vertical position and a lowering position; With
A sleeve pipe that is installed on the car roof remains in vertical position with described pillar slidably.
2. system according to claim 1, it is characterized in that, also comprise a car driver train that under predetermined load, breaks away from, the described pillar that wherein is in described vertical position can bear the clamp load greater than this predetermined load, when the elevator car of upward movement moved the described pillar that is in described vertical position and head structure in the hoistway contacts, this pillar stoped the further upward movement of elevator car that driver train is broken away from.
3. elevator system according to claim 2, it is characterized in that, described driver train comprises lifting hawser and hauling block that is used to engage and drive described hawser of a suspention elevator car, and wherein said hawser slides on described pulley under default load.
4. elevator system according to claim 1 is characterized in that, described pillar is a column structure.
5. elevator system according to claim 1 is characterized in that described sleeve pipe is vertically disposed.
6. elevator system according to claim 1 is characterized in that, described car is fixed on one movably in the raising legs, and this raising legs has a crossbeam that is arranged on the car top, and described sleeve pipe is fixed on this crossbeam.
7. elevator system according to claim 1 is characterized in that, described sleeve pipe is to have the relative sidewall and the rectangular tube of end wall with described pillar.
8. elevator system according to claim 7 is characterized in that, the relative described sidewall of described sleeve pipe extends upward and surpasses relative described end wall, forms two relative breach with the top at described sleeve pipe.
9. elevator system according to claim 8, it is characterized in that, also comprise one be horizontally placed on described sleeve pipe sidewall extend upward the part between trunnion, described trunnion passes in the long slot bore that forms on the column side wall, described slotted eye extends axially along the cylinder hypomere, and wherein this cylinder can vertically be raised up and can rotate to the storage location of a level in described sleeve pipe.
10. elevator system according to claim 1 is characterized in that, also comprises:
An inspection box that is fixed on the elevator car top comprises the circuit arrangement of during checking controlling elevator car in this inspection box; With
A switch that is triggered when described pillar remains on vertical position by described sleeve pipe, described switch make described circuit arrangement only just allow the car during checking can upward movement when described pillar is in vertical position.
11. elevator system according to claim 10 is characterized in that, described switch is blocked normal elevator operation when described pillar is in vertical position.
12. elevator system according to claim 1 is characterized in that, also comprises the hinge means that described pillar is rotated between vertical position and lowering position.
13. elevator system according to claim 1 is characterized in that, also comprises a bolt mechanism that described pillar is locked in vertical position.
14. elevator system according to claim 1 is characterized in that, comprises that also is located at a connecting device that is used for when described pillar is in vertical position hawser removably being connected in described pillar on the described pillar.
15. elevator system according to claim 14 is characterized in that, described connecting device removably is fixed on the topmost when described pillar is in vertical position of described pillar.
16. elevator system according to claim 14 is characterized in that, described connecting device is the position that is positioned on the car roof at least about 5 feet (being approximately 1.5 meters) when described support is in vertical position.
17. elevator system according to claim 1 is characterized in that, described support is gone up the distance of extending at least about 5 feet (about 1.5 meters) to the elevator car top when being in vertical position.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/940,119 | 2001-08-27 | ||
| US09/940,118 US6481537B1 (en) | 2001-08-27 | 2001-08-27 | Rooftop safety apparatus for elevator servicing |
| US09/940,119 US6481534B1 (en) | 2001-08-27 | 2001-08-27 | Apparatus for maintaining adequate overhead space for car top mechanics in elevator systems |
| US09/940,118 | 2001-08-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1547549A CN1547549A (en) | 2004-11-17 |
| CN1315712C true CN1315712C (en) | 2007-05-16 |
Family
ID=27130129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028167120A Expired - Fee Related CN1315712C (en) | 2001-08-27 | 2002-08-20 | Safety apparatus for maintenance of elevator systems from top of the car |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4276941B2 (en) |
| CN (1) | CN1315712C (en) |
| DE (1) | DE10297157T5 (en) |
| WO (1) | WO2003018459A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108217392A (en) * | 2018-01-26 | 2018-06-29 | 苏州沃诺斯精密机械有限公司 | A kind of car for being equipped with erosion control fore-set |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004053854B4 (en) * | 2003-11-05 | 2014-03-27 | Bornack Gmbh & Co. Kg | fuse assembly |
| CN101068742B (en) * | 2004-11-30 | 2010-12-22 | 奥蒂斯电梯公司 | Elevator car with fold-away shock absorbing legs, and the corresponding elevator |
| CN101031494B (en) * | 2005-09-16 | 2010-08-25 | 三菱电机株式会社 | Car upper handrail device of elevator |
| JP5081751B2 (en) * | 2008-07-15 | 2012-11-28 | 株式会社日立製作所 | Elevator maintenance safety device |
| ES2349514B1 (en) * | 2008-07-30 | 2011-11-29 | Orona, S. Coop. | LIFTING DEVICE |
| WO2013095408A1 (en) * | 2011-12-21 | 2013-06-27 | Otis Elevator Company | Elevator system including a car stop for maintaining overhead clearance |
| CN104326331A (en) * | 2014-10-29 | 2015-02-04 | 康力电梯股份有限公司 | Safety maintenance device of upper beam of elevator |
| US20220362593A1 (en) * | 2019-11-21 | 2022-11-17 | 3M Innovative Properties Company | Fall protection system |
| WO2021099876A1 (en) * | 2019-11-21 | 2021-05-27 | 3M Innovative Properties Company | Fall protection system |
| JP2023502459A (en) | 2019-11-21 | 2023-01-24 | スリーエム イノベイティブ プロパティズ カンパニー | Fall prevention system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0958942A (en) * | 1995-08-22 | 1997-03-04 | Mitsubishi Denki Bill Techno Service Kk | Space keeping device of elevator |
| WO1999047447A1 (en) * | 1998-03-18 | 1999-09-23 | Kone Corporation | Safety device for an elevator |
| CN1246437A (en) * | 1998-09-03 | 2000-03-08 | 株式会社东芝 | Elevator with adjustable top-side enclosure component |
| US6138798A (en) * | 1995-12-22 | 2000-10-31 | Macuga; Henry J. | Elevator safety system incorporating false pit |
| FR2795060A1 (en) * | 1999-06-17 | 2000-12-22 | Gilles Antras | Lift stop for maintenance in shaft has retractable stop on lift cabin engaging stop on wall of lift shaft to selectively prevent total upward movement of cabin |
-
2002
- 2002-08-20 WO PCT/US2002/026656 patent/WO2003018459A1/en active Application Filing
- 2002-08-20 DE DE10297157T patent/DE10297157T5/en not_active Ceased
- 2002-08-20 JP JP2003523132A patent/JP4276941B2/en not_active Expired - Fee Related
- 2002-08-20 CN CNB028167120A patent/CN1315712C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0958942A (en) * | 1995-08-22 | 1997-03-04 | Mitsubishi Denki Bill Techno Service Kk | Space keeping device of elevator |
| US6138798A (en) * | 1995-12-22 | 2000-10-31 | Macuga; Henry J. | Elevator safety system incorporating false pit |
| WO1999047447A1 (en) * | 1998-03-18 | 1999-09-23 | Kone Corporation | Safety device for an elevator |
| CN1246437A (en) * | 1998-09-03 | 2000-03-08 | 株式会社东芝 | Elevator with adjustable top-side enclosure component |
| FR2795060A1 (en) * | 1999-06-17 | 2000-12-22 | Gilles Antras | Lift stop for maintenance in shaft has retractable stop on lift cabin engaging stop on wall of lift shaft to selectively prevent total upward movement of cabin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108217392A (en) * | 2018-01-26 | 2018-06-29 | 苏州沃诺斯精密机械有限公司 | A kind of car for being equipped with erosion control fore-set |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10297157T5 (en) | 2004-07-22 |
| JP2005500962A (en) | 2005-01-13 |
| JP4276941B2 (en) | 2009-06-10 |
| CN1547549A (en) | 2004-11-17 |
| WO2003018459A1 (en) | 2003-03-06 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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