CN1314575C - Controller for elevator - Google Patents
Controller for elevator Download PDFInfo
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- CN1314575C CN1314575C CNB031009875A CN03100987A CN1314575C CN 1314575 C CN1314575 C CN 1314575C CN B031009875 A CNB031009875 A CN B031009875A CN 03100987 A CN03100987 A CN 03100987A CN 1314575 C CN1314575 C CN 1314575C
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Abstract
Provided is an elevator control device for speed reducing control at a terminal floor, wherein overspeed is highly accurately set corresponding to the distance from a car terminal. The control device comprises a position detector (60) for detecting the distance from the upper or lower terminal of an elevator shaft to the car, a speed detector (60) for detecting the speed of the car, an overspeed detecting means for detecting the overspeed of the car from an overspeed level, and a reducing/stopping means for forcibly reducing the speed of and stopping the car if the travelling speed of the car reaches the overspeed level or higher determined by the overspeed detecting means corresponding to the distance from the terminal when the car approaches the terminal of the shaft. In the control device, the position detector (60) continuously detects the distance from the terminal and the overspeed detecting means continuously varies the overspeed level corresponding to the distance from the terminal.
Description
Technical field
The present invention relates to elevator control device, relate in particular to the elevator control device of forcibly elevator being slowed down and stopping to control in the terminal stage.
Background technology
Be arranged on the energy disperser in the melt pit of elevator, when colliding with energy disperser at full tilt, also the stroke that can enough cushion must be arranged because of failure and other reasons car or counterweight.The trip, correspondingly elongated when command speed increases, also must correspondingly deepen melt pit.But when command speed is high to a certain degree the time, the desired depth of melt pit can become unpractical numerical value.Therefore, the depth ratio that in fact is provided with is original needed shallow.
In this elevator control device in the past, a plurality of operating points are being set when terminal is before the stage, in the moment that the position detecting switch of cage side goes out the Cam Detection of the hoist trunk side of each operating point, the overspeed detection level is confirmed (for example, with reference to patent documentation 1: Japanese patent laid-open 11-246141 communique)
In described such elevator control device, owing to hypervelocity is detected with mechanical switch, so number of stages is restricted, can not can not slow down forcibly to the abnormal speed high Precision Detection of car hypervelocity and in the terminal stage stops, and thick and exist for being suppressed to limits value towards the collision speed of energy disperser that must in advance braking torque be made will very big problem than usually because of the hypervelocity level.
Summary of the invention
The present invention makes in order to address the above problem, and its purpose is, provides and the corresponding elevator control device of hypervelocity being carried out the terminal stage deceleration control of high precision setting of the distance from car to terminal.
In view of described purpose, the invention provides a kind of elevator control device, have: detect position detecting device from the terminal up and down of elevator lifting channel to the distance of car; Detect the speed detector of car speed; Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity; At car during near the terminal of hoist trunk, when the running velocity of car reach determined by described overspeed testing apparatus, with the speed reduction stop apparatus that when the corresponding hypervelocity level of the distance of terminal is above, forcibly makes car slow down and stop, in the control of terminal stage deceleration, described position detecting device detects car continuously to the distance of terminal, and described overspeed testing apparatus changes the hypervelocity level accordingly continuously with distance from described terminal.
Another elevator control device of the present invention has: detect the position detecting device from the terminal up and down of elevator lifting channel to the distance of car; Detect the speed detector of car speed; Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity; At car during near the terminal of hoist trunk, when the running velocity of car reaches determined by described overspeed testing apparatus, with when the corresponding hypervelocity level of the distance of terminal is above, the speed reduction stop apparatus that forcibly makes car slow down and stop, in the control of terminal stage deceleration, described position detecting device detects the distance that car leaves terminal discretely, also have the detected distance of this discreteness is carried out linear interpolation and obtained the linear interpolation device of distance continuously, and described overspeed testing apparatus changes the hypervelocity level accordingly continuously with distance through linear interpolation.
Another elevator control device of the present invention has: the speed control unit of control elevator car speed;
The speed instruction device that the speed of this elevator is indicated; The position detecting device of detection from the terminal up and down of elevator lifting channel to the distance of car; Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity; At car during near the terminal of hoist trunk, when the running velocity of car reach determined by described overspeed testing apparatus, with the speed reduction stop apparatus that when the corresponding hypervelocity level of the distance of terminal is above, forcibly makes car slow down and stop; Adjusting indicator signal according to command speed makes the command speed of lift car can fade to the command speed variset of the above speed of collision speed of energy disperser.
Description of drawings
Fig. 1 is the cutaway view of hoist trunk with elevator control device of an example of the present invention.
Fig. 2 is the functional block diagram of the structure of the terminal stage deceleration control part that constituted in the computing machine that is illustrated in the control panel of Fig. 1.
Fig. 3 is the action diagram that is used to illustrate elevator control device of the present invention.
Fig. 4 is the action diagram that is used to illustrate elevator control device of the present invention.
Fig. 5 is the cutaway view of hoist trunk with elevator control device of another example of the present invention.
Fig. 6 is the functional block diagram of the structure of the interior interior terminal stage deceleration control part that is constituted of computing machine of the control panel of presentation graphs 5.
Fig. 7 is the constructional drawing that is used for the discrete position detecting device of instruction diagram 5.
Fig. 8 is the constructional drawing that is used for the discrete position detecting device of instruction diagram 5.
Fig. 9 is the constructional drawing that is used for the discrete position detecting device of instruction diagram 5.
Figure 10 is the functional block diagram of the structure of the control part that constituted in the computing machine in the control panel that is illustrated in the elevator control device of another example of the present invention.
Figure 11 is the action diagram that is used to illustrate elevator control device of the present invention.
Figure 12 is the action diagram that is used to illustrate elevator control device of the present invention.
The specific embodiment
[example 1]
Fig. 1 is the cutaway view of hoist trunk with elevator control device of an example of the present invention.Elevator is made of Machine Room 1, hoist trunk 2 and the melt pit 3 that is located at hoist trunk 2 bottoms basically, is located at each equipment on them with control panel 5 controls.On hanging over, be connected car 7 and counterweight 8 respectively by both sides from the main rope 9 on the control signal 5a of control panel 5 and the winch 6 that speed-slackening signal 5b is controlled.In addition, have and be connected with the both sides of car 7 and be provided with speed detector 11 and the mobile volume detector 61 that constitutes by each rotary encoder that produces speed detection signal 11a and amount of movement detection signal 61a etc. with the governor 10 that straining pulley 13 gives the governor rope 12 of tension force.
On melt pit 3, has the energy disperser 14,15 that relaxes car 7 and counterweight 8 collisions respectively.Position and speed detecting device 60 comprises test section 60a, 60b, the 60c that is located on car 7 and the hoist trunk 2, produce laser, sound wave, electric wave and light etc. and receive backward wave as detecting medium, or utilize the Doppler effect of this moment and directly detect the distance (position of car) of terminal and the speed of car up and down left of car.This just makes the device that is made of position detecting device and speed detector.The test section 60a that is located on the car 7 supplies with detection signal 66a (signal that comprises distance and speed) to control panel 5.Fig. 2 is illustrated in the interior terminal stage deceleration control part 500 that is constituted of computing machine in the control panel 5.Terminal stage deceleration control part 500 has overspeed testing apparatus 502 and the speed reduction stop apparatus 504 in this example.Overspeed testing apparatus 502 in the ordinary course of things, show when above and detected hypervelocity when the speed of car reaches the hypervelocity level, and change the hypervelocity level to car accordingly continuously from the distance of terminal with detection signal 66a institute continuous detecting from position and speed detecting device 60 goes out.Speed reduction stop apparatus 504 reaches 502 determined with described overspeed testing apparatus, when above, car slowed down stop to the corresponding hypervelocity level of distance of terminal with car in car speed.In addition, the speed signal as car also can replace the speed in the position and speed detecting device 60 to detect by operating speed detection signal 11a.
Fig. 3 be with transverse axis as the speed (representing) of time representation detected elevator along with the operation of elevator with A, continuously detected elevator the distance from car to terminal (representing) with B, the distance from car to terminal (representing with C) and the terminal stage deceleration control setup of detected elevator detect hypervelocity and drg is worked and can slow down into the figure that allows the overspeed detection level (representing with D) below the collision speed of energy disperser 14,15 discretely.Fig. 4 be with the distance from car to terminal get as transverse axis represent with respect to distance common retardation curve (representing) with E, with respect to continuous detecting go out from car to terminal apart from the time distance overspeed detection level (representing) with F, with respect to discreteness detect from car to terminal apart from the time distance the figure of overspeed detection level (representing) with G.
Terminal stage forced deceleration control in this example utilizes position detecting device to detect distance from car to terminal continuously.Detected distance to terminal is sent to the terminal stage deceleration control part 500 of control panel 5, in terminal stage deceleration control part 500, utilize overspeed testing apparatus 502, the car that goes out with detection signal 66a institute continuous detecting from position and speed detecting device 60 changes the hypervelocity level accordingly continuously to the distance of terminal.That is to say,, set the forced deceleration pattern that car was underspeeded before colliding with energy disperser 14,15 for elevator than the maximum rated fast command speed of energy disperser 14,15.Speed reduction stop apparatus 504 makes drg (not shown) action of winch 6, reaches corresponding to the distance of terminal with car,, car is slowed down stop when above with overspeed testing apparatus 502 determined hypervelocity levels in the speed of car.Overspeed testing apparatus 502, limits the hypervelocity level as the limit with the maxim of overspeed detection level, and this maxim changes according to command speed.
As mentioned above, in this example, by set for than the elevator of the maximum rated fast command speed of energy disperser in the forced deceleration pattern that car speed is reduced before collide with energy disperser, because to the work of carrying out with the level in a plurality of stages of in the past minority, by using with laser, sound wave, the position detecting device that electric wave and light etc. use as the detection medium is set and is made successive value, so can will make the car speed of drg action make lowest possible value, and can set hypervelocity accordingly accurately with distance from car to terminal.
[example 2]
Fig. 5 is the cutaway view of hoist trunk with elevator control device of another example of the present invention.Identical with described example or cooresponding part is with identical symbolic representation.Fig. 5 be not the position and speed detecting device 60 of Fig. 1 but have by detect from car to terminal plate group 104～108 distance, that be arranged on hoist trunk 2 sides and by these plate groups carry out position probing, comprise a plurality of position detection parts of being located at car 7 sides (discrete position detecting device 122 of the car position that detects elevator discretely that constitutes with reference to the position detecting device 102 of the 103a of Fig. 7～9～f).In addition, distance detection device 110 will be carried out integration, calculate range ability and be exported range ability signal 110a by speed detector 11 detected speed detection signal 11a.
In addition, Fig. 6 represents the functional structure of the terminal stage deceleration control part 500 that is made of the computing machine in the control panel in this example 5.Terminal stage deceleration control part 500 has overspeed testing apparatus 502a, speed reduction stop apparatus 504a and the linear interpolation device 111 that utilizes in this example.The range ability signal 110a of linear interpolation device 111 usefulness distance detection device 110 carries out linear interpolation to the detected distance from car to terminal of discreteness.It is corresponding and the operating point of a plurality of detections hypervelocities and corresponding and make the hypervelocity level variable discretely with the distance of car terminal is set that overspeed testing apparatus 502a and the detected car of discreteness that detection signal 102a from discrete position detecting device 122 produces leave the distance of terminal, and here, utilize linear interpolation device 111, change the hypervelocity level accordingly continuously with the distance of passing through linear interpolation.Speed reduction stop apparatus 504a reaches determined with overspeed testing apparatus 502a,, car is slowed down stop when above with the corresponding hypervelocity level of distance from car to terminal in the speed of car.The relation of the plate group 104a～108c of the position detecting device 122 that Fig. 7～9 expressions are discrete and the position detection part 103a～f of position detecting device 102 is represented single-piece front view, the birds-eye view that is in bonding state and front view separately respectively.Represented 5 operating point among the figure, but this to count can be arbitrarily, the number of the position detection part 103 of changeable position detecting device 102 corresponding and plate group 104a～108c with it.
Among Fig. 7, the car 7 of elevator is along hoist trunk 2 liftings.Has identical length with being darted at the arm 109e that arm 109a～109e on the horizontal direction makes from the arm 109a of below to the top.Plate 104a～104c, 105a～105c, 106a～106c, 107a～107c, 108a～108c, paper vertically is installed on each arm 109a～109e relatively respectively, and each operating point is encoded.Though the position detection part 103a～103f of position detecting device 102 is the members that utilize magnetic action, also it can be made laser, sound wave, electric wave, light etc. as the member that detects medium.Position detection part 103a～103f such as Fig. 8 and shown in Figure 9, plate group 104a～108c is sandwiched (slide insert) at each operating point in being shaped as コ font recess the time, because of magnetic shield is failure to actuate, they produce as detection signal 102a, from becoming the combination of this position detection part 103a～103f that is failure to actuate, detect situation about arriving to each operating point with terminal stage deceleration control part shown in Figure 6 500.
Among Fig. 3 expression along with the speed A of the detected elevator of the operation of the car 7 of elevator, discretely detected car from elevator to the distance C of terminal, Fig. 4 expression relatively the distance from car to terminal common retardation curve E, expression with respect to detect discretely from car to terminal apart from the time the terminal stage forced deceleration control of the horizontal G of overspeed detection, this example of distance utilize discrete position detecting device 122 to detect distance discretely from car to terminal.In addition, to utilizing speed detector 11 detected speed to carry out integration, and utilize the distance detection device 110 calculate range ability to detect range ability, utilize linear interpolation device 111 (with reference to Fig. 6) detected distance from car to terminal discretely to be carried out linear interpolation by range ability.In this linear interpolation, will be when detecting the position from the distance of terminal as reference range, after, for example utilize the range ability of institute's computing on the basis of the speed data that is obtained by speed detection signal 11a, deduct described distance from terminal as car position.
Overspeed testing apparatus 502a goes out hypervelocity according to the distance detecting to terminal of linear interpolation, continuous interpolation, speed reduction stop apparatus 504a works as the drg (not shown) of winch 6, and the overspeed detection level that can slow down (with reference to the D of Fig. 3) becomes allowing below the collision speed of energy disperser 14,15 continuously.The overspeed detection level limits the hypervelocity level as the limit by the maxim of overspeed detection level with overspeed testing apparatus 502a, and is variable according to this maxim of command speed.
As mentioned above in this example, detect the discrete position detecting device of the car position of elevator discretely, linear interpolation obtains continuous distance and make corresponding with the distance of linear interpolation makes the hypervelocity level variable continuously owing to this detected discretely distance of doing to be obtained with the linear interpolation device is in pairs carried out, so similarly can make the car speed of drg action make lowest possible value, can correspondingly with distance set hypervelocity accurately from car to terminal.
[example 3]
Figure 10 represents the functional structure of the control part 600 that is made of the computing machines in the control panel in the elevator control device of another example of the present invention 5.The integral structure of elevator also can be any among Fig. 1, Fig. 5.In Figure 10, speed control unit 602, signal according to the speed instruction device of the formations such as distance detection device 110 of the speed detector 11 of Fig. 1, Fig. 5 of coming free indicating elevator speed and mobile volume detector 61, Fig. 5 is exported control signal 5a and speed-slackening signal 5b, and controls the speed control of the common lift car of winch 6.The speed of 604 pairs of cars of overspeed testing apparatus and hypervelocity level compare and detect the hypervelocity of car.Speed reduction stop apparatus 606 is at car during near the terminal of hoist trunk,, reach 604 determined, when above, car slowed down stop when the running velocity of car with the corresponding hypervelocity level of distance of leaving terminal by overspeed testing apparatus.Command speed variset 608 is adjusted indicator signal 300 according to command speed described later makes the command speed of lift car can fade to speed more than the collision speed of energy disperser.In addition, as the position detecting device that detects from the terminal up and down of elevator lifting channel to the distance of car, also can be the position and speed detecting device 60 of Fig. 1, Fig. 5, discrete position detecting device 122 or the device of other patterns.
Command speed is adjusted indicator signal 300, is that (for example, the occasion that the car internal loading is light is with high command speed mode operation according to the car internal loading; And in heavy occasion, capable with low command speed mode operation), or the starting frequency of work-hours band occasion how etc., (for example, the high occasion of starting frequency is with high command speed mode operation according to the starting frequency; And in few occasion, with low command speed mode operation) signal, or passenger's signal that (not shown) obtained when waiting from the outside with pushing button, switch etc. is the signal that is used to indicate command speed rising or decline.The high command speed pattern of expression among (a) of Figure 11, (b) in the high command speed hypervelocity of expression pattern, (c) in the low command speed pattern of expression, (d) in the low command speed hypervelocity of expression pattern.Here, command speed makes 2 high and low stages, but this number of stages also can be several.The indication that command speed variset 608 is adjusted indicator signal 300 according to command speed makes command speed variable.Overspeed testing apparatus 604 limits as the limit maxim of overspeed detection level to the hypervelocity level, this maxim is variable according to command speed.Horizontal C of overspeed detection and velocity mode D when horizontal A of overspeed detection when Figure 12 represents high command speed and velocity mode B, low command speed.Retardation curve when in addition, R represents to move usually.
As mentioned above in this example, because according to car internal loading state, starting frequency or from exterior instruction, make the command speed of lift car can fade to speed more than the collision speed of energy disperser, so make lowest possible value by the car speed that will make the drg action, elevator can be moved efficiently.
[example 4]
In utilizing the elevator control device of another example of the present invention, in the control part 600 that constitutes by the computing machine in the control panel 5 of Figure 10, overspeed testing apparatus 604 is by Fig. 1, the position and speed detecting device 60 of Fig. 5, during position detecting device et out of order that discrete position detecting device 122 grades constitute, the hypervelocity level is dropped to below the collision speed of energy disperser, and speed reduction stop apparatus 606 makes car speed drop to usefulness will be by Fig. 1, the speed detector 11 of Fig. 5 and mobile volume detector 61, the speed that the following hypervelocity level of collision speed of energy disperser of dropping to the rated speed of lift that speed instruction device that distance detection device 110 grades of Fig. 5 are constituted produces is limited.
In order to detect fault, be provided with position checking device 610.Position checking device 610, to utilizing by Fig. 1, the position and speed detecting device 60 of Fig. 5, the detected distance to terminal of position detecting device of the terminal stage deceleration control that discrete position detecting device 122 grades constitute is (with detection signal 66a, the 102a correspondence) compares with the present position (corresponding) of the car 7 of calculating by the mobile detection signal 61a that is contained in the mobile volume detector 61 in the speed instruction device with 61a, during poor more than producing specified value, judgement is by position and speed detecting device 60, the position detecting device that discrete position detecting device 122 grades constitute takes place unusual, and utilizes command speed variset 608 that the hypervelocity level in the overspeed testing apparatus 604 is dropped to below the collision speed of energy disperser.
As mentioned above in this example, occasion at the position detecting device et out of order, overspeed testing apparatus utilizes the command speed variset and the hypervelocity level is dropped to below the collision speed of energy disperser, and because speed reduction stop apparatus makes car speed drop to the speed that the following hypervelocity level of collision speed that command speed with the elevator that speed instruction device is produced drops to energy disperser is limited, so can guarantee safety.
In view of described purpose, elevator control device of the present invention has: detect the position detecting device from the terminal up and down of elevator lifting channel to the distance of car; Detect the speed detector of car speed; Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity; At car during near the terminal of hoist trunk, when the running velocity of car reaches determined by described overspeed testing apparatus, with when the corresponding hypervelocity level of the distance of terminal is above, the speed reduction stop apparatus that forcibly makes car slow down and stop, in the control of terminal stage deceleration, detect the distance of leaving terminal continuously by described position detecting device, and described overspeed testing apparatus changes the hypervelocity level accordingly continuously with the distance of leaving described terminal, will make the car speed of drg action make lowest possible value thereby can provide, corresponding and can set the elevator control device of hypervelocity accurately with car from the distance of terminal.
Claims (9)
1, a kind of elevator control device is characterized in that, has:
The position detecting device of detection from the terminal up and down of elevator lifting channel to the distance of car;
Detect the speed detector of car speed;
Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity;
At car during near the terminal of hoist trunk, when the running velocity of car reach determined by described overspeed testing apparatus, with the speed reduction stop apparatus that when the corresponding hypervelocity level of the distance of terminal is above, forcibly makes car slow down and stop,
In terminal stage deceleration control, described position detecting device detects the distance of car to terminal continuously, and described overspeed testing apparatus changes the hypervelocity level accordingly continuously with distance from described terminal.
2, elevator control device as claimed in claim 1, it is characterized in that, described position detecting device and speed detector comprise be located in car and the hoist trunk, with in laser, sound wave, electric wave, the light any as the shared test section that detects medium and directly the distance and the car speed of car and terminal detected.
3, a kind of elevator control device is characterized in that, has:
The position detecting device of detection from the terminal up and down of elevator lifting channel to the distance of car;
Detect the speed detector of car speed;
Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity;
At car during near the terminal of hoist trunk, when the running velocity of car reaches determined by described overspeed testing apparatus, with when the corresponding hypervelocity level of the distance of terminal is above, the speed reduction stop apparatus that forcibly makes car slow down and stop, in the control of terminal stage deceleration, described position detecting device detects the distance that car leaves terminal discretely, also have the detected distance of this discreteness is carried out linear interpolation and obtained the linear interpolation device of distance continuously, and described overspeed testing apparatus changes the hypervelocity level accordingly continuously with distance through linear interpolation.
4, elevator control device as claimed in claim 3 is characterized in that, described linear interpolation device uses the velocity product score value from described speed detector to carry out interpolation and obtain distance continuously between the distance of terminal to discreteness is detected.
5, a kind of elevator control device is characterized in that, has:
The speed control unit of control elevator car speed;
The speed instruction device that the speed of this elevator is indicated;
The position detecting device of detection from the terminal up and down of elevator lifting channel to the distance of car;
Overspeed testing apparatus by hypervelocity horizontal detection car hypervelocity;
At car during near the terminal of hoist trunk, when the running velocity of car reach determined by described overspeed testing apparatus, with the speed reduction stop apparatus that when the corresponding hypervelocity level of the distance of terminal is above, forcibly makes car slow down and stop; Adjusting indicator signal according to command speed makes the command speed of lift car can fade to the command speed variset of the above speed of collision speed of energy disperser.
6, elevator control device as claimed in claim 5, it is characterized in that, it is according to the starting frequency of car internal loading state, car and from any signal of exterior indication that described command speed is adjusted indicator signal, described command speed variset is adjusted indicator signal according to described command speed and command speed risen or decline.
7, elevator control device as claimed in claim 5 is characterized in that, described overspeed testing apparatus will exceed the speed limit horizontal constraints in maxim, and described maxim is variable according to command speed.
8, elevator control device as claimed in claim 5, it is characterized in that, occasion at described position detecting device et out of order, described overspeed testing apparatus is reduced to the hypervelocity level below the collision speed of energy disperser, and described speed reduction stop apparatus drops to the speed that the hypervelocity level below the collision speed that command speed by the elevator that described speed instruction device is produced drops to energy disperser is limited with the speed of car.
9, elevator control device as claimed in claim 8, it is characterized in that, also has position checking device, it checks the conformability of the 2nd position detecting device that described position detecting device and described speed instruction device have, and is taking place with regulation to be judged as fault when inconsistent and described command speed variset descends the hypervelocity level of described overspeed testing apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002288439A JP4335511B2 (en) | 2002-10-01 | 2002-10-01 | Elevator equipment |
| JP2002288439 | 2002-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1486918A CN1486918A (en) | 2004-04-07 |
| CN1314575C true CN1314575C (en) | 2007-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031009875A Expired - Lifetime CN1314575C (en) | 2002-10-01 | 2003-01-08 | Controller for elevator |
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| Country | Link |
|---|---|
| JP (1) | JP4335511B2 (en) |
| CN (1) | CN1314575C (en) |
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| KR101955788B1 (en) | 2017-02-22 | 2019-03-08 | 현대엘리베이터주식회사 | Multistage variable lift elevator |
| US11548759B2 (en) | 2017-06-27 | 2023-01-10 | Inventio Ag | Position determining system and method for determining a car position of an elevator car |
| CN107601244B (en) * | 2017-09-18 | 2019-04-16 | 枣庄矿业（集团）有限责任公司蒋庄煤矿 | The control method of friction type winder variable deceleration point based on variable load |
| CN109052096A (en) * | 2018-08-13 | 2018-12-21 | 华北理工大学 | A kind of anti-slip ladder device |
| CN110921446B (en) * | 2019-12-10 | 2022-04-12 | 佳格科技(浙江)股份有限公司 | Equipment attribute acquisition system |
| CN114455423B (en) * | 2022-03-24 | 2022-11-25 | 常熟理工学院 | Elevator safety tongs-overspeed governor aggregate unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05319726A (en) * | 1992-05-13 | 1993-12-03 | Mitsubishi Electric Corp | Terminal floor speed reducer for elevator |
| CN1079442A (en) * | 1992-06-04 | 1993-12-15 | 三菱电机株式会社 | Device for detection of position of car body |
| US5780786A (en) * | 1996-03-29 | 1998-07-14 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for use in an elevator |
| US5869794A (en) * | 1995-11-08 | 1999-02-09 | Inventio Ag | Method and device for increased safety in elevators |
| JPH11246141A (en) * | 1998-03-06 | 1999-09-14 | Mitsubishi Electric Corp | Terminal floor deceleration device for elevator |
-
2002
- 2002-10-01 JP JP2002288439A patent/JP4335511B2/en not_active Expired - Fee Related
-
2003
- 2003-01-08 CN CNB031009875A patent/CN1314575C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05319726A (en) * | 1992-05-13 | 1993-12-03 | Mitsubishi Electric Corp | Terminal floor speed reducer for elevator |
| CN1079442A (en) * | 1992-06-04 | 1993-12-15 | 三菱电机株式会社 | Device for detection of position of car body |
| US5869794A (en) * | 1995-11-08 | 1999-02-09 | Inventio Ag | Method and device for increased safety in elevators |
| US5780786A (en) * | 1996-03-29 | 1998-07-14 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for use in an elevator |
| JPH11246141A (en) * | 1998-03-06 | 1999-09-14 | Mitsubishi Electric Corp | Terminal floor deceleration device for elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4335511B2 (en) | 2009-09-30 |
| CN1486918A (en) | 2004-04-07 |
| JP2004123279A (en) | 2004-04-22 |
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