JP2012136349A - Hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic elevator provided with a movement sensor installed in a place other than the area between a car and a hoistway and detecting the car which is off from a landing position.SOLUTION: The hydraulic elevator 1 includes the car 2, a jack 32, a rope 33, a bracket 35, a detected part 51, and a detecting part 52. The car 2 moves along a first guide rail 21 inside the hoistway 101. The jack 32 extends when hydraulic oil L is supplied. The bracket 35 is fitted to an upper end of the jack 32, supports a sheave 34, and moves along a second guide rail 351. The detected part 51 is fitted to the second guide rail 351 near a holding position H1 where the bracket 35 stops in a manner of corresponding to the floor landing position P1 where the car 2 stops. The detecting part 52 fitted to the bracket 35 detects the detected part 51 at the holding position H1 corresponding to the floor landing position P1.

Description

  Embodiments of the present invention relate to a hydraulic elevator including a device that detects that a riding board has deviated from a landing position.

  The elevator is equipped with a landing detection device in order to correctly land the riding on each floor. The landing detection device includes a landing detector serving as a detection unit and a landing detection plate serving as a detected unit. In general, the landing detector is attached to the riding board, and the landing detection plate is attached to the inside of the hoistway in the vicinity of each floor where it is desired to stop the riding. The landing detection unit includes a transmission unit that emits a signal and a reception unit that receives the signal. The landing detection plate has a reflection unit, and reflects the signal output from the transmission unit to the reception unit. The landing detection device recognizes that the riding board is at the landing position when the signal output from the transmission unit is reflected by the reflection unit and detected by the reception unit.

  In addition, there is a landing detection device that is configured so that a transmission unit and a reception unit of the landing detection unit are opposed to each other, and a landing detection plate passes between the transmission unit and the reception unit. In this landing detection device, the rider is in the landing position because the signal output from the transmission unit is blocked by the landing detection plate and cannot be detected in the reception unit at the landing landing position. Recognize

Japanese Patent No. 4262819 JP 2001-247270 A

  By the way, as described above, the elevator detects that the riding is in the landing position by the landing detection device and opens the door device. The elevator must have a safety device that prevents the rider from inadvertently moving while the door device is open. This is not limited to rope elevators, and hydraulic elevators are no exception. Both the rope type elevator and the hydraulic type elevator are provided with a landing detection device. Based on the detection signal, the landing detection device also knows that the riding is out of the landing position. Therefore, at present, the detection signal of the landing detection device is used to stop the boarding emergency when the landing device is removed from the landing position without confirming whether the door device is closed.

  However, the landing detection device is a positioning device for landing the rider, and is not a dedicated safety device for prohibiting so-called “door-open running” in which the rider runs with the door device open. . When adding a device that detects the position of the ride as a dedicated safety device that prohibits door-opening travel to the hydraulic elevator, it is desirable to be able to attach it to an existing hydraulic elevator. However, there are already landing detection devices, various devices, and their wiring between the riding platform and the hoistway, and it is difficult to install them while avoiding their interference.

  Therefore, the present invention provides a hydraulic elevator that is installed in a place other than between the riding board and the hoistway and includes a movement sensing device that detects that the riding board has deviated from the landing position.

  The hydraulic elevator according to an embodiment includes a riding rod, a jack, a rope, a bracket, a detected portion, and a detecting portion. The riding board moves along the first guide rail in the hoistway. The jack extends when supplied with hydraulic oil. The rope has a fixed end and a moving end, the fixed end is fastened to the lower part of the hoistway, and the moving end is connected to the ride. The bracket is attached to the upper end of the jack, supports the sheave on which the rope is hung, and moves along the second guide rail. The detected portion is attached to the second guide rail in the vicinity of the holding position where the bracket stops corresponding to the landing position where the riding stops. The detection unit is attached to the bracket and detects the detected portion at the holding position corresponding to the landing position.

The side view which shows typically the hydraulic elevator of 1st Embodiment. The top view of the hydraulic elevator shown in FIG. The side view of the to-be-detected part and detection part of the hydraulic elevator shown in FIG. The side view which looked at the to-be-detected part and detection part which were shown in FIG. 3 from the sheave side. The side view from which the riding of the hydraulic elevator shown in FIG. 1 removed from the movement sensing apparatus. The side view which shows typically the hydraulic elevator of 2nd Embodiment. The top view of the hydraulic elevator shown in FIG. The side view which shows the to-be-detected part of the hydraulic elevator of 3rd Embodiment.

  The hydraulic elevator 1 according to the first embodiment will be described with reference to FIGS. 1 to 5. A hydraulic elevator 1 shown in FIG. 1 includes a riding rod 2, a hydraulic drive device 3, a landing detection device 4, a movement detection device 5, and a control unit 6. The carriage 2 is configured to move along the first guide rail 21 that is laid vertically in the hoistway 101. The riding board 2 includes a door device 22. The door device 22 is interlocked with the hold door 102 on the floor on which the norikura 2 has landed.

  The hydraulic drive device 3 includes a pump 31, a jack 32, a rope 33, a sheave 34, and a bracket 35. The pump 31 supplies hydraulic oil L. The jack 32 is installed at the bottom of the hoistway 101 and includes a cylinder 321 and a plunger 322. When the hydraulic oil L is supplied from the pump 31, the jack 32 pushes the plunger 322 upward from the cylinder 321 so as to extend in the vertical direction.

  The rope 33 has a fixed end 33A and a moving end 33B. The fixed end 33A is fastened to a hitch 331 attached to the lower part of the hoistway 101, that is, the lower part of the cylinder 321 in the first embodiment. The moving end 33 </ b> B is connected to a hitch 332 that protrudes from the bottom of the riding rod 2. The bracket 35 is attached to the upper end of the plunger 322 and supports a sheave 34 on which the rope 33 is hung. The bracket 35 is configured to move along a second guide rail 351 laid in the hoistway 101 in parallel with the first guide rail 21.

  The landing detection device 4 includes a landing detection unit 41 and a landing detection plate 42. The landing detection part 41 is arrange | positioned at the side part of the riding rod 2 as shown in FIG.1 and FIG.2. The landing detection unit 41 includes at least an upper sensor 411 and a lower sensor 412 that are disposed along the first guide rail 21. As shown in FIG. 1, the landing detection plate 42 is attached to the first guide rail 21 in correspondence with the landing position P <b> 1 where the carriage 2 stops on each floor. The upper sensor 411 and the lower sensor 412 are disposed so that the light transmitting portion and the light receiving portion face each other so that a signal output from the light transmitting portion can be directly received by the light receiving portion. As shown in FIG. 2, the landing detection plate 42 is installed so as to pass between the light transmitting portion and the light receiving portion of the upper sensor 411 and the lower sensor 412.

  The movement sensing device 5 includes a detected part 51 and a detecting part 52 as shown in FIG. The detected portion 51 is attached to the second guide rail 351 near the holding position H1 where the bracket 35 stops corresponding to the landing position P1 where the riding rod 2 stops. In the case of the hydraulic elevator 1 according to the first embodiment, since the rope 33 connected to the riding rod 2 is folded back by the sheave 34, if the distance that the bracket 35 moves is 1, the distance that the riding rod 2 moves. Is approximately 2. Therefore, the interval at which the detected portion 51 is installed on the second guide rail 351 is about half of the interval at which the landing detection plate 42 is installed on the first guide rail 21.

  As shown in FIG. 2, the detection unit 52 is attached to the bracket 35 and detects the detected unit 51 at the holding position H <b> 1 corresponding to the landing position P <b> 1 of the riding rod 2. The detection unit 52 includes a light transmitting unit and a light receiving unit arranged side by side. The signal output from the light transmitting unit is reflected by the detected unit 51 and received by the light receiving unit. As shown in FIG. 3, the detected portion 51 has an allowable range T that can be detected by the detecting portion 52 regardless of whether the detecting portion 52 is displaced upward or downward by a certain distance with respect to the holding position H1. ing. This allowable range T is smaller than the distance that the bracket 35 moves when the rider 2 moves within the effective range A in which the landing detection device 4 can detect the landing detection plate 42 by the landing detection unit 41.

  Further, as shown in FIGS. 2 and 4, the detected part 51 and the detection part 52 constituting the movement sensing device 5 are arranged within a range surrounded by the trajectory of the carriage 2 and the second guide rail 351. Is done. FIG. 1 is a schematic diagram developed and displayed for easy understanding of the configuration of the hydraulic elevator 1 including the landing detection device 4 and the movement detection device 5. FIG. 4 shows a state in which the detection unit 52 is positioned below the detected unit 51.

  As shown in FIGS. 1 and 5, the control unit 6 is connected to the door device 22, the pump 31, the landing detection device 4, and the movement detection device 5. The door device 22 outputs a door open signal until the door panel 221 is completely closed. The landing detection device 4 outputs a landing signal when the rider 2 is at the landing position P1. The movement sensing device 5 outputs a stop signal indicating that the riding rod 2 has not moved from the landing position P1 when the riding rod 2 is at the landing position P1.

  Note that the landing detection device 4 does not output a landing signal when the rider 2 deviates from the landing position P1. Therefore, the control unit 6 can detect that the riding rod 2 has deviated from the landing position P1 by detecting that the landing signal is not output. That is, the landing detection device 4 has a function as the movement detection device 5. Similarly, the movement sensing device 5 continues to output a stop signal when the ride 2 is stopped at the landing position P1. Therefore, the control unit 6 can detect that the riding rod 2 is at the landing position P1 by detecting that the stop signal is output. That is, the movement sensing device 5 functions as the landing detection device 4.

  In the hydraulic elevator 1 configured as described above, the control unit 6 operates the pump 31 to send the hydraulic oil L to the jack 32 to raise the riding rod 2, and stops the pump 31 to supply the hydraulic oil L. The carriage 2 is lowered by collecting it in the tank. When the controller 6 detects the landing signal output from the landing detection device 4 by moving the carriage 2 to the target floor, the hydraulic oil L is supplied from the pump 31 of the hydraulic drive device 3. Is stopped, the platform 2 is stopped at the landing position P1, the door device 22 is driven, and the door panel 221 is opened.

  Thereafter, the control unit 6 does not operate the control valve or the pump 31 of the hydraulic drive device 3 while detecting the door opening signal output from the door device 22. Moreover, the control part 6 continues monitoring whether the stop signal is output from the movement sensing apparatus 5, while the door open signal is detected.

  When the hydraulic oil L returns from the jack 32 to the pump 31 due to a failure of the control valve of the hydraulic drive device 3, the bracket 35 is lowered and the carriage 2 is lowered. As shown in FIG. 5, when the bracket 35 is lowered to such an extent that the detection unit 52 is disengaged from the front of the detected portion 51, the movement sensing device 5 does not output a stop signal. When the stop signal is no longer detected, the control unit 6 activates a check valve provided between the control valve of the hydraulic drive device 3 and the jack 32 or activates an emergency stop device provided on the riding rod 2. Or actuate an emergency device that mechanically prevents the plunger 322 from retracting into the cylinder 321.

  In the case where a plurality of safety devices are provided, the risk that each safety device will fail at the same time is much lower when different structures are installed at different locations than when the same structure is installed at the same position. In the first embodiment, the hydraulic elevator 1 has a movement sensing device 5 as a safety device between a bracket 35 attached to the upper end of the jack 32 and the second guide rail 351. In this hydraulic elevator 1, the landing detection device 4 installed between the riding rod 2 and the hoistway 101 also functions as the movement detection device 5. Therefore, even if one of the landing detection device 4 and the movement detection device 5 breaks down, the functions can be substituted for each other.

  When the landing signal output from the landing detection device 4 is not detected prior to the stop signal of the movement sensing device 5 when the riding board 2 deviates from the landing position P1, the control unit 6 detects the movement. It is determined that the device 5 is not functioning normally. And when it becomes necessary to stop the riding board 2 urgently, the riding board 2 is stopped urgently based on the landing signal of the landing detection device 4. When the movement sensing device 5 starts to output a stop signal before the landing detection device 4 outputs a landing signal when the rider 2 enters the landing position P1, the control unit 6 It is determined that the landing detection device 4 is not functioning normally. Then, in order to land the ride 2, the ride 2 is stopped at the landing position based on a stop signal from the movement sensing device 5. When it is determined that one of the control units 6 is not functioning normally, the control unit 6 notifies the management center in charge of the hydraulic elevator 1.

  In this way, during daily service, by monitoring the signals output by the landing detection device 4 and the movement detection device 5, even if one of them breaks down, the function as an elevator can be safely stopped. And take immediate action.

  The movement sensing device 5 configured to reflect the signal output from the detection unit 52 to the detected unit 51 and receive the signal by the detection unit 52 does not need a large installation place, and is additionally installed in the existing hydraulic elevator 1. Easy to adjust. The jack 32, the first guide rail 21, and the second guide rail 351 are each fixed by a support bracket in order to be fixed to the inner wall of the hoistway 101. In the hydraulic elevator 1, the detected part 51 and the detection part 52 of the movement sensing device 5 are arranged within a range surrounded by the locus of the riding rod 2 and the second guide rail 351. Therefore, there is no concern that the signal output from the detection unit 52 will be reflected by the support bracket and cause a malfunction while the detection unit 52 moves in a section where the detected unit 51 is not installed.

  The detected portion 51 has an allowable range T that can be detected even if the detecting portion 52 moves a certain distance around the holding position H1 of the bracket 35 corresponding to the landing position P1 of the riding rod 2. Therefore, when the landing detection device 4 breaks down, the tolerance 2 can be used to stop the riding rod 2 gently and safely at the landing position P1.

  The hydraulic elevator 1 according to the second embodiment will be described with reference to FIGS. 6 and 7. Configurations having the same functions as those of the hydraulic elevator 1 according to the first embodiment are denoted by the same reference numerals in the drawings. The description corresponding to each configuration refers to the description of the first embodiment, and the description here is omitted.

  As shown in FIGS. 6 and 7, in the hydraulic elevator 1 according to the second embodiment, the second guide rails 351 for guiding the bracket 35 are provided in a pair of plane symmetry with the jack 32 as the center. And the to-be-detected part 51 is each arrange | positioned at both of the 2nd guide rail 351 provided in a pair, and the detection part 52 is directed toward the to-be-detected part 51 provided in each of the 2nd guide rail 351. One pair is attached to the bracket 35 one by one. As shown in FIG. 7, both the detected part 51 and the detection part 52 are arranged within a range surrounded by the locus of the riding rod 2 and the second guide rail 351.

  In the hydraulic elevator 1 according to the second embodiment configured as described above, the group of detected parts 51 attached to one second guide rail 351 and the corresponding detecting parts 52 include the first It has the same function as the movement sensing device 5 constituted by the detected part 51 and the detection part 52 in the hydraulic elevator 1 of the embodiment. That is, the hydraulic elevator 1 of the second embodiment has two sets of movement sensing devices 5.

  Since it is unlikely that both movement sensing devices 5 will fail at the same time, the safety device of the hydraulic elevator 1 functions normally when either one operates normally. Furthermore, even if any of the detected parts 51 of the two movement sensing devices 5 is difficult to detect by the detecting part 52, the detected part at the holding position H1 corresponding to the landing position P1 on the same floor It is extremely rare that 51 cannot be detected simultaneously. That is, if one of the detected parts 51 on each floor can be detected, the movement sensing device 5 can be normally functioned by combining them. As described above, the lower the probability that the movement sensing device 5 is broken, the lower the maintenance cost.

  A hydraulic elevator 1 according to a third embodiment will be described with reference to FIG. FIG. 8 shows the detected portion 51 attached to the second guide rail 351 and the detecting portion 52 arranged at a position facing the detected portion 51. The detected part 51 of the hydraulic elevator 1 according to the third embodiment has an eave 511 protruding toward the detecting part 52 as shown in FIG. By providing the flange 511, the hydraulic elevator 1 according to the third embodiment allows dust flowing in the hoistway 101 and oil scattered from the rope 33 and the sheave 34 to fall on the surface of the detected part 51. Reduce.

  Since the other configuration is the same as that of the hydraulic elevator 1 shown in the first embodiment, configurations having the same functions are denoted by the same reference numerals in FIG. The description corresponding to the configuration is based on the description of the first embodiment, and the description is omitted here. In addition, regarding the configuration not shown in FIG. 8 as the hydraulic elevator 1, the description of the first embodiment and the corresponding drawings are taken into consideration.

  As described above, in the movement sensing device 5 installed in the hydraulic elevator 1 according to the first to third embodiments described above, the detected portion 51 and the detecting portion 52 are of a reflection type. In the case of the reflection type, even if the distance from the detection unit 52 to the detected unit 51 varies slightly, the detection system is not affected. Therefore, it is also easy to add the movement sensing device 5 to an existing hydraulic elevator.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the spirit and scope of the invention, and in the invention described in the claims and equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Hydraulic elevator, 2 ... Saddle, 21 ... 1st guide rail, 32 ... Jack, 33 ... Rope, 33A ... Fixed end, 33B ... Moving end, 34 ... Sheave, 35 ... Bracket, 351 ... 2nd Guide rail, 51... Detected portion, 52... Detecting portion, 101 .. hoistway, 511..., L .. hydraulic oil, P1 .. landing position, H1.

Claims (5)

Norikura moving along the first guide rail in the hoistway;
A jack which is supplied with hydraulic oil and extends;
A rope having a fixed end fastened to the lower part of the hoistway and a moving end connected to the norikura;
A bracket that is attached to an upper end of the jack and supports a sheave on which the rope is hung, and moves along a second guide rail;
A detected portion attached to the second guide rail in the vicinity of the holding position where the bracket stops corresponding to the landing position where the riding stops;
A hydraulic elevator, comprising: a detection unit that is attached to the bracket and detects the detected unit at the holding position corresponding to the landing position. 2. The hydraulic pressure according to claim 1, wherein the detected portion has an allowable range that is detected by the detecting portion even when the detecting portion is displaced by a certain distance with respect to the holding position. Expression elevator. 2. The hydraulic elevator according to claim 1, wherein the detection unit and the detected unit are disposed within a range surrounded by a trajectory of the carriage and the second guide rail. 2. The hydraulic elevator according to claim 1, wherein the detected portion includes a hook protruding toward the detecting portion at an upper portion. The second guide rails are provided in a symmetrical pair with the jack as a center,
5. The hydraulic elevator according to claim 1, wherein the detection unit and the detected unit are respectively disposed on both of the pair of second guide rails. 6.

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