JP5388063B2 - Signal input / output controller - Google Patents

Description

  The present invention relates to a signal input / output control device, and more particularly to a signal input / output control device used for renewal work of a hydraulic elevator.

  The hydraulic elevator operates the pump motor at full power when it rises. The hydraulic oil whose pressure has been increased by the pump is press-fitted into the hydraulic cylinder by a flow rate necessary for traveling control by the control valve, thereby realizing the operation of the car.

  The hydraulic elevator consumes a lot of power because the pump motor is always operated at full power when it rises, but the hydraulic elevator has been installed and operated because it is not subject to layout restrictions such as building height restrictions. However, it is important to respond to energy savings, and there are many cases where renewal of machine roomless elevators is performed.

  In the case of renewing the hydraulic elevator, a method has been adopted in which articles used in the hoistway are removed and updated to a machine roomless elevator (see, for example, Patent Document 1 and Patent Document 2).

JP 2008-30891 A JP 2002-37563 A

  In the method by removing the supplies from the hoistway, the elevator stops completely during the construction period and the equipment for moving up and down the building is lost. Depending on the scale, the construction period could be as long as three weeks or more, which would inconvenience the building user.

  Therefore, keep the equipment to be removed to a minimum, place equipment such as a machine roomless elevator hoisting machine in the space where the hydraulic cylinder is not placed, stop it intermittently, and proceed with the construction. A construction method is also conceivable in which the entire construction is stopped at the point of time and the remaining construction process is completed.

  The following items become problems in reducing the total outage period during renewal construction. In general, hydraulic elevators whose operation is controlled by a relay sequence have switch groups arranged vertically along rails in the hoistway. The switch groups installed in these places are used for operations such as start of deceleration and switching of position display lamps and display control when a car moves and reaches its operating position. These switches may be removed at the beginning of the construction stage, but since the car position information cannot be obtained when the switches are removed, normal operation cannot be performed. Therefore, during the construction period, the elevator had to be stopped for construction.

  Accordingly, the present invention has been made in view of the above-described problems, and instead of a switch group removed from the hoistway performed in the initial stage of construction, a signal output device that outputs a corresponding signal according to the position of the car. It is intended to provide.

According to one aspect of the present invention, (1) a position detection switch that is attached to each floor in a hoistway of a hydraulic elevator, and (2) a position display that switches a position display of the moving car. Changeover switch, (3) Ascending deceleration start switch that controls the rising car when landing the car on the desired floor, (4) Controlling the falling car when landing the car on the desired floor A signal equivalent to each output signal of the descending deceleration start switch is replaced with the position detection switch, the position display changeover switch, the ascending deceleration start switch, and the descending deceleration start switch as the car moves up and down. Thus, a signal input / output control device that is generated in a pseudo manner is provided.

The switches (1) to (4) are necessary for traveling control. In addition, a subsidence detection switch for detecting that the car of the hydraulic elevator sinks from the reference level floor during operation stop is provided in the hoistway. It is also possible to provide a signal equivalent to the output signal of the settlement detection switch attached to the lowest floor.

   According to the present invention, since a pseudo signal indicating car position information can be input to the control panel, the renewal work can be smoothly advanced without stopping the elevator entirely while having a normal operation function. It becomes possible.

It is a block diagram of the elevator incorporating the signal input / output control apparatus which concerns on embodiment of this invention. It is a schematic block diagram of a signal input / output control device. It is an operation diagram of each operation switch.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected about the same location and the overlapping description is abbreviate | omitted.

  FIG. 1 is a configuration diagram of a hydraulic elevator incorporating a signal output device according to an embodiment of the present invention. When the hydraulic elevator is raised, the pump unit is fully operated by the power unit 15, and the hydraulic oil whose pressure has been increased by the pump is press-fitted into the hydraulic cylinder 8 by a control valve (not shown), so Perform lifting operation.

  As shown in FIG. 1, a small rotary encoder 2 is attached to the rotating shaft of the governor tensioner 1. A signal input / output control device 4 is installed in the vicinity of the cylinder stand 3 in the elevator pit. The installation location of the signal input / output control device 4 is not particularly limited. When the hoistway area is small, the installation layout of the signal input / output control device 4 can be selected as appropriate as long as it can be inspected.

  In the hydraulic elevator, a plurality of operation switches 6 (6 ′, 6 ″,...) That are actuated by the detection plate 5 installed in the car 7 are attached over the entire length of the guide hoistway rail in the hoistway. These operation switches 6 are indispensable for operation control of a hydraulic elevator, and are generally switches having the following functions.

(1) FLS: Position detection switch on the nth floor (2) PLS: Position display changeover switch on the nth floor and (n + 1) floor (3) SDL: Deceleration start deceleration switch for landing on the nth floor (4) SUL: Deceleration start switch at the time of ascending operation for landing on the nth floor Here, n is an integer having the maximum number of floors of the building where the hydraulic elevator is installed. Since the signals on each floor are individual signals, the number of signal points is {4 (n-1) +1).

  These operation switches 6 output respective signals as the car moves up and down. FIG. 3 is an example of a diagram showing the relationship between the car position and the output of each operation switch. As shown in FIG. 3, the position detection switch FLS indicating which floor the car is on outputs an ON signal every time it reaches each floor. The position display changeover switch PLS is, for example, ½H, which is half the height H of the floor when the car passes from the nth floor to the (n + 1) th floor and passes between the nth floor and the (n + 1) th floor. When the vehicle has passed, an ON signal is output, and the display of the floor indicating the current position of the car is switched. When the car is landing on the nth floor, the deceleration start switch SDL at the time of descent operation outputs an ON signal when the car reaches the descending deceleration distance B while moving from the (n + 1) th floor to the nth floor. The value of B can be determined in consideration of the braking capability of the installed hydraulic elevator. The start-up deceleration start switch SUL when landing the car on the nth floor outputs an ON signal when the car reaches the ascending deceleration distance A while moving from the (n-1) th floor to the nth floor. To do. The value of A can be determined in consideration of the braking capacity of the installed hydraulic elevator.

  In addition to these switches, legal safety switches, direction restrictions, and terminal floor forced stop switches are installed separately. Furthermore, a switch for detecting the engagement area between the car door and the hold door as well as the vertical position of the floor of the car and the hall by installing a plate 9 on each floor and placing a switch on the car side. (Not shown) is installed.

  Next, the progress of the hydraulic elevator renewal work will be described. In the initial stage of the renewal work of the hydraulic elevator, the back surface of the car 7 is vacant except for the installation space of the hydraulic cylinder 8. Therefore, machine room-less elevator equipment is additionally installed such that a counter hoistway rail (not shown) is set up in the space and a hoisting machine is placed at the top.

  On the other hand, since the operation switch 6 (6 ′, 6 ″,...) Described above interferes with the addition of various devices, there is a request to be removed at the initial stage of construction. However, the operation switch 6 is removed. In this case, the signals from the PLS, FLS, SUL, and SDL switches are lost, and the hydraulic elevator cannot be operated.

  Therefore, in the renewal work, the signal input / output control device 4 that generates a pseudo signal of the output signals of these switches is used.

  FIG. 2 is a configuration diagram of the signal input / output control device 4. As shown in FIG. 2, the signal input / output control device 4 includes a control unit main body 11, a watchdog timer (hereinafter abbreviated as WDT) 12 for detecting an abnormality in the signal input / output control device 4, The relay 13 is configured.

  The control unit main body 11 can be constituted by, for example, PLC (Programmable Logic Controllers) having abundant input / output functions. The control unit main body 11 includes an input interface for connecting to the rotary encoder 2. A position signal synchronized with the vertical position of the car is input from the rotary encoder 2. Furthermore, it has a plurality of output ports for outputting in accordance with the obtained car position signal. From the output port, it is output in the same output order and form as the output signals from the PLS, FLS, SUL and SDL switches arranged in the hoistway described above. Therefore, when renewing the hydraulic elevator, even if the existing PLS, FLS, SUL, and SDL switches are removed, the signal input / output control unit outputs the output signals from the PLS, FLS, SUL, and SDL switches. It is possible to obtain signals having the same output order and form. It is preferable that the control unit main body 11 has a self-diagnosis function. Furthermore, abnormality detection can be ensured by the WDT 12 connected to the outside of the control unit main body 11.

  The WDT 12 monitors a program or the like incorporated in the control unit main body 11 and is a timer that can be cleared from a program to be monitored but cannot be stopped. The WDT 12 is normally used so that it does not operate. Normally, the WDT 12 does not generate a WDT interrupt or reset by periodically clearing it so as not to overflow. The WDT 12 is a free-running timer that keeps counting the designated clock once activated. The time until overflow is determined by the count clock frequency, and nothing happens if it is counted and cleared before overflow. If an overflow occurs and a WDT interrupt occurs or a reset is applied, a program abnormality is detected.

  It should be noted that when the control unit main body 11 adopts an apparatus configuration that is recognized as ensuring sufficient safety without functionally providing the WDT 12, it is of course not necessary to include the WDT 12. It is.

  The disconnecting relay 13 limits the power supply to the control unit main body 11 when a disconnection, a ground due to the disconnection, a short circuit, or the like occurs, and realizes a safety circuit in the event of an abnormality.

  During the renewal work, an inspection plate (not shown) must be removed because it is attached from the rail in the hoistway via the support material. About this, it can replace by the method of attaching the check-in board 9 and the landing switch 10 to the hall sill which is a general method in a machine room-less elevator. Even if the length of the test plate changes, it can be handled by attaching an extension plate.

  Thus, even if the switch attached to each part of the rail in the hoistway and the test plate on each floor are removed, the signal input / output control device composed of the rotary encoder 2 and the PLC attached to the governor rotating shaft in the elevator pit. 4 performs an equivalent signal output, so that the operation service can be continued even during the renewal work. When renewal work is not continued until night, operation services can be provided by using conventional control.

  The work required for the renewal work can be handled with minor modifications such as installing the signal input / output control device 4 and the rotary encoder 2 and inserting the contact circuit of the relay 13 for the signal line and safety circuit. is there.

  In addition to this, it is possible to add functions such as taking in the valve control signal of the control panel, detecting the occurrence of an abnormality that does not synchronize with the movement of the car, and stopping the operation.

  After the renovation work, the rotary encoder 2 and the signal input / output control unit 4 are not required. However, it is economical because it can be applied to other renewal properties as long as the floor and floor height information is replaced. .

(Second Embodiment)
Next, a second embodiment will be described.

  When not in use, the hydraulic elevator stands by at the lowest floor level to return all the hydraulic oil to the tank. Due to aging of hydraulic valves and the like, re-level operation is not performed during the suspension of operation, regardless of normal times, so there is a concern that the car may sink to the final limit switch as it is. Therefore, it is preferable to arrange a switch for detecting that the car has sunk beyond a certain distance M beyond the level. The settlement detection switch DLS is also removed during the renewal work.

  Therefore, in this embodiment, in addition to the output signals from the PLS, FLS, SUL, and SDL switches, the output signal of the subsidence detection switch DLS is output from the signal input / output control device 4 in the same output order and in the same form. Generate pseudo.

  According to the present embodiment, the renewal work can be safely advanced even if the hydraulic elevator undergoes a long-term operation stoppage.

(Third embodiment)
Subsequently, a third embodiment will be described.

  In the third embodiment, a rubber roller (not shown) is attached based on a roller guide or upper beam of a car. The rotary encoder 2 is attached to the rotation shaft of the rubber roller so that the rotation shaft is the same. The rubber roller is pressed against the rail in the hoistway so that the rotary encoder 2 detects the position information of the car in synchronization with the movement of the car.

  According to such a configuration, as long as the signal input / output control device 4 and the rotary encoder 2 are attached on the car, the switch attached to the rail in the hoistway can be removed.

  According to the second embodiment, it is possible to proceed with the renewal work only by intermittently stopping the operation of the elevator only by work on the car.

(Fourth embodiment)
Subsequently, a fourth embodiment will be described.

  In the fourth embodiment, vertical position information synchronized with the car position is input, and a plurality of signals are output ON and OFF at a specific height region.

  In the apparatus having such a configuration, the floor selector in the rope type elevator can be used as it is, and the forced deceleration device at the terminal floor can be adopted as the other configuration. Since the usage is different, it cannot be applied simply by mounting, but the device configuration is sufficiently and fully equipped. Therefore, since the function can be realized only by changing the internal programming, the apparatus can be diverted.

In this way, every time the site of the renewal work changes, it is possible to realize a predetermined function only by changing the program without developing a new device.

(Fifth embodiment)
The signal input / output control device 4 is not limited to the above-described configuration, and inputs a car position signal in a non-contact manner, opens and closes a semiconductor contact according to the current car position, and operates a relay sequence of the control panel. Can also be configured.

  In particular, in the operation control of high-speed elevators, a terminal floor forced reduction device (hereinafter referred to as ETS) is employed so that the car does not collide with the end of the hoistway. That is, a trigger switch that sends a signal that has entered the hoistway terminal area to the control unit and a traveling speed of the car while the car is in the terminal area, If it is determined that the car cannot be stopped before reaching the end of the hoistway from the relationship between the car speed and the current car position, the safety device is shut off and the car crashes into the hoistway end by rapidly decelerating the car. To prevent. The ETS needs to have a function of monitoring the position and speed of the car. If it has a function of monitoring the car position, the signal input / output control device 4 can be configured by adding a function of outputting a necessary signal each time in a specific position area. For example, to physically detect that the terminal area has been entered at one or more locations on the hoistway, usually at a distance of a certain distance from the upper and lower ends (two locations above and below the hoistway). Place a limit switch to force deceleration or force stop. ETS is a safety protection device that has independent power supply, independently monitors the car position speed, shuts off the safety device and stops the car without depending on the operation function of the elevator control device, so install ETS However, if a programmable controller is used in the ETS controller, an additional program that outputs signals according to the position (with the required number of signal output ports is provided). It is also necessary) to realize the function.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components in the hoistway rail shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Governor tensioner, 2 ... Rotary encoder, 3 ... Cylinder stand, 4 ... Signal input / output control device, 5 ... Detection plate, 6, 6 ', 6 ", ... Operation switch, 7 ... Cage, 8 ... Hydraulic cylinder, 9 … Inspection board inspection, 10… landing switch, 14… hoistway, 15… power unit.

Claims (7)

Installed on each floor in the hoistway of the hydraulic elevator,
(1) A position detection switch for detecting the position of the car on each floor,
(2) A position display switch for switching the position display of the moving car,
(3) Ascending deceleration start switch for controlling the ascending car when landing the car on the desired floor,
(4) Deceleration start switch when descending to control the descending car when landing the car on the desired floor,
In place of the position detection switch, the position display changeover switch, the ascending deceleration start switch, and the descending deceleration start switch, a signal equivalent to each output signal is generated in a pseudo manner as the car moves up and down. A signal input / output control device. Installed a subsidence detection switch in the hoistway to detect that the hydraulic elevator car will sink from the lowest floor until the final limit switch is activated,
2. The signal input / output control device according to claim 1, wherein a signal equivalent to an output signal of the sink detection switch is generated in a pseudo manner when the sinking amount of the car exceeds a certain distance.   3. The signal input / output control device according to claim 1, wherein a rotary encoder is attached to a rotating shaft of a governor or a governor tensioner, and position information of the car is acquired from an output of the rotary encoder.   A rubber roller is arranged on the upper part of the car, a pulse encoder is attached to the rotating shaft of the rubber roller, the rubber roller is pressed against the rail in the hoistway, and the position information of the car is obtained from the pulse encoder in synchronization with the movement of the car. 3. The signal input / output control device according to claim 1, wherein the signal input / output control device is obtained.   The signal input / output control device includes a control unit main body configured as PLC (Programmable Logic Controllers), a watch dog timer for detecting an abnormality in the control unit main body, and a safety circuit for the signal input / output control unit. 5. The signal input / output control device according to claim 1, further comprising a blocking relay. 6.   The signal input / output control device comprises a floor selection machine that inputs a car position signal in a non-contact manner, opens and closes semiconductor contacts according to the current car position, and operates a relay sequence of the control panel. The signal input / output control device according to claim 1.   The signal input / output control device has a function of monitoring a position and speed of a car, and is configured by a terminal floor forced reduction device so that the car does not collide with the end of the hoistway. The signal input / output control device according to claim 5.