Elevator control device

Abstract

Provided is an elevator control device capable of adjusting the stop position for each floor even when the stop position for each floor is set with reference to a reading position of a linear scale provided in a hoistway. In a control device (C), an adjustment unit (9) calculates an adjusted distance (D* (72)) by dividing, by a total adjustment coefficient (F), the difference obtained by subtracting a first offset value (X1) corresponding to the reading value of a linear scale 4 at the floor surface position of the lowest floor from uppermost end position information (Y0) corresponding to the uppermost part of the hoistway. The adjustment unit (9) calculates an adjusted distance (D* (71)) by dividing, by the total adjustment coefficient (F), the difference obtained by subtracting a first stop floor position (Y1 (71)) corresponding to the reading value of the linear scale (4) at the floor surface position of a stop floor (71) from the uppermost end position information (Y0). The adjustment unit (9) calculates a second stop floor position (Y2 (71)) as the adjusted stop position, by subtracting the distance (D* (71)) from the uppermost end position information (Y0).

Description

Elevator control device

[0001] The present disclosure relates to a control device for an elevator.

[0002] Patent Document 1 discloses an example of an elevator control device. A first detectable object is provided at a stopping position of each floor in the elevator shaft. The elevator includes a first position detection unit that detects the first detectable object and a second position detection unit that detects the absolute position of the car in the shaft using a second detectable object such as a linear scale. In the elevator, the stopping position of each floor is adjusted based on the difference between the absolute position detected by the second position detection unit when the first position detection unit detects the first detectable object and the pre-stored stopping positions of each floor.

[0003] International Publication No. 2021 / 002107

[0004] The elevator of Patent Document 1 requires detection of a first detectable object provided at the stopping position of each floor. Therefore, adjustment of the stopping position of the elevator cannot be applied when the stopping position of each floor is set based on the reading position of the linear scale, such as when the first detectable object is not provided at the stopping position of each floor.

[0005] The present disclosure is directed to solving such problems, and provides an elevator control device that can adjust the stopping positions of each floor, even when the stopping positions of each floor are set based on the reading position of a linear scale installed in the elevator shaft.

[0006] The elevator control device according to the present disclosure comprises: a linear scale that is provided along a travel path of a car that travels up and down in a hoistway, a fixed end that is one end in the up and down direction is fixed, and position information within the hoistway is attached along the longitudinal direction; a position detector that is provided in the car and detects the absolute position of the car in the hoistway by reading the position information attached to the linear scale; a car control unit that controls the travel of the car based on the absolute position of the car detected by the position detector from the position information of the linear scale; and an adjustment unit that adjusts the absolute position of the car used for control by the car control unit, and in adjusting the absolute position of the car, the adjustment unit acquires fixed-side terminal position information that indicates the position of an end end on the fixed end side, and adjusts the position when the car is located at a floor position of a terminal floor on the opposite side of the fixed end. a first offset value, which is the position information read by the position detector from the linear scale; a first adjusted distance is calculated by subtracting the first offset value from the fixed side terminal position information and dividing the difference by a predetermined overall adjustment coefficient; a second offset value is calculated by subtracting the first adjusted distance from the fixed side terminal position information; a first stopping floor position, which is the position information read by the position detector from the linear scale when the elevator is positioned at the floor position of any other stopping floor that is a terminal floor on the opposite side of the fixed end; a second adjusted distance for the stopping floor is calculated by subtracting the second adjusted distance for the stopping floor from the fixed side terminal position information and dividing the difference by the overall adjustment coefficient; and a second stopping floor position is calculated as the adjusted stopping position for the stopping floor by subtracting the second adjusted distance for the stopping floor from the fixed side terminal position information.

[0007] According to the control device of the present disclosure, it is possible to adjust the stopping position of each floor even in an elevator in which the stopping position of each floor is set based on the reading position of a linear scale installed in the elevator shaft.

[0008] Fig. 1 is a configuration diagram of an elevator according to embodiment 1. Fig. 2 is a diagram illustrating an example of adjustment of the absolute position of a car in a control device according to embodiment 1. Fig. 3 is a flowchart illustrating an example of the operation of a control device according to embodiment 1. Fig. 4 is a hardware configuration diagram of a main part of a control device according to embodiment 1.

[0009] The following describes embodiments of the subject matter of the present disclosure with reference to the accompanying drawings. In each drawing, identical or corresponding parts are designated by the same reference numerals, and redundant explanations are appropriately simplified or omitted. Note that the subject matter of the present disclosure is not limited to the following embodiments, and any component of the embodiments may be modified or omitted within the scope of the gist of the present disclosure.

[0010] First Embodiment Fig. 1 is a configuration diagram of an elevator according to a first embodiment.

[0011] Elevators are used in buildings with multiple floors. An elevator shaft is provided in the building. The shaft is a long space extending vertically between multiple floors. The elevator includes a car 1, a rope 2, and a hoist 3. The car 1 is a device on which passengers board. The car 1 is disposed in the hoistway. The rope 2 is a device that supports the load of the car 1. The rope 2 is a long object such as a strand rope or a belt rope. The hoist 3 is a device that generates a driving force to propel the car 1. The hoist 3 is disposed at the top or bottom of the hoistway. If a machine room for the elevator is provided above the hoistway, the hoist 3 may be disposed in the machine room. The rope 2 is wound around the hoist 3. The rope 2 is wound around a sheave of the hoist 3. In the elevator, one side of the rope 2 wound around the sheave is wound up by the driving force generated by the hoisting machine 3, and the car 1 supported by the rope 2 travels up and down the elevator shaft.

[0012] The elevator is provided with a control device C for controlling the operation of the elevator. The control device C includes a linear scale 4 and a position detector 5.

[0013] The linear scale 4 is disposed in the elevator shaft along the travel path of the car 1. The linear scale 4 is, for example, a long object in the shape of a tape, ribbon, belt, rope, or rod. The longitudinal direction of the linear scale 4 is oriented in the vertical direction, which is the travel direction of the car 1. Position information within the elevator shaft corresponding to the absolute vertical position of the car 1 in the elevator shaft is provided to the linear scale 4. The position information within the elevator shaft is provided along the longitudinal direction of the linear scale 4 by, for example, electromagnetic properties, optical properties, mechanical shape or properties, or a geometric surface pattern. In this example, the linear scale 4 is provided in a suspended manner such that the upper end 41 is fixed and the lower end 42 is movable in the vertical direction. The upper end 41 is an example of a fixed end. The lower end 42 is an example of a movable end opposite the fixed end. The linear scale 4 has an expandable / contractible characteristic. The lower end 42, which is the movable end, may be held by an elastic body such as a spring so as to apply tension to the linear scale 4, or may be held by a slide bearing or the like. Note that the linear scale 4 may be provided such that the lower end 42 is fixed and the upper end 41 is movable in the vertical direction.

[0014] The position detector 5 is provided on the car 1. The position detector 5 is fixed to the car 1. The position detector 5 has a function of reading the position information attached to the linear scale 4. The position detector 5, which moves in the elevator shaft together with the car 1, reads the position information of the linear scale 4, thereby reading the absolute position of the car 1 in the elevator shaft.

[0015] The control device C includes a car control unit 6. The car control unit 6 is mounted on a control panel provided, for example, at the top or bottom of the elevator shaft or in the machine room. The car control unit 6 is a part that has a function for controlling the running of the car 1. The car control unit 6 controls the running of the car 1 using a read value obtained by a position detector 5 reading the position information attached to the linear scale 4. The car control unit 6 may apply the read value to a door-open running protection device and a terminal floor forced deceleration device provided in the elevator.

[0016] In this example elevator, stops 71, 72, and 73 are set. Stop 71 is the top floor. Stop 72 is the bottom floor. Stop 73 is an intermediate floor. In the elevator, multiple intermediate floors including floors other than stop 73 may be set. The number and height of elevator stops vary depending on the structure of the building, such as the height and number of floors.

[0017] The control device C includes a memory unit 8 and an adjustment unit 9. The memory unit 8 and the adjustment unit 9 are mounted on a control panel provided, for example, at the upper or lower part of the elevator shaft, or in a machine room. The memory unit 8 is a unit equipped with a function for storing information. The adjustment unit 9 is a unit equipped with a function for adjusting the absolute position of the car 1 read by the position detector 5. The adjustment made by the adjustment unit 9 is reflected in the control of the running of the car 1 by the car control unit 6. The memory unit 8 stores, for example, the read values ​​of the position detector 5 of the linear scale 4 at stopping positions such as stopping floors 71, 72, and 73. The memory unit 8 may store adjustment parameters used by the adjustment unit 9 and the like, adjustment results by the adjustment unit 9, and the like.

[0018] Next, an example of adjustment of the absolute position of the car 1 will be described with reference to Fig. 2. Fig. 2 is a diagram illustrating an example of adjustment of the absolute position of the car 1 in the control device C according to the first embodiment.

[0019] The adjustment of the absolute position of the car 1 is performed, for example, after replacing the linear scale 4. The adjustment of the absolute value of the car 1 may be performed at another timing.

[0020] First, the adjustment unit 9 acquires the top end position information Y0. The top end position information Y0 represents the position of the top end of the elevator shaft. The top end position information Y0 represents, for example, the position of the terminal end on the top end 41 side, which is the fixed end side of the linear scale 4. Since the top end 41 side of the linear scale 4 is the fixed end side, the top end position information Y0 is an example of fixed side terminal position information. The top end position information Y0 corresponds, for example, to the position information read from the linear scale 4 by the position detector 5 when the car 1 is at the top end of the range in which it can travel in the elevator shaft. The top end position information Y0 corresponds, for example, to the position information attached to the fixed end of the linear scale 4. In this example, the position of the terminal end on the top end 41 side is above the floor level of the stop floor 71, which is the top floor. Here, the floor position of a certain floor refers to a position where, when the car 1 is located at the floor position of that floor, the height of the floor of the car 1 and the height of the floor of that floor coincide within a range that does not interfere with passengers getting on and off the car 1. This range is, for example, but is not limited to, a range of ±10 mm. The adjustment unit 9 may acquire the top end position information Y0 from a read value that the position detector 5 actually reads from the linear scale 4, or may acquire the top end position information 91 through direct input by an operator who performs adjustment work on the absolute position of the car 1. Here, the direct input by the operator may be, for example, direct input of the results of actual measurements made by the operator using a tape measure or the like.

[0021] Next, the adjustment unit 9 acquires a first offset value X1. The first offset value X1 corresponds to position information read by the position detector 5 from the linear scale 4 when the car 1 is located at the floor position of the stopping floor 72, which is the lowest floor. Here, the lower end 42 side of the linear scale 4 is the movable end side opposite the fixed end, so the stopping floor 72, which is the lowest floor, is an example of a terminal floor opposite the fixed end. The first offset value X1 represents the distance between the floor position of the stopping floor 72 and the position of the lower end 42 when position information 0 is assigned to the lower end 42 of the linear scale 4. For example, after an operator runs the car 1 to the floor position of the stopping floor 72, the adjustment unit 9 acquires the first offset value X1 based on the read value actually read by the position detector 5 from the linear scale 4. The operator runs the car 1 to the floor position of the stopping floor 72, for example, by manual operation. The adjustment unit 9 may also acquire the first offset value X1 by other methods.

[0022] The adjustment unit 9 performs a calculation to adjust the absolute position of the car 1 using a preset overall adjustment coefficient F. The overall adjustment coefficient F is stored in the storage unit 8 as a parameter that can be adjusted by, for example, an operator. The initial value of the overall adjustment coefficient F is set to a value such as 1. Alternatively, the initial value of the overall adjustment coefficient F may be set to a ratio R obtained by dividing a distance D (72) obtained by subtracting the first offset value X1 from the top end position information Y0 by the distance from the floor position of the stopping floor 72 to the position of the upper end of the elevator shaft. Here, the distance from the floor position of the stopping floor 72 to the position of the upper end of the elevator shaft, which corresponds to the denominator of the ratio R, is set in advance based on, for example, building design information. The distance is stored in, for example, the storage unit 8. The overall adjustment coefficient F may be adjusted from its initial value by, for example, an operator. The overall adjustment coefficient F is used, for example, to adjust the influence of expansion and contraction of the linear scale 4.

[0023] The adjustment unit 9 calculates the distance D(72) by subtracting the first offset value X1 from the top end position information Y0. The adjustment unit divides the distance D(72) by the overall adjustment coefficient F to calculate the adjusted distance, distance D*(72). Distance D*(72) is an example of the first adjusted distance. When the settings of the overall adjustment coefficient F and the like are appropriate, distance D*(72) corresponds to the true distance from the floor position of the stop floor 72 to the position of the upper end of the elevator shaft.

[0024] The adjusting unit 9 calculates the second offset value X2 by subtracting the distance D*(72) from the uppermost edge position information Y0. The second offset value X2 is the offset value after adjustment by the adjusting unit 9.

[0025] Next, the adjustment unit 9 performs adjustment for the other stopping floors of the stopping floor 72, which is the lowest floor. The adjustment unit 9 performs adjustment for the stopping floor 71, which is the highest floor, for example.

[0026] The adjustment unit 9 acquires a first stopping floor position Y1 (71) for the stopping floor 71. The first stopping floor position Y1 (71) corresponds to position information that the position detector 5 reads from the linear scale 4 when the car 1 is located at the floor position of the stopping floor 71. For example, after an operator runs the car 1 to the floor position of the stopping floor 71, the adjustment unit 9 acquires the first stopping floor position Y1 (71) based on the read value that the position detector 5 actually reads from the linear scale 4. The operator runs the car 1 to the floor position of the stopping floor 71 by, for example, manual operation. The adjustment unit 9 may also acquire the first stopping floor position Y1 (71) by other methods.

[0027] The adjustment unit 9 calculates the distance D(71) by subtracting the first stop floor position Y1(71) from the top end position information Y0. The adjustment unit divides the distance D(71) by the overall adjustment coefficient F to calculate the adjusted distance D*(71). The distance D*(71) is an example of the second adjusted distance. When the settings of the overall adjustment coefficient F and the like are appropriate, the distance D*(71) corresponds to the true distance from the floor position of the stop floor 71 to the position of the top end of the elevator shaft.

[0028] The adjustment unit 9 subtracts the distance D*(71) from the top end position information Y0 to calculate the second stop floor position Y2(71) for the stop floor 71. The second stop floor position Y2(71) is the stop position of the car 1 for the stop floor 71 after adjustment by the adjustment unit 9.

[0029] The adjustment unit 9 subtracts the second offset value X2 from the second stop floor position Y2 (71) to calculate the lowest-floor-based inter-floor distance H(71) for the stop floor 71. The inter-floor distance H(71) is the inter-floor distance between the stop floor 71 and the lowest stop floor 72 after adjustment by the adjustment unit 9.

[0030] Next, the adjustment unit 9 performs adjustment for the other stopping floors, namely the stopping floor 72, which is the lowest floor, and the stopping floor 71. The adjustment unit 9 performs adjustment for the stopping floor 73, which is an intermediate floor, for example.

[0031] The adjustment unit 9 acquires a first stopping floor position Y1 (73) for the stopping floor 73. The first stopping floor position Y1 (73) corresponds to position information that the position detector 5 reads from the linear scale 4 when the car 1 is located at the floor position of the stopping floor 73. For example, after an operator runs the car 1 to the floor position of the stopping floor 73, the adjustment unit 9 acquires the first stopping floor position Y1 (73) based on the read value that the position detector 5 actually reads from the linear scale 4. The operator runs the car 1 to the floor position of the stopping floor 73 by, for example, manual operation. The adjustment unit 9 may also acquire the first stopping floor position Y1 (73) by other methods.

[0032] The adjustment unit 9 calculates the distance D(73) by subtracting the first stop floor position Y1(73) from the top end position information Y0. The adjustment unit divides the distance D(73) by the overall adjustment coefficient F to calculate the adjusted distance D*(73). The distance D*(73) is an example of the second adjusted distance. When the settings of the overall adjustment coefficient F and the like are appropriate, the distance D*(73) corresponds to the true distance from the floor position of the stop floor 73 to the position of the top end of the elevator shaft.

[0033] The adjustment unit 9 subtracts the distance D*(73) from the top end position information Y0 to calculate the second stop floor position Y2(73) for the stop floor 73. The second stop floor position Y2(73) is the stop position of the car 1 for the stop floor 73 after adjustment by the adjustment unit 9.

[0034] The adjustment unit 9 subtracts the second offset value X2 from the second stop floor position Y2 (73) to calculate the lowest-floor-based inter-floor distance H(73) for the stop floor 73. The inter-floor distance H(73) is the inter-floor distance between the stop floor 73 and the lowest stop floor 72 after adjustment by the adjustment unit 9.

[0035] If the elevator is set to stop at other intermediate floors, the adjustment unit 9 performs the same adjustment for the other intermediate floors.

[0036] The worker performing the adjustment work may adjust the absolute position of the car 1 using values ​​such as the second offset value X2, the lowest-floor-based floor distance H(71), or the lowest-floor-based floor distance H(73) as adjustable parameters. The worker may adjust these parameters instead of or in addition to adjusting the overall adjustment coefficient F. For example, when the overall adjustment coefficient F, the second offset value X2, and the lowest-floor-based floor distance H(71) are adjusted as parameters, the adjustment unit 9 back-calculates the read value of the position detector 5 at the floor position of the stop floor 71 based on these parameters. At this time, the adjustment unit 9 back-calculates the second stop floor position Y2(71), for example, so that the difference obtained by subtracting the second offset value X2 from the second stop floor position Y2(71) is the lowest-floor-based floor distance H(71). The adjustment unit 9 back-calculates the distance D*(71) so that the difference obtained by subtracting the distance D*(71) from the topmost position information Y0 becomes the second stopping floor position Y2(71). The adjustment unit 9 back-calculates the read value of the linear scale 4 at the position corresponding to the first stopping floor position Y1(71) so that the difference obtained by subtracting the first stopping floor position Y1(71) from the topmost position information Y0 divided by the overall adjustment coefficient F becomes the distance D*(71). At this time, the adjustment unit 9 may use values ​​acquired or calculated during the most recent adjustment as the information on each position and distance used in the back-calculation. The information on each position and distance used in the back-calculation is stored in the memory unit 8, for example.

[0037] The adjustment unit 9 performs adjustment of a specific point that does not coincide with the floor surface position of any floor, for example, as follows: The specific point is, for example, a stopping position between floors, above the top floor, or below the bottom floor. The specific point may be, for example, a position in the elevator shaft that serves as a reference for acceleration or deceleration of the car 1. The specific point may be, for example, any other position between floors, above the top floor, or below the bottom floor. The specific point may be, for example, the current position of the car 1.

[0038] The adjustment unit 9 acquires a first specific point position Z1 for the specific point to be adjusted. The first specific point position Z1 corresponds to position information that the position detector 5 reads from the linear scale 4 when the car 1 is located at the specific point. For example, after an operator runs the car 1 to the specific point, the adjustment unit 9 acquires the first specific point position Z1 based on a read value that the position detector 5 actually reads from the linear scale 4. The operator runs the car 1 to the specific point by, for example, manual operation. The adjustment unit 9 may also acquire the first specific point position Z1 by other methods.

[0039] The adjustment unit 9 calculates the distance E for the specific point by subtracting the first specific point position Z1 for the specific point to be adjusted from the uppermost edge position information Y0. The adjustment unit calculates the distance E* as the adjusted distance by dividing the distance E by the overall adjustment coefficient F. The distance E* is an example of the third adjusted distance.

[0040] The adjustment unit 9 calculates a second specific point position Z2 for the specific point to be adjusted by subtracting the distance E* for the specific point to be adjusted from the uppermost edge position information Y0. The second specific point position Z2 is the position of the specific point after adjustment by the adjustment unit 9.

[0041] The car control unit 6 controls the running of the car 1 based on the positional relationship between the second specific point position Z2, the second offset value X2, the second stopping floor position Y2 (71), and the second stopping floor position Y2 (73) determined by the adjustment unit 9, as well as the corrected distances D* (72), D* (71), D* (73), and E*, etc. The car control unit 6 controls the running of the car 1 based on, for example, the positional relationship between the second specific point position Z2 for the current position of the car 1 and the second stopping floor position Y2 of each stopping floor, etc.

[0042] Next, an example of the operation of the control device C will be described with reference to Fig. 3. Fig. 3 is a flowchart showing an example of the operation of the control device C according to the first embodiment.

[0043] In step S01, the adjustment unit 9 acquires uppermost edge position information Y0. Then, in step S02, the adjustment unit 9 acquires a first offset value X1. Then, in step S03, the adjustment unit 9 calculates the adjusted distance D*(72) and a second offset value X2. Then, the process of the control device C proceeds to step S04.

[0044] In step S04, the adjustment unit 9 determines whether there are any unadjusted stopping floors. If there are any unadjusted stopping floors, the processing of the control device C proceeds to step S05. On the other hand, if adjustments for all stopping floors have been completed, the processing of the control device C ends.

[0045] In step S05, the adjustment unit 9 selects one stop floor f from the unadjusted stop floors. In subsequent step S06, the adjustment unit 9 acquires a first stop floor position Y1(f) for the stop floor f. In subsequent step S07, the adjustment unit 9 calculates the adjusted distance D*(f) for the stop floor f, the second stop floor position Y2(f), and the lowest-floor-based inter-floor distance H(f). The adjustment unit 9 then completes the adjustment for the stop floor f, and the processing of the control device C proceeds to step S04.

[0046] As described above, the control device C according to the first embodiment includes the linear scale 4, the position detector 5, the car control unit 6, and the adjustment unit 9. The linear scale 4 is provided in the elevator shaft along the travel path of the car 1. The upper end 41 of the linear scale 4 is fixed. Position information within the elevator shaft is provided along the longitudinal direction of the linear scale 4. The position detector 5 is provided in the car 1. The position detector 5 detects the absolute position of the car 1 in the elevator shaft by reading the position information provided on the linear scale 4. The car control unit 6 controls the travel of the car 1 based on the absolute position of the car 1 detected by the position detector 5 from the position information of the linear scale 4. The adjustment unit 9 acquires uppermost end position information Y0 representing the position of the upper end in the elevator shaft. The adjustment unit 9 acquires a first offset value X1, which is position information read by the position detector 5 from the linear scale 4 when the car 1 is located at the floor position of the lowest floor, the stopping floor 72. The adjustment unit 9 calculates the adjusted distance D*(72) by dividing the difference D(72) obtained by subtracting the first offset value X1 from the uppermost end position information Y0 by a preset overall adjustment coefficient F. The adjustment unit 9 calculates the second offset value X2 by subtracting the distance D*(72) from the uppermost end position information Y0. The adjustment unit 9 acquires the first stopping floor position Y1(71), which is position information read by the position detector 5 from the linear scale 4 when the elevator car 1 is located at the floor position of another stopping floor 71 on the stopping floor 72. The adjustment unit 9 calculates the adjusted distance D*(71) by dividing the difference D(71) obtained by subtracting the first stopping floor position Y1(71) from the uppermost end position information Y0 by the overall adjustment coefficient F. The adjustment unit 9 calculates the second stopping floor position Y2(71) as the adjusted stopping position by subtracting the distance D*(71) from the uppermost end position information Y0.

[0047] With this configuration, the control device C does not need to detect a detectable object provided corresponding to the stopping position of each floor, so even in an elevator in which the stopping position of each floor is set based on the reading position of the linear scale 4 provided in the elevator shaft, it is possible to adjust the stopping position of each floor by adjusting the absolute position of the car 1. Furthermore, because the adjustment factors for adjusting the absolute position of the car 1 are clarified, adjustments can be made more efficiently when installing or replacing the elevator or its control device C.

[0048] In addition, the adjustment unit 9 calculates the lowest floor-based floor distance H(71) for the stop floor 71 by subtracting the second offset value X2 from the second stop floor position Y2(71).

[0049] The adjustment unit 9 also adjusts the absolute position of the car 1 using the overall adjustment coefficient F as a parameter adjustable by the worker performing the adjustment work. The adjustment unit 9 also sets the second offset value X2 and the lowest-floor-based inter-floor distance H(71) for the stop floor 71 as parameters adjustable by the worker performing the adjustment work. The adjustment unit 9 back-calculates the second stop floor position Y2(71) so that the difference obtained by subtracting the second offset value X2 from the second stop floor position Y2(71) is the lowest-floor-based inter-floor distance H(71). The adjustment unit 9 back-calculates the distance D*(71) so that the difference obtained by subtracting the distance D*(71) from the top-end position information Y0 is the second stop floor position Y2(71). The adjustment unit 9 reverse-calculates the reading value of the position detector 5 at the first stopping floor position Y1 (71) so that the difference obtained by subtracting the first stopping floor position Y1 (71) from the topmost position information Y0 and dividing the result by the overall adjustment coefficient F becomes the distance D* (71).

[0050] With this configuration, the adjustment factors for adjusting the absolute position of the car 1 become more specific and clear, making adjustments more efficient when installing or replacing the elevator or its control device C. The car control unit 6 may also control the running of the car 1 based on the positional relationship between the read value read from the linear scale 4 by the position detector 5 and the read value of the position corresponding to the first stop position of each stop calculated by the adjustment unit 9.

[0051] Furthermore, the adjustment unit 9 sets the initial value of the overall adjustment coefficient F to 1. With this configuration, it becomes possible to adjust the absolute position of the car 1 with the ideal value at the time of installation of the elevator or its control device C.

[0052] Furthermore, the adjustment unit 9 uses the ratio R obtained by dividing the distance obtained by subtracting the first offset value X1 from the top end position information Y0 by the distance from the floor surface position of the lowest floor to the top end of the elevator shaft as the initial value of the overall adjustment coefficient F. This configuration enables more precise management of the overall adjustment coefficient F.

[0053] The adjustment unit 9 also acquires a first specific point position Z1, which is position information read by the position detector 5 from the linear scale 4 when the car 1 is positioned at a specific point that does not coincide with the floor position of any floor. The adjustment unit 9 calculates an adjusted distance E* for the specific point by subtracting the first specific point position Z1 for the specific point from the uppermost end position information Y0 and dividing the difference E by the overall adjustment coefficient F. The adjustment unit 9 calculates a second specific point position Z2 as the adjusted position of the specific point by subtracting the distance E* for the specific point from the uppermost end position information Y0.

[0054] This configuration makes it possible to adjust the absolute position of the car 1 to any position within the elevator shaft. In addition, the true current position of the car 1 can be known, and the distance to be traveled can be calculated as a highly accurate physical quantity, thereby generating an appropriate speed command value for the car 1 and setting an appropriate door zone.

[0055] Next, an example of the hardware configuration of the control device C will be described with reference to Fig. 4. Fig. 4 is a hardware configuration diagram of the main part of the control device C according to the first embodiment.

[0056] The functions of the control device C may be realized by a processing circuit. The processing circuit includes at least one processor 100 a and at least one memory 100 b. The processing circuit may include at least one dedicated hardware 200 in addition to or in place of the processor 100 a and the memory 100 b.

[0057] When the processing circuit includes a processor 100a and a memory 100b, the functions of the control device C are realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. The program is stored in the memory 100b. The processor 100a realizes the functions of the control device C by reading and executing the program stored in the memory 100b.

[0058] The processor 100a is also called a CPU (Central Processing Unit), processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 100b is composed of non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM.

[0059] Where the processing circuitry comprises dedicated hardware 200, the processing circuitry may be implemented, for example, as a single circuit, multiple circuits, a programmed processor, parallel programmed processors, an ASIC, an FPGA, or a combination thereof.

[0060] Each function of the control device C can be realized by a processing circuit. Alternatively, each function of the control device C can be realized collectively by a processing circuit. Some of the functions of the control device C may be realized by dedicated hardware 200, and the other parts may be realized by software or firmware. In this way, the processing circuit realizes each function of the control device C by dedicated hardware 200, software, firmware, or a combination of these.

[0061] The control device according to the present disclosure can be applied to an elevator.

[0062] DESCRIPTION OF SYMBOLS 1 Car, 2 Rope, 3 Hoist, 4 Linear scale, 41 Upper end, 42 Lower end, 5 Position detector, 6 Car control unit, 71, 72, 73 Stop floor, 8 Memory unit, 9 Adjustment unit, 100a Processor, 100b Memory, 200 Dedicated hardware

Claims

1. A linear scale is provided along a travel path of a car traveling vertically within a hoistway, a fixed end which is one end in the vertical direction is fixed, and position information within the hoistway is provided along the longitudinal direction; a position detector is provided on the car and detects the absolute position of the car in the hoistway by reading the position information provided on the linear scale; a car control unit controls the travel of the car based on the absolute position of the car detected by the position detector from the position information of the linear scale; and an adjustment unit performs adjustment to the absolute position of the car used for control by the car control unit, wherein in adjusting the absolute position of the car, the adjustment unit: obtains fixed side terminal position information which indicates the position of the terminal end on the fixed end side; and obtains a first offset value which is the position information read from the linear scale by the position detector when the car is located at the floor position of the terminal floor on the opposite side of the fixed end; an elevator control device which calculates a first adjusted distance by dividing the difference obtained by subtracting the first offset value from the fixed side terminal position information by a predetermined overall adjustment coefficient; calculates a second offset value by subtracting the first adjusted distance from the fixed side terminal position information; obtains a first stop floor position, which is the position information read from the linear scale by the position detector when the car is located at a floor position of any other stop floor which is a terminal floor on the opposite side of the fixed end; calculates a second adjusted distance for the stop floor by dividing the difference obtained by subtracting the first stop floor position for the stop floor from the fixed side terminal position information by the overall adjustment coefficient; and calculates a second stop floor position as the adjusted stop position for the stop floor by subtracting the second adjusted distance for the stop floor from the fixed side terminal position information.

2. The elevator control device according to claim 1, wherein the adjustment unit adjusts the absolute position of the car by using the overall adjustment coefficient as a parameter that can be adjusted by an operator performing the adjustment work.

3. An elevator control device as described in claim 1 or claim 2, wherein the adjustment unit, in adjusting the absolute position of the car, calculates the inter-floor distance based on the terminal floor on the opposite side of the fixed end for the stop floor by subtracting the second offset value from the second stop floor position for the stop floor.

4. An elevator control device as described in any one of claims 1 to 3, wherein the adjustment unit sets the second offset value and the inter-floor distance based on the terminal floor on the opposite side of the fixed end for the stopping floor as parameters adjustable by an operator performing the adjustment work, and reverse-calculates the read value of the position detector at the first stopping floor position for the stopping floor so that the difference obtained by subtracting the first stopping floor position for the stopping floor from the fixed side terminal position information divided by the overall adjustment coefficient becomes the second adjusted distance for the stopping floor.

5. An elevator control device as described in any one of claims 1 to 4, wherein the adjustment unit sets the initial value of the overall adjustment coefficient to 1.

6. An elevator control device as described in any one of claims 1 to 4, wherein the adjustment unit uses a ratio obtained by dividing a distance obtained by subtracting the first offset value from the fixed side terminal position information by a value preset as a distance from the floor position of the terminal floor on the opposite side of the fixed end to the position of the terminal part on the fixed end side as an initial value of the overall adjustment coefficient.

7. An elevator control device as described in any one of claims 1 to 6, wherein the adjustment unit, in adjusting the absolute position of the car, obtains a first specific point position, which is the position information read from the linear scale by the position detector when the car is located at a specific point that does not coincide with the floor surface position of any floor, calculates a third adjusted distance for the specific point by subtracting the first specific point position for the specific point from the fixed side terminal position information and dividing the difference by the overall adjustment coefficient, and calculates a second specific point position as the adjusted position of the specific point by subtracting the third adjusted distance for the specific point from the fixed side terminal position information.

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