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

Technical Field

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

Background Art

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

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the elevator of Patent Document 1, detection of the first detected object provided at the stop position of each floor is required. Therefore, adjustment of the stop position in this elevator cannot be applied when the stop position of each floor is set based on the reading position of the linear scale, such as when the first detected object is not provided at the stop position of each floor.

[0005] The present disclosure relates to solving such problems. The present disclosure provides an elevator control device capable of adjusting the stop position of each floor even when the stop position of each floor is set based on the reading position of a linear scale provided in the hoistway.

Means for Solving the Problems

[0006] The elevator control device according to this disclosure comprises: a linear scale provided along the travel path of an elevator car traveling vertically within a hoistway, with one end in the vertical direction fixed and position information within the hoistway attached along its longitudinal direction; a position detector provided on the elevator car that detects the absolute position of the elevator car in the hoistway by reading the position information attached to the linear scale; an elevator car control unit that controls the movement of the elevator car based on the absolute position of the elevator car detected by the position detector from the position information on the linear scale; and an adjustment unit that adjusts the absolute position of the elevator car used by the elevator car control unit for control, wherein the adjustment unit acquires fixed-side end position information representing the position of the end on the fixed-end side, and adjusts the position when the elevator car is located at the floor surface position of the terminal floor opposite the fixed end. The position detector obtains a first offset value, which is the position information read from the linear scale, calculates a first adjusted distance by subtracting the first offset value from the fixed end position information and dividing the difference by a preset overall adjustment coefficient, calculates a second offset value by subtracting the first adjusted distance from the fixed end position information, obtains a first stopping floor position, which is the position information read from the linear scale, when the elevator car is positioned at the floor position of any other stopping floor on the opposite end of the terminal floor, calculates a second adjusted distance for the stopping floor by subtracting the first stopping floor position for the stopping floor from the fixed end position information and dividing the difference by the overall adjustment coefficient, and calculates a second stopping floor position as the adjusted stopping position for the stopping floor by subtracting the second adjusted distance for the stopping floor from the fixed end position information. [Effects of the Invention]

[0007] According to the control device described herein, even in elevators where the stopping position of each floor is set based on the reading position of a linear scale installed in the hoistway, the stopping position of each floor can be adjusted. [Brief explanation of the drawing]

[0008] [Figure 1] This is a diagram showing the configuration of an elevator according to Embodiment 1. [Figure 2] This figure illustrates an example of adjusting the absolute position of the elevator car in the control device according to Embodiment 1. [Figure 3] This flowchart shows an example of the operation of the control device according to Embodiment 1. [Figure 4] This is a hardware configuration diagram of the main part of the control device according to Embodiment 1. [Modes for carrying out the invention]

[0009] The embodiments for carrying out the subject matter of this disclosure will be described with reference to the attached drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are simplified or omitted as appropriate. However, the subject matter of this disclosure is not limited to the following embodiments, and any modification of any component of the embodiments or omission of any component of the embodiments is possible without departing from the spirit of this disclosure.

[0010] Embodiment 1. Figure 1 is a diagram showing the configuration of an elevator according to Embodiment 1.

[0011] Elevators are used in buildings with multiple floors. In a building, an elevator shaft is provided. The shaft is a long vertical space spanning multiple floors. An elevator comprises a car 1, a rope 2, and a hoisting machine 3. The car 1 is the device in which passengers ride. The car 1 is located in the elevator shaft. 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 hoisting machine 3 is a device that generates the driving force to move the car 1. The hoisting machine 3 is located at the top or bottom of the elevator shaft. If the elevator's machine room is located above the elevator shaft, the hoisting machine 3 may be located in the machine room. The rope 2 is wound around the hoisting machine 3. The rope 2 is wound around the sheave of the hoisting machine 3. In an elevator, the driving force generated by the hoisting machine 3 causes one side of the rope 2, which is wrapped around the sheave, to be reeled up, so that the elevator car 1, which is supported by the rope 2, travels up and down in the hoistway.

[0012] In an elevator, a control device C is applied to control the operation of the elevator. The control device C comprises a linear scale 4 and a position detector 5.

[0013] The linear scale 4 is positioned in the elevator shaft along the travel path of the elevator car 1. The linear scale 4 is, for example, a long object such as 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 elevator car 1. The linear scale 4 is assigned positional information within the elevator shaft that corresponds to the absolute vertical position of the elevator car 1 within the elevator shaft. The positional information within the elevator shaft is assigned along the longitudinal direction of the linear scale 4 by means of, for example, electromagnetic properties, optical properties, mechanical shape or properties, or geometric patterns on the surface. In this example, the linear scale 4 is installed in a suspension 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 on the opposite side of the fixed end. The linear scale 4 has expansion and contraction properties. The lower end 42, which is the movable end, may be held by an elastic body such as a spring so as to be able to apply tension to the linear scale 4, or it may be held by a sliding bearing or the like. 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 installed on the elevator car 1. The position detector 5 is fixed to the elevator car 1. The position detector 5 is equipped with the function of reading position information attached to the linear scale 4. The position detector 5 moves with the elevator car 1 within the hoistway and reads the position information of the linear scale 4 to determine the absolute position of the elevator car 1 within the hoistway.

[0015] The control device C includes a car control unit 6. The car control unit 6 is mounted on a control panel located, for example, in the upper or lower part of the hoistway, or in the machine room. The car control unit 6 is the part that controls the movement of the car 1. The car control unit 6 controls the movement of the car 1 using the readings obtained by the position detector 5 from the position information attached to the linear scale 4. The car control unit 6 may also apply these readings to a door-open travel protection device and a terminal floor forced deceleration device installed in the elevator.

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

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

[0018] Subsequently, an example of the adjustment of the absolute position of the car 1 will be described using FIG. 2. FIG. 2 is a diagram for explaining an example of the adjustment of the absolute position of the car 1 in the control device C according to Embodiment 1.

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

[0020] First, the adjustment unit 9 acquires the uppermost position information Y0. The uppermost position information Y0 represents the position of the upper end in the elevator shaft. For example, the uppermost position information Y0 represents the position of the terminal end on the upper end 41 side, which is the fixed end side of the linear scale 4. Since the upper end 41 side of the linear scale 4 is the fixed end side, the uppermost position information Y0 is an example of fixed-side terminal position information. The uppermost position information Y0 corresponds to, for example, the position information that the position detector 5 reads from the linear scale 4 when the elevator car 1 is at the upper end of the range in which it can travel in the elevator shaft. The uppermost position information Y0 corresponds to, for example, the position information attached to the fixed end of the linear scale 4. In this example, the position of the terminal end on the upper end 41 side is above the floor level of the top floor, which is the stopping floor 71. Here, the floor position of a certain floor refers to the position where, when the elevator car 1 is located at the floor position of that floor, the height of the floor of the elevator car 1 and the height of the floor of that floor coincide within a range that does not hinder passengers from boarding or alighting from the elevator car 1. This range is, for example, ±10 mm, but is not limited to this. The adjustment unit 9 may acquire the uppermost position information Y0 by reading the value actually read from the linear scale 4 by the position detector 5, or it may acquire the uppermost position information 91 by direct input from an operator performing adjustment work on the absolute position of the elevator car 1. Here, the operator's direct input may be, for example, direct input of the result of actual measurements taken by the operator using a measuring tape or the like.

[0021] Subsequently, the adjustment unit 9 obtains the first offset value X1. The first offset value X1 corresponds to the 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 stop floor 72. Here, since the lower end 42 side of the linear scale 4 is the movable end side opposite to the fixed end, the lowest stop floor 72 is an example of the end floor on the opposite side of the fixed end. The first offset value X1 represents the distance between the floor position of the stop floor 72 and the position of the lower end 42 when the position information 0 is assigned to the lower end 42 of the linear scale 4. The adjustment unit 9 obtains the first offset value X1, for example, based on the reading value actually read by the position detector 5 from the linear scale 4 after the operator has run the car 1 to the floor position of the stop floor 72. The operator runs the car 1 to the floor position of the stop floor 72, for example, by manual operation. The adjustment unit 9 may obtain the first offset value X1 by other methods.

[0022] The adjustment unit 9 performs calculations for adjusting the absolute position of the car 1 using a preset overall adjustment coefficient F. The overall adjustment coefficient F is stored, for example, in the storage unit 8 as a parameter that can be adjusted by an operator or the like. 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 the distance D(72) obtained by subtracting the first offset value X1 from the uppermost position information Y0 by the distance from the floor position of the stop floor 72 to the position of the upper end in the hoistway. Here, the distance from the floor position of the stop floor 72 corresponding to the denominator of the ratio R to the position of the upper end in the hoistway is preset based on building design information or the like. The distance is stored, for example, in the storage unit 8 or the like. The overall adjustment coefficient F may be adjusted to be changed from the initial value by an operator or the like, for example. The overall adjustment coefficient F is used, for example, for adjusting the influence of the 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 uppermost position information Y0. The adjustment unit calculates the distance D*(72) as the adjusted distance by dividing the distance D(72) by the overall adjustment coefficient F. Distance D*(72) is an example of the first adjusted distance. Distance D*(72) corresponds to the true distance from the floor position of the stopping floor 72 to the position of the upper end in the elevator shaft, when the settings of the overall adjustment coefficient F and other factors are appropriate.

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

[0025] Next, the adjustment unit 9 makes adjustments to the other stopping floors besides the lowest stopping floor 72. For example, the adjustment unit 9 makes adjustments to the uppermost stopping floor 71.

[0026] The adjustment unit 9 acquires the first stopping floor position Y1(71) for the stopping floor 71. The first stopping floor position Y1(71) corresponds to the position information that the position detector 5 reads from the linear scale 4 when the elevator car 1 is positioned on the floor surface of the stopping floor 71. For example, the adjustment unit 9 acquires the first stopping floor position Y1(71) by the reading actually read by the position detector 5 from the linear scale 4 after an operator has driven the elevator car 1 to the floor surface of the stopping floor 71. The operator drives the elevator car 1 to the floor surface of the stopping floor 71 by, for example, manual operation. The adjustment unit 9 may 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 stopping floor position Y1(71) from the uppermost position information Y0. The adjustment unit calculates the adjusted distance D*(71) by dividing the distance D(71) by the overall adjustment coefficient F. Distance D*(71) is an example of the second adjusted distance. Distance D*(71) corresponds to the true distance from the floor position of the stopping floor 71 to the position of the upper end in the elevator shaft, when the settings of the overall adjustment coefficient F and other factors are appropriate.

[0028] The adjustment unit 9 calculates the second stopping floor position Y2(71) for stopping floor 71 by subtracting the distance D*(71) from the uppermost position information Y0. The second stopping floor position Y2(71) is the stopping position of the elevator car 1 for stopping floor 71 after adjustment by the adjustment unit 9.

[0029] The adjustment unit 9 calculates the floor-to-floor distance H(71) for the stopping floor 71 based on the lowest floor by subtracting the second offset value X2 from the second stopping floor position Y2(71). The floor-to-floor distance H(71) is the floor-to-floor distance between the stopping floor 71 and the lowest floor, which is the stopping floor 72, after adjustment by the adjustment unit 9.

[0030] Next, the adjustment unit 9 makes adjustments to the other stopping floors, such as the lowest and highest stopping floors, which are stopping floors 72 and 71. The adjustment unit 9 also makes adjustments to, for example, the intermediate stopping floor 73.

[0031] The adjustment unit 9 acquires the first stopping floor position Y1(73) for the stopping floor 73. The first stopping floor position Y1(73) corresponds to the position information that the position detector 5 reads from the linear scale 4 when the elevator car 1 is positioned on the floor surface of the stopping floor 73. For example, the adjustment unit 9 acquires the first stopping floor position Y1(73) by the reading actually read by the position detector 5 from the linear scale 4 after an operator has driven the elevator car 1 to the floor surface of the stopping floor 73. The operator drives the elevator car 1 to the floor surface of the stopping floor 73 by, for example, manual operation. The adjustment unit 9 may 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 stopping floor position Y1(73) from the uppermost position information Y0. The adjustment unit calculates the adjusted distance D*(73) by dividing the distance D(73) by the overall adjustment coefficient F. Distance D*(73) is an example of the second adjusted distance. Distance D*(73) corresponds to the true distance from the floor position of the stopping floor 73 to the position of the upper end in the elevator shaft, when the settings of the overall adjustment coefficient F and other factors are appropriate.

[0033] The adjustment unit 9 calculates the second stopping floor position Y2(73) for stopping floor 73 by subtracting the distance D*(73) from the uppermost position information Y0. The second stopping floor position Y2(73) is the stopping position of the elevator car 1 for stopping floor 73 after adjustment by the adjustment unit 9.

[0034] The adjustment unit 9 calculates the floor-to-floor distance H(73) for the stopping floor 73 based on the lowest floor by subtracting the second offset value X2 from the second stopping floor position Y2(73). The floor-to-floor distance H(73) is the floor-to-floor distance between the stopping floor 73 and the lowest floor, which is the stopping floor 72, after adjustment by the adjustment unit 9.

[0035] If other intermediate floors are set as stopping floors for the elevator, the adjustment unit 9 performs the same adjustments for those other stopping floors as well.

[0036] The operator performing the adjustment work may adjust the absolute position of the elevator car 1 by using adjustable parameters such as the second offset value X2, the floor-to-floor distance H(71) relative to the lowest floor, or the floor-to-floor distance H(73) relative to the lowest floor. The operator may adjust these parameters instead of adjusting the overall adjustment coefficient F, or may do so in conjunction with the adjustment of the overall adjustment coefficient F. For example, when the overall adjustment coefficient F, the second offset value X2, and the floor-to-floor distance H(71) relative to the lowest floor are adjusted as parameters, the adjustment unit 9 calculates the reading of the position detector 5 at the floor surface position of the stopping floor 71 based on these parameters. At this time, the adjustment unit 9 calculates the second stopping floor position Y2(71) in reverse, for example, such that the difference obtained by subtracting the second offset value X2 from the second stopping floor position Y2(71) becomes the floor-to-floor distance H(71) relative to the lowest floor. The adjustment unit 9 calculates the distance D*(71) in reverse so that the difference obtained by subtracting the distance D*(71) from the uppermost position information Y0 becomes the second stopping floor position Y2(71). The adjustment unit 9 calculates the reading of the linear scale 4 at the position corresponding to the first stopping floor position Y1(71) in reverse so that the value obtained by dividing the difference obtained by subtracting the first stopping floor position Y1(71) from the uppermost position information Y0 by the overall adjustment coefficient F becomes the distance D*(71). At this time, the adjustment unit 9 may use values ​​obtained or calculated during the previous adjustment as the position and distance information used in the reverse calculation. The position and distance information used in the reverse calculation is stored, for example, in the storage unit 8.

[0037] The adjustment unit 9 performs adjustments for specific points that do not coincide with any floor level position, 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 also be, for example, a position within the elevator shaft that serves as a reference for acceleration or deceleration of the elevator car 1. The specific point may also be, for example, any other arbitrary position between floors, above the top floor, or below the bottom floor. The specific point may also be, for example, the current position of the elevator car 1.

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

[0039] The adjustment unit 9 subtracts the position of the first specific point Z1 for the specific point to be adjusted from the uppermost position information Y0 to calculate the distance E for the said specific point. The adjustment unit then divides the distance E by the overall adjustment coefficient F to calculate the distance E* as the adjusted distance. Distance E* is an example of the third adjusted distance.

[0040] The adjustment unit 9 calculates the second specific point position Z2 for the specific point by subtracting the distance E* to the specific point to be adjusted from the uppermost 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 elevator car control unit 6 controls the movement of the elevator 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*. The elevator car control unit 6 controls the movement of the elevator car 1 based, for example, on the positional relationship between the second specific point position Z2 and the second stopping floor position Y2 of each stopping floor with respect to the current position of the elevator car 1.

[0042] Next, we will explain an example of the operation of the control device C using Figure 3. Figure 3 is a flowchart showing an example of the operation of the control device C according to Embodiment 1.

[0043] In step S01, the adjustment unit 9 acquires the uppermost position information Y0. In the following step S02, the adjustment unit 9 acquires the first offset value X1. In the following step S03, the adjustment unit 9 calculates the adjusted distance D*(72) and the second offset value X2. After that, 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 unadjusted stopping floors, the control device C proceeds to step S05. On the other hand, if the adjustment for all stopping floors is complete, the control device C terminates.

[0045] In step S05, the adjustment unit 9 selects one stop floor f from among the unadjusted stop floors. In the following step S06, the adjustment unit 9 obtains the first stop floor position Y1(f) for stop floor f. In the following step S07, the adjustment unit 9 calculates the adjusted distance D*(f), the second stop floor position Y2(f), and the inter-floor distance H(f) relative to the lowest floor for stop floor f. After that, the adjustment unit 9 completes the adjustment for stop floor f, and the control device C proceeds to step S04.

[0046] As described above, the control device C according to Embodiment 1 comprises a linear scale 4, a position detector 5, a car control unit 6, and an adjustment unit 9. The linear scale 4 is installed in the hoistway along the travel path of the car 1. The upper end 41 of the linear scale 4 is fixed. Position information within the hoistway is attached to the linear scale 4 along its longitudinal direction. The position detector 5 is installed on the car 1. The position detector 5 detects the absolute position of the car 1 in the hoistway by reading the position information attached to the linear scale 4. The car control unit 6 controls the movement 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 position information Y0, which represents the position of the upper end in the hoistway. 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 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 position information Y0. The adjustment unit 9 acquires the first stop 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 positioned at the floor position of another stop floor 71 other than the stop floor 72. The adjustment unit 9 calculates the adjusted distance D*(71) by dividing the difference D(71), obtained by subtracting the first stop floor position Y1(71) from the uppermost position information Y0, by the overall adjustment coefficient F. The adjustment unit 9 calculates the second stop floor position Y2(71) as the adjusted stop position by subtracting the distance D*(71) from the uppermost position information Y0.

[0047] With this configuration, the control device C does not require detection of objects to be detected corresponding to the stopping positions on each floor. Therefore, even in elevators where the stopping positions on each floor are set based on the reading position of a linear scale 4 installed in the hoistway, it becomes possible to adjust the stopping positions on each floor by adjusting the absolute position of the elevator car 1. Furthermore, since the adjustment elements for adjusting the absolute position of the elevator car 1 become clearer, adjustments during installation and replacement of the elevator or its control device C become more efficient.

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

[0049] Furthermore, the adjustment unit 9 adjusts the absolute position of the elevator car 1, using the overall adjustment coefficient F as a parameter that can be adjusted by the operator performing the adjustment work. Furthermore, the adjustment unit 9 makes the second offset value X2 and the floor-to-floor distance H(71) based on the lowest floor for the stopping floor 71 parameters that can be adjusted by the operator performing the adjustment work. The adjustment unit 9 calculates the second stopping floor position Y2(71) in reverse so that the difference obtained by subtracting the second offset value X2 from the second stopping floor position Y2(71) becomes the floor-to-floor distance H(71) based on the lowest floor. The adjustment unit 9 calculates the distance D*(71) in reverse so that the difference obtained by subtracting the distance D*(71) from the uppermost position information Y0 becomes the second stopping floor position Y2(71). The adjustment unit 9 calculates the reading of the position detector 5 at the first stopping floor position Y1(71) in reverse so that the value obtained by dividing the difference obtained by subtracting the first stopping floor position Y1(71) from the uppermost position information Y0 by the overall adjustment coefficient F becomes the distance D*(71).

[0050] This configuration makes the adjustment elements for adjusting the absolute position of the elevator car 1 more specific and clear, thus making adjustments more efficient during installation and replacement of the elevator or its control device C. The elevator car control unit 6 may also control the movement of the elevator car 1 based on the positional relationship between the readings read by the position detector 5 from the linear scale 4 and the readings of the position corresponding to the first stop floor position of each stop floor calculated by the adjustment unit 9.

[0051] Furthermore, the adjustment unit 9 sets the initial value of the overall adjustment coefficient F to 1. This configuration makes it possible to adjust the absolute position of the elevator car 1, with the ideal value being the position 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 subtracting the first offset value X1 from the uppermost position information Y0 and dividing the result by the distance from the floor surface of the lowest floor to the upper end of the elevator shaft as the initial value of the overall adjustment coefficient F. This configuration enables more precise control of the overall adjustment coefficient F.

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

[0054] This configuration allows for adjustment of the absolute position of elevator car 1 at any point within the elevator shaft. Furthermore, knowing the true current position of elevator car 1 allows for the determination of the distance to be traveled with high precision, enabling the generation of appropriate speed command values ​​for elevator car 1 and the setting of appropriate door zones.

[0055] Next, we will explain an example of the hardware configuration of control device C using Figure 4. Figure 4 is a hardware configuration diagram of the main part of the control device C according to Embodiment 1.

[0056] Each function of the control device C can be realized by a processing circuit. The processing circuit comprises at least one processor 100a and at least one memory 100b. The processing circuit may also include at least one dedicated hardware 200 together with the processor 100a and memory 100b, or as a substitute for them.

[0057] When the processing circuit comprises a processor 100a and a memory 100b, each function of the control device C is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. This program is stored in the memory 100b. The processor 100a realizes each function 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] If the processing circuit includes dedicated hardware 200, the processing circuit may be implemented as, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.

[0060] Each function of the control device C can be implemented by a separate processing circuit. Alternatively, each function of the control device C can be implemented collectively by a processing circuit. For each function of the control device C, some may be implemented by dedicated hardware 200, while others are implemented by software or firmware. Thus, the processing circuit implements each function of the control device C using dedicated hardware 200, software, firmware, or a combination thereof. [Industrial applicability]

[0061] The control device described herein is applicable to elevators. [Explanation of symbols]

[0062] 1 elevator car, 2 rope, 3 hoisting machine, 4 linear scale, 41 upper end, 42 lower end, 5 position detector, 6 elevator car control unit, 71, 72, 73 stopping floors, 8 memory unit, 9 adjustment unit, 100a processor, 100b memory, 200 dedicated hardware

Claims

1. A linear scale is provided along the travel path of a car that travels vertically within the elevator shaft, with one end in the vertical direction fixed, and positional information within the elevator shaft attached along the longitudinal direction. A position detector is provided in the elevator car and detects the absolute position of the elevator car in the elevator shaft by reading the position information attached to the linear scale, A car control unit controls the movement of the car based on the absolute position of the car detected by the position detector from the position information of the linear scale, The elevator car control unit includes an adjustment unit that adjusts the absolute position of the elevator car used for control, Equipped with, The adjustment unit, in adjusting the absolute position of the elevator car, The fixed end position information representing the position of the terminal portion on the fixed end side is obtained, When the elevator car is positioned on the floor surface of the terminal floor opposite the fixed end, the position detector obtains a first offset value, which is the position information read from the linear scale. The first adjusted distance is calculated by dividing the difference obtained by subtracting the first offset value from the fixed end position information by a preset overall adjustment coefficient. The second offset value is calculated by subtracting the first adjusted distance from the fixed end position information. When the elevator car is positioned at the floor level of any other stopping floor on the terminal floor opposite the fixed end, the position detector obtains the first stopping floor position, which is the position information read from the linear scale. The second adjusted distance for the stopping floor is calculated by dividing the difference obtained by subtracting the first stopping floor position for the stopping floor from the fixed-side terminal position information by the overall adjustment coefficient. The second stop floor position is calculated as the adjusted stop position for the stop floor by subtracting the second adjusted distance for the stop floor from the fixed end position information. Elevator control unit.

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

3. The adjustment unit, in adjusting the absolute position of the elevator car, By subtracting the second offset value from the second stopping floor position for the aforementioned stopping floor, the inter-floor distance relative to the terminal floor on the opposite side of the fixed end for the aforementioned stopping floor is calculated. The elevator control device according to claim 1 or claim 2.

4. The adjustment unit is, The second offset value and the inter-floor distance relative to the terminal floor on the opposite side of the fixed end for the stopping floor are parameters that can be adjusted by the worker performing the adjustment work. The reading of the position detector at the first stop floor position for the stop floor is calculated in reverse, such that the difference obtained by subtracting the first stop floor position for the stop floor from the fixed end position information is divided by the overall adjustment coefficient, and the result is the second adjusted distance for the stop floor. The elevator control device according to claim 1 or claim 2.

5. The adjustment unit sets the initial value of the overall adjustment coefficient to 1. The elevator control device according to claim 1 or claim 2.

6. The adjustment unit uses the ratio obtained by subtracting the first offset value from the fixed end position information, and dividing the resulting distance by a predetermined value representing the distance from the floor position of the terminal floor on the opposite side of the fixed end to the position of the terminal end on the fixed end side, as the initial value of the overall adjustment coefficient. The elevator control device according to claim 1 or claim 2.

7. The adjustment unit, in adjusting the absolute position of the elevator car, When the elevator car is located at a specific point that does not coincide with the floor position of any floor, the position detector obtains the first specific point position, which is the position information read from the linear scale. The third adjusted distance for the specified point is calculated by dividing the difference obtained by subtracting the first specified point position for the specified point from the fixed end position information by the overall adjustment coefficient. By subtracting the third adjusted distance for the specified point from the fixed end position information, the second specified point position is calculated as the adjusted position for the specified point. The elevator control device according to claim 1 or claim 2.

Images