Method and program for deriving installation pattern

Abstract

To simplify the work required for balancing the elevator car.SOLUTION: A derivation method is a method for deriving an installation pattern of a balance weight, and includes a calculation step and a derivation step. Specifically, positions in the car that can be candidates for installing the balance weight are set as candidate installation positions. In the calculation step, all combination patterns or part of them that can be considered when selecting at least one position from the candidate installation positions are set as first patterns, and for each first pattern, a moment that occurs in the car when the balance weight is installed at the selected candidate installation position is obtained as a generated moment. In the derivation step, one of the first patterns in which the error between the generated moment calculated in the calculation step and the target moment for balance adjustment is within an allowable range is derived as an installation pattern.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a technique for adjusting the balance of an elevator car. [Background technology]

[0002] 2. Description of the Related Art As a technique for adjusting the balance (inclination of the car part, etc.) of an elevator car, a technique for adjusting by attaching a balance weight to the car part has been conventionally used (see, for example, Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-153013 A [Patent Document 2] JP 2013-056718 A [Patent Document 3] JP 2013-173609 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, however, workers had to first attach the balance weight to a position determined based on their own experience, then measure the balance (inclination of the car, etc.) and adjust the position of the balance weight based on the measurement results, repeatedly doing this until they found the appropriate position for the balance weight, which forced workers to do tedious work.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to simplify the work required for balancing an elevator car. [Means for solving the problem]

[0006] The derivation method according to the present invention is a method for deriving an installation pattern of a balance weight that generates a target moment for balance adjustment in a car part of an elevator, and includes a calculation step and a derivation step. Specifically, positions in the car part that can be candidates for attaching the balance weight are set as candidate attachment positions. In the calculation step, all combination patterns or some of them that can be considered when selecting at least one position from the candidate attachment positions are set as first patterns, and for each first pattern, a moment that is generated in the car part when a balance weight is attached to the candidate attachment position selected there is obtained as a generated moment. In the derivation step, a first pattern among the first patterns in which the error between the generated moment calculated in the calculation step and the target moment is within an allowable range is derived as an installation pattern (mode 1).

[0007] According to the above derivation method, it is possible to easily derive an installation pattern for balance adjustment in which the error from the target moment falls within an allowable range.

[0008] Furthermore, when an operator adjusts the balance of the cage, the operator need only perform the simple task of attaching balance weights to the cage in accordance with the derived installation pattern. With just this simple task, it becomes possible to generate a moment in the cage that brings the error from the target moment within an acceptable range.

[0009] The derivation method according to the above-mentioned aspect 1 may have the following configuration (aspect 2). Specifically, a position that can be a candidate for attachment within a two-dimensional plane set horizontally at a specific height position may be set as the candidate attachment position. Furthermore, the two-dimensional plane may be divided into at least two regions, and for each region, all combination patterns that can be considered when selecting at least one position from the candidate attachment positions included in that region or some of them may be set as the second pattern, including the case where none are selected. Then, the calculation step and the derivation step may be performed by taking out the second patterns one by one from the divided regions and combining them as the first pattern.

[0010] According to the above-mentioned second aspect, it becomes possible to efficiently set, as the first pattern, a combination pattern in which the installation positions of the balance weights are distributed among a plurality of divided regions.

[0011] In the derivation method according to the above aspect 2, for each of the above regions, all combination patterns or some of the combination patterns that are possible when selecting only adjacent candidate attachment positions that are grouped together from among the candidate attachment positions included in the region may be set as the second pattern, including the case where none of the combination patterns are selected (aspect 3).

[0012] According to the above-mentioned aspect 3, only the combination pattern in which the mounting candidate positions are grouped together in each region is set as the second pattern, so that in the derived installation pattern, the mounting candidate positions appear in a grouped state in each region (or there are no mounting candidate positions at all). Therefore, when the worker attaches the balance weights according to the installation pattern, the worker can attach the balance weights in a grouped location, which makes the work easier for the worker.

[0013] Furthermore, by setting only the combination patterns that are grouped together in this way as the second pattern, the number of first patterns (combinations of the second patterns taken one by one from each of the divided regions) can be reduced, and as a result, the amount of calculation in the calculation step can be reduced. On the other hand, although the number of first patterns is limited, combination patterns in which the installation positions of the balance weights are distributed among the divided regions are set as the first patterns, so that the first patterns tend to include those in which the error from the target moment falls within the allowable range.

[0014] The derivation method according to the above-mentioned aspect 2 or 3 may further include a first receiving step and a resetting step (aspect 4). Specifically, in the first receiving step, when an uninstallable position where the balance weight cannot be installed is specified from among the candidate mounting positions, the designation of the uninstallable position may be accepted. Then, in the resetting step, when the designation of the uninstallable position is accepted in the first receiving step, the remaining combination patterns excluding the second patterns including the uninstallable position may be reset as new second patterns in the area including the uninstallable position among the divided areas.

[0015] According to the above aspect 5, even if an installation impossible position is included among the already set candidate mounting positions, by specifying the position, the remaining combination pattern excluding the installation impossible position can be reset as a new second pattern, and the installation pattern can be derived using the new second pattern.

[0016] The derivation method according to any one of the above aspects 2 to 4 may have the following configuration (Aspect 5). Specifically, the car section may include a car and a car frame supporting the car. The car frame may include two connecting beams arranged parallel to each other on the bottom side of the car. The two-dimensional plane may be set to include the two connecting beams, and positions within the two-dimensional plane that may be candidates for attaching the balance weight to the two connecting beams may be set as candidate attachment positions.

[0017] In the derivation method according to any one of the above aspects 1 to 5, in the derivation step, if multiple first patterns appear in which the error from the target moment is within the allowable range, the installation pattern that minimizes the total weight of the attached balance weights may be derived from the multiple first patterns (aspect 6).

[0018] According to the above-mentioned sixth aspect, it becomes possible to efficiently achieve balance adjustment of the car part with as small a total weight as possible.

[0019] In the derivation method according to any one of the above aspects 1 to 6, the calculation step and the derivation step may be executed in order from the first pattern having the smallest number of candidate mounting positions selected therein, and repeated until an installation pattern can be derived in the derivation step (aspect 7).

[0020] According to the above-mentioned seventh aspect, it is possible to search for an installation pattern in order from the first pattern having the smallest number of mounting candidate positions, and when a pattern is found, it is possible to terminate the derivation of the installation pattern at that point. Therefore, it is possible to reduce the amount of calculation required to derive the installation pattern. Moreover, it is possible to efficiently achieve the balance adjustment of the car part with the smallest possible total weight.

[0021] The derivation method according to any one of the above aspects 1 to 7 may further include a second receiving step (Aspect 8). Specifically, when an upper limit value for the number of balance weights to be used in balance adjustment is specified in the second receiving step, the specification of the upper limit value may be accepted. Then, when the specification of the upper limit value is accepted in the second receiving step, the calculation step and the derivation step may be executed for the first patterns in which the number of mounting candidate positions selected therein is equal to or less than the upper limit value.

[0022] According to the above-mentioned eighth aspect, by specifying the number of balance weights prepared by the worker for balance adjustment as an upper limit value, it becomes possible to derive an installation pattern within the range up to the upper limit value.

[0023] The derivation program according to the present invention is a program for deriving an installation pattern of a balance weight that generates a target moment for balance adjustment in a car of an elevator, and causes a computer to execute a calculation step and a derivation step. Specifically, positions in the car that can be candidates for attaching the balance weight are set as candidate attachment positions. In the calculation step, all combination patterns or some of them that can be considered when selecting at least one position from the candidate attachment positions are set as first patterns, and for each first pattern, the computer is caused to calculate, as a generated moment, a moment that is generated in the car when a balance weight is attached to the selected candidate attachment position. In the derivation step, the computer is caused to derive, from among the first patterns, a pattern in which the error between the generated moment calculated in the calculation step and the target moment is within an allowable range, as an installation pattern. Effect of the Invention

[0024] According to the present invention, it is possible to simplify the work required for balancing the cage. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a front view illustrating the configuration of an elevator car section. [Diagram 2] FIG. 2 is a perspective view showing a main body portion of the car frame. [Diagram 3] FIG. 4 is a conceptual diagram showing the balance measurement unit as viewed from the Z-axis direction. [Figure 4] 11 is a graph showing the relationship between the moment and the distance to the guide rail. [Diagram 5] FIG. 11 is a conceptual diagram illustrating a method for setting mounting candidate positions. [Figure 6] FIG. 11 is a conceptual diagram showing a second pattern used in the embodiment. [Figure 7] 10 is a flowchart showing a method for deriving an installation pattern according to the embodiment. [Figure 8] 13 is a flowchart showing a method of deriving an installation pattern according to a first modified example. [Figure 9] 13 is a flowchart showing a method of deriving an installation pattern according to a second modified example. [Figure 10] 13 is a flowchart showing a method of deriving an installation pattern according to a third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] [1] Implementation Example [1-1] Elevator configuration <Cage configuration> Fig. 1 is a front view illustrating the configuration of an elevator car section 1. In the following, the horizontal direction from left to right on the paper surface of this figure is defined as the X-axis direction, and the horizontal direction perpendicular to the paper surface of this figure and toward this paper surface is defined as the Y-axis direction. The upward direction perpendicular to both the X-axis direction and the Y-axis direction (vertical upward direction) is defined as the Z-axis direction. As shown in Fig. 1, the elevator car section 1 includes a passenger car 11 that accommodates passengers, and a car frame 12 that installs the passenger car 11 so that it can rise and fall relative to two guide rails 2 on the left and right that extend in the Z-axis direction.

[0027] The car frame 12 includes a main body portion 121 that supports the car 11, and four holding portions 122 that hold the main body portion 121 on the two guide rails 2 in a state in which the main body portion 121 can be raised and lowered.

[0028] Fig. 2 is a perspective view showing the main body 121 of the car frame 12. As shown in Fig. 1 and Fig. 2, the main body 121 includes a bottom frame 121A that supports the car 11 from the bottom side, two side frame 121B arranged along the guide rail 2 on the left and right side sides of the car 11, and a top frame 121C arranged on the top side of the car 11, and these frame parts are firmly connected. In addition, the bottom frame 121A includes a main beam Bm1 extending in the X-axis direction near the center on the bottom side of the car 11, and two connecting beams Bm2 extending in the X-axis direction and arranged in parallel at positions in front and behind the main beam Bm1.

[0029] Each of the two guide rails 2 is a rail formed so that its cross section is T-shaped (see FIG. 3), and is installed with the parts corresponding to the legs of the T (hereinafter referred to as "legs 21") facing inward (see FIG. 1). Each of the holding parts 122 is composed of one roller 122A that contacts the tip surface of the leg 21 of the guide rail 2, and two rollers 122B that sandwich the leg 21 of the guide rail 2 from the front and rear (see FIG. 1).

[0030] <Balance measurement section configuration> The car section 1 described above is provided with a balance measuring section 3 that measures the balance (inclination) of the car section 1 (see FIG. 1).

[0031] 3 is a conceptual diagram showing the balance measurement unit 3 as viewed from the Z-axis direction. As shown in this figure, the balance measurement unit 3 includes a sensor 31 (such as a laser sensor) that measures the distance Lx in the X-axis direction to the tip surface of the leg 21 of the guide rail 2, and a sensor 32 (such as a laser sensor) that measures the distance Ly in the Y-axis direction to the front surface (or the rear surface) of the leg 21 of the guide rail 2.

[0032] Measurement of the distances Lx and Ly by the balance measurement unit 3 makes it possible to capture a change in the balance (tilt) of the car section 1 as a change in the distances Lx and Ly. Specifically, the distances Lx and Ly when the car section 1 is most balanced are measured by the sensors 31 and 32, and the distances Lx and Ly at that time are set as reference distances Lx0 and Ly0, so that a change in the balance (tilt) of the car section 1 can be captured as a change (deviation) in the distances Lx and Ly from the reference distances Lx0 and Ly0.

[0033] <Balance weight configuration> When the balance of the car section 1 is adjusted based on the measurement results of the balance measurement section 3, in this embodiment, balance weights are attached to the two connecting beams Bm2 described above.

[0034] Conventionally, workers had to first attach the balance weight to a position determined based on their own experience, then measure the balance (tilt of the car 1) and adjust the position of the balance weight based on the measurement results, repeatedly doing this until they found the appropriate position for the balance weight. This forced workers to do tedious work.

[0035] In this embodiment, therefore, a balance weight installation pattern Sp is derived using the method and program described below, and balance adjustment can be performed by a simple task of attaching the balance weights according to the installation pattern Sp. This makes it possible to simplify the tasks required for balance adjustment of the car section 1.

[0036] [1-2] Method and program for deriving installation patterns <Advance preparation (part 1)> As a first preparation, a target moment Mp to be generated in the car section 1 during balance adjustment is derived. As an example, the target moment Mp for balance adjustment can be derived as follows.

[0037] First, the floor surface inside the car 11 is considered as an XY coordinate plane (a two-dimensional plane with the center of the floor surface as the origin) with the above-mentioned X-axis and Y-axis directions as coordinate axes, and test weights are sequentially placed at three points on the X-axis in the XY coordinate plane (origin X0, positive position X1, negative position X2). Then, the moment Mty around the Y-axis generated at each point by the test weights is calculated. Also, the balance measuring unit 3 measures the distance Lx in the X-axis direction when the test weights are placed at each point.

[0038] FIG. 4(A) is a graph Gs showing the relationship between the moment Mty about the Y-axis obtained by the above-mentioned method and the distance Lx in the X-axis direction. Such a graph Gs is obtained by changing the position of the car 11. FIG. 4(B) shows a case where the car 11 is moved to three positions, the lowest level, the middle level, and the top level, and the above-mentioned graph Gs is obtained at each position. In FIG. 4(B), the graphs Gs at the three positions of the lowest level, the middle level, and the top level are shown as graphs Gs1, Gs2, and Gs3, respectively. As shown in this figure, even if the moment Mty is the same value, the distance Lx may change depending on the position of the car 11 due to the influence of a cable connected to the car 11, etc.

[0039] Next, for the distance Lx shown by each of the three graphs Gs1 to Gs3 in Fig. 4B, the sum of squares of deviations dLx1 to dLx3 (errors) from the reference distance Lx0 when the moment Mty is a certain value My is considered. Then, the value of the moment Mty when the sum of squares is minimum is derived as the target moment Mpy about the Y axis required for balance adjustment.

[0040] Furthermore, test weights are placed in sequence at three points on the Y axis in the XY coordinate plane (origin Y0, positive position Y1, and negative position Y2), and the target moment Mpx about the X axis required for balance adjustment is derived in a similar manner.

[0041] Specifically, the moment Mtx around the X-axis generated at each point by the test weight is calculated, and the balance measuring unit 3 measures the distance Ly in the Y-axis direction when the test weight is placed at each point, thereby obtaining a graph Gt showing the relationship between the moment Mtx around the X-axis and the distance Ly in the Y-axis direction. Furthermore, the car 11 is moved to three positions, the bottom floor, the middle floor, and the top floor, and the above graph Gt is obtained at each position (graphs Gt1 to Gt3. See FIG. 4(B)).

[0042] Next, for the distances Ly shown by the three graphs Gt1 to Gt3, the sum of squares of deviations dLy1 to dLy3 (errors) from a reference distance Ly0 when the moment Mtx is at a certain value Mx is considered. Then, the value of the moment Mtx when the sum of squares is minimum is derived as the target moment Mpx about the X-axis required for balance adjustment.

[0043] <Advance preparation (part 2)> As a second advance preparation, positions in the car section 1 that can be candidates for attaching the balance weight are set as candidate attachment positions Pd. In this embodiment, a case is considered in which the balance weight is attached to two connecting beams Bm2. In this case, the candidate attachment positions Pd can be set as follows.

[0044] First, the XY coordinate plane (a two-dimensional plane with the center of the floor as the origin) used in the first advance preparation is moved downward to set the XY coordinate plane at a specific height position that will include the two connecting beams Bm2. Note that although there is a difference in position in the Z-axis direction between the XY coordinate plane set here and the XY coordinate plane used in the first advance preparation, the difference is slight, so they may be regarded as the same two-dimensional plane.

[0045] Then, positions on the XY coordinate plane that can be candidates for attaching the balance weights to the two connecting beams Bm2 are set as candidate attachment positions Pd.

[0046] Fig. 5 is a conceptual diagram illustrating a method for setting the attachment candidate position Pd for the connecting beam Bm2. In the example of Fig. 5, the area occupied by each connecting beam Bm2 extending in the X-axis direction in the XY coordinate plane is divided into multiple elements Rc (sections of the same shape (rectangle) and size), and the center position of each element Rc is set as the attachment candidate position Pd.

[0047] In this case, the mounting candidate positions Pd are set at equal intervals in the X-axis direction, and the X-coordinate Pdx of the mounting candidate positions Pd is expressed as |Pdx|=Wc×(j-0.5). Here, Wc represents the width (element width) of the element Rc in the X-axis direction, and j represents a natural number (j=1, 2, . . .). The Y-coordinate Pdy of the mounting candidate positions Pd is expressed as Pdy=Yc1(>0), Yc2(<0) corresponding to the two connecting beams Bm2, respectively. Note that the example of FIG. 5 shows a case where the area occupied by each connecting beam Bm2 is divided into 20 elements Rc, that is, 20 mounting candidate positions Pd are set at equal intervals in the X-axis direction.

[0048] Furthermore, in this embodiment, a part of combination patterns that can be considered when at least one position is selected from the mounting candidate positions Pd is set as a first pattern Sc1. This first pattern Sc1 is a combination pattern used in a derivation method described later, and is a combination pattern that can become a mounting pattern Sp for balance adjustment. Specifically, the first pattern Sc1 is set as follows.

[0049] First, the XY coordinate plane (two-dimensional plane) is divided into four regions Qr (regions Qr1 to Qr4 corresponding to the first to fourth quadrants around the origin) with the X-axis and Y-axis as boundaries (see FIG. 5). Then, for each region Qr, some of the combination patterns that can be considered when at least one position is selected from the mounting candidate positions Pd included in that region Qr, including the case where none are selected, are set as a second pattern Sc2.

[0050] More specifically, for each region Qr, all possible combination patterns are set as the second pattern Sc2 when only adjacent candidate mounting positions Pd grouped together are selected from among the candidate mounting positions Pd included in the region Qr (including the case where only one candidate mounting position Pd is selected), including the case where none is selected. FIG. 6 is a conceptual diagram showing the second pattern Sc2 used in this embodiment. FIG. 6 shows a case where 56 second patterns Sc2 are set for 10 candidate mounting positions Pd included in each region Qr, including the case where none is selected. Note that in FIG. 6, which candidate mounting positions Pd are selected in each combination pattern are shown by hatching the elements Rc corresponding to the selected candidate mounting positions Pd.

[0051] Moreover, by associating 10 bits with the 10 candidate attachment positions Pd included in each region Qr and arranging the 10 bits in order from the one corresponding to the candidate attachment position Pd closest to the Y axis, the 56 second patterns Sc2 described above can be expressed as a bit string Cn (n is an index for distinguishing the 56 bit strings; n=1, 2, . . . , 56) consisting of 10 bits. Here, when the corresponding candidate attachment position Pd is selected, a value of "1" is assigned to each bit, and when it is not selected, a value of "0" is assigned to each bit.

[0052] By setting the second pattern Sc2 in this way, it is possible to set the first pattern Sc1 by taking one second pattern Sc2 (any of the 56 second patterns Sc2) from each of the four divided regions Qr1 to Qr4 and combining them. This makes it possible to efficiently set a combination pattern in which the installation positions of the balance weights are distributed among the four divided regions Qr1 to Qr4 as the first pattern Sc1.

[0053] <How to derive the installation pattern> After carrying out the above-mentioned advance preparation, in this embodiment, an installation pattern Sp of the balance weights for generating the target moment Mp obtained in the advance preparation in the car section 1 of the elevator is derived. Here, the installation pattern Sp represents the positional relationship (positional relationship in the XY coordinate plane) of the balance weights that can generate the target moment Mp in the car section 1 of the elevator. In this embodiment, such a positional relationship is extracted from the combination pattern (first pattern Sc1) of the mounting candidate positions Pd set in the advance preparation. A method for deriving the installation pattern Sp will be specifically described below.

[0054] 7 is a flowchart showing a method for deriving an installation pattern Sp according to this embodiment. The derivation method according to this embodiment includes a calculation step S11 and a derivation step S12.

[0055] In the calculation step S11, for each of the first patterns Sc1 set in advance, the moment generated in the car section 1 when a balance weight is attached to the attachment candidate position Pd selected therein is obtained as the generated moment Mc.

[0056] Specifically, the second patterns Sc2 (any of the 56 second patterns Sc2) are taken one by one from each of the four divided regions Qri (i = 1, 2, 3, 4) and combined to form a first pattern Sc1. For each of the first patterns Sc1, the generated moment Mcx about the X-axis is calculated using [Equation 1], and the generated moment Mcy about the Y-axis is calculated using [Equation 2].

[0057]

number

[0058] Here, Mcx(i) represents the absolute value of the moment around the X-axis occurring in the region Qri. Ni represents the number of mounting candidate positions Pd included in the region Qri, and in this embodiment, Ni=10 in each region Qri. gw represents the weight of the balance weight, and in this embodiment, a balance weight with the same weight gw is attached to each mounting candidate position Pd. Yc(i) is Yc(i)=|Yc1| when i=1, 2, and Yc(i)=|Yc2| when i=3, 4. ni represents an index given to the bit string Cn extracted as the second pattern Sc2 of the region Qri. j is an index (j=1, 2, . . .) that represents the position of each bit in the bit string Cn in order from the position of the bit corresponding to the mounting candidate position Pd closest to the Y-axis.

[0059]

number

[0060] Here, Mc(i) represents the absolute value of the moment around the Y axis generated in the region Qri, and Wc represents the width (element width) of the element Rc in the X-axis direction (see FIG. 5).

[0061] Then, in calculation step S11, the generation moments Mcx and Mcy are calculated using the above [Equation 1] and [Equation 2] for all first patterns Sc1 (56 to the power of 4 patterns) obtained by taking and combining second patterns Sc2 (any of the 56 second patterns Sc2) one by one from the four regions Qri (i = 1, 2, 3, 4).

[0062] In the derivation step S12, among the first patterns Sc1 (in this embodiment, 56 fourth power combination patterns), one in which the error between the generated moment Mc calculated in the calculation step S11 and the target moment Mp is within an allowable range is derived as an installation pattern Sp.

[0063] Specifically, from the first pattern Sc1, those patterns in which the error between the generated moment Mcx about the X axis calculated in calculation step S11 and the target moment Mpx about the X axis is within an allowable range (less than a predetermined value dMx) and the error between the generated moment Mcy about the Y axis calculated in calculation step S11 and the target moment Mpy about the Y axis is within an allowable range (less than a predetermined value dMy) are extracted (step S12A).

[0064] In step S12A, a plurality of first patterns Sc1 appear in which the errors around both the X-axis and the Y-axis are within the allowable range, and as a result, a plurality of first patterns Sc1 may be extracted.

[0065] Then, it is determined whether the extracted first pattern Sc1 is "one" or "multiple" (step S12B). If it is determined in step S12B that there is "one", that one first pattern Sc1 is derived as the installation pattern Sp (step S12C). On the other hand, if it is determined in step S12B that there is "multiple", from the multiple first patterns Sc1, the one that minimizes the total weight of the attached balance weights is derived as the installation pattern Sp (step S12D).

[0066] According to this derivation method, it is possible to easily derive an installation pattern Sp for balance adjustment in which the error from the target moment Mp falls within an allowable range.

[0067] Furthermore, when a worker adjusts the balance of the cage section 1, the worker need only perform the simple task of attaching balance weights to the cage section 1 in accordance with the derived installation pattern Sp. With just this simple task, it is possible to generate a moment in the cage section 1 such that the error with respect to the target moment Mp is within an acceptable range.

[0068] In this embodiment, only combination patterns in which the mounting candidate positions Pd are grouped together in each region Qr are set as the second pattern Sc2, so that in the derived installation pattern Sp, the mounting candidate positions Pd appear in a grouped state in each region Qr (or there are no mounting candidate positions Pd at all). Therefore, when the worker attaches the balance weights to the car 1 according to the installation pattern Sp, the worker can attach the balance weights to a grouped location, which makes the work easier for the worker.

[0069] Furthermore, by setting only one such combined pattern as the second pattern Sc2, the number of first patterns Sc1 (combinations of the second patterns Sc2 taken one by one from each of the four divided regions Qr1 to Qr4) can be reduced, and as a result, the amount of calculation in the calculation step S11 can be reduced. On the other hand, although the number of first patterns Sc1 is limited, the first patterns Sc1 are set as combination patterns in which the installation positions of the balance weights are distributed among the four divided regions Qr1 to Qr4, so that the first patterns Sc1 tend to include patterns in which the error from the target moment Mp falls within the allowable range.

[0070] In this embodiment, when multiple first patterns Sc1 appear in which the error from the target moment Mp falls within the allowable range in the derivation step S12, the installation pattern Sp that minimizes the total weight of the attached balance weights is derived from the multiple first patterns Sc1. Therefore, it is possible to efficiently adjust the balance of the car 1 with the smallest possible total weight.

[0071] <Installation pattern derivation program> The calculation step S11 and the derivation step S12 described above may be executed by a computer. A program (a program for derivation of the installation pattern Sp) for causing a computer to execute these steps may be stored in a portable storage medium (e.g., a flash memory, etc.) in a readable state, or may be stored in an external device such as a server in a downloadable state.

[0072] [2] Variations [2-1] First modified example Depending on the elevator, the set mounting candidate positions Pd (see FIG. 5) may include a non-installation position Pe where the balance weight cannot be installed for some reason. Therefore, the above-mentioned derivation method and derivation program may be appropriately modified to derive the mounting pattern Sp excluding such non-installation positions Pe.

[0073] 8 is a flowchart showing a method for deriving an installation pattern Sp according to a first modified example. In this modified example, the derivation method further includes a first receiving step S21 and a resetting step S22. These steps may be executed by a computer together with other steps.

[0074] In the first reception step S21, when an installation impossible position Pe is designated from among the mounting candidate positions Pd, the designation of the installation impossible position Pe is accepted. Here, when this step is executed by a computer, the computer is caused to display a selection screen for selecting the installation impossible position Pe from among the mounting candidate positions Pd, and when the worker selects one of the mounting candidate positions Pd on the selection screen, the selected mounting candidate position Pd is regarded as designated as the installation impossible position Pe, and the computer is caused to execute acceptance of the designation.

[0075] In the resetting step S22, in the area Qr (here, any of the four divided areas Qr1 to Qr4) including the installation-prohibited position Pe accepted in the first acceptance step S21, the remaining combination patterns of the above-mentioned second pattern Sc2 (see Figure 6) excluding the one including the installation-prohibited position Pe are reset as a new second pattern Sc2.

[0076] According to the first modified example, even if an installation impossible position Pe is included among the already set candidate mounting positions Pd, by specifying it, the remaining combination pattern excluding the installation impossible position Pe can be reset as a new second pattern Sc2, and the installation pattern Sp can be derived using the new second pattern Sc2.

[0077] [2-2] Second variant The above-mentioned derivation method and derivation program may be modified to execute the calculation step S11 and the derivation step S12 in the order of the number Nc (Nc≧1) of the mounting candidate positions Pd selected in the first pattern Sc1, starting with the first pattern Sc1, and repeat the process until the installation pattern Sp can be derived in the derivation step S12.

[0078] 9 is a flowchart showing a method of deriving an installation pattern Sp according to the second modified example. In this modified example, first, a parameter m representing the number Nc of candidate attachment positions Pd is used and set to m=1 (step S31). Next, when a combination of second patterns Sc2 taken out one by one from each of the four divided regions Qr1 to Qr4 is taken as a first pattern Sc1, a combination of second patterns Sc2 in which the number Nc of candidate attachment positions Pd in ​​the first pattern Sc1 is Nc=m is extracted (step S32).

[0079] Then, in a calculation step S11, the generated moment Mc for each combination (first pattern Sc1 with Nc=m) of the second pattern Sc2 extracted in step S32 is calculated.

[0080] Next, in a derivation step S12, from among the combinations of the second pattern Sc2 extracted in step S31 (the first pattern Sc1 with Nc=m), those in which the error between the generated moment Mc calculated in the calculation step S11 and the target moment Mp is within an allowable range are extracted (step S12A).

[0081] Thereafter, it is determined whether or not a combination of second patterns Sc2 (first pattern Sc1 with Nc=m) with an error within the allowable range has been extracted (step S12E). If it is determined in step S12E that "extraction has been possible (Yes)", the extracted combination of second patterns Sc2 (first pattern Sc1 with Nc=m) is derived as an installation pattern Sp (step S12F). On the other hand, if it is determined in step S12E that "extraction has not been possible (No)", 1 is added to parameter m (step S12G), and then the process returns to step S32 and the same process is repeated.

[0082] In step S12A, when a plurality of combinations of second patterns Sc2 (first patterns Sc1 with Nc=m) in which the error is within the allowable range are extracted, the worker may select any one of them. For example, when the steps of this modification are executed by a computer, the computer may be caused to display a selection screen for selecting any one of the plurality of first patterns Sc1 extracted in step S12A, and when the worker selects any one of the first patterns Sc1 on the selection screen, the computer may be caused to derive the selected first pattern Sc1 as the installation pattern Sp.

[0083] According to the second modification, the installation pattern Sp can be searched for in order starting from the first pattern Sc1 having the smallest number Nc of mounting candidate positions Pd, and when the installation pattern Sp is found, the derivation of the installation pattern Sp can be terminated at that point. Therefore, the amount of calculation required to derive the installation pattern Sp can be reduced. Moreover, it becomes possible to efficiently achieve balance adjustment of the car part 1 with the smallest possible total weight.

[0084] In addition, the derivation method and derivation program of this modified example are not limited to those that group first patterns Sc1 having the same number Nc of mounting candidate positions Pd as one group, as described above, and execute the calculation step S11 and the derivation step S12 in order from the group with the smallest number Nc, but may instead be appropriately modified to those that execute the calculation step S11 and the derivation step S12 one by one in order from the first pattern Sc1 with the smallest number Nc of mounting candidate positions Pd.

[0085] [2-3] Third variant When an operator adjusts the balance of the car section 1, there is an upper limit to the number Nd of balance weights that the operator can prepare for that purpose. Therefore, the above-described derivation method and derivation program may be appropriately modified to one that can derive an installation pattern Sp within the range of the upper limit value Ndh of the number Nd of balance weights.

[0086] 10 is a flowchart showing a method for deriving an installation pattern Sp according to a third modified example. In this modified example, the derivation method further includes a second receiving step S41. This step may be executed by a computer together with other steps.

[0087] In the second reception step S41, when an upper limit value Ndh of the number Nd of balance weights used in balance adjustment is specified by, for example, an operator, the specification of the upper limit value Ndh is accepted. Here, when this step is executed by a computer, the computer is caused to display an input screen for the upper limit value Ndh, and when the operator inputs a number on the input screen, the input number is regarded as being specified as the upper limit value Ndh, and the computer is caused to accept the specification.

[0088] Then, when the specification of the upper limit value Ndh is accepted in the second acceptance step S41, the calculation step S11 and the derivation step S12 are executed for the first pattern Sc1 in which the number Nc of the selected mounting candidate positions Pd is equal to or less than the upper limit value Ndh.

[0089] Specifically, when the second patterns Sc2 are taken out one by one from each of the four divided regions Qr1 to Qr4 and combined to form the first pattern Sc1, a combination of the second patterns Sc2 in which the number Nc of the mounting candidate positions Pd in ​​the first pattern Sc1 is equal to or smaller than the upper limit value Ndh is extracted (step S42). Then, the calculation step S11 and the derivation step S12 are executed for the combinations of the second patterns Sc2 extracted in step S42 (first patterns Sc1 with Nc≦Ndh).

[0090] According to the third modified example, by specifying the number Nd of balance weights prepared by the worker for balance adjustment as an upper limit value Ndh, it becomes possible to derive an installation pattern Sp within the range up to the upper limit value Ndh.

[0091] [2-4] Fourth variant In the above-mentioned derivation method and derivation program, the mounting candidate positions Pd are not limited to positions that can be mounting candidates in the connecting beam Bm2, and may be appropriately changed to positions that can be mounting candidates in another part depending on the configuration of the car frame 12. Furthermore, the mounting candidate positions Pd may be set in a matrix or lattice pattern in the XY coordinate plane (two-dimensional plane) depending on the configuration of the car frame 12. Even when set in a matrix or lattice pattern in this way, in each divided region Qr, a combination pattern in which only adjacent mounting candidate positions Pd that are grouped together (mounting candidate positions Pd grouped together in a line or island shape) are selected can be set as the second pattern Sc2, including a case in which none of the mounting candidate positions Pd are selected.

[0092] [2-5] Fifth variant In the above-described derivation method and derivation program, when setting the second pattern Sc2, the XY coordinate plane is not limited to being divided into four regions Qr, and may be divided into a number of regions Qr other than four.

[0093] Furthermore, when the second pattern Sc2 is set for each divided region Qr, a combination pattern in which a plurality of clusters appear in each region Qr may be set as the second pattern Sc2.

[0094] Alternatively, without dividing the candidate mounting positions Pd, all possible combination patterns or some of them that are conceivable when selecting at least one position from all the candidate mounting positions Pd on the XY coordinate plane may be set as the first pattern Sc1.

[0095] [2-6] 6th variant The above-described derivation method and derivation program may be appropriately modified so that the weight gw of the balance weight to be attached to the attachment candidate position Pd is variable.

[0096] [2-7] 7th variant When carrying out the above-mentioned advance preparation (part 1), if a balance weight has already been attached to the car section 1, the target moment Mp may be derived by considering the balance weight as a test weight. After deriving the installation pattern Sp using the target moment Mp, the position of the already attached balance weight may be changed or the balance weight may be removed to achieve the installation pattern Sp.

[0097] The above-mentioned embodiments and the description of the modifications should be considered as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, not by the above-mentioned embodiments and modifications. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0098] 1. Cage section 2 Guide rails 3. Balance measurement section 11 Car 12 Basket Frame 21 Legs 31, 32 Sensor Cn bit string Gs, Gs1, Gs2, Gs3 graphs Gt, Gt1, Gt2, Gt3 graph Lx, Ly distance Mc, Mcx, Mcy generation moment Mp, Mpx, Mpy target moments Mx, My certain value Nc, Nd Number Pd Mounting position Pdx X coordinate Pdy Y coordinate Pe position where installation is not possible Qr, Qr1, Qr2, Qr3, Qr4, Qri area Rc element Sp installation pattern X0, Y0 origin X1, Y1 positive position X2, Y2 negative position gw weight 121 Main body 121A Bottom frame 121B Side frame part 121C Top frame 122 Holding part 122A, 122B Roller Bm1 Main beam Bm2 connecting beam Lx0, Ly0 reference distance Mtx, Mty moments Ndh upper limit Sc1 First Pattern Sc2 2nd Pattern dLx1, dLx2, dLx3 deviation dLy1, dLy2, dLy3 deviation dMx, dMy specified value S11 Calculation step S12 Derivation step S21 First reception step S22 Resetting step S41 Second reception step

Claims

1. A method for deriving an installation pattern of balance weights that generates a target moment for balance adjustment on an elevator car, comprising the steps of: a position in the cage portion that can be a candidate for attaching the balance weight is set as an attachment candidate position; a calculation step of determining, as a first pattern, all combination patterns or a part thereof that are possible when at least one position is selected from the candidate attachment positions, and determining, for each first pattern, a moment that is generated in the cage when the balance weight is attached to the candidate attachment position selected in the first pattern, as a generated moment; a derivation step of deriving, from among the first patterns, a pattern in which an error between the generated moment calculated in the calculation step and the target moment is within an allowable range as the installation pattern; A method for deriving an installation pattern comprising:

2. A position that can be a candidate for the attachment within a two-dimensional plane that is set horizontally at a specific height position is set as the candidate attachment position; Furthermore, the two-dimensional plane is divided into at least two regions, and for each region, all combination patterns or a part thereof that can be considered when selecting at least one position from the attachment candidate positions included in that region are set as a second pattern, including a case where none of the combination patterns is selected; The method for deriving an installation pattern according to claim 1 , further comprising the steps of: extracting the second patterns one by one from the divided regions and combining them to form the first pattern, and then performing the calculation step and the derivation step.

3. 3. The method for deriving an installation pattern according to claim 2, wherein, for each region, all combination patterns or some of the combination patterns that are possible when selecting only the mounting candidate positions that are adjacent to each other and grouped together from among the mounting candidate positions included in the region are set as the second pattern, including a case where none of the combination patterns are selected.

4. a first reception step of receiving, when a non-installation position where the balance weight cannot be installed is designated from among the candidate attachment positions, the designation of the non-installation position; a resetting step of resetting, when the designation of the installation impossible position is accepted in the first accepting step, a remaining combination pattern of the second patterns, excluding the combination pattern including the installation impossible position, in an area including the installation impossible position among the divided areas, as a new second pattern; The method for deriving an installation pattern according to claim 2 or 3, further comprising:

5. The car section includes a car and a car frame supporting the car, The car frame includes two connecting beams arranged in parallel on a bottom surface side of the car, 4. The method for deriving an installation pattern according to claim 2 or 3, wherein the two-dimensional plane is set to include the two connecting beams, and positions within the two-dimensional plane that may be candidates for attaching the balance weight to the two connecting beams are set as the candidate attachment positions.

6. 4. The method for deriving an installation pattern according to claim 1, wherein, in the derivation step, when a plurality of first patterns appear in which the error from the target moment falls within an allowable range, one of the plurality of first patterns that minimizes the total weight of the balance weights to be attached is derived as the installation pattern.

7. The method for deriving an installation pattern according to any one of claims 1 to 3, further comprising executing the calculation step and the derivation step in order of the first pattern having the smallest number of the mounting candidate positions selected therein, and repeating the steps until the installation pattern can be derived in the derivation step.

8. a second reception step of receiving, when an upper limit value of the number of the balance weights used in the balance adjustment is specified, the specification of the upper limit value; Further comprising: The method for deriving an installation pattern according to any one of claims 1 to 3, wherein, when a designation of the upper limit value is accepted in the second acceptance step, the calculation step and the derivation step are executed for the first pattern in which the number of the mounting candidate positions selected therein is equal to or less than the upper limit value.

9. A program for deriving an installation pattern of a balance weight that generates a target moment for balance adjustment in an elevator car, comprising: a position in the cage portion that can be a candidate for attaching the balance weight is set as an attachment candidate position; On the computer, a calculation step of determining, as a first pattern, all combination patterns or a part thereof that are possible when at least one position is selected from the candidate attachment positions, and determining, for each first pattern, a moment that is generated in the cage when the balance weight is attached to the candidate attachment position selected in the first pattern, as a generated moment; a derivation step of deriving, from among the first patterns, a pattern in which an error between the generated moment calculated in the calculation step and the target moment is within an allowable range as the installation pattern; A program to derive an installation pattern.

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