Rail centering device

Abstract

To provide a rail centering device capable of being installed without being affected by a state of a wall surface in a hoistway and strength of a work basket.SOLUTION: A rail centering device 20 comprises a rail centering device 6, a rail gripping part, a first actuator 12, a second actuator 10, an actuator base 9, and a fixing mechanism 11. The rail centering device 6 is disposed between a pair of guide rails 3. The rail gripping part is provided at the rail centering device 6 to grip the guide rail 3. The first actuator 12 movably supports the rail centering device 6 in a first direction. The second actuator 10 movably supports the rail gripping part in a second direction. The actuator base 9 supports the first actuator 12 and the second actuator 10. The fixing mechanism 11 fixes the actuator base 9 to a fixing bracket 1b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rail centering device. [Background technology]

[0002] To ensure a comfortable elevator ride, the guide rails must be installed straight so that the car does not sway when ascending or descending. For this reason, when installing an elevator in a building's elevator shaft, the guide rails must be precisely positioned (centered) in accordance with building standards, and then the work of fixing the guide rails to the elevator shaft walls is carried out along the entire length of the elevator shaft.

[0003] The above-mentioned building standards generally require the use of a piano wire with a weight attached that is hung from the top to the bottom of the elevator shaft. During the installation of the guide rail, workers use the piano wire to center the guide rail. Specifically, the workers measure the distance between the piano wire and the guide rail using a scale or the like, and adjust the position of the guide rail so that the measured value is a predetermined value.

[0004] A technology for centering guide rails is described, for example, in Patent Document 1. Patent Document 1 describes the provision of a front wall distance adjustment member and a side wall distance adjustment member. The front wall distance adjustment member is fixed to a work car housed in a hoistway so that it can move up and down, and adjusts the distance in a first direction between the work car and a front wall that is approximately perpendicular to two side walls among the inner peripheral walls of the hoistway. The front wall distance adjustment member also adjusts the position in the first direction of the guide rails that are clamped by guide shoes fixed to the work car. The side wall distance adjustment member is fixed to at least one of a pair of guide rails, and adjusts the distance between the two side walls and each guide rail, thereby adjusting the position of each guide rail in a second direction. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-3465 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the technology described in Patent Document 1, the front wall distance adjustment member and the side wall distance adjustment member are fixed to the wall surface of the working car or the hoistway. Therefore, the technology described in Patent Document 1 has a problem in that if the wall surface of the hoistway or the working car is not strong enough, the front wall distance adjustment member and the side wall distance adjustment member cannot be installed.

[0007] In consideration of the above problems, the present invention aims to provide a rail centering device that can be installed without being affected by the condition of the wall surface of the elevator shaft or the strength of the work car. [Means for solving the problem]

[0008] In order to solve the above problems and achieve the present object, the rail centering device comprises a rail centering device, a rail gripping portion, a first actuator, a second actuator, an actuator base, and a fixing mechanism. The rail centering device is disposed between a pair of guide rails of the elevator. The rail gripping unit is provided on the rail centering device and grips the guide rail. The first actuator supports the rail centering device movably in a first direction that is perpendicular to the up-down direction and parallel to the longitudinal direction of the rail centering device. The second actuator supports the rail gripping unit movably in a second direction that is perpendicular to the up-down direction and also perpendicular to the first direction. The actuator base supports the first actuator and the second actuator. The fixing mechanism fixes the actuator base to a fixing bracket installed in the hoistway. [Effects of the Invention]

[0009] The rail centering device having the above configuration can be installed without being affected by the condition of the wall surface of the elevator shaft or the strength of the work car. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a top view showing a state in which a rail centering device according to an embodiment is installed; [Figure 2] 1 is a block diagram showing a system configuration of a rail centering device according to an embodiment; [Figure 3] 1 is a plan view showing a rail centering device according to an embodiment; [Figure 4] 1 is a front view showing a rail centering device according to an embodiment; [Figure 5] 1 is a perspective view showing a front-rear adjustment actuator of a rail centering device according to an embodiment; [Figure 6] 10 is a perspective view of the front-rear adjustment actuator of the rail centering device according to the embodiment, seen from another direction. FIG. [Figure 7] 1 is a perspective view showing a bracket gripping portion of a rail centering device according to an embodiment; [Figure 8] 1 is a perspective view showing a connection base and a left-right adjustment actuator of a rail centering device according to an embodiment; [Figure 9] 1 is a perspective view showing a guide rail gripping portion of a rail centering device according to an embodiment; [Figure 10] 10 is a perspective view of the guide rail gripping portion of the rail centering device according to the embodiment, viewed from another direction. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a rail centering device according to an embodiment will be described with reference to Figures 1 to 10. Note that common members in each figure are given the same reference numerals.

[0012] 1. Example of implementation 1-1. Elevator configuration example First, the configuration of an elevator to which a rail centering device 20 according to an embodiment (hereinafter referred to as "this example") is applied will be described with reference to FIG. FIG. 1 is a top view showing the rail centering device of this embodiment in an installed state.

[0013] As shown in FIG. 1, elevator 100 includes a car that moves up and down in an elevator shaft 1 formed within an architectural structure, and a pair of guide rails 3 that guide the movement of the car. The pair of guide rails 3 are centered (positioned) using a rail centering device 20 (described later) with reference to a piano wire 2 suspended in elevator shaft 1. Here, the X direction (first direction) in FIG. 1 is perpendicular to the up-down direction and is the left-right direction (width direction) when viewed from the elevator hall side. The Y direction (second direction) is perpendicular to the X direction and also perpendicular to the up-down direction, and is the front-to-back direction (depth direction) when viewed from the elevator hall side.

[0014] The elevator shaft 1 is a space provided in a building for installing the elevator 100. The elevator shaft 1 is a space surrounded on all four sides by inner peripheral walls. The inner peripheral walls have a side wall 1ws facing the elevator in the X direction (left-right direction), a front wall perpendicular to the side wall 1ws and having a landing opening 1a formed therein, and a rear wall 1wb facing the front wall in the Y direction (front-rear direction).

[0015] A fixed bracket 1b is fixed to the side wall 1ws. The fixed bracket 1b is a metal fitting made of steel. If the building is made of reinforced concrete, a hole is drilled in the concrete wall and an L-shaped metal fitting is bolted to the hole to form the fixed bracket 1b. If the building is made of steel, a flat metal fitting is abutted against the top surface of the steel frame and fastened with a bolt or welded to form the fixed bracket 1b. A rail bracket 1c for installing the guide rail 3 is fixed to this fixed bracket 1b.

[0016] The piano wire 2 is a steel wire used in building standards, and is hung from the top of the building with a weight attached, fixed in a vertically stretched state. The piano wires 2 are installed at a fixed distance on the left and right sides of the elevator shaft 1, and are used as reference lines when centering the guide rails 3 to adjust their positions.

[0017] The guide rail 3 is a steel rail with a T-shaped surface (T-beam). The guide rail 3 has a wide flange portion 3b and a blade portion 3a (see FIG. 9). The blade portion 3a protrudes from the middle of the flange portion 3b in the width direction.

[0018] The guide rails 3 are arranged, for example, along two opposing side walls 1ws of the inner peripheral wall of the hoistway 1, with the center of gravity [G] of the car mentioned above in between. The guide rails 3 are positioned by a rail centering device 20 within an error range of several millimeters from a reference position. The positioned guide rails 3 are then fixed to the fixed bracket 1b via the rail bracket 1c. The guide rails 3 are positioned and fixed to the hoistway 1 at several points in the vertical direction, so that the guide rails 3 are installed vertically.

[0019] When positioning the guide rail 3 using the rail centering device 20, the flange portion 3b is opposed to the side wall 1ws and the blade portion 3a is directed toward the center of the elevator shaft 1. A position detection unit 7 of the rail centering device 20, which will be described later, is installed on the blade portion 3a. The position detection unit 7 measures the distance to the piano wire 2, thereby performing the centering work of the guide rail 3. When performing the centering work of the guide rail 3, the worker gets into the work car 4.

[0020] The work car 4 is a mobile platform on which workers board to install the guide rails 3. The work car 4 utilizes part of the permanent passenger car of the elevator 100. The work car 4 is equipped with a work platform on which workers board. The work car 4 is suspended and supported within the hoistway 1 by a suspending rope 5 at a position sandwiched between two guide rails 3.

[0021] The lifting rope 5 is wound by a winder (not shown), allowing the working car 4 to be raised and lowered freely. A worker gets into the working car 4, raises and lowers the working car 4 along the guide rail 3 to a predetermined height in the hoistway 1, and performs centering work on the guide rail 3.

[0022] 1-2. Rail centering device 20 Next, the configuration of the rail centering device 20 will be described with reference to FIGS. The rail centering device 20 includes a rail centering element 6, two position detection units 7, two first bases 8, an actuator base 9, and a connection base 13. The rail centering device 20 also includes two front-rear adjustment actuators 10, two fixing mechanisms 11, a left-right adjustment actuator 12, and a rail gripping unit 30 (see FIG. 3). The rail centering device 20 also includes a control circuit 14 and an operation panel 15.

[0023] The position detection unit 7 is a device that measures the distance between the track surface and cutting edge surface of the guide rail 3 and the piano wire 2. The position detection unit 7 is detachably attached to the guide rail 3. The position detection unit 7 is composed of a position sensor that detects the piano wire 2, a housing that holds the position sensor, and a rail clip that fastens the housing to the guide rail 3.

[0024] The position sensor consists of an X-axis position sensor that detects the position of the piano wire 2 in the X-axis direction and a Y-axis position sensor that detects the position of the piano wire 2 in the Y-axis direction. The position sensor is configured, for example, using a photointerrupter. The photointerrupter is an optical sensor with a light emitter and a light receiver arranged facing each other in a U-shaped sensor housing. The photointerrupter can detect the presence and position of an obstruction between the light emitter and the light receiver. Using this photointerrupter as a position sensor makes it possible to determine whether the position of the piano wire 2 is within the detection range between the light emitter and the light receiver. Furthermore, using multiple photointerrupters allows multiple detection ranges to be arranged consecutively, enabling the position of the piano wire 2 to be detected more precisely over a wider range. The position sensor is not limited to a photointerrupter and may be configured, for example, using a charge-coupled device (CCD) sensor or a position-sensitive detector (PSD) sensor.

[0025] The housing acts as a gauge that maintains a predetermined distance from the guide rail 3 to the position sensor. It also houses a communication device that transmits the distance information between the guide rail 3 and the piano wire 2 measured by the position sensor to the outside, as well as a battery.

[0026] The rail clip is detachably attached and fastened by means of a magnet, clamp, or the like to the cutting edge surface and track surface of the guide rail 3. The position detection unit 7 having such a configuration is attached to each of the left and right guide rails 3.

[0027] FIG. 2 is a block diagram showing the system configuration of the rail centering device 20. As shown in FIG. As shown in FIG. 2, the control circuit 14 includes, for example, a signal processing unit, a wireless communication unit, a motor driver, and a power supply. The signal processing unit uses an embedded microcomputer or the like capable of handling a variety of input and output signals. The wireless communication unit is a radio for receiving the position signal of the piano wire 2 sent from the position detection unit 7. The motor driver is a driver IC for controlling the motor that drives the forward / backward adjustment actuator 10 and the motor that drives the left / right adjustment actuator 12. The control circuit 14 receives the detection signal sent by the position detection unit 7 and outputs drive signals to the forward / backward adjustment actuator 10 and the left / right adjustment actuator 12, respectively, based on the received detection signal and commands from the operation panel 15.

[0028] As a result, the control circuit 14 controls the driving of the front-to-back adjustment actuator 10 and the left-to-right adjustment actuator 12 based on the position signal from the position detection unit 7, thereby automating tasks that have been performed manually by an operator. Specifically, it is possible to automate the tasks of measuring the distance between the piano wire 2 and the guide rail 3 using a scale or the like, and adjusting the position of the guide rail 3 by hitting it with a hammer or the like while checking the measured value. This makes it possible to achieve highly accurate rail centering in a short amount of time, reducing the workload on the operator.

[0029] The operation panel 15 has switches for manually operating the longitudinal adjustment actuator 10 and the lateral adjustment actuator 12 and for executing automatic control of rail centering. The operation panel 15 also has indicators that display the status of the rail centering device 20. The operation panel 15 is directly connected to the control circuit 14, and issues commands to the control circuit 14 based on the operator's operations.

[0030] Next, the detailed configuration of the rail centering device 20 will be described with reference to FIGS. FIG. 3 is a plan view of the rail centering device 20, and FIG. 4 is a front view of the rail centering device 20. As shown in FIG.

[0031] As shown in Figures 3 and 4, the rail centering jig 6 is a jig that keeps the distance between the left and right guide rails 3 constant. The rail centering jig 6 is placed between the pair of guide rails 3. Rail gripping portions 30 that grip the guide rails 3 are provided on both ends of the rail centering jig 6. The rail centering jig 6 is placed between the pair of guide rails 3 via the rail gripping portions 30. The length of the rail centering jig 6 is set to the length of the pair of guide rails 3 in the X direction. The distance between the left and right guide rails 3 is determined by the rail centering jig 6.

[0032] The actuator base 9 is disposed in parallel to the rail centering member 6 along the X direction. The actuator base 9 is connected to the rail centering member 6 via a connection base 13. The actuator base 9 supports an actuator 10 for forward / backward adjustment and an actuator 12 for left / right adjustment.

[0033] A slide rail 41 (see FIGS. 5, 6, and 8) is installed on the upper surface of the actuator base 9. The slide rail 41 extends along the X direction, which is the longitudinal direction of the actuator base 9. The slide rail 41 supports the two first bases 8 and the connection base 13 so as to be slidable along the X direction.

[0034] The two first bases 8 are arranged on both ends of the actuator base 9 in the longitudinal direction, and the connection base 13 is arranged in the middle of the actuator base 9 in the longitudinal direction. The actuator base 9 is also provided with a left-right adjustment actuator 12 that moves the connection base 13 in the left-right direction (X direction). Furthermore, fixing mechanisms 11 are provided on both ends of the actuator base 9 in the longitudinal direction.

[0035] The configuration of the front-rear adjustment actuator 10, which is an example of the second actuator, will be described with reference to FIGS. 5 and 6 are perspective views showing the front-rear adjustment actuator 10. FIG. As shown in Figures 5 and 6, a slider 42 is provided at the bottom of the first base 8 in the vertical direction. The slider 42 slides on a slide rail 41 provided on the actuator base 9. A locking mechanism 43 is also provided on the slider 42. The locking mechanism 43 fixes the slider 42 at any position. As a result, the first base 8 is fixed at a predetermined position on the actuator base 9.

[0036] A front-rear adjustment actuator 10 and a front-rear adjustment slide rail 51 are installed on the top surface of the first base 8 in the vertical direction. The front-rear adjustment actuator 10 is, for example, a rod-shaped linear actuator that expands and contracts in the longitudinal direction (Y direction in FIG. 1). The front-rear adjustment actuator 10 has a main body 10a, a support 10b, and an expandable rod 10c. The support 10b is installed on the first base 8. The main body 10a is supported by the support 10b via a pivot pin 10d so as to be rotatable in the vertical direction.

[0037] The telescopic rod 10c is installed in the main body 10a so as to be extendable and retractable. The main body 10a extends and retracts the telescopic rod 10c based on a drive signal from the control circuit 14. The tip of the telescopic rod 10c is rotatably supported by the tip support part 53 via a pivot pin 53a.

[0038] The tip support portion 53 is provided on the front-rear adjustment slider 52. The front-rear adjustment slider 52 is slidably supported on the front-rear adjustment slide rail 51. The front-rear adjustment slide rail 51 extends along the front-rear direction (Y direction). Therefore, the front-rear adjustment slider 52 slides in the Y direction along the front-rear adjustment slide rail 51.

[0039] Additionally, a gripping arm 50 provided with a rail gripping portion 30 (described later) is fixed to the front-rear adjustment slider 52. When the front-rear adjustment actuator 10 is driven and the extendable rod 10c extends and retracts, the front-rear adjustment slider 52 and the gripping arm 50 move along the front-rear direction (Y direction).

[0040] The configuration of the fixing mechanism 11 will be described with reference to FIG. FIG. 7 is a perspective view showing the fixing mechanism 11. As shown in FIG. As shown in Fig. 7, the fixing mechanism 11 has a first clamping plate 61, a second clamping plate 62, a first fixing bolt 63, and a second fixing bolt 64. The first clamping plate 61 and the second clamping plate 62 face each other in the vertical direction with the fixing bracket 1b sandwiched therebetween. The first fixing bolt 63 is attached to the first clamping plate 61. The tip of the first fixing bolt 63 is formed into a cone-like pointed shape. The tip of the first fixing bolt 63 abuts against the upper surface of the fixing bracket 1b.

[0041] The second fixing bolt 64 is attached to the second clamping plate 62. The tip of the second fixing bolt 64 abuts against the underside of the fixed bracket 1b. By tightening the first fixing bolt 63 and the second fixing bolt 64, the first clamping plate 61 and the second clamping plate 62 can be fixed to the fixed bracket 1b. As a result, the actuator base 9 is fixed to the fixed bracket 1b via the fixing mechanism 11.

[0042] Next, the connection base 13 and the left-right adjustment actuator 12, which is an example of a first actuator, will be described with reference to FIG. FIG. 8 is a perspective view showing the connection base 13 and the left-right adjustment actuator 12. As shown in FIG. 8, the left-right adjustment actuator 12 is, for example, a rod-shaped linear actuator that expands and contracts in the longitudinal direction (X direction in FIG. 1). The left-right adjustment actuator 12 has a main body 12a, a support 12b, and an expandable rod 12c. The support 12b is disposed on a second base 22 fixed to the actuator base 9. The main body 12a is supported by the support 12b via a pivot pin 12d so as to be rotatable in the vertical direction.

[0043] The telescopic rod 12c is installed in the main body 12a so as to be extendable and retractable. The main body 12a extends and retracts the telescopic rod 12c based on a drive signal from the control circuit 14. The tip of the telescopic rod 12c is rotatably supported by the tip support part 71 via a pivot pin 71a.

[0044] The tip support portion 71 is provided on the connection base 13. The connection base 13 is supported on the slide rail 41 so as to be slidable in the left-right direction (X direction). A height adjustment bracket 73 is fixed to the connection base 13. The height adjustment bracket 73 is bent in an L shape. The height adjustment bracket 73 protrudes upward in the vertical direction from the upper surface of the connection base 13. The height adjustment bracket 73 is connected to a connection plate 72 fixed to the rail centering bracket 6 via a connection pin 74. The height adjustment bracket 73 is also formed with an elongated hole extending in the vertical direction. The connection pin 74 is inserted into this elongated hole. The height adjustment bracket 73 is connected to the connection plate 72 fixed to the rail centering bracket 6 via the connection pin 74.

[0045] The connection plate 72 is fixed to the longitudinal middle of the rail centering member 6 via a fixing bolt 23. The connection plate 72 has a long hole extending in the front-to-rear direction, and the rail centering member 6 has a long hole extending in the left-to-right direction. By inserting the fixing bolt 23 into the long hole of the connection plate 72 and the long hole of the rail centering member 6, the positions of the connection plate 72 and the rail centering member 6 in the front-to-rear and left-to-right directions can be adjusted.

[0046] Furthermore, by providing a vertically extending elongated hole in the height adjustment bracket 73, it is possible to adjust the height (vertical) positions of the connection base 13 and the rail centering member 6. As a result, the positions of the rail centering member 6 and the actuator base 9 can be adjusted via the connection base 13.

[0047] Next, the configuration of the rail gripping portion 30 will be described with reference to FIGS. 9 and 10 are perspective views showing the rail gripping portion 30. FIG. As shown in Figures 9 and 10, the rail gripping portion 30 has a ball bearing 31, a shaft 32, a gripping block 33, a positioning pin 34, a clamp support portion 35, a clamp arm 36, a holding portion 37, and a reference protrusion 38.

[0048] A positioning pin 34 is formed on the top surface 33a of the gripping block 33 in the vertical direction. The top surface 33a of the positioning pin 34 protrudes upward in the vertical direction. A rail centering device 6 is placed on the top surface 33a of the gripping block 33. By inserting the positioning pin 34 into the rail centering device 6 placed on the top surface 33a of the gripping block 33, the rail centering device 6 can be positioned. The gripping block 33 is then fixed to both ends of the rail centering device 6 by fixing bolts 21 (see Figure 6).

[0049] Further, a reference protrusion 38 is formed on the gripping block 33. The reference protrusion 38 has a flat portion that is parallel to the vertical direction. The flat portion of the reference protrusion 38 serves as a reference plane. The flat portion of the reference protrusion 38 abuts against the cutting edge surface of the blade portion 3a of the guide rail 3 that faces the inside of the elevator shaft 1.

[0050] The gripping block 33 is also formed with a first opening 33b and a second opening 33c. The first opening 33b is formed in the lower part of the gripping block 33 in the vertical direction, and the second opening 33c is formed in the upper part of the gripping block 33 in the vertical direction. A shaft 32 is disposed in the first opening 33b. The shaft 32 is disposed parallel to the vertical direction within the first opening 33b. A spherical ball bearing 31 is provided on the shaft 32.

[0051] The tip of the gripping arm 50 is supported by the ball bearing 31. The shaft 32 and the ball bearing 31 support the gripping block 33 so that it can move up and down relative to the gripping arm 50 and can rotate horizontally.

[0052] A rotation shaft (not shown) is disposed in the second opening 33c. The rotation shaft is disposed parallel to the vertical direction. A clamp support portion 35 is rotatably supported on the rotation shaft. A rotation pin 35a is provided at the tip of the clamp support portion 35. A clamp arm 36 is rotatably supported on the rotation pin 35a. A holding portion 37 is provided at the tip of the clamp arm 36.

[0053] By rotating the clamp support portion 35 and the clamp arm 36, the holding portion 37 engages with the flange portion 3b of the guide rail 3. A holding screw 37a is provided on the holding portion 37. When the holding screw 37a is tightened while the holding portion 37 is engaged with the flange portion 3b, the flat portion of the reference protrusion 38 comes into close contact with the cutting edge surface of the blade portion 3a of the guide rail 3. In addition, the surface of the gripping block 33 on which the reference protrusion 38 is provided comes into close contact with the track surface of the blade portion 3a of the guide rail 3. This makes it possible to maintain the parallelism of the cutting edge surfaces of the left and right guide rails 3.

[0054] 2. Guide rail installation work Next, the installation and centering operations of the guide rail 3 using the rail centering device 20 having the above-described configuration will be described.

[0055] When installing the guide rails 3 in the elevator shaft 1, the work of centering and fixing the guide rails 3 is performed at several locations in the section from the lowest to the highest stage of the elevator shaft 1. Therefore, in the installation work of the guide rails 3, the work car 4 is moved to each stage, and the work of centering and fixing the guide rails 3 is repeated at each stage.

[0056] First, installation work is performed on part of the rail centering device at the lowest stage of the elevator shaft 1. In this installation work, first, the actuator base 9 is fixed to the fixed bracket 1b, and the control circuit 14 and the operation panel 15 are installed.

[0057] Next, the rail centering operation begins. In the rail centering operation, the left and right guide rails 3 are first gripped and connected by the rail centering rod 6, thereby integrating the left and right guide rails 3. That is, the guide rails 3 are gripped by the rail gripping portions 30 provided at both ends of the rail centering rod 6. Next, the actuator base 9 and the rail centering rod 6 are connected via the connection base 13.

[0058] Here, the flat surface of the reference protrusion 38 provided on the gripping block 33 is brought into close contact with the cutting edge surface of the guide rail 3, and the surface of the gripping block 33 on which the reference protrusion 38 is provided is brought into close contact with the track surface of the guide rail 3. This makes it possible to maintain the parallelism of the cutting edge surfaces of the left and right guide rails 3. Furthermore, the distance between the left and right guide rails 3 can be set according to the length of the rail centering lever 6.

[0059] The first base 8 to which the rail gripping portion 30 is connected is supported by a slide rail 41 provided on the actuator base 9 via a slider 42 so as to be movable in the left-right direction (X direction). Therefore, the distance between the two first bases 8 can be adjusted according to the distance between the two guide rails 3 to be installed. Once the adjustment of the distance between the two first bases 8, i.e., the distance between the two front-rear adjustment actuators 10, is completed, the slider 42 is fixed by the locking mechanism 43. As a result, the two front-rear adjustment actuators 10 are fixed with a predetermined distance between them in the left-right direction.

[0060] Furthermore, the left and right fixed brackets 1b to which the actuator base 9 is fixed may have different heights in the vertical direction. In contrast, according to the rail centering device 20 of this example, the gripping blocks 33 provided at both ends of the rail centering element 6 are connected to gripping arms 50 connected to the actuator base 9 via ball bearings 31. Therefore, the gripping blocks 33 are displaceable in the vertical direction relative to the gripping arms 50. This allows the rail centering element 6 to be parallel to the horizontal direction even if the left and right fixed brackets 1b have different heights. As a result, the cutting edges of the left and right guide rails 3 that abut against the gripping blocks 33 can be made parallel to the vertical direction.

[0061] Next, the position detection units 7 are attached to the left and right guide rails 3, respectively. At this time, the worker pinches the piano wire 2 with his fingers and guides it into the C-shaped notch provided in the position detection units 7. Next, the worker operates the operation panel 15 to execute automatic control of rail centering. In the automatic control, the control circuit 14 controls the front-rear adjustment actuator 10 and the left-right adjustment actuator 12 so that the detection signals output from the left and right position detection units 7 each reach a predetermined value.

[0062] When the front-rear adjustment actuator 10 is driven, the gripping block 33 provided at the tip of the gripping arm 50 moves in the front-rear direction, thereby positioning the guide rail 3 in the front-rear direction. When the left-right adjustment actuator 12 is driven, the rail centering lever 6 connected to the actuator base 9 via the connection base 13 moves in the left-right direction, thereby positioning the left and right guide rails 3 in the left-right direction.

[0063] The front-rear adjustment actuator 10 and the left-right adjustment actuator 12 are supported so that the main bodies 10a, 12a and the extendable rods 10c, 12c can rotate up and down. Therefore, even if the heights of both ends of the actuator base 9 in the left-right direction (X direction) are different, the front-rear adjustment actuator 10 and the left-right adjustment actuator 12 operate smoothly.

[0064] After the above-mentioned work is completed, the worker fixes the guide rail 3 to the rail bracket 1c, and fixes the rail bracket 1c to the fixed bracket 1b. After the fixing of the guide rail 3 is completed, the worker removes the position detection unit 7, the actuator base 9, and the rail centering member 6.

[0065] By carrying out such centering and fixing operations for the guide rails 3 over the entire area of ​​the elevator shaft 1 from the lowest level to the highest level, the installation of the guide rails 3 is completed.

[0066] In the above-described rail centering work, the work that was previously performed manually by an operator, specifically the work of measuring the distance between the piano wire 2 and the guide rail 3 using a scale or the like, and adjusting the position of the guide rail 3 by hitting it with a hammer or the like while checking the measured value, is automated by the rail centering device 20. This makes it possible to achieve highly accurate rail centering in a short time, and also reduces the burden on the operator.

[0067] Furthermore, in the rail centering device 20 of this example, the actuator base 9 is fixed to a fixed bracket 1b provided in the hoistway 1. This allows the actuator base 9 to be installed even when the distance between the left and right side walls 1ws of the hoistway 1 is too wide or when the strength of the walls of the work car 4 or the hoistway 1 is insufficient. As a result, with the rail centering device 20 of this example, the actuator base 9 can be installed without being affected by the condition of the walls of the hoistway or the strength of the work car.

[0068] The present invention is not limited to the above-described embodiment, but includes various modifications. For example, although the above-described embodiments have been described in detail to facilitate understanding of the present invention, the present invention is not necessarily limited to including all of the configurations described in the above-described embodiments. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to delete part of the configuration of each embodiment, add other configurations, or replace it with other configurations.

[0069] Furthermore, in the above-described embodiment, an example has been described in which the gripping block 33, which is the rail gripping portion 30, and the gripping arm 50 are connected by the ball bearing 31, but the present invention is not limited to this. A slide rail or any other type of mechanism can be applied as long as it is a mechanism that can displace the gripping block 33 in the vertical direction relative to the gripping arm 50. By providing a mechanism that can displace the gripping block 33 in the vertical direction, the rail centering lever 6 can be positioned parallel to the horizontal direction even if the heights of the fixing brackets 1b that fix the actuator base 9 are different on the left and right.

[0070] Although an example has been described in which rod-shaped linear actuators that expand and contract in the axial direction are used as the front-rear adjustment actuator 10 and the left-right adjustment actuator 12, the present invention is not limited to this. As the front-rear adjustment actuator 10 and the left-right adjustment actuator 12, various other mechanisms can be used as long as they can move the front-rear adjustment slider 52 provided with the gripping arm 50 along the front-rear adjustment slide rail 51 or the connection base 13 along the slide rail 41.

[0071] Furthermore, the member to which the fixing mechanism 11 is fixed is not limited to the fixing bracket 1b to which the rail bracket 1c is fixed. The fixing mechanism 11 may be fixed to various other fixing brackets fixed to the wall surface of the elevator shaft 1.

[0072] Furthermore, although the work car 4 that moves up and down in the hoistway 1 is used as the workplace where the guide rail installation work is performed, the present invention is not limited to this. As described above, the rail centering device 20 of this example can be installed without being affected by the state of the work car 4. Therefore, a scaffolding installed in the hoistway 1 may be used as the workplace where the guide rail installation work is performed.

[0073] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "substantially parallel" or "substantially orthogonal" state within a range in which the functions can be exerted. [Explanation of symbols]

[0074] DESCRIPTION OF SYMBOLS 1...hoistway, 1b...fixing bracket, 1c...rail bracket, 1wb...rear wall, 1ws...side wall, 2...piano wire, 3...guide rail, 3a...blade portion, 3b...flange portion, 4...work cage, 5...suspension rope, 6...rail centering device, 7...position detection portion, 8...first base, 9...actuator base, 10...front-rear adjustment actuator (second actuator), 10a, 12a...main body portion, 10b, 12b...support portion, 10c, 12c...extension rod, 10d, 12d...rotation pin, 11...fixing mechanism, 12...left-right adjustment actuator (first actuator), 13...connection base, 14...control circuit, 15...operation panel, 20...rail centering device, 22...second base, 30...rail gripping portion, 31...ball bearing, 32...shaft, 33...gripping block, 33a...upper surface, 34...positioning pin, 35...clamp support portion, 35a...rotating pin, 36...clamp arm, 37...holding portion, 38...reference protrusion, 41...slide rail, 42...slider, 43...locking mechanism, 50...gripping arm, 51...front-rear adjustment slide rail, 52...front-rear adjustment slider, 53...tip support portion, 53a...rotating pin, 61...first clamping plate, 62...second clamping plate, 63...first fixing bolt, 64...second fixing bolt, 71...tip support portion, 71a...rotating pin, 72...connecting plate, 73...adjustment bracket, 74...connecting pin, 100...elevator

Claims

1. a rail centering lever disposed between a pair of guide rails of the elevator; a rail gripping portion provided at the rail centering position and configured to grip the guide rail; a first actuator that supports the rail centering device so that the rail centering device can move in a first direction that is perpendicular to the up-down direction and parallel to the longitudinal direction of the rail centering device; a second actuator that supports the rail gripping portion so that the rail gripping portion can move in a second direction that is perpendicular to the up-down direction and perpendicular to the first direction; an actuator base supporting the first actuator and the second actuator; a fixing mechanism for fixing the actuator base to a fixing bracket installed in the hoistway; A rail centering device equipped with

2. a gripping arm connecting the rail gripping portion and the second actuator; The rail gripping portion is supported by the gripping arm so as to be displaceable in the up and down direction. The rail centering device according to claim 1 .

3. The rail gripping portion includes a gripping block that contacts the guide rail; a positioning pin provided on an upper surface of the gripping block for positioning the rail while centering the rail; The rail centering member is placed on the upper surface of the gripping block.

3. A rail centering device according to claim 2.

4. The gripping block is provided with a ball bearing to which the tip of the gripping arm is connected. The rail centering device according to claim 3.

5. The gripping block is provided with a reference protrusion that comes into contact with a cutting edge surface of a blade portion of the guide rail that faces the inside of the elevator shaft, The surface of the gripping block on which the reference protrusion is provided comes into contact with the track surface of the blade portion of the guide rail. The rail centering device according to claim 3.

6. a connection base that connects the rail centering member and the actuator base; The connection base is supported by the first actuator so as to be movable in the first direction. The rail centering device according to claim 1 .

7. The first actuator and the second actuator are configured to be displaceable in the up and down direction. The rail centering device according to claim 1 .

8. the second actuator is supported by the actuator base so as to be movable in the first direction; a locking mechanism that locks the second actuator against movement in the first direction; The rail centering device according to claim 1 .

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