Elevator control device replacement aids and replacement methods

Abstract

The present invention provides a replacement aid and a replacement method that can enhance the workability of work for replacing elevator control equipment. A replacement aid (26) is used in replacement work for control equipment (13) of an elevator (1). A mount stand (12) forms an edge of a first opening (14) that opens toward the vertical direction below a mounting surface (15) to which the control equipment (13) is mounted. The front–back length of a blocking plate (27) of the replacement aid (26) is longer than the front–back length of the first opening (14). The blocking plate (27) spreads between an edge of the first opening (14) on the front side and an edge of the first opening (14) on the back side below the control equipment (13).

Description

[Technical field]

[0001] The present disclosure relates to an elevator control device replacement aid and replacement method. [Background technology]

[0002] Patent Document 1 discloses an example of an electromagnetic contactor for an elevator. The electromagnetic contactor is attached to a vertical surface. Lead wires are drawn out from the bottom surface of the electromagnetic contactor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2001-310880 Summary of the Invention [Problem to be solved by the invention]

[0004] In elevator control devices such as the electromagnetic contactor of Patent Document 1, other devices to which lead wires drawn from the bottom are connected may be placed below the control device. In this case, an opening through which the lead wires or other wiring can pass may be provided below the control device attached to a vertical surface. When replacing an existing control device with a new one, a worker must perform the replacement work above the opening. This may result in poor workability of the replacement work.

[0005] The present disclosure relates to solving such problems. The present disclosure provides a replacement auxiliary tool and a replacement method that can improve the efficiency of the replacement work of the elevator control device. [Means for solving the problem]

[0006] The replacement aid disclosed herein is an replacement aid for an elevator control device that is attached to the front side of a mounting stand that includes a mounting surface that is parallel to the up-down and left-right directions and perpendicular to the front-to-back direction and forms the edge of a first opening that opens in the up-down direction below the mounting surface, and has a plate-like shape with front and rear edges that are parallel to each other, the length between the front and rear edges is longer than the front-to-back length of the first opening, the rear edge is placed on the rear edge of the first opening, and the front edge is placed on the front edge of the first opening, and the replacement aid is provided with a blocking plate that is suspended between the front edge of the first opening and the rear edge of the first opening below the control device.

[0007] The inspection method according to the present disclosure is a method of replacing the control device using the above-mentioned replacement auxiliary tool, and includes placing the blocking plate below the existing control device so as to span between the front edge of the first opening and the rear edge of the first opening, removing the existing control device from the mounting surface, placing the existing control device on the upper surface of the blocking plate by tilting it forward, and carrying the blocking plate down from the mounting frame with the existing control device placed on the upper surface of the blocking plate. the step of removing the existing control device from the upper surface of the blocking plate and placing the newly installed control device on the upper surface of the blocking plate; the step of placing the blocking plate so that the newly installed control device is placed between the front edge of the first opening and the rear edge of the first opening while keeping the newly installed control device on the upper surface of the blocking plate; the step of raising the newly installed control device from the front on the upper surface of the blocking plate; the step of attaching the newly installed control device to the mounting surface; and the step of removing the blocking plate from the mounting stand. The inspection method according to the present disclosure is a method for replacing the control device using the above-mentioned replacement auxiliary tool further including a pair of rods whose longitudinal length is longer than the length between the front edge and the rear edge, and includes the steps of: placing the blocking plate below the existing control device so as to span between the front edge of the first opening and the rear edge of the first opening; removing the existing control device from the mounting surface; placing the existing control device on the upper surface of the blocking plate by tilting it forward; carrying the blocking plate down from the mounting frame onto the pair of rods arranged parallel to each other while keeping the existing control device placed on the upper surface of the blocking plate; removing the existing control device from the upper surface of the blocking plate and placing the newly installed control device on the upper surface of the blocking plate; the newly installed control device being placed on the upper surface of a blocking plate and the blocking plate being placed so as to span between the front edge of the first opening and the rear edge of the first opening; lifting the newly installed control device from the front on the upper surface of the blocking plate; placing one of the pair of rods on the upper surface of the blocking plate facing left-right and the other of the pair of rods on top of the one facing front-to-rear, and positioning the rear end of the upper one of the pair of rods below the newly installed control device, and adjusting the vertical position of the newly installed control device by raising and lowering the front end of the upper one of the pair of rods; mounting the newly installed control device to the mounting surface; and removing the pair of rods and the blocking plate from the mounting stand. Effect of the Invention

[0008] According to the replacement aid or replacement method of the present disclosure, the workability of replacing elevator control equipment is improved. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a configuration diagram of an elevator according to a first embodiment. [Diagram 2] FIG. 2 is a configuration diagram of a control panel according to the first embodiment, as viewed from the left and right directions. [Diagram 3] FIG. 2 is a configuration diagram of a control panel according to the first embodiment, as viewed from the front-rear direction. [Figure 4] FIG. 2 is a configuration diagram of a control panel according to the first embodiment, as viewed from above and below. [Diagram 5] FIG. 2 is a perspective view of a replacement aid according to the first embodiment. [Figure 6] FIG. 2 is a perspective view of an existing electromagnetic contactor during replacement work using the replacement auxiliary tool according to the first embodiment. [Figure 7] FIG. 2 is a perspective view of an existing electromagnetic contactor during replacement work using the replacement auxiliary tool according to the first embodiment. [Figure 8] FIG. 2 is a perspective view of an existing electromagnetic contactor during replacement work using the replacement auxiliary tool according to the first embodiment. [Figure 9] 4A to 4C are diagrams showing an electromagnetic contactor carried in a replacement operation using the replacement auxiliary tool according to the first embodiment. [Figure 10] FIG. 2 is a perspective view of a newly installed electromagnetic contactor undergoing replacement work using the replacement auxiliary tool according to the first embodiment. [Figure 11] FIG. 11 is a perspective view of a replacement aid according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The embodiments for carrying out the present disclosure will be described with reference to the accompanying drawings. In each drawing, the same or corresponding parts are given the same reference numerals, and duplicated descriptions are appropriately simplified or omitted. Note that the subject of the present disclosure is not limited to the following embodiments, and any component of the embodiment may be modified or omitted within the scope of the gist of the present disclosure.

[0011] Embodiment 1 FIG. 1 is a configuration diagram of an elevator 1 according to the first embodiment.

[0012] The elevator 1 is applied to a building having multiple floors. A hoistway 2 is provided in the building. The hoistway 2 is a space that is long in the vertical direction and spans multiple floors. In this example, a machine room 3 is provided above the hoistway 2. The elevator 1 includes a hoisting machine 4, a main rope 5, a car 6, a counterweight 7, and a control panel 8.

[0013] The hoisting machine 4 is provided, for example, in the machine room 3. The hoisting machine 4 may be provided in the upper or lower part of the elevator shaft 2. The hoisting machine 4 is a device that generates a driving force. The hoisting machine 4 includes a driving sheave 9 that rotates by a driving force generated by a motor (not shown).

[0014] The main ropes 5 are wound around a drive sheave 9. The main ropes 5 support the load of the car 6 on one side of the drive sheave 9. The main ropes 5 support the load of the counterweight 7 on the other side of the drive sheave 9.

[0015] One of the car 6 and the counterweight 7 travels upward in the hoistway 2 so as to be wound up via the main rope 5 by the rotation of the drive sheave 9. At this time, the other of the car 6 and the counterweight 7 travels downward in the hoistway 2. The car 6 is a device that transports passengers and the like aboard between multiple floors by traveling up and down the hoistway 2. The weight of the counterweight 7 is set in consideration of the balance between the load of the car 6 and the load of the counterweight 7 applied through the main rope 5 on both sides of the drive sheave 9.

[0016] The control panel 8 is provided, for example, in the machine room 3. The control panel 8 may be provided at the top or bottom of the elevator shaft 2. The control panel 8 is a device that controls the operation of the elevator 1. The control panel 8 controls, for example, the up and down travel of the car 6. In this example, a worker performing maintenance work on the control panel 8 performs the work while facing the front of the control panel 8. The front-to-back direction is a direction within a horizontal plane perpendicular to the up-down direction. The left-to-right direction is a direction perpendicular to the front-to-back direction among directions perpendicular to the horizontal plane.

[0017] Next, an example of the configuration of the control panel 8 will be described with reference to FIGS.

[0018] FIG. 2 is a configuration diagram of the control panel 8 according to the first embodiment as viewed from the left and right direction.

[0019] In this example, the control panel 8 is stored in a rectangular parallelepiped cabinet 10. A door 11 is provided on the front of the cabinet 10. The door 11 is opened, for example, during maintenance work on the control panel 8. The door 11 may be removable. Here, the control panel 8 may be made up of one or more panels. The control panel 8 may be, for example, a panel for part or all of the control system of the elevator 1, which is made up of multiple panels. The control panel 8 may be, for example, an accessory panel, etc.

[0020] The control panel 8 includes a mounting base 12. The mounting base 12 is a frame or the like on which a control device of the elevator 1 constituting the control panel 8 is mounted. The mounting base 12 is housed in a cabinet 10. The mounting base 12 may be integrated with the cabinet 10. In this example, the control device of the elevator 1 is, for example, an electromagnetic contactor 13. The control device of the elevator 1 may be an electromagnetic relay or an electromagnetic switch. In this example, the control panel 8 is divided into an upper section and a lower section. A first opening 14 is provided between the upper section and the lower section of the control panel 8. The first opening 14 is an opening that opens in the vertical direction.

[0021] The electromagnetic contactor 13 is attached to a mounting surface 15 of the mounting stand 12. The mounting surface 15 is a surface that is arranged with its normal direction facing the front-rear direction. That is, the mounting surface 15 is arranged parallel to the up-down and left-right directions. The mounting surface 15 is arranged, for example, on the rear side inside the cabinet 10. The mounting surface 15 is arranged above the first opening 14. The electromagnetic contactor 13 is attached to the front side of the mounting surface 15 by fasteners 16 such as screws or bolts. The electromagnetic contactor 13 is arranged on the upper stage of the control panel 8.

[0022] The electromagnetic contactor 13 is housed in a cover 17 inside the cabinet 10. The cover 17 is, for example, a soundproof cover that suppresses the propagation of noise generated from the electromagnetic contactor 13 to the inside of the cage 6, etc. In this example, the cover 17 is disposed above the first opening 14. A lid 18 is provided on the front of the cover 17. The lid 18 is opened, for example, during maintenance work on the electromagnetic contactor 13. The lid 18 may be removable. A second opening 19 is provided on the front of the cover 17. The second opening 19 is an opening that opens toward the front. Under normal circumstances, the second opening 19 is closed by the lid 18.

[0023] In this example, the mounting base 12 includes a front beam 20, a rear beam 21, and two side beams 22 between the upper and lower stages of the control panel 8. The front beam 20 is disposed on the front side of the mounting base 12 so that the longitudinal direction is the left-right direction. The rear beam 21 is disposed on the rear side of the mounting base 12 so that the longitudinal direction is the left-right direction. One side beam 22 is disposed on the left side of the mounting base 12 so that the longitudinal direction is the front-rear direction. The other side beam 22 is disposed on the right side of the mounting base 12 so that the longitudinal direction is the front-rear direction. The front beam 20, the rear beam 21, and the two side beams 22 are disposed in the same horizontal plane. The front beam 20, the rear beam 21, and the two side beams 22 form the edges of the first opening 14. That is, the front beam 20 is the front edge of the first opening 14. Also, the rear beam 21 is the rear edge of the first opening 14. The left side beam 22 is the left edge of the first opening 14. The right side beam 22 is the right edge of the first opening 14.

[0024] FIG. 3 is a configuration diagram of the control panel 8 according to the first embodiment as viewed from the front and rear.

[0025] A lead wire 23 is drawn out from the bottom surface of the electromagnetic contactor 13. In this example, the bottom surface of the cover 17 that houses the electromagnetic contactor 13 is open so that the lead wire 23 can be drawn out. The lead wire 23 is passed from the upper stage to the lower stage of the control panel 8, for example, through the first opening 14. The lead wire 23 is connected to a lower device 24 that is arranged on the lower stage of the control panel 8, for example.

[0026] In this example, the mounting base 12 has two vertical pillars 25 on the front side of the control panel 8. Each vertical pillar 25 is arranged so that its longitudinal direction is the up-down direction. One vertical pillar 25 is arranged on the left side of the front side of the mounting base 12. The other vertical pillar 25 is arranged on the right side of the front side of the mounting base 12. The door 11 of the cabinet 10 is attached to, for example, the two vertical pillars 25 and the front frame of the mounting base 12.

[0027] FIG. 4 is a configuration diagram of the control panel 8 according to the first embodiment as viewed from above and below.

[0028] The length L1 in the front-to-rear direction of the first opening 14 is the length from the front end of the rear beam 21 to the rear end of the front beam 20. The length L2 in the front-to-rear direction of the mounting frame 12 is the length from the rear end of the rear beam 21 to the front end of the front beam 20. In other words, the length L2 in the front-to-rear direction of the mounting frame 12 is the sum of the length L1 in the front-to-rear direction of the first opening 14, the width L3 in the front-to-rear direction of the rear beam 21, and the width L4 in the front-to-rear direction of the front beam 20.

[0029] The left-right distance L5 between the two vertical columns 25 is the length from the right end of the left vertical column 25 to the left end of the right vertical column 25. The left-right width L6 of the mounting rack 12 is the length from the left end of the left vertical column 25 to the right end of the right vertical column 25. In other words, the left-right width L6 of the mounting rack 12 is the combined length of the left-right distance L5 between the two vertical columns 25 and the left-right width L7 of each vertical column 25.

[0030] The left-right width L7 of each vertical pillar 25 is longer than the left-right width L8 of each side beam 22. The front-rear width L9 of each vertical pillar 25 is longer than the front-rear width L4 of the front beam 20. Therefore, when projected onto a horizontal plane, i.e., within the horizontal projection plane, each vertical pillar 25 protrudes from the side beam 22 toward the first opening 14. That is, each vertical pillar 25 is an example of a protruding part.

[0031] A width L10 of the second opening 19 in the left-right direction is shorter than the distance L5 between the two vertical columns 25. A width L11 of the electromagnetic contactor 13 in the left-right direction is shorter than the width L10 of the second opening 19 in the left-right direction.

[0032] When replacing the existing electromagnetic contactor 13 with a new one, the worker needs to perform the replacement work above the first opening 14. At this time, the worker needs to perform the work by standing in front of the front end of the control panel 8 and reaching out to the rear of the control panel 8. During this work, the worker needs to perform the work while paying attention to prevent the electromagnetic contactor 13, which is a heavy object, or its accessories, from falling from the first opening 14 and colliding with the lower equipment 24 below. For this reason, in order to improve the workability of the replacement work and reduce the workload of the worker, a replacement auxiliary tool is used in the replacement work of the electromagnetic contactor 13.

[0033] FIG. 5 is a perspective view of the replacement aid 26 according to the first embodiment.

[0034] The replacement aid 26 includes a blocking plate 27 and a pair of rods 28.

[0035] The blocking plate 27 is a plate-shaped member. The blocking plate 27 is, for example, a metal plate. The blocking plate 27 is, for example, rectangular. The outer periphery of the blocking plate 27 includes a front edge 29, a rear edge 30, a side edge 31a, and a side edge 31b. In this example, the blocking plate 27 is rectangular with a notch 32 provided in the side edge 31a. The front edge 29 is the side on the front end side of the blocking plate 27. The rear edge 30 is the side on the rear end side of the blocking plate 27. The side edge 31a is the side on the left end side of the blocking plate 27. The side edge 31b is the side on the right end side of the blocking plate 27. The front edge 29 and the rear edge 30 are opposite sides parallel to each other. The side edges 31a and the side edges 31b are opposite sides parallel to each other. In FIG. 5, the blocking plate 27 is shown as viewed from the top side. Markers 33 are attached along the periphery of the upper surface of the closing plate 27. The markers 33 are, for example, labels having a color such as yellow or a pattern that can attract attention. In this example, the outer periphery of the closing plate 27 is chamfered. The lower surface of the closing plate 27 is a flat plane.

[0036] The length of the closing plate 27 in the front-rear direction is the length X1 between the front edge 29 and the rear edge 30. The length X1 between the front edge 29 and the rear edge 30 is longer than the length L1 of the first opening 14 in the front-rear direction. In this example, the length X1 between the front edge 29 and the rear edge 30 is longer than the length from the rear edge of the first opening 14 to the front end of the front beam 20 in the front-rear direction, i.e., the sum of the length L1 of the first opening 14 in the front-rear direction and the width L4 of the front beam 20 in the front-rear direction. The length X1 between the front edge 29 and the rear edge 30 may be longer than the length L2 of the mounting frame 12 in the front-rear direction.

[0037] The length of the blocking plate 27 in the left-right direction is the length X2 between the side edges 31a and 31b. The length X2 between the side edges 31a and 31b is shorter than the left-right distance L5 between the two vertical columns 25. The length X2 between the side edges 31a and 31b is longer than the left-right width L11 of the electromagnetic contactor 13. The length X2 between the side edges 31a and 31b may be longer than the left-right width L10 of the second opening 19.

[0038] The notch 32 is provided so as to follow the shape of a protruding portion that protrudes from the side beam 22 toward the first opening 14 in a horizontal projection plane. In this example, the notch 32 is provided so as to follow the shape of a horizontal cross section of the vertical column 25, which is an example of a protruding portion. For example, when the vertical column 25 has a rectangular column shape, the notch 32 is provided in a rectangular shape.

[0039] Each of the rods 28 is a rod-shaped member that is long in one direction. In this example, each of the rods 28 is a rectangular prism-shaped beam. Each of the rods 28 is, for example, wood. The longitudinal length X3 of each of the rods 28 is longer than the length X1 between the front edge 29 and the rear edge 30 of the closing plate 27. In this example, the lengths of the pair of rods 28 are equal to each other. The lengths of the pair of rods 28 may be different from each other. In this case, the longitudinal length of the shorter rod 28 may be shorter than the length X2 between the side edges 31a and 31b of the closing plate 27.

[0040] Next, an example of the replacement work of the electromagnetic contactor 13 will be described with reference to Fig. 6 to Fig. 10. The worker may perform each procedure of the replacement work in a different order to the extent possible, or may perform the procedures in parallel to the extent possible.

[0041] 6 to 8 are perspective views of an existing electromagnetic contactor 13 undergoing replacement work using the replacement auxiliary tool 26 according to the first embodiment. FIG. 9 is a diagram showing the electromagnetic contactor 13 carried in the replacement work using the replacement auxiliary tool 26 according to the first embodiment. FIG. 10 is a perspective view of a new electromagnetic contactor 13 undergoing replacement using the replacement aid 26 according to the first embodiment.

[0042] First, as shown in Fig. 6, an operator opens the door 11 of the cabinet 10 and the lid 18 of the cover 17. The operator removes the lead wire 23 passed through the first opening 14.

[0043] Next, the worker inserts the blocking plate 27 from the front below the existing electromagnetic contactor 13 and cover 17. At this time, the worker inserts the blocking plate 27 with the rear edge 30 of the blocking plate 27 facing the rear of the control panel 8. The worker places the rear edge 30 of the blocking plate 27 on the rear beam 21 of the mounting frame 12. At this time, the worker may move the blocking plate 27 to the left side of the control panel 8 so that the side edge 31a of the blocking plate 27 is positioned above the side beam 22 of the mounting frame 12. Since the side edge 31a of the blocking plate 27 receives the notch 32 that follows the shape of the horizontal cross section of the vertical column 25, the worker can move the blocking plate 27 to the left side without being hindered by the vertical column 25. After that, the worker places the front end of the blocking plate 27 on the front beam 20 of the mounting frame 12. In this manner, the worker places the blocking plate 27 so as to span between the front edge and the rear edge of the first opening 14. As a result, the first opening 14 below the existing electromagnetic contactor 13 is blocked by the blocking plate 27. At this time, the front edge 29 of the blocking plate 27 protrudes forward beyond the front end of the front beam 20 of the mounting frame 12. In addition, the side edge 31a of the blocking plate 27 rests on the side beam 22, which is the left edge of the first opening 14.

[0044] Next, the worker removes the existing electromagnetic contactor 13 from the mounting surface 15 by loosening the fasteners 16 .

[0045] Next, as shown in Fig. 7, the worker tilts the existing electromagnetic contactor 13 forward above the blocking plate 27. At this time, the lower end of the existing electromagnetic contactor 13 may be placed on the upper surface of the blocking plate 27. That is, the worker may tilt the existing electromagnetic contactor 13 forward using the lower end of the existing electromagnetic contactor 13 as a fulcrum. After that, as shown in Fig. 8, the worker places the existing electromagnetic contactor 13 on the upper surface of the blocking plate 27.

[0046] 9, the worker places the pair of bars 28 parallel to each other on the floor of a work area, such as the machine room 3. At this time, the pair of bars 28 are placed so that the distance between the pair of bars 28 is shorter than the left-right length of the closing plate 27. Each bar 28 is placed with its longitudinal direction facing the front-rear direction.

[0047] Next, the worker lifts the front edge 29 of the blocking plate 27 that protrudes forward from the front end of the front beam 20 of the mounting frame 12 while placing the existing electromagnetic contactor 13 on the upper surface of the blocking plate 27. At this time, the worker may move the blocking plate 27 to the right side of the control panel 8 so that the side edge 31a of the blocking plate 27 is separated from the side beam 22 of the mounting frame 12. The worker holds the side edge 31a of the blocking plate 27 and lifts the existing electromagnetic contactor 13 and the blocking plate 27. Here, the side edge 31b of the blocking plate 27 is being lifted by another worker. The worker carries the blocking plate 27 out of the mounting frame 12 while placing the existing electromagnetic contactor 13 on the upper surface of the blocking plate 27. At this time, the worker may move the blocking plate 27 to the front side so that the flat lower surface of the blocking plate 27 slides on the front beam 20. Since the closing plate 27 is brought closer to the worker while the load of the closing plate 27 and the existing electromagnetic contactor 13 is supported by the front beam 20, the worker can easily lift the closing plate 27 and the existing electromagnetic contactor 13.

[0048] Next, the two workers carrying the blocking plate 27 and the existing electromagnetic contactor 13 stand with the pair of bars 28 between them in a direction perpendicular to the longitudinal direction of each of the bars 28. With the existing electromagnetic contactor 13 placed on the upper surface of the blocking plate 27, the two workers carry the blocking plate 27 down onto the pair of bars 28 lined up on the floor. At this time, the blocking plate 27 is carried down onto the pair of bars 28 so that the side edges 31a and 31b of the blocking plate 27 are aligned along the longitudinal direction of each of the bars 28. Since there are no bars 28 below the side edges 31a and 31b held by the workers, the workers can easily carry the blocking plate 27 down onto the pair of bars 28.

[0049] Next, the worker removes the existing electromagnetic contactor 13 from the upper surface of the blocking plate 27. Thereafter, the worker places the new electromagnetic contactor 13 on the upper surface of the blocking plate 27.

[0050] Next, the two workers stand with the pair of bars 28 between them in a direction perpendicular to the longitudinal direction of each bar 28. The two workers lift the blocking plate 27 from above the pair of bars 28 arranged on the floor surface, with the new electromagnetic contactor 13 placed on the upper surface of the blocking plate 27. The workers place the blocking plate 27 so that it spans between the front edge of the first opening 14 and the rear edge of the first opening 14, with the new electromagnetic contactor 13 placed on the upper surface of the blocking plate 27. At this time, the workers may move the blocking plate 27 to the rear side by sliding the flat lower surface of the blocking plate 27 on the front beam 20. The workers may also move the blocking plate 27 to the left side of the control panel 8 so that the side edge 31a of the blocking plate 27 is located above the side beam 22 of the mounting frame 12.

[0051] Next, the worker stands the newly installed electromagnetic contactor 13 from the front on the upper surface of the blocking plate 27. At this time, the worker may stand the newly installed electromagnetic contactor 13 from the front using the lower end portion of the newly installed electromagnetic contactor 13 as a fulcrum.

[0052] Next, as shown in FIG. 10, the worker places one of the rods 28 on the upper surface of the blocking plate 27 facing in the left-right direction. At this time, the worker places the rod 28 in front of the electromagnetic contactor 13 raised from the front. When the lengths of the pair of rods 28 are different from each other, the worker places the shorter rod 28 on the upper surface of the blocking plate 27 facing in the left-right direction. After that, the worker places the other rod 28 on top of the rod 28 facing in the left-right direction, facing in the front-rear direction. The worker inserts the rear end of the rod 28 placed on the upper side below the newly installed electromagnetic contactor 13. After that, the worker moves the front end of the rod 28 placed on the upper side up and down to adjust the vertical position of the newly installed electromagnetic contactor 13. That is, the worker uses the upper rod 28 as a lever with the part that contacts the lower rod 28 as the fulcrum, the front end as the force point, and the rear end as the action point, to adjust the vertical position of the new electromagnetic contactor 13. The worker adjusts the vertical position of the new electromagnetic contactor 13 so as to align the mounting surface 15 and the mounting position of the fastener 16 of the new contactor.

[0053] Next, the worker attaches the new electromagnetic contactor 13 to the mounting surface 15 by tightening the fasteners 16 .

[0054] Next, the worker removes the pair of bars 28 and the closing plate 27 from the mounting base 12 .

[0055] Next, the worker passes the lead wire 23 drawn from the newly installed electromagnetic contactor 13 through the first opening 14. After connecting the lead wire 23 to the lower device 24 and performing any necessary inspections, the worker closes the lid 18 of the cover 17 and the door 11 of the cabinet 10.

[0056] As described above, the replacement aid 26 according to the first embodiment is used for replacing the electromagnetic contactor 13 of the elevator 1. The electromagnetic contactor 13 is attached to the front side of the mounting surface 15 included in the mounting base 12. The mounting surface 15 is a surface that is parallel to the up-down direction and the left-right direction and perpendicular to the front-rear direction. The mounting base 12 forms the edge of the first opening 14 that opens in the up-down direction below the mounting surface 15. The replacement aid 26 includes a closing plate 27. The closing plate 27 is in the shape of a plate having a front edge 29 and a rear edge 30 that are parallel to each other. In the closing plate 27, the length between the front edge 29 and the rear edge 30 is longer than the length of the first opening 14 in the front-rear direction. The rear edge 30 of the closing plate 27 is placed on the rear edge of the first opening 14. The front edge 29 of the closing plate 27 is placed on the front edge of the first opening 14. The blocking plate 27 is disposed below the electromagnetic contactor 13 and spans between the front edge of the first opening 14 and the rear edge of the first opening 14 . In the replacement method according to the first embodiment, the closing plate 27 is placed below the existing electromagnetic contactor 13 so as to span between the front edge of the first opening 14 and the rear edge of the first opening 14. Then, the existing electromagnetic contactor 13 is removed from the mounting surface 15. Then, the existing electromagnetic contactor 13 is placed on the upper surface of the closing plate 27 by tilting it forward. Then, the closing plate 27 is carried down from the mounting frame 12 with the existing electromagnetic contactor 13 still placed on the upper surface of the closing plate 27. Then, the existing electromagnetic contactor 13 is lowered from the upper surface of the closing plate 27, and the new electromagnetic contactor 13 is placed on the upper surface of the closing plate 27. Then, with the new electromagnetic contactor 13 still placed on the upper surface of the closing plate 27, the closing plate 27 is placed so as to span between the front edge of the first opening 14 and the rear edge of the first opening 14. Thereafter, the new electromagnetic contactor 13 is raised from the front on the upper surface of the closing plate 27. Thereafter, the new electromagnetic contactor 13 is attached to the mounting surface 15. Thereafter, the closing plate 27 is removed from the mounting base 12.

[0057] With this configuration, the first opening 14 below the electromagnetic contactor 13 is blocked by the blocking plate 27, so that the electromagnetic contactor 13 or its accessories are less likely to fall from the first opening 14. This reduces the workload of workers. Also, the electromagnetic contactor 13, which is a heavy object, can be carried out from the mounting stand 12 in a state where it is laid down on the blocking plate 27, improving the workability of the replacement work.

[0058] In addition, the front edge of the first opening 14 is the front beam 20 of the mounting frame 12. The length between the front side 29 and the rear side 30 of the closing plate 27 is longer than the length in the front-rear direction from the rear edge of the first opening 14 to the front end of the front beam 20.

[0059] With this configuration, the front edge 29 of the closing plate 27 protrudes forward from the front end of the front beam 20 of the mounting base 12, so that the worker can more easily lift the closing plate 27 with the existing electromagnetic contactor 13 placed on it from the mounting base 12. This further improves the workability of the replacement work.

[0060] Further, one of the left and right edges of the first opening 14 is the side beam 22 of the mounting frame 12. The mounting frame 12 has a vertical pillar 25 that protrudes from the side beam 22 toward the first opening 14 in the horizontal projection plane. In the closing plate 27, a side edge 31a perpendicular to the front edge 29 and the rear edge 30 is provided with a notch 32 that follows the shape of the vertical pillar 25 in the horizontal projection plane. The side edge 31a is placed on the side beam 22.

[0061] With this configuration, the sides of the first opening 14 are also blocked by the blocking plate 27, making it more difficult for the electromagnetic contactor 13 or its accessories to fall off, and further reducing the workload of the worker. In addition, three sides of the blocking plate 27, the front side 29, the rear side 30, and the side side 31a, are placed on the mounting base 12, so that the blocking plate 27 is more stably supported. This further improves the workability of the replacement work.

[0062] In addition, the outer periphery of the closing plate 27 is chamfered.

[0063] With this configuration, the closing plate 27 is less likely to damage the cabinet 10 and the various parts of the control panel 8, such as the electromagnetic contactor 13. In addition, since the outer periphery of the closing plate 27 is less likely to get caught, the workload of the worker who handles the closing plate 27 is further reduced.

[0064] The replacement aid 26 also includes a pair of bars 28. The longitudinal length of each of the bars 28 is longer than the distance between the front side 29 and the rear side 30 of the closing plate 27. In addition, in the replacement method using the replacement auxiliary tool 26, the blocking plate 27 is carried down from the mounting frame 12 onto a pair of rods 28 arranged parallel to each other, with the existing electromagnetic contactor 13 placed on the upper surface of the blocking plate 27. After the newly installed control device is raised from the front on the upper surface of the blocking plate 27, one of the rods 28 is placed on the upper surface of the blocking plate 27 facing left and right. The other rod 28 is placed on top of it facing forward and backward. The rear end of the upper rod 28 is placed below the newly installed electromagnetic contactor 13. The vertical position of the newly installed electromagnetic contactor 13 is adjusted by moving the front end of the upper rod 28 up and down. Then, the new electromagnetic contactor 13 is attached to the mounting surface 15. Then, the pair of rods 28 and the blocking plate 27 are removed from the mounting frame 12.

[0065] This configuration allows the worker to more easily place the blocking plate 27 on the floor or the like. In addition, the position of the electromagnetic contactor 13, which is a heavy object, can be adjusted using the pair of rods 28 as a lever, further reducing the worker's workload. The rods 28 used to temporarily place the blocking plate 27 can also serve as the rods 28 used as a lever. This reduces the number of tools to be brought to the work site, reducing the worker's workload.

[0066] The electromagnetic contactor 13 is stored in the cover 17. The cover 17 has a second opening 19 that opens forward. In this case, the length of the rear edge 30 of the blocking plate 27 may be shorter than the length of the second opening 19 in the left-right direction. This allows the blocking plate 27 to be inserted into the inside of the cover 17 from the second opening 19. Therefore, even when the lower end of the cover 17 is lower than the first opening 14 and when the lower surface of the cover 17 is not open, the blocking plate 27 can be inserted below the electromagnetic contactor 13 to block the first opening 14. Here, the edge of the first opening 14 on which the blocking plate 27 is placed may be something other than the beam of the mounting frame 12. The edge of the first opening 14 may be a bolt or a rib that protrudes toward the inside of the cabinet 10. The edge of the first opening 14 on which the blocking plate 27 is placed may be, for example, a part of the cabinet 10 or a part of the equipment in the cabinet 10, such as the cover 17.

[0067] Embodiment 2 In the second embodiment, differences from the example disclosed in the first embodiment will be described in particular detail. For features not described in the second embodiment, any of the features of the example disclosed in the first embodiment may be adopted.

[0068] FIG. 11 is a perspective view of the replacement aid 26 according to the second embodiment.

[0069] The closing plate 27 has handles 34 on both the left and right sides of the upper surface. The handles 34 are attached from the upper surface side. The handles 34 are, for example, semicircular, semielliptical, semioval, or trapezoidal. The handles 34 do not protrude from the lower surface of the closing plate 27. That is, the lower surface of the closing plate 27 is a flat plane. The handles 34 are attached to the upper surface of the closing plate 27 by, for example, welding. The handles 34 may be provided on only one of the left and right sides of the closing plate 27.

[0070] With this configuration, a worker can more easily lift the blocking plate 27 with the existing electromagnetic contactor 13 placed on it from the mounting stand 12 by holding the handle 34. This further improves the workability of the replacement work. Also, since the bottom surface of the blocking plate 27 is flat, a worker can easily move the blocking plate 27 back and forth by sliding it on the front beam 20. Since the blocking plate 27 can be moved back and forth while the weight of the blocking plate 27 and the existing electromagnetic contactor 13 is placed on the front beam 20, the workload of the worker is further reduced. [Industrial Applicability]

[0071] The replacement aid and replacement method according to the present disclosure can be applied to the replacement work of elevator control equipment. [Explanation of symbols]

[0072] 1 elevator, 2 hoistway, 3 machine room, 4 hoist, 5 main rope, 6 cage, 7 counterweight, 8 control panel, 9 drive sheave, 10 cabinet, 11 door, 12 mounting frame, 13 electromagnetic contactor, 14 first opening, 15 mounting surface, 16 fastener, 17 cover, 18 lid, 19 second opening, 20 front beam, 21 rear beam, 22 side beam, 23 lead wire, 24 lower equipment, 25 vertical column, 26 replacement auxiliary tool, 27 cover plate, 28 bar, 29 front edge, 30 rear edge, 31a, 31b side edges, 32 notch, 33 marker, 34 handle

Claims

1. An auxiliary replacement tool for elevator control equipment is attached to the front side of a mounting base including a mounting surface that is parallel to the vertical and horizontal directions and perpendicular to the front-rear direction and forms an edge of a first opening that opens in the vertical direction below the mounting surface, a cover plate having a plate-like shape with a front side and a rear side parallel to each other, the length between the front side and the rear side being longer than the length of the first opening in the front-to-rear direction, the rear side being placed on the rear edge of the first opening, the front side being placed on the front edge of the first opening, and the cover plate being bridged between the front edge of the first opening and the rear edge of the first opening below the control device; An exchange aid that includes:

2. a front edge of the first opening is a front beam of the mounting frame; The length between the front side and the rear side is longer than the length in the front-rear direction from the rear edge of the first opening to the front end of the front beam. The replacement aid according to claim 1.

3. the control device is housed in a cover having a second opening that opens forward; The length of the rear side is shorter than the length of the second opening in the left-right direction.

3. The replacement aid according to claim 1 or 2.

4. an edge on one of the left and right sides of the first opening is a side beam of the mounting frame; The mounting base has a protruding portion that protrudes from the side beam toward the first opening in a horizontal projection plane, In the closing plate, a notch is provided on a side edge perpendicular to the front edge and the rear edge, the notch being aligned with the shape of the protrusion in a horizontal projection plane; The side edge is placed on the side beam.

3. The replacement aid according to claim 1 or 2.

5. The outer periphery of the blocking plate is chamfered.

3. The replacement aid according to claim 1 or 2.

6. The closing plate has a handle attached from the upper surface side on one or both of the left and right sides of the upper surface, The lower surface of the blocking plate is flat.

3. The replacement aid according to claim 1 or 2.

7. A pair of bars whose longitudinal length is longer than the length between the front side and the rear side. The replacement aid according to claim 1 or 2, comprising:

8. A method for replacing the control device using the replacement aid according to claim 1 or claim 2, placing the blocking plate below the existing control device so as to span between a front edge of the first opening and a rear edge of the first opening; Removing the existing control device from the mounting surface; placing the existing control device on the upper surface of the closing plate so as to tilt the existing control device forward; carrying the closing plate down from the mounting stand while the existing control device is placed on an upper surface of the closing plate; removing the existing control device from the upper surface of the closing plate and placing the newly installed control device on the upper surface of the closing plate; placing the closing plate so as to span between a front edge of the first opening and a rear edge of the first opening while the newly installed control device is placed on an upper surface of the closing plate; Raising the newly installed control device from the front on the upper surface of the closing plate; Attaching the newly installed control device to the attachment surface; removing the blocking plate from the mounting rack; The exchange method includes:

9. A method for replacing the control device using the replacement aid according to claim 7, placing the blocking plate below the existing control device so as to span between a front edge of the first opening and a rear edge of the first opening; Removing the existing control device from the mounting surface; placing the existing control device on the upper surface of the closing plate so as to tilt the existing control device forward; carrying the closing plate from the mounting stand down onto the pair of rods arranged in parallel with each other while placing the existing control device on an upper surface of the closing plate; removing the existing control device from the upper surface of the closing plate and placing the newly installed control device on the upper surface of the closing plate; placing the closing plate so as to span between a front edge of the first opening and a rear edge of the first opening while the newly installed control device is placed on an upper surface of the closing plate; Raising the newly installed control device from the front on the upper surface of the closing plate; one of the pair of rods is placed on the upper surface of the blocking plate facing in the left-right direction, the other of the pair of rods is placed on top of the one of the pair of rods facing in the front-to-rear direction, the rear end of the upper one of the pair of rods is placed below the newly installed control device, and the front end of the upper one of the pair of rods is moved up and down to adjust the vertical position of the newly installed control device; Attaching the newly installed control device to the attachment surface; removing the pair of bars and the closing plate from the mounting rack; The exchange method includes:

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