Elevator and method for inspecting the same

Abstract

To provide an elevator that can prevent a worker from releasing a brake on a car even when the movement of the car in operation is restricted by a car stopper device, and that improves safety.SOLUTION: An elevator comprises a car stopper device, a restriction plate, and a brake releasing circuit. The car stopper device has a stopper receiving bracket installed on the top of a car and fixed to the top of the car, a rod-shaped stopper pin movably supported by the stopper receiving bracket, and a sensor installed at one tip of the stopper pin. The restriction plate is fixed to a guide rail of the elevator, has a though hole formed, and has a detection body detected by a sensor installed adjacent to the through hole. The brake releasing circuit enables release of the brake during an elevator maintenance work. When the sensor detects the detection body, the brake releasing circuit enables opening of a brake of the elevator.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an elevator and an inspection method thereof, and more particularly to an elevator and an inspection method thereof suitable for ensuring the safety of workers during elevator maintenance or inspection work on the elevator car. [Background technology]

[0002] Typically, in a machine room-less elevator, maintenance or inspection work for the elevator is performed by a worker standing on top of the elevator car.

[0003] In order to allow workers to safely perform maintenance or inspection work on the elevator while standing on the car, a car stopper device installed on the top of the car is used to restrict the movement of the car during work.

[0004] Patent Document 1 describes an elevator equipped with a mechanism for restricting dangerous movements of the elevator during such elevator maintenance or inspection work.

[0005] Patent Document 1 describes an elevator that is equipped with a car, a guide section that guides the raising and lowering of the car, and a movement restriction mechanism that has an engaging section provided on the car and an engaged section that engages with the engaging section, so as to make maintenance or inspection work on the elevator easy while ensuring safety, wherein the engaged section has an engaging base supported by the guide section, a through hole formed in the engagement base and passing through in a transverse direction that intersects with the raising and lowering direction of the car, and an adjustment section that restricts movement of the engaging section, wherein the engaging section moves along the transverse direction and can be set to a state where it is inserted into the through hole and a state where it is removed from the through hole, and the adjustment section covers an upper part of the through hole and is supported by the engagement base so as to be movable between a position where it contacts the engaging section inserted into the through hole and a position where it does not contact the engaging section inserted into the through hole. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2018-104117 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, in order to allow workers to safely perform maintenance or inspection work on the elevator from inside the car, a car stopper device is used to restrict the movement of the car during work. However, because the car stopper device and the brake release circuit, which is responsible for releasing the elevator brake, are not linked, workers can release the brake from inside the car regardless of the state of the car stopper device, which could put workers working on top of the car in a very dangerous situation.

[0008] The above-mentioned Patent Document 1 does not disclose any measures to solve the above-mentioned problems.

[0009] The present invention has been made in consideration of the above-mentioned points, and an object of the present invention is to provide an elevator and an inspection method thereof that improve safety by preventing workers from releasing the brake on the car even when a car stopper device is used to restrict the movement of the car during work. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the elevator of the present invention is an elevator comprising an elevator car and a guide rail that supports the elevator car so that it can rise and fall, and is further equipped with a car stopper device having a stopper receiving bracket installed on the top of the car and fixed to the top of the car, a rod-shaped stopper pin that is movably supported on the stopper receiving bracket, and a sensor installed at one end of the stopper pin, a regulating plate fixed to the guide rail of the elevator, having a through hole formed therein, and a detection object that is detected by the sensor is installed adjacent to the through hole, and a brake release circuit that is capable of releasing the brake during elevator maintenance work, and is characterized in that the brake release circuit enables the release of the brake of the elevator when the sensor detects the detection object.

[0011] In order to achieve the above object, the elevator inspection method of the present invention is a method for inspecting an elevator using an elevator inspection device equipped with a car stopper device installed on the upper part of the elevator car to regulate the movement of the car, and when inspecting the elevator, the method includes the steps of: inspecting an elevator using an elevator inspection device equipped with a car stopper device installed on the upper part of the elevator car to regulate the movement of the car; inspecting the elevator using an elevator inspection device equipped with a regulating plate fixed to a guide rail of the elevator and having a through hole formed therein; a stopper receiving bracket fixed to the upper part of the car; a rod-shaped stopper pin movably supported by the stopper receiving bracket; a sensor and a switch installed at one end of the stopper pin; The car stopper device comprises a detection body installed adjacent to the through hole, and a fixed bracket installed on the upper part of the car approximately parallel to the stopper pin, in which a first groove in which the lever is stored before the stopper pin operates and a second groove in which the lever is stored when the stopper pin operates, are formed at a predetermined interval in the moving direction of the stopper pin, and is characterized in that only when the stopper pin passes through the through hole and the lever is stored in the second groove, the sensor approaches the detection body until the switch becomes conductive, causing the switch to become conductive and connecting a brake release circuit that is responsible for releasing the brake of the elevator, thereby allowing the brake release operation of the elevator to be performed. Effect of the Invention

[0012] According to the present invention, even if the car stopper device restricts the movement of the car during work, it is possible to prevent workers from releasing the brake while on the car, thereby improving safety. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a plan view showing a car stopper device provided in an elevator according to a first embodiment of the present invention. [Diagram 2]1 is a plan view showing the state before the lever is stored in the second groove during the elevator brake release operation in the car stopper device provided in the elevator embodiment 1 of the present invention. FIG. [Diagram 3] FIG. 3 is a side view of FIG. 2. [Figure 4] 1 is a plan view showing a state in which the lever is stored in the second groove during the elevator brake release operation in the car stopper device provided in the elevator embodiment 1 of the present invention. FIG. [Diagram 5] FIG. 5 is a side view of FIG. [Figure 6] 6 is a view of the regulating plate in the state shown in FIG. 4 and FIG. 5 (the state in which the lever is stored in the second groove) as viewed from the car side. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The elevator and its inspection method of the present invention will be described below based on the illustrated embodiment. Note that the same reference numerals are used for the same components in each drawing. EXAMPLES

[0015] The elevator of the first embodiment of the present invention is equipped with a car stopper device that is installed on the top of the elevator car and restricts the movement of the car when a worker performs maintenance or inspection work.

[0016] FIG. 1 shows a schematic configuration of a car stopper device 100 provided in an elevator of the first embodiment.

[0017] As shown in FIG. 1, the car stopper device 100 provided in the elevator of the first embodiment includes a regulating plate 2 fixed to the guide rail of the elevator and having a through hole 2a formed therein, a substantially U-shaped stopper receiving bracket 4 fixed to the upper part of the car, a rod-shaped stopper pin 5 movably supported on the stopper receiving bracket 4, a sensor 6a and a switch 6b installed at one end of the stopper pin 5, a lever 7 installed at the other end of the stopper pin 5, a detection body 9 (see FIG. 6) installed adjacent to the through hole 2a of the regulating plate 2, and a detection unit 100 (see FIG. 7) installed at the upper part of the car substantially parallel to the stopper pin 5 and detecting the movement of the stopper pin 5 before the operation of the stopper pin 5 (stopper The connector is generally composed of: a fixed bracket 8 in which a first groove 8a in which the lever 7 is stored when the stopper pin 5 is in a stored state (when the stopper pin 5 is in a protruding state) and a second groove 8b in which the lever 7 is stored when the stopper pin 5 is in an operating state (when the stopper pin 5 is in a protruding state) are formed at a predetermined interval in the moving direction of the stopper pin 5 (indicated by arrow A); and a cover 10 fixed to the fixed bracket 8 and covering at least the connection portion between the first short connector 104a and the first connector 105a, the connection portion between the second short connector 104b and the second connector 105b, and the connection portion between the second short connector 104b and the third connector 105c when the first short connector 104a and the first connector 105a described below are connected.

[0018] In this embodiment, the sensor 6a is a magnetic sensor and the detection body 9 is a magnet, but a different sensor 6a and detection body 9 may also be used.

[0019] In this embodiment, the sensor 6a is disposed in a position where it detects the magnetic field of the detection body (magnet) 9, which is equal to or greater than a predetermined value, causing the switch 6b to conduct only when the stopper pin 5 passes through the through hole 2a and the lever 7 is housed in the second groove 8b. When the sensor 6a detects the magnetic field of the detection body (magnet) 9, which is equal to or greater than a predetermined value, the switch 6b conducts and connects a brake release circuit (installed on a control panel, not shown) that is responsible for releasing the elevator brake, allowing the elevator brake release operation to be performed.

[0020] Furthermore, in this embodiment, the above-mentioned period before the operation of the stopper pin 5 (stopper pin 5 is in a stored state) refers to the normal operation of the elevator, and the period when the stopper pin 5 is in operation (stopper pin 5 is in a protruding state) refers to the time when the elevator brake is being released or when the elevator is being operated for maintenance.

[0021] In addition, the lever 7 is provided with the above-mentioned first short connector 104a and a second short connector 104b connected to the sensor 6a and the switch 6b, and the fixed bracket 8 is provided with a first connector 105a connected to the elevator brake release circuit adjacent to the first groove 8a, and a second connector 105b and a third connector 105c connected to the elevator brake release circuit adjacent to the second groove 8b.

[0022] During normal operation of the elevator (before the stopper pin 5 operates (stopper pin 5 is in a stored state)), the first short connector 104a and the first connector 105a are electrically connected with the lever 7 stored in the first groove 8a, and during the elevator brake release operation (when the stopper pin 5 operates (stopper pin 5 is in a protruding state)), the second short connector 104b and the second connector 105b are electrically connected with the lever 7 stored in the second groove 8b, and during maintenance operation of the elevator (when the stopper pin 5 operates (stopper pin 5 is in a protruding state)), the second short connector 105b and the third connector 105c are electrically connected with the lever 7 stored in the second groove 8b.

[0023] Before the stopper pin 5 operates (when the stopper pin 5 is in a stored state), the lever 7 is in the upper position and is not stored in the first groove 8a formed in the fixed bracket 8.

[0024] Next, before the stopper pin 5 operates (the stopper pin 5 is in the stored state), the lever 7 is lowered and stored in the first groove 8a formed in the fixed bracket 8. At this time, the first short connector 104a and the first connector 105a are connected.

[0025] Then, after the maintenance work is completed before the operation of the stopper pin 5 (when the stopper pin 5 is in the stored state), with the first short connector 104a and the first connector 105a connected, the cover 10 is attached to the fixed bracket 8 so as to cover the connection portion of the connectors.

[0026] When the stopper pin 5 is in operation (when the stopper pin 5 is in a protruding state), the stopper pin 5 moves to the right and the right end portion of the stopper pin 5 penetrates the through hole 2a of the regulating plate 2.

[0027] When the elevator brake is released (when the stopper pin 5 is operating (when the stopper pin 5 is protruding)), the lever 7 is lowered downward and stored in the second groove 8b, and the second short connector 104b and the second connector 105b are electrically connected, and when the elevator is undergoing maintenance operation (when the stopper pin 5 is operating (when the stopper pin 5 is protruding)), the lever 7 is stored in the second groove 8b, and the second short connector 105b and the third connector 105c are electrically connected.

[0028] 2 and 3 show a state before the lever 7 is stored in the second groove 8b during an elevator brake release operation (when the stopper pin 5 is in operation (when the stopper pin 5 is in a protruding state)).

[0029] As shown in FIGS. 2 and 3, before the lever 7 is housed in the second groove 8b, the first and second short connectors 104a and 104b and the second and third connectors 105b and 105c are not connected to each other.

[0030] 4 and 5 show a state in which the lever 7 is housed in the second groove 8b during an elevator brake release operation (when the stopper pin 5 is in operation (when the stopper pin 5 is in a protruding state)).

[0031] As shown in FIGS. 4 and 5, when the lever 7 is housed in the second groove 8b, the second short connector 104b and the second connector 105b are connected to each other.

[0032] FIG. 6 shows the regulating plate 2 in the state shown in FIGS. 4 and 5 (the state in which the lever 7 is housed in the second groove 8b) as viewed from the car side.

[0033] As shown in the figure, the sensor 6a is disposed so as to be directly above the detection body (magnet) 9 when the lever 7 is housed in the second groove 8b.

[0034] Next, a method for inspecting an elevator equipped with the car stopper device 100 for restricting the movement of the car will be described.

[0035] That is, the elevator inspection method in this embodiment is such that, when inspecting an elevator using an elevator inspection device equipped with a car stopper device 100 that is installed on the upper part 3a of the elevator car 3 and restricts the movement of the car 3, using the car stopper device 100 configured as described above, only when the stopper pin 5 passes through the through hole 2a and the lever 7 is stored in the second groove 8b, the sensor 6a approaches the detection body (magnet) 9 until the switch 6b becomes conductive, and the switch 6b becomes conductive to connect the brake release circuit (installed on a control panel not shown) that is responsible for releasing the elevator brake, allowing the elevator brake release operation to be performed.

[0036] Specifically, during normal operation of the elevator (before the stopper pin 5 operates (stopper pin 5 is in a stored state)), the first short connector 104a and the first connector 105a are electrically connected with the lever 7 stored in the first groove 8a, during the elevator brake release operation (when the stopper pin 5 operates (stopper pin 5 is in a protruding state)), the second short connector 104b and the second connector 105b are electrically connected with the lever 7 stored in the second groove 8b, and during maintenance operation of the elevator (when the stopper pin 5 operates (stopper pin 5 is in a protruding state)), the second short connector 105b and the third connector 105c are electrically connected with the lever 7 stored in the second groove 8b.

[0037] Before the stopper pin 5 operates (stopper pin 5 is in a stored state), the lever 7 is in the upper position and is not stored in the first groove 8a formed in the fixed bracket 8. Next, when the stopper pin 5 operates (stopper pin 5 is in a protruding state), the lever 7 is lowered and stored in the second groove 8b formed in the fixed bracket 8. At this time, the second short connector 104b and the second connector 105b are connected, allowing the elevator brake release operation to be performed.

[0038] By adopting this embodiment, the elevator brake can be released only when the stopper pin 5 protrudes and penetrates the regulating plate 2. In other words, when the stopper pin 5 does not penetrate the regulating plate 2, an operator cannot release the elevator brake while standing on the car, thereby improving safety.

[0039] Therefore, according to this embodiment, even if the car stopper device 100 restricts the movement of the car during work, it is possible to prevent the worker from releasing the brake on the car, thereby improving safety. The present invention is not limited to the above-described embodiments, and includes various modified examples. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the configurations described. It is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace a part of the configuration of each embodiment with another configuration. [Explanation of symbols]

[0040] 2...regulating plate, 2a...through hole in regulating plate, 4...stopper receiving bracket, 5...stopper pin, 6a...sensor, 6b...switch, 7...lever, 8...fixing bracket, 8a...first groove, 8b...second groove, 9...detection body (magnet), 10...cover, 100...car stopper device, 104a...first short connector, 104b...second short connector, 105a...first connector, 105b...second connector, 105c...third connector.

Claims

1. An elevator comprising an elevator car and a guide rail that supports the elevator car so that the elevator car can rise and fall, a car stopper device that is installed on an upper portion of the car and includes a stopper receiving bracket that is fixed to an upper portion of the car, a rod-shaped stopper pin that is movably supported on the stopper receiving bracket, and a sensor that is installed on one tip of the stopper pin; A regulating plate fixed to a guide rail of the elevator, having a through hole formed therein, and a detection body to be detected by the sensor being installed adjacent to the through hole; A brake release circuit that can release the brake during elevator maintenance work, An elevator, characterized in that the brake release circuit enables the release of the elevator brake when the sensor detects the detection object.

2. 2. The elevator according to claim 1, a fixed bracket that is installed on an upper portion of the car approximately parallel to the stopper pin, the fixed bracket having a first groove in which a lever is accommodated before the stopper pin is operated and a second groove in which the lever is accommodated when the stopper pin is operated, the first groove being formed at a predetermined interval in the moving direction of the stopper pin; An elevator characterized in that the detection body is installed in a position where the sensor can detect it when the stopper pin passes through the through hole and the lever is stored in the second groove.

3. 3. The elevator according to claim 2, An elevator, characterized in that the sensor is installed so as to be directly above the detection body when the lever is stored in the second groove.

4. An elevator according to claim 2 or 3, An elevator characterized in that the period before the stopper pin operates refers to the normal operation of the elevator, and the period when the stopper pin operates refers to the brake release operation of the elevator or the maintenance operation of the elevator.

5. 4. The elevator according to claim 3, A first short connector and a second short connector connected to the sensor and the switch are installed on the lever, and a first connector connected to the brake release circuit of the elevator adjacent to the first groove, and second and third connectors connected to the brake release circuit of the elevator adjacent to the second groove are installed on the fixing bracket, An elevator characterized in that, during normal operation of the elevator, the first short connector and the first connector are electrically connected with the lever stored in the first groove, during a brake release operation of the elevator, the second short connector and the second connector are electrically connected with the lever stored in the second groove, and during maintenance operation of the elevator, the second short connector and the third connector are electrically connected with the lever stored in the second groove.

6. 6. The elevator according to claim 5, An elevator characterized in that it is fixed to the fixed bracket and includes a cover that covers at least the connection portion between the first short connector and the first connector, the connection portion between the second short connector and the second connector, and the connection portion between the second short connector and the third connector when the first short connector and the first connector are connected.

7. An elevator inspection method for inspecting an elevator using an elevator inspection device having a car stopper device installed on an upper portion of the elevator car to restrict movement of the elevator car, comprising: When inspecting the elevator, the elevator car stopper device is used, which comprises: a regulating plate fixed to a guide rail of the elevator and having a through hole formed therein; a stopper receiving bracket fixed to an upper portion of the elevator car; a rod-shaped stopper pin movably supported on the stopper receiving bracket; a sensor and a switch installed at one end of the stopper pin; a lever installed at the other end of the stopper pin; a detection body installed adjacent to the through hole of the regulating plate; and a fixed bracket installed at the upper portion of the elevator car approximately parallel to the stopper pin, in which a first groove in which the lever is accommodated before the stopper pin is operated and a second groove in which the lever is accommodated when the stopper pin is operated are formed at a predetermined interval in the moving direction of the stopper pin, An elevator inspection method characterized in that only when the stopper pin passes through the through hole and the lever is stored in the second groove, the sensor approaches the detection body until the switch becomes conductive, causing the switch to become conductive and connecting a brake release circuit that is responsible for releasing the elevator brake, thereby allowing the elevator brake release operation to be performed.

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