Portable pit safety switch device

Abstract

To obtain an in-pit portable safety switch device capable of more rapidly stopping a car.SOLUTION: An in-pit portable safety switch device 3 comprises a connector 301 provided in an in-pit safety switch 2 connected to an in-pit safety circuit 602, a cable 302 connected to the connector 301, and a portable switch 304 connected to the connector 301 via the cable 302. The state of the in-pit safety circuit 602 can be switched between the conduction state where the in-pit safety circuit 602 is in a conductive state and the cut-off state where the in-pit safety circuit 602 is in the cut-off state by operating the portable switch 304 in the state that the portable switch 304 is connected to the in-pit safety circuit 602 via the in-put safety switch 2, the connector 301, and the cable 302.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to a portable pit safety switch device. [Background technology]

[0002] Conventionally, a pit safety switch provided on the side wall of a pit has been known. A pit safety circuit is connected to the pit safety switch. When the pit safety switch is operated by an operator, the state of the pit safety circuit is switched between a conductive state and a cut-off state (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-46473 Summary of the Invention [Problem to be solved by the invention]

[0004] During maintenance and inspection work to detect abnormal sounds while the car is raised and lowered, a worker enters the pit as the car rises and falls. When the distance between the car and the pit floor falls below a preset value, the worker in the pit operates the pit safety switch, which shuts off the pit safety circuit. When the pit safety circuit shuts off, the car stops.

[0005] However, there are cases where a worker performs maintenance and inspection work in the pit, detecting an abnormal sound, while in a location away from the pit safety switch. In this case, with the configuration described in Patent Document 1, it takes a long time for the worker to operate the pit safety switch after the distance between the car and the pit floor falls below a preset value. This causes a problem of delays in stopping the car.

[0006] The present disclosure has been made to solve the above-mentioned problems, and its object is to provide an in-pit safety portable switch device that can stop the car more quickly. [Means for solving the problem]

[0007] The pit safety portable switch device according to the present disclosure includes a connector provided on a pit safety switch connected to a pit safety circuit, a cable connected to the connector, and a portable switch connected to the connector via the cable. a warning device provided in the housing provided with the portable switch, which warns when the distance between the cage or the counterweight and the floor of the pit becomes equal to or less than a preset value; When the portable switch is operated while connected to the pit safety circuit via the pit safety switch, connector and cable, the state of the pit safety circuit is switched between a conductive state in which the pit safety circuit is conductive and a disconnected state in which the pit safety circuit is disconnected. [Effects of the Invention]

[0008] The pit safety portable switch device of the present disclosure allows the car to stop more quickly. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a configuration diagram showing an elevator device equipped with a pit safety portable switch device according to embodiment 1. FIG. [Figure 2] 2 is an enlarged view showing the pit safety portable switch device of FIG. 1. [Figure 3] FIG. 2 is a block diagram showing the elevator device of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0010] Embodiment 1 Fig. 1 is a configuration diagram showing an elevator apparatus equipped with an in-pit safety portable switch device according to embodiment 1. Fig. 2 is an enlarged view showing the in-pit safety portable switch device of Fig. 1. Fig. 3 is a block diagram showing the elevator apparatus of Fig. 1. The elevator apparatus includes a car 1, an in-pit safety switch 2, an in-pit safety portable switch device 3, a first end point switch 4, a second end point switch 5, and an elevator control panel 6.

[0011] The car 1 moves up and down in the elevator shaft 7. The car 1 is provided with an operation panel (not shown). The operation panel for the car 1 is operated by an operator 8 inside the car 1. The operator 8 operates the operation panel for the car 1, causing the car 1 to move up and down.

[0012] The in-pit safety switch 2 is provided in the pit 9. The in-pit safety switch 2 has a housing 201, a lever 202, and a connector 203.

[0013] The housing 201 is provided on a side wall 901 of the pit 9. The lever 202 and the connector 203 are each provided on the housing 201. The lever 202 is operated by a worker 10 inside the pit 9. The connector 203 is connected to an in-pit safety circuit 602, which will be described later.

[0014] The in-pit safety portable switch device 3 has a connector 301 , a cable 302 , a housing 303 , a portable switch 304 , a warning device 305 , and a winding device 306 .

[0015] The connector 301 is detachably attached to the connector 203. The cable 302 is connected to the connector 301.

[0016] The housing 303 is carried by a worker 10 in the pit 9. The portable switch 304 and the warning device 305 are each provided in the housing 303. The portable switch 304 and the warning device 305 are each connected to a connector 301 via a cable 302.

[0017] The portable switch 304 is operated by a worker 10 in the pit 9. The portable switch 304 has a make contact. The operation of the portable switch 304 by the worker 10 includes pressing the portable switch 304 and releasing the portable switch 304. When the portable switch 304 is pressed, the make contact of the portable switch 304 is turned on. When the portable switch 304 is released, the make contact of the portable switch 304 is turned off.

[0018] The warning device 305 is composed of a lamp. The warning device 305 warns the worker 10 in the pit 9 by lighting up.

[0019] The winding device 306 is provided on the cable 302. The winding device 306 is capable of winding and letting out the cable 302. When the winding device 306 winds the cable 302, the length of the cable 302 from the winding device 306 to the connector 301 is shortened. As a result, the length of the cable 302 from the connector 301 to the housing 303 is shortened. On the other hand, when the winding device 306 lets out the cable 302, the length of the cable 302 from the winding device 306 to the connector 301 is lengthened. As a result, the length of the cable 302 from the connector 301 to the housing 303 is lengthened.

[0020] The total length of the cable 302 is set to a length that allows the worker 10 carrying the housing 303 to move throughout the entire area of ​​the pit 9 when the connector 301 is attached to the connector 203 .

[0021] The winding device 306 is operated by a worker 10 inside the pit 9. The worker 10 operates the winding device 306 so that the length of the cable 302 from the connector 301 to the housing 303 corresponds to the distance between the position of the in-pit safety switch 2 and the position where the worker 10 is located.

[0022] The first end point switch 4 is provided in the elevator shaft 7. The first end point switch 4 is located at a position that is a preset value L1 above the floor surface 902 of the pit 9. When the distance between the car 1 and the floor surface 902 of the pit 9 is equal to or less than the value L1, the car 1 comes into contact with the first end point switch 4. When the car 1 comes into contact with the first end point switch 4, the first end point switch 4 detects that the distance between the car 1 and the floor surface 902 of the pit 9 has become equal to or less than the value L1.

[0023] The second end point switch 5 is provided in the elevator shaft 7. The second end point switch 5 is located at a position that is a preset value L2 above the floor surface 902 of the pit 9. The value L2 is smaller than the value L1. When the distance between the car 1 and the floor surface 902 of the pit 9 is equal to or less than the value L2, the car 1 contacts the second end point switch 5. When the car 1 contacts the second end point switch 5, the second end point switch 5 detects that the distance between the car 1 and the floor surface 902 of the pit 9 is equal to or less than the value L2.

[0024] The elevator control panel 6 has a control unit 601 and an in-pit safety circuit 602. The control unit 601 controls the elevation and lowering of the car 1.

[0025] By attaching connector 301 to connector 203, warning device 305 is connected to control unit 601 via pit safety switch 2, connector 301 and cable 302. Control unit 601 controls warning device 305.

[0026] The control unit 601 is configured to receive the detection results of the first end point switch 4 and the second end point switch 5 .

[0027] When the first end point switch 4 detects that the distance between the car 1 and the floor surface 902 of the pit 9 has become equal to or less than the value L1, the control unit 601 causes the warning device 305 to issue a warning.

[0028] When the second end point switch 5 detects that the distance between the car 1 and the floor surface 902 of the pit 9 has become equal to or less than the value L2, the control unit 601 stops the car 1.

[0029] The state of the in-pit safety circuit 602 can be switched between a conductive state in which the in-pit safety circuit 602 is conductive and a cut-off state in which the in-pit safety circuit 602 is cut off.

[0030] Information indicating the state of the in-pit safety circuit 602 is input from the in-pit safety circuit 602 to the control unit 601. When the in-pit safety circuit 602 is in a conductive state, the control unit 601 allows the car 1 to move up and down. On the other hand, when the in-pit safety circuit 602 is in a cut-off state, the control unit 601 stops the car 1.

[0031] An in-pit safety switch 2 is connected to the in-pit safety circuit 602. By operating the lever 202 of the in-pit safety switch 2, the state of the in-pit safety circuit 602 is switched between a conductive state and a cut-off state.

[0032] By attaching connector 301 to connector 203, portable switch 304 is connected to in-pit safety circuit 602 via in-pit safety switch 2, connector 301 and cable 302.

[0033] When the portable switch 304 is operated while the portable switch 304 is connected to the in-pit safety circuit 602, the state of the in-pit safety circuit 602 is switched between a conductive state and a cut-off state.

[0034] Specifically, when the portable switch 304 is pressed by the worker 10 in the pit 9, the make contact of the portable switch 304 is turned on, and the in-pit safety circuit 602 is brought into a conductive state. On the other hand, when the worker 10 in the pit 9 releases the portable switch 304, the make contact of the portable switch 304 is turned off, and the in-pit safety circuit 602 is brought into a cut-off state. In other words, when the hand of the worker 10 in the pit 9 removes the hand from the portable switch 304, the in-pit safety circuit 602 is brought into a cut-off state.

[0035] Next, the procedure for maintenance and inspection work to detect abnormal sounds while raising and lowering the car 1 using the in-pit safety portable switch device 3 will be described.

[0036] First, worker 8 enters car 1, and worker 10 enters pit 9. Worker 8 in car 1 raises and lowers car 1 by operating the car's control panel. Worker 10 in pit 9 moves around in pit 9 while pressing portable switch 304, checking for any abnormal sounds. Pressing portable switch 304 places in-pit safety circuit 602 in a conductive state, allowing car 1 to rise and fall.

[0037] When the worker 10 in the pit 9 determines that it is necessary to stop the car 1, the worker 10 releases the portable switch 304. This causes the in-pit safety circuit 602 to enter a cutoff state, and the control unit 601 stops the car 1.

[0038] When the distance between the car 1 and the floor surface 902 of the pit 9 becomes equal to or less than a preset value L1, the warning device 305 issues a warning. This notifies the worker 10 in the pit 9 that the distance between the car 1 and the floor surface 902 of the pit 9 has become equal to or less than the preset value L1.

[0039] When the distance between the car 1 and the floor surface 902 of the pit 9 becomes equal to or less than a preset value L2, the control unit 601 stops the car 1.

[0040] When the car 1 has moved over the entire range of its lifting and lowering motion, the maintenance and inspection work of detecting abnormal sounds while lifting and lowering the car 1 is completed.

[0041] As described above, the in-pit safety portable switch device 3 according to the first embodiment includes the connector 301, the cable 302, and the portable switch 304. The connector 301 is provided on the in-pit safety switch 2 connected to the in-pit safety circuit 602. The cable 302 is connected to the connector 301. The portable switch 304 is connected to the connector 301 via the cable 302. When the portable switch 304 is connected to the in-pit safety circuit 602 via the in-pit safety switch 2, the connector 301, and the cable 302, the portable switch 304 is operated. This switches the state of the in-pit safety circuit 602 between a conductive state and a cut-off state. With this configuration, the worker 10 in the pit 9 can stop the car 1 by operating the portable switch 304 provided on the housing 303 carried by the worker 10. Therefore, when the worker 10 performs maintenance and inspection work in the pit 9 away from the in-pit safety switch 2 and detects an abnormal sound, the car 1 can be stopped by operating the portable switch 304. As a result, car 1 can be stopped more quickly.

[0042] Furthermore, in the in-pit safety portable switch device 3 according to the first embodiment, the portable switch 304 has a make contact. When the portable switch 304 is pressed, the make contact of the portable switch 304 is turned on, and the in-pit safety circuit 602 is brought into a conductive state. When the portable switch 304 is released from being pressed, the make contact of the portable switch 304 is turned off, and the in-pit safety circuit 602 is brought into a cut-off state. With this configuration, the worker 10 in the pit 9 can bring the in-pit safety circuit 602 into a cut-off state simply by releasing the portable switch 304. This allows the car 1 to stop more quickly.

[0043] Furthermore, the in-pit safety portable switch device 3 according to the first embodiment is provided with a winding device 306 that can wind and unwind the cable 302. With this configuration, the length of the cable 302 from the connector 301 to the housing 303 can be adjusted according to the distance between the position of the connector 301 and the position of the worker 10 in the pit 9.

[0044] Furthermore, the in-pit safety portable switch device 3 according to the first embodiment is provided with a warning device 305 that is provided in a housing 303 in which the portable switch 304 is provided, and that issues a warning when the distance between the car 1 and the floor 902 of the pit 9 falls below a preset value L1. According to this configuration, when the distance between the car 1 and the floor 902 of the pit 9 falls below the preset value L1, it is possible to notify the worker 10 in the pit 9 that the distance between the car 1 and the floor 902 of the pit 9 has fallen below the preset value L1.

[0045] In the pit safety portable switch device 3 according to the first embodiment, the warning device 305 is configured to issue a warning when the distance between the car 1 and the floor 902 of the pit 9 becomes equal to or less than the preset value L1. However, the warning device 305 may be configured to issue a warning when the distance between a counterweight (not shown) and the floor 902 of the pit 9 becomes equal to or less than the preset value L1. In this case, the first end point switch 4 detects that the distance between the counterweight and the floor 902 of the pit 9 is equal to or less than the preset value L1.

[0046] Furthermore, in the pit safety portable switch device 3 according to the first embodiment, a configuration has been described in which the car 1 stops when the distance between the car 1 and the floor 902 of the pit 9 becomes equal to or less than the preset value L2. However, the configuration may also be such that the car 1 stops when the distance between the counterweight and the floor 902 of the pit 9 becomes equal to or less than the preset value L2. In this case, the second end point switch 5 detects that the distance between the counterweight and the floor 902 of the pit 9 is equal to or less than the preset value L2. When the car 1 stops, the counterweight stops.

[0047] Furthermore, in the pit safety portable switch device 3 according to the first embodiment, the warning device 305 is a lamp. However, the warning device 305 is not limited to a lamp and may be, for example, a speaker device. In this case, the warning device 305 issues a warning by sound.

[0048] The above describes the in-pit safety portable switch device 3 according to the preferred embodiment 1, but the present invention is not limited to the in-pit safety portable switch device 3 according to the above-described embodiment 1. Various modifications and alterations can be made to the in-pit safety portable switch device 3 according to the above-described embodiment 1 without departing from the scope of the claims.

[0049] (Appendix 1) a connector provided on the pit safety switch connected to the pit safety circuit; a cable connected to the connector; a portable switch connected to the connector via the cable; Equipped with A pit safety portable switch device in which the state of the pit safety circuit is switched between a conductive state in which the pit safety circuit is conductive and a disconnected state in which the pit safety circuit is disconnected by operating the portable switch while the portable switch is connected to the pit safety circuit via the pit safety switch, the connector, and the cable. (Appendix 2) The portable switch has a make contact, A pit safety portable switch device as described in Appendix 1, in which when the portable switch is pressed, the make contact is turned on and the pit safety circuit is turned on, and when the portable switch is released from being pressed, the make contact is turned off and the pit safety circuit is turned off. (Appendix 3) A pit safety portable switch device as described in Appendix 1 or Appendix 2, which is equipped with a winding device capable of winding and unwinding the cable. (Appendix 4) A pit safety portable switch device as described in any one of Appendix 1 to Appendix 3, which is equipped with a warning device that is provided in a housing in which the portable switch is provided and that warns when the distance between the cage or counterweight and the pit floor falls below a predetermined value. [Explanation of symbols]

[0050] 1 car, 2 in-pit safety switch, 3 in-pit safety portable switch device, 4 first end switch, 5 second end switch, 6 elevator control panel, 7 hoistway, 8 worker, 9 pit, 10 worker, 201 housing, 202 lever, 203 connector, 301 connector, 302 cable, 303 housing, 304 portable switch, 305 warning device, 306 winding device, 601 control unit, 602 in-pit safety circuit, 901 side wall, 902 floor.

Claims

1. a connector provided on the pit safety switch connected to the pit safety circuit; a cable connected to the connector; a portable switch connected to the connector via the cable; a warning device provided in the housing in which the portable switch is provided, for warning when the distance between the car or the counterweight and the floor of the pit becomes equal to or less than a preset value; Equipped with A pit safety portable switch device in which the state of the pit safety circuit is switched between a conductive state in which the pit safety circuit is conductive and a disconnected state in which the pit safety circuit is disconnected by operating the portable switch while the portable switch is connected to the pit safety circuit via the pit safety switch, the connector, and the cable.

2. The portable switch has a make contact, A pit safety portable switch device as described in claim 1, wherein when the portable switch is pressed, the make contact is turned on and the pit safety circuit is turned on, and when the portable switch is released from being pressed, the make contact is turned off and the pit safety circuit is turned off.

3. 3. A pit safety portable switch device as claimed in claim 1 or claim 2, which is provided with a winding device capable of winding and unwinding the cable.

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