JP2014009048A - Safety securing device for work in hoistway of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety securing device for work in a hoistway of an elevator, capable of securing and maintaining the operation stop state of an elevator in any case where a safety belt is not connected and there is doubt whether the safety belt catches on something.SOLUTION: A safety securing device 1 for work in a hoistway of an elevator includes: a latch 3 provided to be integral with a car; a rope 5; a hook provided on the rope and removably locked on the latch; a position holding part; a detecting part; and a stop processing part. The position holding part holds the hook in an object position as a detection target of the detecting part in the position where the hook is locked on the latch, the detecting part detects whether or not the hook is put in the object position, and the stop processing part puts the elevator in the operation stop state when it is not detected that the hook is put in the object position.

Description

  The present invention relates to a work safety ensuring device in an elevator hoistway.

  In the inspection work of the elevator, an operator may get on the elevator car and perform a work. At this time, a safety belt such as a rope is used. The safety belt is connected to an operator, and the end thereof is connected to a predetermined position such as a latch on the elevator car.

  However, even if the operator intends to properly connect the end portions of the safety belt as described above, there may be a situation where the worker is not correctly connected. In addition, even if such a situation occurs, there is a problem that the fact cannot be detected on the control function side of the elevator.

  In relation to the above-described problem, Patent Document 1 discloses a safety belt hook device. In this device, there is provided means for detecting that the latch that latches the safety belt is stored in the three-way frame, and when the stored state is not detected, the elevator car is not run, thereby It is intended to ensure the safety of inspection work.

JP 2011-190076 A

  However, in the apparatus disclosed in Patent Document 1 described above, although the state of the latch that secures the safety belt can be detected, there is a problem that it cannot be detected until the safety belt is applied to the latch. . Furthermore, apart from this problem, even if the safety belt is properly connected, if the safety belt gets caught in equipment in the hoistway, it is necessary to immediately secure and maintain the elevator stop state. There is.

  The present invention has been made in view of the above, and can ensure and maintain the operation stop state of an elevator in any case where a safety belt is not connected and when a safety belt is suspected to be caught. An object of the present invention is to provide a work safety ensuring device in an elevator hoistway.

  In order to achieve the above-described object, an elevator safety working safety device for an elevator according to the present invention includes a hooked portion integrally provided with a car, a safety belt, and the safety belt. And a position holding unit, a detection unit, and a stop processing unit. The position holding unit is configured such that the hooking unit is hooked on the hooked unit. The latching portion is held at a target position that is a detection target of the detection unit, and the detection unit detects whether the latching portion is at the target position and stops the stop. When the detection unit does not detect that the hooking portion is at the target position, the processing unit causes the elevator to stop operating.

  According to the present invention, it is possible to secure and maintain the operation stop state of the elevator in both cases where the safety belt is not connected and when the safety belt is caught.

It is a figure which shows the structure of the work safety ensuring apparatus in the hoistway of the elevator which concerns on Embodiment 1 of this invention. It is a figure which shows the detail of the hook in the working safety ensuring apparatus in the hoistway of the elevator of FIG. It is a figure which shows a state when an excessive tensile force acts on a hook via a rope in the state of FIG. It is a figure of the same aspect as FIG. 1 regarding this Embodiment 2. FIG. It is a figure of the same aspect regarding FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an elevator hoistway work safety ensuring device according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of an elevator work safety ensuring device for elevators according to the first embodiment, and FIG. 2 shows details of hooks in the elevator work safety ensuring device for elevators of FIG. FIG.

  A work safety ensuring device 1 in an elevator hoistway includes a latch 3 that is a hooked portion, a rope 5 that is a safety belt, a hook 7 that is a hooking portion, and a magnet 9a that constitutes a position holding portion and a detection portion. And a support metal body 9b constituting the position holding part, a magnetic sensor 9c constituting the detection part, and a normally open contact 11 constituting the stop processing part.

  The latch 3 is provided at an appropriate position above the elevator car 13, but the specific installation location is not particularly limited as long as it is provided integrally with the car 13. Further, in the illustrated example, the latch 3 has a C-shape in a side view, and both ends of the C-shape are connected to the installation portion 13 a on the upper portion of the car 13. And the closed penetration space 3a is demarcated between the installation part 13a of the upper part of the cage | basket | car 13, and the inside of the latch 3, and the hook 7 is hung by the penetration space 3a so that it may mention later.

  The hook 7 has a hook portion 17 having an entrance 15 on one end side, and a connection portion 19 to which the end portion of the rope 5 is connected on the other end side. The hook 7 has an opening / closing piece 21 that rotates in an arc. The opening / closing piece 21 is provided so as to close the doorway 15 in a natural state by an elastic force such as a spring.

  A through space 7 a is secured inside the hook portion 17. When the hook 7 is hooked on the latch 3, the hook 3 is received in the through space 7 a and at the same time the hook portion 17 penetrates the latch 3. It will be in the state accommodated in the space 3a.

  When the hook 7 is hooked on the latch 3 as described above, the opening / closing piece 21 opens the entrance 15 so that the latch 3 can pass through the entrance 15 as viewed relatively. In addition, the opening / closing piece 21 relatively closes the doorway 15 by an elastic force such as a spring after the latch 3 is accommodated in the through space 7 a, and prevents the hook 7 from being accidentally detached from the latch 3. In this way, the hook 7 is detachably latched to the latch 3.

  The hook 7 is provided with a magnet 9a. The magnet 9 a is disposed between the hook portion 17 and the connection portion 19. The hook 7 is supported by the installation portion 13a by the magnetic force of the magnet 9a. Therefore, the support portion 13a is provided with a supporting metal body 9b at a position facing the magnet 9a. More specifically, the support metal body 9b is provided at least at a portion facing the magnet 9a in a state where the hook 7 is hung on the latch 3.

  Further, the magnetic sensor 9c described above is provided in a portion of the installed portion 13a of the car 13 that faces the magnet 9a in a state where the hook 7 is hooked on the latch 3. The magnetic sensor 9 c is provided in the installation portion 13 a of the car 13, that is, provided in an integral relationship with the latch 3. The integral relationship is a relationship in which the magnetic sensor 9c is also lifted / lowered as part of the car 13 when the latch 3 is lifted / lowered as a part of the car 13, and is fixed to the latch 3 I do not mean. Furthermore, the installation mode of the magnetic sensor 9c may be any mode that can detect whether or not the magnet 9a is attracted to the supporting metal body 9b as will be described later, and is particularly limited to the mode of FIG. is not.

  As can be seen from the above configuration, the position holding unit includes the magnet 9a and the supporting metal body 9b as components, and the detection unit includes the magnet 9a and the magnetic sensor 9c as components. Therefore, the position holding unit holds the hook 7 at a target position that is a detection target of the detection unit among the positions where the hook 7 is hooked on the latch 3, and the detection unit includes a magnet 9 a that is a supporting metal body. It is detected whether or not it is sucked and supported by 9b, that is, whether or not the hook 7 is at the target position.

  The stop processing unit is configured to stop the elevator when the detection unit does not detect that the hook 7 is at the target position. In the present embodiment, the stop processing unit includes the normally open contact 11 as described above. It is out. The normally open contact 11 is provided in a signal transmission path between the portable controller 23 and the control panel 25 for the operator to control the operation of the elevator on the car 13.

  The normally open contact 11 is closed when the magnetic sensor 9c detects that the magnet 9a is attracted and supported by the supporting metal body 9b (the hook 7 is at the target position). Only when the normally open contact 11 is closed, the operator on the car 13 can control the operation of the elevator via the portable controller 23. When the normally open contact 11 is opened, the car 13 is immediately stopped if the car 13 has been moved up and down until then. If the car 13 has been stopped until then, the car 13 continues to be stopped. The stop state is maintained so as not to move up and down.

  Next, the operation of the elevator hoistway work safety ensuring device according to the first embodiment configured as described above will be described with reference to FIGS. 1 and 3. FIG. 3 is a diagram showing a state when an excessive tensile force is applied to the hook through the rope in the state of FIG.

  First, the operator hooks the hook 7 of the rope 5 attached to the hook 5 in the through space 3a inside the latch 3 and causes the magnet 9a of the hook 7 to be attracted to the support metal body 9b of the installation portion 13a. Thereby, the magnetic sensor 9c detects that the hook 7 is hooked on the latch 3 and the magnet 9a is attracted to the supporting metal body 9b, and the normally open contact 11 is thereby closed. . As a result, the operator can control the maintenance operation of the car 13 via the portable controller 23. In other words, even if the operator hooks the hook 7 in the penetrating space 3a of the latch 3, the magnet 9a is not attracted to the supporting metal body 9b, and the hook 7 is left under the weight of the latch 3 and hung downward. In the only state (virtually indicated by a dotted line X in FIG. 1), the normally open contact 11 remains open, and the operator cannot operate the portable controller 23 and cannot perform a maintenance operation. . Therefore, when an operator tries to perform a maintenance operation, the worker must always hook the hook 7 on the latch 3 and attract the magnet 9a of the hook 7 to the supporting metal body 9b. Therefore, if the operator inadvertently forgets to hook the hook 7 or forgets to set the hook 7 at an appropriate target position even when hooked, the maintenance operation itself does not start.

  In addition, after the hook 7 is properly hooked on the latch 3 and the maintenance operation is started, if the rope 5 is caught by a device in the hoistway, a large tension is generated on the rope 5. At this time, since the hook 7 is simply adsorbed to the supporting metal body 9b by a magnetic force, if a large tension acts on the rope 5 as described above, the hook 7 cannot resist the tension and is shown in FIG. Thus, the hook 7 is separated from the supporting metal body 9b (although it is hung on the latch 3). Then, the magnetic sensor 9c does not detect that the hook 7 is at the predetermined target position, and the normally open contact 11 is opened accordingly, so that the elevator is quickly stopped or stopped.

  As explained above, according to the elevator safety working safety ensuring device according to the first embodiment, in any case where the safety belt is not connected or the safety belt is suspected to be caught, It is possible to ensure and maintain the elevator shutdown state. That is, the stop processing unit places the elevator in the operation stop state when the detection unit does not detect that the latching unit is at the target position, so that at least the latching unit is hooked on the latched unit. If there is not, the operation stop state of the elevator is ensured and maintained, and even if the latching portion is hooked on the latched portion, the same applies if the latching portion moves from the target position. In addition, since the operation stop state of the elevator is ensured and maintained, the operation stop state of the elevator must be ensured and maintained both when the safety belt is not connected and when the safety belt is caught. Thus, the safety of the worker can be ensured more reliably.

  In addition, since the magnet constitutes both the position holding unit and the detection unit, the magnetic force can be used for both the maintenance force for position holding and the detection medium for position movement. The structure of the position holding unit and the detection unit can be simplified, and the operation accuracy for ensuring safety can be improved and the cost can be reduced.

  Furthermore, since the stop processing unit is a normally open contact point provided between the portable controller and the control panel, the worker must be able to lock the latching unit when performing maintenance operation on the car. If the safety belt must be attracted to the support metal body and the safety belt is not connected, or if the safety belt is suspected to be caught, the operation on the car should be prohibited. Thus, the safety of the worker can be ensured more reliably.

Embodiment 2. FIG.
Next, based on FIGS. 4 and 5, a description will be given of an elevator work safety ensuring device for elevators according to Embodiment 2 of the present invention. 4 and FIG. 5 are diagrams of the same mode as FIG. 1 and FIG.

  The elevator work safety ensuring apparatus 101 according to the second embodiment includes a hook 107 having two magnets 9a and 109a. The first magnet 9 a is disposed between the hook portion 17 and the connection portion 19 as in the case of the first embodiment. The second magnet 109 a is disposed at the distal end portion of the hook portion 17. In other words, the first magnet 9a and the second magnet 109a are separately arranged on the opposite side across the through space 7a. In other words, the through space 7a is formed between the first magnet 9a and the second magnet 109a. Is located between.

  Further, in response to the presence of the second magnet 109a, a portion of the mounted portion 13a of the car 13 that faces the second magnet 109a in a state where the hook 7 is hooked on the latch 3 is provided with the second magnet. A sensor 109c is provided. It is to be noted that the first magnetic sensor 9c is provided at a portion facing the first magnet 9a as in the case of the first embodiment. As a result, the base portion of the latch 3 (the base portion of the upper leg portion in the illustrated example) is positioned between the first magnetic sensor 9c and the second magnetic sensor 109c.

  Further, although not shown in the drawings, the elevator safety working apparatus 101 in the elevator hoistway according to the second embodiment is also provided with a normally open contact 11 similar to that of the first embodiment. The two magnetic sensors 9c and 109c are both configured to close only when they detect the attracted state of the corresponding magnets 9a and 109a to the supporting metal body 9b.

  By the arrangement of the first magnet 9a and the second magnet 109a described above and the installation of the first magnetic sensor 9c and the second magnetic sensor 109c, the hook 107 is attracted to the supporting metal body 9b of the installation portion 13a. When the two magnets 9a and 109a are to face the corresponding magnetic sensors 9c and 109c, the upper leg portion of the latch 3 must be accommodated in the through space 7a of the hook 7. I do not get.

  Even in the second embodiment configured as described above, as in the first embodiment, the elevator is stopped in both cases where the safety belt is not connected and when the safety belt is suspected to be caught. Can be secured and maintained. In particular, in the second embodiment, when the hook is hooked on the latch, by limiting the position of the hook portion to the penetrating space of the latch by limiting the position of the hook to the penetrating space of the hook by limiting the position of the hook to the support metal body. Further, safety and effectiveness can be further improved by requiring a strict hook state from the above-described Embodiment 1 or more in a position where it cannot be obtained unless it is hooked.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

  For example, safety belts include ropes, wires, tapes, cords, cords, ropes, belts, as well as outer shapes, cross-sectional shapes, materials, hardness, names, etc. Anything that is long can be included.

  Moreover, the form of a latch and a hook is not limited to the shape shown in the description and drawing mentioned above. In other words, the form of the latch and the hook can be appropriately modified as long as the hook can be caught to some extent when the hook is moved in the direction to be separated from the installation portion.

  The stop processing unit is not limited to acting on the route between the portable controller and the control panel, but instead or in addition, acting on another route to stop / maintain the movement of the car. It may be. In short, the stop processing unit is not limited to a specific mode as long as the movement of the car can be stopped and maintained in response to the detection result of the detection unit, and of course, the control process is mechanical (structural) or It includes a wide range of modes that can ensure and maintain the stop of the car by electrical action.

  In the above embodiment, the magnet constitutes both the position holding unit and the detection unit. However, the present invention is not limited to this, and the position holding unit and the detection unit are completely prepared. May be. For example, the position holding portion may be a resin latch fitting means provided between the hook and the latch installation portion and separated by a certain amount of force, and the detection portion may be a hook by the position holding portion. Push button switch means that is pushed in by contact with the hook while the position is held on the latched portion may be used.

  1,101 Elevator hoistway work safety ensuring device, 3 latch (latched part), 5 rope (safety belt), 7, 107 hook (latching part), 7a through space, 9a, 109a magnet (position retention) Part, detection part), 9b support metal body (position holding part), 9c magnetic sensor (detection part), 11 normally open contact, 13 basket.

Claims (4)

A hooking portion provided integrally with the car;
Safety belts,
A hooking portion provided on the safety belt and detachably hooked on the hooked portion,
A position holding unit, a detection unit and a stop processing unit,
The position holding unit holds the latching portion at a target position to be detected by the detection unit among the positions where the latching portion is latched to the latched portion;
The detection unit detects whether the latching portion is at the target position,
When the stop processing unit is not detected by the detection unit that the hooking portion is at the target position, the stop processing unit is put into an operation stop state.
Work safety ensuring device in elevator hoistway. The hook is provided with a magnet,
In a state where the latching portion is at the target position, a supporting metal body is provided at a position facing the magnet,
A magnetic sensor is provided integrally with the hooked portion,
The magnetic sensor detects whether the magnet is supported by the support metal body;
The position holding unit includes the support metal body,
The detection unit includes the magnetic sensor,
The magnet constitutes both the position holding unit and the detection unit.
The apparatus for ensuring work safety in an elevator hoistway according to claim 1. The stop processing unit includes a normally open contact provided in a signal transmission path of a portable controller for an operator to control the operation of an elevator on the car,
The normally open contact is closed when it is detected by the magnetic sensor that the magnet is adsorbed and supported by the support metal body,
The apparatus for ensuring work safety in an elevator hoistway according to claim 2. The hooked portion is a latch,
The hook is a hook having a through space in which the latch is accommodated,
The hook is provided with first and second magnets,
The penetrating space of the hook is located between the first and second magnets;
In a state where the latching portion is at the target position, a supporting metal body is provided at a position facing the first and second magnets,
First and second magnetic sensors are provided integrally with the hooked portion,
The first and second magnetic sensors detect whether the first and second magnets are adsorbed and supported by the supporting metal body, respectively.
The stop processing unit includes a normally open contact provided in a signal transmission path of a portable controller for an operator to control the operation of an elevator on the car,
The normally open contact is closed when it is detected in both the first and second magnetic sensors that the first and second magnets are adsorbed and supported by the support metal body,
The apparatus for ensuring work safety in an elevator hoistway according to claim 1.

Images