JP2009040570A - Car locking device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fix and stop a car of an elevator during a checking operation by surely turning a switch off even when a spring in the switch is broken. <P>SOLUTION: This switch mechanism comprises a limit switch, which turns off a power source of a driving device of a car when a lock rod 27 is locked by a fixing mechanism 5 and turning on a power source after the lock of the lock rod 27 of an operation mechanism 3 and the fixing mechanism 5 is canceled and the lock rod 27 is moved backward and recovered. It comprises a condition maintaining means engaged with the lock rod 27 between a first condition when the rock rod 27 moves forward and a second condition when it moves backward, following a condition change accompanied with a forward and backward operation of the lock rod, and maintaining the power source off when the lock rod 27 is in the first condition. The condition maintaining means comprises a roller 35a, and a cam mechanism 41. The cam mechanism 41 is fixed to a rear end of the lock rod 27, and guides the roller 35a to be energized in a backward-moving direction together with the forward-moving direction of the lock rod 27, and turns off a contact point inside a limit switch 35. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator car fixing device, and more particularly, to an elevator car fixing device that reliably fixes and stops an elevator car such as an elevator without a machine room that requires maintenance and inspection work in a hoistway.

  In general, many elevators have an elevator car (hereinafter referred to as a car) on which a user rides, a hoisting rod that raises and lowers the car, a counterweight that balances the car, and a car that is wound around the hoisting cage. This is a rope type elevator composed of a rope that couples a weight and a control device that controls the operation of the entire elevator. As an installation space for the rope type elevator, an elevator car hoistway and a machine room for housing a hoisting machine and a control device (control panel) are required, and the machine room is provided at the uppermost part of the hoistway.

  However, in a housing complex such as an apartment, there may be a case where a sufficient machine room space cannot be secured at the top of the building due to architectural conditions such as the right to sunshine. Therefore, a machine room-less elevator that eliminates the need for a machine room space has been conventionally proposed (see, for example, Patent Document 1).

  FIG. 6 is a perspective view showing an example of a conventional elevator without a machine room. The elevator stop lock device shown in FIG. 6 includes an operation mechanism 3 provided on the upper beam 2 of the ceiling of the car 1 and a fixing mechanism 5 provided on a fixing part for fixing the car-side guide rail 4 to the wall of the hoistway 11. It is applied to elevators without a machine room of a suspended rope type. In addition, the elevator to which the stop lock device shown in FIG. 1 is applied is not provided with a machine room. Is installed in the gap between the wall side reaching the top of the hoistway 11 and the projection surface of the car 1. That is, in FIG. 1, the hoisting machine 10 is supported and fixed at a position near the ceiling of the hoistway 11. The hoisting machine 10 includes a driving device 8 such as an electric motor that drives the car 1 and the counterweight 6 up and down by a rope 7, and a traction sheave 9. A cage 1 and a counterweight 6 are suspended from both ends of the rope 7.

  In this machine room-less elevator, a drive device and a control device for driving the car 1 are installed in the hoistway 11, so that when the maintenance check of the drive device and the control device is performed, the car 1 rides on the ceiling of the car 1. It will be. At this time, if the car 1 suddenly starts to move during the maintenance inspection, there is a possibility that the safety of the worker working on the car 1 may not be secured. A car fixing device is installed.

  7A is a plan view, FIG. 7B is a front view, and FIG. 7C is a perspective view of a conventional car fixing device. FIG. 8 is a (a) front view and a (b) plan view of a fixing mechanism of a conventional car fixing device. 6 and 7, the operation mechanism 3 is installed on the ceiling of the car 1 and is operated by a worker during maintenance inspection. The operation mechanism 3 includes first to third brackets 24 to 26, a lock rod 27, an operation lever 28, an operation lever connecting shaft 29, a fixing nut 30, a fixing bolt 31, a fixing nut 32, and an upper beam fixing bolt. 33, an upper beam fixing nut 34 and a limit switch 35 as a power-off means.

  The fixing mechanism 5 is attached to the rail 4 and has a lock rod insertion hole 36a into which the lock rod 27 of the operation mechanism 3 can be inserted as shown in FIG. An operator can fix the car by operating the operation mechanism 3 and inserting the lock rod 27 into the insertion hole 36a of the fixing mechanism 5 when performing maintenance and inspection on the car. When the lock rod 27 is moved, the operation lever 28 is lifted up and slid in the lateral direction in a state of being disengaged from the groove 25b of the bracket 25, and the lever 28 is fitted into the groove 25a.

  A limit switch 35 having a contact contacting / separating mechanism is attached to the bracket 26 of the operation mechanism 3. The limit switch 35 includes a roller 35 a that is rotatably supported by a lever and is positioned so as to contact the end of the lock rod 27. The lead wire of the limit switch 35 is connected to the power supply circuit 40 a of the control device 40 that controls the hoisting machine 10. When the roller 35a moves with the movement of the end of the lock rod 27, the contact contact / separation mechanism inside the limit switch 35 opens and closes by the force of the spring incorporated therein, thereby turning on and off the power supply circuit 40a. It has become.

Normally, the switch 35 turns on the power supply circuit 40a while the lock rod 27 pushes the roller 35a in the backward direction, and the lock fixing device 27 is operated so that the lock rod 27 advances and is coupled to the lock rod coupling member 36. In this state, since the lock rod 27 moves, the roller 35a moves in the contact release direction by the spring force of the switch 35, and the switch 35 turns off the power supply circuit 40a.
JP 2000-203774 A

  However, in the above-described prior art, when the lock rod 27 is inserted into the fixing mechanism 5, the power supply circuit 40a can be turned off while the contact / separation mechanism of the limit switch 35 is opened by the spring force. When the spring in the inside is broken, there is a possibility that the power supply circuit cannot be turned off, and there is a problem that the driving device may operate.

  The present invention reliably fixes and stops the elevator car during inspection work by reliably turning off the switch even when there is an abnormality in the spring in the limit switch when the car fixing device is operated. An object is to provide a car fixing device.

  In order to solve the above-described problems, an elevator car fixing device according to the present invention includes a lock rod that can be moved back and forth in a longitudinal direction from an elevator car that is guided by a guide rail in a hoistway to move up and down. An operation mechanism that enables fixing and releasing of a car; and a fixing mechanism provided on the stationary part side to lock the tip of the lock bar when the locking bar advances to the stationary part side; A switch mechanism that turns off the power of the elevator car drive device when the fixing mechanism engages the tip of the lock rod, and the switch mechanism is configured such that the lock rod is engaged with the fixing mechanism. When the power of the elevator car drive device is turned off, the lock of the operation mechanism is released from the locking mechanism and the locking mechanism is released, so that the lock bar returns to the elevator car. The lock rod engages with a part of the lock rod between a limit switch that turns on the power of the drive device after the first state and a second state when the lock rod advances and a second state when the lock rod retreats. And a state maintaining means for keeping the power of the drive device off when the lock rod is in the first state. And

  In the elevator car fixing device according to the present invention, the limit switch is disposed on the rear end side of the lock rod, and the state maintaining means is on the lock rod side of the limit switch. A roller rotatably supported at the tip of a rod whose base end side is fixed to the end of the rod so as to be swingable, and fixed to the rear end of the lock rod, and as the lock rod moves in the advancing direction And a cam mechanism for guiding the roller to urge in the backward direction to forcibly turn off the contact of the limit switch and to maintain the off state.

  In the elevator car fixing device according to the present invention, the limit switch is disposed on the front end side of the lock rod so as to extend in a direction orthogonal to the direction in which the lock rod extends. And the state maintaining means includes a roller rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch on the lock rod side so as to be swingable. When the lock rod is retracted, it abuts against the front end of the lock rod, and urges the rod in a direction away from the lock rod by the peripheral surface of the lock rod while rotating as the lock rod advances. Thus, the contact of the limit switch is forcibly turned off and the off state is maintained.

  The elevator car fixing device according to the present invention has the above-described configuration, wherein the operation mechanism is fixed to the elevator car and the lock bar is held so as to be movable forward and backward, and the lock bar is in the first state. And a misalignment prevention pin for positioning in each of the second states.

  In the elevator car fixing device according to the present invention, the limit switch is disposed on the rear end side of the lock rod, and the state maintaining means is on the lock rod side of the limit switch. A roller rotatably supported at the tip of a rod whose base end is fixed to the end of the rod so as to be swingable, and an inclined guide surface formed on a part of the peripheral surface of the rear end of the lock rod. A cam surface for guiding the roller to be urged in the backward direction as the lock rod moves in the advancing direction to forcibly turn off the contact of the limit switch and maintain this off state. It is characterized by that.

  In the elevator car fixing device according to the present invention, the limit switch is disposed on the rear end side of the lock rod, and the state maintaining means is on the lock rod side of the limit switch. One end is fixed to the rear end of the lock rod, and the other end is fixed to the roller. A string member, and as the lock rod moves in the traveling direction, the string member pulls the roller in the traveling direction to forcibly turn off the contact of the limit switch and The state is maintained.

  According to the present invention, the elevator car is securely fixed and stopped during inspection work.

  Hereinafter, embodiments of an elevator car fixing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]
The elevator car fixing device according to the first embodiment includes an operation mechanism 3, a fixing mechanism 5, and a limit switch 35 as a switch mechanism. The operation mechanism 3 enables the car to be fixed and released by a lock rod that can be moved back and forth in the longitudinal direction from an elevator car that is guided by guide rails in the hoistway to move up and down. The fixing mechanism 5 is provided on the stationary part side in order to lock the tip of the locking bar when the locking bar advances to the stationary part side. The switch mechanism turns off the power of the elevator car driving device when the fixing mechanism engages the tip of the lock bar.

  As shown in FIG. 1A, the switch mechanism turns off the power of the elevator car drive device when the lock bar 27 is locked to the fixing mechanism 5, and is fixed to the lock bar 27 of the operation mechanism 3. A limit switch 35 is provided to turn on the power of the driving device after the lock of the mechanism 5 is released and the lock rod 27 retreats back to the elevator car side. Further, the switch mechanism is engaged with a part of the lock rod 27 between the first state when the lock rod 27 is advanced (FIG. 1C) and the second state when the lock rod 27 is retracted (FIG. 1B). And a state maintaining means for following changes in the two states associated with the forward / backward movement of the lock rod and maintaining the power of the drive device off when the lock rod 27 is in the first state. .

  In the first embodiment, the limit switch 35 is disposed on the rear end side of the lock rod 27. The state maintaining unit includes a roller 35 a and a cam mechanism 41. The roller 35a is rotatably supported at the distal end of a rod whose base end is fixed to the end of the limit switch 35 on the lock rod 27 side so as to be swingable. The cam mechanism 41 is fixed to the rear end portion of the lock rod 27 and guides the roller 35a so as to urge the roller 35a in the backward direction as the lock rod 27 moves in the advancing direction. It is forcibly turned off and this off state is maintained.

  A more detailed configuration will be described with reference to FIGS. 1A is a plan view of an elevator car fixing device according to a first embodiment of the present invention, FIG. 1A is a plan view before a car fixing operation, FIG. 1B is a front view before the car fixing operation, and FIG. 1C is a front view after the car fixing operation. Each figure is shown.

  In FIG. 1, a bolt 41, a nut 33, a spring seat 44, and a flat seat 45 are attached to the rear end portion of the lock rod 27 so that a cam 41 as a state maintaining means covers the roller 3 a of the limit switch 35. ing. At this time, appropriate gaps are provided in the bolt 32, the nut 33, the spring seat 44, and the flat seat 45 to which the cam 41 is attached, and the cam 41 is rotatable with respect to the lock rod 27.

  At this time, the roller 35a is not in contact with the cam 41, and the limit switch 35 is turned on. When the car fixing device is operated, when the cam 41 moves as the end of the lock rod 27 moves, the cam 41 contacts the roller 35a and moves the roller 35a. The limit switch 35 is turned off. Here, when the lock rod 27 is moved, the operation lever 28 is lifted up to release the engagement with the groove 25b.

  As a result, the lock rod 27 rotates. However, since the cam 41 is rotatably attached to the lock rod 27 as described above, it can follow the movement of the lock rod. When the lock rod 27 is returned, the roller 35a is moved by the force of the spring incorporated in the limit switch 35 and the switch is turned on. Thus, by using the cam mechanism, the power supply circuit can be reliably turned off even in an abnormal situation such as a spring in the limit switch 35 being broken.

  In addition, when the car fixing device is returned with the spring broken, the limit switch remains off. However, maintaining this state is based on the fail-safe concept, so the system is safe. It becomes the state of the side.

[Second Embodiment]
FIG. 2: is (a) top view and (b) front view which show the state before the fixing operation | movement of the elevator car fixing device of 2nd Embodiment of this invention.

  The basic configuration is the same as that of the first embodiment, but in the second embodiment, the mounting position of the limit switch 35 and the mounting state of the roller 35a are different, and the state maintaining means is not the cam mechanism but the roller 35a. It differs in that it is the circumference of the bar. That is, as shown in FIGS. 2A and 2B, the limit switch 35 is a direction orthogonal to the direction in which the lock rod 27 extends (horizontal direction in the figure) on the front end side in the moving direction of the lock rod 27. It is arranged so as to extend in the same (vertical direction). The state maintaining means is a roller 35 rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch 35 on the lock rod 27 side (upper end in the figure). is there. The roller 35 abuts the front end of the lock rod 27 when the lock rod 27 is retracted, and attaches a rod in a direction away from the lock rod by the peripheral surface of the lock rod while rotating as the lock rod 27 advances. To force. Thereby, the contact inside the limit switch 35 is forcibly turned off, and this off state is maintained when the peripheral surface of the lock rod 27 presses the roller 35a.

  A detailed configuration will be described with reference to FIGS. The limit switch 35 is attached to a bracket 46 attached to the vertical pillar 11 and is installed so as to contact the front end portion of the lock rod 27. In this state, the limit switch 35 is on. Here, when operating the car fixing device, as the front end of the lock rod 27 moves, the roller 35a moves so as to be pressed downward while rotating, and subsequently pressed downward by the peripheral surface of the lock rod 27. By doing so, the limit switch 35 is turned off.

  When the lock rod 27 is returned in the backward direction, the roller 35a is moved by the force of a spring (not shown) incorporated in the limit switch 35 and the switch is turned on. By using such a mechanism, the power supply circuit can be reliably turned off even when the spring in the limit switch 35 is broken.

[Third Embodiment]
In the third embodiment, the basic configuration of the operation mechanism 3 is the same as that of the first embodiment, but the forward / backward movement of the lock rod 27 is different.

  As shown in FIGS. 3A and 3B, the operation mechanism 3 includes a bracket 24 fixed to the upper beam 2 of the elevator car ceiling. The bracket 24 holds the lock rod 27 so as to be movable forward and backward. Further, a position shift prevention pin 49 is provided, and the lock rod 27 is positioned at each of the first state in which the lock rod 27 has advanced toward the fixing mechanism 5 and the second state in which the lock rod 27 has retreated. It has become.

  Specifically, in the first embodiment, when the lock rod 27 is moved, the lock rod 27 is rotated and slid to release the engagement of the operation lever 28 from the groove 25b. Then, the groove 25c of the bracket 25 is one, and the operation of the lock rod 27 is only a sliding motion, and it is not necessary to perform a rotational motion. As a specific positioning method, positioning holes are provided in the bracket 24 and the lock rod 27 at two locations (for normal operation and for operation of the car fixing device), and the misalignment prevention pin 49 is provided on the lock rod 27. By inserting, the lock rod 27 is positioned, and the displacement of the lock rod 27 is prevented.

  A cam 50 is attached to the rear end portion of the lock rod 27 by a bolt 42. In order to prevent the lock rod 27 from rotating, the shape of the cam 50 does not need to be provided with a configuration for preventing the circumferential surface or side portion of the roller 35a from being displaced as in the first embodiment, and the cam 50 is also attached to the bolt. Only a simplified structure can be realized.

[Fourth Embodiment]
In the fourth embodiment, the basic configuration of the operation mechanism 3 is the same as that of the third embodiment, but the shape of the cam that operates the limit switch 35 is different as shown in FIGS.

  As shown in FIGS. 4A and 4B, the limit switch 35 is disposed on the rear end side of the lock rod 27. The state maintaining means includes a roller 35a rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch 35 on the lock rod 27 side, and a peripheral surface of the lock rod 27. And a groove 27a as a cam surface for guiding the formed roller so as to urge it in the backward direction.

  The groove 27a is guided by an inclined guide surface formed on a part of the peripheral surface on the rear end side of the lock rod 27 so as to urge the roller 35a accompanying the movement of the lock rod 27 in the moving direction. is doing. As a result, the cam surface of the groove 27a forcibly turns off a contact (not shown) of the limit switch 35 and maintains this off state.

  A groove 27a cut obliquely is provided in the lower part of the peripheral surface on the rear end side of the lock rod 27, and a roller 35a provided in the limit switch 35 is provided so as to be accommodated in the groove 27a. The groove 27a serves as a cam surface. By incorporating the cam function into the lock rod 27, the number of parts can be reduced and the space can be saved.

[Fifth Embodiment]
The fifth embodiment is characterized in that the basic configuration of the operation mechanism 3 is the same as that of the first or third embodiment, and a string-like member is used instead of a cam to operate the limit switch 35.

  5A and 5B, the limit switch 35 is disposed on the rear end side of the lock rod 27. The state maintaining means includes a roller 35 a and a string-like member 51. The roller 35a is rotatably supported at the distal end of a rod whose base end is fixed to the end of the limit switch 35 on the lock rod 27 side so as to be swingable. The string-like member 51 has one end fixed to the rear end of the lock rod 27 and the other end fixed to the roller 35a. As the lock member 27 moves in the traveling direction, the string-like member 51 forcibly turns off a contact (not shown) of the limit switch 35 by pulling the roller 35a in the traveling direction, and maintains this off state. It has a configuration.

  5 (a) and 5 (b), one end of a nylon string-like member 51 is fixed to the rear end portion of the lock rod 27 by a fixing bolt 52. The other end of 51 is connected to a roller 35 a of a limit switch 35. The roller 35a is connected to one end of the limit switch 35 through a rod, as in the first embodiment.

  The operation in the above configuration will be described. When the operation mechanism 3 of the car fixing device is operated, the roller 35a is pulled by the string-like member 51 with the movement of the end of the lock rod 27, and the limit switch 35 is turned off. Further, when the roller 35a maintains the second state by pulling the string-like member 51, the limit switch 35 is also kept off.

  When the lock rod 27 is returned to the first state, the roller 35a moves the internal contact by the force of the spring incorporated in the limit switch 35, and the switch is turned on. By using such a mechanism, the circuit can be reliably turned off even when the spring provided in the limit switch 35 is broken.

It is the (a) top view before operation | movement of the elevator car fixing apparatus of 1st Embodiment, (b) The front view before operation | movement, (c) The front view after operation | movement. It is the (a) top view before the operation | movement of 2nd Embodiment, (b) It is a front view. It is the (a) top view before operation | movement of 3rd Embodiment, (b) It is a front view. (A) Top view before operation | movement of 4th Embodiment, (b) It is a front view. It is the (a) top view before the operation | movement of 5th Embodiment, (b) It is a front view. It is a perspective view which shows an example of the conventional elevator without a machine room. It is (a) top view, (b) front view, (c) perspective view of a conventional car fixing device. It is (a) front view and (b) top view of the fixing mechanism of the conventional cage fixing device.

Explanation of symbols

3 Operating mechanism 5 Fixing mechanism 27 Locking rod 35 Switch mechanism (limit switch)
35a Roller 41 State maintaining means (cam mechanism)

Claims (6)

An operation mechanism that enables the car to be fixed and released by a lock rod that can be moved back and forth in the longitudinal direction from an elevator car that is guided by a guide rail in the hoistway to ascend and descend to the stationary part side of the hoistway;
A fixing mechanism provided on the stationary part side for locking the tip of the locking bar when the locking bar advances to the stationary part side;
A switch mechanism that turns off the power of the elevator car drive device when the fixing mechanism locks the tip of the lock bar; and
The switch mechanism is
When the lock rod is locked to the fixing mechanism, the power of the elevator car drive device is turned off, and the lock rod of the operation mechanism and the locking mechanism are released, so that the lock rod is A limit switch for turning on the power of the driving device after returning to the elevator car,
While engaging a part of the lock rod between the first state when the lock rod is advanced and the second state when the lock rod is retracted, it follows changes in two states accompanying the forward and backward movement of the lock rod; State maintaining means for maintaining the power of the driving device off when the lock bar is in the first state;
An elevator car fixing device characterized by comprising: The limit switch is disposed on the rear end side of the lock rod,
The state maintaining means includes a roller rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch on the side of the lock rod so as to be swingable, and a rear end of the lock rod. A cam mechanism that is fixed and guides the roller to be urged backward in accordance with the movement of the lock rod in the advancing direction to forcibly turn off the contact of the limit switch and maintain the off state. The elevator car fixing device according to claim 1, further comprising: The limit switch is disposed on the front end side of the lock rod so as to extend in a direction orthogonal to the direction in which the lock rod extends,
The state maintaining means includes a roller rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch on the lock rod side so as to be swingable, and the roller is the lock rod When the lock is retracted, it comes into contact with the front end of the lock rod, and the limit is obtained by urging the rod in a direction away from the lock rod by the peripheral surface of the lock rod while rotating as the lock rod advances. 2. The elevator car fixing device according to claim 1, wherein the contact of the switch is forcibly turned off and the off state is maintained.   The operation mechanism includes a bracket that is fixed to the elevator car and holds the lock rod so as to be movable forward and backward, and a misalignment prevention pin that positions the lock rod in each of the first state and the second state. The elevator car fixing device according to claim 1, wherein the elevator car fixing device is provided. The limit switch is disposed on the rear end side of the lock rod,
The state maintaining means includes a roller rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch on the lock rod side, and a rear end side of the lock rod. The limit switch contact is forcibly turned off by guiding the roller to be urged in the backward direction with the movement of the lock rod in the advancing direction by an inclined guide surface formed on a part of the circumferential surface of the limit switch. An elevator car fixing device according to claim 1, further comprising a cam surface that maintains the off state. The limit switch is disposed on the rear end side of the lock rod,
The state maintaining means includes a roller rotatably supported at the tip of a rod whose base end is fixed to the end of the limit switch on the side of the lock rod so as to be swingable, and a rear end of the lock rod. A string-like member having one end fixed and the other end fixed to the roller;
With the movement of the lock rod in the traveling direction, the string-like member pulls the roller in the traveling direction to forcibly turn off the contact of the limit switch and maintain the off state. The elevator car fixing device according to claim 1.

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