JPS6253431B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a derailing detection device for an elevator, and in particular to a mechanism for detecting derailing in which a wire rope for detecting derailing is stretched vertically in an elevator hoistway and the wire rope is grasped when the rail derails. The present invention relates to an elevator derailment detection device that detects derailment by grasping and displacing the elevator.

The applicant has already filed an application for this type of rail-off detection device, but in this application, the gripping mechanism of the rail-off detection device has been further improved to enable more reliable operation. The purpose is to provide something.

In other words, with the rail derailment detection device proposed earlier,
Detection rollers arranged on the left and right sides of the counterweight or the car are always pressed and engaged with the guide rail by roller pressure springs, and when the rail comes off, the detection rollers come off the guide rail. The spring force that presses the roller against the guide rail presses the gripping shoe of the gripping mechanism to grip the wire rope for detecting rail departure. That is, the rail release response mechanism using the detection roller and the gripping mechanism were completely linked to operate by a common spring. For this reason, when the detection roller detaches from the guide rail and rides on something when it comes off the rail, the spring force does not act on the gripping shoe of the gripping mechanism, and as a result, even though it has come off the rail, the detection roller is not able to detect it. Since the wire rope could not be grasped, there was a risk that the rail-off detection could not be performed.

Therefore, in this invention, the gripping mechanism has its own rope gripping spring which is regulated by a latch during normal times, and when the rope is off the rail, the latch of the gripping mechanism is released in conjunction with the off-rail movement of the detection roller, and the The object of the present invention is to provide a mechanism in which the mechanism obtains a rope gripping force using a unique rope gripping spring, thereby making the configuration relatively simple and capable of reliably performing a rail-off detection operation.

In other words, the configuration of the present invention is such that a wire rope for detecting rail derailment is stretched vertically in an elevator hoistway via a support spring, and a roller for detecting derailing is attached to a counterweight or a car, and this roller is attached to a guide rail. A rail derailing response mechanism is provided which has a roller pressure contact spring that is constantly pressed into engagement with the rail, and when the counterweight or the car comes off the rail, the rail derailing detection roller comes off from the guide rail. A gripping mechanism is provided for grasping the wire rope for detecting rail derailment, and when the wire rope for derailing detection is grabbed by the gripping mechanism and displaced up and down with the movement of the counterweight or car, the detector is activated to detect derailment. In the elevator derailment detection device, the above-mentioned gripping mechanism is provided on a support base fixed to a counterweight or a car, and attached to the support base and disposed at a position in front of the rail derailment detection wire rope. The fixed side grabs and shows,
Opposite to the fixed side grip shoe, there is a movable side grip shoe disposed on the rear side of the wire rope for detecting rail derailment, and with the movable side grip shoe attached and supported on the front part, the proximal end is pivoted to the support base. There is a movable lever that can be rotated in the front and rear directions when worn, and this movable lever is constantly pressed and rotated forward to remove the rail between the movable side gripping shoe and the fixed side gripping shoe on the front side. A rope gripping spring for gripping the wire rope for detection; and a rope gripping spring attached to the support base and movable during normal times to a state where the movable side gripper is locked to the tip of the movable lever so that the movable side gripping shoe does not come into contact with the wire rope for detecting rail departure. and a latch that holds the lever in a rearward rotational position against a rope gripping spring, and the latch of the gripping mechanism is released from the movable lever in conjunction with the rail release action of the rail release response mechanism. It is characterized by the provision of an interlocking member for releasing the latch.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Here, as shown in FIG. 1, an example is shown in which the detection device of the present invention is installed to detect when the elevator counterweight 1 comes off the rails, but it is also possible to detect when the car (not shown) side comes off the rails. The same applies.

The counterweight 1 is guided in a vertically movable manner via vertical and horizontal guide shoes 3, 3 (lower end side not shown) relative to left and right guide rails 2, 2 fixed in an elevator hoistway in a building, The upper frame 1a is connected to the main wire rope 4 through the buffer spring 5 and the spring receiver 6, and is connected to the other end via the wire rope 4 by the drive of a hoist (not shown) in the machine room at the end of the hoisting road. It is designed to be able to move up and down relative to the connected car.

Here, as a rail-off detection device for the counterweight 1, first, a single rail-off detection wire rope 7 is stretched over the entire length of the upper and lower sides of the hoistway. The wire rope 7 for detecting rail deviation is passed through a support frame 8 horizontally extending over the upper and lower ends of the left and right guide rails 2, 2 at its upper and lower ends (lower end side not shown), and is connected via a support spring 9 and a spring receiver 10. It is stretched so that it can be moved up and down by supporting it. The upper end spring receiver 10 of the wire rope 7 for detecting rail deviation is integrated with a detection cam 11, and a detector 12 such as a micro switch that operates in response to the vertical movement of the detection cam 11 is connected via a support 13. It is fixed on the support frame 8.

On the other hand, the upper frame 1a of the counterweight 1 is provided with a gripping mechanism 14 and left and right rail release response mechanisms 15, 15.

The rail release response mechanisms 15, 15 each include an L-shaped bracket 16 fixed on the upper frame 1a of the counterweight 1, and a roller whose lower end is rotatably pivoted to the bracket 16 by a hinge 17. a roller lever 18, a rail-off detection roller 19 attached to the upper end of the lever 18, and a roller pressure spring 20 that presses the roller lever 18 so that the roller 19 is constantly pressed into engagement with the guide rail 2. The mechanism is provided with an interlocking link 21, which is a latch release interlocking member whose one end is pivotally connected to the roller lever 18 and is used to release a latch, which will be described later, of the gripping mechanism 14 when the rail is released.

Here, as shown in FIGS. 2 and 3, the gripping mechanism 14 is fixedly installed on the upper frame 1a of the counterweight 1, and is attached to the wire rope 7 for detecting rail deviation.
a substantially box-shaped support base 22 through which the
A pair of upper and lower fixed-side grip shoes 23 and 24 are attached to the front side of the support stand 22 with a space between each other so as to be disposed at the front side of the wire rope 7 for detecting rail derailment, and A movable lever 26 is attached to the lower part with its lower end pivoted by a hinge 25 so as to be rotatable in the front and back direction, and the movable lever 26 is attached and supported near the upper end of the front surface of the movable lever 26. The above-mentioned upper and lower fixed side grip shoes 23, 24 located on the side
The movable side grip shoes 27 are disposed oppositely in a staggered manner approximately in the middle of
a rope gripping spring 28 that pivots forward the movable side gripping shoe 27, that is, presses the movable side gripping shoe 27 forward;
A normal pressure spring 29 is interposed in the upper part of the support base 22 so as to be rotatable about a pivot 30, and during normal times it is latched onto the upper end of the movable lever 26.
A latch 31 restricts the rope to a retracted position against the rope gripping spring 28, and a support base 22 is used as an interlocking member for releasing the latch 31.
L-shaped symmetrical latch release levers 33, 33 are rotatably mounted on both sides of the upper end by pivot shafts 32, 32, respectively, and the upper ends of the left and right latch release levers 33, 33 are It is pivotally connected to the other ends of interlocking links 21, 21 connected to the upper, lower, left and right rail release response mechanisms 15, 15.

To describe the operation of the rail derailment detection device configured as described above, first, the left and right rail derailment response mechanisms 1
5 and 15, the detection roller 19 is maintained in a rolling state by being pressed into contact with the guide rail 2 by the roller pressure spring 20, and does not operate the gripping mechanism 14 at all. . However, if balance weight 1 should come off the rail,
The detection roller 19 of the rail-off response mechanism 15 on the side where the rail has come off comes off the guide rail 2, and performs a rail-off operation in which it rotates outward together with the roller lever 18 under the elastic pressure of the roller pressure contact spring 20. In accordance with this, the interlocking link 21 of the latch release interlocking member is pulled, and the latch release lever 33 is pulled. Now either one or both of the left and right latch release levers 33, 33 are in the second position.
By being rotated as shown in the imaginary line in the figure, the latch 31 of the gripping mechanism 14 is rotated against the normal pressure spring 29 and is removed from the upper end of the movable lever 26. With this, the movable lever 26 rotates forward due to the elastic pressure of its own rope gripping spring 28 and strongly presses the movable side gripping shoe 27 forward, and this movable side gripping shoe 27 causes the fixed side gripping shoe 23, 24 to move forward. The wire rope 7 for detecting rail derailment is securely gripped from the front and back in a staggered manner between the rails. As a result, the wire rope 7 for detecting rail deviation is displaced in the same direction as the movement direction of the counterweight 1, that is, upward or downward, and the detector 12 is activated in response to the detection cam 11 moving accordingly. It will now detect when the rails are off the rails.

In other words, when the rail is released, either the left or right rail removal response mechanism 15, 15 causes a pulling action, even temporarily, and the latch 31 of the gripping mechanism 14 is activated by the interlocking link 21, which is the interlocking member for releasing the latch, and the lever 33 for releasing the latch. Once it is pulled off, the grasping mechanism 14 securely grips the wire rope 7 for detecting rail derailment by the elastic pressure of the rope gripping spring 28 independently provided by the gripping mechanism 14 regardless of the derailing response mechanisms 15, 15, and maintains that state. This prevents the rope gripping function of the gripping mechanism 14 from being lost even if the detection roller 19 climbs onto something after being separated from the guide rail 2. Furthermore, the structures of the rail release response mechanism 15 and the gripping mechanism 14 can be relatively simplified, and most parts can be easily constructed from inexpensive iron plates or the like.

Next, other embodiments of the present invention will be shown with reference to FIGS. 4 to 6. Here, the latch 35 of the gripping mechanism 34
The support stand 36 is attached to the upper part of the frame 37 and the pivot 38 is attached to the lower side of the frame 37.
is rotatably provided via the normal pressure spring 39.
is interposed on the distal end side of the latch 35, and a roller 40 is provided at the rear end of the latch 5, while latch release rotary cams 41 and 42, which are engaged with the roller 40 as interlocking members for latch release, are mounted on the frame 37. axis 4
This rotating cam 41,
42 is pivotally connected to the interlocking links 21, 21 connected to the same rail-off response mechanism as described above, and is moved from the state of FIG. 4 and FIG.
The rotating cams 41, 4 are in the state shown in Fig. 6b or c.
2 rotates, and accordingly, the latch 35 is pulled off from the upper end of the movable lever 43 via the roller 40 against the normal pressure spring 39. When the rail comes off, the gripping mechanism 34 uses the pressing force of the unique rope gripping spring 44 to ensure that the movable side gripping shoe 45, together with the fixed side gripping shoes 46 and 47, secures the wire rope 48 for detecting the rail coming off. This makes it possible to accurately detect rail deviations.

Since this invention is made as described in detail above, when the rail comes off, the gripping mechanism is unlatched by the operation of the rail-off response mechanism, and the gripping mechanism uses the elastic force of the unique rope gripping spring to release the rail-off detection wire. The rope can now be gripped reliably, and rail deviation detection can be performed accurately. In addition, the configuration of the rail release response mechanism and gripping mechanism can be relatively simplified,
It is easy to manufacture and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted schematic front view showing an embodiment of the present invention, FIG. 2 is an enlarged front view of the gripping mechanism in FIG. 1, and FIG. 3 is a partially sectional side view of the same.
FIG. 4 is a side view of a gripping mechanism showing another embodiment of the present invention, FIG. 5 is a side view showing the gripping mechanism in an unlatched state, and FIGS. FIG. 6 is a front view showing each operating state of the latch release rotary cam of FIG. 5; 1...Balance weight, 2...Guide rail, 7,
48...Wire rope for detecting rail derailment, 14,3
4...Gripping mechanism, 15...Rail release response mechanism, 19...
Roller for detecting rail dislodgement, 20...Roller pressure contact spring,
23, 24, 46, 47... Fixed side grip shoe, 2
6,43...Movable lever, 27,45...Movable side gripping shoe, 28,44...Rope gripping spring, 31,
35... Latch, 21, 33, 41, 42... Interlocking member for releasing the latch (21... Interlocking link, 33... Lever for releasing the latch, 41, 42... Rotating cam for releasing the latch).

Claims (1)

[Claims] 1. A wire rope for detecting rail derailment is stretched vertically in the elevator hoistway via a support spring,
The counterweight or the car is provided with a rail-off response mechanism having a rail-off detection roller and a roller pressure contact spring that constantly presses and engages this roller with the guide rail, and when the counterweight or the car comes off the rail, the rail-off response mechanism is provided. A gripping mechanism is provided that grips the wire rope for detecting rail derailment in conjunction with the derailing operation in which the roller for derailing detection comes off the guide rail, and the grasping mechanism grips the wire rope for detecting rail derailment and removes the counterweight or the ride. In an elevator derailing detection device configured to detect derailing by activating a detector when the car is vertically displaced as the car moves, the gripping mechanism is comprised of a counterweight or a support fixed to the car; A fixed side gripping shoe attached to a support stand and arranged at the front side of the wire rope for detecting rail departure, and a movable side gripping shoe arranged at the rear side of the wire rope for detecting rail departure opposite to the fixed side gripping shoe. With this movable grip shoe mounted and supported on the front part, a movable lever is provided that can be rotated in the front and back direction by pivoting the base end to the support base, and this movable lever is constantly pressed. a rope gripping spring that is rotated forward to grip the wire rope for rail derailment detection between the movable side gripping shoe and the fixed side gripping shoe on the front side; and a latch that locks onto the tip of the movable lever and holds the movable lever in a rearward rotating position against a rope gripping spring in a state where the movable side gripping shoe does not contact the rail detachment detection wire rope, A rail-off detection device for an elevator, further comprising a latch release interlocking member for causing the latch of the gripping mechanism to disengage from the movable lever in conjunction with the rail-off operation of the rail-off response mechanism.