JPS6038311B2 - Rail derailment detection device for elevator lifts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a run-off detection device for detecting when an elevator lifting body deviates from its guide rail due to an earthquake or the like.

Fig. 1 shows a conventional elevator lift detection system.
This will be explained with reference to FIG.

In these figures, 1 is a counterweight connected to an elevator car (not shown) in a spiral shape by a main element 2, 3
4 is a rail that guides the counterweight in the hoistway (not shown);
5 is a guide provided at each corner of the counterbalance bell 1 and slidably engages with the guide rail 3; 5 is a guide rod extending vertically through the counterbalance bell 1 over the entire height of the shaft. A detection element made of a wire rope, 6 is a shaft connected to the upper end of the detection element 5, 7
is a detection plate fixed to the shaft 6; 8 is a spring that urges the detection cable 5 upward; 9 is in contact with the upper surface of the detection plate 7, and changes the control of the elevator when the counterweight 1 is released and rolled. a detection switch 10 for supporting the spring 8;
14 is the ceiling of the hoistway to which the detection switch 9 and bracket 10 are fixed, and 16 is a fixed odor for fixing the detection element 5 at its lower end to the floor 15 of the hoistway. When the balance weight 1 comes off the guide rail 3 as shown by the broken line in FIG. 2, the falling rail detection device configured as described above bends the detection cable 5 and moves the detection plate 7 downward. This is detected by the detection switch 9.
However, it had the following drawbacks.

That is, when the counterweight 1 comes off and rolls, the guides 4 at the four corners of the counterweight 1 come off the guide rail 3 at the same time, and the counterweight 1 rarely shakes in the hoistway. Generally, only one guide piece 4 comes off.

The amount of horizontal displacement Q of the counterweight 1 at the time of such unrolling is about 1 degree. However, the gap between the car and the balance key 1 is generally only a few inches, and there is a risk that they will collide and cause a serious accident. The vertical displacement amount P exerted on the detection plate 7 at the upper end of the detection element 5 by a displacement of the counterweight 1 of about 10 degrees is calculated geometrically, and is estimated to be about 30 degrees in the case of a general building with a lifting stroke. If so, it is approximately 0.3 skin. Accurately detecting this 0.3 skin vertical displacement amount 8 is extremely difficult due to the accuracy of the detection switch 9, the elongation of the detection element 5, the fatigue of the spring 8, etc. Also,
This configuration has the drawback of being expensive because it requires careful installation work and maintenance and inspection within a short period of time. This invention is intended to eliminate the above-mentioned drawbacks, and is capable of accurately detecting a dislodged rail, can be installed at low cost, and does not require long-term maintenance. This is an attempt to provide a method for detecting counterfeits. Embodiments of the present invention will be described below with reference to the drawings.

Figures 3 to 6 show one embodiment.

In these figures, 1 is a counterweight, 2 is a main element, 3 is a guide rail, 4 is a guide element, and 5 is a detection element stretched parallel to the guide rail 3 in the hoistway. It is similar to that of . Reference numeral 11 denotes a clamp device installed on the counterweight 1 that holds the detection cable 5 and causes it to be displaced upward or downward when the guide element 4 comes off the guide rail 3. Reference numeral 12 denotes a clamp activation device that operates the clamp device 11 during unrolling.

Further, 6 is a shaft connected to the upper end of the detection element 5, 17 is a detection part formed in the center of the shaft 6 and is thicker than both ends thereof, and 8 is a detection element connecting the upper end of the shaft 6 and the ceiling 14 of the hoistway. A detection switch 9 is fixed to the ceiling 14 of the hoistway, and 9 is a detection switch that comes into contact with the detection part 17 of the shaft 6 and responds to a difference in the diameter of the shaft due to vertical displacement of the shaft 6. A mounting box 13 that supports the shaft 6 and fixes the detection switch 9 is a biasing spring that connects the lower end of the detection element 5 to the floor 15 of the hoistway and applies tension to the detection element 5. Next, an explanation will be given of the operation of the wheel slippage detection device configured as described above.

When the guide 4 of the counterweight 1 comes off the guide rail 3 due to an earthquake or the like, the following roller 2a of the clamp starting device 12 fixed to the upper part of the guide 4 or the framework of the counterweight 1 shown in FIG. 6 guides it. The arm 12c is rotated by the action of the spring 12b which comes off the roller 3 and urges the arm 12c of the following roller 12a, and the flexible strip 12d is pulled from a wire rope or the like connected to this arm 12c. It will be done. When the cable 12d is pulled, the pin 11d of the clamping device 11 shown in FIG. 5 is connected to the thread 12d, so that it is pulled out. When the pin 11d is pulled out, a bias 11c is generated within the frame 11a of the clamp device 11.
The shoe lib, which is biased and installed, protrudes and slides between the detection element 5, which is loosely inserted into the frame 11a and passes through it, and at least one of the shoe 11b and the frame 11a. Resistance is generated, causing an upward or downward displacement of the detection cable 5 according to the lifting direction of the counterweight 1, and a displacement of the shaft 6 at the upper end of this element 5. The detection switch 9 is normally in contact with the thick detection part 17 of the time axis 6, but when the detection element 5 is displaced as described above, the detection switch 9 is brought into contact with the thin part of the axis 6.
When the switch 9 comes into contact with the elevator, the switch 9 is activated, changing the operation control of the elevator and stopping it. Due to the above-described operation, when the guide element 4 of the counterweight 1 comes off the guide rail 3, the detection element 5 is clamped by the clamping mechanism having the shoe 11b of the clamping device 11, and the detection element 5 is This displacement causes a change in control, such as actuating the detection switch 9 and stopping the operation of the elevator.

Therefore, a large amount of displacement can be applied to the detection element 5 when the wheel is dislodged, and the derailment can be detected much more accurately than in the conventional example described above. can be avoided. Furthermore, since the length of the shaft 6 in the ball direction that contacts the detection switch 9 can be increased,
Effects such as elongation of the detection element 5 and fatigue of the spring 8 that biases the detection element 5 can be avoided, making hemming work easier and lengthening the time until maintenance is required. In the above embodiment, the case where there are two detection elements 5 is shown, but it is also possible to use only one detection element and operate the clamp device with trigger devices provided at the four corners of the counterweight. good. Furthermore, due to the planar space of the hoistway, the detection element may be inserted loosely through the interior of the balance weight. Furthermore, the trigger device that operates the clamp device does not have to have the structure described above, but has a structure in which a portion of the shoe that engages with the guide rail is displaced when the rail is released, and this displacement is used to operate the clamp device. If available, one with an appropriate structure can be used. FIG. 7 shows another embodiment of the invention.

In this embodiment, a loop-shaped detection element 5 is attached to an upper detection sheave 19 rotatably supported on the ceiling 14 of the hoistway, and a lower tension sheave 20 supported on the floor 15 of the hoistway via a spring 13. The detection sheave 19 is provided with a detection protrusion 21 protruding from an appropriate position on its outer circumferential surface, and the detection switch 9 is fixed to the ceiling 14 via the mounting part 22 on the rotation locus of the detection protrusion 21. This differs from the previously described embodiments shown in FIGS. 3 to 6. Then, when the counterweight 1 is released, the trigger device 12 and the clamp device 11
operates in the same manner as the embodiments shown in FIGS. 3 to 6, and by causing vertical displacement in the detection element 5,
The detecting sheave 19 is rotated and the detecting switch 9 is actuated by the detecting protrusion 21 to detect the release of the wheel. FIG. 8 shows still another embodiment in which the upper sheave portion of FIG. 7 is changed.

The one in FIG. 8 includes a detection member 23 that includes a main body 23a made of iron to the detection element 5, a pressing piece 23b made of a leaf spring fixed to the main body 23a, and a pressing force adjustment screw 23c of the pressing piece 23b. The detecting member 23 is connected to the ceiling 14 of the hoistway.
The main body 23a of the detection member 23 is supported by the mounting member 22 fixed thereto, and is supported from above and below by lower springs 24a and 24b. This differs from the one shown in FIG. 7 in that it does not have a detection protrusion.

When the wheel is removed, the detection member 23 is displaced upward or downward by the frictional force, and is disengaged from the detection switch 9 and activated, thereby detecting the removal of the wheel. In addition, in this invention, a bare basket may be used as an elevating body in place of the counterweight, and a clamp device or the like may be provided on this.

As explained above, according to the present invention, when the elevating body is unrolled, the detection element is caused to be vertically displaced to activate the detection switch, so that the unrolled rail can be detected accurately and at low cost. The present invention has the effect of providing a system for detecting roll-off of an elevator lifting body that can be installed in any location and does not require long-term maintenance.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional rail removal detection device, FIG. 2 is a side view of the same, FIG. 3 is a front view of a removal rail detection device according to an embodiment of the present invention, and FIG. 4 is the same side view. 5 is a side view of the clamp device, FIG. 6 is a side view of the clamp starting device, FIG. 7 is a front view showing another embodiment of the present invention, and FIG. 8 is a side view of the clamp device. It is a front view of the upper part which shows still another Example of this invention. 1...Balance weight (elevating body), 2...Main element, 3...Guide rail, 4...Guide, 5...
・Detection element, 9...Detection switch, 11...
Clamp device, 12...Clamp starting device, 1
7...Detection section, 21...Detection protrusion, 23.
...Detection member. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 4 Figure 5 Figure 6 Figure 2 Figure 3 Figure 8 Figure 7

Claims (1)

[Claims] 1. A rail derailment detection device for an elevator lifting body, which has a detection cable stretched in the vertical direction of the hoistway and an elevator control detection switch activated by displacement of the detection cable, which is equipped with a locking member and A clamp device that operates to clamp the detection line when it is on the rail, and a clamp starting device that connects the locking member to a following member that comes off the rail together with the elevating body supported on the guide rail of the elevating body so as to release the lock when the elevating body comes off the rail. A device for detecting off-rails for an elevator lifting body, comprising: a switch operating member disposed near the switch, the switch operation member being interlocked with the vertical displacement of the detection cable caused by the clamping of the detection cable by a clamp device.