JP2011256001A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a simple construction having high reliability by relating arrangement and attachment of a limit switch and final limit switch for automatic operation control of an elevator with an oil containing shock absorber.SOLUTION: An elevator device includes: a limit switch (LS) 4 operating when a cage 7 overpasses from a regular stopping position of a terminal stair by a prescribed distance; a final limit switch (FLS) 5 operating when the cage further overpasses by a fixed distance from the prescribed distance; and the oil containing shock absorber 20 arranged to come into contact with the cage 7 in a position separated from the regular stopping position of the cage 7 by the prescribed distance and having a plunger 2 and a cylinder 3; wherein the LS4 and the FLS 5 are switches for determining whether control of automatic operation of the elevator device is made possible, and the LS4 and the FLS5 are attached to the oil containing shock absorber 20 and are arranged in an projected surface range of horizontal cross section of the cage 7 at a bottom part of a cage side lifting path.

Description

  The present invention relates to an elevator apparatus provided with an oil-filled shock absorber that operates at the end of a hoistway, and more particularly to a technique for improving the reliability and safety of the elevator apparatus.

  As a conventional technique for ensuring the safety of an elevator apparatus, for example, in Patent Document 1, a detection switch for detecting a buffering operation of this shock absorber is provided in the vicinity of the counterweight shock absorber, and an operation detection signal from the detection switch is provided. In response to this, it has been proposed to operate a rope brake device that prevents the car from moving up and down.

  In addition, in order to check the operation of the oil-filled shock absorber used in the elevator device, the oil-filled shock absorber may be provided with a switch that detects that the plunger of the oil-filled shock absorber has returned to the normal return position. Patent Document 2 discloses this.

International Publication Number WO2004 / 073325 JP-A-5-246647

  As described in Patent Document 1 and Patent Document 2, according to the conventional elevator apparatus, although the installation of the detection switch for detecting the buffering operation of the shock absorber is described, the switch to be installed is a single switch. This switch is not a substitute for the limit switch (LS) and the final limit switch (FLS), which are generally required to be installed in an elevator, and operate when the car passes over the terminal floor.

  An object of the present invention is to provide a highly reliable and simple elevator device by arranging two limit switches of LS and FLS in the projection plane range of a horizontal section of a car or a counterweight and attaching it to an oil-filled shock absorber. Is to provide.

In order to solve the above problems, the present invention mainly adopts the following configuration.
A limit switch that operates when the car has exceeded a predetermined distance from the normal stop position on the final floor, a final limit switch that operates when the predetermined distance has further exceeded a predetermined distance, and a predetermined distance from the normal stop position of the car In an elevator apparatus comprising a plunger and an oil-filled shock absorber having a cylinder arranged so as to come into contact with the car at a different position, the limit switch and final limit switch can control the automatic operation of the elevator apparatus. The limit switch and the final limit switch are attached to the oil-filled shock absorber, and the projection plane range of the horizontal section of the car at the bottom of the car side hoistway It is set as the structure arrange | positioned in.

  In addition, a limit switch that operates when the counterweight exceeds a predetermined distance from the normal stop position on the terminal floor, a final limit switch that operates when the predetermined distance further exceeds a predetermined distance, and the counterweight normal In the rope type elevator apparatus comprising a cage and a counterweight, the limit switch is provided with a plunger disposed so as to come into contact with the counterweight at a predetermined distance from a stop position and an oil-filled shock absorber having a cylinder. And the final limit switch is a switch for determining whether or not the automatic operation of the elevator apparatus can be controlled, and the limit switch and the final limit switch are attached to the oil-filled shock absorber, and The horizontal section of the counterweight at the bottom of the counterweight side hoistway A structure disposed within Kagemen range.

  According to the present invention, it is possible to detect the return of the original position of the oil-filled shock absorber, and to improve the reliability and safety of operation control of the elevator apparatus, and conventionally, the end of the hoistway (the top or the top) Equipment configuration at the end of the elevator hoistway by placing the LS and FLS located at the side of the car at the bottom) within the projection plane range of the horizontal section of the car or counterweight and attaching to the oil-filled shock absorber Simplification, space saving, cost reduction of equipment, improvement of equipment installation and maintenance, and reduction of protection measures for catching long objects during an earthquake.

It is a figure which shows arrangement | positioning with the oil-filled buffer used for the elevator apparatus which concerns on embodiment of this invention, and LS and FLS. FIG. 5 is a layout diagram when an oil-filled shock absorber and LS and FLS used in the elevator apparatus according to the present embodiment are applied to a car-side hoistway pit. It is a figure showing the state which LS act | operated because the oil-filled buffer used for the elevator apparatus which concerns on this embodiment collided with the cage | basket | car. It is a figure showing the state which FLS act | operated because the oil-filled buffer used for the elevator apparatus which concerns on this embodiment collided with the cage | basket | car. It is a figure which shows the other example of a structure of the oil-filled buffer used for the elevator apparatus which concerns on this embodiment, and LS and FLS. It is the schematic which shows arrangement | positioning with the oil-filled buffer used for a general elevator apparatus, LS, and FLS. It is a figure which shows the structural example of attachment of LS and FLS used for a general elevator apparatus. It is a schematic block diagram of the elevator apparatus which concerns on this embodiment.

  First, a schematic configuration of an elevator apparatus according to an embodiment of the present invention will be described with reference to FIG. As shown in FIG. 8, a rope 33 is wound around a sheave 32 of a hoist provided in the machine room 31, and the car 7 and the counterweight 35 are respectively connected to both ends of the rope 33. . The car 7 is guided by the car side guide rail 22 in the hoistway 30, and the counterweight 35 is guided by the counterweight side guide rail 34, and the sheave 32 of the hoisting machine rotates. The car 7 and the counterweight 35 move up and down in the hoistway 30.

  An arrangement configuration of an oil-filled shock absorber and LS and FLS in an elevator apparatus according to an embodiment of the present invention will be described below with reference to the drawings. A device configuration example at the bottom of a hoistway pit in a general elevator apparatus will be described with reference to FIGS. 6 and 7. FIG. 6 is a schematic view showing the arrangement of an oil-filled shock absorber used in a general elevator apparatus, and LS and FLS, and FIG. 7 shows a configuration example of mounting of LS and FLS used in a general elevator apparatus. FIG.

  In the drawings, 4 represents a limit switch (LS), 5 represents a final limit switch (FLS), 20 represents an oil-filled shock absorber, 21 represents a switch operating body installed in a car, 22 represents a guide rail, and 23 represents a bracket. Here, even if the car 7 is abnormally lowered and the switch 4 operates, the limit switch 4 can return to the automatic operation control of the elevator if the elevator operating condition is given. It has a switch function. Further, the final limit switch 5 cannot be returned to the automatic operation control of the elevator if the car 7 further descends abnormally and the switch 5 is operated, and a manual return by maintenance personnel is required. It has a switch function.

  In the arrangement configuration example of the car 7 and the LS4 and FLS5 shown in FIGS. 6 and 7, the operation is performed so that the elevator decelerates and stops with respect to the elevator by the operation of the LS4 so that the car does not go over and lower than a predetermined position on the terminal floor. Be controlled. In addition, even when the deceleration control by LS4 does not operate, FLS5 is installed in order to reliably stop the operation so that the terminal floor does not go too far. The power supply to the drive unit is cut off, and the lowering of the car 7 is stopped by the brake. In addition, when the car 7 further descends for some reason, a shock absorber is installed that stops the car with a small impact so that passengers in the car are safe.

  Further, in the arrangement configuration example of LS4 and FLS5 shown in FIG. 7, the bracket 23 is installed on the existing guide rail 22, and the LS4 and FLS5 are attached to this bracket. In other words, the LS4 and FLS5 It was necessary to install a dedicated bracket 23 for the purpose. Further, a switch operating body 21 for operating the LS4 and FLS5 is attached to the side surface of the car 27.

  Next, the arrangement configuration of the oil-filled shock absorber and the LS and FLS in the elevator apparatus according to the embodiment of the present invention will be described below with reference to FIGS. In the drawing, 1 is a shock absorber cage contact portion, 2 is a plunger, 3 is a cylinder, 4 is a limit switch (LS), 5 is a final limit switch (FLS), 6 is a shock absorber base, 7 is a cage, 8 is A shock absorber abutting portion of the car, 9 represents a hoistway pit.

  FIG. 2 shows a state in which the car 7 stops at the lowest floor during normal operation of a rope type elevator having a car and a counterweight. In FIG. 2, a certain gap is secured between the shock absorber contact portion 8 of the car and the car contact portion 1 of the shock absorber. That is, the oil-filled shock absorber 20 is brought into contact with the car abutting portion 1 at a position further away from the lower end portion of the car 7 by a predetermined position in the descending direction with reference to a state where the car 7 is stopped at the lower end floor. Is provided. FIG. 3 shows a state in which the car 7 has gone over the hoistway terminal floor for some reason, and the car shock absorber contact portion 8 collided with the car contact portion 1 of the shock absorber.

  In FIG. 3, when the car 7 goes too far, the limit switch LS4 functions by compression of the oil-filled shock absorber, that is, relative displacement between the cylinder 3 and the plunger 2. In the illustrated example of FIG. 3, the switch 4 operates when the LS 4 rides on the vertical side surface portion from the lower surface inclined portion of the car contact portion 1 of the shock absorber. The limit switch LS4 in the present embodiment can immediately detect when the car 7 comes into contact with the car contact portion 1 and the car contact portion 1 moves downward. Further, FIG. 4 shows a state in which the car 7 further goes over the terminal floor for some reason and the final limit switch 5 is activated. When the final limit switch 5 is actuated after reaching the state of FIG. 4, there is a need for manual operation by maintenance personnel to return the elevator automatic operation.

  In other words, in the state of FIG. 3 (LS4 is detected as abnormal and FLS5 is detected as non-abnormal), the elevator can be returned to automatic operation (regardless of manual operation), and the state shown in FIG. 4 (LS4 is detected as abnormal and FLS5 is detected). In the (abnormality detection), the return of the elevator to automatic operation depends on manual operation.

  Further, the oil-filled shock absorber 20 has a shock absorbing function by the oil in the cylinder 3 of the shock absorber 20, but when the load applied to the shock absorber 20 is eliminated, the plunger 2 is built in the shock absorber. The spring returns to the original position. The return of the plunger 2 to the original position is normally confirmed by a switch, and after this confirmation, it is guaranteed that the shock absorber is normally operated again. Incidentally, the switch shown in the above cited document 2 is a switch for confirming the return of the original position of the shock absorber plunger 2 described above.

  Thus, in the elevator apparatus of the present invention, the car abutting portion 1 and the car abutting portion 1 are separated from the end of the car 7 stopped at the normal terminal floor stop position of the car 7 by a predetermined position in the direction of the end of the hoistway. An oil-filled shock absorber 20 is provided so as to come into contact with the oil-filled shock absorber 20, a limit switch that operates when the car 7 has passed a predetermined distance from the normal terminal floor stop position of the car 7, and a normal terminal floor A final limit switch is provided that operates when a predetermined distance is exceeded in addition to exceeding a predetermined distance from the stop position. And when seen from the vertical direction of the hoistway 30, such an oil-filled buffer 20 is arrange | positioned in the projection range of the cage | basket | car 7. FIG.

  If the limit switch LS4 is activated but the final limit switch FLS5 is not activated (the state shown in FIG. 3), the limit switch LS4 is released from the contact of the car 7 with the car contact portion 1 and the plunger. 2 can be detected to return to the original height, so that the car 7 rises based on the conditions of operation control (for example, calling from the upper floor landing, ascending operation control after LS4 operation, etc.) A signal that detects that the plunger 2 has returned to its original height can be detected using the limit switch LS4 as a switch that enables automatic operation of the elevator, and the elevator can be automatically returned. As described above, the LS 4 cooperates with the FLS 5 to be a detection element for automatically operating the elevator and also serves as a detection element for confirming the return of the original position of the plunger 2 of the shock absorber 20.

  In addition, by attaching LS4 and FLS5 to the oil-filled shock absorber, the brackets 23 dedicated to LS4 and FLS5 shown in FIG. 7 are not required, and a simple structure can be obtained. By arranging it within the projection plane range of 7 horizontal sections, the equipment configuration at the end of the elevator hoistway pit is simplified, space saving, equipment costs are reduced, equipment installation and maintenance are improved, earthquake It is possible to reduce the measures to prevent long objects from being caught.

  Next, another configuration example of the oil-filled shock absorber and the LS and FLS used in the elevator apparatus according to the present embodiment will be described with reference to FIG. As shown in the figure, the shock absorber 20 is provided with a shock absorber 10 and a support 11 that supports the shock absorber abutting portion 8 (see FIG. 2) of the car 7. A switch actuating body 14 to be connected and a switch actuating body 15 opposed to the support 11 with a gap are provided. The switch actuating bodies 14 and 15 are respectively movable pieces 12 (movable) which come into contact with the contacts 13 of LS4 and FLS5. Contact).

  Each fixed contact 13 of LS4 and FLS5 is a structure which is always in contact with the operating piece 12 during normal operation of the elevator. The plunger 2 of the oil-filled shock absorber 20 is lowered by the abnormal lowering of the car 7, and the fixed contact 13 (for example, a normally closed contact) of the switch is forcibly moved to reliably interrupt the contact at the fixed contact 13. This makes it possible to improve the reliability and safety of the elevator apparatus.

  In the above description, the related configuration between the oil-filled shock absorber and the LS and FLS when the car 7 abnormally descends at the bottom of the hoistway pit 9 is disclosed, but when the car 7 abnormally rises at the top of the hoistway pit 9, Installation of an oil-filled shock absorber and LS and FLS that perform the same operation also constitutes an embodiment of the present invention (because an abnormal rise is assumed in addition to an abnormal fall as an abnormal mode of an elevator) ). In this case, from FIG. 1, the car abutment portion 1 is brought into contact with the car 7 at a position further away from the upper end portion of the car 7 by a predetermined position in the ascending direction with reference to the state where the car 7 is stopped at the ascending end floor. The oil-filled shock absorber 20 having the form described in FIG. 5 is provided upside down, and the oil-filled shock absorber 20 is activated when the car has exceeded a predetermined position. What is necessary is just to provide a final limit switch that is activated when it goes too far. That is, the limit switch described with reference to FIGS. 1 to 5 and the oil-filled shock absorber 20 provided with the final limit switch may be provided upside down. Then, when viewed from the vertical direction of the hoistway 30, such an oil-filled shock absorber 20 is disposed within the projection range of the car 7.

  Further, the related configuration of the oil-filled shock absorber and the LS and FLS can be applied to the counterweight instead of the rope-type elevator car, and in the case of being provided below the counterweight 35 from FIG. 5 is replaced with the counterweight 35, and when the car 7 is provided above the counterweight 35, the car 7 described above is replaced with the counterweight 35, so that the above-described case of the car is the same. It will have a technical meaning. Also in this case, such an oil-filled shock absorber 20 is disposed within the projection range of the counterweight 35 when viewed from the vertical direction of the hoistway 30.

  It should be noted that such an oil-filled shock absorber and the related configuration of LS and FLS are applied to both the lower side of the car 7 and the lower side of the counterweight 35, or both the upper side of the car 7 and the upper side of the counterweight 35. May be. As described above, the present invention can provide the related configurations of the oil-filled shock absorber and the LS and FLS in various combinations in consideration of the shape and conditions of the hoistway and the restrictions of the building where the elevator is provided.

  In addition, the present embodiment has been described by taking an elevator with a machine room as an example, but it can also be applied to a machine room-less elevator without a machine room.

1 Cushion car contact part 2 Plunger 3 Cylinder 4 Limit switch (LS)
5 Final limit switch (FLS)
6 shock absorber stand 7 car 8 car shock absorber contact portion 9 hoistway pit 10 buffer rubber 11 support plate 12 movable piece (movable contact)
DESCRIPTION OF SYMBOLS 13 Fixed contact 14 Switch actuating body 15 Switch actuating body 20 Oil-filled buffer 21 Switch actuating body of car installation 22 Car side guide rail 23 Bracket 30 Hoistway 31 Machine room 32 Sheave 33 Rope 34 Counterweight side guide rail 35 Counterweight

Claims (8)

A limit switch that operates when the car has exceeded a predetermined distance from the normal stop position on the final floor, a final limit switch that operates when the predetermined distance has further exceeded a predetermined distance, and a predetermined distance from the normal stop position of the car In an elevator apparatus comprising a plunger and a oil-filled shock absorber having a cylinder arranged so as to come into contact with the car at a certain position,
The limit switch and the final limit switch are switches for deciding whether to enable control of automatic operation of the elevator apparatus,
The elevator device, wherein the limit switch and the final limit switch are attached to the oil-filled shock absorber and are disposed within a projection plane range of a horizontal section of the car at the bottom of the car hoistway. A limit switch that operates when the car has exceeded a predetermined distance from the normal stop position on the final floor, a final limit switch that operates when the predetermined distance has further exceeded a predetermined distance, and a predetermined distance from the normal stop position of the car In an elevator apparatus comprising a plunger and a oil-filled shock absorber having a cylinder arranged so as to come into contact with the car at a certain position,
The limit switch and the final limit switch are switches for deciding whether to enable control of automatic operation of the elevator apparatus,
The limit switch and the final limit switch are attached to the oil-filled shock absorber, and are arranged in a projection plane range of a horizontal section of the car at the top of the car-side hoistway. A limit switch that operates when the counterweight exceeds a predetermined distance from the normal stop position on the terminal floor, a final limit switch that operates when the predetermined distance exceeds a predetermined distance, and a normal stop position of the counterweight In a rope type elevator apparatus comprising a basket and a counterweight, the plunger and the oil-filled shock absorber having a cylinder arranged so as to come into contact with the counterweight at a predetermined distance from each other,
The limit switch and the final limit switch are switches for deciding whether to enable control of automatic operation of the elevator apparatus,
The limit switch and the final limit switch are attached to the oil-filled shock absorber, and are disposed within a projection plane range of a horizontal section of the counterweight at the bottom of the counterweight-side hoistway. Elevator equipment. A limit switch that operates when the counterweight exceeds a predetermined distance from the normal stop position on the terminal floor, a final limit switch that operates when the predetermined distance exceeds a predetermined distance, and a normal stop position of the counterweight In a rope type elevator apparatus comprising a basket and a counterweight, the plunger and the oil-filled shock absorber having a cylinder arranged so as to come into contact with the counterweight at a predetermined distance from each other,
The limit switch and the final limit switch are switches for deciding whether to enable control of automatic operation of the elevator apparatus,
The limit switch and the final limit switch are attached to the oil-filled shock absorber, and are arranged within a projection plane range of a horizontal section of the counterweight at the top of the counterweight-side hoistway. Elevator equipment. In any one of claims 1 to 4,
The elevator apparatus according to claim 1, wherein the limit switch is operated by displacement of a plunger with respect to a cylinder of the oil-filled shock absorber before the final limit switch is operated by raising or lowering the car or the counterweight. In any one of claims 1 to 4,
After the limit switch is activated, when the load on the oil-filled shock absorber is eliminated by raising or lowering the car or the counterweight, the limit switch indicates that the plunger of the oil-filled shock absorber has returned to the original position. Elevator device characterized by detecting also. In claim 6,
When the limit switch is activated and the final limit switch is deactivated due to the raising or lowering of the car or the counterweight, when the load on the oil-filled shock absorber is removed, the plunger returns to the original position. When this is detected, the control of the automatic operation of the elevator apparatus is automatically returned. In any one of claims 1 to 7,
The limit switch and the final limit switch are switches having a structure in which contact with a fixed contact of each switch is interrupted by moving a movable contact of each switch as the plunger of the oil-filled shock absorber moves. An elevator apparatus characterized by being.

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