JP2015168567A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device capable of safely achieving adjustment of the weight of a counterweight with high reliability at low cost, and surely detecting and coping with abnormal operation of movable parts.SOLUTION: An elevator device comprises an elevator car and a counterweight which are connected with each other by a rope in a hoistway, and which are lifted/lowered mutually by a hoist around which the rope is wound. The elevator device includes a sub weight holding unit which can hold a sub weight for changing the weight of the counterweight, which is installed in a vertically movable manner above the counterweight, and which can supply and recover the sub weight to and from a loading part on the counterweight. The sub weight holding unit is moved in a vertical direction between a predetermined standby position and a transfer position to the loading part by a vertical mechanism. Position detection means is provided between the sub weight holding unit and the side of the hoistway, and detects whether the sub weight holding unit stops at the predetermined standby position and at the transfer position.

Description

  Embodiments described herein relate generally to an elevator apparatus that can change a weight on a counterweight side by changing a subweight.

  In recent years, there has been a growing demand for improved elevator efficiency and energy saving. One method for realizing this highly efficient and energy-saving elevator is to improve the operation efficiency by adjusting the balance of the car and the counterweight in accordance with the pattern of the number of passengers in the elevator and the tendency of usage frequency. In order to realize this elevator, it is conceivable to change the weight of the counterweight.

  In this case, the weight must be changed in the shortest possible time so as not to hinder the operation of the elevator. Moreover, even if an unexpected situation such as an earthquake occurs, a mechanism that operates reliably is required. Furthermore, a space-saving mechanism that can be incorporated into the current elevator hoistway is also required.

  As this type of technology, a mechanism for adjusting the weight of the counterweight by hooking an arbitrary number of subweights on the counterweight side has been proposed (for example, see Patent Document 1).

JP 2009-215049 A

  The thing of patent document 1 was the structure which drives the connection shaft in the counterweight side, and hooks a subweight with this connection shaft. For this reason, an actuator is required on the counterweight side. When there is an actuator on the counterweight side, a long cable for sending electric power and signals must be connected to the counterweight that moves in the hoistway, which causes problems in terms of cost and reliability. Further, since the subweight is suspended under the counterweight that frequently moves in the hoistway, if the connecting portion is broken due to vibration or earthquake, the subweight may fall and be dangerous. Furthermore, the lower part of the hoistway has a buffer, a rope and the like, and there is a problem that there is no space for arranging the subweight.

  The problem to be solved by the present invention is to provide an elevator apparatus that can safely adjust the weight of the counterweight at low cost and with high reliability, and can detect and respond to abnormal operations of moving parts with certainty. There is to do.

  An elevator apparatus according to an embodiment of the present invention is provided so that it can be lifted and lowered along rails erected in a hoistway, and the rope wraps a car and a counterweight connected to each other by a rope. An elevator mechanism that lifts and lowers each other by a hoisting machine that can hold a subweight for changing the weight of the counterweight, and is installed above the counterweight so as to be movable up and down. A subweight holding unit having a function of supplying and collecting the subweight with respect to the mounting portion, and the subweight holding unit in a vertical direction between a predetermined standby position and a transfer position to the mounting portion. An up-and-down mechanism to be moved; provided between the sub-weight holding unit and the hoistway side; Vertical movement of the lifting unit, characterized in that whether to stop in the predetermined standby position and transfer position and a position detecting means for detecting, respectively.

1 is a perspective view showing an overall configuration of an elevator apparatus according to an embodiment of the present invention. It is a perspective view which shows the internal structure of the subweight holding | maintenance unit in the elevator apparatus which concerns on one Embodiment of this invention. It is a figure which shows the principal part structure of the elevator apparatus which concerns on one Embodiment of this invention. It is a figure which shows the principal part structure of the elevator apparatus which concerns on other embodiment of this invention. It is a top view of the to-be-contacted switch shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In the elevator apparatus according to this embodiment, a car 12 and a counterweight 13 are guided in corresponding rails 14 and 15 in a hoistway 11 so as to be capable of ascending and descending. The car 12 and the counterweight 13 are connected to each other by a rope 16 and are driven up and down by a hoisting machine 17 around which the rope 16 is wound.

  In this embodiment, 2: 1 roping is adopted, and one end of the rope 16 is fixed to the upper part of the hoistway 11 by a hitch 19. The other end of the rope 16 descends in the hoistway 11 and is hung from one side of the car 12 to the other side of the car 12 through a suspension car (not shown) provided on the bottom surface. It rises in the hoistway 11 along the side surface. Then, after being wound around the sheave of the hoisting machine 17 provided at the upper part of the hoistway 11, the hoisting space portion of the counterweight 13 in the hoistway 11 is lowered and wound around the suspension wheel 20 of the counterweight 13. Then, the inside of the hoistway 11 is raised again, and is fixed to the upper part of the hoistway 11 by the hitch 21.

  In addition, in FIG. 1, the structural material which supports the hoisting machine 17 and the hitches 19 and 21 in the upper part of the hoistway 11 is abbreviate | omitting illustration.

  This elevator apparatus is characterized in that the weight is changed by safely and securely replacing a subweight described later with respect to the counterweight 13, and at least one subweight is provided above the counterweight 13. A sub-weight mounting portion 23 that can be mounted in a stacked state is provided. The subweight mounting portion 23 has a pair of left and right guide columns 24, and the subweight is mounted between the pair of guide columns 24. As shown in FIG. 1, the pair of left and right guide columns 24 are provided with groove-shaped members having a U-shaped cross section so that the grooves face each other.

  A subweight holding unit 26 having a function of supplying a subweight and a function of collecting the subweight from the subweight mounting part 23 is provided above the subweight mounting part 23 on the counterweight 13.

  That is, the subweight holding unit 26 is installed near the upper end of the hoistway 11, and the counterweight 13 stops at a predetermined transfer position near the upper end of the hoistway 11. Weight is supplied and mounted.

  Here, the subweight holding unit 26 is suspended and supported by a vertical mechanism 27 such as a winch disposed at the upper end of the hoistway 11 so as to be movable up and down via a wire 271, and is provided above and below the left and right side surfaces. The guide member 28 engages with the counterweight rail 15 and is supported by the rail 15 in the vertical direction. That is, the wire 271 is wound and fed out by an up-and-down mechanism (hereinafter, described as a winch) 27. By operating the winch 27, the subweight holding unit 26 is moved from a predetermined standby position in the upper part of the drawing. It can be moved to the transfer position on the subweight mounting portion 23. As shown in the figure, the winch 27 is installed in a frame 29 fixed to the hoistway 11 side.

  One or more subweights 31 are accommodated in the subweight holding unit 26 as shown in FIG. As shown in FIG. 2, these subweights 31 are detachably held by holding portions 32 provided on the left and right in the subweight holding unit 26. The subweight holding unit 26 supplies one or more subweights 31 to the subweight mounting portion 23 on the counterweight 13 and stacks and mounts them in the vertical direction.

  As shown in FIG. 2, the holding unit 32 includes a rotary shaft 33 that is arranged in the vertical direction and that can rotate around the shaft, a drive unit 34 that rotationally drives the rotary shaft 33, and a plurality of stages around the outer periphery of the rotary shaft 33. And a plate-like holding piece 35 attached to the. The holding piece 35 can support and release the subweight 31 by rotating the rotary shaft 33 by 90 ° around the axis.

  In the subweight holding unit 26, guide portions 37 are installed in the vertical direction inside the above-described holding portions 32, respectively. When the subweight holding unit 26 moves up and down, the guide portion 37 is combined with a pair of left and right guide columns 24 erected on the subweight mounting portion 23 and slides in the vertical direction while being joined to each other. Then, the subweight holding unit 26 is guided to a predetermined mounting position on the subweight mounting portion 23.

  Here, as described above, the subweight holding unit 26 is moved up and down by the winch 27 between a predetermined standby position and a transfer position to the subweight mounting portion 23. It is important that the subweight holding unit 26 is correctly stopped at the predetermined standby position and transfer position during the moving operation.

  For example, when the subweight holding unit 26 is lowered, if it does not stop at a predetermined transfer position due to some abnormality, it will collide with the subweight mounting portion 23 of the counterweight 13 rising to the predetermined transfer position. On the other hand, when the subweight holding unit 26 stops above a predetermined transfer position due to some abnormality, when the subsequent subweight 31 is mounted, the subweight 31 that is a heavy object is loaded from above the subweight mounting portion 23. Since it is supplied with a gap on top (it will fall), a large impact occurs.

  Even when the subweight holding unit 26 is raised to the standby position, if it continues to rise without stopping at the predetermined standby position due to some abnormality, the subweight holding unit 26 holding the heavyweight subweight 31 is It will collide with the frame 29, and a big impact will arise.

  As described above, when the subweight holding unit 26 moves in the vertical direction, it is important to correctly stop the subweight holding unit 26 at the predetermined standby position and transfer position, respectively. Therefore, in the embodiment of the present invention, as shown in FIG. 3, the subweight holding unit 26 is disposed between the subweight holding unit 26 and the hoistway 11 side member, for example, the rail 15 for the counterweight 13. Position detecting means 41 for detecting whether the movement in the vertical direction stops at a predetermined standby position and transfer position is provided.

  The position detecting means 41 is composed of an operating body 42 provided on the subweight holding unit 26 side and switches 43 to 48 provided on the rail 15 for the counterweight 13 which is a member on the hoistway 11 side. . Among these, the operating points of the switches 43 and 44 are set corresponding to predetermined standby positions and transfer positions, respectively. The two sets of switches 45, 46 and 47, 48 provided between the switches 43, 44 detect the moving direction of the subweight holding unit 26.

  When the operating body 42 moves to the above-described operating point by the vertical movement of the subweight holding unit 26, the operating body 42 operates corresponding ones of the switches 43 to 48. As the operating body 42, a cam piece having a hypotenuse at the upper and lower ends is used. Further, as the switches 43 to 48, mechanical switches that receive an operating force by contact with the operating body (cam piece) 42 are used.

  In the above configuration, when the subweight 31 is supplied from the subweight holding unit 26 onto the subweight mounting portion 23 on the counterweight 13 and mounted, first, the subweight holding unit 26 is lowered by the winch 27, and a predetermined weight is set. Move from the standby position to the transfer position.

  Here, when the subweight holding unit 26 is in the standby position, the switches 43, 45, 46 are in an ON state by contact with the operating body (cam piece) 42. When the subweight holding unit 26 starts to descend, the switch 43 is first turned off, and then the lower oblique side portion of the operating body (cam piece) 42 comes into contact with the switch 47 to turn it on. When the subweight holding unit 26 continues to be lowered, the switch 45 is turned off and the switch 48 is turned on to detect that the subweight holding unit 26 is lowered. Further, the descending speed of the subweight holding unit 26 is measured from the time when the switches 47 and 48 are turned on. Therefore, it is possible to monitor whether the subweight holding unit 26 is descending at an abnormal speed.

  When the subweight holding unit 26 reaches a predetermined transfer position, the switch 44 is turned on. When the subweight holding unit 26 stops at the predetermined transfer position, the switch 46 is kept on. That is, when both the switches 44 and 46 are on, it means that the subweight holding unit 26 has stopped at the predetermined transfer position.

  Thus, when the subweight holding unit 26 reaches a predetermined transfer position, the guide portion 37 is coupled to the guide column 24 and stops on the subweight mounting portion 23. At this time, the subweight 31 gets on the subweight mounting portion 23 and floats from the holding piece 35.

  Thus, with all the subweights 31 away from the holding portion 32, the drive portion 34 rotates the vertical rotation shaft 33 around the axis, releasing the engaged state with the subweight 31, and removing the subweight 31. It is placed on the subweight mounting part 23. Thereafter, the subweight holding unit 26 is moved upward and moved away from the subweight mounting portion 23, and the transfer of the subweight 31 is completed.

  On the other hand, if the subweight holding unit 26 does not stop at the predetermined transfer position and continues to descend, the switch 44 remains on, but the switch 46 turns off. That is, when the switch 44 is on and the switch 46 is off, it means that the subweight holding unit 26 has not stopped at the predetermined transfer position. In this case, since the subweight holding unit 26 collides with the subweight mounting portion 23 of the counterweight 13 rising to the predetermined transfer position, the winch 27 is urgently stopped by a brake means (not shown).

  In addition, when the subweight holding unit 26 stops above a predetermined transfer position due to some abnormality, when the subsequent subweight 31 is mounted, the subweight 31 that is a heavy object is Since it falls on the mounting part 23, a further lowering command is given to the winch 27 or the transfer operation is stopped.

  In this way, from the ON / OFF state of the switches 43 to 48 constituting the position detecting means 41, the operation beyond the normal position of the subweight holding unit 26 that is a movable part or the abnormal operation that does not reach the normal position is ensured. Can detect and respond.

  The switches 43 to 48 constituting the position detection means 41 may be provided on the subweight holding unit 26 side, and the operating body (cam piece) 42 may be provided on the hoistway 11 side.

  Further, the position detecting means 41 may be configured as shown in FIG. That is, as a switch 51 provided on the rail 15 on the hoistway 11 side, as shown in FIG. 5, the plane is U-shaped, and an optical axis 52 is generated between both legs, and depending on whether or not the optical axis 52 is blocked. A non-contact switch that operates on and off is used. As the non-contact switch 51, a standby position detection switch 51A and a transfer position detection switch 51B of the subweight holding unit 26 are provided at corresponding positions. Further, shielding plates 53A and 53B that shield the optical axis 52 of the switch 51 are provided above and below the subweight holding unit 26 as the operating body 53 of the position detecting means 41.

  In the above configuration, when the subweight holding unit 26 is at the predetermined standby position, the switch 51A is shielded by the shielding plate 53A and the switch 51B is turned off. When the subweight holding unit 26 is at the predetermined transfer position, the switch 51B is shielded by the shielding plate 53B and turned on, and the switch 51A is turned off. When the switches 51A and 51B are both unshielded and turned off, it means that they are located out of a predetermined standby position or transfer position.

  Even with this configuration, the operation beyond the normal position of the subweight holding unit 26 that is a movable part from the ON / OFF state of the switches 51A and 51B constituting the position detecting means 41, or an abnormality that does not reach the normal position It is possible to reliably detect and respond to the operation.

  As the non-contact type switch, not only the above-mentioned optical axis consciousness but also a light reflection type, or other known non-contact type switch that operates when the operating body reaches a predetermined position is used. Can do.

  Also in this case, the switches 51A and 51B constituting the position detecting means 41 may be provided on the subweight holding unit 26 side, and the operating bodies (shielding plates) 53A and 53B may be provided on the hoistway 11 side.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 11 ... Hoistway 12 ... Ride car 13 ... Counterweight 14,15 ... Rail 16 ... Rope 23 ... Subweight mounting part 26 ... Subweight holding unit 27 ... Vertical mechanism (winch)
271 ... Wire 31 ... Subweight 32 ... Holding part 33 ... Rotating shaft 34 ... Drive part 35 ... Holding piece 41 ... Position detecting means 42 ... Operating body 43, 44, 45, 46, 47, 48 ... switches

An elevator apparatus according to an embodiment of the present invention is provided so that it can be lifted and lowered along rails erected in a hoistway, and the rope wraps a car and a counterweight connected to each other by a rope. An eleverter device that is lifted and lowered by a hoisting machine, and a subweight for varying the weight of the counterweight;
A counterweight mounting portion provided at an upper portion of the counterweight, capable of mounting at least one subweight, and capable of holding the subweight and being vertically movable above the counterweight; A subweight holding unit having a function of supplying and collecting the subweight to the mounting portion provided in
And a vertical mechanism for moving the subweight holding unit from a predetermined standby position to a transfer position to the mounting portion. The vertical mechanism is provided near the upper end of the rail for the counterweight, and the counterweight Is located at a preset uppermost floor position, the sub weight supply unit is moved to the transfer position to the mounting unit, and the position detection means provided between the sub weight holding unit and the hoistway side Thus, when the subweight holding unit detects that it does not stop at the predetermined transfer position, the movement is urgently stopped .

Claims (4)

An eleverter device, which is provided so as to be able to move up and down along rails erected in the hoistway, and lifts a car and a counterweight connected to each other by a hoisting machine around which the rope is wound. Because
A function capable of holding a subweight for changing the weight of the counterweight, being installed above the counterweight so as to be movable up and down, and supplying and collecting the subweight with respect to the mounting portion of the counterweight A subweight holding unit having:
An up-and-down mechanism that moves the subweight holding unit in a vertical direction between a predetermined standby position and a transfer position to the mounting unit;
Position detecting means provided between the subweight holding unit and the hoistway side, and detecting whether the vertical movement of the subweight holding unit stops at the predetermined standby position and the transfer position, respectively.
An elevator apparatus comprising: The position detecting means includes
A switch provided on one of the subweight holding unit and the hoistway side, each having an operating point corresponding to the predetermined standby position and transfer position;
An operating body that is provided on the other side of the subweight holding unit and the hoistway side, and operates the switch when the subweight holding unit reaches the operating point by the vertical movement of the subweight holding unit;
The elevator apparatus according to claim 1, comprising:   The elevator apparatus according to claim 2, wherein the switch is a mechanical switch that receives an operating force by contact with an operating body.   The elevator apparatus according to claim 2, wherein the switch is a non-contact switch that operates when the operating body reaches a predetermined position.

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