JP5421232B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus, and more particularly, to an elevator apparatus including a maintenance fixing device that fixes a counterweight during maintenance of equipment disposed below a hoistway.

  When maintaining equipment such as hoisting machines located below the hoistway, the counterweight guide rails support the counterweight so that it does not hinder the lifting of the counterweight. When fixing the members and maintaining the equipment arranged under the hoistway, the control device is controlled to drive the hoisting machine, and the car and the counterweight are raised and lowered via the main measures, and the car On the top floor, the counterweight is installed near the bottom floor, and then the operator enters the pit and inserts and fixes the fixing rod-shaped member from the support member described above to the counterweight frame. An elevator apparatus provided with a maintenance fixing device that fixes a weight to a counterweight guide rail is known (for example, see Patent Document 1).

JP 2004-161432 A

  However, according to the conventional elevator device, the counterweight is fixed to the hoistway, so even if the hoisting machine etc. is driven, it can work safely without moving the counterweight as well as the car However, there is a possibility that the driving device of the hoisting machine operates even when the counterweight is fixed during the pit work. On the other hand, from the viewpoint of ensuring safety during maintenance and inspection, it is desirable to reliably shut off the power supply to the hoisting machine in conjunction with the fixing operation of the counterweight.

  An object of the present invention is to reliably prevent the operation of a hoisting machine drive device that is often located in the vicinity of performing maintenance work when the car is prevented from moving during maintenance inspection. The object is to provide an elevator apparatus.

In order to achieve the above object, the present invention provides a car guide rail for raising and lowering a car and a counterweight that can be moved up and down in the hoistway via a main rope, and the car and the counterweight. And a counterweight guide rail, a maintenance fixing device having a connecting member for fixing the counterweight to the counterweight guide rail during maintenance, the car and the balance via the main rope. In an elevator apparatus including a hoisting machine that lifts and lowers a weight, the maintenance fixing device detects a storage unit that stores the connection member in a steady state, and detects that the connection member is removed from the storage unit. and a detection unit for the power of the hoisting machine to the OFF state Te, using the fixing rod-like member of the plurality of the above-mentioned connecting member, the above-mentioned storage unit, from the insertion hole of the fixing rod-like member An insertion holding member to be inserted and stored, and the detection portion when the insertion side of the insertion hole in the insertion holding member is releasably closed and the fixing rod-shaped member is moved from the insertion hole to a position where the fixing rod-like member can be inserted. And a stopper that restricts the cam to a position that closes the insertion side of the insertion hole, and the cam is inserted into the insertion hole and stored in the storage unit. Is held at the position to reset the detection unit, and when the fixing rod-shaped member is pulled out from the storage unit, it is placed at a restriction position by the stopper by an elastic biasing force to close the insertion side of the insertion hole, The detection unit detects that at least one of the fixing rod-shaped members has been taken out from the storage unit .

According to such an elevator apparatus, the power of the hoisting machine is not turned off when the connecting member is stored, but the fixing bar-like member is taken out for maintenance of the component equipment such as the hoisting machine. In this state, the hoisting machine can be electrically locked so that the power is turned off. During assembly work of the maintenance fixing device, the counterweight does not move up and down accidentally, and maintenance work is performed. Occasionally the hoisting machine drive is reliably prevented from operating, thus ensuring the safety of the operator. Also, when the fixing rod-like member is stored in the storage unit, if the cam that is in the state of being inserted is rotated, the detection unit is reset, so that the electric power of the hoisting machine is turned off. Forgetting to reset the detection unit that is automatically locked can be reliably prevented. In addition, when the fixing rod-shaped member is inserted, the detection portion can be reliably reset via the cam, and when the fixing rod-shaped member is completely inserted, the same state of the detecting portion can be maintained, while the fixing rod-shaped member is pulled out. And the holding | maintenance of the same state of a detection part is cancelled | released, and it can electrically lock so that the power supply of a winding machine may be in an OFF state easily.

  According to the elevator apparatus of the present invention, the power of the hoisting machine is not turned off when the connecting member is stored, but the connecting member is taken out for maintenance of components such as the hoisting machine. Then, the power of the hoisting machine is electrically locked so that the power is turned off. During the maintenance work, it is possible to prevent the counterweight from moving up and down accidentally. It is possible to ensure the safety of workers by reliably preventing the operation.

It is a front view which shows the principal part of the elevator apparatus by one embodiment of this invention. It is sectional drawing which shows the whole elevator apparatus to which this invention is applied. It is a top view of the elevator apparatus shown in FIG. It is a principal part expansion perspective view of the elevator apparatus shown in FIG.

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

  FIG. 2 is a side view showing a schematic configuration of an elevator apparatus to which the present invention is applied. One end of the main rope 2 is fixed to the upper portion in the hoistway 1 by the end support portion 3, and the intermediate portion of the main rope 2 is After being hung on a pulley 7 fixed in position through a pair of lower car pulleys 5 and 6 arranged at the lower part of the car 4, it is hung on a drive sheave 9 of a hoisting machine 8 fixed in the lower pit of the hoistway 1. The other end is fixed by the other end support portion 13 provided in the upper part in the hoistway 1 through the pulley 10 of the counterweight 10 and the pulley 11 of the counterweight 12. A control device 14 is attached to the wall in the hoistway 1, and the hoisting machine 8 is driven by the control device 14 to guide the car 4 along the guide rail 15 for the car, and the counterweight 12. Is configured to be guided up and down along the counterweight guide rail 16 engaged by the guide portion 29 shown in FIG.

  In such an elevator apparatus, when the components such as the hoisting machine 8 and the control apparatus 14 are maintained, the counterweight frame 18 of the counterweight 12 is mechanically temporarily fixed to the counterweight guide rail 16. Thus, a maintenance fixing device 17 is provided to prevent the car 4 and the counterweight 12 from moving up and down.

  FIG. 1 is an enlarged view showing the vicinity of the maintenance fixing device 17 which is the main part of FIG. 2, and the counterweight 12 can be moved along the counterweight guide rail 16 by a plurality of guide portions 29. A counterweight frame 18, a plurality of weights 19 detachably loaded in the counterweight frame 18, and a pulley 11 rotatably attached to the upper portion of the counterweight frame 18 are provided. The counterweight guide rail 16 in the vicinity of the counterweight 12 is provided with a maintenance fixing device 17 that prevents the counterweight 12 from moving up and down. The maintenance fixing device 17 includes a fixing bolt, a fixing pin, and the like. The fixing rod-shaped members 20 and 21, the storage portion 22 for storing the fixing rod-shaped members 20 and 21, and the counterweight guide rail 16 at a position where the vertical movement of the counterweight 12 is not hindered. A pair of support members that hold the counterweight frame 18 when stopped at a predetermined position and mechanically connect the counterweight frame 18 and the counterweight guide rail 16 by inserting the fixing rod-shaped members 20 and 21. 23, 24 and a limit switch that detects that the fixing rod-like members 20, 21 have been removed from the storage unit 22, and electrically locks the elevator car 4 and the like when the elevator 4 is turned off by turning off the power of the hoisting machine 8. And a which detector 25.

  As shown in FIG. 3, which is a plan view, the storage unit 22 of the maintenance fixing device 17 includes a substantially U-shaped holding bracket 26 disposed on the backside of the counterweight guide rail 16, and the holding bracket 26. Are fixed to the counterweight guide rail 16, nut-shaped holding screw alloy tools 37 and 38 fixed to the inside of the facing portion 28 a of the holding bracket 26, and the outside of the facing portion 28 b of the holding bracket 26. The first cam 30 that is provided and elastically urged to rotate clockwise by an urging spring or the like, and similarly provided on the outer side of the opposed portion 28b and elastically so as to rotate clockwise. When the biased second cam 31 and the fixing rod-like members 20 and 21 that prevent the rotation of both the cams 30 and 31 are removed, it is detected that both have rotated clockwise by a certain angle. limit And a detection unit 25. such as switches.

  The detection unit 25 detects that the fixing bar members 20 and 21 are stored from the rotational positions of the cams 30 and 31 when the fixing bar members 20 and 21 are stored in the storage unit 22. When this is detected, a power supply circuit for the hoisting machine 8 is formed by the control device 14 so that the driving device for the hoisting machine 8 can be operated. However, when the fixing rod-like members 20 and 21 are extracted from the storage unit 22 as will be described later, both the cams 30 and 31 are rotated in the clockwise direction by the elastic biasing force, and the detection unit 25 that has detected this is The power supply circuit of the machine 8 is electrically locked so as to be disconnected.

  A more detailed configuration of the maintenance fixing device 17 will be described with reference to FIG. 4 which is a perspective view. As shown in the figure, on the outside of the opposing portion 28b of the holding bracket 26, there are insertion holes 32a and 32b for guiding and inserting the fixing rod-like members 20 and 21 into the holding screw alloy tools 37 and 38. An insertion holding member 32 is fixed. After the first cam 30 and the second cam 31 are rotated by a predetermined angle in the clockwise direction around the central axis 34 by an elastic biasing force, the insertion holding member 32 is further stopped. A stopper 33 that prevents rotation in the same direction is fixed. On the free end side of the first cam 30 and the second cam 31 disposed between the insertion holding member 32 and the stopper 33, insertion holes 30a and 31a that can be fitted to the insertion holes 32a and 32b of the insertion holding member 32 are provided. Each is formed. Further, on the other end side of the first cam 30 and the second cam 31, an operation detection unit 35 of the detection unit 25 for detecting the clockwise rotation thereof is disposed.

  The holding screw alloy tool 37 and the insertion hole 32a of the insertion holding member 32 are in a straight line, and the insertion hole of the first cam 30 when rotated to the counterclockwise storage position against the elastic biasing force. 30a is also located on this straight line, and the fixing rod-like member 20 is arranged on this straight line. The holding screw alloy tool 38 and the insertion hole 32b of the insertion holding member 32 are on another straight line, and the second cam 31 is rotated to the counterclockwise storage position against the elastic biasing force. The insertion hole 31a is also located on this other straight line, and the fixing rod member 20 is arranged on this straight line.

  Here, an interlock mechanism is constituted by the first cam 30 and the second cam 31, and the first cam 30 and the second cam 31 are rotated counterclockwise by a biasing spring around the central shaft 34, respectively. If the insertion hole 30a of the one cam 30 and the insertion hole 31a of the second cam 31 do not match the insertion holes 32a and 32b of the insertion holding member 32, the fixing rod-like members 20 and 21 cannot be inserted. That is, at the position where the first cam 30 and the second cam 31 are in contact with the stopper 33, the fixing rod-like members 20 and 21 are inserted into the storage unit 22 so that they cannot be stored. With this interlock mechanism, when the fixing rod-like members 20 and 21 are inserted and stored in the storage unit 22, the detection unit 25 can be reliably reset by the first cam 30 and the second cam 31.

  Thus, the power supply of the hoisting machine 8 can be prevented from being driven at the time of maintenance. However, if the newly provided detection unit 25 is not reset at an appropriate time, the hoisting machine 8 is subsequently controlled by the control device 14. Cannot be controlled. However, this interlock mechanism can reliably prevent the detection unit 25 from being forgotten by using the timing while taking advantage of the feature of storing the fixing rod-like members 20 and 21 in the storage unit 22.

  The interlock mechanism is not limited to the illustrated configuration, and various configurations can be used. For example, a cutout may be used instead of the insertion holes 30a and 31a, or a shape that satisfies the above-described insertion conditions of the fixing rod-like members 20 and 21 without using the insertion holes 30a and 31a may be used. . In addition, the first cam 30 and the second cam 31 are held at positions where they abut against the stopper 33 by an elastic biasing force in a steady state, but are not positioned at the same position by other means such as mechanical engagement instead of the elastic biasing force. You may make it hold | maintain.

  When the fixing rod-like members 20 and 21 are stored in the storage unit 22 in a steady state, first, the first cam 30 and the second cam 31 are elastically biased from the state of FIG. It rotates counterclockwise, so that the insertion holes 30a and 31a and the insertion holes 32a and 32b of the insertion holding member 32 are positioned on the same straight line. In this state, the fixing rod members 20 and 21 are inserted into the insertion holes 30a and 31a, and then into the insertion holes 32a and 32b of the insertion holding member 32, and the insertion-side tip portions of the fixing rod members 20 and 21 are used for holding. Screwed onto the screw alloy tools 37 and 38. The cams 30 and 31 are rotated counterclockwise against the elastic bias while the fixing rod-like members 20 and 21 are held, and thereafter the fixing rod-like members 20 and 21 in the storage state. Is prevented from rotating clockwise by the elastic biasing force.

  When the fixing rod-like members 20 and 21 are stored in the storage unit 22 by the interlock mechanism described above, the first cam 30 and the second cam 31 that are hindering insertion must be rotated. The detection unit 25 can be reset using the rotation of the first cam 30 and the second cam 31. Therefore, the detection unit 25 is always reset at the time of storage, and the power supply of the hoisting machine 8 can be controlled as usual by the control device 14, and forgetting to reset the detection unit 25 is reliably prevented.

  Next, the maintenance fixing device 17 for performing maintenance of components such as the hoisting machine 8 and the control device 13 will be described. First, the hoisting machine 8 is driven by the control device 14, and the car 4 is guided to the vicinity of the uppermost floor of the hoistway 1 along the car guide rail 15 via the main rope 2, and the counterweight 12 is A state shown in FIG. 1 is set in the vicinity of the lowermost portion of the hoistway 1 along the counterweight guide rail 16. At this time, the support members 23 and 24 hold the predetermined position of the counterweight frame 18 as shown in FIG. In this state, as described above, the fixing rod-like members 20 and 21 are stored in the storage unit 22, and the detection unit 25 is reset by the positions of the first cam 30 and the second cam 31.

  Thereafter, the worker entering the pit uses the maintenance fixing device 17 to fix the counterweight 12 to the counterweight guide rail 16. This operation is performed after first removing the fixing rod-like members 20 and 21 stored in the storage unit 22. When the fixing rod member 20 is pulled out while rotating as shown in FIG. 4, the distal end portion on the insertion side of the fixing rod member 20 is unscrewed from the holding screw alloy tool 37, and the insertion holding member 32. After passing through the insertion hole 32 a, the first cam 30 is removed from the insertion hole 30 a and removed from the storage unit 22.

  The removed fixing rod-like member 20 is inserted between the support member 23 and the counterweight frame 18 shown in FIGS. 1 and 3 to mechanically fix them. If the support member 23 is a fixing pin, it is prevented from coming off, and if the support member 23 is a bolt, at least a part is screwed to keep it from coming off.

  Next, when the fixing rod-shaped member 21 shown in FIG. 4 is pulled out while rotating in the same manner, the distal end portion on the insertion side of the fixing rod-shaped member 21 is unscrewed from the holding screw alloy tool 38 and inserted. After passing through the insertion hole 32 b of the holding member 32, it is removed from the insertion hole 31 a of the second cam 31 and removed from the storage unit 22. The second fixing rod-like member 21 is inserted between the other support member 24 and the counterweight frame 18 shown in FIGS. 1 and 3 and mechanically fixed to both.

  At this time, the first cam 30 rotates clockwise around the central shaft 34 by an elastic biasing force (not shown), and the second cam 31 also rotates clockwise around the central shaft 34 by an elastic biasing force (not shown). Since the other end portion drives the motion detection unit 35 of the detection unit 25, the detection unit 25 detects that the two fixing rod-like members 20, 21 are removed from the storage unit 22, and the hoisting machine Since the power supply circuit 8 is disconnected and electrically locked, the hoisting machine 8 that is often arranged in the vicinity of maintenance work is not erroneously operated.

  Here, when the first cam 30 and the second cam 31 are independently rotated about the central shaft 34, the first cam 30 and the second cam 31 are rotated by the fixing rod-shaped member first removed from the storage unit 22 and wound by the detection unit 25. The power supply circuit of the upper unit 8 can be disconnected and electrically locked. If it is such a form, it can be set as a safer elevator apparatus. In such a configuration, when the fixing rod-like members 20 and 21 are returned, for example, the first cam 30 is rotated counterclockwise to return the fixing rod-like member 20. 25 is returned to the reset position, but the second cam 31 continues to be electrically locked by cutting off the power circuit of the hoisting machine 8 by the detection unit 25, and the second cam 31 is rotated counterclockwise and fixed. Since the detection part 25 is reset by returning the bar-shaped member 21, the safety at the time of returning can also be made high. However, when the first cam 30 and the second cam 31 are mechanically coupled and rotate integrally around the central axis 34, the first cam 30 and the second cam 31 are rotated by the fixing rod-like member that is finally removed from the storage unit 22. Then, the power supply circuit of the hoisting machine 8 is cut by the detection unit 25 and is electrically locked. Even in such a case, the interlock mechanism described above works effectively.

  In this way, maintenance of components such as the hoisting machine 8 and the control device 13 can be performed safely, and the number of workers arranged for ensuring safety can be reduced. After the operation is completed, the procedure is reversed and the fixing rod-like members 20 and 21 used in the support members 23 and 24 are extracted and stored in the storage unit 22 again. The detection unit 25 is reset depending on the position.

  When a limit switch is used as the detection unit 25, if the electric circuit of the hoisting machine 8 is turned off when the spring in the limit switch is broken, the power circuit is reliably turned off based on the fail-safe concept. The system can be operated safely.

  In this embodiment, in order to fix the counterweight frame 16 to the counterweight guide rail 15 and prevent the counterweight 12 from moving up and down, the pair of counterweight guide rails 16 are respectively provided with support members 23. , 24 are attached, and the counterweight frame 18 and the counterweight guide rail 16 are mechanically connected using the two fixing rod-shaped members 20, 21, but the supporting members 23, 24 and the fixing rod-shaped members are connected. The number of the members 20 and 21 and the attachment positions of the support members 23 and 24 can be arbitrarily selected according to the support strength and the like.

  Further, in this embodiment, the fixing rod-like members 20 and 21 such as fixing bolts are used. However, the present invention is not limited to this, and connection members of other shapes can be used, and two fixing members are used. Attachment / detachment of the connecting members such as the rod-shaped members 20 and 21 is detected by the detection unit 25 via the cams 30 and 31, respectively, but the attachment / detachment of at least one connecting member such as the fixing rod-shaped member 20 is detected via the cam 30 Even if it is detected by the unit 25, substantially the same effect can be expected.

  In another embodiment, when the components such as the hoisting machine 8 and the control device 14 are maintained, the stop position of the counterweight 12 is located below the counterweight 12 as shown in FIG. It is good also as the state mounted on the buffer 36 arrange | positioned.

  According to such an elevator apparatus, the storage unit 22 for storing the connecting members such as the fixing rod-like members 20 and 21 in a steady state is provided, and it is detected that the connecting member has been taken out from the storage unit 22 and the hoisting machine Since the detecting unit 25 that electrically locks the power supply circuit 8 in the OFF state is provided, the power supply of the hoisting machine 8 is not turned off in a state where the connecting member is stored. When the connecting member is taken out for maintenance of the components such as the machine 8 and the control device 13, the hoisting machine 8 is electrically locked so that the power supply is turned off. In addition to mechanically preventing the weight 12 and the like from being lifted and lowered, it is necessary to ensure the safety of workers to electrically prevent the drive device of the hoisting machine 8 from operating during maintenance work. Can do.

  Further, the fixing rod-like members 20 and 21 are used as connecting members, and the rotation is prevented by the fixing rod-like members 20 and 21 stored in the storage unit 22 of the maintenance fixing device 17, and the fixing rod-like member 20 from the storage unit 22 is prevented. , 21 are provided, and cams 30 and 31 that rotate when the cams 30 and 31 are taken out are used as the detection unit 25 that detects that the fixing bar members 20 and 21 are taken out by the rotation of the cams 30 and 31. Can be detected more easily, and even if the number of the fixing rod-like members 20 and 21 is increased as necessary, the common detection unit 25 can be easily controlled by the cam. In addition, when the detection unit 25 is reset by the cams 30 and 31, the fixing bar members 20 and 21 can be inserted from the insertion holes 32 a and 32 b of the insertion holding member 32. When storing 21 in the storage unit 22, it is possible to prevent the detection unit 25 newly provided from forgetting to return to the steady state.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Main rope 3 End support part 4 Car 5 Lower pulley 6 Lower pulley 7 Pulley 8 Hoisting machine 9 Drive sheave 10 Pulley 11 Pulley 12 Counterweight 13 End support 14 Control device 15 Guide rail 16 for car Balance weight guide rail 17 Maintenance fixing device 18 Balance weight frame 19 Weight 20 Fixing rod member 21 Fixing rod member 22 Storage portion 23, 24 Support member 25 Detection portion 26 Holding bracket 27 Bolt 28a Opposing portion 28b Opposing portion DESCRIPTION OF SYMBOLS 29 Guide part 30 1st cam 30a Insertion hole 31 2nd cam 31a Insertion hole 32 Insertion holding member 32a Insertion hole 32b Insertion hole 33 Stopper 34 Center shaft 35 Motion detection part 36 Buffer 37 Holding screw alloy tool 38 Holding screw alloy Ingredients

Claims (1)

A car guide and a counterweight that can be moved up and down in the hoistway via the main rope, a car guide rail and a counterweight guide rail that guides the elevator and the counterweight respectively, and during maintenance A maintenance fixing device having a connecting member for fixing the counterweight to the counterweight guide rail, and a hoisting machine that drives the elevator car and the counterweight up and down via the main rope. In the elevator equipment
The maintenance fixing device includes a storage unit that stores the connection member in a steady state, and a detection unit that detects that the connection member has been removed from the storage unit and turns off the hoisting machine. A plurality of fixing rod-shaped members are used as the connecting members, and an insertion holding member for inserting and storing the fixing rod-shaped member from an insertion hole in the storage unit, and the insertion hole in the insertion holding member A position where the insertion side of the insertion hole is closed and the detection portion is reset when the fixing rod-shaped member is moved from the insertion hole to a position where it can be inserted, and a position where the cam is closed on the insertion side of the insertion hole And the cam is held at a position where the detection unit is reset by the fixing rod-like member when inserted from the insertion hole and stored in the storage unit. When the member is removed from the storage unit, it is placed at a restriction position by the stopper by an elastic urging force to close the insertion side of the insertion hole, and the detection unit removes at least one of the fixing rod members from the storage unit. An elevator apparatus characterized by detecting that it has been taken out .

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