JP5448866B2 - Elevator emergency stop device - Google Patents

Description

  The present invention relates to an emergency stop device for an elevator.

  Conventional elevator safety devices generally operate in an emergency, such as when the speed of a moving object such as a car or counterweight exceeds a certain value, and a wedge-shaped member is It is a braking device that is inserted between a guide member attached to a moving body and a guide rail to perform a braking action.

  Such an elevator safety device includes a main body block provided on a car that moves along the guide rail of the elevator, and a pair of guide surfaces that are supported by the main body block and that are inclined and face the guide rail. A wedge receiver and a wedge member which is provided between the inner surface of the wedge receiver and the guide rail and is inserted between the wedge receiver and the guide rail according to the excessive speed of the car and performs a braking action are provided. The elevator safety device also includes a substantially U-shaped pressing spring that presses the wedge receiver toward the guide rail, and restricts the wedge receiver to the main body block between the wedge receiver and the main body block. In order to hold it so that it can be moved, there is provided an engagement mechanism comprising a step engaging with each other as a fitting portion and a receiving portion, and a spacer inserted between the steps (for example, Patent Document 1). reference).

Japanese Patent Laid-Open No. 4-116078

  In such a conventional apparatus, a step is provided in the main body block and the wedge receiver, the steps are engaged with each other, and a spacer is inserted between them to facilitate assembly, disassembly, and adjustment. The wedge receiver, the main body block, and the spacer in the engagement mechanism between the wedge receiver and the main body block must be structured to withstand the pressing force of the wedge member during operation, and when the emergency stop device is activated The wedge receiver must be able to move smoothly with respect to the main body block, and it is required to reduce the number of parts in order to reduce the size and simplify the structure of the elevator emergency stop device. It was a big problem given to the stop device.

  Accordingly, an object of the present invention is to provide an emergency stop device for an elevator that has a small number of parts and can be miniaturized, can be reliably operated, and has high reliability.

  According to the present invention, a support frame provided on a moving body that moves along a guide rail of an elevator, and a pair of guide surfaces that are supported by the support frame and have a guide surface that is inclined and faces the guide rail. A guide member is provided between the guide surface of the guide member and the guide rail, and moves between the guide surface and the guide rail according to an excessive speed of the moving body to perform a braking action. A wedge member, a spring for biasing the guide member toward the guide rail, and a movement that is provided between the guide member and the support frame to restrict the guide member relative to the support frame. In an elevator emergency stop device having an engagement mechanism for holding the guide pin, the engagement mechanism between the guide member and the support frame engages and guides the guide pin and the guide pin. Guide groove to hold Safety device for an elevator is obtained, characterized in that it comprises a.

  According to the present invention, it is possible to obtain an emergency stop device for an elevator that has a small number of parts, can be downsized, can be reliably operated, and has high reliability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view showing an elevator provided with an elevator safety device according to an embodiment of the present invention. It is an enlarged side view of the emergency stop device of the elevator of FIG. It is a top view of the emergency stop apparatus of the elevator of FIG. It is a front view of the emergency stop device of the elevator of FIG. It is a disassembled perspective view which shows a part of emergency stop apparatus of the elevator of FIG.

  Embodiments of the present invention will be described below.

Embodiment 1 FIG.
The elevator shown in FIG. 1 includes a car 2 that is a moving body guided and moved along a guide rail 1, a main rope 3 that is connected to the top wall of the car 2 to raise and lower the car 2, and a main rope 3. And a counterweight 6 connected to the other end of the main rope 3 extending from the hoisting machine 4 through the deflecting wheel 5. Although not shown in the figure, the counterweight 6 is guided and supported by the guide rail 1 so as to move up and down in the direction opposite to that of the car 2. In this sense, the counterweight 6 is also a moving body. . The car frame 7 of the car 2 is connected to the governor rope 10 of the speed governor 9 by the connection bracket 8, and the governor rope 10 moves simultaneously with the movement of the moving body such as the car 2. An overspeed signal can be generated by detecting that the body has reached an overspeed exceeding a predetermined speed.

  An elevator emergency stop device 11 according to the present invention is attached to the car frame 7 of the car 2 and grips the guide rail 1 according to an overspeed signal from the governor 9 to apply a braking force. In the illustrated example, only one elevator safety device 11 is provided in the car 2. However, a plurality of elevator safety devices 11 may be provided, and may also be provided in the counterweight 6 that is a moving body.

  2 to 5, an elevator safety device 11 is supported by a support frame 12 provided on a car 2, which is a moving body that moves along a guide rail 1 of the elevator, and a guide frame 12. A pair of guide members 14 having a guide surface 13 that is inclined and opposed to the rail 1, and an excessive speed of the car 2 that is provided between the guide surface 13 of the guide member 14 and the guide rail 1 and is a moving body. Accordingly, a wedge member 15 that moves between the guide surface 13 and the guide rail 1 so as to enter between them and performs a braking action, and a spring 16 that biases the guide member 14 toward the guide rail 1 are provided. .

  The support frame 12 is a groove-shaped member having a U-shaped cross section as a whole having a first support plate 17 and a second support plate 18 that are parallel to each other and are separated in the ascending / descending direction of the car 2 in the illustrated example. Although not shown, it is attached to the car frame 7 by an appropriate means such as a mounting bolt or a bracket. A cut 19 is formed in each of the first support plate 17 and the second support plate 18 so that the guide rail 1 can be received in the cut 19. The first support plate 17 and the second support plate 18 are also provided with holding grooves 20 so as to cross the notches 19 or at positions corresponding to the guide rails 1, and both end portions of the guide member 14 are included therein. And can be guided and held so as to be movable in the direction toward the guide rail 1. The first support plate 17 and the second support plate 18 also have guide pins 21 inserted from the outer surfaces of the first support plate 17 and the second support plate 18 and protruding from the bottom wall of the holding groove 20. Is provided.

  The guide member 14 is a plate-like member having a guide surface 13 inclined with respect to the guide rail 1, and a back surface 22 on the opposite side of the guide surface 13 is parallel to the guide rail 1. Both end portions 23 between the two have an end surface 24 perpendicular to the guide rail 1 and are received in the holding groove 20 of the support frame 12 and are guided and held so as to be movable only in the direction of the holding groove 20. ing. Guide grooves 25 that engage the guide pins 21 of the first and second support plates 17 and 18 of the support frame 12 are provided on the end surfaces 24 of both end portions 23 of the guide member 14. The guide groove 25 is formed in the end surface 24 of the both end portions 23 of the guide member 14 in parallel with the holding groove 20, and the end portion on the side close to the guide rail 1 is open to the inclined guide surface 13. The end on the side far from the center does not reach the back surface 22 but is closed halfway, and the planar shape is substantially U-shaped. Therefore, the range in which the guide member 14 can move is only in the direction toward the guide rail 1 along the holding groove 20, and the direction toward the guide rail 1 by the engagement of the guide pin 21 and the guide groove 25 with one end closed. The travel distance is limited.

  Thus, the guide pin 21 provided on the first and second support plates 17 and 18 of the support frame 12 and the guide groove 25 provided on the guide member 14 to engage and hold the guide pin 21. Thus, an engagement mechanism 26 that is provided between the guide member 14 and the support frame body 12 and holds the guide member 14 so as to be restricted in one direction relative to the support frame body 12 is configured. ing.

  The wedge member 15 provided between the guide surface 13 of the guide member 14 and the guide rail 1 responds to an overspeed signal supplied from the governor 9 according to the overspeed of the car 2 as a moving body. It is pulled up and moves between the guide surface 13 of the guide member 14 and the guide rail 1 so as to enter between them, and performs a braking action. A roller 28 attached to a holder 27 attached to the guide member 14 is provided between the wedge member 15 and the guide member 14, and friction between them is reduced. The wedge member 15 has a braking surface 29 on the side facing the guide rail 1.

  The spring 16 that biases the guide member 14 toward the guide rail 1 is substantially U-shaped as a whole, and each end portion is disposed so as to bias the back surface 22 of the guide member 14 toward the guide rail 1. . An adjusting plate 30 and a pressing pin 31 are provided between the spring 16 and the guide member 14. The guide member 14 pressed toward the guide rail 1 by the spring 16 has its closed end of the guide groove 25 at both ends 23 engaged with the guide pin 21 of the support frame 12 so that further movement is restricted. Since the both ends 23 are held by the holding grooves 20 of the support frame body 12, the posture is also held. That is, the guide member 14 is held in a prestressed state with respect to the support frame 12 by the spring 16 and the engagement mechanism 26. Therefore, when the wedge member 15 is pulled up and a force is applied to the guide member 14 to move away from the guide rail 1, and when this force becomes larger than the spring acting force of the spring 16, the guide pin 21 is relatively guided. The guide member 14 can move in the direction away from the guide rail 1 by moving in the groove 25.

  When assembling the elevator safety device 11, both end portions of the guide member 14 in which the holder 27 and the roller 28 are attached to the holding grooves 20 of the first support plate 17 and the second support plate 18 of the support frame 12. 23, the wedge member 15 is disposed between the guide member 14 and the guide rail 1, and U is so pressed as to straddle the back surface 22 of the guide member 14 on both sides of the guide rail 1 via the pressing pin 31. A letter-shaped spring 16 is installed. When both legs of the U-shaped spring 16 are expanded using a jig (not shown) and the adjustment plate 30 is inserted between the guide member 14 and the spring 16 and the adjustment is completed, the guide pin 21 is attached to the support frame 12 and the tip thereof is inserted into the guide groove 25 of the guide member 14. Then, the guide member 14 is guided and held by the holding grooves 20 of the first and second support plates 17 and 18, the guide pin 21 is pressed against the closed end of the guide groove 25, and the guide member 14 is supported by the support frame 12. It is stably and elastically held without backlash.

  If necessary, the operation of attaching the spring 16 may be performed before the wedge member 15 is arranged between the guide member 14 and the guide rail 1 or by placing the wedge member 15 so as to be freely movable. It can also be performed in a state in which the distance between 14 is reduced. In this state, the spring 16 can be disposed across the two guide members 14 without having to expand both the legs, and then the wedge member 15 is attached and the wedge member 15 is used for expanding the spring 16. Then, the gap between the leg portions of the guide member 14 and the spring 16 is increased against the spring acting force of the spring 16 by pushing between the guide rail 1 and the guide member 14, and the guide pin 21 is inserted into the guide groove 25. It can be held elastically at that position.

  Thus, according to the emergency stop device for an elevator, the step provided on the support frame body which has been conventionally required by the one-way engaging mechanism 26 including the guide pin 21 and the guide groove 25 is also guided. There is no need for a step provided on the member, and there is no need to provide a mounting plate that is mounted between the support frame and the guide member so as to restrict the relative position and hold the spacer. The size of the direction can be reduced, the mounting plate and its fastening bolts can be removed, and the components can be downsized and the number of parts can be reduced.

  The elevator emergency stop device illustrated and described above is merely an example for explaining the invention, and various modifications are possible, and the features of the specific examples may be used altogether or selectively combined. it can. For example, the holding groove 20 of the engaging mechanism 26 may be provided in the guide member 14 and the support frame 12 may be provided with a protrusion that engages with the holding groove. Alternatively, the guide pin 21 may be provided on the guide member 14 and the guide groove 25 may be provided on the support frame 12.

  The present invention can be used for an emergency stop device for an elevator.

  DESCRIPTION OF SYMBOLS 1 Guide rail, 2 Moving body, 3 Main rope, 4 Hoisting machine, 5 Baffle, 7 Car frame, 8 Connection bracket, 9 Speed governor, 10 Governor rope, 11 Elevator emergency stop device, 12 Support frame, 13 Guide surface, 14 Guide member, 15 Wedge member, 16 Spring, 17 First support plate, 18 Second support plate, 19 Notch, 20 Holding groove, 21 Guide pin, 22 Back surface, 23 Both ends, 24 End surface, 25 Guide groove, 26 engaging mechanism, 27 holder, 28 roller, 29 braking surface, 30 adjusting plate, 31 pressing pin.

Claims (4)

A support frame provided on a moving body that moves along the guide rail of the elevator;
A pair of guide members supported by the support frame and having guide surfaces that are inclined and face the guide rail;
A wedge member that is provided between the guide surface of the guide member and the guide rail, and that moves between the guide surface and the guide rail according to an excessive speed of the moving body to perform a braking action;
A spring biasing the guide member toward the guide rail;
An elevator emergency stop device provided with an engagement mechanism that is provided between the guide member and the support frame and holds the guide member so that the guide member can be moved with respect to the support frame. ,
The emergency stop device for an elevator, wherein the engagement mechanism between the guide member and the support frame includes a guide pin and a guide groove for engaging and holding the guide pin.   The engagement mechanism includes a holding groove that is provided on the support frame and that receives both ends of the guide member and guides and holds the guide member so as to be movable in a direction toward the guide rail. The elevator emergency stop device according to 1.   The elevator emergency stop device according to claim 1 or 2, wherein the guide pin is provided in the support frame, and the guide groove is provided in the guide member.   The support frame is first and second support plates provided at both ends of the guide member, the guide pins are provided on the first and second support plates, and the guide groove is The elevator emergency stop device according to any one of claims 1 to 3, wherein the elevator emergency stop device is provided on the guide member.

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