JP2004352401A - Emergency stop device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency stop device of an elevator capable of exerting a requisite braking effect irrespective of a wear of the braking surface of a wedge piece. <P>SOLUTION: The wedge piece 9 elevates with a sink by abnormal speed of an elevating/sinking body 1 to be put in by pressure between the surface of a guide rail 2 and the pressing surface 7 of a pressure body 5 so as to brake the body 1 sinking by the pressing force of the pressure body 5. With elevation of the wedge piece 9, a projection 15 is fitted in a recess 13 formed in an upper plate 4, and the outside surface 16 of the projection 15 is engaged with a slope 14 of the recess 13. When the wedge piece 9 is worn, the outside surface 16 of the projection 15 is engaged with the slope 14 of the upper plate 4 by an elevating displacement of the wedge piece 9 to rise over the up-position of the wedge piece 9 before the braking surface 10 is worn. Accordingly the pressure body 5 is displaced in the same manner as before the braking surface 10 is worn, and it is possible to achieve the same braking effect to the same degree as before the wedge piece 9 is worn, which assures an enhanced actuation reliability. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an emergency stop device for an elevator that is provided on a lift and that brakes a lift that descends at an abnormal speed.
[0002]
[Prior art]
In a conventional emergency stop device for an elevator, a pressing body is provided on a frame body provided on an elevating body guided by a guide rail, and is urged toward the guide rail surface and is fixed to a predetermined position with respect to the guide rail surface. Held in position. Then, a pressing surface whose lower part is inclined in a direction away from the guide rail surface is formed on a surface facing the guide rail surface.
[0003]
A wedge piece is provided between both the guide rail surface and the pressing surface of the pressing body, a braking surface facing the guide rail surface is formed on one side, and an inclined surface corresponding to the pressing surface of the pressing body is formed on the other side. A surface is formed. Then, the inclined surface of the wedge piece is disposed to face the pressing surface via the roller.
[0004]
Then, the wedge piece is always arranged at the lowered position, the braking surface is formed with a gap with respect to the guide rail surface, and the wedge piece is raised when necessary and press-fitted between the two, and is pressed by the pressing body. It is pressed against the guide rail surface. In this state, the upper end of the wedge piece hits the upper plate of the frame, and stops relative to the frame.
[0005]
The conventional emergency stop device of an elevator is configured as described above, and the wedge piece is normally held at a lowered position with respect to the pressing body, and the braking surface of the wedge piece is arranged in a non-contact state with the guide rail surface. Although not shown in the drawing, when the elevating body such as a car descends at an abnormal speed, the wedge piece is raised through the operation of the governor and press-fitted between the two.
[0006]
Thus, the pressing body urged in the guide rail surface direction is displaced in the direction opposite to the guide rail surface. Therefore, the braking surface of the wedge piece is pressed against the guide rail surface by the pressing force of the pressing body, and the descent of the elevating body is braked by the friction between the braking surface of the wedge piece and the guide rail surface. (For example, see Patent Document 1).
[0007]
[Patent Document 1]
JP-A-5-147856 (page 2, FIG. 1)
[0008]
[Problems to be solved by the invention]
In a conventional elevator emergency stop device, the braking operation of the emergency stop device causes wear on the braking surface of the wedge piece, and as this wear progresses, the amount of displacement of the pressing body against the guide rail surface due to the upward displacement of the wedge piece increases. Less. For this reason, there has been a problem that the pressing force of the wedge piece by the pressing body is reduced and a required braking action cannot be obtained.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an emergency stop device for an elevator capable of obtaining a required braking action regardless of abrasion of a braking surface of a wedge piece.
[0010]
[Means for Solving the Problems]
In the emergency stop device for an elevator according to the present invention, a frame provided on an elevating body which is guided by a guide rail and ascends and descends, and is provided on the frame and urged toward a guide rail surface, and the guide rail is provided. A pressing body which is held at a predetermined position with respect to the surface and has a pressing surface formed on a surface facing the guide rail surface and having a lower end side inclined in a direction away from the guide rail surface, and a guide rail provided on the frame and provided on one side. A braking surface facing the surface is formed, and an inclined surface corresponding to the pressing surface of the pressing body is formed on the other side, and the inclined surface is arranged to face the pressing surface of the pressing body via the rollers, Is disposed at a lowered position, a braking surface is formed with a gap with respect to the guide rail surface, and a wedge piece which is raised when necessary and press-fitted between the guide rail surface and the pressing surface of the pressing body; Form the upper part of the body and form a gap in the guide rail A concave portion is provided, and an upper plate having an inclined surface corresponding to the pressing surface of the pressing body formed on an inner surface facing the guide rail surface of the concave portion, and is provided to project upward from an upper end surface of the wedge piece. The wedge piece is arranged at a position where it fits into the recess of the upper plate when the wedge piece is raised, and a convex portion having an outer surface inclined corresponding to the pressing surface of the pressing body is formed on a surface facing the inclined surface of the recess. Provided.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
1 to 4 show an example of an embodiment of the present invention. FIG. 1 is a front view of an emergency stop device, FIG. 2 is a plan view conceptually showing an arrangement of related members in FIG. FIG. 1 is a diagram corresponding to FIG. 1 showing a braking operation state of the safety device, and FIG. 4 is a diagram corresponding to FIG. 1 showing another braking operation condition of the safety device. In the figure, a guide rail 2 for guiding an elevator 1 composed of an elevator car is provided upright on an elevator shaft (not shown).
[0012]
The frame 3 is provided below the elevating body 1, and the upper plate 4 of the frame 3 is arranged in contact with the elevating body 1. In addition, the longitudinal middles of the pressing members 5 disposed on both sides of the guide rail 2 are pivotally connected to the frame 3 by the vertical shaft 6, and the lower end of the pressing member 5 is separated from the guide rail 2 at the surface facing the guide rail 2. A pressing surface 7 inclined in the direction is formed, and is held at a predetermined position away from the guide rail 2 surface by a holder described later.
[0013]
A biasing body 8 made of a compression coil spring is disposed at an end of the pressing body 5 on the side opposite to the pressing surface 7, and moves away from the opposite end of the pressing body 5 on the side of the opposite pressing surface 7. Energize. The wedge pieces 9 are respectively arranged on both sides of the guide rail 2 surface, a braking surface 10 facing the guide rail 2 surface is formed on one side, and an inclined surface corresponding to the pressing surface 7 of the pressing body 5 on the other side. 11 is formed, and the inclined surface 11 is arranged to face the pressing surface 7 of the pressing body 5 via the rollers 12.
[0014]
A recess 13 is formed in the upper plate 4 of the frame 3 to form a gap in the guide rail 2 and fit into the guide rail 2. An inner surface of the recess 13 facing the guide rail 2 surface has a pressing surface 7 of the pressing body 5. Is formed. Further, a convex portion 15 is provided so as to protrude upward from the upper end surface of the wedge piece 9, and is disposed at a position where the convex portion 15 fits into the recess 13 of the upper plate 4 when the wedge piece 9 described later rises. An outer surface 16 that is inclined in correspondence with the pressing surface 7 of the pressing body 5 is formed on the surface facing the pressing member 5.
[0015]
Further, there is provided a holder 17 made of a bolt which is screwed into the frame 3 and is arranged on the outer surface of the end of the pressing body 5 on the biasing body 8 side. Then, the rotational displacement of the pressing body 5 urged by the urging body 8 is always blocked at a predetermined position. As a result, the pressing surface 7 of the pressing body 5 is held at a predetermined position away from the guide rail 2 surface, and a gap is formed between the guide rail 2 surface and the braking surface 10 of the wedge piece 9.
[0016]
In the emergency stop device for an elevator configured as described above, the wedge piece 9 is normally held at the lowered position with respect to the frame 3, that is, the pressing body 5, and as shown in FIG. Are arranged on the guide rail 2 surface in a non-contact state. Although the illustration is omitted when the elevator 1 such as a car descends at an abnormal speed, the wedge piece 9 ascends through the operation of the speed governor to push the wedge piece 9 to the surface 12 of the guide rail, that is, the pressing of the pressing body 5. It is press-fitted with the surface 7.
[0017]
Thus, the pressing body 5 urged in the direction of the guide rail 2 is displaced in the direction opposite to the guide rail 2. Accordingly, the braking surface 10 of the wedge piece 9 is pressed against the guide rail 2 surface by the pressing force of the pressing body 5 based on the urging body 8, and the lifting body 1 is moved by friction between the braking surface 10 of the wedge piece 9 and the guide rail 2 surface. Is braked.
[0018]
In addition, the wedge piece 9 rises, and the convex portion 15 is fitted into the concave portion 13 of the upper plate 4 to be in a state shown in FIG. Then, in the state shown in FIG. 3 in which the wedge piece 9 is raised, the outer surface 16 of the projection 15 engages with the inclined surface 14 in the recess 13 of the upper plate 4 and the upward displacement of the wedge piece 9 stops at a predetermined position. .
[0019]
Further, the following operation can be obtained by such a configuration. That is, when the braking surface 10 of the wedge piece 9 is worn and the width dimension of the wedge piece 9 in FIG. 1 is reduced, the wedge piece 9 is positioned above the braking surface 10 corresponding to the wear dimension of the braking surface 10 before wear. Displaced upward to the position. Thereby, as shown in FIG. 4, the wedge piece 9 stops at a predetermined position when the braking surface 10 is worn due to the engagement between the outer surface 16 of the protrusion 15 and the inclined surface 14 of the recess 13 of the upper plate 4.
[0020]
Therefore, the pressing body 5 is displaced in the direction opposite to the guide rail 2 surface in the same manner as before the braking surface 10 is worn due to the upward displacement of the wedge piece 9 where the braking surface 10 is worn. Therefore, regardless of the wear of the braking surface 10 of the wedge piece 9, the same required braking action as before the wear is obtained, and the operation reliability of the safety device can be improved. In addition, the work of replacing the wedge piece 9 with the worn braking surface 10 can be omitted, and the maintenance cost can be reduced.
[0021]
【The invention's effect】
As described above, the present invention provides a frame provided on an elevating body that is guided by a guide rail and moves up and down, and is provided on the frame and urged toward a guide rail surface, and at the same time, against the guide rail surface. A pressing body having a pressing surface formed on a surface facing the guide rail surface, the lower end of which is inclined in a direction away from the guide rail surface, and a pressing member provided on the frame and facing the guide rail surface on one side. A braking surface is formed on the other side, and an inclined surface corresponding to the pressing surface of the pressing body is formed on the other side, and this inclined surface is arranged to face the pressing surface of the pressing body via the rollers, and is always in the lowered position. A wedge piece, which is arranged so that a braking surface forms a gap with respect to the guide rail surface, is raised when necessary, and is press-fitted between the guide rail surface and the pressing surface of the pressing body, and an upper portion of the frame body The guide rail is provided with a recess to fit and form a gap in the guide rail. An upper plate having an inclined surface corresponding to the pressing surface of the pressing body formed on an inner surface facing the guide rail surface of the concave portion, and an upper plate which is provided to project upward from an upper end surface of the wedge piece to raise the wedge piece. And a convex portion having an outer surface which is inclined corresponding to the pressing surface of the pressing body is provided on a surface facing the inclined surface of the concave portion.
[0022]
As a result, the wedge piece is always held at the lowered position with respect to the pressing body, and the braking surface of the wedge piece is arranged in a non-contact state with the guide rail surface. When the elevating body descends at an abnormal speed, the wedge piece rises. It is press-fitted between the guide rail surface and the pressing surface of the pressing body. Thus, the pressing body urged in the guide rail surface direction is displaced in the direction opposite to the guide rail surface, and the braking force of the wedge piece is pressed against the guide rail surface by the pressing force of the pressing body, and The lowering of the elevating body is braked by friction with the guide rail surface. Further, as the wedge piece rises, the projection fits into the recess in the upper plate, and the outer surface of the projection engages with the inclined surface in the recess in the upper plate to stop the upward displacement of the wedge piece. When the braking surface of the wedge piece is worn and the width dimension is reduced, the wedge piece is displaced upward, so that the outer surface of the projection engages with the inclined surface of the recess of the upper plate, and the wedge piece rises. The displacement stops at a position higher than before the wear of the braking surface of the wedge piece. Therefore, even when the braking surface of the wedge piece is worn, the pressing body is displaced in the direction opposite to the guide rail surface due to the upward displacement of the wedge piece in the same manner as before the wear of the braking surface. Therefore, regardless of the wear of the braking surface of the wedge piece, the same required braking action as before the wear is obtained, and the operation reliability of the safety device is improved. In addition, it is possible to omit the work of replacing the wedge piece having a worn braking surface, which has the effect of reducing maintenance costs.
[Brief description of the drawings]
FIG. 1 is a view showing a first embodiment of the present invention, and is a front view of an emergency stop device.
FIG. 2 is a plan view conceptually showing an arrangement of related members in FIG.
FIG. 3 is a diagram corresponding to FIG. 1, showing a braking operation state of the safety device.
FIG. 4 is a diagram corresponding to FIG. 1, showing another braking operation situation of the safety device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Elevating body, 2 guide rails, 3 frame bodies, 4 upper plates, 5 pressing bodies, 7 pressing surfaces, 9 wedge pieces, 10 braking surfaces, 11 inclined surfaces, 12 rollers, 13 recesses, 14 inclined surfaces, 15 convex portions , 16 exterior.

Claims (1)

A frame provided on an elevating body that is guided by the guide rails and moves up and down, and provided on the frame and urged toward the guide rail surface and held at a predetermined position with respect to the guide rail surface; A pressing body having a pressing surface inclined at a lower end side away from the guide rail surface on a surface facing the guide rail surface, and a braking surface provided on the frame body and facing the guide rail surface on one side. Is formed on the other side, and an inclined surface corresponding to the pressing surface is formed, and the inclined surface is arranged to face the pressing surface via a roller, and is always arranged at a lowered position and the guide rail is provided. The braking surface is arranged with a gap formed with respect to the surface, and the wedge piece which is raised when necessary and is press-fitted between the guide rail surface and the pressing surface, and the guide rail which constitutes an upper portion of the frame body Is provided with a recess to form and fit An upper plate having an inclined surface corresponding to the pressing surface formed on an inner surface of the recess facing the guide rail surface, and an upper plate protruding upward from an upper end surface of the wedge piece, and An emergency stop device for an elevator, wherein the emergency stop device is provided at a position where the concave portion of the plate is fitted, and has a convex portion having an outer surface inclined at a position facing the inclined surface of the concave portion corresponding to the pressing surface.

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