JPH0791005B2 - Emergency stop device for elevator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for holding a guide rail to stop an emergency car by an emergency in an elevator.

[Conventional technology]

FIGS. 6 and 7 are views showing a conventional elevator emergency stop device disclosed in, for example, Japanese Unexamined Patent Publication No. Sho 61-282282. FIG. 6 is a front view of a lifting body, and FIG. It is a figure.

In the figure, 1 is a guide rail standing upright in the hoistway, 2 is a hoistway body having a frame body 21 integrally fixed to the lower part, 4 is provided in the hoistway body 2 and is engaged with the guide rail 1. Guide shoes for guiding the lifting body 2, 5 is a speed governor rope which is wound around a speed governor (not shown) installed in a machine room above the hoistway and hangs down in the hoistway, and 6 is inside the frame 21 And a U-shaped urging body 7 which is housed in the urging body 6, and 7 is housed in the urging body 6 so as to be movable in the lateral direction, and is on one side a vertical plane facing the inner surface of the urging body 6. Is formed on the other side of the guide rail 1 and a sloping surface that spreads downward with respect to the side surface of the guide rail 1 is formed, and a blocking body press-fitted into the frame body 21 is provided with cavities 7a at the upper and lower ends of the pressing body. 8 is engaged. 9 is a holding plate inserted between the vertical surface of the pressing body 7 and the inner surface of the urging body 6, 10 is a roller device which is provided along the inclined surface of the pressing body 7, and is normally arranged in the lowered position, 11 is An inclined surface that is provided between the roller device 10 and the side surface of the guide rail 1 and is in contact with the roller device 10 is formed on one side, and is always in the lowered position, and the other side is on the guide rail 1 side.
A wedge member as a pressing member having a vertical surface for maintaining a predetermined distance from the side surface of the wedge member, and 12 is an operating mechanism that is connected to the wedge member 11 and grips the speed governor rope 5 at one end to operate as needed.

The conventional elevator emergency stop device is constructed as described above, and the wedge body 11 is normally in the lowered position as shown in FIG. 7, and a gap is maintained between the vertical surface and the side surface of the guide rail 1. The elevating / lowering body 2 moves up and down in a slumped state. Along with this, the governor rope 5 also moves up and down.

If for some reason an overspeed occurs during the lowering of the lifting / lowering body 2 and this exceeds a predetermined value, the governor operates and grips the governor rope 5. However, since the elevating body 2 continues to descend, the actuating mechanism 12 operates and the wedge body 11 is guided by the roller device 10 via the link mechanism to move upward. Due to the action of the inclined surface of the pressing body 7 and the inclined surface of the wedge body 11, the wedge body 11 moves toward the guide rail 1, and the gap between the vertical surface of the wedge body 11 and the side surface of the guide rail 1 becomes gradually smaller. Eventually they come into contact with each other. When the wedge body 11 further moves upward, the pressing body 7 is pushed outward via the roller device 10. In this way, the pressing body 7 has its void 7a.
By moving the urging body 6 in the direction of expanding the urging body 6 within the range, the urging body 6 generates a compressive force, and the wedge body 11 is pressed and slid on the side surface of the guide rail 1 to stop and grasp the elevating body 2. To do. The sandwiching plate 9 gives an initial compression force to the urging body 6.

[Problems to be Solved by the Invention]

Since the conventional elevator emergency stop device configured as described above is braked by the friction when the two surfaces of the rail 1 are pressed, the emergency stop device is large in proportion to the magnitude of the required braking force. There was a problem of shaping.

The present invention has been made in order to solve the problems of the prior art as described above, and an object thereof is to obtain an emergency stop device for an elevator that can be easily reduced in size and weight.

[Means for Solving the Problems]

The elevator emergency stop device according to the invention of this application is a rail that is erected along the hoistway and has a recess in the head portion, and is provided on the elevator provided in the hoistway so as to face the recess,
In addition, there are provided a rubbing member provided in the recess so as to be able to advance and retreat in parallel by the rotation of the link, and a pair of pressing members provided on the elevating body and capable of pressing so as to sandwich both side surfaces of the rail head. In an emergency, the rubbing member is made to enter the concave portion of the rail, and both side surfaces of the rail of the entering portion are pressed by the pair of pressing members.

[Action]

The emergency stop device according to the present invention allows the rubbing member to be present in parallel in the recess of the head in an emergency, and
By pressing the outside of the rail of this existing portion from both sides with a pair of pressing members, a frictional force is obtained by the two inner surfaces of the recess and the two outer surfaces, and the lifting body is braked. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, 100 is a rail having a U-shaped cross section, 1
01 is the recess of the rail 100. Reference numeral 13 denotes a rubbing member provided so as to face the concave portion 101, which is linked to the frame body 21.
It is provided via 14a and 14b, and is provided in parallel with the operation of the actuating mechanism 12 in the recess 101 so as to be able to advance and retreat. In addition, 22 is a shaft integrally connecting the operating mechanism 12 and the link 14b, 100a and 100b are outer surfaces of the rail 100, and 101a and 101b.
Is the inner side. The other reference numerals are the same as those in the above-mentioned conventional device, and thus the description thereof is omitted.

In the above structure, the rubbing member 13 is always present in a position retracted in parallel to the recess 101 of the rail 100 as shown by the solid line in FIGS. 1 and 3. In an emergency, a speed governor (not shown) operates like the conventional device to operate the speed governor rope 5
When is gripped, the actuating mechanism 12 is operated by lowering the elevating body 2. This operation is similar to the conventional device. At this time,
The link 14b integrally connected to the actuating mechanism 12 via the shaft 22 rotates clockwise about the shaft 22 in FIG.
The sliding member 13 connected to the link 14b is moved in parallel to the position of the chain double-dashed line shown in FIGS. 1 and 3, that is, in the recess 101 of the rail 100. In the same manner, the operation mechanism 12 presses the wedge bodies 11, 11 as a pair of pressing members so as to sandwich the outer side surfaces 100a, 100b of the rail 100 by the same operation as the conventional device. The head of the rail 100 is elastically deformed inward by the pressing force at this time, and the inner side surfaces 101a and 101b of the recess 101 press the sliding friction member 13 from both sides. This makes rail 10
0 The braking is performed using the outer surfaces 100a and 100b of the head and the inner surfaces 101a and 101b, and the elevator 2 is stopped. As described above, according to this embodiment, it is possible to obtain a braking force about twice that of the conventional device. Therefore, the required pressing force per braking force can be reduced, the size and weight of the device can be reduced, and energy saving and resource saving can be achieved. Further, it is possible to cope with the size increase and the speed increase of the lifting body 2.

Further, since the rubbing member 13 is adapted to enter and contact the recess 101 in parallel, the wear of the rubbing member 13 and the recess 101 becomes uniform, and the rubbing member 13 and the rail 100 are less damaged. .

FIG. 4 is a cross-sectional view of an essential part showing another embodiment of the present invention, which operates in the same manner as the embodiment shown in FIGS. 1 to 3 except that the rail 100 is molded from a plate material. To do. However, in the case of this embodiment, since the plate member is formed, the rail head is easily deformed, so that the pressing members 11, 11 are
There is an advantage that the pressing force of can be effectively used, the emergency stop device can be further reduced in size and weight, and the manufacturing cost of the rail itself can be reduced.

FIG. 5 shows still another embodiment of the present invention, in which the force required to deform the rail head can be made extremely small without reducing the rigidity of the entire rail, and the pressing members 11, 11 are
The pressing force of can be used more effectively. That is,
Only the part where the pressing members 11, 11 and the rubbing member 13 contact each other is the rail 1
The bent portions of 00 are closely attached to each other, and the other portions are bent with a clearance 15. This allows the rail head to be easily deformed.

Further, since the rail head has an outer wide taper shape so that the rubbing member 13 can easily enter the inside of the rail, it is not necessary to strictly control the centering accuracy of the rail 100 and the rubbing member 13 and the dimensional accuracy during rail manufacturing. Therefore, there is an effect that assembly or installation is easy.

Of course, the cross-sectional shape of the head of the rail 100 should not be interpreted as being limited to the letter U of the alphabet, in short, it is a groove into which the rubbing member 13 can enter, and its outer side surfaces. Anything can be used as long as it can press. In this sense, the shape includes, for example, a V-shape, a W-shape, and the like, and a shape obtained by combining these shapes is also included.

Further, the shape of the rubbing member 11, the advancing / retreating mechanism, and the pressing member 11
The shape and the pressing mechanism are not limited to those in the embodiment, and other mechanisms may be used.

It goes without saying that various modifications and changes can be made within the spirit of the present invention.

〔The invention's effect〕

As described above, according to the present invention, a sliding friction is provided which has a recess in the head of the rail, and which is provided on the lifting body so as to face the recess of the rail head and is capable of advancing and retracting in the recess. And a pair of pressing members provided on the elevating body and capable of pressing the rail head so as to sandwich both side surfaces of the rail head. In an emergency, the sliding friction member enters the recess of the rail, and Since both sides of the rail of the entrance portion are configured to be pressed by the pair of pressing members,
The contact area is increased, a large braking force can be obtained for its size, and the device can be made small and lightweight.

Further, since the rubbing member enters and contacts the recess in parallel with the rotation of the link, the wear of the rubbing member and the recess becomes uniform, and the rubbing member and the rail are less damaged. There is also an effect.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention, and FIG.
FIG. 4 is a side view showing an essential part of the embodiment shown in FIG. 1, FIG. 3 is a plan view showing an essential part of the embodiment shown in FIG. 1, and FIG. 4 is another embodiment of the present invention. A plan view showing an essential part, fifth
FIG. 7 is a plan view of a main part of still another embodiment of the present invention, FIG. 6 is a front view of a main part of a conventional device, and FIG. 7 is a side view of the main part of the device shown in FIG. In the figure, 2 is an ascending / descending body, 11 is a pressing member (wedge), 14a, 14
Reference numeral b is a link, 13 is a rubbing member, 100 is a rail, and 101 is a recess. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] 1. A rail having a recess in a head portion provided upright along the hoistway, a lift provided in the hoistway, the rail being provided so as to face the recess, and the link being rotated in the recess. A rubbing member provided to be able to move back and forth in parallel by movement, a pair of pressing members provided on the elevating body and capable of pressing both side surfaces of the rail head so as to sandwich the rubbing member, An emergency stop device for an elevator, characterized in that it is made to enter the recess of the rail, and both side surfaces of the rail at the entrance are pressed by the pair of pressing members. 2. The emergency stop device for an elevator according to claim 1, wherein the rail is formed of a plate material.