JPWO2019180932A1 - Elevator emergency stop device - Google Patents

Abstract

An elevator emergency stop installed on the elevator car or counterweight to stop the car or counterweight by sandwiching the guide rail of the car or counterweight with a braker with friction material installed when the elevator is overspeeding. In the device, an inserted portion that is provided on the brake element and that is joined by inserting a friction material, and a friction material and a friction material that are respectively provided on the friction material and the insertion portion when the friction material is inserted into the insertion portion. A fixed part for fitting and holding the inserted part to each other, and one of the fixed parts is formed with a projection inclined in the forward or reverse direction, and the other part can be caught by the projection. It is characterized in that an engaging portion is formed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency stop device for an elevator in which an emergency stop is performed by sandwiching a guide rail with a wedge to which a friction material is attached in an emergency such as a sudden descent of an elevator car.

In order to prevent plastic deformation or melting of the friction material attached to the surface of the wedge that is pressed against the guide rail during an emergency stop, the friction material made of ceramic material is inserted and held. There is an elevator emergency stop device (Patent Document 1).

JP-A-7-41272

However, in such an elevator emergency stop device, since an adhesive is used as a means for fixing the friction material to the brake shoe, it is necessary to monitor the condition of the adhesive surface and control the temperature. There was a problem that it took time. Further, when the labor of such a manufacturing process is reduced or the frequency of maintenance work is reduced, there is a problem that the friction material comes off the brake shoe with the passage of time and falls off from the brake shoe.

The present invention has been made to solve the above problems, and an object thereof is to insert a friction material into a surface of a brake element, which is pressed against the guide rail side at the time of an emergency stop, to face the guide rail, and to bond the friction material. It is an object of the present invention to provide an elevator emergency stop device that can be held without using an agent.

An elevator emergency stop device according to the present invention is provided in a car or a counterweight of an elevator, and when the elevator is overspeed, a guide rail of the car or the counterweight is provided by a brake shoe braker to which a friction material is attached. In an emergency stop device for an elevator that sandwiches and stops a car or a counterweight, in the inserted portion into which the friction material provided in the brake element brake element is inserted, and in the friction material and the inserted portion, the friction material is provided. A protrusion that fits and holds the friction material and the inserted portion when inserted into the inserted portion, and one of the fixing portions has a protrusion inclined in the forward direction or the reverse direction. Is formed, and on the other side, an engaging portion that can be caught by the protrusion is formed.

The present invention can realize an elevator emergency stop device in which a friction material is inserted into a surface of a brake element which is pressed against the guide rail side at the time of emergency stop and which faces the guide rail, and which can be held without using an adhesive.

FIG. 1 is a front view showing the entire safety device according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view (cross-sectional view) showing the safety device of FIG. 1 according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view (side view) showing the safety device of FIG. 1 according to Embodiment 1 of the present invention. FIG. 3 is an enlarged view (cross-sectional view) showing a main part (before attachment) of the safety device of FIG. 2 according to Embodiment 1 of the present invention. FIG. 3 is an enlarged view (cross-sectional view) showing a main part (after attachment) of the safety device of FIG. 2 according to Embodiment 1 of the present invention. FIG. 4 is an enlarged view (side view) showing the safety device of FIG. 3 according to Embodiment 1 of the present invention. FIG. 3 is an enlarged view (cross-sectional view) showing an operation of the safety device of FIG. 1 according to Embodiment 1 of the present invention. It is an enlarged view (cross section) which shows the principal part (after attachment) of the safety gear device by Embodiment 2 of this invention. It is an enlarged view (side view) which shows the safety device by Embodiment 2 of this invention. It is an enlarged view (side view) which shows the safety device by Embodiment 3 of this invention.

Embodiment 1.
1 to 7 illustrate an elevator emergency stop device according to Embodiment 1 of the present invention. FIG. 1 is a front view showing the entire emergency stop device, and FIG. 2 is an enlarged view showing the emergency stop device of FIG. 3 is an enlarged view (side view) showing the safety device of FIG. 1. 4 is an enlarged view (cross-sectional view) showing an essential part (before attachment) of the safety device of FIG. 2, and FIG. 5 is an enlarged view (cross-sectional view) showing an essential part (after attachment) of the emergency stop device of FIG. 6 is an enlarged view (side view) showing the safety device of FIG. 3, and FIG. 7 is an enlarged view (cross-sectional view) showing the operation of the safety device of FIG. It should be noted that door cage devices, door motors, and the like as elevator car devices are not shown.

In the figure, an emergency stop device 1 has a pair of brake shoes 2 formed in a trapezoidal cross section, and the brake shoes 2 have short sides on the upper end side and long sides on the lower end side. The pair of brake elements 2 are arranged substantially parallel to the guide rail 3 with a slight gap therebetween so that the guide rail 3 can be held. The back surface of the brake shoe 2 is a wedge-shaped smooth inclined surface that narrows upward. The brake element 2 is provided on a guide member 4 having a guide portion that guides the movement so that the brake element 2 moves to a predetermined position. The guide member 4 has an inclined surface parallel to the inclined surface of the brake shoe 2 on the inside and a vertical surface on the outside, and the vertical surface is sandwiched by elastic bodies (not shown). The outer peripheral portion of the guide member 4 is surrounded by a U-shaped elastic body having an open side facing the guide rail 3. The brake shoe 2, the guide member 4, and the elastic body are housed in a housing (not shown), and one end of the brake shoe 2 has a pull-up rod (shown in the figure) provided by a drive means (not shown) for activating the safety gear 1. Not) is connected.

The guide member 4 has an inclined surface parallel to the inclined surface of the brake element 2, and the back surface of the guide member 4 is a vertical surface. Therefore, the vertical surface of the guide member 4 should be sandwiched between elastic members. Has become. Therefore, when the safety device 1 operates, the brake shoe 2 is pulled up with respect to the guide member 4 and pushes the guide member 4 apart. The reaction force that the guide member 4 is spread out acts on the brake shoe 2, and the brake shoe 2 moves so that the mutual distance is narrowed, and the guide rail 3 is sandwiched. The brake shoe 2 includes a support (not shown) in the form of a quadrangular prism made of cast iron, and a plurality of friction members 5 (five, two rows in this embodiment) coupled to the guide rail facing surface side of the support. Equipped with. The friction material 5 is a high performance ceramic such as silicon nitride, silicon carbide, alumina and sialon.

An inserted portion 6 into which the friction material 5 is inserted and joined is provided on the vertical surface of the brake shoe 2. When the friction material 5 is inserted into the inserted portion 6, the friction material 5 and the inserted portion 6 are fitted to each other inside the inserted portion 6 as one of the fixing portions 7 that can hold the friction material 5 and the inserted portion 6. A plurality of protrusions 8 are provided on both sides in the vertical direction. The protrusion 8 is formed so as to project from the inner surface of the inserted portion 6 by 1 to 2 mm and is inclined in the normal direction when viewed from the side where the friction material 5 is inserted into the inserted portion 6. The inner diameter of the inserted portion 6 including the protrusion 8 is formed to be smaller than the outer diameter of the friction material 5 by 1 to 2 mm.

Therefore, when the friction material 5 is inserted into the inserted portion 6, the surface of the friction material 5 comes into contact with the protrusion 8 and a pressing force that compresses in the height direction acts on the tip portion of the protrusion 8. That is, the protrusion 8 is formed of an elastic body that is elastically deformable in the height direction without being easily broken even if the height direction is compressed by 0.5 to 1 mm. Further, when the friction material 5 is inserted into the inserted portion 6, the protrusion 8 has an elastic force capable of contacting the surface of the friction material 5 and continuously pressing the friction material 5 itself.

Further, when the safety device 1 is operated, an urging force that is pressed against the bottom surface of the inserted portion 6 acts on the friction material 5, so that the friction material 5 is stably broken without being easily broken by the urging force. It is formed of an elastic body that can be held by. The protrusion 8 is formed of, for example, a metal material having elastic characteristics such as copper or steel. As a method of forming the protrusions 8, for example, after processing a burr-shaped protrusion on the inner surface of the inserted portion 6 and inclining in a forward direction with a pressure roller, or by spraying from the outside of the inserted portion 6. There is a method of forming the protrusion 8 by doing so.

The friction material 5 is provided with the other of the fixing portions 7 that allow the friction material 5 and the inserted portion 6 to be engaged with each other and held when the friction material 5 is inserted into the inserted portion 6. The fixing portion 7 is provided with an engaging portion 9 that can be caught by the protrusion 8. The engaging portions 9 are provided on both sides of the friction material 5 in the vertical direction, and have an uneven shape formed of a plurality of concave portions and convex portions. The concavo-convex shape of the engaging portion 9 is generated by the sintering process of the friction material 5 or is processed by cutting the surface, and the height difference between the concave portion and the convex portion is about 0.1 to 0.5 mm. Has become. That is, when the friction material 5 is inserted into the inserted portion 6, the concave portion or the convex portion of the engaging portion 9 and the tip of the projection 8 come into contact with each other to be caught, and elastically deform to cause friction due to the repulsive force of the projection 8. The material 5 is stably held by the inserted portion 6.

Next, the operation of the first embodiment configured as described above will be described. First, when fixing the friction material 5 to the brake element 2, when the friction material 5 is inserted while being pushed into the insertion portion 6, the engaging portion 9 of the friction material 5 and the projection 8 of the insertion portion 6 come into contact with each other. Meanwhile, the protrusion 8 is pressed by the engaging portion 9. As a result, the protrusion 8 is deformed so that the height direction becomes lower. At this time, since the projection 8 is inclined in the forward direction when viewed from the side where the friction material 5 is inserted into the inserted portion 6, the friction material 5 can be pushed in without being caught by the projection 8. Further, when the friction material 5 is pushed in until it abuts against the inner side of the inserted portion 6, the friction material 5 is held at that position. When the friction material 5 is pushed into the depth side of the inserted portion 6, the protrusion 8 and the engaging portion 9 are fitted to each other, and the protrusion 8 has a repulsive force for returning to the original height from the deformed position. Works. The repulsive force of the projection 8 continuously presses the engaging portion 9, so that the friction material 5 is stably held by the inserted portion 6.

Next, when the safety device 1 is operated, the upper portion of the brake element 2 is sandwiched by the wedge-shaped guide member 4, so that a biasing force acts in the direction in which the friction material 5 is pushed toward the guide member 4 side. Therefore, the friction material 5 does not easily come off the inserted portion 6.

As described above, according to the first embodiment, the guide rail of the car or the counterweight is provided on the car or the counterweight of the elevator, and when the elevator is overspeed, the brake bar 2 having the friction material 5 attached thereto is used for the car or the counterweight. In an emergency stop device 1 for an elevator that sandwiches 3 to stop a car or a counterweight, an inserted portion 6 that is provided on the brake element 2 and that is joined by inserting the friction material 5, and the friction material 5 and the insertion portion 6 And a fixing portion 7 which is provided on the fixing member 7 and can hold the friction material 5 and the inserted portion 6 by being fitted to each other when the friction material 5 is inserted into the inserted portion 6. A protrusion 8 that is inclined in the forward direction when viewed from the side where the friction material 5 is inserted into the inserted portion 6 is formed on one side, and an engaging portion 9 that can be caught by the protrusion 8 is formed on the other side. Allows the guide rail to be used during an emergency stop. It is possible to insert the friction member 5 on the surface facing the guide rail 3 brake shoe 2 is pressed against the side, to provide a safety device 1 of the elevator to be held without using an adhesive.

Embodiment 2.
8 to 9 illustrate an elevator emergency stop device according to Embodiment 2 of the present invention. FIG. 8 is an enlarged view (cross-sectional view) showing an essential part (after attachment) of the emergency stop device, and FIG. It is an enlarged view (side view) which shows an emergency stop device. The elevator emergency stop device according to the second embodiment of the present invention is different in that the protrusion is formed on the lower side in the vertical direction, and the same symbols are added to the other similar portions and the description thereof will be omitted.

In the figure, the protrusion 10 is provided on the lower side in the vertical direction of the inserted portion 11. The engaging portion 12 is formed on a surface facing the protrusion 10 when the friction material 13 is inserted into the inserted portion 11. The engaging portion 12 is provided on the lower side in the vertical direction of the friction material 13 and has an uneven shape including a plurality of concave portions and convex portions. When the friction material 13 is inserted into the inserted portion 11, the lower surface of the friction material 13 is in contact with the protrusion 10, and a pressing force that compresses in the height direction acts on the tip end of the protrusion 10. There is. The upper surface of the friction material 13 is arranged in contact with the inside of the inserted portion 11.

Next, the operation of the second embodiment configured as described above will be described. When the safety device 1 operates and the friction material 13 contacts the guide rail 3, the guide rail 3 moves relatively upward when viewed from the friction material 13. As the guide rail 3 moves relatively upward, an urging force is applied to the friction material 13 to pull it upward while contacting the guide rail 3. At this time, the friction material 13 is pulled up while being held by the inserted portion 11 and displaced upward.

At this time, in the first embodiment, the protrusion 8 arranged on the upper side of the inserted portion 6 can be buckled by being sandwiched between the friction material 5 displaced upward and the upper inner surface of the inserted portion 6. There is a nature. In the second embodiment, the protrusion 10 arranged below the inserted portion 11 is not affected by the friction material 13 because the friction material 13 is displaced upward. That is, when the friction material 13 is displaced to the upper side of the inserted portion 11, the engaging portion 12 is continuously pressed upward by the repulsive force of the protrusion 10 arranged on the lower side. It is stably held by the inserted portion 11.

As described above, according to the second embodiment, the protrusion 10 is provided at least on the lower side in the vertical direction of the inserted portion 11, and when the friction material 13 is inserted into the inserted portion 11, the protrusion 10 faces the protrusion 10. Since the engaging portion 12 is formed on the contact surface, the friction material 13 is inserted into the surface of the brake element 2 that is pressed against the guide rail 3 side at the time of emergency stop and that faces the guide rail 3, without using an adhesive. It is possible to provide the elevator emergency stop device 1 that can be held.

Further, since the protrusion is not formed on the upper side of the inserted portion 11, the manufacturing cost of the brake shoe 2 can be suppressed. Further, since the protrusion 10 and the engaging portion 12 are formed on the lower side and the upper portion of the friction material 13 is disposed in contact with the inserted portion 11, the same effect as that of the first embodiment can be obtained. .

Embodiment 3.
10 is an enlarged view (side view) showing an emergency stop device for explaining an elevator emergency stop device according to a third embodiment of the present invention. The emergency stop device for an elevator according to Embodiment 3 of the present invention is different in that projections are formed on both sides in the vertical direction and on both sides in the horizontal direction, respectively, and the same symbols are added to the other similar portions and the description will be given. Omit it.

The protrusions 14 are provided on both sides of the inserted portion 15 in the vertical direction and on both sides of the inserted portion 15 in the horizontal direction. When the friction material 16 is inserted into the inserted portion 15, the engaging portion 17 is formed on the surface facing the protrusion 14.

When the safety device 1 operates, the friction material 16 is pulled up while being held by the inserted portion 15 and is displaced upward. At this time, in the first embodiment, the protrusion 8 arranged on the upper side of the inserted portion 6 can be buckled by being sandwiched between the friction material 5 displaced upward and the upper inner surface of the inserted portion 6. There is a nature. In the third embodiment, the projections 14 arranged on both sides of the inserted portion 15 in the horizontal direction are not affected by the friction material 16 because the friction material 16 is displaced upward. That is, when the friction material 16 is displaced to the upper side of the inserted portion 15, the engaging portion 17 is continuously pressed upward by the repulsive force of the protrusion 14 arranged on the lower side. Further, the engaging portion 17 is continuously pressed toward the horizontal center of the inserted portion 15 by the repulsive force of the protrusions 14 arranged on both sides in the horizontal direction, so that the friction material 16 is inserted into the inserted portion 15. It is stably held at 15.

As described above, according to the third embodiment, the protrusion 14 is provided at least on the lower side of the inserted portion 15 in the vertical direction, and is provided on at least one side of the inserted portion 15 in the horizontal direction. When the material 16 is inserted into the inserted portion 15, the engaging portion 17 is formed on the surface facing the protrusion 14, so that the guide rail 3 of the brake shoe 2 is pressed against the guide rail 3 side during an emergency stop. It is possible to provide the elevator emergency stop device 1 in which the friction material 16 is inserted into the opposing surfaces of the elevators and can be held without using an adhesive.

Further, when the safety device 1 operates and the protrusion 14 provided on the upper side of the inserted portion 15 buckles, the friction material 16 is removed from both sides by the protrusion 14 arranged below the inserted portion 15 and horizontally. Since it can be held, it can be held more stably.

In the first embodiment, the projection 8 is formed on the inserted portion 6 and the friction material 5 of the engaging portion 9 is formed in an uneven shape, but the projection 8 is formed on the friction material 5 of the engaging portion 9. However, it goes without saying that the same action and effect can be obtained even if the concavo-convex shape is formed in the inserted portion 6. Further, the second to third embodiments may be similarly configured.

Further, in the first embodiment, the protrusion 8 is formed of an elastic body, but the protrusion 8 may be formed of a material having a high hardness other than the elastic body, and the uneven shape of the friction material 5 may be formed of an elastic body.・ It goes without saying that it is effective. Further, the second to third embodiments may be similarly configured.

1 Emergency Stop Device, 2 Bracket, 3 Guide Rail, 4 Guide Member, 5, 13, 16 Friction Material, 6, 11, 15 Inserted Part, 7 Fixed Part, 8, 10, 14 Protrusion, 9, 12, 17 Engagement part

The present invention relates to an emergency stop device for an elevator that causes an emergency stop of the elevator car during an emergency such as a sudden descent.

The elevator emergency stop device according to the present invention is provided in an elevator car or a counterweight, and when the elevator is overspeed, a guide bar of a car or a counterweight is sandwiched by a brake element to which a friction material is attached. In an emergency stop device for an elevator that stops the car or the counterweight, an inserted portion that is provided on the brake element and that is joined by inserting the friction material, and the friction material and the inserted portion, respectively. A fixing portion that allows the friction material and the inserted portion to be engaged with each other and held when the friction material is inserted into the inserted portion, and one of the fixing portions has an opening. projections inclined in or opposite grain direction is formed, the other is formed with the engaging portion can be caught in the projections, the projections only lower vertical direction of the inserted part Provided, when the friction member is inserted into the insertion member, and is characterized in that the engagement portion is formed on the projection surface facing.

Claims (6)

It is provided in the car or counterweight of the elevator, and when the elevator becomes overspeed, the guide rails of the car or counterweight are sandwiched by the brakes with friction material installed to stop the car or counterweight. In the stop device,
An inserted portion that is provided on the brake shoe and that is joined by inserting the friction material,
A fixing portion which is respectively provided on the friction material and the inserted portion, and which, when the friction material is inserted into the insertion portion, allows the friction material and the insertion portion to be fitted and held with each other; ,,
On one of the fixing portions, a protrusion that is inclined in the forward direction or the reverse direction is formed,
An emergency stop device for an elevator, characterized in that an engagement portion which can be caught by the projection is formed on the other side.
The elevator emergency stop device according to claim 1, wherein the protrusion is formed on the inserted portion, and the engagement portion has an uneven shape formed on the friction material.
The protrusion is provided on at least a lower side in the vertical direction of the inserted portion, and the engagement portion is formed on a surface facing the protrusion when the friction material is inserted into the inserted portion. The elevator emergency stop device according to claim 1, wherein the emergency stop device is an elevator stop device.
The protrusion is provided at least on the lower side in the vertical direction of the inserted portion, and is provided on at least one side in the horizontal direction of the inserted portion, and when the friction material is inserted into the inserted portion. The emergency stop device for an elevator according to claim 1, wherein the engagement portion is formed on a surface facing the protrusion.
The emergency stop device for an elevator according to any one of claims 1 to 4, wherein an upper portion of the friction material is disposed in contact with the inserted portion.
The elevator emergency stop device according to claim 1, wherein the protrusion is an elastic body.

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