JP2019210099A - Accumulated grease removing device - Google Patents

Abstract

To provide an accumulated grease removing device capable of removing rope grease accumulated on a sheave and preventing the removed rope grease from being attached to the sheave again.SOLUTION: The accumulated grease removing device for removing accumulated grease from a sheave 1 around which a rope 5 is wound, includes a first stripping piece 6a and a second stripping piece 6b that are installed adjacent to each other at different positions along an outer periphery of the sheave 1 and respectively have base end parts pivotally supported to be rotatable. Spring bodies 6c giving the turning force in a direction of separating tip parts of the first and second stripping pieces from the adjacent stripping pieces are provided with respect to the first and second stripping pieces. A stopper 6d for stopping the rotation of the first and second stripping pieces in the separating direction at a predetermined rotation angle is provided.SELECTED DRAWING: Figure 1

Description

  An embodiment of the present invention relates to a deposited grease removing apparatus that removes grease accumulated on a sheave around which a rope is wound.

  In various types of mechanical equipment, a rope is wound around a sheave (also called a main wheel). In such mechanical equipment, grease is applied for lubrication between the sheave and the rope. Since this grease is replenished every certain period of time, if the machine is operated for a long period of time, the grease will accumulate on the outer periphery of the sheave and contact other equipment nearby to interfere with it. It may be scattered.

  As such a mechanical facility, a speed governor installed in a machine room or a hoistway of an elevator will be described as an example.

  As is well known, a governor rope connected to an emergency stop device for an elevator car is wound around a sheave of a governor (hereinafter referred to as a governor sheave). The governor rope normally moves up and down in synchronization with the raising and lowering of the car, and rotates the governor sheave. The governor sheave is provided with a flying weight that moves outward by centrifugal force due to the abnormal rotational speed when the rotational speed exceeds a predetermined value.

  This flying weight moves outward due to the centrifugal force described above when the car descends at an abnormal speed for some reason and the governor sheave rotates at an abnormal speed due to the governor rope moving in synchronization with the raising and lowering of the car. As a first step, a limit switch installed near the outer periphery of the governor sheave is activated to shut off the hoisting machine.

  If the car is not decelerated even by this power cut-off, and the vehicle is overspeeded, the rope gripping mechanism provided in the governor is actuated as the second stage to forcibly stop the governor rope. When the governor rope stops, the emergency stop device connected to this governor rope is activated due to the speed difference of each car, and a wedge-shaped stop member is inserted between the guide rail and the car to make an emergency stop. .

In this way, in the elevator governor, a limit switch is installed near the outer periphery of the governor sheave. There is a possibility of erroneous blockage.

Japanese Patent No. 582083 JP 2006-27762 A

  Against this background, a device for removing the rope grease accumulated on the governor sheave of the governor was considered. This removing device is made of a metal plate or the like, and uses a scraper that scrapes off grease from the governor sheave.

  According to this removal device, the accumulated rope grease can be removed from the sheave. However, if the amount of rope grease to be removed becomes large, the rope grease once removed is removed again when the sheave rotates in the opposite direction. May stick to the surface.

  Therefore, the invention according to the present embodiment is to provide a deposited grease removing device that can remove the rope grease deposited on the sheave and that the removed rope grease does not adhere to the sheave again.

  The accumulated grease removing apparatus according to an embodiment of the present invention is an accumulated grease removing apparatus that removes accumulated grease from a sheave around which a rope is wound, and is installed adjacent to different positions along the outer periphery of the sheave. The first and second strips pivotally supported at their base ends, and the first and second strips are adjacent to the second and second strips. A spring body for applying a turning force in a direction away from the one stripping piece, and rotation of the first and second stripping pieces in the separating direction, and the tip portion removes grease from the outer periphery of the sheave. And a stopper that stops at a rotation angle that keeps the strippable position.

  According to the above configuration, the rope grease deposited on the sheave can be removed, and the removed rope grease can be prevented from adhering to the sheave again, so that the deposited grease can be prevented from scattering around. In addition, it does not interfere with contact with other devices provided near the sheave, causing malfunction.

It is a block diagram of the accumulated grease removal apparatus which concerns on embodiment of this invention. It is a principal part enlarged view of the accumulated grease removal apparatus shown in FIG. FIG. 3 is a side view of FIG. 2. It is a figure explaining the malfunction occurrence situation by accumulation grease. It is explanatory drawing of the operation | movement mechanism of the accumulated grease removal apparatus which concerns on embodiment of this invention.

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

  FIG. 1 is a configuration diagram of an accumulated grease removing apparatus according to an embodiment of the present invention. In this embodiment, the sheave 1 and the rope 5 wound around the sheave 1 will be described by taking the main wheel (hereinafter referred to as governor sheave) 1 and the governor rope 5 of an elevator governor as an example.

  As shown in FIG. 1, the governor includes a governor sheave 1, a governor frame 2 that rotatably supports the governor sheave 1, and a limit switch 3 that is disposed near the outer periphery of the governor sheave 1. As described above, in the governor sheave 1, when the rotational speed becomes an overspeed state, the governor sheave 1 is actuated outward by centrifugal force, abuts and engages with the operation piece 4 of the limit switch 3, and operates the flying weight. A rope gripping mechanism is provided, but these are not shown.

  The accumulated grease removing device 6 removes accumulated grease from the governor sheave 1 around which the governor rope 5 is wound, and as shown in FIG. 2, the first stripped piece 6a, the second stripped piece 6b, and the spring body. 6c and a stopper 6d.

  The first stripping piece 6a and the second stripping piece 6b are installed adjacent to each other at different positions along the outer periphery of the governor sheave 1, and each base end portion is pivotally supported. . The first stripping piece 6a and the second stripping piece 6b may be made of wood, synthetic resin, or metal, but it is preferable to use a material having rigidity to some extent.

  The spring body 6c is a direction in which the tip portions of the spring body 6c are separated from the adjacent second stripping piece 6b and the first stripping piece 6a with respect to the first stripping piece 6a and the second stripping piece 6b. Of turning power. That is, a clockwise turning force is applied to the first stripping piece 6a and a counterclockwise turning force is applied to the second peeling piece 6b. As this spring body 6c, for example, a torsion spring provided at the pivotal support portion of the base end portion of the first stripping piece 6a and the second stripping piece 6b may be used. Of course, the spring body is not limited to the torsion spring, and any other spring body may be used as long as it provides the above-described rotational force.

  The stopper 6d stops the rotation of the first stripping piece 6a and the second stripping piece 6b in the above-described separating direction at a predetermined rotation angle. The predetermined rotation angle is a rotation angle at which the tip of the first stripping piece 6a and the second stripping piece 6b is kept at a position where the tip of the grease can be stripped off on the outer periphery of the governor sheave 1. More specifically, the rotation angle is a rotation angle that keeps the outer periphery of the governor sheave 1 at a so-called peeling position that maintains a fine gap. As shown in FIG. 3, the outer periphery of the governor sheave 1 has a groove around which the governor rope 5 is wound, and the distal ends of the first stripping piece 6a and the second stripping piece 6b are provided with the groove. It is formed so as to be engaged while maintaining a fine gap so as to wrap the tip portion including it.

  FIG. 1 shows an example in which the accumulated grease removing device 6 is directly attached to the governor frame 2 that supports the governor sheave 1. This is not a limitation.

  FIG. 4 shows that when the governor sheave 1 rotates clockwise with a large amount of rope grease 7 attached and accumulated, the rope grease 7 comes into contact with the operating piece 4 of the limit switch 3 when passing through the vicinity of the limit switch 3. It indicates that a malfunction occurs. This malfunction is not only caused by the speed governor that does not have the function of removing the rope grease 7 attached to the governor sheave 1, but also by the rope grease 7 that has been removed once in the case of having the function of removing. This can happen when it reattaches to the governor sheave 1 of the speed machine.

  Next, the removal operation of the rope grease 7 according to the present embodiment will be described with reference to FIG. As shown in FIG. 5 (a), when the governor sheave 1 rotates clockwise with the rope grease 7 being deposited, the accumulated rope grease 7 is peeled off as shown in FIG. 5 (b). It contacts the strip 6a. At this time, as shown in FIG. 6C, the first stripping piece 6a is pushed by the rope grease 7 attached to the governor sheave 1 and rotates counterclockwise in the figure against the spring force of the spring body 6c. Then, the rope grease 7 is passed. When the rope grease 7 passes, the first stripping piece 6a is pushed back by the spring force of the spring body 6c, and stops at the original stripping position by the stopper 6d as shown in FIG.

  When the governor sheave 1 continues to rotate further clockwise, the rope grease 7 comes into contact with the second stripped piece 6b provided adjacently, as shown in FIG. Since the movable range of the second stripping piece 6b is limited by the stopper 6d and the stripping position is maintained, the second stripping piece 6b is scraped off from the governor sheave 1 without passing through the rope grease 7. If the rotation direction of the governor sheave 1 is reversed before the rope grease 7 attached to the governor sheave 1 reaches the second stripping piece 6b, the rope strip 7 returns to the first stripping piece 6a. Since the movable range of the piece 6a is limited by the stopper 6d and the stripping position is maintained, the piece 6a is scraped off from the governor sheave 1 without passing through the rope grease 7.

  The rope grease 7 scraped off by the first stripping piece 6a and the second stripping piece 6b naturally falls, and as shown in FIG. 5 (f), the pivot portions of the two stripping pieces 6a and 6b. Deposits in between. Therefore, the space between the pivots serves as a reservoir for the accumulated grease that has been scraped off. Even if the rope grease 7 adheres to the governor sheave 1 again without dropping, it is stripped to either the first stripping piece 6a or the second stripping piece 6b depending on the rotation direction of the governor sheave 1 at that time. Eventually, it drops and accumulates in the storage part described above.

  In this way, the rope grease 7 that has fallen and accumulated in the storage portion can be easily maintained by periodically removing it during maintenance and inspection. That is, the grease deposited on the outer periphery of the governor sheave 1 falls and accumulates in one reservoir between the pivots of both stripped pieces 6a and 6b without being scattered around the periphery. Therefore, the maintenance inspection work becomes easy.

  For example, if a tray-shaped tray that can be taken out is provided in the storage section, the removal work of the rope grease that has been scraped off and accumulated becomes even easier.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1 ... Sieve (Governor Sieve)
2 ... governor frame 3 ... limit switch 4 ... limit switch operating piece 5 ... rope (governor rope)
6 ... Accumulated grease removing device 6a, 6b ... 1st, 2nd stripping piece 6c ... Spring body 6d ... Stopper

In various types of mechanical equipment, a rope is wound around a sheave (also called a main wheel). In such machinery, for lubrication between the sheave and the ropes, grease is applied, Ru impregnated inside the rope. This grease is deposited from the inside of the rope to the outside as the machine equipment is used. For this reason, when the mechanical equipment is operated for a long period of time, the deposited grease accumulates on the outer peripheral portion of the sheave, and may come into contact with and interfere with other adjacent devices, or may be scattered around.

Claims (3)

A device for removing accumulated grease from a sheave around which a rope is wound,
First and second stripped pieces installed adjacent to each other at different positions along the outer periphery of the sheave and pivotally supported at their respective base ends;
A spring body that applies a turning force in a direction in which the tip portion of the first and second strips is separated from the adjacent second and first strips;
A stopper that stops the rotation of the first and second stripping pieces in the separating direction at a rotation angle that keeps the tip portion at a position where the grease can be stripped from the outer periphery of the sheave;
A device for removing accumulated grease.   The space between the pivot portions of the base end portions of the first and second strips is a storage portion for the accumulated grease scraped by the first and second strips. Item 2. The apparatus for removing accumulated grease according to Item 1.   The apparatus for removing accumulated grease according to claim 2, wherein the accumulated grease storage section is provided with a tray that can be taken out.

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