JPH032011Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a manual release device for an electromagnetic brake.

[Background of the idea]

Conventionally, as a manual release device for electromagnetic brakes,
A device as shown in FIG. 3 is known. In the figure, levers 1 and 2 are connected by a connecting portion 3 to form an inverted V shape, and the levers can be opened at any angle using the connecting portion 3 as a fulcrum.

Now, if you want to manually release the brake operation, first bring the open leg ends of the levers 1 and 2 into contact with the pair of arms 5 and 6 of the electromagnetic brake 4 shown in FIG. The connecting portions 3 of the levers 1 and 2 are pushed down by hand from above to open the levers 1 and 2 at a predetermined angle against the braking spring 7 of the electromagnetic brake 4, thereby opening the arms 5 and 6. Arm 5,
6 opens, the pressing force of the shoes 8 and 9 against the drum 10 is removed, so that the braking action of the electromagnetic brake 4 is released.

However, in such a conventional manual release device, the operator must apply a large force to push down the connecting portion 3 of the levers 1 and 2, and the operator must continue to press the connecting portion 3. Otherwise, it would be impossible to maintain the levers 1 and 2 at the desired leg opening angle, resulting in a problem of poor operability. In addition, the contact between the open leg ends of the levers 1 and 2 and the arms 5 and 6 is unstable, which poses a safety problem.

In addition, as a reference publicly known example of this type,
-86933 is mentioned.

[Purpose of invention]

An object of the present invention is to provide a manual release device for an electromagnetic brake that is easy to handle, safe, and has a simple configuration.

[Summary of the idea]

A feature of the present invention is that an L-shaped engager that engages with the arm is provided at one end of each lever of the two legs, and the other end of at least one of the levers extends from the connecting portion, and A hook is rotatably provided on one of the levers for holding the leg opening angle of the lever at a predetermined angle and opening the arm of the electromagnetic brake.

With the above configuration, when releasing the electromagnetic brake, all you have to do is engage the L-shaped engager with the arm of the electromagnetic brake, push open the other ends of both levers, and hook the hook on the other lever. In addition, since an L-shaped engaging element is provided at one end of each lever, the engaging element and the arm are tightly engaged when releasing the electromagnetic brake, and do not come off easily, making it easy to handle. As well as being safe,
Since the arm is opened by a lever directly engaged with the arm of the electromagnetic brake, the configuration is simple and the arm can be opened reliably.

[Example of idea]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a perspective view showing an embodiment of a manual release device according to the present invention, and FIG. 2 is a perspective view showing the manual release device attached to an electromagnetic brake.
The electromagnetic brake is the same as shown in FIG.

In FIGS. 1 and 2, manual release device 11
, two levers 12 and 13 having different lengths are connected by a connecting part 14 so that the legs can be opened at any angle. is an engaging element 1 having an L-shaped cross section that can engage arms 5 and 6 of an electromagnetic brake 4, which will be described later.
5 and 16 are fixedly installed. Furthermore, a hook 17 that can be hooked onto the short lever 13 is provided on the protruding end 12a of the long lever 12 that protrudes from the connecting portion 14 to the side opposite to the open end.

The electromagnetic brake 4 is also provided with a pair of arms 5 and 6 that press the shoes 8 and 9 against the drum 10, respectively, and these arms 5 and 6 are normally opened against the braking spring 7 by electromagnetic force. As a result, the braking action is released. Note that 18 is a pressure adjustment nut for the brake spring 7, and 19 is an electromagnetic release device.

When it is desired to manually release the braking operation of the electromagnetic brake 4, each engager 15, 16 of the long and short levers 12, 13 is attached to the arms 5, 6, respectively.
After the levers 12 and 13 are brought into contact and engaged, the protruding end 12a of the long lever 12 is pushed down by hand from above, and the open end sides of the levers 12 and 13 are opened at a predetermined angle against the brake spring 7. Then open the arms 5 and 6. When the arms 5 and 6 open, the pressing force of the shoes 8 and 9 against the drum 10 is removed, so the braking action of the electromagnetic brake 4 is released. By hooking the hook 17 to the short lever 13, the opening angle of both levers 12 and 13 can be kept constant even if the operator does not continue to push the protruding end 12a. That is, by pushing down the protruding end 12a of the long lever 12, the hook 17 can be attached to the short lever 13.
Once the electromagnetic brake 4 is engaged, the electromagnetic brake 4 can be kept open even if no operator is present. Furthermore, since the force required to push down the protruding end 12a is greatly reduced by the lever principle, it is extremely easy to hook and remove the hook 17.

In the above embodiment, a case has been described in which two levers with different lengths are connected in a λ-shape, but the present invention is not limited to this. For example, two levers with the same dimensions are connected in an X-shape. connect to the shape,
The protruding end of each lever may be pushed down from above with both hands.

According to the above embodiment, since at least one of the levers of the two legs is provided with a protruding end protruding from the connecting part, a large pressing force is not required during operation, and a leg holding means such as a hook is provided. This makes it possible to maintain the opening angle of these levers at a constant level even when there is no operator present, thereby significantly improving operability.In addition, each lever is provided with an engager that allows the arm of the electromagnetic brake to Since it is designed to engage reliably with the handle, safety during operation is also ensured.

[Effect of idea]

As explained above, according to the present invention, it is possible to provide an electromagnetic brake manual release device that is easy to handle, safe, and has a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the manual release device according to the present invention, Fig. 2 is a perspective view showing the manual release device shown in Fig. 1 attached to an electromagnetic brake, and Fig. 3 is a perspective view of a conventional manual release device. a perspective view showing the opening device;
FIG. 4 is a perspective view of the electromagnetic brake to which the manual release device shown in FIG. 3 is attached. 4...Electromagnetic brake, 5, 6...Arm, 7...
...Brake spring, 11...Manual release device, 12, 13
... Lever, 12a ... Projection end, 14 ... Connection portion, 15, 16 ... Engagement element, 17 ... Hook (open leg holding means).

Claims (1)

[Scope of utility model registration request] It is equipped with two levers that are connected so that they can be opened at any angle using the connecting part as a fulcrum, and these two levers open the electromagnetic brake arm against the braking spring to release the braking force. In the electromagnetic brake manual release device, an L-shaped engager that engages with the arm is provided at one end of each lever of the two legs, and the other end of at least one of the levers is extended from the connecting portion, Said 2
A manual release device for an electromagnetic brake, characterized in that one of the levers is rotatably provided with a hook that holds the leg opening angle of the leg lever at a predetermined angle and opens the arm of the electromagnetic brake.