SU400524A1 - DEVICE FOR MONITORING THE CABLE TENSION - Google Patents

Description

one

The invention concerns the tension control technology of lifting cables for lifting mechanisms and is intended for use, in particular, in the mechanisms of drive of the lifting gates of a building for industrial purposes, such as workshops of machine-building enterprises.

Known devices for controlling the tension of the cable, including a spring-loaded pusher, interacting at one end with a limit switch included in the electrical control circuit of the gate.

The purpose of the invention is to increase reliable operation of the device. This is achieved by the fact that the opposite end of the spring-loaded pusher is designed in the form of a plug with a rolling roller abutting the cable.

iia FIG. Figure 1 shows schematically a device for controlling the tension of a cable, a longitudinal section; in fig. 2 - pillar doors with a device installed to control the tension of the cable, general view.

On the frame of the sliding gates built into the building casing, the bar 1 is rigidly fixed, on which bushing-2 and limit switch 3 are mounted. A bushing pusher 4 is installed in the bushing guide, the front end of which is made in the bushing 5 and is provided with rolling po2

6, interacting with the cable 7 lifting .ma gate. The rear end of the pusher communicates with the limit switch 3 included in the electrical control circuit of the gate.

The proposed device for controlling the tension of the cable works as follows.

When the cable 7 is tensioned (sfm fn. 2), the pusher 4 overcomes the force of the spring 8, moves in the sleeve guide and the rear end acts on the limit switch 3. The contacts of the switch are closed and the power is supplied to the gate lifting mechanism 9.

When the cable is weakened or broken, the force acting on the rolling roller is reduced. Under the action of the spring 8, the pusher moves in the opposite direction and frees the key switch. The switch is activated and turns off the drive lift. I gate.

Eliminating the cause of the weakening of the cable (misalignment of the door curtain and jamming them in the guides 10, actuation of catchers 11, hitting foreign objects under the gate, etc.), manually move the pusher 4 until the end switch 3 triggers and 3

However, depending on the desired direction of the gate movement up or down, the corresponding button of the drive station for the gate lift is pressed. In this case, the gate is raised until the operation of the limit switch 12 is triggered or is lowered until the operation of the limit switch 13 trips, which limits the position of the gate, respectively, in the upper and lower positions. Limit switches 12 and 13 disable the drive for lifting the gate.

The subject of the invention is a device for controlling the tension of a cable, also an ipier, in an erected gate, including a spring-loaded pusher, which interacts with P1, one end with an end switch included in the electrical circuit; 1 switch that differs in that The opposite end of the joint pusher is made in the form of a plug with a rolling roller abutting the cable.