GR1010279B - Speed regulator's security mechanism - Google Patents

Abstract

The invention relates to a new speed ??regulator’s safety mechanism (Figure1, 2) which mechanism is an arrangement of metal and electrical accessories. The incorporation of the safety mechanism (Figure 1) to the speed regulator (Figure 2) provides maximum safety as to the speed regulator’s actuation point (Figure 2). The arrangement activates and retains the accessory (6) (Figure 4) in engagement with the friction pulley (7) of the speed regulator (Figure 4). The immobilization of the friction pulley (7) activates the mechanism of the grip of the elevator through inertia. The immobilization of the friction pulley (7) is done in parallel by activating the engagement accessory (6) and the safety mechanism (Figure 1) of the speed regulator (Figure 3.4). Likewise, the safety mechanism (Figure 1) of the speed regulator (Figure 4) interrupts , while activating, the elevator’s safety electric circuit via an open contact (5).

Description

Patent description

Title : Elevator speed governor safety mechanism

The invention refers to the integration of a safety mechanism (figure 1) in the elevator speed controller (figure 2), (figure 5) with new features which maximize the safety of the speed controller (figure 3), (figure 4) of the elevator when activating the .

Speed regulator (figure 2), (figure 5) defines the safety system that is activated in case the elevator develops 15% higher than its nominal speed. The activation of the speed regulator is due to centrifugal force FK (14), (figure 2). Actuation of the speed governor in turn activates the grapple mechanism or otherwise the elevator's emergency brakes. The grapple mechanism is activated in the event of a free fall of the elevator cabin to immobilize it instantly.

The speed governors (figure 2), (figure 5) for elevators until now are actuated by the engagement part (6) on the pulley (7) of the speed governor and sometimes by auxiliary means (figure 1). During the activation process there is a case for some types of regulators (figure 2), (figure 5) not to engage immediately. This is due to the fact that the engagement part (6) hits the edge of the socket (13) (fig. 2), (fig. 5) of the pulley (7) with the consequence that the activation speed is reduced and additional time is needed for the complete activation of the speed controller (figure 2), (figure 5). An important point is that by activating the speed regulator (figure 2), (figure 5) the safety circuit is interrupted through a closed contact N/C (15), (figure 5) or an open contact N/O (figure 2) or which electrically immobilizes the elevator when the engagement part - cock (6) enters the slot (16) of the pulley (7) of the speed regulator (figure 2), (figure 5) . The closed N/C contact (15), (figure 5) breaks the electrical circuit and remains in this state by means of a ratchet or otherwise, a permanent hold while the open N/O contact (5) when open breaks the electrical circuit.

The new elevator speed governor safety mechanism (figure 1) is activated in parallel with the normal process of activating a speed governor (figure 2) (figure 5). When the safety mechanism (fig. 1), (fig. 4) is actuated the engagement part - cock (6) remains locked inside the slot (16) of the pulley (7), (fig. 4). Therefore with the safety mechanism (fig. 1) the activation of the engagement is more direct and there is no possibility for the engaging part-cock (6) to leave the slot (16) of the pulley (7) of the speed regulator (fig. 4). An important point of the mechanism is that the electrical contact (5) that immobilizes the elevator and interrupts the electrical circuit is made with an open N/O contact (5). Therefore there is no need for a ratchet or otherwise, a permanent hold on the electrical switch.

The speed controller returns to normal operation (figure 3) only after the intervention of a qualified technician and in no case by inadvertent action.

The new speed regulator safety mechanism (figure 1) is integrated into the base (9) of the speed regulator (figure 2), (figure 3). The speed governor safety mechanism assembly consists of metal and electrical components (figure 1).

In particular, it consists of:

1. Metal element with holes (1) in a horizontal position for the actuation of the pin (10) on the wheel (11) which causes the centrifugal force FK (14) (figure 2) and the actuation of the engagement part (6) and the switch ( 5) for the electrical interruption of the elevator 2. Metal element with holes (2) located at an angle and connected by means of a safety device (4) to the metal element in a horizontal position (1).

3. Spring (3) (figure 4) which pulls the metal element in a horizontal position (1), so that when the release (4) is made and disengagement from the metal element (2) which is at an angle, it exerts a sufficient force figure (2) ) F (8) to hold the engagement part (6) firmly in the slot (16) of the pulley (7).

4. Electric switch (5) which when the speed regulator (figure 3) is in normal operation is in the open contact position (N/O) and when the speed regulator is activated it breaks the electrical circuit

5. Suitable screws (12) and nuts used to support or rotate the components of the safety mechanism figure (1).

Claims (5)

Claims 1. The new elevator speed governor safety mechanism (figure 1) works as an additional, primary and auxiliary device for activating the elevator speed governor (figure 3). This assembly activates and holds the speed governor engagement cock (6) (figure 4) in engagement with the socket (16) on the speed governor friction pulley (7) (figure 4). Then the immobilization of the friction pulley (7) activates the elevator car grab or otherwise the emergency brakes against free fall of the car, through inertia. The activation of the speed governor safety mechanism (fig. 3), (fig. 4) is carried out by the component forces F1,F2 (8) of the force F (8) applied to the angled lever (2) of the new mechanism (fig. 1) ( figure 2). FI vertical force F(8) comes from the centrifugal force FK (14) (figure 2) which develops on the wheel (11) due to the normal operation of the speed regulator. FI action of the components of forces (8) FI, F2, (diagram 2) exerted on the lever (2) are capable of disabling the fuse (4) (diagram 3), (diagram 2) which holds the lever (1) of the regulator speed (figure 3) in normal operation position (figure 3). The spring (3) (figure 1), (figure 4) pulls the lever (1). When the speed governor develops the required actuation speed the speed governor safety mechanism is activated because the lever (1) pushes and locks the engagement part (6) in the socket (16) on the friction pulley (7) by means of the pin (10). FI immobilization of the friction pulley (7) is done simultaneously through the activation of the engagement part (6) and the safety mechanism (figure 1) of the speed regulator (figure 3), (figure 4). Also, the safety mechanism (figure 1) of the speed regulator (figure 4), when activated, interrupts the electrical safety circuit of the elevator through an open contact (5). The elevator speed controller (figure 3) returns to normal operation (figure 3) only after the intervention of a qualified technician. 2. The new speed regulator safety mechanism (1) according to claim 1, characterized in that it can be manufactured with different fixing, support and rotation centers. 3. The new speed governor safety mechanism (1) according to claim 1,2 can be made with components of various dimensions and materials. 4. The novel speed governor safety mechanism (1) according to claim 1,2,3 can interrupt the safety circuit and means a closed N/C contact 5. The new speed governor safety mechanism (1) according to claim 1, 2, 3, 4 can transmit an activation signal to the control and a warning signal to the responsible technician.