Integrated catching device on overtravel brake devices

Abstract

An apparatus for catching a shaft conveyor means (5) in the event of overtravel of a conveyor device, including an overtravel brake device, wherein coupling devices (80,90) are provided for automatic, form-fitting engagement with one another for fixing on the brake device and on the shaft conveyor means (50).

Claims

1. An apparatus for catching a shaft hoisting conveyance in the case of overtravel of the hoisting conveyance, comprising: an overtravel braking device comprising a brake frame; coupling devices configured to provide mutual automatic, form-fitting engagement of the brake frame and a shaft hoisting conveyance, wherein said coupling devices comprise L-shaped levers each having a horizontal bar and a vertical bar and a pivot arranged in said horizontal bar; and brake bands coupled to the brake frame, wherein the brake bands are configured to provide plastic deformation through roller boxes for deceleration of the hoisting conveyance in the event of braking.

2. The apparatus according to claim 1, wherein the coupling devices further comprise: coupling claws on said vertical bars; and holding elements compatible with said coupling claws, wherein said holding elements engage with the coupling claws.

3. The apparatus according to claim 2, wherein the coupling devices are configured as self-opening, pivotally mounted lever elements supplied with a claw projection on an end of said vertical bar opposite said horizontal bar.

4. The apparatus according to claim 3, wherein the coupling claws are biased in a coupling position.

5. The apparatus according to claim 4, wherein spring elements are provided for biasing the coupling claws.

6. The apparatus according to claim 2, wherein at least one of the coupling claws or the holding elements are supplied with shock-absorbing elements.

7. The apparatus according to claim 2, wherein play between the coupling claws and the holding element provides a minimum distance between a supporting surface of the coupling claws and a supporting surface of the holding elements.

8. The apparatus according to claim 1, wherein the mutual contact areas of the coupling devices are supplied with a locking geometry.

9. The overtravel braking apparatus according to claim 1, wherein the coupling devices further comprise: coupling claws on said vertical bars; and holding elements on said shaft hoisting conveyance, said holding elements being compatible with said coupling claws, wherein said holding elements engage with the coupling claws.

10. The overtravel braking apparatus according to claim 9, wherein the coupling devices further comprise a dampening buffer on a contact area of the coupling claws for dampening impingement of the shaft hoisting conveyance on the coupling claws.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further properties, features and advantages of the invention result from the following, purely illustrative and in no way limiting description of a preferred embodiment of the present invention with reference to the attached drawings, which are described as follows:

(2) FIGS. 1a-1d a preferred embodiment of the apparatus for catching a shaft hoisting means;

(3) FIG. 2 a detail view of the apparatus for catching a shaft hoisting means according to FIG. 1a-1d; and

(4) FIG. 3 a further detail view of the apparatus for catching a shaft hoisting means.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) The FIGS. 1a-1d show a preferred embodiment of the apparatus for catching a shaft hoisting means (50), wherein the respective FIGS. 1a, 1b, 1c and 1d show different stages of the hoisting means (50) moving into the apparatus for catching a shaft hoisting means (50).

(6) In the FIGS. 1a to 1d the brake frame (40) of an SSA braking device can be recognized, which comprises also brake bands (60) among other things, by the plastic deformation of which (through roller boxes) the deceleration of the colliding hoisting means (50) takes place in the case of braking. Further, there can be recognized coupling claws (80) attached to the brake frame (40) and holding element (90) on the hoisting means (50), which can interact with the coupling claws (80).

(7) The coupling claws (80), which are configured as L-shaped levers here and the pivot point (82) of which is arranged in the horizontal bar of the lever, are to lock the hoisting means (50) with the SSA brake frame (40) immediately after the hoisting means (50) hits the SSA brake frame (40), thereby reducing the height of the free fall to a minimum. The weight of the hoisting means (50) including the weight of the lower rope (when present) and the energy generated by the free fall in the case of rope breakage or absence of the braking effect of the braking system of the hoisting machine (not shown) is absorbed in the brake bands (60) of the braking device by coupling with the SSA brake frame (40).

(8) The coupling claws (80), as shown in FIG. 1b, are deflected when the hoisting means (50) hits the apparatus and pivot about their pivot point (82) shortly before the running onto the brake frame (40), in the represented example by action of force by the moving hoisting means (50), and open thereby Immediately after the holding elements (90) of the hoisting means (50) have passed the coupling claws (80), the coupling claws (80) close again, either by the action of the own weight of the coupling claws (80) or, as shown in the present example, by the action of springs (70). As shown in FIG. 1c, a play between the coupling claws (80) and the holding element (90) is chosen so large that a minimum distance is present between the supporting surface of the coupling claws (80) and the supporting surface of the holding elements (90).

(9) As can finally be gathered from FIG. 1d, the hoisting means (50) is brought to a standstill by the brake frame (40) in connection with the brake bands (60) and drops into the coupling claws (80), which hold the hoisting means (50), preventing a crash.

(10) FIG. 2 shows a detail view of FIG. 1d in the area of the contact areas of the coupling claws (80) and the holding elements (90), with which the coupling claw (80) engages. As can be recognized, the contact areas in this special embodiment of this detail are beveled or undercut, in order to prevent the coupling claw (80) from sliding off the holding element (90).

(11) FIG. 3 shows a detail view of FIG. 1c, likewise in the area of the contact areas of the coupling claws (80) and the holding elements (90). As can be gathered from FIG. 3 in this regard, a dampening buffer (85) is provided on the contact area of the coupling claw (80), as a measure against a hard impingement of the hoisting means (50) on the coupling claws (80).