Wedge thimble of winding ropes - Type AD

The wedge thimble is designed for the transport-vessel suspension of a more-ropes winding machine and after the loading capacity reanalysis this basic type may also be used for a singlerope winding machine. It is suitable as replacement of the existing thimbles type Schönfeld or Droste, that is why it is manufactured in the size line of these thimbles.

The rope is clutched in the self-locking wedge between the bars and the heart. After the rope setting into the clutch the heart position is assured with female screws and the control bracket is fixed.

The new technical solution under the type marking AD consists in the combination of the design execution of the carrier slot and the side frame hinges of the product that leads to a higher quality of the machinery manufacturing of the product – a more accurate production connected with a steadier distribution of the loading forces to the thimble carrying parts. The individual main parts are stated in the picture: the side frame (1) is the basic carrying part, where the clutching load is transfered on one side via the bar (2) and hinges , and on the other side via the bar (3) with the slot. The bar (4) transfers the carrying force from the hinge pin (9) via hinged bushing (5) on the side frame (1) via the slot as well. The hinges (7) are locked with wedges, the heart (6) is locked with a screw through a disc spring and the bars (3 and 4) are fixed in the side frame with screws bonded with plied saddles – by the other modification the bar (4) is fixed with countersink screws. The rope is conducted out from the thimble by the end clamping (8) with the specified control bracket (10). The heart is shot out

Safety: The product complies to the Public Notice No. 22/1989 Coll. of ČBÚ (Czech Mining Office Board) and especially to the Public Notice No. 415/2003 Coll., § 39.

• Thimble:
• Security as min. 7-tuple than maximum static load specified for more-ropes winding machines  (for utilization by single-rope winding machines with specified safety 10-tuple, it is necessary  to recalculate the basic type load by a coefficient 0,7 or to order a “tailored” thimble);
• Security against the rope removal from the wedge thimble clutch as minimum 1,2-tuple;
• The rope end above the latest bracket as minimum 150 mm;
• Minimum R of the rope bend on the thimble not less than 4-tuple of the rated rope diameter;
• The main parts of the thimble are marked with the identical registration number;
• The thimble carrier parts have a material certificate;
• The thimble is provided with a special surface treatment except of the working parts;
• The thimble is accompanied with the heart drift wedge;
• The thimble is marked with indicator lines (the basic line must be between the lines 1 and  2 on the side frame) and the production label with the data: manufacturer, type, load capacity,  production date, rope and hinge pin diameter, user´s registration number.