Hook block base body

Abstract

The invention relates to a hook block base body for fastening to a pulley set of a hoisting apparatus having a plurality of deflection pulleys comprising a means for installing the hook block base body at the pulley set and a load suspension means for suspending a load, characterized by at least one projection element that is configured to cooperate with a deflection pulley on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope-free.

Claims

1. A hook block base body for fastening to a pulley set of a hoisting apparatus having a plurality of deflection pulleys comprising: a means for installing the hook block base body to the pulley set; a load suspension means for suspending a load; and at least one projection element that is configured to cooperate with a deflection pulley of the plurality of deflection pulleys on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope-free.

2. The hook block base body in accordance with claim 1, wherein the means for installing the hook block base body at the pulley set is a recess that is usable for the installation at the pulley set via a pin connection.

3. The hook block base body in accordance with claim 1, wherein the load suspension means is a hook or a gripper.

4. The hook block base body in accordance with claim 1, wherein the at least one projection element is configured to engage into a peripheral groove for guiding a hoist rope of the deflection pulley in a state of the hook block base body installed at the pulley set, with an installation of the hook block base body with the pulley set only being possible when the deflection pulley is not reeved.

5. The hook block base body in accordance with claim 4, wherein the at least one projection element for engaging into the peripheral groove of a deflection pulley serves to ensure that the hook block base body only cooperates with a reeving of the pulley set matching it.

6. The hook block base body in accordance with claim 1, wherein each projection element is configured to cooperate with a deflection pulley of the pulley set that is not a center pair of deflection pulleys or a center deflection pulley of the pulley set.

7. A hook block comprising: a pulley set of a hoisting apparatus including a plurality of deflection pulleys; and a hook block base body for fastening to the pulley set, the hook block base body comprising: a recess for installing the hook block base body to the pulley set; a load suspender for suspending a load; and at least one projection element that is configured to cooperate with a deflection pulley of the plurality of deflection pulleys on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope free.

8. The hook block in accordance with claim 7, further comprising a hook block weight that is fastened to the hook block base body or to the pulley set.

9. The hook block in accordance with claim 7, wherein the at least one projection element of the hook block base body is configured to ensure that the reeving of the pulley set corresponding to the hook block base body is present on an installation.

10. A crane comprising: a hook block base body for fastening to a pulley set, the hook block base body comprising: a recess for installing the hook block base body to the pulley set; a load suspender for suspending a load; and at least one projection element that is configured to cooperate with a deflection pulley of the plurality of deflection pulleys on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope free.

11. The hook block in accordance with claim 7, wherein the recess is usable for the installation at the pulley set via a pin connection.

12. The hook block in accordance with claim 7, wherein the load suspender is a hook or a gripper.

13. The hook block in accordance with claim 7, wherein each projection element is configured to cooperate with a deflection pulley of the pulley set that is not a center pair of deflection pulleys or a center deflection pulley of the pulley set.

14. The hook block in accordance with claim 7, wherein the at least one projection element is configured to engage into a peripheral groove for guiding a hoist rope of the deflection pulley in a state of the hook block base body installed at the pulley set, with an installation of the hook block base body with the pulley set only being possible when the deflection pulley is not reeved.

15. The crane in accordance with claim 10, further comprising the pulley set.

16. The crane in accordance with claim 10, further comprising a hook block weight that is fastened to the hook block base body or to the pulley set.

17. The crane in accordance with claim 10, wherein the at least one projection element of the hook block base body is configured to ensure that the reeving of the pulley set corresponding to the hook block base body is present on an installation.

18. The crane in accordance with claim 10, wherein the recess is usable for the installation at the pulley set via a pin connection.

19. The crane in accordance with claim 10, wherein the load suspender is a hook or a gripper.

20. The crane in accordance with claim 10, wherein each projection element is configured to cooperate with a deflection pulley of the pulley set that is not a center pair of deflection pulleys or a center deflection pulley of the pulley set.

Description

[0024] Further features, details and advantages of the present invention will become clear with reference to the following description of the Figures. There are shown:

[0025] FIG. 1: a schematic representation of a hook block comprising a pulley set and a hook block base body in accordance with the prior art; and

[0026] FIG. 2: a schematic representation of a hook block in accordance with the invention.

[0027] FIG. 1 shows a strong hook block 100 that is configured for hoisting a heavy load. The hook block 100 here has a large lifting hook 51, a hook block base body 11 and a pulley set 3 that has a plurality of deflection pulleys 2. It can be recognized here that the hoist rope 9 runs over each of the plurality of deflection pulleys 2, that is, it is reeved in every deflection pulley 2. It can additionally be recognized that the pulley set 3 is separable from the hook block base body 11 with the aid of the pins 7. Provision can furthermore be made that hook block weights (not shown) are attached to the pulley set 3 or to the hook block base body 11.

[0028] FIG. 2 now shows a schematic representation of the hook block 10 in accordance with the invention that has a hook block base body 1 in accordance with the invention. If, for example, a user endeavors to replace the strong hook block 100 previously described in FIG. 1 to raise heavy loads with a weak hook block 10 (as shown in FIG. 2) to hoist less heavy loads, this also brings about a change of the reeving for the optimization of the work speed. The changed reeving is also of great importance with respect to a possible overload of the weak hook block 10 so that an operation with a reeving coordinated with the hook block base body 1 is of great importance.

[0029] The number of strands n =7 used in FIG. 1 is thus reduced to the number of strands n=3 with the weak hook block 10. It is thus clear that a new reeving has to be carried out. The payload of the lifting hook 5 and the number of strands is only coordinated with one another in this way.

[0030] As can be seen from FIG. 2, the hoist rope 9 is guided over the center deflection pulley 2. The number of strands accordingly amounts to n=3. On the connection of the base body 1 to the pulley set 3, the projections 6 approach the deflection pulleys 2 and engage in the peripheral groove 8 of the deflection pulleys 2. It is a requirement for a complete connection between the pulley set 3 and the hook block base body 1 that the projections 6 and the deflection pulleys 2 are so close to one another that there is no longer any room for a hoist rope 9 between the projection elements 6 and the deflection pulleys 2. A connection of the pulley set 3 and the hook block base body 1 can accordingly only take place when the corresponding reeving for the hook block base body 1 has been carried out at the pulley set 3. If this is not the case, the projection elements 6 provide that the recess 4 of the hook block base body 1 cannot be aligned flush with the corresponding recess at the pulley set 3 so that the pin connection 7 cannot be used successfully.

[0031] On a conversion to a configuration shown in FIG. 2 it is accordingly always ensured that the new reduced reeving takes place at the pulley set since otherwise the connection of the two hook block components cannot be carried out.