Patent Number: 052271250
Section: claims

1. Tool for handling a cluster of rods of consumable poison, said tool comprising a head for gripping the cluster, connected to the end of a handling member displaceable slidably in a tool body between an active position in which the head and at least part of the member project from the body, and a retracted position in which the gripping head, the handling member and at least part of the cluster extend within the body, and combs for guiding the rods, provided at the corresponding end of the body and displaceable by raising between a retracted position in which said combs extend substantially along the wall of the body, and an active position in which said combs extend substantially perpendicularly to said wall, in order to guide the rods, wherein said tool comprises elastic means for stressing said combs into active position and means for retracting said combs counter to the stress of said elastic means, displaceable between an active position of retraction of said combs and a retracted position of release of said combs by said gripping head and/or said handling member during displacement between their active position and their position retracted within said body. 2. Handling tool according to claim 1, wherein said elastic means are connected at one end to an arm for operating said combs and at another end to said body. 3. Handling tool according to claim 1, wherein said retraction means comprise a sleeve having, at a first end of said sleeve, drive and guide means cooperating with said gripping head and/or said handling member and complementary guide means integral with said body during the displacement of said gripping head and/or handling member in said body and, at a second end of said sleeve, stop surfaces designed to cooperate with said combs in order to displace said combs towards their retracted position. 4. Handling tool according to claim 3, in which said combs are arranged at 90.degree. relative to one another on said tool body, and in which said sleeve has stop surfaces at 90.degree. relative to one another with leading edges which are offset axially so as to bring about successive displacements of said combs at 90.degree.. 5. Handling tool according to claim 4, comprising contact rollers at each end of said stop surfaces in order to facilitate relative displacement of said stop surfaces in relation to said combs. 6. Handling tool according to claim 3, wherein said drive and guide means comprise a supporting ring carrying rollers cooperating with guide runways of said body. 7. Handling tool according to claim 6, wherein one of said rollers is carried by a supporting structure radially displaceable in relation to said handling member in said supporting ring, in order to follow a guide runway on two levels, between a retracted position and an active attachment position, and wherein an attachment stud of the supporting structure engages into a recess of said handling member in order to attach said retraction means to said handling member. 8. Handling tool according to any one of claims 1 to 7, wherein said retraction means comprise a counterweight. 9. Handling tool according to any one of claims 1 to 7, wherein said tool body comprises a ring on which bear the ends of said stop surfaces of said retraction means in active position.