Connection device for assembling together two members

1. A connection device for assembling together a receiver first section member presenting an inner cavity, and a fastener second section member presenting at least one groove having a constricted opening, the connection device configured to be received in stationary manner in the inner cavity of the receiver member, the connection device including a cage having two branches forming a pair of jaws for coming into engagement in the groove of the fastener member through a constricted opening, the device comprising:

resilient drive means for urging a spacer member between the jaws so as to space the jaws apart in such a manner as to come into engagement with the groove through the constricted opening; and

a pivotable lever that pivots about a pivot pin, the pivotable lever comprising a lever arm that is accessible and configured to be gripped manually, and a thrust head that comes into engagement with the spacer member so as to move the space member out from the jaws against the force exerted by the resilient drive means on the spacer member.

2. A connection device according to claim 1 , wherein the thrust head is out of contact with the spacer member when the jaws are engaged in the groove, such that the spacer member is urged between the jaws only by the resilient drive means.

3. A connection device according to claim 1 , wherein the thrust head includes a contact zone that is suitable for coming into engagement both with the spacer member when the lever arm is at a distance from the cage, and with a branch of the cage when the lever arm is folded down on the cage, the branch of the cage advantageously being flexible so as to be deformed by the contact zone of the thrust head.

4. A connection device according to claim 1 , wherein the spacer member, advantageously made as a single piece, comprises a front portion forming a spacer flange that comes into engagement between the jaws, a rear portion in engagement with resilient drive means, and a central portion forming a window in which the thrust head moves so as to come into engagement with the rear portion and/or the branch.

5. A connection device according to claim 1 , wherein the cage includes a bearing groove for ends of the pivot pin of the pivotable lever.

6. A connection device according to claim 1 , wherein the spacer member includes a spacer blade that comes into engagement with converging surfaces of the jaws so as to space them apart progressively until they come into clamping engagement with the constricted opening of the groove of the fastener member.

7. A connection device according to claim 1 , wherein the cage includes an open housing for receiving a blocking pin making it possible to fasten the device in the cavity of the receiver member, the blocking pin advantageously passing through the two branches and the spacer member, the blocking pin advantageously being urged by a spring so as to project out from one of the branches.

8. A receiver section member presenting an inner cavity containing a connection device according to claim 1 , the receiver member including a cutout presenting a continuous annular edge in which the lever arm is arranged.

9. A receiver section member according to claim 8 , wherein the cutout is generally elongate, but forms an end extension presenting a small width defining two opposite bearing edges below which ends of the pivot pin of the pivotable lever are engaged.

10. A method of assembling a connection device in a receiver section member according to claim 8 , the method comprising the following successive steps:

a—removing the pivotable lever and the pivot pin from the cage;

b—engaging the cage in the cavity of the receiver member;

c—putting the pivotable lever into place with the pivot pin in the cage through the cutout;

d—moving the assembled connection device in the cavity so as to engage ends of the pivot pin below the edges of the cutout; and

e—blocking the cage in the cavity of the receiver member.

11. A method of assembling a connection device in a receiver section member, comprising the following successive steps:

providing the connection device for assembling together a receiver first section member presenting an inner cavity, and a fastener second section member presenting a groove having a constricted opening, the connection device configured to be received in stationary manner in the inner cavity of the receiver member, the connection device including a cage having two branches forming a pair of jaws for coming into engagement in the groove of the fastener member through a constricted opening, the connection device further comprising:

a resilient drive member for urging a spacer member between the jaws so as to space the jaws apart in such a manner as to come into engagement with the groove through the constricted opening; and

a pivotable lever that pivots about a pivot pin, the pivotable lever comprising a lever arm that is accessible and configured to be gripped manually, and a thrust head that comes into engagement with the spacer member so as to move the space member out from the jaws against the force exerted by the resilient drive member on the spacer member; and

the receiver member including a cutout presenting a continuous annular edge in which the lever arm is arranged;

removing the pivotable lever and the pivot pin from the cage;

engaging the cage in the cavity of the receiver member;

putting the pivotable lever into place with the pivot pin in the cage through the cutout;

moving the assembled connection device in the cavity so as to engage ends of the pivot pin below the edges of the cutout; and

blocking the cage in the cavity of the receiver member.

12. A connection device for assembling together a receiver first section member presenting an inner cavity, and a fastener second section member presenting a groove having a constricted opening, the connection device configured to be received in stationary manner in the inner cavity of the receiver member; the connection device comprising:

a cage having two branches forming a pair of jaws for coming into engagement in the groove of the fastener member through a constricted opening;

a spring that urges a spacer member between the jaws so as to space the jaws apart in such a manner as to come into engagement with the groove through the constricted opening; and

a pivotable lever that pivots about a pivot pin, the pivotable lever comprising a lever arm that is manually accessible and configured to be manually gripped and operated to move a thrust head into engagement with the spacer member so as to move the space member out from the jaws against the force exerted by the spring on the spacer member.