Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
  • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B31/00—Hand tools for applying fasteners
  • B25B31/005—Hand tools for applying fasteners for temporarily connecting sheets before or during assembly operations

Definitions

• the present invention relates to a device for fixing fasteners, in particular temporary fasteners of the pinning fastener type.
• Such staples typically comprise:
• At least one clamp intended to pass through the bores and provided with a catching nose that can be applied against a rear face of the structures to be assembled;
• a mechanism movable relative to the body comprising a threaded rod disposed coaxially with the body, one end of the rod being extended by the clamp, the mechanism further comprising a control nut mounted on another end of the rod.
• These staples are generally placed on the sheets using a screwdriver / stripper-type motor apparatus, provided with a laying device comprising:
• the nut moves in translation the threaded rod of the staple, so that the catching nose and the bearing surface of the body respectively apply to the rear and front faces of the stacked sheets.
• a determined tightening torque is generally applied to the staple during its installation.
• the second and third sleeves of the laying device are provided with means for driving / locking in rotation, respectively of the body and the nut of the clip.
• these drive / locking means may be formed by a complementary shape impression.
• the roller cage is typically installed free to rotate in a housing of polygonal section, whose sides cooperate with the rollers during operation of the laying device.
• the present invention aims to solve this problem by providing the laying device with an optimal positioning means of the roller cage.
• the present invention relates to a fastening tool, said tool comprising: a sheath disposed along a main axis, said sheath providing a cylindrical inner housing of polygonal base, developing along the main axis; a roller cage received in said cylindrical housing, said cage comprising: a substantially circular base cylindrical support disposed along the main axis, an external lateral surface of said support being substantially tangential to side faces of the polygonal base cylindrical housing; rollers disposed on the periphery of the support, each roller being rotatable relative to said support along an axis parallel to the main axis; a compression spring exerting on the rollers a radial force towards the main axis; the cage being configured so that each roller is housed at an edge of the cylindrical housing of the sleeve; the support of the cage being able to pivot along the main axis inside said cylindrical housing.
• the laying tool further comprises a return element, connected on the one hand to a roller of the cage and on the other hand to the she
• the return element is a torsion spring.
• tool is understood as a complete laying device, or as a part of said device, such as a drive key of the control nut.
• the tool is intended for the installation of temporary fasteners comprising: a longitudinal body provided with a front face, at least one clamp emerging from said front face, a threaded rod coaxial with the body and movable in translation along said axis, a end of the rod being extended by the clamp, a control nut mounted on another end of the rod.
• Such an installation tool can also be adapted to install a cylindrical outer form of assembly nut, as well as any fastener incorporating such a nut.
• the nut is of circular section and the tool is configured so that the nut can be inserted into the roller cage, an outer lateral surface of the nut then coming into contact shingles.
• the tool is for example a drive key of the nut.
• another element of the tool or of the complete laying device comprises a retaining means in rotation of the longitudinal body.
• the longitudinal body has a circular end of section and the tool is configured so that said end can be inserted into the roller cage, an outer lateral surface of said end then coming to contact of pebbles.
• the tool is for example a front part, or nose, of a screwdriver / unscrewing device.
• another element of the tool or of the complete laying device comprises means for driving the nut in rotation.
• Figure 1 is an axial sectional view of a staple laying device according to one embodiment of the invention.
• Figure 2 an exploded view of a portion of a laying device according to one embodiment of the invention
• Figures 3A and 3B partial cross-sectional views of the device of Figure 1;
• Figure 4 is a partial view, in axial section, of a device for laying a staple according to another embodiment of the invention.
• FIG. 1 represents a schematic sectional view of a device 10 for placing a pinning clip 50.
• the clip 50 comprises a body 51, substantially cylindrical and arranged along an axis 1 January.
• the body 51 is provided with a front face 52 of support, capable of coming into contact with a face of elements to be assembled, such as pierced sheets.
• the clip 50 also comprises two elongate half-pliers 53, each provided with a hooking nose 54 capable of being applied against another face of the sheets to be assembled, through the aligned bores of the sheets.
• the clip 50 further comprises a threaded rod 55 disposed along the axis 1 1 and movable relative to the body 51. One end of the rod is attached to the two half-clips 53. A control nut 57 is mounted on the thread of said rod. Furthermore, a compression spring 58 is disposed around the rod 55 along the axis 1 1, between the nut 57 and an end 59 of the body 51, opposite the bearing face 52.
• the laying device 10 comprises a first cylindrical sheath 12 arranged along the axis 11.
• the first sleeve 12 defines a first internal cavity in which is disposed along the axis 1 1, a second sleeve 13.
• the second sleeve 13 is configured to cooperate with the end 59 to immobilize the body 51 in rotation along the axis 1 January.
• the end 59 has for example a section of hexagonal shape; near an axial opening 20, the second sleeve 13 has an inner wall 14 of complementary shape to this section.
• the second sleeve defines a second internal cavity, in which the end 59 of the body 51 is inserted, while the rest of the body emerges outside the device 10 through the axial opening 20.
• the laying device 10 further comprises a sleeve 15, housed in the second internal cavity.
• the sleeve 15 is movable in rotation and in translation in said second internal cavity, along the axis 1 January.
• the sleeve 15 forms a third internal cavity 17, open at both ends of the sleeve along the axis 1 January.
• a portion of the cavity 17 forms a housing 18, whose side wall is cylindrical polygonal base, developing along the axis 1 January.
• the housing 18 has for example a twelve-sided lateral surface, that is to say a section forming a regular dodecagon.
• the housing 18 receives a roll cage 19, the operation of which will be detailed below.
• An end 21 of the cavity 17 receives a drive shaft 22 intended to be connected to an output shaft of a screwing / unscrewing device.
• the sleeve 15 is movable in translation along the axis 1 1 relative to the shaft 22, which is fixed in translation relative to the first sleeve 12.
• a compression spring 23, housed in the end 21 of the cavity 17 and pressed against the shaft 22, tends to bring the sleeve 15 towards the opening 20.
• the shaft 22 can rotate the sleeve 1 5, along the axis 1 1, by means of a pin 24.
• Figure 2 shows an exploded view of a sleeve 1 analogous to the sleeve 1 5 of Figure 1.
• the reference numbers are kept in relation to Figure 1.
• the sleeve 1 5, or drive key comprises a sheath 1 6 disposed along a main axis 1 1, said sheath providing an internal cavity.
• a portion of said internal cavity forms a housing 18, cylindrical polygonal base, developing along the axis 1 January.
• the polygonal base is for example a regular dodecagon.
• the cylindrical housing 1 8 receives a cage 19 with rollers.
• Said cage is formed of a ring 30 and an elastic ring 31, arranged along the axis 1 1 and connected by spacers 32.
• the ring 30, the ring 31 and the spacers 32 form a basic cylindrical support 33 substantially circular.
• the support 33 is configured so that the spacers 32 are substantially tangent to side faces 26 of the housing 18.
• the cage 1 9 further comprises rollers 34 disposed on the periphery of the support 33, between the spacers 32. Each roller 34 is rotatable relative to the support 33 along an axis 35 parallel to the main axis January 1. In the example of Figure 2, the rollers 34 are distributed on six axes 35, arranged around the axis 1 1 according to a regular hexagon.
• the cage 1 9 comprises a compression spring 36 disposed around the spacers and rollers.
• the spring 36 exerts on the rollers 34 a radial force towards the axis 1 January.
• FIGS. 3A and 3B show cross-sectional views of the drive key 15 into which the staple 50 is inserted.
• the cutting plane passes through the roller cage 1 9 and the nut 57.
• FIG. 3A shows the drive key 1 5 in a configuration before screwing / unscrewing, allowing a correct installation of the staple 50.
• a detailed view of a roller 34 is shown.
• each of the rollers 34 is opposite an edge 27 delimiting two lateral panels 26 of the housing 1 8. More precisely, each axis 35 of rotation of a roller is included in a passing plane. by the main axis 1 1 and by a ridge 27.
• the housing 18 comprising twelve sections 26 and twelve edges 27, one edge in two is opposite a roller 34. There is a clearance 40 between each roller 34 and the edge 27 vis-à-vis. This configuration of the cage 19 allows the drive key 15 to exert on the nut 57 an optimal effort during screwing.
• FIG. 3B shows the drive key 15 in another configuration before screwing / unscrewing, this configuration being unfavorable to the correct installation of the clip 50.
• the rollers 34 are offset with respect to the edges 27. Each roller 34 is in contact with a single pan 26 of the housing 1 8, without play.
• the roller cage is free to rotate along the main axis in the housing of polygonal section. It is therefore possible that the cage is in the configuration of Figure 3B when inserting a control nut.
• Such a configuration induces excessive forces during the installation of the staple 50.
• the drive of the rotating nut is defective.
• the nut 57 may be damaged by the friction of the rollers 34.
• the present invention therefore includes a means of returning the rollers to the position of FIG. 3A before any temporary attachment is inserted into the roller cage.
• this means is embodied by a torsion spring 37.
• the spring 37 has the shape of a wire wound along the axis 1 January.
• a first end 38 of the spring 37 is connected to a roller 34 of the cage 1 9.
• a second end 39 of the spring 37 is connected to the sheath 1 6.
• the end 39 is for example housed in a radial notch (not shown) formed on an inner surface of the sheath.
• the spring 37 tends to place the rollers 34 of the cage 1 9 in the configuration shown in Figure 3A, said rollers being opposite an edge 27.
• FIG. 4 represents a detailed view of an alternative embodiment of the invention. More specifically, FIG. 4 shows a detailed view of a clip 50 'similar to the clip 50 shown in FIG. 1, inserted into a laying device 10' similar to the device 1 0 of FIG. 1. The references of the elements common with those of FIG. 1 are preserved hereinafter.
• a difference between the staple 50 'and the staple 50 of FIG. 1 is in the form of a control nut 57', similar to the nut 57. More specifically, the nut 57 'has a hexagonal section and not circular.
• the nut 57 ' is housed in a sleeve 1 5' similar to the sleeve 1 5. More specifically, the sleeve 1 5 'comprises a housing 1 8' whose shape is complementary to that of the nut 57 .
• the housing 18 'thus has a cylindrical shape of hexagonal base. During the rotation of the sleeve 1 5 ', the surface of the housing 1 8' directly cooperates with the nut 57 'to drive it in rotation.
• Another difference between the staple 50 'and the staple 50 is the shape of an end 59' of the body 51.
• the end 59 ' has a circular section, unlike the hexagonal shape of the end 59 of Figure 1.
• a second sleeve 1 3 'of the device 1 0' cooperates with the end 59 'to immobilize the body 51 in rotation along the axis 1 January.
• the second sleeve 13 ' Near an axial opening, the second sleeve 13 'has an internal housing 14', of the same shape as the housing 18 of Figures 1 and 2.
• the other elements of the device 10 'and the staple 50' are identical to those of the device 10 and the staple 50 shown in FIG.
• the cage 19 of Figure 4 includes a spring 37 identical to that described above, said spring ensuring the return of the cage 19 in its optimal configuration at the end of the installation of the staple 50 '.
• biasing element of the invention has been described in the examples as being formed by a torsion spring, it will be understood that this example is not restrictive. Any equivalent means for bringing the rollers of the cage opposite the edges of the cylindrical housing of the sheath is included in the invention.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Portable Nailing Machines And Staplers (AREA)
• Dowels (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
• Surgical Instruments (AREA)
• Transmission Devices (AREA)
• Mounting Of Bearings Or Others (AREA)
• Clamps And Clips (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=49111371

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (7)

Family Cites Families (13)

• 2013
  • 2013-05-22 FR FR1354604A patent/FR3005886B1/fr not_active Expired - Fee Related
• 2014
  • 2014-05-20 ES ES14725175.5T patent/ES2627605T3/es active Active
  • 2014-05-20 JP JP2016514376A patent/JP6267325B2/ja active Active
  • 2014-05-20 EP EP14725175.5A patent/EP2999571B1/de active Active
  • 2014-05-20 BR BR112015029151-1A patent/BR112015029151B1/pt active IP Right Grant
  • 2014-05-20 US US14/891,442 patent/US10118280B2/en active Active
  • 2014-05-20 CN CN201480029351.3A patent/CN105392598B/zh active Active
  • 2014-05-20 WO PCT/EP2014/060337 patent/WO2014187821A1/fr active Application Filing

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