• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a fastener (110) for the temporary assembly of at least two previously drilled structures (112), comprising: - a hollow body (122) comprising a bearing face (40); - Elastic clamps (24) movable relative to the body and projecting relative to the bearing face; - a spacer (26) around which are arranged the elastic clamps; a movable connecting element (130) extending inside the body and integral with the elastic clamps (24); and - an actuating element (132) connected to the connecting element by a thread / tapping (67, 84). The connecting element is traversed by a lateral orifice (70) elongated axially between two ends (72, 74) closed; and the attachment further comprises a transverse stop (28) integral with the spacer, said stop being able to slide between the axial ends of said lateral orifice.
    公开号:FR3080155A1
    申请号:FR1853326
    申请日:2018-04-17
    公开日:2019-10-18
    发明作者:Julien Brachet
    申请人:LISI Aerospace SAS；
    IPC主号:
    专利说明:

    Temporary fixing of structures
    The present invention relates to a fastening for the temporary assembly of at least two previously drilled structures, of the type comprising: a hollow body, extending along a main axis, a first end of said body comprising a bearing face substantially perpendicular to said main axis; a plurality of elastic clamps movable relative to the body and extending substantially parallel to the main axis, a first end of each elastic clamp comprising a hooking beak, said hooking beaks projecting from the face of body support; a spacer extending along the main axis, a first end of said spacer projecting from the bearing face of the body, the plurality of elastic clips being disposed around said first end, a second end of said spacer being disposed inside the body; a connecting element movable relative to the body and extending along the main axis inside said body, a first end of said connecting element being secured to a second end of each elastic clamp; andan actuating element connected to a second end of the connecting element by a thread / tapping type mechanism.
    The invention is particularly applicable to temporary fasteners such as pin clips.
    In the aeronautical industry, before carrying out the final assembly of two structural elements, it is known to carry out a provisional assembly of said elements by means of temporary fasteners inserted in through holes. Such temporary fixings are described in particular in document EP0336808.
    In similar devices, it is known to connect the hollow body and the elastic clamps by means of an assembly piece passing between said clamps. Such an assembly part having in particular the function of blocking the clamps in rotation relative to the body, its thickness leads to increasing the space between the clamps, therefore to limiting the thickness of said clamps.
    The document EP0336808 describes in particular a temporary fixing comprising two elastic clamps. However, it is advantageous to increase the number of elastic clamps in order to increase the grip surface with the structures to be assembled.
    The object of the present invention is to propose a connection mechanism between the hollow body and the elastic clamps making it possible to maintain a maximum thickness of said clamps, in particular in order to provide for a number of clamps greater than two.
    To this end, the subject of the invention is a fixing of the aforementioned type, in which the connecting element is crossed by a lateral orifice substantially disposed in a transverse direction perpendicular to the main axis, said lateral orifice extending axially between first and second closed ends; the attachment further comprises a stop extending in the transverse direction and integral with the spacer, said stop being disposed in the lateral orifice of the connecting element, so as to slide between the first and second axial ends of said orifice lateral.
    According to other advantageous aspects of the invention, the binding comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
    - The binding also comprises a compression spring arranged inside the body around the connecting element, said spring being able to compress along the main axis, one end of said spring being able to come into contact with the abutment on either side of said connecting element;
    - The second end of the connecting element comprises a thread and the actuating element comprises a thread cooperating with said thread;
    - The second end of the spacer is crossed by a transverse hole arranged in the transverse direction, and the stop is a pin assembled to said transverse hole;
    - The plurality of elastic clamps comprises at least three elastic clamps and preferably at least four elastic clamps;
    - the stop is fixed in translation along the main axis relative to the body;
    - The binding further comprises a sleeve disposed inside the body around the connecting element, said sleeve being fixed relative to the body, a first end of said sleeve comprising two notches extending axially and located opposite -vis from each other with respect to the main axis, the stop passing through said notches and being able to slide in said notches along the main axis;
    - the compression spring is arranged around the sleeve;
    - a first end of the actuating element is arranged inside the body and a second end of said actuating element protrudes from a second end of said body;
    - the second end of the actuating element comprises a coupling element with a rotary installation tool; and
    - The second end of the actuating element further comprises a flange forming an external radial projection.
    The invention also relates to a laying nose for assembling a fixing with at least two previously drilled structures, said fixing being as previously described and comprising the flange, said laying nose comprising: a locking device in rotation of the body; a rotary installation tool comprising means for coupling with the coupling element of the second end of the actuating element, so as to rotate said actuating element; and an elastic interlocking device on the flange so as to axially maintain the attachment assembled to said fitting nose.
    The invention further relates to an assembly comprising: structures to be assembled, comprising first and second opposite faces, as well as a bore opening on each of said first and second faces; and a fixing as described above, the plurality of elastic clamps being disposed in the bore, the bearing face of the body and the hooking nozzles coming into contact respectively with the first face and the second face, the spring exerting a tension tending to bring said bearing face and said hooking nozzles along the main axis.
    The invention will be better understood on reading the description which follows, given by way of nonlimiting example and made with reference to the drawings in which:
    - Figure 1 is a perspective view of a binding according to a first embodiment of the invention, in a first configuration;
    - Figure 2 is a sectional view of the fixing of Figure 1, in the first configuration;
    - Figure 3 is a sectional view of an assembly comprising the fastener of Figure 1, in a second configuration;
    - Figure 4 is a perspective view of elements taken in isolation from the fixing of Figure 1, in a third configuration;
    - Figure 5 is a perspective view of a binding according to a second embodiment of the invention, in a first configuration;
    - Figure 6 is a sectional view of the binding of Figure 5, in the first configuration;
    - Figure 7 is a sectional view of an assembly comprising the fixing of Figure 5, in a second configuration;
    - Figure 8 is an exploded perspective view of elements taken in isolation from the fixing of Figure 5, in said second configuration; and
    - Figure 9 is a sectional view of an assembly comprising the attachment of Figures 1 to 3 and a fitting nose according to an embodiment of the invention.
    Figures 1-3 and 5-7 respectively show a binding 10 according to a first embodiment of the invention and a binding 110 according to a second embodiment of the invention. FIG. 9 shows an assembly 200 comprising the attachment 10 of FIGS. 1-3 and a fitting nose 202 for the installation of said attachment 10.
    In the following description, the fasteners 10 and 110 will be described simultaneously, the similar elements of the two fasteners being designated by the same reference numbers.
    The binding 10, 110 is capable of temporarily assembling at least two structures 12, 112, visible in FIGS. 3 and 7, to form an assembly 13, 113. For the sake of simplification, the structures 12, 112 are shown in a single piece, defining two opposite faces 14, 16. A bore 18 passes through the structures 12, 112 from the first 14 to the second 16 face.
    As will be specified below, the structures 12 in FIG. 3 form a thickness P min corresponding to the minimum thickness of the structures that can be assembled by the fastener 10. On the contrary, the structures 112 in FIG. 7 form a thickness P max corresponding to the maximum thickness of the structures that can be assembled by the fastener 110. The thickness corresponds to the distance between the first 14 and second 16 faces.
    The binding 10, 110 extends along a main axis 20 and comprises: a body 22, 122; elastic clips 24; a spacer 26; a pin 28; a connecting element 30, 130; an actuator 32, 132; and a spring 34, 134. The binding 110 according to the second embodiment further comprises a sleeve 136.
    Figure 4 shows the elastic clamps 24, the spacer 26, the pin 28 and the connecting element 30 of the binding 10. Figure 8 shows in exploded perspective, on the one hand the elastic clamps 24, the spacer 26 , the pin 28 and the connecting element 130, and on the other hand the sleeve 136, of the fastener 110.
    As will be explained below, the second embodiment of FIGS. 5 to 8 is particularly designed to have a small footprint along the main axis 20.
    The body 22, 122 is hollow, defining an internal cavity 38, 138 of substantially cylindrical shape. A first axial end of the body 22, 122, called the front end, comprises a bearing face 40 substantially perpendicular to the main axis 20. Said bearing face 40 is capable of coming into contact with the first face 14 of the structures 12 , 112. The bearing face 40 has a first central opening 42 communicating with the internal cavity 38, 138.
    A second axial end of the body 22, 122, called the rear end, has a second central opening 44 communicating with the internal cavity 38, 138. Preferably, the second central opening 44 has a diameter greater than that of the first central opening 42.
    The first 42 and second 44 central openings open on walls 43, 45, called front wall and rear wall respectively, of the internal cavity 38, 138. Each of the front 43 and rear 45 walls is substantially perpendicular to the main axis 20.
    In the second embodiment of FIGS. 5 to 8, the body 122 comprises an internal ring 146 forming an axial projection relative to the front wall 43. A rear surface 147 of said internal ring, oriented towards the rear end of the body 122, is able to form an axial stop as will be described later.
    The body 22, 122 further comprises two lateral openings 48, of substantially circular shape. The lateral openings 48 communicate with the internal cavity 38, 138 and are located opposite with respect to the main axis 20. Said lateral openings 48 define a transverse axis 50 perpendicular to said main axis 20. In the following of the description, we consider an orthonormal base (X, Y, Z), the longitudinal X and transverse Y directions representing the respective directions of the main axis 20 and the transverse axis 50.
    Near the front wall 43, the internal cavity 38, 138 includes rotation blocking elements, such as flats 51, 151 parallel to the main axis 20 and arranged around said axis. In the second embodiment of FIGS. 5 to 8, the flats 151 are formed on the internal crown 146.
    In the second embodiment of Figures 5 to 8, the body 122 of the fastener 110 is formed in one piece. In the first embodiment of Figures 1 to 4, the body 22 of the fastener 10 is formed of a main part, comprising in particular the rear end, and a cap 52 comprising the front end and the face of support 40. The main part and the cap 52 are fixed to each other.
    In the second embodiment of FIGS. 5 to 8, an external surface of the body 122 comprises elements for locking in rotation, such as flats 154 parallel to the main axis 20 and arranged around said axis. The flats 154 are in particular capable of locking the body 122 in rotation in a fitting nose (not shown) similar to the fitting nose 202 of FIG. 9.
    The elastic clips 24 are intended to pass through the bore 18 of the structures 12, 112. The elastic clips 24 are substantially identical, at least two in number, and more preferably at least three or four in number. In the first and second embodiments shown, the elastic clamps 24 are four in number.
    The elastic clamps 24 extend substantially parallel to the main axis 20 and are arranged substantially regularly around said axis.
    A first end of each elastic clamp 24 comprises a hooking spout 56, capable of coming into contact with the second face 16 of the structures 12, 112.
    The elastic clamps 24 pass through the first central opening 42 of the body 22, 122, the hooking nozzles 56 projecting relative to the bearing face 40. As will be described below, the elastic clamps 24 are movable in translation axial with respect to the body 22, 122 and locked in rotation with respect to said body.
    The spacer 26 extends along the main axis 20 and passes through the first central opening 42 of the body 22, 122. As will be described below, in the first embodiment of Figures 1 to 4, the spacer 26 is fixed relative to the body 22. On the other hand, in the second embodiment of FIGS. 5 to 8, the spacer 26 is movable in axial translation relative to the body 122.
    A first end 58 of the spacer 26, called the front end, forms an axial projection relative to the bearing face 40 of the body 22, 122, the elastic clamps 24 being arranged around said front end 58. A second end 60 of the spacer 26 is disposed in the internal cavity 38, 138 of the body 22, 122. Said second end 60 of the spacer 26 is crossed by a transverse hole 62 disposed in the transverse direction Y.
    The pin 28 extends in the transverse direction Y and passes through the transverse hole 62 of the spacer 26. In the first embodiment of Figures 1 to 4, the ends 64 of the pin 28 are inserted in the lateral openings 48 of the body 22, joining said pin 28 and the spacer 26 to the body 22 of the binding 10. The pin 28 thus extends along the transverse axis 50.
    On the other hand, in the second embodiment of FIGS. 5 to 8, the ends 64 of the pin 28 are arranged in the internal cavity 138 of the body 122 of the fastener 110, set back from the lateral openings 48 of said body 122. As it will be described below, the spacer 26 and the pin 28 are movable in translation along X relative to the body 122 of the binding 110, and locked in rotation relative to said body.
    The connecting element 30, 130 extends along the main axis 20 and is at least partially disposed inside the internal cavity 38, 138 of the body 22, 122. A first end of said connecting element 30, 130 is integral with a second end, opposite the attachment spout 56, of each elastic clamp 24.
    The connecting element 30, 130, hereinafter called the hollow rod, has a tubular shape. The first end of said hollow rod 30, 130 comprises an axial orifice 65 around which the elastic clamps are arranged 24. Said first end of the hollow rod 30, 130 further comprises a shoulder 66 forming an axial stop with the front wall 43 of the internal cavity 38, 138, so as to maintain said shoulder 66 inside said internal cavity.
    A second end of said hollow rod 30, 130, oriented towards the rear end of the body 22, 122, has a substantially cylindrical external surface of revolution and has a thread 67. In the first and second embodiments shown, the second end of said hollow rod 30, 130 is closed by a plug 68.
    The hollow rod 30, 130 has two lateral slots 70, 170, located opposite with respect to the main axis 20 and extending along X between a first 72 and a second 74 closed ends. The first 72 and second 74 ends of the lateral slots 70, 170 are oriented respectively towards the elastic clamps 24 and towards the thread 67.
    The spacer 26 passes through the axial orifice 65 of the hollow rod 30, 130, the second end 60 of said spacer being disposed inside said hollow rod. The pin 28 extends transversely in the side slots 70, 170, so that it can slide along X between the first 72 and second 74 ends of said side slots.
    In the first embodiment of Figures 1 to 4, the pin 28 being fixed relative to the body 22, the assembly of elastic pliers 24 / hollow rod 30 of the fastener 10 is thus locked in rotation around the main axis 20 by report to said body 22.
    In the first embodiment of Figures 1 to 4, near the first end of the hollow rod 30 of the fastener 10, an external surface of said hollow rod further comprises flats 76 cooperating with the flats 51 of the internal cavity 38. The flats 51 and 76 form an additional means for locking in rotation the hollow rod 30 in the body 22, making it possible to prevent a torque from being exerted on the pin during the use of the fastener 10. .
    In the second embodiment of Figures 5 to 8, the sleeve 136 of the attachment 110 extends along the main axis 20, between a first and a second open ends. The sleeve 136 is entirely contained inside the internal cavity 138 of the body 122 and locked in axial translation inside said internal cavity. The first and second ends of the sleeve are oriented respectively towards the front and rear ends of the body 122.
    Near the first end of the sleeve 136, an external surface of said sleeve has flats 178 cooperating with the flats 151 of the internal cavity 138, so as to block the sleeve 136 in rotation in the body 122.
    The hollow rod 130 is disposed inside the sleeve 136, projecting from the first end of said sleeve.
    The sleeve 136 has two lateral notches 180, located opposite the main axis 20 and extending along X. A first end of said notches 180 is open on the first end of the sleeve 136. A second end 182 of said notches 180 is closed.
    The pin 28 extends transversely in the lateral notches 180, so that it can slide along X between the first and second 182 ends of said lateral notches 180. By means of the sleeve 136, the pin 28, the spacer 26 and l the set of elastic pliers 24 / hollow rod 130 are thus prevented from rotating about the main axis 20 relative to the body 122 of the binding 110.
    The actuating element 32, 132, hereinafter referred to as a tie rod, has a tubular shape extending along the main axis 20. The tie rod 32, 132 passes through the second central opening 44 of the body 22, 122. A first end said tie rod 32, 132, disposed in the internal cavity 38, 138 of the body 22, 122, comprises a thread 84 capable of cooperating with the thread 67 of the hollow rod 30, 130. Said first end of said tie rod 32, 132 further comprises a shoulder 85 forming an axial stop with the rear wall 45 of the internal cavity 38, 138, so as to maintain said shoulder 85 inside said internal cavity.
    In the first embodiment of FIGS. 1 to 4, the first end of the tie rod 32 ends up on a surface 86 which is substantially flat and perpendicular to the main axis 20, called the front face of the tie rod 32.
    A second end of the tie rod 32, 132, called the rear end, protrudes outside the body 22, 122. Said rear end comprises a lateral surface 88 for assembly with a fitting tool such as the fitting nose 202 of the Figure 9, which will be described later. The lateral assembly surface 88 is in particular capable of locking the tie rod 32, 132 in rotation relative to said fitting tool. In the example shown, the lateral assembly surface 88 is formed by hexagon.
    In the first embodiment of Figures 1 to 4, the second end of the tie rod 32 further comprises a flange 89, or shoulder, adjacent to the lateral assembly surface 88 and forming a radial projection relative to said lateral surface of assembly. In the example shown, the flange 89 is in one piece with the rest of the tie rod 32. In a variant not shown, the flange can be an added piece.
    The spring 34, 134 extends along the main axis 20, between a first 90 and a second 92 ends. Said spring 34, 134 is entirely contained inside the internal cavity 38, 138 of the body 22, 122. The spring 34, 134 is capable of being compressed along the main axis 20.
    In the first embodiment of Figures 1 to 4, the spring 34 of the fastener 10 is formed by a stack of elastic washers, arranged around the hollow rod 30. The spring 34 is contained axially between the pin 28, integral with the body 22, and the front face 86 of the tie rod 32.
    In the second embodiment of Figures 5 to 8, the spring 134 of the fastener 110 is a helical spring, arranged around the sleeve 136. The first end 90 of the spring 134 is in contact with the ends 64 of the pin 28. The second end 92 of said spring 134 comes into axial abutment against the rear wall 45 of the internal cavity 38, 138, around the second central opening 44. The spring 134 thus exerts on the pin 28 a force in the direction X, oriented towards the front end of the body 122.
    The assembly 200 of FIG. 9 represents the binding 10 of the first embodiment, assembled to a fitting nose 202 according to a step of a method of installing said binding. Such a method will be described later.
    The laying nose 202 extends along a laying axis 203, coinciding in FIG. 9 with the main axis 20 of the binding 10. The laying nose 202 comprises a tubular support 204. Inside said tubular support, said laying nose also comprises: a roller cage 206, a crown 208, a rotary key 210, a plurality of holding claws 212 and an ejection rod 214.
    A first axial end of the tubular support 204, called the front end, has a front opening 216. A second axial end (not shown) of said tubular support 204 is suitable for being connected to an automatic laying machine (not shown). The roller cage 206 is axially adjacent to the front opening 216 and in particular comprises a plurality of rollers 217, extending along the laying axis 203 and arranged around said axis. Said roller cage 206, for example analogous to the device described in document EP2999571, is intended to block the body 22 of the fastener 10 in rotation, which has a cylindrical external surface of revolution.
    The crown 208 is axially adjacent to the roller cage 206, opposite the front opening 216. The crown 208 forms an internal radial projection in the tubular support 204.
    The rotary key 210 is arranged inside said tubular support, opposite the front opening 216 with respect to the crown 208. The rotary key 210 also has a tubular shape, arranged along the laying axis 203.
    A first axial end of said key, known as the front end, comprises an assembly head 218. Said assembly head comprises an imprint 220, capable of being assembled with the lateral assembly surface 88 of the tie rod 32 of the fastener 10 A second axial end (not shown) of said key is adapted to be connected to a device for rotating the laying machine (not shown).
    The rotary key 210 is axially movable relative to the tubular support 204. More specifically, said key comprises a compression spring 222, which exerts on the assembly head 218 an axial force oriented towards the front opening 216.
    The retaining claws 212 extend substantially along the laying axis 203 and are arranged around the rotary key 210. Preferably, the retaining claws 212 are three or four in number.
    A first axial end of each retaining claw 212 forms a hook 224 projecting radially inwards. The hooks 224 are arranged axially between the crown 208 and the assembly head 218 of the rotary key 210.
    A second axial end (not shown) of each retaining claw 212 is fixed to the tubular support 204. The retaining claws are flexible, the hooks 224 being able to move apart and to approach radially from each other.
    The ejection rod 214 is arranged along the laying axis 203 inside the rotary key 210. The ejection rod 214 has a front bearing surface 226, oriented towards the front opening 216 of the tubular support 204. The ejection rod 214 is movable in axial translation relative to said tubular support.
    A method of installing the fastener 10, 110 in the structures 12, 112, to form the assembly 13, 113, will now be described.
    At the start of the installation process, the fastener 10, 110 is in a first configuration, called the free configuration, shown respectively in FIGS. 1-2 for the fastening 10 and 5-6 for the fastening 110. In the free configuration, the washers forming the spring 34 of the fastener 10 are not compressed. In the second embodiment of Figures 5 to 8, the spring 134 of the binding 110 in free configuration is in a state of partial compression; the said spring keeps the pin 28 in abutment against the rear surface 147 of the internal crown 146 of the body 122.
    Furthermore, in the free configuration, the tie rod 32, 132 forms an axial projection of maximum length along the main axis 20, relative to the rear end of the body 22, 122. The shoulder 85 of said tie rod abuts against the rear wall 45 of the internal cavity 38, 138.
    Furthermore, in the free configuration, the shoulder 66 of the hollow rod 30, 130 abuts against the front wall 43 of the internal cavity 38, 138. The pin 28 is close to the second end 74 of the lateral slots 70, 170 of said hollow rod 30, 130. The elastic clamps 24 form an axial projection of maximum length along the main axis 20, relative to the bearing face 40 of the body 22, 122. The front end 58 of the spacer 26 is set back relative to the hooking nozzles 56 of said clamps. Said spouts 56 are thus in contact with each other, forming a minimum diameter perpendicular to the main axis 20.
    During a first phase of the installation process, the binding 10, 110 in free configuration is assembled to an automaton (not shown) equipped with a fitting tool such as the fitting nose 202 of FIG. first phase will be described below for fixing 10 of the first embodiment:
    At the start of the first phase of the installation process, the ejection rod 214 of the fitting nose 202 is in a retracted configuration, the front bearing surface 226 being behind relative to the hooks 224 of the claws 212. The fixing 10 is inserted into the front opening 216 of the tubular support 204 of the fitting nose, through the rear end of the tie rod 32. The axial movement of said tie rod 32 causes the retaining claws 212 to move radially around the lateral surface d 'assembly 88. Said lateral assembly surface is assembled with the imprint 220 of the rotary key 210, until the axial abutment of the body 22 against the crown 208. The flange 89 also comes into axial abutment against the assembly head 218. Furthermore, the hooks 224, having crossed said flange 89, come closer to each other, the claws 212 interlocking elastically on the flange. The tie rod 32 is thus held axially between the assembly head 218 and the hooks 224. The fastener 10 can then be moved by the laying machine without falling.
    During a second phase of the installation process, the binding 10, 110 is assembled to the structures 12, 112. The second phase is described below for the two embodiments:
    In a first step of the installation process, the elastic clamps 24 are introduced into the bore 18 of the structures 12, 112, from the first face 14. Then, the bearing face 40 of the body 22, 122 comes into contact with said first face 14. The attachment nozzles 56 are then projecting axially relative to the bore 18 and to the second face 16 of the structures 12, 112.
    In a second step, the body 22, 122 is locked in rotation relative to the structures 12, 112. In the case of the fastening 10, this locking is ensured by the roller cage 206 of the fitting nose 202.
    In addition, the fitting tool, coupled to the assembly surface 88 of the tie rod 32, 132, gives said tie rod a rotational movement around the main axis 20. In the case of the fastener 10, the rotation is printed by the rotary key 210.
    Under the action of said rotational movement, the cooperation of the thread 84 of the tie rod 32, 132 with the thread 67 of the hollow rod 30, 130 drives said hollow rod and the elastic clamps 24 in axial displacement towards the rear end of the body 22 , 122. The pin 28 being kept fixed relative to the body 22, 122, said pin slides in the lateral slots 70, 170 of the hollow rod 30, 130, in the direction of the first end 72.
    Likewise, the spacer 26 being kept fixed relative to the body 22, 122 by the pin 28, the rotational movement of the tie rod 32, 132 leads the hooking nozzles 56 to approach the front end 58 of said spacer . When said spouts 56 arrive axially at said front end 58, the elastic clamps 24 deform and the attachment spouts 56 move away from each other.
    The attachment nozzles 56 thus provide a grip with the second surface 16 of the structures 12, 112, at the edge of the bore 18. This configuration of the fastener 10, 110, called the intermediate configuration, corresponds to an assembly with structures d 'thickness P max , as shown in Figures 7 and 8 for the fastener 110. Figure 4 also shows the elastic clamps 24, the spacer 26, the pin 28 and the connecting element 30 of the fastener 10 in the intermediate configuration corresponding to a thickness P max .
    The description below relates specifically to the fastener 10 of the first embodiment of Figures 1 to 4. As shown in Figure 4, in the intermediate configuration, the pin 28 of the fastener 10 is substantially equidistant from the first 72 and second 74 ends of the lateral slots 70 of the hollow rod 30.
    In the case where the structures 12 to be assembled are of thickness less than P max , the rotary movement of the tie rod 32 is continued from the intermediate configuration. The hollow rod 30 continues to move rearward of the body 22 until the hooking nozzles 56 come into contact with the second face 16 of the structures 12.
    The configuration of FIG. 3, called the minimum configuration, corresponds to an assembly of the attachment 10 to structures 12 of thickness P min . This minimum configuration corresponds to a minimum clearance between the pin 28 and the first end 72 of the lateral slots 70 of the hollow rod 30.
    Whatever the thickness of the structures 12, after hooking the spouts 56 against the second face 16, the continued rotational movement of the tie rod 32 makes it possible to compress the washers 34 between the pin 28 and said tie rod 32. This compression allows applying a tension in the binding 10, such a tension being for example configured at the level of the fitting nose 202. It is therefore necessary to maintain a clearance, even a small one, between the pin 28 and the first end 72 of the lateral slots 70 .
    The description below relates specifically to the binding 110 of the second embodiment of FIGS. 5 to 8. As mentioned above, the binding 110 has a short length along the main axis 20. In particular, a length of the lateral slots 170 is less the stroke of the hollow rod 130 in the body 122 between the free configuration of Figures 5 and 6 and the intermediate configuration of Figures 7 and 8. This short length of the side slots 170 allows the use of a particularly short hollow rod 130.
    Consequently, during the rotation of the tie rod 132 from the free configuration of FIGS. 5 and 6, the entry into contact of the pin 28 with the first end 72 of the lateral slots 170 is substantially simultaneous with the alignment of the spouts d attachment 56 with the first end 58 of the spacer 26. The spacer 26 / pin 28 assembly and the elastic clamps 24 / hollow rod 130 assembly are then in the configuration visible in FIG. 8.
    The continued rotation of the tie rod 132 jointly drives the hollow rod 130, the elastic clamps 24, the pin 28 and the spacer 26 towards the rear of the body 122. The pin 28 slides in the lateral notches 180 of the sleeve 136, compressing the coil spring 134.
    As can be seen in FIG. 7, in the intermediate configuration corresponding to structures 112 of thickness P max , the pin 28 is slightly separated from the axial stop 147, which allows the spring 134 to apply a tension in the fixing 110.
    Depending on the thickness of the structures 112 to be assembled, the rotation of the tie rod 132 can be continued until maximum compression of the spring 134. The fixing 110 is then in the minimum configuration, corresponding to structures of thickness P min . In the minimum configuration, the pin 28 is close to the second end 182 of the lateral notches 180 of the sleeve 136.
    According to embodiments not shown of the attachment, the pin 28 inserted in the transverse hole 62 of the spacer 26 is replaced by a stop integral with said spacer, said stop being able to slide in the lateral slots of the connecting element .
    During a third phase of the installation process, the fastener 10, 110 assembled to the structures 12, 112 is dissociated from the setting tool. The third phase will be described below for fixing 10 of the first embodiment:
    As shown in FIG. 9, the ejection rod 214 is moved axially forwards, the front bearing surface 226 coming into axial abutment against the tie rod 32. The fixing 10 is thus pushed towards the outside of the tubular support 204. Under the action of said axial thrust, the retaining claws 212 move away from each other, releasing the flange 89.
    After the above-described installation of the fastener 10, 110 in structures 12, 112, a method of dismantling the assembly 13, 113 thus formed is carried out by rotating the tie rod 32, 132 in the opposite direction, so to return the binding 10, 110 in free configuration. Said attachment 10, 110 can then be dissociated from the structures 12, 112 and reused.
    The presence of the sleeve 136 in the attachment 110 of the second embodiment makes it possible to limit the total length of said attachment along the main axis 20, without narrowing the range P min -Pmax of thicknesses of structures 112 that can be assembled using said attachment 110 .
    Furthermore, in the minimum configuration of the fastening 10 of the first embodiment, the first end 58 of the spacer 26 forms a projection relative to the hooking nozzles 56, as visible in FIG. 3. On the other hand, in the minimum configuration of the fastener 110 of the second embodiment, the first end 58 of the spacer 26 is aligned with said hooking spouts 56, as in the intermediate configuration of FIGS. 7 and 8. The second embodiment of FIGS. 5 8 therefore makes it possible to produce an assembly 113 with a small footprint on the side of the second face 16 of the structures 112.
    In the embodiments of Figures 1-4 and 5-8, the fastener 10, 110 is removable so as to change one of its elements, if the latter is damaged by previous uses. In particular, the set of elastic pliers 24 / hollow rod, the spacer 26, the pin 28 and possibly the plug 68 are liable to be changed.
    A method of dismantling the attachment 10 of FIGS. 1 to 4 is for example described below: the attachment 10 being in the free configuration of FIGS. 1 and 2, the pin 28 is extracted from the rest of the attachment by inserting a pointed tool in the lateral openings 48 of the body 22. The cap 52 is then removed and the clamps 24 and the spacer 26 are extracted by the front end of the body 22.
    A method of dismantling the binding 110 of FIGS. 5-8 is for example described below: the binding 10 being in the free configuration of FIGS. 5 and 6, the pin 28 is extracted from the body 122 as described above. Then the tie rod 132 is rotated so as to screw the hollow rod 130 until it emerges from the second end of said tie rod. The set of elastic pliers 24 / hollow rod 130 is then dissociated from said tie rod, then the plug 68 and the spacer 26 are extracted therefrom by means of a tool.
    权利要求:
    Claims (13)
    [1" id="c-fr-0001]
    1. -Fixation (10, 110) for the temporary assembly of at least two previously drilled structures, said fixing comprising:
    - a hollow body (22, 122), extending along a main axis (20), a first end of said body comprising a bearing face (40) substantially perpendicular to said main axis;
    - A plurality of elastic clamps (24) movable relative to the body (22, 122) and extending substantially parallel to the main axis, a first end of each elastic clamp comprising a hooking spout (56), said spouts hooking projecting relative to the bearing face (40) of the body;
    - a spacer (26) extending along the main axis, a first end (58) of said spacer projecting relative to the bearing face (40) of the body, the plurality of elastic clamps (24) being arranged around from said first end, a second end (60) of said spacer being disposed inside the body;
    - a connecting element (30, 130) movable relative to the body and extending along the main axis inside said body, a first end of said connecting element being integral with a second end of each elastic clamp ( 24); and
    - an actuating element (32, 132) connected to a second end of the connecting element by a mechanism (67, 84) of the thread / tapping type;
    the binding being characterized in that:
    - The connecting element (30, 130) is crossed by a lateral orifice (70) substantially disposed in a transverse direction (Y) perpendicular to the main axis, said lateral orifice extending axially between a first (72) and a second (74) closed ends; and
    - The binding further comprises a stop (28) extending in the transverse direction and integral with the spacer, said stop being disposed in the lateral orifice (70) of the connecting element, so as to slide between the first (72) and second (74) axial ends of said lateral orifice.
    [2" id="c-fr-0002]
    2, - A binding according to claim 1, further comprising a compression spring (34, 134) disposed inside the body (22, 122) around the connecting element (30, 130), said spring being suitable to be compressed along the main axis, one end (90) of said spring being able to come into contact with the stop (28) on either side of said connecting element.
    [3" id="c-fr-0003]
    3. - Attachment according to one of claims 1 or 2, wherein the second end of the connecting element comprises a thread (67) and the actuating element comprises a thread (84) cooperating with said thread.
    [4" id="c-fr-0004]
    4. - Attachment according to one of the preceding claims, in which the second end (60) of the spacer is traversed by a transverse hole (62) disposed in the transverse direction (Y), and the stop (28) is a pin assembled to the transverse hole.
    [5" id="c-fr-0005]
    5. - A binding according to one of the preceding claims, in which the plurality of elastic clips (24) comprises at least three elastic clips and preferably at least four elastic clips.
    [6" id="c-fr-0006]
    6. - Attachment (10) according to one of the preceding claims, wherein the stop (28) is fixed in translation along the main axis (20) relative to the body (22).
    [7" id="c-fr-0007]
    7. - Attachment (110) according to one of claims 1 to 5, further comprising a sleeve (136) disposed inside the body around the connecting element, said sleeve being fixed relative to the body (122 ), a first end of said sleeve comprising two notches (180) extending axially and located opposite one another relative to the main axis (20), the stop (28) passing through said notches and being able to slide in said notches along the main axis (20).
    [8" id="c-fr-0008]
    8. - A binding according to claim 7 taken in combination with claim 2, wherein the compression spring (134) is disposed around the sleeve (136).
    [9" id="c-fr-0009]
    9. - Attachment according to one of the preceding claims, in which a first end of the actuating element (32, 132) is disposed inside the body and a second end of said actuating element forms a projection by relative to a second end of said body.
    [10" id="c-fr-0010]
    10. - Attachment according to claim 9, wherein the second end of the actuating element (32, 132) comprises an element (88) for coupling with a rotary installation tool.
    [11" id="c-fr-0011]
    11. - Attachment (10) according to claim 10, wherein the second end of the actuating element (32) further comprises a flange (89) forming an external radial projection.
    [12" id="c-fr-0012]
    12. - Installation nose (202) for the assembly of a fixing (10) according to claim 11 with at least two previously drilled structures, said installation nose comprising:
    - a device (206) for blocking the rotation of the body (22);
    - a rotary installation tool (210) comprising means (220) for coupling with the coupling element (88) of the second end of the actuating element (32), so as to drive in rotation said actuating element; and
    - A device (212) for elastic fitting onto the flange (89) so as to axially maintain the fixing (10) assembled to said fitting nose.
    [13" id="c-fr-0013]
    13. - Assembly (13, 113) comprising:
    - structures (12, 112) to be assembled, comprising a first (14) and a second (16) opposite faces, as well as a bore (18) opening onto each of said first and second faces; and
    - A binding according to one of claims 1 to 11, the plurality of elastic clamps (24) being arranged in the bore, the bearing face (40) of the body (12, 112) and the hooking spouts ( 56) coming into contact respectively with the first face (14) and the second face (16), the spring (34, 134) exerting a tension tending to bring said bearing face and said hooking nozzles along the axis main (20).
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    同族专利:
    公开号 | 公开日
    EP3781825A1|2021-02-24|
    CN111989499A|2020-11-24|
    US20210025424A1|2021-01-28|
    WO2019201980A1|2019-10-24|
    FR3080155B1|2020-05-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2676258A1|1991-05-06|1992-11-13|Aerospatiale|Assembly member for components|
    FR3014969A1|2013-12-16|2015-06-19|Lisi Aerospace|TEMPORARY FIXATION|
    WO2017013612A1|2015-07-22|2017-01-26|Kwikbolt Limited|High tolerance removable blind fastener|WO2021156362A1|2020-02-06|2021-08-12|Lisi Aerospace|Circular clip pin clamp with fixed separator|
    WO2022008042A1|2020-07-07|2022-01-13|Seti-Tec|Device for setting a temporary fastener|US2775155A|1954-04-12|1956-12-25|Monogram Mfg Company|Sheet metal clamp|
    GB839089A|1957-12-07|1960-06-29|Bayswater Motors Ltd|Plate clamp|
    US3162072A|1963-06-10|1964-12-22|Wedgelock Corp Of California|Nut runner attachment|
    FR2629529B1|1988-04-01|1990-12-28|Aerospatiale|
    JP4902480B2|2007-09-27|2012-03-21|川崎重工業株式会社|Suspension and processing method using the same|
    WO2009055298A2|2007-10-22|2009-04-30|Monogram Aerospace Fasteners, Inc.|Blind fastener|
    CN101576108A|2008-05-09|2009-11-11|鸿富锦精密工业（深圳）有限公司|Fixing device|
    BRPI0917900A2|2008-08-26|2015-11-10|Travis Mcclure|temporary fasteners|
    ES2524375T3|2009-04-13|2014-12-05|Travis Mcclure|Temporary blind-side thrust fasteners, systems and methods|
    FR2991219B1|2012-05-30|2015-02-27|Lisi Aerospace|FAMILY OF TEMPORARY FIXINGS AND DEVICE FOR INSTALLING SUCH FASTENERS|
    FR3005886B1|2013-05-22|2015-06-19|Lisi Aerospace|DEVICE FOR INSTALLATION OF TEMPORARY FIXINGS|
    GB2520325A|2013-11-18|2015-05-20|Airbus Operations Ltd|A clamp for removing a temporary fastener|
    JP6411317B2|2015-12-08|2018-10-24|株式会社ニフコ|Fastener|CN112571417A|2020-12-14|2021-03-30|福建农林大学|Interim fastener and automatic assembly manipulator thereof|
    法律状态:
    2019-03-21| PLFP| Fee payment|Year of fee payment: 2 |
    2019-10-18| PLSC| Search report ready|Effective date: 20191018 |
    2020-03-13| PLFP| Fee payment|Year of fee payment: 3 |
    2021-04-29| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1853326A|FR3080155B1|2018-04-17|2018-04-17|TEMPORARY FIXING OF STRUCTURES|
    FR1853326|2018-04-17|FR1853326A| FR3080155B1|2018-04-17|2018-04-17|TEMPORARY FIXING OF STRUCTURES|
    EP19718356.9A| EP3781825A1|2018-04-17|2019-04-17|Temporary fastener for structures|
    US17/045,957| US20210025424A1|2018-04-17|2019-04-17|Temporary fastener for structures|
    CN201980025893.6A| CN111989499A|2018-04-17|2019-04-17|Temporary fastener for structure|
    PCT/EP2019/059895| WO2019201980A1|2018-04-17|2019-04-17|Temporary fastener for structures|
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