FR2536324A1 - APPARATUS FOR INSTALLING ATTACHES - Google Patents

Abstract

THE INVENTION RELATES TO AN APPARATUS FOR INSTALLING FASTENERS. THIS APPARATUS, IN THE SHAPE OF A GUN, INCLUDES A THREADED ROD 25, MEANS FOR TURNING IT AND SCREWING IT INTO THE THREADED PART OF THE ATTACHMENT, MEANS 28 TO LOCK THE ATTACHMENT AXIALLY WHILE THE ROD 25, CONTINUING TO TURN, PULL THE SCREWDED PART OF THE TIE, ENGAGED IN A MOUNTING HOLE, TOWARDS THE REAR OF THE GUN, SO AS TO CRUSH THE UNTHREADED PART OF THE TIE AGAINST THE EDGE OF THE HOLE; ACCORDING TO THE INVENTION, MEANS 44 ARE PROVIDED TO PREVENT THE ROTATION OF THE THREADED ROD 25 UNTIL THE STOPPERS 28 HAVE BEEN MOVED SUFFICIENTLY FORWARD TO REMOVE THE TIE FROM ITS SUPPORTING PARTS. THIS APPARATUS ALLOWS TO FIX KNOWN FASTENERS, THREADED INTERNALLY, FOR EXAMPLE TO SHEETS.

Description

The present invention relates to apparatus for installing

  Attacheos of the type in which a first threaded portion is drawn to a second portion 9 to deform the fastener and install it into an opening formed in a room in which the second stage of the installation usually comprises a threaded gold rod. screwing in the first part of the acne ebe the rotation of the threaded body causing first lengeng e nt by lssage lorgaue in the first part of

  the aba heh and the puarsuite of the rotation of 19 threaded member a-

  leading the tool to be pulled along the body organ also coer means of stopping to limit the pouting

   vam Oentw -al of the second part of the lattice along the gold-

  ganeilité, from which it follows that the first part of the attachment

  is pulled towards the second part to deform the fastener and

  Tallero Linve ntion is a device for installing

  fasteners, of the type in which a first threaded portion is

  to a second part to deform the fastener and the linstal

  ler in the opening of 9 ul room in which it is placed -

  this installation apparatus includes a threaded member for

  screw by screwing in the first part of 1a fasteners Ia rota

  tion of the threaded member causing first the engagement by screw-

  of the organ in the first part of the attachment and the

  following the rotation of the threaded member leading the first part

  part of the fastener to be pulled along the ogen:

  stop means for limiting the axial movement of the second part.

  tie of the fastener along the threaded member d 8 o it follows that q.

  the first portion of the staple is pulled toward the second portion to deform the fastener and install the members to simibly releasably carry a fastener to the apparatus axially forward of the means and the threaded member; the fastening support members and the arresting means being alternately displaceable relative to one another, so that the arresting means can be moved forwardly relative to the support means The device according to the invention is characterized in that it also comprises means for preventing the rotation of

  the threaded member until the stop means have been de-

  placed sufficiently forward to remove the stain

fastener support ganes

  Preferably, the means for preventing the rotation of

  take position detecting means for detecting when the arresting means has moved sufficiently far forward to remove the fastener from the fastener support members and then provide a signal enabling the threaded member to tilt to

screw in the fastener.

  Preferably, the apparatus comprises means for automatically starting the rotation of the threaded member when the arrows are moved sufficiently far forward to remove

  The attachment of the organs of the port.

  Preferences the installation apparatus further comprises

  attachment supply means for bringing a new

  stain on slupporte organs and the means of detecting the

  sition are brought to actuate the power supply of fasteners so as to open a new fastener after the means of arrgt have been moved to tarri Sre relative to the organs of

  attachment bracket a sufficient distance to allow reception

  a new fastener in front of the means of arr 8 to

  From the prefern o the means for detecting the position con-

  continue to deliver a package until the means of

  were moved back to the rear of the said sufficient distance and the

  such means also carries means sensitive to the disappearance of the signal, to cause a new tie,

  A specific embodiment of the invention will now

  to be described as exmile, with reference to the accompanying drawings in which FIGS. 1 to 10 show an existing installation tool to which the invention can be referred while FIG. 11, which corresponds to FIG. represents a tool

deinstaillation according to the invention.

  Figure 1 is a view, in axial section, of a fastener to be installed.

  FIG. 2 is a view, in axial section, of the fastener

stuck in a plate.

  FIG. 3 is a view, partially in axial section, and

  in elevation, tun portable installation tool, featuring a nose.

  FIG. 4 is an end view of the nose of FIG.

2536324 '

  Figure 5 corresponds to a part of Figure 3 but shows the mandrel in the retracted position Figure 6 corresponds to Figure 4, but represents the

chuck in retracted position.

  FIG. 7 is a view, in horizontal axial section, of the nose, with the mandrel in the retracted position;

  Figure 8 is a street of the nose in exterior elevation.

  FIG. 9 is a view similar to FIG.

  has a restraint attached to the nose, and in place in a hole

of a plate.

  Figure 10 is an elevational view of a control lever

  FIG. 11 is a view corresponding to FIG. 3A and shows the installation tool according to the present invention. The fastener 11 shown in FIG.

  galvanized steel and has a general shape

  wise, 10, crossing it completely. Its outer surface is cy-

  With the exception of a milled cutter 129, which is radially expanded at one end, the portion 13 of the fastener adjacent to the head has a relatively thin wall, but the portion 14, farther from the head.

  has a thicker wall and an internal thread 15 o When X lem-

  bends, the fastener is inserted into a suitable hole 16 (see FIG. 2) in a plate 17, and it is axially crushed by pulling the threaded portion 15 while holding the head 12, and the result is

  Part 13 gondolas outward to form an annular fold

  Nucle 13a, and that the head is deformed outwardly, as 12a represented, so that the fastener is firmly gripped in the plate Such fasteners are well known in the industry of mechanical assemblieso The installation tool illustrated by way of example in FIGS. 3 to 10 comprises a reversible compressed air motor having a body 22, a pistol grip 23, and an actuation trigger

  24 The compressed-air motor causes, through the medium of a machine,

  torque limiting mechanism, a rotatable threaded mandrel, 25, protruding from the front of the front part, 26, of the tool body; a sliding sleeve 27 biased forwardly by a spring surrounds the sliding sleeve 27, biased towards Leaving by a spring, surrounds

2536324 '

  the protruding mandrel The male thread on the mandrel 25 cor-

  correspond to the female thread on the fastener to be installed, and the dia-

  The outer sleeve of the spring sleeve 27 is fitted with clearance in the thin-walled portion 13 of the fastener. The annular end face 28 of the front portion of the tool is knurled in order to come into contact.

  with the t 8 te 12 of the fastener and support axially in re-

  attached to the rotation of the fastener during installation, c Qci

  constituting the means of arrest mentioned above.

  The mandrel can move axially towards the rear,

  the front portion 26 of the tool has a limit distance 9 against biasing a spring independently of the spring sleeve.

  27 The movement of the mandrel forward of part 26 is limited in

  situs so that the chuck can exert a t-nsion.

  Such an installation tool is well known in the field of atm stains of the type described

  The installation tool of this model is equipped with an ac-

  capper for automatically bringing the fasteners to the mandrel & This accessory includes an adapter sleeve, 31, attached to the body

  of the tool 22, and carrying a nose member 32 for the quick release

  Axial relative to luoutilo This nose is emp 8 cha turning around the body, imoyen d 9 uno screw 33, protruding

  through the sleeve 31, and engaging in a longitudinal groove

  dinal 34, on the underside of the front of the nose member.

  At its front end, the nose member 32 has a nose 30

  ci comprises a split support, lined with two pairs of support members, 37, 38, the pair 37 being on the left and the pair 38

  being on the right, as shown in Figures 4 and 6.

  A helical coil spring 39 solicits the

  32 to a forward position, as shown in FIG.

  In this position, there is a space 41 behind the organizations

  37, 38, and in front of the mandrel 25, in which a

  The stain may be placed by compressed air, via a pipe 42, connected to a tubular connector 43 on the top of

  the nose member 32, and making an acute angle with the axis of the mandrel.

  The front end of the connector 43 opens into the space 41, and the fasteners are fed along the pipe 42, one by one

  that it is delivered by means of a food bowl and a

  3 itii 'The familiar step nozzle is operated by a pro-mitting cutter 44, mounted on the top of the sleeve, at 3% rev 3 and actuated by a magnet 45 above IG 1 The fastening system of fasteners is located at the same time as the new fastener is attached to it in the space 41 when the mandrel is in the eooplastic position, and is shown in FIG. As soon as a new fastener is thus brought, its speed = 1 O se and the pressure of the compressed air which push it are sufficient to get it into the cavity 46 o which is defined between the two pairs El 2 org-nes of s Lpport 37 , 38, The nose 30, comprising these sports organs and their attachment retaining means are now described in each of the following examples: 37 each of the pair 37, and each support 38 to 38 b of the pair 38 constitute respectively part of a lever 37 c O 37 d or 38 c, 38 do Figure 10 represents The lever 37 c 9 carrying the support 57 has at its extremity between the levers of each pair is sandwiched a third levers 47a or 48a respectively D provided at its extremity before a member 47 or 48c respectively, for the Each set of three levers is shaped to fit in a longitudinal slot, 49 or 5% of the nose 309, the two slots being opposite one another. The three levers are provided with a pivot hole, 52c towards the rear end, the pivot holes of the lever sets 37c, 47b and 37d being journalled on a pivot axis 535, passing through the slot 49, while the pivot holes of the levers of the other set , 38c, 48a and 38d are journalled on a pivot axis 54, passing through the other slot "510 With reference to the particular levers 37e and 47a shown in Fig. 10, behind its pivot hole 52e the lever 57 c forms two partially cylindrical cavities, 55 and 56, located One is behind the other, while the retaining lever 47a is formed with a short leg 57 which is located beyond the rear end of the cavity 55, which is close

  of pivot Ltother lever, 37 d, is the image in a mirror of the-

  57 c, so that when the three levers 37 c 47 a and 37 d are assembled on the pivot axis 53 in the slot 4 g both

  opposing cavities 55 together form a substantially cy-

  lindrique, and likewise the two opposite cavities 56 form

  seems a substantially cylindrical chamber As can be seen

  in FIGS. 7 and 9, the chamber formed by the cavities 55

  closes a small compression spring 9 58, which acts on the tab 57 to urge 11 retaining member 47, at the other end of the

  lever, radially towards the inside of the nose.

  The radial direction of the member 47 is determined by the contact of the portion 60 of the lever with an inner portion of the slot 49. The chamber formed by the recesses 56 houses a second compression spring 599 which acts on the end walls of the two tows 56 e to solicit the two support members 37 an 37 d 5 at the other end of the levers 370, 37 d, to 1'inté &

  The lower position of the support organ is de-

  terminates by contact of the portion 61 of the lever with an inertial portion of the slot 49 o The support members are r alized as shown in Figures 10 and 6 e with a face 80 forming an angle of 45

  degreeso Quarnd all supports 37 ae 37 bg 38 a 9 38 b are closer

  20 years ago, as described above, they define

  between their faces 809 the cavity 46, referred to above

  sues in which the mortar of the body of a fastener 11 can just enter the extreme end of the face 80 of each support

  is curved or chamfered, as shown in 70, in order to

  ter llentra latte in the cavity 46 defined by the faces

    The head 12 of a fastener will fit just between the beveled faces.

  70, but will not go further.

  The front faces of the supports form a frontier face.

annular tale, 35 on the nezo

  Each retaining member of the attachment is made as re-

  shown in Figure 10, with reference to the member 47 at its rearmost end 9 has a sloping face 63, then a

  small notch 64, and 9 towards its foremost end, a

  The ratio of the shapes of the support and the attachment retaining members is such that, when aligned with their respective pivot axes, in their respective slots 49, 51, and

3624

  held inward under the solicitation of the springs

  58, 59, as previously described, the notches 64 are

  jste in front of the backs, 669 supports, ni

  With the faces 70 it is intended that the force which urges the fastening members 47, 48 together (in their fastening retaining position) is substantially less than the force which urges the support members 37 a , 37 be 38 ap 38 b (in their closed position) o This is facilitated by the fact that

  springs 58 act on the levers 47 ao 48 a, in good points.

  blow closer to the common pivot axes 53 or 54 ï than the reso

  spells 59 act on the levers of support

  in this example is approximately 152) 0

  Action of support levers and levers of restraint

  Naked attachment to guide retain and release 1 clip will now

to be described.

  As described earlier, velocity and current

  propellant air of a new fastener, delivered along the

  cord-tubulaire 43, in space 41, are sufficient to make it

  entering the cavity 46 o This forces the organs of restraint away from

  naked 47, 48, the front end of the fastening striking and spreading the opposite inclined faces 63 o The fastening continues its way in the

  cavity being easy by the bevel 70 until the t 8 te 12-.

  widened, radially of the fastener, which is now at its

  behind, also in contact with the faces 63,9

  clinics & the opposite, and pushes them aside to switch between them

  When the head 12 of the fastener protrudes from the front ends of the

  these inclined 63 and arrives at the notches 64, the head frap-

  eg the bevelled faces 70 of the supports and suarr 8 te immediately

  The retaining members come closer because the notches 64

  pick the te te 12 of the fastener which protrudes radially O Com-

  shown me in Figure 9, about half the length of

  the fastener protrudes forward of the front face 35 of the nezo.

  The fastener is supported on its periphery by the faces 80 of the

  ports, defining the cavity 46 D in contact with it about half of its length. It is retained against any axial movement towards the front of the nose, by the contact of its head 12 with the

  chamfered faces 70 of the supports-and with the notches-'64 and

  all rearward movement by its contact with the notches 64 of the retaining members 47 and 48 where the operator then manipulates and moves the tool so as to bring the projecting part of the fastener into the hole 16 of the 17 o This is a fan

  the support provided to the fastener by the

  port and in particular by the obstacle to the rearward movement of the lattice, which constitute the notches 64 of the retaining members. The fastener is arranged so as to penetrate into the hole 16.

  until the face 35 of the nose stops against the most

  FIG. 9 (the mandrel 25 and the front 26 of the tool there is shown that the threaded portion of the fastener extends beyond the face remote from the plate. are deleted for the sake of clarity) 0

  The operator then pushes the body of the tool towards the

  that (keeping the axis of the tool perpendicular to the plate so as to also hold the tie in this alignment), compressing

  the spring 39 o the mandrel 25 advances towards the fastener and eyentuelle-

  It reaches the end 6 closest to the bore 100 Coxm e the mandrel does not turn% it can not penetrate the t 8 te% but it

  retracts into the portion 26 of the tool while over- acting its spring.

  At the same time, the front end of the sleeve 27 & spring enters the bore -10

  At about this point (depending on the dimensions

  the attachments and their relation to the

  lative d mandrin 25 and the front portion 26 of the tool); the

  this d 2 front end, 28 of the tool reaches the inclined faces 63 of the retaining members 47 and forces them to open, releasing the notches 64 of linkage with the mast 9 t 12 te attachmento It also comes into contact with the bevelled faces 70 A learri & re

  supports and forces them to be squeezed apart

  70 of the supports of the contact with the head 12 of the fastener O The

  stain is thus released to move forward under the push-

  The head 12 of the fastener is pressed firmly against the rear face of the plate 17 by the front face of the front end 28 of the tool until the head 8 passes over the front face 35 of the nezo. before 28 of the tool and the part 14 of the fastener protrudes 9. lddo the lace back of the plates L Vcpérateur press then

  the e 24 to flee turn the chucks, and the Voutil deinstal-

  ldveotio fontone now to install leettache the way

  uae 71311 c The chuck 25 screws the chuck into the chuck.

  I Lgo 1 of t Lhe 1 ee ndrin s o entangles to the forefront in there dc airt: i 26 & i 1 aui the gettin g the spring of relaxes zus q ue that q 9 th The end-to-end angle of the ivandrin abutting on a beam 9 extends to the inside or a wall before the part 26 The continuation of the rotation of Flandrin then carries the part of the thread 14 of the fastener towards his head 12 D which L stops against

  inoyeis d 2 arr CM -orévus on the Lace before 28 of the 26th part of 19 or-

  tii This exerts a Wdale Comporession on 18 tie 2 bringing the

  part 13 of its wall to, Ge curl and if bend against the face

  The plate 12 can also be deflocated towards the front face of the plate to install the fastener in the plate. When the fastener is simultaneously crushes the device L 1 torque limiter in 2) tool Lonctionnia and the reverse operator

  the direction of rotation of the motor to unscrew the mandrel from the

  stains, leaving the patch at 1 Ili, in the plate as

  Figure 2, to form a nut of the anchor in

  When the operator removes 12 platelets from the plate, the plate

  fate 9 revises nose lens 32 i its forward position

on the Ligure 5.

  A problem that arose during the summer of May

  of the installation above is that, the operator pressed the, de-

  24 is too tight, so that the mandrel 25 is rotated.

  when he reaches the near end of Liletage 1; 5 in 12 attacks = -

  It is maintained in the holder 37 f, 38 and the operator does not push the body of the tool 18 fast enough to the Vav-antu it is possible that the clip is radially expanded. Tniqvel is still total 6 nuent or partaielement in the support. 10 ui

  and requires disassembly of the support 37 e 38 To clear the wedge

  In order to solve this problem, the present invention is applied to the tool in the manner diagrammatically shown on FIG.

  figure 11 In figure 11g the parts already represented and de-

  are referred to by the same references In addition we have

  presented a separate dual-control and control block 101

  Tapping 102 (including the above mentioned bowl and exhaust system) 6 an exhaust control block 103 "and an engine air control valve 104 and a valve control block 105 o L Bair compressed is supplied to the block at the inlet 106, where a branch supplies air to the supply 102 which delivers fasteners in the pipe 420. Another branch sends the valve 104 to the control valve 104 through the nozzle 107 to the tool. 21 There it is supplied by the hand-operated valve 08 operated by the trigger 24, to the air motor 109. The proximity switch 44 is connected by a

  flexible 4-wire 4 flexible 110 to the laws at the control block 103 2-

  Fig. 3 and 11, when the tool is in its position with the nose and mount at the position of the valve and the valve control block 105, as can be seen in FIGS. 3 and 11. 58 37 "1 i Lainat 45 is against the switch of pron dity 44 Dalans

  this example is that of a proidmitt 44 is a device A ef-

  fat Hall q 2 _i dewent passing to give an electrical signal to the

  cable 110 when 1'lant 45 approaches a predetermined distance.

  The proidmit switch 6 44 is mounted on the adapter sleeve

  31 which is fiae with respect to the body 22 of the tool and in particular

  bind relative to the front face 28 of the portion 26 of the tool.

  The triggering magnet 45 is mounted on the nose 30 which carries the

  ports 37 e 38 The -positions of the switch 44 and the in-imant de-

  Trigger 45 are reordered and adjusted so that the controller 44 begins to give a signal only when the tool has moved soffisa 3 ment far away from before compared to the ndz 30 for

  that the front face 28 of the part 26 of the tool has reached the

  this front of the nose so that the latch that is in front of the face 28 has been removed from the support 57, 38 The proximity switch 44 is further arranged for a laws that it has been actuated for

  signal, by approaching the magnet 45 at a distance

  determined it continues to give a signal until the magnet has been moved away from the switch by a substantially greater distance 255 Gb 24

  at the aforementioned predetermined distance. For example,

  The motor control valve 104 is arranged so as to be normally closed (so that the motor can not rotate) except when the closing distance between the magnet 45 and the proximity switch 44 is reached. the valve control block 105 receives a signal from the switch 44. Ansi, the tool mandrel can not turn until 12 attach and install is no longer in the holder 37, 38 o When the clip has been installed and the motor of the inverted tool (as described above), to unscrew the

  the chuck initially retracts into the

  tie 26 of the tool against its spring, while the press opener

  always the tool against the plate and thus discard the tool of 11 at-

  stain by pushing it O Learrangement above the commutateuar of -

  proximity allows the tool to move far enough towards

  the back compared to the nose 30 Opour that the mandrel is complete

  The fastener exhaust control block 103 is arranged to be released from the installed fastener before the engine is automatically shut off by the control valve 104. supply line 42 (in which 11 at = stain is luffed by the air coming from the inlet 106) each time the signal disappears from the cable 11 i O, that is to say whenever

  the proximity switch 44 is open O As has been de-

  This occurs when the tool 22 is pulled backward through the nose 30 by a distance substantially greater than that

  the switch closes, and this distance is ar-

  row to leave a retraction sufficient to allow a space 41 large enough behind the support 37, 38 <see Figure 5,) to receive the new fastener There is also a certain delay for the new fastener to reach the space 41, because of the time taken for the clip to move along

  of the supply line 42 from the power block

  to the tip of the tool (which in practice is about

very long).

  In a variant of the arrangement which has just been described with reference to FIG. 11, the valve 108 controlled by the trigger can be locked permanently in the position

  open The motor & air of the tool then works directly

  under the control of the valve 104 controlled by the signal and the reversing valve controlled by the hand Thus, the

  rotation of the mandrel will be started automatically when the

  che is released from support 37, 38 -

  In addition, the compressed air motor can be arranged to reverse automatically when the preset torque is

  reached, indicating that the fastener was heavily installed.

  This would realize a fastener installation tool in which the start of the inversion and the end of the rotation of the chuck are

completely automatic.

  The invention is not limited to the details of the preceding example. For example, the means for supporting an attachment of

  Removable way at the front of the mandrel does not necessarily include a pivoting arrangement 37 38 but can be achieved by

  springs in direct contact with the fastener or any other form of temporary support

Claims (4)

  lo Apparatus for installing fasteners of the type in the-   qaue a preçalre threaded part is pulled to a second part poezu Mr lat stache and 9 linstall in a fortue drue dr pi pi pi pi, which it is placed 6 e, apparatus including O ri orgr al-Get 'to sengsger by screwing in the prayer The removal of the threaded body firstly caused the removal of the organ in the first part of the process and the continued rotation of the threaded organ caused the loss of the part to be drawn easily from it. along the body or means for limiting the movement of the second part of the fastener along the thread member, whereby the first part of the fastener is pulled towards the second part to deform the fastener. and install and releasably support a fastener to be installed by the apparatus, further Qn before means of arrest and of 1-gold   ilatee, the attachments and the means of support   r being displaceable alternately 19 with respect to 19 others,   so that the means behind St can be moved to the   against the support members deattache to remove the attachment forward, characterized in that it comprises   also means (44, 105, 104) for pocketing the rotation of   threaded member (25) until the stopping means (28) has been sufficiently moved forwardly to remove the fastener (11) from the fastening support members (37, 38)   2 Apparatus for installing fasteners according to the claim   tion 1, characterized in that the means for   The present invention includes position detecting means (449) for detecting when the stopping means (28) is moved sufficiently forward to remove latch (114   fastening support (37, 38), and to then provide a signal   causing the threaded member (25) to turn to screw into the stain (11).   3 Apparatus for installing fasteners according to one of   claims 1 and 2, characterized in that it further comprises   means (105, 104) for automatically starting the rotation   the threaded member (25) when the stop means (28) is moved sufficiently forwardly to remove the clip (11) from the support members (37, 38).   4 Apparatus for installing fasteners according to the claim   2, further comprising feed means for   stains for bringing a new fastener to the support members, characterized in that the position detecting means (44 v 45) are arranged to actuate the fastener feeding means (102) to bring a new fastener (11 ) after the arresting means (28) has been moved rearwardly with respect to the support support members (57, 53) by a distance sufficient to allow reception of a new fastener in front of the arresting means ( 28) Apparatus for installing fasteners according to claim 4 in which the position detecting means (44) continues to provide an output signrl until the means (28) has been unlaced to a learner. of said sufficient distance, characterized in that it further comprises means   (103) e sensitive to the loss of signs L to cause born duae new fastener O