CA2147572A1 - Swaging tool - Google Patents
Swaging toolInfo
- Publication number
- CA2147572A1 CA2147572A1 CA 2147572 CA2147572A CA2147572A1 CA 2147572 A1 CA2147572 A1 CA 2147572A1 CA 2147572 CA2147572 CA 2147572 CA 2147572 A CA2147572 A CA 2147572A CA 2147572 A1 CA2147572 A1 CA 2147572A1
- Authority
- CA
- Canada
- Prior art keywords
- collar
- bolt
- housing
- chuck
- swaging tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000004323 axial length Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 description 6
- 241000193803 Therea Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
Previously it has been difficult to swage a locking collar to a stud bolt or the like if the bolt was inverted or access for the operator's hands difficult. The tool disclosed provides a chuck 38 to grip a collar regardless of the orientation of the bolt to which it is to be swaged.
The tool also provides for the disposal of a broken portion of the bolt produced by the swaging operation, and for an easily replaceable nosepiece.
The tool also provides for the disposal of a broken portion of the bolt produced by the swaging operation, and for an easily replaceable nosepiece.
Description
SWAGING TOOL
Background of the In~ention The present invention relates to a swaging tool for use in attaching a component to a panel having a standing bolt which pas~es through a hole of the co~ponent placed on the panel wherein a collar is attached to a portion of the bolt projeGting from the component and a portion of the collar i9 radially inwardly reduced to secure the collar to the bolt.
There is a known ~waging tool, shown in Japanese Patent Laid-Open No. 61-144415, that is used for attaching a component to a panel having a standing bolt under a condition that the component is placed on the panel with the bolt passing throu~h a hole of the component and a collar is attached to a portion of the bolt projecting from the component 80 as to radially inwardly reduce a portion of the collar to secure the collar to the bolt. Such a swaging tool has an elongated hollow housing, jaws retractably placed within the housing to grip the bolt in engagement ~ith the sides of the end portion of the bolt, and a nose piece fixedly connected to a housing front portion and extending from the jaws to engage with the outer surface of the collar, so that the jaws are retracted to pull out the end of the bolt to break a breakable portion of the bolt, to pull out the broken portion of the bolt and simultaneously to cause the nose piece to radially inwardly reduce the diameter of the collar to fasten the collar to the bolt.
To fasten a collar to a bolt by the use of the above-described s~aging tool, a component is placed on a panel in a manner that it is penetrated by the bolt and the projecting portion of the bolt i8 fitted into the collar.
Then, the nose piece of the swaging tool i~ held on the end of the bolt so as to receive it and is pressed directly onto the bolt and the received bolt is gripped by the iaws Z d ld3a lN31~d a~ bZ:80 ~6, ~z dd~
214 7~ 72 while the nose piece is brought into engagement with the collar. Next the tool is actuated to attach the collar to the bolt to mount the component on a panel. In short, the bolt has to be pre-fitted into the collar in order to ~asten the collar to the bolt. In the event the bolt is attached downwardly, however, the collar must be held by one of the operator's hands after the bolt is fitted into the collar. Since the other hand is occupied to hold and operate the swaging tool, ~uch fastening work is troublesome, If the component need~ to be held, it is inconvenient and the work i~ difficult to be accomplished by a single operator. Besides, where mounting space is too narrow to be reached by hands, the effort required to attach the collar to the bolt is alqo troublesome.
Sl .~y of the Invention According to the first aspect the present invention aims to provide a swaging tool capable of fastening a collar to a bolt even when the bolt is downwardly attached to a panel, even when the component has to be held by one of the operator's~hands or even when the mounting space is too narrow to be reached by hands.
In order to achieve the above-described object, according to a first aspect of the present invention, there is provided a swaging tool for use in attaching a component to a panel having a standing bolt which passe~ through a hole of the component placed on the panel wherein a collar is attached to a bolt portion projecting from the component and a portion of the collar i6 radially inwardly reduced to secure the collar to the bolt, the tool comprising an elongated hollow housing, jaw~ retractably placed within the housing to grip the bolt in engagement with the sides of the end portion of the bolt, and a no~e piece fixedly connected to a housing front portion extending from the jaws to engage with the outer surface of the collar, so that the iaw~ are retracted to pull out the end of the bolt, to break a breakable portion of the bolt to pull out 8 'd ld3a lN311~d a~a ~sz 80 S6, ~Z ;~d~
- ~- 21g7S72 the broken portion of the bolt and simultaneously to cause the nose piece to radially inwardly reduce the diameter of the collar portion to fasten the collar to the bolt;
characterized in that the swaging tool has a chuck positioned at the end o~ the nose piece to hold the collar being provided on the front end of the nose piece, the chuck being constructed 90 as ~o resiliently grip the side o~ the collar.
In the pre8ent invention, the chuck may be made up of circumferentially divided portions and be shaped to be sub~tantially cylindrical by an annular resilient body provided on its periphery. Each end of the cylinder has an inner diameter which is æmaller than the outer diameter of a flange on the front end of the nose piece and the chuck 15 is connected so as to move to the front of the nose piece.
In such a case, the rear end of the chuck preferably has pins attached thereto to be inserted into slits formed in the front end of the hou~ing, and the pins are urged again~t the ~houlder of a jaw caee for the jaws, the chuck being pressed out forwardly by the forwardly biased jaw case.
Alternatively, a spring may be positioned between the rear end of the chuck and the shoulder o~ the housing to press the chuck forwardly. Further, the chuck can be formed to be ~hort in axial length. The rear end of the chuck may be sandwiched between the flange of the nose piece and the ~houlder of the housing so as to ~horten the chuck in axial length. When the axial length of the chuck is ~hortened, the flange o~ the nose piece can be formed slightly behind the foremost end of the nose piece to align the flange with the foremost end of the nose piece when swaging tool iB actuated.
In the present invention, the chuck may be integrally molded with the nose piece, the resilient ring placed over the periphery of the chuck, and the chuck and the nose piece are formed sub~tantially cylindrically. In such a case, a small ball or rollers may be placed between the t7 d ld3a lN31~d a~a W~52 :80 56, ~Z ;~ldb~
inner side of the reeilient ring and the outer periphery of the chuck.
According to a second aspect of the invention, there i5 provided a swaging tool for attaching a component to a panel having a standing rod member passing through a hole of the component which is placed on the panels by pulling the rod member and breaking a projecting portion of the rod member out o~ component; the tool comprising a hollow housing, a pair of jaws retractably placed at the front end of the inner side of the housing to engage with a jaw case for retracting the jaw pair engaging the jaw grip portion of the rod member so that the jaw pair are urged to each other to grip the jaw grip portion and then to pull the iaw grip portion to break the rod member at a breakable portion of the rod member; and wherein the broken rod portion is discharged to the rear portion of the hollow housing;
characterized in that the inner portion of the housing i9 pro~ided with a tube connected to the rear ends of the jaws and extending up to the rear end of the housing so that the broken rod portion passes through the inner side of the housing and the r~ear of the tube is provided with moving means for moving the tube rearwardly to move the pair of jaws independently of the jaw case.
Preferably the jaw case in connected with a piston which is reclprocated in a cylinder formed in the rear portion of the housing; a stopper i~ mounted on the tube;
the moving mean~ comprising a collar to engage with the stopper, and a slide connected to the collar and ha~ing a portion thereof projecting from a slit of the housing outside; the slide being moved along the slit of the hou~ing to move the collar into abutment with the stopper to move the stopper rearwardly so as to move the tube rearwardly.
According to a third e~bodiment of the invention, 3~ there is provided a swaging tool for attaching a component to a panel having a standing bolt which passes through a hole of the component placed on the panel wherein a collar S d ld3a lN31~d a~ b'9Z:80 56, ~Z ;~ldl~
- ~ 21~7~72 i8 attached to a portion of the bolt projecting from the component and a portion of the collar i6 radially inwardly reduced to secure the collar to the bolt, the tool comprising an elongated hollow housing, retractable jaws placed within the hou~ing to grip the bolt in engagement with the sides of the end portion of the bolt, and a nosepiece fixedly connected to a housing front portion, to engage with the outer surface of the collar, so that the jaws are retracted to pull out the end of the bolt to break a breaka~le portion of the bolt, to pull out the broken portion of the bolt and si~ultaneously to cause the nosepiece to radially inwardly reduce the diameter of the collar portion to fa~ten the collar to the bolt;
characterized in that a rear portion of the nosepiece is threaded while a front end portion of the hou~ing is also threaded for ~crewing the externally threaded portion of the nosepiece there into.
Preferably the rear portion of the nosepiece is externally threaded while the front end portion of the housing i8 internally threaded.
Preferably tXe outer portion of a jaw case is formed in a stepped configuration which i8 slim toward the front end thereof.
Alternatively the rear portion of the nosepiece extends rearward to surround a jaw case and has an enlarged diameter portion, and the rear and inner portion of the nosepiece is internally threaded while the front end and outer portion o~ the housing i8 externally threaded.
~rief Description of the Drawings The present invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure l ie a partially sectional view o~ a first embodiment of a swaging tool according to the present invention, ~howing a principal portion in section and omitting a lower handle portion, s-d ld3~ lN31~d a~a w~sz 80 S6, ~Z dd~
Figure 2 is a partially sectional view of the swaging tool of Figure 1 holding a collar.
Figure 3 iB a partially sectional view of the swaging tool of Figure 1 holding the collar attached to a bolt, 5Figure 4 i~ a partially sectional view of the swaging tool of Figure 1 in operation, Figure 5 is a partially sectional view of the swaging tool of Figure 1 completing a fastening operation, Figure 6 is a section view of a nose housing of a 10second embodiment of a swaging tool holding a collar, Figure 7 iR a partially sectional view showing the . swaging tool of Figure 6 in operation, Figure 8 i~ a Rectional view of a hou~ing of a third embodiment of a ~waging tool holding a collar, 15Figure 9 is a partially sectional view of the swaging tool of Figure 9 in operation, Figure 10 is a sectional view of a noRe housing of a fourth embodiment of a swaging tool holding a collar, Figure 11 is a partially sectional view of the swaging 20tool of Figure 10 in operation, Figure 12 is~a sectional view of a nose housing of a fifth embodiment of a swaging tool holding a collar, Figure 13 is a partially sectional view of the swaging tool of Figure 12 in operation, 25Figure 14 is a sectional view of a nose housing of a sixth embodiment of a swaging tool holding a collar, Figure 15 is a partially sectional view of the swaging tool of Figure 14 in operation, Figure 16 is a sectional view of a swaging tool with 30the tube in an advanced position, Figure 17 is a sectional view of a swaging tool with the tube in an retracted position, Figure 18 is a sectional view of a tip portion of a swaging tool, and 35Figure 19 i~ a sectional view of a tip portion of a further embodiment of a swaging tool.
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Detailed Descri~tion o~ the Invention Figures 1 through 5 show a first embodiment of a 6waging tool 10 according to a first aspect o~ the present invention. The swaging tool 10 has a housing 12 equipped with a handle ll to be grasped by a hand. The housing 12 comprises a main housing 14 formed with a handle 11, and a nose housing lS forming an elongated main portion together with the main housing. The nose hou~ing 15 i9 connected via a screw to the main housing 14. The elongated main housing portion iB hollowed and various members are provided inside it.-On the front end of the nose housing 15, there are provided a pair of jaws 16, 16 to grip the end o~ the bolt standing on the panel, and a hollow cylindrical nose piece 18 attached to a front portion further forward than the front ends of the jaws to engage with the side of a collar to reduce the diameter of the collar to fasten the collar to the bolt. The jaws 16 are surrounded by an outer jaw case 1g. The rear end of the jaw case 19 is connected to a hollow connection rod 20 extending outwardly. The rear end of the conne~tion rod 20 is connected to a hollow piston rod 22 extending further rearwardly. The piston rod 22 extends to a cylinder 23 of the main housing 14. A
piston 24 is connected to the rod in the cylinder. When the tool is actuated, pressurized fluid or oil is fed through a pipe 27 to a front chamber 26 of the cylinder 23 to move the piston 24 rearwardly. On the periphery of the connection rod 20 connected to the jaw case 19, a coil spring 28 is provided between a front end of the connection rod and the front end of the housing 14 to push the jaw case 19 forwardly and to resiliently bias the piston 24 forwardly. The front chamber 26 in the cylinder 23 is formed to be smaller in diameter than the rest of the cylinder. When pressurized fluid is fed to the front chamber 26, the rearward movement of the piston 24 i8 stopped in a predetermined position that varies in response to the ~uantity of pressurized fluid to be fed. On the 8 d ld3a lN31~d a~a w~z :80 S6, ~Z ~d~
rear of the piston 24, an extended hollow rod 30 is formed and a stopper 31 is positioned adjacent to the rear end of the extended rod 30.
At a front end in the connection rod 20 connected to the jaw case 19, a hollow cylindrical jaw pusher 32 is placed to act upon the rear end of the jaws 16. A weak coil spring 35 is positioned between the rear end of the jaw pusher 32 and a small-diameter portion 34 in the connection rod 20 to push out the pair o~ jaws 16, 16 forwardly so that they can abut upon the inner surface of the jaw case 19. Since the coil spring 35 pushes the jaws 16 forwardly, the toothed surfaces of the jaws engage with the threaded portion of the bolt when the end of the bolt 15 is inserted between the jaw~ 16, 1~ to grip the bolt end reliably, preventing the gripped portion of the bolt from slipping off forwardly. An elongated hollow tube 36 is placed in the centre of the nose housing 15 and the centre portion of the cylinder 23 of the main housing 14 so as to allow the broken end of the bolt to be discharged rearwardly from the tool after passing through the tube.
At the front~end of the nose piece 18, a ~ubstantially cylindrical hollow chuck 38 is provided to hold a collar.
As the chuck 38 resiliently pre6ses the side~ of the co~lar, the chuck comprises at least two circumferentially split portions. On the periphery of the chuck, a ring 39 of a resilient or ela~tic material is mounted to assemble the entire chuck into a cylindrical shape. As the ring 39, a leaf spring shaped like a ring, a ring of an elastic material such as rubber, or one in the form of a coil spring can be used. The chuck is capable of engaging with the side of the collar resiliently since the split chuck portions are a~embled by means of the ring 39. A front end 40 and a rear end 42 of the cylindrical chuck 38 are made smaller in the inner diameter than the outer diameter of a flange 43 formed on the front end o~ the nose piece is with the mid portion of the chuck being larger than the 6 d ld3a lN31~d a~a W~!Z: 80 56, I Z 2~dt~
214757~
outer diameter of the flange 43. Accordingly, the chuck 38 is connected movably with respect to the nose piece 18.
The chuck 38 is pushed to a front position ~urther ~orward than the front end of the nose piece 18 so as to resiliently hold the sides of the collar at a position apart from the nose piece 18. For this purpose, on the rear end portion 42 of the chuck, an annular washer 44 of substantially the same size as the chuck 38 is mounted. A
plurality of pins 46 are fixed to the washer 44 so that the pins are appropriately spaced apart from each other and extend rearwardly. On the front end of the nose housing 15, a plurality o~ slits 47 extend rearwardly with the slits being spaced apart from each other. The rear ends of the pins 46 are in contact with a shoulder 48 o~ the jaw case 19. As stated earlier the jaw case 19 is pushed out forwardly by the coil spring 28. Thus, the chuck 38 is pushed out forwardly.
With re~erence to Figures 2 through 5, explanation is now made with regard to the operation of attaching a component to a panel by swaging a collar to a bolt standing on the panel by the use of the swaging tool 10 having the above structure. In Figure 2, a threaded bolt 51 is attached to a panel 50 by welding or some other means so as to stand on the panel. In the middle of the bolt 51 heightwise, a small-diameter portion is formed as a breakable portion 52. A component 54 of which a hole is penetrated by the bolt S1 is placed on the panel 50. A
collar 56 to be fastened to the bolt 51 projecting from the component 54 is inserted in and held resiliently by the chuck 38 of the swaging tool 10. The collar 56 comprises a flange 58, a hexagonal portion 59 and a cylindrical small-diameter portion 60, all of which are molded integrally, so as to be removed after fastened to the bolt 51 and to be re-used. Under a condition that the collar 56 is held by the chuck 38, the nose piece 18 engages with the small-diameter portion 60 of the collar 56.
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21~7572 Since the ~ollar 56 is held by the chuck 38 of the swaging tool 10, the bolt 51 can be inserted into the collar 56 simply by aligning the front end of the swaging tool 10 with the end of the bolt 51 and pressing the tool onto the panel 50. Thi9 totally eliminates the need for the collar to be pre-set on the bolt. When the swaging tool 10 is pressed onto the panel 50, the bolt 51 is fitted into the collar 56 as shown in Figure 3. When the bolt 51 i~ fitted into the collar 56, an end portion of the bolt 51 projecting ~rom the collar 56 is inserted between a pair of jaws lh and directly gripped by them. Therea~ter, when a switch (not illustrated~ is pressed, pressurized fluid is fed from the pipe 27 into the front chamber 26 of the cylinder 23, and the piston 24 resiliently biased forwardly by means of the coil spring 28 is strongly retracted. The retraction ~orce causes the piston 24 to retract the piston rod 22, the rod 20 and the jaw 19 strongly. Following the retraction of the jaw case, the jaws 16, 16 are retracted so as to pull out the end of the bolt 51 gripped by them.
Reaction to the bolt pulling force of the jaws 16 causes the nose piece 18 to be pushed forward strongly to diametrically reduce the small-diameter portion 60 of the collar 56 in contact therewith. The bol~ pulling force of the jaws 16 i~ so high that the bolt 51 is broken at its breakable portion 52. According to this high pulling force, the nose piece 18 reduces the inner diameter of the small-diameter portion 60 of the collar 56 to fit the threaded surface of the bolt 51. Thus, the collar 56 is fastened to the bolt 51. In Figure 4, the piston 24 is retracted and the bolt i5 broken.
In Figure 4, the piston 24 is retracted by means of pres6urized fluid fed from the pipe 27. Following the reaction of the pi~ton 24, the piston rod 22, the connection rod 20, the jaw case 19 and the jaws 16 are retracted together with a broken end portion 62 o~ the bolt. As the shoulder 48 of the jaw case is retracted it is no longer in contact with the ends of the pins 46 ~-d ld3a 11~131~d a~a W~82:8~ S6, ~Z dd~
extending from the rear end sur~ace of ~he chuck 38 to allow the nose piece 18 to move forward relative to the chuck 38 so that the nose piece 18 forwardly lengthens the diametric reduced portion of the collar 56. After the S collar 56 is fastened to the bolt 51, the switch is released to recover the pressurized fluid fed to the cylinder 24 back to a reservoir (not illu9trated) formed in the handle 11 via the pipe 27. By the returning force of the coil spring 28, the piston rod 22, the connection rod 20, the jaw case 19 and the jaws are returned forwardly.
This return operation beings the front end of the jaw case 19 into contact with the front end of the small-diameter portion 60 of the collar 56 to push out the collar . . .
forwardly and retract the nose piece 18 from the collar 56, allowing the swaging tool 10 to ~e detached from the collar 56. On the other hand, the shoulder 48 of the jaw case 19 comes into contact with the pin~ 46 extending from the rear end of the chuck 38 to push out the chuck 38 forwardly.
Figure 5 shows the swaging tool 10 detached from the collar Z0 56.
In Figure 5,~the diametrically reduced small-diameter portion 60 of the collar 56 is fastened to the bolt 51, standing on the panel 50 to thereby attach the component 54 to the panel 50. The collar 56 ~hus fastened functions as a nut so that it can be rotated for removal and reu~e by reaction of the hexagonal portion 58 with a tool. ~he broken portion 62 of the bolt, gripped by the jaws 16, is moved rearwardly in the tool through the tube 36 under influence of a negative pressure fed to an outlet 63 at the rear end of the tool 10 to discharge the broken portion 62 from the outlet 63. A container (not illustrated) is attached to the outlet to collect bolt broken portions.
The bolt engagement surfaces o~ the jaws 16 are toothed so as to receive and grip the bolt easily but not to allow it to be pulled out. The broken bolt portion 62 can be discharged easily after the jaws are opened.
Z~-d ld3a lN31~d a~a ~82:80 56, ~2 dd~
As stated above, the collar 56 i~ held by the tool simply by inserting the collar into the chuck 38 of the swaging tool lo. The next step is al~o easy in that the bolt 51 is fitted into the collar 56 simply by aligning the collar 56 held by the tool with the end of the bolt 51 and pressing the tool onto the panel. Thereafter, simply pressing the switch reduces the diameter of the small-diameter portion 60 of the collar to fasten the collar to the bolt thereby to attach the component 54 to the panel Figures 6 and 7 show a second embodiment of a swaging tool. This embodiment has no pins on the rear end of the chuck 38. Instead, a coil spring 66 is po~itioned between the rear end o~ the chuck 38 and the shoulder 64 of the nose housing 15. Therefore, the chuck 38 is resiliently biased so a~ to be cons~antly pushed out forwardly. When the tool iq actuated, as shown in Figure 7, the nose piece 18 overcomes the biasing force of the coil sprin~ 66 to push the collar 56 forwardly to reduce the diameter of the collar 56 to fasten it to the bolt 51, 90 that the component 54 is attached to the panel 50.
Figures 8 and 9 show a third embodiment of a swaging tool. Since a collar 67 iB not formed with a hexagonal portion in this embodiment, a chuck 68 i9 ~ormed to be shorter in axial length than the chuck 38 of the first embodiment. The front end of the chuck is smaller in the inner diameter. The inner surface of the nose piece 18 may be formed in a hexagonal configuration to reduce the collar 67 diametrically to shape it into a hexagon. The coil spring 66 is positioned in the sa~e manner as the second embodiment to resiliently bias the chuck 68 to be always pushed out forwardly. The collar 67 is inserted into the chuck 68 to hold the collar in the chuck. When the tool is ac~uated, as shown in Figure 9, the nose piece 18 is pre~sed forwardly to reduce the collar 56 dia~etrically to fasten it to the bolt S1. Thus the component 54 is attached to the panel 50.
8~'d 'ld3a lN31~d a~a 1~ 6z:80 S6, IZ ;~dtl 2147~72 Figures 10 and 11 show a fourth embodiment of a swaging tool. In a collar 70 of this embodiment, the difference between the diameter9 of a hexagonal portion 71 and a ~mall-diameter portion 72 is relatively small to hold the small-diameter portion 72 by a chuck 74. In thi~ case, the chuck 74 is formed to be short in axial length. Thus, a rear end portion 72 of the small diameter portion o~ the chuck 74 i8 received in a groove defined by the flange 43 of the nose piece 18 and a small-diameter portion 75 in a front end portion of the nose housing, and the rear end portion of the chuck is sandwiched between the flange 43 of the nose piece and a shoulder 78 of the housing to attach the chuck 74 to the front end of the tool. In this embodiment, the chuck 74 is fixedly connected to the nose piece 18. AS shown in Figure 11, when the tool is actuated, the nose piece 18 presses the chuc~ 74 so as to open the front end of the chuck 74 to reduce the diameter of the collar to attach the collar 70 to the bolt 51 so that the component 54 is mounted on the panel 50.
Figures 12 and 13 show a fifth embodiment of a swaging tool. In this embodiment, the axial length of a chuck 79 i~ further reduced. The front portion 82 of a noqe piece 80 projects forwardly. The rest of its structure is substantially the same a-~ that of the third embodiment.
Like the third embodiment, the collar 67 is formed with no hexagonal portion. In this case, the inner surface of the nose piece 80 may be formed in a hexagonal cQnfiguration to reduce the collar 67 diametrically into a hexagon. The coil spring 66 is positioned between the rear end of the chuck and the shoulder of the nose housing. As shown in ~igure 13, when the tool is actuated, the nose piece 80 is pressed forwardly and the front end surface of the front portion 82 of the nose piece 80 is aligned with the front end of the chuck 79 in the same plane. Accordingly, a portion of the collar 67 to be reduced diametrically is longer so that the collar i~ fastened to the bolt 51 through a longer engagement surface. The configurations of t7~ d ld3a lN31~d a~ 6z:80 56, ~2 ;~ldt~
21~7572 the chuck and the nose piece of the ~ifth embodiment can be used al~o in the embodiment ~hown in Figures 10 and 11.
Figure~ 14 and 15 show a sixth embodiment of a swaging tool. In this embodiment, a chuck 3~ is formed integrally with a nose piece 84. The chuck 83 and the no~e piece 84 are integrally molded into a cylinder. A resilient ring 86 i~ mounted on the periphery of the chuck 83. The chuck and the nose piece are shaped to be substantially cylindrical.
In order to hold the collar easily, on the outer periphery of the chuck 83 and the inner surface the resilient ring 83, one or more holes are formed at an appropriate point or points and a small ball or balls 87 is received in the one or more hole~. This remarkably facilitates the holding of the collar. The ball 87 is preferably substituted with a small roller. In order to prevent the nose piece 84 from opening when the collar i5 diametrically reduced, the periphery of the nose piece is tightly fitted in a front end portion 88 of the nose housing. The tool constructed as stated above is suitable for fastening the collar 70, shown in Figures 10 and 11, having a small difference between the diame~ers of the hexagonal portion 71 and the small-diameter portion 73. As shown in Figure 15, when the tool iæ actuated, the nose piece 84 is restricted by the front end portion 88 of the nose portion to reduce the collar 70 diametrically to fasten it to the bolt S1, so that the component 54 i9 mounted on the panel So.
In the swaging tool according to the presen~
invention, a chuck to hold a collar is positioned on the front end of the nose piece and the chuck is constructed to resiliently grip the collar. ~herefore, a bolt can be fitted into the collar attached to the swaging tool without holding the collar by hand. Even when the bolt is attached downwardly or a componen~ has to be held by one of the operator's hand~, the work is accompliqhed without difficulty. Further, in the event the mounting space is too narrow to be reached by a hand, the work can be carried out by in~erting the end of the tool into the space.
5~ d ld3a lN31tld a~a W~0E :80 S6, ~Z ;~d~
Referring to Figures 16 and 17 in the housing 12, a tube 36 i9 connected to the rear ends of the jaws 16, 16.
The tube discharges a broken portion of the bolt to a rear portion of the housing. In the rear of the tube, releasing means are provided for moving the tube rearward~y to move the pair of jaws 16, 16 independently of the jaw case so as to release their grip on the bro~en portion.
Preferably, the jaw case l9 is connected with a piston 24 which is reciprocated in a cylinder 23 formed in the rear portion of the housing. A ~topper 31 is mounted in the tube. The releasing means comprises a collar 90 which engages the stopper, and a slide 91 connected to the collar and having a portion thereof projecting through a pair of slits 92 in the housing. The slide 91 is moved along the slits in the housing to move the collar 80 into abutment with the stopper 31 to move the stopper rearwardly so as to move the tube 36 rearwardly. The tube retracts the jaws 16, thus allowing them to expand in the rear portion of jaw case 19. This minimizes the grip force of the jaws to release the end portion of a bolt.
In this way a swaging tool is provided, wherein even after the rod member engages with the jaws, the swaging tool is capable of easily releasing the engagement.
A particular feature of the nose piece of the present invention will now be discussed. The nose of the swaging tool allows the u~e of short bolts and also allows a nose piece to be re~laced with another easily.
As referred to above, the nosepiece reduces the engaged portion of the collar radially inwardly. A rear portion of the nose piece 18 i9 externally threaded while a front end portion of the housing is internally threaded for screwing the externally threaded portion o~ the nose piece 18 thereinto. The nose piece and the housing are connected to one another by screwing. Thus, the nose piece 3~ may be readily exchanged if needed to accommodate a differently configured bolt or a different installation.
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214 7~ 72 In Figure 18 there is shown a jaw case in which the outer portion of the jaw case 19 is formed in a stepped configuration 100, 102 which i8 slim towards the front end thereof.
The rear portion 110 of the nosepiece is externally threaded at 108 while the ~ront end portion 104 of the housing is internally threaded 106.
In Figure 19 there i~ shown a tip portion of a swaging tool in which the rear portion of the nosepiece extends rearward to ~urround a jaw case 19 and has an enlarged diameter portion. The rear and inner portion 112 o~ the - nosepiece is internally threaded while the front end and outer portion 114 of the housing is externally threaded.
The ou~er portion 116 of the jaw case 19 is tapered so that it i8 slim toward the front end thereof.
Both of the~e designs allow the use of the tool of the present invention in ~ituations where the space available is constricted.
The following claims are intended to cover all variation~ which fall within the spirit and scope of this in~ention.
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Background of the In~ention The present invention relates to a swaging tool for use in attaching a component to a panel having a standing bolt which pas~es through a hole of the co~ponent placed on the panel wherein a collar is attached to a portion of the bolt projeGting from the component and a portion of the collar i9 radially inwardly reduced to secure the collar to the bolt.
There is a known ~waging tool, shown in Japanese Patent Laid-Open No. 61-144415, that is used for attaching a component to a panel having a standing bolt under a condition that the component is placed on the panel with the bolt passing throu~h a hole of the component and a collar is attached to a portion of the bolt projecting from the component 80 as to radially inwardly reduce a portion of the collar to secure the collar to the bolt. Such a swaging tool has an elongated hollow housing, jaws retractably placed within the housing to grip the bolt in engagement ~ith the sides of the end portion of the bolt, and a nose piece fixedly connected to a housing front portion and extending from the jaws to engage with the outer surface of the collar, so that the jaws are retracted to pull out the end of the bolt to break a breakable portion of the bolt, to pull out the broken portion of the bolt and simultaneously to cause the nose piece to radially inwardly reduce the diameter of the collar to fasten the collar to the bolt.
To fasten a collar to a bolt by the use of the above-described s~aging tool, a component is placed on a panel in a manner that it is penetrated by the bolt and the projecting portion of the bolt i8 fitted into the collar.
Then, the nose piece of the swaging tool i~ held on the end of the bolt so as to receive it and is pressed directly onto the bolt and the received bolt is gripped by the iaws Z d ld3a lN31~d a~ bZ:80 ~6, ~z dd~
214 7~ 72 while the nose piece is brought into engagement with the collar. Next the tool is actuated to attach the collar to the bolt to mount the component on a panel. In short, the bolt has to be pre-fitted into the collar in order to ~asten the collar to the bolt. In the event the bolt is attached downwardly, however, the collar must be held by one of the operator's hands after the bolt is fitted into the collar. Since the other hand is occupied to hold and operate the swaging tool, ~uch fastening work is troublesome, If the component need~ to be held, it is inconvenient and the work i~ difficult to be accomplished by a single operator. Besides, where mounting space is too narrow to be reached by hands, the effort required to attach the collar to the bolt is alqo troublesome.
Sl .~y of the Invention According to the first aspect the present invention aims to provide a swaging tool capable of fastening a collar to a bolt even when the bolt is downwardly attached to a panel, even when the component has to be held by one of the operator's~hands or even when the mounting space is too narrow to be reached by hands.
In order to achieve the above-described object, according to a first aspect of the present invention, there is provided a swaging tool for use in attaching a component to a panel having a standing bolt which passe~ through a hole of the component placed on the panel wherein a collar is attached to a bolt portion projecting from the component and a portion of the collar i6 radially inwardly reduced to secure the collar to the bolt, the tool comprising an elongated hollow housing, jaw~ retractably placed within the housing to grip the bolt in engagement with the sides of the end portion of the bolt, and a no~e piece fixedly connected to a housing front portion extending from the jaws to engage with the outer surface of the collar, so that the iaw~ are retracted to pull out the end of the bolt, to break a breakable portion of the bolt to pull out 8 'd ld3a lN311~d a~a ~sz 80 S6, ~Z ;~d~
- ~- 21g7S72 the broken portion of the bolt and simultaneously to cause the nose piece to radially inwardly reduce the diameter of the collar portion to fasten the collar to the bolt;
characterized in that the swaging tool has a chuck positioned at the end o~ the nose piece to hold the collar being provided on the front end of the nose piece, the chuck being constructed 90 as ~o resiliently grip the side o~ the collar.
In the pre8ent invention, the chuck may be made up of circumferentially divided portions and be shaped to be sub~tantially cylindrical by an annular resilient body provided on its periphery. Each end of the cylinder has an inner diameter which is æmaller than the outer diameter of a flange on the front end of the nose piece and the chuck 15 is connected so as to move to the front of the nose piece.
In such a case, the rear end of the chuck preferably has pins attached thereto to be inserted into slits formed in the front end of the hou~ing, and the pins are urged again~t the ~houlder of a jaw caee for the jaws, the chuck being pressed out forwardly by the forwardly biased jaw case.
Alternatively, a spring may be positioned between the rear end of the chuck and the shoulder o~ the housing to press the chuck forwardly. Further, the chuck can be formed to be ~hort in axial length. The rear end of the chuck may be sandwiched between the flange of the nose piece and the ~houlder of the housing so as to ~horten the chuck in axial length. When the axial length of the chuck is ~hortened, the flange o~ the nose piece can be formed slightly behind the foremost end of the nose piece to align the flange with the foremost end of the nose piece when swaging tool iB actuated.
In the present invention, the chuck may be integrally molded with the nose piece, the resilient ring placed over the periphery of the chuck, and the chuck and the nose piece are formed sub~tantially cylindrically. In such a case, a small ball or rollers may be placed between the t7 d ld3a lN31~d a~a W~52 :80 56, ~Z ;~ldb~
inner side of the reeilient ring and the outer periphery of the chuck.
According to a second aspect of the invention, there i5 provided a swaging tool for attaching a component to a panel having a standing rod member passing through a hole of the component which is placed on the panels by pulling the rod member and breaking a projecting portion of the rod member out o~ component; the tool comprising a hollow housing, a pair of jaws retractably placed at the front end of the inner side of the housing to engage with a jaw case for retracting the jaw pair engaging the jaw grip portion of the rod member so that the jaw pair are urged to each other to grip the jaw grip portion and then to pull the iaw grip portion to break the rod member at a breakable portion of the rod member; and wherein the broken rod portion is discharged to the rear portion of the hollow housing;
characterized in that the inner portion of the housing i9 pro~ided with a tube connected to the rear ends of the jaws and extending up to the rear end of the housing so that the broken rod portion passes through the inner side of the housing and the r~ear of the tube is provided with moving means for moving the tube rearwardly to move the pair of jaws independently of the jaw case.
Preferably the jaw case in connected with a piston which is reclprocated in a cylinder formed in the rear portion of the housing; a stopper i~ mounted on the tube;
the moving mean~ comprising a collar to engage with the stopper, and a slide connected to the collar and ha~ing a portion thereof projecting from a slit of the housing outside; the slide being moved along the slit of the hou~ing to move the collar into abutment with the stopper to move the stopper rearwardly so as to move the tube rearwardly.
According to a third e~bodiment of the invention, 3~ there is provided a swaging tool for attaching a component to a panel having a standing bolt which passes through a hole of the component placed on the panel wherein a collar S d ld3a lN31~d a~ b'9Z:80 56, ~Z ;~ldl~
- ~ 21~7~72 i8 attached to a portion of the bolt projecting from the component and a portion of the collar i6 radially inwardly reduced to secure the collar to the bolt, the tool comprising an elongated hollow housing, retractable jaws placed within the hou~ing to grip the bolt in engagement with the sides of the end portion of the bolt, and a nosepiece fixedly connected to a housing front portion, to engage with the outer surface of the collar, so that the jaws are retracted to pull out the end of the bolt to break a breaka~le portion of the bolt, to pull out the broken portion of the bolt and si~ultaneously to cause the nosepiece to radially inwardly reduce the diameter of the collar portion to fa~ten the collar to the bolt;
characterized in that a rear portion of the nosepiece is threaded while a front end portion of the hou~ing is also threaded for ~crewing the externally threaded portion of the nosepiece there into.
Preferably the rear portion of the nosepiece is externally threaded while the front end portion of the housing i8 internally threaded.
Preferably tXe outer portion of a jaw case is formed in a stepped configuration which i8 slim toward the front end thereof.
Alternatively the rear portion of the nosepiece extends rearward to surround a jaw case and has an enlarged diameter portion, and the rear and inner portion of the nosepiece is internally threaded while the front end and outer portion o~ the housing i8 externally threaded.
~rief Description of the Drawings The present invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure l ie a partially sectional view o~ a first embodiment of a swaging tool according to the present invention, ~howing a principal portion in section and omitting a lower handle portion, s-d ld3~ lN31~d a~a w~sz 80 S6, ~Z dd~
Figure 2 is a partially sectional view of the swaging tool of Figure 1 holding a collar.
Figure 3 iB a partially sectional view of the swaging tool of Figure 1 holding the collar attached to a bolt, 5Figure 4 i~ a partially sectional view of the swaging tool of Figure 1 in operation, Figure 5 is a partially sectional view of the swaging tool of Figure 1 completing a fastening operation, Figure 6 is a section view of a nose housing of a 10second embodiment of a swaging tool holding a collar, Figure 7 iR a partially sectional view showing the . swaging tool of Figure 6 in operation, Figure 8 i~ a Rectional view of a hou~ing of a third embodiment of a ~waging tool holding a collar, 15Figure 9 is a partially sectional view of the swaging tool of Figure 9 in operation, Figure 10 is a sectional view of a noRe housing of a fourth embodiment of a swaging tool holding a collar, Figure 11 is a partially sectional view of the swaging 20tool of Figure 10 in operation, Figure 12 is~a sectional view of a nose housing of a fifth embodiment of a swaging tool holding a collar, Figure 13 is a partially sectional view of the swaging tool of Figure 12 in operation, 25Figure 14 is a sectional view of a nose housing of a sixth embodiment of a swaging tool holding a collar, Figure 15 is a partially sectional view of the swaging tool of Figure 14 in operation, Figure 16 is a sectional view of a swaging tool with 30the tube in an advanced position, Figure 17 is a sectional view of a swaging tool with the tube in an retracted position, Figure 18 is a sectional view of a tip portion of a swaging tool, and 35Figure 19 i~ a sectional view of a tip portion of a further embodiment of a swaging tool.
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Detailed Descri~tion o~ the Invention Figures 1 through 5 show a first embodiment of a 6waging tool 10 according to a first aspect o~ the present invention. The swaging tool 10 has a housing 12 equipped with a handle ll to be grasped by a hand. The housing 12 comprises a main housing 14 formed with a handle 11, and a nose housing lS forming an elongated main portion together with the main housing. The nose hou~ing 15 i9 connected via a screw to the main housing 14. The elongated main housing portion iB hollowed and various members are provided inside it.-On the front end of the nose housing 15, there are provided a pair of jaws 16, 16 to grip the end o~ the bolt standing on the panel, and a hollow cylindrical nose piece 18 attached to a front portion further forward than the front ends of the jaws to engage with the side of a collar to reduce the diameter of the collar to fasten the collar to the bolt. The jaws 16 are surrounded by an outer jaw case 1g. The rear end of the jaw case 19 is connected to a hollow connection rod 20 extending outwardly. The rear end of the conne~tion rod 20 is connected to a hollow piston rod 22 extending further rearwardly. The piston rod 22 extends to a cylinder 23 of the main housing 14. A
piston 24 is connected to the rod in the cylinder. When the tool is actuated, pressurized fluid or oil is fed through a pipe 27 to a front chamber 26 of the cylinder 23 to move the piston 24 rearwardly. On the periphery of the connection rod 20 connected to the jaw case 19, a coil spring 28 is provided between a front end of the connection rod and the front end of the housing 14 to push the jaw case 19 forwardly and to resiliently bias the piston 24 forwardly. The front chamber 26 in the cylinder 23 is formed to be smaller in diameter than the rest of the cylinder. When pressurized fluid is fed to the front chamber 26, the rearward movement of the piston 24 i8 stopped in a predetermined position that varies in response to the ~uantity of pressurized fluid to be fed. On the 8 d ld3a lN31~d a~a w~z :80 S6, ~Z ~d~
rear of the piston 24, an extended hollow rod 30 is formed and a stopper 31 is positioned adjacent to the rear end of the extended rod 30.
At a front end in the connection rod 20 connected to the jaw case 19, a hollow cylindrical jaw pusher 32 is placed to act upon the rear end of the jaws 16. A weak coil spring 35 is positioned between the rear end of the jaw pusher 32 and a small-diameter portion 34 in the connection rod 20 to push out the pair o~ jaws 16, 16 forwardly so that they can abut upon the inner surface of the jaw case 19. Since the coil spring 35 pushes the jaws 16 forwardly, the toothed surfaces of the jaws engage with the threaded portion of the bolt when the end of the bolt 15 is inserted between the jaw~ 16, 1~ to grip the bolt end reliably, preventing the gripped portion of the bolt from slipping off forwardly. An elongated hollow tube 36 is placed in the centre of the nose housing 15 and the centre portion of the cylinder 23 of the main housing 14 so as to allow the broken end of the bolt to be discharged rearwardly from the tool after passing through the tube.
At the front~end of the nose piece 18, a ~ubstantially cylindrical hollow chuck 38 is provided to hold a collar.
As the chuck 38 resiliently pre6ses the side~ of the co~lar, the chuck comprises at least two circumferentially split portions. On the periphery of the chuck, a ring 39 of a resilient or ela~tic material is mounted to assemble the entire chuck into a cylindrical shape. As the ring 39, a leaf spring shaped like a ring, a ring of an elastic material such as rubber, or one in the form of a coil spring can be used. The chuck is capable of engaging with the side of the collar resiliently since the split chuck portions are a~embled by means of the ring 39. A front end 40 and a rear end 42 of the cylindrical chuck 38 are made smaller in the inner diameter than the outer diameter of a flange 43 formed on the front end o~ the nose piece is with the mid portion of the chuck being larger than the 6 d ld3a lN31~d a~a W~!Z: 80 56, I Z 2~dt~
214757~
outer diameter of the flange 43. Accordingly, the chuck 38 is connected movably with respect to the nose piece 18.
The chuck 38 is pushed to a front position ~urther ~orward than the front end of the nose piece 18 so as to resiliently hold the sides of the collar at a position apart from the nose piece 18. For this purpose, on the rear end portion 42 of the chuck, an annular washer 44 of substantially the same size as the chuck 38 is mounted. A
plurality of pins 46 are fixed to the washer 44 so that the pins are appropriately spaced apart from each other and extend rearwardly. On the front end of the nose housing 15, a plurality o~ slits 47 extend rearwardly with the slits being spaced apart from each other. The rear ends of the pins 46 are in contact with a shoulder 48 o~ the jaw case 19. As stated earlier the jaw case 19 is pushed out forwardly by the coil spring 28. Thus, the chuck 38 is pushed out forwardly.
With re~erence to Figures 2 through 5, explanation is now made with regard to the operation of attaching a component to a panel by swaging a collar to a bolt standing on the panel by the use of the swaging tool 10 having the above structure. In Figure 2, a threaded bolt 51 is attached to a panel 50 by welding or some other means so as to stand on the panel. In the middle of the bolt 51 heightwise, a small-diameter portion is formed as a breakable portion 52. A component 54 of which a hole is penetrated by the bolt S1 is placed on the panel 50. A
collar 56 to be fastened to the bolt 51 projecting from the component 54 is inserted in and held resiliently by the chuck 38 of the swaging tool 10. The collar 56 comprises a flange 58, a hexagonal portion 59 and a cylindrical small-diameter portion 60, all of which are molded integrally, so as to be removed after fastened to the bolt 51 and to be re-used. Under a condition that the collar 56 is held by the chuck 38, the nose piece 18 engages with the small-diameter portion 60 of the collar 56.
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21~7572 Since the ~ollar 56 is held by the chuck 38 of the swaging tool 10, the bolt 51 can be inserted into the collar 56 simply by aligning the front end of the swaging tool 10 with the end of the bolt 51 and pressing the tool onto the panel 50. Thi9 totally eliminates the need for the collar to be pre-set on the bolt. When the swaging tool 10 is pressed onto the panel 50, the bolt 51 is fitted into the collar 56 as shown in Figure 3. When the bolt 51 i~ fitted into the collar 56, an end portion of the bolt 51 projecting ~rom the collar 56 is inserted between a pair of jaws lh and directly gripped by them. Therea~ter, when a switch (not illustrated~ is pressed, pressurized fluid is fed from the pipe 27 into the front chamber 26 of the cylinder 23, and the piston 24 resiliently biased forwardly by means of the coil spring 28 is strongly retracted. The retraction ~orce causes the piston 24 to retract the piston rod 22, the rod 20 and the jaw 19 strongly. Following the retraction of the jaw case, the jaws 16, 16 are retracted so as to pull out the end of the bolt 51 gripped by them.
Reaction to the bolt pulling force of the jaws 16 causes the nose piece 18 to be pushed forward strongly to diametrically reduce the small-diameter portion 60 of the collar 56 in contact therewith. The bol~ pulling force of the jaws 16 i~ so high that the bolt 51 is broken at its breakable portion 52. According to this high pulling force, the nose piece 18 reduces the inner diameter of the small-diameter portion 60 of the collar 56 to fit the threaded surface of the bolt 51. Thus, the collar 56 is fastened to the bolt 51. In Figure 4, the piston 24 is retracted and the bolt i5 broken.
In Figure 4, the piston 24 is retracted by means of pres6urized fluid fed from the pipe 27. Following the reaction of the pi~ton 24, the piston rod 22, the connection rod 20, the jaw case 19 and the jaws 16 are retracted together with a broken end portion 62 o~ the bolt. As the shoulder 48 of the jaw case is retracted it is no longer in contact with the ends of the pins 46 ~-d ld3a 11~131~d a~a W~82:8~ S6, ~Z dd~
extending from the rear end sur~ace of ~he chuck 38 to allow the nose piece 18 to move forward relative to the chuck 38 so that the nose piece 18 forwardly lengthens the diametric reduced portion of the collar 56. After the S collar 56 is fastened to the bolt 51, the switch is released to recover the pressurized fluid fed to the cylinder 24 back to a reservoir (not illu9trated) formed in the handle 11 via the pipe 27. By the returning force of the coil spring 28, the piston rod 22, the connection rod 20, the jaw case 19 and the jaws are returned forwardly.
This return operation beings the front end of the jaw case 19 into contact with the front end of the small-diameter portion 60 of the collar 56 to push out the collar . . .
forwardly and retract the nose piece 18 from the collar 56, allowing the swaging tool 10 to ~e detached from the collar 56. On the other hand, the shoulder 48 of the jaw case 19 comes into contact with the pin~ 46 extending from the rear end of the chuck 38 to push out the chuck 38 forwardly.
Figure 5 shows the swaging tool 10 detached from the collar Z0 56.
In Figure 5,~the diametrically reduced small-diameter portion 60 of the collar 56 is fastened to the bolt 51, standing on the panel 50 to thereby attach the component 54 to the panel 50. The collar 56 ~hus fastened functions as a nut so that it can be rotated for removal and reu~e by reaction of the hexagonal portion 58 with a tool. ~he broken portion 62 of the bolt, gripped by the jaws 16, is moved rearwardly in the tool through the tube 36 under influence of a negative pressure fed to an outlet 63 at the rear end of the tool 10 to discharge the broken portion 62 from the outlet 63. A container (not illustrated) is attached to the outlet to collect bolt broken portions.
The bolt engagement surfaces o~ the jaws 16 are toothed so as to receive and grip the bolt easily but not to allow it to be pulled out. The broken bolt portion 62 can be discharged easily after the jaws are opened.
Z~-d ld3a lN31~d a~a ~82:80 56, ~2 dd~
As stated above, the collar 56 i~ held by the tool simply by inserting the collar into the chuck 38 of the swaging tool lo. The next step is al~o easy in that the bolt 51 is fitted into the collar 56 simply by aligning the collar 56 held by the tool with the end of the bolt 51 and pressing the tool onto the panel. Thereafter, simply pressing the switch reduces the diameter of the small-diameter portion 60 of the collar to fasten the collar to the bolt thereby to attach the component 54 to the panel Figures 6 and 7 show a second embodiment of a swaging tool. This embodiment has no pins on the rear end of the chuck 38. Instead, a coil spring 66 is po~itioned between the rear end o~ the chuck 38 and the shoulder 64 of the nose housing 15. Therefore, the chuck 38 is resiliently biased so a~ to be cons~antly pushed out forwardly. When the tool iq actuated, as shown in Figure 7, the nose piece 18 overcomes the biasing force of the coil sprin~ 66 to push the collar 56 forwardly to reduce the diameter of the collar 56 to fasten it to the bolt 51, 90 that the component 54 is attached to the panel 50.
Figures 8 and 9 show a third embodiment of a swaging tool. Since a collar 67 iB not formed with a hexagonal portion in this embodiment, a chuck 68 i9 ~ormed to be shorter in axial length than the chuck 38 of the first embodiment. The front end of the chuck is smaller in the inner diameter. The inner surface of the nose piece 18 may be formed in a hexagonal configuration to reduce the collar 67 diametrically to shape it into a hexagon. The coil spring 66 is positioned in the sa~e manner as the second embodiment to resiliently bias the chuck 68 to be always pushed out forwardly. The collar 67 is inserted into the chuck 68 to hold the collar in the chuck. When the tool is ac~uated, as shown in Figure 9, the nose piece 18 is pre~sed forwardly to reduce the collar 56 dia~etrically to fasten it to the bolt S1. Thus the component 54 is attached to the panel 50.
8~'d 'ld3a lN31~d a~a 1~ 6z:80 S6, IZ ;~dtl 2147~72 Figures 10 and 11 show a fourth embodiment of a swaging tool. In a collar 70 of this embodiment, the difference between the diameter9 of a hexagonal portion 71 and a ~mall-diameter portion 72 is relatively small to hold the small-diameter portion 72 by a chuck 74. In thi~ case, the chuck 74 is formed to be short in axial length. Thus, a rear end portion 72 of the small diameter portion o~ the chuck 74 i8 received in a groove defined by the flange 43 of the nose piece 18 and a small-diameter portion 75 in a front end portion of the nose housing, and the rear end portion of the chuck is sandwiched between the flange 43 of the nose piece and a shoulder 78 of the housing to attach the chuck 74 to the front end of the tool. In this embodiment, the chuck 74 is fixedly connected to the nose piece 18. AS shown in Figure 11, when the tool is actuated, the nose piece 18 presses the chuc~ 74 so as to open the front end of the chuck 74 to reduce the diameter of the collar to attach the collar 70 to the bolt 51 so that the component 54 is mounted on the panel 50.
Figures 12 and 13 show a fifth embodiment of a swaging tool. In this embodiment, the axial length of a chuck 79 i~ further reduced. The front portion 82 of a noqe piece 80 projects forwardly. The rest of its structure is substantially the same a-~ that of the third embodiment.
Like the third embodiment, the collar 67 is formed with no hexagonal portion. In this case, the inner surface of the nose piece 80 may be formed in a hexagonal cQnfiguration to reduce the collar 67 diametrically into a hexagon. The coil spring 66 is positioned between the rear end of the chuck and the shoulder of the nose housing. As shown in ~igure 13, when the tool is actuated, the nose piece 80 is pressed forwardly and the front end surface of the front portion 82 of the nose piece 80 is aligned with the front end of the chuck 79 in the same plane. Accordingly, a portion of the collar 67 to be reduced diametrically is longer so that the collar i~ fastened to the bolt 51 through a longer engagement surface. The configurations of t7~ d ld3a lN31~d a~ 6z:80 56, ~2 ;~ldt~
21~7572 the chuck and the nose piece of the ~ifth embodiment can be used al~o in the embodiment ~hown in Figures 10 and 11.
Figure~ 14 and 15 show a sixth embodiment of a swaging tool. In this embodiment, a chuck 3~ is formed integrally with a nose piece 84. The chuck 83 and the no~e piece 84 are integrally molded into a cylinder. A resilient ring 86 i~ mounted on the periphery of the chuck 83. The chuck and the nose piece are shaped to be substantially cylindrical.
In order to hold the collar easily, on the outer periphery of the chuck 83 and the inner surface the resilient ring 83, one or more holes are formed at an appropriate point or points and a small ball or balls 87 is received in the one or more hole~. This remarkably facilitates the holding of the collar. The ball 87 is preferably substituted with a small roller. In order to prevent the nose piece 84 from opening when the collar i5 diametrically reduced, the periphery of the nose piece is tightly fitted in a front end portion 88 of the nose housing. The tool constructed as stated above is suitable for fastening the collar 70, shown in Figures 10 and 11, having a small difference between the diame~ers of the hexagonal portion 71 and the small-diameter portion 73. As shown in Figure 15, when the tool iæ actuated, the nose piece 84 is restricted by the front end portion 88 of the nose portion to reduce the collar 70 diametrically to fasten it to the bolt S1, so that the component 54 i9 mounted on the panel So.
In the swaging tool according to the presen~
invention, a chuck to hold a collar is positioned on the front end of the nose piece and the chuck is constructed to resiliently grip the collar. ~herefore, a bolt can be fitted into the collar attached to the swaging tool without holding the collar by hand. Even when the bolt is attached downwardly or a componen~ has to be held by one of the operator's hand~, the work is accompliqhed without difficulty. Further, in the event the mounting space is too narrow to be reached by a hand, the work can be carried out by in~erting the end of the tool into the space.
5~ d ld3a lN31tld a~a W~0E :80 S6, ~Z ;~d~
Referring to Figures 16 and 17 in the housing 12, a tube 36 i9 connected to the rear ends of the jaws 16, 16.
The tube discharges a broken portion of the bolt to a rear portion of the housing. In the rear of the tube, releasing means are provided for moving the tube rearward~y to move the pair of jaws 16, 16 independently of the jaw case so as to release their grip on the bro~en portion.
Preferably, the jaw case l9 is connected with a piston 24 which is reciprocated in a cylinder 23 formed in the rear portion of the housing. A ~topper 31 is mounted in the tube. The releasing means comprises a collar 90 which engages the stopper, and a slide 91 connected to the collar and having a portion thereof projecting through a pair of slits 92 in the housing. The slide 91 is moved along the slits in the housing to move the collar 80 into abutment with the stopper 31 to move the stopper rearwardly so as to move the tube 36 rearwardly. The tube retracts the jaws 16, thus allowing them to expand in the rear portion of jaw case 19. This minimizes the grip force of the jaws to release the end portion of a bolt.
In this way a swaging tool is provided, wherein even after the rod member engages with the jaws, the swaging tool is capable of easily releasing the engagement.
A particular feature of the nose piece of the present invention will now be discussed. The nose of the swaging tool allows the u~e of short bolts and also allows a nose piece to be re~laced with another easily.
As referred to above, the nosepiece reduces the engaged portion of the collar radially inwardly. A rear portion of the nose piece 18 i9 externally threaded while a front end portion of the housing is internally threaded for screwing the externally threaded portion o~ the nose piece 18 thereinto. The nose piece and the housing are connected to one another by screwing. Thus, the nose piece 3~ may be readily exchanged if needed to accommodate a differently configured bolt or a different installation.
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214 7~ 72 In Figure 18 there is shown a jaw case in which the outer portion of the jaw case 19 is formed in a stepped configuration 100, 102 which i8 slim towards the front end thereof.
The rear portion 110 of the nosepiece is externally threaded at 108 while the ~ront end portion 104 of the housing is internally threaded 106.
In Figure 19 there i~ shown a tip portion of a swaging tool in which the rear portion of the nosepiece extends rearward to ~urround a jaw case 19 and has an enlarged diameter portion. The rear and inner portion 112 o~ the - nosepiece is internally threaded while the front end and outer portion 114 of the housing is externally threaded.
The ou~er portion 116 of the jaw case 19 is tapered so that it i8 slim toward the front end thereof.
Both of the~e designs allow the use of the tool of the present invention in ~ituations where the space available is constricted.
The following claims are intended to cover all variation~ which fall within the spirit and scope of this in~ention.
~-d ld3a lN31~d a~a ~OE:80 s6, ~z dd~
Claims (17)
1. A swaging tool for use in attaching a component to a panel having a standing bolt which passes through a hole of the component placed on the panel wherein a collar is attached to a bolt portion projecting from the component and a portion of the collar is radially inwardly reduced to secure the collar to the bolt, the tool, comprising an elongated hollow housing, jaws retractably placed within the housing to grip the bolt in engagement with the sides of the end portion of the bolt, and a nose piece fixedly connected to a housing front portion extending from the jaws to engage with the outer surface of the collar, so that the jaws are retracted to pull out the end of the bolt to break a breakable portion of the bolt, to pull out the broken portion of the bolt and simultaneously to cause the nose piece to radially inwardly reduce the diameter of the collar portion of fasten the collar to the bolt;
characterized in that the swaging tool has a chuck positioned at the end of the nose piece to hold the collar being provided on the front end of the nose piece, the chuck being constructed 90 as to resiliently grip the side of the collar.
characterized in that the swaging tool has a chuck positioned at the end of the nose piece to hold the collar being provided on the front end of the nose piece, the chuck being constructed 90 as to resiliently grip the side of the collar.
2. The swaging tool according to Claim 1 characterized in that the chuck has at least two circumferentially divided portions which are combined in a general hollow cylinder by means of a resilient ring attached on the sides thereof, each of the ends of the cylinder has an inner diameter which is smaller than the outer diameter of a flange of the front end of the nose piece, and the chuck is movably connected to the front end of the nose piece.
3. The swaging tool according to Claim 2 characterized in that the rear end of the chuck has pins attached thereto to be inserted into slits formed in the front end of the housing, and the pins are urged against the shoulder of a jaw case for the jaws, the chuck being pressed out forwardly by the forwardly biased jaw case while the swaging tool is not in operation.
4. A swaging tool according to Claim 2 characterized in that a spring is positioned between the rear end of the chuck and the shoulder of the housing to press the chuck forwardly.
5. A swaging tool according to Claim 4 characterized in that the chuck is formed to be short in axial length.
6. A swaging tool according to Claim 2 characterized in that the rear end of the chuck is sandwiched between the flange of the nose piece and the shoulder of the housing so as to shorten the chuck in axial length.
7. A swaging tool according to Claim 6 characterized in that the flange of the nose piece is formed slightly behind the front end of the nose piece to align the front end of the chuck with the foremost end of the nose piece in the same plane when the swaging tool is actuated.
8. A swaging tool according to Claim 1 characterized in that the chuck is integrally molded with the nose piece, the resilient ring is placed over the periphery of the chuck, and the chuck and the nose piece are formed substantially cylindrically.
9. A swaging tool according to Claim 8 characterized in that a small ball or rollers is placed between the inner side of the resilient ring and the outer periphery of the chuck.
10. A swaging tool for attaching a component to a panel having a standing rod member passing through a hole of the component which is placed on the panels by pulling the rod member and breaking a projecting portion of the rod member out of the component; the tool comprising a hollow housing, a pair of jaws retractably placed at the front end of the inner side of the housing to engage with a jaw grip portion of the end of the rod member, and jaw case for retracting the jaw pair engaging the jaw grip portion of the rod member so that the jaw pair are urged to each other to grip the jaw grip portion and then to pull the jaw grip portion to break the rod member at a breakable portion of the rod member; and wherein the broken rod portion is discharged to the rear portion of the hollow housing; characterized in that the inner portion of the housing is provided with a tube connected to the rear ends of the jaws and extending up to the rear end of the housing so that the broken rod portion passes through the inner side of the housing and the rear of the tube is provided with moving means for moving the tube rearwardly to move the pair of jaws independently of the jaw case.
11. A swaging tool according to Claim 10 characterized in that the jaw case is connected with a piston which is reciprocated in a cylinder formed in the rear portion of the housing; a stopper is mounted on the tube; the moving means comprising a collar to engage with the stopper, and a slide connected to the collar and having a portion thereof projecting from a slit of the housing outside; the slide being moved along the slit of the housing to move the collar into abutment with the stopper to move the stopper rearwardly so as to move the tube rearwardly.
12. A swaging tool for attaching a component to a panel having a standing bolt which passes through a hole of the component placed on the panel wherein a collar is attached to a portion of the bolt projecting from the component and a portion of the collar is radially inwardly reduced to secure the collar to the bolt, the tool comprising an elongated hollow housing, retractable jaws placed within the housing to grip the bolt in engagement with the sides of the end portion of the bolt, and a nosepiece fixedly connected to a housing front portion, to engage with the outer surface of the collar, so that the jaws are retracted to pull out the end of the bolt to break a breakable portion of the bolt, to pull out the broken portion of the bolt and simultaneously to cause the nosepiece to radially inwardly reduce the diameter of the collar portion to fasten the collar to the bolt; characterized in that a rear portion of the nosepiece is threaded while a front end portion of the housing is also threaded for screwing the externally threaded portion of the nosepiece there into.
13. A swaging tool according to Claim 12 characterized in that the rear portion of the nosepiece is externally threaded while the front end portion of the housing is internally threaded.
14. A swaging tool according to Claim 13 characterized in that the outer portion of a jaw case is formed in a stepped configuration which is slim toward the front end thereof.
15. A swaging tool according to Claim 12 characterized in that the rear portion of the nosepiece extends rearward to surround a jaw case and has an enlarged diameter portion;
and the rear and inner portion of the nosepiece is internally threaded while the front end and outer portion of the housing is externally threaded.
and the rear and inner portion of the nosepiece is internally threaded while the front end and outer portion of the housing is externally threaded.
16. A swaging tool according to Claim 15 characterized in that the outer portion of the jaw case is tapered so that it is slim toward the front end thereof.
17. A swaging tool according to Claim 12 characterized in that the nosepiece has a short collar engagement and diameter-reduction portion, and the front end of the jaw extends to a portion adjacent the short collar engagement and diameter-reduction portion.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8321494A JPH07290183A (en) | 1994-04-21 | 1994-04-21 | Tightening tool |
| JP6-83214 | 1994-04-21 | ||
| JP08321594A JP3481998B2 (en) | 1994-04-21 | 1994-04-21 | Fastening tool |
| JP8321694A JPH07290371A (en) | 1994-04-21 | 1994-04-21 | Fastening tool |
| JP6-83215 | 1994-04-21 | ||
| JP6-83216 | 1994-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2147572A1 true CA2147572A1 (en) | 1995-10-22 |
Family
ID=27304156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2147572 Abandoned CA2147572A1 (en) | 1994-04-21 | 1995-04-21 | Swaging tool |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2147572A1 (en) |
-
1995
- 1995-04-21 CA CA 2147572 patent/CA2147572A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |