TOOL FOR A COIL OF A CONTINUOUS OBJECT

Abstract: A tool for a coil (1) of a continuous object (2), having a central hole (6) running axially through it. In accordance with the invention the tool comprises a central part (9) for insertion into said central hole to be activated for internal cooperation with the coil. The central part comprises an elongate body (10) defining a centre line (13), a central bearing means (14) defining an axis of rotation that coincides with the centre line of the body, a plurality of peripheral engagement members (15) distributed around said centre line and spaced from it, a carrying member (55) connected to the body (10) and carrying the engagement members (15), and one or more power members (16) to actuate the engagement members for friction engagement with the inner side of the coil to form a rotatable unit (17). The invention also relates to such a central part.

Description: Tool for a coil of a continuous object The present invention relates to a tool for a coil which is formed of a continuous flexible object and has a cylindrical outer side, a cylindrical inner side and a central hole running axially through it that is surrounded and defined by said cylindrical inner side. The present invention also relates to a central part for a coil which is formed of a continuous flexible object and has a cylindrical outer side, a cylindrical inner side and a central hole running axially through it that is surrounded and defined by said cylindrical inner side, which central part is designed for insertion into the central hole of the coil to be activated for cooperation with the inner side of the coil. EP 0 525 093 Bl describes a tool for producing a rotatable unit from a coil of an object of the type described, the coil being produced by utilizing a supporting sleeve of cardboard or boards, for instance. The boards may be separated by gaps. When the object is coiled a parcel of coils provided with sleeves and binding means for delivery to the application site where said tool is available for assembling such parcels. The sleeve ensures that the coil retains its shape when being handled. The known tool consists of a connecting rod and two annular side supports or end elements assembled at right angles thereto, provided with concentric, fixed centring elements for engagement with the inside of the coil . The tool and the coil provided with a sleeve form a unit rotatable about an axis of rotation that is defined by the connecting rod. The rotatable unit is provided with a bearing shaft that is introduced through the connecting rod, after which the rotatable unit with the bearing shaft is placed in an uncoiling trestle so that the unit is rotatably journalled on the bearing shaft. Nowadays plastic hosing is supplied in the form of coils without such a sleeve or core. In such coreless coils the inner layer of turns of the plastic hose defines the central hole running through the coil, and thus the inner side of the coil. Omission of the core reduces the cost of the coil and there is no core to take care of at the work site after the plastic hosing has been uncoiled. An example of the use of coreless coils of plastic hosing is for laying out such plastic hosing for subsequent drawing of fibre optics cable, the plastic hosing then constituting a protective casing for the fibre optic cable. The plastic hosing is normally coiled in the production plant where it is manufactured. After coiling the coil is provided with a number of binding strips running around the coil through the central hole, after which the bound coil is transported to a work site where the plastic hosing is to be laid. A tool is generally- provided at the work site, consisting of a bearing shaft in the central hole of the coil, after which the coil and its bearing shaft is placed on an uncoiling trestle and the binding strips around the coil are cut . The diameter of the bearing shaft must be slightly less than the diameter of the central hole of the coil so that the bearing shaft can be inserted into the central hole of the coil. An injurious clearance thus appears between them since the coil will slide uncontrollably on the bearing shaft during uncoiling. Uncoiling will therefore occur unevenly and in jerks, which in turn gives rise to disturbances in the uncoiling and thus undesirable interruptions. During the previous coiling procedure the central hole of the finished coil acquired a circular or substantially circular cross section. The binding means hold the layers of plastic hosing together but do not have any noticeable stabilizing effect on the roundness of the coil. Due to the lack of a supporting core, the coil is often deformed while being transported to the work site, particular if it is transported with the central hole lying horizontally, whereupon the coil is compressed so that, upon arrival at the work site, its central hole is no longer circular. Both the inside and the outside of the coil are thus non-circular. The cross section of the central hole may in certain cases be strongly elliptical or oval. Due to the rigidity of the plastic hosing it is impossible to restore the circular cross section of the central hole on site by means of mechanical force. A non-circular cross section of the central hole of the coil therefore causes additional problems during uncoiling since the diameter of the bearing shaft for such a non-circular coil must be less than the smallest diameter of the central hole. Varying clearance, seen peripherally, therefore occurs between the non-circular inner wall of the coil and the bearing shaft, thus causing the coil to jump on the bearing shaft during uncoiling, which in turn causes the coil to have an even greater tendency to slide uncontrollably on the bearing shaft. To avoid such deformation of the coil and thus to a certain extent reduce the problem of its uncontrolled sliding on the bearing shaft, attempts have been made to reinforce the binding during coiling by stopping coiling at regular intervals, applying extra binding strips through the central hole and round the layers of plastic hosing already coiled, and then continuing the coiling procedure. However this has not prevented deformation of the coil to any noticeable extent, and in any case the problem first described with such a coreless coil still remains. The extra binding strips entail increased material costs and increasing manufacturing costs for the coreless roll . The time required and cost of uncoiling also increase since this must be discontinued at regular intervals in order to cut the extra, internal binding strips, remove and collect them. The object of the present invention is to eliminate the problems mentioned above and to provide a tool that enables simple and reliable handling of a coil of a continuous flexible object, primarily in connection with uncoiling the object from the coil. The tool in accordance with the invention is characterized in that it comprises a central part for insertion into the central hole of the coil to be activated for cooperation with the inner side of the coil, which central part comprises - an elongate body having two opposite ends and defining a centre line that extends through said ends, - a central bearing means defining an axis of rotation for rotation of the tool, which axis of rotation coincides with the centre line of the body, - a plurality of peripheral engagement members distributed around said centre line and located at a distance therefrom, - a carrying member connected to the body and carrying the engagement members, and - one or more power members to actuate the engagement members in direction from said centre line and towards the inner side of the coil in order to bring the engagement members into friction engagement with the inner side of the coil to form a unit out of the central part and the coil, said unit being rotatable about said axis of rotation. The central part in accordance with the invention is characterized in that it comprises - an elongate body having two opposite ends and defining a centre line that extends through said ends, - a central bearing means defining an axis of rotation for rotation of the tool, which axis of rotation coincides with the centre line of the body, - a plurality of peripheral engagement members distributed around said centre line and located at a distance therefrom, - a carrying member connected to the body and supporting the engagement members, and - one or more power members to actuate the engagement members in direction from said centre line and towards the inner side of the coil in order to bring the engagement members into friction engagement with the inner side of the coil to form a unit out of the central part and the coil, said unit being rotatable about said axis of rotation. The invention will be described in more detail in the following with reference to the drawings. Figure 1 shows in perspective a coil of a continuous object in the form of a plastic hose, provided with strips. Figure 2 shows in perspective parts of a central part or hub-forming device of a tool in accordance with a first embodiment of the invention. Figure 3 is a view from above of the coil and the central part in accordance with Figures 1 and 2, respectively, the central part having been inserted into the central hole of the coil and being in non-active state. Figure 4 is a view from above of the coil and central part in accordance with Figure 3 , where the central part is in an active state to produce a rotatable unit. Figure 5 shows in perspective an uncoiling trestle and the rotatable unit shown in Figure 4 in position for lowering into the uncoiling trestle, the unit being provided with a bearing shaft . Figure 6 shows in perspective the uncoiling trestle, bearing shaft and the rotatable unit as shown in Figure 5, where the rotatable unit is journalled by means of the bearing shaft in the uncoiling trestle, ready for uncoiling. Figure 7 is an exploded view of a coil of plastic hosing in accordance with Figure 1, and parts of a tool in accordance with a second embodiment of the invention in starting positions to bee assembled. Figure 8 shows in perspective a rotatable unit of coil and tool parts as shown in Figure 7. Figures 9 and 10 show views from above of a central part of a tool in accordance with a second embodiment of the invention in inserted position in a coil, the central part being in non-active and active state, respectively. Figures 11 and 12 show in different perspectives a central part of a tool in accordance with a third embodiment of the invention in non-expanded state. Figure 13 shows a section of a bearing and engagement part of the central part as shown in Figure 11. Figures 14 and 15 show in different perspectives the central part shown in Figure 11 and Figure 12, respectively, in freely expanded state (with no counter-action from the coil) . Figure 16 is a view from above of a coil as shown in Figure 1 and a central part inserted therein, in non-expanded state. Figure 17 is a view from above of the coil and central part shown in Figure 16, the central part have been expanded to form a rotatable unit with the coil . Figure 1 shows schematically a coil 1 formed of a continuous, flexible object 2, without the use of a stable inner sleeve or core . After manufacture the coil 1 is provided with a plurality of binding strips 3 that hold the turns of the object 2 together during storage and transport of the coil to the application site as a parcel. The coil 1, which is thus cylindrical, has a cylindrical outer side 4, a cylindrical inner side 5 and a central hole 6 running through it which is surrounded and defined by the cylindrical inner side 5. The cylindrical inner side forms a relatively stable wall . The coil 1 also has two parallel, flat end sides 7, 8. Examples of continuous, flexible objects are cable, line, wire, wire cable, rope, cord, ribbon, chain, uninsulated conductors for electrical overhead lines and hosing, e.g. plastic hosing to protect fibre optics cable. Figure 2 shows schematically parts of a tool designed to be brought into engagement with a coil 1 of the type shown in Figure 1. The tool, intended for repeated use, comprises a central part or hub-forming device 9 for the coil 1, the central part 9 being inserted into the central hole 6 of the coil 1 to be activated for cooperation with the inner side 5 of the coil 1. In its non-activated state, therefore, the central part 9 has a cross-sectional dimension that is less than the smallest cross-sectional dimension of the central hole 6 so that the central part 9 can freely, that is to say easily and without difficulty, be inserted into and received by the central hole 6 of the coil 1. From Figures 3 and 4 it can be seen that the coil 1 is deformed so that the central hole 6 has a non-circular cross section. The inner side 5 of the coil 1 is thus not round, i.e. it is non-circular. cπ to SU & Ω rr Ω Ω Ω ι-3 Hh Ω H Ω H Ω S tr rt Φ i-> ø tr H M Ω rt tr H μ> 3 M Pi tr ι-3 cπ o X H- SU ø * o 0 u ø' 0 0 ø Φ 0 0 μ- 0 0 μ- ø 0 tr Φ O Φ σ> cπ φ I- 1 Φ 0 0" - H- CQ i Φ ø 3 Hi Φ 4 0 0 rt 3 rr μ- S ( Q ø μ- Pi Φ 0 0 u ~ S r-h P. φ H- & ) rr Hj ι-i Ω TJ Hi 3 CD rt rt SU •d 0" ø SU PJ φ Hl ^ μ- rt Hi ^ ~ * 0 μ- * : tβ t SD ^ Φ Φ Hi ^ H- μ- μ- 1 H rt Hi IQ H IQ 0 Ω 1B Hi <-• μ- o SU CQ 1 ø Ω H 0 H- rr 0 μ- H- 0 0 Ui Φ φ SU μ- rr i Φ H Hi μ> su Φ ø 3 NJ Φ φ TJ Ω Ω 0 0 rr CQ 0 CQ IQ rt tr υi ø * rr ω 3 ω 3 o Hi rt $, CQ μ- Ω μ> . tn O 0 H JU fl ) Φ CQ *« Hi Φ IQ H- ω Φ H H μ- Φ i Φ • H- 1 Hi tr I- 1 tr rt SU rt 0 0 H 01 H- CQ P. SU μ- Φ ø Φ rt ø > fu *< ø μ- μ- 3 rt i •>• Hi SU Hh Hi < 0. Hj Φ S Ω 3 Φ 0 1 ø ( Q μ- tr rt H ø μ- CQ ø Ω φ Φ Hi tr 0 su H- *< l-h 0 SU rr φ ø- Hi 0 Φ SU ø Φ Φ 0" Pi i ø Φ tr SU P. ^ Su Φ Ω Hi 0. u H- Φ i I- 1 s: 0 ø Pi tr rt ø ø 3 Φ μ- ( Q Ω 0 μ- φ 3 φ ti 0 0 3 I- 1 O l-h tr SU μ- > o t φ tQ μ- Φ Q Ω O 1 u CQ μ- ø Ti Ω ø μ- Ti & fl) tQ 3 Φ S * φ 0 3 > 0 φ Hi SU ø • rt Su 3 0 CO X ø CQ Φ rr 0 SU ø Ti Hi rt SU φ • rt IQ ø 0 Hi Hi Φ Ω μ- I- 1 0 ø H CQ Hi s Hi φ rr rr TJ sS SU ø" 0 0 ø Ω s: Φ φ φ $ μ- H{ Φ 0 CQ > i 3 i r φ rt H- H- " CQ H- cπ Φ i tr rt CQ Φ SU 3 Hi Hi φ tr μ- 0 Hi μ- φ SU Hi SU rt ( Q Φ Φ rr SU UI l- 1 S ø Φ CQ Hi 0 Φ φ rt 0 Pi CQ a !- ■ SU VD tr H- 3 t i-i ø J I- 1 rt tr 0 CQ μ- rt H- 1 0 CQ rt CQ Hi Hj rt Hi φ 0 Q 4 μ- μ- CQ & φ rt N) SU H- 0 RJ ø " Pi Hi rt μ- H 3 Φ μ- tr Hh Hi Φ rr ø rt Ω ΓT ø ø rr Φ CQ tr < ( Q O cπ Pi cπ Φ Pi rt UI Ω Φ Hj μ- Φ Hi •<: Ti φ Su 0 3 *< rr tr SU H- ø J Φ μ- - £ su 3 Φ g tr U! 0 0 SU ø 3 0 co φ Hi rt Φ Hi ø 0 X 0 φ SU ' su Φ 3 Ω rt Φ to cπ 0 Hi μ» Si *8 l-h i-i • : Φ H- H> CQ Ω μ- • l-h 0 ϊ > Φ Hi μ- μ- Φ SU m - cπ Hi rt ω Hi CQ H- t h- 1 SU rr 0 IQ 00 Φ μ- Q su Hi SU Hi 0 Φ m rt ø rt S μ- H X DO CX ) 0 O Si H- SU 0 ø Hi rr φ •<: CQ ø ø tr rt μ- $u CQ Su ) κo r μ- CQ 0 (D LQ l-h tr P> H- rt O rt ø 4 Hi μ- 0 tQ l_l. Hi 0 ø Φ ø Φ tr rr Φ ø Φ ja Φ Φ H I- 1 CQ ø' Hi »τ| Hi Φ 0) ø Hi M P. su 0 rt SU ø Φ ϋ SU su t CQ T) X ø P. O H- * 0 S μ- KD ø Hi OΛ IQ μ- tr I- 1 Su μ- h- 1 rt CD rr rt P tr H 0 Ω H 1 iQ Hi Ω l- 1 φ 0 S Φ ø μ- ^ X *1 SU Ti CQ rt Su tr Φ SU ∞ IQ Hh ^ Φ - ø O SU 0 oi Hi 3 μ- 0 3 φ tn tr μ- μ- μ- tr 0 Φ * 0 to Φ ø rr rr o CQ H- H 1 Hi rr 0 μ- H! i. φ Pi o * Q CQ TS Φ X 0 ω H 1 0 su X μ- M SU Φ Su P. H μ- s r ø Ω . I- 1 ø l- 1 Hi tr rt φ fl) ø Ti IQ ø to φ ø D <! rt •• ø u ø 4 SU CQ rr r φ *< 0 HJ ø fu su Φ 0 M rr tr m Hi *» (^ O P Pi μ- to μ- Ω rr Φ H{ <τi 0 ø Ω hh Φ H{ CQ ø Ti 0 t 0 Φ Φ Hi Hi su 0 0 •ϋ 0 H SU 3 rt μ* 0 CQ SU ϋ Ti 0 if*. • rr Ti & SU u rt μ- 0 rt ø μ- Hi Ω SU Ω Φ rt ϋ o μ- Hi H" φ su CQ 0 CQ S ) Φ X rr to 0 Ω 0 t o l-h LΠ Φ 0 φ tr Φ • ø O O μ- 0 ω SU 0 HI Φ ι-i rr H- M su 0 •<: Φ Ω Pi Hi ø IQ P Φ Ω rr rt CQ Ω rt μ- rr Hi ø J Φ J Φ H rr -~ μ- 0 1 0 μ- 0 rt φ φ H3 μ- SU ^ SU φ tr rt Φ Φ ø f-i H- SU " ø SU CD μ- Ω Ω Hh Hi P. Hi Hi Ω μ- tr Pi rt 0 CQ 0 Hi Φ - Ω 3 IQ Hj Φ μ- | Q Hi r ø μ- rt Φ Hi CQ Φ ø Φ φ μ- ϋ 0 φ rr 0 0 Ω rr Φ H- t Hi ø Hi SU Ω ø μ- rt r o ø Φ O Hi 3 ϋ 0 Φ Ω 0 U tr 0 Hi rr rt rt SU tr μ- | Q O ø- l- 1 0 3 H rt tr S ø ι ^ Φ SU CQ 0 Φ 0 4 Φ Φ 0 0 ø CQ ø" 0 I- 1 Pi μ- ø Φ μ- UI Hi μ> Φ μ- — * Ti 0 tr 0 Φ HJ rr P. u LQ tr 0 * IS IQ φ μ- Ω su ø rr U ω su rt Hh 0 rt CQ rt Ω • : φ ø * 1 ø φ Φ SU O Φ ø 1 φ Ω φ Ω t • Hi tr o 3 tr rt Hi rt H- ø Φ LQ p. TJ ø i tr iQ ø 0 rt Φ tr - μ- Hi ι-3 Φ 3 Φ tr SU H- 0 0. Φ H- M H φ IQ 0 μ- 0 IQ μ- μ> ø μ- 0 rt tr Hi Φ fu φ H H- 1 0 LQ Φ tQ ?r Φ 00 • 4 rt Pi £, ra μ- su ω Su Ω Ω CQ IQ tr rt Φ Hj - 3 Hj rr ø φ CQ ø *<; μ- rt ( Q rt Φ tr rt Φ tr 3 * μ- φ 3 H- O SU SD H3 μ- tr rt Φ su Φ ø SU 3 Φ φ φ ø ø M ra H fl) 0 • 0 - rr Φ M tr H 3 0 rr su tr φ 3 Hj LQ IV) rt 0 3 IQ i Φ • O -j Φ rt Pi rt Hi Hi h- 1 SU ' tfl D) m . σ * CQ (-3 > t * * Φ ø 0 ø * Φ φ φ ø Φ SU tr m ø * 00 rt Φ CQ i 0 Φ Φ CQ Φ H SU CQ SU to o 0 X Φ Hi cπ Hi μ- Ω Φ rt SU 0 0 0! tr 0 Hi Hi 3 Φ fi μ- 0 Ω iQ 0 Φ SU CQ μ- 0 Φ Hi Hi i φ CQ § ■ Hi 0 0 0 ■ <! LQ t fi μ- TJ Hj I μ- 0 0 - 3 CQ to 0 Φ φ> μ- £3 Hi ø Hi ø μ- rt 0 SU φ t tQ Pi Hj fi CO μ- CQ m Φ P. tr rt tr H 0 NJ Hi tr φ • 0 to μ- Φ μ- ø - tQ Hi 0 μ- Φ LQ O μ- 3 Si rt μ- ø μ- O ω ø fi ^ - μ- φ "τ| ^ rt P. μ- SU s; 0 cQ ^ 0 tr su rt 0 μ- Φ r 0 Hi SU ø Hj Φ Φ φ Φ fi r 0 fi SU tr to 0 CQ μ- φ CQ P. ø Φ μ- rt CQ rt SU rt Hi tr μ- 0 Ω tr Φ φ Pi tr t φ Ω Φ Φ 3 rt n Φ TJ rr ø ^ 0 tr 00 LQ ? Φ - su rt Φ CQ 0 CQ φ rt Φ ø 3 rt to Si Φ Φ tr UI ø φ ti CQ rr 0 μ- Ti o Hi ø 0 0 CQ X rt rt Φ Φ tr t CQ Hi Φ o U ) ) t to H H cπ o cπ o cπ o cn 0 0 φ Si en Φ rt Hi CQ 0 rt 0 0 0 rt Pi 0" Φ rt t m $u 0 rt Ti Ti rt 0 tr H{ φ rt tr CQ Φ 0 su ii Hj Hi μ- SU ø Ω Q φ CQ CO tr O su -J Hi • r H CO rt μ> £ μ- μ- cn I- 1 - 0 rr ø tr Q ø Φ ω Hj tr rt Φ tr Su 0 rt tr Φ axial dimension (height) of the coil 1 and somewhat longer than the distance between the side walls 34, 35, measured between their outer sides, so that the bearing shaft 31 has protruding end portions for suitable holders of a lifting device carrying the unit 17 and lowering it to a rotatable position in the trestle 3 . The binding strips 3 are cut when the unit 17 and bearing shaft 31 have been lowered into the trestle 32, whereupon the coil 1 will expand axially so that its end sides 7, 8 will abut the side walls 34, 35 which then form lateral supports for the coil 1. When the object 2 has been uncoiled from the central part 9, a valve in the hydraulic system is opened so that the engagement arms 15 can be swung back to their inactive starting position, e.g. manually. Alternatively the hydraulic cylinders are of the double-acting type so that the engagement arms 15 can be returned by means of hydraulic power. In an alternative embodiment (not shown) the central part 9 is provided with a bearing shaft to form its said bearing means 14, having the same dimension as the bearing shaft 31 described above. The bearing shaft in accordance with this alternative embodiment is thus rigidly joined to the tube 18 in suitable manner, e.g. a screw or bolt joint, in which case it may be advisable to arrange some form of bearing, e.g. ball or roller bearing at the ends of the bearing shaft and/or at the bottom of the recesses 36 of the trestle 32 in order to facilitate uncoiling of the object 2. The central part 9 of the tool shown in Figure 7 is similar to that in Figure 1 but also includes a central tube 38 having a hole 39 running through it. The central tube 38 extends through the tube 18, its two end portions being located outside the ends 11, 12 thereof. The central tube 38 is detachably fixed to the tube 18, e.g. by means of screw or bolt joint, so that the central tube 38 will form said bearing means 14 of the central part 9. The tool shown in Figure 7 also comprises two annular end wall elements 40, 41, each of which is provided with a hub 42 having a hole, a circular outer ring 43 with larger diameter than the coil 1, and a plurality of spokes 44 joining the outer ring 43 to the hub 42. The end wall elements 40, 41 are provided with circular centring elements 45 which are concentric with the centre of the end wall elements 40, 41. The centring elements 45 have no function in the present case. However, the advantage is that such end wall elements 40, 41 with said central tube 38 can also be used for a parcel delivered to a work site and consisting of a relatively stable sleeve as core and coil of the object, the coil being held together by binding strips passing through the sleeve, whereby the parcel is centred to the end wall elements 40, 41 by their centring elements 45 which are in engagement with the inner side of the stable sleeve. To allow the use of such end wall elements 40, 41 with centring elements 45, therefore, the swivellable engagement arms 15 of the central part 9 are bevelled at their ends on the sides facing the tube 18 as described above, the bevelling being in agreement with the profile of the opposing surface of the centring element 45. However, the engagement arm 15 shall not be in contact at the time of use so that free movement of the engagement arms 15 from their rest positions is ensured. Said central tube 38 of the tool shown in Figure 7 in this case also forms a connecting element to join the end wall elements 40, 41 to each other, which occurs after the coil 1 with binding strips 3 is lowered down around the central part 9 with the engagement arms 15 folded in, in order to rest on the one end wall element 40, and the second end wall element 41 has been placed in position above the coil 1 and the central part 9 as seen in Figure 7. The central tube 38 is thus provided with a locking member comprising a fixed locking flange (not shown) at su ti fu SU l_l. 0 φ μ- J ø su Hj Hi 0 Hi oo rr μ- fi fi 3 3 ø - 03 <! μ- CQ Hi rt O μ- su H 0 tr SU μ- rt 0 H Φ I SU φ rt H ø vo • M Ti ø Ti 0 •<; tr Hi φ μ- ι-3 Φ fu Φ Hj ø rt 0 rr tr fi ø fi tr 0 tr 0 fi Φ φ I Φ rt Φ 03 tr l- 1 rt 0 o 3 •> ■ <! Φ Φ Si ii SU Φ Hi Φ Hi ø 3 3 - 3 tr ι-3 tQ Pi tQ μ- φ 00 μ- •<; tr 0 03 SU rt SU ø Φ μ- CQ tr ø SU Φ 3 Hj rt Φ 03 0 fi Φ Φ 0 3 rr P. $u μ- P. ≤ Φ tr 0 P. ø ø SU ø φ Hi SU μ- 03 r Hi ϋ rr rt 03 ϋ P. su SU rt o su μ- CQ $u μ- μ- SU Hi Hi Ω H fi Ti rt ø 3 rt rr 3 μ- CQ Ω SU μ- tr CQ 0 <! Φ lt» 0 φ Hi 0 0 TJ KΩ 0 H rt 0 Hi μ- μ- UI rt rt Hi <! μ- Φ ø tr Ti Φ O O CQ 0 ø SU φ μ- Hi 3 rt Q φ Hi ø Ti fu Hi Φ tr Φ rt Ti μ- Q su cπ 0 tr μ- Φ tn Ω ø t fi Φ ø 0 3 μ- SU fi rt Φ fi 0 rt μ- μ- cπ SU ø φ 03 Φ 0 03 ø tr rt Φ ø I- 1 cn fi Φ rt T! φ rt ^ rt ∞ tr μ- Hj O tr 0 rr φ <! t_l. Φ Hi 0 su 0 rt o Hi ø φ rt tr tr 0 Φ rt 3 Si 0 SU μ- φ Hi £ tr 0 tQ tr 0 0 μ- φ <l rt SU tQ tr SU rt Φ tr tQ * Φ su tr Ω Φ Φ P. ø I- 1 0 3 fi φ μ- Φ Φ P. M μ- 0 0 φ ø rt P. fu rt After which the link arm systems are locked in their active positions by means of suitable locking mechanisms, including self-clinching, e.g. by the pivot pin 51 being caused to pass a straight line extending through the pivot pins 50, 52. The broken line thus represents the inner side 5 of the coil 1 which in this case is circular. The engagement members 15 of the central parts 9 described above can be folded out individually, i.e. the distance that each engagement member 15 can be folded out is independent of the other engagement member 15. Figures 11-17 show schematically parts of a tool in accordance with another embodiment of the invention. The tool is designed to be brought into engagement with a coil 1 of the type shown in Figure 1. The tool, intended for repeated use, comprises a central part or hub-forming device 9 for the coil 1, the central part 9 being inserted into the central hole 6 (see Figure 16) of the coil 1 to be activated for cooperation with the inner side 5 of the coil 1. In its non-activated state, therefore, the central part 9 has a cross-sectional dimension that is less than the smallest cross-sectional dimension of the central hole 6 so that the central part 9 can freely, that is to say easily and without difficulty, be inserted into and received by the central hole 6 of the coil 1. From Figures 16 and 17 it can be seen that the coil 1 is deformed so that the central hole 6 has a non-circular cross section. The inner side 5 of the coil 1 is thus not round, i.e. it is non-circular. The central part 9 comprises an elongate, central, stable body 10 forming a stand with two opposite ends 11, 12 and defines a centre line 13 that extends through the ends 11, 12. The central part 9 also has a central bearing means 14, a plurality of peripheral engagement members 15, a carrying member 55 and a power member 16. The CO co to to M cπ o UI o cπ o Ul Hj su Ω su 0 03 Φ Hi ii 03 0 Φ φ rt I Hj Ti CD § ■ SU μ- H- 1 H- 1 < μ- • ! O 03 tr rt Hi 0 Su CQ 0 fi tr s fi > μ- *< cπ μ> Φ oo o H- 1 0 fu SU 0 fu ø ø Hi tr fi fi 0 SU •<; μ- rt rt tr 03 Φ φ O (i μ- Hi o ø SU ø SU Φ Si rt rt fi μ- Φ fu ti rt tr tr ■ : I- 1 Ω Φ •<: SU 3 Hi Su Φ 0 Hi CQ Su TJ ■<: CQ 0 TJ μ- Φ CQ o 03 ø IQ o μ- Hi rt Hi * Φ O rt fi Hj sg 0 03 o 0 0 P. rt cπ 03 tn Φ KΩ 0 Hj . UI Ω 00 tr Ω H SU SU O Hj Ω Hi μ- Hj tr ø *< rt μ- tr ø Φ LQ co O to to 1 1 Ul o cπ o cn o cπ SU Ω CQ Ω J rt SU μ- SU rt rt 0 0 Hi H Ω Pi SU 03 tr H Φ φ Ω μ> Φ Φ cπ Hi <J tr Φ Φ 03 Hi fu 0 tr 0 rt 0 rt 03 0 tr tr 0 Hi φ tr φ φ tr su tr X 0 0 o ø ø D μ- μ- o 0 0 Φ 0 ti 0 0 o ø rt rr Φ φ rt Φ 0 03 H- 1 su <! φ Ti CQ μ- CQ CQ X su LQ tQ rt ti 3 0 CQ > ø fu rt U Hi Hj rt SU rt Ω 0 Hi μ- su s: SU SU SU φ ^ SU SU rt 3 03 LQ rt 0 φ Ω tr Ω μ- i Φ Ω 03 tr rr Ω Hi ti £ rt ø tr SU tQ tr CQ tQ ø Pi fu LQ LQ μ- Hj Ω tr Φ tr X tr Φ tr Φ μ- Φ SU μ- LQ Φ μ- φ μ> μ- Φ Φ fi ø μ> φ Φ ø SU cn rt 0 rr 3 3 φ — Φ ø 0 0 ø tr rt ^ . ^ SU ø 3 - Ω 3 3 tr o 3 3 tQ o ø" Ω α SU Φ 03 φ Si rr rt s > Hj 0 rt Φ tr 0 fu Hj Φ Φ ø" Φ Φ rt SU Φ Φ 03 i Φ r TJ tr ø (- ■ ø Ω Hj ø 0 Hi Ω i Φ 0 μ- Si ø Hi *« ø 0 0 ti su ø ø su μ- o I- 1 rt φ rr rr 0 φ SU rt rt P ) • ! rt tr ø rt SU rt r rt Hi ø rr rt μ- Hi cn Ω 0 0 φ φ 0 3 Φ H- 1 SU 0 1 φ 0 0 tQ fu Ω s: rt tr Su P. ø fu M Φ 0 Φ < Φ TJ ø q rt μ- SU ø 03 tr fu Φ tr CQ SU tr Φ ø Su 3 *« 0 SU r φ 0 Hi tr 0 SU rr tr ø Hi μ- tr φ 3 0 Hi CQ φ ø Hi φ μ- LQ μ- H Φ Hi H- 1 rt Φ Ω 0 Φ Φ ø μ- 0 Hj tr tr 0 Pi -> rt 0 Φ < 3 0 Hi 3 ti Φ 03 3 3 φ Φ ≤ Hj rt 3 cπ 3 φ CQ H P. I- 1 φ fi φ μ- 3 cn SU φ rt Hi μ- 3 ^ tr Su φ μ- SU φ φ φ tr • ! rr Φ ^ Hi φ M , Ul ø • μ 1 tr rr SU I- 1 ø Φ Φ Ω rt φ $u O μ- H 3 <! ø ø Φ cn φ tr Ω t 03 l Φ tr Ω cπ 03 ø ø SU tr Hi rr LQ Ω Φ SU tr rr CQ rt ø H μ- 0 φ H σi Hi Φ Φ •» μ- fi rt ti su μ- H{ tr rt 0 rt > μ- Pi SU T) o CQ ø ø O Φ rt 0 ø μ> Su tr Pl 03 Hi rt μ> 0 SU ø rt μ- fi cn rt cn o μ- rt H3 0 l-h ø Φ. Hi 0 Ω cn 3 φ 0 μ- Ul ø 3 Hi tr CQ O Hi -j ø n 0 tr S fu TJ rt ti μ- Hh tr ø Φ Φ co (U rt Hi φ μ- 0 φ ø ?u • fu Hh > Φ 0 ø SU CQ 0 φ Hj SU μ- μ- Φ ø P. 0 0 fi 03 μ- rr su 0 σi «» 0 rt SU fi Hj fi ti μ> ti 0 0 ø 03 μ- rt Hi Φ Hi Ω 03 0 tr Hi cn o 1-" H φ ø rt ti T) -o rt Ω rt CQ ø s: Hi SU rt O tr I- 1 Φ r μ- tr fi ϋ tr SU 3 rt O rt tr SU Φ SU ø Hi 3 SU su Ω O rt tr 3 ■ <: O CQ rr φ Ω tr Ω φ Φ ø φ tr 03 S 0 ø X ø rt 0 rt 0 SU μ- 1 μ- Hi tr φ TJ Ω tr tr 0 Hh <T\ Φ Hi tr φ φ μ- tr 03 μ- rt Φ Ω tr H ti " ø Φ Hi μ- SU su φ rt 0 Hj Q* rt • * 01 tr ø • ; Ω μ- φ $u Hi 0 Hi 3 P. Ti CQ SU 0 φ rt rt T) 0 CQ 0 Ω O • <; Hi φ Ω Φ Ω Ti tr Hi H" SU SU μ- 0 φ cπ SU Φ ø CQ 03 Φ φ Ω rt 3 φ ø fi rt μ- 0 ti φ 0 03 μ- Hi 0 P. > • Hi Su 3 ø rt CQ P. fi φ SU ϋ cπ 0 Hi Hi tr rt rt Ω 0 S- rt μ- X Pi 0 μ- LQ rr £. φ tQ 03 μ- su ø 03 ø SU Ω rt Ω su Φ CQ Hj ^ μ> rt Φ tr ø φ μ- tr ø ø tr tr tr H SU rt SU μ- tr CQ TJ rt 03 Ω ø - Hi Φ ø 03 fu n Hj Hi Φ Ω fi 03 0 0 CQ ^ Φ tr CD > < SU LQ fi CQ SU CQ Hi 0 rt SU rt Ti 1-^ μ- SU φ TJ Si Pi μ- <! Φ Φ φ φ o Hi $u 3 μ- μ- cn <! μ- μ- ø ^^ H 1 3 su su ^ P. rt SU Φ μ- Hi 3 Ω $u SU φ 0 ø to μ- Ω fu 03 rr Pi 0 Φ μ- μ- LQ SU rt Φ - Φ 03 ti 03 Φ 0 cn μ- 0 0 0 tr fu :> rt ø Φ 3 rt Pl rt SU Ω μ> tr <! Ω I- 1 ø 0 φ 0 Hi Ti Su tr fi TJ o Ω SU O tr Hi μ- 0 ' μ- Φ o Φ μ- μ- Φ φ p. μ- 3 Ω r Hi rr φ 0 0 μ- Φ φ cn fi fu ^ ^ ø Φ rt tr Φ o μ- ø 3 Ω ø ø fi 03 ø rt rr μ- Φ tr 9* Hi Hi O ; H- 1 rt Φ Hi Hi 03 CQ Φ μ- tr Φ rt rt CQ rt μ- SU tr ø i H- 1 ^ Hi Φ SU Ω μ- Hj cn rr Φ rr 0 CQ Φ 0 ti Hi 0 φ tr O i Φ tQ r 0 Φ 3 rt SU μ» 0 ø tr O Φ. tr fi cn I- 1 " rr rr u μ- Su 0 Hi ti Φ 0 3 Ω o ø μ 1 ti Φ μ- Hi o ø fi ^ fi φ Φ cn o 0 H CQ ii 03 ≤ μ- 1 ii rt Ω 3 su LQ o Φ ø <! Φ fi φ tr μ- Ω O SU μ- tr Φ Φ Ω H su Φ ti rt - • ø rt Φ SU ø ti 3 φ ^ Φ ø rt μ- IT Hi rt I- 1 μ- ø μ- μ- rt H SU fi Φ tr Ul ti Hi tr r 03 Pi ø μ- Φ ø ø 0 03 μ- O $u O P. tQ ø Ω 0 Φ Ω ø su • ii ■ <; Φ 03 t T) μ- Si rt μ 1 SU i 3 fi >τ] ø Hi rt ø su tn tr tr SU tr μ- rt CQ > < φ μ- rt SU SU rt O 03 - cn 0 φ μ- SU <_ι. LQ 3 μ- LQ tr 03 φ φ CQ ø ti Hi μ- Hi ø Ω ti Ω ø O 03 Ti rt 03 μ- SU 0 LQ Ω 0 0 H tr Hi su 0 rt SU SU tr ø 03 tQ φ SU tr tQ CQ μ- tr 0 μ- 03 0 Hi 0 rt μ- fi SU 0 rt Φ su rt n 0 0 l- 1 Φ m 0 μ- Φ rt su φ o 03 0 CQ ii ø Φ ø- Hi Φ tr Φ 03 Ω cn i rt LQ φ rt μ- Ω rt Hι Hi S Φ Φ < Ti μ- μ- 0 rt P. Φ rt tr 0 ti t 0 ii tr tr 0 Φ μ- 0 tr 03 P. μ- SU ø 03 0 SU tr 0 Hi 0 P. fu rt Φ ø P. SU X Hi μ- Ω Hi SU rt Hi φ 0 φ Ω μ> r Φ rr rr CQ 0 μ- ^ Q <! fi i Φ 03 Ul Su fi SU tr cn 0 03 tr ø P. KΩ CQ 0 Φ tQ co co t t H μ> cπ o Ul o UI o cπ Hj μ- 3 μ» ι-3 rt O Ti 03 Hj Ω KΩ rt Φ tr 03 cπ t Φ tr Ω fi SU rt tr J Ω rr Φ CQ μ- 03 03 Φ cn Φ μ- * tr o rt SU r φ 0 0 0 Φ .0 j X Hi Φ φ 0 tr Hi 0 cn Φ tr μ- X s; CQ tr tr h- 1 CQ 1 φ tr Hi Hj μ- SU CQ rt 0 TJ 0 0 LQ P. Φ O 03 ø φ rt Ti 0 O o SD su fj 1 ø" M tr φ rt 0 SU 0 su SU s rt Hi 0 Su 0 rt ti 0 μ- rt tr SU 0 Φ S rt h- 1 Φ rt -J Ω Φ Hj s 0 rt P. Ω CQ φ tr Hi 0 tQ Hi Φ * Ω tQ rt 21 ii Ω 0 ( Q ø 0 Φ 03 Hi Φ • Ω CQ μ- H tr Φ φ fu rt CQ tr Φ Φ ι Φ tr μ- tr fu φ rt fi Ti CQ O Ω μ- ø Ω O Ω μ- 3 0 rt tr rr μ- rt 03 *• 0 rt 0 Φ ø tr Φ O S3 ) μ- μ- H 0 03 rt u ι-3 SU rr ø tr 0 Φ Φ Φ tr 0 rt 0 ø rt φ P. ø ø ø 0 rt J σ μ- Hi Hj tr 0 tr Φ μ- <l ø rt su Φ ø μ- μ- fi rt Hi μ- tr i rt ϋ O Ti SU Hi Φ fi SU r μ- φ rt tr Ω 0 ø φ tr Su ø rt 0 SU su Ti φ 'T] •ri SU Su 03 $u H μ- rr O ø Φ CQ 0 Φ 0 rt Φ Ti φ rr rt tr -> cn 0 rt P- μ- μ- tr Ω Hi φ Hj rt CQ H su su ø μ- 0 Hi 0 Φ 0 tr Φ φ 03 03 0 Q LQ 0 φ 3 0 rt Ti P. O tr rt Φ Hi Ω Hi LQ μ> 0 CQ tr φ Ti φ μ- μ- 0 rt ø fi φ Hi μ- SU rt φ tr Su $u ti 3 Φ Hi fu rr Hi CO Pi TJ 0 Ω Ω cn Su rt rt ø ti ii tr Ω Ω Hi tr SU Φ Ω tr μ- O 03 ø μ- ≤ CQ tr H{ μ- Hi O 03 Φ Hi 1 μ- tr φ Φ μ- tr SU 0 rr ■ <; rt Ω tr M • rt rt Ω μ- Φ φ μ- Su ø μ- φ 0 Ti ø O rt 0 Φ ii 03 03 3 ø su 0 SU O ø φ φ SU μ> Hj μ- rt 3 Ω rt CQ ø rt Hi rt Hi • : 0 SU φ 03 ø su P. SU tr μ- 0 o rt Ul SU φ tr Φ Ω rr CQ σ\ SU μ- Hj vo fi P. μ> μ 1 Ω μ- μ- 0 Hj Φ 0 μ- rt rt $u l- 1 ø 0 Φ μ- rt O Ω ø SU rt ti ^ φ μ- Φ μ> tr fi Ω tr 03 Φ rt tr O ≤ tr SU rt su rr ø 0 tr ø 3 μ- rt CQ tr Ω 0 tr CQ Su su Φ SU l_l. > Ω 0 μ» Φ μ- μ 1 ø TI H- 1 rt ø Φ φ 03 1 Φ $u Pi Φ μ- I- 1 U Su ø φ Hj 0 0 H Hj rt rt φ P. SU ► <; TJ SU ti rt $ TI ø cn ø i ø 0 μ- rr Ω CQ μ- Ω 0 3 -j • ø tr Hi Hi ti SU φ TI tr ø μ- O SU Ω Φ fi Si fi Ω tr Ti rr 0 tr O μ- 0 ti 0 0 rt rt 03 φ 3 ø 0 Φ φ 0 rt SU Hj 0 Φ Ul rt fi μ- SU Φ O μ- Φ μ- rt <! Ω H ø ø ø tr rt fi 03 CQ μ- ti ø tr Si rt μ- SU 00 tr Hi μ> S rt Pi μ- SU tr rt μ- Φ vo H Φ TJ SU ø P. CQ 1 φ 03 . Φ Φ φ cπ to Ω Φ H SU μ- μ 1 ø 0 Φ SU rt O rt μ> Su tQ rr μ- Ω rt (i tr μ- X Ω SU Φ ϋ 0 tr μ- ø -j CQ tr rt tr Su 0 Φ l Hj Φ 03 s μ- tr SU I- 1 23 rr rt rt 0 ø 03 ø . Q tr Hi o ø' I- 1 0 0 CQ Hi rt 3 ≤ rt μ- ti Φ φ CQ *» > < tr μ- Φ μ- μ- O Pi rt 3 rt Φ r SU Φ Hi ø Φ -o Si 3 TJ Φ tr fu Ω 0 Φ ø ø 0 ø ti φ Φ Ω Pi tr X μ- rt Φ l-h μ- Hj Ω ø Φ ø -~ ø μ- CQ tr SU tr ø W rt ø fu tr fu SU O φ ø μ- Ω Ω Hi rt Hi ø Φ rt ø Ω 1 ø SU Φ 03 φ -• S 0 < H 1 Q" fi tr 0 <! CQ SU μ- rt rt Φ O ϊ > tr μ- φ CQ rt Φ tr su ø CQ Φ μ- su tr ' fi φ 0 0 μ- μ- 1 Hl μ- tr ø Hj SU Φ Ω Pi 03 tr ≤ rt φ Hi φ Φ ø μ- μ- ø ti Ti • <: μ- O Hi TJ Hi O rt Φ Ω Ti H 1 rt O φ rt 3 rt Φ μ- tr 0 ti 3 ø 3 Hi Ω TJ SU fu Hi Ω φ Hi • ! Φ ø ti Φ H Ω μ- 3 su rr Φ Hi Ω SU Φ φ H-" CQ μ- CQ Φ rt tr Φ 0 ii μ> ø rt 0 P. Ω SU fi 0 0 μ- tQ Φ tr 0 03 CQ ø 0 φ ø Hi tr Hj rt cn SU O μ- O fi μ- l_J. φ cπ μ- ø ø SU ø Φ rt 3 μ- rt TJ cn Hj O Hi Φ Φ rt SU μ- rr O Hi ø ø s > O 0 tr μ- μ- tQ rt 0 tr TI 03 fi SU rt rt Ti O Hj ø- rt Ω o 3 tr ø Ω μ- μ- rt TI ^ 0 l_l. 3 0 SU tr tQ φ Hi tr Φ Su 0 Hj Φ Φ Hi SU Φ μ- . SU *<; Φ 03 φ Hj rt ø Hj SU Hi H 0 ø 03 IQ φ SU φ 0 Hi fi Su Pi Hi 3 tr μ- <! Pi ^ fi X £, 0 P. φ tr rt Φ H{ rr μ- 3 rr Φ CQ 3 CQ 3 UI 3 φ r su i- 1 ø Ω φ φ = ti Ω μ- μ- I- 1 o rt tr rt <! ø 3 Ω Φ fu 03 0 03 P. Φ μ- rt Hi • ; ? Φ <! CQ tr SU l- 1 rt rt μ- SU ø μ- 0 Φ tr μ- rt 03 rr Φ 0 3 H 1 Φ CQ P. ø μ- μ- 0 TJ μ- Ti Φ 0 0 tr SU CQ rt rr 03 Hi Ω φ fu TJ tr ø μ- Φ fi μ- o μ» rr rt <l tQ rt su rt O Ω Hi CQ tr μ- Ω μ- Hi Φ rt I- 1 ø ø cπ O μ- O φ tr O H 03 φ μ- 0 μ- μ- ^ rt O rt SU Hj SU Φ 0 SU CQ μ- . rt cπ rt rt ø rt 3 su μ- CQ ø 03 Ω <! μ- Φ tr ø tr O 0 ø Ti ø tr 03 0 tϋ tr SU SU rt TI 3 03 rt CQ Φ Φ CQ Φ Φ CQ rr P. rt φ b-> O LQ 0 0 c! SU rt μ- su Hj Ω ^ tr 0 SU SU μ- £ fi Ti μ j ø rt ø rt O fu ti Hi tr Hj W Hi 0 <! CQ rt Φ r μ- φ 03 0 X tr TJ 0 μ- Pi *«« O • <: ϋ O 3 Su ø μ- tQ μ- tQ μ- Φ SU 0 rt Φ S Φ 3 O Ω rt rt $u Su rt Hi φ Hh H Φ CQ μ- tr rt SU O SU ø rt ti Hj <! ø rt 3 μ- Hj tr < s Φ 03 Φ φ Φ 0 0 O φ μ- μ- ii ξ Ω μ> tr ^ Φ μ- Φ Hi μ- φ fu ø rt SU μ- tr Hi Hi • SU SU r 0 Ti 0 ø Ω su φ Ul Φ μ- 03 Hi Φ 0 CQ H- 1 tQ 03 Ω μ- O fi Ω Hj SU 0 φ Φ 03 ø 0 CO φ Ω ti • - tr SU μ- ti P. μ- tQ H ■ ; = tr 1-" ø rt 03 cn spring properties, i.e. not only to a compression spring as shown in the drawings which is compressed to different degrees depending on the resistance encountered by respective engagement arm 15 as a result of the force applied by the power member 16 and also where in the ellipse (or other non-circular shape) the engagement arm 15 is located during loading. Although the tool in accordance with the invention has been described primarily for coils with deformed central openings, the cross section deviating from circular, the tool is equally suitable for use with coreless coils with circular central holes. Furthermore, the tool is equally suitable for use with coils having a circular-cylindrical sleeve forming a core around which the object is coiled.

Claims: C L A I M S 1. A tool for a coil (1) which is formed of a continuous flexible object (2) and has - a cylindrical outer side (4) , - a cylindrical inner side (5) and - a central hole (6) running axially through it that is surrounded and defined by said cylindrical inner side (5), characterized in that the tool comprises a central part (9) for insertion into the central hole (6) of the coil (1) to be activated for cooperation with the inner side (5) of the coil (1) , which central part (9) comprises - an elongate body (10) having two opposite ends (11, 12) and defining a centre line (13) that extends through said ends (11, 12) , - a central bearing means (14) defining an axis of rotation for rotation of the tool, which axis of rotation coincides with the centre line (13) of the body (10) , - a plurality of peripheral engagement members (15) distributed around said centre line (13) and located at a distance therefrom, - a carrying member (55) connected to the body (10) and carrying the engagement members (15) , and - one or more power members (16) to actuate the engagement members (15) in direction from said centre line (13) and towards the inner side (5) of the coil (1) in order to bring the engagement members (15) into friction engagement with the inner side (5) of the coil (1) to form a unit (17) out of the central part (9) and the coil (1) , said unit being rotatable about said axis of rotation. 2. A tool as claimed in claim 1, characterized in that the central part (9) has a cross-sectional dimension at right angles to the centre line (13) that is less than the smallest cross-sectional dimension of the central hole (6) , thus allowing the central part (9) to be inserted with sufficient clearance and received in the central hole (6) of the coil (1) . 3. A tool as claimed in claim 1 or 2, characterized in that the body (10) comprises a central, axially arranged tube (18) forming a hub and having a hole (19) running through it, the carrying member (55) being rigidly joined to the tube (18) . 4. A tool as claimed in claim 3 , characterized in that the carrying member (55) comprises - two parallel end rings (20, 21) arranged concentrically with the tube (18) and perpendicular thereto, - a plurality of axial rodlike carrying elements (22) arranged at predetermined distance from the tube (18) and extending between and rigidly joined to the end rings (20, 21) , and - two groups (23, 24) of spokes (25) rigidly joined to the tube (18) , the spokes (25) in one group (23) being located within and rigidly joined to one end ring (20) and the spokes (25) in the second group (24) being rigidly joined directly to the outer, axial carrying rods (22) . 5. A tool as claimed in claim 4, characterized in that the spokes (25) in the second group (24) are rigidly joined directly to the outer, axial carrying rods (22) midway, or substantially midway along them. 6. A tool as claimed in claim 4 or 5, characterized in that each engagement member (15) is in the form of an oblong, straight engagement arm that is parallel to the tube (18) and is swivellable about its carrying rod (22) by means of a hinge (26) . 7. A tool as claimed in claim 6, characterized in that each engagement arm (15) is provided with a curved engagement surface (27) that faces away from the tube (18) and is arranged to face towards the hole wall (5) upon insertion of the centre part (9) into the coil (1) . 8. A tool as claimed in any one of claims 4-7, characterized in that the central part (9) is provided with a plurality of power members (16) , each of which is flexibly attached to its associated spoke (25) of the second group (24) of spokes (25) and to its associated swivelling engagement arm (15) , and in that the power member (16) is arranged, upon connection, to swing the engagement arm (15) from an inactive inner position to an active outer position in which the engagement arm (15) presses against the hole wall (5) of the coil (1) with a predetermined smallest force in order to obtain a friction joint therebetween that is sufficiently strong to produce said unit (17) . 9. A tool as claimed in claim 8, characterized in that the power members (16) consist of hydraulic cylinders served by a hydraulic source (29) via a common conduit (28) and arranged to be connected simultaneously to act against the inner wall (5) of the coil with the same force. 10. A tool as claimed in any one of claims 3-9, characterized in that the bearing means (14) of the central part (9) is formed by said tube (18) and in that the tube (18) is arranged to receive in its hole (19) a bearing shaft (31) of an uncoiling device (30) for sliding cooperation between opposing bearing surfaces upon rotation of the unit (17) . 11. A tool as claimed in any one of claims 3-9, characterized in that the central part (9) also comprises a central tube (38) with a hole (39) running through it, extending through the hollow tube (18) , its two end portions being located outside the ends (11, 12) of the body (10) . 12. A tool as claimed in claim 11, characterized in that said bearing means (14) of the central part (9) is formed by the central tube (38) which is detachably fixed to the tube (18) . 13. A tool as claimed in claim 11 or 12, characterized in that the tool also comprises two annular end wall elements (40, 41) that have larger diameter than the coil (1) , each of which is provided with a hub (42) , and in that the central tube (38) forms a connecting element joining the end wall elements (40, 41) together via their hubs (42) and clamping the coil (1) between them, the central tube (38) comprising locking members (46, 47) that act against the hubs (42) of the end wall elements (40, 41) . 14. A tool as claimed in any one of claims 1-8, characterized in that the power members (16) consist of link arm systems which can be hand-operated individually. 15. A tool as claimed in claim 14 in combination with any one of claims 4-8, characterized in that each link arm system comprises a handle (48) that is pivotably journalled at its inner end by means of a pivot pin (50) to its associated spoke (25) , and a link arm (49) that is pivotably journalled at its inner end by means of a pivot pin (51) to the handle (48) and at its outer end is pivotably journalled by means of a pivot pin (52) to the engagement arm (15) . 16. A tool as claimed in claim 1 or 2, characterized in that the body (10) has a hole running axially through it and comprises a tube with two coaxial sleeves (56, 57) and a plurality of assembly elements (58) distributed uniformly around the periphery of the tube/sleeves (56, 57) , and in that the carrying member (55) is pivotably joined to the assembly elements (58) . 17. A tool as claimed in claim 16, characterized in that said carrying member (55) comprises - a plurality of axial, rodlike carrying elements (59) spaced from the tube/sleeves (56, 57) , and - link arms (60, 61) that are pivotably journalled in pairs to the assembly elements (58) and the outer carrying rods (59) . 18. A tool as claimed in claim 17, characterized in that each engagement member (15) is shaped as an oblong, straight engagement arm that is located parallel to the central body (10) and is supported by its carrying rod (59) via one or more compressible spring members (62) . 19. A tool as claimed in claim 17 or 18, characterized in that the central body (10) is slidable on a first central tube (64) that also forms said bearing means (14) , and in that the central part (9) comprises a power member (16) that is joined to the central body (10) and the central tube (64) to act therebetween, the power member being arranged to displace the central body (10) along the central tube (64) in order to expand the central part (9) in radial direction by altering the angle of said link arms (60, 61) in relation to the centre line (13) . 20. A tool as claimed in claim 19, characterized in that the central part (9) also comprises a second central tube with a hole running through it, extending through the hollow first central tube (64) , its ends being situated outside the ends of the first central tube (64) . 21. A tool as claimed in claim 20, characterized in that the tool also comprises two annular end wall elements (40, 41) that have larger diameter than the coil (1), each of which is provided with a hub (42) , and in that the second central tube forms a connecting element joining the end wall elements (40, 41) together via their hubs (42) and clamping the coil (1) between them, the central tube comprising locking members (46, 47) that act against the hubs (42) of the end wall elements (40, 41) . 22. A tool as claimed in any one of claims 1-21, characterized in that the engagement members (15) are distributed uniformly around said centre line (13) and located at a predetermined distance therefrom. 23. A central part for a coil (1) which is formed of a continuous flexible object (2) and has - a cylindrical outer side (4) , - a cylindrical inner side (5) and - a central hole (6) running axially through it that is surrounded and defined by said cylindrical inner side (5), which central part (9) is designed for insertion into the central hole (6) of the coil (1) to be activated for cooperation with the inner side (5) of the coil (1) , characterized in that the central part (9) comprises - an elongate body (10) having two opposite ends (11, 12) and defining a centre line (13) that extends through said ends (11, 12) , - a central bearing means (14) defining an axis of rotation for rotation of the tool, which axis of rotation coincides with the centre line (13) of the body (10) , - a plurality of peripheral engagement members (15) distributed around said centre line (13) and located at a distance therefrom, - a carrying member (55) connected to the body (10) and supporting the engagement members (15) , and - one or more power members (16) to actuate the engagement members (15) in direction from said centre line (13) and towards the inner side (5) of the coil (1) in order to bring the engagement members (15) into friction engagement with the inner side (5) of the coil (1) to form a unit (17) out of the central part (9) and the coil (1) , said unit being rotatable about said axis of rotation. 24. A central part as claimed in claim 23, characterized in that it has a cross-sectional dimension at right angles to the centre line (13) that is less than the smallest cross-sectional dimension of the central hole (6) , thus allowing the central part (9) to be inserted with sufficient clearance and received in the central hole (6) of the coil (1) . 25. A central part as claimed in claim 23 or 24, characterized in that the body (10) comprises a central, axially arranged tube (18) forming a hub and having a hole (19) running through it, the carrying member (55) being rigidly joined to the tube (18) . 26. A central part as claimed in claim 25, characterized in that the carrying member (55) comprises - two parallel end rings (20, 21) arranged concentrically with the tube (18) and perpendicular thereto, - a plurality of axial rodlike carrying elements (22) arranged at predetermined distance from the tube (18) and extending between and rigidly joined to the end rings (20, 21) , and - two groups (23, 24) of spokes (25) rigidly joined to the tube (18) , the spokes (25) in one group (23) being located within and rigidly joined to one end ring (20) and the spokes (25) in the second group (24) being rigidly joined directly to the outer, axial carrying rods (22) . 27. A central part as claimed in claim 26, characterized in that the spokes (25) in the second group (24) are rigidly joined directly to the outer, axial carrying rods (22) midway, or substantially midway along them. 28. A central part as claimed in claim 26 or 27, characterized in that each engagement member (15) is in the form of an oblong, straight engagement arm that is parallel to the tube (18) and is swivellable about its carrying rod (22) by means of a hinge (26) . 29. A central part as claimed in claim 28, characterized in that each engagement arm (15) is provided with a curved engagement surface (27) that faces away from the tube (18) and is arranged to face towards the hole wall (5) upon insertion of the centre part (9) into the coil (1) • 30. A central part as claimed in any one of claims 26-29, characterized in that it is provided with a plurality of power members (16) , each of which is flexibly attached to its associated spoke (25) of the second group (24) of spokes (25) and to its associated swivelling engagement arm (15) , and in that the power member (16) is arranged, upon connection, to swing the engagement arm (15) from an inactive inner position to an active outer position in which the engagement arm (15) presses against the hole wall (5) of the coil (1) with a predetermined smallest force in order to obtain a friction joint therebetween that is sufficiently strong to produce said unit (17) . 31. A central part as claimed in claim 30, characterized in that the power members (16) consist of hydraulic cylinders served by a hydraulic source (29) via a common conduit (28) and arranged to be connected simultaneously to act against the inner wall (5) of the coil with the same force . 32. A central part as claimed in any one of claims 25-31, characterized in that the bearing means (14) is formed by said tube (18) and in that the tube (18) is arranged to receive in its hole (19) a bearing shaft (31) of an uncoiling device (30) for sliding cooperation between opposing bearing surfaces upon rotation of the unit (17) . 33. A central part as claimed in any one of claims 25-31, characterized in that it also comprises a central tube (38) with a hole (39) running through it, extending through the hollow tube (18) , its two end portions being located outside the ends (11, 12) of the body (10) . 34. A central part as claimed in claim 33, characterized in that said bearing means (14) is formed by the central tube (38) which is detachably fixed to the tube (18) . 35. A central part as claimed in any one of claims 23-30, characterized in that the power members (16) consist of link arm systems which can be hand-operated individually. 36. A central part as claimed in claim 35 in combination with any one of claims 25-29, characterized in that each link arm system comprises a handle (48) that is pivotably journalled at its inner end by means of a pivot pin (50) to its associated spoke (25) , and a link arm (49) that is pivotably journalled at its inner end by means of a pivot pin (51) to the handle (48) and at its outer end is pivotably journalled by means of a pivot pin (52) to the engagement arm (15) . 37. A central part as claimed in claim 23 or 24, characterized in that the body (10) has a hole running axially through it and comprises a tube with two coaxial sleeves (56, 57) and a plurality of assembly elements (58) distributed uniformly around the periphery of the tube/sleeves (56, 57) , and in that the carrying member (55) is pivotably joined to the assembly elements (58) . 38. A central part as claimed in claim 37, characterized in that said carrying member (55) comprises - a plurality of axial, rodlike carrying elements (59) spaced from the tube/sleeves (56, 57) , and - link arms (60, 61) that are pivotably journalled in pairs to the assembly elements (58) and the outer carrying rods (59) . 39. A central part as claimed in claim 38, characterized in that each engagement member (15) is shaped as an oblong, straight engagement arm that is located parallel to the central body (10) and is supported by its carrying rod (59) via one or more compressible spring members (62) . 40. A central part as claimed in claim 38 or 39, characterized in that the central body (10) is slidable on a first central tube (64) that also forms said bearing means (14) , and in that the central part (9) comprises a power member (16) that is joined to the central body (10) and the central tube (64) to act therebetween, the power member being arranged to displace the central body (10) along the central tube (64) in order to expand the central part (9) in radial direction by altering the angle of said link arms (60, 61) in relation to the centre line (13) . 41. A central part as claimed in claim 40, characterized in that it also comprises a second central tube with a hole running through it, extending through the hollow first central tube (64) , its ends being situated outside the ends of the first central tube (64) . 42. A central part as claimed in any one of claims 23-41, characterized in that the engagement members (15) are distributed uniformly around said centre- line (13) and located at a predetermined distance therefrom.

Inventors: FORSNER BO, FORSNER, BO
Applicants: FORSNER BO, ULVATOR AB, FORSNER, BO
Application year: 2001
Main classification: B65D85
IPC codes: B65H49, B65H75