The present disclosure relates to systems and methods for the assembly of industrial break-down spools.
The present disclosure relates generally to industrial break-down spools and methods of assembling and disassembling such spools. Industrial break-down spools often have two flanges and a barrel which connects the flanges. Industrial materials such as wire, cable, tubing, rope, yarn, or the like may be wound onto the barrel of the spool. The spools can be taken apart (i.e. the flanges removed from the barrel) during shipping or after use, for example, to conserve space and minimize shipping costs.
Typically, the flanges and barrel of an industrial spool twist and lock together with integral holding snaps on the flange that are very stiff in order to maintain the barrel/flange connection during winding and unwinding. To remove the flanges from the barrel, a user must lift the snaps that lock the spool parts together, often using a specialized tool to pry the snap away from the barrel because the force required to lift the snaps is greater than can be achieved manually with a finger. This is undesirable because users generally prefer to avoid purchasing, managing, and using special tools where possible. In addition, if the snap is damaged or destroyed during use, lifting with the tool, shipment, or the like, the entire flange must be discarded and replaced. The spool may be unusable in such condition.
Through ingenuity and hard work, the inventors have developed a sliding lock for engaging and maintaining an industrial breakdown spool in a locked position. The sliding lock is easily engaged and disengaged without the use of any tool and can be stored within the flange construction when not in use. In addition, extra sliding locks can be stowed within the flange in case of failure, damage, or destruction of a sliding lock. In such case, the flange does not need to be discarded or replaced—merely the lock itself is replaced.
In an embodiment, the invention comprises a locking system for a spool comprising a barrel comprising a first longitudinal end and a second longitudinal end, wherein at least the first longitudinal end comprises at least one barrel detent; a first flange removably affixable to the first longitudinal end of the barrel, wherein the first flange comprises at least one receiving location for a sliding lock, the receiving location comprising: at least one flange detent, wherein the at least one flange detent is aligned with the at least one barrel detent to form at least one track; and at least one sidewall having at least one recessed portion; and a sliding lock comprising: a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion, wherein the at least one rail is slidable in the at least one track; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; and at least one catch disposed on the at least one arm, wherein the catch is configured to slidably move into the at least one recessed portion of the flange receiving location and is restricted from moving out of the at least one recessed portion.
In another embodiment, the invention comprises a locking system for a spool comprising: a barrel comprising a first longitudinal end and a second longitudinal end, wherein at least the first longitudinal end comprises at least one barrel detent; a first flange removably affixable to the first longitudinal end of the barrel, wherein the first flange comprises at least one receiving location for a sliding lock, the receiving location comprising: at least one flange detent, wherein the at least one flange detent is aligned with the at least one barrel detent to form at least one track; and at least one sidewall having at least one recessed portion; and a sliding lock comprising: a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion, wherein the at least one rail is slidable in the at least one track; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; and at least one catch disposed on the at least one arm; wherein the locking system comprises: a first locked position wherein the at least one rail is positioned in the at least one track and the at least one catch is positioned within the at least one recessed portion; and a second unlocked position wherein the at least one rail is not positioned within the at least one barrel detent and the catch is not positioned within the recessed portion.
In yet another embodiment, the invention comprises a method for locking and unlocking a spool comprising: providing a barrel comprising a first longitudinal end and a second longitudinal end, wherein at least the first longitudinal end comprises at least one barrel detent; providing a first flange comprising at least one receiving location for a sliding lock, the receiving location comprising at least one flange detent and at least one sidewall having at least one recessed portion; removably affixing the first flange to the first longitudinal end of the barrel; aligning the at least one barrel detent with the at least one flange detent to form at least one track; providing a sliding lock comprising: a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; and at least one catch disposed on the at least one arm; slidably engaging the at least one rail with the at least one track; and sliding the sliding lock into a first locked position wherein the at least one rail is positioned in the at least one track within the at least one barrel detent and the at least one catch is positioned within the at least one recessed portion; or sliding the sliding lock into a second unlocked position wherein the at least one rail is not positioned within the at least one barrel detent and the catch is not positioned within the recessed portion.
Further, the invention is directed to a locking system for a spool comprising: a barrel comprising a first longitudinal end and a second longitudinal end, wherein at least the first longitudinal end comprises at least one barrel detent; a first flange removably affixable to the first longitudinal end of the barrel, wherein the first flange comprises at least one receiving location for a sliding lock, the receiving location comprising: at least one flange detent, wherein the at least one flange detent is aligned with the at least one barrel detent to form at least one track; and at least one sidewall having at least one recessed portion; and a sliding lock comprising: a body portion comprising a proximate end, a distal end, two sides, an outer surface and an inner surface; at least one rail disposed on the inner surface of the body portion, wherein the at least one rail is slidable in the at least one track; at least one flexible arm, wherein the at least one arm initiates near the proximate end of the body portion and extends adjacent to one of the sides of the body portion, toward the distal end of the body portion; at least one catch disposed on the at least one arm, wherein the catch is configured to slidably move into the at least one recessed portion of the flange receiving location and is restricted from moving out of the at least one recessed portion; a retaining portion extending from the distal end of the sliding lock, opposite the proximate end, wherein the retaining portion is configured to snap-fit onto a portion of a rib of the flange; and a lip extending from the proximate end of the sliding lock, opposite the distal end, wherein the lip is configured to engage with the flange within the receiving location.
In an embodiment, the sliding lock of the invention engages with an industrial spool flange and barrel. In the locked position, the sliding lock prevents the flange from rotating on the barrel and prevents disassembly of the spool. In an embodiment, the sliding lock has two rails that slide into detents in the flange and barrel, preventing flange rotation on the barrel. The sliding lock is removable and replaceable, without the need to replace the entire flange or barrel. The sliding lock is snap-fit into the flange and/or barrel in an embodiment, utilizing flexing arms and catches that lock it into place. The sliding lock can be engaged by sliding the lock radially inward (locked), with reference to the flange, and disengaged by squeezing the arms and sliding the lock radially outward (unlocked).
Depending on various factors, such as how heavy the wound media is, the industrial spool and sliding lock system may be configured for assembly in various ways, such as, for example, a flange comprising: (1) one sliding lock and no snaps (also referred to herein as locking tabs or flexible tabs); (2) one sliding lock in conjunction with a snap; or (3) two sliding locks and no snaps. If a snap is utilized, the snap may serve as a visual aid, making it easier to align the flange onto the barrel. Additionally, when the sliding lock is removed from the flange, there is a direct line of sight to the detents on the barrel, making it easier to align the flange to the barrel.
Other features of the present invention and combinations of features will become apparent from the detailed description to follow, taken in conjunction with the accompanying drawings.
For the purpose of illustrating the invention, the drawings show forms that are presently preferred. It should be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings.
The present invention relates to a breakdown spool of the type having a barrel and at least one flange formed separately from the barrel. The barrel is defined by a longitudinal axis, a substantially annular winding surface surrounding the longitudinal axis, and an insertion section formed on at least one axial end of the barrel. In one aspect of the present invention, the insertion section includes an annular ring spaced from the axial end of the barrel and projecting radially from the winding surface. The flange includes a support surface and a receiving channel formed within the support surface. The receiving channel is provided for receiving the insertion section of the barrel to form the completed spool. The receiving channel includes a first portion for receipt of the axial end of the barrel and a second portion for receiving the annular ring of the insertion section. The second portion of the channel is recessed within the support surface such that the annular ring mates with and aligns, preferably flush, with the support surface on the flange upon insertion of the axial end of the barrel into the receiving channel.
The barrel and/or flange(s) may comprise integrally molded thermoplastic material and the barrel may be substantially centrally hollow, the hollow portion defined by an inside wall of the winding surface. In a further aspect of the flange, the receiving channel within the flange may include an internal support wall, positioned to fit within the portion of the central hollow at the insertion section. The internal support wall may be formed at an inwardly directed acute angle with respect to the inside wall of the barrel when the insertion section of the barrel is secured within the receiving channel. The angle of the support wall preferably creates a space between a portion of the support wall and the inside wall of the barrel. In addition, a plurality of support tabs may be formed inwardly of the support wall for structurally stiffening the support wall.
In a further aspect of the spool, the receiving channel may include an outer wall formed at an acute angle with respect to the longitudinal axis of the barrel when the insertion section of the barrel is secured within the receiving channel. The barrel also includes an extension foot directed radially outward from the insertion section adjacent the axial end. The foot portion is located on the barrel axially outward of the annular ring. The foot preferably engages the outer wall of the receiving channel when the insertion end of the barrel is secured within the receiving channel. The fixing means portion of the locking mechanism may be formed at least partially within the foot on the barrel end, with the foot forming the notch for receipt of the protrusion on the end of the flexible tab.
In a further aspect of the spool, a plurality of spaced extension feet are provided, with each foot preferably forming a radial projection on the outer surface of the axial end of the barrel. Each extension foot projection is contemplated to fit within the space created by the projections within the receiving channel. Upon radial rotation of the barrel within the receiving channel, the projections and protrusions are contemplated to overlap and, in an embodiment, axially lock the barrel within the receiving channel. In other embodiments which will be described herein, at least one sliding lock is utilized to lock the barrel within the receiving channel.
Other features of the present invention and combinations of features will become apparent from the detailed description to follow, taken in conjunction with the accompanying drawings.
Referring to the figures, where like numerals identify like elements, there is shown an embodiment of a breakdown spool designated by the numeral 10. As generally shown in
In
In
The insertion section 22 of the barrel 12 includes an axial end portion 36 and an annular ring 38 that projects radially outward from the winding surface 16 of the barrel 12. The axial end portion 36 fits within the channel 26 and is positioned between the inner support wall 30 and the outer wall 32. The annual ring 38 is spaced from the axial end 36 of the barrel 12 and mates with support surface 20 of the flange 14.
A cross sectional view of the relative positioning of the insertion section 22 of the barrel 12 within the receiving channel 26 is shown in
As shown in
The radial projection of the ring 38 is contemplated to be greater than the projection of the foot 40 from the barrel surface 16. The top surface 46 of the ring 38 is aligned to be flush with the support surface 20 of the flange 14, creating a continuous surface. The projected tip 60 of the ring 38 conforms to a receiving edge 62 of the outer wall 32 of the receiving channel 26. The mating of the ring tip 60 with the receiving edge 62 provides axial support for the ring 38. Below the ring 38 is created an engagement space 50. In the cross section of
In
In
As shown in
As shown in the exploded view of
The above-noted locking mechanism between the flange 14 and the barrel is preferably releasable. The flexibility of the tab 48 permits the head portion 52 to move away from its engagement position within the notch 56, allowing the relative rotation of the flange 14 and the barrel 12, until the rotation causes the feet 40 to move into the area adjacent the spaced tabs 58 within the channel 26. Once the barrel feet 40 are no longer overlapping with the tabs 58, the insertion end 22 of the barrel 12 may be axially withdrawn from the channel 26 and separated from the flange 14.
The spool 10 as illustrated and described is an efficient assembly of two to three pieces and creates a bond between the barrel 12 and the flange(s) 14 that is strong enough to meet or exceed industry strength requirements. The assembly is created by rotating the barrel 12 relative to the flange(s) 14. In this embodiment, the two parts are further locked into place by the engagement of the elements of the barrel insertion section 22 and the structures within the receiving channel 26. The locking tab 48 engagement of the barrel axial end 36 may further be released for breakdown of the spool elements. Movement of the tab 48 is dependent on the flexibility of the tab. In an embodiment, disassembly may include the breaking of the tab to permit rotation and release. Due to at least this possibility, in an embodiment described below, a locking tab 48 may be utilized in combination with a sliding lock in a flange 14.
The corner defined by intersection of the winding surface of the barrel and the support surface of the flange often creates a stress concentration within known spool constructions. The stress due to normal use (and disuse) may further cause unintended failure of the assembly (or molded parts). Material fatigue in the area of the barrel/flange intersection may result in damage to the material wound on the spool or cause a snag in the winding (and unwinding) operation. In the embodiments shown, a fillet is provided at the intersection of the ring 38 and the winding surface 16 of the barrel 12. The radial extension of the ring 30 forms a start-up for the flange support surface 20 and separates the stress, which may be caused by deflection of the flange 14, from the intersection with the barrel wall 14. The angle 44 of the outer wall 32 may also serve to diminish stress concentrations. The support of the end 60 of the ring 38 by the receiving surface 62 on the flange serves to diminish stress on the ring 38. Further, the dimensional relationships of the engagement of the insertion section 22 of the barrel 12 with the receiving channel 26 of the flange preferably fix the barrel and flange to form a relatively rigid spool construction.
In
In
In
The engagement of the flexible tab 48′ on the flange 14′ with the projection 64 on the axial end 36′ of the barrel 12′ is shown in
In the invention, the locking tab 48 and/or the flexible tab 48′ described above may be substituted with or may be utilized in addition to a sliding lock system 100. For example, in an embodiment, the spool of the present invention may comprise a locking tab 48 and/or a flexible tab 48′ in a first position of a flange 14 and a sliding lock system 100 in a second position of the flange 14, as shown in
In this embodiment, the flexible tab 48′ may additionally serve as a flange-to-barrel alignment feature. That is, upon rotation, one of the projections 64 on the axial end 36′ of the barrel 12′ moves into contact with the flexible tab 48′. The flexible tab 48′ flexes to permit the projection 64 to move into alignment with the opening 68. Once aligned, the projection 64 is engaged within the opening 68 and the radial position of the barrel 12′ and the flange 14′ is fixed. Once aligned, the sliding lock 110, described below, may be inserted.
As noted above, the locking tab 48 and/or the flexible tab 48′ may be used in connection with a sliding lock system 100. One or more locking tabs and/or flexible tabs 48′ may be disposed on a flange which also comprises one or more sliding lock systems. Alternatively, the locking tab 48 and/or the flexible tab 48′ may be eliminated altogether and a single sliding lock system 100 or two or more sliding lock systems 100 may be disposed on the flange 14.
In an embodiment, the sliding lock 110 is completely removable from the flange 14 and/or barrel 12. Thus, if the sliding lock 110 is damaged or destroyed, the sliding lock 110 may be inexpensively replaced without replacement of the entire flange 14. In this embodiment, a flange 14 which comprises a sliding lock system 100 may continue to be used even if an integral locking tab 48 and/or the flexible tab 48′ becomes damaged or destroyed. In an embodiment shown in
In an embodiment, the sliding lock 110 simultaneously engages with the flange 14 and the barrel 12. In an embodiment, at least one sliding lock 110 is positioned on the flange 14 approximately adjacent the aligned axial end portion 36 of the barrel 12. If two or more sliding locks 110 are utilized, they may be positioned about the circumference of the flange 14 approximately adjacent the aligned axial end portion 36 of the barrel 12. In the locked position, the sliding lock 110 prevents the flange 14 from rotating on the barrel 12 and also prevents disassembly of the spool 10. In the unlocked position, the sliding lock 110 is disengaged from the barrel 12 (and optionally the flange 14) and the spool 10 may be disassembled.
As can be seen in
The receiving location 105 may be disposed in an offset portion 111 of the flange 14 which is elevated above a circumferential portion 109 of the flange (see
In an embodiment, the flange detents 114 may be separated by one or more flange projections 128 (see
In an embodiment, the barrel detents 66 are angled such that the sidewalls 67 of the barrel detents 66 direct inwardly. That is, the outer face of a barrel detent 66 (with reference to the interior and exterior of the barrel 12) may be wider than the inner face of the barrel detent 66. As will be understood herein, this configuration may direct the rails of the sliding lock 110 into the correct alignment. Any angle known in the art may be utilized in this embodiment. Likewise, in some embodiments, no such angle may be necessary. For example,
In this embodiment, the sliding lock 110 may be inserted into the flange receiving location 105 at an angle or in a tilted position (see
In an embodiment, the sliding lock 110 may have an outer surface 130, designed to face outwardly, away from the spool 10, and an inner surface 132, designed to face inwardly, toward the flange 14 and barrel 12, when the sliding lock 110 is engaged. In an embodiment, the inner surface 132 of the sliding lock 110 comprises at least one rail 134. In a particular embodiment, the inner surface 132 of the sliding lock 110 comprises at least two rails 134. The rails 134 may be elongated three-dimensional elements which correspond to the shape and size of the flange detents 114 and barrel detents 66 of the barrel engagement means 56. For example, the flange detents 114 and barrel detents 66 may be generally square or rectangular and the rails 134 may comprise rectangular prisms. Likewise, the flange detents 114 and barrel detents 66 may be generally triangular and the rails 134 may comprise elongated triangular pyramids. In use, the rails 134 slide into and through the track 112 created by the flange detents 114 and barrel detents 66. This rail/track connection, once the sliding lock 110 is fully engaged and locked, prevents rotation of the flange 14 separately from the barrel 12. In an embodiment, the rails 134 may initiate near the proximate end 120 of the sliding lock. In an embodiment, the rails 134 may initiate at or near the location of the rim 125 of the sliding lock 110, but on the inner surface 132 of the body 118. In an embodiment, the rails 134 may extend along the length of the sliding lock 110 and may terminate at or near the distal end 122 of the sliding lock. In an embodiment, the rails 134 extend elongate on the body portion 118, along the sides 121 of the sliding lock.
In an embodiment, the body portion 118 may comprise a finger hold 126. In this embodiment, the finger hold 126 may comprise any feature or texture which allows a user to more easily grip, hold, move, or place the sliding lock 110 into position (engage or disengage). In an embodiment, the finger hold 126 comprises a generally concave divot with a raised central portion that may be gripped between a finger and a thumb, for example. The finger hold 126 may allow a user to push or pull the sliding lock 110 along the rails 134 and track 112 or may allow a user to move the sliding lock 110 in and out of position, for use and storage.
In an embodiment, each arm 116 of the sliding lock 110 may initiate along an opposite side 121 of the proximate end 120 of the sliding lock 110 and extend along each side 121 of the body portion 118, toward the distal end 122. Each arm 116 may connect to the body portion at the proximate end 120, but may be separated from the body portion 118 along each side 121 of the body portion. Each arm 116 may have flexibility such that it is biased toward an initial extended position (shown in
In an embodiment, each arm 116 may have a catch 136. The catch 136 may be disposed on the interior surface (facing toward the body 118) or exterior surface 137 (facing away from the body 118) of the arm 116. The catch 136 may comprise any mechanism that allows movement of the sliding lock 110 in one direction (first direction D1 (see
Referring to
In an embodiment, the recessed portion 142 may be disposed within a perpendicular rib 117 which connects the circumferential rib 115 to the offset portion 111 of the flange 14. The recessed portion 142 may extend into perpendicular rib 117 and away from the flange detents 114. In an embodiment, the perpendicular rib 117 may comprise the sidewall 144.
In operation, the sliding lock 110 may be positioned as set forth in
In an embodiment (see
In another embodiment, the stops 150 may comprise hold-down feet which pass underneath the ribs 152, 154, and may secure the sliding lock 110 in position, against the flange. The channel 155 through which the stops or hold-down feet 150 pass is shown in
In an embodiment, the stops 150 may be generally rectangular and may extend inwardly from the rails 134 toward the central body 118 of the sliding lock. However, any shape or configuration which prevents radial movement of the sliding lock 110 may be utilized.
In this position (shown in
To remove the sliding lock 110, in an embodiment, a user must exert pressure on at least one of the arms 116, inwardly toward the central body 118 of the sliding lock 110. This may be a compression or squeezing pressure. As the arms 116 move inwardly, the catches 136 likewise move inwardly. Once the apex 148 of each the catches 136 moves inwardly enough such that the width of the catches 136 (from one apex to the other apex) is less than the width W2 of the portion of sidewall 144 that is positioned radially outward of the recessed portion 142, the catch 136 can be removed from the recessed portion 142 by sliding radially outwardly along the tracks 112, along the portion of sidewall 144 that is positioned radially outward of the recessed portion 142. The sliding lock 110 can then be slid further radially outwardly until it is disengaged from at least the barrel 12. The barrel 12 can then be separated from the flange 14, if desired.
In an embodiment, the stops 150 which prevent further movement of the sliding lock 110 toward the center of the flange 14 may also prevent further movement of the sliding lock 110 radially outwardly, away from the center of the flange, by contacting a rib or other portion of the flange 14 or barrel 12. For example, ribs 154 (which may comprise partial ribs approximately sized to that of the flange projections 128) are shown in FIG. 15 on the flange which may contact the outer surface 158 of the stops 150 on the sliding lock 110 to prevent further radially outward movement of the sliding lock 110. Thus, in this embodiment, the sliding lock 110 may be slidable only between ribs 152 and ribs 154, unless the sliding lock 110 is lifted out of the plane of the flange 14 by a user.
An alternate embodiment is shown in
In an embodiment, the post 320 is disposed along a beam 350. In an embodiment, the beam 350 runs perpendicular or substantially perpendicular to the ribs of the flange. In an embodiment, the ribs of the flange may be characterized as beams or vice versa. In this embodiment, the beam 350 may extend between each of the retaining members 310 when the sliding lock 110 is in the unlocked position (
In use, the retaining members 310 may allow the sliding lock 110 to be positioned in the unlocked position (see
When not in use, such as when the flange 14 and barrel 12 are disassembled, the sliding lock 110 may be stored within the flange 14. In an embodiment, the sliding lock 110 may be stored on the inner surface of the flange 14 or the outer surface of the flange. In an embodiment, the storage location 200 of the sliding lock 110 is different from the receiving location 105. In an embodiment, the storage location 200 of the sliding lock 110 is radially outward of the receiving location 105.
In an embodiment, the retaining hooks 212 may comprise any shape known in the art and may comprise one or more members that extend from the flange surface 220. In an embodiment, two retaining hooks 212 are presented for each storage location. In an embodiment, the retaining hooks 212 may comprise projections that extend outwardly from the flange surface 220 (i.e. perpendicular to the flange surface 220) and turn angularly to form a hook portion that is parallel to or approximately parallel to the flange surface 220. In an embodiment, the angle between the projection and hook portion may be about 90 degrees. In an embodiment, the hook portion retains the catch 136 such that the sliding lock 110 cannot fall away from the flange surface in a direction perpendicular to the flange surface 220.
Storage base 210 may comprise any shape known in the art. In an embodiment, storage base 210 comprises one or more members that extend from the flange surface. The storage base 210 may be disposed adjunct a rib 214 which is perpendicular to the flange surface. The storage base 210 may comprise one, two, or three members in an embodiment. In an embodiment, the storage base 210 members may generally create a square, rectangular, or trapezoid shape, in connection with the rib 214. The storage base 210 may configured to approximate the shape and dimensions of the proximate end 120 of the sliding lock 110 in an embodiment. In an embodiment, the storage base 210 may be discontinuous. For example, the storage base 210 may be disposed about the corners of the proximate end 120 of the sliding lock 110 but may be discontinuous between the corners and/or between the corners and the rib 214.
As noted above, rib 214 may comprise an opening 216 through which the sliding lock 110 may be inserted. The opening 216 may be sized and configured to receive and retain the proximate end 120 of the sliding lock 110. In an embodiment, the rib 214 retains the sliding lock 110 body portion 118 such that the sliding lock 110 cannot fall away from the flange surface in a direction perpendicular to the flange surface 220. The rib 214 may comprise a bridge positioned over the sliding lock 110 when the lock 110 is engaged with the storage location 200.
The rim 125 of the sliding lock 110 may stop upon contact with the storage base 210. The flattened portion 140 of the catch 136 prevents reverse movement of the sliding lock 110 against the retaining hooks 212. In an embodiment, the inner surface 132 of the sliding lock 110 is positioned outwardly in the storage location 200, such that the rails 134 are visible when the sliding lock 110 is in its storage position. In other embodiments, the outer surface 130 of the sliding lock may be viewable when the sliding lock 110 is in its storage location (i.e. the sliding lock 110 may be inserted such that the outer surface 130 of the sliding lock 110 is positioned outwardly).
To remove the sliding lock 110 from its storage location 200, in an embodiment, a user must exert pressure on at least one of the arms 116, inwardly toward the central body 118 of the sliding lock 110. This may be a compression or squeezing pressure. As the arms 116 move inwardly, the catches 136 likewise move inwardly. Once the apex 148 of each the catches 136 moves inwardly enough such that the width of the catches 136 (from one apex to the other apex) is less than the width W4 between the retaining hooks 212, the catch 136 can be slid outwardly. The sliding lock 110 can then be slid further radially outwardly until it is disengaged from the storage base 210 and can be removed. The sliding lock 110 can then be used as described above. See
If a sliding lock 110 is damaged or destroyed, it may be removed from the spool 10 and replaced by another sliding lock 110. The flange 14 and the barrel 12 may be reused. In an embodiment, a plurality of replacement sliding locks 110 may be stowed within a single flange 14. In an embodiment, the sliding lock 110 as described herein is surprisingly strong and can withstand high loads typically imparted on spool assemblies.
It is preferred that the structures of the present invention be formed with a minimum number of parts. Thus, in an embodiment, the completed spool may have a single barrel part, two flange parts, and a sliding lock. The spool parts are also contemplated to be injection molded from a thermoplastic material, such as styrene, an olefin or combination of polymer materials. Further, the structures of the barrel are preferably integrally molded. Each flange part is also integrally molded. The surfaces and structural elements of the molded parts are preferably arranged to allow for withdraw of the mold sections from the parts with a minimum of movements and mold sections.
The present invention has been described and illustrated with respect to a number of exemplary embodiments thereof. It should be understood by those skilled in the art from the foregoing that various other changes, omissions and additions may be made therein, without departing from the spirit and scope of the present invention, with the scope of the present invention being described by the foregoing claims.