ADJUSTMENT DEVICE FOR SPORTS IMPLEMENTS

Abstract: An adjustment device for a roller skate including a support (3) for an item of footwear (4) and at least two aligned wheels (5). The device has the peculiarity of having, between the at least two aligned wheels, a screw (6) for adjusting the interspace therebetween, as well as kinematic systems (14a, 14b) for interconnection with the support. The device allows to vary the distance between the support for the item of footwear and the axle of one or more of the aligned wheels of the skate.

Description: ADJUSTMENT DEVICE FOR SPORTS IMPLEMENTS Technical Field The present invention relates to an adjustment device for sports implements, particularly for a skate comprising a plurality of aligned wheels. Background Art Skates which have mutually aligned wheels are currently known; their use is aimed, to an increasingly specific extent, to the sports practice of speed skating or slalom. These two different specialties require the wheels of the skate to have different arrangements with respect to the support for the item of footwear: slalom in fact requires a configuration which allows to achieve a very tight radius of curvature, whereas speed skating requires a configuration which allows to achieve the straightest possible driving. Skates are thus known which have aligned wheels wherein the variation of the position of said wheels is achieved by virtue of the interaction of the ends of the pivot of each wheel with a separate eccentric element. The disadvantage which can be observed in these known types of device consists of the fact that the partial disassembly of the assembly constituted by the wheel and by the pivot is required in order to then be able to rotate the eccentric through 180° in order to achieve a different arrangement of the axle of the wheel with respect to the support of the wheel or to the ground. This all leads, therefore, to a scarce functionality and practicality of said known devices, which force the user to perform long interventions which require the use of special tools. It is furthermore possible to achieve only two different positions which are due to the two positions which the eccentric element can assume. Disclosure of the invention The aim of the present invention is therefore to eliminate the disadvantages described above in known types by providing a skate with aligned wheels in which it is possible to rapidly and easily adjust the distance between the support for an item of footwear and the axle of one or more of the aligned wheels. further aim of the present invention is to provide a skate with aligned wheels wherein it is possible to rapidly and easily adjust the distance between the sole of an item of footwear and the axle of one or more of the aligned wheels. Within the scope of this aim, an important object is to provide a device wherein the user can perform said adjustments without having to have particular- "tools available. Another object is to provide a device which allows to achieve a continuous and not discrete adjustment. Another important object is to provide a device which is structurally simple and wherein it is not necessary to disassemble the various components in order to achieve said adjustment. Not least object is to provide a device which associates with the preceding characteristics that of being reliable and safe in use. This aim, these objects and others which will become apparent hereinafter are achieved by an adjustment device for sports implements, particularly for a skate comprising a support for an item of footwear and at least two aligned wheels each having a shaft, characterized in that adjustment means are provided between said at least two aligned wheels and are suitable for simultaneously varying the interspace between said wheels and the distance between said support and the shaft of said at least two aligned wheels. Brief description of the drawings Further characteristics and advantages of the invention will become apparent from the detailed description of a preferred but not exclusive embodiment, illustrated only by way of non-limitative example in the accompanying drawings, wherein: figure 1 is a partially sectional side view of a skate according to the invention with the wheels arranged in the condition of minimum extension with respect to the frame; figure 2 is a partially sectional top view of the skate according to the line II-II of figure 1; figure 3 is a partial sectional view, taken along a longitudinal median sectional plane, of a skate according to a further aspect of the invention with the wheel arranged in the condition of minimum extension with respect to the frame; figure 4 is a view, similar to the preceding one, of an intermediate condition of the position of the wheel with respect to the frame; figure 5 is a sectional view, taken along a longitudinal sectional plane, of a third embodiment; figure 6 is a view, similar to that of figure 3, of a fourth embodiment; figure 7 is a view, similar to that of figure 3, of a fifth embodiment; figure 8 is a bottom view of a skate according to the preceding figure; figure 9 is a partially sectional side view of a sixth embodiment of the skate; figure 10 is a view- similar to that of figure 3, of a seventh embodiment; figure 11 is a cross sectional partial view of a wheel of a skate according to a further aspect of the invention, in the position of minimum distance between the sole of the item of footwear and the axle of the wheel; figure 12 is a view similar to the preceding one, in the position of maximum distance between the sole and the axle; figure 13 is a partial perspective view of the skate of figures 11-12; figure 14 is a cross sectional partial view of a wheel of a skate according to still a further aspect of the invention. Ways of carrying out the invention With reference to the above figures, the reference numeral 1 indicates an adjustment device for sports implements, particularly for a skate 2 which comprises a support 3 for an item of footwear 4 which also constitutes a frame for one or more mutually aligned wheels 5. The adjustment device 1 is interposed between two or more of said wheels 5 which are mutually adjacent, and comprises a means for adjusting both the interspace between said wheels and the distance between the support 3 and the axle of said adjacent wheels 5. Said adjustment device is constituted by a screw 6 which is provided with a head 7 which can be accessed by the user and with a stem 8 which has two distinct regions, 9a, and 9b, with opposite threads. Said two distinct regions interact with a first sleeve and with a second sleeve which are complementarily threaded and are indicated by the numerals 10a and 10b; each sleeve is rigidly associated with the concordantly orientated end of one of the two pivots, or shafts, 11 and 12 of the two adjacent wheels being considered. Kinematic systems for interconnection between two of said mutually adjacent wheels and said support also constitute the adjustment device: said systems are constituted by a first pair of connecting rods and by a second pair of connecting rods, indicated by the numerals 13a, 13b and 14a, 14b, which are freely pivoted to one another at one end at a third sleeve 15 and are pivoted to the pivots, or shafts, 11 and 12 at the other end. Said third sleeve 15 is in turn pivoted to the support 3 at its ends. Advantageously, a wall 16 is arranged laterally to the support 3, and a guiding slot 17 is defined in said wall for the sliding and movement of the first and second sleeves 10a and 10b during the activation of the screw 6. The use of the adjustment device is as follows: by gripping and turning the head 7 of the screw 6, the user forces the mutual approach or spacing of the first and second sleeves 10a and 10b; due to the presence of the first and second pairs of connecting rods, which are pivoted to the third sleeve 15 which is in turn rotatably associated with the support 3, this movement is followed by a simultaneous lifting or lowering of the screw 6. The combination of these two movements causes the lifting or lowering and, respectively, the simultaneous mutual approach or spacing of the two adjacent wheels affected by the device. With reference to figures 3-4, the adjustment device, according to a further aspect of the invention, generally indicated by the reference numeral 501, is particularly usable for a skate which comprises two or more aligned wheels 502 and an item of footwear 503. The adjustment device comprises a carriage 504 which has a substantially C-shaped configuration which defines first wings 505a and 505b between which at least one wheel 502 can be arranged by means of an adapted pivot 506 which has a head 507 which protrudes outside the wing 505b and a threaded stem 508 which protrudes outside the wing 505a, to which a complementarily threaded nut 509 can be temporarily secured. Said carriage 504 is slidingly associable inside a C- shaped frame 510 above which the item of footwear 503 is rigidly associated. The frame 510 has second wings 511a and 511b which are arranged parallel to the first wings 505a and 505b and are slightly longer than said first wings. First slots 512a and 512b are furthermore defined longitudinally on the second wings 511a and 511b, and the head 507 and the nut 509 can slide freely thereat. Means for guiding the mutual position of the carriage 504 with respect to said frame 510 are also arranged at the second wings 511a and 511b of the frame 510; said means are constituted by a pair of pivots 513a and 513b which protrude laterally outside the wings 505a and 505b of the carriage 5504 and slide within adapted second slots 514a and 514b which are defined longitudinally with respect to the second wings 511a and 511b. Resilient members, such as pads 515a and 515b, are interposed at the pivots 513a and 513b at said second slots; the function of said resilient members is to provide an elastic contrast to the movements of the carriage with respect to the frame. Between the connecting base sides of the first and second wings of the carriage 504 and of the frame 510 there are means for adjusting the mutual position thereof; said means are constituted by a screw 516 which is freely rotatably associated transversely to the frame 510 and is provided with a threaded stem 517 and with a knob 518 which can be accessed by the user. The threaded stem 517 interacts with a complementarily threaded seat defined on a slider 519 which has an essentially triangular cross-section; the inclined side of said slider is directed toward the underlying carriage 504 and interacts with an equally inclined plane 520 of a raised portion 521 which protrudes from said carriage 504. The use of the device is as follows: by gripping the knob 518, the user can impart a rotation to the threaded stem 517 of the screw 516, so as to move the slider 519. Said slider spaces or not the underlying raised portion 21 and therefore the carriage 504 from the frame 510, as can be deduced from figure 4. According to the variated embodiment of figure 5, the resilient members are interposed between the frame 410 and the carriage 404 and are constituted by a pair of springs 422a and 422b which are arranged in regions adjacent to the slider 419 and the raised portion 421 which is provided with the inclined plane 420. The presence of the pair of springs 422a and 422b allows to reposition the carriage adjacent to the frame after the slider has been pushed toward the wing lib of the frame. Figure 6 illustrates a third embodiment, wherein the adjustment device for sports implements, generally indicated by the reference numeral 101, again has a raised portion 121 provided with an inclined plane 120 which interacts with the inclined side of the slider 119; a resilient member, constituted by one or more leaf springs 122, is interposed between the carriage 104 and the frame 110. Said leaf spring is arranged transversely to the frame 110 in the interspace defined between said frame and the carriage 104; the ends of the leaf spring are sunk in the wings Ilia and 111b of the frame 110. The interconnection between the leaf spring 122 and the carriage 104 occurs approximately at the median region of said carriage by virtue of the presence of a hook 123 which protrudes perpendicularly and above said carriage 104. Figures 7 and 8 illustrate a fourth embodiment of an adjustment device for sports implements, generally indicated by the reference numeral 201, which is constituted by a carriage 204 to which one or more aligned wheels 202 are pivoted and which can slide within a frame 210. In this embodiment, the means for adjusting the mutual position of the carriage and of the frame are constituted by a screw 216 which is arranged perpendicularly to the carriage and to the frame in a region comprised between two adjacent wheels 202. Said screw 216 has a head 207 on which a notch is defined; said head protrudes inside the carriage 204 and thus arranges itself in the interspace between two adjacent wheels. The screw has a threaded stem 217 which interacts with a complementarily threaded bush 225 which is associated with the base of the carriage 204; said threaded stem has, at its free end, a disk 226 which is rotatably associated within a complementarily shaped seat defined on the base of the frame 210 which faces the corresponding base of the carriage 204. This solution allows to simultaneously vary the position of a pair of wheels. Figures 9 and 10 illustrate a fifth embodiment of an adjustment device for sports implements, generally indicated by the reference numeral 301, which is constituted by a carriage 304, to which one or more aligned wheels 302 are pivoted, which is slidingly associated within a frame 310. In this embodiment, the means for adjusting and/or guiding the mutual position of the carriage and the frame are constituted by two pairs of tabs 327a and 327b which are resilient and protrude laterally and below the carriage in the regions adjacent to one or more of the aligned wheels 302 and thus protrude approximately parallel to the first wings 305. Said two pairs of tabs have a toothed- region 328a and 328b which interacts with a complementarily shaped set of teeth 329 defined on the second wings 311a and 311b of the frame 310. The ends of the two pairs of tabs 327a and 327b protrude below the corresponding ends of the second wings 311a and 311b of the frame 310, so that they can be gripped by the user so as to momentarily disengage, by virtue of their deformability, the toothed regions of the complementarily shaped set of teeth and thus achieve the adjustment of the mutual position of the carriage and the frame. With reference to figures 11-13, the adjustment device, indicated by the numeral 601, for sports implements, is particularly usable for a skate which comprises a frame 602 for at least two wheels 603 which are arranged mutually aligned. The adjustment device 601 is applied at one or more of the wheels 603 and is constituted by a single pivot 604 which has a head 605 and a stem 606. At the head 605 there are means for rotating it, constituted for example by a seat 607 with a polygonal configuration for the insertion of an appropriate wrench of the Allen type, or the head 605 itself has the shape of a nob. A pair of eccentric elements, indicated by the numerals 608a and 608b, is instead associated with the stem 606 of the pivot 604; said eccentric elements are arranged in complementarily shaped seats 609a and 609b which are defined on the lateral walls 610a and 610b of said frame 602. Said pair of eccentric elements is interposed between the head 605, which is located outside the lateral wall 610b, and the threaded free end 611, which is external to the wall 610a, of the stem 606. Advantageously, the eccentric element 608a is keyed at a flattened region 612 defined on the stem 606. A nut 613 is furthermore associable with the end 611 of the stem 606 and has a notch 614 for the tip of a screwdriver; the width of the base of the nut is such as to interact with the eccentric element 608a and with the lateral wall 610a regardless of the position of said eccentric element: this allows to preset the play between the various components so as to allow an optimum rotation of the pivot 604. The use of the adjustment device is in fact as follows: the user, by turning the head 605 by using a simple Allen wrench, which has modest dimensions and is thus easy to carry, or by directly turning the knob-shaped head 605, imposes a rotation which arranges the eccentric elements either in the condition illustrated in figure 11 or in the condition illustrated in figure 12. It is thus possible to preset the distance between the base of the item of footwear and the axle 604 of the wheel 603 according to the use of the skate. The closure distance between the lateral walls 610a and 610b of the frame 602 and the distance between the eccentric elements 608a and 608b furthermore remains preset and constant, allowing the wheel to rotate without interferences due to friction; this is achieved by virtue of the abutment arrangement which occurs between the eccentric element 608a and the stem 606 and between the free end 611 and the cavity of the nut 613. Finally, the fact is stressed that the eccentric elements 608a and 608b form abutment shoulders to lock the inner ring 615 for the coupling of the bearings 616a and 616b to the axle 604 of the wheel 603. The fact is also stressed that a rotation of the eccentric element through ±90° with respect to the position of figure 11 and figure 12 allows to vary the longitudinal center distance between two adjacent wheels. Figure 14 shows an adjustment device 701, similar to that of figures 11-13, wherein it comprises a frame 702 supporting at least two wheels of which just wheel 703 is shown. A shaft, or pivot, 704 is supported by frame 702 and has, at one end, a head 705 provided with a tool seat 707 for engagement with, for example, a screwdriver. At the other end the shaft 704 is locked by a " locking head 713, which can be advantageously removable in a per se known manner, for disassembling the wheel. Shaft 704 supports an eccentric bush 708 which in turn supports a bearing 716 for the wheel 703. It is apparent that the adjustment of the wheel position is simply obtained by turning the head 705 of shaft 70 which in turn rotates the eccentric bush 708. The adjustment can be performed by the skater while wearing the skates. It has thus been observed that the invention has achieved the intended aim and objects, a skate with aligned wheels having been provided wherein it is possible to adjust, with a single operation and thus in a rapid and easy manner, the distance between the support of the item of footwear and the axle of one or more of the aligned wheels. The device furthermore allows to perform these adjustments without having to have particular tools available; said adjustments can furthermore be obtained without requiring the disassembly of any component on the part of the user, so that they are even more rapid and straightforward. Since no disassembly is required, the user no longer needs to have any spare parts available, since the loss of any component cannot be envisaged. The device according to the invention is susceptible to numerous modifications and variations, all of which are within the scope of the same inventive concept. The materials and the dimensions which constitute the individual elements of the invention may naturally be the most pertinent according to the specific requirements. Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the scope of each element identified by way of example by* such reference signs.

Claims: CLAIMS 1 1. Adjustment device for sports implements, 2 particularly for a skate comprising a support (3,510) for an 3 item of footwear (4,503) and at least two aligned wheels 4 (5,502,302,202,603) each having a shaft (12), characterized 5 in that adjustment means (6,516,608a,608b,708) are provided 6 between said at least two aligned wheels and are suitable 7 for simultaneously varying the interspace between said 8 wheels and the distance between said support and the shaft 9 of said at least two aligned wheels. 1 2. Device according to claim 1, characterized in that 2 it comprises a screw (6) which has a head (7) which can be 3 accessed by the user and a stem (8) which has two distinct 4 regions (9a,9b) with opposite threads, said two distinct 5 regions interacting with a first sleeve (10a) and with a 6 second sleeve (10b) which are complementarily threaded, each 7 sleeve being rigidly associated with the end which is 8 orientated concordantly with one of said shafts (11,12) of 9 said two mutually adjacent wheels. i 3. Device according to claim 2 , characterized in that 2 it has kinematic systems for interconnection between two of 3 said mutually adjacent wheels and said support, said 4 kinematic systems being constituted by a first pair of 5 connecting rods (13a,13b) and by a second pair of connecting 6 rods (14a,14b) which are freely pivoted to one another at 7 one end, at a third sleeve (15), and are pivoted to said 8 shafts at the other end, said third sleeve being pivoted to 9 said support at its ends. l 4. Device according to claim 3 , characterized in that a wall (16) is arranged laterally to said support and a guiding slot (17) is defined thereon for the sliding and movement of said first and second sleeves during the activation of said screw. 5. Device, according to claim 1, characterized in that it comprises a carriage (504,104,204,304,404), between which at least one of said at least two aligned wheels (502) can be arranged, and a frame (510,110,210,310,410), within which said carriage is slidingly associated and with which said item of footwear is externally coupled, at least one resilient member (515a, 515b) being provided between said carriage and said frame. 6. Device according to claim 5, characterized in that it comprises a carriage (504) which has a substantially C- shaped configuration and having first wings (505a,505b), said carriage being slidingly associated inside said frame which is C-shaped, said item of footwear being rigidly associated on said frame. 7. Device according to claim 6, characterized in that said frame has second wings (511a,511b) which are arranged parallel to said first wings and are slightly longer than said first wings, first slots (512a,512b) being defined longitudinally on said second wings, pivot means for fastening said wheels at said carriage wings being able to slide freely at said first slots. 8. Device according to claim 7 , characterized in that means for guiding the mutual position of said carriage and of said frame are arranged at said second wings of said frame, said means being constituted by a pair of pivots (513a,513b) which protrude laterally outside said first wings of said carriage, said pivots sliding within adapted second slots (514a,514b) defined longitudinally to said second wings, resilient pads (515a,515b) being interposed at said pivots at said second slots. 9. Device according to claim 5, characterized in that a screw (516) is provided between the base sides which connect said first and second wings of said carriage and said frame, said screw being freely rotatably associated transversely to said frame and having a threaded stem (517) and a knob (518) which can be accessed by the user, said threaded stem interacting with a complementarily threaded seat defined on a slider (519,419) which has a substantially triangular shape," the inclined side of said slider being directed toward said carriage and interacting with an equally inclined plane (520) of a raised portion which protrudes from said carriage, said resilient means comprising a pair of springs (422a,422b) which are arranged in regions adjacent to said slider (419) and said raised portion (421). 10. Device, according to claim 5, characterized in that said resilient means comprises at least one leaf spring arranged transversely to said frame in the interspace between said frame and said carriage, the ends of said at least one leaf spring being sunk within said first wings of said frame, the interconnection between said at least one leaf spring and said carriage occurring approximately at the median region of said carriage by means of a hook which protrudes perpendicularly and above said carriage. 11. Device, according to claim 5, characterized in that said means for adjusting the mutual position of said carriage (204) and said frame (210) are constituted by a screw (216) which is arranged perpendicularly to said carriage and said frame in a region comprised between two of said wheels which are mutually adjacent, said screw having a head (207), on which a notch is defined, which protrudes inside said carriage and is arranged in the interspace between two of said wheels which are mutually adjacent, said screw having a threaded stem (217) which interacts with a complementarily threaded bush (225) which is associated with the base of said carriage, said threaded stem having, at its free end, a disk (226) which is rotatably associated within a complementarily shaped seat defined on the base of said frame which faces the corresponding base of said carriage. 12. Device, according to claim 5, characterized in that said means for adjusting the mutual position of said carriage (304) and said frame (310) are constituted by two pairs of tabs (327a,327b) which are resilient and protrude laterally and below said carriage in the regions adjacent to at least one of said aligned wheels, said two pairs of tabs being arranged approximately parallel to said first wings, said pairs of tabs having a toothed region (328a, 328b) which interacts with a complementarily shaped set of teeth (329) defined on said second wings (311a,311b) of said frame, said ends of said two pairs of tabs protruding below the corresponding ends of said second wings of said frame so that they can be gripped by the user so as to momentarily disengage, by virtue of their deformability, said toothed region from said complementarily shaped set of teeth and thus achieve the adjustment of the mutual position of said carriage and said frame. 13. Device, according to claim 1, comprising a frame for said at least two aligned wheels (603), characterized in that at least one of said aligned wheels is pivoted to a pivot (604), said pivot having a head (605) provided with means (607) for rotating it, at least one pair of eccentric elements (608a,608b,708) which interact with the lateral walls (610a,610b) of said frame being provided on the stem of said pivot. 14. Device according to claim 13, characterized in that said means for rotating said head of said stem are constituted by a seat (607) for the insertion of an Allen wrench. 15. Device according to claim 14, characterized in that said at least one pair of eccentric elements is associated with said stem of said pivot, said eccentric elements being arranged in complementarily shaped seats (609a,609b) defined on the lateral walls of said frame, said at least one pair of eccentric elements being interposed between said head, which is external to one of said lateral walls, and the free end of said stem, said free end being threaded and external to the other one of said lateral walls, said eccentric element which is adjacent to said threaded end of said stem is keyed at a flattened region (612) defined on said stem. 16. Device according to claim 15, characterized in that a nut (613) is associable with the threaded end of said stem and has a notch for engaging a tool, the width of the base of said nut being such as to interact with said eccentric element and with said adjacent lateral wall regardless of the position of said eccentric element. 17. Device according to claim 16, characterized in that the distance between said lateral walls of said frame and the distance between said eccentric elements remains constant. 18. Device according to claim 17, characterized in that said eccentric elements constitute abutment shoulders for locking the inner ring of a pair of bearings for coupling to the axle of said wheel. 19. Device, according to claim 1, characterized in that it comprises a frame (702) supporting at least two wheels (703), a pivot (704) being associated with said frame for supporting each of said wheels, said pivot having an eccentric bush (708), said bush supporting a bearing (716) for said respective wheel (703), said pivot having a head (705) provided with a tool seat (707) for engagement by a tool.

Inventors: POZZOBON ALESSANDRO, SARTOR MARIANO, POZZOBON, ALESSANDRO, SARTOR, MARIANO
Applicants: NORDICA SPA, NORDICA S.P.A.
Application year: 1991
Main classification: A63C17
IPC codes: A63C17