Bicycle stand

Abstract: A bicycle stand designed to be mounted on a rear fork (2), or at least a support plate (3) attached thereto, of a bicycle (1), between rear wheel and crankshaft. The bicycle stand comprises a housing (7) mounting a support leg (6) to be pivoted between and locked in at least two positions. The housing (7) is formed such that in mounted position the plane of pivoting movement of the support leg (6) is at an oblique angle relative to the longitudinal median plane (22) of the bicycle (1). The support leg (6) is fixedly connected with a pin (10) extending substantially perpendicularly thereto, the terminal portions of said pin being bearing-mounted for rota­ tion relative to the housing (7). According to the invention the support leg (6) is connected to said pin (10) between the terminal portions of said pin (10) which are bearing-mounted relatively to the housing (7).

Description: The invention relates to a bicycle side stand designed to be mounted on a rear fork, or at least a support plate attached thereto, of a bicycle between rear wheel and crankshaft, which bicycle stand comprises a housing mounting a single support leg to be pivoted between and locked in at least two positions, the housing being formed such that, when mounted to a bicycle in a position for use the plane of the pivoting movement of the support leg extends at an oblique angle relative to the longitudinal median plane of the bicycle, the support leg being fixedly attached to a pin extending substantially perpendicularly to said support leg, terminal portions of said pin being bearing-mounted for rotation relative to the housing. Such bicycle stands are disclosed in CH-A-166,637 and US-A-2,229,551, where the support leg is connected with an end of the pin and is formed from a rod as one whole with the pin by bending a terminal portion of that rod. A drawback of the known bicycle stands of the type described hereinabove is that the bent portion of the rod where the support leg merges with the pin forms a projecting element harbouring risk of injury. A further problem is to provide a durable, stable suspension for the support leg relative to the housing. The object of the invention is to provide a bicycle stand of the type described in the preamble, in which the problems referred to are overcome. To achieve this object, according to the invention the support leg is connected with the pin between the terminal portions of that pin, which are bearing-mounted relatively to the housing. This permits optimum use to be made of the space under the rear fork for rotatably mounting the terminal portions of the pin in spaced relation, without the transition from the support leg to the pin projecting from the housing and on the side of the rear fork of the bicycle. By spacing apart the bearings for transmitting the moment initiated by the support leg, a reduction of the load on these bearings is achieved. The wear that these bearings which rotatably support the pin are subject to, is limited. Optionally they may be of lighter construction than in the known bicycle stand, or the gained increase of the stability of the bearings of the pin may be employed for the use of a support leg capable of pivoting further to the side of the frame of the bicycle. This last step allows a more stable support of the bicycle, but also the exertion of a greater moment by the support leg. Further, in particular when the plane of pivoting movement extends at a relatively large angle relative to the longitudinal median plane of the bicycle, an improved support of the pin relative to the rear fork on the side of the support leg is obtained. This advantage can be achieved in virtue of the fact that at the end of the pin there is no projecting bent transition to a support leg, so that the end of the pin which is proximal to the rear fork can be bearing-mounted at a very small distance from the rear fork, and hence is stable relatively to that rear fork. Particular embodiments of the invention are set out in the dependent claims. One embodiment of the invention will now be further explained and illustrated with reference to the accompanying drawings, in which: Fig. 1 is a rear sectional view of a bicycle stand according to the invention mounted on a rear fork of a bicycle; Fig. 2 is a front view of the bicycle stand according to Fig. 1 showing a part of a bicycle; and Fig. 3 is a view of a part of a housing of the bicycle stand according to Figs. 1 and 2. Referring to Figs. 1 and 2, a part of a bicycle 1 is shown with a rear fork 2 and a support plate 3 welded thereto. A bicycle stand 4 according to the invention is mounted on the support plate 3 by means of a bolt 5. The bicycle stand 4 comprises a support leg 6, a housing 7, comprising a positioning member 8 and a bracket member 9. Mounted on the support leg 6 is a pin 10, extending in substantially transverse direction relative to that support leg 6. At terminal portions of the pin 10 suspensions 11 and 12 are formed by holes in the positioning member 8 and the bracket member 9, respectively, these holes mounting the pin 10 for rotation relative to the housing 7 and for displacement in its longitudinal direction. Between the support leg 6 and the bracket member 9 a helical spring 13 is arranged around the pin 10. Provided in positioning member 8 are positioning recesses 14 and 15 (see also Fig. 3). The spring 13 presses the support leg 6 and the pin 10 in the direction of the positioning recesses 14 and 15. The positioning member 8 is clamped in position between the bracket member 9 and the support plate 3. Provided in the bracket member 9 is a threaded hole 16 for the bolt 5 to engage. The positioning member comprises a clamping surface 17 bounded by ribs 18 and 19 and an upright edge 20 surrounding the hole 11. Provided at the end of the stand that is remote from the housing 7 is a foot 21. When a bicycle 1 comprising a bicycle stand 4 according to the invention is arranged to be supported by this stand, the support leg 6 exerts a moment on the bicycle 1, which prevents the bicycle from falling down. This moment is initiated by the support leg and transmitted via the pin 10 to the housing 7. The pin 10, extending substantially transverse to the support leg 6 may be of relatively great length in virtue of the fact that no elements disposed beyond the ends of that pin are connected to that pin. Owing to the relatively great length of the pin 10 the load on the suspensions 11 and 12 at the ends of the pin is relatively light, and, accordingly, these suspensions may be of light construction, can be loaded and/or will be wear-resistant. The angle A between the pin 10 and the longitudinal median plane 22 of the bicycle 1 defines the angle B between the plane of the pivotal movement of the support leg 6 and the longitudinal median plane 22 of the bicycle 1. According as angle B is greater, the angle A is smaller and the pin 10 to be mounted under the rear fork 2 may be of greater length. It is advantageous for the end of the pin which is proximal to the rear fork 2 to be bearing-mounted very closely to that rear fork. In virtue of the fact that the support leg 6 is mounted between the terminal portions of the pin 10, bearing-mounted in the housing 7, the positioning recesses 14, 15 which engage the support leg may be turned towards the inside of the housing 7. This eliminates the necessity of disposing any locking means on the outside of the housing. Such locking means harbour the risk of injury and of damage to clothes and limit the options as to the outward appearance of the housing 7. The support leg 6 is pressed into the direction of the positioning recesses 14 and 15 provided in the positioning member 8 by the spring 13 acting in the longitudinal direction of the pin 10 and is guided by the pin 10 adapted to be displaced in its longitudinal direction in the suspensions 11 and 12. When the support leg is moved to a point in front of one of the positioning recesses 14 or 15, the support leg will be locked in that positioning recess as a result of the action of the spring 13. The support leg 6 can thus be readily extended and retracted. Each of the housing members 8 and 9 mounts a terminal portion of the pin 10 and before being mounted on a bicycle the housing members 8 and 9 can each be slid over one of the terminal portions of the pin 10 in the axial direction of the pin 10 to abut the other housing member so as to form the housing 7. For the mutual fixation of the members 8 and 9 of the housing 7 the bracket member 9 is drawn towards the rear fork 2 of the bicycle by means of the bolt 5, with the positioning member 8 being clamped therebetween. To establish the relative positioning of the positioning member 8 and the bracket member 9 the positioning member is provided with a clamping surface 17 formed to correspond with the bracket member, which clamping surface 17 is bounded by the ribs 18 and 19 and the edge 20 surrounding the hole 11. To assemble the stand the short end of the pin 10 can be mounted in the hole 11 in the housing 7. Then the spring 13 can be slid over the long end of the pin 10, and the pin 10 and the spring 13 can be locked by mounting the bracket member 9 over the pin 10 until it is in engagement with the surface 17. Counter to the force exerted by the spring 13, the bracket member 9 remains fixated relatively to the positioning member 8 and the pin 10, on account of the fact that the force exerted by the spring 13 on the bracket member 9 causes the bracket member 9 to tilt relatively to the positioning member 8, thus forcing the bracket member 9 into clamping engagement with the walls of the rib 18 and the edge 20 bounding the surface 17. The housing 7 can be assembled without separate attachment devices or tools, and in a very short time as well, since assembly comprises only single movements controlled by stops. To obtain a reliable engagement of the bracket member 9 with the positioning member 8, until the stand is mounted on a bicycle, the bracket member 9 preferably comprises a sharp edge 24 engaging said wall of the edge 20. Because the positioning recesses 14 and 15 are spaced away from the pin 10 on which the support leg 6 pivots, a relatively small force exerted by the positioning recesses on the support legs will yield a sufficiently strong locking of the support leg 6. Further, the supporting surfaces of the positioning recesses 14 and 15 can thus be formed to be sufficiently large to ensure that the pressure exerted on the positioning member is sufficiently low to allow that member to be made of plastic. Plastic design in turn offers the advantage that the guide of the support leg 6 need not be lubricated and that the positioning member 8 may be formed as one whole, while at the same time it allows relatively great freedom as to the design of the upwardly turned side of the positioning member which is visible to the user. The plastic from which the housing 7 is to be made is preferably a polyacetal. This type of plastic which is processed by injection moulding has a low coefficient of friction when friction with metal is involved and is wear resistant. When the support leg 6 is locked in one of the positioning recesses 14 and 15, the distance over which the pin 10 extends into the mounting bore 11 is greater than the depth of the positioning recesses 14 and 15 relative to an edge 23 extending between these recesses 14 and 15. Thus it is ensured that the pin 10 remains bearing-mounted in the bore 11 when the support leg 6 is pivoted from one positioning recess to the other. The pin 10 of a bicycle stand according to the invention for use in a conventional bicycle preferably has a length of at least 55 mm, and the distance between the suspensions 11 and 12 is preferably at least 35 mm. Owing to the fact that the support leg 6 of a bicycle stand according to the invention, when in the extended position, can make a relatively great angle B with the longitudinal median plane 22 of the bicycle, the support leg 6 may have a relatively great length and rest on a support surface at a relatively great distance from the longitudinal median plane 22 of the bicycle 1, so that a relatively small surface pressure is exerted on that supporting surface. To further reduce the surface pressure exerted on the supporting surface, the support leg 6 may comprise a foot 21, so that the bicycle supported by the stand can be positioned on an even softer supporting surface without the support leg 6 penetrating into the soil and causing the bicycle to fall. In a conventional stand, which has a relatively short support leg, such a foot, when the support leg is retracted, would extend into the cyclic path traversed by the cyclist's foot during cycling, so that the foot would knock against it. The support leg 6 of the bicycle stand according to the invention, however, can be designed to be so long that when the support leg 6 is retracted the foot 21 is disposed further back, clear of the path of the cyclist's foot.

Claims: A bicycle side stand (4) designed to be mounted on a rear fork, or at least a support plate (3) attached thereto, of a bicycle between rear wheel and crankshaft, said bicycle stand (4) comprising a housing (7) mounting a single support leg (6) to be pivoted between and locked in at least two positions, the housing (7) being formed such that, when mounted to a bicycle in a position for use, the plane of the pivoting movement of the support leg extends at an oblique angle relative to the longitudinal median plane (22) of the bicycle, the support leg (6) being fixedly attached to a pin (10) extending substantially perpendicularly to said support leg (6), the terminal portions of said pin being bearing-mounted for rotation relative to the housing (7), characterized in that the support leg (6) is connected with said pin (10) between the terminal portions of said pin (10), which are bearing-mounted relatively to the housing (7). A bicycle stand according to claim 1, characterized in that the housing (7) comprises two housing members (8 and 9), each of these housing members (8 and 9) mounting a terminal portion of the pin (10) and each of said housing members (8 and 9) being designed to be slid, prior to being mounted on a bicycle, in axial direction of the pin (10) over one of the terminal portions of the pin (10) to abut the other housing member so as to form the housing (7). A bicycle stand according to claim 2, comprising a bolt for mounting the stand on the rear fork, characterized in that the housing members (8 and 9) in mounted position are clamped together by means of said bolt (5). A bicycle stand according to claim 2, in which positioning recesses are provided in the housing formed to correspond with the support leg, the pin can be displaced in its longitudinal direction relatively to the housing and in which a spring is arranged around the pin, which spring rests against the housing and keeps the pin pressed in the direction of said positioning recesses, characterized in that the positioning recesses (14, 15) face the inside of the housing (7) and that the spring (13) is arranged on the side of the support leg (6) which is remote from the positioning recesses (15) and which spring rests against the housing member (9) which is disposed opposite the positioning recesses (14, 15). A bicycle stand according to claim 4, characterized in that a portion of the one housing member (9) is disposed between walls of the other housing member (8), which extend substantially parallel to and spaced away from the pin (10), with said portion of the one housing member (9) being clamped between said walls of the other housing member (8). A bicycle stand according to claim 5, characterized in that the portion of the one housing member (9) clamped between said walls of the other housing member (8) rests against a first wall surface turned towards the pin (10) and a second wall surface turned away from the pin (10), the second wall being disposed at a smaller distance from the pin (10) than the first wall and the area where the portion of the one housing member (9) rests against the second wall is disposed further away in longitudinal direction of the pin from the end of the pin (10) mounted in the one housing member (9) than the area where that portion of the one housing member (9) rests against the first wall. A bicycle stand according to claim 4, characterized in that the positioning recesses (14 and 15) are spaced away from the pin (10) in a member (8) of the housing (7) which member is made of plastic. A bicycle stand according to claim 7, characterized in that said plastic is a polyacetal. A bicycle stand according to claim 8, characterized in that the housing member (9) disposed opposite the positioning recesses (14, 15) has a hole (16) provided therein with a helical thread which corresponds with the helical thread of the bolt (5) for mounting the stand (4), the housing member (8) made of plastic comprising an engagement surface (17) for positioning that member (8) between the further member (9) and the rear fork (2) or at least the support plate (3) of the bicycle mounted thereto. A bicycle stand according to claim 1, characterized in that the pin (10) has a length of at least 55 mm and the mutual distance between the suspensions (11, 12) of the terminal portions of the pin (10) is at least 35 mm.

Inventors: OSKAM WILLEM, OSKAM, WILLEM
Applicants: BATAVUS BV, BATAVUS B.V.
Application year: 1990
Main classification: B62H1
IPC codes: B62H1