AN ARRANGEMENT IN A LOAD CARRIER FOOT

Abstract: A load carrier foot is employed for securing a load carrier strut (1) to opposing edge portions of a vehicle roof. The load carrier foot includes a support portion (3) for abutment against the vehicle roof, a replaceable clamping member (4) for retentive engagement with the vehicle roof and a clamping device for activation of the clamping member (4). According to the invention, the load carrier foot is provided with a retainer portion (8) which is included in or is operable by the clamping device. The retainer portion (8) has a connection piece (9) in the form of an insertion space for accommodating a connection piece (10) on the clamping member (4) which is lockable in the insertion space by means of a locking device (11) spring-biased towards the locked position.

Description: AN ARRANGEMENT IN A LOAD CARRIER FOOT TECHNICAL FIELD The present invention relates to an arrangement in a load carrier foot of the type that is employed for securing a load carrier strut to opposite edge portions of a vehicle roof and comprises a support portion for abutment against the vehicle roof, a clamping member which is designed, by engagement with the vehicle and under the action of a clamping device, to clamp the load carrier strut and its feet fast to the vehicle, the clamping member being replaceable for adaptation to different vehicle models. BACKGROUND ART Arrangements of the type intimated by way of introduction are previously known in uncountable different designs. In these prior art constructions, it is common that the clamping member - which is thus specifically designed in response to the shape of the vehicle body - has an upper portion which cooperates with components disposed interiorly in the load carrier foot and which may thereby be deemed to form part, with the upper portion, of that clamping mechanism with which the load carrier foot is provided for its fastening on the vehicle body. As a result, the clamping member becomes a complicated and expensive component which cannot readily be mounted in the load carrier foot when the load carrier is to be adapted to a specific vehicle body. As a rule, a more or less extensive dismantling of the entire load carrier foot and its clamping mechanism is required before the clamping member can be mounted in place. In a corresponding manner, extensive intervention into the load carrier foot is required if the clamping member is to be replaced and substituted by another, for example in connection with moving the load carrier from one vehicle type or model to another. A further problem from which many prior art load carrier feet suffer is the inability of the clamping member to adjust in response to the shape of the vehicle body, where the major part of this adjustment entails that the clamping member is rotated about an axis of rotation which is transverse in relation to the vehicle. Given that the optimum position of rotation of the clamping member is often dependent upon the placing of the load carrier in the longitudinal direction along the vehicle, many prior art designs and constructions entail a less reliable securement, with the risk of damage not only to the vehicle but also to the clamping member itself as a result of oblique loading. PROBLEM STRUCTURE The present invention has for its object to design the arrangement intimated by way of introduction such that the clamping member, without dismantling of the load carrier foot or its clamping mechanism, may simply be mounted and dismounted, in principle by a single manual operation. The present invention further has for its object to realise an arrangement which permits a limited pivoting between the clamping member and the load carrier foot about a pivot axis which is transversely directed in relation to the longitudinal axis of the vehicle. The present invention further has for its object to realise an arrangement which is simple and economical in manufacture and which in addition affords extremely reliable function. SOLUTION The objects forming the basis of the present invention will be attained if the arrangement intimated by way of introduction is characterized in that the load carrier foot includes a retainer portion which is included in or operable ' by the clamping device, that the retainer portion and the clamping device have connection pieces for interconnection with one another, and that the clamping member is lockable in position interconnected with the retainer portion by means of a locking device. These characterizing features afford the major advantage that the clamping member may readily be mounted and dismounted in the load carrier foot. The present invention is further suitably characterized in that the clamping member includes a locking pin about which the clamping member is restrictedly pivotal in relation to the retainer portion. These characterizing features afford the major advantage that the clamping member is self-adjusting to the correct position in response to the configuration of the vehicle body when the clamping member is tightened. Further advantages will be attained according to the present invention if the subject matter as disclosed herein is also given one or more of the characterizing features as set forth in appended Claims 2 to 5 and 7. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS The present invention will now be described in greater detail hereinbelow, with particular reference to the accompanying Drawings. In the accompanying Drawings: Fig. 1 is a partial cross section through a load carrier foot according to the invention; Fig. 2 is a separate view of the retainer portion and clamping member, seen in the direction of the arrow B in Fig. 1; and Fig. 3 is a cross section taken along the section marking A-A in Figs. 1 and 2. DESCRIPTION OF PREFERRED EMBODIMENT Referring to the Drawings, reference numeral 1 in Fig. 1 relates to a load carrier strut which, in the mounted position on a vehicle, extends transversely over the vehicle roof. Reference numeral 2 relates to a load carrier foot which is intended to secure the load carrier strut to opposing side edge portions of the vehicle roof. In its lower end, the load carrier foot 2 has a support portion 3 which is intended to abut against the vehicle roof. The load carrier foot 2 may be displaceable along the load carrier strut 1 but those means which put into effect such movement do not form part of the present invention. The load carrier foot 2 is further provided with a clamping member 4 which, by engaging with edge portions of the vehicle roof or with areas of the vehicle body located beneath the roof, or possibly with anchorages specifically provided for this purpose and mounted on the body, is intended to secure the load carrier on the vehicle. The movements which, to this end, the clamping member undergoes are composed of an upwardly directed movement towards the load carrier strut 1 and an inwardly directed movement (towards the longitudinal centre line of the vehicle) in the longitudinal direction of the load carrier strut 1. The proportions between these components may vary in the movement diagram, and may also vary in response to the detail design of the load carrier foot 2. Taken as a whole, the clamping member 4 realises an urging laterally towards the vehicle body while at the same time urging the support portions 3 against the vehicle roof. For operating the clamping member 4, the load carrier foot 2 includes a clamping device whose detailed design and construction do not constitute any germane part of the present invention but which comprises a rocker 6 pivotal about a shaft 5 rigidly secured in the load carrier foot 2. In terms of movement, the rocker 6 is coupled to the clamping member 4, among other things by the intermediary of a stub shaft 7. On rotation of the rocker in a counterclockwise direction according to the arrow C from the open position illustrated in the Figure, the lower portion of the clamping member 4 will move to the left at the same time as being lifted. This generates a clamping movement for the clamping member 4. On rotation in the opposite direction, the clamping member is released following a pattern of movement in the reverse order. The rocker 6 which, in the illustrated version, may represent (or possibly be considered as constituting) a part of the clamping device, is pivotally connected via the above-disclosed stub shaft 7 to a retainer portion 8 which, in turn, is interconnected with the clamping member 4. To this end, the retainer portion 8 and the clamping member 4 are provided with mating connection pieces 9 and 10, respectively. In the interconnected position, the interconnection action itself is locked by a locking device 11. It will be apparent from Fig. 3 (which shows a simplified cross section taken approximately along the section marking A- A in Fig. 1), that the connection piece 9 of the retainer portion 8 is approximately C-shaped in cross section and defines an accommodation or insertion space 12 in which the connection piece 10 of the clamping member 4 is housed. In such instance, the clamping member 4 is insertable in its longitudinal direction with the connection piece 10 into the connection piece 9 on the retainer portion 8. Alternatively, the connection piece 10 of the clamping member 4 may be designed so as to define an accommodation space in which the connection piece 9 of the retainer portion 8 is insertable. The interconnection of the clamping member 4 and the retainer portion 8 is such that no - or only insignificant - movement between them can take place in the clamping direction of the clamping member, i.e. in an upward and downward direction in Figs. 2 and 3. On the other hand, the interconnection is conceived in such a manner that a limited pivotal capability is provided for the clamping member 4 in relation to the retainer portion 8 in a direction which is transverse to the longitudinal axis of the vehicle and which is thereby roughly normal to the approximate plane of extent of the clamping member 4. This pivotal capability is realised in that the locking device 11 is designed as a pin which extends through mutually covering apertures 13 and 14 in the retainer portion 8 and clamping member 4, respectively, in the interconnected state. This limited pivotal capability is illustrated in Fig. 2 by the double headed arrow D. The locking device 11 is placed on an operating portion 15 which is made of a resilient material so that the locking device 11 is thereby pretensioned towards its locking position. In order, despite the pretensioning of the locking device 11, to permit a simple insertion of the clamping member 4 into the insertion or accommodation space 12 of the retainer portion 8, the locking device 11 is provided with an obhquely inclined ramp 16 which, on insertion of the clamping member 4, moves aside the locking device 4 until this snaps back into the aperture 14 of the clamping member 4. For release of the clamping member 4, it is sufficient that the operating portion 15 is grasped at its under edge and lifted or pivoted away from the retainer portion 8 so that the locking pin or device 11 releases its engagement in the aperture 14 of the clamping member 4. In order to guarantee the correct pattern of movement for the clamping member 4 on its clamping movement, the load carrier foot 2 is provided with an abutment portion 17 against which the assembly of retainer portion/ clamping member/ operating portion is urged when the load carrier foot is clamped in place. This urging of the above-disclosed assembly entails that the operating portion 15 will come into abutment against the abutment portion 17 and be urged towards the locking position so that, in the fixedly clamped position on a vehicle roof, there will thereby no longer be any possibility of releasing the locking device 11 so that the clamping member 4 can consequently be removed. Given that the retainer portion 8 and operating portion 15 mounted thereon will, on tightening of the load carrier foot, come into engagement against the abutment portion 17, both the retainer portion 8 and the operating portion 15 will be counted as being included in the locking mechanism of the load carrier foot, together with the rocker 6. For fixing the operating portion 15 and the locking pin 11 mounted thereon onto the retainer portion 8, the operating portion 15 is provided with a section which extends along the connection piece 9 of the retainer portion 8 to its upper end, where the operating portion is provided with a recurved portion 18 which is designed for snapping the operating portion 15 into an aperture 19 in the upper end of the retainer portion 8. This implies that the operating portion 15 may readily be replaced in such situations as, for example, wear which may possibly be caused by the urging action against the abutment portion 17. On tightening of the clamping mechanism for fixing the load carrier foot onto a vehicle, the engagement between the connection pieces 9 and 10 on the retainer portion 8 and clamping member 4, respectively, will transfer the moment of flexure to which the unit comprising the retainer portion and clamping member is exposed as a result of the horizontal component of clamping force (the component running in the longitudinal direction of the load carrier strut). The force in the longitudinal direction of the unit comprising the retainer portion and clamping member will, on the other hand, substantially be absorbed by the locking pin 11. For this reason, the locking pin 11 is of considerable diameter in relation to the width of the connection piece 10 of the clamping member 4. Suitably, the locking pin 11 may have a diameter which amounts to the order of magnitude of half of the width of the connection piece 10. The present invention may be modified without departing from the spirit and scope of the appended Claims.

Claims: WHAT IS CLAIMED IS: 1. An arrangement in a load carrier foot of the type that is employed for securing a load carrier strut (1) to opposite edge portions of a vehicle roof and comprises a support portion (3) for abutment against the vehicle roof, a clamping member (4) which is designed, by engagement with the vehicle and under the action of a clamping device, to clamp the load carrier strut and its feet (2) fast to the vehicle, the clamping member being replaceable for adaptation to different vehicle models, characterized in that the load carrier foot (2) includes a retainer portion (8) which is included in or operable by the clamping device; that the retainer portion and the clamping member (4) have connection pieces (9 and 10, respectively) for interconnection with one another; and that the clamping member is lockable in position interconnected with the retainer portion by means of a locking device (11). 2. The arrangement as claimed in Claim 1, characterized in that the connection piece (9) of the retainer portion (8) forms an insertion space (12) in which the connection piece (10) of the clamping member (4) may be accommodated. 3. The arrangement as claimed in Claim 1, characterized in that the connection piece (10) of the clamping member (4) forms an insertion space in which the connection piece (9) of the retainer portion (8) may be accommodated. 4. The arrangement as claimed in any one of Claims 1 to 3, characterized in that the locking device (11) is provided with an operating portion (15) which, in the fixed position of the load carrier foot (2) on the vehicle, is actuated towards the locked position by urging against an abutment portion (17). 5. The arrangement as claimed in any one of Claims 1 to 4, characterized in that the locking device (11) is spring-biased towards the locked position. 6. The arrangement as claimed in any one of Claims 1 to 5, characterized in that the locking device (11) comprises a locking pin about which the clamping member (4) is restrictedly pivotal in relation to the retainer portion (8). 7. The arrangement as claimed in any one of Claims 1 to 6, characterized in that the locking device (11) extends through apertures (13, 14) which, in the interconnected position, are located in register with one another and which are disposed in the connection pieces (9 and 10, respectively) of the retainer portion (8) and the clamping member (4).

Inventors: LUNDGREN ANDERS, LUNDGREN, ANDERS
Applicants: LUNDGREN ANDERS, THULE IND AB, INDUSTRI AB THULE, LUNDGREN, ANDERS
Application year: 1995
Main classification: B60R9
IPC codes: B60R9