AU2005203046A1 - Article Support Rack for Vehicle - Google Patents

Description

AUSTRALIA

Patent Act 1990 COMPLETE SPECIFCATION INTERNATI[ONAL PATENT Article. support rack for vehicle The following statement is a full description, of this invention, including the best method of performing it kinown to me: Article Support Rack for Vehicle One particular application of this invention concerns article support racks attachable to the rear of cars, for example by use of a towbar or hitch. Although it will be convenient to hereinafter refer to this application, it is to be understood that this is not to be taken as a limitation of the scope of the invention.

Articulated support racks are known, however, when subjected to high wind and other varying loads, this style of rack tends to lack strength, as a result of its jointed structure, Locking the support rack in a traveling position has also not been addressed adequately, in a way that also compliments the strength requirements.

The present invention seeks to alleviate one or more of the abovementioned disadvantages According to one aspect of the present invention there is provided a support rack suitable for use with a vehicle, the rack including: a main firame; a support frame; and a locking assembly adapted to hold the support rack in the transport position; the main frame adapted to move the support frame from a transport position to a loading position.

Preferably, the main frame is in the form of a column assembly pivotally connected at its base to a mounting bracket, and at its top to the support frame. In one form, the column assembly includes two post assemblies longitudinally spaced apart and pivotally connected to the mounting bracket. Both post assemblies may be pivotally connected to the support framne such that when the rack is moved from the transport position. to the loading position, the support frame is maintained in a generally horizontal position. While the post assembly in the transport position defines a rectangle, in the loading position, the post assembly defines a parallelogram.

In one form, the support frame may be one or more U-shaped tubes, or alternatively shaped bodies for the purpose of broadening the support base for articles and maintaining low overall mass of the rack.

Preferably the locking assembly includes articulated locking arms and a securing device for fastening one or more arms to the column assembly. A first locking arm is pivotally connected at its lower end to the column assembly, and a second locking arm is pivotally connected at its upper end to the support frame. The securing device fastens the second arm and the column assembly together.

The longitudinally-spaced apart post asse mblies may be arranged into pairs of laterally spaced apart posts, and a first pair they may be tied so that they articulate in unison, the tying being any suitable means such as for example bolts or rods. The bolts or rods may also pivotally connect the locking bars.

In one preferred from the securing device fastens the second locking arm to its respective post Preferably, the securing advice is in the form of holes in both locking arm and post with a lock pin passing therethrough with a keeper clip or split pin to maintain the lock pin in place. However, threaded holes with threaded bolts or screws may be used, or a clamping device, or other suitable means.

The upper end of the second locking arm is preferably pivotally connected to the support frame distal the pivotal connection between the column assembly and support frame, and generally intermediate the said pivotal connection and the rearward end of the support frame. This spacing allows the locking arm to provide strengthening to the rack, as the arm forms a truss structure with the post and support beam when the securing device Preferably, biasing means are provided to dispose the articulated rack to return to the raised position- The biasing means may be in the form of, for example, springs, elasticised cords, octopus straps and the like.

Stops may also be provided, in one position so as to prevent the biasing means from driving the posts into the rear of a vehicle to which the rack may be attached. In another position the stops define the rack's. powered position, and prevent the support rack from descending below a predetermined height for article loading.

A handle also be provided, to assist in raising and lowering the rack In one form the handle forms part of the second locking arm, and is an extension thereof.

The mounting bracket is adapted to attach to towball and hitch-style towing mechanisms.

The support frame may include clamps for holding, for example, bicycle frames and the like.

In order to enable a clearer understanding of the invention, drawings illustrating example embodiments are attached, and in those drawings: Figure 1 is an isometric view of the rack in the transport position; Figure 2 is a plan view of the rack in the transport position; Figure 3 is a side elevation view of the rack in the transport position; Figure 4 is a side elevation view of the rack in the loading position.

Referrng to the drawings there is shown an article support rack including column assembly 12 which includes post'assembly including posts 14, 16, 18 and pivotally connected at each respective lower end to mounting bracket 28 and at its upper ends to a support frame 22, for movement between a trasport position (Figures 1 and a losing position (Figure 4).

The support frame 22 includes U-shaped support arms 24 and 26, each of which Is pivotally connected to their respective posts (eg tube 24 to posts 14 and 16) such that under movement between the transport and loading positions, the support frame maintains a horizontal orientation. Thus, in the transport position the column assembly 12 defines a rectangle, while in the loading position the column assembly 12 defines a parallelogram.

A locking assembly 37 is provided, including a first locking arm 36 and a second locking arm 38, and second locking arm 38 in Figures 1 3 being secured to its respective post 20 through hole 48 (which passes through both post 20 and arm 3 8) via lock pin (not shown). The second arm 38 is pivotally connected to support arm 26 at 42, distal the pivotal connection 50, so that when locked in the transport position, the locking assembly 37 provides additional strength to the support rack via truss structure formed by links 48-50 (post 20), 50-42 (support arm) and 42-48 (second locking bar 3 8).

A handle is provided at 46, in the form of an extension of second locking arm 38, to assist in moving between loading and transport positions, and vice versa.

Biasing means in the form of elasticised cords 34 are provided, anchored between the forward post assembly (posts 14 and 18) and support frame ties (pivotal connection at 42). These cords arrest any acceleration from transport position and loading position, and also assist in moving from loading position to transport position.

Stops are provided at 30, in the form of bars operatively connected to mounting bracket 28 to define the final position of the column assembly takes in the loading and transport positions, by obstructing movement of respective posts.

In operation a user may move the support rack 10 from the transport position shown in Figures 1 3 be removing the pin in hole 48 and taking hold of the handle 46 and moving outwards and downwards towards the loading position shown in Figure 4, until the posts rest against the stops 30. The rectangle formed in the loading position by the column assembly 12 becomes a parallelogram, the locking assembly 37 becomes elongated, and the handle 46 stands more erect, for convenient access.

Articles, such as for example, bicycles, may be then loaded onto the support frame 22, and clamped into position via clamps (not shown). The handle 46 may then be grasped, the support frame and articles placed into the transport position shown in Figures I 3, and the lock pin inserted through both locking arm 38 and post 20 via hole 48 and a keeper clip inserted into lock pin (both not shown) to increase rigidity and maintain the rack 10 in the transport. position- Similar pins and keeper clips should be inserted into corresponding holes in the other side of the apparatus.

4 Finally, it is to be understood that the inventive concept in any of its aspects can be incorporated in many different constructions so that the generality of the proceding description is not to be superseded by the particularity of the attached drawings.

Various alterations, modifications and/or additions may be incorporated into the various constructions and arrangements of parts without departing from the spirit or ambit of the invention.

Claims (1)

1. The support frame cantilevers from the main frame, the locking device is articulated, and forms part of a truss structure to reduce wobbling when in the transport position and provide additional strength to the support frame. A handle extends from the locking device, the articulation of the latter allowing the handle to rise and fall so that it tends to assume a comfortable lifting position to lift or lower the frame between positions. Further features include an articulated main frame, as well as biasing means connected between the locking device and main frame, to reduce lifting force. Dated this 22 day of December 2003 FREDERICK WILLIAM JAMES W TITNALL and LAURA JANE WHITNALL