Vehicle exterior material clamping apparatus with scissors-like closure motion

An apparatus for carrying a workpiece adjacent an exterior surface of a vehicle, provides a stationary resting surface mounted on an exterior surface of the vehicle and one or more movable clamping bars positioned adjacent to the resting surface. A driving screw moves the clamping bar in a scissors type motion, alternately toward the resting surface, so as to clamp the workpiece, and away from the resting surface so as to release the workpiece, whereby the workpiece may be safely transported by the vehicle. The apparatus may be mounted onto a panel truck, normally adjacent to one or both side panels, or may be mounted on the sides of a pick-up type truck.

CROSS-REFERENCE TO RELATED APPLICATIONS

Not applicable.

Not applicable.

THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT

Not applicable.

INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTTED ON A COMPACT DISC

Not applicable.

REFERENCE TO A “MICROFICHE APPENDIX”

Not applicable.

BACKGROUND OF THE INVENTION

1. Field of the Present Disclosure

This invention relates generally to materials transporting devices, and more particularly to such a device for clamping panels onto the exterior of a truck for transporting such goods.

The following art defines the present state of this field:

Adamczewski et al, U.S. Pat. No. 6,193,123, teaches a precursor apparatus of a similar type to the present invention and intended for the same purpose. However, the '123 reference is not easily adapted for temporary mounting onto the exterior of a truck nor for easy adjustability for different sized trucks and workloads. The '123 reference teaches that the clamping drive be mounted under the truck with the screw piercing the truck body. This is undesirable in most cases to those that would haul materials on a non-commercial basis. The clamping action is direct with the movable jaw moving away and toward the stationary jaw. In the present invention a much more effective scissors-type motion is provided. The distinctions between '123 and the present invention will become clear from the following detailed description and accompanying drawings.

Peckenpaugh, Sr., et al., U.S. Pat No. 5,450,956 describes an adjustable, telescopic, carrying and storage case of variable and fixed length including a hollow adjustable, telescopic front member of variable length and a hollow adjustable, telescopic rear member of variable length that can be separated or connected tightly. The case is adjustable in length and can be used at a maximum length and at a minimum length for ease in transportation. The case is preferably used for carrying and storing different items including telescopic fishing rod assemblies. The telescopic front member comprises a first container portion and a plurality of adjustable front telescopic locking sections which are placed in an interlocking relationship through a plurality of annular tapered locking surfaces and a number of annular locking surfaces. The telescopic rear member comprises a second container portion and a plurality of adjustable rear telescopic locking sections which are placed in an interlocking relationship through a plurality of annular tapered locking surfaces and a number of annular locking surfaces.

Emer, EP0314632, describes an apparatus for the handling of sheets made of glass or other materials, as panels and the like, shaped as plates and to be used for supply said sheets or plates in working lines and to be mounted on an overhead traveling crane running along the working line. The apparatus comprises a frame provided with pneumatic devices for griping a sheet or plate at least two chains for the support of the frame and cooperating with means apt to case the suspended sheet or plate to be rotated, said chains being supported, through a support telescopic device of an adjustable length, by a truck traveling along the rail beams of the overhead traveling crane.

Lautenschlager, EP0580075, describes an automatic telescopic device for drawer runners, comprising a guide rail formed by a profile section turned over from sheet metal to be secured to the carcass wall, said guide rail having a profiled flange bent upwardly from a profiled flange projecting substantially at right angles and horizontally from the carcass wall and engaging from below the associated runner formed by a hollow profile section open at its underside to be removably secured to the drawer, and provided in the interior of the runner with raceways for rolling elements which are held in an elongated cage and can roll, on the one hand, on the raceways of the guide rail and, on the other hand, on raceways formed by associated regions of the inner surface of the runner, thereby allowing for longitudinal displacement of the runner relative to the guide rail, a component which can pivot between two end positions and is biased bistably into the end positions by means of spring arrangement being provided and having an open-ended recess for a projection projecting downwardly from the runner in a portion projecting beyond the horizontal profiled flange of the guide rail into the interior of the carcass, and the projection and the pivoting component being arranged relative to one another in relation to the runner or the guide rail in such a manner that, when the runner is displaced from the open-drawer position, as it approaches the closed position, the projection moves into the recess in the pivoting component in the end position associated with the opendrawer position and then, once the dead center of the pivoting component has been passed, is driven resiliently together with the latter into the closed-drawer position, characterised in that the pivoting component is mounted in a separate elongated housing secured to the guide rail so as to pivot about a substantially perpendicular axis and that a detent is provided immediately in front of the recess in the pivoting component as viewed in the direction of insertion of the drawer, wherein said detent is withdrawn into the housing into the path of the projection projecting from the runner in the end position associated with the open-drawer position, and in the end position associated with the closed-drawer position projects into the path of the projection, but can be traversed by the projection in the direction of insertion by means of resilient deformation.

Lechevallier, EP0691911 describes a removable frame for loading, unloading and moving container's of goods on trucks or wagons without typical lifting machinery such as cranes, gantries and such. It permits unload directly onto the ground. The invention is characterized by arrangement of a frame encompassing the load. Two lifting surfaces are provided with lateral spacing between them and are placed transverse of the vehicle's axle. Each of the surfaces is lifted by a telescoping jack and facility for locking the load in place is provided.

The prior art teaches a very wide range of materials storage and handling systems. However, the prior art does not teach that an actuated clamping device may be mounted onto a truck for clamping panel goods for transport. The present invention fulfills these needs and provides further related advantages as described in the following summary.

BRIEF SUMMARY OF THE INVENTION

The present invention provides an apparatus for carrying a workpiece adjacent an exterior surface of a vehicle, including a stationary resting surface mounted on the exterior surface and one or more movable clamping bars positioned adjacent to the resting surface. A driving screw moves the clamping bar in a scissors type motion, alternately toward the resting surface, so as to clamp the workpiece, and away from the resting surface so as to release the workpiece, whereby the workpiece may be safely transported by the vehicle. The apparatus may be mounted onto a panel truck, normally adjacent to one of its side panels, or may be mounted on a side of a pick-up type truck.

A primary objective of the present invention is to provide a workpiece carrying device and method of use having advantages not taught by the prior art.

Another objective is to provide such a device that is temporarily mounted on a truck body and holds the workpiece for transport.

A further objective is to provide such a workpiece carrying device that is able to open to accept a load and to close to clamp the load on a truck where the motion is of the scissor type.

DETAILED DESCRIPTION OF THE INVENTION

The above described drawing figures illustrate the present invention, an apparatus for carrying panel materials such as gypsum wallboard, plywood sheets, glass sheets and other materials, which will be summarily referred to herein as the “workpiece7”, where the workpiece7is held in a vertical attitude adjacent to a side or rear panel of a vehicle5such as a panel truck, shown inFIGS. 3–6or a pick-up type truck, shown inFIG. 7. Preferably, the apparatus mounts onto a truck side panel3and secures one or more sheets or panels which constitute the workpiece7so that they may be safely transported.

The present invention includes a stationary means for resting10, the resting means mounted on the exterior surface3(or panel) of the vehicle5wherein the workpiece7is rested against the resting means10. The resting means10preferably includes one or more vertical rest bars12held in contact with the truck's panel, preferably in a temporary manner by rubber contactors14, and is able to be easily removed or attached as desired. The vertical rest bars12preferably include a telescoping upper member12′ for adjustment of the vertical reach of the rest bars12to accommodate different size trucks. Telescoping bar members are well known in the art. Attachment to the vehicle5is accomplished by providing upper15and lower17clamps (FIG. 1). The upper clamp15preferably engages an upper water diverter tab6that extends along the top of most panel trucks (FIGS. 3–5), or clamps onto the side wall2of a pick-up type truck as shown inFIGS. 7 and 8with a different clamp15′ adapted for a side wall2. The lower clamp17is preferably a strap17′ with hook17″ as best seen inFIG. 1. The hook17″ is caught under the vehicle5and the strap17′ provides an adjustable reach. By tightening such strap17′ the vertical rest bars12are safely and securely engaged with the truck5. Such clamps, straps and hooks are well known in the art. The resting means10, further preferably includes horizontal rest bars19interconnecting vertical rest bars12, and these horizontal rest bars19, may be selected with a length for appropriate spacing of the vertical bars12, or the horizontal rest bars19may be telescopically adjustable for selecting such spacing. Preferably spring loaded caps19′ are provided which enable engagement of horizontal bars19quickly and simply so that assembly and disassembly and changing of the spacing between vertical bars12is enabled. Such spring loaded caps19′ are well know for engaging holes19″ in interconnecting members.

A movable means for clamping20is positioned adjacent to, and is pivotally engaged with, the resting means10as shown inFIG. 1. A means for driving30the clamping means20, in a scissors type motion, alternately toward the resting means10so as to clamp the workpiece7therebetween, and away from the resting means10so as to release the workpiece7, is enabled, whereby the workpiece7provides safe transport of the workpiece7by the vehicle5.

Preferably, the clamping means20comprises more than one, spaced-apart vertical clamping bars22mounted on horizontal pivot bars23, and the clamping bars22may be each driven by an individual one of the driving means30as shown inFIGS. 1-5. Alternately, only one of the clamping bars22is driven while the other clamping bars22are pivotally engaged with the driven clamping bar22so that all of the bars22move in synchronization (FIG. 6). Such pivotal engagement is preferably a link bar24. As best seen inFIG. 1, the pivot bars23are pivotally mounted at the lower ends of the vertical clamping bars22and are able to move over a range of horizontal angular motion as shown by arrows inFIGS. 4 and 6. The pivotal joint between pivot bar23and vertical clamping bars22, i.e., the driving means30preferably includes jack screw32, jack screw nut36, jack nut pivot rod34and jack nut anchor pivot rod38, as shown inFIG. 2. Arrow “A” depicts the motion achieved in this arrangement.

Preferably, the driving means30is at least one jack screw32as best seen inFIG. 2. The clamping means20is engaged with the at least one jack screw32for actuate motion of the clamping means20corresponding with axial rotational motion of the at least one jack screw32. See arrow “B” inFIG. 2.FIG. 4shows the use of an electric drill9, for instance, for rotating jack screw32. Manual rotation using any handy tool may alternately be used.

Preferably, the resting means10further comprises a means for restraining12″, wherein the restraining means is preferably positioned laterally to the resting means10and joined thereto, whereby the workpiece7is restrained from lateral movement along the exterior surface3of the vehicle5.FIG. 7shows the restraining means12″ positioned rearwardly on the vehicle5and extending in an attitude normal to the exterior surface3. In this manner, panels being transported, should they move, by inertial forces of motion, such as during vehicle acceleration, toward the rear of the vehicle5, will abut the restraining means12and thus be prevented from falling out of the grip of the clamping means20. Clearly, such a restraining means12″ may also be positioned forward to prevent loss of cargo during braking of the vehicle5.

As best seen inFIG. 1, the clamping bars22may have engaged at their upper terminal ends, an expanded portion22′ wherein the portion22′ provides an improvement in the clamping ability of the invention, especially for smaller panels or sheets.

The method of the present invention provides for carrying a workpiece adjacent the exterior surface of the vehicle. The method comprises mounting the stationary means for resting10on an exterior surface3of the vehicle5for resting the workpiece7against, engaging a movable means for clamping20adjacent to the resting means10, engaging a means for driving30with the resting means10and the clamping means20, rotating the driving means30, to produce a scissors type motion of the clamping means20, alternately toward the resting means10to clamp the workpiece7therebetween, and away from the resting means10so as to release the workpiece7, whereby the workpiece7may be safely transported by the vehicle.

The method further comprises the step of engaging one of the driving means30with each one of the clamping bars22or engaging only one of the clamping bars22with the driving means30and engaging at least one other of the clamping bars22with the one of the clamping bars22such that the plural clamping bars22move with joint motion.

The method further comprises the step of engaging a means for restraining12″ with the resting means10in a position whereby the workpiece7is restrained from lateral movement along the exterior surface of the vehicle5.

The method further comprises the step of engaging a means for space adjustment between the plural clamping bars.

SEQUENCE LISTING

Not applicable