SE414020B

SE414020B - Raising and lowering material handling bridge

Info

Publication number: SE414020B
Application number: SE7807960A
Authority: SE
Inventors: Kurt Tage Lennart Rosengren
Original assignee: Rosengren Lennart
Priority date: 1978-07-19
Filing date: 1978-07-19
Publication date: 1980-07-07
Also published as: SE7807960L

Abstract

The present invention concerns a raising and lowering material handling bridge which is provided with rubber fenders to protect the moving parts of the bridge. The fenders can move between an extended position of rest, in which they can prevent a truck which is backing up against the bridge from damaging it, and a retracted position in which unhindered loading and unloading of the vehicle is possible. The fenders are operated by powerful hydraulic cylinders, which can withstand the forces produced when the truck backs up against the bridge. As an alternative, the fenders are moved by means of a collapsible toggle joint or are able to rotate. <IMAGE>

Description

15 20 25 30 35 40 . veeiseo-s 2 exempelvis mellan 0,5 m och 3 m. 15 20 25 30 35 40. veeiseo-s 2 for example between 0.5 m and 3 m.

Den ovan beskrivna typen av lastbrygga fungerar tillfredsställande i de allra flesta tillämpningar. Emellertid lastas ibland lastbilar med lastpallar, som är i det närmaste lika breda som lastfordonet, exempelvis 2,04 m. Om lastkajen befinner sig högre än lastflakets yta och således lastbryggans yttre kant sänkes lägre än dess inre kant kommer fendrarna att vara i vägen för lossningen. Fendrarna måste dimensioneras för att upptaga de stora krafter som kan uppstå när en tung lastbil med släp backar mot lastbryggan. Dessa krafter kan ha storleksordningen 30 ton.The type of loading dock described above works satisfactorily in most applications. However, trucks are sometimes loaded with pallets that are almost as wide as the truck, for example 2.04 m. If the loading dock is higher than the surface of the loading platform and thus the outer edge of the loading dock is lowered lower than its inner edge, the fenders will be in the way of unloading. . The fenders must be dimensioned to absorb the large forces that can occur when a heavy truck with a trailer backs against the loading dock. These forces can be in the order of 30 tons.

Således fästes fendrarna normalt vid stativet. Vidare måste fendrarna befinna sig innanför lastbilens ytterkanter vilket medför ovannämnda olägenhet. Ändamålet med föreliggande uppfinning är att åstadkomma en lastbrygga som medger avlastning av lastbilar med lastpallar i det närmaste lika med lastbilens bredd och när lastflaket befinner sig under nivån för lastkajen. Enligt före- liggande uppfinning löses detta problem därigenom att fendrarna är förbundna med en dämpningsanordning, vilken är svängbart förbunden med stativet intill lastkajen; och att fendrarna är anordnade på yttre änden av en väsentligen horisontell balk, som är styrd medelst styrningar anordnade på bryggplåtens undersida så att balken är rörlig parallellt med bryggplåtens längdriktning; samt att fendrarna är man- övrerbara medelst en drivanordning, som är anordnad att förflytta fendrarna mellan ett utskjutet läge utskjutande förbi nämnda främre vägg, i och för upptagande av de stötar och krafter som uppstår när fordonet backar mot lastkajen, och ett in- draget läge, där fendrarna befinner sig pà avstånd från fordonet och innanför nämnda främre-vägg och är ur vägen vid en kraftig sänkning av lastbryggan.Thus, the fenders are normally attached to the stand. Furthermore, the fenders must be located inside the outer edges of the truck, which causes the above-mentioned inconvenience. The object of the present invention is to provide a loading dock which allows unloading of trucks with pallets approximately equal to the width of the truck and when the load platform is below the level of the loading dock. According to the present invention, this problem is solved in that the fenders are connected to a damping device, which is pivotally connected to the frame next to the loading dock; and that the fenders are arranged on the outer end of a substantially horizontal beam, which is guided by guides arranged on the underside of the bridge plate so that the beam is movable parallel to the longitudinal direction of the bridge plate; and that the fenders are manoeuvrable by means of a drive device, which is arranged to move the fenders between an extended position projecting past said front wall, in order to absorb the shocks and forces which occur when the vehicle backs towards the loading dock, and a retracted position , where the fenders are at a distance from the vehicle and inside said front wall and are out of the way in the event of a sharp lowering of the loading dock.

I exemplifierande syfte beskrives här nedan en föredragen utföringsform av upp- finningen i detalj under hänvisning till bifogade ritning, som visar ett tvärsnitt genom en lastbrygga enligt föreliggande uppfinning.By way of example, a preferred embodiment of the invention is described below in detail with reference to the accompanying drawing, which shows a cross section through a loading dock according to the present invention.

Lastbryggan enligt uppfinningen innefattar ett stativ l, som är fäst vid en lastkaj (ej visad) exempelvis genom ingjutning av delar av stativet i lastkajen.The loading bridge according to the invention comprises a frame 1, which is attached to a loading quay (not shown), for example by casting parts of the frame into the loading quay.

Stativet inbegriper en tvärgående fästbalk 2, som befinner sig parallellt och in- till lastkajens kant. En bryggplåt 3 är vridbart anordnad vid fästbalken 2 och sträcker sig väsentligen horisontellt utåt från lastkajen. En läpp 4 är vridbart anordnad vid bryggplâtens yttre ände. Bryggplåten 3 resp. läppen 4 manövreras medelst hydrauliska cylindrar 5 och 6. I viloläge stöder den nedfällda läppen mot en stopp- klack 7 hos stativet. Två bumprar i form av gummifendrar 8 är vardera anordnade i hållare 9, vilka uppbäres på de yttre ändarna av tvâ väsentligen horisontellt och parallellt med bryggplâtens längdriktning förlöpande fyrkantbalkar l0. Balkarna är förflyttbara i sin längdriktning i styrningar ll anordnade under bryggplåten 3. Styr- ningen består av medelst kullager lagrade stålrullar l2. Balkens l0 inre ände är för- bunden med kolvstången l3 hos en hydraulisk cylinder l4, vars hölje är vridbart för- bundet med ett öra 15, som är fastsvetsat på fästbalken 2. Hydraulcylindrarna 5, 6,The frame comprises a transverse mounting beam 2, which is located parallel and in to the edge of the loading dock. A bridge plate 3 is rotatably arranged at the fastening beam 2 and extends substantially horizontally outwards from the loading quay. A lip 4 is rotatably arranged at the outer end of the bridge plate. The brewing plate 3 resp. the lip 4 is actuated by means of hydraulic cylinders 5 and 6. In the rest position, the lowered lip abuts against a stop lug 7 of the frame. Two bumpers in the form of rubber fenders 8 are each arranged in holders 9, which are supported on the outer ends by two square beams 10 extending substantially horizontally and parallel to the longitudinal direction of the bridge plate. The beams are movable in their longitudinal direction in guides l1 arranged under the bridge plate 3. The guide consists of steel rollers l2 stored by means of ball bearings. The inner end of the beam 10 is connected to the piston rod 13 of a hydraulic cylinder 14, the housing of which is rotatably connected to an ear 15, which is welded to the mounting beam 2. The hydraulic cylinders 5, 6,

Claims

1. 0 15 20 25 30 35 40 3 78079606 14 is operated by means of an oil unit 16 with pump and valves. Conveniently, the function is electrically controlled with solenoid valves and a software. The loading dock works as follows. A truck is backed against the loading dock until the truck is stopped by the fenders 8. The cylinders 14 are dimensioned to be able to withstand forces of up to 30 tons / pc with the valves closed. When the truck has stopped, the valves for the cylinder and the piston rod 13 and the beam 10 are retracted so that the fender 8 is inside the outer edge of the bridge plate. Then the bridge plate is raised by means of the cylinder 5 to its upper position, which is shown in broken lines, and the lip 4 is folded out by means of the cylinder 6 to form an extension of the bridge plate. The bridge plate with the lip extended is lowered until the lip rests on the load platform (the lower one with dashed lines showed the position). The loading dock is now ready for unloading or loading. After the operation is completed, the bridge plate is raised again to the upper position, after which the lip is swung in and the bridge plate is lowered to the rest position with the edge of the lip resting against the stop lug 7. Finally, the fender 8 is extended by the cylinder 14 to the initial position. The above functions can be controlled automatically by a software. Other ways of moving the fenders are also conceivable, such as by means of pneumatic cylinders or mechanical movement by means of foldable arms. Although the guide 11 shown is currently preferred, the fenders may be arranged rotatable about an axis for pivoting the fenders. One skilled in the art will appreciate that the invention may be modified in many ways within the scope of the invention. CLAIMS Claimable and lowerable loading dock at loading dock for loading and unloading vehicles of different heights on their load platform, comprising a stand (1) with a front wall (7); a bridge plate (3), which at its edge closest to the loading dock is rotatably (15) attached to the frame and at its opposite end includes a rotatable lip (4) which can be pivoted between a recessed position perpendicular to the bridge plate (3), in which position the lip constitutes an extension of the front wall (7) of the stand, and a folded-out position, the lip constituting an extension of the bridge plate; and fenders (8, 9) for absorbing shocks and forces when the vehicle is reversing towards the loading dock, characterized in that the fenders (8, 9) are connected to a damping device (13, 14), which is pivotally connected (15) with the stand next to the loading dock; and that the fenders are arranged on the outer end of a substantially horizontal beam (10), which is guided by guides (11, 12) arranged on the underside of the bridge plate (3) so that the beam (10) is movable parallel to the longitudinal direction of the bridge plate; and that the fenders (8, 9) are operable by means of a drive device (16), which is arranged to move the fenders between an extended position projecting past said front wall (7), in order to absorb the shocks and forces which occur when the vehicle reverses towards the loading dock, and a retracted position, where the fenders are at a distance from the vehicle and inside said front wall and are out of the way in the event of a sharp lowering of the loading dock.