FI77212C - ANORDNING FOER HANTERING AV LAEMMAR TILL LASTFORDON. - Google Patents

Description

1 77212

Equipment used to handle truck hatches

The handling of truck hatches, especially tailgates, is a major practical problem in both large and small hauliers. In a given run, the tailgate must be fitted to a single vehicle, eg when transporting bulk goods, while at other times it must be removed, eg when transporting objects longer than the platform. In one haulage, multi-meal runs may be considered during each shift. It may therefore be necessary to install and remove the tailgate several times during the same day. This work is now taking place in a very temporary way. In larger hauliers who have their own trucks, e.g. front-load or similar, this work is often carried out with such trucks. In this case, the hatches are attached to the bucket or crane of the machine and removed from the vehicle and lowered to the ground, quite often to the first best position. . i.e. in poor order. In small or medium-sized haulage companies, temporary lifting devices are often placed in the vicinity of the garage in question, e.g. a winch on a fixed boom high or the like.

All previously known methods for handling vehicle hatches are ineffective and often cause problems for the driver, e.g., in the form of losing driving because he cannot install and remove the hatch quickly enough and make the vehicle unsuitable for special driving.

Therefore, it is not certain that the truck will be immediately available to assist the individual driver of the vehicle. In addition, temporary arrangements, such as fixed winches, are difficult and time-consuming to handle, especially if they are used for more than one vehicle.

The object of the present invention is to eliminate the above-mentioned drawbacks and to provide an efficient and simple operating device for handling hatches of various trucks 2 77212. For this purpose, the device according to the invention is mainly characterized in that it comprises a plurality of, preferably four, lifting arms with a switch at one end for closing a single door and at the opposite end separately pivotally connected to a common center post or part rotatable around the center of the arms. not only vertically in a plane projecting radially from the column, but also horizontally and thus to allow a single hatch to be moved from the operating position in the vicinity of the vehicle to the transfer out of the column and inwardly towards the column, respectively.

In the drawings, Fig. 1 is a perspective view of a device according to the invention shown in connection with the removal of a hatch from a vehicle, Fig. 2 is a partial, sectional side view of the device according to Fig. 1 and Fig. 3 is a longitudinal section through a lifting arm.

In Figure 1, the number 1 generally denotes a vehicle with a conventional tilting platform 2, the load surface of which is bounded by both two side hatches 3,3 and a tailgate 4. This tailgate is detachable and can be locked to the rear corner posts 5,5 by special, known or by means of locking devices of the optional type 6,6.

The device according to the invention is generally indicated in the drawings by the number 7. This device comprises a central column which supports four lifting arms 9,9, 9 '', 9 * '* together. The post 8, which may preferably consist of a tube, is rotatably mounted relative to a base 10 comprising a plurality of suitably elongate supports or legs 11 and a central tube portion or outer portion 12 held in place by diagonal supports 13. This stand can be placed freely on any platform without the risk of tilting due to the considerable length of the supports 11. A single lifting arm 9 (see also Figures 2-3) is connected at its inner end 3 77212 to a column part 8 by a joint 14 which allows the arm to turn vertically. A suitably sturdy, cantilever-like holder 15 is fitted to the column part 8, which supports a force generation mechanism formed by means of a lever 16 of a hand-operated hydraulic cylinder 17 of a type known per se or optional. By means of this mechanism 17, the individual lifting arm can be raised or lowered separately with respect to the column.

At the outer or free end of each lifting arm there is a switch, generally indicated at 18, which in a preferred embodiment consists of two relatively short chain pieces, each provided with its own hook 19, which can be attached to fixed loops 20 attached to the door 4. As shown in the drawings, each lifting arm comprises two telescopically displaceable parts 21, 22, suitably consisting of box or rectangular profiles, one of which is slightly thicker than the other. To move the thinner profile 22 relative to the thicker profile 21, a screw 23 is arranged on the outer side of the latter, which can be made to rotate by means of the palm 24. An internally threaded body 25 is fitted to the screw, which is connected to the inner thin profile 22 via a slot 26 in the outer profile 21. One or more bearings, e.g. roller or plain bearings 27, can be fitted to facilitate the transfer of the inner profile.

It can be seen from the above that the free end of a single lifting arm with a clutch 18 can move to arbitrary points in the space due to the pivoting of the arm both vertically and horizontally and the fact that the clutch arm 22 is telescopically displaceable with respect to the articulated arm 21.

When the vehicle arrives at the device according to the invention to remove the tailgate 4, the free lifting arm 9 is pivoted to the hatch area, after which the switch 18 is moved in close proximity to the loops 20, possibly both by pivoting the lifting arm relative to the joint 14 by mechanism 17 and moving arm 22 by means of a screw mechanism 23. In the next step, the hooks 19 are attached to the loops 20, after which the lifting arm is turned upwards until it supports the hatch. The door is then removed from the corner posts 5, 5 by opening the locks 6,6. Finally, the hatch can be turned from the area close to the vehicle 1 to a position far from it (see hatch 4 in Figure 1), whereby the new free lifting arm is turned to the standby position.

One or more hatches can thus be stored with the device according to the invention and, when the vehicle arrives, conveniently turned to it and installed in the vehicle, whereby the opposite procedure is followed with regard to the removal described above.

It should be noted that the handling of the device can simply be taken care of by a single user, e.g. due to the location of the operating lever 16 and the palm 24 close to each other.

Claims (4)

5,77212 Device for handling truck hatches, characterized in that it comprises a plurality, preferably four I II III lifting arms (9, 9, 9, 9), at one end of which there is a switch (18) for closing a single hatch (4), and which are separately pivotally connected at the opposite end to a common:. a center post or part (8) which can rotate about a center to allow the arms to be pivoted not only vertically in a plane projecting radially from the post but also horizontally and thus to allow a single door to be moved from the operating position in the vicinity of the vehicle (1) to a distant storage position and vice versa; that the individual lifting arm (9) comprises two mutually displaceable parts (21, 22) adapted to allow the clutch (18) to be moved out of the column and inwards towards the column, respectively. Device according to Claim 1, characterized in that the column part (8) is rotatably mounted in its lower part on a base V. on a free-standing stand (10). Device according to Claim 1 or 2, characterized in. . I I I I I I · .; that for each lifting arm (9,9,9, 9) there is a column. ; a suitably arranged bracket-like holder (15) for a power generation mechanism (17), e.g. for a manual hydraulic cylinder, for separate lifting of a single arm and for lowering, respectively. Device according to one of the preceding claims, characterized in that the coupling comprises two flexible parts with a hook, e.g. a chain (18).