DE3038321A1 - DEVICE FOR AUTOMATICALLY OPENING AND CLOSING THE REAR PANEL OF TIPPER BODIES FOR TRUCKS - Google Patents

Description

COHAUSZ & FLORACK

PATENT AGENCY OFFICE 3 U 3 Q 3 2 1

SCHUMANNSTR. 97 · D-4000 DÜSSELDORF

Telephone: (02 U) 683346 Telex: 08586513 cop d

PATENT LAWYERS:
Dipl.-Ing. W. COHAUSZ Dipl.-Ing. R. KNAUF Dr.-Ing, Dipl.-Wirtsch.-Ing. A. GERBER Dipl.-Ing. HB COHAUSZ

OFFICINE ROMANAZZI SpA
No. 1072, Via Tiburtina
I-OO156 Rome (Italy

Device for the automatic opening and closing of the rear wall of tipping platforms for trucks

The object of this invention is a device for automatically opening and closing the rear wall of tipping platforms of trucks.

As is known, the tipping bed is tilted during unloading and the weight of the load causes it to open the rear panel, which is attached to the top by hinges. When the unloading process is complete, the flatbed is in its brought back horizontal position, and the rear wall must

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locked by hand.

The purpose of the invention is to eliminate the manual work mentioned and to open the rear wall when unloading as well as closing the rear wall when returning the tipping bed to its starting position to effect automatically after discharge.

According to the invention a device is provided which in combination comprises a pair of rear pawls fixedly connected to one on the vehicle frame shaft mounted parallel to the rear wall, a two-armed lever with connection to said shaft and eccentric means, which are also attached to the vehicle frame and intended to use the pawls mentioned when tilting the To release the platform for unloading and when the platform is in its end position of the return, in Lock position to latch,

These eccentric means consist of a profiled holder on which one end of the two-armed lever is guided the other end is connected to the mentioned drive shaft via a rod or a tension member.

According to the invention, said profiled holder has two sections with different curvatures and cooperates with a ratchet lock, which consists of a pair of hooks, the pivot point of which is at the top End of said bracket and which are provided with retaining teeth? they serve the purpose of being a free Slide the two-armed lever down (tilt path)

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p
ORIGINAL INSPECTED

enable the profiled support to be extended when the said lever goes up again (phase of the flatbed return) until the named Lever in cooperation with one or more springs that stress the pawls in the closed position, in the rear wall locking position clicks into place.

The invention will now be described with reference to the attached drawings which, for the purpose of illustration, without representing any limitation, represent a preferred embodiment of the invention.

The following applies to the drawings:

Figure 1 is a schematic sectional view showing the device in the backplane locking position;

- Figure 2 is a perspective view showing the profiled bracket with the hook-shaped eccentric and the two-armed lever are shown;

Figure 3 is a view similar to Figure 1 showing the initial phase of tilting;

- Figures 3 and 4 show the end phase of the tilt and the beginning of the return movement;

- Figure 6 shows an intermediate phase of the return flow;

-Figure 7 shows the end phase of the flatbed return with automatic locking of the rear wall.

With reference to Fig. 1, at 1 the loading platform

( Ä.c3n sgI before the tipping bed with turning center Dei O is shown.

The rear wall shown at 2 is hinged at the top in a conventional manner and carries at the lower end

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a certain number of noses 3, which with a corresponding Number of pawls 4 come into engagement, which are firmly attached to the frame 6 of the vehicle (the flatbed) rotatably Shaft 5 are connected.

The shaft 5 and the pawls 4 are stressed in the blocking position by one or more springs 7, and the shaft 5 is in turn firmly connected to an arm or a crank arm 8 which is articulated at 9 to a rod 10, the other end 11 of which is articulated is connected to a two-armed lever 12; this has its pivot point at 13 in a fork 14, which is firmly connected to the cross sleeper (cross member) ¹ S of the frame.

The two-armed lever 12 (see also Fig. 2) carries a pair of rollers 16, which are in the position of Fig. 1 support an upper profiling (curve, curved path) 17 of the profiled holder 18. In continuation of the above Profiling 17 (support profiling), the holder 18 has two sliding surfaces (curves, curved paths) 19, which are profiled in the shape of an arc of a circle and have the center at O.

At the top of the bracket 18 (Fig. 2) is at a pair of hook eccentrics 21 fastened in hinges which have an incision 22 in which the locking tooth is located 23 can insert. The foot of the bracket 18 (Fig. 1) is via a welded connection to a component 24 of the Vehicle anchored.

The working method is as follows: Starting from the position shown in Fig. 1 (platform horizontal, rear

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wall 2 closed, latches 4 locked), the tipping process is initiated and the loading area 1 begins to rotate 0. The rollers 16 of the lever 12 are on the Support surface 17 of the bracket 18. Consequently, the lever 12 is forced to rotate counterclockwise around the pivot point 13 to rotate, and the rod 10 releases the pawls 4 from the lugs 3 against the action of the spring 7, whereby the rear panel is unlocked (Fig. 3).

As the platform continues to rotate by 0, the rollers 16 move from the support position 17 onto the sliding profile 19 (Fig. 3). Since this profiling is an arc with a center at 0, remains the two-armed lever 12 remains stationary in the position it has reached, which also applies to the pawls 4. The roles 16 hit the hook eccentric 21, which can rotate about the pivot point 20, and overcome during the downward movement them, whereupon the tilting process continues up to the position illustrated in Fig. 4.

When the unloading process is complete, the platform starts to move up again (Fig. 5) and the rollers 16 run in the opposite sense via the profiled surfaces 19.

When the rollers 16 hit the hook eccentric 21 (Fig. 6), these will rotate in the opposite direction Forced clockwise until the locking teeth 23 sit in the corresponding seats 22 and cause a lock. In this position, the hook eccentric 21 form the continuation of the profiled guide 19, and the

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Rollers 16 can continue their way up.

When the bed is at the end of the return path is located, the rollers 16 are at the top of the hooks 21, as shown in Fig. 7 in dashed lines, whereupon the Lift the rollers off the hooks 21, which turn back into the starting position and engage in the support position 17. At the same time, in cooperation with the spring 7, which is relieved of pressure, the shaft 10 is created by the rod 5 rotated, and the pawls 4 snap into the locking position, as in Fig. 7 with solid lines shown.

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Claims (5)

COHAUSZ & FLORACK PATENT ANWALTSBÜRO jU JO JA SCHUMANNSTR. 97. D-4000 DÜSSELDORF Telephone:! 0211) 683346 Telex: 08586513 cop d PATENTANWÄLTE: Dipl.-Ing. W. COHAUSZ Dipl.-Ing. R. KNAUF Dr.-Ing., Dipl.-Wirtsch.-Ing. A. GERBER Dipl.-Ing. H. B. COHAUSZ 10/8/80 claims 1. Device for automatic opening and closing the rear wall of tipping platforms for trucks, characterized by a plurality of pawls (4) fixed to the rear wall Connection to a shaft attached to the frame of the vehicle or the flatbed and parallel to the rear wall (5), a two-armed lever (12) with connection to said shaft (5), and eccentric means (18, 21), the are attached to the frame of the vehicle and, according to their purpose, the latches (4) when tipping the bed for unloading and snap it into the locking position when the platform is at the end of its return path. 2. Apparatus according to claim 1, characterized that the eccentric means have a profiled holder (18) on which one end of the two-armed lever (12) is guided, the other end of this lever via a rod (10) or a tension member with the drive shaft (5) of the Pawls (4) is in communication. 34 276
HC / Be 130017/0784 ORIGINAL INSPECTED 3. Apparatus according to claim 1 or 2, characterized characterized in that the profiled holder (18) has two routes or guide curves has different curvature and interacts with a ratchet, the at least one Has hook eccentric (21), which has its pivot point at the apex of this bracket, which is provided with a retaining tooth (23) is formed. 4. Device according to one of claims 1 to 3, characterized in that the Bracket (18) has two curvatures, a first apex or support profile on which at least one during the first stretch of the tilting path the roller (16) carried by the two-armed lever rests, as well as a second, circular profile centered on the axis of rotation of the bed. 5. Device according to claim 3 or 4, characterized characterized in that the hook eccentrics (21) are profiled so that they are in the tilting phase allow free sliding of the guide roller (s) (16) of the lever (12) downwards and an extension said profiled holder (18) 130017/0784 the upward travel of the lever (12) on return represent the platform until the lever (12) engages in the locking position for the rear wall, and in cooperation with one or more springs (7) which act on the pawls (4) in the closed position . 130017/0784