DE2903696A1 - DEVICE FOR TRANSPORTING AND TILTING A LOAD BY USING A FORKLIFT - Google Patents

Description

DIPLüMI! 'JÖ' -: NIE'JR

HELMUT LAMPREOHT

PAT EN TA N WA LT
CORNELIUSSTR. 42 D-800O MÜNCHEN 5 -TTEL. 089/240775 - TELEX 5 28425

2675-76

HENON Bernard
Les Rivelottes
Route de Thilay
Montherme (Ardennes)

France

Device for transporting and tipping a load by means of a forklift

The invention relates to a device for transporting and tilting a load by means of a fork which is provided with a tiltable fork Lift truck, which comprises a longitudinally extending sleeve-like element that is suitable in his Inside the fork of the forklift and a load pick-up, which are in a transport division on the sleeve

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90983B / 0558

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ORIGINAL INSPECTED

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like element rests and about a transverse axis in a tilted position is pivotable, the transition from one position to the other by changing the inclination of the sleeve-like Element can be brought about due to a change in the inclination of the fork.

It is already known per se to bring about the tilting by inclining the fork of the forklift truck, with baskets in particular or buckets are known which can be connected to the fork of a forklift via a sleeve-like element that this fork receives and on which the basket or the bucket is movable about an axis that is beyond the forklift in terms of cuif the center of gravity of the basket or bucket and its contents as the fork moves further away from the forklift extends in a rising direction from bottom to top, with the axis on the other hand on this side of the median line is when the fork is inclined in the opposite direction, the transition from the first to the second position causing the tipping.

These devices have a disadvantage in that their mode of operation is very dependent on the type of loading of the basket or bucket is dependent. In fact, the angular deflection of the fork of the forklift is small, it is equally small Shifting the center of gravity of the basket or the bucket during the transition from the transport position to the tilt position and the The manner in which the basket or bucket is loaded can have a significant effect on performance. if namely the load is shifted towards the forklift truck, the center of gravity can be independent of the inclination of the fork in

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the given limits on this side of the pivot axis remain and you can not bring about any tilting. If in contrast For this purpose, the load has been shifted forward, i.e. the center of gravity is beyond what is normally intended for the transport position Position, there is a risk that the device is unstable and suddenly tilts when the median line is beyond the pivot axis.

Another disadvantage of such a swivel construction is that it is only effective when the center of gravity of the load or the basket is so far above the swivel axis that the change in the inclination of the lift truck would result in a sufficient shift when leaving the transport position of the center of gravity τ. towards the front, so that the overturning moment transmitted to the basket or bucket and the load is sufficient not only to cause the overturning, but also to overcome the friction, the extent of which is not negligible in such devices Construction is generally robust _, with a view to use under heavy working conditions, such as on construction sites or in quarries.

In particular, the tilting of flat loads or a basket or the bucket cannot replace the pl ittform because of the center of gravity relatively far below η

In a far verbreiceten wiiiterentwickelten tilting method, the transition of the center of gravity of a transport position in which it is located behind the pivot axis is, in a tilted position, in which it lies in front of the pivot axis ₅ in a dynamic type instead, under effect of inertia. Of the

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The basket or bucket stores the energy while it is used to attach the fork to the front over a certain distance sleeve-shaped element serving on the fork lift truck rolls along before it is suddenly braked by stops located in its lower area with the Effect that a tilting movement takes place around these stops.

In addition to the disadvantages already mentioned above, such a construction has the following problems: 1 that on the forklift, like detrimental dynamic forces are also exerted on the mechanics and the operator of the machine.

The object of the present invention is to provide a device of Design 30 mentioned at the beginning that the tilting at inclination of the fork of the forklift takes place in a new way which overcomes the disadvantages mentioned.

For this purpose, the invention provides that the load pick-up with the sleeve-shaped element receiving the fork lift truck is connected by a pivot axis, which is always behind the median line in the transport position, the Tilting is prevented by the fact that the front part of the load bearing rests in the transport position on a support which for this purpose at the front end of the sleeve-shaped element is provided, i.e. at that end of the sleeve-shaped element which is furthest away from the forklift. From this it follows that the transport position is a stable position, with no consideration has to be taken of the type of loading of the load pick-up.

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The tilting of the load pick-up and the load is caused by the fact that the load pick-up and the pivot axis, which with each other is firmly connected, can be displaced under the influence of gravity by a translational movement of the load pick-up, if you tilt the lift stacker forward, whereby the The pivot axis is accelerated in the direction of the support until the pivot axis and the support are in the immediate vicinity which naturally causes the tilting movement under the influence of gravity, because the center of gravity of the load and the load bearing, which lies in front of the swivel axis, then also lies in front of the support that is thereby achieved can be regarded as removable.

Such a tilting construction works independently of the altitude the load is satisfactory and it is possible to use a platform designed as a load pick-up even when it is unloaded State of tilting, moreover, it does not lead to a reshaping of a portion of the recorded movement, as in the case of the above mentioned known construction and its mode of operation is much gentler than in this known case.

A sensible embodiment of the device according to the invention allows the load carrier to be turned completely during the tilting movement and then this load carrier by the movement alone of the forklift into the transport position without manual intervention, which makes the handling of this device especially relieved.

To solve the problem, the invention consists in a

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Device of the type described initially in that the sleeve-like element in the immediate vicinity of its farthest at least the transverse end remote from the forklift truck has a support area for the load pick-up that the load pick-up has means in its lower region, which a define transverse pivot axis, which is at least in the transport position between the center of gravity of the load pick-up and the load possibly carried by it and the transverse, the forklift in the transport position first located end of the load bearing that this axis opposite the sleeve-like element in its longitudinal direction by joint inclination of the fork and the sleeve-like element is movable between a transport position, in which this center of gravity is closer to the forklift than the support area, and a tilted position in which this center of gravity is located beyond the support area in relation to the forklift and in which this axis is in the immediate vicinity this support area is located.

This construction is characterized by a reliable and, compared to known constructions, gentler operation, as well as the possibility of a reliable tilting movement even with a relatively low center of gravity to obtain.

Advantageous embodiments of the invention emerge from the subclaims ^

With the aid of the following description of an exemplary embodiment of the invention shown in the drawing, this will be explained in more detail. 9 fl 3 S 3 S / ΰ 5 S 9 ^ _{7 w}

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It shows:

1 shows a device connected to a forklift truck for transporting and tilting a load in its transport position in side view and

FIG. 2 shows the device according to FIG. 1 in its tilted position in a side view.

In one case, as in the other, are the forklift forks and a shown on its attached, sleeve-like element in a horizontal position, i.e. in a limit position of the transport position at the transition from the transport position to the tilt position.

Shown only schematically and denoted by 1 is a forklift, the vertical guide 2 of which supports a fork 3 the vertical position shown in full lines and marked with the reference numeral 2 can be pivoted to both sides is, either in a bottom-up and back-up position against the forklift truck, the is indicated by a dash-dotted line 2a in Fig. 1, or in a from bottom to top and opposite the forklift forward position, which is indicated as an extreme pivoting position by a dash-dotted line 2b in FIG. The positions of the fork prongs of the fork 3 corresponding to positions 2, 2a and 2b of the vertical guide 2 are shown with 3, 3a and 3b, it being assumed that these prongs run at right angles to the vertical guide 2 and after protrude from the front of the forklift 1.

The inventive device 4 comprises in a known manner a sleeve-like element 5, which one in his

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Enclosed internally formed longitudinal guide which is suitable for receiving the fork 3 of the forklift 1.

The device 4 also comprises a load carrier 6, which is in present case is designed in the form of a bucket which has a flat bottom 7, which is in the transport position extends parallel to the sleeve-like element 5 and to the prongs of the fork 3, and a rear wall 8, which is at right angles runs to the floor 7 and is in the transport position in the immediate vicinity of the vertical guide 2 of the forklift 1, as well as a front wall 9, which is opposite the rear wall 8 and with increasing distance from the floor 7 its distance enlarged from the rear wall 8, and finally two side walls 10, which the rear wall 8 and the front wall 9 and the Connect the bottom 7 with each other and essentially at right angles to these three aforementioned wall elements of the load carrier 6 run.

In the immediate vicinity of its front edge 11, ie in the immediate vicinity of its end furthest from the forklift 1, the sleeve-like element 5 carries at least one roller 12 which is freely rotatable on a horizontal axis which extends transversely to the longitudinal direction of the sleeve-like element 5 , ie transversely to the direction of the prongs of the fork 3 received by this sleeve-like element 5 the tilt position forms a runway for this role, as will be seen below. _Q

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On the other hand, the sleeve-like element 5 carries laterally on both sides of the area occupied by the prongs of the fork 3 two longitudinal guides 14, which are formed by a U-shaped rail, which two parallel to each other and to the longitudinal direction of the sleeve-like element 5 has parallel legs 15 and 16, which are thus in the main direction of the prongs 3 extend when they engage in the interior of the sleeve-like element 5. The legs 15 and 16 are in close proximity the front edge 11 of the sleeve-like element 5 is connected to one another by a semicircular section 17.

Each of the guides 14 is intended to be inside, i. between the legs 15 and 16 to receive a roller 18, the is supported by a side arm 19 of the load carrier 6 under the bottom 7 and on this side arm 19 to a Axis of the roller 12 is rotatably mounted parallel axis. The roller 18 has a diameter which is the distance between the two legs 15 and 16 of the rail forming the longitudinal guide 14 is adjacent, such that the roller 18 in the transport position rests on the lower leg 16 and in the direction of movement upwards through the upper leg 15 is retained, namely during the tilting movement and when, after tilting, the load carrier 6 by an actuation of the forklift 1 is returned to the transport position.

According to a characteristic feature of the invention, the Axis of rotation of the roller 18, which is located on the other side of the load carrier 6 with the axis of rotation of the analog one Roll collapses, a movable pivot axis for the load carrier 6 with respect to a pivoting movement relative to the

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sleeve-like element 5. This pivot axis is located between the center of gravity of the center of gravity C of the loaded or unloaded load carrier 6 and the rear end of the load carrier 6, which is determined by the rear wall 8 when the The device is in the transport position shown in FIG. In other words, is located at the one shown Example the axis for the rotation of the roller 18 relative to the load carrier 6 below the rear half of the floor 7 and for example a third of the length of this base 7 away from the rear wall 8. Moreover, the length of the side arm is 19 chosen so that the bottom 7 is substantially parallel to the general direction of the longitudinal guides 14 and the top 13 of the element 5 extends when the device is in the transport position.

For safety reasons, the device also comprises a stop 20 on the sleeve-like element 5 over the top 13 of the element 5 in close proximity to the rear Edge 21 of this element protrudes, i.e. in the area of that end which is closest to the forklift 1, to the rear wall 8 of the load carrier 6 to come into contact when its bottom 7 covers the top 13 of the sleeve-like element 5 to a maximum extent. In addition, the rear wall 8 carries the counterpart 22 of a pawl 23, which in the connection area of the fork 3 with the Vertical guide 2 of the forklift 1 is arranged to lock the load carrier 6 in the position, if desired, in which its rear wall 8 rests against the stop 20 of the element 5, which corresponds to the transport position in which the vertical guide 2 of the forklift 1 any position between that indicated schematically by 2a and that denoted by 2

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Position, and in which the prongs of the fork the corresponding Assume positions between the position indicated schematically by 3a and 3.

If you want to initiate the tilting of the load carrier 6 starting from the transport position, you unlock the pawl 23 and inclines the vertical guide 2 increasingly in the position 2b, wherein the prongs of the fork 3 then gradually pass into the position which is inclined forward and is indicated schematically by 3b.

The load carrier 6, whose only connection with the sleeve-like element 5 is then formed in that the bottom 7 rests on the roller 12 and the rollers 18 on the respective lower leg 16 of the rails forming the guides 14 rests, begins to roll in the direction of arrow 25 in Fig. 1 on the element 5, i.e. parallel to the main direction of the Guides 14, in such a way that the distance from the forklift 1 increases. Rolls during this movement the floor 7 on the roller 12 and the rollers 18 roll in the longitudinal guides 14.

During the shift in the direction of arrow 25, the center of gravity passes through the center of gravity C of the load carrier 6 and the possibly existing load increasingly in the area beyond that which is in contact with the floor 7 of the load carrier 6 Generating line of the roller 12 until the load carrier 6 reaches a position in which the axis 26 for rotation the rollers 18 opposite the side arms 19 of the load carrier 6, the axis 27 for the rotation of the roller 12 relative to the sleeve-like Element 5 and those with the floor 7 of the load carrier 6 in

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Contact standing surface line of the roller 12 lie in one plane. In this schematically in Fig. 2 by a dash-dotted line Line indicated position, the roller 12 no longer forms a support around a movement of the load carrier 6 to prevent below, this rather swings about a swivel axis, which is defined by the axis 26 about which the rollers 18 opposite the side arms 19 of the load carrier are movable in the position in which this axis 26 arrives in this way. The roles then preferably lie 18 already on the semicircular sections 17 of the rails which form the longitudinal guides 14.

This pivoting movement, which is indicated by an arrow in FIG. 2, converts the load carrier 6 into that in FIG. 2 position shown in full lines, in which, as can be seen, this load carrier 6 is completely tilted and practically with its open side 30, which forms its upper side in the transport position, pointing completely downwards.

It should be noted that the shape of the load carrier 6 has no influence exerts on the tilting movement and that therefore each shape of the load carrier 6 tilts in the manner peculiar to the invention as also the loading takes place, provided that one leaves the center of gravity C in front of the axis of rotation of the rollers 18 when the device is in the transport position.

The return from that shown in Fig. 2 in full lines extreme tilting position into the transport position can easily be brought about by a corresponding maneuver of the forklift. A first maneuver for this return is that

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then, when the lowest-lying area 31 of the load carrier 6 has come into contact with any support, in particular also with the floor, the forklift 1 is set back and the fork 3 is moved in such a way that the load carrier 6 is unrolled on the support, wherein one then increasingly lowers the fork 3 to the load carrier 6, which then partially on the support and partly over the rollers 18 on the sleeve-like element 5 aufru ¹ t, to convert it into a position which is close to that position shown in Fig. 2 is shown in dash-dotted lines before it is transferred to the transport position shown in Fig. 1, namely by a forward movement of the lifting device with a return of the fork 3 from the position shown schematically and designated by 3b into the position shown schematically and designated by 3a Position. Once the rear wall 8 rests against the stop 20 of the element 5, the load carrier 6 is locked in the transport position by the pawl 23.

In the course of this return and in the course of the intermediate phase of the tilting movement when the center of gravity of the load carrier 6 and the load possibly carried by it is located in front of the surface line of the roller 12 which is in contact with the floor 7, but the axis 26 is moved backwards again in relation to the plane defined by the axis 27 and this surface line 28 has and wherein the load carrier 6 therefore still overhangs with respect to the roller 12, which thereby the task of a holding roller takes over, the upper leg 15 of the rail forming the longitudinal guide holds back the rollers 18, which move upwards put on this splint.

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The invention can be subjected to numerous modifications with regard to the embodiment described and shown, in particular as regards the shape of the load carrier 6 as described above. Other forms of the Load carrier can be considered, for example the shape of an Eaggarschaufe1 or, more generally, the shape of a respective one Purpose of use serving and adapted vessel, in the case that the load carrier is a platform, this Platform could include a locking system that allows classic storage containers to be attached to the platform and to tilt them by means of the device according to the invention.

The shape and embodiment of the support zones of the load carrier 6 on the element 5 with mutually variable support width can also be the subject of modifications, in particular depending on the shape of the load carrier 6 and the conditions under which the device is intended to be used, in particular also depending on the Extent of the stresses that occur during transport and the tipping process. In order to facilitate the movement of the device according to the invention above the ground, three or four wheels can also be attached under the underside of the sleeve-like element, of which one or two can be pivoted and guided at one end of the device by means of a guide and drawbar, ιτιά with a hitch at the opposite end of the device to pull one or more devices in a train by means of a vehicle, such as a forklift, designed to tip the load carriers at the end of the route.

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Claims (9)

2902696 DI ° LOMINGENIEUR HELMUT LAMPRECHT PATENTANWALT CORNELIUSSTR. 42 ■ D-8OOO MUNICH 5 · TEL. O89 / 24O7 75 · TELEX 5 28425 2675-76 Henon Bernard Claims: 1. Device for transporting and tipping a load by means of a forklift truck equipped with a tiltable fork, which comprises a longitudinally extending sleeve-like element which is suitable for the fork of the forklift in its interior and a '.astaufnähme, which in a Transport position rests on the sleeve-like element and is pivotable about a transverse axis into a tilted position, wherein the transition from one position to the other can be brought about by changing the inclination of the sleeve-like element due to a change in the inclination of the fork, characterized in that the sleeve-like element (5) in the immediate vicinity of its transverse end furthest away from the forklift (1) (11) has at least one support area (12) for the load pick-up (6) that the load pick-up in its lower area Has means (18) which define a transverse pivot axis (26) which is at least in the transport position between the center of gravity of the load pick-up (6) and the load it may carry and the transverse, next to the forklift (1) in the transport position The end (21) of the load pick-up (6) is located so that this axis (26) - 2 909835/0 559 POSTAL CHECK ACCOUNT MUNICH 35045-806 C B LZ 700 1 OO 80) DEUTSCHE BANK MUNICH. PROMENADEPLATZ. KO NTO - N R. 13/20 5 94 (B LZ 7OO 7 O O 1 O) TEL-EeRAMME / CABLES LAWCLAIMS MUENCHEN 2ÜQ363S Henon - 2 - 2675-76 compared to the sleeve-like element (5) in its longitudinal direction (25) by the joint inclination of the fork (3) and the sleeve-like element Element (5) is movable between a transport position, in which this center of gravity is closer to the forklift (1) than the support area (12) and a Kip.ps te llung in which this The center of gravity in relation to the forklift (1) is located on the other side of the support area (12) and in which this axis (26) is located in is in the immediate vicinity of this support area (12). 2. Apparatus according to claim 1, characterized in that the sleeve-like element (5) carries at least one about a horizontal transverse axis (27) rotatable roller (12) which is located in the immediate vicinity of its front edge (11) which is farthest from the forklift ζΐ-) is removed to form this support area, and at least one longitudinal runway (14) which is inclined in the direction of this front edge (11) from bottom to top when the device is in the transport position and in the opposite direction Direction inclined, when the device is in the tilted position, that the load receptacle (6) has a runway (7) which extends essentially parallel to the runway (14) of the sleeve-like element (5) and in the transport position in contact with the upper one Area of the roller (12) mounted on the sleeve-like element (5) and that at least one roller (18) rotatable about a horizontal transverse axis (26) is at least in the Tran sport position between the line of gravity through the ^c xis (C) of the load receiving means (6) and the load may be located on it and the A forklift (1) facing the lateral end of this load suspension - 3 909835/0559 Henon - 3 - 2675-76 would take (6), this role (18) at least with the the upper region (15) of the runway (14) on the sleeve-like element (5) is in contact, and the load pick-up (6) through the sleeve-like element (5) in the transport position is carried over these rollers (12, 18) and the roller tracks (7, 14) to to roll in the longitudinal direction to the tilt position and to tilt when the center of gravity passes through the center of gravity (C) beyond the contact zone between the runway (7) of the Load pick-up (6) and the roller (12) arranged on the sleeve-like element (5) and if the axis (26) is the on the load pick-up (6) located roller (18) is located in the immediate vicinity below this contact zone. 3. Apparatus according to claim 2, characterized in that the runway (14) on the sleeve-like element (5) has a stop (17) in the immediate vicinity of its end (11) furthest away from the forklift (1) in such a position that the Axis (26) of the roller (18) on the load pick-up (6) when it is in contact with this stop (17), lies essentially in the plane which is in contact with the runway (7) of the load receiver (6) Surface line (28) of the roller (12) mounted on the sleeve-like element (5) and the axis of rotation (27) of this roller (12) on the sleeve-like element (5) is defined. 4. Device according to one of claims 2 or 3, characterized in that the sleeve-like element (5) formed roller track (14) essentially parallel to the fork (3) of the forklift which is received by the sleeve-like element (5) (1) runs. 909835/0559 *) Q ft "> a QS Henon - 4 - 2675-76 5. Device according to one of claims 2 to 4, characterized in that the runway (14) on the sleeve-like Element (5) has two parallel rails (15, 16) which run in the longitudinal direction and are spaced apart from one another have, which corresponds approximately to the diameter of the roller (18) located on the load pick-up (6), these being Guides are located below or above this role. 6. Device according to one of claims 2 to 5, characterized in that the sleeve-like element (5) has two its two sides arranged, running in the longitudinal direction roller tracks (14) and that the sleeve-like Element (5) arranged roller (12) is located between these two roller tracks. 7. Device according to one of the claims, characterized in that it has means (22, 23) for locking the load bearing (6) has opposite the sleeve-like element (5) in the transport position. 8. Device according to one of the preceding claims, characterized in that the load receptacle (6) as a basket, trough or shovel or has a shape adapted to the respective purpose. 9. Device according to one of claims 1 to 8, characterized in that the load receptacle (6) has a platform which has a locking system that allows containers to be attached to the platform and to be tilted. 909835/0559