EP2614028B1 - Device for mounting a load-bearing fork profile - Google Patents

Description

The invention relates to a device for receiving a fork carrier profile according to the preamble of claim 1.

By the DE 36 32 031 A1 is a Vorbaugerät with two forks for forklift known in which two counteracting hydraulic cylinder for the transverse displacement of the fork carriage plate are arranged on a fork carrier plate. This fork carrier plate in turn carries two antiparallel-acting hydraulic units, with which the forks are displaceable together and at a fixed distance from each other on the fork carrier plate. This makes it possible to move the respective outermost of the forks to the respective end of the fork carriage plate whose length corresponds to the width of the forklift. The device requires so-called telescopic cylinders because of the stroke lengths, which are not only expensive, but also produce very strong thrust forces that must be limited by pressure relief valves. Nevertheless, however, the forks are not to bring in a contact position to each other.

The DE 36 39 933 shows a Vorbaugerät for attachment to a lifting vehicle with four forks, of which the two outer can be moved up to the interior. The DE 36 39 933 A1 discloses a further development of DE 36 32 031 A1 in which a total of four forks are arranged on a two-piece fork carriage plate, all of which are displaceable relative to each other, so that it is possible to accommodate either a normal Euro pallet, a small pallet or two small pallets side by side. Also this device requires because of the stroke lengths so-called telescopic cylinders, which are not only expensive, but also produce very strong shear forces that must be limited by pressure relief valves. But even here, the forks are not to bring in a contact position to each other.

The DE 44 33 050 A1 shows a Vorbaugerät for attachment to a lifting vehicle, in which two right and left fork carriage are moved with a hydraulic cylinder.

By the DE 20 2010 002 928 U1 An attachment for industrial trucks is known in which two horizontal slideways and hydraulic cylinders are attached to a frame, the horizontal piston rods act at the top and bottom of the vertical legs of forks, which are positively connected to the sliding guides. The horizontal displacement of each fork corresponds to the maximum piston stroke. The minimum distance between the forks corresponds to the length of the hydraulic cylinder less the lengths of the two overlaps of piston rods and width of the forks. A close merging of the forks to a mutual contact is not possible.

The disadvantage is that the forks can only reach a limited width, which is regularly determined by the width of the attachment.

The object of the present invention is to provide a device which enables safe operation with high lateral efficiency in a simple manner.

• zumindest einen im wesentlichen waagerecht angeordneten Träger, insbesondere einen T-Träger,
• zumindest ein Führungsprofil, insbesondere ein C-förmiges Führungsprofil, das in einer Längsrichtung verschieblich auf dem Träger, insbesondere dem T-Träger, angeordnet ist,
• zumindest eine Achse, die an dem Führungsprofil im Bereich eines äußeren Endes im wesentlichen parallel zur Längsrichtung befestigt ist und auf der das Gabelträgerprofil in Längsrichtung verschieblich angeordnet ist,
• zumindest eine Begrenzungseinrichtung, die die Längsbewegung des Gabelträgerprofils auf der Achse einschränkt,
• zumindest ein korrespondierender Verschiebezylinder, der an dem Gabelträgerprofil angreift und dieses in Längsrichtung verschieben kann und auf dem Träger zumindest mittelbar abgestützt ist.

The object is achieved by a device for receiving a fork carrier profile, which is to be mounted in a stem on a Zinkenverstellgerät, in particular a lifting vehicle,
full:

• at least one substantially horizontally arranged carrier, in particular a T-carrier,
• at least one guide profile, in particular a C-shaped guide profile, which is arranged displaceably in a longitudinal direction on the carrier, in particular the T-carrier,
• at least one axis which is fastened to the guide profile in the region of an outer end substantially parallel to the longitudinal direction and on which the fork carrier profile is arranged to be displaceable in the longitudinal direction,
• at least one limiting device which restricts the longitudinal movement of the fork carriage profile on the axle,
• at least one corresponding displacement cylinder which acts on the fork carrier profile and this can move in the longitudinal direction and is supported at least indirectly on the carrier.

By the device according to the invention, a desired opening area can be achieved purely hydraulically without fork adjustment by hand. From the seat, for example, the driver can achieve an opening range with AK forks of 285 - 1,045 mm with, for example, 135 mm wide forks. With the aid of the upstream axles, an additional stroke of, for example, 100 mm is achieved per side.

The device according to the invention is suitable for receiving a fork carrier profile which is to be mounted in a stem on a fork positioning device, in particular a lifting vehicle. The device comprises at least one substantially horizontally arranged carrier, in particular with a T-shaped cross-section. This ensures a flexible installation and at the same time a good stability. A guide profile, in particular with a C-shaped cross section, can be securely attached to the carrier, which is arranged so as to be displaceable on the carrier in the longitudinal direction. An axle can then be fastened to the guide profile in the region of an outer end on which the fork carrier profile is displaceably arranged in the longitudinal direction, at least one limiting device which restricts the longitudinal movement of the fork carrier profile on the axle.

The movement of the fork carriage profile can be ensured simply and safely by means of at least one corresponding displacement cylinder, which engages the fork carriage profile and can displace it in the longitudinal direction and is supported on the T-mount at least indirectly.

It is advantageous if the stem for lifting vehicles has at least one vertically movable main carrier, the dimensions of which correspond to the width of the lifting vehicle and to which an intermediate frame with sliding cylinders for the independent horizontal guidance of two fork carrier profiles is arranged, wherein the displacement cylinders are designed for the fork carrier profiles in that the fork carrier profiles can be brought into a mutual contact position as well as into a maximum spread position, wherein an outer edge of at least one fork carrier profile can be brought close to a virtual side surface which encloses the lifting vehicle in the direction of travel between them.

Thus, the advantage is achieved that the application area for different cargo and its documents such. different pallets at the lowest possible cost is significantly expanded. The transported goods can thereby be as close as possible to side walls and other goods to be transported, e.g. Containers are brought and / or the forks can be inserted into pallets of different widths and number such. in Euro pallets and two or more narrow pallets.

It is particularly advantageous in the course of further embodiments of the invention, if - the device in the sense of an intermediate frame in its head area has two oppositely operable horizontal hydraulic drives whose thrust paths, based on the center position of the device in the sense of an intermediate frame to each side to the maximum end position each fork are designed, and / or the hydraulic drives are connected by a support profile such that they act in opposite directions, and / or the forks have vertical and horizontal legs and that in the vertical legs cutouts are arranged in the Contact position of the forks to complement a viewing window for the operator, and / or the device in the sense of an intermediate frame on its front recesses for a manual Umhängen the forks, and / or the axes of the hydraulic drives in a common horizontal Level lie, and / or the intermediate frame has four vertical struts on which projections for attachment of the hydraulic drives for the displacement of the forks are arranged, and / or the axes the hydraulic drives for the forks lie in a common vertical plane within the intermediate frame, and / or when two guide bodies are arranged with T-shaped heads on the intermediate frame both above and below, surrounded by complementary sliding bodies on the vertical legs of the forks are.

It is advantageous if an abutment is provided at the outer end and / or at an inner end of the axle. The movement of the cylinder can thus serve both for a wide, easily specifiable lateral extension as well as a return.

It is advantageous if two, in particular four mirror-image arranged carrier, in particular T-beam, are provided with oppositely operable sliding cylinders. As a result, in particular a stable hold of the device is given.

It is advantageous if the fork carrier profile is mounted in an axle.

It is advantageous if the fork carrier profile has a substantially central passage through which an axis is guided. As a result, in particular, the focus of the stem is moved to the rear and a narrower construction allows.

It is advantageous if two parallel axes are provided on which the fork carrier profile is guided.

It is advantageous if the fork carrier profile has two central passages through which the axes are guided.

It is advantageous if the lateral Gesamtausfahrweg is greater than the length of the carrier.

It is advantageous if the fork carrier profile has a fork prong, in particular in one piece with the fork prong, wherein a vertical leg of the fork prong having central passages. This can be a significant savings in thickness and weight in this area.

It is advantageous if the device has two oppositely operable horizontal hydraulic drives in a head region whose thrust paths, based on a center position of the device are designed to each side to the maximum end position of each fork carrier profile, in particular the hydraulic drives are connected by a support profile in that they act in opposite directions and / or in particular the axes of the hydraulic drives lie in a common horizontal plane and / or in particular the device has recesses for a manual transfer of the fork carrier profiles, in particular on a front side and / or in particular has four vertical struts which projections for fixing the displacement cylinder for the displacement of the fork carrier profiles are arranged.

It is advantageous if the fork carrier profiles have vertical and horizontal legs and that in the vertical legs cutouts are arranged, which complement each other in the contact position of the fork carriage profile to a viewing window for the operator.

It is advantageous if the axes of the displacement cylinders for the fork carriage profiles lie in a common vertical plane within the device.

Further features and advantages of the invention will become apparent from the claims and the following description in which embodiments of the subject invention in conjunction with the drawings are explained in more detail.

Fig. 1

eine erfindungsgemäße Vorrichtung,

Fig. 2

eine erfindungsgemäße Vorrichtung in Explosionsdarstellung,

Fig. 3a-3d

eine erfindungsgemäße Vorrichtung in Verschiebepositionen,

Figur 4

eine perspektivische Ansicht eines Teils eines Hubfahrzeugs mit zusammengefahrenen Gabelzinken auf der rechten Seite,

Figur 5

eine perspektivische Ansicht analog Figur 4 mit zusammengefahrenen Gabelzinken auf der linken Seite,

Figur 6

eine perspektivische Ansicht des Zwischengestells mit seinen Antrieben,

Figur 7

eine rückseitige Ansicht der rechten, unteren Ecke von Figur 6,

Figur 8

eine Seitenansicht des Zwischengestells nach Figur 6,

Figur 9

einen Ausschnitt aus dem oberen Teil von Figur 8 in vergrößertem Maßstab,

Figur 10

eine Frontalansicht des Gegenstandes nach Figur 6, jedoch mit am weitesten auseinander geschobenen Streben,

Figur 11

eine perspektivische Ansicht des Gegenstandes nach Figur 10, jedoch mit vorgehängten Gabelzinken,

Figur 12

eine Frontalansicht des Vorbaugeräts in einer Stellung rechts der Symmetrieebene des Hubfahrzeugs, und

Figur 13

eine Frontalansicht des Vorbaugeräts in einer Mittelstellung vor der Symmetrieebene des Hubfahrzeugs.

Show it:

Fig. 1

a device according to the invention,

Fig. 2

an apparatus according to the invention in exploded view,

Fig. 3a-3d

a device according to the invention in displacement positions,

FIG. 4

a perspective view of a portion of a lift truck with collapsed forks on the right side,

FIG. 5

a perspective view analog FIG. 4 with forked forks on the left side,

FIG. 6

a perspective view of the intermediate frame with its drives,

FIG. 7

a back view of the right, bottom corner of FIG. 6 .

FIG. 8

a side view of the intermediate frame after FIG. 6 .

FIG. 9

a section of the upper part of FIG. 8 on an enlarged scale,

FIG. 10

a frontal view of the object FIG. 6 but with strands furthest apart,

FIG. 11

a perspective view of the object according to FIG. 10 , but with front forks,

FIG. 12

a frontal view of the head unit in a position to the right of the plane of symmetry of the lifting vehicle, and

FIG. 13

a frontal view of the Vorbaugeräts in a central position in front of the plane of symmetry of the lifting vehicle.

Fig. 1 shows a device 1 according to the invention with two fork carrier profiles 2, which are held displaceably via two axes 6 at an outer end 7.

The axes 6 are each attached to a guide profile 4 with a C-shaped cross section. In each case a guide profile 4 runs on a support 3 with a T-shaped cross-section. Fixedly coupled in parallel with the T-beam 3 and via a holder 13, in each case a hydraulic displacement cylinder 9 is articulated on a fork carrier profile 2.

Thus, each of the two displacement cylinder 9 is advantageously connected to an advantageously narrow fork carrier profile 2, the top and bottom holes or bushings 10, through which two axles 6 are inserted, which have in the region of their ends 7, 15 abutment 8, with the C-shaped guide profiles 4 are connected.

The associated with an extension and retraction of the cylinder 9 movement of the carriage carrier profile 2 is in the Fig. 3a-3d shown.

When extending the cylinder 9, first the fork carrier profiles 2 move from the zero position Fig. 3a starting on the axes 6 until they abut the abutment 8 at the outer end 7. As a result, the force is directed to the C-shaped guide profiles 4, which then move on the T-beam 3 with the remaining stroke of the cylinder 9.

Thus, the entire displacement is greater than the frame width and length of the C-shaped guide profiles.

When moving together the cylinder 9, shown in Fig. 3c to 3d An entspechender movement in the opposite direction, in particular, the fork carrier profile abuts first on an abutment 8 at an inner end 15 of the axis to then push back the C-shaped guide profile 4 in the sense of a Doppeleleskopprinzips.

Fig. 2 shows an inventive device 1 in an exploded view. The device has a fork carrier profile 2, with the objects to be transported, For example, pallets can be easily attacked. Through the central passages 10 in the vertical leg region of the fork carrier profiles 2, a high weight saving and a return of the center of gravity can be done.

In the FIGS. 4 and 5 the front and lower part of a lifting vehicle 1 'is shown, which has a lifting device 2' in front of the driver's seat, to which a main support 3 'for the transverse displacement of a device 1 for the support of two L-shaped fork carrier profiles 2 has. One can imagine on both sides of the lifting vehicle 1 'depending on a virtual vertical plane whose distance corresponds to the width of the lifting vehicle. It can also be seen that at least the upper part of the main carrier 3 'corresponds to this width. The two fork carrier profiles 2 are shown in their contact position, and the respective outermost edge 7 ', 8' at least largely reaches the respective virtual plane. This allows a recorded load until each move to a wall or other object to which the lifting vehicle 1 'can be approached as close as possible, the experience along the axis 6, shown as an example in Fig. 1 , can be done.

In FIG. 6 It is shown that the device 1 has in its head region two horizontally operable horizontal hydraulic drives 9 'and 10', whose axes lie in a common horizontal plane. The piston rod 9a 'of the drive 9' is shown in its maximum Ausschubstellung, the piston rod of the drive 10 'in its retracted position to facilitate the overview. As the FIG. 6 Further, the device 1 has four vertical struts 11 ', 12' and 13 ', one of which is covered by the strut 12'. At this struts projections 11 a ', 12 a' and 13 a 'are provided for the attachment of the hydraulic displacement cylinder 9, whose axes lie in a common vertical plane between the struts 11', 12 'and 13'.

On the device 1, four horizontal cross member 16 ', 17', 18 'and 19' are provided, on which the struts 12 'and 13' with the associated fork carrier profiles 2 are slidable by means of sliding bodies, the heads of the cross member 16 ', 17' Embrace '18' and 19 '. Further details are in FIG. 5 shown. At the upper and lower ends of the struts 12 'and 13' are still with support members 21 'and 22' connected, which can be used with recesses 23 'for manual horizontal transfer of the fork carriage profiles, not shown here, if this is additionally desirable.

The FIG. 7 shows a back view of the lower right corner of FIG. 6 with one of the guide housing 24 'with a roller 25', which rolls on the lower main carrier 3 '.

In FIG. 8 on the right one of the lifting devices 2 'is indicated, to which the main carrier 3' with its two horizontal guides 3a 'and 3b' is attached. At these already described device 1 is performed, to which, inter alia, the strut 11 'with its projection 11a' may include for receiving the displacement cylinder 9. Evident are also the four cross members 16 ', 17', 18 'and 19' with the respectively associated sliding bodies. In the upper area are the two hydraulic drives 9 'and 10'.

In FIG. 9 is still shown that the two hydraulic drives 9 'and 10' can be separated by a support section 26 'having two horizontal legs and a vertical connecting member 27'

The FIG. 10 shows a most spread state of the vertical struts 12 'and 13'. The FIG. 11 on the other hand shows a perspective view of the object of FIG. 10 with attached fork carrier profiles 2 (dashed). Here it is also shown that in the vertical legs of the fork carrier profiles 2 cutouts 28 'are arranged, which complement when the fork carriage profiles 2 have moved together to a window for the operator.

The FIGS. 12 and 13 can be seen in synopsis. They are connected by three dot-dash lines, of which the middle line S stands for the virtual plane of symmetry of the lifting vehicle, while the two outer lines LR 'and LL' for the virtual lateral boundary walls of the lifting vehicle 1 '. Again, it can be clearly seen that the cutouts 28 'complement each other to form a viewing window.

At the top of a line guide 29 'for the supply of the upper hydraulic drives 9' and 10 'is indicated.

LIST OF REFERENCE NUMBERS

1

contraption

1'

lifting vehicle

2

Gabelträger Profile

2 '

lifting device

3

carrier

3a '

guide

3b '

guide

3 '

main carrier

4

guide profile

5

longitudinal direction

6

axis

7

outer end

7 '

edge

8th

abutment

8th'

edge

9

displacement cylinder

9a '

piston rod

9 '

hydraulic drive

10

execution

10 '

hydraulic drive

11

extension path

11 '

strut

11a '

head Start

12 '

strut

12a '

head Start

13

bracket

13 '

strut

13a '

head Start

15

inner end

14

forks

16

limiting device

16 '

crossbeam

17 '

crossbeam

18 '

crossbeam

19 '

crossbeam

21 '

supporting member

22 '

supporting member

23 '

recesses

24 '

guide housing

25 '

roller

26 '

support section

27 '

Connecting link protection profile

28 '

cutouts

29 '

wiring

S '

plane of symmetry

LR '

right vehicle limit

LL '

left vehicle limit

Claims (13)

1. Device (1) to take a fork carrier profile (2), to be attached to a front projection on a fork positioner, in particular on a lift truck, comprising:

   at least one essentially horizontally arranged carrier (3), in particular a T-carrier, and at least one guide profile (4), in particular a C-shaped guide profile, which is arranged in a movable fashion in a longitudinal direction (5) on the carrier (3), in particular the T-carrier, and characterised by the fact that there is at least one axle (6), which is fastened to the guide profile (4) at one external end (7) in a way that is essentially parallel to the longitudinal direction (5), and on which the fork carrier profile (2) is arranged in longitudinal direction (5) in a movable fashion, and characterised by the fact that there is at least one limiting device (16), which restricts the longitudinal movement (5) of the fork carrier profile (2) on the axle (6), and also comprising at least one corresponding movement cylinder (9), which engages with the fork carrier profile (2) and can move this in the longitudinal direction (5), and which is supported at least indirectly on the carrier (3).
2. Device in accordance with Claim 1, characterised by the fact that the front projection for lift trucks (1) has at least one vertically movable main carrier (3), whose dimensions correspond to the width of the lift truck (1), and on which the device (1) is arranged with movement cylinders (9) for the separately independent and horizontal guidance of two fork carrier profiles (2), whereby the movement cylinders (9) for the fork carrier profiles (2) are arranged in such a way, that the fork carrier profiles (2) can be brought to a reciprocal contact position as well as a maximum spread position, in which one outer edge of at least one fork carrier profile (2) can be brought close to a virtual side surface, whereby the lift truck (1) is enclosed between them in the travel direction.
3. Device in accordance with Claim 1 or 2, characterised by the fact that at the external end (7) and/or at one internal end (15) a counter bearing (8) is provided for the axle.
4. Device in accordance with Claims 1 to 3, characterised by the fact that two, and in particular four, carriers arranged in mirror-image, in particular T-carriers (3), are provided with movement cylinders (9), which can be operated in opposing directions.
5. Device in accordance with one of the Claims 1 to 4, characterised by the fact that the fork carrier profile (2) is hooked into an axle (6).
6. Device in accordance with one of the Claims 1 to 5, characterised by the fact that the fork carrier profile (2) has an essentially central opening (10), through which the axle (6) is fed.
7. Device in accordance with one of the Claims 1 to 5, characterised by the fact that the fork carrier profile (2) has two central openings (10), through which the axles (6) are fed.
8. Device in accordance with one of the Claims 1 to 7, characterised by the fact that two parallel axles (6) are provided, on which the fork carrier profile (2) is guided.
9. Device in accordance with one of the Claims 1 to 8, characterised by the fact that the overall side extension distance (11) is greater than the length of the carrier (3).
10. Device in accordance with one of the Claims 1 to 9, characterised by the fact that the fork carrier profile (2) has a lift fork (14) and in particular is a single piece with the lift fork, whereby a vertical side section of the lift fork (14) has central openings (10).
11. Device in accordance with Claims 1 to 10, characterised by the fact that in a head area it has two horizontal hydraulic drives (9',10'), which can be operated in opposing directions, and whose travel paths are designed towards each side, in relation to a middle position of the device, and extending as far as the maximum end position of each of the fork carrier profiles (2), whereby in particular the hydraulic drives (9',10') are connected by a carrier profile (26') in such a way, that they work opposing directions, and/or in particular the axles of the hydraulic drives (9',10') lie a common horizontal level, and/or in particular the device has recesses (23) specifically on one of the front faces for manually hanging the fork carrier profiles and/or it has in particular four vertical braces (11',12',13'), on which projecting (11a',12a',13a') are arranged for fastening the movement cylinders (9) for moving fork carrier profiles (2).
12. Device in accordance with Claims 1 to 11, characterised by the fact that the fork carrier profiles (2) have vertical and horizontal side sections, and that cut-outs (28') are arranged in the vertical side sections, whereby these cut-outs form a complementary viewing window for the operator, when the fork carrier profiles (2) are in the contact position.
13. Device in accordance with Claims 1 to 12, characterised by the fact that the axles of the movement cylinders (9) for the fork carrier profiles (2) lie in a common vertical plane within the device (1).

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