WO2010012013A1

WO2010012013A1 - Truck-mounted forklift having lateral thrust release mechanism

Info

Publication number: WO2010012013A1
Application number: PCT/AT2009/000281
Authority: WO
Inventors: Johann Katsch
Original assignee: Palfinger Ag
Priority date: 2008-07-30
Filing date: 2009-07-17
Publication date: 2010-02-04
Also published as: EP2303756B1; ATE547375T1; AT10851U1; EP2303756A1

Abstract

The invention relates to a truck-mounted forklift (1), comprising a chassis (2) and a load lifting device (3) having a load application means (4), wherein during the loading and unloading of a load (5) the truck-mounted forklift (1) can be supported on a support surface (6) of a platform (7a), a truck bed (7b) or the like, and the truck-mounted forklift (1) has a lateral thrust release mechanism (8) for ensuring the lateral movement (Y) of the load application means (4) while maintaining the supporting action, wherein the lateral thrust release mechanism (8) comprises at least one contact part (9) that can be brought in contact with the support surface (6) and a support part (10) supporting said contact part (9), wherein the at least one contact part (9) and the support part (10) are disposed such that they can be moved to a limited or unlimited extent relative to each other in the lateral direction.

Description

Transportable forklift with side thrust release device

The invention relates to a transportable forklift with a chassis and a load lifting device with a load application means, wherein the transportable forklift when loading and unloading a load on a support surface of a platform, a truck bed or the like can be supported and the transportable forklift

Side thrust relief device to ensure the lateral movement of the

Lastangriffsmittels while maintaining the supporting effect, wherein the side thrust releasing device at least one can be applied to the support surface

Abutment part and a bearing part abutment this bearing part has.

With transportable forklifts, which are carried for example at a rear of a truck, there is generally a contradiction between the simplest possible design of the transportable forklift truck easier to take the truck on the rear and on the other hand the highest possible weight of a truck to maintain stability or balance Movement of heavy loads. The lighter the transportable forklift, the easier it is to attach to a truck tail. Also, the actual load on the truck can be increased. The lighter, however, such a transportable forklift, the less a load can be moved away from the center of gravity of the transportable forklift, since at high loads, the risk of tipping over of the transportable forklift increases.

To reduce this risk, a known solution is to support the transportable forklift when loading and unloading a load. Here, the transportable forklifts on

Soil, on a support body such as. On a platform to be loaded or

Ramp or lean on a truck to be loaded. When unloading at one

Platform or ramp, the load can be raised accordingly, then moves the entire transportable forklift or the load lifting device until it stops, so that, for example, the mast of the lifting device on a vertical

Supporting surface of the ramp or cargo area is applied. Then, for example, the load with a push fork or a scissor feed from the mast and thus from the

Focus to be moved away, with the risk of tipping over

Mitnahmestaplers is avoided by the supporting action between mast or lifting device and ramp. The load lifting device is generally the part that at least consists of mast and load application means (fork) and at least allows a relative movement of the load with respect to the chassis.

Now, when the mast or the load lifting device is applied to the ramp, only a forward, backward, up and down movement can be performed with the load application means. When used on loading ramps, it may well be necessary to perform a lateral displacement of the load. Because the

Lifting device but rests supportingly on the support surface of the ramp, a lateral displacement of the lifting device is not possible or can cause severe damage to the lifting device and to the platform.

To avoid this problem, various solutions have already been considered or implemented. In general, a Seitenschubfreistellung is necessary to ensure that the supporting effect of the abutment surface is maintained on the support surface in preferably lateral method of the load application means and / or the lifting device and / or the chassis.

A first possibility for this is to attach to the contact surface of the lifting device or the mast a film to facilitate the sliding, which allows a lateral movement while maintaining the supporting action. For heavy loads, however, the resulting contact pressure is so high that the sliding effect for a lateral movement is no longer sufficient.

In EP 1 457 456 B1, the side-slip release problem is solved such that a separate load support beam is attached to the chassis, wherein the load support beam has a contact surface for engaging a substantially vertical, outer, the

Platform facing surface. Thus, in this embodiment, the

Supporting action of the lifting device or the mast decoupled, whereby the load lifting device can move laterally freely along a push frame or mast carrier.

In EP 1 792 869 A2 a decoupled from the mast load support is also indicated, which is mounted on the mast support or push frame and in a similar

The way in which the previously mentioned document achieves the supporting effect and at the same time the side thrust release. The disadvantage of these two versions is the additional effort in the manufacture and installation of load support beams, the provision of additional hydraulics for the movement of the load support beams and an unfavorable force curve.

The invention is therefore based on the object to avoid the disadvantages described above, to provide a comparison with the prior art improved transportable forklift and to provide a simple and versatile way to Seitenschubfreistellung.

This object is achieved in that the transportable forklift has a side thrust separating device having at least one abutment against the support surface abutment part and this Anliegeteil bearing bearing part, wherein the at least one abutment and the bearing part are arranged in the lateral direction relative to each other limited or infinitely movable. By this embodiment, it is possible to decouple the adjacent part of the driving stacker by the relative movement to the bearing part of the lateral movement of at least a portion of the transportable forklift.

A preferred embodiment provides that the side thrust release device is arranged on the load lifting device.

Preferably, it is further provided that the side thrust releasing device is arranged on a mast of the lifting device. The side thrust release device is arranged in the contact area of the mast and platform. However, it can also be attached, for example, to the push frame or mast support, to the chassis or to load support beams, as are known from EP 1 457 456 B1 and EP 1 792 869 A2.

According to one embodiment, it is provided that the side thrust releasing device is arranged or fastened via the bearing part on the transportable forklift. The bearing part can be arranged on the chassis, on the push frame and / or on the load lifting device - preferably on the mast - of the transportable forklift. The bearing part can also be arranged on the load support carriers known from the cited documents. In order to enable the lateral movement of the load lifting device, it is provided that the load lifting device is mounted laterally movable on the chassis via a pusher. The part of the chassis to which the load lifting device is arranged to be laterally displaceable may be, for example, a forward push frame or else a mast carrier. The shift can be done by a side thrust cylinder.

In general, there are two alternative ways of executing the abutment surfaces. On the one hand, the abutment surface of the abutment against the support surface on the platform may be locally detectable, on the other hand, the abutment surface relative to the support surface during the lateral movement be movable.

The first variant provides that in the supporting state, the abutment part has a contact surface which can be determined locally with respect to the support surface, wherein the abutment part makes contact with the support surface via its abutment surface. This can be done, for example, that the bearing part is designed as an articulated arm, which supports the abutment part laterally movable at least in relation to the load application. Thus, the abutting part does not move relative to the platform during the side thrust release because the articulating arm compensates for this lateral movement for the abutment part. A possible embodiment further provides that the bearing part is designed as a parallelogram lever mechanism or as a pointer lever. Furthermore, it is possible that the bearing part is designed as a slide / guide, which leads the abutment part at least laterally movable with respect to the load application means. Thus, in turn, the abutment does not move with the lateral displacement of the load, since the slide or sliding guide suppressed or compensates for this movement. In this variant, it is generally preferred that the abutment surface has a non-slip surface (for example made of rubber) which prevents a lateral movement of the abutment part with the bearing part. The bearing part can also be designed such that the joints allow a vertical movement, whereby the abutment part is adaptable to the height of the platform.

The second variant provides that in abstützenden state, the abutment part a in

Reference to the support surface movable abutment surface, wherein the abutment part contacted via the abutment surface supporting the support surface. This can be achieved by the contact part having at least one abutment surface Rolling body such as a cylindrical roller, a cone, a roller, a ball, an endless chain or the like. In order to permit a vertical movement here as well, it can be provided that the rolling elements - or preferably three rolling bodies arranged one above the other - are preferably vertically displaceable by force accumulators (such as mechanical or pneumatic suspension) on the bearing part. This is especially important if the mast is tilted slightly backwards by the tilting cylinder in order to obtain a stability compensation for very large loads. In this tilting movement of the rolling element moves - when it is attached to the load lifting device - with, whereby the contact surface of the rolling element would move vertically relative to the support surface on the platform. By mounted on the bearing part or on the bolt springs, the displacement movement relative to the support surface, which can cause damage, be compensated.

According to a particularly preferred embodiment and also as known from the prior art, it is generally provided that the abutment surface of the abutment part and the support surface of the platform are aligned substantially vertically and transversely to the forward direction of the transportable forklift. Nevertheless, it should be noted that according to the invention, the support surface and contact surface are also arranged horizontally or in an inclined position. This can be the case, for example, if the transportable forklift is supported or only on the horizontal loading surface of the platform. Also in this horizontal orientation of the support surface abutment and bearing parts according to the invention can be used for Seitenschubfreistellung (see Fig. 15).

Preferably, it is further provided that the contact part is adaptable to the height of the support surface, wherein at least the abutment part of the side thrust releasing device is vertically adjustable with respect to the chassis.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show:

1 is a view of the lifting device and the platform, Fig. 2 shows a cross section of the transportable forklift with scissors feed, 3 shows a cross section of the transportable forklift with fork feed,

Fig. 4 is a view of the transportable forklift with scissors feed and

Side thrust relief device, Fig. 5 the detail section A of Fig. 4, Fig. 6 a transportable forklift from above,

7 is a plan view of the side thrust releasing device with rolling elements,

8 is a plan view of the side thrust releaser with endless chain,

9 is a plan view of the side thrust release device with sliding guide,

10 shows the sideshift release device from FIG. 10 after the displacement, FIG. 11 shows a side thrust release device from above with parallelogram

Lever, Fig. 12, the side thrust relief device of FIG. 11 with shifted

Parallelogram lever system,

13 shows a front view of the load lifting device with pointer lever, FIG. 14 shows the load lifting device from FIG. 13 with displaced pointer lever, FIG. 15 shows a side thrust releasing device with a horizontal contact surface, and FIG. 16 shows a view with three rolling elements arranged vertically one above the other.

The reference numeral 7 generally designates a support body, which may be designed, for example, as a platform 7a or truck bed 7b.

The sideshift relief device 8 comprises at least one abutment part 9 and a bearing part 10, wherein the abutment part 9, for example, as rolling elements 18, endless chain 30, abutment plate 33 or the like may be performed and the bearing part 10 in turn as an articulated arm 14, parallelogram lever mechanism 15, pointer lever 16, Sliding guide 17, abutment part holder 26, bolt 32 and the like can be performed.

In Fig. 1, the load lifting device 3 when lifting a load 5 on the load application means 4 is shown. The greater the weight of the load 5, the higher the

Supporting effect that must be achieved. The support takes place via the

Rolling elements 18, with their contact surface 13, the transportable forklift 1 on the

Supporting support surface 6 of the platform 7a. The rolling elements 18 are on the bearing part

10 movably mounted, which in turn communicates with the mast 11. The side thrust release device 8 is always at least from bearing part 10 and adjacent part 9, wherein in Fig. 1, the rolling elements 18 form the abutment part 9. By means of the pushing device 12, the entire load lifting device 3 can be moved laterally along the support surface 6 of the platform 7a. The lifting device 3 can be between the chassis 2, to which the wheels 23 are mounted, moved back and forth or moved laterally.

FIG. 2 shows the entire transportable forklift 1, which consists of the chassis 2 together with the driver's cab 22 and the load lifting device 3. The chassis 2 in this case additionally has a support 21 which supports the transportable forklift 1 with respect to the ground. The attached on the mast 11 of the lifting device 3 side thrust block 8 is located with its abutment surface 13 on the platform 7a. In this Fig. 2, the vertical portion of the platform 7a extends to the bottom, whereby the load lifting device 3 is pushed for a higher range relative to the chassis 2 to the very front.

3 shows in contrast to a truck bed 7b in which the chassis 2 of the transportable forklift 1 with the front area can partially drive under the truck bed 7b. In this case, the load lifting device 3 does not have to be moved forward relative to the chassis 2, as a result of which a more stable center of gravity remains. The load application means 4 is in this case designed as a push fork 24. Other than illustrated, the load application means 4 may also have a scissor lift. These mentioned variants are particularly useful when the mast is designed as a static mast, which itself can not perform any forward movement or movement in the direction of travel.

4 shows a view of the transportable forklift 1, in which the push frame 25 can be seen, along which the load lifting device 3 can be moved laterally with respect to the chassis 2 with the pushing device 12. The supports 21 are hereby collapsed and the side thrust release 8 has rolling elements 18 as abutting parts 9.

In Fig. 5, the side thrust relief device 8 is shown in more detail in detail section A. The bearing part 10 here consists of the abutment part holder 26 and the

Bolt 32 to which the rolling elements 18 are rotatably mounted. The abutment part holder 26 is attached to the mast 11. To a movement of To allow rolling elements 18 in the vertical direction Z, the rolling elements 18 can move between the abutment part holders 26 along the bolt 32, wherein the springs 19 damp this vertical movement.

Fig. 6 shows the transportable forklift 1 from above, wherein the push frame 25 can be seen, which is movable by means of the forward thrust cylinder 27 along the chassis 2. On the push frame 25 itself, the side thrust cylinder 29 of the pusher 12 is shown, which allows the lateral movement of the lifting device 3. On the push frame 25 and the tilt cylinder 28 is mounted, which can tilt the mast 11 from the vertical orientation to the rear direction of the driver's cab 22 and forward towards the support body 7.

Fig. 7 shows how the Seitenschubfreistellung 8, the movement can take place in the lateral direction Y. Here, the lifting device 3 is supported by the rolling elements 18 with the abutment surface 13 on the support surface 6 of the platform 7b. The rolling elements 18 are connected by the bolt 32 and the Anliegeteilhalterung 26 with the mast 11 and can rotate along the support surface 6 while maintaining the supporting action.

Fig. 8 shows a similar embodiment as Fig. 7, wherein the abutment part 9 is formed by an endless chain 30 which is rotatably guided on rollers 31. The region of the endless chain 30 facing the support surface 6 forms the abutment surface 13. The endless chain 30 may also be in the form of an endless belt or endless belt.

Fig. 9 shows the abutment part 9, which is slidably guided along a sliding guide 17, which is arranged in the abutment part holder 26. The sliding guide 17 can also be designed as a slide rail, which corresponds to a corresponding guide on the contact part 9.

FIG. 10 shows the sideshift relief device 8 from FIG. 9, wherein the abutment parts 9 are moved to the left along the sliding guide 17, whereby a rightward movement of the load application means 4 and thus of the load 5 takes place. 11 shows a further embodiment variant of a side thrust-freeing device 8, wherein the bearing part 10 is formed by a parallelogram lever mechanism 15 which has articulated arms 14 and is articulated to the abutment part holder 26. Here, the abutment part 9 is designed as a support plate 33. In the case of lateral movement Y of the load application means 4, the abutment surface 13 of the abutment plate 33 is also not moved relative to the support surface 6, as can be seen from FIG. 12 from the right-shifted parallelogram lever mechanism 15.

FIG. 13 shows an alternative embodiment of a transportable forklift 1 or a load lifting device 3 with a side thrust separating device 8. In this case, the bearing part 10 is formed by the abutment part holder 26 and pointer lever 16 mounted thereon, wherein the abutment part 9 can be moved and pivoted relative to the bearing part 10 is arranged. In Fig. 14a it can be seen how the front view of the lifting device 3 is after the side shift. Here, too, the contact part 9 can be moved not only laterally but also vertically in order to adapt to the height of the abutment surface 6 of the platform 7. An adjustment in the forward or backward direction X is possible. FIG. 14b shows a design of the abutment part 9 which is not movable relative to the pointer lever 16.

Fig. 15 shows an embodiment of a side thrust releasing device 8, the abutment parts 9 held by bearing parts 10, wherein the abutment parts 9 are supported with their abutment surfaces 13 on vertically or horizontally oriented support surfaces 6 of a truck bed 7b or platform 7a. The abutment parts 9 are designed in this figure as rolling elements 18, which are held by the abutment part holders 26 and the bolt 32 on the mast 11, wherein the rolling elements 18 allow lateral movement. If, as shown in this figure, both horizontally and vertically aligned abutting parts 9 are attached to the transportable forklift 1, even greater stability during loading and unloading of a load 5 can be achieved. In order to ensure the vertical movement of the fork along the mast 11, the horizontal side thrust release device 8 can be made removable or wegschwenkbar.

FIG. 16 shows a detail of a transportable forklift 1, wherein four horizontal abutment part holders 26 are guided on the mast 11 with bolts 32 therebetween Rolling elements 18 are arranged. As a result, a better adaptation to the height of the platform 7a or the truck bed 7b is possible. In addition, an exchange of a single worn rolling element 18 is possible without having to replace an entire long rolling element 18 (see, for example, FIG. 5).

In the present invention, a transportable forklift is specified, which does not tip over when moving large loads and thus allows greater ranges. This is achieved by the special design of the side thrust relief device - which allows lateral movement between abutment part and bearing part. In the embodiment of the abutment parts as rolling elements, the lateral movement of at least a portion of the transportable forklift during support along the support surface is unlimited.

Claims

claims

1. transportable forklift with a chassis and a load lifting device with a load application means, wherein the transportable forklift when loading and unloading a load on a support surface of a platform, a truck bed or the like can be supported and the transportable forklift a Seitenschubfreistelleinrichtung to ensure the lateral movement of Lastangriffsmittels Maintaining the supporting effect, wherein the side thrust separating device has at least one abutment against the support surface abutment part and this Anliegeteil bearing bearing part, characterized in that the at least one abutment part (9) and the bearing part (10) are arranged in the lateral direction relative to each other limited or infinitely movable ,

2. transportable forklift according to claim 1, characterized in that the side thrust-freeing device (8) on the load lifting device (3) is arranged.

3. takeaway truck according to claim 2, characterized in that the

Side thrust separating device (8) on a mast (11) of the load lifting device (3) is arranged.

4. transportable forklift truck according to one of claims 1 to 3, characterized in that the side thrust releasing device (8) via the

Bearing part (10) on the transportable forklift (1) is arranged.

5. Mitnahmestapler according to claim 4, characterized in that the bearing part (10) on the chassis (2) on the push frame (25) and / or on the load lifting device (3) - preferably on the mast (11) -

Mitnahmestaplers (1) is arranged.

6. transportable forklift truck according to one of claims 1 to 5, characterized in that the lifting device (3) via a thrust device (12) laterally (Y) movable on the chassis (2) is mounted.

7. Mitnahmestapler according to one of claims 1 to 6, characterized in that in the supporting state, the abutment part (9) with respect to the support surface (6) locally detectable abutment surface (13), wherein the abutment part (9) on its abutment surface (9). 13) the

Contacting support surface (9) supporting.

8. Mitnahmestapler according to claim 7, characterized in that the bearing part (10) is designed as an articulated arm (14) which supports the abutment part (8) at least with respect to the load application means (4) laterally (Y) movable.

9. Mitnahmestapler according to claim 7, characterized in that the bearing part (10) as a parallelogram lever mechanism (15), as a pointer lever (16) or as a slide rail / -führung (17) is executed, wherein these the abutment part (9) at least in Reference to the load application means (4) laterally (Y) movable lead.

10. Mitnahmestapler according to one of claims 1 to 6, characterized in that in the supporting state, the abutment part (9) in an

Reference to the support surface (6) movable abutment surface (13), wherein the abutment part (9) via the abutment surface (13) the supporting surface (6) contacted supporting.

11. Mitnahmestapler according to claim 10, characterized in that the

Adjacent part (9) at least one a bearing surface (13) having Wälzkörper (18) such as a cylindrical roller, a cone, a roller, a ball, an endless chain or the like.

12. Mitnahmestapler according to claim 11, characterized in that the

Rolling elements (18) by force storage, such as springs (19), limited on the bearing part (10) preferably vertically (Z) is displaceable.

13. Mitnahmestapler according to one of claims 1 to 12, characterized in that the abutment surface (13) of the abutment part (9) and the Support surface (6) of the platform (7a) are aligned substantially vertically (Z) and transversely to the forward direction (X) of the transportable forklift (1).

14. Transportable forklift according to one of claims 1 to 13, characterized in that the abutment part (9) to the height of the support surface (6) is adjustable.

15. Mitnahmestapler according to one of claims 1 to 14, characterized in that at least the abutment part (9) of the

Side thrust relief device (8) with respect to the chassis (2) vertically (Z) is adjustable.