DE2319835A1 - LIFTING AND LOADING DEVICE - Google Patents

Description

Dipl.-Ing.

Rudolf Busselmeier '

Dipl.-Ing.

Rolf Charrier Augsburg, April 17, 1973

Patent attorneys Augsburg 31 - P.O. Box 242

Rehlingenstrasse β FMtfdiedtktmto: Some no. MS39

6359 / Ol / üO / gn

Denis Malcolm MILLER 2k Strathfield Road

Andover, Hants, UK

Lifting and loading device

The invention relates to a lifting and loading device which is used in a lift truck provided with a drive is used and especially, if not exclusively, for use in loading and Unloading of transport containers is suitable.

Modern containers such as the I.S.O.-type have a floor space approximately 2.5 m (8 feet) wide and 6, 9, and 12 m (20, 30, and 40 feet) in length. the The loading door is at one end. Certain weights can still be used in these containers with conventional ones Funds are brought. However, these funds have too low a weight limit and bring also very high concentrated loads on the bottom of the container. This creates harm and

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Bends. The present invention relates to a device for loading Containers can be used without applying such concentrated loads.

The present invention aims to provide a lifting and loading device, which can be used with a powered lift truck such as a forklift or side loader. She should have one enable such a pallet truck to load and unload containers, even if the pallet truck is large to drive into the container itself. The invention provides the means by which the load in greatest distance from the door opening inside the container can be brought into position. the Capacity and size is only limited by the size and capacity of the pallet truck or container »

According to the present invention, a lifting and loading device for use with a comprises powered lift trucks have a moving platform carried by wheels or rollers and whose vertical height can be increased or decreased, means for fastening and fixing the movable platform on the lifting device of the lifting truck, with the it is to be used, and a drive device arranged to use its Receives power supply from the pallet truck and the moving platform from the lifting device of the Lift truck extends and to this and to this-

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withdraws on any horizontal line Area that the platform supports.

The horizontally running surface can therefore be the bottom of a container and the movable one Platform can drive the load into the container by extending the drive device.

Preferably the movable loading platform the shape of two or more prongs or forks attached to one end with a transverse structural member are connected. The tines or forks can move under or into a pallet, that carries a burden.

Preferably the prongs or forks are provided with channels or pockets so that the platform on the lifting device of a fork lift truck can be attached. Under each prong or fork of the moving platform one or several rollers or wheels can be provided «These can be articulated connecting links be worn. If these are rotated around a pivot point by a drive device, this changes the vertical height (ground clearance) of the tines or forks «

A number of rollers or wheels can be placed under each prong or fork should be provided »whose rotating

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Bar-mounted connecting links are controlled by a powered connecting rod.

In a preferred embodiment are the rollers or wheels near the outer ends of the prongs or forks and also below the transverse component provided.

Close in a design according to the invention the fastening and fixing means a rear wall device, which is used for rigid connection is set up with the lifting device of the pallet truck, and a driven, retractable Connection extending between the backplane device and the movable platform, and a power connection, which is set up so that the power supply from the lift truck for actuation the connection is related. .. -

The retractable connection can thus include one or more hydraulic rams. These can be arranged to actuate a mechanical link, the two or more includes rotatably mounted arms.

In an expedient design, the rams can be supplied by a hydraulic power source, the atif the platform is carried.

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Alternatively, the ram can be set up so that they can be operated by a hydraulic Supply can be operated, drawn from the hydraulic system of the powered lift truck will.

The rams can be double acting and used to extend the platform. Included a cable and an electric (electrically powered) winch can be used to reclaim the platform to the rear wall device.

In an alternative preferred construction, the means for extending and retracting the platform include one or more powered rollers or wheels. Their drive includes a hydraulic or an electric motor and a power connection so is set up so that the power supply is drawn from the lift truck.

In this arrangement there are preferably means for controlling the platform in the horizontal plane intended.

The driven wheel can expediently be arranged under the transverse component be. It can be placed in such a way that it is a

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perpendicular axis "can be rotated and so controls the platform.

With this arrangement the wheel can be driven by a hydraulic motor carried by the platform will be driven. The rotational control movement of the driven wheel can be of a hydraulic ram can be controlled.

Preferably, the transverse structural element comprises two separate parts at a perpendicular distance from each other. * The upper part is attached to the prongs or forks. The lower part carries the driven wheel. There is a connection on it attached, which controls the wheels under the tines and forks, so that the relative movement the vertical height of the platform between the parts changes. ..

The relative movement between the parts can in turn by one or more hydraulic Stamp can be controlled.

The connection that controls the wheels under the tines or forks can be a cam lever include, the upper end of which is rotatably mounted on the upper part and ddssen cam surface an abutment rests against the lower part. The lower end of the lever is connected to a

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connecting rod articulated, which is a connecting link, by which a wheel or roller is supported, operated.

The lower part is preferably guided in vertically extending guides from the upper part to be worn.

In either case, the apparatus includes a system port adapted to obtain hydraulic power from the lift truck and including a pressure intensifier which receives two or more alternative lower pressure sources and raises these pressures to the working pressure for the moving platform, in this manner the hydraulic device on the platform can be connected to the lift truck, which work at other hydraulic pressures _e

The hydraulic ram and the motor can Appropriately controlled by electrohydraulic ^ valves.

The device also includes a controller one that is set up 30 that e ^ from the pallet truck and controls the actuation of the movable ice platform. It can be done from the driver's seat of the pallet truck operated off, although it could alternatively or additionally be set up so that it, if desired, another operator can operate the animal from outside the pallet truck.

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The invention can be carried out in many ways. However, two embodiments are now discussed by way of example with reference to the accompanying drawings: It shows

Fig. 1 is a side view of a device according to the invention on a Forklifts;

Fig. 2 is a front view of the device according to FIG. 1;

Fig. 3 is a side view of the movable platform, which in the construction according to Fig. 1 is used;

4t shows the top view of the platform according to FIG. 3;

v.

FIG. 5 is a perspective view of FIG

Platform used in an alternative construction;

6 shows the schematic representation of the connection for controlling the height the platform according to FIG. 5;

Figures 7 and 8 are schematic views showing how the apparatus is used can be and

9 is a perspective view of FIG

Device according to Fig. 5 in use.

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In the construction shown in FIGS. 1, 2, 3 and k , the lifting and loading device according to the invention is intended to be used in a front-loading fork lift truck, which is denoted by the reference number 1 in FIG. The forklift is equipped with the usual prongs or forks 2 which protrude from a support plate 3 and which can be moved up and down along the vertical column 4. This is therefore a standard forklift truck of the known type. The device comprises a movable platform 5 _t which is carried by rollers 6. The platform is in the form of four prongs 7,8,9,10 which are connected at one end to a transverse structural element in the form of a transverse part 11, the two central prongs 8 and 9 have channel-shaped cross-sections and the rollers 6 almost extend across its full width. The two outer prongs 7 and 10, however, are divided into two parts with a channel-shaped cross section. The outer part 12 of each tine contains rollers, the length of which is shorter than that of the rollers in the tines 8 and 9 ″. The inner channel-shaped cross-section 13 has suitable dimensions to accommodate the tines 2 of the fork lift truck.

Each roller 6 is carried by a link Ik which is rotatably mounted in the corresponding prong. Each connecting link 14 is articulated to a connecting rod 16 by means of a pin 15. One end of the rod 16 is mounted at 17 in the transmission part 18, which in turn can swing about a pin 19. In addition, the

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Part l8 at point 1? a hydraulic ram 20 is mounted. As shown in Fig. K , a punch 20 is provided for each prong. Each punch 20 is at 21 in a supporting plate 23
(not shown in Fig. k ) stored so that the
Part l8 is rotated around the pin 19 when the
The stamp is extended. The connecting rod moves in a linear direction away from part l8 and rotates all connecting links Ik against the
Clockwise as shown in FIG. This movement thus changes the position of the rollers 6 with respect to the prongs 7, 8, 9 and 10 and leads to the fact that the vertical height (ground clearance) of the platform is increased. The left part of Figure 3 shows the punch and the rollers 6 in their retracted positions; the right part of the figure shows
the rollers extended and the platform raised * In order to make FIGS. 1 and 2 clear, the stamp and the operating linkage of the rollers are not shown there. ... -

A rear wall 23 is provided which has cap fastening devices 2k . These are equipped with locking screws 25 with which they can be clamped firmly to the supporting plate 3 of the forklift 1. With the lower end of this plate 23 an extension connection, which is designated by the reference numeral 26, is connected in an articulated manner. It consists of a first pair of arms 27, the lower ends of which are mounted in the plate 23 at 28. The upper ends of these arms are through the pins 29 with a

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ηem second pair of extension arms 30 connected. These are connected at their upper ends by a transverse part 31. The lower ends of these arms 30 are provided with open-ended sockets 32 which cooperate with the pivot bearing lugs on the cross member 11 and are shown most clearly in Figures 3 and k .

A runs between each of the arms 27 and 30 hydraulic ram 3 ^ i the at. articulated on each arm is attached. Between the crossbar 31 and the transverse part 11 is a pair of double-acting hydraulic rams 35, which are articulated are. On the transverse part 31 is also an electrically operated winch 3 *> mounted, from which a cable 37 runs to the transverse part 11 "

The power for each hydraulic ram is obtained directly from the forklift 1 through a * hydraulic Line 38 related. This is carried by a take-up spool 39 of the known type. the hydraulic fluid is drawn from the forklift 1 by a pressure booster and is on raised a predetermined working pressure for the stamp. The stamps are by © Iektro-hydrai2, -lische Valves (not shown) are controlled and these are controlled by a control device ^ O that is carried by the forklift in a position where it can be operated by the driver. If desired, the control unit could be attached in such a way that it can be operated by another operator

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that stands at the side of the forklift or either by the driver or by a independent operator.

The dimensions of the channels 13 in the prongs 7 and 10 are chosen so that they are the prongs 2 of a Pick up a standard forklift. So the platform can be attached to these prongs 2 in the way shown on the left in FIG. To use the device it is therefore only necessary to clamp the rear wall 23 in place and to mount a platform 5 in place on the tine 2 of the forklift. The hydraulic The line is connected and the device can now be operated.

The overall shape of the platform is adjusted to match the shape of the load that usually stops with the forklift type is connected to which the device is to be adapted. I.e. ^ it must be the width of a Standard transport container adapted and relatively short in the case of a muzzle loader. In the case, in which the device is used with a side loader, it must be up to the maximum length of the container, but be relatively narrow. Different sizes and capacities can be used be provided to match the size and capacity of normal standard forklifts and side loaders, which are available to fit.

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If, for example, a load of 5 tons is to be moved as a single object, this would represent an insoluble problem for normal container loading. However, with the present invention, such a load can be placed on a pallet of suitable size and construction. A standard forklift truck such as that used to place the load on the pallet is then fitted with the device. For this purpose, the device is first picked up by the forklift truck moving its normal prongs into the channels 13. When the prongs 2 are fully retracted, the back plate is f iaciert in its position against the support plate 3. The entire device can now be connected hydraulically. If the electric winch j6 is also to be used, a suitable electrical connection with the forklift truck and the control device 4o is also established. The device is now raised by operating the truck in the normal way. The forklift approaches the pallet and pushes the forks, which carry the tines 7 »8» 9ilO, under the pallet and the load in the normal way. The load is now lifted and carried by the truck in the usual way, that is to say at normal speeds over normal distances and also up to the height that is possible for the truck. The forklift can now approach the open end of the container, align with the door, and insert the pallet and load, and set them down on the floor just behind the door. The hydraulic rams 20 are now actuated, see above

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that the wheels are extended. The weight of the load, the pallet and the platform is taken over by the rollers 6; the forks 2 of the truck are released. The extension device is now operated by actuating the rams 3 ^. This, due to the construction of arms 27 and 30, moves the platform and load away from the backplate. The right side of Fig. 1 shows the platform in a partially moved away position. It can be pushed down the container floor until the arms 27 and 30 almost form a line. Appropriate locks (not shown) are provided. They prevent the arms from going over the middle. The double-acting punches 35 are now actuated so that the lugs 33 with the bolts move out of the sockets 32; the platform is pushed further into the container. When the desired position is reached, the rollers 6 are partially retracted so that the platform can be pulled out from under the pallet. This is done by first operating the hydraulic winch 36, which pulls the pallet by means of the cable 37 into a position in which the studs 33 again touch the base 32 with the bolt. Now the ram 3k are operated in the opposite direction and pull the platform back onto the prongs 2 of the forklift. The device can now be lifted off and is ready to repeat the process with another load.

In order to unload a container containing such a load and pallet, the method

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vice versa. The device thus allows the loading and unloading of containers that are on the ground located, loaded on vehicles, or piled on top of each other, provided they can can be reached by operating the forklift.

By using the device, the need for point loads or high concentration is avoided Loads on floors of containers on the way between the end of the floor and the parking space the load in the case of I.S.O. containers, train containers and trolleys, road transport trolleys and various types of aircraft holds. In addition, the trunk lift truck is free for normal use at all other times when the Device is not connected to it. This leads to great economy in use and long life the appropriate mechanical operating equipment.

In FIGS. 5, 6, 7, 6 and 9, an alternative Construction of a lifting and loading device according to the invention shown. With this design, the movable platform 105 supported by rollers 106 attached to the outer ends of the two prongs 107 are. Each prong 107 in turn has a channel-shaped cross-section, but the rollers 106 are as mentioned above, only provided at the outer ends. The other ends of the prongs 107 are through a transverse structural element connected · This

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has the shape of two, vertically spaced apart parts; the upper part 108 has the shape of a frame with channel-shaped Cross-section with downwardly running sides 109 · These-act as perpendicular ones Guides for a lower frame. This includes the upwardly extending side parts HO and a lower transverse part 111. On the lower part is the load-bearing drive wheel 112, which is mounted in a pivot bearing 113. The wheel is driven by a suitable drive mechanism (not shown) driven by a hydraulic motor 114, which is expediently driven by may be of the radial piston type. The wheel can be driven by a double-acting punch 115 controlled by a turntable or shaft 11.6 and a suitable bracket 11 / is connected to the lower cross member 111.

The relative movement between the upper part 108 and the lower cross member 111 is now closed by a pair of hydraulic rams 118 in one descriptive type controlled.

The raising and lowering of the rollers 106 is achieved through a mechanical connection, the is shown most clearly in FIG. Each set of three wheels 106 is located on each tine 107 at a carriage 119 »the one at 120 in one Toggle lever 121 is articulated. The other end of the lever is in a connecting link at 122

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rod 123 articulated along a separate channel (not shown) within each prong 106 extends to a swinging cam lever 124. At this point it is articulated at 125 stored. As can be seen from Fig. 5, a rocking cam lever is provided on each side of the platform. Its top end is hinged at 126 in one of the downwardly extending sides 109 of the upper part 108. Each swinging cam lever 124 has a cam surface 127 »which rests against an abutment in the form of a bumper 128. That bumper is attached at the bottom to a side part 110 of the lower transverse part 111.

In order to supply the motor 114 and the rams 115 and Il8 with working fluid, they are with the reference numeral 129 designated hydraulic lines are provided. So can the stamps 118 are actuated and the parts 108, III are moved out of each other in the vertical direction, where the prongs 107 are raised with respect to the drive wheel 112. During this movement takes place, the cam surfaces 127 on the swinging cam arms 124 move over the pushrods 128. As a result, the connecting rods 123 move the toggle levers 121 and thus lower at the same time rolls 1O6 off. The total height of the, platform can thus be increased or decreased by actuating the punch 118.

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1"

Again, electro-hydraulic valves are provided in the hydraulic equipment. Connecting lines and cables (not shown in Fig. 5) run again to a suitable control device kO on the lift truck via a take-up reel 39

In Figs. 7, 8 and 9 it is shown how this Type of lifting and loading device is operated. Fig. 7 shows a forklift with the platform is provided, as it is a container, which is marked with the reference number I30, approaches, its lifting device lowers and the load, which is indicated by the reference number 131, is shown in introduces the opening of the container. The rollers and the drive wheel 112 are lowered and the Load continues to be introduced until drive wheel 112 is also in the container. By pressing the Control unit l40 is the hydraulic motor 114 driven and the platform moves together with the load 131 away from the forks of the forklift, as shown in Fig. 8, until it is a suitable one Position reached where the load 13I is to be deposited. In the meantime, it becomes through actuation of the punch II5 controlled which the controllable drive wheel 112 is controlled. When the load is reached, the The ram II8 is operated, so that the parts I08 and can approach each other. As a result, the load, which is arranged on a suitable pallet (reference number 132 in FIG. 9), is lowered, until it is supported by the lower surface of the container. Now the motor Il4 is operated again and

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the unloaded platform 105 back to the forklift drawn as shown in FIG. In this figure, however, the forklift is off the container Shown withdrawn to make the drawing clearer, although the situation is in reality would be that shown in FIG. The platform 105 is withdrawn and on the prongs of the forklift 1 is reversed by controlling the wheel 112 by the ram II5. When the platform is in the correct position again, the pallet truck can lift it and move on to another Use to be moved away. '

In the arrangements described above, the hydraulic power is drawn from the forklift truck 1. However, many alternative arrangements could be used, e.g. only electrical power can be drawn from the pallet truck and the hydraulic power source 'could be limited to the platform; hydraulic pressure could be achieved by one through one Electric motor driven pump is operated. The actuation of the various components could also be used done by electric motors when it would be more convenient.

The drive wheel 112 could be located on one side of the platform if it were necessary to to avoid interference with a device already provided on the forklift truck * If desired, swivel castors could be placed on each side of the

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teren end of the prongs 107 in the construction according to Fig. 5 can be provided to further balance the platform when it is in its lower Location is.

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Claims (22)

6359/01 / üO / gn - 21 - 1 /. April 1973 EXPECTATIONS l.jLifting and loading device for use with a lift truck provided with a drive, characterized in that it includes a moving platform supported by wheels or rollers and their vertical Height can be increased or decreased, Means for fixing ^and fixing of the moving platform on the lifting device of the pallet truck with which it is to be used, and Drive means which are set up so that they receive their power supply from the lift truck or refer to the lift truck drive to extend the moving platform away from the lifting device and to retract it of the movable platform to and on the lifting device of the pallet truck on any adjacent horizontally extending Area that the platform supports. 2. Lifting and loading device according to claim 1, characterized marked eichnet that the moving loading platform takes the form of a - 22 - 309843/0535 6359/01 / üO / gn - 22 - 17 ♦ April 19 - 3 Fork has two or more prongs that have a transverse member at one end are connected. 3 · Lifting and loading device according to claim 2, characterized in that the prongs or one or more of the prongs are provided with channels or pockets, with which the platform can be attached to the lifting device of a forklift * 4. lifting and loading device according to claim 2 or 3, characterized g ekennz e i c hne t that one or more rollers or wheels under each prong or fork of the moving platform are provided, which are supported by hinged links, their Rotation around a pivot point by a «driven Device changes the vertical height of the tines or forks (e.g. lifting the Platform opposite the floor). 5 · Lifting and loading device according to claim 4, characterized in that A number of rollers or wheels are provided under each prong or fork, * their articulated ones stored connecting links controlled by a powered connecting rod will. - 23 - 309843/0535 6359/01 / UO / gn - 23 - 17 »April x97j 6. Lifting and loading device according to one or more of claims 2 to 5 »characterized in that near the outer Ends of the prongs and also provided rollers or wheels under the transverse component are. 7 · Lifting and loading device according to one or more of claims 1 to 6, characterized in that the fastening and Fixation device includes a backplate assembly (23) designed to be rigid Connection with the lifting device of the pallet truck is set up, and a driven, retractable (e.g. distance changes about • 4.n system 26,27 etc.) connection (26,27) »which runs between the backplate assembly and the moving platform, and a power connection, which is arranged so that it is the power supply from the lift truck or its drive. 8. lifting and loading device according to claim 7 »marked eichnet that the retractable connection one or more hydraulic rams z. B. Striving to work, Includes stamp. 309843/0535 6359/01 / UO / gn - 2k - April 17, 1973 9. lifting and loading device according to claim 8,
marked by the fact that
the hydraulic ram or ram a
mechanical connection actuate the off
two or more articulated arms
(26,27) exists. 10. Lifting and loading device according to claim 8 or 9, characterized in that the ram or ram is actuated by a hydraulic power source, the
is carried on the platform. 11. Lifting and loading device according to claim 8 or 9 »characterized in that the ram (s) set up ao
are that they are operated by a hydraulic supply that is drawn from a hydraulic mechanism or system on the powered lift truck. 12. Lifting and loading device according to one or more of claims 9 to 11, characterized ge ken nz eichnet that the ram or jacks are double, effective and to extend
of the platform are used, wherein a Kjabel and ei _v ne electric (electrically powered) winch is used to return it back to the rear wall arrangement. - 25 - 309843/0535 6359 / 0l / UO / gn - 25 - 17- April 19V 3 13. Lifting and loading device according to one or more of claims 1 to 6, characterized in that the device to extend and retract the platform one or more driven rollers or Includes wheels that have a hydraulic (or pneumatic) or electric drive, for example Includes a motor and a Lexst connection which is arranged so that ar draws the power supply from the pallet truck. lk. " Lifting and loading device according to Claim 13, characterized in that it contains means for controlling the platform in the horizontal plane. 15 · Lifting and loading device according to claim 13, or Ik, characterized in that the drive wheel is under the transverse component (11). l6. Lifting and loading device according to claim 15 »characterized in that the Drive wheel (112) are rotated around a vertical axis in a circle (controlled) can to control the platform. 17 · Lifting and loading device according to claim I5 or l6, characterized in that - 26 - 309843/0535 6359 / Ol / UO / gn - 26 - April 17th 1973 the wheel by a hydraulic motor (H5) t carried on the platform, is driven. l8. Lifting and loading device according to claim 17 _f, characterized in that the rotary control movement of the drive wheel is controlled by a hydraulic ram (struts, ram). 19 · Lifting and loading device according to one or more of Claims 15 to 18, characterized in that it is ken nz shows that the transverse structural element is two perpendicularly spaced mutually located parts (108,111) comprises, wherein the upper part (108) on the prongs or Forks is attached and the lower part (ill) carries the drive wheel and with a connection which controls the wheels under the tines or forks so that the Relative movement between the parts the vertical height (floor distance) of the platform changes. 20. Lifting and loading device according to claim 19, characterized gekennz eichnet that the relative movement between the parts by a or several hydraulic ram (struts, rams) is controlled. - 27 - 309843/0535 6359/01 / UO / gn - 27 - IT- Ayril 1973 21. Lifting and loading device according to claim 20, characterized in that the Connection that controls the wheels under the tines or forks, a cam lever (12 * 1, Lever with cam track 127) includes, the upper end of which is hinged to the upper part and the cam surface (127) of which rests against an abutment (128) on the lower part, the lower end of the lever being articulated in a connecting rod (123) which operates a link on which a wheel or roller is supported. 22. Lifting and loading device according to claim 19t 20 or 21, thereby marked z. eic hn e t that the lower part in perpendicular Guides carried by the upper part is guided. 23 · Lifting and loading device according to one or more of claims 1 to 22, characterized in that they have a power connection contains, which is set up so that it draws the hydraulic power supply from the lift truck and a pressure booster that receives two or more alternative sources of lower pressure (or alternatively can be connected to it) and it to a working pressure -for the movable Platform lifts. : 28-309843 / 0535 6359/01 / UO / gn - 2δ - April 17, 1973 2k. Lifting and loading device according to one or more of Claims Λ to 23 »characterized in that the hydraulic ram and the motor are controlled by electro-hydraulic valves. 25 · Lifting and loading device according to one or more of Claims 1 to 2k, characterized in that it includes a control device which is set up so that it is carried by the lift truck to control the activity of the movable platform. 3 0 98 4 3/0535 L e r s "e i t e