EP1362821A1 - Straddle carrier - Google Patents

Abstract

Joint bolts (5,6) both sides of the top frame (4) and the carriage beams (3) are for telescopic bearers (1,1a,1b,1c) between frame and carriage beams, each bearer (1,1a,1b,1c) allotted a pressure cylinder (2) between respective beam (3) and securement. The spacing between top frame (4) and beams (3) varies parallel and normal and the carriage beams take load as the bearers and cylinder move at the same time. Both sides of the vehicle are pairs of criss-crossing bearers and their cylinders plus an allocated drive. A clamp between bearers (1 and 1c) adjusts in height at their intersection to keep the bearers clamped securely at all levels. The bearers (1,1a,1b, 1c) come in three telescopic parts (1,1a,1b,1c) with pulleys (9,17) on the bottom part (1c) for a return rope (12,13) and a further pulley (17) for the bolt (5) and pulley supports for the up and down movements of the pulley (9).

Description

The invention relates to a straddle carrier according to the preamble of the first Claim.

The straddle carrier according to the invention is suitable for transporting containers and stacked on top of one another, with the present portal pallet truck being relatively large Stacking heights of containers that can be run over on both sides can be achieved.

Gantry pallet trucks with which containers can be stacked one on top of the other in one or two rows known. Portal cranes or others are usually used to create higher stacks Devices used. But these are relatively expensive.

DE 197 14 410 A1 describes a straddle carrier consisting of a lower and a lower Upper frame, known, a large stack height is achieved by the fact that between the Upper and the lower frame at least in two parts and articulated against each other Scissor systems are operated. However, this system has the disadvantage that a sliding center of gravity of the load exists and there is a different load depending on the height of the container to be transported is located, which affects the stability of the transport vehicle and its driving behavior. Farther the selected scissor construction has the disadvantage that constructive measures for a high stability must be taken.

It is therefore an object of the invention to develop a straddle carrier, its function not based on the scissors principle and with no disadvantages in terms of stability are to be expected if loads have to be transported at different heights.

This task is carried out by a straddle carrier according to the characteristics of the first Claim resolved.

Sub-claims reflect advantageous embodiments of the invention.

The straddle carrier according to the invention consists of a carriage with a chassis, an upper frame with the load handler and the cab, the distance is changeable between the upper frame and the chassis using the lifting system.

The invention is characterized in that on each side of the upper frame and Carrier fixed hinge pin for telescopic beams between the frame and Carriers are arranged. On each of the four and telescopic carrier acts a pressure cylinder that between the driving beam and the relevant Carrier part, namely the lower support part is attached. The distance between the top frames and the carrier is changed parallel and perpendicular with the same load transfer in that a simultaneous movement of the multi-part carrier and the pressure cylinder take place. It is advantageous, the telescopic carrier, which are operated synchronously, with a higher To operate pressure than the pressure cylinder.

It is also advantageous if there are two telescopic carriers on each side of the Cross gantry trucks and with a single drive on each side of the vehicle operate.

Furthermore, it is advantageous to have a height-adjustable between two crossing beams Arrange the tensioning element in the crossing points of two beams so that the two beams can be clamped together in any height position.

The telescopic supports each consist of several, preferably three parts, in or on which supports and pulleys for pull-out and return cables are arranged, which in happens in the following way. On the lower support part there is a fixed hinge pin Deflection roller downwards and a support for a deflection roller upwards. in the middle support part is a support for a pulley down and a support for one Deflection roller arranged upwards, with a pull rope from the drive via a deflection roller on the fixed hinge pin and to a pulley on a support of the lower beam leads to an attachment to the middle beam. Another pull-out rope leads from the middle one Carrier via a deflection roller on a support for attachment to the upper carrier. at Actuation of the pull-out rope, the carrier parts of all carriers can be pushed upwards at the same time, where there are return ropes for a smooth return, which are driven by the drive a pulley on the fixed hinge pin for attachment to the middle bracket lead, with another return rope from the attachment to the lower support via a Deflection roller on the support leads to an attachment to the lower beam.

Parallel deflection rollers are arranged on the fixed hinge pins, so that both the return rope and the pull-out rope can be deflected on the same axis.

It is advantageous to use an electric motor for the drive, but also other motors are suitable.

It is also advantageous to drive a four-track cable drum by the drive motor. This has the advantage that a telescopic carrier on each side of the vehicle single drive, each on the left and on the right side of the vehicle is arranged can take place. Access to the driver's cab at any time is via extendable ladder possible. The straddle carrier thus fulfills high safety requirements for the operating personnel. There are adjustable energy chains on the telescopic carriers arranged. The vehicle drive can be arranged on the upper frame and / or on the chassis his. In order to avoid vibrations, the spreader is fitted with a shock absorber. It is important that the vehicle always has a speed that is adapted to its height. Therefore, travel speed devices are installed, depending on the height of the vehicle carry out an automatic speed regulation. Are in the hinge pin Bracing elements built in, which enable play-free storage. To be a simple and Securing safe procedures in container aisles is a side adjustment on the spreader arranged. It is also advantageous to have bracing elements in the individual carrier parts install. This can be the case, for example, with clamping strips at the beginning or end of the carrier strips his. The carrier parts can thus form a rigid carrier. The bracing elements in the Carrier parts can be set centrally and switched manually or automatically.

Figur 1:

erfindungsgemäßer Portalhubwagen in Seitenansicht und eingezogenen Trägern

Figur 2:

erfindungsgemäßer Portalhubwagen in Seitenansicht mit ausgefahrenen Trägern

Figur 3:

erfindungsgemäßer Portalhubwagen in drei verschiedenen Arbeitsstellungen über einem Stapel von Containern

Figur 4:

Teleskopträger mit eingezogenen Seilzugantrieb

Figur 5:

Teleskopträger mit ausgefahrenem Seilzugantrieb

Figur 6:

vierspurige Seiltrommel mit parallelen Umlenkrollen an den feststehenden Gelenkbolzen des Unterwagens

Figur 7:

sich kreuzende Träger mit Verspanneinrichtung

Figur 8:

Längsdarstellung eines Containerstapels mit eingefahrenem Portalhubwagen

Figur 9:

Querschnitt eines Containerstapels mit in der Gasse stehenden eingefahrenem Portalhubwagen

The invention is explained in more detail below using an exemplary embodiment and 7 figures. The figures show:

Figure 1:

Portal pallet truck according to the invention in side view and retracted carriers

Figure 2:

Portal pallet truck according to the invention in side view with extended carriers

Figure 3:

Portal pallet truck according to the invention in three different working positions over a stack of containers

Figure 4:

Telescopic carrier with retracted cable drive

Figure 5:

Telescopic carrier with extended cable drive

Figure 6:

four-lane rope drum with parallel pulleys on the fixed hinge pins of the undercarriage

Figure 7:

intersecting beams with bracing

Figure 8:

Longitudinal representation of a stack of containers with a retracted straddle carrier

Figure 9:

Cross-section of a container stack with the portal pallet truck in the aisle

Figure 1 shows a straddle carrier consisting of the upper frame 4 and Carrier 3, a cab 19 being arranged on the upper frame 4 and between Upper frame 4 and the carriage 3 on each side of the vehicle two pressure cylinders 2 and two telescopic carriers 1 are arranged. Between the fixed hinge pins 5,8 The drive 10 for the telescopic carrier 1 is arranged on each side. The vehicle drive 24 is located on the chassis 3. To reach the cab 19 is on the telescopic Carrier 1 has an extendable ladder 27 which corresponds to the length of the carrier 1 their length changes.

FIG. 2 shows, as on each side of the straddle carrier, the upper frame 4 and the carriage 3 with the telescopic supports 1 via fixed hinge pins 5, 6 and the pressure cylinders 2 are connected with joints 7, 8 to the traveling support 3 and the lower support part 1c. from Drive 10 and the rope drum 11, which is designed as a four-rope drum, guide the pull-out the return rope 12, 13 over the rollers 9 of the fixed hinge pin 5 on each side the telescopic carrier 1 into this. The hinge pins 5 and the deflection rollers 17 are arranged on pedestals 26. The extendable ladder 27 ensures that the cab 19 can also be left with extended beams 1. On a telescopic carrier 1 the adjustable energy chain 28 is arranged. At the joints 8 are pulleys 25 for the pull rope 12 is arranged. The spreader touchdown 23 is between the Upper frame 4 and the spreader 21 arranged and prevents vibration of the Vehicle when the spreader 21 is placed on the container 20.

Figures 4 and 5 show how the telescopic beams 1, 1a, 1b, 1c are constructed and illustrate their function, the pull-out rope 12 leading into the lower support part 1c and there via a support 14 under its roller 9 for attachment to the lower end of middle support part 1a. Another pull-out rope 12 leads from the lower end of the lower part 1c via a support 15 and its roller 9 to the upper support part 1b. All three parts are 1a, 1b, 1c connected by return cables 13, with a first return cable 13 from the lower one Point of the upper support part 1b via a roller 9 on the support 16 to the upper point of the lower carrier 1c leads and another return rope 13 from the lower point of the middle Carrier 1a via a roller 9 of the fixed hinge pin 5 to the rope drum 11. Die Rope drum 11 and the drive 10 are in operation of the pull-out and return rope 12, 13 in shown in Figure 6. The rollers 9 are on the axis of the fixed hinge pin 5 below two telescopic carriers 1 arranged. So that with a drive 10 at the same time the operation of two telescopic carriers 1 on each side of the transport pallet truck done synchronously. In parallel, the pressure cylinders 2 are retracted and extended so that the Transport pallet truck has the advantage that with constant load transfer in the rack 3 the upper frame 4 parallel and perpendicular with high driving stability of the vehicle transporting containers can take place.

FIG. 6 shows the lower carrier parts 1c between which one is driven by the motor 10 Cable drum 11 is arranged, each of the pull-out 12 and the return cables 13 each Carrier part 1c wound up or unwound. The ropes 12, 13 are on the pulleys 17 of the Articulated pin 5 deflected into the carrier 1c.

In order to achieve high stability between the telescopic carriers, it has proven to be Proven sensibly, the lower support parts 1c to each other by means of bracing elements brace, as shown in Figure 7.

FIG. 3 shows the straddle carrier according to the invention above containers 20 in different Working positions and lifting heights of the upper frame 4. The driving beams 3 have separate parts on both sides of the container 20 to be driven over, which function synchronously.

FIG. 8 shows the longitudinal representation of a container stack 20 with a straddle carrier retracted beams 1 between the upper frame 4 and the moving beams 3. As the example shows, the straddle carrier is able to transport individual containers 20 from high stacks Take rows.

From Figure 9 is a gantry truck standing in the alley when grabbing an individual Containers 20 in the lowest position with upper frame 4 and carriage 3, one on the right arranged cab 19, the spreader-side adjustment 22 and the spreader touchdown 23 can be seen.

List of the reference symbols used

1

telescopic carrier

1a, 1b, 1c

support parts

2

pressure cylinder

3

mobile carrier

4

top frame

5

fixed hinge pin between 1 and 3

6

fixed hinge pin between 1 and 4

7

Joint at 1c

8th

Joint on 3rd

9

roll

10

Cable drum drive

11

cable drum

12

Ausziehseil

13

return cable

14

Support in 1c

15

Support in Figure 1a

16

Support on 1 a

17

Pulleys on 5

18

bracing

19

cabin

20

Container

21

spreader

22

Spreader-side adjustment

23

Spreader Aufsetzdämpfung

24

Vehicle drive

25

Deflection roller on 3rd

26

bearing block

27

Extendable ladder

28

Adjustable energy chain

Claims (9)

Gantry truck, consisting of two trolleys with a chassis, an upper frame with load handling device and driver's cab, the distance between the trolleys and upper frame being changeable by means of a lifting system, characterized in that fixed articulated bolts (5, 6) for telescopic supports (1, 1a, 1b, 1c) are arranged between the frame (4) and travel supports (3) on each side of the upper frame (4) and the travel supports (3), on each carrier (1, 1c) a pressure cylinder (2) acts between a fastening (8), a travel carrier (3) and a fastening (7) on the carrier (1), the distance between the upper frame (4) and the driving beams (3) is changed parallel and perpendicular with uniform load introduction into the driving beams (3) with simultaneous movement of the multi-part beams (1,1a, 1b, 1c) and the pressure cylinder (2). Gantry truck according to claim 1, characterized in that on each side of the vehicle two intersecting telescopic supports (1,1a, 1b, 1c) with two pressure cylinders (2) and a drive (10) are arranged. Gantry pallet truck according to claims 1 and 2, characterized in that a bracing element (18) is arranged between the crossing beams (1, 1c) and is adjustable in height at the point of intersection of two beams (1, 1c) so that the two beams (1, 1c) can be clamped together in any height position. Gantry truck according to claims 1 to 4, characterized by telescopic carriers of three parts (1a, 1b, 1c) in or on its supports (14, 15, 16) with deflection pulleys (9) for a pull-out and a return rope (12, 13), a deflection pulley on the lower support part (1c) (17) on the fixed hinge pin (5) and a support (14) for a deflection roller (9) upwards, on the central support part (1a) a support (16) for a deflecting roller (9) downwards and a support (15) for a deflecting roller (9) are arranged upwards and a pull-out rope (12) from the drive (10, 11) via a Deflection roller (17) on the fixed hinge pin (5) and leads to a further support (12) for attachment to the central support part (1a), a pull-out rope (12) from the central support (1a) via a deflection roller (9) on the support (15) leads to an attachment to the upper support (1b) and a return cable (13) from the drive (10, 11) via a deflection roller (17) on the fixed hinge pin (5) leads to an attachment to the central support (1a) and a return cable (13) from an attachment to the lower support (1c) a deflection roller (9) on the support (16) leads to an attachment to the upper support (1b). Gantry truck according to claim 4, characterized in that two parallel deflection rollers (17) are arranged on the fixed hinge pin (5). Gantry truck according to claims 1 to 5, characterized in that the drive (10) via an electric motor and a four-track cable drum. Gantry pallet truck according to claims 1 to 6, characterized in that the vehicle drive (24) is arranged on the driving beam (3) and / or on the upper frame (4). Gantry truck according to claims 1 to 7, characterized in that driving speed devices are installed which carry out an automatic speed regulation depending on the height of the vehicle. Gantry truck according to one of claims 1 to 8, characterized in that bracing elements are built into the individual support parts (1a, 1b, 1c), which can form a rigid support from the individual support parts (1a, 1b, 1c) if required.

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