EP1362821B1 - 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 stacking them on one another, whereby relatively large stacking heights of containers, which are traversed on both sides, can be achieved by the present straddle carrier.

Straddle carriers, with which containers in one or two rows are stacked, are known. Gantry cranes or other devices are typically used to create higher stacks. These are relatively expensive.

From DE 197 14 210 A1 a straddle carrier, consisting of a lower and a top frame, known, with a large stack height is achieved in that between the upper and the lower frame at least two-piece and against each other articulated trained scissors systems are operated. However, this system has the disadvantage that a sliding center of gravity of the load is present and there is a different load on the wheels, depending on the height at which the container to be transported is, including the stability of the trolley and its handling suffer. Furthermore, 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 whose function is not based on the principle of scissors and in which no disadvantages in terms of stability can be expected when loads have to be transported at different heights.

This object is achieved by a straddle carrier according to the features of the first claim.

Subclaims give advantageous embodiments of the invention again.

The straddle carrier according to the invention consists of a driver with a chassis, a top frame with the load-carrying means and the cab, the distance between the upper frame and the carrier by means of lifting system can be changed.

The invention is characterized in that on each side of the upper frame and the driver stationary hinge pins are arranged for telescopic support between the frame and carriers. On each of the four located on the straddle carrier and telescoping carrier acts a pressure cylinder which is mounted between the carrier and the relevant support member, namely the lower support member. The distance between the upper frame and carrier is changed in the same load introduction parallel and perpendicular by the fact that a simultaneous movement of the multi-part carrier and the pressure cylinder take place. It is advantageous to operate the telekopierbaren carrier, which are operated synchronously, with a higher pressure than the printing cylinder.

Furthermore, it is advantageous if two telescoping carriers intersect on each side of the straddle carrier and are operated with a single drive on each side of the vehicle.

Furthermore, it is advantageous to arrange a height-adjustable tensioning element in the points of intersection of two carriers between two intersecting carriers so that the two carriers can be braced with one another in any height position.

The telescopic supports consist of several, preferably three parts, in or on which supports and pulleys for pull-out and return ropes are arranged, which is done in the following manner. At the lower carrier part, a deflection roller is arranged downwards and a support for a deflection roller on the fixed hinge pin upwards. In the central support part, a support for a pulley down and a support for a pulley is arranged upwards, wherein a Ausziehseil from the drive via a pulley on the fixed hinge pin and a pulley on a support of the lower support leads to a mounting on the central support. Another Ausziehseil leads from the central support via a pulley on a support to a mounting on the upper support. Upon actuation of the Ausziehseiles the support members of all carriers are simultaneously pushed upwards, for a smooth retraction return cables are present, which lead from the drive via a pulley on the fixed hinge pin to a mounting on the middle support, with another return rope from the attachment to the lower support via a pulley on the support leads to a mounting on the lower support.

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

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

Furthermore, it is advantageous to drive a four-lane cable drum by the drive motor. This has the advantage that telescopic supports can be made on each side of the vehicle by a single drive, which is arranged respectively on the left and on the right side of the vehicle. The access to the driver's cab at any time is possible by means of pull-out ladder. Thus, the straddle carrier meets high security requirements for the operating personnel. On the telescopic supports adjustable energy chains are arranged. The vehicle drive may be arranged on the upper frame and / or on the driving carrier. In order to avoid vibrations, a Aufsetzdämpfung is arranged on the spreader. It is important that the vehicle always has a speed adapted to its height. Therefore, driving speed devices are installed, which make an automatic speed regulation depending on the height of the vehicle. In the hinge pins Verspannelemente are installed, which allow a play-free storage. To ensure a simple and safe process in container alleys, a lateral adjustment is arranged on the spreader. Furthermore, it is advantageous to install clamping elements in the individual carrier parts. This can be, for example, clamping bars at the beginning or at the end of the carrier strips. Thus, the carrier parts can form a stiff carrier. The bracing elements in the support parts can be adjusted 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

In the following, the invention will be explained in more detail using an exemplary embodiment and FIGS. The figures show:

FIG. 1:

Inventive straddle carrier in side view and retracted straps

FIG. 2:

Inventive straddle carrier in side view with extended straps

FIG. 3:

Inventive straddle carrier in three different working positions over a stack of containers

FIG. 4:

Telescopic carrier with retracted cable drive

FIG. 5:

Telescopic carrier with extended cable drive

FIG. 6:

four-lane cable drum with parallel pulleys on the fixed hinge pin of the undercarriage

FIG. 7:

intersecting beams with bracing

FIG. 8:

Longitudinal view of a container stack with retracted straddle carrier

FIG. 9:

Cross section of a container stack with in-the-way retracted straddle carrier

1 shows a straddle carrier consisting of the upper frame 4 and the driver 3, wherein the upper frame 4, a cab 19 is arranged and between the upper frame 4 and the carrier 3 on each side of the vehicle, two impression cylinder 2 and two telescopic support 1 are arranged. Between the fixed hinge pin 5.8 each side of the drive 10 is arranged for the telescoping carrier 1. The vehicle drive 24 is located on the carriage 3. To reach the cab 19, an extendable ladder 27 is arranged on the telescopic support 1, which changes according to the length of the carrier 1 its length.

FIG. 2 shows how on each side of the straddle carrier upper frame 4 and carrier 3 are connected to the telescoping carriers 1 via fixed hinge pins 5, 6 and the pressure cylinders 2 with joints 7, 8 to the carrier 3 and the lower carrier part 1c. From the drive 10 and the cable drum 11, which is designed as a four-reel drum, the pull-out and the return rope 12,13 on the rollers 9 of the fixed hinge pin 5 on each side of the telescoping carrier 1 in this. The hinge pins 5 and the guide rollers 17 are arranged on bearing blocks 26. The extendable ladder 27 ensures that the driver's cab 19 can be left even when the carriers 1 are pulled out. On a telescopic support 1, the adjustable energy chain 28 is arranged. At the joints 8 pulleys 25 are arranged for the pull-out 12. The Spreader-Aufsetzdämpfung 23 is disposed between the upper frame 4 and the spreader 21 and prevents vibration of the vehicle when placing the spreader 21 on the container 20th

Figures 4 and 5 show how the telescoping support 1, 1a, 1b, 1c are constructed and illustrate their function, the Ausziehseil 12 leads into the lower support part 1c and there via a support 14 under its role 9 for attachment to the lower End of the middle support part 1a. Another Ausziehseil 12 leads from the lower end of the lower part 1c via a support 15 and the roller 9 to the upper support part 1b. All three parts 1 a, 1 b, 1 c are interconnected by return cables 13, wherein a first return cable 13 from the lower point of the upper support member 1 b via a roller 9 on the support 16 to the upper point of the lower support 1 c leads and another return rope 13 from the lower Point of the middle carrier 1a over a roller 9 of the fixed hinge pin 5 to the cable drum 11. The cable drum 11 and the drive 10 are shown in the operation of the pull-out and return rope 12,13 in Figure 6. The rollers 9 are arranged on the axis of the fixed hinge pin 5 under two telescopic supports 1. This can be carried out synchronously with a drive 10 at the same time on each side of the Transporthubwagens the operation of two telescopic supports 1. In parallel, the impression cylinder 2 are extended and retracted, so that the transport truck has the advantage that with constant load introduction in Fahträger 3, the upper frame 4 can be parallel and perpendicular with high driving stability of the vehicle in containers to be transported.

FIG. 6 shows the lower carrier parts 1c between which a cable drum 11 driven by the motor 10 is arranged, each of which has the pull-out 12 and the return cables 13 of each Carrier part 1c up or unwound. The ropes 12, 13 are deflected at the deflection rollers 17 of the hinge pin 5 in the carrier 1c.

In order to achieve a high stability between the telescoping supports, it has proved to be useful to clamp the lower support parts 1c together by means of bracing elements, as shown in FIG.

FIG. 3 shows the straddle carrier according to the invention via containers 20 in different working positions and lifting heights of the upper frame 4. The carriers 3 have separate parts on both sides of the container 20 to be crossed, which function synchronously.

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

From Figure 9, a straddle carrier in the alley standing when gripping a single container 20 in the lowest position with upper frame 4 and driving beams 3, a right-hand cab 19, the spreader side adjustment 22 and the Spreader Aufsetzdämpfung 23 can be seen.

List of reference numbers used

1

telescopic carrier

1a, 1b, 1c

support parts

2

pressure cylinder

3

mobile carrier

4

top frame

5

fixed hinge pins between 1 and 3

6

fixed hinge pins between 1 and 4

7

Joint at 1c

8th

Joint on 3

9

roll

10

Cable drum drive

11

cable drum

12

Ausziehseil

13

return cable

14

Support in 1c

15

Support in 1a

16

Support at 1a

17

Pulleys on 5

18

bracing

19

cabin

20

Container

21

spreader

22

Spreader-side adjustment

23

Spreader Aufsetzdämpfung

24

Vehicle drive

25

Deflection pulley on 3

26

bearing block

27

Extendable ladder

28

Adjustable energy chain

Claims (9)

1. A straddle carrier consisting of two carriage beams (3), a top frame (4) with load receiving means (21) and a driver cabin (19), with the distance between the carriage beams (3) and the top frame (4) being variable by means of a hoist system, characterized in that

   - on either side of the top frame (4) and of the carriage beams (3) there are disposed, between said frame (4) and said carriage beams (3), stationary hinge bolts (5, 6) for telescoping beams (1, 1a, 1b, 1c),

   - on each beam (1, 1c), a lift cylinder (2) acts between a fastening means (8) on the carriage beam (3) and a fastening means (7) on the beam (1),

   - the distance between said top frame (4) and said carriage beams (3) is changed parallely and perpendicularly while the load is uniformly introduced into the carriage beams (3) and the multipart beams (1, 1a, 1b, 1c) and the lift cylinders (2) move simultaneously.
2. The straddle carrier as set forth in claim 1, characterized in that two crossing telescoping beams (1, 1a, 1b, 1c) with two lift cylinders (2) and one drive (10) are disposed on either side of the vehicle.
3. The straddle carrier as set forth in the claims 1 and 2, characterized in that a clamping element (18) is disposed between the crossing beams (1, 1c) in the crossing point of two beams (1, 1c) so as to be height-adjustable and in such a manner that the two beams (1, 1c) are clampable together in any height position.
4. The straddle carrier as set forth in any one of the claims 1 through 4, characterized by telescopable beams consisting of

   - three parts (1a, 1b, 1c) in or on its supports (14, 15, 16) with deflection pulleys (9) for an unwindable and retractable cable (12, 13), with a deflection pulley (17) on the stationary hinge bolt (5) and a support (14) for an upward deflecting pulley (9) being disposed on the lower beam part (1c),

   - a support (16) for a downward deflecting pulley (9) and a support (15) for an upward deflecting pulley (9) being disposed on the central beam part (1a) and an unwindable cable (12) leading from the drive (10, 11) via a deflection pulley (17) on the stationary hinge bolt (5) to another support (12) and to a fastening means on the central beam part (1a),

   - an unwindable cable (12) leading, from the central beam (1a), via a deflection pulley (9) on the support (15), to a fastening means on the upper beam (1b) and

   - a retractable cable (13) being led by the drive (10, 11) via a deflection pulley (17) on the stationary hinge bolt (5) to a fastening means on the central beam (1a) and a retractable cable (13) leading, from a fastening means on the lower beam (1c), via a deflection pulley (9) on the support (16), to a fastening means on the upper beam (1b).
5. The straddle carrier as set forth in claim 4, characterized in that two parallel deflection pulleys (17) are disposed on the stationary hinge bolt (5).
6. The straddle carrier as set forth in the claims 1 through 5, characterized in that the drive (10) occurs through an electric motor and a four-groove cable drum.
7. The straddle carrier as set forth in the claims 1 through 6, characterized in that the vehicle drive (24) is disposed on the carriage beam (3) or/and on the top frame (4).
8. The straddle carrier as set forth in the claims 1 through 7, characterized in that travel speed systems are incorporated for automatically regulating the speed as a function of the height of the vehicle.
9. The straddle carrier as set forth in any one of the claims 1 through 8, characterized in that in the various beam parts (1a, 1b, 1c) there are incorporated clamping elements for transforming the discrete beam parts (1a, 1b, 1c) into a rigid beam if the need arises.

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