FI57383B - TRANSPORTATION FOER TRANSPORTATION AV VAGNAR MELLAN VAONINGAR - Google Patents

Description

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Switzerland-Switzerland (CH) * + 539/69 (71) Inventio Aktiengesellschafts 6052 Hergiswil NW, Switzerland-Switzerland (CH) (72) Karl Engeler, Schlieren, Switzerland-Switzerland (CH) (7 * 0 Leitzinger Oy (5 * + ) Transport device for transporting wagons between floors - Transport-anordning för transportering av vagnar mellan väningar

The invention relates to a transport device for transporting carriages between layers, in particular for transporting shopping carts in shops where the carriages run on a floor-to-floor conveyor track on guide rails

Transport devices of the above-mentioned type for transporting shopping trolleys from one floor to another are known. They consist, for example, of a transport track arranged along the stairs, along which the shopping trolleys are transported, driven by an endless drive chain controlled from both ends of the orbit. The conveyor consists of a slightly downward connecting part, i.e. an entrance end on the lower or upper level, an actual part of the conveyor track passing from one floor to another, rising or falling, and again a slightly downward connecting part for removing wagons from the track on the upper or lower level. The overhangs between the part of the actual transport track and the connecting parts on the lower and upper levels are rounded. Shopping carts, which usually have a pair of swiveling wheels at the front and rear, run on guide rails on the transport track. The guide rails of both pairs of wheels are arranged to be displaced 57383 so that the carriages remain in a substantially horizontal position during transport. In order to guide the wheels of the carriages in the correct position on the guide rails and thus to avoid derailment, it is known to provide a stop at the beginning of the rails on the side of each guide rail, to which the wheel shaft extended for this purpose engages in the wrong wheel position.

Despite all safety measures, such as enclosures, side rails, safety switchgear and warning signs, careless and powerless handling of such transport devices can result in injuries and damage relatively easily.

Known conveying devices have, for example, grippers formed by the chain members of the drive chains, which grip the tracks of the carriage run rods with gripper arms. These grippers are freely available and therefore pose a significant risk. This disadvantage is avoided, for example, by a transport device known from GB patent publication 896 530, in which the grippers attached to the carriages engage the encapsulated transport chain. Here, as in other known conveying devices, the impellers of the carriages are freely adjustable from above on guide rails, which are usually U-profile rails. In this case, however, the carriages can be lifted off the guide rails and grippers by careless or powerless handling during transport, which can also lead to damage to the goods and injuries to persons. The object of the invention is to improve the safety and operational reliability of the above-mentioned transport devices by providing in all respects a Vanna and a safe transport device for goods trolleys.

This object is achieved by the invention in that the guide rails have a box-like profile with four guide surfaces for the forced steering of the carriage impellers. In a practical structural solution, it is most advantageous for the guide profile to have a curvature that engages over the corresponding shaft extension of the impellers.

This guide rail structure according to the invention prevents the basket carriage from derailing if, for example, a person standing on a step leading to the transport direction handles the carriage carelessly or powerlessly.

57383

In the following, the invention will be described in more detail with reference to the accompanying drawings, in which Figure 1 shows an overall view of a transport device for transporting shopping carts upwards.

Figure 2 shows a section of the transport device according to Figure 1.

Figure 3 shows in detail the gripping of the gripping member on the transport chain.

Figure 4 shows the return response.

Figure 5 shows a section of a transport device for transporting carriages downwards.

In Figures 1 to 3, the conveying path of the conveying device is marked with the number 1. The conveying path 1 consists of a conveyor track section 1.1 rising from the floor 2 to the floor 3, an associated connection or entry section 1.2 and a connection or discharge section 1.3 terminating in the floor 3. The number 4 denotes shopping wagons with four pivoting running wheels 4.1, whereby the rear pair of wheels, i.e. on the user side of the carriages 4, has a wider wheelbase than the front pair of wheels. The carriages 4 are conveyed by an endless drive chain 5 controlled from both ends of the conveyor track 1. To drive the drive chain 5 there is a swivel roller 6 with a tensioning device 7 and a drive roller 8 driven by a chain drive 9 13 is marked on the guide roller. The entire drive is enclosed and the lower wall of the housing is marked with reference number 14.

The drive chain 5 assembled from the private chain members 5.1 (Fig. 3) is provided with grippers 15 distributed at regular intervals along its entire length, which are mounted on corner profiles 5.2 attached to the chain members 5.1. The number 15.1 indicates the path of movement of the gripping bolts 15. When transporting the carriage 4, one of the gripping bolts 15 engages the two-arm gripping fork 4.2 attached to the carriage 4. The arm of the fork in the direction of travel of the wagons is marked with the number 4.21 and the arm of the rear with the number 4.22. During the forward movement, the gripping bolt 15 rests on the front arm 4.21 on the gripper fork 4.2. The gripping bolts 15 are made of a sound-absorbing, elastic material and are placed so close to each other that a large number of gripping bolts 15 are available per unit time per possible number of carriages. The drive chain 5 is covered from through the gripping forks 4.2 of the carriage 4 engage the trajectory of the gripping bolts 15 15.1.

Figure 2 further shows the guide rails 18, 19, 20, 21 arranged on the track 1 for the impellers 4.1 of the carriages 4. These are located at the inlet end 1.2 and the outlet end 1.3 in an almost horizontal and adjacent plane. On the inclined transport distance 1.1, the two outer running rails 18, 21 guiding the front pair of wheels are thus displaced relative to the two inner running rails 19, 20 guiding the rear pair of wheels so that the carriages 4 remain in an almost horizontal position throughout the transport distance 1. The wheel axles 4.11 of the impellers 4.1 have an extension 4.12 on the other side. The guide rails 18, 19, 20, 21 have a U-shaped profile, which, however, has a curved curve 18.1, 19.1, 20.1, 21.1 on the other side with a clearance over the wheel axle extension 4.2. At the ends of these curves, strips 22 of sound-absorbing elastic material are inserted. Thus, a forced control of the impellers 4.1 is provided. The space between the guide rails 18, 91 or 20, 21 on the same side is covered with a cladding 23. The extensions 4.12 of the wheel axles 4.11 also prevent the carriages 4 from driving the wheels in the wrong position on the transport device. For this purpose, stops (not shown in the drawings) are arranged in the inlet part 1.2, which are collided with the wheel axle extensions 4.2 in the wrong wheel position.

Arranged in the inlet part 1.2 is a return blocker 24, which prevents the carriage 4 pushed onto the rising transport part 1.1, which is not immediately gripped by the gripping bolt 15, from rolling back to the inlet part 1.2. According to Fig. 4, such a return inhibitor 24 is formed, for example, by a two-arm lever 24.1 pivotally mounted on a guide rail, which is pressed against the stop 24.3 by a tension spring 24.2. As the carriages 4 roll onto the transport part 1.1, the impeller 4.1 turns the lever 24.1 against the spring force. The returning carriage presses the lever 24.1 against the stop 24.3 with its impeller 4.1 and stops.

As can be seen in Fig. 5, the downwardly moving transport device has guide rails 19, 20 for a pair of narrow-track wheels above the guide rails 18, 21 of a pair of wide-track wheels. During the movement, the carriages 4 rest downwards on the rear arm 4.22 of the gripping fork 4.2 on the gripping bolt 15.

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The co-operation of the gripping fork 4.2 and the gripping bolt 15 makes it possible to completely cover the movable drive chain 5 so that there is no part projecting from the housing 16. The impellers 4.1 are guided in a forced manner throughout the transport distance 1.1 so that it is impossible to bounce the carriages 4 off the guide rails 18, 19, 20, 21. This substantially reduces the risk of injury and the risk of damage to the goods due to inadvertent or reckless handling of the transport device and the carriages.

The invention is not limited to the exemplary embodiments shown, but also includes variations within the scope of the following claims. For example, the gripping forks 4.2 or the gripping bolts 15 can be arranged spring-loaded in order to obtain a soft grip of the carriage 4. In a suitable embodiment of the impellers 4.1, the guide rail profile can be formed so as to grip over the entire wheel.