DE1921854A1 - Lifting platform with loading flap - Google Patents

Description

AB HYDRAULMEKAHQ _t ' ...... _: ;. . .

Drottninggatan 25, 602 24 NQERKÖPING ,

(Sweden) <*:

LIFT WITH LOADING DOOR

The invention relates to a lifting platform by means of which e.g. Containers are loaded onto or unloaded from vehicles and the like and the one with a swivel, a bridge between the lift and the loading flap forming the vehicle is equipped. In the case of the previously known lifting platforms of the specified type, the operator must use the Fine-adjust the height of the lift, taking into account various factors, such as the suspension of the vehicle, so that the loading flap can be adjusted A horizontal bridge between the lifting platform and the loading area of the vehicle was formed by this fine adjustment Complication is eliminated by the lifting platform according to the invention, which is characterized in that the loading flap with operating elements, interacts to raise and lower the lift, so that § the loading flap automatically when interacting with the vehicle occupies a predetermined, expediently horizontal position in relation to the lifting platform. So the lift adapts itself the height of the vehicle and when this height is changed, the lift automatically adjusts to the relevant height.

The invention is explained in more detail below with reference to the drawing

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described that a chosen as an example AusfuhrungsforuiTdfer ⁹ - ¹ represents the lift. '· - ·' - ■ "■ ^{: j :;}

It shows: "'-" ■■■:

Fig. 1 is a side view of the lifting platform, ■ "- ■ ^'-: - ^{^^.} ·· Figure 2 in Größ he em scale an actuating rod;, -" · Figure 3 is a hydraulic Schaltsehema for the lifting platform, and "■. ■ · ■ "- * ^::; "'» ^; "' ^: -

Fig. 4 is an electrical circuit diagram of the automatically regulated Loading flap. ''

1 designates the lifting platform, which cooperates with a power cylinder Cl for its lifting and lowering. The lifting platform 1 has a loading flap 2 pivoted on it, which is intended to form a bridge between the lifting platform 1 and the vehicle 3. The vehicle is indicated in the form of a loading area. The loading flap 2 is hydraulically actuated and thus interacts for its pivoting with a power cylinder C2, which is pivotably attached between the loading flap 2 and the lifting platform 1. '' · ' ^z ''^{:; r} - '- ■ - "As from the hydraulic circuit diagram in Fig ^^^^ r ^ siich ^ ir ^ borrowed, the device has a single pressure medium source,""aVfi". the pump 4, ". This is connected to the power cylinder 'Cl for raising and lowering the lifting platform 1 and to the power cylinder C2 for pivoting the loading flap 2 via the valves Vl and V2 ari. "'When' the lifting platform 1 receives an impulse to move upwards, the pump 4 starts, the 'valve V2 is opened, the loading flap' 2 is swiveled up and the lifting platform is raised for a long time closed, the lifting platform 1 stops and the loading flap 2 assumes its free position. When the lifting platform 1 receives an impulse to move downwards, the valve V2 is opened, the loading flap 2 is swiveled up, the valve V1. opened and the lift 1 lowered

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both valves V1 and V2 closed / with the lift standing remains and the loading flap 2 assumes its free position.

According to the invention, the loading flap 2 acts with operating members to raise and lower the lift 1 together, so that the loading flap 2 interacts with the loading area of the vehicle 3 automatically a horizontal position in relation to the lift '

1 occupies. The lifting platform 1 thus has two limit position switches GL2 and GL3 which can be actuated by the loading flap 2, of which the limit position switch GL3 is operated to raise the lifting platform 1 when the loading flap 2 is pivoted up, and the limit switch GL2 is operated to lower the lift 1 when the loading flap 2 is pivoted down will.

Another limit switch GL ¹ I is from the loading flap

2 can be actuated in a certain angular range of the same. In this Angle range, the flap switches the two to automatic lifting and lowering of the lifting platform 1 provided limit switches GL2 and GL3. The automatic height adjustment is therefore only in the angular range switched on, which is determined by the limit switch GL4 will.

The lift is also with one of the loading flap 2 actuatable limit switch GLl, which prevents lowering of the lifting platform! Before the loading flap 2 is swiveled up completely is. When the lift 1 receives an impulse to move downwards, the limit switch GLl should therefore be actuated before the Valve Vl for lowering the lift 1 is opened.

5 denotes a rod parallel to that between the Loading flap 2 and the lift 1 pivotally attached power cylinder C2 is arranged. The rod 5 is thus similar to the power cylinder attached between points A and B. The rod 5 has four projections 6-9, which the four limit position switches GLl, GL2,

903848/061 6

BATH

Press "-ÖL-3 and GL4. The projections 6-9 consist of rings, their Position is adjustable. The position of the loading flap 2 in relation to the upper part of the lifting platform 1 is determined by the rings 7 and 8. The distance between the rings 7 and 8 is decisive for the tolerances of the flap position.

The lifting platform 1 is provided on the upper part with a mechanically operated protective flap 10, which is opposite the loading flap 2 is arranged.

11 denotes a safety frame which cooperates with the switch SR.

Changes are within the scope of the following claims possible.

COPY BAD ORIGINAL

90934 8/0616

Claims (6)

PATENT CLAIMS 1. A lift of the type used for loading and unloading vehicles and the like and which has a pivoting bridge is equipped between the lifting platform and the vehicle forming loading flap, characterized in that the loading flap (2) with operating members (GL2, GL3) to raise and lower the lifting platform (1) cooperates, so that the loading flap (2) when interacting with the vehicle (3) automatically assumes a predetermined, expediently horizontal position with respect to the lifting platform (1). 2. Lifting platform according to claim 1, characterized in that it has two limit switches (GL2, GL3), one of which (GL3) is operated to lift the lifting platform (1) when the loading flap (2) is swiveled up, and the other (GL2) is operated to lower the lifting platform (1) when the loading flap (2) is swiveled down. 3. Lifting platform according to claim 2, characterized by a Another limit switch (GL4), which can be actuated by the loading flap (2) in a certain angular range of the same and which is shown in its actuated position the two limit switches (GL2, GL3) provided for the automatic lifting and lowering of the lifting platform (1) turns on. 4. Lifting platform according to claim 2 or 3, characterized by a further limit switch which can be actuated by the loading flap (2) (GLl), which prevents the lifting platform (1) from lowering before the loading flap (2) is fully swung up. 5. Lifting platform according to one of claims 2- · 4, characterized. draws that the loading flap (2) for pivoting with a power cylinder (C2) or the like. cooperates, which is pivotally mounted between the loading flap (2) and the lifting platform (1), and that a. Rod (5) is arranged parallel to the power cylinder (Q2) and with COPY ς / 1321854 Before jumps (6-9) is provided, the position of which is expediently adjustable and which the limit position switches (GLl ₅ GLS, GL3, GL ¹ I) are to operate. ~ ' 6. Lifting platform according to claim 5, characterized "by a only pressure medium source (4), the power cylinder (£ .2) for pivoting the loading flap (2) and at least one power cylinder (Cl) for raising and lowering the lifting platform (1) is common. '-. .. COPY