SE464760B - SAFETY DEVICE MUST STOP MOVING WITH A LIFT TABLE, AN ELEVATOR, INDUSTRIAL PORT OR LIKE - Google Patents

Description

'io 15 20 25 30 '35 464 760 2 operated scissor lift table. Fig. 1 shows in a plan view such a lifting table from the side. Figures 2a and 2b show in a cross section construction and function of the security frame and Fig. 3 shows in a perspective view in waist a preferred embodiment of a safety frame.

The scissor lift table in Fig. 1 has generally seen a conventional construction and comprises a frame-shaped lower part 1, two pairs of scissor-shaped lifting members arms 2, of which only one pair is visible in the figure, a platform 3 and a hydraulically acting cylinder-piston assembly 4._ The lifting arms 2 with 5 designated ends are rotatably fixed to the lower part 1 resp platform 3 and the two remaining ends are preferably equipped with rollers and slidably arranged along the lower part 1 and slide 3 arranged on the platform, not visible in the drawing. Increase of the platform 3 takes place by means of the cylinder-piston assembly 4 which acts between two legs of the lifting arms. The lowering of the platform can be done by its own weight or by reversal.

In order to prevent squeezing accidents during the lowering movement, mens 3 edge arranged a so-called safety frame 6, which is suspended on a in such a way that it can be displaced by a relatively small force direction of the platform. Via breaking means whose function is to be in more detail in connection with Fig. 2 and which are affected by sliding of the safety frame 6, the lowering movement is stopped.

With reference to Figures 2a, 2b and 3, the structure and function of a safety frame according to the invention is explained more in detail. The 6 sides of the safety frame are made of a profile strip, which according to the invention has a longitudinal flange 7 and the sides are in joined together with special corner details 8. The frame is in the corners slidably suspended in special corner brackets 9 and, if required with considering the lengths of the sides, there are also brackets 10 at the sides of the frame.

The flange 7 forms an acute angle α with the displacement of the safety frame 6. direction, which in Fig. 2a is marked with a dashed line 11 and is so mounted relative to the edge 12 of the platform 3 that the free edge of the flange 7 line is in the same plane as the platform edge 12. Profile list cross-sectional shape preferably resembles an upside-down side view 10 15 Azo 3 464 760 considered chair. The chair's outwardly sloping backrest consists of the flange 7 and its legs and seat of a preferably rectangular U-profile, the mutually parallel and spaced apart flanges are designated 13 and 14, see Fig. 2.

According to the invention, the previously mentioned switch means 15, which actuate at the displacement of the safety frame and wiring 16 for connection of these placed in the U-profile between the flanges 13, 14. the frame is at least partially enclosed by the inner wall 17 and a Z-profile 18 cooperating with it, so that the switch means 15 and the lines 16 are completely protected against impact.

The safety framework according to the invention works in the following way, see Figures 2a and 2b and Figure 1 where a dashed line is shown the position of the lifting table in the situations shown in Fig. 2. An object 19 is assumed to have happened to be in such a position that it can be squeezed between the platform 3 and the floor in figures 2a, 2b denoted by 20. In fig 2a has the profile strip flange 7 through the lowering movement of the platform 3 just come into contact with the object 19. When the platform 3 is lowered more, still with a good safety margin for damage to objects 19, the safety frame 6 is displaced upwards, one or more of which the switch means 15 are brought into contact with the Z-profile 18 and the movement stopped.

Claims (1)

464 760 4 Patent claims Safety device with the task of stopping the movement of a lifting table, an elevator, industrial door or similar moving object (3) when an object (19) has entered between the moving object (3) and a stationary object (1) , comprising a profile strip slidably mounted in the direction of movement of the moving object (3) and at an edge (12) thereof, which is arranged so that when it is displaced under the action of the object (19) in the direction of the moving object (3), switching means (15) via which the movement is stopped, the profile strip having a longitudinal flange (7), which in a cross-section forms an acute angle with the direction of displacement, characterized in that the cross section of the profile strip has the shape of a side view chair, with an outwardly sloping backrest formed by said flange (7) and whose legs and seat are formed by a preferably rectangular H-profile, that the profile strip is mounted relative to the edge (12) of the movable object (3) that the flange (7) free can line is in the same plane as said edge (12) and that said switch means (15) and required wires (16) are placed in the U-profile and that this is partly enclosed by a second slightly larger U-profile or by an inner wall (17 ) of the movable object and one with such a Z-profile (18) that the wall (17) and the Z-profile (18) together form the larger U-profile whereby said switch means (15) and wires (16) are completely protected against injury and so that no object can be inserted between the clamping strip (6) and the moving object (3). w