FI64337B - LYFTANORDNING FOER LYFTANDE AV EN AV TVAO HUVUDSAKLIGEN CYLINDRISKA FOEREMAOL AV UNGEFAER SAMMA STORLEK OCH TYNGD BILDAD LAST I STAOENDE LAEGE - Google Patents

Description

64337

This invention relates to a lifting device for lifting a load of two substantially cylindrical objects of approximately the same size and weight in a vertical position and comprising two lifting heads two lifting loops connecting the loops, extending above the load on the lifting hook. The invention is particularly suitable for lifting paper rolls.

A lifting device for the same task is already known, which is presented in Finnish patent application FI-811620. The known lifting device comprises two lifting belts formed in loops at their ends, arranged on opposite sides around two rolls of paper to be lifted, and two endless lifting loops, each connected to its own lifting belt and passed through the loops of the other lifting belt to extend above the load for attachment to the lifting hook.

Fitted around the paper rolls, the known lifting device works excellently. It is safe to use and will not damage the rolls of paper or their wrapping paper. It speeds up loading and unloading and makes unloading quick.

The disadvantages of this known lifting device are its cumbersome manufacture due to the thick strips which are difficult to sew together in the machine and the somewhat awkward fitting around the rollers.

The object of the present invention is thus to eliminate these drawbacks and this has been achieved by arranging the lifting device in such a way that the lifting loop or lifting loops are threaded through all four lifting belt loops extending from one loop to another in the area between the objects to be lifted.

The manufacture of the lifting device according to the invention is very simple because the lifting loop is simply threaded through the loops of the lifting belts, after which the ends of the lifting loop are connected so as to form an endless loop.

Adjusting the lifting device around the load is also easy because the structure is clear and the loops are easy to grip for tightening and hooking.

Synthetic textile tape is used as the lifting belt. In order to increase the friction of the lifting straps, they are preferably coated with natural rubber, which is the best material for this purpose, especially in view of the varying weather conditions. As thin a material as possible is preferably used as the lifting loop and the connecting loop, so that no depressions are formed on the surfaces of the objects to be lifted.

The invention is described below with reference to the accompanying drawings, in which:

Figure 1 shows a vertical view of two rolls of paper hanging on a hook on a lifting device according to the invention. The embodiment shown in Fig. 1 corresponds to the embodiment shown in Fig. 5. When shown in a vertical view, it also corresponds to the embodiment of Fig. 10, in which, however, two lifting loops 5 are used. This embodiment will be explained in more detail in connection with Fig. 5.

Figure 2 schematically shows two rolls of paper with a lifting device seen from above. The embodiment according to Fig. 2 is the same as the embodiment schematically shown in Fig. 4 and will be explained in more detail in connection with this figure.

3,64337

In the embodiments of Figures 3 to 6, X-shaped threading is used, with the loop portions connecting the cross members in Figures 3 and 4 being parallel to the longitudinal direction of the load and the corresponding loop portions in Figures 5 and 6 being transverse to the longitudinal direction of the load. In Figures 3 and 5, the crossing hook members are inserted into the hook 2, while in Figures 4 and 6, the straight loop members form the hook hooks inserted into the hook. In Fig. 5a, the straight loop parts are shown as strips following the roller surfaces 1 and fastened to each other by a stitch 8. The function of the stitch 8 is mainly to facilitate the fitting of the lifting device to the rollers.

In the embodiments of Figures 7 and 8, a rectangular thread is used, the lifting loop 5 being threaded clockwise or counterclockwise in succession through all the loops 4. In Figs. 7 and 7a, the loop portions transverse to the longitudinal direction of the load are formed as hook loops, and in Fig. 8, the loop portions parallel to the longitudinal direction of the load are formed on the hook as hook loops. In the embodiment according to Fig. 7a, a connecting loop 7 is added to the lifting device, which is threaded around the loop parts parallel to the longitudinal direction of the load. The length of the connecting loop is approximately the same as the radius of the rollers. The purpose of the connecting loop 7 is to press the ends of the lifting belts against the roller surfaces immediately at the initial stage of lifting, which increases the friction surface between the lifting belts and the roller surfaces and thus reduces the sliding of the lifting belts upwards along the rollers. The embodiments according to Figures 7 and 8 are quite simple and easy to adapt.

In the embodiments of Figures 9-11, two lifting loops 5 are used, which in Figures 9 and 10 are threaded like a rectangle and in Figure 11 in an X-shape. In Figure 9, each loop is threaded through two loops opposite in the longitudinal direction of the load. Part of each lifting loop forms a separate hook loop to be attached to the lifting hook. Fig. 4 64337 sa 9a is a start-up loop 7 threaded around one loop part of the lifting loops, the function of which is the same as that shown in connection with Example 7a. In Fig. 10, each loop is threaded through two loops in the transverse direction of the load, i.e. the same lifting belt. A portion of each loop is inserted into a hook loop 2. On Figure 10a, the loop portions following the roller surfaces are shown as curved strips, as they actually are, and attached to each other by a stitch 8, as in Figure 5a. The purpose of the suture is the same as shown in connection with Figure 5a. In Fig. 11, each lifting loop is threaded through two mutually perpendicular loops. Each lifting loop forms a separate hook loop to be attached to the lifting hook 2.

The embodiments according to Figures 9-11 operate in essentially the same way as the correspondingly threaded lifting devices with one lifting loop. Threading the hoist onto paper rolls may be a little trickier because there are more loops in the hoist. In order to facilitate the application, it is advantageous to connect the hook loop parts to each other, for example with a leather cover.

The safe operation of the lifting device is based on the friction between the lifting belts and the paper rolls. In the lifting device according to the invention, the lifting loops provide such pulling forces to the lifting belts which press the lifting belts against almost all or the entire length of the roller surfaces, whereby the friction surface is optimal. This fact and the friction-increasing substance used to cover the belts guarantee the required safe operation.

As an example of the dimensioning of the lifting device according to the invention for rollers of 80-100 cm, the length of each lifting belt 3 can be stated to be 210 cm and the length of each lifting loop 5 to be about 490 cm.

li 64337

The lifting device can be made continuous or disposable. The safety factor of a lifting device in continuous use should be about 5-7 times and that of a single-use lifting device about 3.5 times.

Claims (13)

A lifting device for lifting a load consisting of two substantially cylindrical articles (1) of approximately the same size and weight in the upright position, comprising two lifting belts (3) arranged at their ends to loops (3) arranged on the sides of the load and a or two lifting loops (5), son joining the loops (4) and extending above the load to the lifting hook (2), characterized in that the lifting loop or lifting loops (5) are threaded through all four lifting loops (4) and extend from one loop to another in the area between the objects (1) to be lifted. Lifting device according to claim 1, provided with a lifting loop (5) characterized in that the lifting loop is threaded X-shaped through the loops (4) of the lifting harnesses (3), so that the straight parts joining the lifting cross are parallel to the longitudinal direction of the fastener and said loop parts are arranged in the lifting hook (2) or the like. Lifting device according to claim 1, provided with a lifting loop (5), characterized in that the lifting loop is threaded X-shaped through the loops (4) of the lifting harnesses (3), so that the straight parts joining the lifting cross are parallel to the longitudinal direction of the load. each 'other intersecting loop parts are arranged in the lifting hook' (2) or the like. Lifting device according to claim 1, provided with a lifting loop (5) »characterized in that the lifting loop is threaded X-shaped through the loops (4) of the lifting harnesses (3) so that the straight parts joining the lifting cross are parallel to the transverse direction of the load and said loop parts are provided in the lifting hook (2) or the like. Lifting device according to claim 1, provided with a lifting loop (5) »characterized in that the lifting loop is X-shaped threaded through the lugs (3) Loops (4) such that the straight parts joining the lifting loop cross are parallel to the transverse direction of the load and that the intersecting parts of the lifting cross are arranged in the lifting hook (2) or the like. Lifting device according to claim 1, provided with a lifting loop (5), characterized in that the lifting loop is rectangularly threaded through the loops (4) of the lifting belts (3) and that the parallel loop portions with the longitudinal direction of the load are arranged in the lifting hook (3) or the like. . Lifting device according to claim 1, provided with a lifting loop, characterized in that the lifting loop is rectangularly threaded through the eyelet (4) of the lifting harnesses (3) and that the loop parts parallel to the load direction are arranged in the lifting hook (2) or the like. Lifting device according to claim 1, provided with two lifting loops (5), characterized in that each lifting loop is threaded through two loops (4) belonging to different lifting belts (3), parallel to the longitudinal direction of the load and that one is led from each lifting loop. lifting member to the lifting hook (2) or the like. Lifting device according to claim 1, provided with two lifting loops (5), characterized in that each lifting loop is threaded through two opposite loops (4) of the same lifting harness, parallel to the transverse direction of the load and that from each lifting loop a lifting part is led to the lifting part. (2) or the like. Lifting device according to claim 1, provided with two lifting loops (5) »characterized in that each lifting loop is threaded through two diagonally opposite loops (4) thereby forming a double lifting loop cross and leading from each lifting loop to each lifting slider (2). ) or similar.