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Safety structure for protecting a railway line includes a fencing on supports resting on the track bed. These supports are connected to a rail of a railway line. The connection is effected by magnetic force. At their free ends, the supports have permanent magnets having a shape allowing them to enga

Safety structure for protecting a railway line includes a fencing on supports resting on the track bed. These supports are connected to a rail of a railway line. The connection is effected by magnetic force. At their free ends, the supports have permanent magnets having a shape allowing them to engage the web of a rail. Due to the significant length of the supports, it is possible to apply a great torque to the magnets when the other end is engaged, that is to say that end which is turned away from the permanent magnets, as a result of which the magnet slides away along the web and can be detached therefrom. The magnet may consist of a number of magnets stacked on top of one another. The magnet is preferably arranged so as to be slightly displaceable with respect to the support to provide compensation for an uneven surface.

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1. A safety structure for shielding a construction of a railway track constructed on a bed and consisting of sleepers and spaced-apart rails, in which each rail of the spaced-apart rails comprises a head, web and foot, the safety structure comprising: a fencing which is upright in a position of use;

1. A safety structure for shielding a construction of a railway track constructed on a bed and consisting of sleepers and spaced-apart rails, in which each rail of the spaced-apart rails comprises a head, web and foot, the safety structure comprising: a fencing which is upright in a position of use; andsupports of the fencing which are horizontal in the position of use, which said supports are adapted to be connected to one of the spaced-apart rails of the construction by one end, said one end comprising a permanent magnet with a free surface for contacting said one rail, said end further comprising a head end part having said magnet, said head end part being embodied to contact a web part of said one rail, a contact surface of said end part comprising the free surface of said magnet, said magnet being provided for absorbing tensile forces exerted in a direction at right angles to said contact surface. 2. The safety structure according to claim 1, wherein said magnet is hingedly connected to a support of said supports. 3. The safety structure according to claim 2, wherein said magnet comprises a number of magnet sections which are situated above one another in the position of use. 4. The safety structure according to claim 1, wherein said magnet comprises a number of magnet sections which are situated above one another in the position of use. 5. The safety structure according to claim 4, wherein said magnet sections are adapted to displace with respect to said support. 6. The safety structure according to claim 5, wherein metal-filled plastic parts are present between said magnet sections. 7. The safety structure according to claim 5, wherein one of the magnet sections is provided with an opening, through which a pin extends, having a substantially smaller diameter than the diameter of said opening is adapted to displace said one of the magnet sections. 8. The safety structure according to claim 5, wherein said magnet sections are adapted to displace with respect to one another in the longitudinal direction of said support. 9. The safety structure according to claim 8, wherein metal-filled plastic parts are present between said magnet sections. 10. The safety structure according to claim 8, wherein one of the magnet sections is provided with an opening, through which a pin extends, having a substantially smaller diameter than the diameter of said opening is adapted to displace said one of the magnet sections. 11. The safety structure according to claim 4, wherein metal-filled plastic parts are present between said magnet sections. 12. The safety structure according to claim 11, wherein one of the magnet sections is provided with an opening, through which a pin extends, having a substantially smaller diameter than the diameter of said opening is adapted to displace said one of the magnet sections. 13. The safety structure according to claim 4, wherein one of the magnet sections is provided with an opening, through which a pin extends, having a substantially smaller diameter than the diameter of said opening is adapted to displace said magnet section. 14. The safety structure according to claim 4, wherein a front surface of said magnet sections corresponds to the shape of the web of said one rail. 15. The safety structure according to claim 1, wherein said magnet is accommodated in a fork part, in which the stem of said fork part is hingedly connected to said support. 16. The safety structure according to claim 1, wherein a support of said supports is attached to said fencing by means of a lockable hinge. 17. The safety structure according to claim 1, wherein said contact surface is at least 5 cm high and 10 cm long. 18. The safety structure according to claim 1, wherein a support of said supports is adapted to be supported on a railway sleeper of the railway track. 19. A method for removing a safety structure for shielding a construction of a railway track constructed on a bed and consisting of sleepers and spaced-apart rails, in which each rail of the rails comprises a head, web and foot, comprising: providing said safety structure comprising a fencing which is upright in a position of use and provided with supports which are horizontal in the position of use, said supports being connectable to one of the spaced-apart rails by one end, said end of said supports comprising a head end part with a permanent magnet;contacting a free contact surface of the permanent magnet with a web of said one rail;lifting an end of a support of said supports near the fencing; andpushing the magnet downwards along the web of said one rail to be detached from said web. 20. A construction provided with a safety structure, the construction of a railway track constructed on a bed and consisting of sleepers and spaced-apart rails, in which each rail of the rails comprises a head, web and foot, wherein the safety structure comprises a fencing which is upright in a position of use and provided with supports which are horizontal in the position of use, which said supports are adapted to connect to one of said spaced-apart rails by one end, said end of a support of said supports comprising a permanent magnet, a free contact surface which is in contact with the web of said one rail. 21. A railway provided with a safety structure, comprising: a railway track constructed on a bed and comprising sleepers and spaced-apart rails, in which each rail of the rails comprises a head, a web and a foot, wherein the safety structure comprises a fencing which is upright in a position of use and provided with supports, each support being horizontal in the position of use, each support being adapted to connect to one of said spaced-apart rails by one end, said end of each said supports comprising a permanent magnet, and a free contact surface which is in contact with the web of said one rail.