Hammerless solution
The invention relates to a screen, which has a screen panel support and screening modules arranged in the screen panel support. The screening modules are fastened to the screen panel support by means of at least one device. The device comprises a first element attachable to the screen panel support and adapted to receive a opening of the screening module or an opening created by adjacent screening modules, the first element having an outer threading, and a second element having an inner threading for engagement with the outer threading of the first element, such that the screening module is attached to the screen panel support upon interconnection between the first element and the second element. The screen is characterized in that an outer periphery of the second element comprises at least one groove for engagement with a handling tool. The invention also relates to a method for fastening a screening module to a screen panel support.
1. A screen, having a screen panel support and at least one screening module arranged in said screen panel support, wherein said screening module is fastened to said screen panel support by means of at least one device, said device comprising:
a first element attachable to said screen panel support and adapted to be received in an opening of said screening module or an opening created by adjacent screening modules, said opening having a first circumference along one portion of its axial direction and a second circumference along another portion of its axial direction, said second circumference being smaller than said first circumference, said opening extending through said screening module or adjacent screening modules;
a second element for engagement with said first element, such that said screening module is attached to said screen panel support upon interconnection between said first element and said second element,
wherein an outer periphery of said second element comprises a plurality of grooves for engagement with a handling tool.
2. The screen according to claim 1 , wherein said grooves extend in an axial direction and along the entire length of said second element.
3. The screen according to claim 1 , wherein said grooves extend in an axial direction and along a limited portion of the length of said second element.
4. The screen according to claim 3 , wherein said second element is provided with an external thread arranged to engage with the first element.
5. The screen according to claim 1 , wherein said first element is hollow and adapted to receive a bolt for attachment to said screen panel support by means of said bolt and a nut.
6. The screen according to claim 1 , wherein said first element is manufactured by a material chosen from the group consisting of ceramic material, steel, or plastic.
7. The screen according to claim 1 , wherein said second element is manufactured by a thermoplastic material or a polyurethane or combinations thereof.
8. The screen according to claim 1 , wherein said second element comprises a core and an outer shell, wherein the core is relatively softer than the outer shell.
9. The screen according to claim 8 , wherein a threading of said first element is arranged to cut into said core of the second element when said second element is threaded onto the first element.
10. The screen according to claim 1 , wherein said second element is provided with an external thread arranged to engage with the first element.
11. The screen according to claim 1 , wherein said first element and said second element comprises corresponding locking means.
12. The screen according to claim 1 , wherein a circumference surface of adjacent screening modules have shapes which create at least one opening, said at least one opening having a first circumference along one portion of its axial direction and a second circumference along another portion of its axial direction, said second circumference being smaller than said first circumference.
13. The screen according to claim 12 , wherein the portion of said at least one opening with said first circumference is adapted to receive said first element and second element, and the portion of said at least one opening with said second circumference is adapted to receive said first element only.
14. The screen according to claim 12 , wherein an inner periphery of said at least one opening comprises a protrusion for engagement with the outer periphery and/or the bottom portion of said second element.
15. A method for fastening screening modules to a screen panel support, comprising:
attaching a first element to said screen panel support;
placing an opening of a screening module or an opening created by adjacent screening modules around said first element, said opening having a first circumference along one portion and a second circumference along another portion of its axial direction, said opening extending through said screening module or adjacent screening modules; and
engaging a second element with said first element by engaging a handling tool with at least one groove provided on an outer periphery of said second element, and creating a screwing motion of said second element, wherein said second element having a larger outer circumference than said second circumference of said opening, thereby attaching said screening module or screening modules to said screen panel support.