Laying nest provided with an improved ejection system
A laying nest provided with an ejection system with a particularly simple structure and operation comprises a nest floor that can rotate in two opposite directions, to get more inclined towards a collection area or towards a coop arranged on the nest side opposite to the collection area. The floor is rotatable about a pair of pivot pins arranged aligned to each other and adjacent to the coop, and each of the pivot pins is mounted slidably in a respective slot. The rotation to incline the floor towards the collection area is thus obtained by translating the pivot pins along the respective slots. The driving arrangement of the ejection system comprises traction cables guided along return pulleys arranged above the floor, whereby the ejection system has a limited footprint and is not prone to jams and malfunctions due to droppings and dirt.
1 . A laying nest, comprising: a floor and side walls, including a first side wall comprising an entry opening, a second side wall, opposite to the first side wall and comprising a discharge opening, a third side wall and a fourth side wall that are opposite to each other and extend between the first and second side walls, wherein the floor has at least a side adjacent to the first side wall and a side adjacent to the second wall, wherein the floor is arranged rotatable about a first rotation axis parallel to the first side wall and adjacent thereto, as well as about a second rotation axis arranged parallel to the second side wall and adjacent thereto, wherein the floor is mounted to a pair of pivot pins arranged aligned along the first rotation axis, and wherein the pivot pins are mounted slidably in slots provided in the third wall and the fourth wall, respectively, and extending in a vertical direction, wherein the rotation of the floor about the second rotation axis is obtained by translation of the pivot pins along the slots, wherein the laying nest comprises a driving arrangement to rotate the floor about the pivot pins, wherein the driving arrangement comprises a pair of traction cables arranged at the third side wall and the fourth side wall of the nest, respectively, wherein a first end of each of the traction cables is secured to the floor at the side of the floor facing the second side wall, and wherein the opposite end of each of the traction cables is secured to a respective traction device actuatable for tensioning or releasing the traction cables.
2 . The laying nest of claim 1 , wherein the driving arrangement comprises return pulleys at the third side wall and the fourth side wall of the nest, respectively, and wherein each of the traction cables follows a path determined by the sequence of the return pulleys.
3 . The laying nest of claim 2 , wherein the return pulleys are arranged above the floor.
4 . The laying nest of claim 1 , wherein the driving arrangement, besides controlling rotation of the floor about the pivot pins, controls translation of the pivot pins along the slots.
5 . The laying nest of claim 2 , wherein the driving arrangement, besides controlling rotation of the floor about the pivot pins, controls translation of the pivot pins along the slots, and wherein the driving arrangement comprises, for each of the traction cables, a movable pulley connected to the respective pivot pin.
6 . The laying nest of claim 5 , wherein, for each of the traction cables, the movable pulley is arranged adjacent to the first side wall and above the respective pivot pin.
7 . The laying nest of claim 5 , wherein each movable pulley is connected to the respective pivot pin by means of cords.
8 . The laying nest of claim 5 , wherein each movable pulley is connected to the respective pivot pin by means of a rigid plate.
9 . The laying nest of claim 6 , wherein each movable pulley is connected to the respective pivot pin by means of cords.
10 . The laying nest of claim 6 , wherein each movable pulley is connected to the respective pivot pin by means of a rigid plate.
11 . The laying nest of claim 1 , wherein the traction devices are winches.
12 . The laying nest of claim 1 , wherein each of the pivot pins is integral with a corresponding plate which has a wall contacting and abutting the lower face of the floor.
13 . The laying nest of claim 1 , wherein the floor rotates by an angle between 5° and 20° about the second rotation axis when the pivot pins translate from the lower ends of the slots to the upper ends of the slots, or vice versa.
14 . The laying nest of claim 1 , wherein the second side wall has a curved profile substantially coinciding with a circumference arc drawn on the side of the floor adjacent to the second side wall during rotation of the floor about the first rotation axis.