Patent GB-457409-A (GB)
Title: A machine for transporting soil, sand or the like and for smoothing and levelling ground
IPC: E02F3/64
Filed: 1935-09-19
Abstract: 457,409. Transporting soil &c. and levelling ground. LAFITA, T., Rivas, Egea de los Caballeros, Zaragoza, Spain. Sept. 19, 1935, No. 26013. Convention date, Oct. 25, 1934. [Class 68 (i)] [See also Groups X and XXX] In a machine for transporting soil &c. and for levelling ground and having a soil box open at its front and top and rotatably mounted in a frame eccentrically relatively to a pair of supporting wheels the soil box being displaceable by rotation between a loading position in which it rests on the ground, and transport and unloading positions in which it is supported by the wheels, the axes of the soil box and wheels are rotatable one about the other so that the various adjustments of the soil box can be effected by gravity and forward traction. A frame 1 has a steering wheel 3, and rear wheels 2 carried by arms 7 pivoted to axles 6 about which the soil box 5, open at top and front, also pivots; arms 7 are fixed to spiked spirals 8. In a control box 14 in front of the machine are outer slides 15, 17, Figs. 8 and 9, controlled by levers 10, 12, through rods 19, 34, and a catch 22 controlled bv lever 11 through cable 36, which lever also through cable 33 controls catch 23 in slide 17 ; the slide 15 has an abutment 20 engaging a longitudinal slot 21 in a central slide 16. Slide 16 is connected through rod 24, arms 25, 27, pivoted at 26, and link 28, to bell-crank 29 pivoted at 30 and carrying a roller 31 adapted to engage one of the concave faces of a polygonal roller 32 on the box 5 to vary the digging &c. angle of the box 5 ; a finger 55 is fixed to the pivot 30. A lid 41, pivoted at 42 in slides 43 running on rails 44, is adapted to close the front of the soil box 5 when in transport position; the pivot 42 has arms carrying rollers 46 engaging inclined guides 47 whereby as the slides advance or recede, the lid rises or falls. The lid has side walls 37 movable laterally about loose pivots 49 ; when the lid is closed, arms 38 on the side walls ride over projections 39 on the box 5 and apply angle members 40 below the box, while when the lid moves away from the box, members on the side walls engage members 73 on the frame 1 to spread the side walls against spring resistance so as to clear the frame 1. The slides 43 are moved through links 60 connected through links 63, 66, 67, to arms 68 with fingers 70, the arms 68 being secured to shafts 69 carrying fingers 71. When loading, the soil box 5 is on the ground and the arms 7 with wheels 2 are raised, abutments 50 holding the latter. After loading, the abutments 50 are released by lever 11 acting through cables 35, and the arms 7 fall, aided by a spring, spiked members 8 engage the ground, and traction of the machine raises the frame 1 and soil box 5 and brings the wheels 2 in contact with the ground, arms 7 then engaging spring-pressed abutments 51. During this movement, an abutment 52 on the arms 7 contacts finger 55 and acts through bell-cranks 29 and rollers 31 to tilt the soil box into transport position, the bellcrank 29 also acting through linkage 28, 27, 25, 24 to move slide 16 forward to engage abutment 22, Fig. 9, a catch 57, Fig. 8, also engaging the slide 16 whereby the rollers 31 are held in raised position. Also during this movement, rollers 53, on members' offset from the arms 7, contact the fingers 71 and act through links 68, 67, 66, 63, 60, to apply the lid to the soil box. Spring-pressed abutments 58 limit rearward tilting of the soil box. For unloading, lever 11, through cable 36, frees the abutment 22 and the load pushes the rollers 31 clear of the polygonal abutment 32 for engagement with a spiral runway 74 on the soil box ; as the soil box tilts, it displaces the lid and this runway acts through rollers 31 to push the slide 16 into engagement with catch 23 in slide 17, the position of the latter, controlled by lever 12, limiting the tilt of the soil box. On releasing catch 23 by means of lever 11 and cable 33, the soil box completes its rotation as the machine advances and assumes the loading position, while a roller thereon contacts finger 70 to return the lid to the position of Fig. 3 ; further through fixed abutments 77 and spring pressed abutments 76, abutments 78 on the arms 7 are engaged and the arms and wheels 2 raised to the position shown in Fig. 3.