MONOGUIDE MANUAL CUTTER
A monoguide manual cutter is provided, which can comprise a base, a guide arranged longitudinally above the base, a carriage that can be moved along said guide and a tool holder mounted on the carriage and having a handle, a roller for marking a cutting line on the ceramic part and a blank holder for breaking said ceramic part along the cutting line. The aluminium extrusion guide comprises a cross-section with a narrow lower portion and a wider upper portion comprising longitudinal tracks for supporting and linearly moving rolling means of the carriage. The configuration of the guide can make it easier for the operator to view the roller while using the cutter.
1 . A monoguide manual cutter, comprising:
a base for supporting a ceramic part to be cut;
a guide arranged longitudinally above the base;
a carriage configured to be moved along said guide and a tool holder mounted on the carriage able to rotate with respect to an axis perpendicular to the guide and having a drive handle;
a roller for marking a cutting line on the ceramic part and a blank holder for breaking said ceramic part along the cutting line;
wherein the guide is an aluminium extrusion guide having a cross-section with a narrow lower portion and a wider upper portion; and
wherein the wider upper portion comprises longitudinal tracks configured to support a linear roller of the carriage.
2 . The monoguide manual cutter of claim 1 , wherein the guide has a cross-section with a general T-shaped configuration, with two lateral wings at the wider upper portion.
3 . The monoguide manual cutter of claim 2 , wherein the longitudinal tracks of the guide comprise two steel rails inserted under the two lateral wings of said guide and two respective oblique planes defined at an upper end of the guide and laterally inclined in opposite directions.
4 . The monoguide manual cutter of claim 3 , wherein the linear roller of the carriage comprises:
rail bearings facing the steel rails of the guide; and
self-adjusting bearings provided with a plastic outer sleeve and facing the oblique planes of the guide.
5 . The monoguide manual cutter of claim 4 , wherein the self-adjusting bearings are mounted on respective rocker arms provided with an elastic element for self-adjusting force applied on the oblique planes of the guide and for absorbing irregularities of the oblique planes of the guide.
6 . The monoguide manual cutter of claim 1 , wherein the carriage, made of cast aluminium, comprises an inverted U-shaped cross-section, with two lateral wings, which is open inferiorly, and arranged on the guide.
7 . The monoguide manual cutter of claim 6 , wherein the carriage comprises an upper protective cover made of aluminium.
8 . The monoguide manual cutter of claim 1 , wherein the tool holder, made of cast aluminium, has an annular cross-section arranged around the carriage and the guide.
9 . The monoguide manual cutter of claim 1 , wherein the axis of rotation of the tool holder comprises two independent semi-axes of rotation mounted on lateral wings of the carriage, perpendicular to the guide and arranged in a horizontal plane located between upper and lower ends of said guide.
10 . The monoguide manual cutter of claim 1 , wherein the tool holder laterally comprises at its lower end two extensions oriented towards a rear area of the cutter and ending in a rear end carrying the axis of rotation of the roller and spaced from the axis of rotation of the tool holder.
11 . The monoguide manual cutter of claim 10 , wherein the axis of rotation of the blank holder is arranged between the axis of rotation of the roller and the axis of rotation of the tool holder, and that in an operative position of the blank holder said axis of rotation is arranged close to a vertical plane coinciding with the axis of rotation of the tool holder.