ADJUSTMENT DEVICE FOR MACHINES FOR CUTTING FLOOR TILES AND SIMILAR

Abstract

The invention relates to an adjustment device for machines for cutting floor tiles and similar, which is provided with a base (1) and an arm (2) carrying a head with a cutting disc (5), and which comprises an adjustment bolt (3) rotatably mounted on the base and provided with a cam (33) that acts against the inner contour of a square hole (21), the cam (33) having a profile suitable to cause, by means of the rotation of the adjustment bolt (3), the arm (2) to move along a square path (T) and the cutting disc (5) to be adjusted in two directions (x, y), parallel and perpendicular to the longitudinal direction (x) of the base.

Claims

1. An adjustment device for machines for cutting floor tiles and similar, applicable to electrical cutting machines provided with a base (1) on which the floor tiles to be cut move in a longitudinal direction and an arm (2) carrying a head with a cutting disc (5) driven by an electric motor; said centering device comprising: an adjustment bolt (3) having: a cylindrical lower section (31) rotatably mounted in a hole (11) in the base with respect to a first axis (z) perpendicular to the base; a cam (33) defined in an intermediate area of the adjustment bolt (3) and which acts against the inner contour of a hole (21) defined in the arm (2), the rotation of the cam (33) causing the arm to move around the said first axis (z) for centering the cutting disc (5) with the base (1) and, a threaded upper section (34), aligned with the cylindrical lower section (31) and protruding at the top from the arm (2) for mounting a fastening nut (36) for fastening the arm (2) to the adjustment bolt (3) in different relative positions; wherein: the hole (21) in the arm containing the cam (33) has a square section and, the cam (33) has a symmetrical profile, inscribed in the square section of the square hole (21) in the arm, formed by two curved sectors (3a, 3b) of different curvature and with the axis thereof displaced toward the vertex of the curved sector (3b) of greater curvature; said cam (33) having a length, in the direction of the axis of symmetry (3c) thereof, and a width, in a direction perpendicular to the axis of symmetry (3c) thereof, of a dimension equal to the length of the side of the aforementioned square hole (21); such that the rotation of the adjustment bolt (3) causes the arm to move along a square path (T) and the cutting disc (5) to be adjusted in two directions (x, y), parallel and perpendicular to the longitudinal direction (x) of the base.

2. The device according to claim 1, wherein the adjustment bolt (3) comprises between the cylindrical lower section (31) and the cam (33) a perimeter thickening (32) that forms a lower support stop of the arm.

3. The device according to claim 1, further comprising a locking screw for locking the arm with respect to the base, threadedly mounted in a threaded hole in the base and mounted through a loose hole in the arm, said screw having a washer and a tightening head on the upper surface of the arm.

4. The device according to claim 1, further comprising two adjustment bolts arranged on two opposite sides of the arm and mounted in respective holes parallel to the longitudinal direction of the base.

5. The device according to claim 2, further comprising two adjustment bolts arranged on two opposite sides of the arm and mounted in respective holes parallel to the longitudinal direction of the base.

6. The device according to claim 3, further comprising two adjustment bolts arranged on two opposite sides of the arm and mounted in respective holes parallel to the longitudinal direction of the base.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] As a complement to the description provided herein, and for the purpose of helping to make the features of the invention more readily understandable, the present specification is accompanied by a set of drawings which, by way of illustration and not limitation, represent the following:

[0020] FIG. 1 shows a partial perspective view of a machine for cutting floor tiles with the adjustment device of the present invention.

[0021] FIG. 2 shows a partial perspective view of the area of the base intended for the mounting of the arm, one of the adjustment bolts and one of the locking screws being represented in said area and in a disassembled position.

[0022] FIG. 3 shows a partial plan view of the mounting area for mounting the arm on the base wherein the locking screws and the adjustment bolt are represented mounted only on one side of the arm, being able to see the mounting holes of said elements on the other side of the arm.

[0023] FIG. 4 corresponds to the cross section A-A referred to in FIG. 3.

[0024] FIG. 5 shows a perspective view of one of the adjustment bolts.

[0025] FIG. 6 shows a plan view of the cam of one of the adjustment screws housed in the corresponding square hole of the arm, the displacement of the square path, “T”, followed by the arm during the rotation of the cam also being schematically represented.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

[0026] As can be seen in FIG. 1, the adjustment device for machines for cutting floor tiles is applicable to cutting machines provided with a base (1) on which the floor tiles to be cut move in a longitudinal direction (x) and an arm (2) carrying a cutting head provided with a cutting disc (5) driven by an electric motor.

[0027] The purpose of the device in question is for the user to quickly and comfortably adjust the position of the arm (2) with respect to the base (1), so that the cutting disc is centered on the base in the longitudinal direction (x).

[0028] In the example shown, the base comprises two holes (11) for rotatably mounting respective adjustment bolts (3) for adjusting the position of the arm (2) in a plane (x, y) and threaded holes (12) for mounting locking screws (4) provided with a washer (41) and a head (42), suitable for pressing the arm (2) against the base (1), immobilizing it once the position of the arm (2) has been adjusted and the cutting disc (5) is centered with respect to the base (1).

[0029] The arm (2) has on two opposite sides a square hole (21) which ends at the top in a seat (22), and holes (23) for the loose mounting of the locking screws (4) that are mounted in the threaded holes (12) of the base (1).

[0030] Each adjustment bolt (3) comprises in ascending order: a cylindrical lower section (31) rotatably housed in the corresponding hole (11) of the base on a first vertical axis (z); a perimeter thickening (32) that forms a lower support stop of the arm (2); a cam (33) defined in an intermediate area of the adjustment bolt and that acts against the inner contour of the square hole (21) in the arm (2) and a threaded upper section (34), aligned with the cylindrical lower section (31) and which protrudes at the top from the arm (2) for mounting a washer (35) and fastening nut (36) for fastening the arm (2) to the adjustment bolt (3).

[0031] To rotate the adjustment bolt (3), the threaded upper section (34) has at the end thereof a hexagonal housing (37) for coupling an actuation key.

[0032] The nut (36) acts by means of the washer (35) against the upper surface of the arm (2) and presses it against the lower stop (32), blocking the relative movement between the adjustable cam (3) and the arm (2) once said arm has been placed in the chosen position. In this position, the washer (35) is housed in the seat (22) of the arm.

[0033] As can be seen in FIG. 6, the cam (33) has a symmetrical cam profile, inscribed in the section of the square hole (21) in the arm (2); said cam profile is formed by two curved sectors (3a, 3b) of different curvature and with the axis of rotation thereof displaced toward the vertex of the curved sector (3b) of greater curvature; said cam (33) having a length in the direction of the axis of symmetry (3c) thereof, and a width in a direction perpendicular to said axis of symmetry (3c), both coinciding with the length of the side of the aforementioned square hole (21); such that the rotation of the adjustment bolt (3) causes the arm (2) to move along a square path (T) and the cutting disc (5) to be adjusted in two directions (x, y) parallel and perpendicular to the longitudinal direction (x) of the base.

[0034] In the example of FIG. 6, the curved sector (3a) of smaller curvature is a circular sector, and the curved sector (3b) of greatest curvature is an oval or elliptical sector.

[0035] Adjusting the position of the arm (2) along a square path enables the cutting disc (5) to be quickly and easily arranged in the suitable cutting position with respect to the base (1).

[0036] Once the position of the arm 2 has been adjusted, it is immobilized with respect to the adjustment bolts (3) by tightening the nuts (36) and immobilizing the assembly with respect to the base (1) by tightening the locking screws (4).

[0037] Having sufficiently described the nature of the invention, in addition to a preferred exemplary embodiment, it is hereby stated for the relevant purposes that the materials, shape, size and layout of the described elements may be modified, provided that it does not imply altering the essential features of the invention claimed below.