Patent Application
20080078276
The technical features of the invention, with reference to the above aims, are clearly described in the claims below and its advantages are more apparent from the detailed description which follows, with reference to the accompanying drawings which illustrate a preferred embodiment of the invention provided merely by way of example without restricting the scope of the inventive concept, and in which:
With reference to the accompanying drawings, in particular
This panel saw machine, labeled 2 in its entirety, essentially comprises:
a horizontal table 3 for supporting the panels 1;
means 4 for advancing the panels 1 along a feed line A and mobile in a direction parallel to and along the horizontal table 3 (illustrated schematically with gripper clamps 4p, being of customary type and not strictly relevant to this invention);
a straight cutting unit 5 transversal to the feed line A and comprising at least one base 10, presser means 6 for holding down the panels 1, and a first saw blade 7 positioned close to the presser means 6, mobile in both directions and protruding lengthways from a slot made in the horizontal table 3 in such a way as to cut the panels 1 along a line T transversal to the feed line A.
As illustrated in
a carriage 8 which rotatably mounts the first blade 7 and which is rotatably connected to adjustable horizontal guide means 9 associated with the mounting base 10 defined by a vertical wall 10;
first means 11 for driving the carriage 8, designed to allow the carriage 8 to move in both directions along the transversal line T;
second means 12 for driving the first blade 7, mounted under the horizontal table 3, associated with the mounting wall 10 and kinematically connected, through first drive transmission means 13, to the first blade 7 in such a way as to enable the first blade 7 to rotate continuously independently of its position along the transversal cutting line T.
In addition, (see
Again with reference to
Looking more closely at the technical details (see
The first drive means 11 comprise a pair of first pulleys 11a and 11b, mounted at the respective ends of the cutting unit 5 and rotatably constrained to the horizontal plate 17.
Trained around the pair of first pulleys 11a and 11b there is a first endless belt 180 for driving the carriage 8 and associated, at its free ends, with the carriage 8 itself.
Further, the pulley labeled 11a is connected to a respective first drive unit 190 (for example, a customary geared motor) for driving the pulleys 11a and 11b and, hence, the carriage 8 by pushing and/or pulling.
The aforementioned second means 12 for driving the two blades 7 and 15 comprise a second drive unit 12m mounted close to the mounting wall 10 (positioned on a tread surface under the table 3) and used to drive a second endless belt or cable 20 (preferably of steel) trained around at least one second pair of pulleys 21 and 22 rotatably associated with the ends of the wall 10 in such a way that the sections of the second belt 20 are positioned at least along the full extent of the cutting unit 5.
It should be underlined that the belts or cables described in this text and illustrated in the accompanying drawings may be of any kind, that is to say, toothed belts, flat belts, Vee belts or cables made of any material, without thereby restricting the scope of the inventive concept.
The upper section 20a of the second belt 20 is engaged with the first drive transmission means 13 positioned on the carriage 8 in order to drive the first blade 7 independently of the movement and position of the carriage 8 along the cutting unit 5.
More specifically, the first drive transmission means 13 (see
The third pulley 23 is coaxially keyed to one of a fourth pair of pulleys 24a and 24b with a third endless belt 25 trained around them; the other fourth pulley 24b is coaxially keyed to a shaft 26 that mounts the first blade 7 and rotationally drives the latter by transmitting the motion derived from the third pulley 23.
The above mentioned second transmission means 16 may comprise a fourth endless belt 27 trained around a fifth pair of pulleys 27a and 27b, one of which is coaxially keyed to the second blade 15. The fifth pulley 27b is rotatably keyed to the carriage 8 in a position such that it engages, by means of a sixth pulley 28 coaxial with and connected to the fifth pulley 27b, a section of the third belt 25 that drives the first blade 7 in such a way as to simultaneously also rotate the second blade 15.
The aforementioned means 14 for adjusting the height H of the first blade 7 may comprise at least one pair of vertical guides 14a and 14b that run along the wall 10 and are associated at their upper ends with the plate 17 that mounts the carriage 8 and the guides 18 and 19.
Close to each guide 14a and 14b there is at least one actuating element 30, 31, acting on the plate 17 and integral with the wall 10 in such a way as to enable the plate 17 to be adjusted vertically in both directions (as clearly illustrated also in
In particular, but without limiting the scope of the invention, each guide 14a and 14b may be equipped with a pair of actuating elements 30, 31 positioned on opposite sides of, and associated with, the guide 14a and 14b, and acting with its stem on the plate 17.
Obviously, there may be more than two guides 14a, 14b, depending on the size and extent of the cutting unit 5, without thereby limiting the scope of the inventive concept.
In view of the possibility of adjusting the carriage 8 in height (obviously within a certain operating range depending on the diameter of the blade and on the number and thickness of the panels), the invention contemplates the provision of two wheels 23a, 23b on opposite sides of the third pulley 23, for transmitting motion to the upper section 20a of the second belt 20 in such a way as to define the path of the belt 20 and keep the latter tensioned and in contact with the third pulley 23.
A panel saw machine made as described above thus achieves the above mentioned aims thanks to a structure for driving and adjusting the blade carriage made extremely simple and light.
This is made possible by the fact that the mobile parts of the blade unit consist of a simple carriage with the two blades on it and a plurality of belts and pulleys mounted on a plate equipped with slide guides and on which there is only the system for driving the carriage drive pulleys.
The rotational drive of the blades, on the other hand, is indirect, independent of the carriage and accomplished by a belt and by the blade transmission elements: that means the moving parts are lighter in weight and eliminates the need for electrical and air connections that move along with the carriage, with obvious advantages in terms of machine reliability and safety.
Moreover, the height adjustment of the blade is accomplished by guides located on the vertical wall and connected directly to the mounting plate which is thus able to slide in both directions to enable the blades to be correctly positioned in height.
This type of architecture, therefore, optimizes the cutting area, making it inexpensive and free of moving cables and conduits for the electrical and air systems and thus reducing maintenance requirements and times.
The invention described above is susceptible of industrial application and may be modified and adapted in several ways without thereby departing from the scope of the inventive concept. Moreover, all the details of the invention may be substituted by technically equivalent elements.
| Number | Date | Country | Kind |
|---|---|---|---|
| BO2006A000673 | Sep 2006 | IT | national |
