RIBBON SAW WITH DOUBLE SECURITY SYSTEM

Abstract

A ribbon saw with a double security system is provided that includes a cutting ribbon (3), vertically installed between an upper part (1a) and a lower part (1b) with driving mechanism and control electronics. The control electronics include a first artificial vision security system, with a camera (5) and a second magnetic artificial vision security system, with an inductive sensor or metal detector (6) installed on the table (4), in front of the cutting ribbon (3). The security system is connected to one or two braking systems (14,15) based on a disc (14) and a pneumatic clamp (15) that stops the mechanism of pulleys (12a, 12b) of the ribbon (3), when it detects the color and the metallic or ferrous material of the gloves that the operator wears.

Claims

1. A ribbon saw with double security system coupled to a machine (1) and comprising a cutting ribbon (3), vertically installed in a mechanism of pulleys (12a, 12b) between an upper part (1a) and a lower part (1b) of its structure, with an electric motor (13) or other driving means and control electronics, and possessing a first artificial vision security system that comprises, at least, a camera (5) installed so that it remains oriented towards the table (4) which is defined at the lower part (1b) and so that it captures the image of the ribbon (3) cutting area, the said camera (5) being connected to the control electronics to trigger braking means that stop triggering the cutting ribbon (3) when it detects a predetermined color of the gloves that the operator wears, and comprising a second magnetic security system that, in turn, comprises, at least, a detector installed on the table (4), just in front of the cutting ribbon (3), said detector being connected to the control electronics in order that at least a braking system (14/15) is automatically triggered, that stops in a few milliseconds the cutting ribbon (3) when remotely detecting and without contact, the presence on it of metal detectable blue gloves the operator wears and characterized in that the double security system comprises at least one braking system, that is acting as well for what is detected by the camera (5) of the artificial vision system as by the inductive sensor or metal detector (6) of the magnetic system, is an indirect system that acts on the means triggering the mechanism of pulleys (12a, 12b) of the ribbon (3), comprising a disc (14) associated with the mechanism and a pneumatic clamp (15).

2. The ribbon saw according to the claim 1, characterized in the detector installed on the table (4) is an inductive sensor or a metal detector (6).

3. The ribbon saw according to the claim 2, characterized in that the inductive sensor or metal detector (6) has a rectangular configuration.

4. The ribbon saw according to the claim 1, characterized in that the detector is incorporated on the table (4) by means of a tilting anchorage that allows to withdraw it without dismounting it to have access to the cutting ribbon (3) and be able to change it.

5. The ribbon saw according to the claim 1, characterized in that the braking system comprises a pneumatic clamp (15) that acts on a brake disc (14) that, in turn, is located intercalated on a common shaft (16) between the driving wheel (17) that moves the lower pulley (12b) and the said lower pulley (2b).

6. The ribbon saw according to the claim 5, characterized in that the brake clamp (15) has a negative performance, that means, lacking air pressure, it is always closed, and the pneumatic pressure is used for its opening.

7. The ribbon saw according to the claim 5, characterized in that the driving wheel (17) is linked to the electric motor (13) through a transmission (18).

8. The ribbon saw according to the claim 7, characterized in that the existence of a torque limiter (19) is provided on the shaft (16) wheel-disc (17/14) driven of the transmission (18).

9. The ribbon saw according to claim 1, characterized in that it includes, under the recess (2a) of the upper part (1a) of the structure, a second braking system that comprises a pneumatic clamp (15), connected to the control electronics and a brake disc (14) fixed integral with the shaft of the lower pulley (12a), the brake clamp (15) being conveniently connected to a fluid deposit (151) and to a compressor (152).

10. The ribbon saw according to claim 1, characterized in that it comprises, on the upper part (1a) of the structure, just above the area where the cutting ribbon (3) emerges, a light (7) incorporated on an orientable support (8).

11. The ribbon saw according to claim 1, characterized in that, on the upper part (1a) of the structure, the existence has been provided of an indicator light device (9) with both indicator lights, red and green, of the state of operation of the machine.

Description

DESCRIPTION OF THE DRAWINGS

[0030] To complement the description being carried out and in order to assist to best understand the characteristics of the invention, attached to this specification, as an integral part thereof, there is a drawing in which, for illustration and no limitation purpose, the following has been represented:

[0031] The FIG. 1.It shows a schematic side elevation view of an example of embodiment of the ribbon saw with double security system object of the invention, the main parts and elements it comprises can be seen, as well as the configuration and arrangement thereof;

[0032] the FIG. 2.It shows a top perspective view of a portion of the example of the ribbon saw shown in the FIG. 1, the cutting table can be seen in this case with the ribbon where the inductive sensor or metal detector is located;

[0033] the FIG. 3.It shows a schematic side elevation view and section of the saw of the invention, where the system of pulleys has been represented that moves the ribbon; and ribbon (3) from the said front side (1c); and

[0034] the FIG. 4It shows a schematic of the mechanism inside a housing provided behind a wall (21) of the recess (2b) of the lower part (1b) of the structure of the machine (1).

[0035] In addition, the machine (1) possesses a first artificial vision security system that comprises, at least, a camera (5) for capturing image installed at the upper part (1a) of the structure, on the recess (2a) thereof, oriented towards the table (4) and so that it captures the image of the ribbon (3) cutting area, the said camera (5) being connected to the control electronics in order that, when it detects an element of a given predetermined color, preferably blue color, the color of the gloves that the operator will wear, braking means (14/15) will be automatically triggered that stops the cutting ribbon (3) drive in a few milliseconds.

[0036] From the said already known configuration, the machine (1) that constitutes the ribbon saw object of this invention is distinguished in that it comprises a second magnetic security system that, in turn, comprises, at least, an inductive sensor or metal detector (6) installed on the table (4), just ahead of the cutting ribbon (3) exposed part, connected to the control electronics in order that, when remotely detecting and without contact the presence on it of detectable metal blue gloves the operator will wear, at least the braking system (14/15) is automatically triggered that stops the cutting ribbon (3) drive in a few milliseconds.

[0037] Preferably, the inductive sensor or metal detector (6) that the machine (1) comprises has a rectangular configuration hygienically encapsulated flush to the table (4) surface.

[0038] Preferably, the inductive sensor or metal detector (6) is incorporated to the table (4) by means of a tilting anchorage (not appearing in the figures) that allows to withdraw it without dismounting it to easily have access to the cutting ribbon (3) and to proceed to replacing it every time it is convenient.

[0039] On its part, the braking means that the machine (1) possesses and that act as well by what is detected by the camera (5) of the artificial vision system as by the inductive sensor or metal detector (6) of the magnetic security system, comprise at least an indirect braking system that, instead of on the ribbon (3), acts on the means that trigger the mechanism of pulleys (12a, 12b), comprising a disc (14) associated to the mechanism of pulleys (12a, 12b) and a pneumatic clamp (15) that remains protected and separated from the said mechanism inside a housing provided behind a wall (21) of the recess (2b) of the lower part (1b) of the structure of the machine.

[0040] Preferably, the at least one braking system comprises, basically, a pneumatic clamp (15) that, connected to the control electronics, acts on a brake disc (14) that, in turn, is intercalated on a common shaft (16) between the driving wheel (17) and the lower pulley (12b) that moves the said wheel (17), the said driving wheel (17) being linked to the electric motor (13) that drives it, preferably, in this case, through a transmission (18).

[0041] Preferably, as best seen in FIG. 4, the brake clamp (15), conveniently connected to a fluid deposit (151) and to a compressor (152), has a negative performance, that means, lacking air pressure, it is always close, and the pneumatic pressure is used for opening it, so that, facing any failure of pressure in the pneumatic circuit or compressor, it is closed and brakes the disc (14) that, in turn, stops the mechanism that moves the ribbon (3).

[0042] Preferably, the joint between the disc (14) and the driving wheel (17) is direct, as they are mounted on a same shaft (16).

[0043] Preferably, in addition to the transmission (18) and spacing of shafts between the motor shaft (13) and the shaft (16) of the wheel-disc, the existence of a torque limiter (19) is provided on the shaft (16) (and) wheel-disc (17/14) driven of the transmission (18) that helps to reduce the charge of inertia on the brake disc (14), apart from unbinding it from the inertia of the motor (13) rotor.

[0044] And, although it was not represented in the figures as it is very similar to that represented in the FIG. 4, in a preferred embodiment of the invention, the machine (1) comprises, under the recess (2a) of the upper part (1a) of the structure, a second braking system that also comprises a pneumatic clamp (15) that, connected to the control electronics, acts on a brake disc (14) that, in turn, is fixed integral with the shaft of the lower pulley (12a), the brake clamp (15) being conveniently connected to a fluid deposit (151) and to a compressor (152).

[0045] On the other hand, in a preferred embodiment of the invention, the machine (1) comprises, under the said recess (2a) of the upper part (1a) of the structure, just on the area where the cutting ribbon (3) emerges, a light (7) or spotlight to provide a greatest accurateness in the capture of image of the camera (5), the light (7) of which, preferably, is incorporated on an orientable support (8).

[0046] In addition, in a preferred embodiment of the machine (1), on the top part (1a) of the structure, the existence has been provided of an indicator light device (9) with both indicator lights, red and green, of the state of operation of the machine, as well as a ribbon (10) tightening device and an emergency stop push-button (11).

[0047] Sufficiently disclosed the nature of this invention, as well as the manner of implementing it, it is not deemed necessary to extend anymore its explanation in order that any person skilled in the art understands its extends and the advantages arising from it.