IT202000025459A1 - PROTECTIVE EQUIPMENT FOR SLIDING GUIDES OF A MACHINE TOOL, AND RELATED MACHINE TOOL, IN PARTICULAR A GRINDING MACHINE - Google Patents

Description

DESCRIPTION of the industrial invention entitled:

"Protection apparatus for sliding guides of a machine tool, and related machine tool, in particular grinding machine?

The present invention relates to a protection apparatus for sliding guides of a machine tool, and to a related machine tool, in particular a grinding machine, comprising this apparatus.

The protection apparatus according to the invention is characterized by its high simplicity. and above all speed? of assembly/disassembly with respect to the known solutions, and ? particularly suitable for use with grinding machines.

Therefore, this apparatus will come described below with particular reference to this machine tool without intending in any way to limit its possible application to other types of machine tools.

As is known, grinding machines, as well as other machine tools, comprise a base equipped with sliding guides along which a tool-holder carriage moves, typically an abrasive wheel in the case of a grinding machine.

In such cars ? very important to ensure the? integrity? and protection of the sliding guides from the infiltration of polluting agents which could lead to their damage.

For this purpose, protections have been adopted which must guarantee a perfect watertight seal to prevent the entry into the sliding guides of such polluting agents, such as, for example, emulsion, water, and sludge, i.e. a mixture of worn material from the grinding wheel or other tool used due to its wear and tear and material removed from the pieces during machining, etc.

These guards are generally telescopic casings which can weigh up to a few tens of kilograms and generally comprise at least a first component, usually screwed to the fixed base, and at least a second component screwed and movable integrally with the tool trolley. Silicone is normally used for the watertight seal between the carriage or the base and the elements of the protection.

Over time and without adequate sealing, infiltrations combined with poor or non-existent maintenance lead to deterioration of the protection. At that point, the guides and the lubrication system become clogged, quickly leading to a loss of the machine geometries. Once the turcite has been destroyed, that is to say the material which preserves the geometry and the parallelism of the axis of the guides, the state of the guides? compromised and a restoration intervention becomes unavoidable.

In these situations, on machine tools in general, and in particular on grinding machines, the operations of disassembly and maintenance or replacement with relative reassembly of the guide guards, unfortunately today represent one of the most difficult obstacles. complexes that a mechatronic maintenance technician has to face.

For example, the case of an opening and subsequent closing of the same protection already? used on a machine, while representing a case more? facilitated compared to the complete replacement, ? in any case very complex due to the reduced overall dimensions which make the operation of removing the many assembly screws of the guard on the tool trolley long and difficult. In fact, in order to be able to disassemble and remove the telescopic guard even only momentarily, for example for checking purposes, it is also necessary to disassemble the screws fastening it to the base. Furthermore, some screws could be hardened by infiltrated and sedimented contaminants, making it necessary to destroy these screws with a drill bit and considerably lengthening the intervention times.

The reassembly of the same protection that is still functional essentially requires the same number of long and laborious operations preceded by thorough cleaning of the work area in which the screws are screwed back in, eliminating the remaining silicone residues and positioning new silicone beads.

The operation of replacing a damaged guide protection with a new one? even more burdensome. In fact, in this case, in addition to the disassembly phases described above, at the time of assembly it is first necessary to position the new telescopic protection in the machine, then mark the holes using at least two technicians, one of whom supports the telescopic, given that it is not possible to do so. rest on the base, while the other marks the points for the holes, for example with an indelible brush or drill bit. Subsequently, the new protection must be extracted again from the machine and placed on a workbench, in order to be able to proceed with the drilling and subsequent tapping of the threads which will house the respective fixing screws.

This operation must be repeated for all the holes and ? a very delicate operation which must be carried out with extreme precision given that the distance between the threaded holes allows tight tolerances and the protection must not be damaged.

At that point, the protection can? be mounted on the machine, applying the silicone again to guarantee its seal.

These operations therefore require a machine downtime of several hours, which can even double bearing in mind that usually each machine tool uses at least two guides and therefore has two protections on which to intervene if necessary.

This old concept for guide protections therefore has design and construction problems that require long, expensive and even dangerous interventions for the technicians who often and more often have to work during disassembly and reassembly operations. sometimes slip into the machine and work in awkward and unsafe positions where the risk of injury is? very high.

For all these reasons, rather than visually checking the status of the guides and then opening the relative protections, operators often prefer to take the machine tool to the limit and that is at the time of the ?non-functioning?, therefore at the final failure, instead of realizing an initial damage and having the possibility? to take the appropriate countermeasures at a cost pi? low, although still not negligible.

Therefore, the purpose of the present invention ? to propose a solution that allows you to mitigate at least in part one or more? of the drawbacks mentioned above, and in particular of realizing a protection apparatus which, with respect to the known solutions, is more? simple and quick to assemble and disassemble, while ensuring the most? high standards of sealing against the infiltration of polluting agents which could deteriorate the correct functioning of the sliding guides.

This purpose, as well as other objects which will become clearer from the following description are achieved by a protection apparatus whose characteristics are defined in claim 1.

This purpose, as well as others which will become clearer from the following description are also achieved by a machine tool comprising at least one protection apparatus of the type mentioned above, as detailed in the following description, and more? particularly as defined in the respective claim(s) annexed thereto.

Particular embodiments form the subject of the dependent claims, the content of which? to be understood as an integral part of this description.

Further characteristics and advantages of the invention will appear from the detailed description which follows, carried out purely by way of non-limiting example, with reference to the attached drawings, in which: figure 1? a perspective view schematically illustrating a portion of a machine tool provided with a protection apparatus according to the present invention;

Figure 2 illustrates a possible embodiment of a connection device used in the protection apparatus according to the present invention;

figure 3 ? a sectional view schematically illustrating the protection apparatus according to the invention applied to the tool carriage of the machine tool of figure 1.

It should be noted that in the detailed description that follows, identical or similar components, from a structural and/or functional point of view, may have the same or different reference numerals, regardless of whether they are shown in different embodiments of the present invention or in distinct parts.

It should also be noted that in order to clearly and concisely describe the present invention, the drawings may not necessarily be to scale and some features of the disclosure may be shown in somewhat schematic form.

In addition, when the term "adapted" or "arranged" or "configured" or "shaped" or a similar term is used herein, referring to any component as a whole, or to any part of a component or a combination of components , it is to be understood that it means and correspondingly includes the structure and/or configuration and/or shape and/or positioning.

In addition, when the term "substantial" or "substantially" is used herein, it is to be understood as including an actual variation of more than one? 5% or less compared to what is indicated as the reference value or position, and when the terms ?transversal? or ?transversely? used herein are to be understood as including a direction not parallel to the reference part(s) or direction(s)/axis to which they refer, and perpendicularity? ? to be considered a specific case of transversal direction.

Finally, in the description and in the following claims, the ordinal numerals first, second, et cetera, will be used only for reasons of illustrative clarity and in no way are to be understood as limiting for any reason whatsoever; in particular, the indication of a component referred to for example as "the second base..." does not necessarily imply the presence or the stringent requirement that there is a previous "first base", unless such presence is clearly evident for the correct functioning of the embodiments described, n? that the order should be exactly in the sequence described with reference to the illustrated exemplary embodiments.

Figure 3 schematically illustrates a protection apparatus, indicated as a whole by the reference numeral 100, for a machine tool.

An example of such a machine tool, in particular of a grinding machine, ? partially illustrated in the embodiment of figure 1, in which the machine is indicated by the overall reference number 1.

As illustrated, the machine tool 1 comprises a base 2 on which defined at least one sliding guide 3 and a tool trolley 4 sliding on the base 2 along the at least one sliding guide 3.

In the example illustrated in figure 1, the sliding of the tool holder carriage 4 is achieved through the actuation of a recirculating screw 6, and the tool trolley 4 slides along two parallel side guides 3.

Clearly, the 4 tool trolley can? be shaped and handled in any form, and can? be used to carry any tool, such as a grinding wheel (not shown in the figure) or other.

Furthermore, the number, and/or the position, and/or the shape of the sliding guides 3 can vary according to the specific needs; therefore, the protection apparatus 100 according to the invention will be described below by referring for simplicity? to its application to a single sliding guide 3, as schematically represented by the circular area in figure 1, but ? to be understood as applicable or replicable to any type and number of sliding guides that can be protected by this apparatus 100.

Pi? in detail, the protection apparatus 100 according to the invention comprises at least one protection device for at least one sliding guide 3, indicated in figure 3 by the overall reference number 10.

How will it turn out? more in detail from the following description, as a whole the protection device 10 has a shaped body, made in a single piece or in several? parts assembled together, that ? configured in particular to form one or more? protective barriers against the infiltration of polluting agents, such as for example water, various lubricants, various dust or dirt caused, for example, by residues produced by the workpiece or by wear of the tool itself, and so on.

The protection apparatus 100 according to the invention also comprises at least one first connection device indicated by the overall reference number 20, which is schematically represented in figure 1 with dotted lines and of which a possible embodiment? illustrated in figure 2.

Advantageously, as a whole this connection device 20 is configured to mechanically couple the protection device 10 to the tool trolley 4 between a position of protection of the at least one sliding guide 3 from the infiltration of polluting agents in which the protection device 10 is? integrally hooked to the tool trolley 4 with at least one of its first walls 11 kept in abutment against a corresponding wall of the tool trolley 4, for example the front wall 5 (relative to a front view of figure 1), and a second position able to allow the total disassembly, i.e. the removal of the protective device 10 from the tool carriage 4, or a partial disassembly, i.e. the displacement of the protective device 10 with respect to the tool carriage 4 without necessarily having to remove it completely.

In particular, in the second position said first wall 11 of the protection device 10? distanceable from the corresponding front wall 5 of the tool trolley 4 so as to allow a visual inspection of the sliding guide 3 while keeping the protective device 10 hooked to the tool trolley 4 or to allow the quick disassembly and removal of the protective device 10 from the tool trolley 4.

In one possible embodiment of the protection apparatus 100, the connection device 20 comprises at least:

- a first component, indicated in Figure 2 by the reference number 21, adapted to be connected directly or indirectly, and preferably in a removable manner, to one of the tool trolley 4 and the protection device 10; and

- a second component, indicated in figure 2 by the reference number 26 operatively connected to the first component 21.

In particular, the second component 26 comprises:

- a first fixed portion 27 able to be connected directly or indirectly, and preferably in a removable manner, to the other between the tool trolley 4 and the protection device 10; and

- a second portion 28 which ? movable with respect to the fixed portion 27 between a hooking position in which the protection device 10 ? brought into the protection position, as illustrated in figure 3, and a release position in which the protection device 10 is in said second position with the first wall 11 which ? distanceable from the corresponding front wall 5 of the tool trolley 4.

In this second position, as previously indicated, depending on the specific applications and circumstances, ? alternatively it is possible to slightly distance the wall 11 from the corresponding wall 5 of the tool trolley 4 allowing a direct view of the sliding guide 3, or can this spacing be involve the rapid disassembly of the protection device 10 for a more? in-depth inspection and possible maintenance/replacement of the guide itself 3.

In practice, in the apparatus 100 according to the invention the first component 21 and the second component 26 can advantageously be connected to the tool trolley 4 or to the protection device 10 in an interchangeable manner depending on the specific application requirements. Therefore, if the first component 21 ? fixed directly or indirectly, for example to the tool trolley 4, the second component 26 will be? directly or indirectly fixed to the protection device 10 and vice versa.

Also, with the definition of direct or indirect connection ? to understand here the possibility? that the first component 21 or the second component 26 are fixed directly on the body of the tool trolley 4 or of the protection device 10, i.e. without the interposition of other components, or that there is interposed (indirect connection) between them at least one other component fixed for example to the trolley 4 or to the protective device 10 on which the first component 21 or the second component 26 is in turn fixed.

Usefully, in the protection apparatus 100 according to the invention, the connection device 20 comprises means for adjusting the relative position between said first and second components 21 and 26.

In particular, according to the possible embodiment illustrated in figure 3, the connection device 20 comprises a third component, illustrated in figure 2 by the reference number 40 which ? configured so as to mechanically interconnect the first component 21 to the second component 26.

Preferably, in a possible embodiment, the above-mentioned position adjustment means comprise first position adjustment means, defined for example on the third component 40, and second position adjustment means, defined for example on the second component 26.

Pi? in detail, in the embodiment illustrated in Figure 2, the third component 40 comprises a head portion 42, for example triangular in shape, capable of mechanically coupling with the first component 21, and a stem 44 which extends from the head portion 42 and ? at least for a part of its extension provided with a thread 41 forming said first position adjustment means.

In turn, the first component 21 comprises a substantially flat first base 22 having at least one through hole 23 suitable for receiving means for direct or indirect fastening to the protective device 10 or to the tool trolley 4, and a hook portion 24 which extends from the base 22 and ? adapted to mechanically couple with the head portion 42 of the third component 40.

In the illustrated embodiment, the flat base 22 is provided with two holes 23 suitable for each receiving, for example, a corresponding fixing screw.

As illustrated in Figure 2, the first fixed portion 27 of the second component 26 comprises a substantially flat base 29, indicated for purposes of descriptive clarity as the second base 29, which has at least one first through hole 30 suitable for receiving means for direct fastening or indirectly to the protection device 10 or to the tool trolley 4, and at least one pin 32 for connection with the second mobile portion 28.

In the illustrated embodiment, the first fixed portion 27 comprises two through holes 30 suitable for receiving, for example , corresponding fastening screws, and two small pins 34 located at one end. of the second base 29 spaced and aligned with each other along an axis of rotation X.

In turn, the second mobile portion 28 comprises:

- a U-shaped body whose two lateral branches 35, 36 are hinged and rotate, at the respective ends? free 35a, 36a, to the second base 29 by means of said at least one pin 32; and

- a transversal wall 37 which joins the two lateral branches 35, 36 on which ? defined a threaded through hole 38.

In particular, each of the extremities? free 35a and 36a? preferably pivoted on a corresponding pin 32, so that the mobile part 28 can rotate around the axis X with respect to the fixed part 27.

Usefully, in the embodiment illustrated, the threaded through hole 38 forms said second means for adjusting the position into which the thread 41 of the stem 44 of the third component 40 is screwed.

In a possible embodiment illustrated in figure 3, the first wall 11 of the protection device 10 has at least one section having a substantially rectilinear development on which a housing seat 13 is defined, and the protection apparatus 100 further comprises a gasket 60 inserted in the housing seat 13 so as to be pressed against the front wall 5 of the tool holder carriage 4 by the first wall 11 when the protection device 10 is? carried and is in the protective position.

Preferably, the body of the gasket 60 has a substantially filiform shape and is made of material such as to make it substantially elastic, for example in a special plastic material such as NBR.

In practice, during assembly, the third component 40 acts as a tie rod and, by screwing or unscrewing the second component 26 around the stem 41 of the third component 40 ? possible to suitably adjust the pulling force with which the protective device 10 is hooked to the tool trolley 4, and in particular to maximize the adhesion of its first wall 11 against the front wall 5 of the tool trolley 4.

In turn, the gasket 60 advantageously allows a substantially watertight seal of the connection between the protection device 10 and the tool trolley 4, according to a much simpler solution. simple and with a reduced environmental impact compared to the use of silicone or other equivalent materials. Also, the gasket 60 provides some ?elasticity? to the connection between the walls 11 and 5 of the protection device 10 and the trolley 4, improving their mutual coupling.

Usefully, the protection device 10 also comprises a second wall 15 which extends, at an upper edge 7 of the front wall 5 of the tool holder trolley 4, from one end of the first wall 11 and transversely with respect to it, towards the inside of the tool trolley 4 so as to at least partially cover this upper edge 7.

Preferably, the protection device 10 used in the apparatus 100 according to the invention also comprises a third wall 17 which extends, at said end of the first wall 11, transversely with respect to it and in the opposite direction to the second wall 15. On said third wall 17 ? also defined at least one hole 18 for the direct or indirect fixing of the first component 21 or of the second component 26.

In the embodiment illustrated in Figure 3, the third wall 17 comprises, for example, two holes 18 each capable of being aligned with a corresponding through hole 30 of the second base 29.

Finally, in a possible embodiment illustrated in figure 3, the protection apparatus 100 also comprises at least one additional support or adaptation block 70 which is fixed on a second wall 8 of the tool trolley 4 transversal to the first front wall 5, for example the upper wall, and has at least one hole 9 for fixing the first component 21 or the second component 26. This additional block 70 can? be suitably sized according to the specific applications, for example so as to easily adapt the protection apparatus 100 to the tool trolley 4 of the specific machine tool 1.

In the embodiment illustrated in figure 3, the block 70 is screwed to the body of the tool trolley 4 by means of at least one screw inserted in the side hole 5a, and ? provided with two holes 9 able to align each with a corresponding hole 23 defined on the base 22 of the first component 21.

In this embodiment, the first component 21 ? fixed, for example by screws, to the block 70 and then through it, ie indirectly, to the body of the tool trolley 4; moreover, on the third wall 17 of the protection device 10 two holes 9 are defined, each suitable for aligning with a corresponding hole 30 of the second base 29.

In this way, the fixed portion 27 of the second component 26 ? fixed directly to the third wall 17 of the protection device 10 with the second mobile portion 28 which can? rotate around the X axis.

During assembly or hooking, a rotation of the second mobile portion 28 in the direction indicated in figure 2 by the arrow A causes the protection device 10 to be hooked to the tool trolley 4 with its first wall 11 firmly abutting against the front wall 5 and the compressed gasket 60 which forms a further barrier to the infiltration towards the guide 3 of polluting agents, coming for example from the upper part of the tool carriage where the tool used for machining the pieces operates. Further contributing to this protection are the second wall 15, which forms a protective canopy at the edge 7, and the third wall 17 which, in addition to acting as a fixing structure for a part of the connection device 20, offers a further protection barrier to the diffusion of pollutants towards the area below where? the sliding guide 3 to be protected is positioned.

During the inspection and/or maintenance and/or replacement of the guides 3, a rotation of the movable portion 28 in the direction indicated in figure 2 by the arrow B, leads to the possibility to move the entire protective device 10 or at least part of it away from the tool trolley 4, in a limited way to carry out a visual inspection of the guide 3 or to disassemble it completely in an extremely rapid manner. In fact, thanks to the apparatus 100 according to the invention ? for example, it is sufficient to unscrew the component fixed to the carriage 4, i.e. the first component 21 according to the embodiment illustrated in figure 3.

During operation of the machine tool 1, the apparatus 100, and in particular the protection device 10, is hooked and moves solidly to the tool trolley 4.

In this case, and according to embodiments known or widely within the reach of a person skilled in the art, the protection device 10 can? assume a telescopic configuration in which a further protection element (not shown in the figures) is connected in a fixed position to the base 2 of the machine tool, and the protection device 10 described above can slide, with respect to the part fixed to the base 2, solidly with the tool trolley 4.

Yup ? in practice it has been ascertained that the protection apparatus 100 according to the invention allows the predetermined purpose to be achieved since it allows rapid access to the protected guides with very rapid execution times and clearly lower than known solutions, without compromising the condition of perfect watertightness which is very difficult to damage and resistant over time, and at decidedly low construction costs.

To obtain this, as previously illustrated, very simple components are used; in particular, the opening and closing mechanism ? essentially formed by the mobile portion 28 which functions as a lever and which, in collaboration with the hook-shaped part and with the third component which acts as a tie rod, ensure the positioning of the guard in the machine and manual opening in a few seconds without further tools ( except possibly the need to screw/unscrew the component fixed to the carriage 4). The ?coupling lever? realized is self-held in its position by its own pulling force in the closing phase, exceeding the maximum lever (extension) point. Furthermore, with respect to known solutions, the additional wall 15 and/or the additional wall 17 increase the overall surface of the protection and largely cover the area around the edge of the trolley.

With a further advantage, the protection apparatus 100 according to the invention can clearly be used both with new machine tools, both for the retrofitting of machine tools already? in work, without the need? to make changes or requiring at most simple adaptations. Therefore, a further object of the present invention relates to a machine tool, and in particular a grinding machine, comprising at least one protection apparatus according to the invention, as previously described and more? in particular defined in the preceding claims.

In particular, for each tool trolley 4 can? be used a desired number of protection devices 100, for example two devices placed at the two ends? opposite of the carriage along the same edge; the same can? take place along the opposite edge in correspondence with another sliding guide 3.

Of course, the principle of the invention remaining the same, the embodiments and the details of construction can be widely varied with respect to what ? been described and illustrated purely by way of a preferred but non-limiting example, without thereby departing from the scope of protection of the present invention as defined by the attached claims. For example, with respect to the embodiment of figure 3, depending on the different application requirements, the first component 21 could be connected to the third wall 17 and the second component 26 to the tool trolley 4; a further additional block, similar to block 70, could be used to fix the second component 26 indirectly to the third wall 17, or the two components 21 and 26 could both be fixed directly, one to the tool trolley 4 and the other to a portion of the protection device 10; the fixing holes provided on these components could be in different numbers and/or positioned differently; the protection device 10 can? be mounted protruding with respect to the tool trolley 4 not only frontally, but also from the lateral side of the tool trolley 4 as shown in figure 1, or can it? be mounted so that its external side is substantially aligned with the corresponding external side of the tool holder carriage 4, without protruding also from that side. Pi? in general, the shape of the components described or part of them could be modified as long as? in a manner compatible with the purpose and functionality? whereby such components or parts have been conceived within the scope of the present invention. For example the means for regulating the reciprocal position could be differently cofigured or differently positioned; could the connection device 20 as a whole be formed in a single piece or in a number of pieces other than that shown in figure 2, for example in two pieces, integrating the functionalities? of the third component 40 in one of the components 21 and 26 or in both.

Claims (12)

1. Protection apparatus (100) for a machine tool (1) comprising a base (2) on which ? defined at least one sliding guide (3) and a tool trolley (4) sliding on the base (2) along the at least one sliding guide (3), the protection apparatus (100) being characterized in that it comprises at least: - a protection device (10) for said at least one sliding guide (3); - at least one connection device (20) configured to mechanically couple the protection device (10) to the tool carriage (4) between a protection position of the at least one sliding guide (3), in which the protection device (10 ) ? solidly hooked to the tool trolley (4) with at least one first wall (11) kept in contact with a corresponding wall (5) of the tool trolley (4), and a second position in which said at least one first wall (11) of the protection (10) ? distanceable from the corresponding wall (5) of the tool trolley (4) so as to allow either a visual inspection of the sliding guide (3) keeping the protection device (10) coupled to the tool trolley (4), or the disassembly of the protective device (10) from the tool trolley (4). The protection apparatus (100) according to claim 1, wherein said connection device (20) comprises at least: - a first component (21) adapted to be connected, directly or indirectly, to one of the tool trolley (4) and the protection device (10); - a second component (26) operatively connected to the first component (21) and having at least one first fixed portion (27) able to be connected, directly or indirectly, to the other between the tool trolley (4) and the protection device ( 10), and a second portion (28) movable with respect to said first fixed portion (27) between a hooking position in which the protection device (10) ? brought into said protection position and a release position in which the protection device (10) is in said second position with the first wall (11) detachable from the corresponding wall (5) of the tool trolley (4). The protection apparatus (100) according to claim 2, wherein said connection device (20) comprises means for adjusting the relative position between said first and second components (21, 26). The protection apparatus (100) according to claim 3, wherein said connection device (20) comprises a third component (40) configured to mechanically interconnect said first component (21) to said second component (26), and wherein said relative position adjustment means comprises first position adjustment means (41) defined on the third component (40) and second position adjustment means (46) defined on said second component (26). 5. Protection apparatus (100) according to the preceding claim, wherein said third component (40) comprises a head portion (42) suitable for mechanical coupling with said first component (21) and a stem (44) which extends from the head portion (42) and ? at least for a part of its extension provided with a thread (41) forming said first position adjustment means. 6. Protection apparatus (100) according to one or more? of the preceding claims, wherein said first component (21) comprises a substantially flat first base (22) having at least one through hole (23) suitable for receiving means for direct or indirect fastening to the protection device (10) or to the tool carriage (4), and a hook portion (24) extending from first base (22) and ? adapted to mechanically couple with said head portion (42) of the third component (40). 7. Protection apparatus (100) according to one or more? of the preceding claims, wherein the first fixed portion (27) of the second component (26) comprises a substantially flat second base (29) having at least one first through hole (30) suitable for receiving means for direct or indirect fastening to the protection (10) or to the tool trolley (4), and at least one pin (32) for connection with said second movable portion (28), and in which the second movable portion (28) comprises a U-shaped body whose two lateral branches (35, 36) are pivotally hinged at their respective ends? free (35a, 36a) to the second base (29) by means of said at least one pin (32), and a transversal wall (37) which joins the two lateral branches (35, 36) and on which ? defined a threaded through hole (38) which forms said second position adjustment means. 8. Protection apparatus (100) according to one or more? of the preceding claims, wherein said first wall (11) of the protection device (10) has at least one section with a substantially rectilinear development on which? defined a housing seat (13), and in which the protection apparatus (100) further comprises a gasket (60) inserted in said housing seat (13) so as to be compressed between the first wall (11) of the device protective device (10) and said corresponding wall (5) of the tool trolley (4) when the protective device (10) is in this protective position. 9. Protection apparatus (100) according to one or more? of the preceding claims, wherein the protection device (10) also comprises a second wall (15) which extends, at an edge (7) of said corresponding wall (5) of the tool trolley (4), from one end of and transversely with respect to the first wall (11) towards the inner part of the tool holder trolley (4) so as to at least partially cover said edge (7). 10. Protection apparatus (100) according to the preceding claim, wherein the protection device (10) further comprises a third wall (17) which extends, at said end of the first wall (11) transversely with respect to the first wall (11) in the opposite direction to the second wall (15), on said third wall (17) at least one hole (18) is defined for the direct or indirect fixing of said first component (21) or of said second component (27 ). 11. Protection apparatus (100) according to one or more? of the preceding claims, further comprising at least one additional block (70) fixed on a second wall (8) of the tool carriage (4) transversal to said first wall (5), said additional block (70) having at least one hole (9) for fastening the first component (21) or the second component (26) to the tool trolley (4). 12. Machine tool (1), in particular grinding machine, characterized in that it comprises at least one protection apparatus (100) according to one or more? of the previous claims.