[0001] The subject of the present invention is a device for processing or finishing the
blades of a ski, a snowboard or the like. In the description below and in the claims,
reference is made to the use on a ski even though it is also possible to process snowboards
or the like.
[0002] In particular, the present invention relates to a device adapted for finishing the
side surface and the sliding surface of both blades of a ski by a grinding wheel.
[0003] A device is known, for processing the blades of a ski fitted on a machine adapted
for receiving the ski and automatically carrying out the blade finishing operation.
More precisely, there are provided two devices for processing the ski blades, arranged
at opposed sides with respect to the longitudinal ski development. The ski is inserted
into a seat of the machine and, by moving the ski itself along its longitudinal axis
or moving the above devices along a direction parallel to the longitudinal ski axis,
a relative translation motion is obtained between the ski and the devices in question,
which allows processing the entire blade length.
[0004] The continual evolution of the ski shape to achieve increasingly better performance
has brought to favour the so-called shaped skis, that is, wherein the width in the
direction perpendicular to the longitudinal ski length varies along the longitudinal
development itself. In other words, the ski exhibits enlarged portions at the tip
and at the tail whereas the central portion of the ski exhibits a smaller width. Consequently,
the side blade surface exhibits a curvilinear outline relative to the longitudinal
ski axis, which known devices are not always capable of finishing. Consequently, the
ski is not capable of ensuring optimum performance in terms of speed and blade grip
of the snow mantle, for example icy. In particular, the known devices are easily stuck
along the side blade surface, thereby creating an inaccurate finishing with consequent
reduced performance during the use of the skis, especially during competitions.
[0005] From what said above it is clear that there is an increasing need of making the blade
processing more effective, also in the case of skis wherein the width varies along
the longitudinal ski development and therefore the side blade surface is curvilinear.
[0006] The problem at the basis of the present invention is that of proposing a device for
processing the blades of a ski, which should exhibit such structural and functional
features as to meet the above need and overcoming the disadvantages mentioned with
reference to the prior art.
[0007] Such problem is solved by a device for processing the blades of a ski according to
claim 1. The claims depending on claim 1 relate to advantageous embodiments of the
same device.
[0008] Further features and advantages of the device for processing the blades of a ski
according to the invention will appear more clearly from the following description
of its preferred embodiments, made by way of a non-limiting example with reference
to the annexed figures, wherein:
[0009] figure 1 shows a bottom view of a ski, that is, a view showing the sliding surface
of the ski, adapted for resting on the ground during the normal use of the ski itself;
[0010] figure 2 shows the section II-II of the ski of figure 1, corresponding to the position
in which the ski is during its normal condition of use turned by 180°;
[0011] figure 3a shows an enlarged view of the detail III of figure 2 according to a first
embodiment;
[0012] figure 3b shows an enlarged view of the detail III of figure 2 according to a second
embodiment;
[0013] figures 4a-4d schematically show a top view of a ski and of a portion of a device
for processing the blades of a ski according to the present invention in different
operating conditions;
[0014] figure 5 shows a side view of the device shown in figure 4d according to arrow V
of figure 4d;
[0015] figures 6a-6c schematically show a side view of a portion of the device for processing
the blades of a ski according to the present invention in different operating conditions;
[0016] figure 7 show a substantially top view of a possible embodiment of the device for
processing the blades of a ski according to the present invention;
[0017] figure 8 shows a perspective view of the device of figure 7 according to arrow VIII;
[0018] figure 9 shows a perspective view of the device of figure 7 according to arrow IX;
[0019] figure 10 shows a perspective view of a detail of a portion of the device according
to the present invention;
[0020] figure 11 shows a vertical section view according to a possible embodiment;
[0021] figure 12 shows a vertical section view according to a possible embodiment;
[0022] figures 13 and 14 show a portion of the section of figure 11 or 12 in different operating
conditions;
[0023] figure 15 shows a side view of a portion of the device according to the present invention
adapted for processing a sliding surface of a ski blade;
[0024] figure 16 shows section XVI-XVI of figure 15;
[0025] figure 17 shows section XVII-XVII of figure 15;
[0026] figure 18 shows a perspective view of a detail of a first portion of the device according
to the present invention;
[0027] figure 19 shows a perspective view of a detail of the device according to the present
invention;
[0028] figure 20 shows a perspective partly sectioned view of a ski wherein there is highlighted
the abrasive ring of the front grinding wheel adapted for processing the sliding surface
of the blade.
[0029] With reference to the above figures, reference numeral 10 globally indicates a device
for processing the blades of a ski 12.
[0030] With reference to figure 1, there is schematically illustrated a portion of a ski
12, according to a bottom view with reference to the normal use of the ski itself.
In other words, figure 1 shows a view wherein there is shown the sliding surface of
the ski, indicated with reference numeral 12a. More in detail, figure 1 shows a bottom
view of the tip portion of a ski wherein there is highlighted the ski blade, indicated
with reference numeral 14. With reference to the normal use of the ski, the lower
surface of the blade shown in figure 1 and corresponding to the sliding surface of
the ski is indicated with reference numeral 14a. In the description below, the blade
surface indicated with reference numeral 14a will also be referred to as sliding surface.
[0031] Ski 12 conventionally develops along a longitudinal axis X-X and, as shown in figure
1, ski 12 exhibits a variable length L along the longitudinal development of the ski
itself. The variation of width L is generally such that the ski exhibits a larger
width in portions close to the tip and to the tail compared to a central portion of
the ski itself.
[0032] Figure 2 schematically shows section II-II of figure 1. Reference numeral 12b indicates
the side surfaces of the ski and reference numeral 14b indicates the side surfaces
of the blades. Finally, reference numeral 12c indicates the visible surface of the
ski, that is, the surface that during the normal use of the ski is arranged on top,
contrary to what shown in figure 2.
[0033] Figures 3a and 3b are two enlarged views of two different embodiments of the detail
indicated with III in figure 2. Figure 3a shows a conventional embodiment of ski 12,
wherein the sliding surface 14a of the blade and the sliding surface 12a of the ski
substantially lay on the same plane, provided there are no inclination of the blade
surface (indicated with a broken line). Figure 3b shows a new and advantageous embodiment
of the ski, wherein the sliding surface 14a of the blade is lowered compared to the
sliding surface 12a of the ski. In other words, between the sliding surface 12a of
the ski and the sliding surface 14a of the blade there is a step 16 so, with reference
to figure 3b, the sliding surface 14a is arranged below the sliding surface 12a of
the ski (with reference to the normal use of the ski wherein the sliding surface 12a
of the ski rests on the ground, the sliding surface 14a of the blade is on top of
the sliding surface 12a of the ski, the ski being rotated by 180° compared to figure
3b).
[0034] With reference to both figure 3a and figure 3b, a lower outside edge of the blade
is indicated with reference numeral 15a whereas an upper outside edge of the blade
is indicated with reference numeral 15b.
[0035] In other words, the advantageous embodiment of the ski (or of a snowboard) according
to what illustrated in figure 3b provides for the lowering of the blade relative to
the so-called ski base. In this way, only after processing the blade it is possible
to process the base without impairing the result of the processing performed on the
blade. Moreover, the base processing is easier since it is possible to properly process
also its edges, thanks to the presence of step 16. Finally, it has been unusually
noted that the ski or snowboard performance is improved, both in terms of grip and
in terms of speed reached.
[0036] The device 10 object of the present invention preferably is part of a machine adapted
for receiving the ski and automatically processing the sliding surfaces 14a and the
side surfaces 14b of blades 14. In particular, there are advantageously provided two
devices 10 specularly arranged on the machine so as to process the two blades of a
ski at the same time.
[0037] Figure 7 shows a top view of a portion of the machine housing ski 12 and a device
10. At the side opposed to axis X-X there is provided another device, specular to
that shown in figure 7, not shown.
[0038] The ski may be inserted into the machine with the blades arranged on top or at the
bottom according to the arrangement of device 10 onto the machine itself. By way of
an example, in the annexed drawings the ski is inserted into the machine so that the
sliding surface 12a is horizontal and arranged at the bottom, that is, as in the normal
use of the ski.
[0039] According to a possible embodiment, the ski is inserted into a seat, not shown, wherein
it is held still with devices 10 arranged at opposed sides of the ski. Each device
10 is made to move according to a direction parallel to the longitudinal development
X-X of the ski itself. In this case, it is preferable that the movement of device
10 according to the direction of axis X-X be of the controlled type with feedback,
so that the movement axis of device 10 parallel to the longitudinal axis X-X of the
ski is a controlled axis of the machine.
[0040] According to a different embodiment, the ski is seated onto rollers, not shown, and
moved along the direction of its longitudinal axis X-X relative to devices 10. Also
in this case, it is preferable that a controlled machine axis corresponds to the ski
movement along its longitudinal axis X-X.
[0041] In both cases schematically described above, the machine is structurally and functionally
adapted for realising a relative motion between devices 10 arranged at opposed sides
of the ski and the ski itself, so that each device 10 may process the ski blade along
all of its longitudinal extension. In other words, a relative motion is provided between
a device 10 and ski 12 that develops along the longitudinal axis X-X of the ski itself.
[0042] In its more general aspects, device 10 is supported on the receiving machine in a
substantially conventional manner, based on whether the ski or the device itself moves.
According to a possible embodiment, device 10 comprises a support element S operatively
associated to linear guides G. Advantageously, the support element S can move along
guides G defining a movement axis Y-Y, relative to the machine that seats the ski,
arranged transversally to axis X-X of the ski itself.
[0043] Preferably, axis Y-Y along which the support element S moves is perpendicular to
the ski development axis X-X. Moreover, axis Y-Y is preferably substantially parallel
to the sliding surface 12a of the ski. In other words, considering that the ski is
generally arranged on the machine so that the sliding surface 12a of the ski is horizontal,
axis Y-Y is a horizontal movement axis arranged perpendicularly to the ski development
axis X-X. In the description below, the term "horizontal" or "vertical" is used with
reference to the above condition of the ski on the machine.
[0044] According to a possible embodiment, an actuator A, for example a pneumatic cylinder,
is arranged between the support element S and the machine structure for carrying out
a movement for moving device 10 next to the ski along axis Y-Y.
[0045] According to a possible embodiment, device 10 comprises a first portion 10a adapted
for processing the side surface 14b of the blade. The first portion 10a is schematically
illustrated in figures 4a-4d and 5, whereas figures 7-10 show a possible embodiment.
[0046] The first portion 10a comprises a first grinding wheel 18, or side grinding wheel,
preferably of the cup grinding wheel type, wherein the abrasive surface consists of
a ring 18a. The abrasive ring 18a is flat and substantially perpendicular to an axis
of rotation a-a of the grinding wheel. The term "side grinding wheel" refers to a
grinding wheel adapted for processing the side surface 14b of the blade.
[0047] The first grinding wheel 18 is operatively associated to a motor 20 adapted for driving
it into rotation around an axis of rotation a-a.
[0048] According to a possible embodiment, with reference to a vertical plane containing
axis a-a, the axis of rotation a-a of the first grinding wheel 18 can vary its inclination
relative to a horizontal plane. In fact, if the surface to be processed is a side
surface of the blade perpendicular to the sliding surface of the ski, the axis of
rotation a-a is adapted for being arranged in a plane substantially parallel to the
sliding surface 12a of the ski, that is, in the general case in which the ski is arranged
so that its sliding surface 12a is horizontal, axis a-a is arranged in a substantially
horizontal plane. On the other hand, if the surface to be processed is a side surface
14b of the blade slightly inclined relative to the direction perpendicular to the
sliding surface 12a of the ski, the axis of rotation a-a is adapted for being arranged
slightly inclined relative to the horizontal plane. The inclination of axis a-a can
be comprised between -3 and +6 sexagesimal degrees, for example between -1 and 5 sexagesimal
degrees or in the range of 0-5 sexagesimal degrees, as it will be described hereinafter.
[0049] According to a possible embodiment, with reference to a plane containing axis a-a
arranged in horizontal or inclined direction relative to the horizontal described
above, axis a-a can move relative to direction Y-Y following the curvilinear development
of the side surface 12b of the ski, as better described hereinafter.
[0050] According to a possible embodiment, motor 20 comprises a casing 22 shaped as a box,
or grinding wheel holder spindle.
[0051] According to a possible embodiment, motor 20 is housed into a front carriage (with
reference to the ski) indicated with reference numeral 24.
[0052] According to a possible embodiment, the front carriage 24 is operatively associated
to a guide 26 on which it can be made to move along an axis Y'-Y' arranged on the
machine whereon the ski is seated so as to be substantially in the same direction
as axis Y-Y, unless provided there are no oscillations, which will be described hereinafter.
Axis Y'-Y' along which the front carriage 24 moves is perpendicular to the portion
of the side surface of the ski or of the blade that directly faces the first grinding
wheel 18 during the processing of the blade itself. Moreover, axis Y'-Y' is preferably
substantially parallel to the sliding surface 12a of the ski. In other words, considering
that the ski is generally arranged on the machine so that the sliding surface 12a
of the ski is horizontal, axis Y'-Y' is a horizontal movement axis arranged perpendicularly
to the portion of the side surface of the ski or of the blade facing directly the
first grinding wheel 18 during the processing of the blade itself. According to a
possible embodiment, axis Y'-Y' and axis a-a lay in the same vertical plane.
[0053] The front carriage 24 is schematised in figures 4a-4d and 5 to schematically show
the operation of device 10 as described below. In figure 4a, some details are outlined
because they are not directly visible whereas in the following figures, the elements
have been left in continuous line for simplicity of representation. Moreover, the
support element S is shown only in figure 4a and 5 by way of an example. According
to a possible embodiment, for example shown in figures 7-10 , the front carriage 24
comprises a lower base 24a, slidingly engaged on guide 26, and containment walls 24b,
for example connected by a traverse 24c so as to define a seat adapted for receiving
the box-shaped casing 22 of motor 20. Of course, the front carriage 24 may have any
other shape besides that just described.
[0054] According to a possible embodiment, there are provided means for changing the inclination
of axis a-a relative to the front carriage 24, and in particular, relative to the
sliding plane of the front carriage 24, that is, generally relative to the horizontal
plane. In other words there are provided means for inclining the abrasive surface
18a of the first grinding wheel 18 so as to obtain a side surface 14b of the blade
inclined relative to the direction perpendicular to the sliding surface 12a of the
ski.
[0055] According to a possible embodiment of the above means for changing the inclination
of axis a-a relative to the sliding plane of the front carriage (and therefore, relative
to the front carriage itself), motor 20 and therefore the first grinding wheel 18
are fitted on the front carriage 24 so as to rotate around an axis b-b such as to
change the inclination of the abrasive ring 18a of the first grinding wheel relative
to the side surface of the blade. Axis b-b is perpendicular to axis a-a and lays in
a horizontal plane. According to a possible embodiment, the above means for changing
the inclination of axis a-a are structured so that axis b-b lays on a chord of the
grinding wheel adapted for coming into contact with the lower outside edge 15a of
the blade. In particular, axis a-a is inclined by making it rotate around axis b-b
which coincides with the free edge or corner of the blade (figure 20). Using the blade
corner as fulcrum for adjusting the inclination of the grinding wheel (axis a-a),
it is possible to obtain an optimum control of the inclination angle of the grinding
wheel and it is possible to change such inclination while processing the ski along
its longitudinal axis, while the grinding wheel is in contact with the blade. The
ski blade processing can therefore be made automated, controlled and with feedback.
In other words, the inclination of axis a-a of the grinding wheel, that is, the adjustment
of the blade surface inclination to be obtained, is advantageously realised by rotation
around a known fulcrum, that is, by rotation around an axis that can advantageously
be a controlled processing axis, for example to be changed with substantial continuity
based on the ski area (tip, centre or tail) being processed. The grinding wheel inclination
adjustment, and therefore of the surface to be obtained, occurs while the grinding
wheel is in contact with the blade and along an interpolation portion between the
different ski areas that can require different blade angles (tip, centre, and tail),
also allowing a numerical control application of the process itself.
[0056] Advantageously, motor 20, or more preferably its grinding wheel support spindle or
casing 22, exhibit at least one arched slot 28, preferably two arched slots obtained
on opposed surfaces of the motor, or of the box-shaped casing, which develop along
an arched line 30 laying in a vertical plane. In other words, there is provided a
curvilinear block or cam that forces axis a-a of the grinding wheel to rotate around
a fulcrum consisting of the free corner of the ski blade, as described above. At least
two pins 32, preferably three pins 30 are fitted on the front carriage 24 so that
the respective longitudinal axes are substantially parallel to one another and perpendicular
to a vertical plane. The intersection points of the axes of pins 32 with a vertical
plane lay along an arched line equal to the arched line 30 along which the above slot
develops. In the coupling between motor 20 and the front carriage 24, pins 32 are
arranged so as to insert in a corresponding arched slot 28 so that the motor, and
therefore the first grinding wheel, may rotate around axis b-b (blade corner) relative
to the front carriage 24, as shown by way of an example in figures 11-14.
[0057] The means for changing the inclination of axis a-a relative to the front carriage
24 can further comprise actuating means, for example comprising an arm 34 connected
to motor 20, preferably to the grinding wheel support spindle 22, adapted for defining
a lever by which motor 20 is made to rotate. An end 34a of arm 34 is operatively associated
to adjusting means, for example comprising a threaded member 36, for raising and lowering
the end itself and thus rotate both arm 34 and motor 20. The threaded member 36 is
operatively associated to the front carriage 24 so as to move end 34a of arm 34 closer
or father relative to a portion of the front carriage itself. Some possible embodiments
of the means for changing the angulation of axis a-a are illustrated in figures 7,
8, 11-14, wherein for example arm 34 exhibits a first portion 34b fixed to motor 20,
preferably to casing 22. The first portion 34b preferably exhibits such extension
as to protrude from the front carriage 24, that is, such that one of its ends is outside
one of the containment walls 24b, if present (figure 18 shows a specular arrangement
of the first portion 34b compared to the other embodiments shown). A second portion
34c, preferably perpendicular to the first one, is fixed to the end of the first portion
34b opposed to motor 20. The second portion 34c is preferably shaped as an "L" and
defines end 34a of arm 34 operatively associated to the adjusting means. In particular,
end 34a can comprise a connecting element 38, for example shaped as a plate, connected
to the second portion 34c of arm 34 by a pin 40. A disc 42 may be fixed to the connecting
element 38, to prevent the threaded member clearance. Both the connecting element
38 and disc 42, if present, exhibit a threaded thorough seat adapted for receiving
an end of the threaded member 36. The threaded member 36 exhibits a non-threaded portion
36a by which it is fitted into an adjusting block 44 comprising a first portion 44a
fixed to the front carriage 24, preferably to a containment wall 24b, and an actuating
portion 44b preferably realised by a motor, suitably controlled and with feedback
(figure 11). According to a possible embodiment, for example shown in figures 7, 8
and 12, the actuating portion 44b is realised by a manually driven flywheel.
[0058] Inside the first portion 44a, the non-threaded portion 36a of the threaded member
36 is free to rotate on bearings 46 and exhibits an abutment plate 48. The non-threaded
portion 36a extends beyond the first portion 44a of the adjustment block and is pivoted
to the motor shaft 44b (or to the manually driven flywheel). Advantageously, there
are provided means 49 for indicating 49 the inclination of axis a-a relative to the
horizontal plane, arranged for example between the first portion 44a of the adjustment
block 44 and end 34a of arm 34.
[0059] The operation of the means for inclining axis a-a of motor 20 relative to the front
carriage 24 will be described hereinafter along with the operation of device 10.
[0060] According to a possible embodiment, device 10 further comprises a rear carriage,
with reference to the ski and to the front carriage 24, indicated with reference numeral
50. According to a possible embodiment, the rear carriage 50 is slidingly associated
to a guide, preferably the same guide 26 on which the front carriage 24 moves.
[0061] Advantageously, the rear carriage 5 can be made to move along axis Y'-Y' as defined
above for the front carriage 24.
[0062] According to a possible embodiment, the front carriage 24 and the rear carriage 50
are connected to one another by an actuator 52, preferably a pneumatic cylinder. A
further actuator 53, preferably a pneumatic cylinder, can be provided arranged between
the rear carriage 50 and guide 26.
[0063] The rear carriage 50 is schematised in figures 4a-4d and 5 to schematically show
the operation of device 10 as described below. According to a possible embodiment,
for example shown in figures 7-10, the carriage comprises a base 50a adapted for being
slidingly fitted on guide 26. Two arms 54 extend from base 50a towards the ski, or
towards the first grinding wheel 18. In other words, the rear carriage 50 advantageously
exhibits a two-prong fork shape whose ends are adapted for arranging at the side surface
of the ski to be processed. Advantageously, each arm 54 exhibits a roller or feeler
pin 56 having longitudinal axis arranged so that the two rollers may rest against
the side surface of the ski or against the side surface 14b of the ski blade. Preferably,
the axis of each roller 56 is arranged transversally, preferably perpendicularly,
to axis X-X of the ski and substantially perpendicular to the sliding surface 12a
of the ski itself. In other words, considering that the ski is generally arranged
on the machine so that the sliding surface 12a is horizontal, the two rollers 56 are
arranged vertical so as to rest against the side surface of the ski or against the
side surface 14b of the blade. Yet in other words, the first portion 10a of device
10 adapted for processing the side surface 14b of the ski blade comprises two feeler
pins 56 adapted for resting against the side surface of the ski or of the blade to
follow its outline during the relative motion between the ski and device 10 along
axis X-X of the ski itself. More in particular, it is advantageously provided that
the rear carriage 50 comprises the two feeler pins 56. The rear carriage 50 shown
in figure 10 is specular compared with the other embodiments.
[0064] According to a possible embodiment, the support element S of device 10 is operatively
connected to the front carriage 24 and to the rear carriage 50 so that both carriages
can rotate around an axis c-c relative to the support element itself, to follow the
outline of the side surface 14b of the blade during the relative motion of the ski
and of device 10 along the longitudinal axis X-X of the ski itself. Preferably, the
front carriage and the rear carriage slide on the same guide 26 and the latter is
fitted on the support element S so as to rotate around axis c-c. Axis c-c is advantageously
arranged transversally, preferably perpendicularly, to axis X-X of the ski and to
the movement axis Y-Y of the support element S. According to a possible embodiment,
axis c-c is advantageously arranged transversally, preferably perpendicularly, to
the longitudinal axis X-X of the ski and to the sliding surface 12a of the ski itself.
In other words, considering that the ski is generally seated in the machine so that
the sliding surface 12a of the ski is horizontal, axis c-c is arranged vertical so
that the front carriage 24 and the rear carriage 50 can oscillate around it in a substantially
horizontal plane.
[0065] Considering a plane substantially parallel to the sliding surface 12a of the ski,
that is, generally a horizontal plane, axis X-X defines the direction of the relative
motion between device 10 and the ski while axis Y-Y defines the sliding direction
of device 10 (and in particular, of the first portion 10a or of the support element
S) closer or farther to/from the ski perpendicularly to axis X-X. During the relative
motion between device 10 and the ski along direction X-X, the front carriage 24 and
the rear carriage 50 follow the curvilinear outline of the side ski surface thanks
to the two feeler pins 56 that make the carriages oscillate around axis c-c perpendicular
to axis X-X and to axis Y-Y. As a consequence, the movement axis Y'-Y' of the two
carriages oscillates relative to direction Y-Y, during the relative motion between
device 10 and the ski along direction X-X, remaining always perpendicular to the side
surface of the ski facing the first grinding wheel 18. Similarly, the rotation axis
a-a of the first grinding wheel oscillates around axis c-c relative to direction Y-Y,
during the relative motion between device 10 and the ski along direction X-X.
[0066] According to a possible embodiment, device 10 comprises a second portion 10b adapted
for processing the sliding surface 14a of the blade.
[0067] The second portion 10b comprises a second grinding wheel 60, or front grinding wheel,
preferably of the cup grinding wheel type, wherein the abrasive surface consists of
a ring 60a. The abrasive ring 60a is plane and arranged perpendicular to an axis of
rotation d-d of grinding wheel 60. The term "front grinding wheel" refers to a grinding
wheel adapted for processing the sliding surface 14a of the blade.
[0068] The second grinding wheel 60 is operatively associated to a motor 62 adapted for
driving it into rotation around an axis of rotation d-d. The axis of rotation d-d
is arranged transversally to the longitudinal axis X-X of the ski, preferably perpendicular
to it. Moreover, axis d-d is arranged in a plane substantially perpendicular to the
sliding surface 12a of the ski, that is, in the general case in which the ski is arranged
so that the sliding surface 12a is horizontal, axis d-d is arranged in a substantially
vertical plane.
[0069] According to a possible embodiment, with reference to the vertical plane containing
axis d-d, axis d-d can vary its inclination relative to a direction perpendicular
to the sliding surface of the ski or generally relative to a vertical direction. In
fact, if the surface to be processed is a sliding surface of the blade parallel to
the sliding surface of the ski, axis d-d is adapted for being arranged according to
a vertical direction. If the surface to be processed is a sliding surface 14a of the
blade slightly inclined, as described hereinafter, axis d-d is adapted for being arranged
slightly inclined relative to the vertical direction. The inclination of axis d-d
can be comprised between -3 and +6 sexagesimal degrees, for example in the range of
0-6 sexagesimal degrees, as it will be described hereinafter.
[0070] According to a possible embodiment, motor 62 comprises a grinding wheel support spindle
or casing 64 shaped as a box.
[0071] According to a possible embodiment, motor 62 is seated into a carriage indicated
with reference numeral 66. Advantageously, carriage 66 is slidingly fitted on a support
element. For example, carriage 66 is slidingly fitted on the same support element
S of the first portion 10a of device 10. The support element S is provided with an
upright 67 with a guide 68 along which carriage 66 can move along an axis Z-Z. Axis
Z-Z is transversal, preferably perpendicular, to the development axis X-X of the ski
and transversal, substantially perpendicular, to the sliding axis Y-Y. In other words,
carriage 66 is adapted for being moved along a vertical direction, considering the
general horizontal arrangement of the ski on the machine. An actuator 70, preferably
a pneumatic cylinder, is arranged between the support element S and carriage 66 for
raising or lowering the carriage along direction Z-Z.
[0072] According to a possible embodiment, for example shown in figures 7-9, carriage 66
comprises two side walls 66a, of which one slidingly engaged on guide 68, for example
connected by a transversal wall 66b. The two side walls 66a define a seat adapted
for receiving the box-shaped casing 64 of motor 62. Of course, carriage 66 may have
any other shape besides that just described.
[0073] According to a possible embodiment, there are provided means for changing the inclination
of axis d-d relative to carriage 66, that is, relative to the vertical direction.
In other words there are provided means for inclining the abrasive surface 60a of
the second grinding wheel 60 so as to obtain a sliding surface 14a of the blade inclined
relative to the sliding surface 12a of the ski.
[0074] According to a possible embodiment of the above means for changing the inclination
of axis d-d relative to carriage 66, motor 62 and therefore the second grinding wheel
60 are fitted on carriage 66 so as to rotate around an axis b'-b' such as to change
the inclination of the abrasive ring 60a of the second grinding wheel relative to
the side surface 14a of the blade. Axis b'-b' is perpendicular to axis d-d and parallel
to direction X-X. According to a possible embodiment, axis b'-b' lays on a chord of
the second grinding wheel 60 adapted for resting against the lower outside edge 15a
of the blade.
[0075] Advantageously, the means for changing the inclination of axis d-d relative to carriage
66 are structurally and functionally similar to those described above with reference
to the first portion 10a of device 10. In particular, axis d-d is inclined by making
it rotate around axis b'-b' which coincides with the free edge or corner of the blade
(figure 20). Using the blade corner as fulcrum for adjusting the inclination of the
grinding wheel (axis d-d), it is possible to obtain an optimum control of the inclination
angle of the grinding wheel and it is possible to change such inclination while processing
the ski along its longitudinal axis, thus obtaining a blade processing that can be
made automatic, controlled and with feedback. In other words, the inclination of axis
d-d of the grinding wheel, that is, the adjustment of the blade surface inclination
to be obtained, is advantageously realised by rotation around a known fulcrum, that
is, by rotation around an axis that can advantageously be a controlled processing
axis, for example to be changed with substantial continuity based on the ski area
(tip, centre or tail) being processed. The grinding wheel inclination adjustment,
and therefore of the surface to be obtained, occurs along an interpolation portion
between the different ski areas that can require different blade angles (tip, centre,
and tail), also allowing a numerical control application of the process itself.
[0076] Advantageously, motor 62, or more preferably its casing 64, exhibit at least one
arched slot 72, preferably two arched slots obtained on opposed surfaces of the motor,
or of the box-shaped casing, which develop along an arched line 74 laying in a vertical
plane. In other words, there is provided a curvilinear block or cam that forces axis
d-d of the grinding wheel to rotate around a fulcrum consisting of the free corner
of the ski blade, as described above. At least two pins 76, preferably three pins
76 are fitted on carriage 66 so that the respective longitudinal axes are substantially
parallel to one another and perpendicular to a vertical plane. The intersection points
of the axes of pins 76 with a vertical plane lay along an arched line equal to the
arched line 74 along which the above slot develops. In the coupling between motor
62 and carriage 66, pins 76 are arranged so as to insert in a corresponding arched
slot 72 so that the motor, and therefore the second grinding wheel, may rotate around
axis b'-b' relative to carriage 66, as shown by way of an example in figures 14-16.
[0077] The means for changing the inclination of axis d-d relative to carriage 66 can further
comprise actuating means, for example comprising an arm 78 connected to motor 62,
preferably to casing 64, adapted for defining a lever by which motor 62 is made to
rotate. An end 78a of arm 78 is operatively associated to adjusting means, for example
comprising a threaded member 80, for raising and lowering the end itself and thus
rotate both arm 78 and motor 62. The threaded member 80 is operatively associated
to carriage 66 so as to move end 78a of arm 78 closer or father relative to a portion
of the carriage itself.
[0078] A possible embodiment of the means for changing the angulation of axis d-d is illustrated
in figures 14-16, wherein for example arm 78 exhibits a fork portion 78b fixed to
motor 62, preferably to casing 64, by threaded elements. The fork portion 78b defines
the end 78a of arm 78 operatively associated to the adjusting means. In particular,
end 78a can comprise a connecting element 84, for example shaped as a plate, connected
to the prongs of the fork portion 78b by pins 86. A disc 88 may be fixed to the connecting
element 84, to prevent the threaded member clearance. Both the connecting element
84 and disc 88, if present, exhibit a threaded thorough seat adapted for receiving
an end of the threaded member 80. The threaded member 80 exhibits a non-threaded portion
80a by which it is fitted into an adjusting block 90 comprising a first portion 90a
fixed on two sides to carriage 66, preferably to the side walls 66a, and an actuating
portion 90b. According to a possible embodiment, the actuating portion 90b is realised
by a manually driven flywheel. According to a possible embodiment, not shown, the
actuating portion 90b is realised by a motor suitably controlled and with feedback,
similarly to what shown in figure 11 with reference to the first portion 10a of device
10.
[0079] Inside the first portion 90a of the adjusting block, the non-threaded portion 80a
of the threaded member 80 is free to rotate on bearings 92 and exhibits an abutment
plate 94. The non-threaded portion 80a extends beyond the first portion 90a of the
adjustment block and is pivoted to the motor shaft 90 (or to the manually driven flywheel).
Advantageously, there are provided means 95 for indicating 49 the inclination of axis
d-d relative to the horizontal plane, arranged for example between the first portion
90a of the adjustment block 90 and end 78a of arm 78.
[0080] The operation of the means for inclining axis d-d of motor 62 relative to carriage
66, similar to that of the means for changing the inclination of axis a-a of motor
20, will be described hereinafter along with the operation of device 10.
[0081] According to a possible embodiment, a feeler pin or pin 96 is fitted with vertical
axis at the end of an arm 98 in turn fitted on the support element S, preferably on
upright 67. The feeler pin 96 is arranged so as to rest against the side surface of
the ski or against the side surface 14b of the blade. In other words, the second portion
10b of device 10 adapted for processing the sliding surface 14a of the ski blade comprises
a feeler pin 96 adapted for resting against the side surface of the ski or of the
blade for following its outline during the relative motion between the ski and device
10 along direction X-X.
[0082] Advantageously, feeler pin 96 is arranged at an inside portion of the cup grinding
wheel 60, so that the abrasive ring 60a of the cup grinding wheel exhibits an outside
edge 60b substantially at the edge 100 delimiting the sliding surface 14a of the blade
and the sliding surface 12a of the ski (figure 20) or in any case comprised between
the delimiting edge 100 and the lower outside edge 15a of the blade.
[0083] In other words, the feeler pin defines a means for limiting the processing area of
the grinding wheel so that, especially in the case of a ski with lowered blade as
shown in figure 3b, it is possible to process the blade without involving the base.
[0084] According to a possible embodiment, arm 98 that supports the feeler pin 96 is made
of two parts. A first part 98a is fastened to upright 67 of the support element S,
for example by threaded connections, and it exhibits a fork shape. A second part 98b
is fitted on the first part 98a by a pin 99a and on a threaded element 99b to adjust
its position relative to the grinding wheel abrasive ring.
[0085] Advantageously, the above embodiment is especially adapted for processing blades
that are lowered compared to the ski, that is, blades realised according to figure
3b.
[0086] Even more advantageously, thickness s of the abrasive ring of the second grinding
wheel 60 is smaller than width 1 of the sliding surface 14a of the blade, thereby
allowing an even easier processing of lowered blades as illustrated for example in
figure 3b (figure 20). In particular, the presence of feeler pin 96 and the provision
of a grinding wheel with thickness s smaller than width 1 of the blade contribute
to limiting the grinding wheel processing only to the blade without interfering with
the base in case of conventional skis and allowing optimum blade processing in case
of skis with lowered blade, without any interference with step 16.
[0087] The support element S with reference to the second portion 10b of device 10 is schematised
in figures 10 6a-6c to schematically show the operation of device 10 as described
below.
[0088] Below is the description of the operation of a device for processing the blades of
a ski according to the present invention.
[0089] With reference to the first portion 10a of device 10, that is, to the portion adapted
for processing the side surface of the blade, the operation is schematically illustrated
in figures 4a-4d and 5.
[0090] The ski is arranged on the machine seating two devices 10 arranged specularly at
opposed sides of the ski relative to axis X-X for processing the two blades at the
same time. Based on the type of machine, the ski or the devices 10 are moved along
a direction X-X so as to create a relative motion between the ski and the devices
themselves to process the blade along its entire extension.
[0091] In the description below, reference is made to the operation of a device since the
other one has a similar operation.
[0092] Starting from a condition in which the support element S has reached the working
position along direction Y-Y, the front carriage 24 and the rear carriage 50 move
from a rest position (figure 4a) to a sided position (figure 4b) wherein the feeler
pins 56 come into contact with the side surface of the ski. In the relative movement
between the ski and the first portion 10a of device 10, the feeler pins 56 follow
the curvilinear outline of the side ski surface due to the variation of width L along
axis X-X (figures 4b-4c). Following the contact between the feeler pins 56 and the
side ski surface, the rear carriage 50 and therefore also the front carriage 24 oscillate
around axis c-c in a substantially horizontal plane.
[0093] To perform the processing of the side surface of blade 14b, the front carriage 24
is made to move forward relative to the rear carriage 50 by the actuator 52 (figure
4d). The further actuator 53 ensures constant contact between the feeler pins 56 and
the side ski surface.
[0094] The inclination of axis a-a of the first grinding wheel 18 is changed by screwing
the threaded member 36 by the flywheel or preferably by motor 44b suitably controlled
and with feedback to follow the inclination of the side surface of the blade during
the ski processing (figures 11-14). By screwing or unscrewing the threaded member
36, arm 34 is raised or lowered and consequently motor 20 rotates, sliding on pins
32. The advantageous provision of an arched slot sliding on pins, substantially acting
as a cam, allows setting such an axis of rotation b-b of the grinding wheel as to
abut on the lower outside edge 15a of the blade, that is, on the intersection of the
two useful surfaces of the blade. Such movement of the grinding wheel axis allows
adjusting the grinding wheel angle during processing, keeping the grinding wheel in
contact with the ski. In fact, the fulcrum is kept on the outside corner of the blade
and the grinding wheel rotates, optionally suitably controlled, during the relative
motion between the ski and device 10 to optionally generate different inclinations
of the blade between the tail portion, the central one and the tip portion of the
ski.
[0095] With reference to the operation of the second portion 10b, that is, to the portion
adapted for processing the sliding surface 14a of the blade, figure 6a-6c schematically
shows the support element S in come processing stages. From a rest condition (figure
6a), the support element is moved along the direction Y-Y close to the ski to be processed.
The position of the grinding wheel along direction Z-Z is defined by actuator 70 and
the sliding of carriage 66 along guide 68 of the support element S. The support element
S therefore moves forward along direction Y-Y until the feeler pin 96 comes into contact
with the side ski surface (figure 6b). Carriage 66 is therefore raised along guide
68, moving the second grinding wheel 60 in contact with the sliding surface of the
blade (figure 6c). The inclination of the second grinding wheel 60, that is, of axis
d-d, is carried out by screwing or unscrewing the threaded member 80 by the flywheel
or more preferably by the controlled command of the motor defining the actuating portion
90b. The advantageous provision of an arched slot sliding on pins, substantially adapted
for acting as a cam, allows setting such an axis of rotation b'-b' of the grinding
wheel substantially coinciding with the lower outside edge 15a of the blade, that
is, with the intersection between the two useful surfaces of the blade. Such movement
of the grinding wheel axis allows adjusting the grinding wheel angle during processing,
keeping the grinding wheel in contact with the ski. In fact, the fulcrum is kept on
the outside corner of the blade and the grinding ewheel rotates, optionally suitably
controlled, during the relative motion between the ski and device 10 to optionally
generate different inclinations of the blade between the tail portion, the central
one and the tip portion of the ski.
[0096] From what said above it can be noted that the provision of a device for processing
the blades of a ski according to the present invention allows processing also curvilinear
side surfaces carefully as in the case of skis whose width varies along the longitudinal
ski development. The advantageous provision of feeler pins, and in particular of two
feeler pins arranged opposed to the grinding wheel, forces the grinding wheel and
the motor to follow the curvilinear outline of the side surface of the blade. The
oscillation around the vertical axis c-c of the motor is generated and controlled
by the feeler pins themselves kept in constant contact with the ski blade, thanks
to the actuator 53. The advantageous provision of two carriages, one adapted for supporting
the motor and the other adapted for supporting the feeler pins, allows moving the
two carriages relatively, dividing the step of siding and positioning the device on
the ski from the step of beginning of the processing or finishing with the grinding
wheel moving close to the blade.
[0097] Thanks to the provision of at least one feeler pin, preferably two, realised structurally
independent from the grinding wheel, it is possible to prevent the device from being
stuck along the surface to be processed, and therefore the risk of steps formed on
the side blade surface is prevented.
[0098] The provision of a movement of adjustment of the inclination of the grinding wheel
axis allows choosing the best inclination of the surface of the blade to be processed.
Moreover, the original provision of realising such adjustment movement by a controlled
motor with feedback, optionally along with the provision of controlling the movement
axis of the ski relative to the device or vice versa, allows obtaining the correct
inclination of the blade along the entire development axis of the ski X-X.
[0099] It is clear that variants and/or additions to the description above may be provided.
For example, the two portions 10a and 10b can also be provided independently from
one another. Moreover, the means for changing the inclination of the axis of rotation
of the grinding wheel can be applied to any type of grinding wheel adapted for processing
a surface of a ski blade.
[00100] In order to meet special requirements, a man skilled in the art will be able to make
several changes, adaptations and replacements of elements with other functionally
equivalent ones in the preferred embodiment described above, without departing from
the scope of the following claims.
1. Device (10) for processing the blades (14) of a ski (12) or snowboard which develops
according to a longitudinal axis (X-X), said device (10) and said ski (12) being adapted
for moving, one relative to the other, in a relative movement along a direction substantially
parallel to the development axis (X-X) of the ski, said device comprising at least
one portion (10a) adapted for processing a side surface (14b) of a blade (14) and
provided with a side grinding wheel (18) operatively associated to a motor (20), said
motor and said grinding wheel being capable of oscillating around an axis (c-c) during
the relative movement between the device (10) and the ski (12) to follow the curvilinear
outline of the side surface (14a) of the blade relative to the development axis of
the ski (X-X), wherein said device (10) comprises at least one feeler pin (56) adapted
for coming into contact with the side surface of the ski or of the blade to follow
the curvilinear outline of the side surface of the ski or of the blade along the development
axis of the ski (X-X) and cause the oscillation of the motor (20) and of the side
grinding wheel (18) around the axis (c-c).
2. Device according to claim 1, wherein said side grinding wheel (18) is a cup grinding
wheel rotating around an axis (a-a) arranged transversally to the side surface (14b)
of the blade.
3. Device according to claim 1 or 2, wherein there are provided two feeler pins (56)
arranged at opposed sides of the side grinding wheel (18) along the development direction
of the ski (X-X).
4. Device according to one of the previous claims, wherein said axis (c-c) around which
said motor (20) and said grinding wheel (18) oscillate during the relative movement
between the device (10) and the ski (12) is arranged according to a vertical direction,
said ski comprising a sliding surface (12a) arranged in a horizontal plane during
the blade processing.
5. Device according to any one of the previous claims, wherein said motor (20) and said
side grinding wheel (18) are operatively associated to a rear carriage (50) on which
said at least one feeler pin (56) is fitted.
6. Device according to claim 5, wherein said rear carriage (50) is adapted for being
slidingly associated to a guide (26) for moving along an axis (Y'-Y') to move closer
or farther from the ski, said axis (Y'-Y') being adapted for oscillating around axis
(c-c) relative to an axis (Y-Y) perpendicular to the development direction (X-X) of
the ski and parallel to a sliding surface (12a) of the ski itself.
7. Device according to claim 6, wherein said rear carriage (50) comprises a base (50a),
adapted for being slidingly mounted on the guide (26), and two arms (54) extending
from the base (50a) towards the side grinding wheel (18), each of said arms supporting
a roller or a feeler pin (56) having longitudinal axis arranged so that the two rollers
can rest against the side surface of the ski or against the side surface (14b) of
the ski blade.
8. Device according to claim 7, wherein said arms (54) are arranged at opposed sides
of the side grinding wheel (18) along the development direction (X-X) of the ski (12).
9. Device according to claim 7 or 8, wherein the axis of each roller (56) is adapted
for being arranged perpendicular to the ski axis (X-X) and substantially perpendicular
to the sliding surface (12a) of the ski itself.
10. Device according to one of claims from 6 to 9, wherein said rear carriage (50) and
said guide (26) are adapted for being fitted on a support element (S) of a machine
for processing ski blades arranged at a side of a seat for the ski so as to oscillate
around said axis (c-c).
11. Device according to any one of claims from 5 to 10, wherein the motor (20) is seated
in a front carriage (24) adapted for moving relative to the rear carriage (50) according
to a direction (Y'-Y') moving closer to or farther from the ski.
12. Device according to claim 11, wherein said front carriage (24) is slidingly associated
to a guide (26) along which it can be made to move along said axis (Y'-Y') moving
closer to or farther from the ski.
13. Device according to claim 12 when depending on claim 6, wherein the front carriage
(24) and the rear carriage (50) are slidingly associated to the same guide (26) and
the latter is adapted for being fitted on a support element (S) of a machine for processing
ski blades so as to rotate around the axis (c-c).
14. Device according to any one of claims from 11 to 13, wherein between the front carriage
(24) and the rear carriage (50) there is provided an actuator (52), preferably a pneumatic
cylinder, for moving the front carriage (24) relative to the rear carriage (50).
15. Device according to claim 13 or 14, wherein a further actuator (53), preferably a
pneumatic cylinder, is provided arranged between the rear carriage (50) and the guide
26.
16. Device according to one of claims from 12 to 15, wherein the front carriage (24) comprises
a lower base (24a), slidingly engaged on the guide (26), and containment walls (24b),
for example connected by a traverse (24c) so as to define a seat adapted for receiving
the motor (20).
17. Device according to one of claims from 11 to 16, wherein the grinding wheel (18) is
operatively associated to the motor (20) adapted for driving it into rotation around
an axis of rotation (a-a) and wherein there are provided means for changing the inclination
of the axis (a-a) relative to the front carriage (24) adapted for inclining the abrasive
surface (18a) of the side grinding wheel (18) so as to obtain a side surface (14b)
of the blade, orthogonal or inclined relative to the direction perpendicular to the
sliding surface (12a) of the ski.
18. Device according to claim 17, wherein the motor (20) and the side grinding wheel (18)
are fitted on the front carriage (24) so as to rotate around an axis (b-b) to change
the inclination of the abrasive ring (18a) of the side grinding wheel (18) relative
to the side surface (14b) of the blade.
19. Device according to claim 18, wherein said means for changing the inclination of the
axis (a-a) are structured so that the axis (b-b) lays on a chord of the grinding wheel
adapted for coming into contact with a lower outside edge (15a) of the blade.
20. Device according to claim 19, wherein the motor (20) exhibits at least one arched
slot (28), which develops along an arched line (30) which lays in a plane perpendicular
to the sliding surface (12a) of the ski, e and wherein three pins (32) are fitted
on the front carriage (24) so that the respective longitudinal axes are substantially
parallel to one another and perpendicular to the plane on which the arched slot (30)
lays and the intersection points of the axes of the pins (32) with said plane lay
along an arched line equal to the arched line (30) along which the above slot develops.
21. Device according to claim 20, wherein in the coupling between the motor (20) and the
front carriage (24), the pins (32) are arranged so as to insert in a corresponding
arched slot (72) so that the motor, and therefore the side grinding wheel, may rotate
around the axis (b-b) relative to the front carriage (24).
22. Device according to claim 20 or 21, wherein said means for changing the inclination
of the axis (a-a) relative to the front carriage (24) further comprise actuating means.
23. Device according to claim 22, wherein said actuating means comprise an arm (34) connected
to the motor (20) adapted for defining a lever by which the motor (20) is made to
rotate.
24. Device according to claim 23, wherein an end (34a) of the arm (34) is operatively
associated to adjusting means comprising a threaded member (36) operatively associated
to the front carriage (24) for raising and lowering the end itself and thus rotate
both the arm (34) and the motor (20).
25. Device according to claim 24, wherein the arm (34) exhibits a first portion (34b),
fixed to the motor (20) and exhibiting such extension as to protrude from the front
carriage (24), and a second portion (34c) fixed to the end of the first portion (34b)
opposed to the motor (20).
26. Device according to claim 25, wherein the second portion (34c) is shaped as an "L"
and defines the end (34a) of the arm (34) operatively associated to the adjusting
means.
27. Device according to claim 26, wherein the end (34a) comprises a connecting element
(38) connected to the second portion (34c) of the arm (34) by a pin (40).
28. Device according to claim 27, wherein a disc (42) is fixed to the connecting element
(38), both the connecting element (38) and the disc (42) exhibiting a threaded thorough
seat adapted for receiving an end of the threaded member (36).
29. Device according to claim 28, wherein the threaded member (36) exhibits a non-threaded
portion (36a) by which it is fitted in an adjustment block (44) comprising a first
portion (44a) fixed to the front carriage (24), and an actuating portion (44b).
30. Device according to claim 29, wherein the actuating portion (44b) is realised by a
suitably controlled motor with feedback.
31. Device according to claim 29 or 30, wherein there are provided means (49) for indicating
the inclination of the axis (a-a) relative to a plane parallel to the sliding surface
(12a) of the ski.
32. Machine for processing the blades (14) of a ski (12) comprising:
a seat for receiving a ski which develops along a longitudinal axis (X-X),
at least one device (10) for processing the blades (14) of a ski (12) arranged on
a side of the seat relative to the axis (X-X),
means for generating a relative movement between the ski (12) and the device (10)
along a direction substantially parallel to the development axis (X-X) of the ski,
said device comprising at least one portion (10a) adapted for processing a side surface
(14b) of a blade (14) and provided with a side grinding wheel (18) operatively associated
to a motor (20), said motor and said grinding wheel being capable of oscillating around
an axis (c-c) during the relative motion between the device (10) and the ski (12)
to follow the curvilinear outline of the side surface (14a) of the blade relative
to the development axis of the ski (X-X), wherein said device (10) comprises at least
one feeler pin (56) adapted for coming into contact with the side surface of the ski
or of the blade to follow the curvilinear outline of the side surface of the ski or
of the blade along the development axis of the ski (X-X) and cause the oscillation
of the motor (20) and of the side grinding wheel (18) around the axis (c-c).
33. Device according to claim 32, wherein said axis (c-c) around which said motor (20)
and said grinding wheel can oscillate is orthogonal to the sliding surface (12a) of
the ski seated into the machine.
34. Device according to claim 33, wherein the ski seat is adapted for receiving the ski
itself so that the sliding surface (12a) is parallel to a horizontal plane and wherein
said axis (c-c) around which said motor (20) and said grinding wheel (18) can oscillate
is a vertical axis.
35. Machine according to claim 33 or 34, wherein said first portion (10a) of the device
(10) is fitted on a support element (S) fitted on the machine so as to move along
an axis (Y-Y) perpendicular to the axis (X-X) of development of the ski and parallel
to the sliding surface (12a) of the ski.
36. Machine according to claim 35, wherein said first portion (10a) of the device (10)
is slidingly fitted on a guide (26) along an axis (Y'-Y') perpendicular to the portion
of the side surface of the blade being processed, said guide (26) being fitted on
said support element (S) so as to oscillate around said axis (c-c) arranged perpendicularly
to the development axis (X-X) of the ski and to the movement axis (Y-Y) of the support
element (S).
37. Machine according to claim 36, wherein said first portion (10a) of the device (10)
comprises a front carriage (24) and a rear carriage (50) independently sliding on
the guide (26) along the axis (Y'-Y') moving closer and farther from the ski.
38. Machine according to claim 37, wherein said rear carriage (50) comprises two feeler
pins (56) arranged at opposed sides of the side grinding wheel (18) relative to the
development axis (X-X) of the ski.