EP1952858B1 - Device for treating the base of a ski - Google Patents

Abstract

Device for improving the running surface coating of a ski (1) comprises distributing channels (19) which originate from a melting chamber (16) and outflow valves (20) which are actuated via pressure tappets (25) placed on the running surfaces of the ski. The melting chamber is connected to a guide (14) for the coating material having a unit (15) for melting the coating material. Preferred Features: The device has a sliding shoe (6) with a heating unit (31) for the melting chamber. The melting chamber consists of a hole (17) closed on both sides and running in the direction of the application width.

Description

The invention relates to a device for repairing the tread covering of a ski with a sliding in the ski longitudinal direction relative to the tread sliding shoe comprising a means for melting a shoe material supplied to the thermoplastic lining material and distributed over the application width, opening in the region of a distributor surface distribution channels for the melt , wherein the distributor surface is delimited by a scraper downstream of the distributor channels in the direction of displacement.

For repairing the tread of a ski it is known ( EP 0 367 684 B1 ), to provide a sliding shoe, which is moved over the running surface along the ski and on the tread a thermoplastic coating material in the form of a melt applied immediately after application and cooling by means of a scraper is withdrawn, so that the applied coating material exclusively in the to be filled wells of the tread surface remains. In order to achieve a uniform application of the lining material on the running surface, the covering material supplied in wire form to the sliding shoe is melted by means of a heating device surrounding the wire guide and the melt is fed to the running surface via distribution channels adjoining the wire guide, in the region of a distributor surface opposite the running surface , between which and the running surface results in a thin gap filled with melt, which is delimited by a scraper following in the direction of displacement of the sliding block the distribution channels. A disadvantage of this known device is especially that for melting the lining material a comparatively high heating power is required so that a sufficient supply of melt can be ensured even at higher feed speeds of the shoe. However, high heating capacities bring the risk of overheating of the lining material used with it. In addition, the discharge amount of the melt can not be adjusted depending on the respective ski width to the respective requirements. In this context, it should be remembered that monoskiers, such as snowboards, can have a width that exceeds twice the width of a conventional alpine ski.

In addition, it is known for applying wax to the tread of a ski ( DE 25 49 376 A1 . US 4 334 793 A ) to provide a sliding shoe with a melt chamber, emanating from the distribution channels to one of the running surface de ski opposite distribution surface. The distribution channels are provided with spout valves which can be actuated via pressure tappets placed on the running surface of the ski. The disadvantage, however, is that the ski wax is either liquid to introduce into the melt chamber ( US 4 334 793 A ) or must be liquefied in the melt chamber by means of a gas heater ( DE 25 49 376 A1 ), which in turn brings the risk of overheating, especially since the melt chamber can only be filled batchwise with wax.

The invention is therefore based on the object, a device for repairing the tread covering a ski of the type described in such a way that the associated with overheating of the lining material disadvantages can be avoided without having to provide an elaborate scheme for this.

The invention achieves the stated object in that the distribution channels emanate from at least one melt chamber and discharge valve, which can be actuated by applying pressure on the tread of the ski plunger, and that the melt chamber to one with the device provided for melting the lining material guide provided for the lining material.

With the known provision of a melt chamber in the region of the sliding shoe, a buffer is created for the melt, despite a different demand for melt to be dispensed a largely uniform supply of the processing material to be melted, whether in wire form, be it in the form of granules allowed so that an essential prerequisite for melting the lining material without overheating hazard can be met. As is also known, the outflow valves in the distribution channels emanating from such a melt chamber provide for a discharge amount of the melt adapted to the respective width of the ski to be treated, because only those distribution channels are opened whose outflow valves are actuated via the pressure rams provided for this purpose, when the over the distributor surface of the shoe protruding plunger when placed on the running surface of the ski during the relative displacement of the shoe against the ski against the force of a closing spring of the respective spill valve are moved and the valve is opened according to this travel.

Provided with the means for melting the lining material guide for the lining material ensures even at a relatively low receiving volume of the melt chamber independent of the discharge temperature for the outflowing melt, especially if the shoe has an additional heater for the melt chamber. The device for melting the lining material in the opening into the melt chamber guide may consist of a preferably electric heater. Particularly advantageous conditions arise, however, when the device for melting the lining material in the guide comprises a screw extruder, which may optionally be additionally heated.

For the provision of a melt chamber, various constructional measures can be taken in the shoe. A preferred construction, however, is obtained in that the melt chamber consists of a hole in the sliding shoe which runs in the direction of the application width and is closed at both ends, from which the distribution channels emerge as radial stub lines. Such a melt chamber formed by a bore not only brings favorable manufacturing conditions with it, but also allows a parallel arrangement of the distribution channels with an at least approximately perpendicular to the distribution surface axis and thus a corresponding direction of movement of the plunger for actuating the discharge valves, which can be ranked comparatively close together to allow a sufficiently sensitive adaptation to the respective ski width.

So that different coating materials can be used, for example, a dark coating material for a dark tread coating and a colorless, transparent for colored tread coatings without having to accept in a transition phase, a mixture of the coating materials, it can be provided that the shoe two melt chambers with each in Having associated distributor surfaces opening distribution channels, that the two melt chambers associated distributor surfaces with each other include an obtuse angle and that the shoe is pivotally mounted according to the supplement angle to this angle. As a result of these measures, one melt chamber can be charged with the one and the other melt chamber with the other lining material, these different lining materials being applied to the running surface of a ski via separate distributor surfaces. To ensure the optional use of these distributor surfaces, the distributor surfaces are inclined relative to each other at an obtuse angle, so that it is necessary to use one of these distributor surfaces of a pivoting of the shoe, namely the supplement angle to the mutual inclination angle. Because of the distribution channels secured by discharge valves, there can be no unintentional loss of melt in the area of the freed distribution area. Be the two distribution areas At their ends facing each other delimited by the scrapers, so opposite directions of the shoe against the ski are required for the use of the two distribution surfaces. This can be used to edit skis one after the other in the opposite direction, which makes it unnecessary to return the shoe to a predetermined starting position by means of an idle stroke. In this case, it may be useful to feed both melt chambers with a matching lining material. The scrapers in the region of the mutually facing ends of the two distributor surfaces also bring the constructive advantage that the scrapers of the two distributor surfaces can be formed by a common scraper blade.

Fig. 1

eine erfindungsgemäße Vorrichtung zum Ausbessern eines Laufflächenbelages eines Skis in einer vereinfachten Seitenansicht,

Fig. 2

diese Vorrichtung in einem Längsschnitt durch den Gleitschuh in einem größeren Maßstab,

Fig.3

einen Schnitt nach der Linie III-III der Fig. 2. in einem kleineren Maßstab und

Fig. 4

eine der Fig. 2 entsprechende Darstellung einer Konstruktionsvariante einer erfindungsgemäßen Vorrichtung.

In the drawing, the subject invention is shown in one embodiment. Show it

Fig. 1

a device according to the invention for repairing a tread covering of a ski in a simplified side view,

Fig. 2

this device in a longitudinal section through the shoe on a larger scale,

Figure 3

a section along the line III-III of Fig. 2 , on a smaller scale and

Fig. 4

one of the Fig. 2 corresponding representation of a design variant of a device according to the invention.

How the particular Fig. 1 can be removed, the device for repairing the tread of a ski 1 according to the illustrated embodiment, a frame 2 with a clamping device 3 for the ski 1, the end supports 4 and between these end supports 4 center pads 5 comprises. While the end support for the ski tip is fixedly mounted in the frame 2, the end support 4 for the ski end and the middle supports 5 can be adjusted in the ski longitudinal direction to allow adaptation to different ski lengths. The intended for the repair work of the tread lining shoe 6 is arranged in a along a guide 7 of the frame 2 movable carriage 8, the feed drive designated 9. The shoe 6 is mounted in the carriage 8 via a pivot lever 10 of height adjustable, which is hinged to a pivot cylinder 11. For feeding the sliding shoe 6 with a thermoplastic lining material, two supply spools 12 and 13 for a plastic wire are provided on the carriage 8, which is fed to the sliding shoe 6 with the aid of a feed device, which is not known for reasons of clarity.

According to the Fig. 2 and 3 the guide 14 connected to the sliding shoe 6 for the wire-shaped covering material is enclosed by a device 15 designed as an electric heater for melting the covering material. In contrast to known devices of this type, the guides 14 open for the lining material not in distribution channels, but in a melt chamber 16, which is preferably formed as over the application width of the shoe 6 extending bore 17 which is closed by plugs 18 end. The proposed distribution channels 19 are formed as parallel, radially extending to the bore 17 branch channels, which are completed by means of discharge valves 20. These outflow valves 20 have a valve body 22 which is loaded by a closing spring 21 and which forms a pressure plunger 25 projecting over a distributor surface 23 or 24 of the sliding shoe 6. The plunger 25 and the valve body 22 can also be summarized in the form of a ball valve.

In the in the Fig. 2 shown working position of the shoe 6 is pressed by means of the pivot cylinder 11 to the running surface of the ski 1 and is based on the one hand via a roller 26 and on the other hand via a scraper 27 on the tread of the ski 1 from. The scraper 27 limits the distributor surface 23 of the sliding shoe 6 with respect to the advancing direction 28 of the sliding shoe 6 behind the outflow valves 20, so that the melt emerging from the melt chamber 17 via the outflow valves 20 onto the running surface of the ski 1 in the gap between the distributor surface 23 and the running surface of the runner Skis 1 distributed over the ski width and the superfluous covering material is subsequently removed with the help of the scraper 27 again. As the plunger 25 of the discharge valves 20 displaced when placed on the running surface of the ski 1 against the force of the closing spring 21 and thus the valve body 22 are displaced to release the mouth opening of the discharge valves 20, flows only through those distribution channels 19, the pressure rams 25 sit on the ski 1, Melt on the tread of the ski 1 off, like this one Fig. 3 can be removed. The distribution channels 19 located outside the running surface of the ski 1 remain closed, so that a simple adaptation of the amount of lining material to be applied to the running surface to the respective ski width or to the ski run is possible by the independent control of the melt discharge via the discharge valves 20 actuated by the pressure ram 25 becomes. This means having one in the Fig. 3 illustrated sliding shoe 6 either a single ski 1 or a pair of skis can be edited. But it is also possible to edit a wider monoski, such as a snowboard.

Of the Fig. 2 It can be seen that the sliding block 6 has two separate melt chambers 16 which have separate guides 14 for the unwound from the supply reels 12 and 13, wire-shaped covering material. These melt chambers 16 are associated with separate distribution surfaces 23 and 24 which are inclined at an obtuse angle to each other. By pivoting the sliding shoe 6 by the supplement angle to this angle of inclination between the distributor surfaces 23 and 24, one of the distributor surfaces can optionally be used. In the illustrated embodiment, the two distributor surfaces 23 and 24 associated scraper 27 are provided at the mutually facing ends of the distributor surfaces 23 and 24, so that the working direction for the two distributor surfaces 23 and 24 runs in opposite directions. This means that the sliding shoe 6 in the indicated feed direction 28 can apply coating material over the distributor surface 23 and in the opposite direction of displacement of the carriage 8 via the distributor surface 24, which makes a return stroke for returning the carriage 8 to a starting position superfluous. The pivoting of the shoe 6 by the supplement angle to the mutual inclination angle of the distributor surfaces 23 and 24 can by a pivot cylinder 29th be performed, which is provided in the carriage 8. With the help of an additional pivoting cylinder 30, it is also possible to adjust the inclination of the shoe 6 in the respective working position relative to the ski 1 in order to take into account, for example, the blade curvature of the ski 1.

The possibility of bringing spatially separated distribution areas 23 and 24 into use permits the optional use of different covering materials, so that the supply reel 12 can be provided, for example, with a dark wire-like covering material and the supply reel 13 with a transparent covering material. But it is also possible to use the same covering materials for both distribution surfaces 23 and 24, if only one idle stroke of the carriage 8 should be avoided.

Since the provision of two separate melt chambers 16 under certain circumstances there is the danger that the melt bath in the unused distribution area associated cooling chamber cools to an impermissible extent, for the melt chambers 16, a heater 31, for example in the form of a heating element, are provided is arranged in the shoe 6 between the distribution channels 19 and thus also ensures a corresponding heating of the melt in the region of the distribution channels 19.

Again Fig. 2 can be removed, brings the arrangement of the wiper 27 in the region of the mutually facing ends of the distributor surfaces 23 and 24 with the possibility to form the wiper 27 for both distributor surfaces 23, 24 by a common wiper strip 32. Due to the necessary pivoting of the sliding block 6 between the two working positions for the distributor surfaces 23 and 24 results in the two working positions a comparable support of the shoe 6 on the one hand on the outflow valves 20 downstream in the feed direction scraper 27 and on the other hand via the outflow valves 20 upstream rollers 26th To the gap between the used distributor surface 23, 24 and To adapt the tread of the ski 1 to different conditions, the rollers 26 can be mounted on an eccentric shaft, so that by rotation of the eccentric shaft, the axis of rotation of the roller 26 is displaced accordingly.

In order to detect the shift position of the carriage 8 relative to the ski 1 and to be able to use the control, the carriage can be assigned a corresponding sensor 33, via which, for example, the ski end can be indicated or a path-dependent control intervention can be initiated.

Unlike the Fig. 2 is after the Fig. 4 the device 15 is designed to melt the lining material in the form of screw extruders 34 whose housings are part of the guide 14, through which the lining material arrives at the melt chambers 16. These screw extruders 34 have the advantage that the melting of the lining material can be carried out largely independently of the conveying speed of the lining material under constant temperature conditions.

Claims (7)

1. Apparatus for improving the running surface coating of a ski (1) having a sliding shoe (6) which can be displaced relative to the running surface coating in the ski longitudinal direction and includes a device (15) for melting a thermoplastic coating material which can be applied to the sliding shoe (6) and also distribution channels (19) for the melt which are distributed over the application width and which open in the region of a distribution surface (23), wherein the distribution surface (23) is delimited by a stripper (27) disposed downstream of the distribution channels (19) in the displacement direction (28), characterised in that the distribution channels (19) emanate in a manner known per se from at least one melt chamber (16) and comprise outflow valves (20) which can be actuated via pressure tappets (25) located on the running surface of the ski (1), and in that the melt chamber (16) is connected to a guide (14) for the coating material which is provided with the device (15) for melting the coating material.
2. Apparatus as claimed in Claim 1, characterised in that the sliding shoe (6) comprises a heating device (31) for the melt chamber (16).
3. Apparatus as claimed in Claim 1 or 2, characterised in that the device for melting the coating material in the guide (14) includes a screw extruder.
4. Apparatus as claimed in any one of Claims 1 to 3, characterised in that the melt chamber (16) consists of a bore (17) in the sliding shoe (6), which bore extends in the direction of the application width and is closed at both ends and from which the distribution channels (19) emanate as radial branch lines.
5. Apparatus as claimed in any one of Claims 1 to 4, characterised in that the sliding shoe (6) comprises two melt chambers (16) each having distribution channels (19) opening in associated distribution surfaces (23, 24), in that the distribution surfaces (23, 24) associated with the two melt chambers (16) together form an obtuse angle, and in that the sliding shoe (6) is mounted so as to be pivotable with respect to this angle corresponding to the adjacent angle.
6. Apparatus as claimed in Claim 5, characterised in that the two distribution surfaces (23, 24) are delimited at their mutually facing ends by the strippers (27).
7. Apparatus as claimed in Claim 6, characterised in that the strippers (27) of the two distribution surfaces (23, 24) are formed by a common stripping strip (32).

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