EP3278928A2 - Device for grinding and/or polishing a cutting tool - Google Patents

Abstract

Device for grinding and / or polishing a cutting tool, preferably a household knife, comprising: a device body (2); - An axis in the device body (2) rotatably mounted axis (3); - A first and a second substantially circular disc (4, 5) which are connected to the rotatable shaft (3) such that when the device body (2) along a surface, preferably a table surface, is pulled, the two discs (4, 5) relative to the device body (3) rotate and wherein at least the first disc (4) is designed for grinding and is such that when a cutting edge of the cutting tool is applied to the first disc (4) and the Device body (2), preferably by hand, is pulled over the surface, the first disc (4) due to the rotation or rotation, the blade grinds.

Description

The invention relates to a device for grinding and / or polishing and the deburring and / or removal of a cutting tool, preferably a household knife.

Devices for grinding and / or polishing as well as deburring and / or peeling are well known from the prior art. For example, devices are known in which the abrasive on blocks or round ggfl. also angular edges are applied. To grind a cutting tool, the operator must hold it in one hand and in the other hand the cutting tool to be ground or polished. The device then has to be pulled by the operator over the cutting edge of the cutting tool to be ground or polished.

This procedure has the disadvantage that as far as possible the same angle should be kept between the cutting edge and the cutting tool in order to achieve a good grinding result. This is especially so difficult because both the cutting tool and the grinding tool must be kept virtually free in the air by the operator and thus a high level of skill of the operator is required.

The invention is therefore based on the object to propose a device that is easy to use and also has an increased abrasive effect.

The object is achieved by the features mentioned in claim 1. Advantageous developments of the invention will become apparent from the dependent claims.

• einen Vorrichtungskörper;
• eine in dem Vorrichtungskörper drehbar gelagerte Achse;
• eine erste und eine zweite im Wesentlichen kreisrunde Scheibe, die derartig mit der drehbaren Achse verbunden sind, dass wenn der Vorrichtungskörper entlang einer Oberfläche, vorzugsweise einer Tischoberfläche, gezogen wird, sich die zwei Scheiben relativ zu dem Vorrichtungskörper drehen bzw. rotieren und wobei zumindest die erste Scheibe zum Schleifen ausgebildet und derartig beschaffen ist, dass wenn eine Schneide des Schneidwerkzeuges an die erste Scheibe angelegt ist und der Vorrichtungskörper, vorzugsweise händisch, über die Oberfläche gezogen wird, die erste Scheibe aufgrund der Drehung bzw. Rotation die Schneide schleift.

The device according to the invention for grinding and / or polishing a cutting tool, preferably a household knife, comprises:

• a device body;
• an axis rotatably mounted in the device body;
• a first and a second substantially circular disc connected to the rotatable shaft such that when the device body is pulled along a surface, preferably a table surface, the two discs rotate relative to the device body, and wherein at least the first disc is designed for grinding and is such that when a cutting edge of the cutting tool is applied to the first disc and the device body, preferably by hand, is pulled over the surface, the first disc due to the rotation or rotation grinds the blade.

According to the invention, therefore, a device is proposed which has in each case a disk on the right and left of a substantially cylindrical device body, wherein the two disks are detachably connected via an axle mounted in the interior of the device body and the axis is rotatable relative to the device body, so that an operator when it applies a cutting edge of the cutting tool to one of the two discs and pulls the device body over a surface that can grind and / or polish the blade. For the purposes of the present application, the grinding in particular also includes a deburring of the cutting edge and the polishing comprises a removal of the cutting edge of the cutting tool.

The device according to the invention is used for grinding and / or polishing a cutting tool with a cutting edge, which is ground either on one side or on both sides. In particular, knives with a coarse serrated edge and any type of outdoor and / or jackknife are among the cutting tools in the sense of the present application. In contrast to the grinding devices known from the prior art, in the grinding and / or polishing apparatus according to the invention, in a first step, the user merely has to position the cutting tool on the surface in such a way that the cutting edge of the cutting tool lies against one of the two disks. In a second step, the operator then has to pull the device body along the surface so as to grind and / or polish the cutting edge. Due to the fact that both the grinding and / or polishing device according to the invention and the cutting tool rest on the surface, a simplified and more accurate positioning is possible, so that an improved grinding and / or polishing result can be achieved.

The invention is detached from the type of surface on which the device is pulled along. For example, the surface can be a table surface or even a surface of a shelf, in particular a kitchen shelf. In principle, the surface can be any object which has an at least partially substantially flat surface, so that the cutting tool can be positioned on the surface and the device according to the invention can be pulled over this section of the object.

An advantageous development of the invention provides that the first and / or the second disc are detachably connected to the axle, so that it is or are interchangeable. Due to the fact that both the first and the second disc are releasably connected to the axle, they can be easily replaced by the operator. This may, for example, be advantageous if one of the two discs must be replaced, for example, for reasons of age or if the operator would like to better adapt the device for grinding and / or polishing on the cutting tool. In particular, when different cutting tools are to be ground and / or polished, it may be advantageous to use the two discs are interchangeable, so as to adapt the device for each grinding tool exactly. For example, the device may thus be configured such that one disc has a grinding means for grinding the cutting edge and the other disc has means for removing the cutting edge so that the cutting edge of the cutting tool can be both ground and withdrawn. The advantageous development of the invention can also provide, in particular, for the first disk to have or to have a first threaded bolt and / or the second disk to have a second threaded bolt turned on, so that the first and / or the second disk can be detachably screwed to the axle or . are. In this way, the exchange, for example, due to wear or change of the grinding process relatively quickly and easily possible.

A further advantageous development of the invention provides that at least the first disc has a first abrasive and the first abrasive ruby, sapphire, diamond, glass, ceramic, corundum or carbide or a combination of said materials.

Yet another advantageous development of the invention provides that the second disc is designed for polishing, so that when the cutting edge of the cutting tool is applied to the second disc and the device body, preferably by hand, is pulled over the surface, the second disc due to Rotation or rotation polished the cutting edge. The advantageous further development can provide, in particular, that the second disk is designed in such a way that at least one recess concentric with the center of the second disk is provided.

An alternative development of the invention provides that the second disc is also designed for grinding and has a second abrasive and the second abrasive ruby, sapphire, diamond, glass, ceramic, corundum or carbide or a combination of said materials. In particular, the training provides that the first and second Abrasives are different, so that the first and the second disc achieve a different grinding effect. Due to the different grinding action of the two disks, it is for example possible that a rough grinding of the cutting edge of the cutting tool takes place with the first disk and a fine sharpening of the cutting edge takes place with the second disk so as to achieve the most perfect possible grinding result.

• Fig. 1: eine Seitenansicht der erfindungsgemäßen Vorrichtung zum Schleifen und/oder Polieren, und
• Fig. 2: eine perspektivische Ansicht der in Fig. 1 dargestellten erfindungsgemäßen Vorrichtung.

The invention will be explained in more detail with reference to the following drawings. It shows:

• Fig. 1 a side view of the device according to the invention for grinding and / or polishing, and
• Fig. 2 : a perspective view of the in Fig. 1 illustrated device according to the invention.

FIG. 1 shows the inventive apparatus for grinding and / or polishing 1 in a side view. The device 1 comprises a substantially cylindrical device body 2, which is for example made of a wood, and preferably has a diameter of a few centimeters. The device body 2 is designed in such a form and nature that it is as well as possible in the hands of an operator, so that the operator when using the device 1 as easy as possible to grasp the device body 2 with his hand and pull over a surface.

In the device body 2, a shaft 3 rotatably supported relative to the device body 2 is formed. The axis 3 extends from the end face to a side facing away from the end face in the interior of the device body 2 and is formed in its two ends so that in each case a disc 4, 5 is releasably attachable.

The inventive apparatus for grinding and / or polishing 1 further comprises a first and a second circular disc 4, 5, wherein a disc 4 on the first end side and the other disc 5 on the side facing away from the end face of the device body 2 with the axis 3 detachable are connected.

The detachable attachment of the two discs 4, 5 to the axis 3 allows the device for grinding and / or polishing 1 to be adjusted as desired. For example, the device 1 can be adapted to different cutting tools. But even the replacement of an old or defective disk is thus easily possible. In order to enable a particularly quick and easy replacement of the discs, a turned-threaded bolt 11, 12 is preferably formed on each disc, via which the respective disc 4, 5 can be removably attached to the axle 3. The invention is not limited to the fact that both discs 4, 5 detachably connected to the axis 3, for example. Via the respective threaded bolt 11, 12, are connectable. So it is also conceivable that one of the two discs is fixed and only the other of the two discs releasably connected to the axis.

The first disc 4 has a first abrasive for grinding the cutting edge of the cutting tool. The first abrasive preferably comprises ruby, sapphire, diamond, glass, ceramic, corundum or carbide. Furthermore, the first abrasive may also comprise a combination of the aforementioned materials. With the aid of the first disc 4 and the first abrasive means, the cutting edge of the cutting tool can be ground, in which the cutting tool is positioned on the surface, and the device body 2 is then pulled across the surface for grinding.

On the one hand, the second disk 5 can be designed such that it serves for polishing or for grinding the cutting edge of the cutting tool.

In Fig. 1 this fact is indicated by the separated by a semicolon reference numerals 8 and 10.

In the event that the second disc 5 is to serve for polishing, this has at least one, preferably a plurality, concentric to the center of the second disc concentric recess or recesses 8. Through the depression or depressions 8, an improved polishing effect is achieved by the rotation of the second disk 5 caused by the rotation of the device body 2 over the surface.

The second disc 5 may also have a second abrasive 10, which preferably comprises ruby, sapphire, diamond, glass, ceramic, corundum or carbide. Furthermore, the second abrasive 10 may also comprise a combination of the aforementioned materials. The second abrasive is preferably formed such that the second wafer 5 with the second abrasive has a different abrasive action to the first wafer 4 with the first abrasive. The different grinding effect can be realized in different ways. For example. For example, the different abrasive effect can be achieved by the first and second abrasives comprising different abrasive materials, the aforementioned materials. Furthermore, it can also be achieved by a differently applied to the discs grain. But also on the individual disks differently formed density of the material grains consisting of the aforementioned materials, in particular the diamond grains, per surface area can lead to the different grinding effect. Usually, the corresponding abrasive is galvanized on the discs, so that also on the very variable controllable thickness of the nickel layer around the grains around the grinding effect can be adjusted.

To obtain a simple and quiet running movement of the two disks when pulling the device body 2 over the surface, include The rubber rings are each fixed by a groove surrounding the respective disc, so that they can not slip on the one hand, but are still interchangeable.

Fig. 2 shows a perspective view of the in Fig. 1 illustrated and previously described inventive device 1. The in Fig. 2 illustrated device 1 is configured such that the first disc 4 for grinding and the second disc 5 for polishing the cutting edge of the cutting tool is used.

With the aid of the device 1 configured in accordance with the invention, the cutting edge of the cutting tool can be ground in a first step. For this purpose, the cutting edge of the cutting tool is placed on the surface and positioned corresponding to the first disk 4 of the device 1. Subsequently, the device body 2 is pulled along the surface by the operator. In Fig. 2 this pulling movement is indicated by the arrow "A". By the pulling movement takes place a rotational movement of the first disc 4, which in turn ensures that the cutting edge is ground.

In a second step, after grinding, the cutting edge is repositioned to the device 1. This time, however, not to the first disc 4, but to the second disc 5, which serves to polish the cutting edge of the cutting tool. Again, the device body 2 is pulled along the surface by the operator, so that by the pulling movement and the concomitant rotation of the second disc 5, the polishing of the cutting edge of the cutting tool is saturated. In this way, the cutting edge can both grind and polish.

It goes without saying that the invention is not limited to the example described above, but the device 1 can also be otherwise configured or used. For example, As already indicated, the second disc 5 also serve for grinding, so that in a first step with the first disc 4 a rough grinding feasible and in a second step with the second disc 5 a finer grinding of the cutting edge is feasible. Of course, only one of the two discs of the device 1 according to the invention can be used either for grinding or polishing the cutting edge of the cutting tool.

LIST OF REFERENCE NUMBERS

1

Device for grinding and / or polishing

2

device body

3

axis

4

First disc

5

Second disc

6

First rubber ring

7

Second rubber ring

8th

Concentric recess

9

First abrasive

10

Second abrasive

11

First threaded bolt

12

Second threaded bolt

A

pulling

Claims (8)

Device for grinding and / or polishing a cutting tool, preferably a household knife, comprising: a device body (2); - An axis in the device body (2) rotatably mounted axis (3); - A first and a second substantially circular disc (4, 5) which are connected to the rotatable shaft (3) such that when the device body (2) along a surface, preferably a table surface, is pulled, the two discs (4, 5) relative to the device body (3) rotate and wherein at least the first disc (4) is designed for grinding and is such that when a cutting edge of the cutting tool is applied to the first disc (4) and the Device body (2), preferably by hand, is pulled over the surface, the first disc (4) due to the rotation or rotation, the blade grinds. Apparatus according to claim 1, wherein the first and / or the second disc (4, 5) are detachably connected to the axle (3) so that it is exchangeable. Device according to the preceding claim, wherein the first disc (4) has a first turned-threaded bolt (11) and / or the second disc (5) has a second turned-threaded bolt (12), so that the first and / or the second Disk with the axis (3) is releasably screwed or are. Device according to at least one of claims 1 to 3, wherein at least the first disc (4) comprises a first abrasive (9) and the first abrasive (9) comprises ruby, sapphire, diamond, glass, ceramic, corundum or carbide or a combination thereof Has materials. Device according to at least one of claims 1 to 4, wherein further the second disc (5) is designed for polishing, so that when the cutting edge of the cutting tool is applied to the second disc (5) and the device body (2), preferably manually over the surface is pulled, the second disc (5) due to the rotation or rotation polished the blade. Device according to the preceding claim, wherein the second disc (5) is designed such that at least one substantially concentric to the center of the second disc (5) recess (8) is provided. Device according to at least one of claims 1 to 4, wherein the second disc (5) is also designed for grinding and a second abrasive (10) and the second abrasive (10) ruby, sapphire, diamond, glass, ceramic, corundum or carbide or a combination of said materials. Apparatus according to the preceding claim, wherein the first and second abrasive means (9, 10) are different so that the first and second discs (4, 5) achieve a different grinding action.

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