DE202020001180U1 - Roll grinder and roll grinder set - Google Patents

Abstract

Roller grinder,
namely a manually operated device for grinding and / or polishing a knife edge,
with an elongated, straight handle (10),
which can be assigned a virtual longitudinal central axis (LMA) in its longitudinal direction, and
which in this longitudinal direction has two, spaced handle ends, on each of which a circular disc (40 and 40 ') is rotatably attached and held, the
- One, the handle (10) removed end face (41), which is formed in one disc (40) as a grinding surface (43), and in the other disc (40 ') as a honing or polishing surface (44) or is formed as a different grinding surface, which has different grinding properties than the one grinding surface (43), and
- Overall, such an arrangement is provided that each disc (40, 40 ') can roll on a flat surface and rotates with respect to the handle (10) when the user places the roller grinder (1) on this surface and the handle (10 ) grips with fingers of one hand and thus moves the roller grinder (1) back and forth on this surface on which the knife to be treated is held in a defined arrangement, and one of the rotating disc surfaces (43 or 44) contacts and grinds or polishes the cutting edge ,
characterized in that
each disc (40, 40 ') has a centrally arranged, axially projecting pin (45);
there is also a ball bearing (55) having an inner ring (56) and a larger outer ring (58);
the pin (45) is inserted into the inner ring (56) on the ball bearing (55) and is permanently held in a rotationally fixed manner therein;
For the rotatable attachment and mounting of a disc (40, 40 ') equipped in this way to the handle (10)
- The grip (10) has a grip end (20) at each grip end, which ends on a grip face (22);
- In this handle end piece (20) to the handle end face (22) open cavity (25) exists or is created; and
- The ball bearing (55) provided with the attached disc (40, 40 ') is inserted into this cavity (25) and is permanently stuck or stuck, but releasably, arranged and held therein; and
If the ball bearing (55) is fixed but detachable in the cavity (25) on the handle end piece (20), there is at least one radially oriented and radially adjustable locking means (30) which can be inserted into the cavity (25), locking means end piece ( 31) has; and
this adjustable locking means (30) can be brought into a position in which the locking means end piece (31) lies firmly against the outer ring (58) of the ball bearing (55) and thus holds the ball bearing (55) in the cavity (25) by means of a non-positive locking.

Description

TECHNICAL AREA

The present invention relates to the technical field of hand-operated devices for grinding and / or polishing cutting tools, in particular knives for use in the kitchen and household. More particularly, the invention relates to a roller grinder. Such roller grinders typically have an elongated straight handle that can be gripped by a user with fingers of one hand. A circular disc is rotatably attached and held at each grip end; the end face of the one disc, which is removed from the handle, can be designed as a grinding surface, and the end face of the other disc can be designed as a smooth, recessed honing or polishing surface. Overall, such an arrangement is provided that each disc can roll on a flat surface and rotate with respect to the handle when the user places this roller grinder on this surface and grips the handle and thus moves the roller grinder back and forth on this surface which the cutting tool to be treated, in particular the knife, is held in a defined arrangement, and one of the rotating disk surfaces contacts the cutting edge and grinds or polishes.

Furthermore, the invention relates to a roller grinder set comprising the roller grinder described above and a positioning body to be arranged on the flat base, with which the knife to be treated can be held in a defined orientation, so that a disc which rolls and rotates on this base on the roller grinder cuts the knife edge can optimally grind or polish.

THE PRIOR ART

The principle of such a roller grinder is from the document GB 437 733 A known, which is referred to here as a sharpening device for sharpening cutting tools such as knives, scythes and the like; a simple and easy-to-use device for household and agriculture is to be provided. The device has a sharpening disc, for example an abrasive disc, which is attached to one end of an axis which is rotatably mounted in a handpiece. At the other end of the axis a small metal wheel is attached, which has the same diameter as the sharpening disc, so that the sharpening device is stable and can roll on a flat surface. After the knife to be sharpened is clamped in position with respect to the flat surface, the sharpening device is rolled back and forth on the surface with the end face of the sharpening disc resting on the cutting edge of the knife to be sharpened and this cutting edge at an angle suitable for cutting is sharpened.

• - einen Vorrichtungskörper;
• - eine in dem Vorrichtungskörper drehbar gelagerte Achse;
• - eine erste, im Wesentlichen kreisrunde Scheibe, die zum Schleifen ausgebildet ist, und die mit einem ersten Achsenende verbunden ist; und
• - eine zweite, im Wesentlichen kreisrunde Scheibe, die mit einem zweiten, zum ersten Achsenende entgegengesetzten Achsenende verbunden ist.

Die Verbindung zwischen Scheibe und Achsenende erfolgt über einen angedrehten Schraubenbolzen, der in ein axiales Innengewinde im Achsenende eingeschraubt wird. Wenn der Vorrichtungskörper entlang einer Oberfläche, insbesondere einer Tischoberfläche gezogen wird, dann drehen sich die beiden Scheiben relativ zu dem Vorrichtungskörper und rotieren; wenn eine Schneide des Schneidwerkzeuges an die erste Scheibe angelegt ist, und der Vorrichtungskörper insbesondere händisch über die Oberfläche gezogen wird, dann schleift die Schleiffläche der ersten, sich drehenden bzw. rotierenden Scheibe die Schneidwerkzeugschneide.The document also discloses DE 10 2016 009 482 B4 a roller grinder of this type, namely a device for grinding and / or polishing a cutting tool, in particular a household knife. The device has

• - a device body;
• - An axis rotatably mounted in the device body;
• - A first, substantially circular disc, which is designed for grinding, and which is connected to a first axis end; and
• - A second, substantially circular disc, which is connected to a second, opposite axis end to the first axis end.

The connection between the washer and the axle end is made using a screw bolt that is screwed into an axial internal thread in the axle end. If the device body is pulled along a surface, in particular a table surface, then the two disks rotate relative to the device body and rotate; If a cutting edge of the cutting tool is applied to the first disc and the device body is pulled over the surface in particular by hand, then the grinding surface of the first rotating or rotating disc grinds the cutting tool edge.

• - der eine ebene Unterseite hat;
• - der eine dazu beabstandete ebene Oberseite hat, die eine größere Länge aufweist, als die Unterseite; und
• - der zwischen Unterseite und Oberseite schräggestellte Schmalseiten hat, deren Ausrichtung mit einer Senkrechten auf die Unterseite einen Winkel von 15 Grad einschließt;
• - hinter diesen Schmalseiten sind innerhalb des Positionierkörpers Permanentmagnete angeordnet, welche die angelegte, aus Stahl bestehende Schneidwerkzeugschneide mit Hilfe von Magnetkraft festhalten.

The roller grinder after DE 10 2016 009 482 B4 is also shown and described on the Internet; see. the URL ww.horl-1993.de. According to this illustration, this roller grinder has a “magnetic grinding gauge” with which the cutting tool to be ground is held at the perfect cutting angle with respect to the rotating grinding wheel. This "magnetic grinding gauge" forms a flat, essentially cuboid positioning body,

• - which has a flat underside;
• - Which has a spaced flat top, which has a greater length than the bottom; and
• - Which has slanted narrow sides between the underside and the top, the alignment of which includes an angle of 15 degrees with a perpendicular to the underside;
• - Behind these narrow sides, permanent magnets are arranged within the positioning body, which hold the applied cutting tool cutting edge made of steel with the aid of magnetic force.

OBJECT OF THE PRESENT INVENTION

Compared to this prior art, the object of the present invention is to provide an alternative roller grinder. Furthermore, a roll grinder set equipped with this alternative roll grinder is to be provided, which has an improved positioning body.

THE INVENTION SOLUTION OF THE ABOVE TASK

• - eine, zum Griffstück entfernte Stirnfläche hat, die bei der einen Scheibe als die eine Schleiffläche ausgebildet ist, und die bei der anderen Scheibe als Abzieh- oder Polierscheibe oder als die andere Schleiffläche ausgebildet ist, die andere Schleifeigenschaften hat, als die eine Schleiffläche, und
• - insgesamt eine solche Anordnung vorgesehen ist, dass jede Scheibe auf einer ebenen Unterlage rollen kann und dabei bezüglich des Griffstückes rotiert, wenn ein Benutzer den Rollschleifer auf diese Unterlage setzt und das Griffstück mit Fingern einer Hand greift und damit den Rollschleifer auf dieser Unterlage hin und her bewegt, auf welcher das zu behandelnde Messer in definierter Anordnung gehalten ist, und eine der rotierenden Scheibenflächen dessen Schneide kontaktiert und schleift oder poliert,

ist die erfindungsgemäße Lösung obiger Aufgabe
dadurch gekennzeichnet, dass
jede Scheibe einen mittig angeordneten, axial abstehenden Zapfen aufweist; ferner ein Kugellager vorhanden ist, das einen Innenring und einen größeren Außenring hat;
der Zapfen in den Innenring am Kugellager eingesetzt und darin dauerhaft drehfest gehalten ist;
zur drehbaren Anbringung und Halterung einer so ausgestatteten Scheibe am Griffstück

• - das Griffstück an jedem Griffstückende ein Griffstückendstück hat, das an einer Griffstückstirnfläche endet;
• - in diesem Griffstückendstück ein zur Griffstückstirnfläche hin offener Hohlraum besteht oder geschaffen ist; und
• - das, mit der anhängenden Scheibe versehenen Kugellager in diesen Hohlraum eingesetzt und darin dauerhaft festsitzend oder festsitzend, aber lösbar, angeordnet und gehalten ist; und

bei einer festsitzenden, aber lösbaren, Anordnung des Kugellagers im Hohlraum am Griffstückendstück wenigstens ein radial ausgerichtetes und radial verstellbares Arretiermittel vorhanden ist, das ein in den Hohlraum eindringbares Arretiermittelendstück hat; und
dieses verstellbare Arretiermittel in eine Position bringbar ist, in welcher das Arretiermittelendstück am Kugellageraußenring festsitzend anliegt und das Kugellager so mittels kraftschlüssiger Arretierung im Hohlraum am Griffstückendstück festhält.Starting from a roller grinder,
namely a manually operated device for grinding and / or polishing a knife edge,
with an elongated, straight handle,
which can be assigned a virtual longitudinal center axis in its longitudinal direction, and which has two spaced-apart ends of the handle in this longitudinal direction, on each of which a circular disc is rotatably attached and held, the

• has an end face remote from the handle, which is designed as one grinding surface on one disc and which is designed as a honing or polishing disc on the other disc or as the other grinding surface, which has different grinding properties than the grinding surface, and
• - Overall, such an arrangement is provided that each disc can roll on a flat surface and rotates with respect to the handle when a user puts the roller grinder on this surface and grips the handle with fingers of one hand and thus the roller grinder on this surface and moved here, on which the knife to be treated is held in a defined arrangement, and one of the rotating disk surfaces contacts the cutting edge and grinds or polishes,

is the solution of the above object
characterized in that
each disc has a centrally located, axially projecting pin; there is also a ball bearing which has an inner ring and a larger outer ring;
the pin is inserted into the inner ring on the ball bearing and is held there permanently in a rotationally fixed manner;
for the rotatable attachment and mounting of a disc equipped in this way on the handle

• - The handle at each end of the handle has a handle end that ends at a handle end face;
• - In this handle end piece there is or is a cavity open towards the handle end face; and
• - The ball bearing provided with the attached disc is inserted into this cavity and is permanently stuck or stuck, but detachable, arranged and held therein; and

in the case of a fixed, but detachable, arrangement of the ball bearing in the cavity on the handle end piece, there is at least one radially oriented and radially adjustable locking means which has a locking means end piece which can be penetrated into the cavity; and
this adjustable locking means can be brought into a position in which the locking means end piece rests firmly against the ball bearing outer ring and thus holds the ball bearing in the cavity on the grip piece end piece by means of a force-fit locking means.

Such a roller grinder does not require a central bore which is guided through the entire length of the handle and also does not require the further component of an axis which is rotatably mounted within this bore and which extends over the entire length of the handle. In the roller grinder according to the invention, one disc can rotate independently of the other disc.

ADVANTAGEOUS DESIGNS

Advantageous and preferred embodiments of the invention result from the subclaims, the following description and the attached drawings.

The roller grinder according to the invention has an elongated straight handle, on the distal ends of which a circular disc is rotatably attached and held. A virtual longitudinal center axis can be assigned to this roller grinder. Hereinafter referred to as “axial” or “axial direction”, a direction parallel to this longitudinal central axis; "Radial" or "radial direction" means a direction transverse or perpendicular to this longitudinal central axis. With regard to a radial center plane, the two halves of the roller grinder are essentially identical and are arranged in mirror image to one another. Consequently, it is sufficient if only the handle, a disc and their rotatable attachment and holder at the end of the handle are explained below.

The handle forms an elongated straight body which has a flat, radially oriented end face at both ends of the handle. The grip circumference can have a round or polygonal cross section between these end faces; a round handle can be cylindrical or barrel-shaped; barrel-shaped means here that the grip section is larger in the grip center than at the grip ends. A polygonal grip cross section can preferably be square, for example with a side length of 25 mm to 50 mm. Such a grip can be solid or hollow within a grip shell. A solid handle can typically consist of wood, natural stone, here, for example, granite, ceramic and other artificial stone materials, a light metal such as aluminum, magnesium and their alloys, and also consist of a durable and usable plastic; Suitable plastics here are, for example, polyamides, polycarbonates, polyacrylates, polymethacrylates, and selected materials, such as acetal copolymers (for example “HOSTAFORM”), rigid PVC, polyester and sulfone. A handle made of plastic can be metallized on its surface or can be provided with a decorative cover layer, for example with an imitation wood film or an imitation natural stone film. In the case of a hollow grip, a grip shell made of metal, here for example aluminum, brass, steel, stainless steel or stainless steel, has proven itself well. Such a handle piece with a length of 50 mm to 100 mm and with a cross-sectional dimension of 25 mm to 50 mm can be easily gripped by a user with the fingers of one hand and pushed back and forth on a flat surface; such grip dimensions are preferably provided.

The roller grinder equipped with such a handle rolls on two, largely identical, circular disks, each with the same jacket diameter; With a handle cross-sectional dimension of 25 mm to 50 mm, an adapted disc shell diameter of 45 mm to 80 mm has proven itself.

In the area of the pane casing, a completely closed ring made of elastic material can preferably rest on the pane, which extends around the entire circumference of the pane casing. Such a ring can be inserted into a circumferential groove which is recessed on the disk jacket in the disk body in such a way that at least part of the ring cross section projects radially beyond the disk jacket circumference. Typical ring materials are rubber, rubber and soft to semi-hard synthetic elastomers. Such a ring increases the adhesion between the disc shell and the surface of the underlay and ensures that each disc is set in rotation when the roller sander is pushed back and forth on the flat surface.

Apart from the ring made of elastic material, each disc can be formed in one piece or can be composed of several disc components, as will be described in more detail below.

Although not limited to this, each disc is preferably made of steel, here in particular stainless steel or stainless steel; The contours of a steel disc can be finished and have a high dimensional accuracy. At least one wheel is designed as a grinding wheel. For this purpose, a nickel layer can be applied to the end face of a steel disk, in which hard abrasive particles are bound.

Such abrasive particles can consist, for example, of corundum, silicon carbide and natural or synthetic diamond. If the wheel is made of another material, for example wood or stone material, a typical grinding wheel can be attached to the front face of the wheel, which in turn is equipped with the abrasive particles mentioned above. The main grinding wheel on the roll grinder according to the invention typically contains abrasive particles with an average grain size of 100 to 1000, for example about 350. If the other wheel on the roll grinder according to the invention is designed as a second grinding wheel, it has different grinding properties than the main grinding wheel, for example based on another abrasive, and / or different abrasive grain and / or different abrasive density in the abrasive binder; For example, this second grinding wheel can be designed for fine grinding and contains abrasive particles with a fine grain size of 3000 or finer. Alternatively, the other disc on the roller grinder according to the invention is designed for honing and / or polishing and typically has a smooth end face in which elongated depressions are recessed.

There is a centrally located peg on each disc, axially protruding from the disc's inner surface, which is removed from the grinding or polishing layer. This pin is inserted in the inner ring of the ball bearing and is permanently held in it so that it cannot rotate. This pin is an elongated straight body, the length of which is typically less than its cross-sectional dimension; "Straight body" means that the pin cross-section remains the same over the entire length of the pin. The pin length should not exceed the axial height of the ball bearing. The pin cross-section can be chosen as long as the pin with this pin cross-section can be inserted into the inner ring on the ball bearing and can be permanently held in it; for example, a prismatic body with a polygonal base can be provided. In individual cases, a sleeve can be provided between the pin circumference and the inner ring inner circumference, which permanently holds the pin firmly in the inner ring of the ball bearing.

According to the invention, a disk with a roller-shaped pin is preferably provided, which can be inserted into the inner ring on the ball bearing with tight play; such an arrangement automatically centers the entire ball bearing with respect to the pin and with respect to the longitudinal central axis of the entire roller grinder.

"Roll-shaped" is derived from a roll; this is a straight circular cylinder and means here that the pin forms a solid, straight circular cylinder, such a cylinder is delimited by two parallel planes, and the piece of the cylinder surface between the parallel planes is the jacket of the cylinder; the cylinder surface cuts the base surface or the top surface of the cylinder out of the two parallel planes; see: SMALL ENCYCLOPEDICS / Mathematics / edited by VEB BIBLIOGRAPHISCHES INSTITUT LEIPZIG, 1967, 2nd edition, there page 223 .

The axially projecting pin can be attached to the disk body in various ways, for example welded to it, if the disk body and pin consist of metal. The pin is preferably formed in one piece with the disk body, then also consists of the disk body material and stands free-standing from the center of the remaining, then comparatively thin disk made of disk material. A corresponding disk body can already be produced with this shape, for example in the casting process, or material can be removed from an original solid disk body, for example by milling measures, until the desired disk body with a protruding pin is obtained. In the case of a multi-part disk, in addition to the journal, an annular, axially aligned web can protrude from the same disk surface and is arranged concentrically to the journal, as will be explained in more detail below. The ball bearing is placed on the disc body, whereby the free-standing pin is inserted into the inner ring on the ball bearing; a circumferential annular groove remains between the outer circumference on the ball bearing outer ring and the inner circumference on the annular web.

A ball bearing is provided for the rotatable attachment and mounting of a disc to a handle end piece. A ball bearing is a roller bearing, and different ball bearings differ in particular with regard to the rolling elements used. A typical and frequently used ball bearing is the single row deep groove ball bearing, the rolling elements of which consist of a row / layer of steel balls; Within the scope of the present invention, such a single-row deep groove ball bearing is preferably used as the ball bearing; as far as used here, the term “ball bearing” is also intended to include such a single-row deep groove ball bearing. A deep groove ball bearing typically forms a disk-shaped body on which an inner ring is formed, which is surrounded by an outer ring; between the inner ring and outer ring there is a number of rolling elements, preferably steel balls, arranged in one position, which are kept at a distance by a cage; In the single row deep groove ball bearing, the steel balls are arranged one behind the other in a row surrounding the inner ring; since the balls run in the inner and outer ring on hardened steel surfaces, the rolling friction on such a deep groove ball bearing is low. Deep groove ball bearings of this type are commercially available with a large number of different dimensions. Because the outer ring made of steel is largely inert, a ball bearing holder is often used to hold and fasten such a deep groove ball bearing, which grips around the outer ring and rests there against rotation; Compared to the stationary ball bearing holder, the pin that is rotatably inserted and held in the inner ring can rotate with little friction. If a permanently fixed arrangement and mounting of the deep groove ball bearing on the handle is intended, the ball bearing holder can be inserted into a cavity formed in the end piece of the handle and can be arranged and held there permanently, for example with the aid of an adhesive connection.

• Innendurchmesser des Innenrings × Außendurchmesser des Außenrings × Höhe mm
• Ohne darauf beschränkt zu sein, können am erfindungsgemäßen Rollschleifer vorzugsweise nachstehende Rillenkugellager eingesetzt werden:
  • 10,00 × 28,00 × 8,00 mm
  • 12,00 × 28,00 × 7,00 mm
  • 15,00 × 32,00 × 8,00 mm
  • 17,00 × 35,00 × 8,00 mm
  • 20,00 × 42,00 × 8,00 mm

Typical deep groove ball bearings are commercially available with the following designations derived from the dimensions:

• Inner diameter of the inner ring × outer diameter of the outer ring × height mm
• Without being limited to this, the following deep groove ball bearings can preferably be used on the roller grinder according to the invention:
  • 10.00 x 28.00 x 8.00 mm
  • 12.00 x 28.00 x 7.00 mm
  • 15.00 x 32.00 x 8.00 mm
  • 17.00 x 35.00 x 8.00 mm
  • 20.00 x 42.00 x 8.00 mm

A practically implemented embodiment of a roller grinder according to the invention, which has a cylindrical handle with a jacket diameter of approximately 42 mm, is equipped with such a 12.00 × 28.00 × 7.00 mm deep groove ball bearing. The choice of the ball bearing also determines the dimensions of the preferably provided cylindrical pin, namely a straight cylindrical body with a length of 7 or 8 mm and with almost one of the diameters specified above, namely slightly less than 10, 12, 15, 17 or 20 mm , so that the pin can be inserted into the inner ring on the selected deep groove ball bearing with tight play.

On the above-mentioned roller grinder according to the invention, each disc is made of steel, has a diameter of 62 mm and has a mass of about 200 g (grams); Such a disc can be rotatably attached and held on the handle with the aforementioned ball bearing.

“About” here and elsewhere in this document means a range that ranges from minus 3% to plus 3% of the stated numerical value; consequently, in the present case, a grip shell diameter of approximately 42 mm can actually have values of 40.74 mm to 43.26 mm, and accordingly a disc mass of approximately 200 g can actually have values of 194 g to 206 g.

The disc is non-rotatably connected to the inner ring on the ball bearing via the pin. Various options can be provided for the rotationally fixed fit of the pin in the inner ring; for example, a press fit can be provided between the journal casing and the inner ring inner circumference; alternatively, a welded or soldered connection between the pin and the inner ring can be provided; According to a further alternative, the pin can be inserted into a sleeve made of plastic or the like, which in turn sits non-positively in the inner ring, for example via a press fit or via an adhesive connection.

In the context of the present invention, a rotationally fixed fit of the roller-shaped pin in the inner ring of the ball bearing is preferably produced in that
an axial longitudinal bore is left in the journal,
which is provided with an internal thread,
into which a screw is screwed,
holding a washer
which rests on the inner ring of the ball bearing and thus holds the disc permanently and non-rotatably on the inner ring of the ball bearing without impairing the rotatability of the disc and inner ring with respect to the outer ring on the ball bearing.

Such a non-rotatable fit of the roller-shaped pin in the inner ring of the ball bearing can be produced easily, can be safely checked and does not impair the function of the ball bearing. The permanent seating of the screw in the tenon can be secured and guaranteed using conventional means.

• - das Griffstück an jedem Griffstückende ein Griffstückendstück hat, das an einer Griffstückstirnfläche endet;
• - in diesem Griffstückendstück ein zur Griffstückstirnfläche hin offener Hohlraum mit passenden Abmessungen besteht oder geschaffen ist, damit das Kugellager mit radialer Ausrichtung in diesen Hohlraum eingesetzt werden kann; und
• - das in so diesen Hohlraum eingesetzte Kugellager einerseits im Hohlraum dauerhaft festsitzend oder andererseits im Hohlraum festsitzend, aber lösbar, angeordnet und gehalten ist.

For the rotatable attachment and mounting of a disc equipped in this way to the handle, the invention provides that

• - The handle at each end of the handle has a handle end that ends at a handle end face;
• - In this grip end piece there is or is a cavity open to the handle end face with suitable dimensions so that the ball bearing can be inserted with radial alignment into this cavity; and
• - The ball bearing inserted into this cavity is permanently stuck on the one hand in the cavity or on the other hand firmly, but detachably, arranged and held in the cavity.

This cavity can have different inner contours within a solid grip. If the ball bearing sits in a non-rotatable manner in a ball bearing holder, the cavity inner contour is adapted to the outer contour of the ball bearing holder; in the event that the ball bearing holder forms an angular, for example cuboid, body, the cavity has an adapted, angular, for example cuboid, inner contour. The ball bearing holder is permanently fixed, for example glued, in this cavity. A pot-shaped recess is preferably formed in the solid grip end piece, starting from its grip face, which is delimited by a flat pot base and by a circumferential pot wall, which forms a hollow cylinder inner jacket. A cylindrical cavity is created in which the ball bearing outer ring is inserted concentrically and closely. A permanent tight fit of the ball bearing outer ring in the hollow cylinder inner jacket can be created, for example by a press fit, adhesive connection or the like.

A 2-component acrylate adhesive, such as one of the known LOCTITE® products (LOCTITEO is a trademark of Henkel AG & Co. KGaA, 40191 Düsseldorf, DE), or a comparable 2 -Component acrylate adhesive can be used, which is well suited for the permanent connection of metal and plastic.

Alternatively, the ball bearing outer ring can be inserted into this hollow cylinder inner jacket with tight play so that the ball bearing outer ring can be detached from the hollow cylinder inner jacket if necessary, the ball bearing can be removed from the cavity, and the disk can be removed from the handle and, if necessary, replaced by another new disk; in this case, the ball bearing is held on the ready-to-use roller grinder by one or more adjustable locking means (s) in the cylindrical cavity, as will be explained in more detail below.

If the handle consists of a cylindrical tubular piece, the end section of which has a sufficient and suitable wall thickness, the round inner tube section can directly and directly form the hollow cylindrical inner jacket, against which the outer ring of the ball bearing lies directly and directly, here either permanently stuck or stuck, but detachable, attached, as stated above.

If a hollow cylinder made of steel, in particular stainless steel, is provided as the handle, the hollow cylinder jacket of which has a comparatively small wall thickness, a plastic body can be firmly inserted into each end section of the hollow cylinder jacket, in which the pot-shaped recess described above is formed; In this case, the circumferential cup wall on the plastic body forms the hollow cylinder inner jacket on which the ball bearing outer ring is permanently stuck or stuck, but releasably, as stated above.

If the ball bearing is firmly but detachably inserted in the open, cylindrical cavity in the end piece of the grip, the ball bearing must be prevented from accidentally slipping out of this cavity. For this purpose, at least one radially aligned and radially adjustable locking means is present on the handle end piece, which has a locking means end piece that can penetrate into the cavity. During its radial adjustment, this locking means can be brought permanently into a position in which the locking means end piece penetrates into the cylindrical cavity in the grip piece end piece, contacts the ball bearing outer ring and acts on it with such mechanical (pressure) force that a positive locking between the ball bearing and grip piece end piece is created will, which - without affecting the rotatability of the inner ring within the ball bearing outer ring - prevents unintentional removal of the ball bearing from the cylindrical cavity in the handle end piece and thus unintentional removal of the disc from the handle.

For this purpose, a radial bore, for example, on which an internal thread is formed, can be recessed in the handle end piece including the cavity wall. The locking means can be, for example, a screw that is adjustable in this internal thread. When the screw is screwed into this internal thread, the screw end finally enters the cavity, contacts the ball bearing outer ring and holds it firmly. After unscrewing the screw in the internal thread and thus removing the screw end from the ball bearing outer ring, the washer can be separated from the handle as desired and replaced with another washer if necessary. A plurality of such locking means are preferably provided on the handle end piece, for example three locking means on a round handle end piece, each of which is arranged at a distance of 120 degrees from one another around the circumference of the handle end piece.

In individual cases, this screw can preferably be a grub screw which can be completely countersunk within the wall of a hollow cylinder jacket, which is formed by the end section of a cylindrical handle. In this way, an arrangement can be created in which the end section of a cylindrical grip piece - in spite of the grub screw (s) located therein - is immersed in a circumferential annular groove in the disc body and can be rotated with tight play relative to the inner circumference of an annular web which is from the inner surface of the pane protrudes axially ..

Further advantageous embodiments of the roller grinder according to the invention, which have not yet been mentioned above, result from the subclaims.

In a first, preferably provided embodiment of the roller grinder according to the invention, the elongated, straight grip piece forms a solid body which has a round or polygonal, in particular square, cross section; and
In each end piece of this solid body there is a cup-shaped recess that is open towards the end face and is delimited in the radial direction by a circumferential cup wall, which provides a hollow cylinder inner jacket on which the ball bearing outer ring is permanently stuck or stuck, but releasably.

A first, comparatively simple embodiment of the roller grinder according to the invention can be provided.

In a second, preferably provided embodiment of the roller grinder according to the invention, the elongated, straight grip piece forms a cylindrical tube piece with an inner diameter of about 28 mm or about 32 mm, which has a smooth tube wall with a wall thickness of about 3 mm to about 6 mm; each end section of this tube wall forms a handle end piece. Each end section of this hollow cylindrical tube piece forms a hollow cylinder inner jacket on which a ball bearing outer ring lies directly and directly; typically a 10.00 × 28.00 × 8.00 mm ball bearing or a 12.00 × 28.00 × 7.00 mm ball bearing or a 15.00 × 32.00 × 8.00 mm ball bearing is used.

An inventive roller grinder with a comparatively simple construction can be obtained, which consists of a few components.

• - die von einer umlaufenden Topfwand umgeben und begrenzt ist;
• - die in axialer Richtung eine Tiefe größer 6 mm hat;
• - die in radialer Richtung einen Innenumfang mit einem Innendurchmesser von etwa 29 mm bis etwa 38 mm hat; und
• - die am Griffstückendstück einen Hohlzylinderinnenmantel bereitstellt, an welchem der Kugellageraußenring entweder dauerhaft festsitzend oder festsitzend, aber lösbar, anliegt.

In a third, preferably provided embodiment of the roller grinder according to the invention, the elongated, straight grip piece forms a cylindrical one, made of steel, in particular stainless steel existing piece of pipe, or such a hollow cylinder, which has a wall thickness less than 3 mm, preferably has such a wall thickness of about 0.5 mm to 1.2 mm and which has an inner circumference with an inner diameter less than or equal to 48 mm ; and
In each end section of this pipe section or hollow cylinder, a plastic body is firmly inserted, on / in which
an open cup-shaped recess is formed,

• - which is surrounded and bounded by a surrounding pot wall;
• - Which has a depth greater than 6 mm in the axial direction;
• - Which has an inner circumference in the radial direction with an inner diameter of about 29 mm to about 38 mm; and
• - Which provides a hollow cylinder inner jacket on the handle end piece, on which the ball bearing outer ring is either permanently stuck or stuck, but releasable.

In this third embodiment of the roller grinder according to the invention, a multi-part disc can preferably be provided, as described below.

• - ist einstückig mit dem Scheibenkörper ausgebildet;
• - ist konzentrisch und in radialem Abstand zum Zapfen angeordnet; und
• - ist an seinem Außenumfang mit einem Außengewinde versehen.

According to a further, preferably provided embodiment, it is provided that, in addition to the pin, a largely closed, annular web protrudes in the axial direction from the inner surface of each disk, which is aligned concentrically and at a radial distance from the pin, so that a circumferential annular ring is formed between the pin and the web Groove is created. This footbridge

• - Is integrally formed with the disc body;
• - Is arranged concentrically and at a radial distance from the pin; and
• - is provided with an external thread on its outer circumference.

In addition, there is a so-called T-ring, namely a one-piece profile ring with a T-shaped cross-section, consisting of T-bars and a T-stem protruding at right angles, which is provided on its inner circumference with an internal thread that fits into the external thread on the web can be screwed in.

The T-beam preferably has an outer circumference that corresponds to the outer circumference of the window jacket. Furthermore, the T-beam preferably has a thickness (dimension in the axial direction) and a surface such that it is perceived optically as part of the disk, in particular as an outer ring body portion of the disk.

On the T-ring, an outer step delimited by a T-bar and a T-trunk is formed, in which the ring made of elastic material described above is inserted;
when the T-ring is screwed onto the web, this ring is clamped between the remaining disc body and the T-stem;
in this arrangement the ring made of elastic material has an outer circumference which is larger than that of the disk jacket circumference and which is larger than the outer circumference of the T-bar on the T-ring.

The ring made of elastic material is firmly and permanently clamped between the washer body and the T-bar on the T-ring and extends beyond the outer circumference of the washer shell and the T-bar, so that the washer moves back and forth on the flat surface Pad rolls on this ring. The ring reduces rolling noises and increases the adhesion of the disc to the base, so that each disc is set in rotation when the roller sander equipped in this way moves back and forth on the flat base.

In this embodiment, a circumferential annular groove is created on the disc body between the outer circumference of the ball bearing and the inner circumference of the web, which has a sufficient radial width so that the round end section on a cylindrical grip piece can dip into this groove, in particular a round end section on the tube wall of the one forming a grip piece Can dip piece of pipe, which forms a handle end piece. In particular, such dimensions are chosen that the outer circumference of the pipe section end section is spaced from the inside wall of the web with a small clearance, so that the disk body including the web can rotate unhindered with respect to the stationary handle section including the round handle section end section immersed in the groove. Furthermore, this annular groove has a sufficient axial depth so that the radial bore (s) on the pipe section end section which dips into the groove are covered by the annular web for receiving a locking means. A grub screw is used as a locking device, which can be completely countersunk in the hole and thus does not interfere.

There is only a narrow gap between the outer circumference on the round end section immersed in the groove on the cylindrical handle and the inner circumference on the annular web, into which dirt particles and other solids cannot penetrate; it will have a clean appearance and a hidden, protected arrangement of the round handle end portion within the annular groove preserved on the disc body; the disc is still held and arranged on the handle.

To the roll grinder set

The roller grinder is a hand-operated device for grinding and / or polishing a knife edge. Overall, such a design is provided that each disc can roll on a flat surface and rotate with respect to the handle when the user has placed this roller grinder on this surface and grips the handle and thus moves the roller grinder back and forth on this surface which holds the knife to be treated in a defined arrangement, and one of the rotating disk surfaces contacts the cutting edge and grinds or polishes. In a roller grinder set according to the invention, in addition to the roller grinder, a positioning body to be arranged on the flat base is provided, with which the knife to be treated can be held in a defined orientation so that a rotating and rotating disc on this base can optimally grind or polish the knife edge.

• - der eine ebene Unterseite hat,
• - der eine dazu beabstandete Oberseite hat, die eine größere Länge aufweist, als die Unterseite, und
• - der zwischen Unterseite und Oberseite schräggestellte Schmalseiten hat, deren Ausrichtung mit der Unterseite einen Winkel von 100 bis 120 Grad, insbesondere einen solchen Winkel von etwa 105 Grad einschließt; und

hinter diesen Schmalseiten innerhalb des Körpers Permanentmagnete angeordnet sind, welche die angelegte, aus Stahl bestehende Messerschneide magnetisch festhalten,
ist hier erfindungsgemäß vorgesehen, dass
zum Rollschleifer-Set zusätzlich zum oben beschriebenen Rollschleifer ein solcher Positionierkörper gehört, an dessen Unterseite in den Körpereckenbereichen je eine, als Füßchen dienende flache Platte, insbesondere Scheibe, aus elastischem, haftfähigem Material angebracht ist, um dem Körper eine verbesserte Rutschfestigkeit auf der Unterlage zu verleihen.Starting from a well-known roller grinder set,
comprising a roller grinder and a positioning body to be arranged on a flat surface, with which the knife to be treated can be held in a defined orientation so that a rotating and rotating disc on the surface of the roller grinder can optimally grind or polish the knife edge, this positioning body uniting one
forms essentially cuboid bodies,

• - which has a flat underside,
• - Which has a spaced top, which has a greater length than the bottom, and
• - Which has slanted narrow sides between the underside and the top, whose alignment with the underside includes an angle of 100 to 120 degrees, in particular such an angle of about 105 degrees; and

Permanent magnets are arranged behind these narrow sides within the body, which magnetically hold the knife edge made of steel,
it is provided here according to the invention that
the roll grinder set includes, in addition to the roll grinder described above, such a positioning body, on the underside of which a flat plate, in particular a disc, made of elastic, adhesive material, which serves as a foot, is attached in order to give the body improved slip resistance on the base to lend.

The knife to be ground and / or polished can be kept ready for grinding and / or polishing with a more stable and secure arrangement on the base.

Furthermore, it is preferably provided that the positioning body has a width that is smaller than the length of the handle on the roller grinder; and a concave recess - parallel to the narrow sides - is formed in the upper side of the positioning body, the contour of which is adapted to the round circumference of the cylindrical tube pieces, so that the corresponding grip of the roller grinder can be inserted into this concave recess.

Roller grinder and positioning body can be presented in an attractive form and kept ready.

Figure list

• 1 in schematischer Darstellung eine Seitenansicht eines erfindungsgemäßen Rollschleifers;
• 2 in einer Seitenansicht die auseinander gezogenen Komponenten des Rollschleifers nach 1;
• 3 eine Seitenansicht des Rollschleifers nach 1 mit je einer Draufsicht auf die beiden Scheibenstirnflächen, die einerseits als Schleifscheibe und andererseits als Polier- oder Abziehscheibe ausgebildet ist;
• 4 in Explosionsdarstellung ein Schrägbild der Komponenten einer ersten Ausführungsform eines erfindungsgemäßen Rollschleifers, der ein massives, quaderförmiges Griffstück hat;
• 5 ein Schrägbild einer zweiten Ausführungsform eines erfindungsgemäßen Rollschleifers, der ein zylinderförmiges Griffstück mit erheblicher Wandstärke hat;
• 6 eine Schnittdarstellung des Rollschleifers nach 5;
• 7 anhand einer Schnittansicht in Explosionsdarstellung die Komponenten zur Befestigung eines Kugellagers am Zapfen einer Scheibe;
• 8 anhand einer schematischen Schnittansicht in Explosionsdarstellung die Komponenten einer mehrteiligen Scheibe die an einem zylinderförmigen Griffstück angebracht werden sollen;
• 9 in Explosionsdarstellung ein Schrägbild der Komponenten einer dritten Ausführungsform eines erfindungsgemäßen Rollschleifers, der ein zylinderförmiges Griffstück mit geringer Wandstärke hat;
• 10 ein Schrägbild eines Rollschleifer-Sets in einer Anordnung zum Schleifen einer Messerschneide; und
• 11 je ein Schrägbild eines erfindungsgemäßen Positionierkörpers aus 10.

The invention is explained in more detail below with reference to various embodiments with reference to drawings; the latter show:

• 1 a schematic representation of a side view of a roller grinder according to the invention;
• 2nd the exploded components of the roller grinder in a side view 1 ;
• 3rd a side view of the roller grinder after 1 each with a top view of the two wheel faces, which is designed on the one hand as a grinding wheel and on the other hand as a polishing or honing wheel;
• 4th an exploded view of an oblique view of the components of a first embodiment of a roller grinder according to the invention, which has a solid, rectangular handle;
• 5 an oblique view of a second embodiment of a roller grinder according to the invention, which has a cylindrical handle with considerable wall thickness;
• 6 a sectional view of the roller grinder after 5 ;
• 7 based on a sectional view in an exploded view, the components for fastening a ball bearing on the pin of a disc;
• 8th based on a schematic sectional view in an exploded view, the components of a multi-part disc on one cylindrical handle should be attached;
• 9 an exploded view of an oblique view of the components of a third embodiment of a roller grinder according to the invention, which has a cylindrical handle with a small wall thickness;
• 10th an oblique view of a roller grinder set in an arrangement for grinding a knife edge; and
• 11 each an oblique image of a positioning body according to the invention 10th .

The 1 , 2nd and 3rd schematically show a roller grinder according to the invention 1 which is an elongated straight grip 10th has a disc on each of its two longitudinal ends 40 respectively. 40 ' is rotatably attached and held. The elongated straight handle 10th can be a virtual longitudinal central axis LMA be assigned. The handle 10th ends in the longitudinal direction in two terminal, each to the longitudinal central axis LMA vertically or radially aligned end faces 22 respectively. 22 ' , each with an end section 21st respectively. 21 ' of the handle 10th joins; each of these grip end portions 21st respectively. 21 ' is also referred to below as a handle end piece 20th designated.

On every handle end piece 20th is one disc each 40 respectively. 40 ' rotatably held and stored. Both discs 40 and 40 ' are circular, have the same diameter, are with respect to the longitudinal central axis LMA radially aligned and thus take on the ready-to-use roller grinder a parallel alignment to the substantially vertically aligned knife edge to be treated 80 (see. 9 ) a. Every disc 40 , 40 ' consists essentially of a disc body 41 , one to the handle 10th adjacent inner pane surface 42 has a cone from the center 45 protrudes in the axial direction, the non-rotatably in the inner ring 56 a ball bearing 55 sits with which the disc body 41 on the handle end piece 20th is rotatably held and stored.

Adjacent to the grip face 22 is located on the handle 10th a first disc 40 that one to the handle 10th removed first disc face 43 which is provided with a first abrasive; consequently is on this first disc 40 created a first grinding surface here. Adjacent to the other, opposite grip face 22 ' is located on the handle 10th a second disc 40 ' that one to the handle 10th has a distal disc face that may be formed as another second grinding surface that has different grinding properties than the first grinding surface; or as a honing or polishing surface 44 is formed, which has a flat surface in which elongated curved recesses 44 ' are spared.

With the 4th The first embodiment shown has the roller grinder 1 a handle 10th that from a massive body 11 consists of, for example, made of wood or plastic. The massive body 11 has a body end section on both axial body ends 12 , in which an open, pot-shaped recess 13 is spared by a surrounding pot wall 13 ' and a flat pot bottom is limited. If the ball bearing 55 fixed, but detachable, in this pot-shaped recess 13 are at each end of the body 12 radially adjustable locking means 30th intended. This is in the body end section 12 radial bores 23 recessed that with an internal thread 24th are provided. Here is this locking agent 30th from a machine screw 32 formed in the internal thread 24th is screwed in. The machine screw 32 has a decorative square or hexagon head 33 that on the circumference of the body 11 is present. The machine screw end 34 dips into the recess 13 and firmly contacts the ball bearing outer ring 58 and so holds the ball bearing 55 non-positive in the recess 13 firmly.

The one with the 5 and 6 illustrated second embodiment of a roller grinder according to the invention 1 there is the elongated straight handle 10th from a cylindrical piece of pipe 14 which is a smooth pipe wall 15 with a comparatively large wall thickness; the pipe wall 15 forms a hollow cylinder in each tube wall end section 16 a proportionate hollow cylinder interior 16 ' has a ball bearing in each 55 permanently fixed; the outer bearing ring can be used for this 58 via an adhesive connection on the inner circumference of the pipe wall end section 16 be attached. The inner bearing ring 56 is opposite the pipe wall 15 held rotatable; the disc 40 ' is over the rotationally fixed in the ball bearing inner ring 56 inserted cones 45 rotatable with the pipe section 14 connected. Alternatively, a fixed, but detachable, seat of the ball bearing can also be used 55 in the hollow cylinder interior 16 ' in the end section 16 the pipe wall 15 be provided, as set out below.

The 7 shows means for an exemplary, permanently non-rotatable attachment of a ball bearing 55 on the spigot 45 a disc 40 . In the cone 45 is an axial longitudinal bore 46 is recessed, which has an internal thread 47 is provided with a screw 48 can be screwed in, which is then a washer 49 holds the edge of the ball bearing inner ring 56 fits and thus the disc 40 , 40 ' durable and non-rotatable on the inner bearing ring 56 holds without the rotatability of the disc 40 , 40 ' and inner ring 56 with respect to the outer ring 58 on the ball bearing 55 to affect.

The 8th shows the components of a multi-part disc 40 , namely the disc body 41 , from the inside of the pane 42 a cone 45 protrudes axially. An annular web stands axially from the same inner pane surface 60 from that concentric to the tenon 45 is arranged; There is a gap in the web jacket 62 recessed; there is an external thread on the outside of the web 61 educated. In addition there is a so-called T-ring 63 present, namely a one-piece profile ring with a T-shaped cross section, consisting of T-beams 64 and the T-stem protruding from it at right angles 66 with an internal thread on its inner circumference 67 is provided that in the external thread 61 at the jetty 60 can be screwed in.

The T-beam 64 has an outer circumference 65 with the circumference of the pane on the pane 40 matches. On the T-ring 63 is one of T-beams 64 and T strain 66 limited circumferential shoulder 68 trained in which a ring 50 made of elastic material is used, the outer circumference 51 Has. When screwing on the T-ring 63 to the jetty 60 becomes the ring 50 between the disc body 41 and the T strain 66 clamped and securely held. In this arrangement the ring has 50 an outer circumference 51 which is larger than the circumference of the disk jacket on each disk 40 respectively. 40 ' and which is also larger than the outer circumference 65 of the T-bar 64 on the T-ring 63 . When moving the roller sander 1 each disc rolls on a flat surface 40 respectively. 40 ' on the outer circumference 51 of the ring 50 ; the ring 50 reduces rolling noise and increases the adhesion of the pane 40 , 40 ' to the underlay so that each slice 40 , 40 ' during a back and forth movement of the roller grinder thus equipped, it is set in rotation on the flat surface.

The 9 shows a third embodiment of a roller grinder according to the invention 1 whose handle 10th from a smooth cylindrical piece of pipe 17th exists that has a comparatively small wall thickness of less than 3 mm, typically has a wall thickness of about 0.5 mm to about 1.2 mm. In each end section of the cylindrical tube piece 17th is a plastic body 18th permanently fixed, for example glued in. On / in this plastic body 18th is one to the grip face 22 , 22 ' open cup-shaped recess 19th trained by a surrounding pot wall 19 ' and from a flat pot bottom 19 " is limited. The all-round pot wall 19 ' delimits a hollow cylinder interior 26 in which a ball bearing 55 used, the rotation here with a multi-part disc 40 is connected as above 8th is described. The ball bearing outer ring 58 is permanently stuck or stuck, but detachable, on the surrounding pot wall 19 ' the recess 19th at.

If the ball bearing 55 fixed, but detachable, in the end of the pipe wall 16 of the cylindrical pipe section 14 existing hollow cylinder interior 16 ' sits or in the hollow cylinder interior 26 in the pot-shaped recess 19th that sits in the plastic body 18th exists in the end section on the cylindrical tube section 17th one or more locking devices must be used 30th be provided, which is the ball bearing 55 in the respective hollow cylinder interior 16 ' respectively. 26 holds on. This is exemplified by the figure on the left in 8th shown.

In the end section of the cylindrical pipe section 17th a plastic body sits tightly 18th , in which a cup-shaped (meaning hollow cylindrical) recess 19th is formed by a flat pot bottom 19 " and a surrounding pot wall 19 ' is limited, which in turn is a hollow cylinder interior 26 limited. If the ball bearing 55 on the disc 40 ' - see. the right figure in 7 - Fixed, but detachable, in this hollow cylinder interior 26 19th the ball bearing must be seated 55 of one or more radially aligned and radially adjustable locking means (s) 30 in this hollow cylinder interior 26 be held. For this is in the end section of the pipe section 17 and in the pot wall 19 ' an aligned hole 23 trained with an internal thread 24th is provided. The radially adjustable locking device 30th here is one in the internal thread 24th screwed in and adjustable grub screw 35 . If the grub screw 35 sufficiently far into the internal thread 24th is screwed in, then the grub screw end is 36 firmly attached to the outer circumference of the ball bearing outer ring 58 on and holds the ball bearing 55 non-positive within the recess 19th in the plastic body 18th at the end section of the pipe section 17th firmly. Between the handle end piece 20th and ball bearings 55 a positive locking will be obtained.

After the ball bearing 55 on the spigot 45 attached, remains on the inner surface of the pane 42 a circumferential annular groove 69 between the outer circumference of the ball bearings and the inner circumference of the web. This ring-shaped groove 69 has a sufficient and suitable radial dimension, so in this groove 69 the annular end portion 21st on a cylindrical handle 10th can immerse and with close play or distance to the disc body 42 is arranged; as an annular end section 21st comes here, for example, the annular end portion 16 on a cylindrical piece of pipe 14 or the annular end section on a cylindrical tube piece 17th with attached plastic body wall 19th into consideration.

• - ein ringförmiger Endabschnitt 21 an einem zylinderförmigen Griffstück 10 in eine, an der Scheibeninnenfläche 42 bestehende umlaufende ringförmige Nut 69 eintaucht und darin verborgen und geschützt angeordnet ist; und
• - der Scheibenkörper 41 um einen ringförmigen Endabschnitt 21, der sich an einem ortsfest gehaltenen, zylinderförmigen Griffstück 10 befindet, und der in eine umlaufende ringförmige Nut 69 an der Scheibeninnenfläche 42 eintaucht, ungehindert rotieren kann.

An arrangement is obtained in which

• - an annular end portion 21st on a cylindrical handle 10th in one, on the inside of the pane 42 existing circumferential annular groove 69 immersed and hidden and protected therein; and
• - the disc body 41 around an annular end portion 21st , which is on a stationary, cylindrical handle 10th located, and in a circumferential annular groove 69 on the inner surface of the pane 42 immersed, can rotate freely.

It also has the inner surface of the pane 42 protruding annular web 60 sufficient axial dimension so that this web 60 the am, in the space 69 immersing pipe section end section existing hole (s) 24th and covers the grub screw (s) 35 inserted therein, as long as the T-stem 66 not yet on the dock 60 is screwed on. In the jetty 60 is at least a gap 62 trained through which access to a hole 24th and the grub screw inserted in it 35 is possible as long as the T stem 66 not yet on the dock 60 is screwed on.

For assembling a second or third embodiment of a roller grinder according to the invention equipped in this way 1 will be the T-ring first 63 on the end section on the respective pipe section 14 or 17th postponed; then the ring 50 in the shoulder 68 on the T-ring 63 inserted; then the disc 40 , 40 ' applied to the pipe section end portion, wherein the annular pipe section end section into the annular groove 69 immersed; then there will be a gap 62 aligned with a hole in the annular web 23 aligned in the pipe section; within that gap 62 becomes a grub screw 35 sufficiently deep into the internal thread 24th at the hole 23 screwed in until the grub screw end 36 firmly attached to the outer circumference of the ball bearing outer ring 38 is present; then finally the T-ring 63 Towards the disc 40 , 40 ' shifted and with its internal thread 67 on the external thread 61 at the jetty 60 screwed on.

In the arrangement thus created, the pipe section end section is on the cylindrical pipe section 14 or 17th from the annular web 60 on the multi-part disc 40 , 40 ' edged and surrounded; between the hollow cylinder outer circumference on an annular piece of pipe 14 or 17th and the inner circumference on the annular web 60 there is only a narrow gap into which dirt particles and other solids cannot penetrate; the adjacent T-bar 64 is optically as part of the disc 40 , 40 ' perceived; it will have a clean appearance and a hidden and protected arrangement of the pipe end portion within the annular groove 69 in / on the disc body 41 receive; on the handle 10th rotatably held and mounted disc 40 , 40 ' can freely around the stationary handle 10th rotate.

To the roll grinder set

The roller grinder is a hand-operated device for grinding and / or polishing a knife edge. Overall, with each embodiment of the roller grinder according to the invention described above 1 such training provided that each slice 40 , 40 ' can roll on a flat surface and with respect to the handle 10th rotates when the user has placed this roller grinder on this surface and then the handle 10th grabs with fingers of one hand and thus the roller grinder 1 moved back and forth on and along this support, on which the knife to be treated is held in a defined arrangement, and one of the rotating disk surfaces 43 or 44 the cutting edge contacts and grinds or polishes. In the case of a roller grinder set according to the invention, in addition to the roller grinder, a positioning body to be arranged on the flat base is provided, with which the knife to be treated can be held in a defined orientation, so that a disc that rolls and rotates on this base 40 or 40 ' can optimally grind or polish the knife edge.

• - der eine ebene Unterseite 71 hat,
• - der eine dazu beabstandete Oberseite 74 hat, die eine größere Länge aufweist, als die Unterseite 71, und
• - der zwischen Unterseite 71 und Oberseite 74 schräggestellte Schmalseiten 75 und 75' hat, deren Ausrichtung mit der Unterseite 71 einen Winkel von 100 bis 120 Grad, insbesondere einen solchen Winkel von etwa 105 Grad einschließt; und

hinter diesen Schmalseiten 75 und 75' innerhalb des Körpers 70 Permanentmagnete angeordnet sind, welche die angelegte, aus Stahl bestehende Messerschneide 80 magnetisch festhalten.With reference to the 10th and 11 Such a positioning body is explained below. As shown, this positioning body forms a substantially cuboid body 70

• - the one flat bottom 71 Has,
• - The one spaced top 74 has a greater length than the bottom 71 , and
• - the one between the bottom 71 and top 74 slanted narrow sides 75 and 75 ' has its alignment with the bottom 71 includes an angle of 100 to 120 degrees, in particular such an angle of approximately 105 degrees; and

behind these narrow sides 75 and 75 ' inside the body 70 Permanent magnets are arranged, which are the applied steel knife edge 80 hold magnetically.

• - konkave Aussparung 76 ausgebildet ist, deren Kontur an den runden Umfang der zylindrischen Rohrstücke 14 oder 17 angepasst ist, so dass das entsprechende Griffstück 10 des Rohrschleifers 1 in diese konkave Aussparung 76 eingelegt werden kann.

According to the invention,
that at the bottom 71 of the body 70 a flat plate, in particular a disc, in the corner regions thereof 72 Made of elastic, adhesive material is attached to the body 70 to provide improved slip resistance on the surface. Furthermore, it is preferably provided
that the body 70 has a width that is smaller than the length of the handle 10th on the roller grinder 1 ; and
that in the top of the body 74 one - to the narrow sides 75 and 75 ' parallel

• - concave recess 76 is formed, the contour of the round circumference of the cylindrical tube pieces 14 or 17th is adjusted so that the corresponding handle 10th of the pipe grinder 1 into this concave recess 76 can be inserted.

Reference symbol list

1

Roller grinder

10th

Handle

11

solid body (as a handle 10th )

12

Body end section (of the massive body 11 )

13

pot-shaped recess (in the body end section 13 )

13 '

all-round pot wall (the recess 13 )

14

cylindrical pipe section with large wall thickness (as a handle 10th )

15

smooth pipe wall (of the pipe section 14 )

16

round end section (the pipe wall 15 )

16 '

Hollow cylinder interior (in the pipe section 14 )

17th

cylindrical tube with a small wall thickness (as a handle 10th )

18th

Plastic body (in the pipe section 17th )

19th

pot-shaped recess (in the plastic body 18th )

19 '

all-round pot wall (the recess 19th )

20th

Handle end piece

21, 21 '

End section (of a handle 10th )

22, 22 '

Face (of a handle 10th )

23

radial bore (in the handle end piece 20th )

24th

Internal thread (in the radial bore 23 )

25th

open cavity (to the handle end face 22 there)

26

Hollow cylinder interior (inside the pot-shaped recess 19th )

30th

Locking means

32

Machine screw (as a locking device 30th )

33

Head of the machine screw 32

34

End of machine screw 32

35

Grub screw (as a locking device 30th )

36

End of the grub screw 35

40, 40 '

disc

41

Disk body (a disk 40 , 40 ' )

41 '

Outer circumference (of the disc body 41 )

41 "

circumferential groove (on the outer circumference 41 ' in the disc body ( 41 )

42

Inner surface (of a disc 40 , 40 ' )

43

Face (a disc 40 , 40 ' )

44

Honing or polishing surface

44 '

elongated recess on the honing or polishing surface 44

45

Cones

46

Longitudinal bore (in the tenon 45 )

47

Internal thread (on the longitudinal bore 46 )

48

Screw (in internal thread 47 )

49

Washer (on the screw 48 )

50

elastic ring

51

Outer circumference (of the ring 50 )

55

ball-bearing

56

Inner ring (of the ball bearing 55 )

58

Outer ring (of the ball bearing 55 )

60

circumferential annular web (on the inner surface 42 a disc 40 , 40 ' )

61

External thread (on the web 60 )

62

Gap (in the jetty 60 )

63

T-ring

64

T-beam (of the T-ring 63 )

65

Outer circumference (of the T-bar 64 )

66

T-stem (of the T-ring 63 )

67

Internal thread (on the T-trunk 66 )

68

outer step (limited by T-beams 64 and T strain 66 on the T-ring 63 )

69

annular groove (between ball bearing 55 and footbridge 60 )

70

Positioning body (of the roller grinder set for holding a knife)

71

Body (of the positioning body 70 )

72

Underside (of the body 71 )

73

flat plates or disc (s) (on the underside 72 of the body 71 )

74

Top (of the body 71 )

75, 75 '

Narrow sides (of the body 71 )

76

concave recess (in the top 74 of the body 71 )

80

Knife edge (on the knife to be treated)

LMA

Longitudinal central axis of the elongated handle 10th .

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• GB 437733 A [0003]
• DE 102016009482 B4 [0004, 0005]

Claims (21)

Roller grinder, namely a manually operated device for grinding and / or polishing a knife edge, with an elongated, straight handle (10) to which a virtual longitudinal central axis (LMA) can be assigned in the longitudinal direction and which has two, spaced apart handle ends in this longitudinal direction, on each of which a circular disk (40 and 40 ') is rotatably attached and held, which has an end face (41) which is removed from the handle (10) and which is designed as a grinding face (43) in one disk (40), and which is formed in the other wheel (40 ') as a honing or polishing surface (44) or as another grinding surface, which has different grinding properties than the one grinding surface (43), and - overall such an arrangement is provided that each wheel (40, 40 ') can roll on a flat surface and rotate with respect to the handle (10) when the user places the roller grinder (1) on this surface and the handle (10) with Grips fingers of one hand and thus moves the roller grinder (1) back and forth on this surface on which the knife to be treated is held in a defined arrangement, and one of the rotating disc surfaces (43 or 44) contacts and grinds or polishes the cutting edge, thereby characterized in that each disc (40, 40 ') has a centrally located, axially projecting pin (45); there is also a ball bearing (55) having an inner ring (56) and a larger outer ring (58); the pin (45) is inserted into the inner ring (56) on the ball bearing (55) and is permanently held in a rotationally fixed manner therein; for the rotatable attachment and mounting of a disc (40, 40 ') equipped in this way to the grip (10) - the grip (10) has a grip end (20) at each grip end, which ends at a grip face (22); - In this handle end piece (20) to the handle end face (22) open cavity (25) exists or is created; and - the ball bearing (55) provided with the attached disc (40, 40 ') is inserted into this cavity (25) and is permanently stuck or stuck, but releasably, arranged and held therein; and if the ball bearing (55) is stuck but detachably arranged in the cavity (25) on the handle end piece (20), there is at least one radially oriented and radially adjustable locking means (30) which is a locking means end piece which can penetrate into the cavity (25) (31) has; and this adjustable locking means (30) can be brought into a position in which the locking means end piece (31) lies tightly against the outer ring (58) of the ball bearing (55) and thus holds the ball bearing (55) in the cavity (25) by means of a force-locking lock. Roller grinder after Claim 1 , characterized in that the ball bearing (55) is a single-row deep groove ball bearing whose inner ring (56) has an inner diameter of 10 mm to 20 mm. Roller grinder after Claim 1 or 2nd , characterized in that the pin (45) is roller-shaped and fits into the inner ring (56) on the ball bearing (55) with close play. Roll grinder according to one of the Claims 1 to 3rd , characterized in that each disc (40, 40 ') has a disc body (41); and the pin (45) is integrally formed and connected to the disc body (41). Roll grinder according to one of the Claims 1 to 4th , characterized in that an axial longitudinal bore (46) is recessed in the pin (45), which is provided with an internal thread (47) into which a screw (48) is screwed which holds a washer (49) which holds on the inner ring of the ball bearing (56) and thus holds the disc (40, 40 ') permanently and non-rotatably on the ball bearing inner ring (56) without the rotatability of the disc (40, 40') and inner ring (56) with respect to the outer ring (58) on the ball bearing (55 ) affect. Roll grinder according to one of the Claims 1 to 5 , characterized in that the disk body (41) has a disk jacket (41 '); and a radial, circumferential groove (41 ") is formed in the disk jacket (41 '), into which a ring (50) made of elastic material is firmly inserted such that an outer circumference (51) of the ring (50) over the The disk jacket (41 ') protrudes. Roll grinder according to one of the Claims 1 to 5 , characterized in that the disc body (41) has an inner disc surface (42) adjacent to the handle (20); from this inner disc surface (42) in addition to the pin (45) an annular web (60) protrudes in the axial direction, - which is integrally formed with the disc body (41); - Which is arranged concentrically to the pin (45); and - which is provided on its outer circumference with an external thread (61); and in addition there is a so-called T-ring (63), namely a one-piece profile ring with a T-shaped cross section, consisting of T-bars (64) and at right angles therefrom projecting T-trunk (66), which is provided on its inner circumference with an internal thread (67) which can be screwed into the external thread (61) on the web (60). Roller grinder after Claim 7 , characterized in that the T-beam (64) has an outer circumference (65) which coincides with the outer circumference of the window jacket (41 '). Roller grinder after Claim 7 or 8th , characterized in that an outer step (68) delimited by the T-bar (64) and the T-stem (66) is formed on the T-ring (63); a ring (50) of elastic material is inserted in this step (68); and when the T-ring (63) is screwed onto the web (60), the ring (50) is clamped between the inner surface of the pane (42) and the T-stem (66); and the ring (50) in this arrangement has an outer circumference (51) which is larger than the outer circumference (41 ") of the disk jacket (41 ') and the T-bar (64) on the T-ring (63). Roll grinder according to one of the Claims 1 to 9 , characterized in that the elongated, straight handle (10) - has a length of 50 mm to 100 mm, - furthermore has a cross-sectional dimension of 25 mm to 50 mm; and the handle (10) is delimited in the longitudinal direction by a respective end, radially oriented end face (22); and the end section (21) of the handle (10) adjoining each of these end faces (22) forms a handle end piece (20) in which a cavity (25) open to the handle end face (22) exists or is created. Roller grinder after Claim 10 , characterized in that the elongated, straight handle (10) is a cylindrical tube (14) with an inner diameter of about 28 to about 42 mm, which has a smooth tube wall (15) with a wall thickness of 4 to 8; and each end section (16) of this tube wall (15) forms a handle end piece (20) in which there is a cylindrical cavity (25) into which the radially aligned ball bearing (55) is inserted. Roller grinder after Claim 10 , characterized in that the elongated, straight handle (10) forms a solid body (11) which has a round or polygonal, in particular square, cross section; and in each body end piece (12) of this solid body (11) an open pot-shaped recess (13) is formed, which is delimited by a flat pot bottom and by a circumferential pot wall (13 '), and which has a hollow cylinder interior (26) in the handle piece end piece (20) provides; and the ball bearing (55) is inserted into this hollow cylinder interior (26) in such a way that the ball bearing outer ring (58) is arranged close to the circumferential cup wall (13 '). Roller grinder after Claim 10 , characterized in that. the elongated, straight handle (10) is a cylindrical, stainless steel tube (17) which has a wall thickness of less than 3 mm and which has an inner circumference with an inner diameter of less than or equal to about 49 mm; and in each end section of this tube piece (17) a plastic body (18) is fixedly inserted, in which an open cup-shaped recess (19) is formed, which is delimited by a circumferential cup wall (19 '), and which has a hollow cylinder interior (65) provides in the handle end piece (20); and the ball bearing (55) is inserted into this hollow cylinder interior (26) in such a way that the ball bearing outer ring (58) is arranged close to the circumferential cup wall (19 '). Roller grinder after Claim 12 or 13 , characterized in that an adhesive connection is created between the outer circumference on the ball bearing outer ring (58) and the circumferential cup wall (13 ', 19'), which holds the ball bearing (55) permanently firmly in the hollow cylinder interior (26). Roll grinder according to one of the Claims 1 to 14 , characterized in that at least one radially oriented and radially adjustable locking means (30) is provided on the handle end piece (20), for which purpose at least one radial bore (23) is recessed in the handle end piece (20), on which an internal thread (24) is formed; the locking means (30) which is radially oriented with respect to the cavity (25) or the hollow cylinder interior (26) is a screw which has a screw end; and this screw can be screwed into this internal thread (24) to such an extent that the screw end penetrates into the cavity (25) or into the hollow cylinder interior (26) and lies tightly against the ball bearing outer ring (58) and thus creates a non-positive locking to the ball bearing (55), which prevents removal of the ball bearing (55) with attached disc (40, 40 ') from the handle end piece (20). Roller grinder after Claim 15 , characterized in that the locking means (30) is a grub screw (35) which, when screwed into the internal thread (24), can be countersunk in a round handle end piece (20) which extends from the end section (16) of the tube wall (15) on the tube piece ( 14) or from the end section of the pipe section (17) with the adjacent cup wall (19 '). Roller grinder after Claim 15 or 16 , characterized in that around the circumference of a round handle end piece (20) there are three locking means (30) which are each arranged at a distance of 120 degrees from one another. Roller grinder after Claim 7 , characterized in that a circumferential annular groove (69) is created on the disc body (41) between the outer circumference of the ball bearing and the inner circumference of the web, said groove having an axial depth greater than 6 mm and having a sufficient radial width so that a round end section (21 ) on a handle (10), here in particular a round end section (21), which extends from the annular end section (16) of the tube wall (15) to the tube section (14) or from the annular end section of the tube section (17) with the cup wall (19 ') is formed; and the disc body (41) including the web (60) can rotate freely with tight play against the stationary grip (10) including the round end section (21) which dips into the groove (69). Roller grinder after Claim 18 , characterized in that in the annular web (60) there is a gap (62) through which the internal thread (24) in the respective round handle end piece (20) and the grub screw (35) to be screwed therein is accessible as long as the T- Trunk (66) with its internal thread (67) has not yet been screwed onto the external thread (61) on the annular web (60). Roller grinder set, comprising a roller grinder and a positioning body to be arranged on a flat surface, with which the knife to be treated can be held in a defined orientation so that a rotating and rotating disc on the roller grinder can optimally grind or polish the knife edge, whereby this positioning body forms a substantially cuboid body (70), - which has a flat underside (71), - which has an upper side (74) spaced apart therefrom, which has a greater length than the underside (71), and - the between The underside (71) and top side (74) have slanted narrow sides (75 and 75 '), the alignment of which with the underside (71) includes an angle of 100 to 120 degrees, in particular such an angle of about 105 degrees; and behind these narrow sides (75 and 75 ') inside the body (70) permanent magnets are arranged, which magnetically hold the knife edge (80) made of steel, characterized in that a roller grinder (1) according to one or more of the above Claims 1 is provided at 19; and a flat plate or disk (72) made of elastic, adhesive material is attached to the underside (71) of the body (70) in the corner regions thereof in order to give the body (70) improved slip resistance on the base. Roller grinder set after Claim 20 , characterized in that the body (70) has a width which is smaller than the length of the handle (10) on the roller grinder (1); and in the upper side of the body (74) a concave recess (76) is formed - parallel to the narrow sides (75 and 75 '), the contour of which is adapted to the round circumference of the cylindrical tubular pieces (14 or 17), so that the corresponding grip piece (10) of the pipe grinder (1) can be inserted into this concave recess (76).

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