EP1439271A2 - Knife for sealings - Google Patents

Abstract

The knife grip (1) protrudes from one side of the blade (2) at an angle to the blade plane. The blade comprises a flat plate.

Description

The invention relates to a seal meter with the generic features of claim 1.

In building construction, joints are sealed between Tiles, abutting wall corners, between Bathtub edges and an adjacent wall, Kitchen countertops and an adjacent wall and similar seals made of acrylic or silicone on the abutting walls applied. Owing to Signs of aging need these silicone joints from time to time Time, ideally every five years, the ingress of mold between the surface and prevent the sealant.

To remove such seals are usually like 4 outlined knife used from a handle 1 made of plastic and a blade 2 inserted therein a cutting edge 3 on the underside. At a such knife used is the blade 2 as needed can be pushed out of handle 1. In addition, the blade 2 Predetermined breaking points so that after the wear of the Cutting edge at the front end of the blade 2 this front End can be broken off with a new front end to provide a sharp cutting edge. The stake however, this knife for removing seals is very disadvantageous since a seal is best removed when the cutting edge 3 of the blade 2 below the sealant over the flat substrate supporting the sealing compound can be performed lengthways. The fact that the blade 2 in Longitudinal protrudes from the handle 1, the handle 1 wider than the blade 2 and the handle 1 also from the hand of cutting person is gripped, the blade 2 to to reach this cutting position, far from the handle 1 pushed out and under the influence during cutting a lateral pressure on the handle 1 bent to the side become. This not only leads to uneven Bending while cutting on residues of the sealant remain on the surface and are subsequently removed must, but also leads to the fact that by tilting the Blade, especially the cutting edge, the surface is scratched. Removing the 'gasket with such a Knife is therefore very time consuming, which is why seals usually not exchanged at reasonable intervals become. In addition, the use is due to the risk of breakage Blade dangerous when subjected to lateral bending.

As a special joint or sealing knife is also a 5 outlined device known in the Front view from the top triangular hollow profile tapering to the rear 4 consists. Two adjacent side walls are in the top Area designed as cutting edges 3. The rear one of the Cutting edges 3 removed section of the hollow profile 4 is as Handle 1 trained. To a seal from the Transition area between two rectangular ones To remove walls, this gasket knife is on the handle detected and with the two cutting edges 3 on the two abutting walls that cover the underground of the Form seal, guided along. The loosened seal occurs in the interior of the hollow profile 4, this for Removal of the sealant in the third peripheral wall has an outlet opening 5. This special However, gasket knife is also disadvantageous in the Application. The hollow profile 4 is made of plastic, which the Cutting edges 3 are not sufficiently sharp to Lift the sealant clean off the surface. Moreover hard bumps on the surface damage the Cutting edges 3, so the sealing knife only very is permanently applicable. Another disadvantage is that this hollow profile 4 with the two in a fixed Cutting edges 3 at an angle to one another only for walls with an appropriate angle between them can be. Seals between the top of one Bathtub, which is usually not a level but an easy one has an arcuate surface, and an adjacent Room wall are with the two mutually rigid cutting edges 3 difficult or impossible to lift with one cut.

Generally known as cutting tools of a different type also hand shavers that have a razor head that one of them in a lateral direction to the cutting plane protruding handle. The razor head carries one Razor blade for shaving body hair. in this connection however, it is a device that works with both Look at the technical requirements as well Field of application deviating far from that considered above The purpose of a sealing knife lies and therefore for the the following considerations for the expert with an eye on a variety of specials in the construction and Material selection as not obvious for a takeover of Characteristics can be seen.

DE 198 58 383 A1 describes a tool for removing Silicone grout known, which of the essential Features forth the joint knife described with reference to FIG. 5 equivalent. Two are essential for the tool mutually arranged cutting parts, which are 90 ° Form the blade arrangement. In one to the two Cutting parts center symmetrical and a 45 ° Blade angle to the plane forming the two cutting parts a handle for guiding the cutting parts is provided. The Both cutting parts can be caused by the 90 ° angle along the surfaces of a floor and one towering Wall are led to one in their transition area remove the existing silicone joint.

This tool also has the problem that the Use only with adjacent walls with one appropriate angle between these can be used. As soon as the angle between the walls is less than 90 °, the silicone joint cannot be removed to the far corner become. If the angle is greater than 90 °, two Cuts are made with the tool once lengthways of the floor and once along the wall.

Another disadvantage is that the cutting body from one Form plastic or with a plastic coating is to be provided in order to prevent that on one of the Scraper strips through metal parts of a walls Be left behind. This problem will straight through the two arranged at 90 ° to each other Cutting body reinforced with the cutting edges, with adjacent walls with an angle smaller 90 ° scratches on the surface or the wall, what is not currently being cut, inevitably by the adjacent or repeatedly abutting edge of the not over this surface sliding cutter body are caused.

DE 197 24 975 C2 is a screed edge strip cutter known, which is a non-generic tool is. To achieve effective sound insulation, protrudes a side insulation layer over a screed top between a screed and an adjacent wall. The insulation layer must be so far over the The top of the screed protrude like a floor covering later the top of the screed is to be placed. Accordingly, the edge strips protruding from the screed not at the level of the Screed, but with a predetermined distance above the Cut screed. For this purpose, a cutting knife in the locked required height on the carrier, d. H. a The cutting edge is above one above the screed sliding guide plate of the tool. The cutting body is therefore not over the underground, but parallel to the Ground and spaced apart along the side wall guided.

Another disadvantage is that a handle on the various known tools is always firmly locked on the tool and therefore no variable guidance in the case of poorly accessible Border areas is made possible.

The object of the invention is a sealing knife for simplified and efficient handling structurally that seals within a significantly improved can be lifted off a surface for a shorter period of time can.

This task is performed by the sealing knife with the Features of claim 1 solved.

The starting point is a seal meter with a Cutting edge for lifting a seal from one Cutting surface and with a handle to Guide the cutting edge over this surface. Doing so a cutting body, in particular a cutting plate with the Cutting edge on at least one peripheral side of the Cutting body provided and a handle on it attached that this from one side of the cutting body in protrudes laterally to the cutting plane. to Improvement is the cutting edge on one Cutting body, which with a laterally protruding handle can be routed evenly over the surface. Depending on Width of the cutting body and the corresponding cutting edge the handle can be used by at least one of the two lateral edges of the cutting edge are spaced such that the cutting edge has a Hand easily up to an angle of two angled abutting surfaces can be performed. Self for substrates that are less than rectangular The cutting edge is at an angle to each other correspondingly not too thick cutting body yet easily into the rearmost areas of the To lead over which the cutting edge to Removing the seal is performed. In a next one The cutting edge is then over the led adjacent underground and thus the seal easily with two easy to use forward and / or Back movements of the gasket knife from the Walls solved.

The actual cutting body as a flat insert to form at least one beveled cutting edge, enables production by means of simple powder metallurgical or powder ceramic processes. Advantageously, a flat cutting insert can also extend up to led into angular areas of two adjacent walls become. Through the flat surface of the insert the front bevelled cutting edge can Cutting insert advantageously also particularly evenly and guided closely over the surface so that scratches like when using a Knife with protruding and laterally bent blade or a slightly tilted hollow profile avoided can be. Advantageously, none remain Gasket remnants on a flat surface.

In particular, a subsequent one is usually not required Recutting any remaining gasket residues, as with Working with a knife from a handle with in Blade protruding longitudinally usually remain. Even damaging the surface of the Scratches are avoided.

Since the cutting body with the cutting edge in particular as Cutting plate by simply pressing metal powders or Ceramic powders and subsequent sintering can be made can, is also providing a sufficiently sharp and cutting edge resistant to damage guaranteed simple technical means.

Advantageous refinements are subject-dependent Expectations.

Cutting edges on two opposite sides of the Training the cutting body offers the particularly advantageous Possibility of cutting with a forward movement Lift off the sealing compound from the substrate and possibly remaining gasket remnants with a short To finally lift the backward movement from the ground.

Cutting edges on at least two directly adjacent sides training the cutting body makes it particularly possible effective use when working in corners where three Butt the room walls together. With a longitudinal movement to the Lifting a seal up to the corner can be the first Gasket lifted off between two adjacent walls become. Once in the corner, the seal knife needs just to be moved to the right or left, too to lift off the seal on the same surface and the other wall in the corner is formed.

Attach the handle firmly to the cutting body or training offers the possibility of a simple and To provide inexpensive tools, for example to be pressed in one piece using powder metallurgy. For inexperienced The handle, firmly attached to the cutting body, offers users also a stable guidance of the cutting edge or flat cutting body on the underside over the subsurface.

However, according to one embodiment, preference is given to independent inventive design a Handle bracket, which is a pivotable attachment of the Grip on the cutting body allows as this Areas of application of the sealing knife during handling especially expanded by experienced people. Went out is also from a seal meter with a Cutting edge for lifting a seal from one Cutting surface and with a handle to Guide the cutting edge over this surface. Also at this embodiment is a cutting body, in particular a cutting plate with the cutting edge on at least one Provided peripheral side of the cutting body and a handle attached to it in such a way that it is from one side of the Cutting body in the lateral direction to the cutting plane projects. If the handle according to this embodiment in a Plane to the side of the cutting direction, d. H. in one level can be pivoted parallel to the cutting edge in the cutting plane is, the cutting body, in particular a flat Cutting insert, lighter in edge areas between two colliding walls are led. The handle gripping hand can be laterally pivoted hinged handle may even be wider than the distance of the Grip circumference to the outer side of the cutting edge.

A handle in both planes is particularly preferred perpendicular to the cutting direction, d. H. in both levels parallel to the cutting edge from the perspective of the cutting plane, is pivotable. This can be done, for example, by a Ball head bearing of the handle on the cutting body become.

A seal meter with a first is advantageous Handle holder element which protrudes from the cutting body and has a bearing section, with a second Handle mounting element that has a spherical head on the front has, which is mounted on the bearing section, and with a cap that the first and the second Grip holder element holds together and a side opening for pivoting execution of the Ball head adjacent handle bracket portion of the second Has handle bracket element.

Advantageously, releasable attachment of the Handle on the insert replacing the cutting body with the cutting blade, so that only the actual cutting body is to be replaced. In one accordingly with a reserve cutting body holder trained handle can use replacement blades for this purpose or replacement cutting bodies are provided.

The cutting body, in particular a plate-shaped cutting body, made of a ceramic or metallic material, which is an inexpensive Manufacturing on the one hand and high stability on the other the cutting edge against damage caused by unevenness of the substrate under the seal to be lifted off.

According to a further independent embodiment a sealing knife, in which between a rigid portion of the handle and the cutting body elastic section is arranged or at least one Part of the handle is designed to be elastic Allow the handle to pivot in one plane perpendicular to the cutting direction. Let's start with that also from a sealing knife with a cutting edge for lifting a seal from a cutting plane spreading surface and with a handle for guiding the Cutting edge over this surface. According to two particularly preferred variants are the elastic section as an independent element between the handle and the Arranged cutting body, for example as part of a Handle bracket. According to the second particularly preferred The handle itself or a section of it becomes a variant formed such that it is elastic. The elasticity allows, in particular, that of the cutting body handle section or handle facing away from the Cutting plane or the cutting body can be pivoted.

Fig. 1

perspektivisch eine einfache Ausführungsform eines Fugenmessers beim Einsatz zum Abheben einer Dichtung von einem Untergrund;

Fig. 2

eine seitliche Vorderansicht eines bevorzugten Dichtungsmessers;

Fig. 3

eine seitliche Seitenansicht dieses Dichtungsmessers;

Fig. 4

ein für das Abheben von Dichtungen üblicherweise verwendetes Messer gemäß dem Stand der Technik und

Fig. 5

ein spezielles Dichtungs- bzw. Fugenmesser in Form eines Hohlprofils gemäß dem Stand der Technik.

An embodiment of the invention is explained below with reference to the drawing. Show it:

Fig. 1

perspective a simple embodiment of a joint knife when used to lift a seal from a substrate;

Fig. 2

a side front view of a preferred gasket knife;

Fig. 3

a side view of this sealing knife;

Fig. 4

a knife commonly used for lifting seals according to the prior art and

Fig. 5

a special sealing or joint knife in the form of a hollow profile according to the prior art.

As can be seen from Fig. 1, there is a sealing or joint knife for removing a sealant 13 from a base 11 in the simplest case from a handle 1 and a cutting body 2 with one or two cutting edges 3. In the particularly preferred embodiment is the Cutting body 2 from a flat cutting plate, as in the tool processing technology is known for itself.

As can be seen from FIG. 1, the cutting body 2 using the handle 1 in the cutting direction S over a Substrate 11, which forms a first wall, moves. In the transition area between this first wall 11 and a second, for example arranged perpendicular to it Wall 10 with a corresponding surface is one slot-shaped joint 12 formed. This joint can be in usual way almost sealing but also with a Slot width of possibly several millimeters be trained. In order to seal the joint 12, a Sealant, especially made of silicone or acrylic in the Transitional area between the two walls 11, 10 applied. Due to signs of aging Grout will become brittle over time. Also separate due to thermal movements and moisture effects Surface of the walls 11, 10 and the corresponding one Underside of the sealant or joint seal 13 with the Time from each other. This allows intrusion of Moisture and mold. Therefore, the Joint seal 13 removed at regular intervals and to be renewed.

As this is shown, the removal of the Joint seal 13 of the plate-shaped cutting body 2 in Cutting direction S moves over the surface 11, whereby the Joint seal 13 using the cutting edge 3 from the substrate 11 neatly separated, especially lifted off or cut off becomes. The side wall of the cutting body 2 guided along the side wall 10. In the cutting body 2 is then a second cutting step guided the underground of the second wall 10 and thus the Joint seal 13 also detached from the second wall 10. How this is evident, the use of one is possible flat cutting body 2 particularly advantageous.

A handle bracket 7 for attaching the handle 1 to the Cutting body 2 consists in the simplest form of a Weld. A one-piece is also possible Manufacturing, for example powder metallurgy, by the Compressing metal powder in an appropriately shaped Die. The manufacture of the sealing knife is natural also with other materials, for example ceramic Materials, possible. The training or attachment of the Handle 1 on the cutting body 2 is advantageously carried out with such a large distance d from that in the cutting direction S lateral wall of the cutting body 2 that grasping of the handle 1 is still possible with one hand without the Hand bumps against the second wall 10.

As shown in FIGS. 2 and 3, one has particularly preferred embodiment has a handle 1, which is removably arranged on the cutting body 2. at the illustrated embodiment enables the Handle holder 7 the replacement of the cutting body 2, which with the help of a screw connection 71 - 73 on the Handle bracket 7 is attached. A screw 71 leads from the underside of the cutting body 2 through a bore 72 through this and through a threaded bore 73 through the Handle bracket 7 'for fastening them together. Of course, there are other detachable mounting options used.

In the most preferred embodiment, the handle is 1 compared to the cutting body 2 about at least one axis S. pivotable V arranged. For this purpose, the handle 1 on the Cutting body 2 using a handle holder 7 with a Articulated mechanism attached.

To the pivotable mounting of the handle 1 on the To enable the cutting body 2, the handle holder 7 according to the exemplary embodiment only arcuate portion 74 which one at the front Handle end of the handle 1 attachable cross bolt 11. The cross pin 11 forms in connection with the inner peripheral wall of the arc-shaped handle holder 7, 74 a handle bearing. In the central section of the arcuate wall 74 has a through opening 75 through which a front handle portion of the handle 1 protrudes to the bolt-shaped section 11.

In the embodiment shown, the handle is 1 pivotable in a plane V relative to the cutting body 2, which is spanned perpendicular to the cutting direction S.

As a result, even with a small distance d between the Attachment point of the handle 1 on the cutting body 2 to one adjacent wall 10 to be enabled to work which one hand of a person operating the joint knife the upper handle section of handle 1 is pivoted as far as that the hand is no longer against the side second wall 10 bumps.

Of course, any other form of a Swiveling or articulation mechanism can be used. To counts in particular a pivoting additionally or only in one plane parallel to the side wall 10.

In a not shown and more preferred Embodiment is a ball head instead of a bolt 11 used which of the handle bracket 7 instead of Bolt 11 is added. With an appropriately shaped Opening 75 in the upper arcuate portion 74 of the Handle holder 7 is then also a pivoting of the handle in a second plane, which is determined by the cutting direction S and the parallel wall 10 is spanned, possible.

As can be seen from Fig. 2, the handle 1 in its end spaced from the cutting body 2 also one Holder 12 for replacement cutting body 2 * for exchanging one Have cutting body 2 with worn cutting edge 3. The corresponding handle section is expedient for this purpose constructed in two parts, the two parts for example are screwed together to hold the reserve or replacement cutting body 12 while removing one Seal grout or storage.

According to a further embodiment, the handle is or Section of the handle facing away from the cutting body relative to the cutting body or the cutting plane via a elastic section pivotally arranged. The elastic section can be part of a Handle holder, especially as a standalone Component between an actual handle and the Cutting body may be used. According to another A variant of the handle can also be a section or the entire handle made of an elastic material be made, in particular that of the cutting body section of the handle facing away from the cutting body or pivot the starting point on the cutting body can. For example, as an elastic section Serve spring wire, which between the cutting body and the Handle is welded. The spring wire acts on one Tilting movement of the handle in relation to the cutting body similar to an elastic joint. A can also be used flat elastic section, this one in particular two-dimensional pivoting of the handle in the Comparison to a three-dimensional swiveling of the handle in the case of a spring wire. In addition to the use of metallic elastic sections is also the use elastic sections made of other elastic materials, especially plastics possible.

According to a further advantageous embodiment, the Sealing knife or the device for lifting a Grouting, in particular silicone grouting, a handle bracket on which a part is fixed to the cutting body connected is. For example, protrudes from the cutting body of the surface of which is a pin-shaped approach with a Ball head away. This pin-shaped approach can, for example be formed in one piece with the cutting body or subsequently attached to the cutting body, in particular be welded on. The handle or another part of the Handle holder has a receptacle with which the spherical section of the first element of the handle holder is gripped so that the handle or the second part of the Handle holder in a manner known per se Ball joint is coupled. Alternatively, the coupling via a ball head can also use another form of attachment of the handle on such a protruding from the cutting body Element be formed.

A reverse arrangement of, for example, one Grip element with a front ball head and one Handle holder with an element for receiving the ball head is advantageous to train. In such an embodiment is, for example, a handle holder on the Fixed cutting body, for example through an opening in screwed to the cutting body or on the top welded or formed in one piece with this. The handle holder element has a receptacle for the Ball head, the receptacle preferably consisting of a cap or sleeve with a side opening for one front section of the grip element is formed. The assembly takes place in this embodiment by Place the ball head on the corresponding one Pick-up area of the handle holder and the subsequent Slip on the cap. The latter can then, for example the element of the handle holder. The lateral opening in the cap is dimensioned so that the grip section adjacent to the ball head or Handle bracket section can not be passed but the ball head. Due to the slit-shaped design of the The opening in the cap can be the one adjacent to the ball head Handle section through the slot in one Plane pivoted perpendicular to the cutting plane. The Slit can protrude from a side edge of the cap extend the side wall. Instead of one Slot can also have an opening that does not lead to the edge be formed in the side wall. The related particularly preferred embodiment consists of a Sealing knife with a first handle mounting element, the protrudes from the cutting body and a bearing section has, with a second handle support member, the has a spherical head on the front Storage section is stored, and with a cap that the enclosing the first and the second handle mounting element holds together and a side slot for pivoting Perform one adjacent to the ball head Handle bracket portion of the second handle bracket member having.

Claims (14)

Sealing knife with a cutting edge (3) on a cutting body (2) for lifting off a seal (13) from a base (11) spanning a cutting plane and a handle (1) for guiding the cutting body (2) with the cutting edge (3) over the surface, the cutting edge (3) being formed on at least one peripheral side of the cutting body (2) lying in the cutting plane, characterized in that the handle (1) protrudes from one side of the cutting body (2) in the lateral direction to the cutting plane (11) and the cutting body (2) is designed as a flat cutting plate. A sealing knife according to claim 1, wherein
the cutting body (2) with bevelled cutting edge (3) is designed as a cutting blade. Sealing knife according to claim 1 or 2 with
Cutting edges (3) on two opposite sides of the cutting body (2). Sealing knife according to any preceding claim Cutting edges (3) on at least two directly to one another adjacent sides of the cutting body (2) for releasing the Gasket in the corner area of three colliding Walls. A sealing knife according to any preceding claim, in which the handle (1) is firmly attached to the cutting body (2). Sealing knife, in particular according to one of claims 1-4, with a cutting edge (3) on a cutting body (2) for lifting off a seal (13) from a base (11) spanning a cutting plane and a handle (1) for guiding the cutting body (2) with the cutting edge (3) over the surface, the cutting edge (3) being formed on at least one peripheral side of the cutting body (2) lying in the cutting plane, marked by
a handle holder (7, 11, 74, 75) for pivotably fastening the handle (1) to the cutting body (2). A sealing knife according to claim 6, in which
the handle holder (7, 11, 74, 75) is designed for pivotably fastening the handle (1) in a plane perpendicular to the cutting direction (S). A sealing knife according to claim 6, in which
the handle holder (7) is designed for pivotably fastening the handle (1) in a plane which is spanned by the cutting direction (S) and perpendicular to the cutting plane (11). A sealing knife according to claim 6, in which
the handle holder is designed for pivotably attaching the handle (1) to the cutting body (2) in at least two planes perpendicular to the cutting plane spanned by the base (11), in particular in the cutting direction (S) and laterally to the cutting direction (S). Sealing knife according to one of claims 6-9, with a first handle holding element which projects from the cutting body (2) and has a bearing section, a second handle holding element, which has a ball head on the end face, which is mounted on the bearing section, and a cap, which holds the first and the second handle holder element together and has a lateral opening for the pivotable passage of a handle holder section of the second handle holder element adjacent to the ball head. Sealing knife according to any preceding claim a handle bracket (7, 71 - 73) for releasably attaching the Handle (1) on the cutting body (2). A sealing knife according to any preceding claim, in which the handle (1) for a replacement body (12) Includes replacement cutting bodies (2 *). A sealing knife according to any preceding claim, in which the cutting body (2) and / or the handle (1) made of ceramic and / or metal, in particular manufactured by powder metallurgy, is trained. A sealing knife according to any preceding claim, in which between a rigid portion of the handle (1) and the Cutting body (2) an elastic section is arranged or at least a portion of the handle (1) elastic is designed to enable pivoting of the Handle in a plane perpendicular to the cutting direction (S).

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