Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B5/00—Hand knives with one or more detachable blades
  • B26B5/005—Hand knives with one or more detachable blades specially adapted for cutting cardboard, or wall, floor or like covering materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B3/00—Hand knives with fixed blades
  • B26B3/08—Hand knives with fixed blades specially adapted for cutting cardboard, or wall, floor, or like covering materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
  • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
  • B26F1/38—Cutting-out; Stamping-out
  • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like

Definitions

• the invention relates to a cutting tool or a cutting device or a cutting tool designed for cutting out a section of a preferably air-impermeable floor covering resting on a substrate, e.g., a carpet, linoleum, vinyl, or the like.
• the cutting tool comprises a holder that can be placed on the floor covering and a blade holder arranged in this holder and movable relative to the holder via an actuating element, which blade holder is rotatable to perform a cutting movement.
• One or more blades are attached to the blade holder in such a way that they cut into the floor covering when the cutting movement is performed in order to cut out the section from the floor covering.
• the invention is therefore based on the object or technical problem of providing a cutting tool which enables a particularly precise cutout in the sense of very good dimensional accuracy and positioning of the cutting tool on the floor covering to be cut.
• this task is therefore solved by the holder being designed to be particularly stable so that it forms the most even and smooth guide possible with its inner side for the knife holder.
• the knife holder is rectangular in shape, in particular constructed with a square geometry.
• the fixing means comprise two arms extending diametrically opposite each other from the central rotation axis of the holder. These arms can be connected to the holder either permanently or in a foldable manner, allowing them to be converted from a raised transport position to a lowered working position.
• the fixing means for securing the holder in the desired position can further comprise one or more suction cups.
• a suction cup is understood to be a device comprising sealing lips for firmly adhering the retaining ring to the floor covering. These sealing lips can thus be placed against the surface of the floor covering.
• a vacuum can be applied to the suction cup, preferably by means of a pump, which can also be integrated into the suction cup, e.g., a hand pump or a pump integrated into the device.
• the suction cups can be connected to the arms or connectable, i.e. attached to the holder via the arms at the side.
• the suction cups comprise a suction seal with a circumferential sealing lip that can be placed against the floor covering.
• a vacuum is applied to the top of the suction seal, causing the suction cup to adhere to the airtight floor covering.
• the suction devices are actuated by pumps, in particular by hand-operated pumps.
• the holder can be secured in the desired position by the user's weight.
• the arms which extend radially from the sides of the holder without attached suction cups, can be used for this purpose. The user can stand on these arms, so that the cutting device is secured in the desired position by the user's own weight.
• the arms on which the user can stand to fix himself in the desired position are preferably designed as footrests or function as such.
• the knife holder is not mounted and guided on the inside of the holder, which is referred to here as horizontal mounting.
• the mounting and guidance can be provided via a holding section for holding the actuating element for the knife holder, which is designed as an actuating shaft.
• This actuating shaft can be rotated at an upper drive end by a user, preferably manually, but possibly also mechanically, and can be connected or connected to the knife holder in a rotationally fixed manner at a lower connecting end and extends vertically to the holder plane defined by the holder. Because this holding section is located in the usual Use on the floor extends vertically to the holder which then extends horizontally, this storage is referred to as vertical storage in contrast to the storage of the first embodiment.
• the holding section is attached to the top of the holder, preferably spanning a bridge, and comprises a shaft opening for supporting the actuating shaft centrally around the central longitudinal axis of the actuating shaft.
• This shaft opening preferably extends over a longer section to thus realize a particularly stable and precise longitudinal guidance of the actuating shaft in the shaft opening.
• the shaft opening can extend over a length of 800 to 1500 mm, particularly preferably 1150 mm.
• Bearings particularly rotating linear bearings or ball bushings, are preferably arranged in the holding section around the shaft opening. Arranging two bearings one above the other has proven particularly advantageous for stability.
• the holding section can be arranged in or received in two spaced-apart holding elements which extend between diametrically opposite ends of the holder and are fastened or fastenable thereto.
• the holding elements are designed as holding plates which extend like a bridge over the holder and, between them and extending coaxially with the shaft opening to the axis of rotation of the cutting device, accommodate the holding section, which is preferably designed as a holding bush, for supporting the actuating shaft.
• these arms which are then designed as suction cup arms, are preferably connected or connectable to the retaining ring at the height of the suction cups or at the upper end of the retaining ring, so that the suction cup can be connected to an air-impermeable floor covering or clamps for connection to an air-permeable floor covering with the arms, preferably in a detachable manner.
• the arms with the footrests are pivotally connected between holding plates, so that the arms lie between the holding plates or are enclosed by them in the raised transport position and rest on the ground in the lowered working position.
• a particularly compact and space-optimized design without arms provides for the fixation device to be integrated into the retaining ring.
• sealing lips can be provided directly on the underside of the retaining ring, e.g., embedded in it, which can be placed against the surface of the floor covering.
• a vacuum to the retaining ring, e.g., using a hand pump arranged in the retaining ring or a pneumatic vacuum element, the vacuum can then be applied to the suction cup in the retaining ring to fix it in the desired position.
• This design therefore eliminates the need for radially projecting arms with suction cups, making it particularly suitable for use in narrow or confined spaces.
• Different cutting circles with different radii can be realized by attaching knives to the knife holder, which can be spaced apart from a side wall of the knife holder via spacers in order to vary the radius as required.
• the device according to the invention for particularly precise cutting of a section in a floor covering thus also enables better drying of damp floors or a new drying process for drying damp Floors that have been or are exposed to water damage and require drying.
• drying is normally achieved using warm air by blowing or introducing the warm air into the lateral gap ("edge joint") between the screed lying on the floor and a wall enclosing the screed at the side.
• a core hole can now be drilled into the screed and the insulation down to the underlying screed.
• This core hole or hole can then be used to achieve particularly intensive drying of the floor, allowing drying to be completed much more quickly than using the edge joint alone.
• the drilled-out core can be reinserted, the missing screed filled, and the floor covering, e.g., linoleum or another floor covering, can be glued down.
• the invention enables and claims a novel drying method, which is characterized in that a core hole is drilled in the center of a floor and a drying device is connected to the hole thus created in the screed. The floor is thus dried via this hole with and without the edge joint.
• a joint of 2 - 5 mm wide can be cut using a double blade, thus creating a circular cutout between the cutout and the floor covering, which is filled with filler when reinserted in order to fix the cutout tightly against the surrounding floor covering and connect it to it.
• the cutout as a ring element, which means that at least one first knife on the knife holder is arranged radially further inwards towards the axis of rotation than at least one second knife, which is then arranged radially further outwards compared to the - at least one - first knife.
• the blades of the blade holder can be spring-loaded or spring-loaded.
• the particularly stable and dimensionally accurate embodiment of the cutting tool according to the invention comprises that all essential components, such as the retaining ring, the blade holder, and the arms for the suction cups ("suction cup arms"), are constructed from metal parts, in particular with a material thickness of 5 mm or more.
• An alternative embodiment provides for the design to be made from a fiber-reinforced plastic.
• connection means both a direct and an indirect connection, a direct or indirect connection and a direct or indirect integration.
• the indefinite article and the definite article do not refer to a single component, but are to be understood as “at least one.”
• the terminology includes the aforementioned words, variations thereof, and similar meanings.
• the terms "about,””substantially,” and similar terms in connection with the dimensions and a characteristic of a component of the invention do not imply the described dimension and characteristic as a strict limit or Describe parameters and do not exclude minor modifications thereof that are functionally similar.
• descriptions containing numerical parameters also include modifications of these parameters according to the mathematical and manufacturing principles of the prior art, e.g., rounding, deviations, and other systematic errors, manufacturing tolerances, etc.
• identical or similar elements are provided with identical reference symbols where appropriate.
• Reference symbol lines are lines that connect the reference symbol to the part in question.
• Figure 1 shows an isometric top view of the cutting tool. This essentially comprises the centrally arranged retaining ring 2 and suction cups arranged laterally therefrom, namely a first suction cup 4 and a second suction cup 6.
• the knife holder 10 like the retaining ring 2, is made of metal, in particular steel, and has a square geometry.
• Ball bearings 12, 12', 12", 12′′′; 13, 13', 13", 13"' are arranged at the corners of the knife holder 10, specifically on the top side of the knife holder 10 and on its bottom side, so that a total of eight ball bearings 12, 12', 12", 12′′′; 13, 13', 13", 13′′′ hold the knife holder 10 within the retaining ring 2 and thus realize particularly precise and dimensionally accurate guidance.
• a cross member 14 Extending transversely over the upper side of the retaining ring 2, a cross member 14 is arranged, which is detachably fastened to the upper side of the retaining ring 2 by means of two screws 16, 16' and which has a rotation axis 18 in the middle, which extends around the central rotation axis in the center of the retaining ring 2 and is rotationally fixed to the Knife holder 10 is connected.
• the knife holder 2 is then actuated via the rod 8, which is displaceably arranged in a transverse hole within the rotation axis 18.
• the knife holder can also be accommodated in the holder ring in a height-adjustable manner, so that the knife holder can be accommodated in the holder ring 2 for transport to protect the knives and to prevent injuries to the user, and can be lowered into the cross member 14 and placed on the ground for the cutting process.
• Two suction arms 20, 20' can be provided, projecting diametrically laterally on the upper side of the retaining ring 2, to whose distal ends, i.e. directed away from the central axis of rotation, the suction cups 4, 6, which are otherwise known in their construction, are fastened, which serve as fixing means in this embodiment.
• the fixed arrangement of the suction arms on the retaining ring increases the dimensional accuracy and stability of the cutting device.
• the suction arms 20, 20' can also be designed to be insertable into the retaining ring 2 and not, as in the present embodiment, be designed in one piece with the retaining ring 2.
• the suction cups 4, 6 are designed as manually operated suction cups, which therefore each comprise a hand pump on the top side that can be operated via a button on the side, so that a negative pressure can be built up on the suction cup surface with the circumferential sealing rubber or on the contact surface of the suction cup on the lower contact surface of the suction cup, with which it can be fixed, for example, to a linoleum floor.
• the suction arms 20, 20' can also be designed to be insertable into the retaining ring 2 and not, as in the present embodiment, be designed in one piece with the retaining ring 2.
• suction arms 20, 20" there are trough-shaped receptacles into which the suction cups 4, 6 can be inserted and releasably fixed by means of a split pin.
• these are commercially available suction cups 4, 6, which are used, for example, for carrying glass panes.
• bearings 12, 12', 12", 12"'; 13, 13', 13", 13′′′ are arranged at all corners of the knife holder 10, namely on the top and bottom of the knife holder 10, i.e., in two planes, in order to effectively prevent the knife holder from tilting in the retaining ring 2 and thus to achieve particularly precise running and thus cutting.
• These bearings which can be designed as roller bearings or plain bearings and are arranged on two vertical planes between the knife holder 10 and the retaining ring 2, ensure particularly good tilt stability of the movable knife holder 10 in relation to the stationary retaining ring 2.
• the suction cups 4, 6 are designed as manually operated suction cups, which therefore each comprise a hand pump on the top side that can be operated via a button on the side, so that a negative pressure can be built up on the suction cup surface with the circumferential sealing rubber or on the contact surface of the suction cup on the lower contact surface of the suction cup, with which it can be fixed, for example, to a linoleum floor.
• trough-shaped receptacles can preferably be formed, into which the suction cups 4, 6 can be inserted and releasably fixed by means of a splint.
• these are commercially available suction cups 4, 6, which are used, for example, for carrying glass panes.
• bearings 12, 12', 12", 12"; 13, 13', 13", 13′′′ are arranged at all corners of the knife holder 10, namely on the top and bottom of the knife holder 10, in order to effectively prevent the knife holder from tilting in the holding ring 2 and thus to achieve particularly precise running and thus cutting.
• bearings arranged on two vertical planes between the knife holder 10 and the holding ring 2 are particularly well suited to Figure 4 to see, which shows an enlarged detailed view of the upper section of the knife holder 10 and the retaining ring 2.
• the view of the cutting device from below in Figure 3 shows the knives 22, 22', 22", 22′′′ attached to the side of the knife holder 10, which in this case are screwed to each side of the knife holder 10 at an angle of inclination of 30 to 45 degrees.
• spacer elements of different widths can be arranged between the knife holder 10 and the knives 22, 22 ⁇ , 22", 22′′′, which are preferably releasably fixed to an external holder using screws.
• the suction arms 20, 20' can also be designed to be insertable into the retaining ring 2 and not, as in the present embodiment, to be designed as one piece with the retaining ring 2.
• Figure 5 shows an enlarged cross section through an alternatively designed retaining ring 2', which comprises sealing lips 26, 26' fastened to the underside as a fixing means, inserted here into corresponding grooves and extending all the way around, with which the retaining ring 2' can be placed on a base and, by applying a negative pressure, can be applied to the annular space formed between the retaining ring 2' and the sealing lips 26, 26' and the base, in order to fix the retaining ring to the base in the desired position with precise positioning, in order to then carry out the cut.
• the cutting device again comprises an outer, stationary holding ring 36, which can be positioned or applied in the desired position on the floor covering, as well as the knife holder 34 in order to create the cutout in the floor covering.
• the knife holder 24 is cross-shaped with four arms.
• Four knives 34a, 34b, 34c, 34d are attached to the radially outer ends of the arms.
• the knives 34a, 34b, 34c, 34d can be configured by inserting spacers to either all make a cut within the same radius or with two radii, namely a smaller inner radius and a slightly larger outer radius, so that a circular ring can be cut out.
• the fixing means of the cutting device between the holding plates comprise pivotally hinged arms 40a, 40b, which can be transferred from a folded-up transport position (not shown), in which the arms 40a, 40b are arranged between the holding plates 38a, 38b, into a folded-down working position shown in the figures, in which the user can stand on these arms 40a, 40b on defined foot surfaces in order to position the cutting device in the desired position.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Knives (AREA)

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Citations (4)

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• 2024
  • 2024-01-11 DE DE102024100804.0A patent/DE102024100804A1/de active Pending
• 2025
  • 2025-01-13 EP EP25151582.1A patent/EP4585378A1/fr active Pending

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