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WO1997019791A1 - Cutting tool for gypsum board - Google Patents

Cutting tool for gypsum board Download PDF

Info

Publication number
WO1997019791A1
WO1997019791A1 PCT/FI1996/000637 FI9600637W WO9719791A1 WO 1997019791 A1 WO1997019791 A1 WO 1997019791A1 FI 9600637 W FI9600637 W FI 9600637W WO 9719791 A1 WO9719791 A1 WO 9719791A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame tube
cutting tool
slide part
gypsum board
cutting
Prior art date
Application number
PCT/FI1996/000637
Other languages
French (fr)
Inventor
Raine Sakari Nieminen
Original Assignee
Raine Sakari Nieminen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raine Sakari Nieminen filed Critical Raine Sakari Nieminen
Priority to DE29681047U priority Critical patent/DE29681047U1/en
Publication of WO1997019791A1 publication Critical patent/WO1997019791A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
    • B28D1/228—Hand-held or hand-operated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B29/00—Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
    • B26B29/06—Arrangements for guiding hand cutting tools
    • 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
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/0006—Means for guiding the cutter

Definitions

  • the present invention relates to a cutting tool according to the preamble of the claim.
  • the cutting of a gypsum board is normally carried out in a horizontal plane on a bench intended for the purpose. First, measurements are marked out at both ends of the board at points of the desired width, thereafter a straight-edge, i.e. a maxi ⁇ mally straight plank or a metal ruler, is placed from one mark to the other.
  • the gypsum board liner is scored along the side of the straight-edge by using a craft knife, and the gypsum is impact-fractured, the board is folded to rest on the liner of the other side, and a cut is made at the fold. A cut effected in this manner may fracture very obliquely, and the finishing work will take relatively much time.
  • the object of the present invention is to eliminate these dis ⁇ advantages, and to speed up the performance of the work and make it substantially more accurate.
  • this object can be achieved, since in the present cutter the measuring, cutting and guiding are in one and the same device.
  • the frame of the cutter is made up of a steel tube 1, in the example case the inner dimensions of the steel tube are 18x22 mm.
  • the wall thickness is approx. 1.5-2 mm and the length approx. 170 mm.
  • the wall at the same time serves as a handle.
  • At an angle of 90 degrees to the frame tube there is a U- profile 2, attached by welding and having an inner dimension of 15-20 mm, and its wall thickness is approx. 2 mm.
  • the length of the profile is 200-250 mm, and it serves as the guide part in the cutter.
  • the blade holder is a 20-25 mm wide and 80-90 mm long U- profile, at one end of which the blade is secured by a wing screw 8. At the other end of the blade holder there is attached a plastic knob 7, which is tightened from below by a screw 9 and by means of which it is easy to guide the blade.
  • the slide part may be up to 1200-1250 mm long, but the most effective and most accurate work performance is achieved when it is approx. 750-800 mm long, since in that case the cutter can already be used for halving a normal 1200 mm gypsum board. For this reason the maximum required cutting width of the cut ⁇ ter is 600 mm.
  • At one end of the slide part there is secured, by means of a 10 M 5x20 screw and a nut, an approx. 5 mm thick and 20x20 mm wide rubber piece 11. This serves as a stopper, preventing the slide part from becoming detached from the frame tube. When necessary, the stopper is detached and the slide part is removed from the frame tube in order to remove any impurities and gypsum dust from the inside of the frame tube, for example by using compressed air.
  • a cutting width of the device can be seen directly from the scale on the slide part, the forward end 12 of the frame tube serving as the scale-reading point.
  • the cutting width is locked by means of a locking handle 5 attached to the other end of the frame tube by means of a 12 M 8x35 screw and a nut; the handle presses the slide part against the screw.
  • the lever arm of the locking handle will be relatively long, in which case very secure locking is achieved with even a rather small compressive force.
  • cutting can be performed in a horizontal plane on a bench, as with devices used thus far. It is also possible that a stack of boards is resting, for example, against a wall, which is a rather common method in smaller construction projects and renovation projects.
  • the above-mentioned oblique fracturing of the gypsum can be eliminated by means of the present cutter by cutting the liners on both sides of the board, in which case the cut edge will be in a horizontal plane and the finishing work by means of a plane intended for the purpose will be easy and rapid.
  • a door opening may be within part of a board, in which case one part of the board may be of full width and another part must be made narrower. Even in this case the cutting can be done successfully without other tools, owing to this cutting of the liner on both sides.
  • the most efficient operating range of the cutter is approx. from 20 mm to 600 mm, but it can be adjusted steplessly up to 1200 mm. This, however, requires the slide part to be replaced with a longer one, and slide parts can be manufactured as re ⁇ placement parts.
  • the cutter is very easy to use and light to handle. The dimensional accuracy is high, and the directional stability of the cutter is very good, since the U-profile will remain steadily against the edge of the board.
  • the locking handle may be attached also at its other end, in which case the locking of the slide part is carried out from above. It is also possible to manufacture the entire blade holder and even the slide part of plastic or nylon.
  • the steel part may also be made of aluminium.
  • the cutter can also be manufactured as its mirror image for left-handed persons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Devices For Warming Or Keeping Food Or Tableware Hot (AREA)
  • Dowels (AREA)

Abstract

The invention relates to a cutting tool for gypsum board. The cutting tool has a frame tube (1) to which there is attached a guide part (2). Through the frame tube there runs a slide part (3) equipped with a measuring scale of 0-600 mm (15) and a measuring scale of 1200-600 mm (16). The frame tube (1) has a locking handle (5) for locking the slide part to the frame tube, and that at the other end of the slide part there is a blade holder (4) equipped with a blade (6).

Description

Cutting tool for gypsum board
The present invention relates to a cutting tool according to the preamble of the claim.
The methods and cutting tools known thus far have deficiencies in accuracy, and the performing of the work takes a great deal of time.
The cutting of a gypsum board is normally carried out in a horizontal plane on a bench intended for the purpose. First, measurements are marked out at both ends of the board at points of the desired width, thereafter a straight-edge, i.e. a maxi¬ mally straight plank or a metal ruler, is placed from one mark to the other. The gypsum board liner is scored along the side of the straight-edge by using a craft knife, and the gypsum is impact-fractured, the board is folded to rest on the liner of the other side, and a cut is made at the fold. A cut effected in this manner may fracture very obliquely, and the finishing work will take relatively much time. In the case of long cuts, it is very difficult to keep the straight-edge correctly oriented, as in cutting a board in half, since a gypsum board is normally 1200 mm wide. Halving such a board is rather diffi¬ cult, since the human reach sets limitations. There are also so-called disc cutters, in which discs rotate on both sides of the board. When the discs become blunt and when the width being cut is great, such a cutter no longer works, since the discs will not penetrate the liner.
The object of the present invention is to eliminate these dis¬ advantages, and to speed up the performance of the work and make it substantially more accurate.
According to the invention, this object can be achieved, since in the present cutter the measuring, cutting and guiding are in one and the same device.
To put it more precisely, a cutter according to the invention is characterized in what is stated in the characterizing clause of the claim.
The invention is described below in greater detail, with refer¬ ence to the accompanying drawing, in which Figure 1 depicts the cutting tool as seen from above, and Figure 2 depicts the cutting tool as seen in the cutting direction.
The frame of the cutter is made up of a steel tube 1, in the example case the inner dimensions of the steel tube are 18x22 mm. The wall thickness is approx. 1.5-2 mm and the length approx. 170 mm. The wall at the same time serves as a handle. At an angle of 90 degrees to the frame tube there is a U- profile 2, attached by welding and having an inner dimension of 15-20 mm, and its wall thickness is approx. 2 mm. The length of the profile is 200-250 mm, and it serves as the guide part in the cutter.
A slide part 3, running through the frame tube and being equipped with one measuring scale of 0-600 mm and another meas¬ uring scale of 1200-600 mm, has, attached by welding or screw¬ ing to its 9x21 mm steel rod, a blade holder 4.
The blade holder is a 20-25 mm wide and 80-90 mm long U- profile, at one end of which the blade is secured by a wing screw 8. At the other end of the blade holder there is attached a plastic knob 7, which is tightened from below by a screw 9 and by means of which it is easy to guide the blade.
The slide part may be up to 1200-1250 mm long, but the most effective and most accurate work performance is achieved when it is approx. 750-800 mm long, since in that case the cutter can already be used for halving a normal 1200 mm gypsum board. For this reason the maximum required cutting width of the cut¬ ter is 600 mm. At one end of the slide part there is secured, by means of a 10 M 5x20 screw and a nut, an approx. 5 mm thick and 20x20 mm wide rubber piece 11. This serves as a stopper, preventing the slide part from becoming detached from the frame tube. When necessary, the stopper is detached and the slide part is removed from the frame tube in order to remove any impurities and gypsum dust from the inside of the frame tube, for example by using compressed air.
A cutting width of the device can be seen directly from the scale on the slide part, the forward end 12 of the frame tube serving as the scale-reading point. The cutting width is locked by means of a locking handle 5 attached to the other end of the frame tube by means of a 12 M 8x35 screw and a nut; the handle presses the slide part against the screw. The lever arm of the locking handle will be relatively long, in which case very secure locking is achieved with even a rather small compressive force. By using this cutter, cutting can be performed in a horizontal plane on a bench, as with devices used thus far. It is also possible that a stack of boards is resting, for example, against a wall, which is a rather common method in smaller construction projects and renovation projects. There are also situations, such as narrow corridors, into which a bench will simply not fit, and in such a case the boards must be cut while resting against a wall. In such a case it is al¬ most impossible for one person to cut a 3000 mm long gypsum board by the prior-known straight-edge method. By using the cutter according to the present invention, cutting is very easy.
The above-mentioned oblique fracturing of the gypsum can be eliminated by means of the present cutter by cutting the liners on both sides of the board, in which case the cut edge will be in a horizontal plane and the finishing work by means of a plane intended for the purpose will be easy and rapid. When partition walls are being clad with boards, a door opening may be within part of a board, in which case one part of the board may be of full width and another part must be made narrower. Even in this case the cutting can be done successfully without other tools, owing to this cutting of the liner on both sides.
In methods known thus far, cuts transverse to the scored cut have been carried out using a saw or the like.
The most efficient operating range of the cutter is approx. from 20 mm to 600 mm, but it can be adjusted steplessly up to 1200 mm. This, however, requires the slide part to be replaced with a longer one, and slide parts can be manufactured as re¬ placement parts. The cutter is very easy to use and light to handle. The dimensional accuracy is high, and the directional stability of the cutter is very good, since the U-profile will remain steadily against the edge of the board.
Replacement of the cutter blade is easy and rapid, requiring the loosening and tightening of only one screw. It is possible to use in the cutter so-called industrial blades, having two- sided blades, in which case four different cutting edges can be obtained by turning the blade.
Options also deviating from that described above are conceiv¬ able within the scope of the invention. Thus, the locking handle may be attached also at its other end, in which case the locking of the slide part is carried out from above. It is also possible to manufacture the entire blade holder and even the slide part of plastic or nylon. The steel part may also be made of aluminium. The cutter can also be manufactured as its mirror image for left-handed persons.

Claims

Claim
A cutting tool for gypsum board, characterized in that it has a frame tube (1) to which there is attached a guide part (2) and through which frame tube there runs a slide part (3) equipped with a measuring scale of 0-600 mm (15) and a measuring scale of 1200-600 mm (16), that the frame tube (1) has a locking handle (5) for locking the slide part to the frame tube, and that at the other end of the slide part there is a blade holder (4) equipped with a blade (6) .
PCT/FI1996/000637 1995-11-27 1996-11-26 Cutting tool for gypsum board WO1997019791A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29681047U DE29681047U1 (en) 1995-11-27 1996-11-26 Cutting tool for a plaster board

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI950494U FI2266U1 (en) 1995-11-27 1995-11-27 Plasterboard cutting tool
FIU950494 1995-11-27

Publications (1)

Publication Number Publication Date
WO1997019791A1 true WO1997019791A1 (en) 1997-06-05

Family

ID=8542744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1996/000637 WO1997019791A1 (en) 1995-11-27 1996-11-26 Cutting tool for gypsum board

Country Status (3)

Country Link
DE (1) DE29681047U1 (en)
FI (1) FI2266U1 (en)
WO (1) WO1997019791A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827703A1 (en) * 1998-06-22 1999-12-23 Erich Decker Tool for cutting plasterboard materials
US20160178338A1 (en) * 2014-12-18 2016-06-23 Victor S. Webb Retractable measuring and cutting device
DE202018000810U1 (en) 2018-02-07 2018-03-29 Mathias Voigt Cutting device for plasterboard

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850730C1 (en) * 1998-11-04 2000-03-16 Fernholz Gmbh & Co Kg W & H Knife for cutting off lid of plastics beaker containing milk, soft cheese, yoghurt, cocoa, or fruit preparations, incorporates grip and knife blade for opening lid
DE19858944C1 (en) * 1998-12-09 2000-03-16 Sandor Papp Straight and circular cutter has ruler with sliding clamp for guiding knife or writing implement
DE102022117373A1 (en) * 2022-07-12 2024-01-18 FQ One GmbH Device for cutting panels

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US619397A (en) * 1899-02-14 Cutter
US2818644A (en) * 1955-04-15 1958-01-07 Claude T Crawford Wallboard measuring and cutting device
US4255856A (en) * 1979-11-13 1981-03-17 Malcolm Mackie Utility knife attachment
DE8133641U1 (en) * 1981-11-19 1982-05-19 Janser, Maximilian, 7031 Ehningen Cutting device for cutting strips from a floor covering
EP0365280A1 (en) * 1988-10-17 1990-04-25 Amblelord Ltd. A knife, blade and tape measure
US4949462A (en) * 1988-11-02 1990-08-21 Spencer Michael P Drywall cutting guide
US4979304A (en) * 1988-07-11 1990-12-25 Bradley J. Sprague Sheet material, cutter and guide
US5231764A (en) * 1992-06-03 1993-08-03 Kenneth Chang Cutter for a plasterboard sheet

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US619397A (en) * 1899-02-14 Cutter
US2818644A (en) * 1955-04-15 1958-01-07 Claude T Crawford Wallboard measuring and cutting device
US4255856A (en) * 1979-11-13 1981-03-17 Malcolm Mackie Utility knife attachment
DE8133641U1 (en) * 1981-11-19 1982-05-19 Janser, Maximilian, 7031 Ehningen Cutting device for cutting strips from a floor covering
US4979304A (en) * 1988-07-11 1990-12-25 Bradley J. Sprague Sheet material, cutter and guide
EP0365280A1 (en) * 1988-10-17 1990-04-25 Amblelord Ltd. A knife, blade and tape measure
US4949462A (en) * 1988-11-02 1990-08-21 Spencer Michael P Drywall cutting guide
US5231764A (en) * 1992-06-03 1993-08-03 Kenneth Chang Cutter for a plasterboard sheet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827703A1 (en) * 1998-06-22 1999-12-23 Erich Decker Tool for cutting plasterboard materials
US20160178338A1 (en) * 2014-12-18 2016-06-23 Victor S. Webb Retractable measuring and cutting device
US10036620B2 (en) * 2014-12-18 2018-07-31 Victor S. Webb Retractable measuring and cutting device
US10605580B2 (en) 2014-12-18 2020-03-31 Victor S. Webb Retractable measuring and cutting device
DE202018000810U1 (en) 2018-02-07 2018-03-29 Mathias Voigt Cutting device for plasterboard

Also Published As

Publication number Publication date
FIU950494U0 (en) 1995-11-27
DE29681047U1 (en) 1998-08-06
FI2266U1 (en) 1996-01-18

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