CA2092700C - Method and device for attaching an object to a lightweight-construction wall - Google Patents
Method and device for attaching an object to a lightweight-construction wallInfo
- Publication number
- CA2092700C CA2092700C CA002092700A CA2092700A CA2092700C CA 2092700 C CA2092700 C CA 2092700C CA 002092700 A CA002092700 A CA 002092700A CA 2092700 A CA2092700 A CA 2092700A CA 2092700 C CA2092700 C CA 2092700C
- Authority
- CA
- Canada
- Prior art keywords
- insertion end
- insert
- threading
- self
- thread
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 238000010276 construction Methods 0.000 title abstract description 3
- 238000000034 method Methods 0.000 title description 2
- 238000003780 insertion Methods 0.000 claims abstract description 38
- 230000037431 insertion Effects 0.000 claims abstract description 38
- 238000010079 rubber tapping Methods 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 239000003562 lightweight material Substances 0.000 claims description 19
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004035 construction material Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000009850 completed effect Effects 0.000 description 2
- 244000228957 Ferula foetida Species 0.000 description 1
- 229910001229 Pot metal Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/002—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0031—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
- F16B37/122—Threaded inserts, e.g. "rampa bolts"
- F16B37/125—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded
- F16B37/127—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded and self-tapping
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Joining Of Building Structures In Genera (AREA)
- Load-Bearing And Curtain Walls (AREA)
- Finishing Walls (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Connection Of Plates (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Road Signs Or Road Markings (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Drilling Tools (AREA)
Abstract
In order to fix a screw-in insert with a self-tapping external thread into a lightweight-construction wall, the invention uses an insertion tool with a driver blade which is inserted into a cavity inside the screw-in insert, passing through the insert and emerging at the far end. The part of the driver blade which projects out at the far end of the insert forms a rough drilling, into the walls of which the thread of the insert cuts as the insert is pushed in by the tool.
Description
Device for Attaching an Object to a Lightweight Material Wall The invention concerns a mounting device for att~rhing an object to a lightweight material wall, with an insert which features a cavity for receiving a fastener, a tool blade which protrudes beyond the insertion end of the insert and has a drilling point for making in a lightweight material wall a cylindrical rough hole for receiving the insert, and a self-tapping external threading, and with a setting tool which in rota-tionally fixed fashion can be inserted in the cavity of the insert.
EP-Bl-165-674 describes such a mounting device with an insert featuring on its insertion end an opening and a tool blade protruding beyond the insertion end of the insert provided with a self-tapping external threading. The tool blade makes it possible to create in a lightweight construction material, during the setting, with the aid of the tool blade arranged on the front end of the insert sleeve a rough hole for the external threading of the insert. As a fastener used as a screw is twisted in upon setting the insert in a lightweight construction materi-al with a material thickness smaller than the length of the insert provided with the external threading, the front end of the screw forces the tool blade sideways out of the way. Therefore, the prior insert not requiring a rough hole can be used only if its length exceeds the thick-ness of the lightweight construction material. An application involving merely a blind hole, and not a through-hole, is not possible because of the necessary sideways escape movement of the tool blade.
Known from ~E-C-'2 419 111 is an insert for fastening an object in a lightweight material wall, the insert being closed on the front end and, upon creation of a cylindrical rough hole, turned into the latter with the aid of a power drill. As the insert is screwed into the cylindrical rough hole, its external threading cuts itself into the soft lightweight construction material, leavir.g the material between threads intact. This enables an anchoring free of expansion pressure, of a fastener which upon setting of the insert is screwed into its axial cavity for mounting an object.
US-A-3 289 290 describes a process and a device for setting in one oper-ation a mounting screw which requires a cylindrical rough hole to screw into. The mounting screw, for instance a wood screw, is for that purpose provided with a longitudin~l bore extending through it all the way, through which a usual drill bit chucked in a power drill is slipped in order to drill through the longitudinal bore of the screw a hole into the mounting substrate. Once the rough hole has been made, a screwdriver fitted in the chuck along with the drill bit engages the head of the screw, so that the latter can be screwed into the rough hole just com-pleted, without requiring the retraction of the drill bit in a first operation and the spin-in of the screw in a second operation.
EP-Bl-165-674 describes such a mounting device with an insert featuring on its insertion end an opening and a tool blade protruding beyond the insertion end of the insert provided with a self-tapping external threading. The tool blade makes it possible to create in a lightweight construction material, during the setting, with the aid of the tool blade arranged on the front end of the insert sleeve a rough hole for the external threading of the insert. As a fastener used as a screw is twisted in upon setting the insert in a lightweight construction materi-al with a material thickness smaller than the length of the insert provided with the external threading, the front end of the screw forces the tool blade sideways out of the way. Therefore, the prior insert not requiring a rough hole can be used only if its length exceeds the thick-ness of the lightweight construction material. An application involving merely a blind hole, and not a through-hole, is not possible because of the necessary sideways escape movement of the tool blade.
Known from ~E-C-'2 419 111 is an insert for fastening an object in a lightweight material wall, the insert being closed on the front end and, upon creation of a cylindrical rough hole, turned into the latter with the aid of a power drill. As the insert is screwed into the cylindrical rough hole, its external threading cuts itself into the soft lightweight construction material, leavir.g the material between threads intact. This enables an anchoring free of expansion pressure, of a fastener which upon setting of the insert is screwed into its axial cavity for mounting an object.
US-A-3 289 290 describes a process and a device for setting in one oper-ation a mounting screw which requires a cylindrical rough hole to screw into. The mounting screw, for instance a wood screw, is for that purpose provided with a longitudin~l bore extending through it all the way, through which a usual drill bit chucked in a power drill is slipped in order to drill through the longitudinal bore of the screw a hole into the mounting substrate. Once the rough hole has been made, a screwdriver fitted in the chuck along with the drill bit engages the head of the screw, so that the latter can be screwed into the rough hole just com-pleted, without requiring the retraction of the drill bit in a first operation and the spin-in of the screw in a second operation.
Basing on this prior art, the problem underlying the invention is to provide a device of the initially discussed type which in a material-saving way allows a quick and simple assembly in lightweight construction materials of any thickness without preparing a rough hole.
This problem is inventionally solvèd in that the tool blade on the setting tool is fashioned as a flat slat blade and can be advanced with its drilling point, through the cavity of the insert, beyond its insertion end.
Since the setting tool protrudes with its blade beyond the insertion end of the insert, it is possible, for one, to produce with the tool blade, in a single operation, first a rough hole as the setting tool rotates, which rough hole is in the course of its creation engaged by the insertion end of the insert, which due to the rotary movement cuts a threading with its external threading. Upon retraction of the setting tool, for another, a fastener - specifically a screw - can be turned into the vacated cavity of the insert, without its advance being affected by a tool blade provided on the insert.
In a broad aspect, the present invention relates to mounting device for fastening an object on a lightweight material wall, with an insert which features a cavity for receiving a fastener, a tool blade which protrudes beyond the insertion end of the insert and has a drilling point for making in a lightweight material wall a cylindrical rough hole for receiving the insert, and a self-tapping external threading, and with a setting tool which in rotationally fixed fashion can be inserted in the cavity of the insert, characterized in that the tool blade is fashioned on the setting tool as a flat slat and can be advanced with its drilling point, through the cavity of the insert, beyond the insertion end of the insert.
~*
~ , - 3a - 2 Og2 700 Suitable developments and designs of the invention derive from the subclaims and the following description of an embodiment of the invention with the aid of the drawing, which shows in Fig. 1, a perspective view of a setting tool according to the invention;
.~
This problem is inventionally solvèd in that the tool blade on the setting tool is fashioned as a flat slat blade and can be advanced with its drilling point, through the cavity of the insert, beyond its insertion end.
Since the setting tool protrudes with its blade beyond the insertion end of the insert, it is possible, for one, to produce with the tool blade, in a single operation, first a rough hole as the setting tool rotates, which rough hole is in the course of its creation engaged by the insertion end of the insert, which due to the rotary movement cuts a threading with its external threading. Upon retraction of the setting tool, for another, a fastener - specifically a screw - can be turned into the vacated cavity of the insert, without its advance being affected by a tool blade provided on the insert.
In a broad aspect, the present invention relates to mounting device for fastening an object on a lightweight material wall, with an insert which features a cavity for receiving a fastener, a tool blade which protrudes beyond the insertion end of the insert and has a drilling point for making in a lightweight material wall a cylindrical rough hole for receiving the insert, and a self-tapping external threading, and with a setting tool which in rotationally fixed fashion can be inserted in the cavity of the insert, characterized in that the tool blade is fashioned on the setting tool as a flat slat and can be advanced with its drilling point, through the cavity of the insert, beyond the insertion end of the insert.
~*
~ , - 3a - 2 Og2 700 Suitable developments and designs of the invention derive from the subclaims and the following description of an embodiment of the invention with the aid of the drawing, which shows in Fig. 1, a perspective view of a setting tool according to the invention;
.~
Fig. 2, a side elevation of the insert according to the invention;
Fig. 3, a view of the rear end of the insert illustrated in Fig. 2, left;
Fig. 4, a vi~ew of the front end of the insert illustrated in Fig. 2, right, viewed in axial direction;
Fig. 5, the insert with the inserted setting tool, the toolholder of which is chucked in a power drill and whose tool blade pro-duces during the setting operation a rough hole in a light-weight material wall;
Fig. 6, a sectional view along line VI-VI in Fig. 5;
Fig. 7, the insert and setting tool after setting in the lightweight material wall, partly cut away, as a side elevation;
Fig. 8, the insert set in the lightweight material wall after a mounting screw for attachment of an object to the light-weight material wall has been turned in; and Fig. 9, a cross section of the insert illustrated in Fig. 8,'showing the position of the mounting screw in the cross-slotted cavity of the insert.
Shown perspectively in Fig. 1 is a setting tool 1 which with its-hexago-nal toolholder 2 can be fitted in the chuck of a power drill. Molded to the hexagonal toolholder 2 is an adapter 3 from which protrudes a tool blade 4. The adapter 3 is tapered so as to provide a better grip in its assembly. ~hile the toolholder 2 and the adapter 3 consist preferably of plastic, the tool blade 4 consists of a metal of sufficient hardness and wear resistance.
The tool blade 4 is fashioned as a relatively flat slat of constant thickness and constant width and extends into a point S of triangular design with a rounded point, its material thickness ~irini ~hing forward-ly, so that the tool blade 4 with its point 5 assumes a dagger type appearance.
The rounded point 5 also has a shape enabling the driving or retraction of cross-slotted screws with the setting tool 1. This makes it possible to use the setting tool 1 also as an emergency screwdriver.
The tool blade 4 has a material thickness of, e.g., 1.3 mm and a length of about 40 mm. The adapter 3 may have a length of 10 mm, the toolholder 2 one of 15 mm.
The setting tool 1 serves the setting of an insert 7 illustrated in Fig.
2 and consisting of plastic or die-cast zinc. The insert 7 features a cylindrical core section 8 through which extends a slot 9 visible in Fig. 2. The slotted cylindrical core section 8 extends into a conic section 10 extending on the rear end of the insert 7 into a collar 11.
The cylindrical core section 8 and the conic section 10 are surrounded by a coarse-pitch threading 12 fashioned as a self-tapping external threading, so that the insert 7, as it is screwed into a bore in a lightweight construction material, cuts a threading in which the insert 7 finds a hold without expansion pressure.
The self-tapping threading 12 ends at the point marked 13, before the collar 11 on the rear end of the insert 7, and dwindles on the front, or insertion, end 14 of the insert 7 with an ever-diminishing thread height, as can b'e seen best from Fig. 4.
Fig. 4 also shows that in the spire of the threading 12 adjacent to the insertion end there are several recesses 15 provided, forming several cutting edges 6 which facilitate the tapping of the threading 12 in a lightweight construction material, specifically a plasterboard panel.
The conic area lO solidifies the plasterboard panel at the rear end of the insert 7, enabling thereby higher retention forces of the mounting device.
Fig. 3 shows a view of the rear end of the insert 7 and the collar 11, the latter being ring-shaped in plan view. Visible both in Fig. 3 and Fig. 4 is a cavity 16 cross-slotted in cross section, which in axial direction extends through the insert 7. The cross-shaped cavity serves after the setting of the insert 7 to receive a fastener, particularly a screw 27 (Fig. 8), which with is threading is allowed to tap into the plastic surrounding the cavity 16.
The cavity 16 consists of a wider flat slot 17, which in Fig. 2, 3 and 4 extends nearly horizontally, and of a narrower flat slot 18, which in Fig. 3 and 4 extends almost vertically. The wide flat slot 17 and the narrow flat slot 18 traverse the insert 7 from the rear end on the collar 11 to the insertion end 14.
The wider flat slot 17 has a width corresponding to the core dia~eter of the threading 12, respectively to the outside diameter of the cylindri-cal core section 8. Therefore, the wide flat slot 17 in the cylindrical core section.8 forms the already mentioned slot 9 forming a first shank 19 and a second shank 20, which by the turns of the surrounding thread-ing 12 are mechanically so stabilized that the slot 9 will not result in any appreciable weakening of the insert 7 in its front area.
The width of the tool blade 7 corresponds to the width of the wider flat slot 17, and-thus to the diameter of the cylindrical core section 8.
This can be seen especially distinctly in Fig. 5.
Fig. 5 shows a lightweight material wall 22, specifically a plasterboard panel, in which the tool blade 4 has produced a rough hole 21 which is cylindrical nearly all the way, after the setting tool 1 has been slipped - starting at the collar 11 - into the flat slot 17 of the in-sert until the adapter 3 bears on the collar 11 and after the setting tool 1 - with its toolholder 2 fitted in the chuck 23 of a power drill -has been rotated.
During the rotations generated with the aid of the power drill, the point 5 of the setting tool 1 first digs through the upper layer, spe-cifically a cardboard layer, of the lightweight material panel 22. Next, it traverses the lightweight construction material 22 and emerges again, as can be seen from Fig. 5, on the opposite side of the lightweight material panel 22.
Shortly thereafter, the insertion end 14 of the cylindrical section 8, its diameter corresponding to the width of the tool blade 4, proceeds into the just prepared rough hole 21 in the lightweight construction material 22 as s`oon as the first turn of the threading 12 engages with its cutting edges 6 the material of the lightweight panel 22, so that the insert 7 produces a threaded hole in it.
Fig. 6 depicts in a section along line VI-VI of Fig. 5 the geometric ratios and shows particularly how the width of the tool blade 4 entirely occupies the wider flat slot 17 and reaches up to the surface of the cylindrical core section 8, while the threading 12 produces a threading which reaches up to the dotted circle 24.
MAk;ng the threading in the light weight material panel 22 is completed after a few revolutions, and the insert 7 is screwed in as shown in Fig. 7. Instead of a power drill, also a cross-tipped screwdriver can be used to carry out the setting operation, for which reason the toolholder 2 features an axial depression for the positive insertion of a cross-tip screwdriver. A conic recess 25 in the tool blade 4 is so arranged in the axial depression that the rim of the recess and the point of the cross-tip screwdriver will engage well.
Fig. 7 shows particularly also the ratio of the length Ll of the insert 7 to the length L of the tool blade 4 protruding out of the adapter 3.
The length of the tool blade 4 outside the adapter is about 1.5 to 3 times as large as the length of the insert 7.
-Once the assembly state illustrated in Fig. 7 has been reached, the setting tool 1 can be retracted out of the insert 7 screwed into the lightweight material panel 22, in order to attach an object 26 with the aid of a screw 2;, which by means of the setting tool 1 can be twisted, through the object 26 to be fastened, into the cavity 16 of the insert 7. Once the screw 27 has been spun in, the fastening of the object 26 to the lightweight material panel 22 is obtained as illustrated in Fig. 8, without expansion pressure.
Fig. 9 shows a cross section through the lightweight material panel 22 and insert 7 along with screw 27, detailing how the threading 28 of the screw 27 is cut into the plastic material between the wide flat slot 17 and the narrow flat slot 18.
From the above description it follows that the insert 7 can be set in a single operation without requiring a separate operation for preparing the rough hole 21. The result is a simple and quick assembly at low material expense.
Fig. 3, a view of the rear end of the insert illustrated in Fig. 2, left;
Fig. 4, a vi~ew of the front end of the insert illustrated in Fig. 2, right, viewed in axial direction;
Fig. 5, the insert with the inserted setting tool, the toolholder of which is chucked in a power drill and whose tool blade pro-duces during the setting operation a rough hole in a light-weight material wall;
Fig. 6, a sectional view along line VI-VI in Fig. 5;
Fig. 7, the insert and setting tool after setting in the lightweight material wall, partly cut away, as a side elevation;
Fig. 8, the insert set in the lightweight material wall after a mounting screw for attachment of an object to the light-weight material wall has been turned in; and Fig. 9, a cross section of the insert illustrated in Fig. 8,'showing the position of the mounting screw in the cross-slotted cavity of the insert.
Shown perspectively in Fig. 1 is a setting tool 1 which with its-hexago-nal toolholder 2 can be fitted in the chuck of a power drill. Molded to the hexagonal toolholder 2 is an adapter 3 from which protrudes a tool blade 4. The adapter 3 is tapered so as to provide a better grip in its assembly. ~hile the toolholder 2 and the adapter 3 consist preferably of plastic, the tool blade 4 consists of a metal of sufficient hardness and wear resistance.
The tool blade 4 is fashioned as a relatively flat slat of constant thickness and constant width and extends into a point S of triangular design with a rounded point, its material thickness ~irini ~hing forward-ly, so that the tool blade 4 with its point 5 assumes a dagger type appearance.
The rounded point 5 also has a shape enabling the driving or retraction of cross-slotted screws with the setting tool 1. This makes it possible to use the setting tool 1 also as an emergency screwdriver.
The tool blade 4 has a material thickness of, e.g., 1.3 mm and a length of about 40 mm. The adapter 3 may have a length of 10 mm, the toolholder 2 one of 15 mm.
The setting tool 1 serves the setting of an insert 7 illustrated in Fig.
2 and consisting of plastic or die-cast zinc. The insert 7 features a cylindrical core section 8 through which extends a slot 9 visible in Fig. 2. The slotted cylindrical core section 8 extends into a conic section 10 extending on the rear end of the insert 7 into a collar 11.
The cylindrical core section 8 and the conic section 10 are surrounded by a coarse-pitch threading 12 fashioned as a self-tapping external threading, so that the insert 7, as it is screwed into a bore in a lightweight construction material, cuts a threading in which the insert 7 finds a hold without expansion pressure.
The self-tapping threading 12 ends at the point marked 13, before the collar 11 on the rear end of the insert 7, and dwindles on the front, or insertion, end 14 of the insert 7 with an ever-diminishing thread height, as can b'e seen best from Fig. 4.
Fig. 4 also shows that in the spire of the threading 12 adjacent to the insertion end there are several recesses 15 provided, forming several cutting edges 6 which facilitate the tapping of the threading 12 in a lightweight construction material, specifically a plasterboard panel.
The conic area lO solidifies the plasterboard panel at the rear end of the insert 7, enabling thereby higher retention forces of the mounting device.
Fig. 3 shows a view of the rear end of the insert 7 and the collar 11, the latter being ring-shaped in plan view. Visible both in Fig. 3 and Fig. 4 is a cavity 16 cross-slotted in cross section, which in axial direction extends through the insert 7. The cross-shaped cavity serves after the setting of the insert 7 to receive a fastener, particularly a screw 27 (Fig. 8), which with is threading is allowed to tap into the plastic surrounding the cavity 16.
The cavity 16 consists of a wider flat slot 17, which in Fig. 2, 3 and 4 extends nearly horizontally, and of a narrower flat slot 18, which in Fig. 3 and 4 extends almost vertically. The wide flat slot 17 and the narrow flat slot 18 traverse the insert 7 from the rear end on the collar 11 to the insertion end 14.
The wider flat slot 17 has a width corresponding to the core dia~eter of the threading 12, respectively to the outside diameter of the cylindri-cal core section 8. Therefore, the wide flat slot 17 in the cylindrical core section.8 forms the already mentioned slot 9 forming a first shank 19 and a second shank 20, which by the turns of the surrounding thread-ing 12 are mechanically so stabilized that the slot 9 will not result in any appreciable weakening of the insert 7 in its front area.
The width of the tool blade 7 corresponds to the width of the wider flat slot 17, and-thus to the diameter of the cylindrical core section 8.
This can be seen especially distinctly in Fig. 5.
Fig. 5 shows a lightweight material wall 22, specifically a plasterboard panel, in which the tool blade 4 has produced a rough hole 21 which is cylindrical nearly all the way, after the setting tool 1 has been slipped - starting at the collar 11 - into the flat slot 17 of the in-sert until the adapter 3 bears on the collar 11 and after the setting tool 1 - with its toolholder 2 fitted in the chuck 23 of a power drill -has been rotated.
During the rotations generated with the aid of the power drill, the point 5 of the setting tool 1 first digs through the upper layer, spe-cifically a cardboard layer, of the lightweight material panel 22. Next, it traverses the lightweight construction material 22 and emerges again, as can be seen from Fig. 5, on the opposite side of the lightweight material panel 22.
Shortly thereafter, the insertion end 14 of the cylindrical section 8, its diameter corresponding to the width of the tool blade 4, proceeds into the just prepared rough hole 21 in the lightweight construction material 22 as s`oon as the first turn of the threading 12 engages with its cutting edges 6 the material of the lightweight panel 22, so that the insert 7 produces a threaded hole in it.
Fig. 6 depicts in a section along line VI-VI of Fig. 5 the geometric ratios and shows particularly how the width of the tool blade 4 entirely occupies the wider flat slot 17 and reaches up to the surface of the cylindrical core section 8, while the threading 12 produces a threading which reaches up to the dotted circle 24.
MAk;ng the threading in the light weight material panel 22 is completed after a few revolutions, and the insert 7 is screwed in as shown in Fig. 7. Instead of a power drill, also a cross-tipped screwdriver can be used to carry out the setting operation, for which reason the toolholder 2 features an axial depression for the positive insertion of a cross-tip screwdriver. A conic recess 25 in the tool blade 4 is so arranged in the axial depression that the rim of the recess and the point of the cross-tip screwdriver will engage well.
Fig. 7 shows particularly also the ratio of the length Ll of the insert 7 to the length L of the tool blade 4 protruding out of the adapter 3.
The length of the tool blade 4 outside the adapter is about 1.5 to 3 times as large as the length of the insert 7.
-Once the assembly state illustrated in Fig. 7 has been reached, the setting tool 1 can be retracted out of the insert 7 screwed into the lightweight material panel 22, in order to attach an object 26 with the aid of a screw 2;, which by means of the setting tool 1 can be twisted, through the object 26 to be fastened, into the cavity 16 of the insert 7. Once the screw 27 has been spun in, the fastening of the object 26 to the lightweight material panel 22 is obtained as illustrated in Fig. 8, without expansion pressure.
Fig. 9 shows a cross section through the lightweight material panel 22 and insert 7 along with screw 27, detailing how the threading 28 of the screw 27 is cut into the plastic material between the wide flat slot 17 and the narrow flat slot 18.
From the above description it follows that the insert 7 can be set in a single operation without requiring a separate operation for preparing the rough hole 21. The result is a simple and quick assembly at low material expense.
Claims (28)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Mounting device for fastening an object on a lightweight material wall, with an insert which features a cavity for receiving a fastener, a tool blade which protrudes beyond the insertion end of the insert and has a drilling point for making in a lightweight material wall a cylindrical rough hole for receiving the insert, and a self-tapping external threading, and with a setting tool which in rotationally fixed fashion can be inserted in the cavity of the insert, characterized in that the tool blade (4) is fashioned on the setting tool (1) as a flat slat and can be advanced with its drilling point (5), through the cavity (16, 17) of the insert (7), beyond the insertion end (14) of the insert.
2. Device according to claim 1, characterized in that the tool blade (4) is fashioned in the way of a dagger with a symmetrically tapering drilling point (5).
3. Device according to claim 1, characterized in that the tool blade (4) has a rectangular cross section and a length equaling 1.5 to 3 times the length of the insert sleeve (7).
4. Device according to claim 1, characterized in that the tool blade (4) features on its end opposite the drilling point a toolholder (2).
5. Device according to claim 4, characterized in that the toolholder (2) features a hexagonal section and, on the end of the tool blade (4) opposite the drilling point (5), an adapter (3) as a stop for the rear end of the insert (7).
6. Device according to claim 5, characterized in that the hexagonal section is provided with an axial recess for positive insertion of a cross-tipped screwdriver.
7. Device according to claim 6, characterized in that the flat slat extends with its end opposite the drilling point (5) into the axial recess of the toolholder (2) and is provided with a conic recess (25) for positive engagement with the cross-tip screwdriver.
8. Device according to one of the claims 1 through 7, characterized in that the core diameter (8) of the external threading (12) equals at the insertion end (14) the width of the tool blade (4) which can be advanced through the cavity (16, 17).
9. Device according to claim 8, characterized in that the core diameter (8) of the external threading (12) increases on the end opposite the insertion end (14) to a diameter (10) which is larger than the width of the tool blade (4).
10. Device according to claim 1, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
11. Device according to claim 2, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
12. Device according to claim 3, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
13. Device according to claim 4, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
14. Device according to claim 5, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
15. Device according to claim 6, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
16. Device according to claim 7, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
17. Device according to claim 8, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
18. Device according to claim 9, characterized in that the thread height of the self-tapping external threading (12) increases starting at the insertion end (14) where the threading (12) ceases.
19. Device according to claim 10, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
20. Device according to claim 11, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
21. Device according to claim 12, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
22. Device according to claim 13, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
23. Device according to claim 14, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
24. Device according to claim 15, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
25. Device according to claim 16, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
26. Device according to claim 17, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
27. Device according to claim 18, characterized in that on the thread adjacent to the insertion end (14) there are tooth-shaped recesses (15) provided which form cutting edges (6).
28. Device according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, or 27, characterized in that the cavity (16) is cross-shaped in cross section, with the flat slot (17) wider in the radial direction having the height of the thickness of the tool blade (4) while having, under formation of a longitudinal slot (9), the width of the tool blade (4) and of the core diameter (8) of the insert (7) on the insertion end (14), while the narrower flat slot (18) extending rectangularly to the wider flat slot (17) along the longitudinal axis of the insert (7) has a width which everywhere is smaller than the core diameter (8) of the external threading (12) of the insert (7).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4039831A DE4039831C1 (en) | 1990-12-13 | 1990-12-13 | Object fastener to lightweight wall - has tool stem on setting tool as flat rod, whose drill tip is movable through insert inner cavity |
| DEP4039831.5 | 1990-12-13 | ||
| SG131094A SG131094G (en) | 1990-12-13 | 1994-09-09 | Device for attaching an object to a lightweight-construction wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2092700A1 CA2092700A1 (en) | 1992-06-14 |
| CA2092700C true CA2092700C (en) | 1995-03-21 |
Family
ID=25899286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002092700A Expired - Fee Related CA2092700C (en) | 1990-12-13 | 1991-10-07 | Method and device for attaching an object to a lightweight-construction wall |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0557292B1 (en) |
| JP (1) | JPH06503149A (en) |
| AT (1) | ATE104405T1 (en) |
| AU (1) | AU650483B2 (en) |
| CA (1) | CA2092700C (en) |
| DE (2) | DE4039831C1 (en) |
| DK (1) | DK0557292T3 (en) |
| ES (1) | ES2051602T3 (en) |
| FI (1) | FI930926A (en) |
| FR (1) | FR2670542B1 (en) |
| HK (1) | HK122894A (en) |
| HU (1) | HUT68898A (en) |
| NO (1) | NO178045C (en) |
| SG (1) | SG131094G (en) |
| WO (1) | WO1992010687A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH686637A5 (en) * | 1992-06-18 | 1996-05-15 | Mungo Befestigungstech Ag | Schraubhulse. |
| GB9216853D0 (en) * | 1992-08-05 | 1992-09-23 | Turner Intellect Property Ltd | Fixing method and apparatus |
| FR2728033A1 (en) * | 1994-12-08 | 1996-06-14 | Black & Decker Inc | ANCHORING DEVICE FOR FRIABLE MATERIAL AND PROCESS FOR IMPLEMENTING SUCH A DEVICE |
| DE29509487U1 (en) * | 1995-06-09 | 1995-08-24 | Upat Gmbh & Co, 79312 Emmendingen | Holding element for attaching an object to a lightweight building material wall |
| DE19805757C2 (en) * | 1998-02-13 | 2001-03-22 | Holland Letz Felo Werkzeug | Drill and screw-in device for dowels for lightweight materials |
| ATE329163T1 (en) | 2001-10-01 | 2006-06-15 | Mungo Befestigungstech Ag | SCREW DOWEL |
| JP4519412B2 (en) * | 2003-04-09 | 2010-08-04 | 孝和建商株式会社 | How to install parts on the building surface |
| GB0315548D0 (en) | 2003-07-03 | 2003-08-06 | Plasplugs Ltd | Wall plug |
| DE102004021484B4 (en) | 2004-04-30 | 2018-11-29 | Böllhoff Verbindungstechnik GmbH | Method for producing a connection arrangement |
| DE102005000147A1 (en) * | 2005-11-02 | 2007-05-03 | Hilti Ag | Insulation board fastening unit for e.g. wall, has dowel shaft extending along longitudinal axis and comprising two ends, and pressure plate arranged at one end of shaft, where pressure plate is designed as multi-start coil |
| FR2895295B1 (en) * | 2005-12-23 | 2009-06-05 | Black & Decker Inc | SCREWDRIVER SCREWDRIVER BIT AND SCREWDRIVER COMPRISING SUCH A TIP |
| DE102011002637A1 (en) | 2011-01-13 | 2012-07-19 | Hilti Aktiengesellschaft | Screw anchor and method for producing a screw anchor |
| DE102012102663A1 (en) * | 2012-03-28 | 2013-10-02 | Aesculap Ag | Implant screw attached to bone plate, has groove-shaped longitudinal slot that is formed in region of screw shaft |
| JP7448187B2 (en) * | 2019-11-29 | 2024-03-12 | 浅川組運輸株式会社 | Binding tool and joining method using the same |
| DE102020107225A1 (en) | 2020-03-17 | 2021-10-07 | Fischerwerke Gmbh & Co. Kg | Plasterboard anchor and combination of the plasterboard anchor with a drilling and turning tool |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2806706A (en) * | 1953-04-02 | 1957-09-17 | Fitch Clifford Earl | Insert bit and holder |
| US3289290A (en) | 1963-03-14 | 1966-12-06 | Raymond P Sandor | Method and apparatus for installing fasteners |
| DE2256938C3 (en) * | 1972-11-21 | 1985-10-03 | Upat Gmbh & Co, 7830 Emmendingen | Insert sleeve for plaster walls or the like. |
| DE2419111C2 (en) * | 1974-04-20 | 1986-04-24 | Upat Gmbh & Co, 7830 Emmendingen | Insert sleeve for screwing into a hole |
| EP0042358A1 (en) * | 1980-06-16 | 1981-12-23 | Ciba-Geigy Ag | Organic sulphides and their use as stabilizers in organic materials |
| US4601625A (en) * | 1984-05-11 | 1986-07-22 | Illinois Tool Works Inc. | Self drilling threaded insert for drywall |
| FR2653503B1 (en) * | 1989-10-25 | 1992-01-24 | Legrand Sa |
-
1990
- 1990-12-13 DE DE4039831A patent/DE4039831C1/en not_active Expired - Fee Related
-
1991
- 1991-10-07 ES ES91917329T patent/ES2051602T3/en not_active Expired - Lifetime
- 1991-10-07 JP JP3515728A patent/JPH06503149A/en active Pending
- 1991-10-07 AU AU86258/91A patent/AU650483B2/en not_active Ceased
- 1991-10-07 EP EP91917329A patent/EP0557292B1/en not_active Expired - Lifetime
- 1991-10-07 HU HU9301347A patent/HUT68898A/en unknown
- 1991-10-07 WO PCT/DE1991/000792 patent/WO1992010687A1/en active IP Right Grant
- 1991-10-07 DE DE59101403T patent/DE59101403D1/en not_active Expired - Lifetime
- 1991-10-07 AT AT91917329T patent/ATE104405T1/en not_active IP Right Cessation
- 1991-10-07 DK DK91917329.4T patent/DK0557292T3/en active
- 1991-10-07 CA CA002092700A patent/CA2092700C/en not_active Expired - Fee Related
- 1991-12-05 FR FR9115097A patent/FR2670542B1/en not_active Expired - Fee Related
-
1993
- 1993-03-02 FI FI930926A patent/FI930926A/en not_active Application Discontinuation
- 1993-06-11 NO NO932145A patent/NO178045C/en unknown
-
1994
- 1994-09-09 SG SG131094A patent/SG131094G/en unknown
- 1994-11-10 HK HK122894A patent/HK122894A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SG131094G (en) | 1995-01-13 |
| ES2051602T3 (en) | 1994-06-16 |
| JPH06503149A (en) | 1994-04-07 |
| NO932145L (en) | 1993-06-11 |
| AU650483B2 (en) | 1994-06-23 |
| CA2092700A1 (en) | 1992-06-14 |
| HK122894A (en) | 1994-11-18 |
| HUT68898A (en) | 1995-08-28 |
| FI930926A0 (en) | 1993-03-02 |
| NO178045B (en) | 1995-10-02 |
| NO178045C (en) | 1996-01-10 |
| WO1992010687A1 (en) | 1992-06-25 |
| FR2670542B1 (en) | 1995-06-16 |
| NO932145D0 (en) | 1993-06-11 |
| DE4039831C1 (en) | 1992-06-04 |
| EP0557292B1 (en) | 1994-04-13 |
| HU9301347D0 (en) | 1993-09-28 |
| ATE104405T1 (en) | 1994-04-15 |
| AU8625891A (en) | 1992-07-08 |
| DE59101403D1 (en) | 1994-05-19 |
| DK0557292T3 (en) | 1994-08-22 |
| FI930926A (en) | 1993-03-02 |
| FR2670542A1 (en) | 1992-06-19 |
| EP0557292A1 (en) | 1993-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |