EP0426918A1 - Outil automatique pour fixation des boulons de maçonnerie - Google Patents

Outil automatique pour fixation des boulons de maçonnerie Download PDF

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Publication number
EP0426918A1
EP0426918A1 EP89311626A EP89311626A EP0426918A1 EP 0426918 A1 EP0426918 A1 EP 0426918A1 EP 89311626 A EP89311626 A EP 89311626A EP 89311626 A EP89311626 A EP 89311626A EP 0426918 A1 EP0426918 A1 EP 0426918A1
Authority
EP
European Patent Office
Prior art keywords
anchor
drill
tool
sleeve
section
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.)
Ceased
Application number
EP89311626A
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German (de)
English (en)
Inventor
Louis N. Giannuzzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GIANNUZZI LOUIS
Original Assignee
GIANNUZZI LOUIS
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 GIANNUZZI LOUIS filed Critical GIANNUZZI LOUIS
Priority to EP89311626A priority Critical patent/EP0426918A1/fr
Publication of EP0426918A1 publication Critical patent/EP0426918A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/005—Attachments or adapters placed between tool and hammer

Definitions

  • This invention relates generally to a setting tool for driving an anchor having a shaped shank into a hole drilled in masonry, and more particularly to an automatic tool opera­tively coupled to a standard rotary-impact drill-hammer which acts to hammer the shank of the anchor into the hole so as to cause it to lodge securely therein.
  • masonry as used herein encompasses not only brickwork and concrete but all rigid, non-metallic structural materials such as stone and plaster.
  • the conventional practice for this purpose is to make use of an anchor bolt assembly which includes an expansible shell that is caused to expand when the bolt is turned by a wrench or other torque-producing tool, the expanded shell gripping the wall of the hole to securely retain the bolt therein.
  • a practical drawback of the "Rawl Drive” anchor is that the bulge created by the split and expanded half section has a maximum transverse dimension which is necessarily significantly greater than the diameter of the hole drilled in the masonry, and consequently is greater than the diameter of the mounting hole in the fixture to be attached to the masonry wall by the anchor bolt. Because a "Rawl Drive” anchor, before entering the masonry hole, must first pass through the mounting hole in the metal fixture, the use of conventional fixtures in conjun­tion with “Rawl Drive” anchors is precluded. That is to say, one cannot use the "Rawl Drive” anchor with a fixture whose mounting hole has a diameter which corresponds to that of the drilled hole, which is usually the case, for the Rawl Drive
  • the above-identified copending patent application discloses a one-piece anchor capable being driven axially into a hole drilled in masonry to cause the inserted bolt to lodge securely therein to hold a fixture or other part against the masonry surface.
  • the anchor is constituted by a pre-shaped shank formed of resilient material whose memory is such that when the shank is forcibly deformed it seeks to maintain its original shape, the shank being integral with a drivable head and having a maximum cross section which does not substantially exceed the diameter of the hole.
  • the shank is pre-shaped to include at least one undu­lation which deviates from the longitudinal axis passing through the head to create a shank bend having a peak on one side of the shank and upper and lower bases on the other side thereof.
  • This force seeks to straighten out the bend, the resultant de­formation thereof exerting outward pressures against large contact areas of the wall of the hole at the peak and at the bases, which multi-level pressures strongly resist axial with­drawal of the shank.
  • This one-piece, pre-shaped anchor is now being marketed under the trademark SPIKE and will hereinafter be referred to by this mark.
  • a SPIKE anchor (a) ease of insertion to facilitate high-speed installations, (b) an assured multi-level gripping action when the anchor is fully inserted in the hole, (c) a tight attachment of the fixture or other part held against the masonry surface, (d) a high level of holding power due to relatively large contact surface areas, and (e) an ability to go through the mounting hole of a fixture
  • powered hammers such as pneumatic hammers
  • pneumatic hammers are available which do not entail effort on the part of the user to effect a hammering action
  • these powered hammers must be manipu­lated by the installer to be sure that the hammer correctly strikes the head of the anchor. Should a mis-strike occur, the adjacent masonry region may be damaged.
  • the main object of this invention is to provide an automatic setting tool operatively coupled to a standard rotary-impact drill-hammer for driving an anchor into a hole drilled in masonry, whereby the installation of anchors can be carried out in a simple, almost effortless and rapid manner.
  • an object of this invention is to provide a setting tool which is in a form that lends itself to be slipped onto a drill bit gripped by the chuck of a standard drill-hammer, or in a form that lends itself to be directly gripped by the chuck, the tool in either form acting to drive an anchor into a drilled masonry hole.
  • the first operator can make use of a standard drill-hammer with a suitable drill bit held in its chuck to drill the masonry holes, while the second operator can use a like drill-hammer with the direct-coupled form of setting tool gripped in its chuck to drive anchors into holes drilled by the first operator.
  • a significant advantage of the invention is that it obviates the need for skill on the part of the installer, for the head of each anchor to be driven is nested in a tool socket and remains therein as the anchor is being hammered, so that the anchor is never misaligned with the tool and there is no danger of mis-striking. Because of this advantage, no damage is inflicted on masonry regions adjacent the holes, even when the installer is under pressure to install hundreds of anchors in a relatively short period and may therefore tend to become careless.
  • Yet another object of the invention is to provide setting tools of the above type which can be manufactured at low cost and which operate reliably and efficiently.
  • an automatic setting tool operatively coupled to a standard, rotary-­impact drill-hammer for driving the shaped shank of a single piece anchor having an enlarged head into a hole drilled in masonry.
  • the tool includes a rod having a front striker section and a rear holder section, a shoulder being formed at the junc­tion of these sections.
  • the holder section of the rod is adapted either to slip onto a drill bit held in the chuck of the drill-­hammer or to be directly gripped by this chuck, whereby the rod, as it is rotated by the drill-hammer, is caused periodically to undergo a forward and a reverse stroke.
  • a locator sleeve Telescoped over the striker section and slidable thereon is a locator sleeve that is urged by a helical spring interposed between the shoulder and the sleeve to an initial position at which the sleeve projects beyond the front end of the rod to define therewith a socket for nesting the head of the anchor.
  • FIGs. 1 and 2 there is shown a one-­piece, pre-shaped anchor of the type shown in my above-identified copending application, which is drivable into a hole 10 drilled in masonry 11, the anchor serving to attach a fixture 12 against the surface of the masonry, the fixture having a mounting hole 12H.
  • the anchor is constituted by a shank 13 fabricated of carbon or work hardened stainless steel, or other material having a circular cross section whose diameter is constant through­out the length of the shank, the tip 14 of the shank being of reduced diameter and chamfered to facilitate insertion in hole 10.
  • the diameter of hole 10 is equal to or slightly larger than the shank diameter.
  • the upper end of shank 13 is integral with an enlarged head 15 which in the anchor illustrated has a cylin­drical form.
  • SPIKE anchors are also commercially available with mushroom shaped heads.
  • Shank 13 is pre-shaped to create an undulation therein which deviates from the longitudinal axis X passing through the center of head 15 to create a curved bend U which is offset with respect to this axis.
  • the shank is rendered resilient by tempering the metal at a temperature appropriate thereto to impart a memory thereto, such that when the shank is thereafter forcibly deformed, it seeks to recover its original shape.
  • the anchor When, therefore, the anchor is driven by a hammer or other means adapted to strike head 15, the shank 13, as it advances axially into masonry hole 10, forces bend 16 to straighten out, in order to gain entry thereto.
  • This forcible deformation of bend U causes the bend to exert outward pressures against the wall of hole 10 at different levels therein as it seeks to recover its original shape.
  • These lateral pressures offer a considerable resistance to axial withdrawal of the shank from the hole.
  • the anchor despite its simplicity, is capable of supporting substantial loads on the masonry wall.
  • the holding capacity depends, of course, on the dimensions and configurations of the bolt and the nature of its metal. In practice, anchors of this type may be designed for supporting loads as heavy as 2000 lbs. or greater.
  • Bend 16 has a peak P on one side of the shank. As shown in Fig. 1, peak P represents the point of maximum offset from the longi­tudinal axis X of the shank, this point being well outside the periphery of the drilled, non-tapped masonry hole for which the anchor bolt is intended.
  • the bend also has a lower base B1 on the other side of the shank which is at a level below peak P, and an upper base B2 which is at a level above peak P.
  • the resilient bend seeks to recover its original shape, exerts a first holding force F p at a level where its peak presses against the against the opposite side of the hole, and a third holding force F B at a higher level where the base B2 of the bend presses against the opposite side of the wall of the hole.
  • the holding forces are not concentrated at one level but are distributed along the length of the hole to develop a sub­stantial holding power.
  • the setting tool illustrated in Figs. 3, 4 and 5 is adapted to be operatively coupled to a standard electrically-­powered drill-hammer D-H having a chuck 19.
  • the tool generally designated by reference numeral 16, is directly gripped by the jaws of the chuck of the drill-hammer so that when the drill-­hammer is actuated, the tool is then caused to rotate and recip­rocate.
  • rotary-impact drill-­hammers are the Electro-Pneumatic Rotary Hammers marketed by AEG, such as models PH 38 and PH 16RL. These are relatively light-weight and utilize and electro-pneumatic hammering system with very high impact for drilling into extremely hard concrete.
  • AEG Electro-Pneumatic Rotary Hammers
  • a piston is caused by an eccentric to reciprocate within a cylinder.
  • a free-floating percussive body In front of the piston is a free-floating percussive body. When the piston reverses direction in the cylinder, it compresses the air therein to move the percussive body forward to strike the drill bit. This action takes place thousands of times per minute.
  • Tool 16 includes a rod of stainless steel or other suitable high-strength, corrosion-resistant material which is machined to define a front striker section 17 and a rear holder section 18.
  • Holder section 18 is provided with a first pair of diametrically-opposed, elongated grooves 18G1, and a second and smaller pair of grooves 18G2, the first pair lying on a diametrical axis normal to the diametrical axis passing through the second pair.
  • These grooves correspond to those found on standard drill bits and serve to prevent slippage of the tool when gripped by the jaws of the chuck.
  • leading portion 18L of rear section 18 is of enlarged diameter to define at the junction of this section and front section 17 of the rod an abutment or shoulder 20.
  • Striker section 17 of the rod is slidable relative to sleeve 21 within limits fixed by a longitudinal slot 22 on the sleeve in which is trapped a pin 23 anchored on the front section.
  • a helical compression spring 24 Interposed between sleeve 21 and shoulder 20 and surrounding front section 17 is a helical compression spring 24.
  • Spring 24 urges sleeve 21 to project beyond the front end of front section 17 to an extent limited by pin 23 which then abuts the rear end of slot 22, as shown in Figs. 3 and 4.
  • the maximum extent to which sleeve 21 can be retracted on the front section 17 and in doing so compress spring 24, is limited by the front end of slot 22 which then abuts pin 23.
  • the striker section 17 of the rod which is being reciprocated by drill-hammer DH then proceeds with each forward stroke to drive the anchor deeper into the hole.
  • sleeve 21 comes into contact with the fixture 12 being fastened. With repeated strikes, the bend is straightened out and the shank is hammered home in the drilled hole.
  • the tool shown in Figs. 3 to 5 is especially useful in roofing installations and in similar types of work where more than one operator is available for installing a large number of SPIKE anchors.
  • one operator uses a standard drill-hammer with a drill bit gripped in its chuck just to drill holes.
  • Another operator, also equipped with a standard drill-hammer operatively couples the setting tool to his drill-hammer, his job being just to drive in the SPIKE anchors.
  • these operators can drill holes in the roofing and drive SPIKE anchors therein at a remarkably rapid rate without in any way doing damage to the masonry regions surrounding the holes.
  • the tool is adapted to slip onto a drill bit suitable for masonry, such as drill bit 28.
  • This bit is provided with a front drilling section 28F having a spiral cutting thread and a carbide tip, and a holding rear section 28R adapted to fit into and be gripped by the jaws of chuck 19 of a standard drill-hammer.
  • the holding section of the drill bit is similar to the corresponding section 18 of the setting tool shown in Figs. 3 and 4.
  • Setting tool 27 is adapted to slip over the drilling section 28F of the drill bit, so that after an installer drills a hole with his drill-hammer, he can then slip setting tool 27 over the drill bit and proceed to hammer in a pre-shaped anchor.
  • Form B setting tool over Form A is that in order to couple the Form A setting tool to a drill-hammer, one must first remove the drill bit therefrom, whereas the Form B tool does not have this requirement, for the tool slips over the bit.
  • the Form A setting tool is best suited, therefore, for those situations in which two drill-hammers and two operators are available; one using a bit to drill holes and the other using a setting tool to hammer anchors into the drilled holes.
  • the Form B setting tool is best suited for those situations in which only one drill-hammer and one operator are available, for the same drill hammer can then be used both to drill a hole and to drive an anchor into the drilled holes.
  • the Form B setting tool includes a rod having a front striker section 29 and a rear holder section 30, a sleeve 31 being telescoped on the front section and being retained thereon by a pin 32 anchored on the front section and trapped within a slot 33 formed in the sleeve.
  • a helical spring 34 surrounding the front section is interposed between sleeve 31 and a shoulder 30Sformed at the junction of the front and rear sections of the rod.
  • the Form B setting tool has an arrange­ment in regard to its front section which corresponds to that included in the Form A tool.
  • the difference resides in the nature of rear section 30, which in Form B is provided with a bore 35 that extends along the longitudinal axis of the rod.
  • Bore 35 has a depth and form adapted to accommodate the full length of the front section 28F of the drill bit 28 as well as the enlarged conical shoulder 28S at the junction of front section 28F and rear section 28R.
  • the rear end of bore 35, which is shaped to accommodate shoulder 28S of the bit is provided with an O-ring 36 which frictionally engages shoulder 28S to retain the tool in the bit.
  • drill bit 28 When, as shown in Fig. 9, drill bit 28 is gripped by chuck 19 of the drill-hammer and setting tool 27 is slipped over the bit and retained thereby, so that the setting tool is opera­tively coupled to the drill-hammer, one can then place head 15 of an anchor in the socket 37 defined between the front end of front section 29 of the rod and the projecting end of sleeve 31 and drive this anchor into a hole previously drilled in masonry by the same drill bit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP89311626A 1989-11-09 1989-11-09 Outil automatique pour fixation des boulons de maçonnerie Ceased EP0426918A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89311626A EP0426918A1 (fr) 1989-11-09 1989-11-09 Outil automatique pour fixation des boulons de maçonnerie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89311626A EP0426918A1 (fr) 1989-11-09 1989-11-09 Outil automatique pour fixation des boulons de maçonnerie

Publications (1)

Publication Number Publication Date
EP0426918A1 true EP0426918A1 (fr) 1991-05-15

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Family Applications (1)

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EP89311626A Ceased EP0426918A1 (fr) 1989-11-09 1989-11-09 Outil automatique pour fixation des boulons de maçonnerie

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741217A1 (fr) * 1995-05-02 1996-11-06 Helifix Limited Système de fixation à sec
GB2314287A (en) * 1996-06-19 1997-12-24 John Terrance Crilly Power tool with a fitment
DE20119575U1 (de) * 2001-12-03 2003-04-03 Fröhlich, Franz, 87700 Memmingen Einschlagvorsatz
CN113874171A (zh) * 2019-04-15 2021-12-31 因温特奥股份公司 用于将锚杆锤击钉入钻孔中的安装工具和方法
CN114654430A (zh) * 2022-03-09 2022-06-24 永康市晓诚电器有限公司 双速多功能电锤及电锤的使用方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1298953B (de) * 1963-11-02 1969-07-03 Impex Essen Vertrieb Werkzeugfutter, insbesondere fuer selbstbohrende Spreizduebel setzende Elektro- oderPresslufthaemmer
US3518915A (en) * 1968-11-01 1970-07-07 Illinois Tool Works One-piece expandable anchor fastener
US3894469A (en) * 1973-01-05 1975-07-15 Nordisk Kartro Ab Fastener
FR2389439A1 (fr) * 1977-05-02 1978-12-01 Hilti Ag
EP0063679A2 (fr) * 1981-04-18 1982-11-03 Fischerwerke Arthur Fischer GmbH & Co. KG Dispositif de perçage pour la réalisation de trous avec des cavités au fond des trous
EP0302202A2 (fr) * 1987-08-07 1989-02-08 Fischerwerke Arthur Fischer GmbH & Co. KG Outil pour la pose d'éléments de fixation
WO1989006179A1 (fr) * 1987-12-28 1989-07-13 Gavriel Bavli Dispositif de montage de boulon a coquilles d'expansion

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1298953B (de) * 1963-11-02 1969-07-03 Impex Essen Vertrieb Werkzeugfutter, insbesondere fuer selbstbohrende Spreizduebel setzende Elektro- oderPresslufthaemmer
US3518915A (en) * 1968-11-01 1970-07-07 Illinois Tool Works One-piece expandable anchor fastener
US3894469A (en) * 1973-01-05 1975-07-15 Nordisk Kartro Ab Fastener
FR2389439A1 (fr) * 1977-05-02 1978-12-01 Hilti Ag
EP0063679A2 (fr) * 1981-04-18 1982-11-03 Fischerwerke Arthur Fischer GmbH & Co. KG Dispositif de perçage pour la réalisation de trous avec des cavités au fond des trous
EP0302202A2 (fr) * 1987-08-07 1989-02-08 Fischerwerke Arthur Fischer GmbH & Co. KG Outil pour la pose d'éléments de fixation
WO1989006179A1 (fr) * 1987-12-28 1989-07-13 Gavriel Bavli Dispositif de montage de boulon a coquilles d'expansion

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741217A1 (fr) * 1995-05-02 1996-11-06 Helifix Limited Système de fixation à sec
EP1057948A3 (fr) * 1995-05-02 2001-03-14 Helifix Limited Système de fixation à sec
GB2314287A (en) * 1996-06-19 1997-12-24 John Terrance Crilly Power tool with a fitment
GB2314287B (en) * 1996-06-19 2001-01-10 John Terrance Crilly Hand held power tools
DE20119575U1 (de) * 2001-12-03 2003-04-03 Fröhlich, Franz, 87700 Memmingen Einschlagvorsatz
CN113874171A (zh) * 2019-04-15 2021-12-31 因温特奥股份公司 用于将锚杆锤击钉入钻孔中的安装工具和方法
CN114654430A (zh) * 2022-03-09 2022-06-24 永康市晓诚电器有限公司 双速多功能电锤及电锤的使用方法

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