US3742591A - Method of securing anchoring members in high-strength steel - Google Patents

Method of securing anchoring members in high-strength steel Download PDF

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Publication number
US3742591A
US3742591A US00091803A US3742591DA US3742591A US 3742591 A US3742591 A US 3742591A US 00091803 A US00091803 A US 00091803A US 3742591D A US3742591D A US 3742591DA US 3742591 A US3742591 A US 3742591A
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Prior art keywords
anchoring member
diameter
blind bore
strength steel
anchoring
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Expired - Lifetime
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US00091803A
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A Ritter
K Walser
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Hilti AG
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Hilti AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49945—Assembling or joining by driven force fit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53839—Puller or pusher means, contained force multiplying operator having percussion or explosive operator

Definitions

  • a blind bore having a diameter slightly smaller than that of the diameter of the anchoring member is formed in the high-strength steel member, then, after aligning the anchoring member with the blind bore, it is driven into the bore using an explosive charge to supply the driving force.
  • the present invention is directed to a method of securing anchoring members in high-strength steel members,'and particularly, it is directed to a process of atcostly.
  • the rails have been provided with bores and the conductor cable straps with cylindrically shaped copper collars which fit into the bores and then an expansion bolt is driven into the collar to secure it within the bore.
  • This alternative method has the disadvantage that a large diameter bore is required which weakens the strength of the rail and, further, it has been found that a durable attachment of the cable strap cannot be insured using this method.
  • the primary object of the present invention is to provide an economically feasible method of attaching conductor cables to railroad rails which is safe in all respects and overcomes the disadvantages previously experienced in effecting such connections.
  • a blind hole is bored into the rail at the point at-which the cable is to be secured, preferably in the region of the rail web, then after aligning a threaded bolt with the blind hole, it is driven into the hole by means of an explosive-charge operated setting member.
  • the hole is bored so that it is approximately three-tenths to fivetenths mm, and preferably four-tenths mm, less than the diameter of the bolt.
  • the advantage is gained of using an economical explosive-charge bolt setting operation, although the strength of the rail steel is 70 to 80 kg/cm, that is, the steel strength is considerably higher than that which can normally be used with bolt setting members using an explosive charge for the driving force.
  • the blind hole bored into the rail is desirable to prevent faulty indications in rail testers.
  • FIG. 1 is a sectional representation of the drilling operation in accordance with the present invention
  • FIG. 2 is a sectional representation of theanchoring member setting operation in accordance with the present invention.
  • FIG. 3 is a sectional view illustrating a bolt driven into the railroad rail with a cable strap fully fastened to the rail by means of the bolt.
  • a railroad rail 1 supports a drill holding device 2, the device 2 consists of an inverted U-shaped clip 2a which presses a centering chuck 2b against the web 1a of the rail.
  • a drill 3 driven by a commercial drilling machine not shown, is guided in a centering sleeve or stop 4 positioned within the centering chuck 2b.
  • the centering sleeve 4 is withdrawn from the centering chuck and its place is taken by the front barrel por tion 6a of a setting member 6 which is securely held within the centering chuck.
  • a bolt 7 is driven into the blind bore 5.
  • FIG. 3 the bolt is shown fully inserted and secured within the rail web 1a with the current-carrying cable strap 8 securely mounted on the bolt between a pair of washers 9 held in place by a nut 10 threaded on the bolt.
  • the method of the present invention is not limited to the securement of anchoring members into railroad rails, but can be utilized wherever there is a problem of making attachments to highstrength steels.
  • a method for driving and securing an anchoring member into a high-strength steel member comprising the steps of drilling into said steel member a blind bore having a diameter which is slightly smaller than the diameter of said anchoring member to be inserted, aligning said anchoring member with said blind bore, positioning an explosive charge relative to said anchoring member in a location for driving said anchoring member into said blind bore, and detonating said explosive charge to drive said anchoring member into said blind bore.
  • said anchoring member is a bolt having a cylindrical shank and a flattened end, with said cylindrical shank having a diameter between 5 to 6mm.
  • said blind bore is formed with a depth of between 10 'to 12 mm. and with a diameter of between three-tenths to five-tenths mm. less than the diameter of said anchoring member.

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  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Clamps And Clips (AREA)
  • Connection Of Plates (AREA)

Abstract

In fixing anchoring members in high-strength steel members, such as securing bolts in railroad rails, a blind bore having a diameter slightly smaller than that of the diameter of the anchoring member, is formed in the high-strength steel member, then, after aligning the anchoring member with the blind bore, it is driven into the bore using an explosive charge to supply the driving force.

Description

United States Patent [1 1 Ritter et al.
111 3,742,591 (451 July 3,1973
METHOD OF SECURING ANCHORING MEMBERS lN HIGH-STRENGTH STEEL Inventors: Adolf Ritter, Mauren; Karl Walser,
Waldteile,'both of Liechtenstein Assignee: Hilti Aktiengesellschaft Schann, Fuerstentum, Liechtenstein Filed: Nov. 23, 1970 Appl. No.: 91,803
Foreign Application Priority Data Dec. 8, I960 (iermuny ..l 196] 500.
US. Cl 29/525, 29/254, 227/10 Int. Cl 823p 19/02 Field of Search 29/42l E, 525, 254;
References Cited UNITED STATES PATENTS l2/l9l8 Mead .29/421 E UX 2,3l6,l l2 Temple 29/421 E X 3.()6l,834 l H1962 Temple ct al., 227/9 3,l8l,760 5/l965 Catlin et al. 227/10 FOREIGN PATENTS OR APPLICATIONS 494,597 lO/l938 Great Britain ..'29/5Z5 l ,336, l 47 7/ l 963 France 29/525 Primary Examiner-Charlie T. Moon Attorney-McGhw & Toren 57 1 ABSTRACT In fixing anchoring members in high-strength steel members, such as securing bolts in railroad rails, a blind bore having a diameter slightly smaller than that of the diameter of the anchoring member, is formed in the high-strength steel member, then, after aligning the anchoring member with the blind bore, it is driven into the bore using an explosive charge to supply the driving force.
2 Claims, 3 Drawing Figures PAIENIEDJULS m 3.742.591
SHEET 1 BF 2 F liq. 1
INVENTU ADOLF rune? KARL WALSER m a e/04764017.
ATTORN EYS PATENTED JUL 3 I975 SHEET 2 OF 2 INVENTO s ADOLF RITTE KARL WALSER A cj wEvs METHOD OF SECURING ANCHORING MEMBERS IN HIGH-STRENGTH STEEL SUMMARY OF THE INVENTION The present invention is directed to a method of securing anchoring members in high-strength steel members,'and particularly, it is directed to a process of atcostly.
In an alternative method the rails have been provided with bores and the conductor cable straps with cylindrically shaped copper collars which fit into the bores and then an expansion bolt is driven into the collar to secure it within the bore. This alternative method has the disadvantage that a large diameter bore is required which weakens the strength of the rail and, further, it has been found that a durable attachment of the cable strap cannot be insured using this method.
Therefore, the primary object of the present invention is to provide an economically feasible method of attaching conductor cables to railroad rails which is safe in all respects and overcomes the disadvantages previously experienced in effecting such connections.
In accordance with the present invention, initially, a blind hole is bored into the rail at the point at-which the cable is to be secured, preferably in the region of the rail web, then after aligning a threaded bolt with the blind hole, it is driven into the hole by means of an explosive-charge operated setting member. The hole is bored so that it is approximately three-tenths to fivetenths mm, and preferably four-tenths mm, less than the diameter of the bolt.
By means of the present invention the advantage is gained of using an economical explosive-charge bolt setting operation, although the strength of the rail steel is 70 to 80 kg/cm, that is, the steel strength is considerably higher than that which can normally be used with bolt setting members using an explosive charge for the driving force. The blind hole bored into the rail is desirable to prevent faulty indications in rail testers.
In accordance with the method of the present inven- I tion, it is possible to insure a safe current conduction between the threaded bolts and the rails as well as to provide an extraction value of about 2,000 kg by using a M10 threaded bolt which matches actual conditions and has a rounded or flattened front end and a cylindrical cross-section, and, further, where the shank diameter of the bolt is 5.3 mm and is driven into a blind bore having a diameter of 5 mm.
In drilling the hole or bore in the web of the rail, a known drill holding device with acentering stop is used. To facilitate the axial alignment of the bolt in the explosive charge actuated setting member with the blind bore, the centering stop or sleeve is simply removed from the drill holding device and the barrel of the setting member is inserted into the opening in the The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its 0perating advantages and specific objects attained by its uses, reference should be had to the accompanying drawing and descriptive matter in whichthere is illustrated a preferred embodiment of the invention.
BRIEF DESCRIPTION OF THE DRAWING In the Drawing:
FIG. 1 is a sectional representation of the drilling operation in accordance with the present invention;
FIG. 2 is a sectional representation of theanchoring member setting operation in accordance with the present invention; and
FIG. 3 is a sectional view illustrating a bolt driven into the railroad rail with a cable strap fully fastened to the rail by means of the bolt.
DETAILED DESCRIPTION OF THE INVENTION As shown in FIG. 1, a railroad rail 1 supports a drill holding device 2, the device 2 consists of an inverted U-shaped clip 2a which presses a centering chuck 2b against the web 1a of the rail. In the first step of the method according to the present invention, a drill 3 driven by a commercial drilling machine, not shown, is guided in a centering sleeve or stop 4 positioned within the centering chuck 2b.
After the completion of the blind bore 5, note FIG. 2, the centering sleeve 4 is withdrawn from the centering chuck and its place is taken by the front barrel por tion 6a of a setting member 6 which is securely held within the centering chuck. By firing an explosive charge within the setting member, a bolt 7 is driven into the blind bore 5. In FIG. 3 the bolt is shown fully inserted and secured within the rail web 1a with the current-carrying cable strap 8 securely mounted on the bolt between a pair of washers 9 held in place by a nut 10 threaded on the bolt.
It can be appreciated that the method of the present invention is not limited to the securement of anchoring members into railroad rails, but can be utilized wherever there is a problem of making attachments to highstrength steels.
What is claimed is:
1. A method for driving and securing an anchoring member into a high-strength steel member, said method comprising the steps of drilling into said steel member a blind bore having a diameter which is slightly smaller than the diameter of said anchoring member to be inserted, aligning said anchoring member with said blind bore, positioning an explosive charge relative to said anchoring member in a location for driving said anchoring member into said blind bore, and detonating said explosive charge to drive said anchoring member into said blind bore.
2. A method according to claim 1, wherein said anchoring member is a bolt having a cylindrical shank and a flattened end, with said cylindrical shank having a diameter between 5 to 6mm., and wherein said blind bore is formed with a depth of between 10 'to 12 mm. and with a diameter of between three-tenths to five-tenths mm. less than the diameter of said anchoring member.

Claims (2)

1. A method for driving and securing an anchoring member into a high-strength steel member, said method comprising the steps of drilling into said steel member a blind bore having a diameter which is slightly smaller than the diameter of said anchoring member to be inserted, aligning said anchoring member with said blind bore, positioning an explosive charge relative to said anchoring member in a location for driving said anchoring member into said blind bore, and detonating said explosive charge to drive said anchoring member into said blind bore.
2. A method according to claim 1, wherein said anchoring member is a bolt having a cylindrical shank and a flattened end, with said cylindrical shank having a diameter between 5 to 6mm., and wherein said blind bore is formed with a depth of between 10 to 12 mm. and with a diameter of between three-tenths to five-tenths mm. less than the diameter of said anchoring member.
US00091803A 1969-12-08 1970-11-23 Method of securing anchoring members in high-strength steel Expired - Lifetime US3742591A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691961500 DE1961500A1 (en) 1969-12-08 1969-12-08 Fastening method

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US (1) US3742591A (en)
CA (1) CA937033A (en)
CH (1) CH530884A (en)
DE (1) DE1961500A1 (en)
FR (1) FR2073030A5 (en)
GB (1) GB1308347A (en)
SE (1) SE389630B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476615A (en) * 1982-07-06 1984-10-16 John Cook Tool for removing and reapplying rivets
US4505018A (en) * 1982-09-08 1985-03-19 Jet Research Center, Inc. Underwater stud gun system and method for attaching an article to an underwater structure
US4637113A (en) * 1982-07-06 1987-01-20 John Cook Tool for removing and reapplying rivets
US4719688A (en) * 1986-01-08 1988-01-19 Mccrea Charles Manufacturing a plaque with an insert therein
JP2004353443A (en) * 2003-05-26 2004-12-16 Freyssinet Internatl (Stup) Method for overlocking at least one strand in a fixed block and system for overlocking at least one strand in a fixed block
DE102005019877A1 (en) * 2005-04-28 2006-11-02 Airbus Deutschland Gmbh Clamping arrangement for joining two layers, comprises combined clamping- and adapter-sleeve
CN103084612A (en) * 2013-01-16 2013-05-08 安徽艾诺克工矿机械设备有限公司 Rail drilling auxiliary device of pneumatic rail drill
US20240218892A1 (en) * 2017-04-19 2024-07-04 Hilti Aktiengesellschaft Fastening method and fastening system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849139C2 (en) * 1978-11-13 1986-10-30 Hilti Ag, Schaan Method for setting fasteners in concrete
DE10121269A1 (en) * 2001-04-30 2002-10-31 Hilti Ag fastener

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1286381A (en) * 1917-06-14 1918-12-03 Ohio Brass Co Connecting stud and bond terminal.
GB494597A (en) * 1937-05-24 1938-10-28 Patria Mij Voor Ind Financieri Improvements in the setting or securing of wear or pressure resistance bodies in or on metal parts
US2316112A (en) * 1933-04-28 1943-04-06 Temple Velocity Equipment Inc Bonding device
US3061834A (en) * 1961-07-21 1962-11-06 Mine Safety Appliances Co Tool for removing signal bond terminals from rails
FR1336147A (en) * 1962-06-18 1963-08-30 Method and apparatus for extracting centering rings stuck in a ring hole
US3181760A (en) * 1956-03-29 1965-05-04 Remington Arms Co Inc Captive piston stud driver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1286381A (en) * 1917-06-14 1918-12-03 Ohio Brass Co Connecting stud and bond terminal.
US2316112A (en) * 1933-04-28 1943-04-06 Temple Velocity Equipment Inc Bonding device
GB494597A (en) * 1937-05-24 1938-10-28 Patria Mij Voor Ind Financieri Improvements in the setting or securing of wear or pressure resistance bodies in or on metal parts
US3181760A (en) * 1956-03-29 1965-05-04 Remington Arms Co Inc Captive piston stud driver
US3061834A (en) * 1961-07-21 1962-11-06 Mine Safety Appliances Co Tool for removing signal bond terminals from rails
FR1336147A (en) * 1962-06-18 1963-08-30 Method and apparatus for extracting centering rings stuck in a ring hole

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476615A (en) * 1982-07-06 1984-10-16 John Cook Tool for removing and reapplying rivets
US4637113A (en) * 1982-07-06 1987-01-20 John Cook Tool for removing and reapplying rivets
US4505018A (en) * 1982-09-08 1985-03-19 Jet Research Center, Inc. Underwater stud gun system and method for attaching an article to an underwater structure
US4719688A (en) * 1986-01-08 1988-01-19 Mccrea Charles Manufacturing a plaque with an insert therein
JP2004353443A (en) * 2003-05-26 2004-12-16 Freyssinet Internatl (Stup) Method for overlocking at least one strand in a fixed block and system for overlocking at least one strand in a fixed block
US20050005570A1 (en) * 2003-05-26 2005-01-13 Freyssinet International (Stup) Method of overlocking at least one strand in an anchoring block and system for overlocking at least one strand in an anchoring block
US7614134B2 (en) * 2003-05-26 2009-11-10 Freyssinet Method of overlocking at least one strand in an anchoring block and system for overlocking at least one strand in an anchoring block
DE102005019877A1 (en) * 2005-04-28 2006-11-02 Airbus Deutschland Gmbh Clamping arrangement for joining two layers, comprises combined clamping- and adapter-sleeve
DE102005019877B4 (en) * 2005-04-28 2015-06-11 Airbus Operations Gmbh Clamping-fixing unit for clamping at least two component layers between two printing plates and a combined clamping-drilling process
CN103084612A (en) * 2013-01-16 2013-05-08 安徽艾诺克工矿机械设备有限公司 Rail drilling auxiliary device of pneumatic rail drill
US20240218892A1 (en) * 2017-04-19 2024-07-04 Hilti Aktiengesellschaft Fastening method and fastening system

Also Published As

Publication number Publication date
DE1961500A1 (en) 1971-06-09
SE389630B (en) 1976-11-15
CH530884A (en) 1972-11-30
GB1308347A (en) 1973-02-21
CA937033A (en) 1973-11-20
FR2073030A5 (en) 1971-09-24

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