Classifications

• • 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
  • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
  • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
• • 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
  • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
  • F16B2200/95—Constructional details of connections not covered for in other groups of this subclass with markings, colours, indicators or the like

Definitions

• the present invention relates to a gauge for mounting screws.
• it is frequently necessary to assemble them by screwing at least two parts.
• Such an assembly requires the prior fixing of a cage-nut or a nut on the inner face of the innermost part, in the alignment of a bore passing through the two parts, then the introduction of a screw in this bore from the outside, and the screwing of this screw in the nut cage or in the nut.
• screws 1 comprising a rod 3 of which only the end 5 is threaded, the intermediate portion 7 of the rod 3 extending between this threaded end 5 and the head 9 of the screw being smooth.
• This smooth part 7 intended to pass through the thickness of the two parts, corresponds to the "grip", that is to say to the thickness of materials to be clamped before application of the tightening torque.
• the "grip" of the screw 1 By extension of language, we often speak of the "grip" of the screw 1 to designate the length of the smooth part 7.
• the transition zone between the threaded portion 5 and the smooth portion 7 of the rod 3 defines a shoulder 11 which must never come into abutment on the cage-nut or on a nut when the threaded portion 5 of the screw is completely screwed to the inside the cage-nut or nut.
• the present invention is intended in particular to provide a tool for determining in a simple and immediate manner the length of a screw for cooperating with a nut cage or a nut for assembling at least two parts.
• This object of the invention is achieved with a gauge for mounting a screw in a cage-nut or in a nut for the assembly of at least two parts, this screw comprising a head and a rod with an intermediate portion smooth and threaded end, this gauge comprising a smooth-section rod provided with graduations and threaded end similar to those of said screw, and a ring slidably mounted on said smooth part, the axial length of said ring and the distribution of said graduations being such that when the rod of said gauge is screwed in abutment in said cage-nut or in said nut and said ring is pressed against one of said two parts, the graduation indicated by said ring on said smooth part is representative of the distance separating the thread of said nut-cage or said nut from the outer surface of the workpiece opposite said nut-c
• the gauge according to the invention provides, in a very simple and fast way, an indication on the screw which is suitable for a given assembly. It is no longer necessary to proceed by trial and error to find the right screw for a given assembly: it can save a lot of time.
• the rod of this gauge is surmounted by a knurled head: this knurled head facilitates the gripping of this gauge;
• the sliding ring of this gauge comprises a cutaway: this cutaway facilitates the gripping of this sliding ring;
• FIG. 1 represents an elevational view of a screw described in the preamble of the present description, intended to cooperate with a cage-nut or with a nut for the assembly of at least two parts that can define a box. closed ;
• - Figure 2 shows, in perspective, a gauge according to the invention;
• FIG. 3 represents an axial view of the sliding ring of the gauge according to the invention.
• FIG. 4 shows, in axial section (this section being partial to the sliding ring) and on a larger scale than Figure 2, the gauge according to the invention cooperating with two parts to be assembled with a screw of the type of shown in Figure 1.
• the parts to be assembled are shown schematically in Figure 4, and can thus typically comprise an outer plate 13 and an inner plate 15, these two plates being provided with respective bores 17 and 19 coaxial.
• nut-cage 23 or, alternatively, not shown, a nut, provided with an internal thread 25.
• Such a cage-nut is commonly used in the field of aeronautics, and consists essentially of a nut 27 secured to a plate 29, this plate being attached to the inner plate 15 by appropriate fixing means, symbolized by the lines discontinuous 31 and 33.
• this gauge comprises a head 35 preferably knurled, and a rod 37 having a smooth intermediate portion 39 and one end threaded 41 identical to the threaded end 5 of the screw 1.
• the threaded end 41 comprises on the one hand a thread 43 identical to that of the screw 1, and on the other hand, a stop shoulder 45 similar to the shoulder 11 of the screw 1.
• the smooth portion 39 of the rod 37 comprises, over substantially the entire distance between the head 35 of the thread 41, a series of graduations 47 distributed evenly.
• a ring 49 preferably knurled, is slidably mounted on the rod 37, between the head 35 and the thread 41.
• this ring preferably comprises a flat 51.
• the gauge of FIG. 2 is grasped by its head 35, and the threaded portion 41 of this gauge is engaged in the bores. 17, 19 and in the thread 25 of the cage-nut 23 or a nut (not shown).
• This threaded end 41 is then screwed into the cage-nut 23, by means of the knurled head 35, until the shoulder 45 of this gauge comes into abutment against the end of the thread 25 of the cage-nut 23. or a nut (not shown).
• the present invention provides an extremely simple, manually operated, design gauge for quickly and accurately determining the appropriate "grip" of a screw to assemble. at least two pieces crossing them and cooperating with a cage-nut or with a nut.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Length-Measuring Instruments Using Mechanical Means (AREA)
• A Measuring Device Byusing Mechanical Method (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39767004

Family Applications (1)

Country Status (8)

Families Citing this family (8)

Family Cites Families (23)

• 2008
  • 2008-01-30 FR FR0800502A patent/FR2926879B1/fr active Active
• 2009
  • 2009-01-28 EP EP09720589A patent/EP2234766A2/de not_active Withdrawn
  • 2009-01-28 WO PCT/FR2009/000096 patent/WO2009112696A2/fr not_active Ceased
  • 2009-01-28 CN CN2009801024829A patent/CN102036785B/zh not_active Expired - Fee Related
  • 2009-01-28 US US12/865,066 patent/US8220176B2/en not_active Expired - Fee Related
  • 2009-01-28 RU RU2010135212/02A patent/RU2482956C2/ru not_active IP Right Cessation
  • 2009-01-28 CA CA2711601A patent/CA2711601A1/fr not_active Abandoned
  • 2009-01-28 BR BRPI0906984-4A patent/BRPI0906984A2/pt not_active IP Right Cessation

Non-Patent Citations (1)

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