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
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
  • F16L3/22—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals
  • F16L3/237—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals for two pipes
• • 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
  • F16B37/00—Nuts or like thread-engaging members
  • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
  • F16B37/041—Releasable devices
  • F16B37/042—Releasable devices locking by rotation

Definitions

• the present invention relates to an arrangement in screw bolts having a fixed head at one end thereof and threads for a tightening nut at the opposite end portion, and intended for mutually connecting at least two members formed with aligned through-going holes for the bolt shaft, so that the screw bolt, in the operative position thereof, with its head is resting pressingly against an external surface of one member and, with its nut, against an oppositely directed external surface of the other member.
• the intermediate members are only required to have through-going holes for the bolt shaft, aligned with the holes of the two first-mentioned members.
• the present screw bolt functions as a through-going connecting bolt.
• the invention relates to shaping and designs of those members to be connected by means of said screw bolt, in the form of fixation means having snap action properties and being adapted to keep the members temporarily in position in relation to each other, at least until the bolt connection has been established.
• fixation means facilitate the use of the screw bolt according to the invention, and fixation means as well as screw bolt have been formed with a view to allow a rapid interconnection of the members to be connected, without having to resort to the application of many loose parts such as additional bolts, nuts, discs, etc. which, additionally, are impossible or very difficult to insert where space is very limited, such as when a nut to be tightened is impossible or very difficult to reach, e.g. if being positioned behind (beneath/above) one or said members.
• the invention has a very wide field of application and will, generally, be useful whereever there is a need for a expeditious assemblage of parts or members without the use of additional bolts, pins, studs, washers, etc., and especially in cases wherein the space behind, above and/or beneath one or the parts to be connected, is so narrow that a tightening operation would be very difficult to perform.
• a potential field of application for a useful utilization of the invention is represented by the so-called cable paths or ladders to which pipe lines, pipes for the drawing-through of conduits, cables, etc., are to be attached by means of perforated fixation bands, clamps, clips and the like, and wherein the interconnection between the cable paths or ladders and the fixation bands and/or the clips have to be secured by means of through-going screw bolts.
• the fixation bands or strips serve for the attachment of cable bundles; the clips being two-part or multi-part and exhibiting two or more through-going grooves, serve the purpose of obtaining a more properly arranged attachment of the pipes.
• clips of this type are attached to the cable path/ladder by means of two through-going bolts carrying tightening nuts and washers.
• the assemblage operations require the handling of many loose parts; besides the connecting means themselves (bolts, nuts, washers), the clips parts must be kept together, simultaneously positioning them in relation to the cable path/ladder. Consequently, this assembling work is exceptionally time-consuming. Therefore, the object of the present invention has partly been to improve the screw bolt of the arrangement so that it will cause a substantially simplified assembling work within the general fields indicated introductorily, partly to enable the application of the screw bolt under very restricted space conditions also, and partly to design the parts or members to be connected in order to enable their appropriate cooperation with such a locking bolt. Locking bolts having a screwed-on (not tightened) nut and, possibly, a threaded-on washer are hereby applicable.
• the clips to be used in connection with such a screw bolt in such a manner that they facilitate the application of said screw bolt, in that they, through a snapping-on operation, are fastened temporarily to the cable path/ladder or similar support or substrate element.
• the separate parts of two-part or multi ⁇ part clips are to be snapped together prior to the passage of the screw bolt, so that corresponding holes for the bolt shaft are brought to accurate alignment prior to the bolt being inserted and guided through the clip parts and the cable path/ladder, the nut thereafter being tightened in order to establish a secure connection.
• parts or members to be connected i.e. the separate clip parts on the one hand and the clip and the cable path/ladder on the other hand, are to be positioned and kept temporarily together.
• the screw bolt according to the invention being of the kind indicated introductorily, has a head distinguishing itself through an olong circumferential shape.
• said aligned holes in those members e.g. fixation strips or clips and cable path or cable ladder, must have a corresponding elongated design, their dimensions in two main directions (length, width) slightly exceeding the corresponding dimensions of the bolt head.
• the locking bolt When connecting two members having such oblong aligned holes, the locking bolt is inserted, head end in front, completely through the members, until the inner face of the bolt head becomes aligned with the outer face of the adjacent member.
• the clearance behind the last- mentioned member does only have to have an extent in the longitudinal direction of the bolt shaft slightly exceeding the dimension of the bolt head in that direction, i.e. the head thickness.
• an appropriate tool should, of course, be in a position to prevent rotation of the bolt head during said nut tightening attempt, but such an operation is - contrary to the intentions of the present invention - especially cumbersome and may often, additionally, be impossible to accomplish because of space limitations at the bolt head side.
• the bolt shaft immediately adjacent the bolt head, is formed with a widened portion having a larger diametral extent than the diameter of the bolt shaft, more particularly a diametral extent that is slightly smaller than or substantially corresponds to or slightly exceeds, respectively, the lateral dimension of the oblong hole of said members. This widening of the bolt shaft in the area immediately inwardly of the bolt head exhibits its largest diametral extent laterally of the bolt head.
• the oppositely facing external points or faces of the bolt shaft widening are brought into pressing or resting, rotation-preventing engagement with the adjacent opposing longitudinal hole edges, and effect positional fixation of the locking bolt, the longitudinal direction of the head thereof being oriented laterally of the longitudinal direction of the oblong hole.
• the nut at the opposite bolt end may easily be tightened, in order to establish a secure connection of said two, three or more members to be connected, the bolt being through-going in the end position, resting urgingly with the head and nut, respectively, against the two oppositely facing external faces of the assembly.
• Clips used in association with such locking bolts may advantageously be formed with laterally resilient lips adapted to be brought into engagement with edge portions defining apertures in that member (another clip, a top plate for clips or a cable path/ladder) to which the clip is to be fixed prior to the establishment of said bolt connection.
• Such a design facilitates the assembling work substantially, enabling a snap-like assemblage of said members, so that the holes for the insertion of the bolt shafts are brought into alignment, facilitating the mounting of the locking bolts.
• the oblong holes of fixation strips used with such locking bolts e.g. for the fixation of bundles of cables, instrument pipes, etc., onto a cable path/ladder, do not have to have a longitudinal extent exceeding the largest dimension of the bolt head, because the bolt head then may be brought into an inclined position during the insertion operation.
• Figure 1 shows a perspective view of a locking bolt according to the invention
• Figure 2 is a cross-section along the line II-II of Figure 1, seen in the direction of the arrows;
• Figure 3 shows a perspective view of a somewhat shorter locking bolt, the fixed oblong head thereof being in the course of insertion through an oblong hole of a perforated strip, which may serve as a fixation means for a bundle of cables or the like onto a cable path or ladder, not shown, illustrating that the oblong hole of the fixation strips does not have to have a longitudinal extent exceeding the largest dimension of the bolt head;
• Figure 4 shows a perspective exploded view of a cable path, basic clip and top plate, all formed with aligned oblong holes allowing the bolt head to be inserted therethrough;
• Figure 5 shows, at its left half, a cross-sectional view and, at its right half, an end view of the members of Figure 4, assembled and interlocked;
• Figure 6 shows a perspective fragmentary view of a modified screw bolt, wherein said widening immediately adjacent the inner limitation of the bolt head has parallel oppositely facing surfaces defining the widening in the longitudinal direction of the oblong bolt head.
• the reference numeral 1 generally denotes a screw bolt of the invention, reference numerals 2, 3 and 4 indicating the bolt shaft, an oblong head and a threaded portion of the bolt shaft, opposite the head, respectively.
• a tightening nut 5 is screwed onto the threads 4 and, inwardly of the nut, a washer or the like 6 may be threaded on.
• the bolt shaft 2 Immediately inwardly of the oblong head 3, the bolt shaft 2, according to a first embodiment of Figures 1-3 and 5, is formed with widenings 7,7', see Figure 1 in connection with Figure 2, at diametrally opposite sides of the bolt shaft 2.
• the extreme points of these windenings 7,7' are indicated at 8 and 8', respectively.
• the diametral distance, with respect to the bolt shaft axis, between the extreme points 8,8' of the widenings 7,7' exceeds the bolt shaft diameter guite substantially.
• the distance between the parallel sides of the windenings 7,7', such as 9,9' corresponds with the bolt diameter.
• the locking bolt 1 is shown in combination with a so-called "patent strip", i.e. a flexible standard strip 10 for the fixation of e.g. a cable bundle onto a cable path/ladder.
• a so-called "patent strip” i.e. a flexible standard strip 10 for the fixation of e.g. a cable bundle onto a cable path/ladder.
• This figure illustrates that the longest extension of the through- going holes 11 of the strips does not have to exceed the longitudinal dimension of the bolt head 3, the bolt 1 - head first - because of the slight thickness of the strip 10, i.e. the dimension thereof in the axial direction of the bolt shaft, being able to be threaded through when capsized.
• the flexibility of the fixation strip 10 may also facilitate the threading-through of the bolt head 3.
• the through-going holes are shown to have an oblong shape. However, this is not imperative; the only pre-condition regarding the hole shape being that it allows an complete passage of the bolt head 3, simultaneously as
• members thicker than strips must have oblong through-going holes, wherein the longitudinal extent exceeds the length of the bolt head, the lateral dimension exceeding the width of the bolt head and the shaft diameter, and being smaller than the length of the head.
• Figure 3 shows only a fragment of an assembly, which in the reality will comprise a longer strip, a bundle of cables or the like, surrounded by the strip, two locking bolts - one at each end of the strip - as well as a cable path or ladder having oblong holes, wherethrough the bolt heads 3 are threaded and rotated 90 degrees, in the very same manner as shown for a clip in Figure 5.
• the reference numeral 12 denotes a so-called base clip, 13 indicating the top plate of the same, and 14 a portion of a cable path.
• the through- going holes for the screw bolt head 3 of these members are, in correspondance with Figure 3, denoted 11 ',11" and 11' '', respectively.
• the base clip 12 is, as known per se, formed with e.g. two grooves 15,15' for instrument pipes 16,16' or the like, see Figure 5. However, such clips 12 may exhibit an arbitrary number of parallel grooves of this or a similar kind ,
• the base clip 12 which may be made of spring steel or similar elastic resilient material, has lowermost, at the opposite side walls thereof, wall extensions provided with e.g. punched-out resilient lips 17,17' having an upwardly facing free edge (see especially Figure 5) adapted to co ⁇ operate with surface portions defining holes ll' 1 ' in the cable path 14.
• the free edges of the resilient lips 17,17' might, alternatively, be facing outwardly opposite each other, rather than facing inwardly towards each other; this being adjusted dependent on the mutual location of the holes 11' ' ' of the cable path or of a cable ladder, not shown.
• the top plate 13 is " formed with resilient fixation lips 18, 18 ' , corresponding to the lips of the clip 12 and adapted to co-operate with edge portions defining cavities 19,19" in the side walls of the clip 12.
• the base clip 12 is snapped onto the cable path 14 by means of its resilient lips 17,17', the free edges thereof, in this position, resting urgingly against the bottom side of the cable path, each adjacent one of the holes 11' ' ' thereof, wherethrough the side wall extensions of the clip have been threaded.
• instrument pipes 16, 16' are placed in the grooves 15,15' of the clip 12, whereafter the top plate 13 is snapped into position onto the clip 12, the resilient lips 18,18' engaging fixingly the cavities 19,19' of the clip.
• the bolt 1 is brought, oblong head first, through the holes 11" ,11 ' , 11 ' ' ' until the inner face 3' of the bolt head has passed the surface of the cable path 14 (the bottom face according to Figure 5) facing away from the clip 12.
• this hole must have a lateral dimension which is smaller than the distance between the extreme ends 8,8' of the widenings 7,7', as measured in the longitudinal direction of the bolt in a radial plane, see Figure 2.
• the circumferential shape of the widened bolt shaft portion which according to especially Figure 2 corresponds to a parallelogram, may be subjected to substantial modifications maintaining the intentional or a technically equivalent function; thus, it is sufficient that the widened portion has (diametrally) opposite extreme point/faces, the spacing therebetween exceeding the diameter of the bolt shaft, as measured in the longitudinal direction of the bolt head, and that the hole whose opposing edges with which the widened portion of the bolt is to co-operate, has a lateral dimension substantially exceeding the diameter of the bolt shaft, but slightly larger than or substantially corresponding to or slightly smaller than, respectively, the largest dimension of the widened bolt portion, depending on whether one desires a clamping of the widened portion of the bolt within said hole or whether it merely suffices that the bolt is prevented from rotating.
• Figure 6 shows a modified embodiment of the widened portion of the screw bolt as mentioned in the foregoing section.
• the widening is generally denoted 7".
• the modified widening 7" has a substantially rectangular circumferential shape, the two shorter sides having a extent substantially corresponding to the diameter of the bolt shaft 2, the two longer sides extending in the longitudinal direction of the oblong bolt head 3, having a substantially larger extent, generally corresponding to the spacing between the two opposing edges defining the slot 11, 11 ' , 11" , 11 ' ' ' , through which the bolt is to be threaded during the connection operation.
• the two oppositely directed faces defining the largest dimension of the widening 7", is denoted 8" and 8'' ', respectively.
• the modified bolt design of Figure 6 has a somewhat different mode of operation, but causes so far a technical effect comparable to that of the screw bolt according to the foregoing Figures 1-5.
• the bolt head 3 including the widening 7" is brought completely through the slot 11 of the outermost (last) member of an assembly of two or more interconnectable members, whereafter the bolt is rotated 90 degrees in order to orient the longitudinal direction of the head 3 laterally of the longitudinal direction of the slot, so that the two opposite extreme faces 8" and 8' ' 1 of the widening 7" become oriented in parallel with said opposing slot edges. Since the spacing between the opposite extreme faces 8",8''' of the widening 7" is slightly smaller than the width of the slot, the widening " is capable of being drawn into the slot 11 in this position, thereby preventing rotation of the bolt shaft 2 caused by a torsional moment derived from the nut tightening operation.
• the external lateral and bottom walls of the top plate 13 and clip 12 may be made of steel; the same goes for the cable path/ladder.
• the bottom and lateral walls of the clip surround a plastic body 12' wherein the grooves 15,15' and a substantial portion of the passage hole 11' have been formed.
• the top plate 13 may have a plastic insert 13' .
• a nylon insert 20 may be placed, retaining the nut 5 (and a washer) temporarily in place on the screw bolt 1 prior to the initiation of the assemblage work. This work is, indeed, substantially facilitated when using complete locking bolts, avoiding the use of loose bolts, nuts, washers, locking discs, etc.
• the fixing inter-snap possibility for those members to be interconnected by means of such locking bolts serve the very same work-saving purpose, also through facilitating the mounting of the screw bolts.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Supports For Pipes And Cables (AREA)
• Clamps And Clips (AREA)
• Laying Of Electric Cables Or Lines Outside (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19892749

Family Applications (1)

Country Status (3)

Cited By (5)

Citations (7)

• 1990
  • 1990-01-05 NO NO900033A patent/NO172362C/no not_active IP Right Cessation
  • 1990-12-20 AU AU70472/91A patent/AU7047291A/en not_active Abandoned
  • 1990-12-20 WO PCT/NO1990/000192 patent/WO1991010072A1/en unknown

Patent Citations (7)

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