US3617076A

US3617076A - Fastening clamp

Info

Publication number: US3617076A
Application number: US853412A
Authority: US
Inventors: Warren R Attwood; Herbert J Henry
Original assignee: Unistrut Corp
Current assignee: Unistrut International Corp; Unistrut Corp
Priority date: 1967-10-27
Filing date: 1969-08-27
Publication date: 1971-11-02
Anticipated expiration: 1988-11-02

Abstract

A clamp used with a metal framing system for adjustably supporting an upright member on a structural member. The clamp is of the type having a generally C-shaped configuration and is formed with registering apertures therein for the reception of the upright member therethrough to be retained by pressureexerting means.

Description

linited States Patent 501 Field [72] Inventors Warren R. Attwood Wayne;

Herbert J. Henry, Dearborn Heights, both of Mich.

References Cited disclaimed' Primary Examiner-David J. Williamowsky Assistant Examiner-Wayne L. Shedd Anorney--l-lauke, Gifford and Patalidis [54] FASTENING CLAMP ABSTRACT: A clamp used with a metal framing system for adjustably supporting an upright member on a structural member. The clamp is of the type having a generally C-shaped configuration and is formed with registering apertures therein for the reception of the upright member therethrough to be 6 Claims, 5 Drawing Figs.

retained by pressure-exerting means.

1 1 5 1 mam 256 21 F L C S L U m l 1 2 1 5 5 PATENTEDNuv 2 l97| INVENTORS WARREN R. ATTWOOD HERBERT J, HE Y/ g m ATTORNEYS FASTENING CLAMP CROSS REFERENCE TO RELATED APPLICATION The present invention is a continuation-in-part of application Ser. No. 678,692, filed on Oct. 27, 1967, now U.S. Pat. No. 3,468,567 issued Sept. 23, 1969.

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to fastening clamps and more particularly to an adjustable and demountable fastening clamp for use with metal framing systems.

2. Description of the Prior Art In the development of highway traffie signs of either a temporary or permanent character it has been the practice to use conventional metal post members requiring the driving thereof into the ground or wooden posts requiring post-hole drilling equipment to effect the desired location of these signs. Further to the maintaining of highways in a safe condition there is a need for a variety of traffic control devices such as temporary barricades, shade screening supports for auto headlight beams, and snow fence supports to mention only a few.

With the increased use of guard rails, such as the ones in common use formed of heavy gauge galvanized iron and having a generally W-shaped cross section, it has been recognized that if the aforementioned highway signs and devices could be mounted in cooperation with these guard rail structures there would be a great saving in both man-hours and material. While various means have been used to secure uprights such as sign posts and the like in combination with barrier structures, they usually necessitate drilling holes or slots in the barrier. This not only requires more time and equipment, but does not allow for repositioning the signs or other devices. Also, the placement of holes in the barrier can result in the initiation of rust areas, while reducing the structural integrity of the barrier or other structural member. One clamp used in the above situation and disclosed in application Ser. No. 678,692 comprises a clamp having a generally Cshaped profile that wraps around the barrier eliminating the necessity of drilling holes or slots.

SUMMARY OF THE INVENTION The present invention is an improvement on the clamp referred to in the above application. A pair of tabs extending from opposite edges of the body of the clamp have been added, providing a pair of surfaces which can be coated with a material for reflecting the light from the headlamps of approaching automobiles. A further advantage in the addition of the tabs is the elimination of a knifelike edge formed by the body of the clamp. The tabs provide a smooth surface to approaching traffic as opposed to the sharp and dangerous edge provided by the previous construction.

The invention provides a single piece fastening device having a generally C-shaped profile that is designed to cooperate with a first structural member such as, for example, the standard type highway barrier having a generally W-shaped cross section to adjustably support a second structural member. The fastening device has a body portion having a pair of identical tabs inclined outwardly from opposite edges of the body and forming a pair of reflective surfaces between the body and the first structural member. A pair of interconnected arms with free extremities remote from their junction extend from the body. Each arm comprises a portion inclined outwardly from the body while the free portions, having aligned apertures therein, extend past the first member to receive the second member in the aligned apertures. Fastening means, such as pressure bolts, are located at each end of the body so as to retain the adjustable member, extending through the apertures, in fixed relation to the first member.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the fastening clamp in use in supporting a structural member to a barrier structure;

FIG. 2 is a vertical side elevational view of the upright post and clamp of FIG. 1 illustrating the mode of attachment of the upright to the barrier;

FIG. 3 is a perspective view showing the employment of applicants fastening clamp to support individual sections of bar rier members for use in temporary barricades;

FIG. 4 is a view showing yet another means of employing applicants clamp; and

FIG. 5 is an enlarged sectional view of the apex area of the lower corrugation and the adjacent portion of the clamp.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring nw to the drawings, there is shown in FIG. 1 a perspective view of the fastening clamp 10 in use in supporting a vertical upright member 12 to a horizontal structural member such as a highway barrier, indicated generally at 14. The barrier 14 is in turn supported by being fastened to posts 15 (FIG. 4) by suitable means such as bolts. The means for supporting the permanent barrier 14 forms no part of the instant embodiment and it is within the purview of the disclosure that the members 14 could be used in various ways such as continuous barriers or individual lengths as shown in FIG. 3, for example, without departing from the scope of the present invention.

It is contemplated that the fastening device 10 be made from a single piece of gauge strip material preferably that of springlike nature, such as spring steel or cold rolled metal having springlike characteristics. The strip of material is formed to provide a body 16 having a pair of identical tabs 17 and I9 bent along

bend lines

21 and 23, respectively, forming

surfaces

25 and 27 that in the instant case forms an angle of approximately 50 with the body 16. A pair of arms generally indicated at 18 and 20 extend from the two remaining edges of body 16. Each arm comprises a first planar elbow portion 22 inclined at an angle with the base or body 16 by being bent along bend line 24. In the instant embodiment, the portion 22 forms an angle of approximately 25 with the body 16. The elbow 22 in turn is joined by means of bend line 26 to provide a yield able intermediate portion 28 which projects outwardly at an angle of inclination from the general plane of elbow 22 which in the instant case is shown at 45. Each

arm portion

18 and 20 has free flange portions 30, defined by bend lines 32, at the outer extremities of intermediate portions 28 so as to diverge outwardly from the axis of symmetry 33 of the clamp 10. Each flange portion 30 is formed with registering apertures or openings 34. The aligned apertures 34 in the present embodiment have a general polygonal configuration which may be rectangular as is shown for the reception of a rectangular upright member 12.

In the instant case the upright member 12 is shown in the form of a tubular structural member having a plurality of equally longitudinally spaced perforations 36 provided in each ofthe flat sides 38.

Applicant, of course, does not intend to limit the instant application to any particular type of upright structure and the perforated structural member 12 is disclosed only for purposes of showing one possible post member to be supported by the fastening device 10.

As best shown in FIG. 2, the barrier structure 14 consists of elongated metal elements, each of which is so configured as to form a deep longitudinal corrugation 40 at one edge and a similar deep longitudinal corrugation 42 at the other edge. Between these corrugations there is a flat area indicated at 44. The extreme edges of the barrier elements are shown turned inwardly as indicated at 46 and 48. The barrier elements are usually made from 10 gauge or 12 gauge metal, although other thicknesses may be used if desired. The barrier elements in their corrugated condition are about a foot wide.

As best seen in FIG. 5, each elbow portion 22 is provided with a hole 52 having a nut 54 welded or otherwise fixably secured on the underside thereof which threadably engages pressure bolts 56 for retaining the clamp member 10 and upright 12 as will be described in more detail hereinbelow. It should be noted that the axis of each bolt 56 is positioned normal to the plane of elbow 22 so that the extensions thereof converge at a common point on trace line 33.

In order to releaseably retain the upright 12 in the desired position, it is inserted in the aligned openings 34 so as to extend therethrough after the clamp is located on the barrier 14 at the precise point desired. In the present form of the invention each opening 34 is substantially identical, being generally rectangular in shape with a width of 2 l/l6th inch and a length of 2%th inch which will accommodate uprights having a size within the range of 1% inch square to 2 inches square. It will be further observed that the positioning of rectangular openings 34 is such that they extend into intermediate portion 28 thereby interrupting bend lines 32 to form paired hinged sections.

In operation, when the upright 12 is disposed at the desired horizontal and vertical position, the bolts 56 are tightened to cause their ends 57 to bear against member 14 so that the paired

edges

60 and 62 are drawn against the upright 12 in offset opposed relation. It can be seen in FIG. that each bolt 56 is positioned to contact the outer curved portions of

corrugations

40 and 42, respectively, to place both the clamp body 16 and its adjacent arm portion in tension. By means of this complemental arrangement of the pressure bolts each bolt urges the upright in a direction to bear against the aligning edges 62 while also urging the clamp body 16 in opposed colinear directions to maintain the clamp in fixed symmetrical relation to the barrier member.

It will be understood that the bolt 56, instead of being of conventional design as shown, may have its end 57 roughened, serrated or pointed to firmly bite into the barrier 14 or other structural member being used.

FIG. 4 shows a modified form of the invention wherein the clamp is used to retain a tubular member 70 in fixed position against the barrier 14. In this way an upright post member 72 can be telescoped within the tube 70 and secured by a through bolt indicated at 74. In this way the post 72 can be readily inserted and removed or adjusted vertically by means of the series of cooperating perforations in the

members

70 and 72.

Another feature of applicants clamp resides in the location and size of the aligned rectangular apertures 34 in relation to the overall clamp structure. Besides allowing the upright extending therethrough freedom of axial movement during positioning, the clamp is able to retain uprights having a range of cross-sectional sizes. This is achieved by the aforementioned relationship of the oversize apertures with the bend lines 32, together with the adjustable pressure means supplied by the pair of bolts 56. The fact that the bend lines 32 are located outwardly of the transverse edges 58 provides for increased flexural movement of the

arms

18 and 20 about the bend lines during the tightening of the bolts 56 thereby allowing the clamp to adjust to different-sized uprights. In the instant embodiment, for example, applicant's clamp can be used with uprights having square sections in the range of 1% inch to 2 inches.

A further advantage of applicants invention resides in tabs 17 and 19 that extend from

bend lines

21 and 23, respectively. Tab 17 extending from body 16 forms surface 23 between the body and the structure 14, with tab 19 forming a similar surface 25. THe surfaces 23 and 25 may be treated or coated to provide a reflective surface for approaching traffic. Furthermore the inclusion of tabs 17 and 19 eliminate sharp edges that would otherwise beformed along

bend lines

21 and 23.

FIG. 3 shows another application of the clamp of the present invention wherein one or more barrier sections 80 can be retained on upright members 82 to form a temporary barrica de. It will be observed that when used in this manner, the upright 82 becomes the fixed member and the barrier sections the adjustable members. However, the function of applicants clamp in retaining the

member

80 and 82 firmly in position in relation to each other remains the same as described above.

We claim:

1. A structural member of elongated form, having outer longitudinal corrugations and parallel longitudinal edges, in combination with a fastening device for securing together a trans verse member and the structural member, said fastening device comprising:

a body having a pair of interconnected flexible arms with free extremities remote from their junction, said arms extending outwardly from the ends of said body to form a recess for receiving the structural member;

said extremities being formed with registering apertures having an inner edge portion and an outer edge portion adapted to slidably receive therethrough a transverse member;

a tab extending angularly outwardly from said body toward said structural member to form a surface between said body and said structural member; and

pressure means located on said body adjacent each said arm junction for the complemental engagement of each said longitudinal corrugation for urging said inner edge and said outer edge portions in opposite directions along said transverse member and said inner edge portions of said apertures and said parallel longitudinal edges in a direction toward one another to thus clamp said transverse member between said inner and said outer edge portion of said extremities and between said outer edge portion and said longitudinal edge and against said structural member.

2. The combination of claim 1, wherein each said pressure means is adapted to engage said structural member adjacent to and outwardly from the apex portion of its associated longitudinal corrugation to thereby urge said extremities toward each other.

3. THe combination of claim 2, wherein a pair of bend lines being at each said junction providing an elbow formed out of the planes of said adjoining body and arm, and said pressure means extending from each elbow so that the pressure on said corrugation is directed on a line inclined toward the axis of symmetry of said device.

4. The combination of claim 1, and including light-reflective means on said tab.

5. An adjustable clamp assembly for mounting an upright on a structural member, said device comprising:

a clamp having a body portion and a pair of interconnected arms with free extremities remote from their junction, said arms extending angularly outwardly from the ends of said body to form a recess for receiving the structural member;

said extremities having aligned apertures slidably receiving therethrough a tubular sleeve having therein a plurality of pairs of diametrically opposed longitudinally spaced perforations;

an elongated upright having one end thereof slidably located in said sleeve having means selectively engageable in a pair of the perforations;

a tab extending angularly outward from said body toward the structural member to form a surface between said body and the structural member; and

opposite pressure means located on said body adjacent each said arm junction for exerting pressure between said clamp and said structural member in a direction of convergency whereby said sleeve is retained on said structural member.

6. The combination as defined in claim 5, and including light-reflective means on said tab.

Claims

1. A structural member of elongated form, having outer longitudinal corrugations and parallel longitudinal edges, in combination with a fastening device for securing together a transverse member and the structural member, said fastening device comprising: a body having a pair of interconnected flexible arms with free extremities remote from their junction, said arms extending outwardly from the ends of said body to form a recess for receiving the structural member; said extremities being formed with registering apertures having an inner edge portion and an outer edge portion adapted to slidably receive therethrough a transverse member; a tab extending angularly outwardly from said body toward said structural member to form a surface between said body and said structural member; and pressure means located on said body adjacent each said arm junction for the complemental engagement of each said longitudinal corrugation for urging said inner edge and said outer edge portions in opposite directions along said transverse member and said inner edge portions of said apertures and said parallel longitudinal edges in a direction toward one another to thus clamp said transverse member between said inner and said outer edge portion of said extremities and between said outer edge portion and said longitudinal edge and against said structural member.

5. An adjustable clamp assembly for mounting an upright on a structural member, said device comprising: a clamp having a body portion and a pair of interconnected arms with free extremities remote from their junction, said arms extending angularly outwardly from the ends of said body to form a recess for receiving the structural member; said extremities having aligned apertures slidably receiving therethrough a tubular sleeve having therein a plurality of pairs of diametrically opposed longiTudinally spaced perforations; an elongated upright having one end thereof slidably located in said sleeve having means selectively engageable in a pair of the perforations; a tab extending angularly outward from said body toward the structural member to form a surface between said body and the structural member; and opposite pressure means located on said body adjacent each said arm junction for exerting pressure between said clamp and said structural member in a direction of convergency whereby said sleeve is retained on said structural member.