US2403842A - Anchor for gratings - Google Patents

Description

July 9, 1946' Q w. A. BATES 2,403,842

ANCHOR FOR GRAT'INGS Filed March 3, 1944 IN V EN TOR.

Patented 'July 9, i946 ,1 I Jpn-alarms A isclainis." 1 n;

- w The present invention relates to T improvements in anchors for'jgr atings g g Gratings su h' usedin floors and stairsteps ini1idustrial plants commonly have their edge portions supported by shelf-like, projections se-' .cured'to the structure of thebuilding. Various expedients have. been used for fastening the rat :ings -tosu ch supports, but all of those with which appli ant is familiar have presented diiliculties [from a practical standpoint. I

ananchor for gratings which is'simple in construction, easy to apply and efiective in service. -A'; further object is torprovide an. anchoflfor gratings which is simpleand-chea and yet possesses the necessary strength to'perform its functions; f

-A-further object-is toprovide 'a grating anchor which may be readily mountedi-inplace from andsition above the grating which maybe readily-removed from operative position when desiredfbut is not at all likely to-come l6ose.-in service.' i '-A further object isto provide an improved grating construction and anchor .thereforwell' adapted to meet the needs of commercial service. Further objects will appear asthe description proceeds.

Referring to the drawing:

; Figure l-isa fragmentarytop p1anview;showing part or a grating having applied thereto an anchor embodying :the principles of'the present invention';-'-- -f I 1 Figure 2 is :a'sectional view taken along the plane-indicated by-the arrows 2-2 of Figure 1 71 Figure 3'is an' end view. takenin the direction of the arrows 33 of- Figure 1; n

Figure 4 is a sectional view taken along the plane indicated by the arrows 4-4 of Figure 2 -Figure 5 is a view similar to Figure l but illustrating the applicability of an anchor embodying the present invention of one size to a grating the main bars of which are spaced closer tog ther thanare the main bars of the grating illustrated in figure 7 e w ,A.. Figure 6 is a top 'plan View of a i'nain baro f "a grating showing a modification of an 'anchpf'e'ngaging lug struck out'fror'n saidmain bar i Figure '7 is asection'al'view" taken along the plane jindic'atedbythe arr'ows I -I ofFigure 6': I

Figure-8 is a top plan-view oi am'ain' bar of'ia grating showing a further modification o'f an-butstruck lug for'engaging an anchor according to thepresentinvention; and K Figure 9 is} a SGCtlOl'iaPVlGW taken alon g the 1 p n 65 the adjacent portion of the leg l6 of the anchor plane indicated by the arrows 9-9 of Figure 8.

1 U TE STATES PATENT orr ca; I, .2. ;If 7 i j: v .7 M i. afiiirioltroa GRATINGS wand AiB5tBSiJi0lihLIlls us si g norto Beulah H.

" B t aJouegnt n I .3, mag-s as 52435 ff (crass-84$ "-An ject oithe presentinvention is to provide 45 inch -or a little less;

. In thefgrating 'lllust'atddri thdr'awiilgi the numerals Ill' l0 indicate nainlbarsgwhicm as shown in FiguresB and 4; are of general rectan larv cross'section. Said bars are disposedinfparallelrelationship' with ejachbther and their- 111)- per edges are recessed for therejcepti'on offlcrdss bars ll. Said 'crossbars H are secured tojth'e main bars 0- -lllpreferab1y by means' of welding, the welding depositbeing indicated; by the' im- 10 meral I2. Th edg'e portionsfof the'igrateare commonly supported byshlf like structures. 3 p

Figure 2 illustrates in cross section an angle bar, indicated by the numeral I 3, 'suitableior this purpose. Asshownin Figures 'l and -2, the adjacent ends of the parallel main bars l 0.-I0 rest upon the horizontally extending' flange of an angle bar l3. The present invention provides means for fas tening said mainbars Ill-H ll to -said angle bars [3 whereby said mainbarswillb securely held'down.

1 According to-the present;;invent ion,- two (adjacentmain bars Ill-l0 are provided-with lugs I lll extending from-adjacent sides thereof- It a res re e ed to s r these u s fr the material of the main bars Ii) i 0, sai d lugs lie-i in ere in. n i ver lationship with their corresponding main; bars 1 il l 0; I Assuming a grating havinga substantiallyhorizontalupper surface, the upper surfaces of the lugs -Hk-M will disposed at an-angle of about 30 degrees from a horizontalplane. A Said lugs"l l ;l lserve as abutment 'means foragrating anchors embodying the principles of; the present invention. r w

One'of the advantages ojfjthe present invention is that the anchors maybe applied by a workman located above the; grating which, is being secured in position. Another advantage is that one size of-anchor will operate efliciently for grating hav- I 0 ing difierent spacings-between the main bars. A

standard spacing between-the main bars common in commercial gratingsis about (me-inch. -Another standard spacing between the main bars of commercial gratings is about'three-fourths of an ;--The -anchor for cooperating'with" the; lugs HIT- I I of the'main bars i 9'-l 0 is indicatedby the numeral |5.; Said-anchor lfi is "a channel meniber1bent into-substantial U -shape, havin the two legs 16 and l'L- The legs. i6 and ll may-he prqvidedwith-slots l 8 and; l 9; respectively. Disposed within; the slots l8 and I9 is the-bolt; 20.hav i ng the head :portion 21 provided with the scre w driver slpt '22, Disposed between the head j i an d I is the washer 23 having a portion 24 adapted to be turned up against a fiat portion of the head 2|. Said head 2| is illustrated as being of hexagonal contour, this being a convenient shape for providing a flat side portion for cooperation with the turned up portion 24. The lower extremity of the bolt 29 is provided with the nut 25 which is located within the channel of the leg I1. Said channel receives said nut 25 with sufficient closeness so that turning of said nut in said channel is prevented. The lower extremity of the bolt 20 may be upset (as indicated by the numeral 25) after said bolt and nut 25 have been ,ssemloled in the anchor I5.

The outer extremity of the-leg- {IE is swedged workman can easily bend one or both of the tips 28 or 29 without danger of pushing the anchor away from the lugs. After the bolt 20 has been tightened to the desired degree, the edge portion 24 of the washer will be turned up against a flat face of the head 2| of said bolt 20, whereby to to provide a middle portion 21 and two tips -2- 8 and 29. a A dle portion 21 will be raised slightly above-the adjacent bottom of the channel forming the leg I6 to provide more or less rounded shoulders 30 -30 adapted to abut against the lugs I4 -I4. The material of the anchor I5 is bendable, and eitherjor both of the tip 28 or 29, each having been severed from the mid portion 21 in the swedging operation, may be bent down over one During the swedging operation the midor both of the lugs I 4'I4 to hold the anchor 1 against movement toward the left as the parts are viewed in Figures 1, 2 and 5.

Figures 6 and '7 illustrate a modification in theform of a lug for cooperation with the anchor I5. of each of the two adjacent main bars Ill-I0 issevered along one plane, indicated by the section line 'I-'I in Figure 6, the adjacent metal being swedged to form an angularly projecting lug 3| adapted to form an abutment functioning similarly to the correspondin'g'abutment I4 illustrated in Figures 1 to 5.

Figures 8 and 9 illustrate another modification, in which the lower edges of the two adjacent main bars II] have portions swedged toward each other in the form of bulges, as indicated by the numeral 32. Said bulges 32 operate as lugs similarly tothe functions of the lugs I4I4 illustrated in Figures 1 to 5 and the lug 3I illustrated in Figures 6 and '7.

In practice the dimensions of the horizontally projecting portion of the angle member I3' will vary. However, the anchor I5 will be sufiiciently bendable and the length of the bolt'2! will be such as to accommodate the variations in the dimensions of the angle member I3that are en'- cou nter'ed in practice. Furthermore, by reason of the slots I8 and I9 in the legs I6 a'nd'II the bolt 20 may be moved back and forth. Th'e'bolt 20, washer 23a'nd nut25 will be mounted in assembled relationship with the legs I6 and I1 and the extremity of the bolt 2!] will be upset, preferably at the factory. At this time the edge portion of the washer 40 will be fiat and both tips 28 and 29 will extend in generally parallel relationship with the'mid portion 21 of the swedged end of the leg I6.

In mounting the anchors, the workman'willbe located above the top of the grating} The bolt 20 will be loosened to a sufficient extent so that As shown in said figures the lower portionprevent accidental turning of said bolt. L. The anchor I5, being channel-shaped in cross section, will have requisite strength without sacrificingth'e factor of ready bendability of the tips tween main bars is about three-fourths of an inch or a little less. The maximum spacing may be in the neighborhood of one inch. It is not necessary to stock more than one size of anchor to cover these differences in spacing between the main bars. In other words, an anchor having a maximum width of a little less than threefourths of an inch will serve for the limits of spacing referred to. The angularity of the swedged in lugs I 4I 4 or theswedg ed in lugs 3I3I or the swedgedin lugs 3232 will insure the symmetrical spacing of the anchors between the main bars.

By reason of the fact that one or both of the tips 28 or 29 is turned down over a lug of a main bar, there is no danger that the anchor will drop oif into the region below the grating. Therefore, even if the bolt'20 should becom loose there is no danger that the'anchor would be lost.

Though a preferredembodiment of the present invention has been described in detailjmany modifications will occur to'those skilled in the art. It is intended to cover all such modifications that fall within the scope of the appended claims.

What is claimed isr 1. A grating having parallel main bars and cross bars secured together, adjacent main bars having lugs swedged therefrom atregions' adjacent to the bottoms thereof and spaced from said cross bars,- said lugs being 'presented'tow'a'rd each other and providing upper surfaces sloping downwardly to the region between said bars.

2. A grating having parallel main bars and cross bars secured together, adjacent main bars having lugs swedged therefrom at regions adacent to the bottoms thereof and spaced from sald cross bars, said lugs being presented toward each other and providing upper surfaces sloping downwardly to the region between said bars, the angle of slope of said surfaces to the horizontal being approximately thirty degrees. 1

3. An anchor for securing a grating to a support comprising a U-shaped member of channel conformation providing two legs, one of said legs having a bendable tip, a bolt extending through said legs, the head of said bolt having a nonround portion, a washer underlying said head and being non-turnable with reference to said anchor, said head and said washer being disposed within the channel conformation of one 'of said legs, and a nut located in the channel conforma tion of the other of said legs, said nut being nont'urnable with respect to said other leg, said washer having a portion adapted to be turned up against the flat portion of said'head to prevent relative rotation therebetween.

4. An anchor for securing a grating to a, support comprising a U-shaped member of channel conformation providing two legs, one of said legs having a bendable tip, a bolt extending through said legs, the head of said bolt having a nonround portion, a washer underlyin said head and being non-turnable with reference to said anchor, said head and said washer being disposed Within the channel conformation of one of said legs, and a nut located in the channel con-formation of the other of said legs, said nut being nonturnable with respect to said other leg, said washer having a portion adapted to be turned up against the fiat portion of said head to prevent relative rotation therebetween, the end of said bolt being upset whereby to prevent it from becoming disengaged from said nut.

5. In combination, a grating having parallel main bars secured together, adjacent bars having lugs swedged therefrom presented toward each other, a support for said grating located under an edge portion thereof, and a U-shaped clamp embracing said support and said lugs.

6. In combination, a grating having parallel main bars secured together, adjacent bars having lugs swedged therefrom presented toward each other, a support for said grating located under an edge portion thereof, a U-shaped' clamp embracing said support and said lugs, a bolt extending through the legs of said U-shaped clamp, and a nut on said bolt for holding said clamp in clamping position.

'7. In combination, a grating having parallel the legs of said U-shaped member having a bendable tip at its extremity, a bolt extending through the legs of said U-shaped member, a washer underlying the head of said bolt and being nonrotatable with respect to said anchor, said washer having a portion adapted to be turned up against the head of said bolt to prevent relative rotation between said washer and said bolt, and a nut located in the channel conformation of one of the legs of said U-shaped member, said nut being non-rotatable with respect to said U-shaped member, the head of said bolt having a screw driver slot therein, the end of said bolt being upset whereby to prevent it from becoming disengaged from said nut.

10. In combination, a grating having parallel main bars secured together, adjacent bars having lugs swedged therefrom presented toward each other, a support for said grating. located under an edge portion thereof, and a U-shaped clamp embracing said support and said lugs, said clamp having a bendable tip adapted to be bent down over one of said lugs.

11. In combination, a grating having parallel main bars secured together, adjacent bars having lugs swedged therefrom presented toward each other, a support for said grating located under an edge portion thereof, and a U-shaped clamp embracing said support and said lugs, said clamp having a bendable tip adapted to be bentdown main bars secured together, adjacent bars having mainbars secured together, adjacent bars having lugs swedged therefrom presented toward each other, asupport for said grating located under an edge portion thereof, a U-shaped clamp embracing said support and said lugs, a bolt extending through the legs of said U-shaped clamp, a nut on said bolt for holding said clamp in clamping position, and a washer underlying the head of said bolt, said washer being non-rotatably mounted with respect to said clamp and adapted to havea portion thereof turned up to prevent relative rotation between said bolt and said washer.

8. In an anchor, in combination, a U-shaped clamping member of channel conformation, one of the legs of said U-shaped member having a bendable'tip at its extremity, a bolt extending through the legs of said U-shaped member, a washer underlying the head of said bolt and being nonrotatable with respect to said anchor, said washer having a portion adapted to be turned up against the head. of said bolt to prevent relative rotation betweensaid washer and said bolt, and a nut located in the channel conformation of one of the legs of said U-shaped member, saidnut being lugs swedged therefrom presented toward each other, a support for said grating located under an edge portion thereof, a U-shaped clamp embracing said support and said lugs, said clamp having a bendable tip adapted to be bent down over One of said lugs, a bolt extending through non-rotatable with respect to said U-shaped 7 the legs of said U-shaped clamp, and a nut on said bolt for holding said clamp in clamping position, said nut being non-rotatable with respect t said clamp.

13. In combination, a grating having parallel main bars secured together, adjacent bars having lugs swedged therefrom presented toward each other, a support for said grating located under an edge portion thereof, a U-shaped clamp embracing said support and said lugs, said clamp having a bendable tip adapted to be bent down over one of said lugs, a bolt extending through the legs of said U-shaped clamp, a nut on said bolt for holding said clamp in clamping position, said nut being non-rotatable with respect to said clamp, and a washer underlying the head of said bolt, said head having a flat side portion, said washer being non-rotatably mounted with respect to said clamp and adapted to have a portion thereof turned up against said flat side portion to prevent relative rotation between said bolt and said washer.

WALTER A. BATES.

Images