US1620501A - Concrete-reenforcing-rod chair - Google Patents

Description

March 8, 1927 1,620,501

R. .VOGEL CONCRETE REENFORCING ROD CHAIR Filed Spt. 15 1926 (16301 we 14E? li ateiited Mar. ti, llQZi.

BEINHQLD VOGEL, 013 SOUTH WILTQN, CONNECTICUT.

CONCRETE-BEEN ?ORCING-I'LUD CHAIR.

Application filed September 15, 1926. Serial No. 135,525.

side wall and surfaces of the concrete and At the presalso with respect to each other.

cut time a common way to support them during the pouring" operation is by means of wooden chairs or frames or chairs made of heavy wire to which they are wired by wrapping a smaller wire about the support and the rods. These constructions are not satisfactory because it requires considerable labor to wire the reenforcing rods to the sup orts, that they will not shiftoutof position during;

the pouring and tamping of the concrete. It is, therefore, an object of my invention to provide a chair or support for the. reenforcing rods which will securely hold them in the roper position without the necessity of wirfill ing the rods to the supports, or if such wiring is found desirable it will be greatly simplltied, and also to provide a support which may be manufactured at low cost, will accu rately position the reenforcing rods, and will 3 prevent their shifting out of position during the laying of the concrete.

With the foregoing and other objects in view, I have devised a construction of chair for supporting these reenforcing rods, the preferred form of which is illustrated inthe accompanying drawing. In this drawing,

Fig. l is a transverse section through the outer side edges of a section of concrete road showing the longitudinally extending reen forcing rods or bars and the method of supporting the sameby means of my improved support or chair.

Fig. 2 is a top plan View showing the reenforcing rods and the chairs in position,

the distance between the chairs, however, not

being to scale.

Fig. 3 is a side elevation. of the chair on a larger scale showing the reenforcing rods in position, and V Fig. i an end elevation thereof looking from the ri ht of his. 3.

and also it is difficult to so wire them The concrete is represented. by the numeral 5, and as is well known it is laid between suitable forms while wetand held thereby until it has sufficiently hardened or set. The side members of this form are indicated at (i. The outer side portions of the I concrete road are reenforced by longitudinally extending steel rods or bars and these rods mustbe accurately located according to specifications. In the drawing these rods or bars are indicated at 7 8 and 9, the common construction calling for three of these rods, the lower rod 7 and upper rod 8 bein located about four inches inwardly from the edge of the concrete and they are vertically spaced about four inches from each other, looming about two inches between the upper rod and the surface of the, concrete and the same dis tance between the lower rod and thebottom I of the concrete. The other upper rod 9 is spaced inwardly about six inches from the rod 8 and in substantiallythe same plane.

In laying the concrete these/rods must be very accurately located to secure the desired results, and heretofore considerable difliculty has been experienced in economically securing them in the right positions and holding them there during the operation of laying the concrete. Common forms of support are wooden chairs or bent wires to which the rods are secured by wrapping a wire around them, but these are not satisfactory as the wires slip and the wiring requires considerable manual labor as there are a lar e munber of these chairs used. Generally t ey are placed about two and one-half feet apart. With my construction of chair, however, the reenforcing rods are properly supported Without the necessity of any wiring operation, and they are firmly held in the proper relative positions during the laying of the concrete. These chalrs are. made of a sin-.

gle piece of relatively heavy wire or small rod bent substantially to the shape shown in the drawing. The rod is bent laterally in the same direction at two points 10 and 11 spaced a proper distance from each other to form a horizontally extending upper portion 12 and two uprights 13 and 14 at the opposite ends thereof. The top member is also bent or offset downwardly at 15 and 16 adjacent the bends 10 and 11 to form substan tially ll-shaped loops which provide seats for the rods 8 and 9, and, of course, these downwardly extending" seats or oifsets are so located as to give the proper distance between:

the rods 8 and 9. The upright member 15 is inclined inwardly somewhat from the bend and is bent or wound to form an eye or loop 17 the required distance below the offset 15, and the inward incline of the upper upright brings this loop in substantially the same plane as the rod 8. It is preferred to make this loop as one continuous convolution which will wrap entirely around the rod 7, as it is easier to make and will also firmly hold this rod against lateral movement in any direction. The side member extends downwardly from this loop and is then bent outwardly, as shown at 18, to form a horizontal iortion 19, preferably extending in substantially the plane of the chair, and

at its outer end it is bent laterally to form a foot 20. The foot 20' is located a distance outwardly "of the loop 17 so that when the chair is placed with this foot against the inner wall of the side member 6 of the form the loop 17 and the offsets and 18 which clinedinwardly somewhat but at its lower.

end is bent laterall at 21 in the opposite direction from the diet and then. upon itself at 22 to form a portion extending in the opposite direction and of sufficient length to extend beyond the plane of the chair on the same side as. the foot 20. These feet, therefore, provide lateral supports for the chair on both sides of the plane of the chair.

in placina the reentorcement in osition the require number, of chairs are t readed onto the rod 7 by inserting this rod, through the eye iii, The chairs are then placed with the foot 26 against the inner wall oi the side the frame 6 at the proper distances apart. The upper rods 8 and 9 are then merely placed in the ofl'sets To and 16, It will be obvious that the chairs will securely hold all threeof these reenforcing rods in proper relation to each otherand also'the surfaces of the concrete. A. downward pressure on the top portion 12 will more firmly clamp the rod 2. It will also apparent that the operation of locating the chairs and placing reen'forcing rodstherein is very simple one which be quickly and easily performed The rod '2 is gripped by the walls of the loop 1'? and firmly held against lateral movement in any direction and. there is very little danger of either of therods 8 and 9 being shifted out of their seats. Should, however, ll; be found desirable to positively hold them in these seats this maybe done by means of a piece of Wire or rod'Qll, which, as shown in Fig. 3, may be extended across and laid on the top of the rods 8 9 and. its opposite ends merely laterally and s)" need through the loops iormedby the bends it) and .il. It will be seen that will firmly hold the rods 8 and 9, in their loops and prevent upward movement or displacement of these rods. In order to prevent spreading of the supportin;; side members 13 and let under the weight of the rods and concrete 1 may connect them at their lower portions by means of a tie rod 25, which is a piece of wire or rod similar to or the same as the stockused for the chair'and atits opposite ends bent into an eye around the members 13 and 14.

Having thus set forth the nature of my invention, What 1 claim is:

l. A chair for supporting rcenforcing rods comprising upright side members one of which is provided with a loop to support a transversely extendingrccnl'orcing rod, a top member comm-ting the side members and provided with spaced downwardly eurvcdpol'tions to form seats for reenforciug rods, and laterally extending feet at the lower ends of the side members.

2. A chair for supporting reen'forcing rods comprising a rod bent to form a horizontal top member and upright side members, one of said side members being bent into a loop to embrace a recni'orcing rod and the top member being provided with spaced downwardly extendii'ig bends to form seats for reeniforcing rods, and the lower ends of the side members being bent laterally to form feet.

A chair for supporting rcenforcing rods conmrising, a rod bent at spaced points to form a horizontal top portion and upright side portions, one 0'! said side portions being provided with a loop to embrace a transversely extending reeni'orcing rod, the top member being bent tilou'nwardly to form a seat for a reentorcing rod, and one of the side members being bent laterally at its lower end to form a toot to hold the chair upright.

A chair for supporting reen'forciug rods comprising a rod or relatively heavy wire bent to substantially inverted U-sbupc to provide a horizontal upper nu-mber and upright side members, said upper nu-mb-t-r being provided with spaced downwardly oil'- set bends to provide seats l'or transversely extending reenforcing rods and similar inverted bends adjacent the first bends, and a wire or rod extending across over the transverse rods and extending into and held by said inverted. bends,

5. A chair i'or supporting reenforcing rods comprising a rod or relatively heavy wire bent to substantially inverted U-shape to provide a horizontal upper member and up 'iglitside members, one of said side mem hers being bent into a loop to embrace a transversely extending reeniorcing rod and having a horizontally extending foot at its lower end, said upper member being provided with spaced downwardly offset bends to provide seats for transversely extending Hill ' direction at-spaced points to provide a hori reenforeing rods and similar inverted bends adjacent the first bends to hold a transverse wire or red extending across over the trans verse rods.

6. A chair for supporting reenforeing,

rods comprising a rod bent in the same .upright portions being bent into a loop to embrace a reenforcing .rodand extending outwardly below the loop in the plane of the chair and then laterally to form a foot at its lower end, the other upright. portion being bent laterally at its lower end and back- 'wardly upon itself in the oppositediretion to form a foot.

7. A chair for supporting reenforcing rods comprising a rod bent to substantially inverted U-shape with the upper part provided with seats for IGGIlfOlCll'lg rods and one of the side members provided with a seat for. a similar. rod, laterally extending feet at the lower ends of the side members,

and a tie rod connecting the side members adjacent their lower ends.

In testinlony whereof I affix my signa tnre.

REINHOLD VOGEL.

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