US1848476A - Adjustable shoring - Google Patents

Description

A. HALL ADJUSTABLE SHORING Filed March 26, 1930 2 Sheets-'Sheet l March 8, 1932. A. HALL ADJUSTABLE saoxuns 2 Sheets-Sheet 2 Filed March 26, 1930 Patented Mar. 8, 1932 PATENT OFFICE v ALFRED HALL, OF CHICAGO, ILLINOIS ADJUSTABLE SHORING Application filed March 26, 1930. Serial No. 438,931.

My invention relates to .improvements'in adjustable shoring for supporting temporary form work for concrete construction.

One of the principal objects of my invention is to provide shoring adaptable to being connected with the stringersy and base supporting planks While the shoring is still lying on the ground, thus insuring form work accurately positioned and easily set up7 with a minimum expenditure of time and equipment.

Another obj ect of my invention is the provision of an improved shore that may be ifo easily and quickly moved to approximately the desired length and then accurately adjusted by a screw thread adjustment to the actual desired length.

A further object of my invention is to provide a telescoping adjustable shore having improved interlocking means for .connecting the telescoping parts to form a rigid structure'.

A further object of my invention is to provide an improved shore having visible means sired length thereof. Y A further object ofthe invention is the provision of improved means for quickly and easilydisconnecting the interengaging parts of the telescoping members of a shore to remove the shoring in a minimum amount of time. y y .v y

Qther objects and advantages will be more Vapparent from .the following description, reference being had toA the drawings, in which Y, y u i `Fig. 1l is a. side elevational view of the shoring in'Y position for supporting temporary thereon for determining the approximate deform work for concrete construction;

' Fig. 2 is al fragmentary end view and partial section of the parts shown in Fig. 1;

Fig. 3 is an enlarged vertical sectionalview of my improved shore;

Fig. 4 is a plan sectional view taken on the line 4 4 of Fig.. 3; yFig. 5 is a similar view taken 5 5 of Fig. 3; l l

Fig. 6 is also a plan sectional view taken on the line 6 6 of Fig. 3;

Fig. 7 is a plan sectional view of the interon the line locking means and is taken on line 7 7 of Fig. 3; and

F ig. 8 is a plan sectional View of one of the telescoping members taken on the line 8 8 of Fig. 3 and showing the base member in elevation.

Referring to Figs. 1 and 2, 10 indicates in its entirety my adjustable shore which is shown supporting stringers 12 and attached to the customary supporting plank 14 by means of base members 16.

The adjustable shore comprises a pair of extensible or telescoping members 18 and 20, one of which is slidably received within the other. The lower member 18 is preferably of a T cross-section, having a medial iange 22 provided with a. plurality of notches or teeth 24 for a purpose to be hereinafter described.

Member 18 is mounted in a base or foot 16, being ixedly secured thereto by means of a pair of bolts 28 which pass through suitable apertures in flange 22. Base member 16 is provided with strengthening ribs 30 and is fastened to supporting plank 14 by a plu` rality of fastening means such as the nails 32. A square plate 82 is fastened to the top of member 18 as a guide. member in sliding up and down in member 20.

Upper member 20 is preferably of a squared tubular cross-section and has xedly secured thereto at its lower end a collar 84. Collar 34 may be of cast iron and has a lower flange 36 having an opening 37 therein through which lower member 18 may freely pass. The lower edge of the upper member 2O rests upon a shoulder 38 on flange 36. A ring member 40 is rotatably supported upon an external shoulder 42 of collar 34 and has its lower end threaded as at 44 to engage the upper end of an operating nut 46. In as semblina' the above-described unit, ring member 40 is lowered from above, into engage ment With collar 34 until the inturned flange thereof rests upon shoulder 42. Operating nut 46 is brought up from below and thread ed into ring 40 until only sufficient space is left between the upper surface of nut 46 and the lower surface of collar 34 to provide a running ft between them. Lock screws 48 fr are provided tov fasten ring and nut 46 together in this position, allowing them torotate freely on collar 84.

Operating nut 46 is internally threaded, having in the embodiment shown a typical jack-screw or square thread engaging a complementary inner. sleeve or `bolt portion 50. The bolt portion 50 has a vertical T-shaped opening 52`therein through which lower member 18 passes.

A tapered slot 54 extendsfromapointnear the'outer edge of bolt 50 into the opening 52 and a dog or tooth engaging member^56 provided with a similarly tapered upper surj face is shown engaging one of t'heznotches 24.`

Tootlrengaging member 56 may be of a hardened steel' material having a pair of shoul dersV 5 8 which engage-either .sideofl flange 22 to ,position the member56l and prevent accidentalv displacement thereof. AMember 56,

maybeV attached to bolt Y by a chain 60 to prevent itsaccidentalloss when not in use.

rlhe upper end ofmember 20 ispositioned'in afiangedsocket 62 of a head member 64 which is attached to stringers12 by means of nails 65; Member 2O"may-be.rigidly secured to the head member 64'by rivets 66. Head member 64' is provided 4with aV pair of upturned sidewalls 68 and 7.0. Side wall 68 is formed with a row of prongs or teeth 72 adapted to press' into a Stringer 12'when the head member. is attached thereto. Thestringers are further` fastened to the head member. by means of'cut nails 74driven down along the side of the stringere, entering the wood. slightly andy passing through nail holes 76 in member 64. With. the arrangement'provided it is a comparati'vely simple matter to detach the head member 64 from the Stringer. The nails 65 are withdrawn,the nails 74' are driven or knocked out by blows from below, the head member is moved to the` left (Figli)l and the Stringer is freed from the prongs 72.

The preferred embodiment of my invention contemplates a shore adaptable to use in build# Ving most ofthe concrete construction work use in present day buildings, Shoring for this type of work requires a minimum height of k7"'--6""and a maximum height of.14-O

` yTe-ompensat@ OT'hS: Upper` member 2mg of such a. lengthso that when dog 5.6 seng'aged in lower 'tooth 240i` lower member '18 the 'shore has'an approximate working length of 6- 6v;andalso to provide visible indiciaof '1- the height ofthe shore, the lower member 1.8 has av scale 80'k marked along a side of flange 22. Y t j The scale extends tothe uppermost tooth 24 which will give an approximate height of 14'I-O to thel shore. Itwill be understood,

.' of course, that through. the bolt and'nut connection between 52 and `46 an accurate final adJustment may be obtained. t

In using lthe shoring of the present inventionthelower member 18 ot' the individual shore is fastened to plank 14 andr the upper member 20 is fastened to stringers 12. Member 18 is then telescoped within member 20 to the desired height, dog 56 is inserted in slot 24, and members 18 and20 are telescoped together until the tapered wall of dog 56 rests againstthe-slot 54 in nut 5 0. All this isV donevwhilelin a horizontal position on the ground. vThe assembly is now raised to a verticalv position in the desired locationV and innecessary .ai finaladjustment is made to the actual height desired by means of bolt 52 andnut 56:

The eXtreme simplicity of operation of the present shore'will'readily be apparent in contrast to .the complicated devices ofthe prior art. .It should also Vbenoted that no.v other length of, the shore.

Having thus described Vmy. invention, what` I claimfand desire to secure by United States Letters Patent-is: Y

1` An adjustable'shore includingV apair of telescoping members, one of said members be.

ing of'a T cross-section, a foot portion rigidly secured tothe lower end of said member, a

plurality of regularly spaced'stop engaging portions on the webof said member, ya visible scale positioned onthe side of said web, the otherofsaid members being of al square tubular cross-section, a header unit secured to the upper'end of saidA member, a Ycollar attached to the lower end'of saidlmember, an' adjusting nut rotatably secured below [said Y collar., means for interconnecting said first and second' mentioned telescoping members includinga tooth engaging member, and an internal collar within said adjusting nut member. adaptedto cooperate with said tooth engaging portion to rigidly support -said telescop` ing members in an extended position.v

2. An adjustable shore comprising a pair of telescoping members, a threaded collar freely rotatable on one member, a threaded element slidably and non-.rotatably mounted on the other member, said threaded element operatively engaging the'threaded collargand s means for Vpreventing longitudinalY movement of saidelementupon the last said member.

3. An Vadjustable shore comprising a pair of telesconing members, an linternally threaded collar freely rotatable on'A one member, an eXv along its length, and the slidable elementbeing provided with a recessr adapted tobe .brought adiacent the notches, andv agdog adapted to be located in said recess-and one of said notches to maintain thefmembers.; in desiredrelation., Y

4. Anadjustable shore comprising anouter and an inner telescoping member, means adapted to be rigidly mounted on the inner member in adjustable positions, means mounted on the outer member having a threaded engagement with the rst said means.

5. An adjustable shore comprising a pair of telescoping members, the inner telescoping member being of T cross section, the outer anV internally threaded collar freely rotatably mounted on the inner endV of the outer telescoping member, an exteriorly threaded element slidably and non-rotatably mounted on the inner telescoping member, said collar and element being adapted to be brought into threaded connection, said element being provided with a recess adjacent the edge of the notched web of the inner telescoping member, and a dog adapted to be located in the recess and in one of the notches to adjust the shore roughly to desired length, tine adjustment being provided by relative rotation between the collar and threaded element.

In witness whereof, I hereunto vsubscribe my name this 20th day of March, 1930.

ALFRED HALL.

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