US3190405A

US3190405A - Extendable shore

Info

Publication number: US3190405A
Application number: US120985A
Authority: US
Inventors: Robert K Squire
Original assignee: SUPERIOR SCAFFOLD CO
Current assignee: STEEPLEJACK WACO (CLEVELAND) Inc A CORP OF; SUPERIOR SCAFFOLD CO
Priority date: 1961-06-30
Filing date: 1961-06-30
Publication date: 1965-06-22
Anticipated expiration: 1982-06-22

Description

June 22, 1965 R. K. SQUIRE 3,190,405

EXTENDABLE SHORE Filed June 50, 1961 2 Sheets-Sheet 1 SI!HI!!!llllllllllllllllllilllll INVENTOR. 2055:7764 540/35 BY g firing/taxi June 22, 1965 R. K. squmz 3,

EXTENDABLE snonm Filed June 30. 1961 2 Sheets-Sheet 2' INV EN TOR. 05.50 16 52 0/25 Arne/14ers United States Patent Office 3,190,405 Patented June 22, 1965 3,190,405 EXTENDABLE SHORE Robert K. Squire, Los Angeles, Calif assignor to Superior Scaffold C0., Torrance, Calif, a corporation of California Filed June 30, 1961, Ser. No. 120,985 8 Claims. (Cl. 18913) The present invention relates to extendable shores or shoring scaffolds for adjustably supporting a load.

A weakness of known extendable shores or shoring scafof the shoring scaffold progressively decreased as the shore was extended. According to the present invention, cross bracing is installed between the extension frames and the base frames of the shoring scaffold, with the connection of the braces to the base frames being effected through adapter pins adjustably mounted in the base frames and carrying the weight of the extension frames and the load supported by the shoring scaffold. This construction serves to rigidify the shoring scaffold and to increase the load bearing capacity thereof in extended position, While at the same time providing for faster setups and lower labor costs. Further, the scaffold or shoring height i's-variable over a wide range while using only two types of end frames comprising two basic units, a base frame and an extension frame. The base frames are usable in any desired number in superposed relation and with an extension frame forming the top unit in order to secure the necessary scaffold or shoring height.

It is, therefore, an object of the present invention to provide an improved extendable shore or shoring scaffold.

Another object of this invention is the provision of an improved extendable shoring scaffold having increased rigidity and load bearing capacity.

A further object of this invention is the provision of an extendable shoring scaffold which may be set up and effectively braced in a minimum of time.

A still further object of this invention is the provision of an improved extendable shore or shoring scaffold employing base and extension frames with telescoping legs and an adapter pin mounted in and adjustable vertically of the base frame and carrying the weight of the extension frame plus the supported load, in which the adapter pin acts as a brace point for rigidifying cross braces connected between the extension and base frames.

These and other objects and features of this invention will be readily apparent to those skilled in the art from the following specification and the appended drawings, in which:

FIGURE 1 is a perspective view of the shore or shoring scaffold according to the present invention;

FIGURE 2 is a detail sectional view of a screw jack used with the shoring scaffold of FIGURE 1;

FIGURE 3 is a detail view of the junction between two base frames of the scaffold, broken away to show the coupling pin therebetween;

FIGURE 3:: is a detail sectional view on the line 3a of FIGURE 3;

FIGURE 4 is a perspective view of the adapter element mounting the adapter and tie pins;

FIGURE 5 is a sectional view of the joint between the legs of the base and extension frames;

6-6 of FIGURE 5;

FIGURE 7 is a view similar to FIGURE 5 showing a modified form of extension leg mounting with the adapter pin passing therethrough; and

FiGURE 8 is a transverse sectional view, similar to FIGURE 6, but showing a modified form of adapter element in which the adapter pin and aligned tie pin are connected together and are separable from the adapter element.

The shoring scaffold 11 of FIGURE 1 is illustrated as made up of two pairs of base frames 12-13 and 14-15. Mounted in and above the base frames 12-13, with their legs telescopically interengaged, are extension frames 16- 17. Screw jacks 18 are provided at the bottom of the base frames 14-15 for leveling of the frames and the shoring scaffold, while screw jacks 19 are provided at the top of the extension frames 16-17 for fine adjustment of the head of the shoring scaffold.

The base frames 12-15 are identical in construction, each comprising a pair of horizontally spaced,

vertical legs

21 and 22 having a pair of horizontal struts 23-24 rigidly connected thereto adjacent their opposite ends, as by welding. Cross struts 25-26 are rigidly secured, as by welding, to the vertical legs 21-22 intermediate the horizontal struts 23-24, and the cross struts are welded together at their cross point 27. A horizontal rigidifying strut 28 interconnects the cross struts 25-26.

The vertical legs 21-22 are provided with spaced through holes 29 along their length for the reception of adapter pins to adjustably support the legs of an extension frame. The axes of the holes 29 are parallel to the plane of the base frame. Through holes 31 are provided adjacent the opposite ends of the legs 21-22 with the axes of the holes 31 extending at right angles to the plane of the base frame.

Two pairs of base frames are shown in FIGURE 1, and it will be readily apparent that this number may vary from one pair to any desired number of pairs of superposed base frames which may be required to reach the desired shoring height. The superposed base frames are connected together in the manner shown in FIGURES 3 and 3a of the drawings. A coupling pin 32, having a cross-shaped body portion with the width of the legs of the cross substantially equal to the interior diameter of the tubular legs 21, is received within the adjacent ends of the legs. A central disk 33, having a diameter greater than the internal diameter of the legs, properly locates the coupling pin with respect to each leg of the base frame. The ends of the coupling pin 32 are provided with holes 34 which align with the holes 31 in the legs 21 and through the

openings

31, 34 are disposed bolts 35 serving to connect the adjacent ends of the legs of the base frames together through the coupling pin 32 Each of the base frames 12-15 is provided with four tie pins 30 mounted in opposed relation adjacent the opposite ends of the legs 21-22, upon the mutually facing surfaces of the legs. The pins 30 are butt welded to the surfaces of the legs 21-22 and have transverse openings therein adjacent their ends for the reception of nails or cotter pins to hold the cross braces thereon.

For each pair of base frames 12-15 there are provided a pair of front cross braces 43 and 44 and a pair of

rear cross braces

45 and 46. The cross braces 43-46 are provided with flat end portions 47 having openings 48 therethrough in which are received the pins 30. The cross braces extend from the lower pins 30 on one frame of each pair of horizontally spaced frames to the upper pins 30 on the opposite frame of the pair.

Each of the extension frames 16-17 comprises a pair of vertical legs 36-37 joined together adjacent their upper ends by .a pair of vertically spaced

horizontal struts

38 and 39 welded at their opposite ends to the legs 36-37. Angular struts 41 and 42 interconnect the

horizontal struts

38 and 39 to strengthen the extension frames 16-17. The exterior diameter of the legs 36-37 is slightly less than the interior diameter of the legs 21-22 so that the lower ends of the legs 36-37v may be telescopically received within the upper ends of the adjacent legs 21-22 of the base frame. r

An adapter element for adjustably supporting the extension frame and its relation to the legs 36-37 and 21- 22 'is more particularly shown in FIGURES 4 through 6. The adapter elementis indicated generally at 51 as comprising an. adapter pin 52 butt welded at one end to the inner face'of the leg 53 of an L-shaped bracket 54. The adapter pin 52 has a transverse hole 55 adjacent its free end for the reception of a retaining nail or cotter pin. On the outer face of the leg 53 is butt Welded a tie pin 56. On the outer face of the base leg 57 of the L-shaped bracket 54 is butt welded a tie pin. 58, the tie pins having vertical holes adjacent their endsfor the reception of retaining nails or cotter pins.

FIGURES 5 and 6 show the adapter element 51' in position supporting the end of the leg 36. The adapter pin 52 extends through the selected hole 29 through the V tubular leg 21' of the base frame, and is retained in inserted position by a cotter pin 59 extending through the hole 55. The lower end of the leg 36 is received withinthe upper end of the leg 21 in telescoping relation," with the bottom of the leg 36 bearing against the pin 52 which thus supports the extension frames 16-17 and the load carried thereby. 1 r

The frames 16-17 are providedwith tie pins adjacent the upper ends of the

legs

36 and 37 as at761 andv 62. These pins are'butt welded to the exterior surfaces of the legs 36-37, pins 61 extending outwardly toward the front 21-22 of the frames 14-15, and the upper base frames 12-13mounted over the pins 32 and additional cross braces 43-46 applied to the base frames 12-13, thus adding a second level to the scaffolding. Bolts may be passed through

holes

31 and 34 to securely lock the upper level baserframes to the lower level frames;

The adapter elements 51 are now mounted-on the legs 21 22 of the upper level of the base frames 12-13 by inserting the adapter pins 52 through the'holes 29 at alevel selected to give the desired shoring height. The extension frames 16-17 are .now mountedion the upper base frames by inserting the legs 36-37 into the legs 21-22 of" the upper base frames, with the endsof the legs 36-37 engaging the adapterl pins 52.v Cross braces 63-66 arenow assembled to interconnectthe-tie' pins 61-on the extension frames with the tie pins 56 on the adapter elementsSl, and the cross braces 67-68 are assembled to interconnect the tie pins 62 on the extensionframes withthe tie pins 58 on the adapter elements 51. 1 Lastly, jacks 19 may be assembled by inserting their rods 76 into the upperends of the legs 36-37 and the shoring scaffold is completed. This shoring scaffold may support any desired-load thereon, a simple platform being indicated at 85 in FIGURE 1. In the modification of FIGUREV they lower ends of the legs 36-37 are provided with through holes 86 complementary to the holes 29 and'the adapter pin 52 extends meat 91 infwhich the adapter pin 92 extends freely and back of the scaffold in the plane of the frames--16-17,

and the pins 62 extending outwardly from the ends of the scaffold at right angles to the plane of the frames- 1647.

At the front of the scaffold 11 a pair of cross braces 63-64 interconnect the pins '61 on the frames 16-17,

through an opening 90through the leg 93 of the L-shaped bracket 94. 'Thetie pin 96 aligned with the adapter pin 92 has an integral head 95, to' the top of whichthe pin 92 is butt welded. The pins 92 and-96 thus form a unitary element which is separable from theL-shaped bracket 94.

and the pins 56 on the adapter elements 51. At the back I l of the vscaffold cross braces 65-66 interconnect the pins 61 on'the extension frames 16-17 and the tie pins 56 on the adapter elements 51. End cross braces 67'and 68 interconnect the pins 62 on the extension frames 16-17 with V the tie pins 58 on the adapter elements 51. By means of the-cross brace system 63-68 the extension frames 16-17 are braced with respect to the base frameslZ-IS through the adapter elements 51 and the adapter pins 52 which 97 of the L-shaped bracket 94. The construction of FIG- URE '8 functions, after assembly, the same as, the structure of FIGURE 6, but in readjusting the adapter ele ment 91 relative-to the legs 21-22 of the base frame to 'sele-ctadifferent hole 29 and'a different level of support,

the adapter elements andthe extension frames may be moved tofanother' location without removing the cross braces from the tie' pins 96' and98 Whch are separated bythe withdrawal of the pin 92 from the opening 90.

connect to the legs 21-22 of the base frames through the holes 29. It will be readily understood that the height of the extension frames 16-17 above the adjacent base frames 12-13 will be determined by the level of the holes 7 29 in which the adapter pins 52 are placed. The lower the holesselected, the greater will be the. telescoping of the complementary legs on the extension and base frames' and the lower the shoring height.

The, jacks lsand 1-9 are shown in-section in FIGURE 2 as comprising a baseplate '71, which in inverted position becomes the shoring head, having a central boss 72 21-22 and 36-37. On the rod 76 is threaded a load supporting nut 77 having operating handles 78. The bore 73 is provided with recesses 79: in which are received lugs 81 on the knob 75 to provide for limited pivotal 76. The' knob 75 is maintained within the bore 73 by a snap ring 82; I

. In setting up the shoring scaffold 11 shown in FIG- used in any desired number', and extensionframes adjustably-mounted on the upper base frames; Only a small inventory of frames and cross braces-provides full flexi- 'movement between the baseplate or head 71 and the rod 7 URE l, the baseframes 14-15 are first mounted'on the jacks 18 and interconnected by the cross braces 43-46, thus forming a self-supporting structure. The coupling pins 32. are then inserted in the upper endsof the legs bility in scaffold construction. .The shoring scaffold according to this invention is set up and-adequately braced 'ina minimum of time, and the. bracing is such as to tie the extension and adjacent base frames together in a simple and effective mannen while at the same time permittingthe. carrying of relatively heavy loads with the extension frame' in extended position." While FIGURE 1 shows but two base frames 'at'the same level,'i-t is understood that additional base framesat' the same level may 'be provided to'extend the length of the shoring scaffold, or an extended length scaffolding. may be provided by using a plurality of the independentsets shown in FIG- URE 1,"

1 gWhile certain'preferred embodiments of the invention terms of the following claims."

"Iclaim: v *1. An extendable shoring scaffold comprising: a pair of horizontally spaced base frames; bracing elements interconnecting said base frames; a pair of horizontally spaced extension frames mounted on said base frames in telescoping relation; adapter pins adjustably mounted in said base frames and engaged by said extension frames to support the extension frames and the load carried thereby; and vertically diagonal bracing elements of standard effective length interconnecting points on said extension frames and said adapter pins to rigidify said extension frames, said standard length bracing elements interconnecting the same points on the extension frames and the adapter pins regardless of the position of the adapter pins in the base frames and the amount of telescoping of the extension frames in the base frames.

' 2. An extendable shoring scaffold comprising: a pair of horizontally spaced base frames; bracing elements infterconnecting said base frames; a pair of horizontally spaced extension frames mounted on said base frames in telescoping relation; adapter pins adjustably mounted in said base frames and engaged by said extension frames to support the extension frames and the load carried thereby; and vertically diagonal cross braces of standard effective length extending from said adapter pins to tie points adjacent to the tops of said extension frames and serving to rigidify said extension frames, said standard length cross braces interconnecting said tie points adjacent the tops of the extension frames and the adapter pins regardless of the positions of the adapter pins in the base frames and the amount of telescoping of the extension frames in the base frames.

3.'An extendable shoring scaffold comprising: a pair of horizontally spaced base frames; bracing elements interconnecting said base frames; a pair of horizon-tally spaced extension frames mounted on said base frames in telescoping relation; adapter pins adjustably mounted in said base frames and engaged by said extension frames to support the extension frames and the load carried thereby; L-shaped brackets having said adapter pins butt welded to an interior face thereof; a pair of tie pins butt welded to the exterior faces of each of said brackets so that their axes extend at right angles to each other; tie pins mounted adjacent the upper ends of said extension frames with their axes at right angles to each other so as to be complementary to the tie pins on said brackets; and vertically diagonal cross braces of standard effective length interconnecting the tie pins on said brackets and the tie pins on said extension frames and serving to rigidify said extension frames, the same effective length cross braces interconnecting the bracket tie pins and the tie pins adjacent the upper ends of the extension frames regardless of the positions of the adapter pins in the base frames and the amount of telescoping of the extension frames in the base frames.

4. An extendable shoring scaffold comprising: a pair of horizontally spaced base frames; bracing elements interconnecting said base frames; a pair of horizontally spaced extension frames mounted on said base frames in telescoping relation; adapter pins mounted in said base frames and engaged by said extension frames to support the extension frames and the load carried thereby; tie-pin extensions integrally connected to said adapter pins to form unitary structures therewith; L-shaped brackets having clearance holes therethrough receiving said adapter pins and serving to mount the brackets thereon; a tie pin extending outwardly from the leg of each of the L-shaped brackets other than the leg containing said clearance holes; tie pins connected to the extension frames adjacent the upper ends thereof; and vertically diagonal cross braces of standard effective length interconnecting the' tie pins on said bracket and the tie-pin extensions on said the base frames and the amount of telescoping of the extension frames in the base frames.

5. An extendable shoring scaffold comprising: a pair of horizontally spaced base frames, each of said base frames comprising a pair of horizontally spaced vertical legs and struts interconnecting said legs; cross braces interconnecting said base frames to form a substantially self-supporting structure; a pair of horizontally spaced extension frames, each of said extension frames comprising a pair of horizontally spaced legs and struts interconnecting the legs, the legs of said extension frames having an exterior diameter not exceeding the interior diameter of the legs of said base frames and received telescopically therein; adapter pins adjustably mounted in any of a series of vertically spaced holes in the legs of said base frames, said adapter pins being engaged by the legs of said extension frames so as to hold said extension frames in extended position and to support the weight of said extension frames and the load carried thereby; and vertically diagonal bracing means of standard effective length interconnecting said adapter pins and the upper ends of said extension frames and serving to rigidify said extension frames, said standard length bracing means interconnecting the upper ends of said extension frames and said adapter pins regardless of the positions of the adapter pins in the base frames and the amount of telescoping of the extension frames in the base frames.

6. An extendable shoring scaffold comprising: a pair ofhor'izontally spaced base frames, each of said base frames comprising a pair of horizontally spaced vertical legs and struts interconnecting said legs; cross braces interconnecting said base frames to form a substanially self-supporting structure; a pair of horizontally spaced extension frames, each of said extension frames comprising a pair of horizontally spaced legs and struts interconnecting the legs, the legs of said extension frames having an exterior diameter not exceeding the interior diameter of the legs of said base frames and received telescopically therein; adapter pins adjustably mounted in any of a series of vertically spaced holes in the legs of said base frames, said adapter pins being engaged by the legs of said extension frames so as to hold said extension frames in extended position and to support the weight of said extension frames and the load carried thereby; brackets mounted on said adapter pins, each of said brackets having a tie pin mounted thereon; tie pins mounted on said extension frames adjacent to the upper ends of the legs thereof; and vertically diagonal cross braces of standard effective length interconnecting the tie pins on said brackets and the tie pins on said extension frames and serving to rigidify said extension frames, the same effective length cross braces interconnecting the bracket tie pins and the tie pins adjacent the upper ends of the extension frames regardless of the positions of the adapter pins in the base frames and the amount of telescoping of the extension frames in the base frames.

7. An extendable shoring scaffold comprising: a pair of horizontally spaced base frames; bracing elements interconnecting said base frames; a second pair of base frames mounted on said first pair of base frames; bracing elements interconnecting said second pair of base frames, each of said base frames comprising a pair of horizontally spaced vertical legs and struts interconnecting the legs, said base frame legs being tubular; coupling pins inserted into the adjacent ends of the legs of said first and second pair of base frames; securing means extending through the cooperating legs of said base frames and said coupling pins to tie said base frames together; a pair of horizontally spaced extension frames mounted on the upper pair of said base frames, each of said extension frames comprising a pair of horizontally spaced vertical legs joined by struts adjacent their upper ends only, the legs of said extension frames being telescopi- I cally'mountedv-on the legs of the upper pair of base frames; adapter'pins adjustablymounted in any of a series-of vertically spaced holes in' thelegs of the: upper pair of baseframes and engaged by said extension frame legs to support the weigh't'of the. extension frames and the load carried thereby;-and vertically diagonal bracing 7 means of standard effective length interconnecting said adapter pins and the upper ends of said extension-frames and serving to rigidity said extension frames, the same effective lengthbracing means interconnecting the adapter pinsand the, upper ends of the extension framesregardless of the positions of the adapter, pins in the upper ba'se frames and the amountsfof telescoping of the extension frames in the; upper base frames;-

8. Anextendable shoring scaffold comprising a pair;

of horizontally spaced base frames; bracing elements interconnecting said base frames;;a second, pair of base frames mounted on said ,first pair of base frames;- bracing elements interconnecting said ,second'pairf of'base frames, each of said base frames'comprising a pair of horizontally spaced vertical legs and struts interconnect- 3 7 pair of base frames and engaged by said extension frame a series of vertically spaced holes-in the legs of the upper legs tosupportthe weight of ,the extension frames and the load carried thereby; a;pair of tie pins mounted on said adapter pins with the axes of said tie pins substantially at right angles to each other; tie pins mounted 1 adjacent the upper ends of eachof thelegs of the extension frames with the axes of thetie pins on each leg subing the legs,,said base frame legs beingtubular; coupling pins inserted into the adjacent ends of the legsfof said first and second pair of base frames; securing means extending through thecoo'perating legs; ofsaid base I framesand said coupling pins to tie saidbase frames together; a pair of horizontally'spaced; extension frames mounted on the upper pair of said base frames, each of said extension 'frames comprisingfa pair; of horizontally spaced'verticalj legs joined: by struts adjacenttheir upper ends only, the legs of said. extension frames being telescopically mounted on the glegs of the; .upper pairKof b'aseframes; adapterpins adjustably mounted in any'of stantially at right angles to eachother; and vertically diagonal cross braces of standard effective length interconnecting thetie pins on said adapter pins and the tie pins on said extension frames and serving to rigidify said extension frames, the same effective length cross braces interconnecting the tie pins on the'adapter pins and the tie pinsadjacent the upper ends of the extension frames regardless of thepositions 0f the adapter pins in the upper base frames and the amount of telescoping of the extension frames in the upperbasev frames.

References Cited by the'Exaininer RicHARD' COOKE, JR., Primary Examiner. JOEL REZNEK, JACOB L. NACKENOFF, Examiners.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,190,405 June 22, 1965 Robert K. Squire Column 6, line 33, for "substanially" read substantial] column 8, lines 1 to 3, strike out "pair of base frames and engaged by said extension frame a series of vertically spaced EDWARD J. BRENNER Commissioner of Patents ERNEST W. SWIDER Attesting Officer

Claims

1. AN EXTENDABLE SHORING SCAFFOLD COMPRISING: A PAIR OF HORIZONTALLY SPACED BASE FRAMES; BRACING ELEMENTS INTERCONNECTING SAID BASE FRAMES; A PAIR OF HORIZONTALLY SPACED EXTENSION FRAMES MOUNTED ON SAID BASE FRAMES IN TELESCOPING RELATION; ADAPTER PINS ADJUSTABLY MOUNTED IN SAID BASE FRAMES AND ENGAGED BY SAID EXTENSION FAMES TO SUPPORT THE EXTENSION FRAMES AND THE LOAD CARRIED THEREBY; AND VERTICALLY DIAGONAL BRACING ELEMENTS A STANDARD FRAMES AND SAID ADAPTER PINS TO RIGIDIFY SAID EXTENSION FRAMES AND SAID ADAPTER PINS TO RIDIGIDY SAID EXTENSION FRAMES, SAID STANDARD LENGTH BRACING ELEMENTS INTERCONNECTING THE SAME POINTS ON THE EXTENSION FRAMES AND THE ADAPTER PINS REGARDLESS OF THE POSITION OF THE ADAPTER PINS IN THE BASE FRAMES AND THE AMOUNT OF TELESCOPING OF THE EXTENSION FRAMES IN THE BASE FRAMES.