US3923286A

US3923286A - Shoring and jacking rig

Info

Publication number: US3923286A
Application number: US525320A
Authority: US
Inventors: Donald D Raugh
Original assignee: National Steel Corp
Current assignee: National Steel Corp
Priority date: 1974-11-19
Filing date: 1974-11-19
Publication date: 1975-12-02
Anticipated expiration: 1992-12-02

Abstract

A shoring and jacking rig is provided in which a pair of compression members pivoted at one end to a bracket or brackets for engaging a shored member are pivoted at their opposite end to the upper side of a pair of beams. These beams are mounted on their underside transversely to and for sliding movement on rails parallel to and spaced on opposite sides of the vertical plane of the compression members. Adjustable tension members are connected between the beams on opposite sides of the vertical plane of the compression members so that, by adjustment of the length of the tension members, the beams move toward or away from each other thereby varying the height of the upper ends of the compression members.

Description

United States Patent 11 1 [111 3,923,286 Raugh Dec. 2, 1975 SHORING AND JACKING RIG Primary ExaminerAl Lawrence Smith [75] Inventor: Donald D. Raugh, Grosse lle, Mich. Assistant Examiner-Robert Watson Attorney, Agent, or Ftrm-Shanley, ONell and Baker [73] Assignee: National SteelCorporation,

Pittsburgh, Pa. [57] ABSTRACT [22] Filed: Nov. 19, 1974 A shoring and jacking rig is provided in which a pair of compression members pivoted at one end to a [21] Appl' 525320 bracket or brackets for engaging a shored member are pivoted at their opposite end to the upper side of a [52] US. Cl. 254/84; 248/354 S; 254/126; p of m These beams r mounted n h ir.

254/133 A derside transversely to and for sliding movement on [51] Int. Cl. B66F 3/08 rails parallel to n spaced on pp i Sides of the [58] Field of Search 254/126, 133 A, 122, 100, vertical plane of the compression members. Adjust- 254/9 R, 84; 248/354 5, 405 able tension members are connected between the 1 beams on opposite sides of the vertical plane of the [56] References Cited compression members so that, by adjustment of the UNlTED STATES PATENTS length of the tension members, the beams rnove 2.624.535 1/1953 Bollhoefer 254/122 Wa or away from each other thereby varying the 3,160,228 12/1964 Steed 254/122 helght Ofthe upper ends of the compress'on members' 12 Claims, 2 Drawing Figures SHORING AND JACKING RIG BACKGROUND OF THE INVENTION This invention is related to shoring and jacking devices. In one of its aspects, this invention is related to high capacity structural shoring and jacking devices. In yet another of its aspects, this invention is related to jacking and shoring rigs adaptable for easy assembly and disassembly in a wide range of field conditions.

Although a variety of devices are available which are suitable for'structural shoring and jacking, a rig made up of conveniently sized components that can be easily assembled and disassembled at the work site and which is capable of high capacity work would be economically advantageous. Such a device hitherto has not been available.

I have discovered that using readily available components, a jacking rig can be assembled that is sufficiently versatile to accommodate a broad range of field conditions, including high capacity support work and yet is of economical construction.

It is therefore an object of this invention to provide a jacking and shoring rig for high capacity support work.

It is another object of this invention to provide a high capacity jacking and shoring rig that is readily assembled and disassembled at the job site.

Other aspects, objects and the several advantages of this invention will be readily apparent to those skilled in the art from a reading of this disclosure and the appended claims.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a preferred embodiment of the invention and FIG. 2 is a side elevational view of a yoke which can be substituted in the structure of FIG. 1.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT Referring now to the drawing, applicants shoring and jacking rig is illustrated. This structure includes a pair of compression members, indicated generally at 3, of equal length pivoted at one end 5 to brackets 7 for engaging a shored member 9 and pivoted at the other end 11 to a pair of beams 13. The compression members 3 are mounted on the beams 13 in a relationship such that the pivotal action of the compression members 3 from the pivot points 11 at the beams describes a plane perpendicular to each of the beams 13. The beams 13 are mounted for sliding movement on spaced rails 15 that are parallel to and located on opposite sides of the vertical plane of the compression members 3. Tension rods 17 adjustable in length by turnbuckles 16 are connected between the beams 13 on opposite sides of the vertical plane of the compression members 3. Adjustment of the length of the tension members 17 by turnbuckles 16 causes the beams 13 to move toward each other or allows them to be moved away from each other thereby varying the height of the upper ends 5 of the compression members 3. By setting the beams 13 sufficiently close to each other, the brackets or column engaging means 7 pivoted to the ends of the compression members 3 can be brought to bear on opposite sides of the column 9 and, upon fixing the brackets 7 to the column 9 by bolting or welding (not shown), vertical shoring or adjustment of column 9 is achieved.

Anchor brackets 21 receive the ends of tension rods 17, the rods being threaded to receive nuts 18, which can be used to supplement turnbuckles 16. The anchor brackets are at equal distances from the vertical plane of the compression members 30 so that maximum utilization can be made of the combination of mechanical advantage and access for ease of operation and safety. There is also provision for the use of an additional pair of tension members 19. This second pair of tension members 19 are connected to beams 13 at points on the webs close to the lower flange so as to counteract any torque action on the beams by tension members 17 which might tend to cause them to rotate or roll in their movement along rails 15.

The compression members 3 are preferably of equal length so that equal directional force can be brought to bear on opposite sides of the construction member 9 being supported. The compression members 3 can be made out of a variety of materials and in a variety of shapes depending on the compression force to which they will be subjected. Compression members 3 are shown as heavy cylindrical piping, for example 6 inch diameter steel pipe, but obviously other cross sectional members, such as l-I-beams, would perform satisfactorily. The versatility of the jacking device 1 can be increased by constructing the compression members 3 in sections 27 so that sections can be combined to obtain the overall length desired. This is easily done with cylindrical piping by using sleeves 29 that are held in place by bolts (not shown) to hold the pipe sections together.

At the upper end of each compression member 3 is a connection element 5 and at the lower end a connection element 11 adapted for pivotal connection by provision of pin holes. The structural member engaging means 7 pivotally connected by pin 6 to connection element 5 of each compression member 3 can be of any of a variety of shapes to accommodate the construction member 9 that it engages. For example, the engaging surfaces of the cooperating engaging means 7 can be flat to accommodate I-shape or I-I-shapes or they can be rounded to accommodate cylindrical construction members. The engaging means 7 can be attached to the construction member which it supports by being welded thereto or holes can be provided both in the engaging means and in the suppported member to accommodate connection by bolts.

At the lower end of each of the pair of beams 13 there is a pivoting bracket or pivotal bearing means 31 carried by an inverted channel or U-shape 35 which mates with the connection element 11 on that end of the compression member 3 and a pin 33 forms a pivotal connection at this point. The pivotal connections at 33 are aligned with the longitudinal axis of the beams 13 and the compression members 3 are thus pivotally connected so as to act in a plane perpendicular to each of the beams 13. The beams 13 are also supplied with pairs of anchor means 21 spaced on either side of the verticalplane of the compression members so that tension rods 17 can be attached at equal distances on either side of the vertical plane of the compression members 3. Only one pair of anchor means 21 on each side of pivoting bracket 31 is necessary to the operation of the invention, but a second pair 23 for tension members 19 located close to the lower flange of beams 13 could be advantageous as discussed above. Suitable tension rod attachment means can comprise, among others, the holes 23 drilled in the webs of the beams (as 3 for rods 19) or anchors 21 attached to the top of the beams (as for rod 17) having suitable notches or holes for inserting tension rods. The pivoting bracket 31 and the attachment means 21, 23 for the tension members can be attached directly to the beams 13 or, as shown and already described, to separate inverted channel 35 carried by each beam 13. The separate plate 35 can be bolted to the beams.

In order for the beams 13 to move toward each other as the tension members 17 and 19 are shortened, each of the beams is also provided at each end with a slideable rail engaging means 25 which may take the form of a U-shaped channel which is adapted to be bolted to the beam or welded thereto to slideably ride on and embrace each rail on which the rigging superstructure slides. Overlap of the depending flanges of channels 25 on both sides of the rail 15 assures that the rigging superstructure will not slip off the rail 15 during operation. Slideable rail engaging means 25 are fixed to the beams 13 in alignment with each other so that the rails 15 on which the beams 13 are mounted will be parallel to the vertical plane of compression members To assure ease of operation, the slideable rail engaging means 25 can comprise a low friction plate in the area of contact, e.g., an oil impregnated porous metal plate, and finished plates 26 on rails 15 can be used to facilitate the sliding action. At ground level, the rails 15 can be fixed to supporting timbers or other structure made stationary on the ground. At high elevations, the rails 15 can be affixed to the structure on which they are being used or a separate tower for support can be constructed.

The tension members 17, 19 can be steel rods of any elongated material of strength suitable to withstand the tension applied in the operation of the rig. Metal rods with threaded ends can be used and shortened using nuts 37 on the ends of the rods positioned on the outside of the parallel beams 13. The rods 17, 19 can contain turnbuckles 39 so that either the securing nuts 37 of the turnbuckles 39 or both can be used for adjustment of tension. In operation of the rig, tension may be applied equally to pairs of tension rods 17, 19 spaced on either side and equidistant from the plane of the compression members 3.

Sizing of the component parts and material of construction of the shoring and jacking rig of this invention to support loads of varying size is within the skill of the art. Although, particularly in handling loads of five to hundreds of tons, metal components are primarily envisioned, it is within the scope of the invention to use any material of sufficient strength safely to bear the load to which it is subjected.

Referring again to the drawing, the operation of the rig in shoring a vertical column 9 supporting a 44 ton load can be advantageously explained. The rigging device of this invention is shown engaging an Ibeam 9 which is shown in partial cut-away so that the engagement of the device and the engaged construction member can be shown.

Parallel rails 15 have been fixed in position adjacent to the supported member 9. The shoring rig mounted on the rails 15 comprises a pair of I-beams 13, 8 feet in length on each of which has been placed an inverted channel member 35 on which is welded at the midpoint of the beam 13 a pivoting bracket 31 and on either side of the pivoting bracket 31 are anchor brackets 21 with holes 1% feet from the beam 13 midpoint to accommodate l-inch diameter tension rods 17. Each beam 13 also has at each of its ends on the side opposite the pivoting brackets 31 an inverted channel member 25 welded to the beam 13 to form a rail engaging means by which the rig rides on the rails 15. Each beam 13 is also pierced at a position three feet from its midpoint slightly above the rail engaging means 25 to accommodate a second pair of tension rods 19.

Compression means 3, made up of 6-inch I.D. standard pipe sections 27 joined by 7% inch I.D. pipe sleeves 29 so that the compression members 3 are of equal 16% foot length, are pivotally connected to the beams 13 at pivot points 33. With the beams 13 set about 16 feet apart the compression members 3 are pivoted in position in a plane that is perpendicular to each of the beams 13 so that the structural member engaging means 7, made up of paired right and left hand 6 4X% inch angle irons, pivotally connected to the upper ends 5 of the compression means 3 engage the central portion of the I-beam 9 which is being supported. The engaging means 7 are welded in position to the I-beam 9.

The shoring action is accomplished by shortening the tension rods 17 and if desired rods 19 also. The supported member 9 is raised by increasing the tension on tension members l7, 19 or is lowered by decreasing the tension on tension members 17, 19.

A major desideratum in the development of the present invention was the provision of a package of structural members which could be put together to assemble a shoring and jacking device when and where needed. For this reason, the compression members 3 are made up of sections 27 that can be assembled into members of desired length for a given situation and this also applies to the tension members 17 and 19 which can incorporate a plurality of turnbuckles to accomplish the same purpose. U-shape or channel members 35 carry the pivoting bracket 21 and a plurality of anchor brackets for combination with any desired length beam 13, channel member 35 being bolted in place or held in place by the weight ofcompression members 3. Channel members 35 snuggle embrace the upper portions of beams 13 to give a stable structure while at the same time making it possible to slide channel member 35 along beam 13 to position pivoting bracket 31 properly relative to a structural member to be shored up. It will be understood that where channel member 35 is bolted to beam 13, the necessary holes can be drilled in the top flange of beam 13 for this purpose.

In FIG. 2 a modification is shown in which an integral bracket 7 takes the place of the two

separate brackets

7, 7 of FIG. 1 so that the structure of FIG. 2 can be used to support a horizontal girder or beam 9' rather than a column. In FIG. 2, compression members 3, 3' correspond to members 3, 3 in FIG. 1 and the omitted structure in FIG. 2 would correspond to the remaining structure in FIG. 1.

From the description above, in which is set forth a specific application of the device of this invention, it can be seen that a readily assembled and knocked down device of general applicability in the field of shoring and jacking, particularly in handling high capacity loads, is provided.

I claim:

1. A shoring and jacking rig comprising a. a plurality of spaced, parallel rail means,

b. a pair of spaced parallel beams with their length disposed at right angles to the length of the rail means,

c. rail engaging means affixed to the beams for slideably connecting the beams and the rail means for movement of the beams along the length of the rail means,

d. means associated with the rail engaging means pre venting relative movement of the beams in a direction transverse to the length of the rail means,

e. a slideable support member resting on each beam intermediate the ends of the beam, each slideable support member having depending flanges snugly embracing the upper portion of the associated beam,

f. pivotal bearing means mounted on each slideable support member, both pivotal bearing means being located in a single plane parallel to the rails and perpendicular to the beams,

g. a pair of elongated compression members, each elongated compression member having its lower end pivotally connected to a different one of the pivotal bearing means, the pivotal connection between the lower end of each elongated compression member and the pivotal bearing means constraining the elongated compression members to pivoted movement in the single plane,

h. a pivot means at the upper end of each elongated compression member,

. structural member engaging means pivotally connected to the pivot means at the upper end of each elongated compression member,

j. tension rod anchor means carried by each beam on each side of the single plane,

k. tension rod means connecting anchor means carried by one beam on one side of the single plane with anchor means carried by the other beam on the same side of the single plane,

. tension rod means connecting anchor means carried by one beam on the other side of the single plane with anchor means carried by the other beam on the same side of the single plane, and

m. means associated with each tension rod means for decreasing the distance between beams and thereby raising the elevation of the structural member engaging means.

2. The structure of claim 1 in which means (i) comprise two elements one pivotally mounted on one elongated compression member and one pivotally mounted on the other elongated compression member with no direct physical connection between the two elements.

3. The structure of claim 2 in which the rail engaging means of limitation (c) include low friction surfaces in engagement with the rail means.

4. The structure of claim 1 in which the structural member engaging means of limitation (i) comprises an integral structural member presenting an upwardly facing supporting surface.

5. The structure of claim 4 in which the rail engaging means of limitation (c) include low friction surfaces in engagement with the rail means.

6. The structure of claim 4 in which tension rod anchor means of limitation (j) are carried by each beam at points spaced below the top surface of the beam.

7. The structure of claim 6 in which the tension rod anchor means of limitation (j) are mounted on each slideable support member.

8. The structure of claim 1 in which the rail engaging means of limitation (c) include low friction surfaces in engagement with the rail means.

9. The structure of claim 8 in which tension rod anchor means of limitation (j) are carried by each beam at points spaced below the top surface of the beam.

10. The structure of claim 9 in which the tension rod anchor means of limitation (j) are mounted on each slideable support member.

11. The structure of claim 3 in which tension rod anchor means of limitation (j) are carried by each beam at points spaced below the top surface of the beam.

12. The structure of claim 11 in which tension rod anchor means of limitation (j) are mounted on each slideable support member. =l

Claims

1. A shoring and jacking rig comprising a. a plurality of spaced, parallel rail means, b. a pair of spaced parallel beams with their length disposed at right angles to the length of the rail means, c. rail engaging means affixed to the beams for slideably connecting the beams and the rail means for movement of the beams along the length of the rail means, d. means associated with the rail engaging means preventing relative movement of the beams in a direction transverse to the length of the rail means, e. a slideable support member resting on each beam intermediate the ends of the beam, each slideable support member having depending flanges snugly embracing the upper portion of the associated beam, f. pivotal bearing means mounted on each slideable support member, both pivotal bearing means being located in a single plane parallel to the rails and perpendicular to the beams, g. a pair of elongated compression members, each elongated compression member having its lower end pivotally connected to a different one of the pivotal bearing means, the pivotal connection between the lower end of each elongated compression member and the pivotal bearing means constraining the elongated compression members to pivoted movement in the single plane, h. a pivot means at the upper end of each elongated compression member, i. structural member engaging means pivotally connected to the pivot means at the upper end of each elongated compression member, j. tension rod anchor means carried by each beam on each side of the single plane, k. tension rod means connecting anchor means carried by one beam on one side of the single plane with anchor means carried by the other beam on the same side of the single plane, l. tension rod means connecting anchor means carried by one beam on the other side of the single plane with anchor means carried by the other beam on the same side of the single plane, and m. means associated with each tension rod means for decreasing the distance between beams and thereby raising the elevation of the structural member engaging means.

12. The structure of claim 11 in which tension rod anchor means of limitation (j) are mounted on each slideable support member.