CA1329492C - Apparatus for use in forming concrete walls - Google Patents
Apparatus for use in forming concrete wallsInfo
- Publication number
- CA1329492C CA1329492C CA 602663 CA602663A CA1329492C CA 1329492 C CA1329492 C CA 1329492C CA 602663 CA602663 CA 602663 CA 602663 A CA602663 A CA 602663A CA 1329492 C CA1329492 C CA 1329492C
- Authority
- CA
- Canada
- Prior art keywords
- channeled
- members
- brace
- orientation
- pivot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A brace supports a form during placing of concrete and collapses into a compact state after use. The brace has a pair of channeled members. One channeled member attaches to the form; the other is anchored to a horizontal surface. A pivot joint between first ends of the channeled members allows them to pivot to and from an orientation in which they are overlaid with their channels facing towards one another. A telescopic member controls their relative angular orientation and consequently the orientation of the form. The telescopic member has inner and outer sleeves which are connected with pivot joints to second ends of the channeled members. The inner sleeve is formed with several transverse passages, and the outer sleeve has a single transverse passage that can be aligned with any passage of the inner sleeve. A
locking member inserts through the aligned passages to fix the length of the telescopic member and can be removed to permit separation of the sleeves.
When separated, the sleeves pivot into the channels of the channeled members.
The channeled members can then be pivoted onto one another, producing a relative compact assembly.
A brace supports a form during placing of concrete and collapses into a compact state after use. The brace has a pair of channeled members. One channeled member attaches to the form; the other is anchored to a horizontal surface. A pivot joint between first ends of the channeled members allows them to pivot to and from an orientation in which they are overlaid with their channels facing towards one another. A telescopic member controls their relative angular orientation and consequently the orientation of the form. The telescopic member has inner and outer sleeves which are connected with pivot joints to second ends of the channeled members. The inner sleeve is formed with several transverse passages, and the outer sleeve has a single transverse passage that can be aligned with any passage of the inner sleeve. A
locking member inserts through the aligned passages to fix the length of the telescopic member and can be removed to permit separation of the sleeves.
When separated, the sleeves pivot into the channels of the channeled members.
The channeled members can then be pivoted onto one another, producing a relative compact assembly.
Description
~32~92 APPARATUS FOR USE IN ~ ONCRETE W~LLS
FTF,LD OF THE INVENTION
The invention relates to placing of concrete to form walls and, more specifically, to self-supporting adjustable forms and supports for such forms.
DESCRIPT~ONQF THE PRIQR ART
Concrete walls on major construction sites are forrned by pouring concrete into a cavity defined between a pair of vertical forms often refened to as "falsework". These forrns are commonly prevented from separating by extending tie-rods through aligned apertures in the forms.
Ends of the cavity are commonly closed with wooden bulkheads.
It is necessary to support the forrns in a vertical orientation and to adjust their inclination relative to vertical before placing the concrete. This is presently done with either wood braces or with telescoping steel braces.
The telescoping braces have inner and outer telescoping members apertured transversely at intervals to receive a locking pin. A lower end of each brace isabutted against a board or the like temporarily attached to a horizontal concrete floor where the wall is to be formed; an upper end of each brace is simply engaged with the forrn. Once the wall is placed and set, the braces are removed and the forms are transferred with a crane to another floor or location where another wall is required.
There are two very significant shortcomings in such prior practices. First, considerable manual labour is wasted in installing braces and then adjusting the vertical ~entation of the forms. The braces tend generally to be very awkward and must be worked by several laborers before a form is properly oriented and positively supported. Second, excessive amounts of ' ,.,~ . , ~ ., , . :, . -. ,., ,: . . - ..
. - , : . . , ~ : : ., - ,. . .- ~ . . ... .
132~92 crane time are required. In particular, a crane is commonly required to hold the forrns until all braces have been located and the veltical orientation properly set. 1 here is a very sign;ficant cost associated with devoting a craneto such operations~ as will be readily apparent to those in the construction trades.
Attempts have been made to overcome these problems by providing a rigid self-supporting structure formed of steel beams which attaches to one face of the form. Screw mechanisms acting between a concrete floor and bottom surfaces of the structure permit the entire structure to be tipped to adjust the vertical orientation. This approach has generally notbeen accepted because of the necessarily cumbersome and heavy nature of the structure. The more conventional practice of using elongate wood or telescopic steel braces has persisted.
Another significant shortcoming in the prior art relates to forming of concrete wall which are very significantly inclined relative to vertical. Conventional wood and telescopic steel braces cannot readily support a form which tilts away from the braces. The prior rigid self-supporting structure is inappropriate as the entire weight of the structuremust pivot with the form and any significant inclination beyond vertical would tend to topple both form and structure.
The invention in its various aspects addresses the various problems associated with conventional practices and reduces both labour requirements and the amount of valuable crane time which must be devoted to placing of concrete walls.
~RT~P SU~ARY OF TH13 INVl~Nl'ION
In one aspect, the invention provides apparatus for use in forming concrete walls. The apparatus comprises a form having opposing 1 3 2 ~ 2 faces. One face might typically serve to defime one face of an unset concrete wall . A plurality of supports are spaced apart along the opposite face of the form. Each support includes a first support member extending away from the form and a second support member attached to the form. Means are provided for joining the support members and permitting relative movement of the support members towards and away from one another, preferably de~ming a pivot joint between adjacent end portions of the supports at ~he base of the forrn. Means acting between the support members permit adjustment and fixing of their relative orientation such that the inclination of the form relative to vertical can be adjusted. A single support whose support members have a greater lateral extent may be used rather than a plurality of supports, but this is not preferred. It should be noted that the term "form" as used in this specification is intended to encompass a component which serves to define only one face of a wall or a portion thereof.
The invention has several advantages over the prior art First, the labour involved in erecting a form is considerably reduced. There is no requirement to abut braces and adjust boards or other supports at a lower end of the braces until a form is properly vertically aligned. Second, once the form is located by a crane at a required location and grossly positioned, the crane can be immediately disengaged for use elsewhere on a job site thereby better utilizing the crane. Basically, the apparatus is self-supporting and the vertical orientation of the associated form can be adjusted without requiring crane support. Once a concrete wall is placed and set, the associated forrns can be readily tilted away from the outer surface of the walls, and a crane onceagain engaged to move the apparatus in its entirely to another floor or location. Lastly, the apparatus lends itself readily to forming of wall significantly inclined relative to vertical.
FTF,LD OF THE INVENTION
The invention relates to placing of concrete to form walls and, more specifically, to self-supporting adjustable forms and supports for such forms.
DESCRIPT~ONQF THE PRIQR ART
Concrete walls on major construction sites are forrned by pouring concrete into a cavity defined between a pair of vertical forms often refened to as "falsework". These forrns are commonly prevented from separating by extending tie-rods through aligned apertures in the forms.
Ends of the cavity are commonly closed with wooden bulkheads.
It is necessary to support the forrns in a vertical orientation and to adjust their inclination relative to vertical before placing the concrete. This is presently done with either wood braces or with telescoping steel braces.
The telescoping braces have inner and outer telescoping members apertured transversely at intervals to receive a locking pin. A lower end of each brace isabutted against a board or the like temporarily attached to a horizontal concrete floor where the wall is to be formed; an upper end of each brace is simply engaged with the forrn. Once the wall is placed and set, the braces are removed and the forms are transferred with a crane to another floor or location where another wall is required.
There are two very significant shortcomings in such prior practices. First, considerable manual labour is wasted in installing braces and then adjusting the vertical ~entation of the forms. The braces tend generally to be very awkward and must be worked by several laborers before a form is properly oriented and positively supported. Second, excessive amounts of ' ,.,~ . , ~ ., , . :, . -. ,., ,: . . - ..
. - , : . . , ~ : : ., - ,. . .- ~ . . ... .
132~92 crane time are required. In particular, a crane is commonly required to hold the forrns until all braces have been located and the veltical orientation properly set. 1 here is a very sign;ficant cost associated with devoting a craneto such operations~ as will be readily apparent to those in the construction trades.
Attempts have been made to overcome these problems by providing a rigid self-supporting structure formed of steel beams which attaches to one face of the form. Screw mechanisms acting between a concrete floor and bottom surfaces of the structure permit the entire structure to be tipped to adjust the vertical orientation. This approach has generally notbeen accepted because of the necessarily cumbersome and heavy nature of the structure. The more conventional practice of using elongate wood or telescopic steel braces has persisted.
Another significant shortcoming in the prior art relates to forming of concrete wall which are very significantly inclined relative to vertical. Conventional wood and telescopic steel braces cannot readily support a form which tilts away from the braces. The prior rigid self-supporting structure is inappropriate as the entire weight of the structuremust pivot with the form and any significant inclination beyond vertical would tend to topple both form and structure.
The invention in its various aspects addresses the various problems associated with conventional practices and reduces both labour requirements and the amount of valuable crane time which must be devoted to placing of concrete walls.
~RT~P SU~ARY OF TH13 INVl~Nl'ION
In one aspect, the invention provides apparatus for use in forming concrete walls. The apparatus comprises a form having opposing 1 3 2 ~ 2 faces. One face might typically serve to defime one face of an unset concrete wall . A plurality of supports are spaced apart along the opposite face of the form. Each support includes a first support member extending away from the form and a second support member attached to the form. Means are provided for joining the support members and permitting relative movement of the support members towards and away from one another, preferably de~ming a pivot joint between adjacent end portions of the supports at ~he base of the forrn. Means acting between the support members permit adjustment and fixing of their relative orientation such that the inclination of the form relative to vertical can be adjusted. A single support whose support members have a greater lateral extent may be used rather than a plurality of supports, but this is not preferred. It should be noted that the term "form" as used in this specification is intended to encompass a component which serves to define only one face of a wall or a portion thereof.
The invention has several advantages over the prior art First, the labour involved in erecting a form is considerably reduced. There is no requirement to abut braces and adjust boards or other supports at a lower end of the braces until a form is properly vertically aligned. Second, once the form is located by a crane at a required location and grossly positioned, the crane can be immediately disengaged for use elsewhere on a job site thereby better utilizing the crane. Basically, the apparatus is self-supporting and the vertical orientation of the associated form can be adjusted without requiring crane support. Once a concrete wall is placed and set, the associated forrns can be readily tilted away from the outer surface of the walls, and a crane onceagain engaged to move the apparatus in its entirely to another floor or location. Lastly, the apparatus lends itself readily to forming of wall significantly inclined relative to vertical.
1 32~2 In another aspect, the invention provides a hrace which serves to support a form in an adjustable orientation, substantially in the manner described above, during placing of concrete and which is adapted to collapse into a compact state after use. The brace comprises pair of elongate channeled 5 members, each with a lengthwise-extending channel. U-shaped channel members are the preferred form. A first pivot joint connects first end portions of the channeled members and permits pivoting of the channeled members relative to one another about a predetermined axis to and from an orientation inwhich the channeled members are substantially parallel and overlaid with their 10 chaMels facing toward one another. The brace includes a telescopic member comprising an outer sleeve and an inner sleeve dimensioned to slide within the outer sleeve. A second pivot joint connects the outer sleeve to a second end portion of one channeled member for pivoting about an axis substantially parallel to the predetermined axis to and from a position in which the outer 15 sleeve is located within and aligned with the channel of the one channeled member. A third pivot joint connects the inner sleeve to the second end portion of the other chaMeled member for pivoting about an axis substantially parallel to the predetermined axis to and from a position in which the inner sleeve is Iocated within and aligned with the channel of the other channeled member.
20 Adjusting means permit the length of the telescopic member to be adjusted thereby to adjust the relative angular orientation of the charmeled members. Theadjusting means include locking means for locking the iMer and outer sleeves to one another against relative sliding, the locking means being manually operable to allow separation of the inner and outer sleeves by relative sliding.25 In a typical application, one channeled member may be attached to a form, andthe other may be anchored to a horizontal supporting surface. After use, the ~5~
~: .
132~2 inner and outer sleeves can be separated and pivoted to locate within the channels of the channeled members, and the channeled members can then be pivoted towards one another to arrive at the compact state.
Other aspects of the invention wiil be apparent from a S description of a preferred embodiment below and will be better defined in the appended claims.
DESCRIPTION OF THE DRAWINGS
The invention will be better understood with reference to drawings illustrating a preferred embodiment, in which:
Fig. 1 is a perspective view illustrating apparatus embodying the invention;
Fig. 2 is a perspective view of a brace comprised by the apparatus;
Fig. 3 is a crossffectional view along a central longitudinal axis of a telescopic member of the brace; and, Figs. 4A-4C show successive stages in collapsing of the brace into a compact state after use, fig. 4C being partially &agmented to show the location of parts of the telescopic member otherwise concealed.
DESCRIPTION~ERRED EMBODIMENT
Reference is made to Fig. 1 which illustrates an apparatus 10 embodying the invention. The apparatus 10 comprises a conventional wood form 12 having opposing faces 14, 16. One face 16 serves to define an outer surface of a concrete wall 18 being formed. The other face 14 is accessible to ~ceive support against the outward forces of the concrete until set. Horizontal whalers 20, 22 are attached to the form 12 at vertically spaced-apart locations.A plurality of identical, separate and distinct supports or braces are releasably comlected by the whalers 20~ 22 to the face 14 of the form 12. Only two braces . . .. ,.. , ~., - , .. ,~ ' , . ` ., ',, , ,. ` , - ... . . .
1 3 ~
24, 26 have been specifically illustrated, but the number of braces provided will co~Tespond to the lateral extent of the associated form and of the wall to be fctrmed. Another form 28 defines an opposing outer of the concrete wall 18 is apparent in Fig. 1~ The form 28 is associated with an apparatus identical to theS apparatus 10, but only the form 28 has been illustrated.
A number of matters have been omitted from the illustration of Fig. 1. The forms would normally have aperhlres for receiving threaded tie rods intended to join the two forms to resist separation under the forces exerted by the contained concrete. These apertures may typically be loca~ed under each whaler (and elsewhere if necessary). The whaler 20 which is typical is formed with two channeled steel beams 30, 32 (rather than more conventional wood beams) separated to permit receipt of tie rods so that the tie rods may be fastened against the whaler 20 itself. The cavity defined by the two forms 12, 28 would normally be closed at its opposing ends (such as the end 34 apparent in Fig. 1) with bulkheads. These bulkheads might be formed in a conventional manner of wood members fasten between the forms 12, 28 at ends of the cavity. These are matters which will be readily apparent to those skilled in theart and require no explanation or illustration.
The brace 26 which is typical is better illustrated in Fig. 2.
The brace 26 includes a pair of elongate channeled members 36, 38, each essentially an iron beam with a Uffhaped cross-section transverse to its lengthwise or longitudinal axis, de~ming a lengthwise channel. Adjacent end portions 40, 42 of channeled members 36, 38 are connected at the base or bottom of the form 12 by a pivot joint 43 to permit pivoting movement of the channeled members 36, 38 towards and away from one another. The pivot joint 43 is formed by a pair of triangular steel flanges 44, 46 welded at the end portion 40 of the horizontal chaMeled member 36 and a pivot pin (bolt) 48 ~'`
,: ~ . , :,: : . , :
extended through the lower end portion 42 of the generally vertical channeled member 38. A fastening nut is provided (not illustrated). The flanges 44, 46 space the end portion 42 of the channeled memher 38 ver~ically relative to the end portion 40 of the channeled member 36 to allow pivoting of the members 5 36, 38 to a collapsed state apparent in fig. 4C. The horizontal channeled member 36 can be secured to a horizontal concrete floor where a wall is to be placed, by driving nails (not illustrated) through apertures in an attachment plate 50 welded to the horizontal channeled member 36.
Means are provided for adjusting and fixing the relative 10 orientation of the two channeled members 36, 38 (detailed in figs. 2 and 3).
More specifically, a telescopic member 52 extends between the channeled members 36, 38, inclined relative to vertical, and has its opposing end pivotally connected by pivot joints 54 56 to end portions 58, 60 of the channeled members 36, 38 spaced from the principal pivot joint 43. The pivot 15 joint 54 which is typical is fonned within the channel of the horizontal channeled member 36 and has a pair of apertured lugs 62, 64 which extend outwardly from the channel to receive a pivot pin (bolt) 66 fastened by a nut 68. This outward extension permits access to the pivot joint 54 for repair. The telescopic member 52 includes a first shaft 70 formed with an external left-hand20 screw thread 72 and a second sha~t formed with an external right-hand screw thread 76. An interrnediate member portion 78 located between the first and second shafts 70, 74 has a pair of threaded longitudinal passages 80, 82. Each of the passages 80, 82 receives one of the shafts 70, 74 and has an internal screw thread complementary to the external screw thread of the received shaft.
25 Accordingly, rotation of the intermediate member portion 78 about its longitudinal axis perrnits fine adjustment of the vertical inclination of the form ': ~ ' . ,, . -: . ,: . ' ' " . :' - ' ' ,, . ' : ~
1~2~92 12.
Means are also provided for permitting jgross adjustment of the relative orientation of the channeled members 36, 38 and consequently gross adjustment of the vertical orientation of the form 12 (as detailed in fl'gS. 2 and 3). To that end, the intermediate member portion 78 comprises inner and outer elongate telescoping members 84, 86, which are sleeves. The inner telescoping member 84 is formed with a plurality of longitudinally spaced-apart transverse passages. Exemplary is the passage defined by two aligned apertures 88, 90 in the side wall of the inner telescoping member 84 and specifically indicated in ~Ig. 3. The outer telescoping member 86 is formed with a transverse passage defined by two aligned apertures 92, 94 (also specifically indicated in fig. 3),which can be aligned with any one of the transverse passages formed in the inner telescoping member 84. A locking pin 96 is manually insertable through the transverse passage of the outer telescoping member 86 and any one of the transverse passages of the inner telescoping member 84 to stop relative telescopic movement and to prevent any separation of the telescoping members 84, 86. The gross inclination of the form 12 is of course adjustable in increments corresponding to the spacing of the apertures of the length of the inner telescoping member 84. This accommodates any limitations on the amount of adjustment possible by use of the threaded adjusting arrangement, and most significantly, permits the telescopic member 52 to be separated into tw~parts to permit rapid collapsing into a compact state for transport, as shown in figs. 4A-4C. The locking pin 96 is simply removed manually and the vertical channeled member 36 is pivoted outwardly until the inner and outer telescoping members 84, 86 are disengaged from one another, as in fig. 4A.
The telescoping members 84, 86 can then be pivoted into alignment with the channels of the respective channeled members 36, 38 to which they are 1~2~
pivotally a~ta~hed, as in fig. 4B, and the brace 26 can then be collapsed into acompact state by pivoting the two channeled members 36, 38 together, as in fig.
4C, where they may be seen to be overlaid in substantially parallel relationshipwith their channels facing toward one another.
S The locking pin 96 has a portion extending away from the outer telescoping member 86 and defining a lever arrn 98. This lever arm 98 permits the interrnediate member portion 78 (the inner and outer telescoping members together) to be rotated by hand. This permits fine adjustment of the inclinationof the form 12 relying on the screw thread arrangement described above. The need to unfasten some abutment if gross increments provided by telescoping action are inappropriate is consequently avoided.
Use of the apparatus 10 will be briefly described. The form 12 may initially be laid with its wall-deflning face 16 against a horizontal surface. The whalers 20, 22 may then be fastened to the form 12 in any convenient manner (preferably with clips which permit the whalers to be easily removed for repair of replacement of the form 12). The braces 24, 26 in a collapsed state can then be attached to the whalers 20, 22. This is preferably done by providing apertures in the vertical channeled members associated with the braces 24, 26 and extending bolts into the space between the pair of channeled steel beams constituting each whaler. The braces 24, 26 can then be adjusted by telescoping and fixing their telescopic members until they have substantially the triangular or~entation of Figs. 1 and 2. The other complementary apparatus may be similarly assembled. The two apparatuses may then be righted by hand to an orientation similar to that of fig. 1.
The t vo apparatuses rnay then be flown by crane to a required location. For such purposes, a sling may be connected to each apparatus, and to facilitate connection of the sling, horizontal cross~embers may be provided , '},'i~'' .'- ~
.' ,' ',, ' ', , .. ' '! ' . ', , . , ., , ' 11 ,., . , ., , , , . , , . . . ,, ' ~329~92 between the wooden uprights that would commonly be associated with the forms. To facilitate flying both apparatuses simultaneously, wooden members may be temporarily fastened beeween the two forms 12, 28 so tha~ they forrn essentially a single unit.
Once placed at the required site, the two apparatuses can be positioned manually to the precise location where a wall is to be formed; the crane is no longer required. The supports associated with the apparatuses can then be adjusted with their telescoping and screw thread mechanisms to set the inclination of the forms relative to vertical. The form 12 can be very conveniently tilted away from its vertical orientation, widening the top of cavity between the forms if reineorcing steel assembly is to be introduced. Tie rods can be extended between the forms 12, 28 and bulkheads can be fastened to close the cavity deflmed between the forms. The two apparatuses can thsn be fastened to the floor with nails driven through the apereures of the attachment plates of their respective supports. Concrete can then be placed between the forms and allowed to set. Once the wall is set, the tie rods can be disengaged from the forms, the bulkheads removed, and the forms tilted by telescopic action of the telescopic members of their respective supports to incline the forms to about 1~15 degrees away from the wall. The supports of the two apparatuses can then be released from the surrounding floor structure and flown by crane to another required location. Exact details of use may vary hl responseto user preference.
Several advantages associated with the apparatus 10 should now be apparent. First, a considerable amount of labour otherwise required to erect and adjust the inclination of a form is eliminated. The cost saving is considerable. Second, the apparatus 10 can be conveniently removed from a set - 10- , 132~2 concrete wall and flown by crane to another location. Once the apparatus 10 is grossly positioned at the new location, the crane is no longer required. Crane costs attributable to forming concrete walls is therefore considerably reduced.
When no longer required, the ap"aratus 10 can be disassembled and collapsed 5 into a compact state for transportation to another job site, with its principal components, the braces 24, 26, side~y-side. Additionally, it will be apparent that the apparatus 10, when fastened to the floor with the attachment plates of its braces 24, 26, perrnits the associated form 12 to be tilted not only up to avertical orientation, but well beyond. With the other forrn 2P, oriented at an 10 acute angle with the floor surface immediately surrounding its braces, and parallel to the form 12, a wall can conveniently be formed that is signi~lcantlyinclined relative vertical.
It will be appreciated that a particular embodiment of the invention has been described and that modifications may be made therein 15 without departing from the spirit of the invention or necessarily departing from the scope of the appended claims.
- 11 - ,
20 Adjusting means permit the length of the telescopic member to be adjusted thereby to adjust the relative angular orientation of the charmeled members. Theadjusting means include locking means for locking the iMer and outer sleeves to one another against relative sliding, the locking means being manually operable to allow separation of the inner and outer sleeves by relative sliding.25 In a typical application, one channeled member may be attached to a form, andthe other may be anchored to a horizontal supporting surface. After use, the ~5~
~: .
132~2 inner and outer sleeves can be separated and pivoted to locate within the channels of the channeled members, and the channeled members can then be pivoted towards one another to arrive at the compact state.
Other aspects of the invention wiil be apparent from a S description of a preferred embodiment below and will be better defined in the appended claims.
DESCRIPTION OF THE DRAWINGS
The invention will be better understood with reference to drawings illustrating a preferred embodiment, in which:
Fig. 1 is a perspective view illustrating apparatus embodying the invention;
Fig. 2 is a perspective view of a brace comprised by the apparatus;
Fig. 3 is a crossffectional view along a central longitudinal axis of a telescopic member of the brace; and, Figs. 4A-4C show successive stages in collapsing of the brace into a compact state after use, fig. 4C being partially &agmented to show the location of parts of the telescopic member otherwise concealed.
DESCRIPTION~ERRED EMBODIMENT
Reference is made to Fig. 1 which illustrates an apparatus 10 embodying the invention. The apparatus 10 comprises a conventional wood form 12 having opposing faces 14, 16. One face 16 serves to define an outer surface of a concrete wall 18 being formed. The other face 14 is accessible to ~ceive support against the outward forces of the concrete until set. Horizontal whalers 20, 22 are attached to the form 12 at vertically spaced-apart locations.A plurality of identical, separate and distinct supports or braces are releasably comlected by the whalers 20~ 22 to the face 14 of the form 12. Only two braces . . .. ,.. , ~., - , .. ,~ ' , . ` ., ',, , ,. ` , - ... . . .
1 3 ~
24, 26 have been specifically illustrated, but the number of braces provided will co~Tespond to the lateral extent of the associated form and of the wall to be fctrmed. Another form 28 defines an opposing outer of the concrete wall 18 is apparent in Fig. 1~ The form 28 is associated with an apparatus identical to theS apparatus 10, but only the form 28 has been illustrated.
A number of matters have been omitted from the illustration of Fig. 1. The forms would normally have aperhlres for receiving threaded tie rods intended to join the two forms to resist separation under the forces exerted by the contained concrete. These apertures may typically be loca~ed under each whaler (and elsewhere if necessary). The whaler 20 which is typical is formed with two channeled steel beams 30, 32 (rather than more conventional wood beams) separated to permit receipt of tie rods so that the tie rods may be fastened against the whaler 20 itself. The cavity defined by the two forms 12, 28 would normally be closed at its opposing ends (such as the end 34 apparent in Fig. 1) with bulkheads. These bulkheads might be formed in a conventional manner of wood members fasten between the forms 12, 28 at ends of the cavity. These are matters which will be readily apparent to those skilled in theart and require no explanation or illustration.
The brace 26 which is typical is better illustrated in Fig. 2.
The brace 26 includes a pair of elongate channeled members 36, 38, each essentially an iron beam with a Uffhaped cross-section transverse to its lengthwise or longitudinal axis, de~ming a lengthwise channel. Adjacent end portions 40, 42 of channeled members 36, 38 are connected at the base or bottom of the form 12 by a pivot joint 43 to permit pivoting movement of the channeled members 36, 38 towards and away from one another. The pivot joint 43 is formed by a pair of triangular steel flanges 44, 46 welded at the end portion 40 of the horizontal chaMeled member 36 and a pivot pin (bolt) 48 ~'`
,: ~ . , :,: : . , :
extended through the lower end portion 42 of the generally vertical channeled member 38. A fastening nut is provided (not illustrated). The flanges 44, 46 space the end portion 42 of the channeled memher 38 ver~ically relative to the end portion 40 of the channeled member 36 to allow pivoting of the members 5 36, 38 to a collapsed state apparent in fig. 4C. The horizontal channeled member 36 can be secured to a horizontal concrete floor where a wall is to be placed, by driving nails (not illustrated) through apertures in an attachment plate 50 welded to the horizontal channeled member 36.
Means are provided for adjusting and fixing the relative 10 orientation of the two channeled members 36, 38 (detailed in figs. 2 and 3).
More specifically, a telescopic member 52 extends between the channeled members 36, 38, inclined relative to vertical, and has its opposing end pivotally connected by pivot joints 54 56 to end portions 58, 60 of the channeled members 36, 38 spaced from the principal pivot joint 43. The pivot 15 joint 54 which is typical is fonned within the channel of the horizontal channeled member 36 and has a pair of apertured lugs 62, 64 which extend outwardly from the channel to receive a pivot pin (bolt) 66 fastened by a nut 68. This outward extension permits access to the pivot joint 54 for repair. The telescopic member 52 includes a first shaft 70 formed with an external left-hand20 screw thread 72 and a second sha~t formed with an external right-hand screw thread 76. An interrnediate member portion 78 located between the first and second shafts 70, 74 has a pair of threaded longitudinal passages 80, 82. Each of the passages 80, 82 receives one of the shafts 70, 74 and has an internal screw thread complementary to the external screw thread of the received shaft.
25 Accordingly, rotation of the intermediate member portion 78 about its longitudinal axis perrnits fine adjustment of the vertical inclination of the form ': ~ ' . ,, . -: . ,: . ' ' " . :' - ' ' ,, . ' : ~
1~2~92 12.
Means are also provided for permitting jgross adjustment of the relative orientation of the channeled members 36, 38 and consequently gross adjustment of the vertical orientation of the form 12 (as detailed in fl'gS. 2 and 3). To that end, the intermediate member portion 78 comprises inner and outer elongate telescoping members 84, 86, which are sleeves. The inner telescoping member 84 is formed with a plurality of longitudinally spaced-apart transverse passages. Exemplary is the passage defined by two aligned apertures 88, 90 in the side wall of the inner telescoping member 84 and specifically indicated in ~Ig. 3. The outer telescoping member 86 is formed with a transverse passage defined by two aligned apertures 92, 94 (also specifically indicated in fig. 3),which can be aligned with any one of the transverse passages formed in the inner telescoping member 84. A locking pin 96 is manually insertable through the transverse passage of the outer telescoping member 86 and any one of the transverse passages of the inner telescoping member 84 to stop relative telescopic movement and to prevent any separation of the telescoping members 84, 86. The gross inclination of the form 12 is of course adjustable in increments corresponding to the spacing of the apertures of the length of the inner telescoping member 84. This accommodates any limitations on the amount of adjustment possible by use of the threaded adjusting arrangement, and most significantly, permits the telescopic member 52 to be separated into tw~parts to permit rapid collapsing into a compact state for transport, as shown in figs. 4A-4C. The locking pin 96 is simply removed manually and the vertical channeled member 36 is pivoted outwardly until the inner and outer telescoping members 84, 86 are disengaged from one another, as in fig. 4A.
The telescoping members 84, 86 can then be pivoted into alignment with the channels of the respective channeled members 36, 38 to which they are 1~2~
pivotally a~ta~hed, as in fig. 4B, and the brace 26 can then be collapsed into acompact state by pivoting the two channeled members 36, 38 together, as in fig.
4C, where they may be seen to be overlaid in substantially parallel relationshipwith their channels facing toward one another.
S The locking pin 96 has a portion extending away from the outer telescoping member 86 and defining a lever arrn 98. This lever arm 98 permits the interrnediate member portion 78 (the inner and outer telescoping members together) to be rotated by hand. This permits fine adjustment of the inclinationof the form 12 relying on the screw thread arrangement described above. The need to unfasten some abutment if gross increments provided by telescoping action are inappropriate is consequently avoided.
Use of the apparatus 10 will be briefly described. The form 12 may initially be laid with its wall-deflning face 16 against a horizontal surface. The whalers 20, 22 may then be fastened to the form 12 in any convenient manner (preferably with clips which permit the whalers to be easily removed for repair of replacement of the form 12). The braces 24, 26 in a collapsed state can then be attached to the whalers 20, 22. This is preferably done by providing apertures in the vertical channeled members associated with the braces 24, 26 and extending bolts into the space between the pair of channeled steel beams constituting each whaler. The braces 24, 26 can then be adjusted by telescoping and fixing their telescopic members until they have substantially the triangular or~entation of Figs. 1 and 2. The other complementary apparatus may be similarly assembled. The two apparatuses may then be righted by hand to an orientation similar to that of fig. 1.
The t vo apparatuses rnay then be flown by crane to a required location. For such purposes, a sling may be connected to each apparatus, and to facilitate connection of the sling, horizontal cross~embers may be provided , '},'i~'' .'- ~
.' ,' ',, ' ', , .. ' '! ' . ', , . , ., , ' 11 ,., . , ., , , , . , , . . . ,, ' ~329~92 between the wooden uprights that would commonly be associated with the forms. To facilitate flying both apparatuses simultaneously, wooden members may be temporarily fastened beeween the two forms 12, 28 so tha~ they forrn essentially a single unit.
Once placed at the required site, the two apparatuses can be positioned manually to the precise location where a wall is to be formed; the crane is no longer required. The supports associated with the apparatuses can then be adjusted with their telescoping and screw thread mechanisms to set the inclination of the forms relative to vertical. The form 12 can be very conveniently tilted away from its vertical orientation, widening the top of cavity between the forms if reineorcing steel assembly is to be introduced. Tie rods can be extended between the forms 12, 28 and bulkheads can be fastened to close the cavity deflmed between the forms. The two apparatuses can thsn be fastened to the floor with nails driven through the apereures of the attachment plates of their respective supports. Concrete can then be placed between the forms and allowed to set. Once the wall is set, the tie rods can be disengaged from the forms, the bulkheads removed, and the forms tilted by telescopic action of the telescopic members of their respective supports to incline the forms to about 1~15 degrees away from the wall. The supports of the two apparatuses can then be released from the surrounding floor structure and flown by crane to another required location. Exact details of use may vary hl responseto user preference.
Several advantages associated with the apparatus 10 should now be apparent. First, a considerable amount of labour otherwise required to erect and adjust the inclination of a form is eliminated. The cost saving is considerable. Second, the apparatus 10 can be conveniently removed from a set - 10- , 132~2 concrete wall and flown by crane to another location. Once the apparatus 10 is grossly positioned at the new location, the crane is no longer required. Crane costs attributable to forming concrete walls is therefore considerably reduced.
When no longer required, the ap"aratus 10 can be disassembled and collapsed 5 into a compact state for transportation to another job site, with its principal components, the braces 24, 26, side~y-side. Additionally, it will be apparent that the apparatus 10, when fastened to the floor with the attachment plates of its braces 24, 26, perrnits the associated form 12 to be tilted not only up to avertical orientation, but well beyond. With the other forrn 2P, oriented at an 10 acute angle with the floor surface immediately surrounding its braces, and parallel to the form 12, a wall can conveniently be formed that is signi~lcantlyinclined relative vertical.
It will be appreciated that a particular embodiment of the invention has been described and that modifications may be made therein 15 without departing from the spirit of the invention or necessarily departing from the scope of the appended claims.
- 11 - ,
Claims (6)
1. A brace for use in supporting a form in an adjustable orientation during placing of concrete and adapted to collapse into a compact state after use, comprising:
a pair of elongate channeled members, each of the members comprising a channel extending lengthwise along the member, each of the members comprising first and second opposing end portions;
a first pivot joint connecting the first end portions of the channeled members, the first pivot joint permitting pivoting of the channeled members relative to one another about a predetermined pivot axis to and from an orientation in which the channeled members are substantially parallel and overlaid with their channels facing toward one another;
a telescopic member comprising an outer sleeve and an inner sleeve dimensioned to slide within the outer sleeve;
a second pivot joint connecting the outer sleeve to the second end portion of one of the channeled member for pivoting about an axis substantially parallel to the predetermined pivot axis to and from a position inwhich the outer sleeve is substantially aligned with and located within the channel of the one channeled member;
a third pivot joint connecting the inner sleeve to the second end portion of the other of the channeled members for pivoting about an axis substantially parallel to the predetermined pivot axis to and from a position inwhich the inner sleeve is substantially aligned with and located within the channel of the other channeled member;
adjusting means for adjusting the length of the telescopic member thereby to adjust the relative angular orientation of the channeled members, the adjusting means comprising locking means for locking the inner and outer sleeves to one another against relative sliding, the locking means being manually operable to allow separation of the inner and outer sleeves by relative sliding;
whereby, after use, the inner and outer sleeves can be separated and pivoted to locate within the channels of the channeled members and the channeled members can then be pivoted towards one another to achieve the compact state.
a pair of elongate channeled members, each of the members comprising a channel extending lengthwise along the member, each of the members comprising first and second opposing end portions;
a first pivot joint connecting the first end portions of the channeled members, the first pivot joint permitting pivoting of the channeled members relative to one another about a predetermined pivot axis to and from an orientation in which the channeled members are substantially parallel and overlaid with their channels facing toward one another;
a telescopic member comprising an outer sleeve and an inner sleeve dimensioned to slide within the outer sleeve;
a second pivot joint connecting the outer sleeve to the second end portion of one of the channeled member for pivoting about an axis substantially parallel to the predetermined pivot axis to and from a position inwhich the outer sleeve is substantially aligned with and located within the channel of the one channeled member;
a third pivot joint connecting the inner sleeve to the second end portion of the other of the channeled members for pivoting about an axis substantially parallel to the predetermined pivot axis to and from a position inwhich the inner sleeve is substantially aligned with and located within the channel of the other channeled member;
adjusting means for adjusting the length of the telescopic member thereby to adjust the relative angular orientation of the channeled members, the adjusting means comprising locking means for locking the inner and outer sleeves to one another against relative sliding, the locking means being manually operable to allow separation of the inner and outer sleeves by relative sliding;
whereby, after use, the inner and outer sleeves can be separated and pivoted to locate within the channels of the channeled members and the channeled members can then be pivoted towards one another to achieve the compact state.
2. The brace of claim 1 in which the adjusting means comprise:
a plurality of passages formed in the one of the inner and outer sleeves transverse to its lengthwise axis and spaced-apart along the one of the inner and outer sleeve; and, at least one passage formed in the other of the inner and outer sleeves transverse to its lengthwise axis and positioned to align with any one of the plurality of transverse passages; and, a locking member insertable through the at least one transverse passage and an aligned one of the plurality of transverse passages to stop relative sliding of the inner and outer sleeves.
a plurality of passages formed in the one of the inner and outer sleeves transverse to its lengthwise axis and spaced-apart along the one of the inner and outer sleeve; and, at least one passage formed in the other of the inner and outer sleeves transverse to its lengthwise axis and positioned to align with any one of the plurality of transverse passages; and, a locking member insertable through the at least one transverse passage and an aligned one of the plurality of transverse passages to stop relative sliding of the inner and outer sleeves.
3. The brace of claim 2 comprising:
a first shaft which couples the outer sleeve to the second pivot joint, the first shaft comprising a first external screw thread;
means attached to the outer sleeve and defining a first passage formed with a first internal screw thread, the first internal screw thread beingcomplementary to and meshed with the first external screw thread, the first passage directing the first shaft into the interior of the outer sleeve;
a second shaft which connects the inner sleeve to the third pivot joint, the second shaft comprising a second external screw thread;
means attached to the inner sleeve and defining a second passage formed with a second internal screw thread, the second internal screw thread being complementary to and meshed with the second external screw thread, the second passage directing the second shaft into the interior of the inner sleeve; one of the first and second external screw threads being a left-hand thread and the other of the first and second external screw threads being a right-hand thread.
a first shaft which couples the outer sleeve to the second pivot joint, the first shaft comprising a first external screw thread;
means attached to the outer sleeve and defining a first passage formed with a first internal screw thread, the first internal screw thread beingcomplementary to and meshed with the first external screw thread, the first passage directing the first shaft into the interior of the outer sleeve;
a second shaft which connects the inner sleeve to the third pivot joint, the second shaft comprising a second external screw thread;
means attached to the inner sleeve and defining a second passage formed with a second internal screw thread, the second internal screw thread being complementary to and meshed with the second external screw thread, the second passage directing the second shaft into the interior of the inner sleeve; one of the first and second external screw threads being a left-hand thread and the other of the first and second external screw threads being a right-hand thread.
4. The brace of claim 3 in which the locking member has a portion which extends away from the outer telescoping member when the locking member is inserted through the at least one transverse passage and an aligned one of the plurality of transverse passages and which defines a handle permitting the inner and outer sleeves to be rotated together by hand.
5. The brace of claim 1 in which:
each of the channeled members is a beam with a U-shaped cross-section transverse to its length;
the first pivot joint comprises a pivot pin aligned with the predetermined pivot axis, a pair of aligned apertures formed in the first end portion of a first of the pair of channeled members and receiving the pivot pin,and a pair of connecting structures attached to the first end portion of a second of the pair of channeled member, each of the connecting structures comprising one of a pair of aligned apertures that receive the pivot pin; and, the connecting structures space the first end portion of the first channeled member from the first end portion of the second channeled member in a direction permitting relative pivoting of the channeled members to the substantially parallel, overlaid orientation.
each of the channeled members is a beam with a U-shaped cross-section transverse to its length;
the first pivot joint comprises a pivot pin aligned with the predetermined pivot axis, a pair of aligned apertures formed in the first end portion of a first of the pair of channeled members and receiving the pivot pin,and a pair of connecting structures attached to the first end portion of a second of the pair of channeled member, each of the connecting structures comprising one of a pair of aligned apertures that receive the pivot pin; and, the connecting structures space the first end portion of the first channeled member from the first end portion of the second channeled member in a direction permitting relative pivoting of the channeled members to the substantially parallel, overlaid orientation.
6. The brace of claim 1, 2, 3 or 4 in which a first of the channeled member is adapted for attachment to the from in a substantially vertical orientation substantially parallel to the form and a second of the channeled members is adapted for securement to a horizontal surface in an orientation substantially parallel to the horizontal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 602663 CA1329492C (en) | 1989-06-13 | 1989-06-13 | Apparatus for use in forming concrete walls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 602663 CA1329492C (en) | 1989-06-13 | 1989-06-13 | Apparatus for use in forming concrete walls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1329492C true CA1329492C (en) | 1994-05-17 |
Family
ID=4140201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 602663 Expired - Lifetime CA1329492C (en) | 1989-06-13 | 1989-06-13 | Apparatus for use in forming concrete walls |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1329492C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2201194A1 (en) * | 2007-09-13 | 2010-06-30 | Hal Brackets Pty Ltd | A formwork clamp |
| WO2013016760A1 (en) * | 2011-08-03 | 2013-02-07 | Bracesava Pty Ltd | Improvements in formwork construction |
| FR2997429A1 (en) * | 2012-10-30 | 2014-05-02 | Charvin Ind | Element assembly for installation of wind-bracing along e.g. synthetic hardcore wall of building, has lengthwise adjustable struts comprising fixing units that engage with fixing units of posts and elongated elements |
| GB2508263A (en) * | 2013-09-03 | 2014-05-28 | Fast Form Systems Ltd | An adjustable support for use in shuttering formwork |
| WO2014198973A1 (en) * | 2013-06-11 | 2014-12-18 | Oscar Ramos Diaz | Construction implement |
| GB2533172A (en) * | 2015-01-07 | 2016-06-15 | Fast-Form Systems Ltd | A method for erecting a shuttering framework |
| CN107662190A (en) * | 2017-10-24 | 2018-02-06 | 张冬 | A kind of universal panel housings assembly or fitting table |
| CN108019039A (en) * | 2017-11-28 | 2018-05-11 | 天津市鑫福盛新型建筑模板有限公司 | A kind of New Type Architecture Mode support device preventing tilting |
| CN111706075A (en) * | 2020-06-22 | 2020-09-25 | 银广厦集团有限公司 | Prefabricated template building system based on BIM technology |
| US10907312B2 (en) | 2016-09-20 | 2021-02-02 | Fast-Form Systems Ltd | Road form work |
| US11149450B2 (en) | 2017-04-18 | 2021-10-19 | Fast-Form Systems Ltd | Formwork base |
| CN115324337A (en) * | 2022-07-21 | 2022-11-11 | 北京城乡中昊建设有限责任公司 | Supporting and positioning device for wall formwork |
| US11753834B2 (en) * | 2020-10-14 | 2023-09-12 | Premform Limited | Formwork systems and related methods |
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1989
- 1989-06-13 CA CA 602663 patent/CA1329492C/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2201194A4 (en) * | 2007-09-13 | 2013-05-29 | Hal Brackets Pty Ltd | A formwork clamp |
| EP2201194A1 (en) * | 2007-09-13 | 2010-06-30 | Hal Brackets Pty Ltd | A formwork clamp |
| WO2013016760A1 (en) * | 2011-08-03 | 2013-02-07 | Bracesava Pty Ltd | Improvements in formwork construction |
| FR2997429A1 (en) * | 2012-10-30 | 2014-05-02 | Charvin Ind | Element assembly for installation of wind-bracing along e.g. synthetic hardcore wall of building, has lengthwise adjustable struts comprising fixing units that engage with fixing units of posts and elongated elements |
| WO2014198973A1 (en) * | 2013-06-11 | 2014-12-18 | Oscar Ramos Diaz | Construction implement |
| US10844618B2 (en) | 2013-09-03 | 2020-11-24 | Fast-Form Systems Ltd | Adjustable support |
| GB2508263B (en) * | 2013-09-03 | 2014-10-08 | Fast Form Systems Ltd | An adjustable support |
| GB2508263A (en) * | 2013-09-03 | 2014-05-28 | Fast Form Systems Ltd | An adjustable support for use in shuttering formwork |
| GB2533172A (en) * | 2015-01-07 | 2016-06-15 | Fast-Form Systems Ltd | A method for erecting a shuttering framework |
| GB2533172B (en) * | 2015-01-07 | 2017-04-26 | Fast-Form Systems Ltd | A method for erecting a shuttering framework |
| US10907312B2 (en) | 2016-09-20 | 2021-02-02 | Fast-Form Systems Ltd | Road form work |
| US11149450B2 (en) | 2017-04-18 | 2021-10-19 | Fast-Form Systems Ltd | Formwork base |
| CN107662190A (en) * | 2017-10-24 | 2018-02-06 | 张冬 | A kind of universal panel housings assembly or fitting table |
| CN108019039A (en) * | 2017-11-28 | 2018-05-11 | 天津市鑫福盛新型建筑模板有限公司 | A kind of New Type Architecture Mode support device preventing tilting |
| CN111706075A (en) * | 2020-06-22 | 2020-09-25 | 银广厦集团有限公司 | Prefabricated template building system based on BIM technology |
| US11753834B2 (en) * | 2020-10-14 | 2023-09-12 | Premform Limited | Formwork systems and related methods |
| CN115324337A (en) * | 2022-07-21 | 2022-11-11 | 北京城乡中昊建设有限责任公司 | Supporting and positioning device for wall formwork |
| CN115324337B (en) * | 2022-07-21 | 2024-04-26 | 北京城乡中昊建设有限责任公司 | Supporting and positioning device for wall template |
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