CA2063675A1 - Vertical control joint groover for concrete construction - Google Patents
Vertical control joint groover for concrete constructionInfo
- Publication number
- CA2063675A1 CA2063675A1 CA 2063675 CA2063675A CA2063675A1 CA 2063675 A1 CA2063675 A1 CA 2063675A1 CA 2063675 CA2063675 CA 2063675 CA 2063675 A CA2063675 A CA 2063675A CA 2063675 A1 CA2063675 A1 CA 2063675A1
- Authority
- CA
- Canada
- Prior art keywords
- former
- concrete
- vertical control
- structure defined
- guiding surface
- 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.)
- Abandoned
Links
- 238000010276 construction Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- Road Paving Structures (AREA)
- Road Repair (AREA)
Abstract
III. ABSTRACT
A vertical control joint forming tool having an elongated concrete former of generally triangular cross-sectional configuration which includes a pair of side portions that converge to a joint forming apex, the opposite terminal portions thereof curving outwardly to form concrete radiusing flanges. Facing opposite the joint forming apex is a substantially flat guiding surface which extends laterally across between the opposite radiusing flanges thereof. A shank carrying the handle extends upwardly and rearwardly from the rear end of the former in supporting relation thereto.
A vertical control joint forming tool having an elongated concrete former of generally triangular cross-sectional configuration which includes a pair of side portions that converge to a joint forming apex, the opposite terminal portions thereof curving outwardly to form concrete radiusing flanges. Facing opposite the joint forming apex is a substantially flat guiding surface which extends laterally across between the opposite radiusing flanges thereof. A shank carrying the handle extends upwardly and rearwardly from the rear end of the former in supporting relation thereto.
Description
VERTICAL CONTROL JOINT GROOVER
FOR CONCRETE ONSTRUCTIONS
I. DESCRIPTION
BACKGROUND OF THE INVENTION
Control joints in concrete slabs provide for differential movement in the various planes thereof, and are used to allow for contraction caused by drying shrinkage therein. If no control joints are used in slabs on the ground or in lightly reinforced walls, random cracks will occur when drying shrinkage produces tensile stresses in excess of the concrete's tensile strength.
There is a definite need for a method and/or device for efficiently providing a desired vertlcal control joint to the vertical face of various concrete constr~uctions, such as concrete steps, curbs; slabs, etc.
The conventional~ way of constructing concrete structures is to first build a wooden form in the shape and dimensions of the desired concrete construction. Into such a form the concrete i3 poured while still in soft condition, the concrete taking the shape of the form's interior, which is the desired shape, and thereby defining the concrete construction.
~s the concrete commences to set and harden, the horizontal upper edges thereof ~are radiused with conventional tools, while the vertical faces thereof are relatively inaccessible because of the presence of the surrounding wooden orm. If any joints are to be formed in the top surface of the concrete slab within the form, such are induced in the upper surface of the slab as it hardens. The horizontal edges of the concrete slab are radiused with a conventional radiusing tool just prior to the hardening of the concrete slab.
only when the slab has hardened sufficiently to maintain its desired form, can the wooden form be removed It is at this point thak the wooden form is conventionally removed and thereafter the attempts to groove the vertical control joints into the vertical faces of the concrete construction are made.
~t this point, the concrete is necessarily fairly well hardened and it is difficult, if not virtually impossible to shape all of the vertical control joints before they have reached a degree of hardness such that they are no longer readily shapable. This is particularly true when difficultly is experienced with one of the vertieal control joints because of a rock or other form oE
aggregate being located at that very spot, which requires removal or repair work. By the time such repair work on one of the control joints is completed, the remainder of the concrete construction has frequently hardened to a condition which makes proper repair or shaping of the remaining control joints impossible. As a consequence, shaping vertical control joints into concrete constructions such as concrete slabs, steps and curbs is a diEficult and reoccurring problem which is difficult, time-consuming, and expensive to ovexcome, and often results in an unsatisfactory and ill-appearing vertical face.
My new vertical grooving tool obviates the problem frequently experienced when the concrete along the vertical face of a concrete construction becomes too hard to be properly shaped with vertical control joints therein, because one of the other vertical joints was difficult to properly shape or repair. My invention is designed to overcome this problem and to solve it in a practical, inexpensive, and superior manner, so that the resultant product is superior in construction and appearance and is less expensive and time-consuming as compared to those formed through the use o~ conventional methods and grooving devices.
BRIEF SUMMARY OF THE INVENTION
My new vertical groover is constructed so that it can be used in a practical manner to shape vertical control joints into the ~vertical face of concrete constructions such as curbs, slabs and steps while the wooden form surrounding the concrete construction is still in place. As such, the vertical control joints can be formed in the concrete construction while the concrete is still in a sufficien~tly soft and shapeable condition so as to cause the concrete to readily shape to its desired orm.
My vertical groover is an elongated at least semi-rigid forming blade or former which is generally triangularly shaped in cross-section and elongated so that it can be inserted downwardly between the concrete construction and the wooden for~i which surrounds the same.
The generally triangular shaped former is deined by a pair of opposite side portions which extend angularly relative to each other and converge at their lower terminal portions to define a ~oint-forming apex that extends the length of the former. The upper terminal portion of each side portion curves slightly outwardly to deEine a concrete radiusing flange which runctions to radius the respective outer corner o the vertical control joint which is formed thereby. This provides an attractive, finished look to the vertical control joint.
Facing opposite the joint forming apex, and spaced therefrom, is a substantially flat guiding surface which extends between opposite radiusing flanges of the tool. Each radiusing flange tapers smoothly into the flat guidin~ surface of the former so as to provide a finished appearance and avoid unsightly ridges in the resulting concrete construction.
The forward end of the former, which is inserted downwardly into the concrete construction, is beveled so as to define a forward parting edge which aids in the tools insertion within the concrete by causing the concrete to spread as the tool is inserted therein.
Cantilevered from the rear end of the vertical control joint former is a shank carrying a handle member, which may be easily gripped to provide insertion of the groover quickly and efficiently~ while the concrete is still in sufficiently soft and shapeable form.
Upon inserting the forward end of the former downwardly between the concrete construction and the vertical interior face of the wooden form surrounding the same, the flat guiding surface is disposed in abutting relation with the vertical ace of the form, and the joint forming apex extends inwardly into the concrete construction so as to part the same and form a vertical control joint while the concrete is still suficiently soft and shapeable. Upon inserting the tool between the wooden form and the concrete construction, the curved radiusing flanges of the former cause the outer corners of the vertical control~joint to have an attractive radiused appearance which lB aesthetically pleasing to the eye.
By moving the vertical groover up and down gently, tbe tool can be caused -to proceed to the lower end of the vertical face of the concrete construction, and the groover's joint forming apex can be caused to shape the vertical control joints in the concrete construction while the form remains in place. When this operation has been completed and each of the vertical control joints have been formed, the wooden form surrounding the concrete construction may remaln in place until the concrete has hardened to such an extent that the form may be removed without concern that the concrete faces may shift or otherwise alter their shape.
We have Eound that if this tool is applied and manipulated as described when the concrete has reached the appropriate degree of ~irmness, a well defined, attractive vertical control joint can be produced on the vertical face of concrete constructions such as curbs, slabs and steps. A substantial amount of time and effort are thereby conserved and the resultant product is much stronger and attractive than when formed in the conventional manner as heretofore utilized.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects and advantages of the invention will more fulIy appear from the Eollowing description, made in connection with the accompanying drawings, wherein like reference characters refer to the same or similar parts throughout the several views, and in which:
Fig. 1 of the drawings herein is a perspective ~0 view of a portion of a concrete slab which is encased with a standard type form, showing in phantom an example of a .
.
position where a vertical control joint may be necessary to prevent random cracks as a result of the contraction of the concrete caused by drying and shrinkage;
Fig. 2 i3 a perspective view of one of my new vertical groovers;
Fig. 3 is a front elevational view of one of my new vertical groovers;
Fig. 4 is a cross-sectional view of one of my new vertical groovers which forms a l/2 inch wide by l inch deep vertical control joint;
Fig. 5 is a cross-sectional view of one of my vertical groovers which forms a 7/8 inch wide by 3/4 inch deep vertical control joint;
Fig. 6 is a cross-sectional view o one of my vertical groovers which forms a 3/8 inch wide by 3/4 inch deep vertical control joint; and Fig. 7 is fragmentary horizontal sect`ional view taken through one of my new vertical groovers, and showing a cement slab with the form therearound with my vertical groover inserted so as to form a vertical control joint therein.
DETAI~ED DESCRIPTION OF THE INVENTION
As shown in Fig. 2-6 inclusive, my new vertical control joint grooving tool comprises a handle member 10 supporting a shank member; 11 which extends forwardly and downwardly therefrom and terminates in an elongated at least semi-rigid straight former 12 which extends .
forwardly therefrom a preferable distance of approximately twelve (12) inches, and which has a cross-sectional configuration which is generally triangular in shape~ The former 12 may be made of metal, plastic, or any other rigid or semi-rigid material.
~3 shown in Fig. 2, preferably the shank member 11 extends upwardly and rearwardly from the former 12 at approximately 110, and handle 10 extends upwardly and rearwardly from shank member 11 at an angle of approximately 50. Although not shown in the drawings, it is readily apparent that the shank member 11 and handle 10 may also project rearwardly from the former 12 in a plurality of other orientations, so long as the vertical groover may be gripped and used by a workman without disturbing the semi-hardened cement construction with his/her hand.
As shown in Figs. 4-6, the ~former 12 has a generally triangular cross-sectional shape which is defined by a pair of opposite side portions 13 and 14, which are disposed angularly to :one another and converge toward the bottom terminal portion:thereof to define a vertical control joint forming apex or edge 15 that extends throughout the length of former 12. The upper terminal portion of each side portion 13 and 14 are radiused so as to curve slightly outward and form small cement radiusing flanges 16 and 17, which provide attractive radiused outer cor~ers of the vert.ical control joints~formed thereby.
Facing opposite the joint forming apex 15, and spaced upwardly therefrom ~as illustrated in Figs. 2-6), is~a substan-tially flat guiding surface 18 which extends laterally across the groover 12 so as to interconnect the opposit~ radiusing flanges 16 and 17 theFeof. Each radiusing flange 16 and 17 is construc-ted so as to taper smoothly into -th~ flat guiding surface 18 of the former 12, thereby defining a fine finishing edge therebetween.
As shown best in Figs. 2 and 3, side portions 13 and 14 of groover 12 taper inwardly at the forward end 22 of former 12 to form a 4eveled concrete parting edge 19, which aids in separating the concrete as a tool is inserted therein.
Although it is conceivable to manufacture vertical groovers of this type in many different sizes and dimensions, Figs. 4-6 illustrate groovers which will form some of the more common sized vertical control joints.
Fig. 4 discloses a 1/2 inch wide by 1 inch deep former;
Fig. 5 discloses a 7/8 inch wide by 3/4 inch deep former;
and Fig. 6 discloses a 3/8 inch wide by 3/4 inch deep former. The width of former 12 is generally measured between points adjacent the central portion of -the radius o~ the opposite radiusing flanges L6 and 17. The depth of former 12 is measuxed between the flat guiding surface 18 and the joint forming apex lS thereof. -~, As illustrated best in Figs. 1 and 7, my vertical groover is intended for use with concrete constructions such~as slabs, curbs and steps, wherein the concrete C has been poured into an exterior form ~F and allowed to set until the concrete reaches a semi-hardened, but yet soft, pliable and shapeable condition.
As shown in Fig. 1, the horizontal control joint 20 may be formed by conventional means, but formation of a vertical control joint while the form is still intact and the concrete is relatively so~t is extremely difficult, given that the vertical ~ace of the concrete slab is inaccessible. ~ For illustrative purposes, the position of a desired vertical control joint is shown in phantom in Fig. `I, and designated as numeral 21.
As shown best in Fig. 7, in use, my tool is utilized by inserting, from above, the forward end 2Z
of the former 12 downwardly into the semi-hardened concrete slab C at point 21 immediately adjacent to the inside surface of form F. My vertical groover is orientated such that the flat guiding surface 18 of former 12 enters the concrete in abutting relation with the inside surface of form F, thereby causing the oppositely facing joint forming apex 15 to extend inwardly into the concrete slab C. ~s former 12 is inserted within the concrete, parting edge l9 at the forward end 22 thereof pushes the concrete aside so as to aid in the insertion of the tool.
The workman applying my vertical groover 9 while grasping its handle, can effect its entry without seriously disturbing the concrete by reciprocating -the tool gently in a vertical direction. The parting edge l9 will aid in the tool's entry, and as former 12 descends, the shapeable concrete is formed or shaped along its vertical face so as to define a vertical control joint therein. As described previously, and shown in Fig. 7, the resulting vertical control joint will have smoothly ~5 radiused outer corners~ 23 and 24 which give the resulting vertical control joint an attractive and aesthetically pleasing finished appearance~
Upon reaching the lower end of the vertical face of the concrete slab C, the former 12 may be withdrawn gently so as to allow the concrete to set, while retaining the vertical control join-t which has been efficiently formed therein. The result is a better and stronger finished product, wlth a better appearance.
.
As described previously, conventionally shaping such control joints could not be formed until after the concrete had sufficiently hardened to allow removal of the exterior forms therefor. At such time, the concrete has hardened to such an extent that oftentimes the workrnan must attempt to form such control joints with much haste, thereby leaving many vertical control joints inadequately formed and ill-appearing. Should repair work be necessary on any particular control joint, the time required therefor may jeopardize proper forma-tion of the remaining control joints which must necessarily be formed.
With my tool, the vertical control joints may be formed while the concrete is still soft and pliable, and while the form F remains in place. The tool may be inserted and worked between the form and concrete while it is still soft, thereby alleviating the necessity for mueh repair work and providing a better appearing, stronger and more finished product in the end.
:
It will, of course, be understood that uarious ~0 changes may be made in the form, details, arrangement and proportions of the parts without departing from the scope of the invention which comprises the matter shown and ::
described herein and set forth 1n the appended claims.
,' ;
.
FOR CONCRETE ONSTRUCTIONS
I. DESCRIPTION
BACKGROUND OF THE INVENTION
Control joints in concrete slabs provide for differential movement in the various planes thereof, and are used to allow for contraction caused by drying shrinkage therein. If no control joints are used in slabs on the ground or in lightly reinforced walls, random cracks will occur when drying shrinkage produces tensile stresses in excess of the concrete's tensile strength.
There is a definite need for a method and/or device for efficiently providing a desired vertlcal control joint to the vertical face of various concrete constr~uctions, such as concrete steps, curbs; slabs, etc.
The conventional~ way of constructing concrete structures is to first build a wooden form in the shape and dimensions of the desired concrete construction. Into such a form the concrete i3 poured while still in soft condition, the concrete taking the shape of the form's interior, which is the desired shape, and thereby defining the concrete construction.
~s the concrete commences to set and harden, the horizontal upper edges thereof ~are radiused with conventional tools, while the vertical faces thereof are relatively inaccessible because of the presence of the surrounding wooden orm. If any joints are to be formed in the top surface of the concrete slab within the form, such are induced in the upper surface of the slab as it hardens. The horizontal edges of the concrete slab are radiused with a conventional radiusing tool just prior to the hardening of the concrete slab.
only when the slab has hardened sufficiently to maintain its desired form, can the wooden form be removed It is at this point thak the wooden form is conventionally removed and thereafter the attempts to groove the vertical control joints into the vertical faces of the concrete construction are made.
~t this point, the concrete is necessarily fairly well hardened and it is difficult, if not virtually impossible to shape all of the vertical control joints before they have reached a degree of hardness such that they are no longer readily shapable. This is particularly true when difficultly is experienced with one of the vertieal control joints because of a rock or other form oE
aggregate being located at that very spot, which requires removal or repair work. By the time such repair work on one of the control joints is completed, the remainder of the concrete construction has frequently hardened to a condition which makes proper repair or shaping of the remaining control joints impossible. As a consequence, shaping vertical control joints into concrete constructions such as concrete slabs, steps and curbs is a diEficult and reoccurring problem which is difficult, time-consuming, and expensive to ovexcome, and often results in an unsatisfactory and ill-appearing vertical face.
My new vertical grooving tool obviates the problem frequently experienced when the concrete along the vertical face of a concrete construction becomes too hard to be properly shaped with vertical control joints therein, because one of the other vertical joints was difficult to properly shape or repair. My invention is designed to overcome this problem and to solve it in a practical, inexpensive, and superior manner, so that the resultant product is superior in construction and appearance and is less expensive and time-consuming as compared to those formed through the use o~ conventional methods and grooving devices.
BRIEF SUMMARY OF THE INVENTION
My new vertical groover is constructed so that it can be used in a practical manner to shape vertical control joints into the ~vertical face of concrete constructions such as curbs, slabs and steps while the wooden form surrounding the concrete construction is still in place. As such, the vertical control joints can be formed in the concrete construction while the concrete is still in a sufficien~tly soft and shapeable condition so as to cause the concrete to readily shape to its desired orm.
My vertical groover is an elongated at least semi-rigid forming blade or former which is generally triangularly shaped in cross-section and elongated so that it can be inserted downwardly between the concrete construction and the wooden for~i which surrounds the same.
The generally triangular shaped former is deined by a pair of opposite side portions which extend angularly relative to each other and converge at their lower terminal portions to define a ~oint-forming apex that extends the length of the former. The upper terminal portion of each side portion curves slightly outwardly to deEine a concrete radiusing flange which runctions to radius the respective outer corner o the vertical control joint which is formed thereby. This provides an attractive, finished look to the vertical control joint.
Facing opposite the joint forming apex, and spaced therefrom, is a substantially flat guiding surface which extends between opposite radiusing flanges of the tool. Each radiusing flange tapers smoothly into the flat guidin~ surface of the former so as to provide a finished appearance and avoid unsightly ridges in the resulting concrete construction.
The forward end of the former, which is inserted downwardly into the concrete construction, is beveled so as to define a forward parting edge which aids in the tools insertion within the concrete by causing the concrete to spread as the tool is inserted therein.
Cantilevered from the rear end of the vertical control joint former is a shank carrying a handle member, which may be easily gripped to provide insertion of the groover quickly and efficiently~ while the concrete is still in sufficiently soft and shapeable form.
Upon inserting the forward end of the former downwardly between the concrete construction and the vertical interior face of the wooden form surrounding the same, the flat guiding surface is disposed in abutting relation with the vertical ace of the form, and the joint forming apex extends inwardly into the concrete construction so as to part the same and form a vertical control joint while the concrete is still suficiently soft and shapeable. Upon inserting the tool between the wooden form and the concrete construction, the curved radiusing flanges of the former cause the outer corners of the vertical control~joint to have an attractive radiused appearance which lB aesthetically pleasing to the eye.
By moving the vertical groover up and down gently, tbe tool can be caused -to proceed to the lower end of the vertical face of the concrete construction, and the groover's joint forming apex can be caused to shape the vertical control joints in the concrete construction while the form remains in place. When this operation has been completed and each of the vertical control joints have been formed, the wooden form surrounding the concrete construction may remaln in place until the concrete has hardened to such an extent that the form may be removed without concern that the concrete faces may shift or otherwise alter their shape.
We have Eound that if this tool is applied and manipulated as described when the concrete has reached the appropriate degree of ~irmness, a well defined, attractive vertical control joint can be produced on the vertical face of concrete constructions such as curbs, slabs and steps. A substantial amount of time and effort are thereby conserved and the resultant product is much stronger and attractive than when formed in the conventional manner as heretofore utilized.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects and advantages of the invention will more fulIy appear from the Eollowing description, made in connection with the accompanying drawings, wherein like reference characters refer to the same or similar parts throughout the several views, and in which:
Fig. 1 of the drawings herein is a perspective ~0 view of a portion of a concrete slab which is encased with a standard type form, showing in phantom an example of a .
.
position where a vertical control joint may be necessary to prevent random cracks as a result of the contraction of the concrete caused by drying and shrinkage;
Fig. 2 i3 a perspective view of one of my new vertical groovers;
Fig. 3 is a front elevational view of one of my new vertical groovers;
Fig. 4 is a cross-sectional view of one of my new vertical groovers which forms a l/2 inch wide by l inch deep vertical control joint;
Fig. 5 is a cross-sectional view of one of my vertical groovers which forms a 7/8 inch wide by 3/4 inch deep vertical control joint;
Fig. 6 is a cross-sectional view o one of my vertical groovers which forms a 3/8 inch wide by 3/4 inch deep vertical control joint; and Fig. 7 is fragmentary horizontal sect`ional view taken through one of my new vertical groovers, and showing a cement slab with the form therearound with my vertical groover inserted so as to form a vertical control joint therein.
DETAI~ED DESCRIPTION OF THE INVENTION
As shown in Fig. 2-6 inclusive, my new vertical control joint grooving tool comprises a handle member 10 supporting a shank member; 11 which extends forwardly and downwardly therefrom and terminates in an elongated at least semi-rigid straight former 12 which extends .
forwardly therefrom a preferable distance of approximately twelve (12) inches, and which has a cross-sectional configuration which is generally triangular in shape~ The former 12 may be made of metal, plastic, or any other rigid or semi-rigid material.
~3 shown in Fig. 2, preferably the shank member 11 extends upwardly and rearwardly from the former 12 at approximately 110, and handle 10 extends upwardly and rearwardly from shank member 11 at an angle of approximately 50. Although not shown in the drawings, it is readily apparent that the shank member 11 and handle 10 may also project rearwardly from the former 12 in a plurality of other orientations, so long as the vertical groover may be gripped and used by a workman without disturbing the semi-hardened cement construction with his/her hand.
As shown in Figs. 4-6, the ~former 12 has a generally triangular cross-sectional shape which is defined by a pair of opposite side portions 13 and 14, which are disposed angularly to :one another and converge toward the bottom terminal portion:thereof to define a vertical control joint forming apex or edge 15 that extends throughout the length of former 12. The upper terminal portion of each side portion 13 and 14 are radiused so as to curve slightly outward and form small cement radiusing flanges 16 and 17, which provide attractive radiused outer cor~ers of the vert.ical control joints~formed thereby.
Facing opposite the joint forming apex 15, and spaced upwardly therefrom ~as illustrated in Figs. 2-6), is~a substan-tially flat guiding surface 18 which extends laterally across the groover 12 so as to interconnect the opposit~ radiusing flanges 16 and 17 theFeof. Each radiusing flange 16 and 17 is construc-ted so as to taper smoothly into -th~ flat guiding surface 18 of the former 12, thereby defining a fine finishing edge therebetween.
As shown best in Figs. 2 and 3, side portions 13 and 14 of groover 12 taper inwardly at the forward end 22 of former 12 to form a 4eveled concrete parting edge 19, which aids in separating the concrete as a tool is inserted therein.
Although it is conceivable to manufacture vertical groovers of this type in many different sizes and dimensions, Figs. 4-6 illustrate groovers which will form some of the more common sized vertical control joints.
Fig. 4 discloses a 1/2 inch wide by 1 inch deep former;
Fig. 5 discloses a 7/8 inch wide by 3/4 inch deep former;
and Fig. 6 discloses a 3/8 inch wide by 3/4 inch deep former. The width of former 12 is generally measured between points adjacent the central portion of -the radius o~ the opposite radiusing flanges L6 and 17. The depth of former 12 is measuxed between the flat guiding surface 18 and the joint forming apex lS thereof. -~, As illustrated best in Figs. 1 and 7, my vertical groover is intended for use with concrete constructions such~as slabs, curbs and steps, wherein the concrete C has been poured into an exterior form ~F and allowed to set until the concrete reaches a semi-hardened, but yet soft, pliable and shapeable condition.
As shown in Fig. 1, the horizontal control joint 20 may be formed by conventional means, but formation of a vertical control joint while the form is still intact and the concrete is relatively so~t is extremely difficult, given that the vertical ~ace of the concrete slab is inaccessible. ~ For illustrative purposes, the position of a desired vertical control joint is shown in phantom in Fig. `I, and designated as numeral 21.
As shown best in Fig. 7, in use, my tool is utilized by inserting, from above, the forward end 2Z
of the former 12 downwardly into the semi-hardened concrete slab C at point 21 immediately adjacent to the inside surface of form F. My vertical groover is orientated such that the flat guiding surface 18 of former 12 enters the concrete in abutting relation with the inside surface of form F, thereby causing the oppositely facing joint forming apex 15 to extend inwardly into the concrete slab C. ~s former 12 is inserted within the concrete, parting edge l9 at the forward end 22 thereof pushes the concrete aside so as to aid in the insertion of the tool.
The workman applying my vertical groover 9 while grasping its handle, can effect its entry without seriously disturbing the concrete by reciprocating -the tool gently in a vertical direction. The parting edge l9 will aid in the tool's entry, and as former 12 descends, the shapeable concrete is formed or shaped along its vertical face so as to define a vertical control joint therein. As described previously, and shown in Fig. 7, the resulting vertical control joint will have smoothly ~5 radiused outer corners~ 23 and 24 which give the resulting vertical control joint an attractive and aesthetically pleasing finished appearance~
Upon reaching the lower end of the vertical face of the concrete slab C, the former 12 may be withdrawn gently so as to allow the concrete to set, while retaining the vertical control join-t which has been efficiently formed therein. The result is a better and stronger finished product, wlth a better appearance.
.
As described previously, conventionally shaping such control joints could not be formed until after the concrete had sufficiently hardened to allow removal of the exterior forms therefor. At such time, the concrete has hardened to such an extent that oftentimes the workrnan must attempt to form such control joints with much haste, thereby leaving many vertical control joints inadequately formed and ill-appearing. Should repair work be necessary on any particular control joint, the time required therefor may jeopardize proper forma-tion of the remaining control joints which must necessarily be formed.
With my tool, the vertical control joints may be formed while the concrete is still soft and pliable, and while the form F remains in place. The tool may be inserted and worked between the form and concrete while it is still soft, thereby alleviating the necessity for mueh repair work and providing a better appearing, stronger and more finished product in the end.
:
It will, of course, be understood that uarious ~0 changes may be made in the form, details, arrangement and proportions of the parts without departing from the scope of the invention which comprises the matter shown and ::
described herein and set forth 1n the appended claims.
,' ;
.
Claims (14)
1. A vertical control joint forming device for use in forming concrete constructions, comprising:
(a) an elongated straight at least semi-rigid vertical control joint former having a forward end and rear end;
(b) a shank member connected to and cantilevered from said rear end of said former;
(c) a handle member connected to said shank member in supporting relation thereto;
(d) said former having a generally triangular cross-sectional shape throughout the length thereof which is defined by opposite side portions which extend angularly relative to one another and converge to form a lower joint forming apex, the upper portions of said sides being interconnected by a substantially flat guiding surface which faces oppositely of said joint forming apex, and is spaced therefrom.
(a) an elongated straight at least semi-rigid vertical control joint former having a forward end and rear end;
(b) a shank member connected to and cantilevered from said rear end of said former;
(c) a handle member connected to said shank member in supporting relation thereto;
(d) said former having a generally triangular cross-sectional shape throughout the length thereof which is defined by opposite side portions which extend angularly relative to one another and converge to form a lower joint forming apex, the upper portions of said sides being interconnected by a substantially flat guiding surface which faces oppositely of said joint forming apex, and is spaced therefrom.
2. The structure defined in Claim 1, wherein each of said opposite side portions have an upper terminal portion which is radiused outwardly to define a concrete radiusing flange on each side of said former.
3. The structure defined in Claim 2, wherein each of said concrete radiusing flanges taper smoothly into said guiding surface along a substantial portion of the length of said former.
4. The structure defined in Claim 1, wherein said forward end of said former is beveled to define a concrete parting edge.
5. The structure defined in Claim 4, wherein said forward concrete parting edge of said former is continuous with said joint forming apex.
6. The structure defined in Claim 1, wherein said shank member extends upwardly from said former and said guiding surface faces upwardly toward said shank member.
7. The structure defined in Claim 1, wherein said former is constructed and arranged to form a vertical control joint in the concrete construction which is within the range of approximately 3/4 inch to 1 inch deep.
8. The structure defined in Claim 1, wherein each of said converging sides of said former has an upper terminal portion which extends outwardly and forms a radiusing surface which has a radius of approximately 3/8 inch.
9. The structure defined in Claim 1, wherein each converging side of said former curves outwardly at a point adjacent said flat guiding surface to form a concrete radiusing flange associated therewith.
10. The structure defined in Claim 1, wherein the width of said former at a point adjacent but below said radiusing flanges is in the approximate range of 3/8 inch to 7/8 inch.
11. The structure defined in Claim 1, wherein said guiding surface faces upwardly and said handle member extends upwardly and rearwardly of said rear end of said former.
12. The structure defined in Claim 1, wherein said converging sides of said former taper together at said forward end thereof to form said concrete parting edge.
13 13. A method of forming a vertical control joint in a concrete construction, comprising the steps of:
(a) constructing an exterior form in the shape and dimensions of the desired concrete construction;
(b) pouring a concrete mixture within said form and allowing said concrete to set to a semi-hardened, shapeable condition;
(c) providing an elongated straight at least semi-rigid vertical control joint former with a handle member cantilevered from one end thereof, said former having a joint forming portion with an oppositely facing substantially flat guiding surface;
(d) gripping said handle of said former and inserting the opposite end of said former downward into said concrete at a predetermined position between said concrete and said form therearound, said former being disposed such that said guiding surface is in abutting relation with the inside surface of said form, and said joint forming portion is extending into said semi-hardened concrete;
(e) reciprocating said former vertically as necessary to define a vertical control joint in the vertical face of said concrete construction;
and (f) removing said former from between said concrete and said form therearound and allowing said concrete to finish setting until hardened.
(a) constructing an exterior form in the shape and dimensions of the desired concrete construction;
(b) pouring a concrete mixture within said form and allowing said concrete to set to a semi-hardened, shapeable condition;
(c) providing an elongated straight at least semi-rigid vertical control joint former with a handle member cantilevered from one end thereof, said former having a joint forming portion with an oppositely facing substantially flat guiding surface;
(d) gripping said handle of said former and inserting the opposite end of said former downward into said concrete at a predetermined position between said concrete and said form therearound, said former being disposed such that said guiding surface is in abutting relation with the inside surface of said form, and said joint forming portion is extending into said semi-hardened concrete;
(e) reciprocating said former vertically as necessary to define a vertical control joint in the vertical face of said concrete construction;
and (f) removing said former from between said concrete and said form therearound and allowing said concrete to finish setting until hardened.
14. The method as defined by Claim 13 where, in the step of providing a vertical control joint former, said joint forming portion has a generally triangular shaped cross-sectional configuration whereby opposite converging side portions define a joint forming apex which faces opposite and is spaced from said flat guiding surface, each of said opposite side portions curving outwardly at a point closely adjacent to said guiding surface, thereby defining a pair of concrete radiusing flanges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2063675 CA2063675A1 (en) | 1992-03-20 | 1992-03-20 | Vertical control joint groover for concrete construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2063675 CA2063675A1 (en) | 1992-03-20 | 1992-03-20 | Vertical control joint groover for concrete construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2063675A1 true CA2063675A1 (en) | 1993-09-21 |
Family
ID=4149478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2063675 Abandoned CA2063675A1 (en) | 1992-03-20 | 1992-03-20 | Vertical control joint groover for concrete construction |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2063675A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295726A (en) * | 2018-03-22 | 2019-10-01 | 河南水建集团有限公司 | Pointer |
-
1992
- 1992-03-20 CA CA 2063675 patent/CA2063675A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295726A (en) * | 2018-03-22 | 2019-10-01 | 河南水建集团有限公司 | Pointer |
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