US3874627A

US3874627A - Concrete mold form wale connector

Info

Publication number: US3874627A
Application number: US475142A
Authority: US
Inventors: Ronald R Vaught
Original assignee: Individual
Current assignee: Individual
Priority date: 1974-05-31
Filing date: 1974-05-31
Publication date: 1975-04-01
Anticipated expiration: 1992-04-01

Abstract

An L-shaped sheet metal connector body forms two right angle intersecting channel-like arms which receive and embrace the projecting ends of whale beams of a concrete molding form framework to be joined. An eccentric is pivotably mounted on each arm, to the side of the beam, for peripheral contact therewith. Rotation of the eccentric frictionally drives the beams toward the corner of the connector body to effect coupling and alignment. Rachet pins on the periphery of the eccentric facilitate frictional driving of the beam ends toward each other. A pivotable locking pawl mounted adjacent to the cam locks the eccentric in a position where the large radius portion of the eccentric which facilitates longitudinal movement of the beam ends relative to each other then presses the beam ends forcibly against the opposite sidewalls of arms to give rigidity and maintain alignment of the mold form framework.

Description

[ 51 Apr. 1, 1975 Vaught 1 CONCRETE MOLD FORM WALE CONNECTOR [76] Inventor: Ronald R. Vaught, Jourdanton, Tex.

[22] Filed: May 31, 1974 [21] Appl. No.: 475,142

[52] US. Cl. 249/219 W, 52/752 [51] Int. Cl. Fl6b 7/04 [58] Field of Search 52/758 H, 753 D, 753 C, 52/656, 698, 699, 751, 752; 403/231; 249/219 W, 190, 191; 269/41 [56] References Cited UNITED STATES PATENTS 2,931,129 4/1960 Boniface.... 52/752 X 3,066,962 12/1962 Koehler 249/194 UX 3,456,973 7/1969 Peter 52/758 H 3,468,573 9/1969 Peter 52/758 H 3,572,787 3/1971 Timmerman... 52/758 H 3,771,757 11/1973 Black 249/219 W Primary Examiner-Werner H. Schroeder Assistant Examiner-Wayne L. Shedd Attorney, Agent, or FirmRobert G. McMorrow [57] ABSTRACT An L-shaped sheet metal connector body forms two right angle intersecting channel-like arms which receive and embrace the projecting ends of whale beams of a concrete molding form framework to be joined. An eccentric is pivotably mounted on each arm, to the side of the beam, for peripheral contact therewith. Rotation of the eccentric frictionally drives the beams toward the corner of the connector body to effect coupling and alignment. Rachet pins on the periphery of the eccentric facilitate frictional driving of the beam ends toward each other. A pivotable locking pawl mounted adjacent to the cam locks the eccentric in a position'where the large radius portion of the eccentric which facilitates longitudinal movement of the beam ends relative to each other then presses the beam ends forcibly against the opposite sidewalls of arms to give rigidity and maintain alignment of the mold form framework.

8 Claims, 3 Drawing Figures 1 CONCRETE MOLD FORM WALE CONNECTOR BACKGROUND OF THE INVENTION l. FIELD OF THE INVENTION This invention relates to connectors for aligning and locking concrete form frame members together and at a given angle, with respect to each other, and more particularly, to an improved lockable whale connector for locking the protruding ends of concrete form whale beams together.

2. DESCRIPTION OF THE PRIOR ART In the building construction industry, concrete molding forms must be set up prior to pouring of the concrete and dismantled after the concrete hardens, and in many cases, the concrete forms are re-used. Particularly, in high rise buildings, the forms are employed in identical fashion at each floor and are simply moved from floor to floor as the poured concrete sections harden. It is difficult to position the concrete forms, maintain the desired alignment, and permit ready connection and disconnection of the forms to each other, particularly where the sectional forms intersect to form the corners of the poured concrete building components.

Normally, the concrete mold form includes a wooden framework formed of 2 4s, or similar wooden beams, to which is attached plywood sides or the like to form a hollow mold cavity within which the concrete is poured. Where such concrete forms are employed in the formation of vertical concrete walls and the like, the framework consists essentially of vertical 2X4s, in the form of studs, connected to a number of horizontal 2X45, or whales, which are nailed or otherwise coupled to the studs at right angles to the studs. Attempts have been made to use right angle sheet metal connectors for coupling the projecting ends of the whales or horizontal beams together at the corners of the concrete mold formed thereby. Particularly, where the concrete forms are re-used and where the framework formed of the 2X45 may warp and the relative positions of the frame members may shift during use, it is difficult and sometimes impossible to align the intersecting projecting ends of the framework whales and to effectively couple the same together or to maintain a rigid framework.

SUMMARY OF THE INVENTION The present invention is directed to an improved whale connector for concretet forms or similar frarneworks which insures alignment of the beams and maintains the connection therebetween in a rigid but releasable nature. Each whale connector comprises an L shaped sheet metal body consisting of integral, intersecting arms, forming channels which embrace the ends of respective whale beams being joined. The arms include opposed planar sidewalls overlying respective sides of the beam with the beams slidably inserted therein and movable towards the apex of the arms. Rotatable eccentrics are carried on both arms externally of one of the sidewalls of the connector body and mounted for rotation about an axis at right angles to the longitudinal axis of the arms and with the periphery of the eccentric in frictional engagement with the sides of the beam ends. By rotation of the eccentrics, the beams are pressed against the opposed sidewalls of each arm and are frictionally driven longitudinally towards each other. A latching pawl is pivotably mounted for rota tion about an axis parallel to the pivot axis of the eccentric and adjacent thereto, the eccentric carries rachet pins circumferentially positioned about its periphery and the locking pawl includes a radial projection which contacts the eccentric periphery intermediate of the rachet pins to lock the eccentric against rotation to release the pressure exerted by the eccentric on the beam within its arm or to permit the beam to shift longitudinally, A removable eccentric operating handle is threadably coupled to the eccentric and extends radially of the periphery for rotating the eccentric through an are sufficient to create the locking force and to shift the beam longitudinally within a given arm. Preferably, the locking pawl takes the form of a disc with a first short radial projection facing the eccentric periphery and a second longer projection to the side of the first projection opposite the eccentric to act as a thumb actuator to release the eccentric by rotating the locking pawl in a direction such that the smaller projection moves away from the periphery of the eccentric.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a perspective view of a concrete mold form framework employing a plurality of the lockable whale connectors of the present invention for connecting the ends of the framework whale beams together.

FIG. 2 is an enlarged, partially exploded, perspective view of one of the lockable whale connectors employed in conjunction with the concrete framework illustrated in FIG. I.

FIG. 3 is a top plan view, partially cut away of a portion of one of the lockable whale connectors of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, the present invention has application to the creation of a concrete molding form of the type wherein a framework illustrated generally at 10, is formed by joining vertical and horizontal wooden beams, such as 2 4s to create intersecting walls. In this respect, the framework I0 is generally vertical and is formed of left and right hand portions which intersect. The framework comprises a plurality of ve rtical studs such as I2 formed of wooden 2 4s and to which is affixed at various vertical heights whales 14, also preferably formed of 2X4s, and wherein the projecting ends 16 and 16a of the whales for the respective left and right hand framework portions intersect at the corner of the framework. The whales 14 may be affixed to the studs 12 by nailing or the like. In order to achieve a concrete form framework whose sides are at right angles to each other and perfectly trued, the present invention makes use of individual, lockable whale connectors 18 for locking the projecting ends I6 and 16a of the whale beams together to form a corner for the framework at each whale location.

Reference to FIG. 2 shows in detail the make-up of the individual lockable whale connectors 18 and their manner of operation taken further in conjunction with FIG. 3. Each connector 18, is formed of a sheet metal body including

right angle arms

20 and 22, the arms defining beam receiving channels which are rectangular in cross section and have internal dimensions approximating the dimensions of the wooden beams forming whales 14. Each arm, therefore, is formed of a flat base 24, an outer sidewall 26, and an inner sidewall 28. Sidewall 28 opens as at 30, along the major portion of its length intermediate the ends of the arm, to make the connector as light weight as possible without affecting its capability to maintain alignment between and pressure on ends 16 and 16a of respective intersecting whales 14. An opening 32 of somewhat shorter length is formed within the outside sidewall 26 of each arm, and the base 24 is provided with a half moon shaped integral projecting portion 34 which overlies the opening 30 and extends outwardly beyond sidewall 26. A pair of tapped and threaded

holes

36 and 38 are provided on the projecting portion 34 of base 24 for each arm. Hole 36 receives the threaded end 40 of a bolt 42, the bolt 42 passing through a bore 44 within the locking cam or eccentric shown generally at 46. The eccentric 46 comprises essentially a circular disc with the bore 44 being eccentric to the axis of the disc. Thus, when the bolt 42 is threadably engaged within the tapped and threaded hole 36, rotation of the eccentric 46 causes its periphery 48 to move toward and away from opening 32. The periphery 48 of the eccentric 46 for each arm is provided with a plurality of radially projecting pins 50 at spaced circumferential positions and the diameter of the eccentric 46, the position of its pivot axis as defined by bolt 42 and the location of the tapped and threaded hole 36 is such that the rachet pins 50 protrude within opening 30 and engage the side of a given whale beam end 16 or 16a. The periphery 48 of eccentric 46 is also provided with a tapped and threaded hole 52 which extends inwardly to some distance and which receives the threaded end 54 ofa removable, eccentric operating handle or tool 56. Handle 56 is essentially a rod of a length sufficient to permit hand rotation of each eccentric for manual operation of the lockable whale connector 18. To the side of the eccentric 46, and mounted for rotation about an axis parallel to that of the eccentric, is a locking pawl indicated generally at 58 which is machined of metal in the form of a disclike body 60 including an axial bore 61. Bore 61 receives bolt 62 whose threaded end 64 is threadably received by the tapped and threaded hole 38 of the plate projecting portion 34. The locking pawl 58 is provided with a first relatively short radial projecting 66 to the side of the locking pawl facing the eccentric, and a second projection 68 which projects radially outwards of the pivot axis defined by bore 62 to a much greater extent, and is curved away from projection 66. The position of the two tapped and threaded

holes

36 and 38 with respect to each other, the diameter of the eccentric. the diameter of the locking pawl and the radial extent of the projection 66 determine the locking effect of the locking pawl relative to the eccentric 46.

In operation, the manner of effecting alignment of the whale projecting beam ends 16 and 16a and locking the whales together at their ends to define a corner to the framework 10, may be best seen by reference to FIG. 3. HO. 3 illustrates the beam end 16a within the channel arm 22 and being longitudinally movable therein. With the connector 18 embracing the ends 16 and 16a of the whales 14 of the respective left and right hand sections of the framework 10, the removable eccentric operating handle 56 is threaded into engagement with tapped and threaded hole 52 within the periphery 48 of the eccentric 46. The eccentric 46 is then rotated, FIG. 3, in a conterclockwise direction about its pivot axis as defined by bolt 42 and the pins 50 impinge against the side of the beam end 16a to force the beam end 16a to move towards the intersection of the two

arms

20 and 22 from right to left as indicated by arrow 72. During this counterclockwise rotation, the pins 50 move over the small radial projection 60 of the locking pawl 58, if the locking pawl 58 is maintained in the position shown. Further, during this movement, due to the eccentric pivot axis of the eccentric 46, its periphery 48 and thus the pins 50 projecting therefrom in moving into frictional contact with the side of the beam end may in fact penetrate the beam and at the same time force the beam laterally towards the inside of the arm. Further, the beam is moved longitudinally in the direction of arrow 72. The beam moves away from sidewall 26 and towards the opposite sidewall 28. If the small radial projection 66 is moved in between two of the pins 50, any attempt at retrograde movement, that is, clockwise rotation of the eccentric 46 and left to right movement of the beam end 16a within arm 22, such action is resisted by a pawl and rachet action between pawl radial projection 66 and the pins 50 which act as rachet teeth.

The action with respect to beam ends 16 at each connector location is identical thereto and the locking of the beam ends axially relative to their channel like

arms

20 and 22 as well as forcibly pressing each beam end 16 and 16a against the inner sidewall 28 of respective arms provides rigid resultant framework facilitating the creation of a rigid concrete form with perfectly trued and aligned intersecting and interconnecting framework sections. ln order to disengage the projecting beam ends 16 and 16a of the whales ]4, it is only necessary to press on the thumb operator 68 which results in a slight counterclockwise rotation of the eccentric 46, FIG. 3 for instance, thus releasing the pawl radial projection 66 from between the rachet pins 50, and the beam ends 16 and 16a may be slid longitudinally out from the channel like

arms

20 and 22 which receive the same and dismantling of the concrete molding may be readily accomplished. The connector body may be readily constructed of plate steel, and the eccentric locking pawl and handle may be formed of cold rolled steel stock, as desired.

While the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

What is claimed is:

l. A lockable whale connector for connecting and aligning the intersecting projecting beam ends of concrete molding form framework sections or the like, said lockable whale connector comprising:

a sheet metal body of L-shaped configuration having intersecting integral arms forming beam receiving channels of rectangular cross section,

an eccentric operatively mounted to the side of each arm for frictional peripheral contact with the side of the beam embraced by said arm;

whereby, rotation of each eccentric fictionally drives the beams axially within respective arms towards each other to effect proper alignment and positioning of the beams with respect to each other, while simultaneously pressing said beams against the sidewall of said arms opposite that carrying said eccentric.

2. The lockable whale connector as claimed in claim 1, further comprising: means for locking said eccentrics against rotation to prevent retrograde movement of the beam ends within respective guide arms.

3. The lockable whale connector as claimed in claim 1, wherein: each eccentric includes circumferentially spaced projections on the periphery of the same to insure frictional engagement between the said eccentric and said beam for respective arms.

4. The lockable whale connector as claimed in claim 2, wherein: each eccentric includes circumferentially spaced projections on the periphery of the same to insure frictional engagement between the said eccentric and said beam for respective arms.

5. The lockable whale connector as claimed in claim 2, wherein said means for locking said eccentric against rotation to prevent retrograde movement of the beam ends within respective guide arms comprises: a plurality of projections carried by the eccentric periphery at circumferentially spaced portions and a pivotable locking pawl mounted adjacent to said eccentric for pivoting about an axis parallel to the pivot axis of said eccentric and having a radial projection pivotal to a position between said projections, and wherein said radial projection of said locking pawl extends radially beyond the distance from the pivoted axis of the locking pawl to the periphery of the eccentric in a plane which includes the pivot axis of both said eccentric and said locking pawl.

6. The lockable whale connector as claimed in claim 5, wherein said locking pawl includes a second radial projection positioned to the side of the first projection away from the eccentric, and having a radius in excess of that of said first projection and acting as a thumb release for said locking pawl.

7. The lockable whale connector as claimed in claim 6, wherein: each arm is U-shaped in configuration including a base supporting laterally spaced inside and outside sidewalls, said outside sidewalls being provided with an opening intermediate its ends, said base including an integral projecting portion overlying said outside sidewall opening and extending outwardly from said sidewalls and said eccentric and said locking pawl are pivotably mounted to said base projecting portion such that the rachet pins project inwardly of said opening during rotation of said eccentric.

8. The lockable whale connector as claimed in claim 7, wherein: said eccentric includes a tapped and threaded hole extending inwardly from its periphery and an elongated rod having a threaded end is threadably received within said eccentric periphery hole and extends radially outward thereof away from said outside sidewall opening to permit manual rotation of said eccentric into beam locking position.

Claims

1. A lockable whale connector for connecting and aligning the intersecting projecting beam ends of concrete molding form framework sections or the like, said lockable whale connector comprising: a sheet metal body of L-shaped configuration having intersecting integral arms forming beam receiving channels of rectangular cross section, an eccentric operatively mounted to the side of each arm for frictional peripheral contact with the side of the beam embraced by said arm; whereby, rotation of each eccentric fictionally drives the beams axially within respective arms towards each other to effect proper alignment and positioning of the beams with respect to each other, while simultaneously pressing said beams against the sidewall of said arms opposite that carrying said eccentric.