US2304851A - Adjustable form - Google Patents

Description

1942- M. SCHLATTER ETAL ADJUSTABLEIEFORM Filed Aug, 26, 1959 Moses 50/44 77519 and Patented Dec. 15, 1942 UNITED STATES PATENT OFFICE ADJUSTABLE? FORM Application August 26, 1939, Serial*No.'292,083' 8 Claims. (01. 25-131) This invention relates to a form for moldin Walls of cementitious' material such as concrete. It is the usual practice to construct forms of wood, in which concrete walls are molded, and inmany cases the walls must be formed with a chamber Within the Wall.

Metal forms have also been used involving the use of' outside form plates or units without corepl'ateswhere the wall is'to be a solid wall, but such metal forms often include core-plates that are held in position between the outside plates so as to form a wall of two separate slabs.

The general object of this invention is to provide a form, the units of which are adapted to be constructed of metalplates, and to provide the same with means whereby theform can be readily adapted to produce Walls of different thicknesses; also to provide a form construction including core-plates with means for readily setting the same in a fixed position between the side plates of the form.

The ordinary methods employed for setting'up Wooden or metal forms, consume a considerable amount of time; and one of the objects of this invention is to provide a form of a very simple construction, which can be very quickly set up, and at the same time, so constructed as to enable the thickness of the wall to be adapted to" special requirements.

In molding solid walls it is necessary to hold the mold walls apart ready to receive the concrete. One of the objects of our invention is to provide simple means for accomplishing this without necessitating the use of spacers in the mold space.

A further object of the invention is to provide a form of this kind with very simple means-for enabling the core-plates to be set in position between the outside plates, and also to provide very simple means for holding the core-plates in ad'- justed position between the side plates.

In the preferred embodiment of the invention, core spacer means are provided in connection with the core-plates, in the form of substantially vertical core spacer-bar that are carried by one.- or the other of the opposed core-plates; and one of the objects of the invention is to provide simple means for rotating the core spacer means to set the same in their active positions to hold the core-plates spaced apart; also to provide the core spacer members with simple means for locking the same in active position.

Further objects of the invention will appear hereinafter.

The invention -consists inthe novel parts and combination of parts to be described hereinafter,-

are slid in position' from above.

all of which contribute to produce an efiicient adjustable form.

A preferred-embodiment of the invention is described in the following specification, while the broad scope'of theinventionis pointed outin the appended claims.

In the-drawing: I

Fig; 1 is3a fragmentary perspective with certain partsbroken away, and illustratingour form set up on a' wall that is being constructed with the san'iel In -t-hisview certain parts are broken away for the sakeof clea-rness.

Fig. 2- isa-verticalsection taken through the lower portion of awall and illustrating our form setup on the same and readyfor pouring the upper'portionof the wall: Figs. 1- and 2 illustrate theform constructed to produce a hollow'wall.

Fig; 3 is a horizontal" cross-section illustrating a port-ion'of a form and aportion of asolid wall betweeii'tl'i'e'same.

Before pro'ceeding to a more detailed description of the invention, it should bestated that in practicing the invention,- we provide outer side plates that are supported in parallel'relation. If the wall is-to bea solid'wall, we give these side plates-a" special construction" to enable them to cooperate with tie-bolts to maintain the side plates -in a-fixed relation to-each other,-and at any'des'ired distance apart. This adapts the apparatus for forming a wall ofany desired thickness;

I-f-the-iorm is'to be-eniployed'for' making hollow walls; we provide ai-speciai construction involving, heuse-o'f-core-plate hangers that are set up in 'positienbetweenthe side plates, and these hangers'operateas guides forthe core-plates that After this is done, spacer means carried by the core-plates, ar -oper'at'd'at intermediate points along the lengthofthe wall so'as to spread the core-plates apart and 'hold them. against collapse.

Indoing this, cooperating means'dimits the spreading movm'erit o'fthe core-plates, and deterinines the thickn ess of th e wall slabs.

after the wan -hes been molded, the core spac'r's" reopera'ted 'to'permit the core-plates to toward each other} thereby enabling them to be readily removed} and after they have "been removed and also' the core-hangers, the outside pl'ates'th'atform' the"oute'r faces of the slabs, can bevery-qiiickly rmovedi One of the features of th"e'--- construction is that the 'movable handle which-is empleyedioroperating the core spacer means, can-also be employed to' lock th core plates' aga'in'st approaching" each other.

We shall first describe Figs. 1 and 2 that illustrate the construction of the form which is used for making a hollow wall. Referring to these figures, I and 2 illustrate two outside form units or plates. These plates are of substantially rectangular form, and are preferably formed with marginal flanges 3, and at intervalswith vertical flanges 4 that extend vertically across the plate bodies at intermediate points alongtheir length. In forming a wall, the outside plates I and 2 are set up in parallel relation and in horizontal tiers or sections. In Fig. 1 a partially constructed wall is illustrated, showing the completed lower portion 5 of the wall, and in front of this wallthe figure shows a lower tier of outside form units including sections 2a.. At suitable points the outside plates I and 2 are provided with aligning openings through which tie-bolts f such as the bolts 6 (shown in Fig. 1) are placed. Each of these bolts preferably has a head I on one end, and if desired may have threads 8 on the other end, capable of receiving a nut 9 if it is desired to employ a nut. In a complete form, a set of these bolts 6 would align with each other vertically as indicated in Fig. 2. This enables them to operate as a support for core-hangers I and II, said core-hangers preferably consisting of vertical bars formed with guiding means on their opposite edges for guiding core-plates I2 and I3. The core-hangers II are preferably constructed of tWo stout strips I4 with a longitudinal connecting strip I between the same, and in this way projecting flanges I6 are formed on each side, which form a guideway or slot I1 between the same, to receive the edges of the core-plates.

The opposite vertical edges of the core-hangers I0 and II are preferably provided with bayonet slots I8 having horizontal receiving throats and vertical bayonet extensions I9. This enables the hangers I0 and II to be hung on the tiebolts 6 as soon as the side plates have been fixed in position by the tie-bolts.

Associated with the tie-bolts 6, however, we

provide means for spacing the hangers I0 and I I with respect to their corresponding side plates. This means may be in the form of slightly tapered thimbles or cones that are slipped onto the bodies of the tie-bolts when they are being put in position (see Figs. 1 and 2). If these thimbles or cones are tapered, their large ends or butt ends are disposed toward the outside plates. These large ends abut up against the inner faces of the side plates and the inner ends abut up against the side faces of the hangers I0 and II.

After the hangers have been put in place in this way, the core-plates I2 and I3 are slid down into position, being guided in their descent by the guide grooves I1.

After the core-plates have been put in place in this way, they are then locked up; that is to say, they are secured in a fixed position, spread apart, and abutting forcibly against the inner ends of the thimbles or cone sleeves. In order to accomplish this, we prefer to provide certain of the core-plates with lock-up means carried on their inner faces. While it would be possible to provide these lock-up devices on the inner faces of all the core-p1ates,'we prefer to provide them only on one side of the form. For example, in Fig. 1, we illustrate one of these lock-up devices 2| as of points this spacer bar is provided with cam means. This cam means is preferably constructed by Welding short strips 24 of a bar like the bar 22, in alignment with each other, to the side of the bar 22. The lowermost of these pieces 24 is located under the lower bearing clip 23, and the uppermost one is located above the uppermost bearing clip 23. This secures the bar 22 in position. At the uppermost cam piece24the bar 22 is forged into'a head 25 for the attachment of a movable handle 26. This handle enables the bars or rods 22tobe rotated on their longitudinal axes, and the handle is preferably constructed so that after rotating the locking rods or bars 22 into their locking position, the handle 26 can be moved into a position to hold the plates I2 and I3 spaced apart. For this purpose the handle 26 is preferably of T-form, having a tongue 21 pivotally mounted in a.slot 28 in the head 25. The cross bar of the T operates as a handle'that can project above the upp r edgeof the plate as indicated in Fig. 1, enabling the bar 22' to be rotated. After the, bar has been rotated into its; locking position with the cams engaging the inner face of the opposite core-plate l3, the handle 26 can then be swung down on its pivotal 0on nection so that the ends of the cross bar of the T handle, are received against the inner faces of the core plates, as indicated at the rightin Fig. 1;;

As the wall is run up, the flanges 3 of the upper section of the formwould be supported oncorresponding flanges 29 on the lower sections 1 of the outside plates. Furthermore, as the courses of the wall are molded, reinforcingrods 30 are set in place andextend up through the wall slabs 3| and 32. v In order to secure the side plates 2 in any adjusted position on the tie-bolts 6, we prefer to provide the outer sides of the side plates with socket brackets 33, through which the end portions of the tie-bolts 6 project. Although these 33 are formed with slots 35 to receive clamping means such as wedges 36. The tapered edgesof these wedges come against the sides of the bolts, and when the wedges are driven up, they clamp the bolts securely inthe clips 33. The small ends of the wedges are preferably formed with" a slight twist 31 that prevents the wedges from falling out of the socket brackets 33 when, the forms are being knocked down or set up. In

' other words, each socket bracket 33 has a wedge carried on the inner faces of the core-plates l2, 7

Each of these lock-up devices preferably consists of a substantially vertical spacer bar 22 that is mounted for rotation in suitable bearings 23 on the inner face of the core-plates. At a plurality to vertical ribs 36 that becomes permanently. associated with it. In taking down the forms, the bolts' fi are first removed. They are used again in setting up the form. However, the slabs tied together, and this is preferably accomplished ateach course by means of a cross-tie such as the cross-tie 38 illustrated in Fig. 1. This crosstie is held in place by means of notches 39 in the lower ends of the hangers, and each of these cross-ties has a U-shaped body disposed in a horizontal position with upwardly extending spurs 40 that tie into the wall when the wall is completely molded. t In forming a solid wall 42 as indicated in Fig. 3, of course, no core-plates are employed, but merely two outside plates 43 and 44 which, however, are provided with socket brackets ,45 welded 46 and provided with slots similar to theslots 35 for receiving wedges"; In 1 3i and 32 must be setting up the form for either a solid wall or hollow wall, of course, the bolt head 48 seats against the outer side of one of these socket brackets 35, and the opposite plate 44 is pushed in on the bolt to give the wall 42 any desired thickness. Tln's plate M is then clamped up by means of its wedge ll. The wedges hold the outside plates spaced apart to receive the concrete. The nuts and bolt heads resist the pressure of the concrete and prevent the walls from spreading.

The vertical flanges of the outside form plates are, of course, provided with aligning holes 49 at which suitable means are provided for holding the form units in position, and for bracing them together by means of horizontal waler bars or stringers.

By reason of the fact that the butt ends of the distance sleeves or cones 2i] are located outwardly, it will be evident that they can be readily removed from the wall slabs after the form has been taken down.

It will be evident that a form. having these features of construction described, can be very quickly set up to form a wall of any desired thickness; and, furthermore, that the form can be very quickly taken down after the wall has been molded.

Many other embodiments of this invention may be resorted to without departing from the spirit of the invention.

What we claim is:

1. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of corehangers between the same having guide means for the adjacent edges of core-plates, means for holding said core-hangers fixed in a spaced relation, spaced from each other and from said side plates, and core-plates capable of sliding down into position with their edges guided in said corehangers.

2. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of core-hangers between the same having guide means for the adjacent edges of core-plates, spacer members between each side plate and its corresponding core-hanger, with means for supporting the same abutting against the corehangers, means for fixing the side plates in contact with the said spacer members so that the core-hangers will be held fixed and spaced from their corresponding side plates, hand-operated spacer means between the core-plates for holding the same apart; and core-plates with their edges guided in said core-hangers, and capable of being slid down into position between the side plates.

3. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of coreplates, means for supporting the same between the side plates, a core spacer-bar, means for rotatably mounting the same on the inner face of one of the core-plates, a pair of core-hangers between the side plates, having guiding means for receiving the adjacent edges of the core-plates, a tie-bolt passing through the said core-hangers and through the side plates, a handle movably attached to the upper end of the core spacer-bar for rotating the same into its active position, said core spacer-bar having means for engaging the opposite core-plate to hold the core-plates spaced irom each other, and spacers mounted on the tieebolts between the core-hangers and the side plates for-limiting the spreading movement of the core-hangers.

4. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of coreplates, means for supporting the same between the side plates, a core spacer-bar, means for rotatably mounting the same on the inner face of one of the core-plates, a pair of core-hangers between the side plates, having guiding means for receiving the adjacent edges of the core-plates, a tie-bolt passing through the said core-hangers and through the side plates, a handle movably attached to the upper end of the core spacer-bar for rotating the same into its active position, said core spacer-bar having'means for engaging the opposite core-plate to hold the core-plates spaced from each other, spacers mounted on the tie-bolts between the core-hangers and the side plates for limiting the spreading movement of the core-hangers, and means on the outer sides of the side plates for securing the same to the tie-bolts.

5. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of coreplates, means for supporting the same between the side plates, a core spacer-bar, means for rotatably mounting the same on the inner face of one of the core-plates, a pair of core-hangers between the side plates, having guiding means for receiving the adjacent edges of the 'coreplates, a tie-bolt passing through the said core-hangers and through the side plates, a handle movably attached to the upper end of the core spacer-bar for rotating the same into its active position, said core spacer-bar having means for engaging the opposite core-plate to hold the core-plates spaced from each other, spacers mounted on the tiebolts between the core-hangers and the side plates for limiting the spreading movement of the core-hangers, and clamping means carried on the outer sides of said side plates for engaging the tie-bolts to secure the side plates to the tiebolts. 7

6. In a form for molding cementitious material, the combination of outer side plates to be supported in parallel relation, tie-bolts connecting said side plates, means for securing the side plates to the tie-bolts, a pair of oppositely disposed core-hangers between the side plates having guiding means for receiving and guiding the adjacent edges of the core-plates, said corehangers having slots extending into the same from their side edges on the same side of their longitudinal axes, enabling the core-hangers to be moved laterally onto the said tie-bolts, core spacer means movably mounted on the inner sides of certain of said core-plates for giving a separating movement to the core-plates, and means mounted on the tie-bolts for limiting the separating movement of the core-plates to hold them in a predetermined position with respect to the side plates.

'7. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of coreplates, means for supporting the same between the side plates, a core spacer-bar, means for rotatably mounting the same on the inner face of one of the core-plates, a handle movably attached to the upper end of the spacer-bar to swing on a horizontal axis in a substantially vertical plane, and capable of swinging in a substantially horizontal plane on the longitudinal axis of the spacer-bar, for rotating the spacerbar on its longitudinal axis into its active position, said core spacer-bar having means for engaging the opposite core-plate to hold the spacer-bar locked, means for limiting the separating movement of the core-plates for maintaining them at a predetermined distance from the side plates, said handle operating to swing downward on its horizontal axis of rotation after the core spacer-bar has been rotated into its active position, and having a head to engage the core-plates, and cooperate with the same to maintain the core spacer-bar in its locked posi- ,tion.

8. In a form for molding walls of cementitious material, the combination of outer side plates to be supported in parallel relation, a pair of core-plates, means for supporting the same between the side plates, a core space'r bar', means for rotatably mounting the same on theinner face of one of the core-plates, a handle pivotally attached to the upper end of the core spacer-bar to swing on its pivotal axis in a substantially vertical plane, and capable of swinging in a substantially horizontal plane for rotating the spacer-bar on its longitudinal axis into its active position, said core spacer-bar having means for engaging the core-plates in a position to hold the same spaced from each other, means for limitingthe separating movement of the core-plates,

said handle operating to swing down on its piv-

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