ARRANGEMENT IN A TILTABLE FORM FOR CASTING

Description

[0001] The present invention relates to an arrangement in a tiltable form for casting walls in a horizontal position and tilting cast walls into a raised vertical position. The arrangement comprise a form having upper and lower form defining members and a tilting device mountable on a supporting structure for tilting the wall between the horizontal and the vertical position. The tilting device has a drive motor which by a transmission is connected to one end of a supporting leg whose other end is pivotally connected to the form for tilting it between the horizontal and the vertical position.

[0002] The arrangement of this type is known from USA-1,668,300.

[0003] The erection of concrete walls is normally carried out on the building site by mounting a vertical wall formwork where the wall unit should have its final position. This technique is very time-consuming, and places high demands on the stability of the form, since the casting pressure at the lower end of the wall unit may easily cause the form to be urged outwards. Thus this type forms must be reinforced by a close, lying framework; alternatively, use may be made of sturdy steel forms the handling of which requires access to lifting equipment in the form of cranes or the like. High demands are also placed on the tightness of the forms, in both the horizontal and the vertical direction. The slightest changes, which also normally occur at the joints of the form, will necessitate a costly aftertreatment in the form of grinding and/or filling.

[0004] One method of overcoming these problems is generally referred to as "tilt-up". This method means that the casting of the walls is effected in a horizontal position, whereupon the wall or walls are raised together with the form to a predetermined vertical position. This technique is advantageous in that problems linked with casting pressure and vertical form joints are overcome. Moreover, the casting operations are substantially facilitated in that casting can be effected in the same manner as for horizontal floor structures, i.e. it will not be necesssay to force concrete down in between two closely disposed wall formwork members or a considerable height, which often makes it difficult to obtain an acceptable surface because cavities are formed by air voids or along the form face without adhering mineral aggregate.

[0005] An obvious advantage inherent in horizontal casting is also gained when casting is carried out in the winter. The horizontal frame may easily be enclosed and heated from the underside.

[0006] The "tilt-up" methods hitherto used imply that the horizontally cast wall, after removal of the form, is erected in place by mechanical lifting devices or that the form is tilted to a vertical position before the form is removed. The latter method is preferable, since special lifting devices in the form of cranes of the like can be dispensed with. The positioning of the wall may be directly by means of the form, independently of other mechanical aids.

[0007] According to the invention arrangement is characterized in that the upper and lower form defining members are adjustable and in that the lower form defining members is pivotally connected to the supporting beam extending along the length of the form. The supporting beam is retractable to a position beneath the form. The form includes at least one pivotable hook which in the vertical position of the form and with the lower form defining member dismounted retains the cast wall in the form until the cast wall is mounted in place.

[0008] The invention will be described in greater detail hereinbelow with reference to the accompanying drawings. Fig. 1 shows from one end a tiltable form in a horizontal position for casting a wall. Fig. 2, in a projection corresponding to Fig. 1, shows the form when tilted to a vertical position for raising the wall cast in the form. Fig. 3 is a section taken along the line III-III in Fig. 1. Fig. 4 shows the form in Fig. 1 from above with working platforms disposed along the long sides thereof. Fig. 5 is a section taken along the line V-V in Fig. 4. Fig. 6 is a section taken along the line VI-VI in Fig. 4 and also illustrates a canopy over the form. Figs. 7 and 8 are sections taken along the lines VII-VII and VIII-VIII, respectively, in Fig. 6.

[0009] In Figs. 1-3, there is shown a tilting device 1 for tilting a form generally designated 2 between horizontal and vertical positions according to Figs. 1 and 2. The tilting device consists of a geared asynchronous motor 3 with a rotatably mounted threaded rod 4 driven by the motor, and of an angular supporting leg 5 which is pivotally connected at one end to a substantially centrally disposed form supporting beam 6 and at its opposite end pivotally connected to an attachment 7 with a nut 8 screwable on the threaded rod 4. The attachment 7 is slidably mounted by means of roller bearings 9 in a slide rail 10 which extends underneath the form 2 between the extreme points of support 11, 12 for the supporting leg 5.

[0010] The tilting device 1 is connected by mounting the motor 3 with the threaded rod 4 by means of bolts (not shown) on a floor structure 13 or like supporting structure at a location which permits the connection of the supporting leg 5 on the floor structure 13 to be moved to the point 11 which gives the form 2 a vertical position, see Fig. 2. The slide rail 10 is also fixed on the floor structure 13 by means of bolts.

[0011] As appears from Figs. 4-6, there is provided a working platform 14 adjacent a lower form defining member 15 pertaining to the form 2, the working platform 14 comprising a supporting beam 16, a railing 17 and the lower form defining member 15. The beam 16 is so arranged that it can be pressed in underneath the form 2 in its entire length. The posts 18 of the railing 17 and the post 19 of the member 15 are either pivotally connected to the supporting beam 16 so that they can be folded to a horizontal position and, together with the beam 16, be retracted to a position underneath the form 2, or mounted in yokes (not shown), such that they can be readily removed from the form 2 by hand. There is also provided a working platform 20 at an upper form defining member 21 pertaining to the form 2, the platform 20 comprising two rectangular flat bars 22, a railing 23 and the upper form defining member 21. The flat bars 22 are fixed to the form 2 by means of a rectangular tubular member 24 through which the two bars 22 extend in parallel from the railing 23 to the form defining member 21, and by means of a U-profile 25 mounted over the two flat bars 22 and clamping these bars against both the lower flange 26 of the member 21 and a rubber spacer 27 disposed underneath the rectangular tubular member 24 and having a thickness corresponding to the lower vertical flange height of the form defining member. Clamping action is produced by a bolt 28 which extends through the U-profile 25 and whose nut is tightened against the underside of the supporting beam 6. The connection of the flat bars 22 to the upper form defining member 21 is effected by laterally pressing the bars 22 against the vertical web 29 of the member 21. Thus, the upper form defining member 21 can adjust the height of the wall to be cast in that the flat bars 22 are moved inwards toward or outwards away from the form 2. The post 30 of the railing 23 is disposed between the bars 22 and locked by means of a throughbolt (not shown).

[0012] At the sides of the form 2, there is provided a vertical rectangular tube 31 at the upper end of which a circular tube 32 is rotatably mounted. A protective tarpaulin 33 is rolled on the tube 32 and when the weather is bad, or in the winter when heating is required, may be unrolled so as to cover the form 2 while allowing for working space.

[0013] The invention is applied in the following way:

[0014] The points of support 34 of the form 2 are set with respect to the inner face of the wall to erect. The form 2 is thereafter levelled by means of props 35 on the points marked out. To make it possible to set the form 2 as exactly as possible in a horizontal position, use is made of retractable legs 36 which are vertically adjustable by screwing along the two sides of the form. The length of the form is adjusted to the length of the wall by interconnecting two or more form modules. In principle, the wall length is therefore unlimited. Once the form has been levelled, the lower form defining member 15 is mounted and recesses, if any, for doors, windows, ventilation ducts etc. are provided for. The upper form defining member 21 is adjustable for different wall heights and normally remains in place between the casting events.

[0015] Core forms are so designed that the bottom 37 of the form 2 will be uneffected. The reinforcement may then be used. Elements to be embedded can be fixed, like core forms, with the aid of edge forms, reinforcement or by using core forms. At the lower portion of the form bottom, two pivotable hooks 38 are postioned within the form during the casting operation. The purpose of these hooks 38 is to retain the wall unit (not shown) in place in the form 2 as the lower form defining member 15 is being removed in connection with the mounting of the wall. The hooks 38 are pulled out of the wall unit as it is mounted in place and the form 2 is to be returned to the horizontal position.

[0016] If the wall is an external wall, reinforcing and casting are first effected, whereupon insulation is applied as well as an additional reinforcing layer before the external face is cast. In casting, use is preferably made of fluid concrete which is pumped in place. The external face may thereafter suitably be screeded off by a vibrating screed. If a structured external face is desired, it may easily be achieved by pressing in moulded surface material directly after casting.

[0017] The method described above makes it possible for two workers to cast and erect a conventional external cellar or external front wall in one day. This is effected by raising the form of the previous day in the morning, whereupon the form is cleaned and moved to the new casting site. In the afternoon, a fresh casting operation is then performed.

[0018] Before the form can be tilted to a vertical position, the lower supporting legs 36 are retracted and the lower form defining member 15 is dismounted. A strip of cement mortar in which the wall is to be mounted is thereafter laid.

[0019] When the form 2 should be tilted to a vertical position, the tilting device 1 is moved in underneath the form 2. The motor 3 with the associated slide rail 10 is bolted to the floor structure 13 in the manner indicated above. The supporting leg 5 pivotally connected to the slide rail 10 is pivotally mounted at its other end, as previously mentioned, on the form 2 at the form supporting beam 6 in a substantially central position with respect to the form.

[0020] The motor 3 is thereafter started, whereby the threaded rod 4 is caused to rotate, and the nut 8 on the attachment 7 will be screwed towards the motor 3. This will cause the attachment 7 mounted in a roller bearing to start sliding in the slide rail 10, whereby the form 2 is urged upwards by the angular supporting leg 5. When the form 2 has come to a vertical position, the leg 5 has slid to the point of support 11, or extreme postion, adjacent the motor, which limits the sliding movement. Simultaneously, a strut 39 between the bottom 37 of the form 2 and the supporting leg 5 will prevent the form from tilting over.

[0021] When the form 2 is to be returned to a horizontal position, the motor 3 is activated in such a manner that the threaded rod 4 is rotated in the opposite direction, whereby the leg 5 will return to its initial position adjacent the extreme position or point of support 12.

[0022] When the form 2 has assumed its predetermined vertical position, the bolt attachments 40 anchoring the wall unit to the form 2 are removed and the two pivotable hooks 38 having prevented the wall unit from sliding out of the form are extracted, whereupon the forms can be removed. Temporary struts may thereafter be mounted at the inside, which make it possible to accurately adjust the vertical position of the wall. These struts can be secured in an imbedded nut 41 which has served as an attachment for anchoring the form 2 to the wall unit during the erection thereof. If the wall is very long, such that it has been cast on several interconnected forms 2, the form modules are stripped one by one and gradually replaced by struts. The form 2 is thereafter moved on wheels 42 mounted thereon to a new casting site. This displacement may be performed by hand.

[0023] The wall units are finally adjusted and any superfluous screed is removed and any required filling up is carried out. When the wall unit has been fixed in place, the corner joints are cast. The joining together of the units may be effected by means of angle fittings or the like, when so required. Normally, horizontal loads on the wall are however taken up by the floor structures.

[0024] The present invention provides a more efficient and less expensive method for making vertical walls in a horizontal position. By the location of the supporting leg 5, the form 2 can be raised or tilted upwards by the use merely of very simple and inexpensive mechanical aids, without the risk of overturning. This will save substantial costs which are involved in the use of different mechanical devices in the form of cranes or hydraulic devices on the form. As the form is equipped with wheels, it can be readily moved by hand to the location on the floor structure or other supporting structure where it should be used.

[0025] The invention can be used within a very vast field, for instance for external front walls, external cellar walls and internal walls for residential buildings, office buildings, industrial and administration buildings.

Claims

1. An arrangement in a tiltable form for casting walls in a horizontal position and tilting said cast walls into a raised vertical position, comprising a form (2) having upper and lower form defining members (21, 15) and a tilting device (1) mountable on a supporting structure (13) for tilting said wall between said horizontal and said vertical position and having a drive motor (3) which by a transmission (4, 7, 10) is connected to one end of a supporting leg (5) whose other end is pivotally connected to the form (2) for tilting it between the horizontal and the vertical position, characterised in that the upper and lower form defining members (21, 15) are adjustable and in that said lower form defining member (15) is pivotally connected to a supporting beam (16) extending along the length of the form (2), said supporting beam (16) being retractable to a position beneath the form (2), and in that said form includes at least one pivotable hook (38) which in the vertical position of the form and with the lower form defining member (15) dismounted retains the cast wall in the form (2) until said cast wall is mounted in place.

2. Arrangement as claimed in claim 1, characterisedin that said supporting beam (16) defines a first support structure for a first working platform (14) and a railing (17) and said upper form defining member (21) is displaceable connected to flat bars (22) movable connected to a second working platform (20) to adjust the height of the wall to be cast.

3. Arrangement as claimed in claim 1 characterisedin that the drive motor consists of a geared asynchronous motor (3) with a rotatably mounted threaded rod (4) driven by the motor, and that the angular supporting leg (5) at one end is pivotally connected to the form (2) between the upper and lower members (21, 15) and at the other end is pivotally connected to an attachment (7) with a nut (8) screwable on the threaded rod (4), the attachment (7) being slidably mounted in a slide rail (10) which extends underneath the form (2) between the extreme points of support (11, 12) for the supporting leg (5).

Revendications

1. Dispositif de coffrage basculant destiné à couler des murs dans une position horizontale et à relever lesdits murs ainsi coulés à une position verticale redressée, comprenant un coffrage (2) possédant des éléments supérieur et inférieur (21, 15) de la paroi du moule, et un dispositif de basculement (1) qui se monte sur une structure porteuse (13) pour faire basculer ledit mur entre ladite position horizontale et ladite position verticale, et qui possède un moteur d'entraînement (3) relié par une transmission (4, 7, 10) à une extrémité d'une jambe de force (5) dont l'autre extrémité est articulée sur le coffrage (2) pour faire basculer ce dernier entre la position horizontale et la position verticale, caractérisé en ce que les éléments supérieur et inférieur (21, 15) de la paroi du moule sont réglables et en ce que ledit élément inférieur (15) de la paroi du moule est articulé à une poutre support (16) qui s'étend sur la longueur du coffrage (2), ladite poutre support (16) pouvant être rétractée dans une position située sous le coffrage (2) et en ce que ledit coffrage comprend au moins un crochet pivotant (3a) qui, lorsque le coffrage est dans la position verticale et alors que l'élément inférieur (15) de la paroi du moule est désassemblé, retient le mur coulé dans le coffrage (2) jusqu'à ce que le mur coulé soit monté en place.

2. Dispositif selon la revendication 1, caractérisé en ce que ladite poutre support (16) définit une première structure porteuse portant une première plate-ferme de travail (14) et en ce qu'un rail (17) et ledit élément supérieur (21) de la paroi du moule sont reliés de façon mobile à des barres plates (22) elles-mêmes reliées de façon mobile à une deuxième plate-forme de travail (20) pour régler la hauteur du mur à couler.

3. Dispositif selon la revendication 1, caracté risé en ce que le moteur d'entraînement est constitué par un moteur asynchrone à réducteur (3) complété d'une vis (4) montée rotative entraînée par le moteur et en ce que la jambe de force coudée (5) est articulée à une première extrémité sur le coffrage (2) entre les éléments supérieur et inférieur (21, 15) tandis qu'à l'autre extrémité, elle est articulée à une ferrure (7) munie d'un écrou (8) qui se visse sur la vis (4), la ferrure (7) étant montée pour coulisser dans une glissière (10) qui s'étend sous le coffrage (2) entre les points extrêmes du support (11, 12) qui porte la jambe de force (5).

Ansprüche

1. Anordnung für eine neigbare Form zum Giessen von Wänden in einer waagerechten Position und Neigen der gegossenen Wände in eine aufgerichtete, senkrechte Position, welche Anordnung eine mit oberen und unteren formabgrenzenden Gliedern (21, 15) versehene Form (2) und eine Neigevorrichtung (1) umfasst, die zum Neigen der Wand zwischen der waagerechten und der senkrechten Position auf einem Traggerüst (13) montierbar und mit einem Antriebsmotor (3) versehen ist, der über eine Transmission (4, 7, 10) mit dem einen Ende eines Stützbeins (5) verbunden ist, dessen anderes Ende zum Neigen der Form (2) zwischen der waagerechten und der senkrechten Position mit der Form (2) gelenkig verbunden ist, dadurch gekennzeichnet,dass die oberen und unteren formabgrenzenden Glieder (21, 15) verstellbar sind, dass das untere formabgrenzende Glied (15) mit einem sich längs der Form (2) erstreckenden Tragbalken (16) gelenkig verbunden ist, wobei der Tragbalken (16) in eine Position unter der Form (2) einschiebbar ist, und dass die Form zumindest einen schwenkbaren Haken (38) aufweist, der in der senkrechten Position der Form und mit abmontiertem unterem Glied (15) die gegossene Wand in der Form (2) hält, bis die gegossene Wand an ihrem Platz montiert ist.

2. Anordnung nach Anspruch 1, dadurch gekennzeichnet,dass der Tragbalken (16) ein erstes, für eine erste Arbeitsbühne (14) und ein Geländer (17) vorgesehenes Traggerüst abgrenzt, und dass das obere formabgrenzende Glied (21) mit Flachstäben (22) verschiebbar verbunden ist, welche mir einer zweiten Arbeitsbühne (20) zur Einstellung der Höhe der zu giessenden Wand beweglich verbunden sind.

3. Anordnung nach Anspruch 1, dadurch gekennzeichnet,dass der Antriebsmotor ein Asynchron-Getriebemotor (3) mit einer vom Motor getriebenen, drehbar gelagerten Gewindestange (4) ist, und dass das winkelför mige Stützbein (5) am einen Ende mit der Form (2) zwischen den oberen und unteren Gliedern (21, 15) gelenkig verbunden ist und am anderen Ende mit einer mit einer der Gewindestange (4) aufschraubbaren Mutter (8) versehenen Befestigung (7) gelenkig verbunden ist, wobei die Befestigung (7) gleitend gelagert ist in einer Gleitschiene (10), welche sich unter der Form (2) zwischen den äussersten Stützpunkten (11, 12) des Stützbeins (5) erstreckt.

Drawing