GB2216584A

GB2216584A - Assembly of surfaces for the construction of concrete injection moulds

Info

Publication number: GB2216584A
Application number: GB8906412A
Authority: GB
Inventors: Christos Pafilis; Dimitris Pafilis
Original assignee: PAFILI INT TUBULAR SA
Current assignee: PAFILI INT TUBULAR SA
Priority date: 1988-03-28
Filing date: 1989-03-21
Publication date: 1989-10-11
Anticipated expiration: 2009-03-21
Also published as: GB2216584B; CY1645A; BE1003026A4; NL8900704A; PT90137A; CA1333955C; FR2664319B1; GB8906412D0; DK140789A; ES2016881A6; RU2038975C1; DK140789D0; FR2664319A1; GR880100192A; AU3169389A; AU625596B2; GR1000304B; PT90137B

Abstract

An assembly of surfaces for the construction of concrete injection moulds comprises a plurality of surface frames each consisting of a substantially planar surface (1 Fig 1.) having side members 2 projecting from one side around its periphery. The side members 2 are stiffened by cross-braces (3 Fig 1.) and are each provided with a series of holes 4 uniformly spaced apart from each other. The surface frames are mounted on bases 5, provided with similar holes 4, and are connected to the bases 5 and to each other by connecting angle pieces 10 having pins 11 projecting from both sides which are engageable in the holes 4 in the side members 2 and bases 5. The assembly may be used to form columns, walls, beams or other concrete structures. <IMAGE>

Description

Title: ASSEMBLY OF SURFACES FOR THE-CONSTRUCTION OF CONCRETE INJECTION MOULDS This invention relates to the construction of moulds for use in constructing buildings or building concrete works.

The conventional techniques of constructing concrete moulds comprise the use of planks or surfaces made from plywood or even metallic surfaces in some cases which are assembled via rafters, where the said surfaces are cut in predetermined dimensions, riveted and tightened by bracing fixings or wooden parts. This construction demands skilled labour, the consumption of a significant amount of materials, which are destroyed when dismantling takes place (wood, rivets, wires, etc.), and a considerable length of time for completing the construction.

The present invention aims to provide a technical method as well as the necessary fittings which overcome the above-mentioned problems of conventional techniques and at the same time reduce the construction costs of the concrete moulds which may be used in the building's construction and in every construction made of concrete, reinforced or not.

The invention further aims to improve the conventional methods by eliminating the current disadvantages of the materials which are incorporated in the concrete moulds construction.

Accordingly, the present provides an assembly of surfaces for the construction of concrete injection moulds, said assembly comprising surface-frames having side members provided with a series of holes adapted to receive pins provided on connecting angle pieces.

By means of the assembly according to the invention, the construction of concrete injection moulds of metallic, plastic or wooden surfaces is readily accomplished. The surface frames and connecting pieces enable a rapid construction of concrete moulds, which may have any shape or dimension. Therefore, there is no further demand for riveting, cutting planks or other wooden surfaces, using bracing fixings or employing skilled labour.

Further advantages of the invention are the time saved during the construction of the mould, the avoidance of the frequent weaving out of the moulding materials and the quick, easy and inexpensive dismantling of the moulds by unskilled labour.

The forming surfaces of the moulds may carry on one side vertical plastic or wooden members assembled on the perimeter of the surfaces. The said members are provided with the holes which are spaced at the same or any preferred. distance.

By means of the pins on the connecting angle pieces, the surfaces are joined rigidly to each other providing, at the same time, the flexibility to construct moulds of any size and dimension. The use of a one size surface frame is sufficient for constructing differently dimensioned moulds. The great advantage of the said surface-frame, combined with the side members and their holes, is that by using a one size surface-frame, one may construct moulds of shores, beams, walls or other shapes which may have different dimensions.

A metallic, plastic or wooden fitting, in a beam form, having a series of holes corresponding to the holes in the side members of the surface frames, forms a supporting base for the assembly which can be placed on the ground.

The assembly according to the invention may further include a joining element provided with a series of holes corresponding in dimensions and spacing to the holes in the surface frames. Each joining element may comprise a metallic, plastic or wooden substantially planar surface and the holes are desirably provided in members extending from one side of the surface around the periphery thereof. The members extending along the longer sides of the surface are desirably interconnected by transverse stiffening members. Preferably, each stiffening member is provided with a hole adapted to receive a metal rod for bracing a wall constructed from one set of surface-frames to a second wall constructed from another set of surface-frames. By this means, there is no need for conventional fittings such as fixings, wires and the like to join the parallel walls.

The invention also extends to a surface for the construction of concrete injection moulds, said surface being mounted on a frame adapted to be connected to a similar frame of at least one like surface, the frame being provided on one side of said surface and including vertical members provided with a series of holes adapted to receive pins provided on connecting angle pieces.

The invention will now be further described, by way of example, with reference to the drawings, in which: Figure 1 is a perspective view of one embodiment of a surface-frame for an assembly according to the invention; Figure 2 is a perspective view of a base for supporting the surface-frame shown in Figure 1; Figure 3 is a perspective view of a joining element for joining surface-frames in a lateral manner in order to construct a surface such as a wall along its height and its length; Figure 4 is a perspective view of a connecting angle piece with pins protruding from each side for the purpose of connecting together and bracing the surfaceframes in a vertical manner; Figure 5 is a plan view of the angle piece shown in Figure 4; Figure 6 is a part-sectional side elevation of the angle piece shown in Figures 4 and 5;; Figure 7 is a partly sectioned side elevation of a modified form of angle piece having a pin projecting from only one side; Figure 8 is a plan view of a hook having a pin which is receivable in a hole in a surface-frame and serving to support an end of a supporting tube; Figure 9 is a perspective view of the hook shown in Figure 8; Figure 10 is a side elevation of the hook shown in Figures El and 9; Figure 11 is an exploded perspective view of an assembly of surface-frames and other fittings for the construction of a mould for the formation of a concrete column; Figure 12 is a perspective view of an assembly of surface-frames and other fittings for the construction of moulds for the formation of two concrete columns, one being shown in the completed stage and the other in the process of being assembled;; Figure 13 is a perspective view of an assembly of surface-frames and other fittings to form a mould for casting a wall of concrete; Figure 14 is a perspective view of a metal rod having a head at one end and encircled by a tube of plastics material; and Figure 15 is a vertical section through a cast concrete beam cast in a mould formed by an assembly of surfaceframes and other fittings according to the invention.

In the drawings, like parts are denoted by like reference numerals.

Referring to the drawings, the main component for forming an assembly according to the invention comprises a frame which, as shown in Figure 1, consists of a surface 1 which may be made of iron plate or plywood sheet. On one side of the surface 1, around its periphery, the surface carries vertical members 2.

These members may be welded, riveted or formed by pressing the sheet of the surface 1. The members 2 incorporate holes 4 along their length. The space between the holes 4 is indicatively fixed at 5 cm intervals (from the centre of one hole to the next), taking into consideration that in most of the existing structures, columns, shores, beams, walls, the intervals are at 5 cm spacing. Nevertheless, the spacing between tne holes may be greater or less than 5 cm. On the side of the surface 1 on which the members 2 are mounted, vertical bulkheads 3 are assembled between the members 2. These bulkheads 3 support both the surface 1 and the members 2. Illustratively one dimension of the surface-frames is within the range of 50 cm - 80 cm which can serve the normal structures of shores and beams but the construction of surface-frames of any magnitude is also possible. The advantage of this invention is that the use of a one-size frame makes the construction of moulds for pipes, walls and beams of different dimensions feasible. The spaces between the holes 4 of the side members 2 correspond to the spaces between pins 11 provided on connecting angle pieces 10 (see Figures 4 and 5).

The assembly further includes bases, such as the base 5 shown in Figure 2, which serve to support the surfaceframes 1 in the construction of moulds. The base 5 may be made of metal, plastics or wood and takes the form of a beam having an upper surface which is substantially rectangular and in which holes 4 are provided at the same spacing as in the members 2.

The surface-frames may be connected together by joining elements (Figure 3) each of which consists of a surface 9 having on one side around its periphery members 6 with holes 4 (identical to the holes in the members 2). The members 6 are braced by a number of stiffening members 7. The joining element, is connected to the surfaceframes 1 by means of the tightening keys 12 which are passed through aligned holes 4 in adjacent members 2 and 6 thereby connecting the members and the associated surfaces 1 and 9 together. The surface frames are connected to the base 5 by means of the connecting angle pieces 10 with the pins 11 thereof being inserted in the holes 4 in the upper surface of the base 5 and in the corresponding holes 4 in the members 2 of the surfaceframes.

The holes 4 in the members 6 may be at 5 cm intervals or intervals of different dimensions, Figure 3, in such a way that they function in the same way by providing the same joining potential as the holes 4 in the members 2 of the surface-frames shown in Figure 1. In addition to enabling the surface-frames to be assembled on top of one another, the connecting angle pieces 10, which may be made of thin metal or plastics, are L-shaped to permit the surface frames to be connected together at right angles to each other. The connection is attained by inserting the pins 11 in the holes 4 in the members 2 of both of the lower surface 1 and the upper surface 1 or in the upper or lower members 2 of adjacent surface frames to form a right angle between surfaces 1. The pins 11 are spaced apart by the same distance as the distance between the holes 4.

By way of illustration, Figure 11 shows the application of the connecting angle pieces 10 in the joining of surface-frames in a box-like configuration which are intended to be mounted on the bases 5. As shown in Figure 11, the connecting pieces 10 serve to connect the bases 5 to each other and enable the surface-frames to be mounted on the connected bases and further surfaceframes to be mounted on the lowermost tier in order to form a mould for a column. Modified connecting angle pieces 13 having pins 11 on only one side as shown in Figure 7 are used for joining the surface-frames at the upper end of the mould for the column.

For the onstruction of a mould for a column of any dimension four surface-frames of the same size are used.

At the lowest level, four bases 5 are placed in such a way that if the length or width of the column is less than the corresponding dimension of the base 5, the remaining part of the base protrudes in the direction of the corners as shown in Figure 11 In the same way, the surface-frames are assembled vertically in order that the length of the surface which is greater than the width of the column, protrudes in the direction of the corners again as shown in Figure 11. The joining of the first four surface-frames on the base is obtained by inserting the pins 11 on one side of four connecting angle pieces 10 in the holes of the bases 5 at the corners in order to connect the bases 5 together. The upwardly projecting pins 11 of these connecting pieces 10 are inserted in the holes 4 of the members 2 of the surface-frames and connect them together in order to form the first tier of the mould.The pins also serve to connect the surface-frames to the bases 5. Four other connecting angle pieces 10, with the pins 11 being inserted in the holes 4, are assembled over the first assembled tier, at the corners of the upper end. Above these connecting angle pieces four other surface-frames are assembled forming a second tier. According to the required height of the column, further surface-frames are similarly mounted in an upwards manner in the same way. The superposed surface frames are further connected together by tightening keys 12.

Figure 12 shows the construction of two moulds for parallel columns, as well as supporting scaffolding.

Figure 13 shows illustratively an assembly of surface frames according to the invention forming a mould for a wall. The surface-frames are joined together horizontally by means of the joining elements shown in Figure 3. The connection between the surface-frames and the joining elements is accomplished by connecting keys which are passed through aligned holes 4 in the frame members 2 and 6.

The closing of the wall mould at each end is attained by means of a surface-frame- which is joined to the surface frames at the associated end of the mould by connecting angle pieces 10 in the same way as the joints in the construction of the column mould shown in Figure 11.

In order to restrain the two parallel sides of the wall mould at the required distance, a series of plastics pipes 19 are placed between the two mould walls. Metal rods 20 are passed through holes 3 in the stiffening members 7 of the joining elements and through the plastics tubes 19. Each metal rod 20 has a head at one end and is supported and retained at the other end, which protrudes from the surface of the associated stiffening member 7, by a metallic butterfly clamp.

For restraining the mould walls on their outer sides, a horizontal scaffold pipe 18 is supported by hooks 17 at an appropriate height and diagonal buttresses 21 are connected to the pipe 18 or the horizontal pipes are supported on a scaffold 23. The hooks 17 are 'provided on crescent-shaped plates 15 each having a pin 16 which is insertable in a respective hole 4 in the frame members 2 and 6.

Figure 15 shows an illustrative structure of a mould with two beams at its end. The mould is constructed with the same surface-frames and in the same manner as the moulds for the columns are constructed, where the surfaces 1 are adapted to the required dimensions.

It should be noted that the invention is not restricted to the above-described and illustrated embodiments and changes or modifications to the shape, form, dimensions, materials, construction fittings and the assembly fittings may be made without departing from the scope of the present invention.

Claims

1. An assembly of surfaces for the construction of concrete injection moulds, said assembly comprising surface frames having side members provided with a series of holes adapted to receive pins provided on connecting angle pieces.

2. An assembly according to claim 1, wherein said assembly further includes bases for the surface frames, each said base having a series of holes arranged to align with the holes in said side members and adapted to receive said pins.

3. An assembly according to claim 1 or claim 2, wherein said assembly further includes a joining element provided with a series of holes with diameters and space intervals corresponding to the. holes in the surface frames.

4. An assembly according to claim 3, wherein the joining element comprises a substantially planar surface and wherein the holes are provided in members extending from one side of the surface around the periphery thereof.

5. An assembly according to claim 4, wherein the members extending along the longer sides of the surface are interconnected by stiffening members.

6. An assembly according to claim 5, wherein each stiffening member is provided with a hole adapted to receive a metal rod for bracing a wall constructed from one set of surface frames to a second wall constructed from another set of surface frames.

7. An assembly according to any preceding claim, wherein each connecting angle piece comprises a thin metal or plastics plate having pins projecting from each side thereof.

8. An assembly according to claim 7, wherein further connectiiig angle pieces each comprise a thin metal or plastics plate having pins projecting from only one side thereof.

9. Art assembly according to any preceding claim, wherein said assembly further includes a series of hooks for holding a scaffold pipe for supporting the assembly during construction of a mould.

10. An assembly according to claim 9, wherein each hook comprises a plate carrying a pipe receiving portion and a pin receivable in a hole in a side member of a surface frame or in a joining element.

11. An assembly substantially as described herein with reference to the drawings.

12. A surface for the construction of concrete injection moulds, said surface being mounted on a frame adapted to be connected to a similar frame of at least one like surface, the frame being provided on one side of said surface and including vertical members provided with a series of holes adapted to receive pins provided on connecting angle pieces.