FR2476532A2 - METHOD AND DEVICE FOR MANUFACTURING CONCRETE PRODUCTS - Google Patents

Abstract

THE ADDITION CONCERNS IMPROVEMENTS TO THE PROCESS AND TO THE MANUFACTURING DEVICE FOR FRESH PRODUCTS DESCRIBED IN THE MAIN PATENT. ACCORDING TO THE ADDITION, RETRACTABLE GRIPPING MEANS 55 ARE USED FOR DIRECTLY GRABBING PLATES 12 ON WHICH FRESH CONCRETE PRODUCTS 11 COME FROM A PRESS AND TO TAKE THEM TO A STORAGE AREA WHERE THE PRODUCTS UNDERGO SELF-STORAGE . THESE GRIPPING MEANS ARE FOR EXAMPLE CONSTITUTED BY AN ARTICULATED MOBILE CHASSIS 56 HAVING TWO RETRACTABLE GRIPPING ELEMENTS 57 SUCH AS TWO ARTICULATED CORNERS. THESE CORNIERES 57 COOPERATE WITH TWO OPPOSITE SIDES OF THE PLATES 12 WHOSE WIDTH IS GREATER THAN THE PRESS EXIT. THE ADDITION APPLIES TO THE MANUFACTURE OF CONSTRUCTION MATERIALS.

Description

This addition is generally concerned with improvements to the

  method and apparatus for producing concrete products, described in

  French patent application No. 79 09 623 of the applicant.

  This main French patent application describes in particular a process for manufacturing concrete products, consisting in molding these products by means of a concrete press, and then subjecting them to self-drying drying before palletizing them, a process which is characterized by the steps of: - arranging, at the exit of the press at least one receiving means forming a hollow box, - to successively introduce into the box a series of boards arranged side by side in the same direction and supporting products fresh out of the press, - to take the filled box to a storage area by stacking the successive boxes to form a self-baking chamber, - to successively resume the boxes after a predetermined time and to leave the products

  dry that is directed to a pallet

  while the caissons are being re-directed

  loading station of fresh products sartnn dela press.

  This main French patent application also describes a plant for manufacturing concrete products or the like, comprising a casting molding machine for concrete products, drying means for products and means for palletizing dry products, which is characterized in that the means for drying the fresh concrete products are constituted by means of receiving movable hollow boxes, in each of which are placed side by side and in the same direction1 boards supporting the concrete products exiting the press, these boxes being stackable,

  and means being provided for closing substantially

  sealed these hollow boxes stacked so as to constitute a closed enclosure of self-baking for the

drying of the products.

  Such a method and such an installation make it possible in particular to suppress, compared to installations

  existing ones which also allow for complete

  automation of concrete molded products, the construction of

  a steaming chamber and therefore civil engineering works, ferry trucks,

  Elevator and descender systems.

  The purpose of this addition is to improve, but above all to simplify the process and the installation

  described in the main patent application.

  Indeed, the use of storage means forming boxes for self-baking fresh products leaving the press are certainly effective, but are relatively expensive. It is quite possible to design more basic storage means without they constitute for that caissons, the self-baking can be done in any other way without having to build hard speakers. In other words, self-baking can very well be done by placing fresh produce inside a shed

or even in the open air.

  This addition therefore proposes an installation

  manufacture of concrete products or the like, including

  a molding press for fresh concrete products, means for receiving one or more boards arranged end to end in the same direction and on which a series of fresh products leaving the press are based, and means for taking them to the moiré. a process to a storage area for self-baking of fresh products, characterized in that the receiving means is constituted by a support such as a table, and that the means for generating at least a board received on said table comprises retractable gripping means for directly gripping at least one board resting on said table and to disengage from the same board once it is in place on the storage area. According to another characteristic of the present addition, the gripping means are constituted, for example, by an articulated mobile frame having retractable gripping elements such as for example two angles, spaced and parallel to each other, connected to at least one cross member rigid connecting these angles. According to another characteristic of the present addition, each angle can pivot about an axis parallel to the longitudinal direction of the angle, by means of a jack for example, said hinge axis being supported by the connecting beam

the two angles.

  According to another characteristic of the present addition, the above-mentioned table for receiving the boards on which fresh products leaving the press rest, extends parallel to the direct displacement of the boards, and has a width less than the width of the boards, in order to allow the latter to pass on both sides of the longitudinal edges of the table, and thus allow the aforementioned angles to come seize

  at least one board received on the table.

  The present addition also proposes a method for manufacturing concrete products, consisting in molding these products by means of a concrete press, placing them on moving boards and then subjecting them to a

  drying by self-drying before palletizing them,

  risé in that it consists in receiving one or more boards on a support such as a table, said boards being arranged end to end in the same direction, to directly enter at least one board resting on the table by gripping means retractable, to move these gripping means via an overhead crane for example to a storage area, to resume

  after a predetermined time said board through the

  medium of the means of prehension to transport it towards

a palletizing installation.

  As in the main patent, the installation according to the present addition avoids the use of

  ferries, lifts and lifts.

  Other features, benefits and details

  will appear more clearly with the description

  explanatory diagram which will follow made with reference to the accompanying schematic drawings given solely by way of example and in which: - Figure 1 is a schematic top view of a concrete products manufacturing facility according to a first embodiment, and FIG. 2 is a sectional view at the level of

  arrow II of Figure 1 of another embodiment of

preferential addition.

  The two embodiments that will be described relate more particularly to the manufacture of

molded concrete products.

  These products 11 are in the form of hollow blocks which are molded by means of a press 10 of a known type, fed conventionally concrete by appropriate means. The press 10 makes it possible to mold a number of hollow blocks 11 at a time which are deposited on a board 12 made of wood, for example. The molding press 10 is fed continuously

by boards 12.

  A conveyor 13 of a suitable type, for example with rollers, is provided at the exit of the press 10 and takes the planks 12 carrying the fresh concrete products 11, one after the other on a receiving support such as a 16. This table 16 is located in the extension of the conveyor 13. The boards 12 are thus arranged side by side following the same

  direction on the reception table 16.

  In the first embodiment shown in Figure 1, once a series of boards 12 received on the table 16, the set of boards is moved

  laterally on a second table 16 'parallel climb-

  This transfer from the table 16 to the table 16 'is effected, for example, by means of at least one jack 50 mounted perpendicularly to the longitudinal direction of the table 16. The body 51 of the cylinder 50 is secured to the table 16, while the free end of its piston rod 52 is integral with a movable angle 53 extending parallel to the longitudinal direction of the table 16. Under the action of the cylinder 50, the angle 54 abuts against all adjacent sides of the boards 12 present on the table 16

  to move them laterally on the table 16 '.

  It is important to note that the width of the table 16 'is smaller than the corresponding width of the boards 12, so that they exceed

  on both sides of the longitudinal edges of the table 16 '.

  In the second embodiment shown in Figure 2, the table 16 is deleted and is replaced directly by the table 16 '. In other words, the boards 12 arrive directly on the board 16 '

  located in the extension of the conveyor 13.

  To bring the series of boards 12 received on the table 16 '(FIG. 1) or on the table 16' (FIG. 2), towards a storage area 54, there are provided means for

  retractable grasping 55 common to both modes of

  tion and more particularly described in Figure 2.

  These means 55 are constituted for example by an articulated movable frame 56. This frame 56 comprises retractable gripping elements such as two brackets

  57, spaced from each other and extending parallel-

  in the longitudinal direction of the table 16 '.

  These two angles 57 are articulated respectively about two axes 58 supported by a cross member 59 connecting the two angles 57. These hinge pins 58 are parallel to the longitudinal direction of the angles 57. The pivoting of each bracket 57 around at least its pivot axis 58 is provided by means of at least one cylinder 60. The body 61 of this cylinder is articulated on the crossbar 59, while the free end of its piston rod 62 is

  articulated to the angle bracket 57 associated.

  The substantially horizontal arms 63 of the brackets 57 face each other and are intended to support the boards 12. The substantially vertical arms 64 of the brackets 57 are, towards their upper end, articulated on the axes 58, and somewhere else

  articulated to the piston rods 62 of the associated cylinders 60.

  Of course, the cylinders 60 are mounted so that the angles 57, in their pivoting around

  axes 58, move closer or apart from each other.

  A crane 17 is arranged parallel to the longitudinal direction of the table 16 ', and is supported for example by longitudinal prisms 18, or by any other appropriate means. The crane 17 is movable perpendicularly to the longitudinal direction of the table 16 '. The crane 17 is equipped with gripping means 19 such as a hoist for gripping the frame 56 at the sleepers.

59 of the chassis 56.

  The transport of the series of boards 12 received on the table 16 'is carried out as follows in

  both embodiments of Figures 1 and 2.

  The crane 17 is brought to the vertical of the table 16 ', then the frame 56 is lowered in

  direction of the boards 12 resting on the table 161.

  The cylinders 60 are actuated to rotate the brackets 57, so as to separate them from one another. In this way, the distance separating the horizontal arms 63 from the two angles 57 is greater

  that the width of the boards 12 aligned on the table 16 '.

  The frame 56 thus wraps all the boards 12, then the cylinders are actuated in opposite directions to bring the angles 57 closer to each other, so that the arms 63 of these angles take a substantially horizontal position. to come support all the longitudinal edges of the boards 12, longitudinal edges protruding from either side of the table 16 '. Then, the crane 17 is actuated to directly load all the boards 12 and bring them to the storage area 54. At the storage area 54, the crane 17 and the frame 56 are actuated to ensure reverse loading operations, that is to say unload the boards 12 by retracting the angles 57 to

release the chassis 56.

  As in the main patent, the crane 17 is used to take up a series of planks with the dried concrete products on the storage area 54,

  to bring them back to a palletizing facility 24.

  More specifically, the series of boards 12 brought back by the frame 56 are deposited on a table 65, then laterally transhipped by means of a jack 66 and a bracket 67 to a conveyor 23 which routes them to the installation of Palletization 24. The products 11 carried by a board 12 are deposited on a pallet 25 from a magazine 26. The pallets 25 loaded with products 11 are then conveyed by a conveyor 27. The boards 12 are unloaded from the products 11 by the delivery system. palletizing 24 are taken by the conveyor 23 to a plow 28, then they pass from there in a turning system 29, and finally arrive in a store 30 where they are taken one by one to be taken to the press 10 and

  receive a new group of fresh products 11.

  Such a frame 56 is of a simple structure and makes it possible, by means of a traveling crane, to directly move a series of planks towards or from the storage area 54 o the fresh concrete products are dried. The storage area 54 may be a place in the open air, and the boards may be superimposed on each other. In this case, an upper board comes to rest directly on the upper surface of the fresh products of the lower board. This is perfectly possible, provided however that the storage height is limited. To obtain a higher storage height, any appropriate means can be provided so that a board superimposed on another board does not come to bear on the fresh concrete products. For this, we can equip each board with four amounts forming shims, located substantially at the four corners of the board, and whose height is substantially greater than the height

fresh concrete products.

  The storage area can also be located inside an enclosure such as a shed. This shed can be divided into cells or boxes that can be closed once several series of boards interposed. As a variant, these cells may be formed progressively, that is to say once a certain stacking height of boards has been reached, the whole is covered by

any appropriate means.

  It is also important to note that the traveling crane 17 moves only in one direction, i.e. in a direction perpendicular to the longitudinal direction of the table 16 '. In addition, the articulation system of the angles 57 may be different, but it is imperative that the length of each angle to the length of the series of boards received on the table 16 'and that it is desired to transport simultaneously and directly to

the storage area.

  According to the invention, the gripping means may have different structures, particularly at the level of the gripping elements themselves, which are not necessarily angles given solely by way of example. Likewise, chassis means any means forming a support for the gripping elements. As for the traveling crane, it also needs to move in a direction parallel to the longitudinal direction of the table receiving the boards following the chosen storage area. It should be noted finally that the principle of the invention remains valid if we consider either the transport of a series of boards put end to end, but only the transport of a single board on which rests

  fresh concrete products at the exit of the press.

  Of course, the invention is not limited to the embodiments which have been given and described only by way of example, but it includes all the technical equivalents of the means described, as well as their combinations, if these these are realized and put

  implemented in the context of protection as claimed.

Claims (9)

R E V E N D I C A T IO N S   1. Installation for manufacturing concrete products or the like, comprising a molding press for fresh concrete products, means for receiving one or more boards arranged end to end in the same direction and on which a series of products is based fresh out of the press, and means to take at least one board to a storage area to ensure the self-baking of fresh products according to   1one of claims 1 to 8 of the main patent,   characterized in that the receiving means is con-   staged by a support such as a table, and in that the means for taking at least one board received on said table are constituted by retractable gripping means for directly grasping at least one board resting on said table and to disengage from this same board once this one in place on the area storage.   2. Installation according to claim 1, characterized in that the gripping means are constituted for example by an articulated mobile frame   having retractable gripping elements.   3. Installation according to claim 2, characterized in that the gripping elements are constituted for example by two parallel spaced angles connected articulated.à at least one cross rigid connecting angles.   4. Installation according to claim 3, -   characterized in that each angle can pivot about an axis parallel to the longitudinal direction 3 of the angle by means of a jack for example,   axle supported by said rigid beam.   5. Installation according to one of the claims   preceding, characterized in that the aforementioned table for receiving boards on which rest   fresh produce coming out of the press, extends parallel-   to the direction of displacement of the boards and has a width less than the width of the boards, so as to allow them to pass on both sides of the longitudinal edges of said table, and thus allow the aforementioned angles to come seize   at least one board received on said table.   6. Installation according to one of the claims   previous, characterized in that the means for carrying at least one board also comprise a traveling crane for example, which moves in a direction perpendicular to the longitudinal direction of the aforesaid table on which are received said boards at the exit of the press said traveling crane being connected to the frame supporting the gripping means. 7. A method of manufacturing concrete products consisting of molding these products by means of a concrete press, placing them on moving boards, and then subjecting them to self-drying drying before palletizing, characterized in that what it consists in receiving on a support such as a table, a board or a series of boards arranged end to end in the same direction parallel to the longitudinal direction of said table, to directly enter at least one board resting on said table by retractable gripping means, to move these means by means of an overhead crane for example to a storage area, to resume after a predetermined time the board by the gripping means to transport it to a palletizing installation.   8. Method according to claim 7, characterized in that it consists in stacking directly on each other series of boards on the storage area. 9. The method of claim 7, characterized in that it consists in stacking on each other series of boards safe storage area, by means of shims whose height is slightly greater than the height of the products. fresh resting on the planks.