WO2012140329A1 - Device which is intended for forming a cavity within a construction element receiving a handling anchor, and which can be matched to the size of the anchor - Google Patents

Abstract

The invention relates to a device for forming a cavity within a construction element during the molding thereof, said construction element receiving the head of at least one handling anchor (8) of the construction element, and including at least one inner space for receiving the head of the anchor, the inlet of which has a size corresponding to the cross-section of the anchor in the engaged position thereof in the inner space formed by the assembly of two half-buffers (A, B) that are movable between an assembled position for forming the receiving space, and a spaced-apart position for releasing the head of the anchor. According to the invention, the size of the passage inlet is variable and can be matched to anchors having variously sized cross-sections or to multiple anchors. The invention can be used for forming a cavity within a construction element.

Description

 "Device for forming a reservation within a construction element accommodating a handling anchor, adaptable to the dimensions of the anchor".

The invention relates to a device for forming a reservation in a construction element which accommodates an anchor for handling this element in a sealed manner.

 The reservation made within a building element consists of a narrow cavity formed on one of the walls of the element. It is obtained by means of a buffer which is introduced into the mold for manufacturing the element, and which fixes the anchor on the mold, and sealingly accommodates the head of the anchor during the casting or molding of the building element. Once the construction element is solidified, the pad is removed from the mold and leaves the anchor head freely accessible in the resulting cavity.

 A buffer of this type, such as in particular described in US Pat. No. 7,032,354, comprises an internal receiving space of the anchor head whose entry has a width corresponding to the thickness of the anchor in its engaged position. .

 It is formed by the assembly of two movable half-pads between an assembled position of formation of the receiving space, and a separated position of clearance of the head of the anchor.

 Depending in particular on the weight of the construction element to be moved, one must adapt the dimensions of the anchor in particular in cross section or increase the number of anchors to provide in the cavity.

Thus, it is sometimes necessary to choose for heavier concrete panels anchors larger wider thickness, or two anchors contiguous to each other.

 However, the known type of buffer is suitable only for a single anchor with particular cross-sectional dimensions and if it was used for an anchor having significant dimensions, or for several anchors juxtaposed to each other, the half-buffers that the would separate from each other and concrete could enter the receiving space of the head of the anchor. The buffer would then no longer be waterproof.

 The invention aims to overcome this drawback.

 For this purpose, the invention relates to a device for forming a reservation within a construction element during its molding, hermetically accommodating the head of at least one handling anchor of the construction element, comprising a space internal receiver of the anchor head whose dimensions correspond to the dimensions of the anchor in cross section in its engaged position, formed by the assembly of two movable half-buffer between an assembled position of formation of the space of receiving, and a spaced release position of the head of the anchor.

 According to the invention, the dimensions of the passage entrance are variable and adaptable to anchors of cross-sectional dimensions of different dimensions or to multiple anchors.

According to another characteristic, the inlet has a width corresponding to the thickness of the anchor and the width of the passageway is variable and adaptable to anchors of different thicknesses or multiple anchors. Advantageously, the two half-pads are assembled to each other by interlocking a male part in a female part of a variable length.

 Preferably, the two half-buffers comprise locking means relative to one another in different positions along the direction of nesting.

 In this case, the locking means comprise ribs and a corresponding abutment, the abutment being locked between two ribs in a first interlocking position, and disengaging from one of the ribs on application of a force greater than a threshold in the direction of nesting.

 According to another possibility, the locking means comprise a tab connecting the two half-pads to one another, one end of this tab being fixed to a first pad and provided with an oblong slot extending in the direction interlocking and a fastening means engageable along this oblong slot to fix the tab to the second buffer.

 According to another feature, the male part includes a centering token of the anchor head extending into the receiving space of the anchor, and the female part comprises a receiving recess of the token in the assembled position. half-buffers.

 Advantageously, each half-buffer carries both a male part portion and a female portion portion.

Ideally, each half-buffer comprises on one side of an anti-symmetry plane P a half of a male part and on the other side of this plane a corresponding female half-part, the male part-half of a first half. half-buffer engaging in the half of the female portion of the second half-buffer in the assembled position of the half-buffers. According to yet another characteristic, the inlet has a length corresponding to the width of the anchor and the length of the passage entrance is variable and adaptable to anchors of different widths.

 In this case, for example, the entry of the reception space comprises two opposite edges which carry lips for decreasing the length of the inlet, articulated at these two edges between an active position in which these lips extend between the edges of the entry and decrease the length, and an inactive position in which these lips extend outside the receiving space of the anchor and have no impact on the length of the entry of this space.

 Preferably, the articulation of each lip to the corresponding edge of the inlet or the receiving space is obtained by a portion of material of lesser thickness.

The invention also relates to a half-buffer intended to cooperate with a second half-buffer of the same type to form a half of a device for forming a reservation within a construction element during its molding, comprising a face main, a male portion projecting from this face in a direction of approach with the second half-buffer and a corresponding female portion recessed vis-à-vis the main face in the direction of approach, the male and female parts s' extending on either side of an anti-symmetry plane and at an equal distance from this plane, the male part of the half-buffer being intended to be housed in the female part of the second half-buffer of the same type arranged opposite to -vis, the length of the male part defining the maximum width of the entry of the receiving space of the anchor. The invention will be better understood and other objects, details and advantages thereof will appear more clearly on reading the description which follows, with reference to the accompanying drawings, given solely by way of example, among which:

- Figure 1 shows a perspective view of a half-reservation buffer according to the invention, according to a first angle of view;

FIG. 2 shows a perspective view of the half-buffer of FIG. 1, along a second angle of view;

FIG. 3 is an exploded perspective view of a buffer device according to the invention, comprising two half-buffers according to FIG. 1, and used for fastening a flat-shaped lifting anchor in a mold. dovetail or carp tail type; FIG. 4 represents in perspective a first step of placing a flattened anchor of a thickness "e" within the device according to the invention, consisting of the insertion of the anchor of FIG. within the half-buffer of Figure 1;

FIG. 5 represents a top view of a second step of placing the anchor of FIG. 4 within the device according to the invention, consisting in bringing the half-buffer carrying the anchor closer to a second half-buffer; disposed opposite, this view highlighting the "plane of anti-symmetry P" of each half-buffer;

FIG. 6 corresponds to a side view of the device of FIG. 5 with tearing away of the part of the device located above the plane P in this figure 5, or a side view of an alternative embodiment of the device according to the invention; FIG. 7 is a perspective view of the last step of setting up an anchor within the device according to the invention, consisting in the complete interlocking of the half-buffers in one another and in their fixation in their nested state and schematically representing this device within a concrete slab;

FIG. 8 is a view similar to that of FIG. 7 obtained with an anchor of greater thickness than that of the anchor of FIG. 7;

FIG. 9 is a front view of a half-buffer of the device according to the invention, showing with hatched patterns, the parts in relief vis-à-vis the main face of this half-buffer and with patterns dotted the recessed parts.

FIG. 10 shows in perspective a half-buffer according to a second embodiment comprising lips for limiting the length of the entry of the reception space,

FIGS. 11 to 14 show in bottom view, and schematically, half-buffers housing anchors of transverse sections of different sizes and shapes when the interlocking depth varies,

- Figures 15 and 16 show schematically in bottom view, two half-pads can accommodate anchors with circular cross sections and different diameters. The device according to the invention as illustrated in the figures allows the formation of a reservation within a construction element such as a block or a concrete slab, and the fixing of a handling anchor in this booking.

 As can be seen in FIG. 7, it has the form of a buffer 1 defining a bottom of substantially hemispherical shape 2, which will give shape to the reservation, and a flat upper wall 3 intended to run along a corresponding wall. the manufacturing mold of the building element. It further comprises an internal space 4 for receiving the anchor head which will be better described below and whose inlet 6 opens onto the bottom wall 2.

 It is for example particularly suitable for flat-shaped anchors 8 which thus have a flat head 9 and a body which is also plane and of the same section as the head, as represented in FIG. 4. In this case, the reception space 4 of the anchor 8 has a parallelepipedal overall shape and the entrance of this space has a rectangular contour corresponding to the cross section of the receiving space.

 As can be seen in FIG. 3, the device according to the invention is obtained by assembling the two half-buffers A and B arranged facing each other, and which are movable between the position separated from the Figure 3 introduction and release of the head of the anchor, and the nested position of Figure 7 wherein they form the receiving space 4 for the anchor and receive sealed manner.

The device according to the invention has been designed to adapt to anchors whose cross sections have different dimensions and / or to receive more than one anchor at a time for example two plane anchors juxtaposed one on the other , and the entrance to the space of Anchoring of the anchor has variable dimensions, adaptable to the dimensions of the anchor in cross section.

 More precisely, the width and the length of the passage opening of the anchor are made variable depending on the thickness and the width of the anchor to be received, or as a function of the cumulative thicknesses of the anchors to be received.

 To make the width of the input of the receiving space variable, the two half-buffers A and B comprise male and female parts nestable within each other over a variable distance between the deepest nesting or FIG. 7, thus providing the reception space with a minimum width and a shallower or partial interlocking of FIG. 8, the depth of the nesting determining the width of the opening.

 And the adaptation of the device to the width of the anchor is obtained by simple lips 51a for limiting the length of the entrance of the reception space, as illustrated in FIG.

 In addition, the device according to the invention manages to present an entry of the receiving space of variable dimensions by means of two identical half-pads at any point, despite the necessary presence of male and female parts to achieve the interlocking.

This performance is achieved by virtue of the fact that each half-buffer comprises at the same time a half of a male part and a half of a female part placed on either side of a plane separating the half-buffer in two equal portions, and which will be named "plane of anti-symmetry" since each male element located on one side of this plane, corresponds to a complementary female element. More specifically, as is apparent from FIGS. 1 and 2, the half-pad A comprises from the plane P an upper wall 31a and a lateral wall 32a orthogonal to the upper wall and together constituting the right half 21a of a U-shaped partition. , the left half of this U-shaped partition consisting of the upper wall 31b and side wall 32b of the second half-buffer B arranged opposite. The right half of partition 21a extends in the direction of approach of the half-buffer from a face 22a of the half-buffer having the same shape as the face of the anchor to receive.

 Each wall of wall 21a, 22a carries on its outer face ribs 40 highlighted in Figure 6 which cooperate in the nested position of the half-pads A, B with a stop formed in the recess of the other half-buffer for locking the nesting at different positions along the direction of approach of the half-buffers.

 Still from the plane P, the half-pad A comprises an upper recess 33a and a lateral recess 34a both recessed with respect to the face 22a and together constituting a left half of a U-shaped housing intended to accommodate half of partition opposite 21b of the second half-buffer B.

 With their two U-shaped partition halves and their two U-shaped housing halves, the two half-buffers form, when nested together, a U-shaped partition and a recess of complementary shape and sufficiently deep so that the partition can engage in a large and variable length.

As can be seen in FIG. 11, the reception space of the anchor is thus defined by the U-shaped partition 21a, 21b and the faces 22a, 22b facing the half-buffers, and the entry of the reception space. by the two lower edges 26a, 26b of the opposite walls 27a, 27b of the partition and the lower free edges 28a, 28b of the two faces 22a, 22b opposite the half-pads.

 Thus, as can be seen by comparison of FIGS. 11 and 12, the width of the opening increases when the U-shaped partition 21a, 21b is disengaged from the corresponding recess. And the width of the receiving space of the anchor increases accordingly since in the example shown the passage opening has the same dimensions as the cross section of the receiving space.

 In the example shown in the figures, the partition has a width of 12 mm and can be engaged in the recess over 6 mm, which results in that the width of the receiving space of the head of the anchor can vary between 6 and 12 mm and can accommodate flattened anchors having thicknesses of between 3 and 10 mm for example.

 And for the constitution of the limiting lip 51a of the length of the entry of the reception space, as visible in FIG. 10, the lower edge 26a of the side wall 27a of a half-buffer is extended by all its length by an outgrowth of material, which is articulated to the side wall 27a by a portion of lesser thickness of material.

 A positioning reinforcement of this lip 51a is provided in the entry of the reception space which brings back the lip 51a against the anchor in the assembled position of the half-buffers.

This reinforcement 52a is provided, as shown in FIG. 10, on the lower edge of the lateral wall delimiting the lateral recess 34b and is applied behind the lip 51b of the other half-buffer B when the two buffers are fitted together. one in the other. This reinforcement 52a or small lip 52a is bent inwardly from the entrance of the receiving space of the anchor and has sufficient bending resistance to systematically bring the lip 51b back against the anchor.

 In addition, the half-buffer A. according to the invention integrates a half positioning pin of the anchor 36a extending from the plane P by projecting from the face 22a of the anchor footprint in the direction of bringing the two half-buffers A, B, and a recess 37a corresponding extending from the other side of the plane P recessed vis-à-vis the impression face 22a.

 Thus, when the half-buffers A, B are nested one inside the other, the half-piece 36a, 36b of one fits into the half-recess 37b, 37a of the other, the two half-pieces 36a, 36b of the two half-buffers forming together, a contour corresponding to the cut made in the head of the anchor for the passage of the handling ring.

 The device according to the invention thus integrates in a simple way and without independent part, the function of positioning and fixed holding of the anchor in the cavity during the molding of the construction element.

 In addition, because the two half-buffers are identical and each carry a half of a male part and a half of a female part on either side of a "plane of antisymetry", their storage and referencing are facilities.

But of course, it can be provided on the contrary according to an alternative embodiment which could be illustrated by a figure similar to Figure 6, that one of the two half-buffers carries the whole of the male part, that is, that is to say the whole of the U-shaped partition, and that the second half-buffer carries the whole of the female part, namely the hollow housing, also in U-shape. either of these half-buffers can carry the positioning pin of the anchor.

 But whatever their shape, the half-pads can be made of plastic, metal, or wood.

 And when they are plastically or elastically deformable, for example an elastomer, they may have a common upper edge formed for example by a flexible membrane and may be demolded by pivoting them together around this upper common edge to remove one of the other their bases.

 And when they are rigid or semi-rigid, for example polystyrene, it can be provided to sublimate them once the construction element is solidified, to mount the handling ring on the head of the anchor

 In addition, the face 22a of the half-buffer against which the anchor is disposed may also have the shape of the anchor in question. This is why in FIG. 1, this face 22a comprises two upper protrusions, which make it possible to accommodate the upper tabs sometimes extending the head of the dovetail or carp anchors.

Also, since the two half-buffers are identical and adapt to anchors of the same shape and of different thicknesses and / or different widths, they can be mass-produced whereas it would have been necessary with existing half-buffers to make as many half-buffers as. anchor of different thicknesses and widths. As a result, the production cost of a half-buffer according to the invention is considerably reduced compared to existing buffers. Furthermore, a half-buffer according to the invention can be obtained by a single molding operation by which both the male-female parts and the one-piece positioning token are formed, where devices of known type are known. require for their manufacture several assembled parts. The cost of manufacturing a half-buffer according to the invention will be so low that it can be used in "single use".

 And the anchors that can be used with the device according to the invention may have in cross section a shape different from that of a rectangle as the opposite edges of the inlet defined by the male and female parts of the two half-tamped plugs. apply to this form sealingly and may continue to always apply sealingly against an anchor of the same shape but different thickness when the interlocking depth of the two half-pads varies.

 Thus, as shown in FIGS. 13 and 14, with a half-buffer comprising a curved main face 22a to fit the cylindrical shape of the body of a cylindrical anchor, it is possible to also receive an oblong-shaped cross-section anchor and whose two ends have a rounding identical to that of the cylindrical body of the anchor.

FIGS. 15 and 16 schematically represent half-buffers of another structure, devoid of male and female interlocking parts, but of a curved wall 41 capable of conforming to the shape of the cylindrical body of an anchor of this type or of any other shape and consists of an elastic material that deforms to accommodate an anchor thicker. It can be provided that this half-buffer comprises a shell 42 adapted to cap, the cylindrical head 43 of the anchor, larger diameter than the body.

 Or, as illustrated in FIG. 16, it is possible to provide that the half-buffer is formed only of a hook-shaped part whose flexible inner wall can be applied to the cylindrical bodies, of anchors of diameters different, and on the upper face of which the head of the anchor can come to support.

 The building elements concerned by the invention may be prefabricated blocks and panels, in particular made of concrete or composite material.

Claims

1. A device for forming a reservation within a construction element during its molding, accommodating the head of at least one handling anchor of the construction element, comprising an internal space for receiving the head of the building element. anchor whose input has dimensions corresponding to the cross section of the anchor in its position engaged in the internal space, formed by the assembly of two movable half-buffer between an assembled position of formation of the space of receiving, and a spaced apart position of release of the head of the anchor, characterized in that the dimensions of the passage entrance are variable and adaptable to anchors cross sections of different dimensions or multiple anchors. 2. Device according to claim 1, characterized in that the inlet has a width corresponding to the thickness of the anchor and in that the width of the entrance passage is variable and adaptable to anchors of different thicknesses or multiple anchors. 3. Device according to claim 2, characterized in that the two half-pads are assembled to each other by interlocking a male part in a female part of a variable length. 4. Device according to claim 3, characterized in that the two half-buffers comprise locking means relative to each other in different positions along the nesting direction. 5. Device according to claim 4, characterized in that the locking means comprise ribs and a corresponding abutment, the abutment being locked between two ribs in a first interlocking position, and disengaging from one of the ribs on application a force greater than a threshold in the direction of interlocking. 6. Device according to claim 4, characterized in that the locking means comprise a tab connecting the two half-buffers to one another, one end of this tab being fixed to a first buffer and provided with a light oblong extending in the direction of engagement and a fastening means engageable along the oblong slot to fix the tab to the second buffer. 7. Device according to one of claims 3 to 6, characterized in that the male part comprises a centering token of the head of the anchor extending in the receiving space of the anchor, and the female part includes a receiving recess of the token in the assembled position of the half-pads. 8. Device according to one of claims 3 to 7, characterized in that each half-buffer carries both a male portion portion and a female portion portion. 9. Device according to claim 8, characterized in that each half buffer comprises on one side of an anti-symmetry plane P a half of the male part and on the other side of this plane a corresponding half of the female part. , the half of the male part of a first half-buffer engaging in the half of the female part the second half-buffer in the assembled position of the half-buffers. 10. Device according to one of the preceding claims, characterized in that the inlet has a length corresponding to the width of one anchor and in that the length of the passage entrance is variable and adaptable to anchors widths different. 11. Device according to claim 10, characterized in that the inlet of the receiving space comprises two opposite edges which carry lips for decreasing the length of the inlet, articulated at these two edges between an active position in which these lips extend between the edges of the inlet and decrease the length, and an inactive position in which these lips extend outside the receiving space of the anchor and have no impact on the length from the entrance of this space. 12. Device according to claim 11, characterized in that the articulation of each lip to the corresponding edge of the entrance of the receiving space is obtained by a portion of material of lesser thickness. 13. A half-buffer intended to cooperate with a second half-buffer of the same type to form a device for forming a reservation within a construction element during its molding, comprising a main face (22a), a male part protruding from this face in a direction of approach with a second half-buffer and a corresponding female part in recess vis-à-vis the main face in the direction of approach, the male and female parts extending on either side of an anti-symmetry plane and equidistant from this plane, the male part of the half-buffer being intended to be housed in the female part of the half-buffer of the same type arranged the length of the male part defining the maximum width of the entrance of the receiving space of the anchor.