Head for raised floor pedestal

Abstract

Head for raised floor pedestal The present invention relates to a head, for a pedestal of a raised floor, comprising: a plate (60), which includes a main face (61) delimited by a closed contour (62) and being perpendicularly crossed by a central axis (Z61); and a first ear (70), integral with the plate (60), projecting from the main face (61) between the central axis (Z61) and a first primary portion (64) of the closed contour (62) and comprising a primary curved wall (71) and a secondary curved wall (72), both extending parallel to the central axis (Z61) from the main face (61) and being curved so as to be convex in the direction of the central axis (Z61), the secondary curved wall (72) being shaped so that, for any given portion of the primary curved wall (71), there is a corresponding portion of the secondary curved wall (72) which is perpendicular to this given portion. Figure for the summary: Figure 4

Description

Title of the invention: Head for raised floor pedestal

[0001] The present invention relates to a head for a pedestal of a raised floor, a pedestal comprising such a head and a raised floor comprising such a pedestal.

[0002] A raised deck platform is known, comprising pedestals supporting rows of parallel longitudinal joists spaced approximately fifty centimeters apart, and transverse braces maintaining the spacing between the joists of two successive rows. Wooden or wood-based composite planks forming the decking surface are laid and fixed onto the joists. Each pedestal has a head whose height is adjustable to be coplanar with the heads of the other pedestals, ensuring the flatness of the decking surface. Each head has a horizontal discoidal plate on which the joist rests, and a straight vertical tongue, positioned laterally on the plate and against which the joist butts laterally. The tongue receives a screw to secure the pedestal to the joist.

[0003] While these known pedestals generally provide satisfactory support for standard joists, they prove less convenient to install for wide or narrow joists, since the joist, when placed against the tongue laterally, is not centered on the pedestal's central axis. Furthermore, while the tongue facilitates positioning the joist on the pedestal and allows the pedestal to be fixed to the joist, no means of positioning the brace is provided, making it difficult to fix the pedestal to the brace and / or the brace to the joist.

[0004] Furthermore, certain parts of the raised floor, for example at the edge of the floor or at a junction between two rows of boards, may require two relatively close parallel rows of joists, for example spaced fifty millimeters apart, which is sometimes referred to as "double joist system," as opposed to "single joist system," where the joists are spaced about fifty centimeters apart. In this situation, the presence of two rows of joists necessitates a significant number of pedestals, each pedestal supporting only one of the two rows of joists.

[0005] The aim of the invention is therefore to propose a new pedestal head that is more versatile and facilitates the installation of the raised floor.

[0006] To this end, the invention relates to a head for a support of a raised floor, the head comprising: a plate, which includes a principal face delimited by a closed contour belonging to the plate and being perpendicularly traversed by a central axis; and a first lug, integral with the plate, projecting from the principal face between the central axis and a first primary portion of the closed contour and comprising a primary curved wall and a secondary curved wall, both extending parallel to the central axis from the primary face and being curved so as to be convex in the direction of the central axis, the secondary curved wall being shaped so that, for any given portion of the primary curved wall, there exists a corresponding portion of the secondary curved wall which is perpendicular to that given portion.

[0007] By stating that the primary and secondary curved walls are convex in the direction of the central axis, it is understood that said primary and secondary curved walls are arranged between the central axis and the respective axis of curvature of said curved walls, or the locus of the centers of curvature of said curved walls.

[0008] One idea underlying the invention is to provide that the primary curved wall of the first ear is configured to advantageously receive, laterally, a joist from the raised floor, while the joist is supported by the main face. Thanks to the curved shape of the primary curved wall, the joist can be pivoted relative to the head around an axis parallel to the central axis, until it reaches a position where the joist is centered on the central axis while still being laterally supported against the primary curved wall. With the joist thus positioned, the head can easily be fixed to the joist, for example by driving a screw through the first ear into the joist.

[0009] One idea underlying the invention is to provide that the secondary curved wall of the first ear is configured to advantageously receive, in lateral support, a brace of the raised floor, arranged perpendicular to the joist, while the brace is supported by the main face. In this configuration, one end of the brace is advantageously in contact with the joist. Thanks to the curved shape of the secondary curved wall, the brace can be placed in lateral contact with the secondary curved wall regardless of the orientation of the joist in contact with the primary curved wall, since, for any portion of the primary curved wall against which the joist is likely to be in lateral contact, there is a corresponding portion of the secondary curved wall, for the lateral support of the brace, which is perpendicular to said portion of the primary curved wall.With the brace positioned in this way, the head can easily be fixed to the brace, for example by implanting a screw into the brace through the first ear.

[0010] Preferably, the secondary curved wall is folded down towards the first primary portion of the contour relative to the primary curved wall. For the secondary curved wall to be folded down relative to the primary curved wall, it is preferable that an end of the primary curved wall that is closest to an end of the secondary curved wall be inclined relative to each other in a direction that brings the secondary curved wall closer to the primary curved wall.

[0011] By designating the secondary curved wall as folded back relative to the primary curved wall, the first ear is particularly compact. Preferably, the first ear is even compact enough that, instead of the aforementioned joist and strut constituting a "single joist system," two parallel joists can be placed on either side of the first ear, supported by the main face. The head is then able to receive two joists at once, for example, to create a "double joist system."

[0012] Alternatively or in addition, for reasons of compactness of the first ear, it can be provided that the primary curved wall is curved along a first constant radius of curvature, the secondary curved wall is curved along a second radius of curvature smaller than the first radius of curvature and / or the respective axis of curvature of the primary and secondary curved walls are not coincident.

[0013] According to other advantageous aspects of the invention, the invention comprises one or more of the following features, taken individually or in all technically possible combinations:

[0014] - The first ear includes an intermediate wall, extending parallel to the central axis from the main face, the primary curved wall and the secondary curved wall of the first ear being connected via the intermediate wall.

[0015] - The intermediate wall is straight and extends tangentially from said wall primary curve.

[0016] - The first ear comprises a primary extremity wall, extending parallel to the central axis from the main face, extending tangentially from the primary curved wall of the first ear, said primary curved wall connecting the intermediate wall of the first ear to said primary extremal wall.

[0017] - The first ear comprises a secondary extremity wall, extending parallel to the central axis from the main face, extending tangentially from the secondary curved wall of the first ear and being perpendicular to the intermediate wall of the first ear.

[0018] - The first ear includes a rib, extending parallel to the central axis from the main face, along the first primary portion of the closed contour.

[0019] - The head includes a second ear, fixed to the plate, projecting from the main face between the central axis and a second primary portion of the closed contour diametrically opposite to the first primary portion of the closed contour with respect to the central axis, the second ear comprising a primary curved wall and a secondary curved wall, the primary curved walls being symmetrical with respect to the central axis and the secondary curved walls being symmetrical with respect to the central axis.

[0020] - The closed contour includes a secondary portion, arranged between the first primary portion to the second primary portion.

[0021] - The first ear comprises a primary transverse wall, extending parallel to the central axis from the main face and being straight.

[0022] - The second ear comprises a secondary transverse wall, extending parallel to the central axis from the main face and being straight.

[0023] - The primary transverse wall and the secondary transverse wall are coplanar with a coplanarity plane arranged between the central axis and the secondary portion, a distance of at least 32 millimeters, measured perpendicular to the coplanarity plane, separating the coplanarity plane and the secondary portion.

[0024] - The first ear comprises a secondary transverse wall, extending parallel to the central axis from the main face and being straight, the secondary transverse walls being symmetrical with respect to the central axis.

[0025] The invention also relates to the plot, which comprises: the head, as defined above; a base, configured to rest on a ground surface; and a connection, through which the base supports the head so that the position of the head relative to the base is adjustable, the base being crossed by the central axis.

[0026] The invention also relates to the raised floor, comprising: the pedestal as defined above; a joist, supported by the main face and laterally supported against the primary curved wall of the first ear; and a brace, perpendicular to said joist, supported by the main face and laterally supported against the secondary curved wall of the first ear.

[0027] The invention will become clearer upon reading the following description, given solely by way of non-limiting example, and made with reference to the drawings in which:

[0028] [Fig-1] [Fig.1] is a perspective view of a raised floor according to a mode of realization of the invention;

[0029] [Fig.2] [Fig.2] is a perspective view of a block belonging to the floor raised from the [Fig.l];

[0030] [Fig.3] [Fig.3] shows top views A, B and C of the same head belonging to the block of [Fig.2] and supporting a joist and a strut, of large width on view A, of intermediate width on view B and of small width on view C;

[0031] [Fig.4] [Fig.4] shows a top view of the head of [Fig.3], and supporting two wide joists;

[0032] [Fig.5] [Fig.5] shows a detail according to frame V of view B of [Fig.3].

[0033] Fig. 1 shows a raised floor 1, constituting for example an outdoor terrace, comprising joists 10, struts 20, a floor surface 30 and pads 40, resting on a ground surface 2.

[0034] The joists 10 are parallel to a horizontal longitudinal direction X. The braces are parallel to a horizontal transverse direction Y and perpendicular to the X direction. The floor surface 30 is perpendicular to a Z direction, vertical and directed upwards, perpendicular to the X and Y directions. The floor surface 30 is made up of blades 31 which are parallel to the Y direction.

[0035] The joists 10, the struts 20, and the boards 31 are preferably made of wood, or of a composite material containing essentially wood, or of a wood-based composite material. The boards 31, which are visible, may be made of a different material than the joists 10 and the struts 20, which are concealed beneath the floor surface 30.

[0036] The blades 31 are preferentially arranged in rows of blades 31 along the X direction. In [Fig. 1], two rows of blades 31 are shown. In [Fig. 1], some blades 31 in the right-hand row are omitted to show the underlying joists 10, struts, and blocks 40.

[0037] Preferably, the joists 10 and the braces 20 are made of the same profiled material with a rectangular cross-section. The joists 10 and the braces 20 therefore advantageously have the same cross-section.

[0038] The joists 10 are distributed along the Y direction. Along the X direction, several joists 10 can follow one another in alignment with each other, in the case where a single joist 10 would not be long enough to cover the entire length of the raised floor 1 along the X direction.

[0039] Some of the joists 10 are arranged in a "simple joist arrangement," that is, they are spaced apart along the Y direction by a center-to-center distance, measured along the Y direction, which is large, for example, between 40 and 70 cm (centimeters), preferably 50 cm. As shown in [Fig. 1], at least one brace 20 is interposed along the Y direction between two adjacent joists 10 along the Y direction when they are in a simple joist arrangement. Preferably, several braces 20 are interposed along the Y direction and spaced along the X direction between said joists 10, thus ensuring compliance with the desired center-to-center distance and the parallelism of said joists 10. The braces all have the same length along the Y direction.

[0040] Other joists 10 are arranged in a "double joist arrangement", that is to say, they are spaced from each other along the Y direction by a center-to-center distance, measured along the Y direction, which is smaller, for example between 40 and 60 mm (millimeters), preferably 50 mm. Advantageously, it is provided that there is no cross brace interposed between the adjacent joists 10 in the double joist arrangement, whereas, as explained below, the supports 40 ensure parallelism and compliance with the center-to-center distance.

[0041] The floor surface 30 rests on the joists 10 and is fixed to them, for example by means of screws. The joists 10 are distributed over the entire area of ​​the raised floor 1, to support the floor surface 30 along the Z direction. The joists 10 extend from one edge to the other of the raised floor 1, for edges parallel to the Y direction. Preferably, joists 10 are doubled at two edges of the raised floor 1, for edges parallel to the X direction. Preferably, joists 10 are doubled at the boundary between two rows of boards 31, one joist 10 being under the first row, the other joist being under the second row. Everywhere else, the joists 10 are advantageously singled.

[0042] The pedestals 40 are shown in [Fig. 1] integrated into the raised floor 1. One of these pedestals 40 is shown individually in [Fig. 2]. As shown in [Fig. 1], each pedestal 40 rests on the floor surface 2 and supports either a single joist 10 in a single joist system or two joists 10 in a double joist system. In the case where a single joist 10 in a single joist system is supported by the pedestal 40, the pedestal can also support a strut 20 in addition to the joist 10, as shown in [Fig. 1]. For each joist 10, several pedestals 40 supporting this joist 10 are advantageously provided. Preferably, the pedestals 40 are configured to maintain the floor surface 30 at a height of less than 1 m relative to the floor surface 2.

[0043] In more detail, the plot 40 includes a base 41, a link 42 and a head 50.

[0044] The base 41 is traversed by a base axis A41 and is configured to rest on the ground surface 2 such that the base axis A41 is perpendicular to ground surface 2. Depending on the horizontality of ground surface 2, the base axis A41 can be parallel to the Z direction, or slightly oblique to the Z direction.

[0045] The link 42 is supported by the base 41, so that the base 41 supports the head 50 via the link, so that the head 50 is traversed by the axis of the base A41. The link 42 is configured so that the position of the head 50 relative to the base 41 is adjustable.

[0046] To allow adjustment of the position of the head 50, the connection 42 preferably comprises a base element 43 supported by the base 41 and a head element 44 supporting the head 50 and being supported by the base element 43. The connection 42 preferably comprises a screw and a nut coaxial with the base axis A41 and engaged by screwing into each other along the base axis A41 so that the position of the head 50 relative to the base is adjustable along the base axis A41, i.e., adjustable in height relative to the floor surface 2. The screw belongs to a first element, either the base element 43 or the head element 44, while the nut belongs to a second element, distinct from the first element, either the head element 44 or the base element 43. In the present case, the element of base 43 includes the nut, which is fixedly attached to base 41 and is coaxial with axis A41 and The head element 44 includes the screw, which supports the head 50 and is coaxial with the axis A41. The link 42 advantageously includes an actuating ring 45 belonging to the head element 44 or to the base element 43, to actuate this element in rotation around the axis A41 relative to the other element 44 or 43, and thus allow adjustment of the position of the head 50 relative to the base 41 along the axis A41, by screwing / unscrewing the screw and the nut into each other. Here, for example, it is provided that the crown 45 belongs to the head element 44, that is to say, is fixedly attached to the screw, by being arranged at an upper end of the head element 44, that is to say opposite the base element 43. In practice the crown 45 is actuable by hand and / or with the aid of an appropriate tool and includes, for example, for this purpose, a series of lugs distributed around the axis A41.

[0047] To allow adjustment of the position of the head 50, the linkage 42 preferably includes a ball joint 46, through which the linkage 42 supports the head 50. Here, the ball joint 46 belongs to the head element 44, being formed at the upper end of the head element 44. The ball joint 46 is advantageously centered on the axis A41 and allows adjustment of the orientation of the head 50 around the axis A41 and around two other axes perpendicular to the axis A41.

[0048] The head 50 comprises a plate 60 and exactly two ears 70 fixedly attached to the plate 60.

[0049] The plate 60 comprises a main face 61 and a closed contour 62 and preferably, a lower part 63.

[0050] The plate 60 is transverse with respect to the base axis A41.

[0051] The main face 61 is flat and is delimited by the closed contour 62, which surrounds it. The closed contour 62 is also flat. The main face 61 is traversed, at its center, by a central axis Z61, perpendicular to the main face 61 and to the closed contour 62. In other words, the axis Z61 passes through a geometric center of the closed contour 62. The central axis Z61 is parallel to the Z direction. The main face 61 is oriented in the direction of Z. The axis Z61 passes through the base 41, preferably from one side to the other.

[0052] If the ball joint 46 is provided, the axis Z61 passes through the center of the ball joint 46 and, depending on the orientation given to the main face 61 by the ball joint 46, is either oblique with respect to the axis A41, intersecting the axis A41, or coaxial with the axis A41. The ball joint 46 allows a slight obliquity of the axis Z61 with respect to the axis A41 and also allows these axes Z61 and A41 to be coaxial. This makes it possible to compensate for a possible slope of the floor surface 2 with respect to the horizontal plane, so that the platform 60 is oriented horizontally even in this case. In the absence of a ball joint 46, the axes A41 and Z61 are coaxial.

[0053] Each ear 70 protrudes from the main face 61, parallel to the axis Z61, more precisely along the direction Z. Preferably, no other element than the ears 70 protrudes from the main face 61, except for possible raised engravings formed on the surface of the main face 61.

[0054] Each ear 70 is disposed between the central axis Z61 and the closed contour 62, being adjacent to a respective portion 64 of the closed contour. Each portion 64 is called a primary "portion". Preferably, the primary portions 64 are diametrically opposite each other with respect to the central axis Z61.

[0055] In addition to the primary portions 64, the closed contour 62 comprises portions 65 referred to as "secondary portions". The secondary portions 65 are diametrically opposite each other with respect to the central axis Z61. Around the axis Z61, each secondary portion 65 is arranged between the two primary portions 64, that is to say, the first primary portion 64 is connected to the second primary portion 64 via one of the secondary portions 65.

[0056] The primary portions 64 are preferentially straight and parallel to each other. The secondary portions 65 are preferentially straight and parallel to each other.

[0057] As can be seen more clearly in Figures 3 and 4, the main face 61, the closed contour 62 and the ears 70 are advantageously of symmetrical shape and arrangement with respect to the central axis Z61.

[0058] As more clearly seen in [Fig. 5], each ear 70 comprises a curved wall 71, called the "primary curved wall", a curved wall 72, called the "secondary curved wall", and preferably a wall 73, called the "intermediate wall", a wall 74, called the "primary end wall", a wall 75, called the "secondary end wall", a wall 76, called the "primary transverse wall", a wall 77, called the "secondary transverse wall", and a rib 78, which project from the main face 61, parallel to the axis Z61. The walls 71 and 72, and the walls 73 to 77 and the rib 78 if provided, advantageously form a single continuous wall along the main face 61, advantageously along a closed contour around an axis parallel to the axis Z61.In particular, wall 74 connects walls 76 and 71, wall 71 connects walls 74 and 73, wall 73 connects walls 71 and 72, wall 72 connects walls 73 and 75, wall 75 connects walls 72 and 77, wall 77 connects wall 75 and rib 78, and rib 78 connects walls 77 and 76. Preferably, along axis Z61, walls 71 and 72, and, if provided, walls 73 to 77, are the same height, while rib 78 is shorter. Preferably, walls 71 and 72, as well as walls 73 to 77 and rib 78 belonging to the first ear 70, are symmetric respectively to walls 71 and 72, and 73 to 77 and rib 78 belonging to the second ear 70, with respect to the central axis Z61.

[0059] Regarding the walls 71 to 77 and the rib 78, the word "curve" designates a curvature around an axis parallel to the central axis Z61, that is to say, a curve in orthogonal projection on the main face 61. The word "straight" is also considered in orthogonal projection on the main face 61.

[0060] The primary curved wall 71 and secondary curved wall 72 are curved so as to be convex in the direction of the central axis Z61. Preferably, as shown in [Fig. 5], each wall 71 and 72 is curved along a respective circular arc, i.e., has a constant radius of curvature. Preferably, each wall 71 and 72 has a distinct axis of curvature Z71 and Z72, the axes C71 and C72 being arranged beyond the walls 71 and 72 from the central axis Z61.

[0061] By symmetry, for any given portion of the wall 71 of the first ear 70, there exists a corresponding portion of the wall 71 of the second ear 70 which is parallel and opposite to the given portion. Therefore, as shown in the three views A, B and C of [Fig. 3], the head 50 is configured to receive a joist 10 bearing against the face 61 of the platform 60, in a simple joist configuration. In this case, the joist 10 is received between the two ears 70, the respective primary curved wall 71 of each ear 70 then receiving the joist 10 in lateral support of the primary curved wall 71, while the joist 10 is supported by the main face 61 along the axis Z61 and is arranged between the two ears 70. With regard to a joist 10, by "lateral support", we mean a support along the direction Y or in the opposite direction to the direction Y.Thanks to the curved shape of the primary curved walls 71, the joist 10 can be pivoted relative to the head 50 around an axis parallel to the central axis Z61, until it reaches a position where the joist 10 is centered on the central axis Z61 while still bearing laterally against the primary curved wall 71. By symmetry of the lugs 70, the joist 10, regardless of its width, is centered on the axis Z61 when the joist 10 is in contact with the two opposing primary curved walls 71. With the joist 10 thus positioned, the head 50 can easily be fixed to the joist 10, for example by driving a screw through the wall 71 of the first lug 70 into the joist 10.

[0062] For each ear 70, the secondary curved wall 72 is shaped so that, for any given portion of the primary curved wall 71 of the same ear 70, there is a corresponding portion of the secondary curved wall 72 that is perpendicular to that given portion of the primary curved wall 71. Conversely, the primary curved wall 71 is shaped so that, for any given portion of the secondary curved wall 72 of the same ear 70, there is a corresponding portion of the primary curved wall 71 that is perpendicular to that given portion of the secondary curved wall 72. It follows that, for each ear 70, as shown in the three views A, B, and C of [Fig. 3], the head 50 is suitable for receiving, if necessary, a strut 20 The respective strut 20 rests on face 61 of the platform 60 in a simple joist configuration. This strut 20 is perpendicular to the joist 10, which is also supported by face 61 and interposed between the two lugs 70. The strut 20 advantageously bears longitudinally against the joist 10, that is, supported along the Y direction or in the opposite direction. The secondary curved wall 72 of the lug 70 then receives the strut 20 laterally. With regard to the strut 20, "lateral support" means that the strut 20 is supported along the X direction or in the opposite direction.Thanks to the curved shape of the secondary curved wall 72, and in particular because each given portion of the wall 72 is perpendicular to a corresponding portion of the wall 71 of the same flange 70, the brace 20 can be laterally supported against the secondary curved wall 72 regardless of the orientation and width of the joist 10 supported against the primary curved wall 71 and regardless of the width of the brace 20. This is because, for every portion of the primary curved wall 71 against which the joist 10 can be laterally supported, there is a corresponding portion of the secondary curved wall 72, for the lateral support of the brace 20, which is perpendicular to said portion of the primary curved wall 71. With the brace 20 thus positioned, the head 50 can easily be fixed to the brace, for example, by driving a screw through the wall into the brace 20. 72. .

[0063] Figure 5 shows an example of a given portion P71 of the wall 71 and a corresponding portion P72 of the wall 72, which is perpendicular to the given portion P71. The portion P71 selected in Figure 5 is the one against which the joist 10 rests laterally. It can be seen that the strut 20, perpendicular to the joist 10, rests laterally against the corresponding portion P72.

[0064] As shown in [Fig. 5], the curved wall 71 comprises an opposite end 81 and end 83. The curved wall 72 comprises an opposite end 82 and end 84. The walls 71 and 72 are connected by the intermediate wall 73 via the ends 81 and 82, while the ends 83 and 84 are opposite. A given portion of the wall 71 at end 83 is perpendicular to a corresponding portion of the wall 72 at end 82. A given portion of the wall 71 at end 81 is perpendicular to a corresponding portion of the wall 72 at end 84.

[0065] Preferably, as shown in [Fig. 5], the secondary curved wall 72 is folded down towards the first primary portion 64 of the contour 62 relative to the primary curved wall 71. For the secondary curved wall 72 to be folded down relative to the primary curved wall 71, the respective ends 81 and 82 of the walls 71 and 72 are preferably inclined relative to each other in a direction that brings the wall 72 closer to the wall 71. By folding down the secondary curved wall 72 relative to the primary curved wall 71, each ear 70 is particularly compact and occupies little space on the main face 61.

[0066] Preferably, as shown in [Fig.5], the radius of curvature of the wall 72 is smaller than the radius of curvature of the wall 71, which further increases the compactness of the ear 70. Preferably, the axes of curvature C71 and C72 are not coincident.

[0067] For each ear 70, the intermediate wall 73 is arranged opposite the primary portion 64 corresponding to that ear 70 and the central axis Z61. The walls 71 and 72 are connected to each other via the intermediate wall 73. The intermediate wall 73 extends tangentially from the end 81 to the wall 71. The intermediate wall 73, which is straight, is then connected to the wall 72 by another intermediate wall 79, which is curved and convex, allowing the wall 72 to be folded back relative to the wall 71. Due to the symmetry, the intermediate walls 73 of the two ears are parallel and face each other, although offset from each other. As shown in view A of [Fig.[3] When a joist 10 of maximum width, for example 80 mm, is received between the two lugs 70 bearing on the face 61, then said joist 10 is laterally supported on the end 81 of the wall 71, and is also laterally supported flat against the intermediate wall 73. The distance between the walls 73 of the two lugs 70, measured perpendicular to said walls 73, is provided to be equal to the maximum permissible width of joist 10, for example 80 mm. Since joists 10 of maximum width are a common type of joist, a large contact area with the intermediate walls 73 is thus ensured, without precluding the possibility that joists 10 of any width less than this maximum width may be laterally supported against intermediate portions of the wall 71, as shown in view B of [Fig. 3].

[0068] For each ear 70, the primary extremal wall 74 extends tangentially from the end 83 to the wall 71. The primary extremal wall 74, which is straight, is then connected to the wall 76 by another intermediate wall 80, which is curved and convex, allowing the wall 76 to be folded back relative to the wall 74 in the direction of the portion 64 of the contour 62. Due to the symmetry, the walls 74 of the two ears 70 are parallel and face each other, although offset from each other. As shown in view C of [Fig.3], when a joist 10 of minimum width, for example 40 mm, is received between the two ears 70 bearing on the face 61, then said joist 10 is laterally supported on the end 83 of the wall 71, and is also laterally supported flat against the primary extremity wall 74.It is assumed that the distance between the walls 74 of the two ears 70, measured perpendicular to said walls 74, is equal to the minimum permissible joist width 10, for example 40 mm. The joists 10 have a minimum width. being a common type of joist, a large contact area with the walls 74 is thus ensured, without giving up the possibility that joists 10 of any width greater than this minimum width can be received in lateral support against intermediate portions of the wall 71, as shown in view B of [Fig.3].

[0069] For each ear 70, the secondary extremity wall 75 extends tangentially from the end 84 to the wall 72. The secondary extremity wall 75, which is straight, is then connected to the wall 77 by another intermediate wall 85, which is curved and convex, allowing the wall 77 to be folded back relative to the wall 75. In other words, the wall 77 is inclined relative to the wall 74 in the direction of the primary portion 64 of the contour. Due to symmetry, the walls 75 of the two ears 70 are parallel. Due to the angular relationships between the walls 71 and 72, the walls 73 and 75 are perpendicular. As shown in view A of [Fig.[3] when the maximum-width joist 10 is received between the two ears 70 and a strut 20, here of the same width, is also supported on the face 61, then the strut 20 is laterally supported on the end 84 of the wall 72, and is also laterally supported flat against the secondary end wall 75. Since maximum-width joists 10 are a common type of joist, a large contact surface between the strut 20 and the wall 75 is thus ensured, without precluding the possibility that, for joists 10 of intermediate width, the strut 20 may be laterally supported against intermediate portions of the wall 72, as shown in view B of [Fig. 3].

[0070] As shown in [Fig. 4], for each ear 70, the primary transverse walls 76 and secondary transverse walls 77 are straight and parallel to each other, facing in opposite directions. For each ear 70, the walls 71 to 75 and the rib 78 are all arranged between the walls 76 and 77. The primary transverse wall 76 of the first ear 70 and the secondary transverse wall 77 of the second ear 70 are coplanar with a first coplanar plane P76. The primary transverse wall 76 of the second ear 70 and the secondary transverse wall 77 of the first ear 70 are coplanar with a second coplanar plane P76 parallel to the first coplanar plane P76. Preferably, the secondary portions 65 of the contour 62 are parallel to the walls 76 and 77. Each coplanarity plane P76 is arranged between one of the portions 65 and the axis Z61.

[0071] Preferably, these walls 76 and 77 are used in a double joist arrangement shown in [Fig. 4], which is distinct from the single joist arrangements shown in [Fig. 3]. In a double joist arrangement, a first joist 10 rests against the main face 61 and is laterally supported against the respective walls 76 and 77 of the two ears 70, and a second joist 10 rests against the main face 61 beyond the ears 70 relative to the first joist 10 and is laterally supported against the other walls 77 and 76 respective of the two ears. In doing so, each joist 10 covers one of the portions 65, or is arranged between this portion 65 and the walls 76 and 77 against which said joist is laterally supported. In this configuration, the two lugs 70 are interposed between the joists 10, and neither joist 10 is positioned between the two lugs 70. The joists 10 are not traversed by the axis Z61, which extends between the two joists 10. Thanks to these arrangements, the double joist system is particularly easy, since a single support 40 supports both joists 10, and the positioning of the joists 10 is easy to achieve, ensuring their parallelism and center-to-center spacing, as it is guided by the two pairs of walls 76 and 77. The head 50 can easily be fixed to the two joists 10, for example, using screws driven into the joists 10 through the walls 76 and 77.In a double joist system, the two joists 10 are oriented, relative to the platform 60 and around the axis Z61, in a direction that is transverse to the single joist 10 in a single joist system. In practice, rotating the head 50 by approximately a quarter turn relative to the base 41 allows the head to be adapted for a double joist system when it was previously adapted for a single joist system, and vice versa, making the head 50 particularly versatile.

[0072] Preferably, the P76 planes are spaced between 30 and 70 mm apart, preferably 50 mm, in order to obtain a predetermined center distance for the two joists 10.

[0073] Preferably, each coplanarity plane P76, disposed between the axis Z61 and one of the portions 65, is distant from this portion 65 by a distance d65 of at least 32 mm, preferably of at least 64 mm, the distance being measured perpendicular to the coplanarity plane P73. This ensures that the joist 10 rests on a substantial area of ​​the main face 61, in particular, at least 80% of the minimum width of the joist 10, or even at least 80% of the maximum width of the joist 10, to prevent the face 61 from imparting too intense local torsion to the joist 10 under the weight of the floor surface 30. The portion of the main face 61 which supports the joist 10, that is to say the portion which starts at the portion 65 and which is delimited by the plane P76 closest to this portion 65, has an area of ​​at least 25 cm2, so that the joist 10 is solidly supported even in double joisting.

[0074] It should be noted that the walls 76 and 77 for the double joist system are distinct from the wall 72, and preferably from the wall 75, reserved for the brace 20 in single joist system.

[0075] The rib 78 is preferably straight. The rib 78 is preferably parallel to the primary portion 64 of the closed contour 62, preferably projecting from the primary portion 64, over the entire length of the primary portion 64. Rib 78 of the first ear 70 is advantageously parallel to rib 78 of the second ear 70. For each ear 70, rib 78 is positioned opposite the intermediate wall 73 of the same ear. Rib 78 is intended to structurally reinforce ear 70. Rib 78 is not designed to bear against a joist 10 or a brace 20.

Claims

Demands

1. Head (50), for a block (40) of a raised floor (1), the head (50) comprising: • a platform (60), which includes a main face (61) delimited by a closed contour (62) belonging to the platform (60) and being perpendicularly crossed by a central axis (Z61); and • a first ear (70), integral with the plate (60), projecting from the main face (61) between the central axis (Z61) and a first primary portion (64) of the closed contour (62) and comprising a primary curved wall (71) and a secondary curved wall (72), both extending parallel to the central axis (Z61) from the main face (61) and being curved so as to be convex in the direction of the central axis (Z61), the secondary curved wall (72) being shaped so that, for any given portion (P71) of the primary curved wall (71), there exists a corresponding portion (P72) of the secondary curved wall (72) which is perpendicular to this given portion (P71).

2. Head (50) according to claim 1, wherein: • the first ear (70) comprises an intermediate wall (73), extending parallel to the central axis (Z61) from the main face (61), the primary curved wall (71) and the secondary curved wall (72) of the first ear (70) being connected via the intermediate wall (73); and • preferably, said intermediate wall (73) is straight and extends tangentially from said primary curved wall (71).

3. Head (50) according to claim 2, wherein the first ear (70) comprises a primary end wall (74), extending parallel to the central axis (Z61) from the main face (61), extending tangentially from the primary curved wall (71) of the first ear (70), said primary curved wall (71) connecting the intermediate wall (73) of the first ear (70) to said primary end wall (74).

4. Head (50) according to any one of claims 2 or 3, wherein the first ear (70) comprises a secondary extremal wall (75), extending parallel to the central axis (Z61) from the main face (61), extending tangentially from the secondary curved wall (72) of the first ear (70) and being perpendicular to the intermediate wall (73) of the first ear (70).

5. Head (50) according to any one of the preceding claims, wherein the first ear (70) comprises a rib (78), extending parallel to the central axis (Z61) from the main face (61), along the first primary portion (64) of the closed contour (62).

6. Head (50) according to any one of the preceding claims, wherein the head (50) comprises a second ear (70), integral with the plate (60), projecting from the main face (61) between the central axis (Z61) and a second primary portion (64) of the closed contour (62) diametrically opposite to the first primary portion (64) of the closed contour (62) with respect to the central axis (Z61), the second ear (70) comprising a primary curved wall (71) and a secondary curved wall (72), the primary curved walls (71) being symmetrical with respect to the central axis (Z61) and the secondary curved walls (72) being symmetrical with respect to the central axis (Z61).

7. Head (50) according to claim 6, wherein: • the closed contour (62) comprises a secondary portion (65), arranged between the first primary portion (64) and the second primary portion (64); • the first ear (70) comprises a primary transverse wall (76), extending parallel to the central axis (Z61) from the main face (61) and being straight; • the second ear (70) comprises a secondary transverse wall (77), extending parallel to the central axis (Z61) from the main face (61) and being straight; and • the primary transverse wall (76) and the secondary transverse wall (77) are coplanar with a coplanarity plane (P76) arranged between the central axis (Z61) and the secondary portion (65), a distance (d65) of at least 32 millimeters, measured perpendicular to the coplanarity plane (P76), separating the coplanarity plane (P76) and the secondary portion (65).

8. Head (50) according to claim 7, wherein the first ear (70) comprises a secondary transverse wall (77), extending parallel to the central axis (Z61) from the main face (61) and being straight, the secondary transverse walls (77) being symmetrical with respect to the central axis (Z61).

9. Plot (40), comprising: • the head (50), according to any one of the preceding claims; • a base (41), configured to rest on a ground surface (2); and • a linkage (42), through which the base (41) supports the head (50) so that the position of the head (50) relative to the base (41) is adjustable, the base (41) being traversed by the central axis (Z61).

10. Raised floor (1), comprising: • the block (40) according to claim 9; • a joist (10), supported by the main face (61) and laterally supported against the primary curved wall (71) of the first ear (70); and • a brace (20), perpendicular to said joist (10), supported by the main face (61) and laterally supported against the secondary curved wall (72) of the first ear (70).

Images