Leveling pin for pouring a concrete screed

Abstract

Leveling pin for pouring a concrete screed The invention relates to a leveling pin 1 for the operation of pouring a concrete screed carried out on a support surface, the pin 1 comprising: an axial and vertical cylindrical support structure 2 whose lower end comprises a base 22 forming an interface with the support surface, a level marker 3 comprising an axial and circular through-orifice 31 arranged to be crossed by the support structure 2, on the one hand, the cylindrical surface of the support structure 2 carrying a thread 212 with a determined pitch and, on the other hand, the orifice 31 of the level marker 3 comprising an inner surface which carries a thread whose pitch is identical to that of the thread 212 of the cylindrical surface of the support structure 2 so that the interaction between the two parts 2,3 by their respective threads gives mobility to the level marker 3 along the axis of the supporting structure 2 by pivoting the level marker 3 around the axis of the cylindrical portion 21 of the supporting structure 2. Figure to be published with the abstract: Fig. 1,

Description

Title of the invention: Leveling rod for pouring a concrete screed

[0001] The present invention relates to the field of leveling devices used in the context of an operation of pouring a concrete screed onto a support surface and more particularly to the field of leveling rods used in the context of such an operation.

[0002] When pouring a concrete screed onto a support surface, it is imperative for the operators to ensure that the liquid, otherwise viscous, concrete is uniformly distributed over the support so as to allow the creation of a surface arranged in a substantially horizontal plane at the level of the entire casting surface. The uniform distribution of the concrete for the formation of such a horizontal surface notably involves, prior to pouring the concrete, the installation of several vertical markers carried by respective rods at different points on the support surface. The markers of each of these rods are thus positioned at the same level, in the same horizontal plane, to allow the operator to ensure the flatness of the surface of the poured concrete. After pouring, these different rods are removed and the surface of the concrete is smoothed before the latter solidifies.

[0003] Conventionally, these rods which form level markers to check the flatness of the poured concrete, are made in the form of a tripod structure which positions a vertical axis adjustable in height and whose lower end carries a horizontal disc. This horizontal disc thus forms a marker to identify, at the location of the rod, the height of a horizontal plane to locate the positioning of the upper surface of the concrete during its pouring. However, to the extent that the verification of the flatness of the poured concrete requires the use of several rods distributed or spread over the entire support structure, the rods formed by tripods then have the disadvantage of being particularly bulky and therefore cumbersome. The size of these rods is increased by their number required on a construction site. Also, for workers, the handling of these rods is complicated.

[0004] To overcome this constraint, straight pins of simplified design have been produced in the form of a vertically arranged axial rod which passes through the orifice of a washer. This washer which forms a level marker has an orifice whose internal width is less than or equal to the corresponding part of the axial rod. Thus, this washer is held in position at a determined level along the axial rod by the friction and pressure exerted by the internal edge of the hole against the surface of the axial rod. However, when using these vertical rods, and unlike tripod rods, the axial vertical rod which carries the level marker washer is likely to be at least partially embedded in the pouring concrete. Thus, however simple the design may be, this type of vertical rod shows that after several uses, solidified concrete residues are likely to remain stuck to the rod so that the movement of the washer under friction and pressure along the axis of the rod to adjust the position of the level marker is prevented or blocked.

[0005] The present invention aims to overcome these drawbacks by proposing a rod of simple design whose level marker is associated with a position adjustment mechanism configured to at least partially overcome any possible presence of solidified concrete residues on the rod.

[0006] The invention thus relates to a leveling rod for the operation of pouring a concrete screed made on a support surface, characterized in that this rod comprises: - a first part which produces a substantially axial supporting structure comprising at least one cylindrical portion of circular section intended to be positioned along a substantially vertical axis, this supporting structure having a free upper end and a lower end comprising a base arranged to form a contact interface with the support surface, - a second part which produces a level marker comprising an axial and circular through-hole centered on an axis oriented according to the height of the level marker, this orifice being arranged to be crossed by the cylindrical portion of the supporting structure and to interact with the cylindrical surface of this cylindrical portion, and in that, on the one hand, the cylindrical surface of the cylindrical portion of the supporting structure carries a thread with a determined pitch and, on the other hand, the orifice of the level marker comprises an interior surface which carries a thread whose pitch is identical to that of the thread of the cylindrical surface of the supporting structure so that the interaction between the two parts by their respective threads gives mobility to the level marker along the axis of the supporting structure by pivoting the level marker around the axis of the cylindrical portion of the supporting structure.

[0007] The invention also relates to an assembly for producing a concrete screed comprising: - a support surface intended to receive a concrete screed, - at least one leveling pin according to the invention positioned by its base against a portion of the supporting surface, the level marker being placed at a height from the cylindrical portion of the supporting structure defining a flush plane with the upper surface of the concrete screed poured in an area surrounding the pin.

[0008] The invention will be better understood from the following description, which relates to the preferred embodiments, given as non-limiting examples, and explained with reference to the appended schematic drawings, in which:

[0009] [Fig-1] is a schematic representation of an example of a rod according to the invention in which the supporting structure has a collar at its base,

[0010] [Fig.2] is a schematic representation according to a sectional view of an example of pin as illustrated in [Fig.l],

[0011] [Fig.3] is a schematic representation of an example of a level marker for a gauge according to the invention, illustrated, on the one hand, according to a view oriented along the pivot axis of the level marker and, on the other hand, according to a perspective view,

[0012] [Fig.4] is a schematic representation of an example of a supporting structure without a collar for a rod according to the invention, illustrated, on the one hand, according to a side view oriented along an axis perpendicular to the axis of the supporting structure and, on the other hand, according to a partially sectional view.

[0013] It should be noted that, in the present document, the expression "solidified concrete residues" refers to concrete residues which would result from projections or from possible negligence in the cleaning of the rod 1 of the invention after its use in the context of a concrete pouring operation. Such residues do not relate to a substantially homogeneous layer of concrete which would have remained on the rod 1 of the invention and would have solidified there due to a lack of cleaning of this rod 1 after its use.

[0014] The invention relates to a leveling rod 1 for the operation of pouring a concrete screed made on a support surface, characterized in that this rod 1 comprises: - a first part which produces a substantially axial supporting structure 2 comprising at least one cylindrical portion 21 of circular section intended to be positioned along a substantially vertical axis, this supporting structure 2 having a free upper end 23 and a lower end comprising a base 22 arranged to form a contact interface with the support surface, - a second part which produces a level 3 marker comprising an axial and circular through orifice 31 centered on an axis oriented according to the height of the level 3 marker, this orifice 31 being arranged to be crossed by the cylindrical portion 21 of the supporting structure 2 and to interact with the surface cylindrical 211 of this cylindrical portion 21, and in that, on the one hand, the cylindrical surface 211 of the cylindrical portion 21 of the supporting structure 2 carries a thread 212 with a determined pitch and, on the other hand, the orifice 31 of the level marker 3 comprises an interior surface 311 which carries a thread 312 whose pitch is identical to that of the thread 212 of the cylindrical surface 211 of the supporting structure 2 so that the interaction between the two parts 2, 3 by their respective threads 212, 312 gives mobility to the level marker 3 along the axis of the supporting structure 2 by pivoting the level marker 3 around the axis of the cylindrical portion 21 of the supporting structure 2.

[0015] The rod 1 according to the invention involves a mechanism for adjusting the position of the level marker 3 along the axis of the supporting structure 2 by cooperation of the threads 212, 312 carried by the inner surface 311 of the orifice 31 and the cylindrical or peripheral surface 211 of the supporting structure 2. The supporting structure 2 carries a base 22 at one end of its axis so that the latter creates a contact interface with the support surface on which the concrete is intended to be poured. Also, in the context of use of the rod 1 of the invention, the supporting structure 2 is configured to be mounted in a vertical position by means of its base 22 on the support surface intended to receive the concrete.The position of the level marker 3 is then adjusted along the axis of the supporting structure 2 by axial pivoting of the level marker 3 so that, by cooperation of the threads 212, 312 of the level marker 3 and of the supporting structure 2, the level marker 3 is translated on the supporting structure 2. In the vertical position of the axis of the supporting structure 2, the level marker 3 and the supporting structure 2 are in contact only by their respective threads 212, 312 which are superimposed, so that the lower surface of the threads 312 of the level marker 3 rests by gravity on the upper surface of the threads 212 of the supporting structure 2. Preferably, in a plane in section perpendicular to the axis of the supporting structure 2, the width of the orifice 31 in a measurement direction is greater than the width of the corresponding part of the cylindrical portion 21 of the supporting structure 2 in this same direction of measure.Likewise, preferably, along an axis substantially parallel to the axis of the cylindrical portion 21 of the supporting structure 2, the height of the threads of the threads 212, 312 carried by a first of the elements between the supporting structure 2 and the level marker 3, is less than the height of the groove formed by two consecutive threads of the threads 212, 312 carried by the second of the elements between the supporting structure 2 and the level marker 3 so that, along the axis of the supporting structure 2, a clearance is likely to exist between the supporting structure 2 and the level marker 3. In addition, in the context of the rod 1 according to the invention, the complementary threads 212, 312 of the supporting structure 2 and the level marker 3 are defined so as to have a . screw thread or a slope sufficiently low so that, when the supporting structure 2 is positioned vertically, the sole frictional force of the lower surface of the threads 312 of the level 3 marker against the upper surface of the threads 212 of the supporting structure 2 is sufficient to maintain the level 3 marker in position relative to the supporting structure 2.

[0016] It should be noted that, within the framework of the mechanism for adjusting the position of the level marker 3 along the axis of the supporting structure 2 of the rod 1 of the invention, the cooperation of the threads 212, 312 imposes an axial pivoting of the level marker 3 so that it is moved on the axis of the supporting structure 2. Thus, when the supporting structure 2 is positioned vertically, the vertical translational force of the level marker 3 imposed by the force of gravity generates a rotational torque of the level marker 3 attenuated by the pitch of the threads 212, 312. This rotational torque is then sufficiently attenuated to be less than the friction force between the surfaces of the threads 212, 312 so that the level marker 3 remains held in position on the supporting structure 2.Likewise, it should be noted that, thanks to the pitch of the threads 212, 312 carried by the two elements of the rod 1, the torque of the level 3 marker produced by the rotation exerted by an operator generates an amplified translational force along the axis of the supporting structure 2. Also, in the event of the presence of solidified concrete residues on the rod 1, in particular at the level of the cylindrical portion 21 of the supporting structure 2, the pivoting of the level 3 marker by an operator is likely to be sufficient to generate a translational force of the level 3 marker on the supporting structure 2 capable of degrading the solidified concrete residue and / or of forcing the displacement of the level 3 marker over the solidified concrete residue.In a complementary manner, when the rod 1 of the invention has a clearance between the threads of the threads 212, 312 of the supporting structure 2 and of the level marker 3, the space between the cooperating threads allows the presence of solidified residues of concrete at this interaction interface between the two elements of the rod 1 so that the displacement of one thread 312 by the other 212 is not affected or only partially affected. Similarly, in a complementary manner, when the width of the orifice 31 and therefore the width of the orifice 31 at the thread of at least one of the threads 312, in a measurement direction is greater than the width of the corresponding part of the cylindrical portion 21 of the supporting structure 2 in this same measurement direction, a space exists between the inner surface 311 of the orifice 31 and the cylindrical or peripheral surface 211 of the supporting structure 2.Such a space thus allows the presence of solidified concrete residues between the two elements of the rod 1 without the movement of the threads 212, 312 between them being significantly affected.

[0017] It should be noted that, within the framework of the adjustment mechanism of the rod 1 of the invention, the threads 212, 312 of each of the elements of the rod 1, namely the supporting structure 2 and the level marker 3, are likely to comprise a single thread or several threads. Preferably, the threads 212, 312 of each of the elements of the rod 1 comprise one to six threads. The production of threads 212, 312 comprising several threads makes it possible to multiply the friction surfaces and therefore to increase the friction force between the supporting structure 2 and the level marker 3 when the slope of the threads 212, 312 is too great and is not able to effect a sufficient attenuation of the force in vertical translation that the force of gravity imposes on the level marker 3.Also, despite a limited attenuation of the rotational torque of the level 3 marker, this torque is able to be lower than the frictional force between the surfaces of the threads 212, 312 so that the level 3 marker remains held in position on the supporting structure 2.

[0018] According to an example relating to a construction variant of the leveling rod 1 according to the invention, the level marker 3 has at least one portion with a substantially planar arrangement. This planar arranged portion thus provides a reference plane at the rod 1 for pouring the concrete onto the support surface and adjusting the upper surface of the poured concrete to the required height. According to a specific example of this construction variant, the level marker 3 has a substantially planar arrangement. By way of example, the level marker 3 is arranged to have a disc-shaped configuration. However, at the orifice 31, at least a portion of the level marker 3 has an arrangement in the form of a sleeve whose inner surface 311 comprises a height sufficient to carry at least one thread 312.

[0019] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the level marker 3 has a substantially annular arrangement. The peripheral edge of the level marker 3 then has a substantially circular arrangement. The orifice 31 of the level marker 3 is then preferentially positioned substantially centered on the level marker 3 so that the level marker 3 has a structure whose configuration is comparable to the shape of a washer.

[0020] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the variants detailed above, the level marker 3 comprises a slot 32 arranged between its peripheral surface 33 and the inner surface 311 of the orifice 31 and arranged over the entire height of the level marker 3. Such a slot 32 thus makes the inner surface 311 of the orifice 31 communicate with the periphery of the level marker 3 so that, in a plane perpendicular to the axis of the orifice 31, the level 3 marker is able to withstand forces likely to deform its structure while limiting the possibility of it breaking. Also, in the context of such deformation, the opposite edges or surfaces of the slot 32 which face each other in the thickness and height of the level 3 marker are likely to be moved apart and / or brought closer to each other. Thus, the level 3 marker is able to withstand a deformation widening the perimeter of its orifice 31 in the event of the presence of a localized excess thickness at a portion of the cylindrical or peripheral surface 211 of the supporting structure 2. The level 3 marker is then able to withstand a possible deformation of its structure to allow its movement over any solidified residues of concrete present on the surface 211 of the supporting structure 2.

[0021] According to another example relating to a specific construction variant of the previously detailed variant, the level 3 marker is made of a rigid material supporting deformation. As an example of construction, the rigid material used for the production of the level 3 marker and / or the entire rod 1 is a plastic. However, other alternative materials are likely to be envisaged as long as these materials, on the one hand, have properties identical or similar to those necessary for the construction of a level 3 marker or an element of the rod 1 and, on the other hand, are compatible with use in the context of an operation of pouring concrete onto a support surface.Also, these materials are likely to correspond to resins or metals or even alloys such as based on aluminum or steel possibly coated with aluminum, brass or zinc or even a combination of several of the materials stated. For example, the material(s) used for the production of one or other of the elements 2, 3 of the rod 1 are selected to allow the production of at least one of these elements 2, 3 by a molding and / or additive manufacturing operation.

[0022] According to another example relating to a specific construction variant of the previously detailed variant, along at least one axis perpendicular to the axis of the supporting structure 2, the diameter of the inner surface 311 of the orifice 31 of the released level 3 marker is slightly smaller than the outer diameter of the cylindrical portion 21 of the supporting structure 2 so that at least two opposite portions of the inner surface 311 arranged on either side of the axis of the orifice 31 are able to pinch the axial portion 21 of the supporting structure 2. According to this construction variant, the pinching of the supporting structure 2 by a portion of the orifice 31 of the level 3 marker makes it possible to provide an additional force for maintaining the level 3 marker in a determined position along the axis of the supporting structure 2. Preferably ... 311 of the orifice 31 of the released level marker 3 is slightly smaller than the outer diameter of the cylindrical portion 21 of the supporting structure 2 along a reduced number of axes perpendicular to the axis of the supporting structure 2. Also, within the framework of this construction variant, ideally, the diameter of the inner surface 311 of the orifice 31 of the released level marker 3 is slightly smaller than the outer diameter of the cylindrical portion 21 of the supporting structure 2 along a single axis perpendicular to the axis of the supporting structure 2. This pinching of the supporting structure 2 by the level marker 3 along a single axis thus makes it possible to produce additional friction between the two elements 2, 3 of the rod 1 for maintaining these two elements 2, 3 in position without this significantly affecting the operation of the adjustment mechanism of the rod 1 in the presence of solidified concrete residues on the rod 1.

[0023] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the screw pitch has a slope comprised in an interval of 15 millimeters to 50 millimeters per revolution, preferably comprised in an interval of 20 millimeters to 40 millimeters per revolution, ideally of the order of 30 millimeters per revolution. A slope arranged in such an interval allows the production of a screw pitch of the threads 212, 312 which is sufficient so that, on the one hand, the level marker 3 is retained in position and, on the other hand, the positioning of the level marker 3 along the supporting structure 2 does not impose too high a number of rotations of the level marker 3.

[0024] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the peripheral surface 33 of the level marker 3 comprises a handling interface 331 of the level marker 3. By way of example, such a handling interface 331 is produced in the form of at least one projection extending radially relative to the orifice 31 of the level marker 3. This projection is capable of taking the form of a pin, the gripping of which by a user or an operator is facilitated to allow the rotation of the level marker 3 around the axis of the supporting structure 2. According to another construction example, the handling interface 331 of the level marker 3 comprises several projections distributed over the periphery of the level marker 3.Preferably, these projections are distributed in a substantially homogeneous manner around the periphery of the level 3 marker.

[0025] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the variants detailed above, the cylindrical portion 21 of the supporting structure 2 has a tubular arrangement. This tubular construction makes it possible to limit the quantity of material for the production of this structure 2 so that, on the one hand, the production cost of this element 2 of the rod 1 is reduced and, on the other hand, the weight of this supporting structure 2 is lightened and facilitates the handling and transport of a large number of rods 1 for a worker on a construction site. Preferably, this tubular arrangement is not limited to the cylindrical portion 21 alone but is produced along the entire supporting structure 2. According to a specific example of this construction variant, the tubular arrangement of the supporting structure 2 has an orifice at each of the lower and upper ends 23 of the structure 2. Also, during the pouring operation, the concrete is able to enter the interior of the lower part of the tubular portion.The presence of an orifice at the upper end 23 of the supporting structure 2 then allows for easier flow of the concrete when the rod 1 is removed from the poured concrete screed before it is stiffened. In addition, the presence of an orifice at each end of the supporting structure 2 provides easy access for cleaning the interior volume of the tubular portion of the supporting structure 2.

[0026] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the cylindrical surface 211 of the cylindrical portion 21 near the free upper end 23 of the supporting structure 2 is devoid of thread 212. Such an arrangement has a height of the supporting structure 2 at which the supporting structure 2 is able to be inserted through the orifice 31 of the level marker 3 without it being necessary for the operator to carry out a positioning opposite the respective threads 212, 312 of the two elements 2, 3 of the rod 1. Also, the association of the level marker 3 with the supporting structure 2 by an operator is facilitated by requiring only a simple alignment of the respective axes of the cylindrical portion 21 of the supporting structure 2 and of the orifice 31 of the level 3 marker.Once the level marker 3 is fitted onto the supporting structure 2, the cooperation between the respective threads 212, 312 of the two elements 2, 3 of the rod 1 is obtained by pivoting the level marker 3 until it is positioned opposite the threads of each of the threads 212, 312 of the elements 2, 3 of the rod 1. Thus, the operator is able to install the adjustment mechanism of the rod 1 without it being necessary for him to operate jointly, on the one hand, an alignment of the respective axes of the supporting structure 2 and the orifice 31 of the level marker 3 and, on the other hand, a facing of the threads 212, 312 of the two elements 2, 3 of the rod 1.

[0027] According to another example relating to a variant of construction of the leveling rod 1 according to the invention and capable of being combined with one or other of the variants previously detailed, at least a portion of the peripheral edge of the lower end of the supporting structure 2 has a collar widening the surface of the base 22 relative to a section of the cylindrical portion 21 in a plane perpendicular to the axis of the supporting structure 2. This collar widens the surface of the lower end of the supporting structure 2 which forms the base 22 and thus allows optimization of the maintenance of the rod 1 in a vertical position on the support surface. Preferably, the collar has a bearing surface of the base 22 which extends radially relative to the rest of the supporting structure 2 in the form of a disc portion which surrounds the lower end of the supporting structure 2.According to an alternative construction, this collar takes the form of one or more tabs or tongues arranged radially in a plane perpendicular to the axis of the supporting structure 2 in different directions from the lower end of the supporting structure 2.

[0028] According to another example relating to a construction variant of the leveling rod 1 according to the invention and capable of being combined with one or other of the variants detailed above, at the base 22, the contact interface with the support surface carries at least one anchoring point 223 arranged along an axis substantially parallel to the axis of the supporting structure 2. The at least one anchoring point 223 is configured to allow its insertion into the support surface intended to carry the rod 1 and to receive the concrete screed. This at least one anchoring point 223 provides additional stability to ensure the vertical maintenance of the supporting structure 2 and prevent it from falling during the pouring of the concrete onto the support surface.This at least one anchoring point 223 is capable of being positioned in the center of the base 22, that is to say in a manner aligned with the axis of the supporting structure 2 or, alternatively, offset relative to this axis, in particular when the supporting structure 2 is tubular and has an orifice at its lower end. When the base 22 comprises several anchoring points 223, these are preferentially distributed at the level of different portions of the base 22 spaced apart from each other so as to optimize the anchoring of the supporting structure 2. It should be noted that the at least one anchoring point 223 has a tapered arrangement without a hook so as to allow a worker to remove the rod 1 from the support surface without encountering any difficulty.

[0029] It should be noted that both the collar and the at least one anchoring point 223 make it possible to reinforce the stability of the supporting structure 2 mounted vertically on the support surface, in particular with respect to forces or stresses exerted laterally against the surface of the rod 1. Such forces are likely to be exerted during the flow of concrete against the support surface intended to receive the screed, or even accidentally by a worker on the site.

[0030]

[0031] The invention also relates to an assembly for producing a concrete screed comprising: - a support surface intended to receive a concrete screed, - at least one leveling pin 1 according to the invention positioned by its base 22 against a portion of the support surface, the level marker 3 being placed at a height of the cylindrical portion 21 of the supporting structure 2 defining a flush plane of the upper surface of the concrete screed poured in an area surrounding the pin 1. Of course, the invention is not limited to the embodiments described and shown in the attached drawings. Modifications remain possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims

1. Leveling rod (1) for the operation of pouring a concrete screed made on a support surface, characterized in that this rod (1) comprises: - a first part which produces a substantially axial supporting structure (2) comprising at least one cylindrical portion (21) of circular section intended to be positioned along a substantially vertical axis, this supporting structure (2) having a free upper end (23) and a lower end comprising a base (22) arranged to form a contact interface with the support surface, - a second part which produces a level marker (3) comprising an axial and circular through-orifice (31) centered on an axis oriented according to the height of the level marker (3), this orifice (31) being arranged to be crossed by the cylindrical portion (21) of the supporting structure (2) and to interact with the cylindrical surface (211) of this cylindrical portion (21), and in that,on the one hand, the cylindrical surface (211) of the cylindrical portion (21) of the supporting structure (2) carries a thread (212) with a determined pitch and, on the other hand, the orifice (31) of the level marker (3) comprises an inner surface (311) which carries a thread (312) whose pitch is identical to that of the thread (212) of the cylindrical surface (211) of the supporting structure (2) so that the interaction between the two parts (2, 3) by their respective threads (212, 312) gives mobility to the level marker (3) along the axis of the supporting structure (2) by pivoting the level marker (3) around the axis of the cylindrical portion (21) of the supporting structure (2).,

2. Leveling pin (1) according to claim 1, characterized in that the level marker (3) comprises a slot (32) arranged between its peripheral surface (33) and the inner surface (311) of the orifice (31) and arranged over the entire height of the level marker (3).

3. Leveling pin (1) according to claim 2, characterized in that the level marker (3) is made of a rigid material which can withstand deformation.

4. Leveling pin (1) according to claim 3, characterized in that, along at least one axis perpendicular to the axis of the supporting structure (2), the diameter of the inner surface (311) of the orifice (31) of the released level marker (3) is slightly less than the outer diameter of the cylindrical portion (21) of the supporting structure (2) so that at least two opposite portions of the inner surface (311) arranged on either side of the axis of the orifice (31) are able to pinch the axial portion (21) of the supporting structure (2).

5. Leveling pin (1) according to one of the preceding claims, characterized in that the screw thread has a slope in the range of 15 millimeters to 50 millimeters per revolution.

6. Leveling pin (1) according to one of the preceding claims, characterized in that the peripheral surface (33) of the level marker (3) comprises a handling interface (331) of the level marker (3).

7. Leveling pin (1) according to one of the preceding claims, characterized in that the cylindrical portion (21) of the supporting structure (2) has a tubular arrangement.

8. Leveling pin (1) according to one of the preceding claims, characterized in that the cylindrical surface (211) of the cylindrical portion (21) near the free upper end (23) of the supporting structure (2) is devoid of thread (212).

9. Leveling pin (1) according to one of the preceding claims, characterized in that at least a portion of the peripheral edge of the lower end of the supporting structure (2) has a collar widening the surface of the base (22) relative to a section of the cylindrical portion (21) in a plane perpendicular to the axis of the supporting structure (2).

10. Leveling pin (1) according to one of the preceding claims, characterized in that, at the base (22), the contact interface with the support surface carries at least one anchoring point (223) arranged along an axis substantially parallel to the axis of the supporting structure (2).

11. Assembly for producing a concrete screed comprising: - a support surface intended to receive a concrete screed, - at least one leveling pin (1) according to one of claims 1 to 9 positioned by its base (22) against a portion of the support surface, the level marker (3) being placed at a height of the cylindrical portion (21) of the supporting structure (2) defining a flush plane of the upper surface of the concrete screed poured in an area surrounding the gauge (1).

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