BE1026736B1 - Masonry hook screw and method - Google Patents

Abstract

The invention relates to a tool to facilitate and accelerate the installation of masonry hooks in walls, in particular those comprising several layers (wall, insulation, facing). The tool comprises a tip adaptable to a screwdriver and / or a drill for the screwing of a masonry hook having a threaded rod along a screwing axis, the tip comprising a rotation axis, one end arranged to be tightened in the mandrel of the screwdriver and / or drill, the other end comprising means for holding and driving in rotation the masonry hook shaped to make the axis of rotation of the end piece correspond with the axis of screwing of the hook masonry. The invention also relates to a method of screwing a masonry hook using this nozzle.

Description

Masonry hook screw and method

BE2018 / 5762

The present application relates to the field of construction and in particular of masonry.

The construction standards implemented in recent decades have increased the requirements for the mounting of building walls, in particular exterior walls, and the associated insulation. For a building with a brick finish, you must first mount a support wall, for example in breeze blocks, cement blocks, terracotta bricks, concrete blocks, concrete veil or aerated concrete. A layer of insulation, usually in the form of panels, and affixed to the supporting wall, then a facing or covering, for example made of bricks, is mounted against the insulation. The insulation and facing must be secured to the supporting wall by masonry hooks. According to the standards, six to nine hooks per square meter, or even more, must be placed.

These hooks are generally stainless steel rods, one end of which is threaded to be screwed into a dowel of the supporting wall. The other end is generally curved, for example bent at 90 ° as illustrated in figure 1 or wavy as illustrated in figure 2. Between the two ends, the rod has a sufficient length, in the axis of the threaded end , to pass through the insulation layer, which can reach thirty to forty centimeters.

The implementation of these hooks is generally done using a pincer. The operator must hold the hook in place with one hand to hold the rod in the screwing axis and use the pincers with the other hand to transmit the screwing movement. This operation is tedious, tiring for the operator and takes a long time, increasing the duration and the cost of the construction of the wall.

The Applicant has therefore deemed it necessary to propose a tool to facilitate and speed up the installation of masonry hooks.

BE2018 / 5762

Solution of the invention

The present invention provides, for this purpose, a tip adaptable to a screwdriver and / or a drill for the screwing of a masonry hook having a threaded rod along a screwing axis, the tip comprising a rotation axis, one end arranged to be tightened in the mandrel of the screwdriver and / or drill, the other end comprising means for holding and driving in rotation the masonry hook shaped to match the axis of rotation of the bit with the screwing axis of the masonry hook.

The tip of the invention thus makes it possible to use the screwing power of an electric screwdriver, or of a drill (without percussion function) for screwing masonry hooks. The screwdriver and / or drill transmits to the hook, via the end piece of the invention, a rotary movement along a determined axis. It is imperative that the tip ensures the correspondence between the axis of rotation of the screwdriver / drill and the axis of the hook. This is all the more decisive for the quality of attachment of the hook that the rod of this hook is particularly long and can easily deform if this screwing operation is not carried out correctly.

The means for holding the masonry hook are preferably a cylinder in which is radially hollowed, over part of its height, a notch shaped so that the end piece impart to the hook the rotational movement of the screwdriver / drill when that it is activated. The notch is advantageously, the notch conforms at least in part to the shape of the unthreaded end of the hook rod.

The notch is in particular delimited by an axial wall, having substantially the width of a masonry hook in a plane parallel to the axis of the nozzle and close to the axis of rotation of the nozzle, a radial wall, having substantially the same width as the axial wall and perpendicular to the axis of the nozzle,

BE2018 / 5762 and two parallel walls in two planes perpendicular to the axial and radial walls and connected to the edges thereof so that all of the walls delimit a cavity, the axial and / or radial walls (being shaped so that the end (61; 81) unthreaded from the masonry hook rod follows, at least in part, the shape.

The invention also relates to a method of screwing into a wall a masonry hook having a threaded rod along a screwing axis, using a nozzle according to the invention, comprising the steps of:

- The tip is fixed to a drill and / or screwdriver by clamping its end in the chuck of the drill / screwdriver;

- the threaded end of the hook is placed against a wall, where it must be fixed;

- the drill and / or screwdriver is positioned so that the unthreaded end of the hook is inserted into the means for holding and rotating the masonry hook, so as to match the axis of rotation the end piece with the screwing axis of the masonry hook, and

- we activate the screwdriver / drill to rotate the hook to push the threaded rod into the wall.

The invention will be better understood using the following description of several implementations of the invention, with reference to the appended drawing, in which:

Figure 1 illustrates a form of masonry hook for screwing which the tip of the invention is intended;

- Figure 2 illustrates another form of masonry hook for screwing which the tip of the invention is intended;

Figure 3 is a perspective diagram of a tip of the invention;

- Figure 4 is a top view of the tip of Figure 3;

- Figure 5 is a sectional view of the tip of Figure 3;

- Figure 6 is the sectional view which a masonry hook is Figure 7 is a view in the invention;

- Figure 8 is the sectional view which a masonry hook is

BE2018 / 5762 of the tip of Figure 5 in shown;

section of another tip according to the tip of Figure 7 in shown.

Referring to Figures 3 to 6, a tip 1 comprises one end 2 conventionally shaped to be clamped in the mandrel of a drill and / or screwdriver. The other end 4 is a cylinder, of height h and of radius r, in which a notch 5 is hollowed out. A connector 3 ensures the connection between the two ends. The ends 1 and 4, as well as the connector 3 are arranged along an axis AA '.

The notch 5 is hollowed out in the cylinder 4 in a semi-transverse manner, that is to say that the notch does not extend over the entire diameter of the cylinder. The radial depth of the notch is slightly greater than the radius r of the cylinder, so as to include the cylinder axis. The notch 5 has an axial wall 51, a radial wall 52 and two parallel walls 53. The walls are generally flat. The axial and radial walls are here linear, that is to say having no particular relief over their length.

In practice, the end piece 1 is firstly fixed to a drill and / screwdriver by clamping its end 2 in the mandrel of the drill / screwdriver. This operation is entirely conventional.

When the bit is installed, the axis AA 'corresponds to the axis of rotation of the screwdriver / drill.

The operator wishing to fix a masonry hook 6, as illustrated in FIG. 2, places the threaded end 62 of the hook 6 against the wall, at the place where it is to be fixed and holds it with one hand . With the other hand, he grabs the screwdriver / drill by his handle, positions it so that the folded end 61 of the hook 6 fits into the notch 5, to the bottom of the notch against the radial wall 52 and so

BE2018 / 5762 that the rod 63 of the hook 6 is in contact with the axial wall

51. Thus, when the operator actuates the screwdriver / drill, the rotational movement is imparted to the nozzle 4, which transmits the movement to the hook 6. The transmission of the movement is in particular ensured by the parallel walls 53 which enclose the folded head 61 of the hook.

It is important that the axis of rotation AA ′ of the end piece corresponds to the axis XX ′ of the hook. To ensure this correspondence, the notch is dimensioned to make the axis of rotation of the screwdriver / drill and the bit correspond with that of the hook rod.

For example, it is standard for a folded hook to have a section of

3.5 mm. The distance between the parallel walls must therefore be 3.5 mm, in order to be able to insert the hook therein without leaving any clearance between the folded head 61 of the hook and the walls during screwing. Ideally, the radial depth of the notch corresponds to the radius r of the cylinder to which the radius of the section of the rod is added, here 1.75 mm.

The height h of the cylinder is greater than the height of the notch. The height of the notch is chosen to be greater than the section of the hook so that the part 61 which is not aligned with the rod of the hook is sufficiently pressed into the notch.

The fitting 3 is not an essential part of the end piece. It can nevertheless facilitate the technical assembly of the end 2 with the cylinder 4, for example brazing, thus serving as an intermediate section between the two ends. It is shown here with a smaller radius than the cylinder 4. This makes it possible to limit the weight of the bit, while maintaining a certain distance between the screwdriver / drill and the hook rod so that the operator retains good visibility. of what he does. The mandrel of the screwdriver / drill is generally quite wide. It is then advantageous to move the end 4 away from the end piece so that it is more visible during the screwing of the hook.

BE2018 / 5762

Referring to Figures 7 and 8, a nozzle 10 is intended for the screwing of masonry hooks 8, not bent, but wavy as illustrated in Figure 1, with a screwing axis YY '. The tip 10 includes an end 20 conventionally shaped to be clamped in the mandrel of a drill and / or screwdriver. The other end 40 is a cylinder in which a notch 50 is hollowed out. A connector 30 provides the connection between the two ends 20 and 40. The ends 20 and 40, as well as the connector 30 are arranged along an axis BB '.

The notch 50 is, as described in the previous example, also hollowed out in the cylinder 40 in a semi-through radial manner, that is to say that the notch does not extend over the entire diameter of the cylinder. The notch 5 has an axial wall 501, a radial wall 502 as well as two parallel walls 503. The axial wall is not here more linear but wavy, that is to say having, along its length, a relief "in waves "corresponding to the undulation of the hook 8.

The hook 8 has its end 81 wavy in a plane, that is to say that the end is curved alternately in two opposite directions, giving the end of the hook a width greater than its thickness.

The hook can thus be inserted between the parallel walls 503, the spacing of which corresponds to the thickness of the end 81 of the hook 8, until the undulation pattern of the hook 8 is in contact with the axial wall. wavy 501.

Thus, during the rotation of the endpiece, the parallel walls 503 enclosing the hook 8 can impart to it the screwing movement along the axis BB ', corresponding to the screwing axis YY' of the hook 8. As in the previous example, the dimensions of the notch are chosen so that the non-linear part 81 of the hook is sufficiently pressed into the notch and so that the axis BB ′ corresponds to the axis of rotation of the screwdriver and to the axis YY 'of the hook rod 8.

This type of hook and generally folded once, BE2018 / 5762 installs to be able to secure the insulation layer and / or the brick notch with the retaining wall.

The means for holding the masonry hook in the end piece could have a completely different shape and / or comprise additional elements. For example, means for closing the notch after installation of the hook may be provided to reduce the risk of displacement of the hook in the notch during screwing or to improve the tensile force imparted by the end piece to the hook.

Fittings 3 or 30 can be colored to be easily identified in a storage box.

If the hooks are made of ferromagnetic metal, provision may be made to magnetize, at least in part, the end piece of the invention.

Claims (6)

Claims 1. End piece (10) adaptable to a screwdriver and / or a drill for the screwing of a masonry hook (8) having a threaded rod (63) along a screwing axis (XX '; YY') and one end ( 81) wavy in a plane, the end piece (1) comprising an axis of rotation (AA '; BB'), one end (2) arranged to be clamped in the chuck of the screwdriver and / or drill, the other end (4; 40) comprising means (5; 50) for holding and driving in rotation the masonry hook (6; 8) shaped to match the axis (BB ') of rotation of the end piece with the screwing axis (YY ') of the masonry hook, the said drive means comprising a semi-transverse radial notch (5) having an axial wall (501), a radial wall (502) and two parallel walls (503), La axial wall (501) having a wavy profile along its length shaped to correspond to the corrugation of the hook (8). 2. End piece (10) according to claim 1, wherein the means (50) for holding the hook (8) masonry are a cylinder (40) in which the notch (50) is shaped so that the end piece gives the hook the rotary movement of the screwdriver / drill when it is activated. 3. A tip according to one of claims 1 and 2, wherein the notch is dimensioned to match the axis of rotation (BB ') of the screwdriver / drill and the tip with that (YY') of the hook rod. 4. End piece according to one of claims 1 to 3, comprising a connector (3) connecting the two ends (2, 4). 5. Method of screwing a hook (8) of masonry having a threaded rod along a screwing axis (YY ') in a wall, using a nozzle (10) according to one of claims 1 to 4, comprising the steps of: BE2018 / 5762 - The end piece (10) is fixed to a drill and / or screwdriver by clamping its end (20) in the mandrel of the drill / screwdriver; - the threaded end of the hook (8) is placed against a wall, where it must be fixed; 5 - the drill and / or screwdriver is positioned so that the non-threaded end (81) of the hook (8) is inserted into the means (50) for holding and driving in rotation the masonry hook of the end piece (10), so as to correspond the axis (BB ') of rotation of the end piece with the screwing axis (YY') of the 10 masonry hook, and - the screwdriver / drill is activated to rotate the hook (8) to push the threaded rod into the wall.