EP1847664A1 - System von Werkzeugen zur Oberflächenbearbeitung für Flügelglätter - Google Patents

System von Werkzeugen zur Oberflächenbearbeitung für Flügelglätter Download PDF

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Publication number
EP1847664A1
EP1847664A1 EP07364004A EP07364004A EP1847664A1 EP 1847664 A1 EP1847664 A1 EP 1847664A1 EP 07364004 A EP07364004 A EP 07364004A EP 07364004 A EP07364004 A EP 07364004A EP 1847664 A1 EP1847664 A1 EP 1847664A1
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EP
European Patent Office
Prior art keywords
trowel
arm
rigid arm
assembly according
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07364004A
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English (en)
French (fr)
Inventor
René Duval
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duval Jacqueline Marie Pierrette
Original Assignee
Duval Jacqueline Marie Pierrette
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duval Jacqueline Marie Pierrette filed Critical Duval Jacqueline Marie Pierrette
Publication of EP1847664A1 publication Critical patent/EP1847664A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/20—Implements for finishing work on buildings for laying flooring
    • E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
    • E04F21/245—Rotary power trowels, i.e. helicopter trowels

Definitions

  • the present invention relates to a set of surfacing tools for trowel.
  • a mechanical trowel is a machine used to smooth and smooth a surface, for example a concrete floor, to ensure flatness.
  • the operation is done several hours after pouring the fluid concrete, when it began to make its decision.
  • the invention is more specifically directed to a machine comprising at least one rotary rotor of vertical axis, integral with a set of blade-shaped tools, generally three or four in number, which extend radially to the manner of the blades of a helicopter, "star” or “cross” with respect to the axis of the rotor and which are adapted to flatten the ground.
  • Such machines may comprise a single rotor (see for example the document EP 1 435 420 ), two rotors arranged side by side (see for example the FR 2 370 823 and the EP 0 223 859 ), or three rotors arranged in a triangle.
  • finishing tool called “smoother”
  • roughing tool called “trowel”.
  • the trowel is adapted to be secured temporarily to the trowel, the upper face of the trowel having for this purpose a flat receptacle, open on one side, and thus conformed that the smoother can be partially inserted and immobilized, so that the The constituent blade of the smoothing blade is superimposed on that of the trowel.
  • the machine is used with the floats mounted on the smoothers.
  • the trowel is a plate made of polished steel sheet, the corners are slightly raised; its length, which corresponds to the radial direction of the rotor, is significantly larger than its width.
  • a square-section spun steel stiffening bar is permanently fixed (by riveting or welding) against the upper face of this plate, along its long axis of symmetry.
  • the rotor carries a number of radial arms for mounting these plates.
  • Each radial arm has an approximately cylindrical end portion adapted to be fitted and radially fixed in said rotor.
  • the remaining part of the arm generally has a hexagonal section, the length of which corresponds to about half the length of the trowel. It has vertical holes that can be brought into coincidence with tapped holes provided in the aforementioned bar, which allows to fix the smoother under the arm by means of screws.
  • the bar is slightly shorter than the length of the wiper blade. Its width is equal to the side of the hexagon corresponding to the cross section of the arm.
  • the bar is a spacer which allows to lower the blade of the smoother relative to the hub of the rotor, and prevent it from coming untimely support against the ground during operation.
  • This bare part (not covered by the arm) has the function of retaining the trowel when it is placed on the trowel.
  • the upper face of the trowel has a flat receptacle, open on one side (like a pocket) and thus shaped that the smoother can be partially inserted and immobilized, so that the blade constituting the smoothing blade is superimposed on that of the trowel, and the trowel is provided with a flexible tab adapted to cap said bar and retaining by snap elastic (clipping).
  • the bare part of the bar also has tapped holes allowing it to be fastened under the arm after it has been turned 180 ° in its own plane (its external edge becoming internal, and vice versa).
  • the blade of the trowel tends to wear more intensely on one side than the other, depending on the direction of rotation of the rotor; this inversion distributes the wear and increases the service life of the trowel.
  • the cost of manufacture of the trowel is relatively high, because it requires, in addition to cutting and stamping the plate, the machining of the bar (including the realization of threaded holes for attachment to the arm) and fixing the bar to the plate (by riveting or welding), which requires a significant labor time.
  • the plate component of the smoothing is improperly stiffened, because the portion of the bar which extends cantilevered outside the support arm tends to bend as a result of the significant pressure forces experienced by the tools at during work, which affects the quality of the result.
  • the blocking of the trowel on the trowel is unreliable; it may be unclipped, especially in case of shock, which causes a risk of escape of the trowel at high speed, due to centrifugal force, causing damage or even bodily injury.
  • the document EP-1 382 775 relates to a mechanical trowel blade blade comprising a spacer bar interposed between a blade pad and the blade arm; the plate and the spacer bar are independent and fixed together to the blade arm by means of bolts.
  • the arm and blade extend substantially the entire length of the wafer, giving the latter the necessary rigidity.
  • the EP-1 382 775 which probably concerns the mounting of a versatile type tool, does not provide the possibility of mounting a trowel on the wafer.
  • the invention aims to overcome these problems.
  • a set of blade-shaped surfacing tools for a mechanical trowel which comprises at least one rotary rotor of vertical axis, integral with several sets of tools which extend radially with respect to the axis of the blade.
  • rotor and which are adapted to flatten a floor, especially concrete, said assembly comprising at least two different tools, namely a finishing tool, called “smoothing”, and a roughing tool, called “trowel”, suitable for being secured to the trowel, the upper face of the trowel having a flat receptacle, open on one side, and thus shaped that the smoother can be partially inserted and immobilized, so that the blade constituting the smoothing blade is superimposed on that the trowel, said assembly also comprising a rigid arm having an end portion adapted to be fitted and radially fixed in the hub of said rotor, said trowel being a plate adapted to be fix e removably with screws or bolts under the said rigid arm.
  • the trowel, referenced 29, is fixed under the straightener, referenced 18, by resilient snapping, by means of a mounting member consisting of a clip, referenced 37.
  • Such a device has a serious risk of inadvertent disconnection and escape of the trowel, in use, because of accidents, because their mutual fixation is not positively assured.
  • An object of the invention is precisely to avoid such a risk.
  • the rigid arm is secured to a mounting member adapted to be positively attached, using at least one screw, to the upper wall of said receptacle.
  • the rigid arm is composed of two superimposed elements, namely a solid bar 1, for example steel, which includes the end portion 11, and a flat rod 2, for example extruded aluminum, interposed between the bar 1 and the smoother 4.
  • the end portion 11 has a cylindrical shape of given diameter, and a standardized configuration, comprising a helical groove 111 and a transverse groove 110, which allows its mounting, in a radial orientation, in the rotor hub of a machine of the trade, hub which bears the reference 7 in Figures 2, 4 and 5.
  • the remainder 12 of the bar 1 has a length substantially greater than that of the portion 11, and a square section, whose side is slightly greater than the diameter of the portion 11.
  • the portions 11 and 12 may be made by machining, from a single piece or be manufactured independently of one another and then fixed to one another coaxially, for example by force fitting the portion 11 in an axial bore pierced in the portion 12.
  • the portion 12 is crossed by several vertical bores, or chimneys, 10. In the example shown there are four in number, arranged along the longitudinal axis of symmetry of the bar, and regularly spaced.
  • an angle plate 13 On the upper face of the portion 12 is fixed, for example by means of screws (not shown) an angle plate 13; it has a vertical and transverse wing, raised upwards, pierced by a longitudinal orifice 130.
  • this plate serves to secure the arm 1, for example by means of a screw passing through the orifice 130, to a ring 9 which connects all the arms (four in this case) of the machine, which stabilizes the tool set during operation, according to an arrangement known per se.
  • the flat shank 2 has the same length as the portion 12; it has a rectangular section, whose small side is arranged vertically and the long side, equal to that of the part 12, horizontally. It is traversed by four vertical holes 20 having a disposition and a diameter identical to those of the chimneys 10.
  • the lower face of the rod 2 has a transverse counterbore 22 of rectangular cross section; this zone is pierced by a vertical and central hole 21 opening into the counterbore.
  • a central position of the countersink is not obligatory, of course.
  • the respective dimensions of the bar portion 12 and the flat rod 2 are such that the latter can be positioned exactly under the part 12, the side and front edges of these two elements being then in the same plane, and the axis of each of the chimneys 10 being aligned with that of a hole 20.
  • the axis of the orifice 21 is then aligned with the vertical axis of a threaded blind hole drilled in the lower face of the part, not visible in Figure 1, and referenced 120 in Figures 7 and 8 .
  • the mounting member 3 is a rigid rectangular tongue, for example steel, whose width and thickness respectively correspond to the width and depth of the counterbore 22; its length is equal, for example, to twice the width of the flat rod 2.
  • Hole 30 is cylindrical and threaded.
  • the hole 31 is frustoconical and smooth, complementary to a milled screw head, referenced 32 in Figures 7 and 8, for fixing the tongue 3 under the arm 1-2.
  • the tongue 3, recessed in the counterbore 22, can be positioned in two different ways, offset by 180 °, so that its protruding portion projects on one or the other of the two edges. In each of these positions, the hole 31 is opposite the hole 21. Thanks to this arrangement, it is possible to adapt the mounting of the trowel to the direction of rotation of the rotor.
  • the smoother 4 is a plate of thin sheet (indicative, between 1 and 2 mm), rigorously flat, preferably hardened and polished steel, rectangular in shape, whose large direction extends radially (relative to the axis of the rotor). The length of this plate is a little larger than that of the 12-2 assembly.
  • These holes have a frustoconical shape, complementary heads 81 countersunk screws 80 for securing the trowel under the arm 1-2 with wing nuts 8 (see Figure 6).
  • the trowel 5 comprises a plate made of sheet steel 50, of the same length as the trowel 4, but of substantially larger width. Its thickness is a little higher than that of the smoother (as an indication, between 2 and 3 mm). It has bevelled wedges, as well as slightly raised edges, as is known per se.
  • a sheet metal plate folded by stamping, and thus shaped that it forms a flattened pocket 6 in which it is possible to insert and immobilize a lateral portion of the smoother.
  • this folding is such that the sheet has a horizontal lateral edge 62 by which it is welded to the trowel plate 50, an intermediate vertical recess 61, and a horizontal main part 60 spaced apart. of the plate 50 of a spacing sufficient to accommodate the smoothing machine 4 and the tongue 3.
  • the portion 60 is folded down at right angles, forming vertical transverse cheeks 65.
  • the portion 61 is indented and has open spaces 64, which promotes the proper positioning of the smoothing machine 4 in the receptacle 6, despite its raised corners 42.
  • the upper horizontal wall portion 60 In its central zone, in the vicinity of its free edge 600, the upper horizontal wall portion 60 has a small oblong opening or light, 63, arranged transversely, whose major axis corresponds to the minor axis of symmetry of the trowel 5.
  • a kit comprising a set of arms 1-2. , tongues 3, smoothers 4 and floats 5, the number of elements of this set being for example four, since the rotor has four blades.
  • trimmers and trowel which are the only wear parts and which, considering their structure are of a relatively low cost price.
  • the tongue 3 is embedded in the countersink 22 of the rod 2 so that its protruding portion projects from the right side, which depends on the direction of rotation of the rotor.
  • a screw 32 is inserted through the superimposed holes 31 and 21, and after correctly positioning the rod 2 against the part 12 of the bar 1, it is screwed into the threaded hole 120.
  • the countersunk head of this screw is housed without exceeding in the conical hole 31 (see Figure 7).
  • the portion 11 of the bar 1 is then fitted into the hub 7 and fixed thereon by means of conventional and standardized mounting members (not shown) fitted to the rotor of the machine.
  • This ring is optional.
  • the solid arm 1-2 which runs over almost the entire length of the trowel stiffens the stripper plate optimally, without risk of deformation of the latter.
  • this arm remains of acceptable weight, given that the inserted insert rod, which also serves as spacer element (lowering the tool) is lightweight material, for example aluminum.
  • the wall 60 is thus dimensioned and positioned at the end of nesting a lateral flank of the arm 1-2 abuts against the free edge 600 of this wall (see Figures 5 and 8), and that the trowel 5 is is then perfectly centered in relation to the arm, the hole tapped 30 of the tongue 3 being in turn above the hole 63.
  • the fact that it has the shape of a light makes it possible to compensate for dimensional irregularities or possible deformations.
  • the trowel is positively secured to the trowel by means of the screw 8 'whose rod passes through the aperture 63 and is screwed into the hole 30.
  • the screwing operation can be done easily, without tools.
  • the positive fixing, by bolting, of the trowel with the trowel eliminates the risk of accidental and dangerous escape of the trowel, that one meets with the conventional locking systems, with elastic tab of clipping.
  • This attachment could be achieved by means of more than one screw or bolt, and / or associated with an additional or complementary fastening means.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP07364004A 2006-04-10 2007-03-30 System von Werkzeugen zur Oberflächenbearbeitung für Flügelglätter Withdrawn EP1847664A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0603138A FR2899616A1 (fr) 2006-04-10 2006-04-10 Systeme de montage d'outils de surfacage pour truelle mecanique

Publications (1)

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EP1847664A1 true EP1847664A1 (de) 2007-10-24

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EP07364004A Withdrawn EP1847664A1 (de) 2006-04-10 2007-03-30 System von Werkzeugen zur Oberflächenbearbeitung für Flügelglätter

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FR (1) FR2899616A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101839069A (zh) * 2010-05-18 2010-09-22 沈阳飞机工业（集团）有限公司 复合材料板梁构件纵梁平面度补偿方法
CN113325698A (zh) * 2021-06-15 2021-08-31 广东博智林机器人有限公司 抹光机控制方法、装置、计算机设备和存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556983A (en) * 1949-05-05 1951-06-12 Walter J Root Cement finishing float blade
US2662454A (en) * 1948-04-12 1953-12-15 Whiteman Marvin Edwin Float trowel for cement floor finishers
US2888863A (en) * 1955-09-09 1959-06-02 George G Eisenbeis Powered rotary trowels
FR2352932A1 (fr) * 1976-02-16 1977-12-23 Mecanique Generale Accessoire pour machines talocheuses lisseuses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662454A (en) * 1948-04-12 1953-12-15 Whiteman Marvin Edwin Float trowel for cement floor finishers
US2556983A (en) * 1949-05-05 1951-06-12 Walter J Root Cement finishing float blade
US2888863A (en) * 1955-09-09 1959-06-02 George G Eisenbeis Powered rotary trowels
FR2352932A1 (fr) * 1976-02-16 1977-12-23 Mecanique Generale Accessoire pour machines talocheuses lisseuses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101839069A (zh) * 2010-05-18 2010-09-22 沈阳飞机工业（集团）有限公司 复合材料板梁构件纵梁平面度补偿方法
CN101839069B (zh) * 2010-05-18 2011-08-31 沈阳飞机工业（集团）有限公司 复合材料板梁构件纵梁平面度补偿方法
CN113325698A (zh) * 2021-06-15 2021-08-31 广东博智林机器人有限公司 抹光机控制方法、装置、计算机设备和存储介质
CN113325698B (zh) * 2021-06-15 2024-05-31 广东博智林机器人有限公司 抹光机控制方法、装置、计算机设备和存储介质

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