EP3551819A2 - Construction tool, particularly a grid-type plane, and method for producing such a contruction tool - Google Patents

Abstract

The invention relates to a construction tool, particularly a plane for working on plaster surfaces or plaster base surfaces. The aim of the invention is to create a construction tool of this type, particularly a grid-type plane, which is characterised by a high degree of structural strength, is advantageous compared to prior designs in terms of handling, and can also be produced even more economically in terms of manufacturing. According to the invention, this problem is solved by a construction tool, particularly a plane for working on plaster or plaster base surfaces, which comprises a base body designed as a grid structure, having a plurality of working ribs which form as such a working edge region that dips into a working zone, - at least two of said working ribs being designed as longitudinal limbs of a U-shaped profiled element that opens towards the working zone, and on each U-shaped profiled element, a securing tab made from a cutout portion of said U-shaped profiled element being formed which rises, on a rear surface of the U-shaped profiled element facing away from the working zone, above said rear surface.

Description

 Construction tool, in particular lattice Rabot

The invention relates to a construction tool, in particular a Rabot for the treatment of plaster or plaster carrier surfaces.

From US PS 852,991 a Rabot is known which comprises a plate-like base body, in which a plurality of transverse to a longitudinal axis of this body extending working webs are used. These working webs are made of a steel flat material and each form a working edge, which is used for processing, in particular smoothing a plaster surface.

From DE 202 11 728 U1 a Rabot is also known, which has a substantially rectangular-shaped base body, which is formed by numerous, grid-like arranged webs.

From EP 2 099 594 B1 a Gitterrabot is known, the longitudinal webs are made as Abkantprofile and have a U-shaped cross-section. In the back region of these longitudinal webs openings are formed over which the material removed during the use of the tool can fall off.

1

CONFIRMATION COPY The invention has for its object to provide a construction tool of the aforementioned type, in particular a lattice Rabot, which is characterized by a high structural strength, offers advantages in terms of handling technology over the previous designs and also can be produced even more favorable from production engineering point of view.

This object is achieved by a construction tool, in particular Rabot for the treatment of plaster or Putzträgerflächen, with a base body is designed as a lattice structure and several working bars comprises as such form a dipping into a working zone working edge area,

- Wherein at least two of the aforementioned working webs are designed as longitudinal limbs of a working zone towards the open U-profile element, wherein at that U-profile element made of a section of the U-profile element Fixierlasche is formed on one of the working zone ^* opposite back surface of the U -Profilelementes rises above this back surface.

This advantageously makes it possible to create a lattice rabbet in which an advantageous distribution of forces and thus a particularly high structural strength results within the lattice structure and in which a handle provided for grasping and handling the lattice body is connected in a high-strength manner via the fixing lug can.

The U-profile is designed such that it has in the extending between the longitudinal legs back area a plurality of preferably rectangular recesses, from which removed by the working webs of the machined plaster surface material can escape to the rear of the lattice Rabot.

The base body is preferably designed such that it forms a rectangular structure based on typical dimensions of corresponding construction tools. The base body is in this case preferably dimensioned such that its length measured in the longitudinal direction is approximately twice as large as the width measured transversely to the longitudinal direction. The base body may be formed so that it comprises at least two, preferably three longitudinally extending U-profile elements.

The base body according to the invention preferably also comprises a plurality of transversely oriented transverse to the longitudinal webs, and welded to the longitudinal webs transverse webs. Preferably, both the longitudinal webs and the transverse webs are provided in the region of the intersections with notching sections and joined together via these correspondingly designed notching sections, so that the working edges defined by the respective webs extend essentially at a working plane level. The longitudinal and transverse webs are preferably welded together in the region of the notch portions. The corresponding welds are preferably designed as relatively short fillet welds.

The construction tool according to the invention is provided with a handle device which comprises a handle section, which is located on a side remote from the working zone handle side of the base body. This gripping device can be designed in particular as a bow-shaped handle which extends in the longitudinal direction of the base body. The handle portion may in this case be provided in particular with a, made of a flat sheet ironing core, said bracket core attached to the integrally formed with the U-profile fixing straps, in particular screwed or riveted or pinned.

The working edges defined by the base body are preferably provided with an extremely sharp toothing. This toothing can be made by fine blanking, rolling, or in particular cutting. The fins can be locally hardened.

According to a further aspect of the present invention, this also comprises a construction tool, in particular Rabot for the treatment of plaster or render support surfaces, with a base body which is designed as a lattice structure and several working or transverse webs comprises as such a dipping into a working zone

Make working edge area (AK), wherein at least two of the aforementioned working or transverse webs as a longitudinal leg of the working zone towards open U-profile are executed, and these U-profiles are made as formed sheet metal cutting parts, wherein the working edge region (AK) a tooth contour with tooth tips and

Tooth vales, which is brought about by jet cutting, the tooth contour and the cutting guide are tuned such that within a

Starting material plate immerse the tooth tips of a blank in the tooth valleys of the adjacent blank.

The invention thus also encompasses a method for producing a

Building tool of the abovementioned type, in which the teeth of adjacent blanks are cut out from each other in a complementary manner from the starting material to form a gap corresponding to the cutting width.

Brief description of the figures

Further details and features of the invention will become apparent

following description in conjunction with the drawing. It shows:

FIG. 1a shows a perspective view of a lattice rabbit according to the invention,

FIG. 1b is a perspective view of a crossbar designed as a U-profile of a lattice bar according to the invention with a fixing tab for the tool handle which is folded out integrally from the sheet metal blank;

FIG. 1c shows a cross-sectional illustration of the crossbar according to FIG. 1b in the region of the fixing tab;

FIG. 1d is a perspective view of a longitudinal ridge of a lattice rabbet according to the invention designed as a U-profile with a fixing lug for the tool handle which is folded out integrally from the sheet metal blank of the U-profile; Figure 2 is a simplified detail to another

 Explanation of the structure of the base body of a grid rabbets invention, here with a specially designed longitudinal side bar,

Figures 3a, 3b and 3c different configurations of the edges of

 Working lands

FIG. 4 is a simplified illustration for illustrating the

 Structure of a base body with two U-shaped longitudinal profiles and several transversely extending U-profile transverse webs,

Figure 5 also a simplified schematic representation of

 Illustration of the structure of a base body, which is completely fringed by corresponding longitudinal and transverse webs in the region of its outer peripheral edges,

FIG. 6 is a schematic illustration for illustrating the

 Structure of the grid rabbets according to the invention in the region of a crossing point of a longitudinal web with a transverse web;

Figure 7 is a perspective view of another variant of a grid rabbets according to the invention with an employed end edge crosspiece;

8 shows a sketch for illustrating a cutting course in a sheet metal material intended for the production of the U-profiles, wherein this cutting course makes it possible to manufacture two rows of teeth under a reduced proportion of scrap as well as cut length-saving with one cut. The construction tool illustrated in FIG. 1 is used to machine plaster or plaster support surfaces and comprises a base body 1, which is designed as a lattice structure and comprises a plurality of working webs 2, 3, 4... 7, which as such form a working edge region AK which dips into a working zone ,

The construction tool shown here is characterized in that at least two of the aforementioned working webs 2... 7 are designed as longitudinal limbs of a U-profile element open towards the working zone AK. This results in a particularly robust design of the construction tool, since all the longitudinal limbs are coupled via the back region of the corresponding profile element with a further longitudinal limb and, as a result, a particularly high internal stiffening and structural strength of the base body is achieved. Furthermore, according to the invention at that U-profile element U2 a made of a section of the U-profile element Fixierlasche F1, F2 is formed, which rises on one of the working zone remote back surface of the U-profile element U2 on this back surface.

Each U-profile element is preferably designed so that this comprises a running between the longitudinal legs back region R, wherein in this back region R recesses, for example in the form of Rechteckaustanzungen are formed. The fastening tabs F1, F2 provided here for fastening the handle 8 are formed from a sheet metal material section which is erected from a region of the profile element provided for releasing a recess.

The base body 1 is preferably designed so that it appears in a known manner in a plan view of the working area AK as a rectangular structure.

The base body 1 is here dimensioned such that its length L measured in the longitudinal direction is approximately twice as large as its width B measured transversely to the longitudinal direction. In the embodiment shown here, the base body 1 comprises a total of three extending in the longitudinal direction of the same U-profile elements U1, U2, U3 and a plurality (here five), also formed by U-profile elements transverse webs Q1, Q2, Q3, Q4 and Q5.

The longitudinal profile elements U1, U2 and U3 are joined together with the transverse profile elements Q1, Q2, Q3 via notch sections, so that the working edges AK defined by these webs extend at one and the same working plane level.

The grid Rabot according to the invention is provided with a handle device 8, the section 8 a comprises a handle, which is located on a side remote from the working area AK handle side of the base body. The gripping device 8 is designed as a bow-shaped handle which extends in the longitudinal direction L of the base body. The handle section comprises a yoke core, which is made here of a steel sheet and is welded via Abkröpfungsabschnitte directly to the back of the central longitudinal profile U2.

As can be seen from the illustration according to FIG. 1 b, it is possible to form the fixing tabs F1, F2 integrally with a transverse web Q1,... Q5. The Fixierlasche is here designed as a rectangular structure, wherein the upper transverse edge F1 K acts as a support surface on which an inner surface of a receiving groove of a handle 8 is intimately present and thus prevents lateral tilting of the handle 8. In the embodiment shown here, the outer contour of the fixing tab F1, F2 arises directly as a result of the cutting guide made to expose the recess 01. However, it is also possible to make the fixing tab F1, F2 deviating with a frame lying within this maximum contour pattern. The fixing tab F1, F2 can also be reinforced by welding on an additional layer, or by unfolding another tab (in particular possible in the variant according to FIG. 1d).

As can be seen from the illustration according to FIG. 1c, it is possible to form the fixing tab F1, F2 in such a way that it represents a planar extension of a working web, in particular a transverse web Q2. As can be seen from the illustration according to FIG. 1 d, it is possible to also form the fixing tabs F1, F2 integrally with a longitudinal web U2. The Fixierlasche F1, F2 is also designed here as a rectangular structure, wherein the upper transverse edge F1 K again acts as a support surface on which an inner surface of a receiving groove of a handle 8 is intimately applied and thus prevents lateral tilting of the handle 8.

As can be seen from FIG. 2, it is possible to make the longitudinal limb 7, which forms a longitudinal side edge of the lattice ridge, so that a wall corner region can be worked out particularly effectively with this longitudinal limb 7.

As is further apparent from FIG. 2, both the longitudinal and the transverse webs 6, 9 are provided with notches 10 and are joined together in the region of these notches. The longitudinal and transverse webs are welded together in the region of these notches by the indicated here fillet welds.

In FIG. 3 a, the design of the working zone AK of a longitudinal limb is illustrated in a greatly simplified manner as a straight edge.

In Figure 3b, the design of the working area AK is shown as a sawtooth jagged working edge.

In Figure 3c, the design of the working edge area AK is illustrated as trapezoidal tooth working edge.

As can be seen from the illustration according to FIG. 4, it is possible to form a grid body from the U-profile elements used according to the invention to form the working legs, which has at least two U-profile elements aligned in the longitudinal direction and a plurality of transverse profile elements extending transversely thereto.

In FIG. 5, a variant of a lattice rabbet according to the invention is also shown in greatly simplified form, in which a substantially continuous one Longitudinal side edge 7, 2 is achieved by the corresponding longitudinal profile elements and front and rear cross-profile elements have moved out to the edge region of the base body 1.

In the grid rabot designed in this way, it is possible to form a pair of longitudinal webs in the inner area, which is not manufactured by a U-profile element, but is made only by inserted flat material webs.

In FIG. 6, a joining region is again shown in greatly simplified form, as it is realized, for example, between the longitudinal web 4 and the crosspiece Q1.

The lattice body of the rabbit according to the invention is preferably made of a high-strength steel material, in particular a corrosion-resistant steel material. The design of the working edges of the lattice rabbits, in particular the there formed preferably toothing is preferably adapted to the specific application. The lattice rabot according to the invention makes it possible to smooth out partially or completely cured plaster surfaces or render support surfaces or even to roughen them with a grain size defined by the toothing of the working webs.

The grid Rabot according to the invention is suitable with appropriate design of the working edges in particular for roughening plastic surfaces, in particular of insulating, to improve the adhesion of decorative plaster layers.

The profiles can be welded together from below, and / or from the back, the welds can be designed as short fillet welds, the joint areas of the profiles can be dimensioned so that the joining of the components takes place with a certain pressure and thus before the components the welding process are largely held in the correct position.

It is possible to make the working edges of the lattice Rabts so that even in drywall area smoothing or shaving off Verspachtelungsstellen is possible. In Figure 7 is shown in the form of a perspective view of another variant of a grid rabbets according to the invention with an employee Stirnkanten- transverse web STL. For this lattice Rabot the previous statements apply mutatis mutandis.

The front edge portion STL forms an integral part of the front, as Abkant- or Biegeumformprofil made cross-member Q5 ^' . The angle of attack W is preferably in the range of 60 to 75 °. The front working edge AK5 extends within the working main plane defined by the other working edges E. About the end edge portion STL, it is possible to work out advantageous with the inventive tool Inneneckbereiche, as over the front edge portion STL can be penetrated into the innermost corner.

The main body comprises two longitudinal webs U1, U2 designed as folding profiles and one side end web U3 ^' . The side gutter is designed as a flat profile and forms a substantially flat longitudinal side surface.

The longitudinal webs U1, U2, the Seitenabschlusssteg U3 ^' and the transverse webs Q1, Q2 ... Q5 ^' are joined together via joining sections and notches and welded together. The main body is preferably aligned after assembly of the items and ground in the working edges.

The lattice body of the rabbit according to the invention is preferably made of a high-strength steel material, in particular a corrosion-resistant steel material. The design of the working edges of the lattice rabbits, in particular the there formed preferably toothing is preferably adapted to the specific application. The lattice rabot according to the invention makes it possible to smooth out partially or completely cured plaster surfaces or render support surfaces or even to roughen them with a grain size defined by the toothing of the working webs.

The grid Rabot invention is suitable with appropriate design of the working edges in particular for roughening plastic surfaces, in particular of insulating panels, for improving the adhesion of adhesive layers and decorative plaster layers. It is possible to make the working edges of the lattice Rabts so that even in drywall area smoothing or shaving off Verspachtelungsstellen is possible.

The construction tool shown here is again characterized in that at least two of the aforementioned working webs are designed as longitudinal limbs of a U-profile element open toward the working zone. This results in a particularly robust design of the construction tool, since all the longitudinal limbs are coupled via the back region of the corresponding profile element with a further longitudinal limb and, as a result, a particularly high internal stiffening and structural strength of the base body is achieved. Furthermore, according to the invention at the transverse webs Q1, Q5 a from a section of the respective crosspiece forming U-profile element made Fixierlasche F1, F2 formed, which rises on a working zone remote from the back surface of the U-profile element Q1, Q5 on the back surface.

Each U-profile element is preferably designed so that this comprises a running between the longitudinal legs back region R, wherein in this back region R recesses, for example in the form of Rechteckaustanzungen are formed. The fastening tabs F1, F2 provided here for fastening the handle 8 are formed from a sheet metal material section which is erected from a region of the profile element provided for releasing a recess.

As can be seen from the illustration of Figure 8, it is possible according to a particular aspect of the present invention, to separate the intended for the production of U-profiles sheet metal parts as cutting parts of a sheet material, in which case the toothing is realized under a special cutting profile causes causes a section two usable, and also structurally advantageous rows of teeth ZR1, ZR2 arise. According to the invention, a cutting head follows a "zig-zag path" which is tuned such that alternately rounded tooth tips and pointed tooth tips result For this purpose, it is also possible to perform the cutting head as a laser cutting head, or otherwise cutting head. In principle, the cutting guide according to the invention can also be realized with a wire eroding device.

With the approach described above, the material strips M1, M2 provided for the production of the U-profiles can be cut to form their toothing from a sheet metal material with the least amount of waste. The material strips produced in this way can subsequently be erected by plastic deformation ("folding") into the U-profiles according to the invention.

Claims

claims 1. construction tool, in particular Rabot for processing plaster or Plaster carrier surfaces, with:  a base body (1) which is designed as a lattice structure and comprises several working or transverse webs (2,... 7) which, as such, form a working edge area (AK) which dips into a working zone, in which  - At least two of the aforementioned working or transverse webs (2, ... 7) are designed as a longitudinal leg of a working zone towards the open U-profile, and - At that U-profile element made of a section of the U-profile element Fixierlasche (F1, F2) is formed, which is on a remote from the working zone back region (R) of the U-profile element above this back region (R) rises 2. Building tool according to claim 1, characterized in that the U-profile extending between the longitudinal limbs back region (R), and in that back region (R) recesses are formed and that those fixing tab (F1, F2) from a recess releasing material section is made. 3. Building tool according to claim 1 or 2, characterized in that the base body (1) in a plan view of the working zone (AK) appears as a rectangular structure. 4. Construction tool according to claim 3, characterized in that the base body (1) is dimensioned such that its measured length in the longitudinal direction (L) is approximately twice as large as its transversely to the longitudinal direction measured width (B). 5. Building tool according to at least one of claims 1 to 4, characterized in that the base body (1) comprises two longitudinally extending U-profile elements (U1, U3). 6. Building tool according to at least one of claims 1 to 5, characterized in that the base body in its longitudinal direction extending longitudinal webs and transversely thereto extending transverse webs (Q1, ... Q5). 7. Building tool according to at least one of claims 1 to 6, characterized in that the longitudinal webs and the transverse webs are joined together via notching sections, so that extend through this defined working edges at a working level level. 8. The construction tool according to at least one of claims 1 to 7, characterized in that a gripping device (8) is provided which comprises a handle portion which is located on a working zone facing away from the handle side of the base body (1) and that the gripping device is designed as a bow handle which extends in the longitudinal direction of the base body, and in that this bow-shaped handle is fastened to the fixing tongue (F1, F2), and that the grip portion comprises a bow-type core, and in that this bow-type core is fastened to the fixing tongue formed integrally with the base body, in particular screwed thereto; riveted or pinned with this. 9. construction tool, in particular Rabot for processing plaster or Plaster carrier surfaces, with:  a base body (1) which is designed as a lattice structure and comprises several working or transverse webs (2,... 7) which, as such, form a working edge area (AK) which dips into a working zone, in which  - At least two of the aforementioned working or transverse webs (2, ... 7) are designed as a longitudinal leg of a working zone towards the open U-profile, and - These U-profiles are made as formed sheet metal cutting parts, -in which - The working edge area (AK) has a tooth contour with tooth tips and tooth valleys, which is brought about by jet cutting, the tooth contour and the cutting guide are tuned such that within a starting material plate dip the tips of one blank into the tooth valleys of the adjacent blank. 10. A method for producing a construction tool according to claim 9, characterized in that the teeth of adjacent blanks are cut out from each other to form a cut width of the corresponding gap complementary to each other from the starting material.