EP0288531B1 - Truelle d'application et de faconnage de materiaux de construction - Google Patents

Truelle d'application et de faconnage de materiaux de construction Download PDF

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Publication number
EP0288531B1
EP0288531B1 EP87907323A EP87907323A EP0288531B1 EP 0288531 B1 EP0288531 B1 EP 0288531B1 EP 87907323 A EP87907323 A EP 87907323A EP 87907323 A EP87907323 A EP 87907323A EP 0288531 B1 EP0288531 B1 EP 0288531B1
Authority
EP
European Patent Office
Prior art keywords
trowel
handle
blade
tang
welding
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.)
Expired - Lifetime
Application number
EP87907323A
Other languages
German (de)
English (en)
Other versions
EP0288531A1 (fr
Inventor
Thomas H. Schneegans
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.)
WFS Handels AG
Original Assignee
WFS Handels AG
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
Priority claimed from CH4472/86A external-priority patent/CH671796A5/de
Priority claimed from CH5004/86A external-priority patent/CH672280A5/de
Application filed by WFS Handels AG filed Critical WFS Handels AG
Priority to AT87907323T priority Critical patent/ATE75515T1/de
Publication of EP0288531A1 publication Critical patent/EP0288531A1/fr
Application granted granted Critical
Publication of EP0288531B1 publication Critical patent/EP0288531B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/20—Tools or apparatus for applying mortar
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/20—Tools or apparatus for applying mortar
    • E04G21/201—Trowels

Definitions

  • the invention relates to a trowel according to the preamble of claim 1 (see the document FR-A-2 281 195) and a device for its production.
  • trowels were originally drop-forged, whereby the hinge sits on the trowel blade with a foot that tapers conically in the direction of the top of the basin and is formed in one piece with it.
  • the trowel blade itself is often tapered in thickness, which gives such trowels excellent elasticity, which still makes them indispensable for many experts today.
  • the price of such trowels is understandably very high.
  • Trowels have therefore been produced for a long time, in which one very efficiently in large quantities, e.g. is attached to the cut sheet by pressing, or a rod made of round material by bending.
  • the fishing foot is attached to the trowel blade by welding the two unhardened parts, then sanding, hardening and sanding again, in other words by a very expensive process.
  • all of the welding processes previously used for the production of trowels also develop excessive heat for a long period of time, which in turn causes the trowel blade to warp.
  • the object of the invention is therefore to create a trowel of the type mentioned at the outset which is inexpensive to produce, offers better strength between the rod and the trowel blade, leaves the underside of the trowel blade untouched and improves the elasticity of the trowel blade.
  • Some of the objects of the invention can also be achieved if the - preferably full-surface - connection of a blunt fishing end to the top of the trowel blade by brazing or gluing (but is relatively expensive and usually results in insufficient strength), or by spot or projection welding ( but strikes the underside and gives only a limited strength). As mentioned, the stud welding method is therefore preferred.
  • the stud welding process is complicated to carry out under certain conditions, yet high strength values are achieved.
  • the trowel according to the invention also improves the elasticity of the trowel blade compared to current trowels and almost approaches that of a drop-forged trowel, the elasticity of which is simulated by dispensing with the fishing foot.
  • the inventor also found what had not previously been observed that only the foremost tip of hump-welded fishing feet is decisive for achieving the required separation strength; therefore, only this tip tears in a separation test; the rear of the fishing foot practically does not contribute to the separation strength.
  • FIG. 1A to D and FIG. 2 each show a conventional trowel blade 1, each with a fishing foot 2 and projection welds 3, or weld seams 3 '.
  • the length L is available from the front end of the fishing foot 2 to the top of the basin.
  • FIG. 3 and 4 show two different fishing bolts 4 according to the invention in an angled form.
  • the fishing pin 4A according to Figure 3 has, as usual, a disk-shaped widening 7 and the ignition tip 7 'for performing the tip-stud welding process. Under special conditions, the drawn arc stud welding process can also be used without an ignition tip. According to FIG. 4, an S-shaped fishing pin 4D can also be butted onto the trowel blade.
  • Fig. 5 shows a short, straight fishing pin 4E. It has at its upper end a cylindrical, concentric recess 10 into which an upper, angled fishing part 4F with its tapered lower end 10 'is inserted, which in turn carries a braze 11 for connecting the two fishing parts 4E, F to one another.
  • An adhesive connection would also be possible under certain circumstances.
  • Fig.6 shows that the invention can also be applied to convex or concave angled trowel blades 1 'or 1 ⁇ , as are required for working on wall corners in buildings.
  • the respective fishing pin 4 'or 4 ⁇ a correspondingly modified, ie angled, disc-shaped widening 17 'and 17 ⁇ ; like all other fishing bolts according to the invention, it can be provided with a thread and / or an extension tube (not shown here).
  • FIG. 7 shows a device which is particularly expedient for the production of a trowel according to the invention by the stud welding method.
  • an electrode half 5 ' is shown, which has a recess 5 ⁇ suitable for receiving the fishing bolt 4A and a power supply 6.
  • FIG. 8 two foldable half-shells 12 are shown, which enclose the lower end of the fishing bolt and hermetically seal it outwards while the stud is being welded. They prevent the trowel blade from being defaced in the immediate vicinity of the welding point by any welding slag or combustion residues formed during the welding process and are actuated by pneumatics 13.
  • the two half-shells 12 are closed around the foot of the fishing bolt 4B. This is inserted into a stud holder 14, which extends down to 1 mm beyond the welding point.
  • the power supply (inductive) takes place via an axial threaded rod 6 ', which also exerts the pressure on the fishing bolt 4B and thus on the trowel blade (not shown) during the welding process.
  • an internal thread 19 is provided at the free end 18 of an angled hinge 4G, in which a screw 21 engages axially through the handle 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)

Abstract

Une truelle d'application et de façonnage de matériaux de construction comprend une lame, un manche fixé à l'extrémité postérieure de la lame et une poignée fixée à l'extrémité libre du manche. Le manche (4) est fixé bout à bout à la lame (1), de préférence soudé par friction ou à l'arc par percussion. L'écart (L1) entre le manche (4) et le bord de la lame (1) doit être inférieur au diamètre du manche (4), de préférence inférieur à la moitié de ce diamètre. Le manche peut comprendre un filetage; une rallonge tubulaire (8) peut être emboutie ou vissée sur le manche, reliée le cas échéant au goujon du manche (4) par soudage par points. Le manche peut également comprendre à son extrémité libre un filetage intérieur (9) dans lequel est vissée une vis (21) qui traverse axialement la poignée (20).

Claims (6)

1. Truelle pour déposer et façonner des matériaux de construction, comprenant une spatule (1) et une soie (4) fixée à l'extrémité postérieure de ladite spatule, et à l'extrémitè libre de laquelle une poignée (20) est fixée, caractérisée par le fait que la soie (4) est coudée et est soudée à l'arc bord à bord sur la spatule (1) de la truelle, avec percussion.
2. Truelle selon la revendication 1, caractérisée par le fait qu'un filetage interne(19) est prévu à l'extrémité libre de la soie (4G), filetage dans lequel pénètre une vis (21) parcourant la poignée (20) dans le sens axial.
3. Truelle selon l'une des revendications précédentes, caractérisée par le fait que la distance (L) comprise entre la soie (4) et le bord de la spatule (1) de la truelle est inférieure au diamètre de ladite soie (4), de préfèrence inférieure à la moitié de ce diamètre.
4. Truelle selon l'une des revendications précédentes, caractérisée par le fait que la spatule (1′, 1˝) de ladite truelle est coudée dans la zone de soudage.
5. Dispositif de fabrication d'une truelle selon l'une des revendications précédentes, par soudage à l'arc avec percussion, caractérisè par le fait que deux demi-électrodes (5′) présentent, à l'état fermé, un évidement (5˝) de configuration coudée, correspondant à la configuration de la soie (4), ainsi qu'une alimentation en courant (6).
6. Dispositif de fabrication d'une truelle selon l'une des revendications 1 à 4, par soudage à l'arc avec percussion, caractérisé par le fait que deux coquilles de recouvrement (12), de section transversale semi-circulaire, sont prévues pour recouvrir la base de la soie (4A, D) au cours du processus de soudage à l'arc avec percussion, et sont de préférence actionnables pneumatiquement (13).
EP87907323A 1986-11-10 1987-11-07 Truelle d'application et de faconnage de materiaux de construction Expired - Lifetime EP0288531B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87907323T ATE75515T1 (de) 1986-11-10 1987-11-07 Kelle fuer das auftragen und verarbeiten von baumaterialien.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH4472/86A CH671796A5 (en) 1986-11-10 1986-11-10 Trowel for mortar and plaster
CH4472/86 1986-11-10
CH5004/86A CH672280A5 (en) 1986-12-16 1986-12-16 Trowel for mortar and plaster
CH5004/86 1986-12-16

Publications (2)

Publication Number Publication Date
EP0288531A1 EP0288531A1 (fr) 1988-11-02
EP0288531B1 true EP0288531B1 (fr) 1992-04-29

Family

ID=25695556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907323A Expired - Lifetime EP0288531B1 (fr) 1986-11-10 1987-11-07 Truelle d'application et de faconnage de materiaux de construction

Country Status (3)

Country Link
EP (1) EP0288531B1 (fr)
DE (1) DE8705825U1 (fr)
WO (1) WO1988003589A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522111A (en) * 1993-03-02 1996-06-04 Marshalltown Trowel Company Finishing trowel handle
GB2324493B (en) * 1994-12-08 1999-04-14 Marshalltown Trowel Co Finishing trowel handle
GB2386148A (en) * 2002-03-06 2003-09-10 Antony Roger Turner Plasterer's lining scraper
ITMI20100896A1 (it) * 2010-05-19 2011-11-20 Nespoli Group S P A Cazzuola per lavori di muratura e procedimento per produrre tale cazzuola

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE536164A (fr) *
US1524633A (en) * 1924-04-25 1925-01-27 Henry Disston & Sons Inc Trowel
US1617125A (en) * 1926-06-03 1927-02-08 Kuhar George Plumb trowel
US1865885A (en) * 1928-04-02 1932-07-05 Byhre Jacob Mortar hawk
US2616285A (en) * 1949-08-18 1952-11-04 Samuel T Shields Wall corner forming tool
DE1123061B (de) * 1958-09-08 1962-02-01 Graham Mfg Corp Vorrichtung zum Lichtbogen-Bolzenschweissen mit Keramikring
US3293402A (en) * 1963-08-05 1966-12-20 Omark Industries Inc Pneumatic operated welding stud holder
US3206788A (en) * 1964-04-01 1965-09-21 Roy C Hahn Adjustable taping knife
GB1252013A (fr) * 1967-12-20 1971-11-03
FR2281195A1 (fr) * 1974-08-07 1976-03-05 Beraud Ets M Procede d'emmanchement des poignees de prehension des truelles, platroirs ou autres outils

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Draht, Band 35, Nr. 4, April 1984 (Bamberg, DE), H. Grünauer: "Schmiede- und Fliesspressteile reibschweissen", Seiten 179-186 *
Patent Abstracts of Japan, Band 8, Nr. 270 (M-344) (1707), 11. Dezember 1984 & JP-A-59141379 (KAJIMA KENSETSU K.K.) 14-08-1984 *

Also Published As

Publication number Publication date
EP0288531A1 (fr) 1988-11-02
DE8705825U1 (de) 1987-11-12
WO1988003589A1 (fr) 1988-05-19

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