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Dokumentenidentifikation EP0543789 06.11.1997
EP-Veröffentlichungsnummer 0543789
Titel Befestigungsanordnung für im Kreissägeblatt zum Längssägen und einen Kantenschneider
Anmelder Rautio, Kauko, Mäntyharju, FI
Erfinder Rautio, Kauko, Mäntyharju, FI
Vertreter H. Weickmann und Kollegen, 81679 München
DE-Aktenzeichen 69222506
Vertragsstaaten AT, BE, DE, ES, FR, SE
Sprache des Dokument En
EP-Anmeldetag 29.10.1992
EP-Aktenzeichen 928502558
EP-Offenlegungsdatum 26.05.1993
EP date of grant 01.10.1997
Veröffentlichungstag im Patentblatt 06.11.1997
IPC-Hauptklasse B27B 33/20
IPC-Nebenklasse B27B 5/34   

Beschreibung[en]

The object of the present invention is a fastening system for a rip-saw blade and a chipping edger, the system including one rip-saw blade or a plurality of rip-saw blades, as well as chipping edgers fastened in connection with the rip-saw blade or blades, and spacing sleeves between the rip-saw blades. Fastening systems of this type are used in saw-benches, such as hewing saws and resaws. For example, DE Patent 35 08 716 discloses one prior-art fastening system of this type for a rip-saw blade and a chipping edger.

In prior art, a rip-saw blade has been secured to a chipping edger by means of, for example, screws as close as possible to the cutting teeth of the chipping edger in such a way that wood material would not be wedged between the rip-saw blade and the chipping edger. Even though a hole has been made in the rip-saw blade in the area of the tooth of the chipping edger, there has, nevertheless, been the problem of wood material wedging between the chipping edger and the rip-saw blade. This results in the rip-saw blade bending. When the load is in the opposite direction, the rip-saw blade will yield in other parts except in the area of the attachment of the chipping edger, at which it will rub against the wood, heat up, bend, and burn the surface of the wood.

The object of the invention is to eliminate the disadvantages described above. The fastening system according to the invention for a rip-saw blade and a chipping edger is characterized in that all the tools, the rip-saw blades and chipping edgers, as well as the tightening sleeves and spacing sleeves, are tightened against each other on the turning arbor by means of a tightening member such as a nut.

One preferred embodiment of the invention is characterized in that the pressing of the rip-saw blades and the chipping edgers against each other takes place in the axial direction by mediation of sleeves.

Another embodiment of the invention is characterized in that the rip-saw blade has a hole, known per se, for the tooth of the chipping edger, and that on the inside of the chipping edger in the radial direction of the chipping edge tooth, between the chipping edger and the rip-saw blade, there is an intermediate space in the chipping edger so that the rip-saw blade can freely yield in either lateral direction.

A third embodiment of the invention is characterized in that the outer diameters of the tightening sleeves and the spacing sleeves are the same.

With the help of the invention, the rip-saw blade may thus freely move in the lateral directions under lateral forces. Any wood material ending up between the rip-saw blade and the chipping edger now has free access into the space in between, from where it will come out with equal ease. As the rip-saw blade can thus yield freely, it will not heat up or bend, and thus will not burn the wood surface at the machining stage. The work steps relating to screws, holes and threads, and any associated work steps, are eliminated. The replacement of tools and maintenance steps are also more rapid, since all the tools can be detached from each other by means of one and the same nut.

The invention is described below with the help of an example, with reference to the accompanying drawings, in which

  • Figure 1 depicts a rip-saw blade and a chipping edger as seen in the direction of the arbor, and
  • Figure 2 depicts a cross sectional view of the rip-saw blade and the chipping edger.

The fastening system for a rip-saw blade 1 and a chipping edger 2 includes three rip-saw blades, as well as chipping edgers fastened in connection with the outermost rip-saw blades. Between the rip-saw blades 1 there are spacing sleeves 3. All the tools, rip-saw blades 1 and chipping edgers 2, as well as the tightening sleeves 4 and spacing sleeves 3, are tightened against each other on the turning arbor by means of a nut 6. The rip-saw blade 1 has a hole 7 for the tooth 8 of the chipping edger 2. Inside the chipping edger 1 in the radial direction of the tooth 8, between the chipping edger and the rip-saw blade 1, there is an intermediate space 9 in the chipping edger 2 so that the rip-saw blade can freely yield in either lateral direction. The inner edge of the intermediate space 9, as seen in the radial direction, extends to the same point as does the outer diameter D of the tightening sleeves and spacing sleeves 3, 4. Between the rip-saw blade 1 and the chipping edger 2 there is a guide stud 12, which keeps the parts synchronized in relation to each other so that the tooth will remain in the area of the hole 7. The entire tool assembly is tightened by means of a bolt 10 to the turning arbor 11, which is in a manner known per se connected to a power source, i.e. an electric motor.


Anspruch[en]
  1. A fastening system for a rip-saw blade (1) and a chipping edger (2), including one or several rip-saw blades, as well as chipping edgers secured in connection with the rip-saw blade or blades, and spacing sleeves (3) between the rip-saw blades, characterized in that all of the tools, the rip-saw blades and chipping edgers, as well as any necessary tightening sleeves (4) and spacing sleeves (3), are tightened against each other on the turning arbor (5) by means of a tightening member such as a nut (6).
  2. A fastening system according to Claim 1, characterized in that the pressing of the rip-saw blades (1) and the chipping edgers (2) against each other takes place in the axial direction, by mediation of sleeves (3, 4).
  3. A fastening system according to Claim 1 and 2, characterized in that the rip-saw blade (1) has a hole (7), known per se, for the tooth (8) of the chipping edger, and that inside the chipping edger in the radial direction of the tooth, between the chipping edger and the rip-saw blade, there is an intermediate space (9) in the chipping edger so that the rip-saw blade can yield freely in either lateral direction.
  4. A fastening system according to any of the above claims, characterized in that the outer dimensions of the tightening sleeves and intermediate sleeves (3, 4) are the same and that the inner edge of the intermediate space (9), as seen in the radial direction, extends to the same point as does the outer diameter (D) of the tightening sleeves and intermediate sleeves (3, 4).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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