A fastening system for a rip-saw blade and a chipping edger

Abstract: 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 fastened in connection with the rip-saw blade or blades, and spacing sleeves (3) between the rip-saw blades. All 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).

Description: The object of the present invention is a fastening system for a rip-saw blade and a chipping edger, the system including a plurality of rip-saw blades, as well as chipping edgers each fastened in connection with one or more rip-saw blades, and spacing sleeves between the rip-saw blades, and where the rip-saw blades and chipping edgers, as well as the tightening sleeves on the both sides of the blade and edge unit and spacing sleeves, are tightened against each other on the turning arbor by a nut screwthreaded to the arbor and where the outer dimensions of the tightening sleeves and spacing sleeves are the same and the inner edge of the ring-shaped intermediate space in the chipping edgers between the chipping edger and the rip-saw blade, as seen in the radial direction, extends to the same point as does the outer diameter of the tightening sleeves and spacing sleeves. 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. US patent specifications 1,883,392 and 3,212,724 indeed relate to various blade fastening devices. Nevertheless, these saw devices involve far smaller tools than the ones described in the present patent application. The design and the size of the saw blades are such that they form small compact units, which do not entail the same problem as the rip-saw system of the patent application: in this, bending of the blades causes a minor problem, resolved by the system of the invention. In prior art, a rip-saw blade has also 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 each rip-saw blade has a hole, known per se, for a tooth of the chipping edger, and in that the intermediate space in the chipping edger is located inside the chipping edger in the radial direction of the tooth, so that the rip-saw blade can yield freely in either lateral direction. 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 dipicts 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 screwthreaded 14 to the arbor. 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 13 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.

Claims: A fastening system for a rip-saw blade (1) and a chipping edger (2), including two or several rip-saw blades, as well as chipping edgers each partly abutting one side of a rip-saw blade or blades, and spacing sleeves (3) between the rip-saw blades, and where the rip-saw blades and chipping edgers, as well as tightening sleeves (4) located at the outer sides of the chipping edgers (2) and said spacing sleeves (3), are tightened against each other on the turning arbor (5) by a nut (6) screwthreaded (14) to the arbor and where the outer dimensions of the tightening sleeves and spacing sleeves (3,4) are the same and where a ring-shaped intermediate space (9) in the chipping edgers (2) between the chipping edger and the rip-saw blade, as seen in the radial direction is provided, which intermediate space extends to the same point as does the outer diameter (D) of the tightening sleeves and spacing sleeves (3,4), characterized in that each rip-saw blade (1) has a hole (7), known per se, for a tooth (8) of the chipping edger, and in that the intermediate space (9) in the chipping edger is located inside the chipping edger in the radial direction of the tooth, so that the rip-saw blade can yield freely in either lateral direction.

Inventors: RAUTIO KAUKO, RAUTIO, KAUKO
Applicants: RAUTIO KAUKO, RAUTIO, KAUKO
Application year: 1992
Main classification: B27B33
IPC codes: B27B5, B27C9, B27B7, B27B33