Patent Application
20080066602
Further features and advantages of the invention will become apparent from the description that follows of a preferred embodiment of the invention, with reference to the drawing. In the drawings:
In
As can be seen in
The base body can be held by a handle 16 mounted laterally on the body in angled fashion. The base body 12 comprises a first surface 13 on its upside and a second surface 15 at its bottom. A guide slot 14 of rectangular shape, serving to guide the tool 18 passed through the slot, extends between the first surface and the second surface.
In the illustrated case, the tool 18 consists of an oblong saw blade with a cutting edge 19 at its lower end, which is mounted on the drive shaft 20 of an oscillating drive 22 by its end opposite the cutting edge.
The oscillating drive 22 sets the drive shaft 20 in reciprocating oscillating movement about the longitudinal axis 24 of the drive shaft, as indicated by double arrow 26. As a rule, the drive operates at a high frequency of between 5,000 and 30,000 oscillations per minute, and with a small angle of swing of between 0.5 and 7 degrees.
Such a saw blade 18, set to oscillate in this way, can be used to produce slot-shaped cuts in numerous workpieces.
The device according to the invention serves in this case to precisely locate the cut and to ensure rectangular penetration of the saw blade into the workpiece 11 (schematically indicated by a dashed line in
The second lower surface 15 of the base body 12 is configured as a first guide surface 28 that serves to guide the device along a workpiece surface.
Further, the base body 12 carries a rectangular stop 32 with a stop plate 37 projecting at a right angle from the first guide surface 28. The surface of the stop plate 37 forms a second guide surface 30.
As the stop 32 can be adjusted in parallel to the first guide surface 28 (compare arrow 35), as will be explained in more detail below with reference to
In order to facilitate such adjustment, a mark 40, indicating the middle of the guide slot 14, is provided on both sides of the base body 12, with a scale 34 extending from that mark.
The stop 32 is stiffened by two stiffening ribs 33 that extend from the stop plate 37 to a plate 36 arranged at a right angle relative to the stop plate 37. The plate 36 serves as guide element as guidance along a seat 52 (
Once the position of the stop has been adjusted, it can be fixed in that position by threaded coupling pieces 44 in the form of small plates that are received on the bottom of the base body and that partly cover the guide element 36 laterally. The threaded coupling pieces 44 are held by screws 46 that are screwed into the surface 13 on the upside of the base body 12 and through the latter and that engage in the threaded coupling pieces 44. It is thereby possible to release the stop 32 in a desired position on the base body by untightening the screws 46, and to fix the stop 32 by tightening the screws 34 upon completion of the adjustment. This permits the spacing between the second guide surface 30 and the guide slot 14 to be preadjusted before a cut is made.
The base body 12 is passed by a plurality of openings 48, 50 that may serve for fixing the base body 12 on the workpiece, prior to making a cut, or that alternatively may be used as drilling jig when bores are to be produced. If the openings are to be used for the production of bores, then preferably metal inserts may be placed in the openings in order to prevent varying bore diameters as well as premature wear.
The base body 12 and the handle 16 may be formed as one integral injection-molded plastic part with a continuous surface on the side 13, and with a configuration as a hollow profile the bottom 15 of which is merely defined by a series of webs 54 that extend in downward direction thereby defining the first guide surface 28. The guide slot 14 is formed in an insert 42 made from a metal, preferably from steel.
The stop 32 may be configured as an injection-molded plastic part as well.
The stop plate 37 may be additionally passed by one or more holes 39, for example in the form of three slots that extend in the stop plate 37 from the top to the bottom, in parallel to the lateral outer surfaces.
The slots on the one hand serve to save weight and, on the other hand, may be used for temporarily fixing the device 10 on the workpiece surface before a cut is made, for example by tightening of a screw.
| Number | Date | Country | Kind |
|---|---|---|---|
| 20 2006 014 895.7 | Sep 2006 | DE | national |
