DE20209002U1 - Dowel milling machine - Google Patents

Description

White Günther

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Description:

Dowel hole milling machine for milling one or more dowel holes at the same time.

(State of the art)

There are already some machines on the market that perform this process in a similar way. This involves milling with a saw blade (Fa.

Lamello) which make an oval cut transverse to the attached surface. Or a machine which drills dowel holes in a round shape into a wooden workpiece (Fa.

Maffel).

(State of the art)

There are also machines that perform milling operations vertically in the direction of the wood surface.

These devices are usually stationary or only intended for rough milling (e.g. door locks or for carpentry to connect beams); thus they are not suitable for the precise (exact) assembly of wooden components, such as in furniture carpentry.

The invention is based on the problem: to mill dowel holes of variable depth, width and shape in any desired part, including squared timber parts, quickly, conveniently and precisely fitting one another in order to attach both narrow workpieces (e.g. 3 cm) and wide workpieces (several 10 cm), whereby the parts connecting to one another have a certain lateral tolerance.

The machine with the features specified in the protection claim solves this problem.

The advantage of my wood connection is that the milling does not extend across the wood surface to be milled, but rather into it. This means that very narrow and very wide pieces of wood can be aligned and connected (glued) precisely and at the exact height. (See Fig. 2 Sheet 4)

The height of the milling depends on the height stop of the machine and thus enables the exact height of the milling to be maintained on both pieces of wood. This height stop is attached at a 90° angle to the surface to be milled and can be folded upwards. The height stop is also adjustable. (See sheet 4, Fig. 1)

Since the special dowel for gluing is just as thick as the milling, the wooden parts are guided precisely in height.

However, since the width of the special dowel does not correspond to that of the dowel hole, it is possible to move the two wooden parts sideways.

Weiß Günther - Sheet 2 -

In the case of narrow pieces of wood, the wooden dowels described on the accompanying sheet (see Fig. 2, sheet 4) can be used to achieve a connection that is precisely at the right height and, thanks to the shape of the wooden dowel, is torsion-free and therefore cannot rotate.

Since the height stop is adjustable, the dowel hole can be adapted to the workpiece in order to be able to connect wooden parts that do not have the same height.

By changing the milling insert, both small dowel holes (frames for furniture doors) and very large dowel holes (bed connections or beams) can be milled. This allows small and large wooden parts to be firmly and stably connected (glued) to one another.

The connection can be used for both visible and hidden areas.

Structure of the machine.

The motor of the hand-held machine transmits its rotary motion to the milling chain of the "sword", like a chainsaw or chain mortiser, which is attached to the underside of the hand-held machine.

The machine is equipped with a sliding mechanism with which the "sword" slides into the workpiece and thus enables dowel milling (= dowel hole) (like a lamello milling machine).

The depth of the dowel milling can be variably adjusted using a scale and a mechanism.

By removing the base plate, you can use a tool or your hand to loosen the screws or other mechanisms that attach the blade in order to change different milling attachments in thickness, width and shape. This means that the dowel hole can be adapted to different pieces of wood easily and very quickly.

In order to prevent the machine from accidentally slipping on the workpiece during milling, several small countersunk mandrels are attached to the surface facing the workpiece. These mandrels either stand firmly or press into the wooden part to be joined to stabilize it when the machine is pressed against it.

Claims (2)

1. Dowel milling machine for milling one or more dowel holes simultaneously, preferably for joining wooden parts, characterized in that 1. the machine has one or more blades (milling insert) with a rotating chain (such as a chainsaw or chain mortising machine) - the machine is portable and very mobile (hand-held machine), - the machine can accommodate various milling inserts, - the milling insert can be quickly replaced. 2. The anchor is characterised in that 1. it has the same shape as the milling insert of the dowel milling machine, - it is as thick as the milling insert, - it is narrower in width than the milling insert - it has grooves, holes or other unevenness in the lengthwise, crosswise or other direction in order to be able to absorb the glue. - it can be made of wood, plastic, metal or other materials.