DE8332854U1 - Device for a motor-driven hand planer for guiding workpieces - Google Patents

Description

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Patent - Management - GmbH
Theodor-Stern-Kai 1, 6000 Frankfurt

ES 63/21 Frankfurt, 25.10.19&THgr;3

——— Dr.lilf/Sch

Device for a machine driven hand lever for guiding workpieces

The invention relates to a device for a motor-driven hand plane for guiding workpieces to be machined on the upper support plate of the hand plane, which is temporarily arranged in a stationary manner for the intended machining processes.

Carrying out planing work with electromotor-driven hand planes that are installed in such a stationary manner that the support plate and the cutting blade of the plane are accessible from above makes planing workpieces difficult, despite the presence of a stop and a blade guard, in that the guidance, including the pressing of the workpiece in question, has to be carried out by hand, which on the one hand makes inaccuracies unavoidable and on the other hand there is a risk of injury. This is particularly the case when working on strips, etc.

The invention is based on the task of eliminating these deficiencies by means of a device that enables safe and secure machining of workpieces and also expands the machining options.

This object is achieved according to the invention in that the device has a stop rail that extends at least almost over the entire length of the support plate of the hand plane, which is provided with at least one holding element that engages behind the front of the support plate and contains a boom that extends vertically upwards, to which a hold-down device

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for the height-adjustable workpieces combined with a guide rail, which is guided in a known manner in a recess in the planer housing that runs parallel to the axis of the planer blades and can be locked in the desired position by means of a locking screw.

The measures specified in the subclaims comprise useful embodiments and further developments of the subject matter of the invention.

The invention is explained below with reference to the drawing, which illustrates an embodiment.

Shown: Fig. 1

Fig. 2

Fig.3

Fig

a front view of a stationary electric motor-driven one-hand planer with a support plate on top for the workpieces with a guide device attached,

a view of the hand plane according to Fig. 1 from the rear side, an analogue of the hand plane according to Figs. 1 and 2 in direction A ₁ a front view of the guide device.,

(as shown in Figures 1 to 3, the hand plane 1 is attached to a table top by means of two clamping jaws 2, 3 with associated screw clamps 4, 5, so that the support plate 6 of the hand plane lies above it and enables stationary processing of workpieces. For safety reasons, the planing knife 7 is covered with a plastic cover 8 which protects against the force of a reset flame.

A guide device is placed on the support plate 6 of the hand plane, which consists of a stop rail 9 extending over the entire length of the support plate and with its two ends projecting beyond the two front sides of the support plate, with an arm extending upwards at a right angle to it.

18.83/21

On the underside of one end of the stop rail, a holding element 11 is attached, which in the example is _designed as a bent, within limits resilient lever. The bent part 11 of the lever engages behind the front edge tZ

S of the support plate and is provided with a recess for receiving a screw 13, which sits non-rotatably in the recess and comes into contact with the head on the underside of the be seen.
The screw goes through the recess in the flap sarnie duvet»

A hole is drilled through the stop rail, running vertically along the support surface. A rotary knob containing a cutter is screwed onto the side of the screw protruding from the top of the stop rail. By means of this rotary knob, which is located on the _top of the stop rail via a lower clearance, the bent part of the bracket is height- adjustable in such a way that this part is pressed against the support plate or bent away from it to release it, depending on the direction in which the rotary knob is actuated. The stop rail can thus be attached in a simple manner and can also be removed easily. If necessary, another bracket of this type can be attached to the other end of the stop rail. The screw is inserted through a square recess in the bent part 11' of the holding element 11, into which the shaft of the screw, designed as a μβββββββ-» the helix, engages _against

Protected against twisting.

Instead of a bracket of the type described with the associated clamping device represented by the screw and the rotary knob with nut, differently designed clamping elements can be used that are suitable for fixing the stop rail in its position and enabling it to be moved sideways. On the arm 10 of the stop rail 9, which can be made of wood, metal, plastic

&bull; * material or a suitable material combination, a hold-down device 16 is attached for the workpieces, adjustable in height.

EE B3/21

For this purpose, the boom is provided with a horizontal through-hole for receiving a clamping screw 17, which is non-rotatably seated in the boom and can be tightened and released by means of a toggle handle 18 containing a nut ", which is supported on the boom via a washer.

The front button 2G of the clamping screw 17 overlaps a slot 21 of a support part 22 for the hold-down device 16 located between the screw head 2G and the front surface of the boom 1Q. By vertically displacing the support part 22 to

By loosening the clamping screw, the hold-down device can be

the desired or required height and then fixed in this position by tightening the clamping screw. The hold-down device 16 is under the influence of a spring that acts at least predominantly perpendicular to the plane of the support plate 6 and is therefore resiliently flexible.

In this case, the clamping screw 17 can also be secured against twisting in the boom, for example, by the through-hole on the screw head side comprising a square section, into which the correspondingly designed shaft section of the

Clamping screw fits.

For the purpose of parallel displacement of the stop rail 6, it is combined with a guide rail or with a guide bracket 23, which is guided in a manner known per se in a recess Zk in the planer housing that runs parallel to the axis of the planer blade 7 and can be locked in the desired displacement position by means of a locking screw. With the device according to the invention, it is easily possible to plane even relatively thin strips over their entire or partial surface.

3a It is important that the guiding hand is brought close to the planing knife, especially since the hold-down device also enables the use of a planing line and its defined guidance.

Claims (1)

1. Device for a motor-driven hand plane for guiding workpieces to be machined on the upper support plate of the hand plane which is temporarily stationary for the intended machining operations, characterized in that it has a guide rail (9) extending at least almost over the entire length of the support plate ( & ) of the hand plane, which is provided with at least one holding element (11) * which engages behind the front of the support plate and has a vertically upwardly extending Za' contains an extension arm (10) on which a hold-down device (IiS) for the planing door is combined in a height-adjustable manner with a guide rail which is guided in a recess in the planing housing running parallel to the axis of the planing knife in a manner known per se and which can be locked in the desired displacement position by means of a locking screw. 2. Device according to claim 1, characterized in that the element (11) for holding the stop rail is designed as a bent, within limits resilient tab, which is attached to the underside of the stop rail and has in its bent part, which engages behind the support plate, a recess for receiving a screw (13) which is guided non-rotatably in the recess, comes to rest on the underside of the tab at the head side and is guided through a hole in the stop rail running perpendicular to the support surface, and that the screw is height-adjustable by means of a rotary knob (1*0) containing a nut and supported on the top of the stop rail, so that the bent part of the tab can be adjusted depending on the rotary ES 83/21 direction of the rotary knob is pressed against the support plate or bends away from it. 3. Device according to claim 2, characterized in that the securing of the screw against twisting is realized by a polygonal recess in the bent part of the tab and by a matching polygon on the shaft part of the screw. k. Device according to claim 3, characterized in that the polygonal recess is designed as a square hole 5. Device according to claims 1 to k, characterized in that the stop rail is provided on both ends with at least one bent tab which engages behind the support plate of the hand plane. 6. Device according to claims 1 to 5, characterized in that the stop rail (9) with the vertical arm (10) consists of wood or metal. 7. Device according to claims 1 to 5, characterized in that the unit consisting of the stop rail (9) with the vertical boom (10) is made of a plastic. &bgr;. Device according to claims 1 to &THgr;, characterized in that the vertical boom has a horizontal through-hole for receiving a clamping screw which is non-rotatably seated in the boom and can be tightened and released, and that the front head (20) of the clamping screw overlaps the vertical slot (21) in a support part which receives the hold-down device (16) and is located between the front of the boom and the screw head, in such a way that this support part can be adjusted in height together with the hold-down device using the clamping screw. « Af "&idigr;&Lgr; * &diams; · · &bull;·&Lgr; 1 · · &diams; « · ssfl3/21 9. Device according to claim 1, characterized in that the hold-down device is under the action of a spring acting at least predominantly perpendicular to the plane of the support plate.