WO1982002685A1

WO1982002685A1 - Plane for edges

Info

Publication number: WO1982002685A1
Application number: PCT/EP1982/000016
Authority: WO
Inventors: Henriette Magler
Original assignee: Walder Wolfgang
Priority date: 1981-02-03
Filing date: 1982-01-30
Publication date: 1982-08-19
Also published as: ES262891U; AT368735B; DE3264350D1; EP0057455A2; ATA48181A; EP0057455A3; EP0057455B1; ES262891Y

Abstract

To plane simultaneously two opposite surfaces of a piece, for exemple a pannel, and to clean and bland the edges, the plane, particularly a hand plane, has two similar tool holders (1, 2). Both tool holders (1, 2) are arranged facing each other and are joined by a device (4, 7, 36-39) allowing the adjustment of their distance in order to adapt them to the distances of surfaces or edges to beplaned. Preferably, the adjustment device is comprised of at least one spring (4).

Description

- I

EDGING PLANE

The invention relates to an edge planer with two cutting guides which are at an angle to one another, in particular perpendicular to one another, e.g. Guide surfaces, on a tool holder, on which at least one cutting tool for a cut can be fastened, which extends at least near the guide plane of at least one of these cutting guides.

Edge planes of this type are known in various designs. Usually two cut guide surfaces are provided, which are applied to the two edge surfaces of the edge to be machined, but it is also known to use appropriately arranged rollers instead of flat surfaces. The edges to be machined are generally perpendicular to one another, which is why this is also the case with the cutting guide surfaces of the known edge planers, but it has also already been proposed to arrange the cutting guide surfaces at a different angle to one another in order to be able to adapt to other edge conditions.

A knife is usually used as a tool, although other cutting tools have also already been proposed. Typical designs of such edge planers can be found in DE-OSes 1,728,610 and 2,931,846, in DD-PSen 994 and 97,585, as well as in US-PS 3,120,055 Knives become known.

Conventionally, such edge planers are used to clean the edges of panels that have been provided with a wood or plastic veneer, that is to say, to separate excess veneer residues smoothly and continuously. Usually these are Provide panels with a veneer on several surfaces, or when a veneer is glued to the edge surface, the edge remains to be cleaned on both sides. There are two problems with conventional edge planing. On the one hand, the two cutting guides of the edge planer have to be pressed with great force against the two corresponding surfaces of the plate in order to ensure a straight cutting course and not to be led away from the edge by the grain. The force applied naturally requires a corresponding back pressure on the plate, so that the work with these edge planers is relatively laborious overall.

On the other hand, in the known design, each edge has to be machined for itself, which in addition to the effort also incurs corresponding labor costs.

The invention is based on the object of enabling faster work, the cutting guides being able to be applied to the associated surfaces with less effort. This is achieved according to the invention in that, in order to machine both edges on the surfaces of a plate or the like, two tool holders of essentially the same design are connected to one another, facing each other, by means of a spacing device with an adjustable distance. This is not a mere duplication of known edge planes, but rather the surprising advantage is that the force previously required for the guidance can be largely reduced. The two tool holders face each other, ie they are arranged in mirror image to each other. - S -

The force for guiding the edge planer and the counterpressure on the plate are particularly simple if, according to a preferred embodiment, each of the two tool holders has a gripping surface, in particular one facing away from the other. The pressure on one grip surface forms the counter pressure against the other grip surface.

According to one embodiment, at least one threaded spindle, screw or the like can be provided as the spacing device, which is set at the start of the work to a predetermined distance between the two edges to be machined. In this case, too, the guides of the edge planer abut on the assigned surfaces of the plate without any special force having to be used.

Preferably, however, at least one spring is provided as a spacer between the two tool holders because, as a rule, the pieces to be machined are not so dimensionally accurate that the fixed distance of the spacer could be sufficient. Such tolerances can be compensated for by the spring.

With such a design, at least one, preferably two, tension springs can be provided as the spring between the tool holders, with in particular at least one spring being assigned an adjusting device for adjusting its tensile force. The tension spring can then immediately apply at least part of the force required for the guides to bear against the associated surfaces of a plate or the like. The adjustment device is advantageous. either to match their tensile force to one another when two tension springs are arranged and thus to achieve a uniform cutting - H - to secure the course, or to be able to adjust the contact pressure to be applied for the guides on the workpiece, depending on the type of the workpiece, even if there is only one spring.

Particularly for work that requires increased sensitivity, however, it is expedient if at least one, preferably two, compression springs are provided as springs between the two tool holders, because the contact pressure can then be regulated more easily by hand. If each tool holder has a gripping surface, both tool holders can be comfortably gripped with one hand, and the two tool holders are involuntarily pressed together under this handle against spring force. The guides of the edge plane on the surfaces of the plate or the like also result automatically because the hand itself exerts force and counterforce. Nevertheless, it is also conceivable in this embodiment that the clamping is carried out against the force of one or more compression springs with the aid of a clamping device, for example formed by the mentioned threaded spindle or screw.

In the simplest case, springs may be sufficient for the spacing device. However, it may be disturbing that the two tool holders can then move against each other in the machining direction, which is always to be feared in that case when the tool of one of the two tool carriers is hanging on a wood chip, a branch or the like remains. The spring can easily be bent, overstretched or otherwise damaged. This disadvantage can be avoided in that the spacing device has at least one guide rod between the two tool holders, which therefore prevents a relative displacement in the longitudinal direction.

In the context of the invention, the arrangement can be such that the guide rod is hollow and carries a screw or spring inside, which is then protected. Moreover, such an arrangement is less space-consuming.

A further advantageous embodiment consists in that the spring is releasably connected to at least one tool holder and is not, for example, firmly anchored (in the case of a leaf spring, for example, by rivets or the like). This makes it possible for workpieces where only. an edge is to be machined, to separate the two tool holders and to use one of them like a conventional edge planer in the usual way.

Since the design according to the invention saves power, the design can preferably be carried out in such a way that pre-cutting and post-cutting are carried out with one machining operation, by means of the spacing device, in addition two knives, preferably arranged on the tool holders at an angle to the guide plane are also kept at a distance with a cutting edge lying at an angle to the guide plane. In this case, the first knives perform the pre-cut, whereas the additional knives cut a facet on the first cut. This is possible through the design according to the invention, although the pressure force must now be applied for two pairs of knives.

Further details of the invention will become apparent from the following description of an embodiment shown schematically in the drawing.

OMPI b -

Fig. 1 shows a workpiece including an end view of an edge planer according to the invention, of which the

2 is a side view in the direction of arrow II of FIG. 1,

2A shows a section along the line A-A of Fig. 2, and

Fig. 3 illustrate a view of a tool holder approximately along the line III-III of Fig. 1.

Fig. 4 shows a detail on a tool holder for

Adjusting the tension of a tension spring; and on the basis of

Fig. 5 is another embodiment orm explained.

1, two approximately mirror-symmetrical tool holders 1, 2, preferably made of plastic, are provided. In the exemplary embodiment shown, the two tool holders 1, 2 are connected to one another via two guide rods, each consisting of telescopically telescopic tube sleeves 6, 7, but the connection can - as mentioned at the beginning - also be made in other ways. Each of the tool holders 1, 2 has on its underside a recess 3 with two mutually perpendicular surfaces 22, 23, on which the edge planer 1, 2 is guided along the corresponding surfaces of the respective workpiece 100.

The two tube sleeves 6, 7 are each either firmly connected to the tool holders 1, 2, possibly even made in one piece with them, or only inserted into corresponding bores which have a corresponding pressure gauge. The length of the tubular sleeves 6, 7 is dimensioned such that both tool holders 1, 2 can be pressed against each other against the pressure of a helical spring 4 until they come into contact with one another. f ^~

Instead of a compression spring, the helical spring 4 can, if desired, also be designed as a tension spring, the two tool holders 1, 2 being pulled apart and placed on the plate 100 to be machined for machining a workpiece. The train can optionally be adjustable by a construction according to FIG. 4.

The coil springs 4 are enclosed by the telescopic guide rods 6, 7 and are protected inside. Parts 4 to 7 keep the two tool holders at a distance at an adjustable distance. However, it is easy to imagine that when using tension springs, parts 4 to 7 reverse the respective minimum distance. This makes it easy to adapt to standard board thicknesses - usually 12 to 24 mm. It is also easy to understand that the two tool holders 1, 2 can then be easily separated from one another and used for processing individual edges, for example on the edge of wide areas, if the ends of the springs 4 are not anchored to the body of the tool holder (for example embedded in the plastic). Detaching the two tool holders 1, 2 from one another is particularly possible, for example, in that the springs 4 are loosely inserted into the sleeves 6, 7 (in the case of compression springs). Another detachable fastening results from the example of tension springs with reference to Fig. 4-. If necessary, the sleeves themselves can only be inserted into the associated bores, but they are then expediently designed as a plug connection so that the two tool holders, especially under the Pressure of the springs 4 cannot be unintentionally separated when being put down. For this purpose, one-piece sleeves 6 (similar to FIG. 4) 3.x> with their ends from their outer surface - § -

Cut out spring tongues are provided, each having at the end radially outwardly projecting flanges which are guided in longitudinal grooves of the tool holder 1, 2 receiving the sleeves which do not completely reach the open end. When the sleeves are inserted into these bores, the spring tongues are either pressed down by hand or are provided with oblique lugs which depress the spring tongues when they are inserted. Likewise, when separating the two tool holders from one another, the spring tongues either have to be pressed down by hand or also have a bevel on this side, which slides over the wall closing off the longitudinal groove on the outside.

Grooves 8 are provided within the recess 3 for receiving the protruding veneer edges to be planed. As can be seen, the grooves 8 each extend from one guide surface 22 flush with the boundary surface of the recess 3 forming the other guide surface 23. As can be seen from FIGS. 2 and 3, the respective groove 8 is approximately in the middle of the edge planer connected to an outlet opening 10 for the edge projections to be separated.

A wall 26 of the respective outlet opening 10 extends to the recess 3 at an angle β of approximately 40 °. A re-cutting knife 12 is fastened to this wall 26 by means of a screw 17, a wedge 19 or the like being preferably provided on it for better fixation. In a further groove 14 running perpendicular to the recess 3, a pre-cutting knife 16 is attached to each tool holder 1 or 2 by means of a screw 18, the cutting edge of which lies approximately in the plane of the side surface 22 of the recess 3. However, the contact surface 24 of the pre-cutting knife 16 is inclined at an angle et slightly, for example by approximately 3 ° to 5 °, to the cutting direction of the edge planer. 3 -

The pre-cutting knife 16 cuts parallel to or, if necessary, in alignment with the workpiece surface 122 or 222, e.g. on ironed-on, edge covering 47 approximately along dash-dotted line 116. In contrast, the cutting course of the re-cutting knife 12 is chosen in accordance with the line 112, so that the covering edge pre-cut by the pre-cutting knife 16 is chamfered. This cuts a facet on the pre-cut edge, eliminating the need for rework. Each knife can be provided with an elongated hole 20 to adjust the depth of cut.

If the two workpiece surfaces 122, 222 are not parallel to one another, but instead, for example, converge to the outside, an edge planer can be used, the guide surfaces 22 of which are also inclined or can even be adjusted in a known manner. Instead of the aligned position of the cutting line 116, this can, if desired, be offset inwards or outwards relative to the plane of the workpiece surface 122 or 222 (on which the guide surfaces 22 of the edge planer are guided). As can be seen, the plate 100 is provided with a side veneer 46, which also has to be cut after the gluing. In this case, edge protrusions 146 indicated by dashed lines are to be separated, for which purpose the edge planer according to the invention can optionally be equipped or optionally equipped in a manner not shown, each with a knife lying approximately in the plane of the guide surface 23.

When using a compression spring 4 each, the edge planer is gripped on two mutually opposing

_ Overlying and facing away grip surfaces 28, 9 towards the front (in the cutting direction), which have an arrow 21 indicating the cutting direction, so that under the pressure of the hand, the surfaces 22 and ultimately also the surfaces 23 automatically come into contact with the associated counter surfaces of the workpiece. If, however, a tension spring is provided, the two Werkzeug¬ holders 1, 2 until against this spring auseinander¬ pulled ^{^"the"} train and placed astride auf¬ to the edge to be machined must.

In the embodiment according to FIG. 1, a screw sleeve 31 with a fit is inserted into a bore 30 of the tool holder 1, into which a hollow screw 3 is screwed. The screw 32 can be screwed more or less deeply into the sleeve 31 with the aid of a knurled wheel 33 and carries in its interior the helical spring 4 which is designed as a tension spring and which has an end 4 'on an outer surface of the knurled wheel 33 or on an intermediate surface Washer 34 supporting pin 35 is releasably anchored.

According to FIG. 5, the two tool holders 1, 2 are connected to one another at the height of the knives 16 (which are only available here), which is screwed into screw sleeves 37, 38 inserted into the openings of the tool holders 1, 2. As can be seen, the screw spindle 36 has two threads with different pitch directions, one of which interacts with the screw sleeve 37, the other with the screw sleeve 38. By turning an actuating button 39, the two tool holders 1, 2 can thus be brought into any desired distance, whereby they can in turn be guided by guide rods 6. If necessary, two such screw spindles 36 can also be provided, which are then expediently connected to one another for common rotation. In a simplified embodiment, the sleeve 38 together with the associated thread of the spindle 36 can also be - / I -

fall, so that the latter can essentially be formed by a normal screw. In this case, it may be advantageous for the guided loosely on the bolt tool holder 1, a compression spring, for example, is respectively provided in the hollow Führungssta ^'hgeri. 6

5 also shows the previously mentioned snap connection of the guide rods 6 with the tool holder 1. With the tool holder 2, the guide rods 6 are either permanently connected or can have such snap connections in a manner not shown. In this case, spring tongues 40 are cut out of the jacket of the guide rods 6 and have lugs 41 projecting radially outwards at their ends. These lugs preferably have two ramp bevels 42, 43 inclined towards each other in a roof-like manner and engage in longitudinal grooves 44, which are closed at the front, in the bores of the tool holders 1, 2 that guide the guide rods 6. If, therefore, the screw sleeve 38 with the associated thread of the spindle 36 is omitted and a compression spring is inserted into the guide rods, the lugs 41 prevent the compression springs from further pressing the two tool holders when they strike the front wall 45 delimiting the groove 44 push apart and unintentionally separate them. This is only arbitrary after overcoming the relatively strong spring tongue force, i.e. by hand, possible. In order not to weaken the guide rods too much, it is expedient to arrange such spring tongues for the tool holder 2 offset by approximately 90 ° and accordingly to arrange the associated groove on the tool holder 2 also offset accordingly.

Although an edge planer with two guide surfaces 22 which are perpendicular to one another has been described above, it goes without saying that the invention also has another with one another - I T. -

Guide surfaces including angles can be realized. Instead of the snap connection 40-44 described, any other type of connection can also be provided. The tool holders 1, 2 can also have at least two knives each arranged in the planes 22 and 23. If, in the case of the embodiment in FIG. 5, a pre-cutting knife 12 or 16 (see FIGS. 1 to 3) is to be provided, the spindle 36 is expediently arranged in between. It has also already been mentioned that instead of the coil springs, 4 leaf springs can be advantageous.

Claims

PATENT CLAIMS

1. Edge planer with two mutually angled, in particular mutually perpendicular, cutting guides, for example guide surfaces, on a tool holder on which at least one cutting tool for a cut can be fastened, which extends at least near the guide plane of at least one of these cutting guides, thereby characterized in that for machining both edges on the surfaces of a plate or the like (100) two essentially identical tool holders (1, 2) facing each other are connected to one another via a spacing device (4-7 _. 36-39) adjustable distance.

2. Edge planer according to claim 1, characterized in that each of the two tool holders (1, 2) has one, in particular the other facing away, handle surface (29 or 28).

3- edge planer according to claim 1 or 2, characterized in that at least one threaded spindle (36), screw or the like is provided as a spacer (FIG. 5) -

4. Edge planer according to claim 1 or 2, characterized in that at least one spring (4) between the two tool holders (1, 2) is provided as the spacing device.

5. Edge planer according to claim 4, characterized in that at least one, preferably two, compression springs (4) are provided between the two tool holders (1, 2) as the spring.

6. Edge planer according to claim 4, characterized in that at least one, preferably two, tension springs (4) are provided as the spring between the two tool holders (1, 2), in particular at least one spring (4) having an adjusting device (31- 35) is assigned to adjust their pulling force.

7- edge planer according to one of the preceding claims, characterized in that the spacing device (4-7 _. 36-39) has at least one, in particular telescopic, guide rod (6, 7) between the two tool holders (1, 2) having.

8. edge planer according to one of claims 4 to 7, characterized in that the guide rod (6, 7) is hollow and carries a coil spring (4) in its interior.

Q. Edge planer according to one of claims 4 to 8, characterized in that the spring (4) is detachably connected to at least one tool holder (1 or 2).

10. Edge planer according to one of claims 1 to 9, characterized in that for the simultaneous pre- and post-cutting of both edges two additional on the tool holder (1, 2) obliquely to the guide plane arranged knife (12), preferably also with one Cutting edge lying at an angle to the guide plane, by means of which the spacing device (4 - 7) is kept at a distance.