EP1693170A1 - Protective and guiding device for a cutting or grinding apparatus and cutting or grinding apparatus with such a protective and guiding device - Google Patents

Abstract

The protection and guiding device (2) has a degree of freedom which is independent of translatory degree of freedom between housing (1) and tool (8). An outlet for the tool is so arranged in the device so that the tool can penetrate both the outlets. An independent claim is also included for separating and grinding device.

Description

Technical area

The invention relates to the technical field of separation and grinding equipment and their protection and leadership facilities.

• einem im wesentlichen hohl ausgebildeten Gehäuse zur Aufnahme eines rotierenden Werkzeugs in der Ausbildung einer Trennscheibe, Schleifscheibe oder dergleichen, sowie
• einem translatorischen Freiheitsgrad zwischen Gehäuse und Werkzeug, so dass das Werkzeug relativ zum Gehäuse verschieblich bewegbar ist, und
• einer Austrittsöffnung, die von dem Werkzeug zumindest teilweise durchdringbar ist.

In particular, the invention relates to a protective and guiding device for a separating or grinding device and to a separating or grinding device with such a protective and guiding device for separating and / or grinding materials, in particular for cutting out built-in masonry windows, doors and the like, consisting of

• a substantially hollow housing for receiving a rotating tool in the formation of a cutting wheel, grinding wheel or the like, as well as
• a translatory degree of freedom between the housing and the tool, so that the tool is displaceably movable relative to the housing, and
• an outlet opening, which is at least partially penetrable by the tool.

definitions

The device described herein has the function of machining objects mechanically. In particular, it is provided to saw selected objects, or otherwise separate. The term "machining with the device or its tool" is understood as cutting, milling, grinding, planing or similar mechanical machining. In the following, only separation or grinding is used, in which case all the aforementioned processing methods are understood.

The term "protection and guidance device" is understood to mean a device which can be adapted as an adapter to a drive unit, for example to a hand-held machine tool the size of a hand drill. In this case, the tool and drive unit form a unit which are movable relative to the protective and guide device. As a rule, the protective and guiding device serves to receive a tool, for example a cutting disc or a saw blade, this being completely enclosed. Furthermore, the protective and guide device serves as a system and guide device, so that by moving the drive unit, the tool for separating, grinding or the like from the protective and guide device during the machining process can be brought out.

The term "backdrop" means means that cause the tool to move relative to the protection and guide means. For example, the backdrop may be a slot guide in the protective and guiding device is provided. The bearing of the rotating tool is guided along this slot guide. Furthermore, the term "backdrop" is understood to mean a guide device on which, for example, carriages are guided. As exemplary embodiments, linear guides can be provided.

State of the art

When renovating old buildings, it is known that window frames must be removed from the masonry, so that they can be replaced by new ones. For this purpose, it is necessary to remove the usually formed from wood frame by means of a separator of the masonry. Here, in particular, metal elements that fix the frame to the masonry to remove in a separate or the same step.

Both a method and a device for exchanging a window are known from the prior art, for example from DE 44 29 388 A1. The method is characterized in that a frame of a window to be renovated is separated out with a device according to the invention. Said device has a tool in the form of a cutting disc, which is arranged rotatably and pivotally on a fixing device. By this arrangement, it is possible that the cutting disc in the corners of a window frame and in the corners, formed by window frames and masonry, can penetrate. Preferably, the separator penetrates obliquely, for example at an angle of 45 degrees.

In order to allow the penetration of the cutting disc, it is provided to move the cutting disc translationally in a predetermined direction.

From DE 299 09 449 a device is also known, by means of which in particular in the window area metal parts which fix the window frame, can be removed.

The hand-held implement presented herein has a drive unit, wherein the drive unit is coupled to a protective and guide device. Within the protection and guide device a cutting disc is mounted. The cutting disc is in turn directly coupled to the drive unit and is rotated by this. Drive unit and cutting disc are movable relative to the protection and guide device. The protective and guide device itself is designed such that in the idle state, the cutting disc is arranged directly in the housing. This avoids that the cutting disc is damaged in any way during transport and further avoids that people can be injured by improper handling of the manual tool. As a result of the relative movements, when the protective and guiding device is firmly in contact, the separating disk can be moved translationally in one direction in such a way that it emerges from the protective and guiding device via an outlet opening. If the entire hand tool is removed from the processing situation, then a return mechanism ensures that the cutting wheel is automatically guided back into the protection and guide device.

The user usually attacks the manual tool on the drive unit, sets the manual tool together with the protection and guide device to the window frame and triggers the drive or the rotation of the tool. A translational movement - caused by a manual movement - causes the rotating cutting disc to be fed with an advance and thus brought into a single predetermined defined direction. In this case, the cutting disc exits the protective and guiding device, wherein the protective and guide device itself remains stationary. If processing in a further direction is desired, the workflow process is repeated in such a way that the protective and guide device is newly set together with the drive unit. However, the processing can only be done in one direction. Processing in the range of an angle, for example within a window corner, is not possible in this way.

In general, this is remedied that the protective and guide device is set obliquely together with the drive unit in the corner of a window frame. The danger, however, is that the per se at right angles trained protection and guide device does not completely rests and thus only selectively charged and the user is exposed to an increased risk of injury. In addition, a good quality cut result is not to be expected in this way. Furthermore, the user is exposed to a high dust load.

Another disadvantage of the known device is that the user must apply directly to the drive unit with its power guide, so that a torque is created, which means that the protection and guide device can not lie correctly flat at the preferred angle.

From EP 0 109 632 A1 a protective housing for a saw blade of a circular saw is known. The saw blade is mounted centrally on a saw shaft, which in turn is mounted on a sliding saw carriage. The saw blade can be guided along a slot gate in one direction to an outlet opening in the protective housing.

From US 1 107 316 a protective housing is also known, in which a saw blade is mounted. The protective housing is specially designed in its contour so that it can be attached to a corner formed at an angle of 90 degrees. The saw blade can be guided from an exit opening into the angle. Again, the blade is feasible along a slot gate with a translational degree of freedom.

From US 4 022 182 a portable protective housing for a saw blade of a circular saw is known. The saw blade can be guided out of the protective housing along a slot gate (which has a radius in the example shown here).

The aforementioned embodiments of the prior art all have the disadvantage that they can only be used for a specially designed application. A flexible application such that the saw blade either to one or to other side or in the angle is feasible, is not provided. Different special versions of protective housings or protective and guiding equipment are necessary for each of the above-mentioned applications. In addition, only the movement of the tool in a given direction is possible.

Object of the invention

The object of the invention is to develop the protective and guiding device and a device with such a device such that at least one disadvantage of the prior art is avoided.

Solution of the task

The main idea of the solution of the problem is to provide a device and a protective and guiding device with which the tool can be led out either from one, from another or both outlet openings for mechanical processing.

For this purpose, it is necessary that the protective and guide device has a further translational degree of freedom and a further outlet opening, from which at least partially the tool for processing can escape.

The solution of the problem is solved by the characterizing part of claim 1.

Advantages of the invention

The invention is based on one of the significant advantages that acute angle, but also obtuse angles can be achieved equally by the two translational movements of the tool, which is arranged in its initial position within the protective and guiding device. For this it is not necessary, the protection and guide device together with the drive unit in a not for it create provided angle. It is sufficient if the protective and guiding device is arranged flat on a support, for example on a window sill or on a window frame.

For the processing, it is provided that by moving the drive unit, for example by a arranged on the drive unit handle, a relative movement between the protective and guide means and the drive unit can be exercised, the movements is predetermined by arranged scenes. It can be provided that the relative movement against a predetermined force, such as a spring force, must be exercised. This has the advantage that when not operating the drive unit, the tool is automatically returned to the housing of the protection and guide device. In one embodiment, the protection and guide device is guided against a stop and predetermined by guiding the drive unit, the direction of the tool. In a particularly preferred example, the links formed as linear guides are arranged perpendicular to each other, so that either either the tool in one direction translationally or in the other direction can be moved translationally, as needed. Due to the fact that two translational degrees of freedom are provided, the tool can be positioned as desired within the plane defined by linkages (in this case linear guides).

Preferably, the scenes extend perpendicular to the corresponding outlet openings, wherein the outlet openings correspond almost to the side walls of the cuboid protective and guide device. The respective adjacent side walls form these outlet openings. Thus, for example, there is the possibility of first guiding the device along the one link (for example spatially horizontally) and subsequently guiding the device along the further link (for example spatially vertically). Furthermore, it is possible to guide the device simultaneously along the respective scenes, so that, for example, diagonally into an angle the tool can penetrate into the material to be processed.

The core idea of the invention is thus that, depending on requirements, the tool can be moved in any application so that it can at least partially escape at least at two mutually adjacent outlet openings of the preferably parallelepiped-shaped protective and guiding device.

In order to move the protective and guide device relative to the drive unit independently of the two given directions, it is provided to arrange the translationally arranged guide elements in the formation of scenes in two mutually different planes. For this purpose, the invention proposes to form the two levels like a slide and each to be provided with linear guides, which are arranged perpendicular to each other. Optionally, any position can be locked in one direction.

In a preferred embodiment, the protective and guiding means comprise side walls which are removable from the protective and guiding means. In this way, a quick tool change can be done.

In contrast to the prior art, the device according to the invention has a drive unit and a protective and guide device, wherein the drive unit comprises a motor having a drive spindle. The drive spindle can be coupled to the drive shaft of the tool, which is arranged within the protective and guide device. In the preferred embodiment, the drive spindle, the drive unit and the drive shaft of the protection and guide device are not coaxially. Preferably, these are optionally arranged with an offset in horizontal alignment and / or an offset in vertical alignment with each other. As a result, a better geometry and thus better handling of the inventive device, in particular with respect to the relative movements to be performed, can be achieved. So it is also possible to increase the offset depth of the tool from the device by the staggered arrangement.

Another significant advantage of the invention is that the user does not have to perform the relative movements by gripping the drive unit, comparable to the prior art. It is inventively provided that in the region of the wall of the protective and guide device, coupled with the drive unit, a special grip device is provided, which allows the inventive device to handle directly opposite to the cutting plane. This has considerable ergonomic advantages and in particular means that the tool can be guided in the defined directions easily and accurately and work safely.

A preferred embodiment of the housing device provides that the respective outlet openings are covered by flaps. These flaps open automatically as soon as the tool wants to emerge from the outlet opening. When not in use, the corresponding flaps offer a respective protection against injury and destruction of the tool.

A special embodiment provides that upon exit of the tool from the outlet openings, the respective position of the tool can be locked. This ensures that no additional force is required for further propulsion of the tool in only one direction, since working against the spring force caused by the safety device in the protective and guide device, eliminated. As soon as the inventive device is raised, the lock automatically releases, so that any regulations are taken into account by moving the tool back into the protective and guide device when lifting the device from a working surface. In a corresponding overrun the tool is thus completely surrounded by the housing device and not accessible to the user.

In order to prevent that chips, which are produced by machining with the tool, remain within the protective and guiding device, at least one suction device is provided opposite the respective outlet openings. The suction device is advantageously designed such that one known from the prior art Vacuum cleaner tube can be plugged in a simple manner. This can also remove the dust generated by the processing.

Another particular embodiment advantageously provides that the protective and guide device is provided with a flange, via which the drive unit can be coupled to the protective and guide device. Further, a rotational degree of freedom between the drive unit and the flange may be provided, which arbitrarily includes each angle. Locking in a defined position is also possible.

This has the advantage that on the one hand, the drive unit can be arranged at different angles to the protection and guide device, so that depending on the application, the arrangement can be made accordingly. In addition, it brings with it the further advantage that, depending on the application, different drive units, for example in different lengths or even in different performances, can be coupled to the protective and guide device.

According to the invention, it is further provided that the protective and guiding device or the device comprises a laser pointer. This offers the advantage that during processing the user can be shown the optimum cutting guidance, for example in the form of a processing line or in the form of a target point.

Compared to the prior art, the invention also has the advantage that the distance between the tool and a lateral stop, usually formed by the protective and guiding device, is extremely low. This makes it possible to perform the processing very close to the stop.

Further advantageous embodiments will become apparent from the following descriptions, the drawings and the claims.

Drawings:

Fig. 1

Eine erste perspektivische Ansicht auf das erfindungsgemässe Gerät zusammen mit der erfindungsgemässen Schutz- und Führungseinrichtung, jedoch ohne Abdeckplatte auf der Schutz- und Führungseinrichtung;

Fig. 2

eine weitere Ansicht des in Fig. 1 dargestellten erfinderischen Gerätes;

Fig. 3

eine Seitenansicht auf das erfindungsgemässe Gerät gemäss Fig. 1;

Fig. 4

eine Vorderansicht auf das erfindungsgemässe Gerät gemäss Fig. 1;

Fig. 5

eine Prinzipdarstellung zur Erläuterung der Relativbewegungen der Schutz- und Führungseinrichtung zu dem Werkzeug;

Fig. 6

eine schematische Darstellung der einer möglichen Anordnung des Werkzeugs relativ zur Schutz- und Führungseinrichtung;

Fig. 7

eine weitere schematische Darstellung der Anordnung des Werkzeugs relativ zu der Schutz- und Führungseinrichtung;

Fig. 8

eine dritte schematische Darstellung der Anordnung des Werkzeugs relativ zur Schutz- und Führungseinrichtung.

Show it:

Fig. 1

A first perspective view of the inventive device together with the inventive protection and guide device, but without cover plate on the protection and guide device;

Fig. 2

a further view of the inventive device shown in Figure 1;

Fig. 3

a side view of the inventive device according to FIG. 1;

Fig. 4

a front view of the device according to the invention according to FIG. 1;

Fig. 5

a schematic diagram for explaining the relative movements of the protective and guiding means to the tool;

Fig. 6

a schematic representation of a possible arrangement of the tool relative to the protective and guiding device;

Fig. 7

a further schematic representation of the arrangement of the tool relative to the protective and guiding device;

Fig. 8

a third schematic representation of the arrangement of the tool relative to the protective and guiding device.

Description of an embodiment

FIGS. 1 to 8 each show a protective and guide device 1 according to the invention as well as a device 2 according to the invention.

The protective and guide device 1 comprises a housing 3, which is formed substantially hollow and a cavity 4 shows. In the embodiment shown in Figure 1 the housing 3 is formed almost square and has - for better representation - at least only one side wall 5. At the end faces schematically outlet openings 6 and 7 are shown. Within the housing 3, a tool 8, here in the formation of a cutting disc, added. The bearing of the tool 8 via a drive shaft 9, wherein the drive shaft 9 is supported by means not shown in detail and is at least indirectly coupled to a drive unit 10. The drive unit 10 comprises, shown in Figure 4, a drive spindle 11. A holding element 17 is attached to the protective and guide device 1. Furthermore, the housing device 1 has a wide footprint SF. It serves to push the protective and guide device 1 with this footprint SF against a stop, such as a windowsill.

As shown in Figure 2, the drive unit 10 relative to the protective and guide device 1 in the direction of arrows 12 and the housing device 1 relative to the housing 3 in the direction of arrow 13, preferably via the support member 17 movable. In addition to the scenes shown in Figures 4 and 8 K ₁₂ , K ₁₃ provides a horizontal slide shown in Figure 2 14 and a vertical slide 15 for the corresponding relative movement between the drive unit 10 and the protection and guide device 1. The horizontal slide 14 is connected to the drive unit 10th coupled.

The drive unit 10 is flanged directly to the protective and guide device 1 in the embodiment shown here. It is also conceivable that a differently configured drive unit 10 or even a drive unit already known from the prior art, for example, a cutting disc machine is coupled.

Furthermore, the protective and guide device 1 has a suction device 16 to which a suction tube with an active suction can be connected directly.

The holding element 17 is at least indirectly arranged on the drive unit 10, so that in an ergonomic manner a relative movement in the direction of the arrow 12, 13 between the drive unit 10 and the protection and guide device 1 can be carried out.

The protective and guide device 1 itself has at its outlet openings 6, 7 each flaps, which, however, are not shown here in detail for reasons of representation. These flaps serve to prevent the tool 8 from being damaged or that the user is in any way injured by the tool 8, which may still be rotating.

In Figure 4 is coupled to the housing 3 via the backdrop K _{13 of} the vertical slide 15. The horizontal slide 14 is coupled to the vertical slide 15 via the guide K ₁₂ , the drive unit 10 being connected directly to the horizontal slide 14.

In the embodiment shown in Figure 4, the tool 8 only a small distance 19 to a processing surface, not shown. The distance 19 is approximately 5 mm. In the prior art, the distance is about 15 to 25 mm, so that the distance in the inventive device by about three to five times smaller.

In FIGS. 5 to 8, the principle of the relative movement between the housing device 1 and the drive unit 10 is explained.

In Figure 5, the drive spindle 11 of the drive unit 10 is shown to the drive shaft 9 of the tool 8 in an offset V ₁₂ in a horizontal orientation and an offset V ₁₃ in a vertical orientation. Thus there is no direct, but an indirect coupling. The tool 8 itself rotates due to the rotational movement of the drive shaft 9 or drive spindle 11 in the direction of arrow 18. The housing 3 has at its respective two end faces, which are arranged directly adjacent to each other, each outlet openings 6, 7.

functionality

In a first position of the vertical slide 15 of the protective and guide housing 1 along the scenes K _{13 of} the protective and guide housing 1, for example, moved by movement of the holding member 17 in the direction of arrow 13. In this case, the tool 8 comes out of the housing 3 by a corresponding distance from the outlet opening 6 out. The tool 8 can be guided in this direction of the arrow 13 until a maximum cutting depth S ₁₃ in the vertical direction has been reached (FIG. 6).

In a second position, the horizontal slide 14 along the scenes K _{12 of} the protective and guide housing, for example, by movement of the holding member 17 in the direction of arrow 12 moves. In this case, the tool 8 comes out of the housing 3 by a corresponding distance from the further outlet opening 7 out. The tool 8 can be guided in this direction of arrow 12 until a maximum cutting depth S ₁₂ in the horizontal direction has been reached (FIG. 7).

FIG. 8 shows an extreme position of the tool 8. The tool 8 can either take place from the position shown in FIG. 6 by movement of the holding element 17 in the direction of the arrow 13 or from the second position, as shown in FIG. 7, by movement of the holding element 17 in the direction of the arrow 12, without the actual protection and guide housing 1 is removed from its actual position. Thus, the tool 8 from its position in the protective and guide device 1 position (Figure 5) can be converted in different ways in a position that is characterized in that the tool 8 and its drive shaft 9 each position in a shown in Figure 8 Quadrant Q can take. It is not necessary that the sequence of movements is complied with. In the quadrant Q any position can be achieved by any method of the holding member 17 in the direction of arrow 12 and / or in the direction of arrow 13.

In Figure 8 it is seen that the maximum depth of cut S ₁₂ , S ₁₃ is reached exactly by the staggered arrangement of the drive shaft 9 to the drive spindle 11 shown in Figure 5, when the drive shaft 9 to the protective and guide device. 1 borders. In the case of a non-staggered arrangement of drive shaft 9 to drive spindle 11, the maximum depth of cut S ₁₂ , S ₁₃ by the outer dimensions of the drive unit 1, such as the housing shape, limited, with the result that in this case small depths of cut can be achieved.

Due to the inventive protection and guide device 1, it is possible that in a single operation both horizontally and vertically and a combination thereof, the tool 8 can be brought into use without a new arrangement of the entire device 2 is necessary.

LIST OF REFERENCE NUMBERS

1.

Protection and guidance device

Second

device

Third

casing

4th

cavity

5th

Side wall

6th

outlet opening

7th

outlet opening

8th.

Tool

9th

drive shaft

10th

drive unit

11th

drive spindle

12th

arrow

13th

arrow

14th

horizontal slide

15th

vertical slide

16th

suction

17th

retaining element

18th

arrow

19th

Distance to the working surface

Q

quadrant

K ₁₂

scenery

K ₁₃

scenery

S ₁₂

cutting depth

S ₁₃

cutting depth

V ₁₂

offset

V ₁₃

offset

SF

footprint

Claims (10)

Protective and guide device for mounting on a drive unit for separating and / or grinding materials, in particular for cutting out masonry built-in windows, doors and the like, consisting of - A substantially hollow housing for receiving a rotating tool in the formation of a cutting wheel, grinding wheel or the like, as well as a translational degree of freedom between the housing and the tool so that the tool is displaceably movable relative to the housing, and an outlet opening which is at least partially penetrable by the tool, characterized in that - At least one of the one degree of freedom independent further translational degree of freedom between the housing (1) and tool (8) is provided, and a further outlet opening (6, 7) for the tool (8) is provided in the protective and guide device (1), so that the tool (8) can penetrate both the one outlet opening (6) and / or the further outlet opening (7). Guard and guide device according to claim 1, characterized in that at least one rotational degree of freedom between protection and guide means (1) and tool (8) is provided. Protective and guiding device according to claim 1 or 2, characterized in that at least one degree of freedom can be fixed. Protective and guide device according to claim 1, characterized in that two mutually independent scenes (K ₁₂ , K ₁₃ ) are provided for the realization of the translational degrees of freedom, wherein the scenes (K ₁₂ , K ₁₃ ) are arranged perpendicular to each other. Guard and guide device according to claim 4, characterized in that the two scenes (K ₁₂ , K ₁₃ ) are arranged on different levels. Guard and guide device according to at least one of claims 4 or 5, characterized in that the scenes (K ₁₂ , K ₁₃ ) as a horizontal slide (14) or vertical slide (15) are formed. Guard and guide device according to at least one of the preceding claims, characterized in that the one outlet opening (6) is provided with a flap which is closed in the state in which the tool (8) does not penetrate an outlet opening (6). Guard and guide device according to at least one of the preceding claims, characterized in that the further outlet opening (7) is provided with a flap which is closed in the state in which the tool (8) does not penetrate an outlet opening (7). Apparatus for separating and / or grinding materials, in particular for separating windows, doors and the like installed in the masonry with a protective and guiding device consisting essentially of - A hollow housing for receiving a rotating tool in the formation of a cutting wheel, grinding wheel or the like, as well as a translational degree of freedom between the housing and the tool so that the tool is displaceably movable relative to the housing, and an outlet opening which is at least partially penetrable by the tool, and a drive unit which can be coupled at least indirectly to the tool,
characterized in that - At least one of the one degree of freedom independent translational degree of freedom between the housing (3) and tool (8) is provided, and a further outlet opening (6, 7) for the tool (8) is provided in the protective and guide device (1), so that the tool (8) can penetrate both the one outlet opening (6) and / or the further outlet opening (7). Apparatus according to claim 9, characterized in that it comprises a protective and guiding device (1) according to at least one of claims 2 to 8.

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