Hand-held tool for machining roof tiles

Abstract

The invention relates to a hand-held tool for machining roof tiles (1), comprising: a machining tool (4); a drive (7) for the machining tool (4); and a housing (2) having a handle (3), the machining tool (4) being connected to the housing (2) via a tool carrier (5). In order to allow both reliable and precise machining of a roof tile (1) without impairing the machining speed, it is proposed that a tool guide (8) be provided on the housing (2) and / or on the tool carrier (5), the tool guide being spaced apart from the machining tool (4) in the direction of a tool guide vertical axis (10) in order to span a receiving space (9), located between the machining tool (4) and the tool guide (8), for a roof tile (1).

Description

[0001] Hand tools for working with roof tiles

[0002] Technical area

[0003] The invention relates to a hand tool for machining roof tiles, comprising a cutting tool, a drive for the cutting tool and a housing comprising a handle, wherein the cutting tool is connected to the housing via a tool carrier.

[0004] State of the art

[0005] It is known from the prior art to machine roof tiles to create guides or recesses in the roof tile for support structures that can be mounted below the roof tiles on the roof frame. This allows the support structures to be mounted on the roof truss and guided to the roof surface through the guide or recess in the roof tile without compromising the secure fit of the roof tile. Photovoltaic systems can be mounted on the support structures.

[0006] CH712941A2 discloses a device for working on roof tiles using a rasp as a cutting tool. The device comprises a housing that forms a handle and in which a drive for the rasp is arranged. The rasp is connected to the housing via a tool carrier. Since the rasp has a working area on both of its opposite surfaces, both the underside and the top side of a roof tile can be easily worked on without having to turn the roof tile. While the top side of the roof tile can be easily worked on using the device due to its accessibility, to work on the underside of the roof tile it is sufficient to fix the roof tile in a position raised on one side and to work on it with the side of the tool facing the underside of the roof tile.The disadvantage, however, is that the limited accessibility to the underside of the roof tile makes precise processing difficult. Furthermore, mobile hand tools, especially those that allow for processing roof tiles on the roof, pose a hazard to the operator, for example, due to flying sparks or splinters.

[0007] AT13468U1 and DE202013002407U1 disclose stationary devices for processing roof tiles.

[0008] Description of the invention

[0009] The invention is therefore based on the object of proposing a device for processing roof tiles of the type described above, which enables both safe and precise processing of a roof tile without impairing the processing speed.

[0010] The invention achieves this objective by providing a tool guide on the housing and / or on the tool carrier, which is spaced apart from the cutting tool in the direction of a tool guide vertical axis for clamping a receiving space for a roof tile arranged between the cutting tool and the tool guide. Due to the features of the invention, the tile can be gradually introduced into the preferably component-free receiving space between the cutting tool and the tool guide during machining and used to guide the cutting tool. This allows the operator to support the device against the roof tile via the tool guide, and uncontrolled movements of the cutting tool during machining of the roof tile can be reduced.In this way, precise and rapid machining conditions are achieved even when the roof tile is only lifted on one side for reasons of time and the associated limited accessibility. At the same time, the tool guide can act as a shield against any splinters or sparks that may arise during machining, particularly when the tool guide covers the machining tool. For this purpose, the tool guide can be arranged on the top and / or bottom of the machining tool. The tool guide can be supported on the housing or on the tool carrier itself. Particularly stable conditions are achieved when the tool guide is supported on both the housing and the tool carrier. The device is preferably designed as a portable device, in particular as a hand-held tool. In this way, regardless of the design of the machining tool orDepending on the arrangement of the tool guide, both sides of the roof tile can be machined by rotating the device around its longitudinal axis. The tool guide can therefore be positioned on the underside or the top side of the roof tile, depending on the tool orientation. An electric motor located in the housing is preferably used as the drive for the cutting tool. For ergonomic and safe machining, the cutting tool can be spaced from the housing along a longitudinal axis. A compact device is achieved by arranging the drive for the cutting tool in the housing and / or in the tool carrier.

[0011] In order to enable precise machining regardless of the type of roof tile, it is proposed that the height of the receiving space, i.e. the distance between the cutting tool and the tool guide, be adjustable. In this way, the device can be adapted to different roof tile thicknesses or roof tile properties and a safe introduction of the roof tiles into the receiving space is enabled. Simple design conditions arise if the tool guide is height-adjustable in the direction of the tool guide vertical axis. This can be achieved via fixable vertical guides. The tool guide vertical axis is understood to be a vertical axis running in a coordinate system fixed to the tool guide. Accordingly, if the device including the tool guide is pivoted, the imaginary

[0012] Coordinate system and thus the imaginary tool guide vertical axis.

[0013] While it is conceivable to use guide rollers or similar tools as a tool guide, particularly advantageous conditions in terms of shielding effect and machining accuracy are achieved when the tool guide is a slide rail with a flat guide section. This creates a sufficiently high friction force between the flat guide section and the roof tile, preventing unwanted movement of the device during machining. Furthermore, the full-surface slide rail, in particular, provides particularly reliable shielding against sparks and splinters.

[0014] To protect not only the user but also the drive from possible contamination, it is proposed that a drive mechanism be provided in the tool carrier to connect the drive to the cutting tool. In this way, the tool carrier can serve as a protective housing for the drive mechanism. Drive belts, for example, are suitable as drive mechanisms, as they can be easily adapted to any shape of the tool carrier using appropriate guides.

[0015] In order to improve the accessibility of the device to the underside of the roof tile without having to lift it excessively high and without the user having to perform unnatural movements, the tool carrier can be formed by an angular connecting arm, in particular by two angular connecting arms which hold the cutting tool between them. The angular design allows the user's hand to remain in an ergonomic position above the angled roof tile while machining the underside of the roof tile. At the same time, the angular shape of the connecting arm distances the user's hand from the machining surface when machining the top side of the roof tile, thus protecting it.The angular connecting arms can extend parallel to each other with respect to a housing longitudinal axis and can be spaced apart along a tool guide transverse axis (which runs transversely to the housing longitudinal axis and transversely to the tool guide vertical axis). The drive means for drivingly connecting the drive to the cutting tool can extend in at least one angular connecting arm.

[0016] In principle, various machining heads, such as multi- or single-milling heads or vibratory saws, can be used as cutting tools. This is because both sides of the roof tile can be precisely machined by rotating the device around its longitudinal axis and positioning the tool guide either on the underside or on the top side of the roof tile. However, particularly fast and reliable machining conditions are achieved when the cutting tool is designed to rotate around a rotational axis running parallel to the transverse axis of the tool guide. This creates a machining area of ​​the tool both on the side of the cutting tool facing the tool guide and on the side facing away from the tool guide.As a result, rotation of the device about its longitudinal axis is not necessary to machine both sides of the roof tile, since the upper side of the roof tile can first be machined by the machining area of ​​the cutting tool facing away from the tool guide. After this, the roof tile can be lifted on one side and the underside of the roof tile can be machined by the machining area of ​​the cutting tool facing the tool guide by inserting the same into the receiving space between the tool guide and the side of the tool facing the tool guide. For the purposes of the invention, the machining area is that area of ​​the cutting tool that comes into contact with the roof tile and machines it. A grinding belt or a milling head, for example, can be used as a cutting tool with a rotation axis running parallel to the transverse axis of the tool guide.In order to be able to create precise machining conditions on both sides of the roof tile, particularly in an embodiment with a tool with a rotation axis running parallel to the transverse axis of the tool guide, it is proposed that a support guide be provided in the area of ​​the side of the cutting tool facing away from the tool guide. This support guide, similar to the tool guide, enables the device to be supported even when the roof tile is not inserted into the receiving space, for example, when machining the top side of the roof tile. The support guide is preferably arranged on the housing and / or on the tool carrier.In particular, if the support guide is bowl-shaped and positioned upstream of the cutting tool in the tool feed direction, the support guide can also serve as a collecting tray for splinters that are generated during machining and are thrown against the feed direction, further promoting clean and precise work. A particularly large amount of dirt can be collected if the support guide is positioned between the housing and the cutting tool in the tool feed direction. The support guide can be designed to be height-adjustable along the vertical axis of the tool guide to allow adaptation to different roof tile types.

[0017] To enable extended operation of the device, a battery holder for powering the electrically operated drive can be provided on the side of the housing facing away from the tool. Interchangeable batteries allow for long-term use.

[0018] To further improve ergonomic working, it is proposed that a support handle be arranged near the tool holder's attachment point on the housing. This facilitates two-handed machining and promotes steady tool guidance. The support handle is preferably located on the side of the housing facing away from the cutting tool.

[0019] Brief description of the invention The drawing shows an example of the subject matter of the invention.

[0020] Fig. 1 is a perspective view of a first embodiment of the device according to the invention, wherein an upper side of a roof tile is processed,

[0021] Fig. 2 is a section along the line ll-ll of Fig. 1 in side view and on the same scale,

[0022] Fig. 3 is a partially sectioned side view of the first embodiment shown in Fig. 1, wherein an underside of a roof tile is machined,

[0023] Fig.4 a roof tile arrangement with a support structure for photovoltaic systems mounted on a roof truss and

[0024] Fig. 5a-c a second, third and fourth embodiment of a cutting tool according to the invention.

[0025] Ways to implement the invention

[0026] A device according to the invention for processing roof tiles 1 is shown, for example, in Fig. 1 and has a housing 2 which forms a handle 3 for a user and to which a tool carrier 5 having a cutting tool 4 is attached. The tool carrier 5 can be formed by two angular connecting arms 6 running parallel to one another, which hold the cutting tool 4 between them. The cutting tool 4 can be driven by a drive 7 installed in the housing 2, as indicated in Fig. 2. According to the invention, a tool guide 8 is provided which, as shown in the illustrated embodiments, can be arranged on the housing 2.The tool guide 8 is spaced from the cutting tool 4 in the direction of a stationary tool guide vertical axis 10 (Figs. 2 and 3) for clamping a receiving space 9 for a roof tile 1, which is arranged between the cutting tool 4 and the tool guide 8. The receiving space 9 thus serves to receive and insert the roof tile 1 and is designed, in particular, to be free of internal components, as illustrated in Fig. 3. In this way, precise machining of the underside of a roof tile 1 can be carried out. Alternatively or additionally, in an embodiment not shown, the tool guide 8 can be arranged on the tool carrier 5.

[0027] With the device according to the invention, in particular, roof tile overhangs 11 of roof tiles 1 can be removed on both sides or provided with recesses 12, as indicated in Figs. 1-3 and in particular in Fig. 4. In this way, support structures 14 mounted on a roof truss 13 can be guided through the recesses 12 to the roof surface. Photovoltaic systems can be mounted on the support structures 14.

[0028] To enable roof tiles 1 of different designs to be processed precisely, the receiving space 9 can be designed to be height-adjustable. This can be achieved by adjusting the height of the tool guide 8 in the direction of the tool guide vertical axis 10 via vertical guides 15 shown in Fig. 1 and securing it via screws 16.

[0029] A structurally simple and at the same time safe tool guidance is obtained if it is designed as a slide rail 17 with a flat guide section 18, as is illustrated by way of example in Fig. 2.

[0030] To protect the drive from contamination, drive means 19, for example a drive belt, for connecting the drive 7 to the cutting tool 4 can run in the tool carrier 5, particularly in the connecting arms 6. The drive belt can be deflected via rollers 20.

[0031] In order to precisely machine both sides of the roof tile 1 without having to rotate the device about its longitudinal axis, the cutting tool 4 can be designed to rotate about a rotation axis running parallel to the tool guide's transverse axis 21. The cutting tool can be a milling head, for example. This results in a machining area 22 of the cutting tool 4 facing the tool guide and a machining area 23 facing away from the tool guide, so that the top side of the roof tile 1 (Figs. 1 and 2) and the underside of the roof tile 1 (Fig. 3) can be machined easily.

[0032] In the area of ​​the side of the cutting tool 4 facing away from the tool guide, in particular upstream of the cutting tool 4 as seen in the tool feed direction V, a support guide 24 can be provided, which particularly facilitates the machining of the upper side of the roof tile 1. The support guide 24 can be bowl-shaped, whereby it can serve as a receptacle for removed roof tile material.

[0033] Figs. 5a-5c show alternative embodiments of the cutting tool. Fig. 5a shows a multi-milling head 25, whose rotational axes run parallel to the tool guide vertical axis 10. Fig. 5b shows a single-milling head 26, whose rotational axis runs parallel to the tool guide vertical axis 10. Fig. 5c shows a vibration saw 27.

[0034] In all embodiments, a support handle 28 for a second hand can be arranged in the area of ​​the attachment of the tool carrier 5 to the housing 2.

[0035] Fig. 1 illustrates that a battery holder 29 for supplying the electrically designed drive 7 can be provided on the side of the housing 2 facing away from the tool.

Claims

Patent claims 1. Hand tool for machining roof tiles (1) with a cutting tool (4), with a drive (7) for the cutting tool (4) and with a housing (2) comprising a handle (3), wherein the cutting tool (4) is connected to the housing (2) via a tool carrier (5), characterized in that a tool guide (8) is provided on the housing (2) and / or on the tool carrier (5), which is spaced from the cutting tool (4) in the direction of a tool guide vertical axis (10) for clamping a receiving space (9) for a roof tile (1) arranged between the cutting tool (4) and the tool guide (8).

2. Device according to claim 1, characterized in that the height of the receiving space (9) is adjustable.

3. Device according to claim 1 or 2, characterized in that the tool guide (8) is height-adjustable in the direction of the tool guide vertical axis (10).

4. Device according to one of claims 1 to 3, characterized in that the tool guide (8) is a slide rail (17) having a flat guide section (18).

5. Device according to one of claims 1 to 4, characterized in that a drive means (19) for drivingly connecting the drive (7) to the cutting tool (4) is provided in the tool carrier (5).

6. Device according to one of claims 1 to 5, characterized in that the tool carrier (5) is formed by an angular connecting arm (6), in particular by two angular connecting arms (6) which receive the cutting tool (4) between them.

7. Device according to one of claims 1 to 6, characterized in that the cutting tool (4) is designed to rotate about a rotation axis running parallel to the tool guide transverse axis (21).

8. Device according to one of claims 1 to 7, characterized in that a support guide (24) is provided in the region of the side of the cutting tool (4) facing away from the tool guide.

9. Device according to claim 8, characterized in that the support guide (24), in particular in the form of a shell, is arranged upstream of the cutting tool (4) as seen in the tool feed direction (V).

10. Device according to one of claims 1 to 9, characterized in that a battery holder (29) for supplying the electrically designed drive (7) is provided on the side of the housing (2) facing away from the tool.

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