WO2002060642A1

WO2002060642A1 - Guiding device for a manual machine tool, especially for a manual circular saw

Info

Publication number: WO2002060642A1
Application number: PCT/DE2001/004663
Authority: WO
Inventors: Guillermo Havenstein; Ernst Dreher; Adolf Zaiser; Steffen Weber
Original assignee: Robert Bosch Gmbh
Priority date: 2001-01-30
Filing date: 2001-12-12
Publication date: 2002-08-08
Also published as: DE20101525U1

Abstract

The invention relates to a guiding device comprising a carrier unit (10) for fixing a guiding unit (14) to a manual machine tool (12), especially a manual circular saw, and comprising a guiding element (16), especially a guiding rail, on which the manual machine tool (12) can be guided by means of the guiding unit (14). According to the invention, the carrier unit (10) comprises an individual, at least partially rod-shaped carrier element (20) which extends essentially perpendicularly in relation to a machining direction (18). The guiding device (14) can be fixed to the manual machine tool (12) by means of said carrier element.

Description

Guide device for a hand machine tool, in particular for a hand-held circular saw

State of the art

The invention relates to a guide device for a hand tool, in particular for a hand-held circular saw, according to the preamble of claim 1.

A generic hand-held circular saw with a base plate is known from the document EP 0437 753 A2. A guiding device is used to grant straight cuts. The guide device has a guide ruler that can be placed on an object to be machined and on which a guide rib is formed. A guide shoe is attached to the base plate of the circular saw with a guide groove, via which the circular saw can be guided on the guide rib of the guide ruler.

The guide shoe is connected to the base plate via an adjustment plate and a console. The adjustment plate has two guide pins that are slidable in guide the holes in the console. By actuating a lever, the guide shoe can be moved transversely to a saw blade of the hand-held circular saw, guided by the guide bolts in the guide holes, to the base plate. The setting plate has slots running transversely to the saw blade, into which screws connected to the guide shoe engage and via which the position of the setting plate relative to the base plate can be fixed.

Furthermore, a separate sliding shoe with a guide groove is known from DE 43 22 303 AI. The separate slide shoe can be mounted on a base plate of a hand machine tool. The handheld power tool can be placed on a guide rib of a guide rail with the guide groove of the slide shoe, and the handheld power tool, in particular a hand-held circular saw, can be pushed over a workpiece in a guided manner.

Advantages of the invention

The invention is based on a guide device with a carrier unit for fastening a guide unit to a handheld power tool, in particular on a circular saw, and with a guide element, in particular a guide rail, on which the handheld power tool can be guided via the guide unit.

It is proposed that the carrier unit have a single, at least partially rod-shaped carrier element which runs essentially transversely to a machining direction and via which the guide unit is attached to the hand-held power tool. is fixable. A rip fence guide available for an angular stop can advantageously be used for mounting the guide unit on the hand machine tool. Additional guides or fastening elements for the guide unit and the associated structural expenditure and costs can be avoided. Furthermore, the guide unit in particular can be mounted on the handheld power tool irrespective of the size and length.

If the carrier element is made in one piece, the production can be carried out particularly inexpensively in one machining operation, e.g. manufactured in one punching process and components can be saved. It is also conceivable to design the guide unit and the carrier element in one piece.

It is advantageous if the carrier element is T-shaped and in particular is formed by a flat bar. A stable and, in particular, precisely angular support element can be achieved inexpensively, for example in a stamping process. The carrier element can be formed from different materials, for example from a plastic, etc. However, the carrier element is advantageously made of a stable metal, such as a steel sheet. The guide unit can be designed in various forms which appear useful to the person skilled in the art. For example, the guide unit can be formed by a plate with a groove or advantageously by a U-profile, as a result of which it can be made particularly light, inexpensive and space-saving. Furthermore, comfortable handling can be achieved with a guide unit designed as a U-profile. In a further embodiment of the invention, at least part of the carrier element is at least partially sunk in the guide unit. The carrier part and the guide unit can advantageously be positively connected to one another and can be operatively connected in a stable and exact manner.

If the carrier element is firmly connected to the guide unit via at least one rivet, an inexpensive and simple assembly and a stable and exact connection can be achieved. In principle, however, other positive, non-positive and / or integral connections are also conceivable, such as welded connections, clamped connections, snap-in connections, etc.

If at least part of the guide unit and advantageously the entire guide unit are made of plastic, a light, inexpensive and stable guide unit with good sliding properties can be achieved. In an injection molding process, other functional elements can be easily, in particular

Spring elements to be molded. Additional components, assembly effort and costs can be saved. However, it is also possible for the guide unit to be formed from a different material, such as, for example, from a formed sheet metal, to which functional elements can also be molded.

With a spring element on the guide unit, play-free and smooth-running sliding of the guide unit on the guide element can be made possible. In a further embodiment of the invention it is proposed that at least one Spring element is arranged on a side of the guide unit which is not loaded by an operating pressure. A load on the spring elements by the operating pressure can be avoided and play-free guidance can be achieved with spring elements each with an advantageously low spring force.

The position of the spring elements can vary depending on the contour of the guide unit and the contour of the guide element corresponding to the guide unit. In the case of a guide groove integrally formed on the guide unit, which can be guided on a guide rib formed on the guide element, the spring elements are advantageously arranged on an inside of the guide groove of the guide unit on a side of the guide rib facing away from the handheld power tool. If, on the other hand, a guide rib is formed on the guide unit and can be guided in a guide groove formed on the guide element, the spring elements are advantageously arranged on an outside of the guide rib facing the handheld power tool. In principle, however, it is also conceivable that one or more spring elements are provided on the guide element.

A part of the guide unit advantageously leads in the machining direction of the hand machine tool. The guide unit can already be operatively connected to the guide element before the start of a cutting process and the hand tool can be safely guided at the start of the cutting process.

If a marking is arranged on the carrier element for setting the cutting position, a simple, quick and flexible adaptation to a guide element can be achieved. The marking can be used for a manual setting and / or for an at least partially automated setting. For example, a position of the marking relative to a guide element can be detected with a sensor unit and the guide unit and / or the hand-held power tool can be adjusted accordingly with an adjusting device.

If the position of the marking is adjustable, the guide device can advantageously be flexibly adapted to different guide elements. The constructive design of the adjustable marking can be carried out in various variants which appear sensible to a person skilled in the art, such as with a thin, stretchable or snap-in sheet, etc.

drawing

Further advantages result from the following description of the drawings. Exemplary embodiments of the invention are shown in the drawings. The drawings, the descriptions and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.

Show it: 1 is a schematic circular saw shown obliquely from above with a guide device according to the invention,

2 is a plan view of a carrier element with a guide unit,

3 shows a section along the line III-III in FIG. 2 in an enlarged view,

Fig. 4 shows a section through an alternative carrier element with a displaceable marking and

5 shows a view of the guide unit from FIG. 2 from below.

Description of the embodiments

In Fig.l a circular saw 12 is shown with a base plate 30 and a guide device according to the invention. The guide device has a carrier unit 10 for fastening a guide unit 14 to the hand-held circular saw 12. Furthermore, the guide device has a guide element 16 designed as a guide rail, on which the hand-held circular saw 12 can be guided over a guide rib 32 via the guide unit 14.

The carrier unit 10 has a one-piece, T-shaped carrier element 20 with a rod-shaped longitudinal bar 34 and a rod-shaped cross bar 35. The carrier element 20 is punched out of a steel sheet (FIGS. 1 and 2).

The guide unit 14 is formed from a plastic U-profile (FIG. 3). An indentation 40 is formed on an outer side of a base part 38 of the U-profile, in which the crossbar 36 of the T-shaped support element 20 is sunk. The crossbar 36 closes flat on the cover side 42 with a collar 44 surrounding the indentation 40. In the area of the longitudinal beam 34 of the T-shaped support element 20, a recess 46 is made in the collar 44, through which the longitudinal beam 34 is guided in a form-fitting manner in the longitudinal direction of the transverse beam 36 (FIGS. 2 and 3).

In the direction of its free end, the longitudinal bar 34 is deflected by 90 ° in the direction of an open side of the guide unit 14 designed as a U-shaped profile immediately after the collar 44 or the recess 46 in a first deflection 48 and runs essentially parallel to one of the free end of the longitudinal bar 34 facing leg 50 of the U-profile (Fig. 3). Shortly before the end of the leg 50 of the U-profile, the longitudinal beam 34 is deflected by 90 ° in a second deflection 102 opposite the first deflection 48 and runs parallel to a plane spanned by the bottom part 38 of the U-profile up to its free end ,

The transverse bar 36 of the carrier element 20, which is countersunk in the guide unit 14, is firmly connected to the guide unit 14 via three rivets 22 (FIGS. 2 and 3). Spring elements 24 are molded onto the guide unit 14 on an inner side 52 of a leg 54 of the U-profile facing away from the free end of the longitudinal beam 34 (FIGS. 2 and 3). The inside 52 with the spring elements 24 is a side 26 of the guide unit that is not loaded by an operating pressure

14. On an opposite inner side 56 of the leg 50 of the U-profile facing the free end of the longitudinal beam 34, guide lugs 58 are formed at the same height of the spring elements, which enable advantageous punctual guidance (FIG. 5).

A rip fence guide 60, which has guide elements 62 and a locking screw 64, is formed on the base plate 30 against a machining direction 18 in front of the circular saw 12. In the rip fence 60, the

Longitudinal bars 34 of the carrier element 20 are pushed in transversely to the machining direction 18, their position is adjusted steplessly and then locked with the locking screw 64. The guide unit 14 can be guided with the open side of the U-profile without play on the guide rib 32 of the guide element 16 (FIG. 1).

In principle, it is also conceivable to arrange a carrier element 20 with a guide unit 14 against the machining direction 18 after the circular saw 12, which can take over the guidance either alone or together with a carrier element 20 and a guide unit 14 arranged in front of the circular saw 12 counter to the machining direction 18.

The longitudinal bar 34 of the support member 20 divides the rod-shaped cross bar 36 and the rivets 22 with the Crossbar 36 connected guide unit 14 into a long and a short leg 66, 68 (Fig. 1, 3). The long leg 66 protrudes beyond the base plate 30 in the machining direction 18 and leads the hand-held circular saw 12 and the base plate 30 (FIG. 1).

On a cover side 70 of the longitudinal beam 34 of the carrier element 20, a marking 28 designed as a notch is introduced (FIGS. 1, 2 and 3). A first and a second recess 72, 74 are provided on the base plate 30. The first recess 72 indicates a cutting position with a vertical alignment of a saw blade 76 to the base plate 30. The second recess 74 indicates a cutting position of the saw blade 76 when the saw blade 76 is aligned with the base plate 30 by 45 °. In order to align the cutting position with a rubber lip 78 arranged on the guide element 16 when the saw blade 76 is oriented perpendicularly to the base plate 30, the marking 28 is brought into alignment with the first recess 72. In order to align the cutting position with the rubber lip 78 arranged on the guide element 16 when the saw blade 76 is aligned with the base plate 30 by 45 °, the marking 28 is brought into alignment with the second recess 74 (FIG. 1).

Fig. 4 shows a section of a guide device with an alternative marking, which is adjustable in its position. A carrier element 80 has a recess 84 on its cover side 82, which has a smaller width in an area 86 facing the cover side 82 than an area 88 facing away from the cover side 82, so that the a guide surface 90 forms between the areas 86, 88.

In the wider area 88, a sheet 92 is arranged with a marking made on its top side 94. The sheet

92 is guided on the guide surface 90 in the longitudinal direction of a longitudinal bar 96 of the T-shaped carrier element 80. A bore 98 with a thread is made in the sheet 92, through which a fastening screw 100 is rotated. By screwing the fastening screw 100 into the thread, the sheet 92 can be clamped in the recess 84 or pressed against the guide surface 90 and fixed. In order to move the sheet 92 with the marking, specifically in order to adapt the guide device ^" to a specific guide element, the fastening screw 100 is unscrewed from the thread. The pressing force of the sheet 92 on the guide surface 90 is reduced, and the sheet 92 can be shifted in its position in the longitudinal direction of the longitudinal beam 96 and positioned accordingly.

reference numeral

10 carrier unit 54 legs

12 hand tool 56 inside

14 Guide unit 58 guide nose

16 Guide element 60 Rip fence guide

18 Machining direction 62 guide _{element ι}

20 support element 64 locking screw

22 rivets 66 legs

24 spring element 68 legs

26 Unloaded side 70 Deck side

28 marking 72 recess

30 base plate 74 recess

32 guide rib 76 saw blade

34 longitudinal beams 78 rubber lip

36 crossbeams 80 support element 38 base part 82 top side 40 indentation 84 recess 42 top side 86 area

44 fret 88 area

46 recess 90 guide surface

48 deflection 92 sheet

50 legs 94 top side

52 inside 96 longitudinal beams 98 hole

100 fastening screw

102 diversion

Claims

Expectations

1. Guide device with a carrier unit (10) for fastening a guide unit (14) to a hand-held power tool (12), in particular on a hand-held circular saw, and with a guide element (16), in particular a guide rail, on which the hand-held power tool (12) via the guide unit (14) can be guided, characterized in that the carrier unit (10) has a single, at least partially rod-shaped carrier element (20, 80) running essentially transversely to a machining direction (18), via which the guide unit (14) the hand tool (12) can be fastened.

2. Guide device according to claim 1, characterized in that the carrier element (20, 80) is made in one piece.

3. Guide device according to one of the preceding claims, characterized in that the carrier element (20, 80) is T-shaped.

, Guide device according to one of the preceding claims, characterized in that the carrier element (20, 80) is formed by a flat bar.

5. Guide device according to one of the preceding claims, characterized in that at least a part (36) of the carrier element (20, 80) is at least partially sunk in the guide unit (14).

6. Guide device according to one of the preceding claims, characterized in that the carrier element (20, 80) via at least one rivet (22) with the guide unit (14) is fixedly connected.

7. Guide device according to one of the preceding claims, characterized in that at least part of the guide unit (14) is made of plastic.

8. Guide device according to one of the preceding claims, characterized in that the guide unit

(14) at least one spring element (24) is molded on.

9. Guide device according to claim 8, characterized in that at least one spring element (24) is arranged on a side (26) of the guide unit (14) which is not loaded by an operating pressure.

10. Guide device according to one of the preceding claims, characterized in that at least part of the guide unit (14) in the machining direction (18) of the hand tool (12) hurries ahead.

11. Guide device according to one of the preceding claims, characterized in that at least one marking (28) is arranged on the carrier element (20, 80) for setting a cutting position.

12. Guide device according to claim 11, characterized in that the marking is made adjustable in its position.