DE9204693U1 - Tool stands, especially for stone drills and stone saws - Google Patents

Description

Stone saws

The invention relates to a tool stand, in particular for stone drills, with at least one base, at least one guide bar connected to the base and a sliding carriage that can be moved on the at least one guide bar.

Tool stands are used for drilling and sawing in concrete or stone, which are anchored to the concrete or stone with their base. A guide bar is attached to the base, on which a sliding carriage is slidably mounted. The guide bar is provided with a rack with which a gear meshes, which is rotatably mounted on the sliding carriage. The gear can be driven manually or by a motor. By turning the gear, the sliding carriage moves relative to the

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Accounts:

Sa!. Oppenheim jr & Cie., Cologne (bank code 37030200) Account no. 10760 Deutsche Bank AG, Cologne (bank code 370 70060) Account no. 1165018 P^stgiro Cologne (bank code 370100 50) Account no. 654-500

Guide beam, with the result that the drilling or sawing machine attached to the sliding carriage can be moved.

The forces acting on the sliding carriage, the guide bar and the base of the tool stand when drilling and sawing are extremely different. This is why the tool stands previously used for drilling and sawing also differ in their construction, with the guide bars of the stone drilling tool stands being significantly more stable than those used for sawing. So far there are tool stands for stone drills as well as tool stands for stone saws. These systems cannot be expanded and are not compatible with one another.

The invention is based on the object of creating a tool stand, in particular for stone drills or stone saws, which can be used equally for drilling and sawing concrete or stone and which can be expanded in terms of its area of application, in particular by attaching a wide variety of tool designs.

To solve this problem, the invention proposes a tool stand of the type mentioned at the beginning, which is further characterized in that the guide bar has two guide profiles that are spaced apart from one another and parallel to one another, against which sliding pieces of the sliding carriage slide, that the sliding carriage has at least two spaced apart sliding pieces per guide profile and is held in place with the sliding pieces against the guide profiles and secured against tilting relative to the guide bar, and that the guide bar has two

has clamping profiles spaced apart and parallel to one another for clamping the guide bar to a mounting device of the base and/or a tool.

The tool stand according to the invention has a guide beam with two guide profiles that are spaced apart from one another and parallel to one another. The guide profiles preferably protrude from one and the same side of the guide beam and guide the slide carriage via sliding pieces arranged on it. The slide carriage has at least two spaced apart sliding pieces per guide rail; the slide carriage is therefore mounted on the guide beam via four sliding bearings arranged in one and the same plane. Furthermore, the slide carriage is removably secured to the guide beam. In addition to the guide profiles, the guide beam also has two parallel clamping profiles to which a holding device can be clamped. The guide beam can be fixed to the base via the clamping profiles. To further hold the guide beam on the base, a tension strut that can be subjected to tensile stress is advantageously arranged between them, which engages the end of the guide beam facing away from the base.

A feature of the guide bar of the tool stand according to the invention is that the guide bar can be attached on its rear side via the clamping profiles to a mounting device that is mechanically coupled to a sliding carriage, which in turn is slidably mounted on another guide bar. This makes it possible to produce tool stands with several relatively movable (rotatable, swiveling and adjustable)

sliding) guide beams are put together to obtain a tool stand that is adapted to the respective needs in relation to the stone to be worked. In this way, a modular tool stand is created. The basic construction of the tool stand with base and at least one guide beam protruding from it is always retained; this basic tool stand construction can be attached. Additional units, for example a stone drill or a stone saw, coupling elements for connecting two guide beams, etc. can be attached to the guide beam(s) of the tool stand according to the invention via both the clamping profiles and the guide profiles. The tool stand according to the invention can therefore be used in a variety of ways.

In an advantageous development of the invention, at least two guide beams that can be moved relative to one another are provided, each with at least one sliding carriage, the two guide beams being mechanically coupled to one another via an intermediate piece between the two sliding carriages. The intermediate piece can be designed as a rigid connection or as a swivel joint. In this way, for example, a tool stand can be created, on whose guide beam connected to the base a first sliding carriage is arranged, which is connected to a second sliding carriage via an intermediate piece designed as a swivel joint. The second sliding carriage is slidably mounted on the guide profiles of a second guide beam. The mounting device of a stone saw can be attached to this second guide beam, namely at one of the two ends of the second guide beam. The stone saw can thus be moved relative to the first guide beam by

Rotate 360° and also move lengthways. A tool stand constructed in this way is also suitable for deep hole sawing.

According to an advantageous development of the invention, the guide beam(s) of the tool stand according to the invention have a one-piece beam core on which the guide profiles and the clamping profiles are formed in one piece. The guide profiles are arranged on a common side of the beam core. The two guide profiles preferably protrude from the beam core and are V-shaped in cross-section. The two V-shaped recesses are aligned parallel to each other. The sliding pieces of the sliding carriage run or slide in the V-shaped recesses. The sliding pieces, whose shape corresponds to the negative shape of the V-shaped recesses of the guide profiles, prevent the sliding carriage from moving transversely to the direction of displacement.

As already mentioned above, the sliding carriage is mounted on the guide beam in a removable manner. With sliding pieces immersed in the V-shaped recesses, the sliding carriage can be secured to the guide beam against accidental removal. For this purpose, the sliding carriage has sliding bodies in addition to the sliding pieces, preferably in the form of rotatably mounted rollers. These rollers grip the two opposite outer legs of the V-shaped guide profiles from the side. In this design of the guide beam, the outer legs of the guide profiles are laterally above the beam core, so that the sliding pieces rest on one side surface of the outer legs and the sliding bodies rest on the other (outer) surface of the outer legs. The two surfaces

The outer legs advantageously run parallel to each other. By moving the sliding bodies away from the outer legs, the sliding carriage can be removed from the guide bar.

Just as the guide profiles protrude from the sides and front of the beam core, the two clamping profiles also protrude from the beam core. This means that the clamping profiles are free and can be gripped laterally by the clamping elements of the mounting device, thus clamping the guide beam in place.

The beam core preferably has a substantially rectangular structure, along whose four edges the guide and clamping profiles run. The entire guide beam is advantageously an extruded profile made of light metal, which has internal cavities and internal struts. The guide beam is also provided with these longitudinal cavities in the area of the guide and hollow profiles. The internal struts give the hollow profile of the guide beam maximum rigidity in terms of deflection and torsion with minimal weight. These properties are advantageous when a tool stand is assembled with several guide beams that can rotate and slide against each other.

Exemplary embodiments of the invention are explained in more detail below using the figures. In detail:

Figs. 1 and 2

a first embodiment of a tool

Stand for a core drill with a single guide bar attached to a base in side view and top view,

Fig. 3 is a view of the tool stand cut along the plane III-III of Fig. 1,

Fig. 4 and 5

a second embodiment of a tool stand with double guide beams and another movable guide beam holding a stone saw in side view and top view,

Fig. 6 a front view of the tool stand according to Fig. 4 in the direction of arrow VI with the stone saw rotated relative to the double guide bar construction and

Fig. 7 shows a further embodiment of a tool stand with two bases each carrying a vertical guide beam and a horizontal guide beam slidably held on these vertical guide beams, which in turn carries a slidable guide beam with a stone saw attached to it.

In Figs. 1 and 2, a first embodiment of a tool stand for a core stone drill is shown in side view and top view. The tool stand 10 has a frame-like base 12 made of light metal, which rests on the floor 16 via feet 14 and is anchored there. The base 12 carries a vertical guide beam 18, which with its lower end facing the floor 16 fits into a recess 20 in the base 12.

is immersed and is clamped there. A support strut 24 is arranged between the upper end 22 of the vertical guide beam 18 and the rear end of the base 12 facing away from the guide beam 18. On the front side 26 facing away from the support strut 24, the vertical guide beam 18 carries a sliding carriage 28. The sliding carriage 28 is held on the vertical guide beam 18 on its front side 26 so that it can slide. By manually turning a hand crank 30 on the sliding carriage 28, a gear 29 rotatably mounted on the sliding carriage 28 can be set in rotation by hand, which meshes with a rack 31. The rack 31 is attached to the front side 26 of the vertical guide beam 18 (see Fig. 3). When the hand crank 30 is turned, the sliding carriage 28 can be moved relative to the vertical guide bar 18. By locking the hand crank 30, the sliding carriage 28 is fixed relative to the guide bar 18.

The core-stone drilling machine 32, which has a hydraulic motor 34, a gear 36 and a core drill 38, is mounted on the sliding carriage 28. A rigid intermediate piece 40 is arranged between the gear 36 and the sliding carriage 28, via which the core-stone drilling machine 32 is connected to the sliding carriage 28. To connect the intermediate piece 40 to the sliding carriage 28, the latter has a conical dovetail recess 41 (Fig. 3).

The construction of the guide beam 18, the connection of the sliding carriage 28 to the guide beam 18 and the clamping of the guide beam 18 to the base 12 will be described below with reference to Fig. 3.

The guide beam 18 is designed as a hollow profile 42 with internal struts 44 or internal walls 44. The hollow profile 42 is a profile made of light metal and manufactured using an extrusion process. Between the individual internal walls 44, cavities 46 are formed that extend through the guide beam 18 in the longitudinal direction of the latter. The guide beam 18 has a beam core 48, which is indicated in Fig. 3 by dashed lines. The beam core 48 is surrounded by four integrally formed profiles that are arranged similarly to the edges of a square profile. The two hollow profiles arranged on the front side 26 of the guide beam 18 are two guide profiles 50, over which the sliding carriage 28 is guided on the guide beam 18. The other two hollow profiles are two clamping profiles 52, by means of which the guide beam 18 is clamped to the base 12 or by means of which tools can be attached and secured to the guide beam 18 using corresponding clamping fixtures. Both the guide profiles 50 and the clamping profiles 52 are connected in one piece to the beam core 48; the hollow profile of the beam core 48 and the guide and clamping profiles 50, 52 are an integral part of the guide beam 18. While the guide profiles 50 are arranged on the front side 26 of the guide beam 18, the clamping profiles are located on the rear side 54 of the guide beam 18 facing away from the front side 26.

As can be seen in Fig. 3, the guide profiles 50 each have a V-shape in cross-section. Each guide profile 50 consists of two legs 56, 57 that run at an obtuse angle to one another or stand on top of one another. The V-shaped recesses 60 delimited by the inner surfaces 58 of the legs 56 are open to the sliding carriage 28 in relation to the guide beam 18.

At least four sliding pieces 62 are immersed in these V-shaped recesses 60 of the guide profiles 50, which have a cross-section complementary to the V-shaped recess 60. The sliding pieces 62 are screwed to the underside of the sliding carriage 28 facing the front side 26 of the guide bar 18.

The arrangement of the guide profiles 50 relative to the beam core 48 is such that the outer legs 56 facing away from each other protrude laterally beyond the beam core 48, while a recess 64 is formed in the front side 26 between the inner legs 57 facing each other.

On the underside of the laterally projecting outer legs 56 there are sliding bodies in the form of rotating rollers 66. The peripheral surfaces of the rollers 66 rest on the outer surface 68 of the outer legs 56, which run parallel to the inner surfaces 58 of the outer legs 56. The axes of rotation 67 of the rollers 66 run parallel to the outer surface 68 and the rollers 66 are mounted on flanges 70 arranged laterally to the outer legs 56. The flanges 70 protrude on both long sides of the guide beam 18 and are connected to a light metal plate 72 spanning the front side 26 of the guide beam 18. The sliding pieces 62 are screwed onto the light metal plate 72. The rollers 66 are rotatably mounted on roller holders 74, which are guided in sleeves 76 so that they can be moved in the direction of the axis of rotation of the rollers 66. The sleeves 76 are connected to the flanges 70. By moving the rollers 66 away from the guide beam 18, the rollers 66 come out of engagement with the outer surfaces of the outer legs 56 of the guide profiles 50. In this state, the

Outer leg 56, so that the sliding carriage 28 can be placed on the guide bar 18 or removed from it.

As can also be seen in Fig. 3, the guide rail 18 is clamped in place (at its lower end in the base 12). For this purpose, the base 12 has two parallel cross struts 78, between which the guide rail 18 is arranged. One of the two cross struts 78 has a fixed hook-shaped projection 80, which encloses and holds one of the two clamping profiles 52 on the outside. A second hook-shaped projection 82 of the cross strut 78 is connected to the cross strut 78 via a screw 84. The second hook 82 is designed as a removable block, which has an elongated hole 86 through which the screw 84 passes. The hook-shaped projection block 82 can be moved away from the other hook-shaped projection 80 when the screw 84 is loosened; In this state, the guide bar 18 can be inserted into the base 12, with the fixed hook-shaped projection 80 enclosing one of the two clamping profiles 52. The movable hook projection block 82 is then moved in the direction of the guide bar 18, enclosing the second clamping profile 52. In this enclosing position, the block 82 can be locked onto the cross strut 78; by tightening the screw 84, a clamping force is exerted on the clamping profile 52 that is sufficient to hold the guide bar 18 on the base 12.

Due to the design of the guide beam 18 as a hollow profile with inner walls 44 and inner cavities 46 as well as the guide profiles 50 and clamping profiles 52 arranged on the longitudinal edges, the guide beam 18

extremely rigid in terms of bending and/or torsion. The hollow profile guide beam 18 is constructed symmetrically to its central longitudinal plane 85. Both the two guide profiles 50 arranged symmetrically to the plane 85 and the two clamping profiles 52 also arranged symmetrically to the plane 85 are arranged in the transition areas between the front side 26 and the side surface of the beam core 48 and between the rear side 54 and the side surface of the beam core 48. The central longitudinal plane 85 also runs in its extension through the sliding carriage 28, which is also constructed symmetrically with respect to this plane.

In Figs. 4 and 5, a tool stand 86 according to a second embodiment is shown in side view and top view. As far as possible, the parts of the tool stand 86 that correspond to the parts of the tool stand 10 are provided with the same reference numbers. In contrast to the tool stand 10, the tool stand 86 has a base 88 that clamps two vertical guide bars 18. The clamping connection corresponds to that shown in Fig. 3. Each vertical guide bar 18 is provided with a sliding carriage 28 that is held in a sliding manner on the front side 26 of the relevant guide bar 18. The two sliding carriages 28 are connected to one another via a plate 90. A fixed intermediate piece 92 is attached to the plate 90 as a spacer, which is directed away from the guide bars 18. At the end of the intermediate piece 92, a further sliding carriage 28 is rotatably attached via a pivot bearing 94, which is held in a slidingly displaceable manner on the front side 26 of a further guide bar 18'. The

The front side 26 of the guide beam 18' is thus opposite the front sides 26 of the identical guide beams 18 of the base 88. The housing 96 of a stone circular saw 98 is clamped to the clamping profiles 52 on the rear side 54 of the individually arranged guide beam 18'. The stone circular saw 98 is attached to one end of the guide beam 18'. A deep hole can be sawed using the tool stand 86 shown in Figs. 4 and 5, in that the guide beam 18' holding the circular saw 98 can be moved relative to the sliding carriage 28 in the direction of the double arrow 100 using a hand crank 30 in order to insert the lower end of the guide beam 18' holding the circular saw 98 into a previously drilled hole in the substrate 16. The circular saw blade 102 cuts a slot in the subsurface 16 that is long enough to match its diameter. By turning the second hand crank 30, the double carriage can be moved up and down in the direction of the double arrow 104 on the double guide beam 18 of the base 88. Fig. 6 shows the tool stand 86 in a position in which the guide beam 18' holding the circular saw 98 is rotated relative to the double guide beam 18 of the base 88. This allows slots created by the circular saw blade 102 to be made in the stone or concrete at any point along an arc line extending over 360°.

The tool stand 86 shown in Figs. 4 to 6 shows the versatility of the modular system, which allows tool stands for stone drills and stone saws to be assembled that are adapted to the needs from the basic elements of guide bars, sliding carriages and intermediate pieces with pivot bearings to the sliding bodies.

A final example of the variety and combination possibilities that can be realized with the basic elements of the tool stand mentioned above is shown in Fig. 7. In Fig. 7, the parts of the tool stand 10 according to Figs. 1 and 2 are provided with the same reference numerals. The tool stand 106 according to Fig. 7 has two bases 12 resting on the base 16, each of which clamps a vertical guide bar 18. The two bases 12 are arranged at a distance from one another, with the vertical guide bars 18 running parallel to one another and their front sides 26 aligned in the same way. Each vertical guide bar 18 is provided with a sliding carriage 28 of the type described above. The two sliding carriages 28 carry another guide bar 18'', which is arranged horizontally. The front of this horizontal guide beam 18'' is aligned in the same way as the front of the vertical guide beam 18. The horizontal guide beam 18'' in turn carries a sliding body (not shown in Fig. 7), which is connected via a spacer element (also not shown in Fig. 7) to another sliding carriage, which is slidably mounted on another vertical guide beam 18'. As in the case of the tool stand 86 according to Figs. 4 to 6, this vertical guide beam 18' carries a stone circular saw 98 with saw blade 102, specifically at the lower end of the vertical guide beam 18'. In the tool stand 106 according to Fig. 7, the stone saw 98 can be moved both horizontally along the base 16 and vertically, for example to work as a deep hole saw.

Claims (12)

EXPECTATIONS 1. Tool stands, especially for stone drills or stone saws, with - at least one base (12), at least one guide bar (18) connected to the base (12) and a sliding carriage (28) displaceable on the at least one guide beam (18),
characterized , - that the guide bar (18) has two guide profiles (50) spaced apart from one another and parallel to one another, against which sliding pieces (62) of the sliding block (28) slide, - that the sliding carriage (28) has at least two spaced-apart sliding pieces (62) per guide profile (50) and is held with the sliding pieces (62) resting against the guide profiles (50) and secured against tilting relative to the guide beam (18) in a removable manner and that the guide bar (18) has two clamping profiles (52) spaced apart from one another and parallel to one another for clamping the guide bar (18) to a mounting device (78-84) of the base (12) and/or a tool. 2. Tool stand according to claim 1, characterized in that at least two guide bars (18) movable relative to one another are provided, each with at least one sliding carriage (28) and that the two sliding carriages (28) are mechanically coupled to one another via an intermediate piece (92). 3. Tool stand according to claim 1 or 2, characterized in that the guide beam (18) has a one-piece beam core (48) to which the two guide profiles (50) are connected in one piece, and that the guide profiles (50) are arranged on a common side (26) of the beam core (48). 4. Tool stand according to claim 3, characterized in that the two guide profiles (50) are arranged protruding from the beam core (48) and have a V-shaped structure in cross section, the V-shaped recesses (60) being open towards the sliding carriage (28) which can slide on the guide profiles (50) and the sliding pieces (62) of the sliding carriage (28) being immersed in the V-shaped recesses (60). 5. Tool stand according to claim 4, characterized in that the two mutually opposite outer legs (56) of the V-shaped guide profiles (50) protrude laterally beyond the beam core (48) and that sliding bodies (66) are arranged on the sliding carriage (28), the sliding pieces (62) and the sliding bodies (66) resting on both sides of the outer legs (56) of the V-shaped guide profiles (50). 6. Tool stand according to one of claims 1 to 5, characterized in that the clamping profiles (52) are connected in one piece to the beam core (48) and protrude laterally beyond it and that the holding device (78-84) can be clamped to the two clamping profiles (52). 7. Tool stand according to claim 5 and 6, characterized in that the guide profiles (50) and the gill profiles (52) are arranged symmetrically to a central longitudinal plane of the guide bar (18) extending through the slide (28) and are located in the four transition areas between the front surface (26) and the side surface as well as the side surface and the rear surface (54) of the guide bar (18). 8. Tool stand according to one of claims 3 to 7, characterized in that the beam core (48) is designed as a hollow profile with internal struts (44). 9. Tool stand according to one of claims 2 to 8, characterized in that two bases (12) with each a guide bar (18) are arranged at a distance from one another, with a sliding carriage (28) being guided on each guide bar (18), that a holding device is mechanically coupled to each sliding carriage (28) and that a further guide bar (18'') is clamped to the two holding devices via its clamping profiles (52), with a sliding carriage (28) with a holding device for a tool being slidably guided on the further guide bar (18''). 10. Tool stand according to claim 9, characterized in that an additional guide bar (18') is slidably mounted on the slide (28) of the further guide bar (18''), which carries a tool (98). — 1Ö ~ 11. Tool stand according to one of claims 2 to 8, characterized in that a base (88) is provided with two guide beams (18) arranged parallel to one another and next to one another and connected to the base (88), each guide beam (18) being assigned a sliding carriage (28), and that the two sliding carriages (28) are mechanically coupled and are mechanically coupled together with a holding device for a tool. 12. Tool stand according to claim 11, characterized in that the two sliding carriages (28) coupled to one another are coupled to a further sliding carriage (28) on which a further guide bar (18') is displaceably guided via its guide profiles (50), this further guide bar (18') carrying a tool (98).