EP3960405B1 - Tischsäge - Google Patents

Tischsäge Download PDF

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Publication number
EP3960405B1
EP3960405B1 EP21199058.5A EP21199058A EP3960405B1 EP 3960405 B1 EP3960405 B1 EP 3960405B1 EP 21199058 A EP21199058 A EP 21199058A EP 3960405 B1 EP3960405 B1 EP 3960405B1
Authority
EP
European Patent Office
Prior art keywords
section
saw blade
lay
saw
pivoting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21199058.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3960405A1 (de
Inventor
Ondrej KOVÁCS
Václav ZVÁNOVEC
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festool GmbH
Original Assignee
Festool GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Festool GmbH filed Critical Festool GmbH
Publication of EP3960405A1 publication Critical patent/EP3960405A1/de
Application granted granted Critical
Publication of EP3960405B1 publication Critical patent/EP3960405B1/de
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/16—Saw benches
    • B27B5/22—Saw benches with non-feedable circular saw blade
    • B27B5/24—Saw benches with non-feedable circular saw blade the saw blade being adjustable according to depth or angle of cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B27/00—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon
    • B27B27/04—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon arranged perpendicularly to the plane of the saw blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/16—Saw benches
    • B27B5/22—Saw benches with non-feedable circular saw blade
    • B27B5/24—Saw benches with non-feedable circular saw blade the saw blade being adjustable according to depth or angle of cut
    • B27B5/243—Saw benches with non-feedable circular saw blade the saw blade being adjustable according to depth or angle of cut the saw blade being arranged underneath the work-table

Definitions

  • the invention relates to a table saw according to the preamble of claim 1.
  • a table saw is from the document EP 3 424 656 A1 known,
  • the table saw includes a support structure with a support section that provides a support surface for supporting a workpiece, and a saw blade that reaches through an opening in the support section so that at least a portion of the saw blade is located below the support section underside.
  • the table saw further comprises a housing arrangement located below the underside of the support section, which surrounds the part of the saw blade located below the underside of the support section. The saw blade, together with the housing arrangement, can be pivoted relative to the support section in order to set an angle between a cutting plane of the saw blade and the support surface.
  • the EP 3 424 656 A1 describes a table saw with a locking device, which includes a locking element movably mounted on a pivot bearing.
  • One object of the invention is to increase operational safety.
  • the task is solved by a table saw according to claim 1.
  • the table saw comprises a cover flap which covers a gap that arises when the housing arrangement is pivoted between the housing arrangement and the underside of the support section, in order to prevent a user of the table saw from passing through the gap can reach for the saw blade. In this way, the operational safety of the table saw can be increased.
  • the cover flap is expediently mounted on the housing arrangement and/or the support structure, in particular movable.
  • the cover flap is movably mounted on the housing arrangement and/or fixedly mounted on the support structure.
  • the cover flap can be moved from a first position to a second position by pivoting the housing arrangement. In the first position, the cover flap is aligned parallel to the underside of the support section and, in the second position, is aligned inclined about a horizontal axis to the underside of the support section.
  • the support structure expediently has several legs, via which the support section can be supported relative to the ground. There are free areas between the legs through which a user can reach under the underside of the support section.
  • the table saw, in particular the support structure is therefore, to a certain extent, unencapsulated and allows a user to easily reach under the support section.
  • a saw blade cover is also described.
  • the saw blade cover is designed in particular as a saw blade cover and includes a saw blade cover in a longitudinal direction extending cover body made of a first material for at least partially covering a saw blade of the table saw.
  • the saw blade cover further comprises a contact area arranged on the front side of the cover body. The contact area is beveled relative to the longitudinal direction, so that a deflection of the cover body can be brought about by contact of the contact area with a workpiece brought to the saw blade.
  • One task is to modify the saw blade cover so that the likelihood of malfunctions can be reduced.
  • the task is solved by a saw blade cover in which the contact area has a sliding section made of a second material, along which the workpiece can slide when it comes into contact with the contact area.
  • the workpiece is made of a hard material and/or has a sharp edge on the side to be fed to the saw blade
  • conventional saw blade covers it can happen that the workpiece cuts into the material of the contact area when it comes into contact with the contact area and consequently into the contact area Keeps hanging. It can then happen that the saw blade cover is not deflected, so that the cutting area of the saw blade is not released. As a result, the workpiece cannot be brought to the cutting area of the saw blade - this results in a disruption in the operation of the table saw.
  • the sliding section can prevent a workpiece from cutting into the contact area when it comes into contact with it and getting stuck on the contact area. Consequently, the likelihood of malfunctions can be reduced.
  • the first material may also be referred to as a cover body material and the second material may also be referred to as a sliding portion material.
  • the second material is different from the first material.
  • the second material expediently has a greater hardness than the first material.
  • the first material is in particular plastic and/or the second material is in particular metal, preferably aluminum.
  • the sliding section is expediently strip-shaped.
  • the sliding section is preferably designed as an aluminum strip.
  • the contact area and the sliding section are elongated.
  • the sliding section expediently runs in the longitudinal direction of the contact area.
  • the contact area is expediently a frontal contact surface.
  • the sliding section is expediently present only in a partial area, in particular a central partial area in the horizontal direction, of the front contact surface.
  • the entire contact area in particular the entire contact surface, is made of the second material.
  • a saw blade cover is also provided, the cover body of which is made entirely of metal, in particular aluminum.
  • the invention further relates to a table saw with a saw blade cover described above, a support section for placing the workpiece, and the saw blade.
  • the cover body at least partially covers the saw blade in a covering position.
  • the cover body is mounted movably relative to the saw blade, so that the cover body can be moved into a release position by acting on the contact area with the workpiece moving on the support section in the direction of the saw blade, in which the saw blade is released further than in the cover position.
  • the cutting area of the saw blade is released in the release position.
  • the cutting area is the area of the saw blade with which the workpiece is processed when the table saw is used as intended.
  • a stop unit for guiding and/or advancing a workpiece to a saw blade of a table saw.
  • the stop unit comprises a stop arm extending in a longitudinal direction for abutting the workpiece.
  • the stop arm comprises a main section made of a first material, which extends over more than half of the longitudinal extent of the stop arm.
  • the stop arm further includes at least one at a longitudinal end of the main section arranged second end section. The second end section can come into contact with the saw blade when a workpiece is advanced towards the saw blade.
  • One task is to modify the stop unit so that the likelihood of malfunctions can be reduced.
  • the task is solved by a stop unit in which the at least one end section is made of a second material.
  • the end section When the workpiece is advanced using the stop unit, the end section may come into contact with the saw blade.
  • Conventional stop units usually have a one-piece metal stop arm. If the saw blade comes into contact with a metal end section of such a conventional stop arm, it can happen (if the table saw has a certain safety function) that the saw blade is stopped and/or moved to a safety position. This will disrupt the operation of the table saw. Furthermore, damage to the stop arm can occur, so that due to the one-piece design, the entire stop arm must be replaced.
  • the material of the end section (in particular independently of the material of the main section) can be selected so that a safety function that may be present in the table saw is achieved through the contact of the saw blade with the end section is not triggered. Furthermore, the material of the end section can be chosen so that the end section can be provided as a cheap wearing part.
  • the main section can be made of a stable, durable material, such as metal, even if this material would trigger the safety function if the saw blade came into contact with the main section.
  • first material and “second material” features mentioned in relation to the stop unit are different features than the “first material” and “second material” features mentioned above in relation to the saw blade cover.
  • the feature “first material” referred to in relation to the stop unit may also be referred to as “third material” or as “main section material” and the “second material” referred to in relation to the stop unit may also be referred to as “fourth material” or as " “End section material”.
  • the second material mentioned in relation to the stop unit differs from the first material mentioned in relation to the stop unit.
  • the second material has a different conductivity than the first material.
  • the first material is metal and/or the second material is plastic.
  • the at least one end section is expediently detachably attached to the main section.
  • the at least one end section is inserted into and/or onto an end face of the main section.
  • the main section is expediently an extruded profile and/or the end section is a plastic cap.
  • a table saw is described with a stop unit described above, a support section for placing the workpiece, and the saw blade.
  • the table saw is expediently designed to carry out a safety function, in particular for stopping the saw blade and/or for moving the saw blade into a safety position, based on an electrical property, in particular an electrical conductivity, of an object in contact with the saw blade.
  • the electrical property, in particular the electrical conductivity, of the second material is such that the table saw does not perform the safety function when the saw blade comes into contact with the end section.
  • the safety function is expediently not triggered by contact of the saw blade with the workpiece and is triggered when the saw blade comes into contact with the human body.
  • a table saw comprising a saw blade and a support structure with a support surface for placing the workpiece when machining the workpiece with the saw blade.
  • the table saw comprises a stop unit, in particular a stop unit explained above, for guiding and/or advancing the workpiece to the saw blade.
  • the stop unit includes a bearing portion that engages a guide member of the table saw so as to provide movable mounting of the stop unit relative to the support structure along the guide member.
  • the guide element is arranged offset downwards relative to the support surface.
  • the bearing section comprises rollers via which the bearing section is movably mounted relative to the support section. Two of the rollers are expediently aligned in different spatial directions to one another.
  • the x-direction can also be referred to as the height direction and is vertical.
  • the x direction and the y direction are horizontal directions.
  • the table saw 10, 20, 30 is designed as a circular table saw.
  • the table saw 10, 20, 30 is in particular a semi-stationary tool.
  • the table saw 10, 20, 30 includes a saw blade 2, in particular a circular saw blade.
  • the table saw 10, 20, 30 expediently includes a drive unit 86 for driving, in particular rotary drive, the saw blade 2.
  • the drive unit 86 expediently includes an electric motor.
  • the table saw 10, 20, 30 includes a support structure 12, which is designed as a table as an example.
  • the support structure 12 comprises a support section 1, the top of the support section 8 serves as a support surface 8 for a workpiece 11 to be machined with the saw blade 2.
  • the support section 1 is designed in the form of a plate, in particular as a table top.
  • the support section 1 expediently has a rectangular base area.
  • the support surface is 8 conveniently rectangular.
  • the support surface 8 is aligned normal to the z-direction and is preferably flat.
  • the support structure 12 further comprises a plurality of supporting legs 7 - for example four supporting legs 7 arranged at the four corner regions of the support section 1 - via which the supporting section 1 is supported relative to the ground. Between the legs 7 there are expediently free areas which, for example, extend over more than three quarters of the vertical extent of the legs 7. In particular, there is no cladding, in particular no housing wall, between two or more legs 7. A user can reach between two legs 7 into the free space below the underside of the support section 14.
  • the support section 1 in particular the support surface 8, there is an opening, for example a slot, through which the saw blade 2 reaches.
  • the opening is aligned with its longitudinal direction in the x direction.
  • a part of the saw blade 2 is located above the support section 1, in particular above the support surface 8, and another part of the saw blade is located below the support section 1, in particular below the underside of the support section 14.
  • the table saw 10, 20, 30 includes a safety function that is automatically triggered when contact is detected between the saw blade 2 and a part of a person's body.
  • the table saw 10, 20, 30 is expediently designed to provide an electrical property, in particular an electrical one, to the saw blade 2 Detecting the conductivity of an object in contact with the saw blade to determine whether the object is a human body part.
  • the table saw 10, 20, 30 is further designed to carry out the safety function based on the detected electrical conductivity.
  • the safety function for example, the saw blade 2 is stopped, in particular braked, and/or the saw blade 2 is moved into a safety position, in particular into a safety position in which the saw blade 2 is located completely below the support surface 8.
  • the table saw 10, 20, 30 has, for example, an adjusting section 3, which is in the example Figures 7 and 8 is shown.
  • the adjusting section 3 is designed to adjust the position of the saw blade 2 relative to the support surface 8.
  • the adjusting section 3 is expediently designed to pivot the saw blade 2 relative to the support surface 8 about a pivot axis running in the x direction in order to set an angle between the cutting plane of the saw blade 2 and the support surface 8.
  • the adjusting section 3 is expediently designed to move the saw blade 2 into different positions along a linear movement path, in particular a vertical and/or linear movement path that can be pivoted about the above-mentioned pivot axis, in order to adjust how far the saw blade 2 rises out of the opening protrudes. This way you can For example, the cutting depth of the table saw 10, 20, 30 can be adjusted.
  • the saw blade cover 40 will be discussed in detail below.
  • the saw blade cover 40 may be provided as part of one of the table saws 10, 20, 30 described herein and/or on its own.
  • the saw blade cover 40 expediently represents an embodiment in itself.
  • the saw blade cover 40 is in itself Figure 1 shown. In the Figures 2 and 6 the saw blade cover 40 is shown in a state attached to the table saw 10, 20, 30.
  • the saw blade cover 40 is designed in particular as a saw blade cover and comprises a cover body 41 which extends in a longitudinal direction (the saw blade cover 40) and is made of a first material for at least partially covering the saw blade 2 of the table saw 10, 20, 30.
  • the saw blade cover 40 further comprises a contact area 47 arranged on the front side of the cover body 41.
  • the contact area 47 is beveled relative to the longitudinal direction of the saw blade cover 40, so that a deflection of the cover body 41 can be brought about by contact of the contact area 47 with a workpiece 11 moving towards the saw blade 2.
  • the contact area 47 has a sliding section 48 made of a second material, along which the workpiece 11 can slide along when it comes into contact with the contact area 47.
  • the sliding section 48 is intended to prevent the workpiece 11 from cutting into the contact area 47 when it comes into contact with it and getting stuck on the contact area 47.
  • the second material is different from the first material.
  • the second material expediently has a greater hardness than the first material.
  • the first material is in particular plastic and/or the second material is in particular metal, preferably aluminum.
  • the saw blade cover 40 in particular the cover body 41, is preferably elongated and in particular flat and/or plate-shaped.
  • the cover body 41 is designed in the shape of a sword.
  • the largest sides of the cover body 41 - in particular the long sides - are aligned normal to a horizontal direction, in particular normal to the y-direction, as shown in FIGS Figures 2 and 6 is shown.
  • an opening 43 in particular a slot, into which the saw blade 2 can be at least partially accommodated.
  • the saw blade 2 is covered, for example, by the long sides, the top and/or the front end face of the cover body 41.
  • the saw blade cover 40 includes a connection section 44, which, for example, has a suction connection 45.
  • a suction hose (not shown in the figures) can be connected to the suction connection 45 in order to suck out dust particles that arise when sawing the workpiece 11.
  • the connection section 44 comprises a mechanical interface for fastening the saw blade cover 40 to a fastening section 46 of the table saw 10, 20, 30, in particular to the riving knife 9.
  • the riving knife 9 is exemplarily arranged in the x direction behind the saw blade 2.
  • the riving knife 9 protrudes, for example, from the opening of the support surface 8.
  • the cover body 41 is expediently mounted on the connecting section 44 so that it can pivot about a horizontal axis, in particular an axis running in the y-direction.
  • connection section 44 is arranged in the longitudinal direction of the saw blade cover 40 on the rear end face of the saw blade cover 40.
  • the saw blade cover 40 is expediently aligned with its longitudinal direction parallel to the x direction.
  • the contact area 47 already mentioned above is arranged in the longitudinal direction of the saw blade cover 40 on the front end face of the saw blade cover 40.
  • the contact area 47 expediently represents the front end face of the saw blade cover 40, in particular the front end face of the cover body 41.
  • the contact area 47 is beveled relative to the longitudinal direction of the saw blade cover 40. Like in the Figures 2 and 6 As can be seen, the contact area 47 (in the installed state of the saw blade cover 40) is beveled relative to the x-direction and relative to the support surface 8, i.e. aligned inclined. In particular, the contact area 47 is aligned normal to an xz direction. In an xz cut, the contact area 47 runs obliquely from the bottom to the top right, in the direction away from the saw blade 2.
  • the cover body 41 expediently has a contact point 53, which in the installed state Saw blade cover 40 preferably forms the lowest point of the saw blade cover 40 and / or rests on the support surface 8 (provided the cover body 41 is not deflected, in particular raised, by the action of the workpiece 11).
  • the contact area 47 is expediently curved in an xz section, in particular parabolic.
  • the contact area 47 is beveled in such a way that when a workpiece 11 located on the support surface, which moves in the x direction towards the saw blade 2, hits the contact area 47, a force component (in particular an upward force component) is provided. which causes a deflection, in particular a pivoting, of the cover body 41 relative to the saw blade 2, the support surface 8 and/or the connecting section 44, in particular an upward deflection and/or pivoting.
  • the position of the cover body 41 can be changed so that the cover body 41 clears the path to the saw blade 2 and/or the cutting area of the saw blade 2.
  • the cover body 41 expediently lifts off the contact surface 8 with its contact point 53.
  • the cover body 41 Before the workpiece 11 comes into contact with the contact area 47, the cover body 41 is expediently in a covering position in which the cover body 41 at least partially covers the saw blade 2 and the contact point 53 expediently rests on the support surface 8. If the contact area 47 is acted upon by the workpiece 11 moving in the direction of the saw blade 2, the cover body 41 is deflected further and further until it is in a release position in which the saw blade 2 is released further than in the covering position. In the release position, the cover body 41 is expediently deflected to such an extent that the workpiece 11 can be fed to the cutting area of the saw blade 2 and can be processed by the saw blade 2.
  • the sliding section 48 is expediently designed in the form of a strip, in particular in the form of a band.
  • the sliding section 48 is preferably designed as a metal strip, in particular as an aluminum strip.
  • the sliding section 48 can also be made of another hard material, which is expediently harder than the first material of the cover body 41.
  • the sliding section 48, in particular the aluminum strip is embedded in the contact area 47, in particular the contact surface, and/or placed on it, in particular glued on.
  • the contact area 47 and the sliding section 48 are preferably elongated.
  • the sliding section 48 expediently runs in the longitudinal direction of the contact area 47.
  • the longitudinal direction of the contact area 47 and/or the sliding section 48 expediently runs diagonally upwards relative to the support surface 8, in particular in the direction away from the saw blade 2.
  • the contact area 47 is expediently a frontal contact surface, in particular of the cover body 11.
  • the sliding section 48 is expediently present only in a partial area, in particular a central partial area in the horizontal direction, in particular in the y direction, of the front contact surface.
  • surface sections 49 expediently arise laterally from the sliding section 48, on which the sliding section 48 is not present.
  • These surface sections 49 are expediently made of the first material and, for example, take up more than half of the y-extension of the contact surface, so that the sliding section 48 expediently occupies less than half of the y-extension.
  • the entire contact area in particular the entire contact surface, is made of the second material, so that the entire contact area represents the sliding section.
  • the sliding section 48 expediently extends over more than half of the longitudinal extent of the contact area 47.
  • the cover body 41 has an obliquely upwardly projecting projection 52, which is arranged in the area of the front end face of the cover body 41, and a part of the contact area 47 provides.
  • the sliding section 48 expediently extends into the part of the contact area 47 provided by the projection 52.
  • the sliding section 48 can also be referred to as a reinforcement of the end face of the saw blade cover.
  • the saw blade cover can also be referred to as a protective device become.
  • the sliding section 48 is expediently a strip made of a hard material which is attached to the protective device, so that the end face - in particular the contact area 47 - of the protective device can slide with the strip on a contact edge of a cut material of a workpiece to be machined.
  • the sliding section 48 - exemplified by the hard material strip - protects the end face of the protective device from being pinched (digging/notching) on the sharp contact edge of the cut material, which slides over the hard material strip when the cut material is guided into the cut.
  • a saw blade cover is also provided as an embodiment, the cover body of which is made entirely of metal, in particular aluminum.
  • This saw blade cover is expediently designed as explained above, except for the aspect that the sliding section is not made of a second material but of the same material as the rest of the cover body.
  • the invention further relates to a stop unit 50, in particular an angle stop, for guiding and/or advancing a workpiece 11 to a saw blade 2 of a table saw.
  • the stop unit 50 in itself provides an embodiment and is in itself in the Figure 3 shown.
  • the stop unit 50 can also be provided as part of a table saw.
  • the Figure 6 shows a corresponding table saw 20, which has a stop unit 50.
  • the stop unit 50 comprises a stop arm 55 extending in a longitudinal direction 54 for abutting the workpiece 11.
  • the stop arm 55 is aligned with its longitudinal direction in the y direction, for example.
  • the stop arm 55 includes a main section 51 made of a first material, which extends over more than half of the longitudinal extent of the stop arm 55.
  • the “first material” feature mentioned here is a different feature than the “first material” feature mentioned above with respect to the saw blade cover 40.
  • the “first material” mentioned herein with respect to the stop unit 50 may also be referred to as the "third material” or the “main section material” for the purpose of better distinction.
  • the stop arm 55 further comprises at least one second end section 52 arranged at an end of the main section 51 located in the longitudinal direction 54.
  • the stop arm 55 comprises a second end section 52 at both ends located in the longitudinal direction, so that the stop arm has two end sections 52.
  • the second end section 52 can come into contact with the saw blade 2 when a workpiece 11 is advanced towards the saw blade 2.
  • the stop unit 50 in a state mounted on the support structure 12 of the table saw 20, the stop unit 50 can be moved into a position in which the end section 52 comes into contact with the saw blade 2, in particular the cutting area of the saw blade 2.
  • the at least one end portion 52 is made of a second material that is different from the first material.
  • the "second material” feature mentioned here is a different feature than that referred to above Saw blade cover 40 mentioned “second material” feature.
  • the "second material” mentioned here in relation to the stop unit 50 may also be referred to as the "fourth material” or as the "end section material” for the purpose of better distinction.
  • the second material is different from the first material.
  • the second material has a different conductivity than the first material.
  • the first material is metal and/or the second material is plastic.
  • the second material in particular has a different, preferably lower, electrical conductivity than the human body.
  • the end section 52 made of the second material, it is possible to prevent the above-mentioned safety function of the table saw 20 from being triggered (if it is present) when the end section 52 comes into contact with the saw blade 2.
  • the table saw 20 is expediently designed to carry out the safety function, in particular for stopping the saw blade 2 and/or for moving the saw blade 2 into a safety position, based on an electrical property, in particular an electrical conductivity, of an object in contact with the saw blade 2.
  • the electrical property, in particular the electrical conductivity, of the second material is such that the table saw 20 does not perform the safety function when the saw blade comes into contact with the end section 52.
  • the electrical property, in particular the electrical conductivity, of the first material is such that the table saw 20 carries out the safety function when the saw blade comes into contact with the first material.
  • the stop arm 55 is expediently designed in the form of a strip and can also be referred to as a guide strip.
  • the stop arm 55 is aligned with its largest side in terms of area - its long side - normal to a horizontal direction, expediently orthogonal to the support surface 8.
  • the main section 51 of the stop arm 55 expediently extends over more than 70% of the longitudinal extent of the stop arm 55.
  • the main section 51 is designed in the form of a strip and is aligned with its largest side orthogonally to the support surface 8.
  • the long sides of the main section 51 is, for example, rectangular.
  • the main section 51 is expediently an extruded profile and is in particular made of metal.
  • an end section 52 adjoins both ends of the main section 51.
  • Each end section expediently takes up less than 20% of the longitudinal extent of the stop arm 55.
  • Each end section 52 expediently continues the transverse outer contour of the main section 51 in the longitudinal direction, so that the stop arm 55 results overall as a strip-shaped body with a constant thickness.
  • Each end section 52 expediently has the same thickness as the main section 51.
  • the end face of each end section 52 located in the longitudinal direction of the stop arm 55 is expediently beveled.
  • Each end section 52 is normal to the surface with its largest side - the long side Support surface 8 aligned. Due to the bevel on the respective end face, the long side of each end section 52 is, for example, triangular.
  • Each end section 52 is conveniently removably attached to the main section 51.
  • each end section 51 is inserted into and/or onto an end face of the main section 52.
  • Each end section 52 is expediently designed as a plastic cap.
  • Each end section 52 is expediently attached to the main section 51 via a snap connection.
  • each end section 51 has a locking element 62 which engages in a corresponding locking opening in the main section 51.
  • Each end section 52 can conveniently be removed from the main section 51 and replaced by a new, identically designed end section 52.
  • Each end section 52 is expediently a wearing part. In particular, tool-free and/or non-destructive attachment and/or removal of each end section 52 from the main section 51 is possible.
  • the stop arm 55 expediently further comprises a cover layer 53, which is arranged on a long side of the stop arm 55.
  • the cover layer 53 is arranged in particular on that long side of the stop arm 55 on which the workpiece 11 rests when the stop unit 50 is used as intended.
  • the cover layer 53 expediently covers the entire long side of the stop arm 55.
  • the cover layer 53 can expediently be made of a material that does not trigger the above-mentioned safety function when it comes into contact with the saw blade 2, that is, in particular, has a higher electrical conductivity than the human body and/or the main section 51.
  • the stop unit 55 further comprises a bearing section 67 with which the stop unit 55 can be movably mounted on the support structure 12 of the table saw 20.
  • the bearing section 67 comprises a roller section 56, on which a plurality of rollers 57, 58 are arranged, via which the bearing section 67 can be movably mounted on the support structure 12.
  • the roller section 56 exemplarily comprises a horizontal section 64 extending in a horizontal direction, on which several, exemplarily two, vertically extending vertical sections 65 are arranged.
  • each vertical section 65 comprises two rollers 57, 58 aligned in different spatial directions - for example, one horizontal roller 57, the roller plane of which is aligned parallel to a horizontal plane, and one vertical roller 58, the roller plane of which is aligned parallel to a vertical plane.
  • the roller section 56 expediently further comprises a sliding block 63.
  • the sliding block 63 is in particular elongated and is expediently arranged on the underside of the horizontal section 64.
  • the stop arm 55 is expediently mounted so that it can pivot about a vertical pivot axis relative to the bearing section 67 via a pivot bearing 60.
  • the pivot bearing 60 has an angular scale as an example.
  • the stop arm 55 is also expediently mounted so that it can move linearly relative to the bearing section 67 via a linear bearing.
  • the stop unit 50 has a connecting section 59, which is exemplary elongated and preferably extends in a horizontal direction, in particular in a direction orthogonal to the longitudinal direction of the horizontal section 64.
  • the stop arm 55 is expediently mounted on the connecting section 59 in a pivotable manner via the pivot bearing 60 and the connecting section 59 is mounted on the bearing section 67 in a linearly movable manner via the linear bearing, in particular in the longitudinal direction of the connecting section 59.
  • One or more operating elements are expediently present in order to lock and/or release the linear bearing, the pivot bearing 60 and/or the bearing of the bearing section 67 on the support structure.
  • the support structure 12 of the table saw 20 has one or more guide elements 6 on which the bearing section 67 is or can be stored.
  • each guide element 6 is arranged on a respective peripheral wall 5 of the support structure 12, in particular of the support section 1.
  • Each peripheral wall is oriented normal to a horizontal direction.
  • Each guide element 6 is expediently designed as a rail element running in the horizontal direction.
  • each guide element 6 provides a groove running in the horizontal direction, in particular a V-groove, into which the above-mentioned sliding block 63 is inserted when the bearing section 67 is mounted on the support structure 12.
  • Each guide element 6 is expediently arranged offset downwards in the z direction relative to the support surface 8.
  • Each guide element 6 provides a respective linear guide path for the bearing section 67.
  • the bearing section 67 can be removed from a guide element 6 and attached to another guide element 6, for example on another peripheral wall 5.
  • the stop unit 50 is mounted with its bearing section 67, for example, on a peripheral wall 5 aligned normally to the y-direction.
  • the stop unit 50 can be moved linearly in the x direction along the guide element 6 located on this peripheral wall 5.
  • the stop arm 55 is located at least partially on or above the support surface 8 and can be positioned in its x coordinate by the linear movement of the stop unit 50, in particular relative to the support section 1 and/or the saw blade 2.
  • the stop unit 50 can be removed from the peripheral wall 5 oriented normal to the y-direction and attached to a peripheral wall 5 oriented normal to the x-direction. There the stop unit 50 can then be moved in the y direction in order to position the stop arm 55 in its y coordinate.
  • the Figure 6 shows a detailed view of the storage of the bearing section 67 on the peripheral wall 5 and the Guide element 6 of the support structure 12.
  • the bearing section 67 is in engagement with the guide element 6.
  • the sliding block 63 is inserted into the groove provided by the guide element 6.
  • the vertical rollers 58 rest against the guide element 6 from below.
  • the horizontal rollers 57 rest on the peripheral wall 5.
  • the stop unit 50 is guided in a V-groove, which is not arranged in the table top (as is conventional) - for example the support surface 8 - but is instead arranged on the peripheral wall 5. Guidance is also carried out using rollers on the V-groove. In addition, there are practical side rollers - the horizontal rollers - which counteract tilting.
  • the rollers are rotatably mounted on the bearing section, which can also be referred to as an angle stop frame.
  • the guide arm is attached to the frame of the angle stop (example via the connecting section), which lies on the support section, which can also be referred to as the saw table. The guide arm guides the workpiece to be machined.
  • the guide arm is preferably adjustable at any angle in the range of +/-90° with respect to the cutting plane. At this angle it is possible to attach it to the angle stop frame and to guide and/or push the material into the cutting area of the saw blade at this angle.
  • the angle of rotation of the guide arm can be read on the angle scale, which is part of the angle stop.
  • the guide arm (which can also be referred to as a guide bar) has protective caps attached to the ends which, when sawing in, trigger a safety function, in particular an “Active Injury Mitigation”, AIM, function impede.
  • AIM Active Trauma Mitigation
  • the AIM function can also be referred to as the active injury mitigation function.
  • a table saw 30 will be explained, which provides another embodiment.
  • the table saw 30 is expediently designed like one of the table saws explained above.
  • the table saw 30 includes the support structure 12 with the support section 1, which provides the support surface 8 for supporting the workpiece 11, as well as the saw blade 2, which reaches through the opening of the support section 1, so that at least part of the saw blade 2 is below the support section. Bottom 14 is located.
  • the table saw 30 further comprises a housing arrangement 80 located below the underside of the support section 14, which surrounds the part of the saw blade 2 located below the underside of the support section 14. The saw blade 2 can be pivoted together with the housing arrangement 80 relative to the support section 1 in order to set an angle between a cutting plane of the saw blade 2 and the support surface 8.
  • the table saw 30 includes a cover flap 87 which covers a gap between the housing arrangement 80 and the underside of the support section 14 when the housing arrangement 80 is pivoted, in order to prevent a user of the table saw 30 from falling through the gap to the bottom of the support section. Part of the saw blade 2 located on the underside 14 can grab.
  • the adjusting section 3 serves to pivot the saw blade 2 about a horizontal pivot axis, in particular a pivot axis running in the x direction.
  • the adjusting section 3 comprises a bearing section 81 arranged on the support structure 12, in particular on the support section underside 14, and a pivoting section 82, which is pivotally mounted relative to the bearing section 81 about the said pivot axis.
  • the pivot axis is defined, for example, by a guide section 94 present on the bearing section 81, in particular a guide slot, on which the pivot section 82 is guided.
  • the Figure 7 shows the pivoting section 82 in a normal position in which the pivoting section 82 is not pivoted and is aligned orthogonally to the support section underside 14.
  • the Figure 8 shows the pivoting section 82 in a pivoting position in which the pivoting section 82 is pivoted and is not aligned orthogonally to the support section underside 14.
  • the pivoting section 82 exemplarily includes the housing arrangement 80, the saw blade 2 and expediently the drive unit 86.
  • the drive unit 86 and the saw blade 2 are preferably mounted in a linearly movable manner relative to the housing arrangement 80 in order to adjust how far the saw blade 2 protrudes from the opening in the support surface 8 .
  • the housing arrangement 80 exemplarily includes a housing shell 83, the largest side of which in terms of area, hereinafter also referred to as the side side 85, is aligned normal to the y-direction in the normal position.
  • the Housing shell 83 further comprises an upper side 84 which is aligned orthogonally to the lateral side 85 and which is aligned parallel to the support section underside 14 in the normal position of the pivoting section 82.
  • the housing shell 83 further comprises a transverse side 93 which is oriented orthogonally to the lateral side 85 and orthogonally to the top 84 and which is expediently oriented normal to the x-direction.
  • the cover flap 87 is expediently made of a rigid material, preferably metal.
  • the cover flap 87 is expediently designed as a cover plate.
  • the cover flap 87 comprises a plate-shaped cover section 88.
  • the cover flap 87 is elongated and its longitudinal direction is aligned in the x direction.
  • the cover flap 87 is, for example, mounted on the housing arrangement 80, in particular on the transverse side 93, and on the support structure, in particular on the underside of the support section 14.
  • the cover flap 87 comprises a first fastening section 89, which is expediently designed as a tab, and is pivotably mounted on the housing shell 83, in particular the transverse side 93, via the first fastening section 89.
  • the cover flap 87 further comprises a second fastening section 91, with which the cover flap 87 is expediently mounted in a linearly movable manner on the support structure 12, in particular a guide slot 92.
  • the second fastening section 91 is expediently an edge region of the cover flap 87.
  • the guide slot 92 is expediently a space between the support section underside 14 and another element of the support structure 12.
  • the second Fastening section 91 can also be firmly attached to the support structure 12.
  • the cover flap 87 can be moved from a first position to a second position by pivoting the pivoting section 82, in particular the housing arrangement 80.
  • the cover flap 87 is pivoted from the first position into the second position by pivoting the pivoting section 82 from the normal position into the pivoting position.
  • the cover flap 87 is aligned parallel to the support section underside 14 in the first position.
  • the cover flap 87 is expediently arranged at least partially between the top 84 and the underside 14 of the support section.
  • the cover flap 87 is aligned about a horizontal axis, in particular the x-axis, inclined to the underside of the support section 14.
  • the cover flap 87 is expediently mounted on the housing arrangement 80 and the support structure 12 in such a way that the cover flap 87 is pivoted in the opposite direction to the pivoting movement of the housing arrangement 80 by pivoting the housing arrangement 80.
  • the support structure 12 expediently has several legs 7, via which the support section 1 can be supported relative to the ground. There are free areas between the legs 7 through which a user can reach under the underside of the support section 14.
  • a covering device which covers the saw blade 2 so that the user cannot touch the saw blade 2 under the table.
  • the covering device can also be called a side saw blade cover.
  • the saw blade 2 is adjustable in angle and height.
  • the side saw blade cover consists of several parts that conveniently cover the saw blade in all positions of the adjustable range and prevent a finger from entering the saw blade under the table.
  • an accessory mounting structure 100 is provided.
  • the accessory mounting structure 100 is in the Figure 9 unequipped and in the Figure 10 shown equipped with accessories.
  • the accessory mounting structure 100 may be provided on its own or as part of a table saw, in particular one of the table saws 10, 20, 30 described above.
  • the accessory attachment structure 100 is expediently attached to the support section underside 14 and extends vertically downwards from the support section underside 14.
  • the accessory fastening structure 100 is essentially plate-shaped and is aligned with its plate plane normal to a horizontal direction, for example normal to the y-direction.
  • the accessory mounting structure 100 includes a plurality of interfaces to which accessories for the table saw can be attached, particularly accessories that are not currently in use.
  • the accessory fastening structure 100 is used in particular to store the accessory elements. When attached, the accessory elements are expediently freely accessible from the outside and can preferably be removed from the accessory fastening structure 100 without tools.
  • the accessory fastening structure 100 has one, several or all of the following interfaces: a first interface 101, comprising in particular a latching hook, for fastening a push stick 105, a second interface 102, in particular comprising a latching hook, for fastening the stop unit 50, a third interface 103, comprising in particular a locking hook, for attaching the riving knife 9, a fourth interface 104, in particular comprising a locking hook, for attaching a work center, for example a replacement cartridge, in particular for the safety function, and / or a fifth interface for attaching the saw blade cover.
  • the accessory mounting structure 100 is preferably used to securely store the accessories on the table saw.
  • the interfaces mentioned are integrated into the accessory fastening structure 100.
  • the interfaces expediently have fixing elements.
  • the accessory mounting structure 100 allows the user to easily remove the push stick 105 from the front of the table saw, which is oriented normal to the x direction.
  • the bag is attached to the table top using a screw and there is a side snap closure to reduce horizontal movement.
  • a suction plate 130 is provided.
  • the suction plate 130 is in the Figure 11 unequipped and in the Figure 12 shown equipped with accessories.
  • the suction plate 130 can be provided on its own or as part of a table saw, in particular one of the table saws 10, 20, 30 described above. This is expedient Suction plate 130 is arranged below the support section underside 14 and at least partially surrounds the saw blade 2.
  • the suction plate 130 includes a suction connection 131 to which a suction hose can be attached for sucking out dust generated during sawing.
  • the suction plate 130 comprises, on its side facing away from the saw blade 2, a first interface 141 for a replacement saw blade 142 as well as further interfaces for attaching accessory elements 135, in particular tools for assembling and dismantling the saw blade 2, 142 and the expansion wedge and/or riving knife 9 .
  • at least one accessory element 135 represents part of the first interface 141.
  • the function of the suction plate is expanded in such a way that the suction plate also serves as a replacement blade holder and is used to store the tools for assembling and dismantling the saw blade and the expansion wedge.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP21199058.5A 2019-01-14 2020-01-09 Tischsäge Active EP3960405B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102019200366.4A DE102019200366A1 (de) 2019-01-14 2019-01-14 Sägeblattabdeckung, Anschlagseinheit und Tischsäge
EP20700774.1A EP3820658B1 (de) 2019-01-14 2020-01-09 Tischsäge
PCT/EP2020/050384 WO2020148149A1 (de) 2019-01-14 2020-01-09 Tischsäge

Related Parent Applications (3)

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EP20700774.1A Division EP3820658B1 (de) 2019-01-14 2020-01-09 Tischsäge
EP20700774.1A Division-Into EP3820658B1 (de) 2019-01-14 2020-01-09 Tischsäge
PCT/EP2020/050384 Previously-Filed-Application WO2020148149A1 (de) 2019-01-14 2020-01-09 Tischsäge

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EP3960405A1 EP3960405A1 (de) 2022-03-02
EP3960405B1 true EP3960405B1 (de) 2023-10-25

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EP20700774.1A Active EP3820658B1 (de) 2019-01-14 2020-01-09 Tischsäge
EP20700462.3A Pending EP3911484A1 (de) 2019-01-14 2020-01-09 Sägeblattabdeckung und tischsäge
EP20700773.3A Pending EP3880418A2 (de) 2019-01-14 2020-01-09 Anschlageinheit und tischsäge
EP21199058.5A Active EP3960405B1 (de) 2019-01-14 2020-01-09 Tischsäge

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EP20700462.3A Pending EP3911484A1 (de) 2019-01-14 2020-01-09 Sägeblattabdeckung und tischsäge
EP20700773.3A Pending EP3880418A2 (de) 2019-01-14 2020-01-09 Anschlageinheit und tischsäge

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EP (4) EP3820658B1 (ja)
JP (3) JP7230214B2 (ja)
CN (3) CN113348060A (ja)
DE (1) DE102019200366A1 (ja)
DK (1) DK3960405T3 (ja)
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US11691311B2 (en) 2021-08-05 2023-07-04 Benjamin K. Watson Saw guard and methods of use thereof
USD1018614S1 (en) 2021-08-05 2024-03-19 Benjamin K. Watson Saw guard

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Publication number Publication date
CN113646146B (zh) 2023-06-09
US20210387373A1 (en) 2021-12-16
DE102019200366A1 (de) 2020-07-16
JP7230214B2 (ja) 2023-02-28
CN113348060A (zh) 2021-09-03
EP3960405A1 (de) 2022-03-02
FI3960405T3 (fi) 2024-01-08
US20220097249A1 (en) 2022-03-31
EP3911484A1 (de) 2021-11-24
EP3820658B1 (de) 2024-04-10
CN113646146A (zh) 2021-11-12
US11858167B2 (en) 2024-01-02
WO2020148148A2 (de) 2020-07-23
WO2020148149A1 (de) 2020-07-23
JP7233547B2 (ja) 2023-03-06
WO2020148148A3 (de) 2020-09-10
JP2022516267A (ja) 2022-02-25
US20210387374A1 (en) 2021-12-16
JP2022515676A (ja) 2022-02-21
EP3820658A1 (de) 2021-05-19
JP2022516527A (ja) 2022-02-28
CN113382833B (zh) 2023-08-01
EP3880418A2 (de) 2021-09-22
CN113382833A (zh) 2021-09-10
WO2020148146A1 (de) 2020-07-23
DK3960405T3 (da) 2024-01-08

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