EP1052073A2 - Plattensäge mit Antriebsvorrichtung für Anschläge in seitlicher und paralleler Anordnung zur Sägeblattebene - Google Patents

Plattensäge mit Antriebsvorrichtung für Anschläge in seitlicher und paralleler Anordnung zur Sägeblattebene Download PDF

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Publication number
EP1052073A2
EP1052073A2 EP00830333A EP00830333A EP1052073A2 EP 1052073 A2 EP1052073 A2 EP 1052073A2 EP 00830333 A EP00830333 A EP 00830333A EP 00830333 A EP00830333 A EP 00830333A EP 1052073 A2 EP1052073 A2 EP 1052073A2
Authority
EP
European Patent Office
Prior art keywords
stop
machine according
flexible
pulleys
geared motor
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.)
Withdrawn
Application number
EP00830333A
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English (en)
French (fr)
Other versions
EP1052073A3 (de
Inventor
Aureliano Pucci
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.)
SCM Group SpA
Original Assignee
SCM Group SpA
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 SCM Group SpA filed Critical SCM Group SpA
Publication of EP1052073A2 publication Critical patent/EP1052073A2/de
Publication of EP1052073A3 publication Critical patent/EP1052073A3/de
Withdrawn legal-status Critical Current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
    • 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
    • B27B27/02—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon arranged laterally and parallel with respect 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
    • B27B27/00—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon
    • B27B27/10—Devices for moving or adjusting the guide fences or stops

Definitions

  • the present invention relates to a disc saw machine of known type in the field of woodworking machinery, especially machines for working small lots of panels made of wood or similar materials, and relates in particular to a machine of this type equipped with a new system for driving the side reference stop of the panel to be cut, where the new system basically consists of a pulley and cable, belt or chain transmission unit which transmits drive from a motor to a side stop mounting unit, with a mechanical element between the two designed to limit the force transmitted.
  • Disc saw machines of this kind normally comprise a mobile work table (carriage) and/or a fixed work table for the panel to be cut, a disc saw blade normally lying in a vertical plane and located between the fixed and mobile work tables, a side reference stop for the panel that runs in suitable slideways so as to adjust to different panel widths, and accessories for detecting the position of the side stop, driving the side stop and clamping it in place.
  • known disc saw machines including machines made by the Applicant, may be basic, low-end machines where the side reference stop is moved manually by the operator. The operator pushes the stop or the stop supports and, with the aid of calibrated rules, reads off the current distance of the guide from the tool either directly or through an analog or digital display unit.
  • disc saw machines of known type may be more sophisticated, high-end machines where, instead of being manual, the stop is motor-driven by a system consisting of a gear and motor unit connected to a ball screw, the motor usually being fixed relative to the machine bed and the screw is attached to the means for supporting the mobile stop, so that the stop moves as the screw turns.
  • An encoder mounted on the motor detects the position of the stop on the basis of the turns of the motor.
  • the position controller follows the machine program's target dimension and forces the workpiece against the blade, causing it to jam, and, at the best of times, to stop the machine through an overload or other non-mechanical safety device built into the controller's electronic system.
  • the aim of the machine made according to the present invention is to overcome the above mentioned problems.
  • the invention as characterised in the claims, solves the problem of providing a machine with motor-driven stops, and therefore of higher class and utility than a manually-controlled machine, but using components that are more simple and economical than those used for machines with programmable stop control systems, and implementing the concept of open loop operation for the machine driver.
  • the invention disclosed herein accordingly provides a machine of the above mentioned type where operation of the stop occurs thanks to a kinematic chain connecting the geared motor to the stop supports and consisting of a system for transmitting motion between at least two co-planar pulleys - whose shafts are attached to the machine bed - and a flexible but inextensible element such as a cable, belt or chain closed in a loop around the pulleys, where the peripheries of the pulleys are coupled with the flexible element by friction or shape and where the transmission of motion between the stop support and the kinematic chain made in this way occurs thanks to the coupling of the stop support with the flexible element, and the transmission of motion between the geared motor and the kinematic chain occurs thanks to the coupling of the geared motor with one of the pulleys, called the drive pulley, where the kinematic chain for transmitting motion or the geared motor itself comprises mechanical means for limiting the transmissible force or torque.
  • the system may also comprise a linear position transducer, which directly measures the position of the stop relative to the tool or to the machine bed, and a digital display unit, for easy and accurate reading of the distance measured, these two components being connected in such a manner that operation occurs in open loop.
  • the main advantage of the present invention is that the kinematic chain is not only simple and economical but also practical and reliable, enabling the operator to accurately and easily position the stop with the aid of a motor. Moreover, the operator may remain on the same side of the machine, where the control panel is located, although the machine need not be equipped with a costly numerical control system or with one of the sophisticated ball screw drive systems normally found on the market. Yet another advantage is the direct stop position measuring system. Unlike other machines currently available on the market, the position of the stop is not detected through a device mounted on the geared motor which does not take into account the slack and elasticity of the kinematic chain leading to the stop but by a device that measures the actual position of the stop itself: this eliminates the drawbacks of the solutions known to prior art.
  • the disc saw machine is used to cut panels made of wood or similar materials.
  • the machine whose architecture and basic functions are substantially of known type, basically comprises: a stationary machine bed 4 that rests on the floor; a mobile table or carriage 2 that runs in a horizontal cutting feed direction X and that is designed to support and feed the panel 1 of thickness s; a fixed table 3 lying in the same plane as the carriage 2 and designed to support the panel 1; a disc saw blade 5 positioned vertically along the line separating the carriage 2 from the fixed table 3; and a stop 6 designed to reference the edge of the panel 1 and which is mounted on a support 7 that runs on the table 3 in a horizontal direction Y normal to X.
  • Figure 1 shows a kinematic chain 9 designed to drive the stop 6 and the related support 7 and consisting of a geared motor 10 that drives a drive pulley P1, whose shaft is at the far end, relative to the bed 4, of a slideway 8 for the support 7, positioned along Y and attached to the bed 4.
  • a drive pulley P1 whose shaft is at the far end, relative to the bed 4, of a slideway 8 for the support 7, positioned along Y and attached to the bed 4.
  • Another transmission pulley P2, lying in the same plane as pulley P1 is mounted with its shaft at the near end, relative to the bed 4, of the same slideway 8.
  • a steel cable 14 is stretched in a loop around the two pulleys in such a way as to transmit motion thanks to the friction created between the cable and the peripheries of the pulleys.
  • the stop 6 is attached to its support 7 that runs in the slideway 8 in the Y direction. As illustrated, the support 7 is connected to the cable 14 by two end heads applied to the ends of the cable and used to secure the cable in appropriate slots made in the support 7. Cable tension is controlled by conventional spring tensioners 16.
  • the position of the stop 6, which is referenced to the home position of the tool 5, is measured by a position transducer 11 comprising a transduction element lla of magnetic linear type and operating at the interface between the support 7 and a magnetic rule built into the table 3 and positioned in the Y direction.
  • the output signal is applied to a display unit 12 in a form which can be read by the operator.
  • a control 13 for example a spring-return pushbutton, used to drive the motor so as to move the stop 6 until the reading on the display unit 12 corresponds to the position required by the operator.
  • Means 18 are also envisaged for stopping the support 7 in the slideway 8. These means may be manual, of the cam type, or pneumatic, acting on the control 13 that operates the geared motor 10.
  • the purely mechanical means 15 for limiting the transmissible force come into operation, this being one of the characteristic features of the invention.
  • the limiting means are constituted by the assembly formed by the pulley P1, cable 14 and tensioner 16, where the limitation is achieved by causing the cable to slip on the pulley P1.
  • the geared motor 10 may be equipped with a mechanical clutch 17b or the cable (now uninterrupted) may be passed through an adjustable clamp 17a designed to allow slipping when the force transmitted exceeds a preset limit.
  • a machine made in this way achieves the above mentioned aims, thanks to a simple stop drive unit, without having to alter the existing machine structure completely.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP00830333A 1999-05-07 2000-05-05 Plattensäge mit Antriebsvorrichtung für Anschläge in seitlicher und paralleler Anordnung zur Sägeblattebene Withdrawn EP1052073A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRN990014U 1999-05-07
ITRN990014 IT248719Y1 (it) 1999-05-07 1999-05-07 Macchina segatrice a disco per la lavorazione di pannelli con nuova movimentazione per elementi di riferimento laterali.

Publications (2)

Publication Number Publication Date
EP1052073A2 true EP1052073A2 (de) 2000-11-15
EP1052073A3 EP1052073A3 (de) 2004-01-21

Family

ID=11407243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830333A Withdrawn EP1052073A3 (de) 1999-05-07 2000-05-05 Plattensäge mit Antriebsvorrichtung für Anschläge in seitlicher und paralleler Anordnung zur Sägeblattebene

Country Status (2)

Country Link
EP (1) EP1052073A3 (de)
IT (1) IT248719Y1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1157778A2 (de) * 2000-05-24 2001-11-28 Precision Automation, Inc. System zur Kupplung einer Steuereinrichtung und der Führungsschiene eines Sägetisches
EP3957423A1 (de) * 2020-08-19 2022-02-23 Otto Martin Maschinenbau GmbH & Co. KG Sicherheitsarchitektur für holzbearbeitungsmaschinen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB911301A (en) * 1959-01-15 1962-11-21 Harrison Mcgregor & Guest Ltd An over-running clutch for belt drives
US4018096A (en) * 1975-07-25 1977-04-19 Franklin Manufacturing Company Slipping belt clutch
EP0057469A2 (de) * 1981-02-04 1982-08-11 Okoma Oberkochener Maschinen Gmbh Anschlagvorrichtung für Holzbearbeitungsmaschinen
US5070485A (en) * 1990-09-28 1991-12-03 Mts Systems Corporation Low power magnetostrictive sensor
US5251142A (en) * 1990-12-14 1993-10-05 Digital Cutting Systems, Inc. Rip fence of table saw which may be positioned by computer control
DE4329967A1 (de) * 1992-09-08 1994-03-10 Schneeberger Holztechnik Ag Ro Bearbeitungsmaschine mit einer Positioniervorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB911301A (en) * 1959-01-15 1962-11-21 Harrison Mcgregor & Guest Ltd An over-running clutch for belt drives
US4018096A (en) * 1975-07-25 1977-04-19 Franklin Manufacturing Company Slipping belt clutch
EP0057469A2 (de) * 1981-02-04 1982-08-11 Okoma Oberkochener Maschinen Gmbh Anschlagvorrichtung für Holzbearbeitungsmaschinen
US5070485A (en) * 1990-09-28 1991-12-03 Mts Systems Corporation Low power magnetostrictive sensor
US5251142A (en) * 1990-12-14 1993-10-05 Digital Cutting Systems, Inc. Rip fence of table saw which may be positioned by computer control
DE4329967A1 (de) * 1992-09-08 1994-03-10 Schneeberger Holztechnik Ag Ro Bearbeitungsmaschine mit einer Positioniervorrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1157778A2 (de) * 2000-05-24 2001-11-28 Precision Automation, Inc. System zur Kupplung einer Steuereinrichtung und der Führungsschiene eines Sägetisches
EP1157778A3 (de) * 2000-05-24 2003-03-05 Precision Automation, Inc. System zur Kupplung einer Steuereinrichtung und der Führungsschiene eines Sägetisches
EP3957423A1 (de) * 2020-08-19 2022-02-23 Otto Martin Maschinenbau GmbH & Co. KG Sicherheitsarchitektur für holzbearbeitungsmaschinen

Also Published As

Publication number Publication date
EP1052073A3 (de) 2004-01-21
ITRN990014U1 (it) 2000-11-07
IT248719Y1 (it) 2003-02-12

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