EP0570605B1 - Dispositif protecteur pour raboteuse - Google Patents

Dispositif protecteur pour raboteuse Download PDF

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Publication number
EP0570605B1
EP0570605B1 EP92108301A EP92108301A EP0570605B1 EP 0570605 B1 EP0570605 B1 EP 0570605B1 EP 92108301 A EP92108301 A EP 92108301A EP 92108301 A EP92108301 A EP 92108301A EP 0570605 B1 EP0570605 B1 EP 0570605B1
Authority
EP
European Patent Office
Prior art keywords
cover strip
guard according
spring
gas spring
carrier
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.)
Expired - Lifetime
Application number
EP92108301A
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German (de)
English (en)
Other versions
EP0570605B2 (fr
EP0570605A1 (fr
Inventor
Hans Leupi
Hansjürg Wirz
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.)
SCHWEIZERISCHE UNFALLVERSICHERUNGSANSTALT SUVA
Original Assignee
SCHWEIZERISCHE UNFALLVERSICHERUNGSANSTALT SUVA
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Application filed by SCHWEIZERISCHE UNFALLVERSICHERUNGSANSTALT SUVA filed Critical SCHWEIZERISCHE UNFALLVERSICHERUNGSANSTALT SUVA
Priority to EP92108301A priority Critical patent/EP0570605B2/fr
Priority to DE59203301T priority patent/DE59203301D1/de
Priority to AT92108301T priority patent/ATE126471T1/de
Publication of EP0570605A1 publication Critical patent/EP0570605A1/fr
Application granted granted Critical
Publication of EP0570605B1 publication Critical patent/EP0570605B1/fr
Publication of EP0570605B2 publication Critical patent/EP0570605B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B27G21/00—Safety guards or devices specially designed for other wood-working machines auxiliary devices facilitating proper operation of said wood-working machines

Definitions

  • the invention relates to a protective device for planing machines for joining and dressing wooden workpieces with an organ for covering the knife shaft, which is attached to one side of the machine bed and is made of a cover strip, which acts on a support plate against one acting in the direction of a joining stop Pressure force is horizontally displaceable.
  • Planer protection devices are known in which the organ for covering the knife shaft is attached to a support head which is pivotally attached to one side of the machine bed via a lever linkage.
  • the cover element can be raised so that the workpiece can be pushed through.
  • the covering member is removed from the joining stop via the lever linkage, so that the workpiece can be carried out between the end of the covering member and the joining stop; a pressing force of the covering member on the workpiece is applied by hand. After the workpiece has been pushed through between the joining stop and the end of the covering member, it remains in its position remote from the joining stop, so that the part of the knife shaft which is exposed there is not covered.
  • a protective device of the type described at the outset is described and illustrated in US-A 1 630 671.
  • the cover strip is moved in the direction of the joining stop with the aid of a weight via a deflection chain.
  • the cover strip must be set vertically so that the workpiece can be pushed through for dressing.
  • an adjusting screw is provided, which clamps a vertical rod, which projects downward from the support plate, at the required height.
  • a minimum height must be set before each dressing process, which is slightly larger than the height of the workpiece, which is cumbersome and time-consuming for different workpieces to be machined one after the other.
  • the latter does not exert any pressure on the workpiece from above.
  • EP-A 85 636 is a planer protection device with a cover strip which is attached to a telescopic device with a compression spring. After each downward movement, the spring presses the cover strip back into a rest position, which is defined by the angular setting of a cam, against which a lever hinged to the cover strip strikes.
  • the cover strip can only be raised above the set rest position, for example for dressing thicker workpieces, by rotating the stop cam. Since a free lifting of the stop bar beyond the set stop is not possible, it cannot exert any vertical pressure on the workpiece to be dressed.
  • the invention has for its object to provide a planer protection device in which the cover strip ensures perfect coverage of the knife shaft in any position and exerts the contact pressure required for machining in both the horizontal and vertical directions.
  • the support plate is attached to a lifting device, which is connected to a tracking device for automatic return of the cover strip both from above and from below into an adjustable rest position above the knife shaft.
  • the cover strip can thus be set in a vertical rest position from which it can be freely lifted upwards in order to press its weight vertically onto the workpiece during the subsequent dressing or to offer the possibility of dressing a thicker workpiece.
  • the cover strip can be pressed down from the selected rest position, for example by a workpiece that is pulled back over the cover strip after dressing; then it automatically returns to its rest position.
  • the tracking device for the vertical adjustment upwards can have, for example, a gas spring or a helical spring.
  • four guide rollers lying opposite one another in pairs are mounted on the support plate, between which the cover strip is held displaceably in the direction of its longitudinal axis.
  • the guide rollers ensure a tilt-free longitudinal displacement of the cover strip.
  • the lifting device is connected to a weight relief device for the cover strip, so that only a fraction of the total weight has to be moved by hand when the cover strip is raised.
  • the weight relief device can have a mainspring with adjustable preload, but it can also consist of a gas spring.
  • the lifting device has two vertical rods which are mounted in ball guide bushes attached to the carrier and are connected via a cable to the mainspring attached to the carrier for weight relief.
  • the ball guide bushes ensure trouble-free height adjustment of the cover strip without the risk of jamming or jamming.
  • the mainspring for the weight relief is attached to the carrier and can be accommodated in a housing that takes up little space and enables a compact design.
  • the lifting device has a slide which is mounted on guide rails attached to the carrier via guide rollers, the gas spring acting on the carrier on the one hand and on the slide on the other hand to relieve weight.
  • the cylinder housing of the height-adjustable gas spring can be connected in an articulated manner with its upper end to a lifting lever which is pivotably mounted on the carrier and on whose free end the support plate is supported.
  • the piston rod of this gas spring is articulated with its downward-facing end on a slide plate which is arranged in a guide rail of the carrier so as to be vertically displaceable and lockable.
  • the piston rod of the height-adjustable gas spring is supported with its downward-pointing end on the carrier, while the housing of the gas spring is displaceable relative to the carriage and can be fixed thereon.
  • a support plate is provided for the guide member of the cover strip, it is possible to attach it to a swivel arm which serves as a lifting device and is attached to one side of the machine bed. This simplifies the conversion of planing machines already in use that are already equipped with a swivel arm.
  • the swivel arm receives the gas spring for generating the pressing force, which has a deflecting roller for a cable at the free end of its piston rod, which is guided over other deflecting pulleys in the manner of a pulley block and fastened on the one hand to the swivel arm and on the other hand to the cover strip is.
  • the gas spring for generating the pressing force, which has a deflecting roller for a cable at the free end of its piston rod, which is guided over other deflecting pulleys in the manner of a pulley block and fastened on the one hand to the swivel arm and on the other hand to the cover strip is.
  • the free end of the cover strip pointing towards the joining stop carries a pressure shoe from which an inlet beak protrudes which lies in a plane running parallel to the work table and forms an acute angle with the joining stop.
  • the inlet beak facilitates the feeding of the workpiece when joining, since this gradually moves the pressure shoe and with it the cover strip against the pressing force away from the joining stop until the required gap width for pushing through the workpiece is reached.
  • the inlet beak in the pressure shoe can be pivoted about a horizontal axis lying transverse to the longitudinal axis of the cover strip into a position rotated by 90, in which it protrudes upward from the work table. In this position, rotated by 90, the upward-inclined inlet beak facilitates the feeding of workpieces for dressing work.
  • the workpieces press against the underside of the upward-facing infeed beak and raise it, and with it the cover strip connected to it, until the required gap height for pushing through the workpiece is reached.
  • the cover strip is interrupted in its central region by a hinge, by means of which the rear part of the cover strip pointing away from the joining stop can be folded down. It is advantageous if the hinge has a locking element for locking the rear part of the cover strip in a horizontal position in alignment with the front part.
  • a drive spring, a gas spring or an electronically controlled motor can be provided to generate the pressure force on the cover strip.
  • the cover strip When a drive spring is used to generate the pressing force, it is advantageously attached to the support plate and connected to the cover strip via a cable. It is advantageous if the cover strip carries a lockable stop element which is displaceable in the direction of its longitudinal axis and on which the cable pull acts.
  • the horizontal adjustment path of the stop bar in the direction of the joining stop can be adjusted via the stop element, both when using only the front partial area of the cover bar with the rear part folded down and over the entire area of the cover bar. In this way, when performing dressing work, it is possible to leave a small gap between the free end of the cover strip and the joining stop, so that frictional contact between the end of the covering strip and the joining stop is avoided.
  • FIGS. 1 to 15 shows a top view of the preferred embodiment of the protective device according to the invention.
  • a carrier 14 is fastened to the longitudinal side 10 of the machine bed of a planing machine facing the operator, the work table of which is indicated by 12.
  • a lifting device 18 is attached, which in the exemplary embodiment of FIGS. 1 to 15 has two vertical rods 20 which are connected to one another at the lower end by a horizontal plate 22.
  • the two rods 20 are vertically displaceably mounted in ball guide bushes 24 which are fastened to the side wall 16 of the carrier 14.
  • a horizontal support plate 26 is fastened to the upper ends of the two rods 20 and is thus part of the lifting device 18 is.
  • cover strip 30 On the support plate 26 are four pairs of guide rollers 28 opposite each other with a vertical axis of rotation, between which a cover strip 30 is held in the direction of its longitudinal axis 32.
  • the arrangement is such that the cover strip 30 lies in a manner known per se centrally over a knife shaft 34, which is indicated in FIG. 6.
  • the longitudinal axis 32 of the cover strip 30 runs parallel to the axis of rotation of the cutter shaft 34.
  • the free end of the cover strip 30 (see FIG. 4) facing a joining stop 36 of the planing machine carries a pressure shoe 38.
  • An inlet spout 40 protrudes from the pressure shoe 38, which in the position shown in FIGS Workbench 12 is level and forms an acute angle a with the joining stop 36.
  • the inlet beak 40 is pivotably mounted in the pressure shoe 38 by means of a bolt 42 about a horizontal axis 44 lying transversely to the longitudinal axis 32 of the cover strip 30.
  • the inlet beak 40 has a handle recess 46 so that it can be swiveled by hand from its joining position shown in FIGS. 4 and 5 against the force of a compression spring 50 by 90 ° into the position of FIGS.
  • the inlet beak 40 is locked on the pressure shoe 38 by a not shown locking element.
  • the inlet beak 40 protrudes upward from the work table 12 and forms the angle a with it, so that a workpiece 46 can be inserted for dressing.
  • the inlet beak 40 consists of a material that is harder than the material of the pressure shoe 38. This ensures that premature wear of the inlet beak 40 is prevented, while the sliding movements on the pressure shoe 38 are favored due to the softer material.
  • the cover strip 30 exerts a pressing force on the workpiece 46 via its pressure shoe 38 and thereby presses it against the joining stop 36.
  • the pressing force is generated by a drive spring 52, which has the shape of a spiral spring.
  • the drive spring 52 is fastened at one end to a bolt 54 which is screwed to the support plate 26 below the cover strip 30.
  • the other end of the mainspring 52 is attached to the inside of a cylindrical housing 56 which can be rotated to adjust the bias of the mainspring 52.
  • an annular groove 58 is machined, in which a cable 60 is wound, the free end of which, according to FIG. 1, is guided centrally via a deflection roller 62 to a stop element 64, to which it is attached.
  • the stop element 64 consists of two clamping jaws 66 which grip around the cover strip 30 on its two longitudinal sides.
  • the two clamping jaws 66 sit on a common support bolt 68, the right end of which is designed as a handle 70 in FIGS. 11 and 12.
  • An arm 72 of a release lever 74 engages between the two opposite ends of the clamping jaws 66; the arm 72 is pivotally mounted on the support bolt 68 by means of a pin 76. If the release lever 74 is pressed by hand against the handle 70 from the clamping position of the stop element 64 shown in FIG. 11, the arm 72 according to FIG.
  • the drive spring 52 and the adjustable stop element 64 cause the cover strip 30 to be automatically moved back into the position in which the knife shaft 34 is covered to the maximum after each horizontal displacement when joining.
  • the mainspring 52 takes on the task of exerting the required pressing force on the workpiece 46 in the direction of the joining stop 36.
  • FIGS. 13 to 15 show a cutout of the central area of the cover strip 30, which is interrupted here by a hinge 80.
  • the rear part 30 "of the cover strip 30 pointing away from the joining stop 36 can be folded downward via this hinge 80 (cf. FIG. 15).
  • a locking element 82 is located on the rear part 30" of the cover strip 30 in the direction of the longitudinal axis 32 the cover strip 30 slidably mounted against the force of a compression spring 84.
  • a depression 86 into which a finger can engage.
  • the end of the locking member 82 facing the front part 30 'of the cover strip 30 is designed as a nose 88 which engages over an inclined surface 90 at the opposite end of the front part 30' of the cover strip 30 when the rear part 30 "is locked to the front part 30 ' (see figure 14).
  • the two-part design of the cover strip 30 has the advantage that the rear part 30 "can be folded down if only a narrow working area has to be covered over the knife shaft 34. This prevents the rear part 30" of the cover strip 30 from being too wide protrudes beyond the work table 12. If a wider working area has to be covered over the knife shaft 34, the rear part 30 "is folded up and locked in alignment with the front part 30 'by means of the locking element 82. The stop element 64 shown in FIGS. 11 and 12 can then also be used in the rear part 30 "of the cover strip 30 are moved.
  • the hinge can be constructed in such a way that it can be removed, for example to assemble the cover strip 30 from more than two parts of the same length, which are identical to one another.
  • the hinge can be constructed in such a way that it can be removed, for example to assemble the cover strip 30 from more than two parts of the same length, which are identical to one another.
  • the cover strip 30 can be raised a certain dimension, generally 75 mm, above the work table 12, which is indicated by dash-dotted lines in FIG. 3.
  • a weight relief device is provided.
  • this consists of a drive spring 92 designed in the manner of a spiral spring, the inner end of which is fastened to a bolt 94 which is attached in a cylindrical housing part 96 of the wall 16.
  • the housing part 96 is closed by a cover 98 and lies between the two vertical rods 20.
  • the outer end of the mainspring 92 is fastened in a housing 100 which can be rotated to adjust the spring preload and thus the weight relief.
  • annular groove 102 On the outer circumference of the cylindrical housing 100 there is an annular groove 102, in which a cable 104 is wound, the free end of which is guided centrally via a deflection roller 106 mounted on the side wall 16 of the carrier 14 to the plate 22, which is the lower ends of the two rods 20 connects together.
  • the end of the cable pull 104 is fixed there.
  • a lifting lever 110 acting as a reinforcement lever, is pivotably mounted on the carrier 14 via a bolt 108, which lever swivels in the vicinity of its horizontal pivot axis formed by the bolt 108 about an axis 112 parallel to this upper end of the housing 114 is connected to a gas spring 116.
  • a roller 118 is attached which, as shown in FIGS. 1 and 2, projects laterally from the lifting lever 110 and is supported on the underside of the support plate 26.
  • the lower end of the piston rod 120 of the gas spring 116 is articulated on a lateral projection 122 of a sliding plate 124 which extends in the vertical direction and is arranged so as to be vertically displaceable in a guide rail 126 of the carrier 14.
  • the height-adjustable sliding plate 124 can be clamped in its guide rail 126, for which purpose a clamping lever 128 is used, the threaded bolt of which extends through vertical elongated holes 130 in the guide rail 126.
  • the compression spring 134 is placed on a vertical pin 136 and is supported with its lower end on the carrier 14.
  • the gas spring 116 is part of a tracking device for the lifting device 18, which allows the support plate 26 and thus the cover strip 30 to be adjusted vertically by 75 mm. If dressing work is to be carried out, the cover strip 30 can be raised to a desired height by hand.
  • the clamping lever 128 is released, the compression spring 134 presses the slide plate 124 upward, so that the gas spring 116 is carried along.
  • the housing 114 presses against the underside of the support plate 26 via the lifting lever 110 and the roller 118, the piston rod 120 of the gas spring 116 being fully extended. In the desired height position of the support plate 26, the slide plate 124 is then blocked in the guide rail 126 by means of the clamping lever 128.
  • the lifting device for the support plate 26 and the cover strip 30 which can be moved thereon consists of a slide 138 which is connected to the support plate 26 via a bracket 140.
  • the carriage 138 is mounted on four vertically arranged guide rollers 142 on a vertically arranged guide rail 144, which can be fastened to the longitudinal side 10 of the work table 12 via a spacer plate 146 forming the carrier 14.
  • a handle 148 protrudes laterally from the carriage 138, which allows the support plate 26 with the cover strip 30 to be lifted or lowered with ease.
  • the weight relief device in this variant of the invention has no mainspring, but a gas spring 150, the piston rod of which is attached with its lower end to the guide rail 144, while the upper end of the housing of the gas spring 150 is connected to the slide 138.
  • the gas spring 116 which is part of the tracking device for the lifting device 18, is accommodated between the guide rail 144 and the slide 138 in addition to the gas spring 150.
  • the piston rod 120 of this gas spring 116 is supported with its downward-facing end on a stop 152 which protrudes from the guide rail 144.
  • the housing 114 of the gas spring 116 is freely movable in height and can be adjusted relative to the slide 138.
  • the support plate 26 with the cover strip 30 mounted thereon can also be raised in order to carry out dressing work.
  • the slide 138 is moved vertically by means of the handle 148, in order then to be fixed in the desired position on the housing 114 of the gas spring 116.
  • a cuff 154 which surrounds the housing 114 is used for this purpose.
  • a clamping lever 164 is used, which lies below the handle 148 and can be gripped together with it.
  • the clamping lever 164 is released, so that the adjusting bolt 160 is pressed back into its rest position via the plate springs 162.
  • the two balls 156 thus also return to their starting position, so that the sleeve 154 then clamps the housing 114.
  • FIGS. 21 to 28 show a further variant of the invention, in which the support plate 26 is fastened with the cover strip 30 to a swivel arm 166.
  • the swivel arm 166 consists of a rectangular hollow profile body, the end of which points away from the support plate 26 is pivotably mounted on an axis 168 fastened to the side wall 10 of the work table 12.
  • the axis 168 has a cutout 170 into which a locking bolt 172 which is resiliently mounted in the direction of its axis engages.
  • the maximum swivel angle for the swivel arm 166 is specified, which is indicated in FIG. 22.
  • the dot-dash position of the swivel arm 166 corresponds to a vertical adjustment of the cover strip 30 by 75 mm.
  • the locking pin 172 can be brought out of engagement with the recess 170 by means of a handle 174 attached to it, so that the pivot arm 166 can then be pivoted away, for example when the knife shaft 34 has to be replaced.
  • actuating lever 176 To rotate the swivel arm 166, it is connected to an actuating lever 176, the angular position of which is adjustable.
  • the end of the actuating bracket 176 located near the axis 168 is fixedly connected to a support plate 178 which is pressed by a lock nut 180 against a friction disk 182 which in turn rests on a driving disk 184 which is fixed to the axle via a pin 186 168 is connected.
  • the lock nut 180 is tightened so tight that the friction is large enough to leave the operating lever 176 in any desired angular position in order to change the height setting of the support plate 26 and thus the cover strip 30.
  • a helical spring 188 presses a contact bolt 190 against a driver element 192.
  • a vertical gap remains between the cover strip 30 and the cutter shaft 34, so that the workpiece can be pushed through.
  • the cover strip 30 is pressed downward, specifically against the force of the spring 188, which then pushes the swivel arm 166 back upwards into its set angular position.
  • a gas spring 194 is installed in the swivel arm 166 in this exemplary embodiment.
  • the free end of the piston rod 196 of the gas spring 194 carries an axis 198 on which a deflecting roller 200 can be rotated on each side of the gas spring 194 is stored.
  • one end 60 ′ of the cable pull 60 is clamped in this, which is indicated in FIGS. 21 and 23.
  • the cable pull 60 is guided via the deflecting roller 200 'to a deflecting roller 202 which is mounted within the swivel arm 166 and whose axis is perpendicular to the axis 198 of the two deflecting rollers 200.
  • the cable pull 60 runs back over the deflection roller 202 to the second deflection roller 200 ′′ and then back through a connecting channel 204 to a deflection roller 206 which is mounted on the support plate 26.
  • the other end 60 ′′ of the cable pull 60 is in one by means of a clamping screw 208 Stop element 210 clamped, which in turn is extensively connected to the cover strip 30 and serves as an end stop for the cover strip 30.
  • the cover strip 30 can be adjusted four times, the pressure force of the gas spring 194 a quarter of the pressing force of the cover strip 30 and thus the pressure shoe 38 is reduced.
  • FIGS. 21 to 28 with swivel arm 166 is also suitable for surface planing and thicknessing machines which are combined with a milling cutter and circular saw, since the planing protection device can be swiveled below the table level.
  • FIG. 29 indicates the possibility of generating the pressing force for the cover strip 30 by means of an electronically controlled stepper motor 212, which is connected to the cover strip 30 via a rack or the like, not shown.
  • the motor 212 moves the cover strip 30 to the joining stop 36 for joining a workpiece 48 and then returns about 1 mm.
  • the workpiece 48 to be joined triggers an opening movement of the cover strip 30 until the workpiece thickness shown in dashed lines is reached. In regular time units, e.g. B. every two seconds, this joining position is checked. This prevents a manual displacement of the joining stop 36 from causing an incorrect and dangerous position of the cover strip 30.
  • the movement of the cover strip 30 is recognized by the motor 212 and a pressing force of approximately 25 N is used. The force in setting the initial position may be less to allow faster initial setting.
  • the cover strip 30 can be pre-positioned. This pre-positioning can be saved. In order to ensure a safe working environment, the cover strip 30 can be removed after a certain time, e.g. after 20 seconds without machining the workpiece, close fully. This pre-positioning can be resumed when a switch is actuated.
  • the cover strip 30 is also moved in the direction of the joining stop 36 via the motor 212, in order then to move back by approximately 1 mm.
  • the dressing position is checked every two seconds to prevent manual displacement of the joining stop 36 from resulting in an incorrect and dangerous position of the cover strip 30.
  • the variant explained in FIG. 29 for setting the cover strip 30 by means of an electric motor 212, which also exerts the required pressing force, has various advantages.
  • the width of the workpiece 48 is determined via the position of the cover strip 30 by monitoring the generated voltage and the current consumption on the electric motor.
  • the cover strip 30 can be used according to the invention.
  • a mechanical spring mainspring or spiral spring
  • a gas spring each with a predetermined spring constant
  • a programmable spring is available which emits a reduced force in a specific position or with a specific force or when a workpiece 48 is introduced.
  • an “intelligent” spring available that can "remember” a certain position and after a certain period of time without work covers the dangerous areas above the knife shaft 34. The work can be resumed quickly due to the saved position.
  • the motorized solution can be provided in an analogous manner for the vertical movement drive of the cover strip 30.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Switches With Compound Operations (AREA)
  • Soil Working Implements (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Claims (28)

1. Dispositif protecteur pour raboteuses destinées à dresser et à dégauchir des pièces en bois, ledit dispositif protecteur comprenant un organe qui est conçu pour recouvrir l'arbre porte-lames (34), qui est monté sur un côté du banc avec possibilité de déplacement en hauteur et qui est constitué d'une barrette de recouvrement (30) montée sur une plaque porteuse (26) avec possibilité de déplacement horizontal à l'encontre d'une force d'appui agissant en direction d'une butée de dressage (36), caractérisé en ce que la plaque porteuse (26) est montée sur un dispositif de levage (18) qui est relié à un dispositif de rappel destiné à ramener automatiquement la barrette de recouvrement (30), aussi bien d'en haut que d'en bas, dans une position de repos réglable au-dessus de l'arbre porte-lames (34).
2. Dispositif protecteur selon la revendication 1, caractérisé en ce que le dispositif de rappel comporte un ressort à gaz (116) à déplacement vertical qui prend appui sur un support (14) destiné au montage du dispositif de levage (18).
3. Dispositif protecteur selon la revendication 1 ou 2, caractérisé en ce que, sur la plaque porteuse (26) sont montés quatre galets de guidage (28) qui sont opposés par paires et entre lesquels la barrette de recouvrement (30) est maintenue avec possibilité de déplacement dans le sens de son axe longitudinal (32).
4. Dispositif protecteur selon l'une des revendications précédentes, caractérisé en ce que le dispositif de levage (18) est relié à un dispositif d'allègement de la barrette de recouvrement (30).
5. Dispositif protecteur selon la revendication 4, caractérisé en ce que le dispositif d'allègement comporte un ressort-moteur (92) à prétension réglable.
6. Dispositif protecteur selon la revendication 4, caractérisé en ce que le dispositif d'allègement comporte un ressort à gaz (150).
7. Dispositif protecteur selon la revendication 4, caractérisé en ce que le dispositif d'allègement comporte un moteur pas à pas à commande électronique.
8. Dispositif protecteur selon la revendication 5, caractérisé en ce que le dispositif de levage (18) comporte deux tiges verticales (20) qui sont logées dans des douilles de guidage à billes (24) montées sur le support (14) et qui sont reliées par un câble (104) au ressort-moteur (92) d'allègement fixé au support (14).
9. Dispositif protecteur selon la revendication 6, caractérisé en ce que le dispositif de levage (18) comporte un chariot (138) qui, par l'intermédiaire de galets de guidage (142), est monté sur un rail de guidage (144) fixé au support (14), le ressort à gaz (150) d'allègement agissant d'une part sur le support (14) et d'autre part sur le chariot (138).
10. Dispositif protecteur selon les revendications 8 et 9, caractérisé en ce que l'extrémité supérieure d'un boîtier (114) du ressort à gaz (116) réglable en hauteur est reliée de manière articulée à un levier de levage (110) qui est monté de manière pivotante sur le support (14) et à l'extrémité libre duquel prend appui la plaque porteuse (26).
11. Dispositif protecteur selon la revendication 10, caractérisé en ce que l'extrémité, tournée vers le bas, d'une tige de piston (120) du ressort à gaz (116) est articulée sur une plaque coulissante (124) qui est montée, avec possibilité de déplacement vertical et de blocage, dans un rail de guidage (126) du support (14).
12. Dispositif protecteur selon la revendication 11, caractérisé en ce qu'un ressort de pression (134) agit sur l'extrémité inférieure de la plaque coulissante (124).
13. Dispositif protecteur selon la revendication 11 ou 12, caractérisé en ce que l'extrémité, tournée vers le bas, de la tige de piston (120) du ressort à gaz (116) réglable en hauteur prend appui sur le support (14) tandis que le boîtier (114) du ressort à gaz (116) peut se déplacer par rapport au chariot (138) et peut y être immobilisé.
14. Dispositif protecteur selon la revendication 4, caractérisé en ce que le dispositif de levage (18) est constitué par un bras pivotant (166).
15. Dispositif protecteur selon la revendication 14, caractérisé en ce que le bras pivotant (166) entoure un ressort à gaz (194) qui produit la force d'appui et qui, à l'extrémité libre de sa tige de piston (196), comporte au moins une poulie de renvoi (200) destinée à un câble (60) qui passe autour d'autres poulies de renvoi (202, 206) à la manière d'un moufle et est fixé d'une part au bras pivotant (166) et d'autre part à la barrette de recouvrement (30).
16. Dispositif protecteur selon la revendication 14 ou 15, caractérisé en ce que le bras pivotant (166) est relié au levier d'actionnement (176) de manière réglable.
17. Dispositif protecteur selon la revendication 16, caractérisé en ce que le dispositif de rappel comporte un ressort hélicoïdal (188) monté dans le bras pivotant (166).
18. Dispositif protecteur selon l'une des revendications précédentes, caractérisé en ce que l'extrémité libre de la barrette de recouvrement (30) tournée vers la butée de dressage (36) porte un sabot de pression (38), duquel dépasse un bec d'insertion (40) qui se trouve dans un plan (12) parallèle à la table de travail (12) et qui forme un angle aigu (a) avec la butée de dressage (36).
19. Dispositif protecteur selon la revendication 18, caractérisé en ce que le bec d'insertion (40) du sabot de pression (38) peut pivoter autour d'un axe (44) horizontal transversal à l'axe longitudinal (32) de la barrette de recouvrement (30), dans une position tournée de 90 et dans laquelle il dépasse de la table de travail (12) vers le haut.
20. Dispositif protecteur selon la revendication 18 ou 19, caractérisé en ce que le bec d'insertion (40) est réalisé dans un matériau plus dur que le matériau du sabot de pression (38).
21. Dispositif protecteur selon l'une des revendications précédentes, caractérisé en ce que la barrette de recouvrement (30) est interrompue dans sa zone centrale par une charnière (80) qui permet de rabattre vers le bas la partie arrière (30") de la barrette de recouvrement (30) opposée à la butée de dressage (36).
22. Dispositif protecteur selon la revendication 21, caractérisé en ce qu'à la charnière (80) est associé un organe de blocage (82) pour verrouiller la partie arrière (30") de la barrette de recouvrement (30) dans une position horizontale alignée avec la partie avant (30').
23. Dispositif protecteur selon l'une des revendications précédentes, caractérisé en ce que, pour exercer la force d'appui sur la barrette de recouvrement (30), il est prévu un ressort-moteur (52).
24. Dispositif protecteur selon l'une des revendications 1 à 22, caractérisé en ce que, pour exercer la force d'appui sur la barrette de recouvrement (30), il est prévu un ressort à gaz (194).
25. Dispositif protecteur selon l'une des revendications 1 à 22, caractérisé en ce que, pour exercer la force d'appui sur la barrette de recouvrement (30), il est prévu un moteur pas à pas (212) à commande électronique.
26. Dispositif protecteur selon la revendication 23, caractérisé en ce que le ressort-moteur (52) est monté sur la plaque porteuse (26) et relié à la barrette de recouvrement (30) par un câble (60).
27. Dispositif protecteur selon la revendication 26, caractérisé en ce que la barrette de recouvrement (30) porte un élément réglable formant butée (64) qui est déplaçable dans le sens de son axe longitudinal (32) et sur lequel agit le câble (60).
28. Dispositif protecteur selon la revendication 27, caractérisé en ce que l'élément formant butée (64) est constitué de deux mâchoires de serrage (66) qui entourent la barrette de recouvrement (30) au niveau de ses deux côtés longitudinaux et qui reposent sur un goujon porteur commun (68), sur lequel elles peuvent adopter, à l'encontre de la force d'éléments élastiques (78), une position non bloquante à l'aide d'un levier de desserrage (74).
EP92108301A 1992-05-16 1992-05-16 Dispositif protecteur pour raboteuse Expired - Lifetime EP0570605B2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP92108301A EP0570605B2 (fr) 1992-05-16 1992-05-16 Dispositif protecteur pour raboteuse
DE59203301T DE59203301D1 (de) 1992-05-16 1992-05-16 Hobelschutzeinrichtung.
AT92108301T ATE126471T1 (de) 1992-05-16 1992-05-16 Hobelschutzeinrichtung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92108301A EP0570605B2 (fr) 1992-05-16 1992-05-16 Dispositif protecteur pour raboteuse

Publications (3)

Publication Number Publication Date
EP0570605A1 EP0570605A1 (fr) 1993-11-24
EP0570605B1 true EP0570605B1 (fr) 1995-08-16
EP0570605B2 EP0570605B2 (fr) 2002-04-24

Family

ID=8209624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92108301A Expired - Lifetime EP0570605B2 (fr) 1992-05-16 1992-05-16 Dispositif protecteur pour raboteuse

Country Status (3)

Country Link
EP (1) EP0570605B2 (fr)
AT (1) ATE126471T1 (fr)
DE (1) DE59203301D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT1593U1 (de) * 1996-09-27 1997-08-25 Hinkel Maschinenbau Schutzvorrichtung für ein rotierendes werkzeug einer bearbeitungsmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60707C (de) * Firma DÜSSELDORFER EISENBAHNBEDARF, VORM. CARL WEYER & CO., AKTIENGESELLSCHAFT in Düsseldorf-Oberbilk Sicherheitsvorrichtung für Fräsmaschinen
US1920476A (en) * 1931-04-13 1933-08-01 Henry E Morton Traversing support for metal working machines
FR1469377A (fr) * 1966-02-16 1967-02-10 Protecteur de dégauchisseuse à pont automatique

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394499A (en) * 1920-05-11 1921-10-18 Phineas C Ingstrum Jointer-guard
US1630671A (en) * 1924-05-03 1927-05-31 R Hoe And Co Inc Guard for planing machines and the like
US2054518A (en) * 1935-10-15 1936-09-15 Walker Turner Company Inc Hold-down guard for jointers
FR1032487A (fr) * 1951-02-15 1953-07-02 Protecteur pour dégauchisseuses
FR1034856A (fr) * 1951-03-30 1953-08-05 Ogier Boudoul & Cie Protecteur de dégauchisseuse
FR2268609A1 (en) * 1974-04-26 1975-11-21 Fagueret Henri Safety device for woodworking machine - has plate over cutter raised and lowered by sensors actuated by workpiece
FR2520286A1 (fr) * 1982-01-26 1983-07-29 Dementhon Armande Dispositif de protection sur degauchisseuse
FR2553703B1 (fr) * 1983-10-19 1987-05-15 Begemo Diffusion Sarl Dispositif de protection pour degauchisseuse
FR2645066B1 (fr) * 1989-03-28 1993-05-28 Lurem Sa Protecteur de porte-outil degauchisseur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60707C (de) * Firma DÜSSELDORFER EISENBAHNBEDARF, VORM. CARL WEYER & CO., AKTIENGESELLSCHAFT in Düsseldorf-Oberbilk Sicherheitsvorrichtung für Fräsmaschinen
US1920476A (en) * 1931-04-13 1933-08-01 Henry E Morton Traversing support for metal working machines
FR1469377A (fr) * 1966-02-16 1967-02-10 Protecteur de dégauchisseuse à pont automatique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Lexikon Dubbel; Taschenbuch für den Maschinenbau, 19.Auflage, Springer Verlag, Seite G 51 *

Also Published As

Publication number Publication date
EP0570605B2 (fr) 2002-04-24
DE59203301D1 (de) 1995-09-21
EP0570605A1 (fr) 1993-11-24
ATE126471T1 (de) 1995-09-15

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