FR2823464A1 - TOOL MACHINE INCLUDING A PLANER AND A MORTISER - Google Patents

Abstract

The machine tool for woodworking includes a jointer (12) and a mortiser (14). The machine comprises a movable cover (24) for protecting the planing cylinder. This cover (24) is movable between a protective position preventing access to the planing cylinder and a position of use of the planer (12). It further comprises a movable flap (56) movable between an active position of obstruction of the chuck of the mortiser (14) and a retracted position, allowing access to the chuck. The flap (56) and the cover (24) are adapted to cooperate in order to allow the flap (56) to be in its retracted position only when the movable cover (24) is in its protective position and in order to maintain the cover protection (24) in its protective position as long as the flap (56) is in its retracted position.

Description

protected from splashing water.

  The present invention relates to a machine tool for woodworking, of the type integrating a jointer and a mortiser and comprising a support table for planing, a rotary warping cylinder disposed transversely to the support table and a rotary mandrel of support for a drill bit for slotting, the mandrel and the planing cylinder being coupled in rotation, the machine further comprising a movable cover for protecting the planing cylinder, which cover is movable relative to the table between a protection position prohibiting access to the planing cylinder and at least one position of use of the planer allowing at least partial access to the

planing cylinder.

  Many machine tools are adapted to ensure both

  the dogauchissage of wood and the mortising.

  The purpose of wood planing is to straighten one of the rough sawn surfaces of a piece of wood, that is to say to level it. It is the pre

first phase of wrought.

  The slotting operation consists in forming a mortise in a piece of wood, a mo rtaise being a hole of section generally recta ng u

  laire, this hole being intended to receive the post of another assembled part.

  For planing, the machine tool comprises a support table made up of two surfaces between which the tops and rolls of warping disposed transversely. The two surfaces of the table are offset by a height determining the thickness of the chip. The planing cylinder has a cylindrical tool holder on which are joined

  cut, according to its generators.

  Dogmaking is carried out by moving the part to be planed, resting on the support table, the part being moved perpendicularly.

  rement to the planing cylinder rotated.

  In order to prevent the risk of accident caused by the rotation of the planing cylinder, it is known to provide a movable protective cover covering the emerging part of the planing cylinder. This cover generally comprises a gutter movable between a protective position pressed against the planing cylinder along the entire length thereof, thus preventing access to the planing cylinder, and a position of use of the planer allowing the minus partial access to the planing cylinder, the gutter being spaced therefrom or in a position of only partial covering of the warping cylinder. The mortising machine generally comprises a rotary mandrel adapted to receive bits allowing the drilling of successive holes in a piece of wood. In order to allow the planing cylinder and the mandrel to be driven in rotation by the same geared motor group, it is known that the mandrel and the planing cylinder are coupled in rotation. In particular, it is known to fix the mandrel axially at the end of the

planing cylinder.

  For safe use of known machine tools, it is recommended not to leave a drill bit in place in the chuck when using the jointer. Indeed, under the action of the rotation of the planing cylinder, the constantly coupled mandrel is rotated leading to the wick turning on itself. The drill bit which thus extends the planing cylinder and protrudes from the support table poses a significant risk of injury to the user,

  when moving the part to be planed.

  The object of the invention is to propose a solution to this problem of risk of injury to the user by a slotting bit left in

  place when using the jointer.

  To this end, the invention relates to a machine tool for woodworking of the aforementioned type, characterized in that it comprises a movable flap movable relative to the axis of the mandrel along a retraction path, between the less an active obstruction position, in which the flap extends in the axial extension of the mandrel and a retracted position, in which the flap is away from the axial extension of the mandrel, and in that the flap and said cover are adapted to cooperate in order to allow the flap to be in its retracted position only when the movable cover is in its protective position and in order to maintain the protective cover in its protective position as long as the flap is in its position retracted. According to particular embodiments, the machine tool com carries one or more of the following characteristics: - said cover comprises at least one profile forming a stop for stopping the vo on its retracting path towards its retracted position, when the cover is in or each position of use of the jointer; - The shutter is articulated with respect to the support table; - The shutter is articulated around an axis parallel to the axis of the mandrel; One of the flap and of the cover comprises a pin forming an abutment and the other of the flap and of the cover comprises a notch for passage of the pin aligned opposite the pin only when the hood is in its protective position; - Said notch includes a notch for receiving the plon when the flap is in its retracted position, the flap being kept immobilized in rotation by the plon engaged in said notch under the action of the weight of the flap; and - the cover comprises a cover member movable along the axis of the planing cylinder between a position of total cover of the planing cylinder and at least one position of partial cover of the planing cylinder, said cover member comprises an extension forming a stop for the flap, which extension projects through said retraction path in the or each position of partial coverage of the planing cylinder, and the extension is away from said retraction path when the member cover is in its position of

  total coverage of the planing cylinder.

  The invention will be better understood on reading the description which will

  follow, given only by way of example and made with reference to sins, in which: - Figure 1 is a partial perspective view of a machine tool according to the invention in which the flap prohibiting the use of the mortiser is in an active obstruction position; - Figure 2 is a perspective view in cross section of the machine tool taken along line 11 of Figure 1; and - Figure 3 is a view similar to Figure 1 in which the flap

  prohibiting the use of the mortiser is in its retracted position.

  The machine tool shown in Figure 1 is intended for the work of

  wood. It includes a jointer 12 and a mortiser 14.

  The machine comprises a frame 16 supporting a horizontal table 18 of the jointer. Table 18 has two flat surfaces horizonta 20A, 20B whose height offset is adjustable. The height between the front surface 20A and the rear surface 20B is equal to the thickness of the co

  skin to be removed from the piece of wood applied to the table 18.

  Between the two surfaces 20A and 20B is disposed transversely a

  rotary hammer cylinder 22.

  This cylinder, represented in FIG. 2, comprises a cylindrical tool holder on which are fixed cutting blades extending along

tool holder generators.

  The planing cylinder 22 is rotated around

  its axis X-X by a gearmotor group not shown.

  The part of the planing cylinder 22 exposed between the surfaces 20A and 20B is protected by a movable protective cover 24. The protective cover 24 comprises an arm 26 articulated at one end 28 relative to

table 18.

  The arm 26 is articulated around an axis Y-Y extending parallel to

  the axis X-X of rotation of the cylinder 22.

  The cover 24 includes a cover gutter 30 generally conforming to the shape of the cylinder. This gutter generally extends above the exposed part of the cylinder 22. It is slidably movable mounted along the axis X-X of the cylinder in a slide 32 brought to

the free end of the arm 26.

  An adjustment screw 34 is mounted on the arm 26. It cooperates with the table 18 in order to adjust the angular offset between the surface of the table 18 and the arm 26. In addition, elastic return means of the arm 26 to the '' gap

  the table 18 are interposed between the arm and the table.

  The cover gutter 30 is movable between a position of total cover of the planing cylinder 22 and at least one position

  partial coverage of the planing cylinder 22.

  In the figures, the covering gutter 30 is shown in its fully covered position. To bring it to a partial cover position, the gutter 24 is moved in translation in the direction of the arrow F1 relative to

backstage 32.

  In this position, the end of the planing cylinder 22 op posoe to the support arm 26 is exposed, allowing the wise planing of a piece of wood according to its thickness. To this end, the piece of wood is applied against a vertical guide arranged longitudinally along the table 18, this guide not being shown in the figures. In a partial cover position, one end 36 of the gutter protrudes at the

behind the scenes 32.

  Furthermore, the entire protective cover 24 can be moved relative to the table 18 by angular movement of the arm 26 between an active protective position preventing access to the planing cylinder, the gutter being in the position of total cover, and a position of use

of the planing cylinder.

  In the active protective position preventing any access to the planing cylinder, this position being illustrated in the figures, the gutter completely covers the planing cylinder and this is applied against the table 18, ie arm 26 being completely folded against the

table 18.

  On the contrary, in a position of use of the jointer, either the gutter 30 is brought into a partial protective position, as explained above, or the arm 26 is angularly offset from the table 18, so that the gutter 30, even if it extends along its entire length above the planing cylinder 22, is spaced therefrom by an interval allowing the passage of a piece of wood to warp. As illustrated in FIG. 2, the mortiser 14 fitted to the machine tool 10 according to the invention comprises a mandrel 50 fixed axially at the end of the planing cylinder 22, at the end of the latter located on the side of the

arm 26.

  The mandrel 50 is integral in rotation with the cylinder 22. It is adapted to receive a drill bit intended for drilling successive holes in a

  piece of wood for making a mortise.

  The mandrel 50 is disposed inside a tubular protective housing 52 having an opening 54 situated in the axial extension of the mandrel. This opening 54 allows the passage of a wick whose fixing end is secured to the mandrel and whose active end projects

outside the housing 52.

  According to the invention, a shutter 56 for closing the opening 54 is articulated around an axis Z-Z relative to the housing 52. The axis Z-Z extends parallel

ment to the X-X axis of the mandrel.

  The flap 56 has a general shape of a disc. It is articulated at an eccentric point located in the upper half of the housing 14 facing towards

the free end of the arm 26.

  The flap 56 is adapted to be movable between an obstruction position of the opening 54 as illustrated in FIGS. 1 and 2 and a retracted position illustrated in FIG. 3, in which the flap is away from the extension axial of the mandrel and allows the passage of a drill bit

across opening 54.

  In order to completely free the opening 54, the flap 56 has a

  clearance 58 provided at its periphery.

  In addition, opposite the release 58, the flap 56 has a size 60 adapted for the passage of a pin 62 during the ascent of the flap towards its retracted position while the protective cover 24 is in its

  protection position of the planing cylinder.

  The notch 60 has at its end a receiving notch 64

plon 62.

  The pin 62 is secured to the free end of the arm 26 and more specifically to the slide 32. The pin 62 extends in the direction of the mandrel 50.11 protrudes slightly beyond the end of the cover gutter 30 when the latter is in its position of total cover of the cylinder

planing 22.

  At its projecting end, the pin 62 has a groove 66 extending in the plane of movement of the flap 56. The section of diameter reduced by the groove 66 of the plon is adapted to be received in the notch 60 of the

  flap when the latter is brought to its retracted position.

  As illustrated in FIGS. 1 and 2, the flap 56 is normally in its position of obstruction of the opening 54, preventing the placement of a drill bit in the mandrel 50. In fact, the flap 56 is held in place ceKe position in a stable equilibrium state under the action of his pro

pre weight.

  In this position of the flap 56, the arm 26 is free to be moved angularly to allow the spacing of the covering gutter 30 relative to the table 18 in order to ensure the passage of a part to be planed above the cylinder 22. Similarly, the gutter 30 is free to be moved in translation relative to the arm 26 in order to expose at least part

  end of the planing cylinder 22.

  When the planing cylinder 22 is thus partially ac cessible, either that the arm 26 is slightly raised, or that the gutter 30 is in a position of only partially covering the cylinder, the flap

  56 cannot be raised to its retracted position.

  In fact, if the gutter 30 is in a cover position that is only part of the cylinder, the end 36 of the gutter which projects beyond the plon 62 extends through the path of movement of the flap 56. The edge of the gutter 30 thus forms a stop preventing the angular displacement of the flap and thus immobilizing the latter in a position of obstruction of the pro

axial length of the mandrel.

  Furthermore, if the gutter 30 is in its full cover position for the cylinder 22 but the gutter 30 is not pressed against the table 18, the arm 26 is then raised so that the distance between the point of articulation of the flap 56 and the entry of the notch 60 is less than the distance separating the point of articulation of the flap of the pin 62. The plon 62 cannot then penetrate into the notch 60 and the latter constitutes a stop in which strikes the flap 56 during an attempt to move it towards

its retracted position.

  Thus, as long as the protective cover 24 is not in its protective position, the movement of the flap 56 to its retracted position is made impossible. It is therefore materially impossible to install a wick in the mandrel 50, the orifice 54 being always obstructed by the flap 56. On the other hand, when the cover 24 is in its protective position with the arm 26 folded down on the table, as illustrated in FIG. 3, the flap 56 can be brought into its retracted position, the gutter 30 no longer impeding its movement and the pin 62, correctly positioned with respect to

  the axis of articulation of the flap, which can be received in the notch 60.

  In this position, the clearance 58 is located opposite

  The opening 54. The plon 62 is then received in the notch 64.

  A drill bit M can then be placed in the mandrel and the

mortiser can be used.

  The use of the jointer is then prohibited by the presence of the flap 56. Indeed, the gutter 30 is maintained in its protective position since the arm 26 can no longer be moved angularly, its ex

  free end carrying the plon 62 being retained by the flap 56 forming a lock.

  Similarly, the gutter 30 cannot be moved in translation to expose part of the planing cylinder, the flap 56 being dis

  placed immediately opposite the end of the gutter 30.

  In addition, the flap cannot be released from its retracted position in which it completely immobilizes the gutter 30 due to the presence of the wick M. In fact, the wick M constitutes a stop prohibiting the rocker

part 56.

  Thus, in the presence of a drill bit M mounted in the mandrel 50, the

  jointer cannot be used.

  To use the mortiser, it is first necessary to remove the bit M and then replace the flap 56 in its obstructed position, releasing

  thereby the protective cover 24.

  It is understood that with such an arrangement, the mortiser can only be used when the protective cover 24 is in its active protective position. Conversely, the jointer can only be used in the absen

  this bit in the chuck of the mortiser.

  Thus, any risk of accidental injury related to the rotation of a wick left in place when using the jointer is eliminated. Similarly, any accident due to the rotation of the planing cylinder during

  the use of the mortiser is made impossible.

Claims (7)

  1.- Machine tool for woodworking integrating a jointer (12) and a mortiser (14) and comprising a support table (18) for planing, a rotary planing cylinder (22) arranged dirty transfer to the table support (18) and a rotary mandrel (50) for supporting a drill bit for slotting, the mandrel (50) and the planing roll (22) being coupled in rotation, the machine further comprising a movable cover (24 ) for protecting the planing cylinder (22), which cover (24) is movable relative to the table (18) between a protective position preventing access to the planing cylinder (22) and at least one position of use the planer (12) allowing at least partial access to the planing cylinder (22), characterized in that it comprises a movable flap (56) movable relative to the axis of the mandrel following a retraction path, between at least one active position of obstruction ti on, in which the flap (56) extends in the axial extension of the man drin (50) and a retracted position, in which the flap (56) is away from the axial extension of the mandrel (50), and in that the flap (56) and said ca pot (24) are adapted to cooperate in order to allow the flap (56) to be in its retracted position only when the movable cover (24) is in its protective position and in order to maintain the protective cover (24) in its protective position as long as the flap (56) is in its retracted position.  2. Machine tool according to claim 1, characterized in that said cover (24) comprises at least one profile (36, 62) forming a stop stop for the vo let (56) on its retracting path towards its retracted position , when the   cover (24) is in the or each position of use of the jointer.   3. Machine tool according to claim 1 or 2, characterized in that   the flap (56) is articulated relative to the support table (18).   4. Machine tool according to claim 3, characterized in that the   flap (56) is articulated about an axis parallel to the axis of the mandrel (50).   5. Machine tool according to claim 4, characterized in that one of the flap (56) and of the cover (24) comprises a pin (62) forming a stop and the other of the flap (56) and of the cover (24 ) has a notch (60) for passing the plon (62) aligned opposite the plon (62) only when the cover (24) is in its protective position.   6. Machine tool according to claim 5, characterized in that said notch (60) comprises a notch (64) for receiving the plon (62) when the flap (56) is in its retracted position, the flap (56 ) being now held immobilized in rotation by the plon (62) engaged in said notch (64)   under the action of the weight of the flap (56).   7. Machine tool according to any of the preceding claims   teeth, characterized in that the cover (24) comprises a cover member (30) movable along the axis of the planing cylinder (22) between a position of full coverage of the planing cylinder (22) and at least one position partial cover of the planing cylinder (22), in that said cover member (30) has an extension (36) forming a stop for the flap (56), which extension (36) projects through said retraction path in or each partial cover position of the planing cylinder, and in that said extension (36) is away from said retraction path when the cover member (30) is