EP0010016B1 - Antriebsmechanismus zur Parallelführung einer Reissschiene auf einem Zeichenbrett - Google Patents

Antriebsmechanismus zur Parallelführung einer Reissschiene auf einem Zeichenbrett Download PDF

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Publication number
EP0010016B1
EP0010016B1 EP79400632A EP79400632A EP0010016B1 EP 0010016 B1 EP0010016 B1 EP 0010016B1 EP 79400632 A EP79400632 A EP 79400632A EP 79400632 A EP79400632 A EP 79400632A EP 0010016 B1 EP0010016 B1 EP 0010016B1
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EP
European Patent Office
Prior art keywords
pulley
board
shaft
skirt
support
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
Application number
EP79400632A
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English (en)
French (fr)
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EP0010016A1 (de
Inventor
Pierre Denise
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Individual
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Individual
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Publication date
Priority claimed from FR7826807A external-priority patent/FR2436681A1/fr
Priority claimed from FR7921053A external-priority patent/FR2463685A2/fr
Application filed by Individual filed Critical Individual
Priority to AT79400632T priority Critical patent/ATE571T1/de
Publication of EP0010016A1 publication Critical patent/EP0010016A1/de
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Publication of EP0010016B1 publication Critical patent/EP0010016B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/02—Draughting machines or drawing devices for keeping parallelism
    • B43L13/04—Guides for rulers
    • B43L13/046—Guides for rulers with cables

Definitions

  • the present invention relates to a mechanism for controlling the movement of a rule parallel to itself on a drawing board or the like, of the type comprising at least two rollers or pulleys integral in rotation with an axis disposed parallel to the rule and, on two opposite sides of the board, notched cable or belt-like guide elements each cooperating respectively with one of the rollers or pulleys, the rule and the board being integral in translation, one of the pulleys and the other guide elements.
  • a counterweight is generally mounted on the lower strand of the element, Unfortunately this counterweight is relatively bulky and, moreover, it does not ensure effective balancing in all positions of the ruler and the board.
  • US Patent No. 3,082,535 partially provides a solution to this problem. It describes a balancing mechanism of the rule comprising a helical spring wound around an axis and integral with the latter at one end and with a fixed support at its other end.
  • This axis carries a pulley on which is wound a first cable to which is hooked one end of the rule.
  • the pulley is made integral in rotation with the axis by a disengageable coupling.
  • the two ends of the rule are fixed to a second cable, independent of the first, which conventionally ensures the synchronization of the movements of the two ends of the rule.
  • the pulley is detached from the axis and the latter is rotated by means of a button. softness, which has the effect of modifying the tension of the spring.
  • this solution has the drawback of requiring a balancing device separate from the movement control mechanism of the rule parallel to itself, which increases the size and the cost of the assembly.
  • this balancing device could not be adapted to the control mechanism of the aforementioned type by directly mounting the spring on the axis of this mechanism and making one of its pulleys disengageable: indeed, in this case the rotation of the axis would cause that of the other pulley and therefore of the corresponding end of the rule, so that any change in the tension of the spring would cause a change in the angular position of the rule on the table.
  • This device comprises two flexible steel ribbons each articulated by one end at two points spaced on the device, or the drawing tool, and extending in parallel to a winding and unwinding device comprising two spaced spools integral with the 'a common axis.
  • the invention therefore aims to achieve a control mechanism of the aforementioned type comprising, integrated therein, a balancing device of the rule which allows to adjust the balancing without changing the orientation of the rule on the board.
  • the invention also aims to provide a control mechanism of the aforementioned type which makes it easy to selectively modify the orientation of the rule on the board without changing the balancing setting, and to lock the rule in any position. this on the board, and which, in the case of sand fine guide elements, allows the tension to be adjusted.
  • the subject of the invention is a mechanism for controlling the movement of a rule parallel to itself on a drawing board, this mechanism comprising a rotary axis carrying at each of its ends a pulley and arranged parallel to the rule, two guide elements mounted along two opposite sides of the board and each cooperating with a pulley, the rule and the board being integral in translation, 1-one of the pulleys and the other of the guide elements, and a device for balancing the rule comprising a torsion spring wound around the axis and one end of which is integral in rotation with said axis and the other end of which is normally fixed in rotation with respect to said axis, as well as adjustment means of the spring tension, the means for adjusting the spring tension comprising a sleeve interposed between the axis and the fixed support and to which said other end of the spring is fixed, the sleeve and the axis on the one hand and the m anchon and the support on the other hand being capable of rotating relative to each other, and retractable
  • the sleeve comprises a hollow knurled head, fitted on a flange secured to the fixed support, and locked to this flange by said retractable fastening means.
  • said retractable securing means comprise a movable lock between a first position where it secures the sleeve with a flange secured to the fixed support at a second position where it locks the sleeve in rotation with one of said pulleys.
  • the control mechanism includes a device for braking the rule associated with the other pulley, said braking device comprising an integral part fixed support and carrying at least one brake shoe, a skirt integral with said other pulley and surrounding said jaw, and means for selectively clamping said jaw against said skirt.
  • the support of the rotary axis and of the pulleys being fixed to the board along a longitudinal edge of the latter and the guide elements being constituted by endless members each passing on a second pulley disposed in the vicinity of the other longitudinal edge of the board, said second pulleys are each associated with a device for adjusting the tension of the belt comprising an axis which carries said second pulley and which is mounted in an oblong bore a support assembly fixed along said other longitudinal edge of the board, said bore being elongated in a plane parallel to that of the board, the adjusting device also comprising means for adjusting the position of the axis in the bore.
  • Fig. 1 shows a drawing board or table 1 on which rule 2 is mounted which can move parallel to itself over the entire surface of the board 1.
  • the board or table 1 is equipped with a control mechanism which has two guide elements 3a and 3b, elongated, mounted on either side of the board and parallel to the lateral sides thereof.
  • each of the guide elements is an endless element constituted, at least partially, by an inextensible toothed belt passing over two pulleys 4a, 5a and 4b, 5b respectively.
  • the lower pulleys 4a, 4b of the two guide elements 3a, 3b are mounted to rotate freely on an axis forming part of a device 6a, 6b for adjusting the tension of the belt secured to the board 1.
  • the upper pulleys 5a, 5b which are notched, are integral in rotation with one another and are mounted at the two ends of an axis 7 (Fig. 2) free to rotate inside a tubular support 8 parallel to the upper edge of the board 1.
  • the upper pulley 5a over which the belt 3a passes is associated with a device 9 for balancing and adjusting the orientation of the rule 2, while the upper pulley 5b over which the other belt 3b passes is associated with a braking device 11 of rule 2.
  • the support 8 is fixed to the board 1 and is integral therewith, while the rule 2 is fixed at its two ends to the guide elements 3a, 3b and is consequently integral in translation. Any displacement of the rule 2 along the board 1 consequently causes a simultaneous displacement in translation of the two guide elements 3a, 3b, that is to say a simultaneous rotation of the two toothed pulleys 5a, 5b and the axis.
  • FIG. 2 shows a first embodiment of the balancing device 9.
  • a sleeve 14 which is free to rotate by relative to the axis 7 thanks to the interposition of a ball bearing 16 and which, moreover, can rotate freely in the support 8.
  • the end 17 of a wound torsion spring 18 around the axis 7 and having its opposite end 19 fixed on this axis 7.
  • the outer end of the sleeve 14 is moreover provided a knurled head 20, projecting outside the support 8, which is hollowed out internally and is fitted onto a flange 22 secured to the support 8.
  • the flange 22 has a radial housing 23 in which is mounted a ball 24 pushed outwards by a spring 26.
  • This ball cooperates with notches formed in the internal surface of the recess 28 of the knurled head 20, so as to securing in rotation the flange 22 and the head 20 of the sleeve 14.
  • the notches are delimited by curved surfaces, so that an effort on the knurled head 20 makes it possible to rotate the latter relative to the flange 22 and to modify the position of the sleeve 14 inside the support tube 8 and relative to the axis 7. It is that such a rotation of the sleeve 14 modifies the torsion of the spring 18.
  • the same balancing device can be mounted in a cable-controlled mechanism, the notched pulleys then being replaced by ordinary pulleys or by threaded rollers.
  • the ends of a cable or a toothed belt constituting an endless guide element are preferably fixed to each other by means of a connecting plate 30 (Fig. 3), which is pierced with 'A central hole in which comes to fit a stud 32 secured to the rule 2.
  • the stud 32 whose end has an annular groove in which is mounted an O-ring, rubber for example, 34, sufficiently elastic to be retracted inside the groove 33, can easily be inserted into the plate 30 or removed when it is desired to separate the rule 2 from the guide element 3a.
  • the stud 32 is carried by a fixing block 36 abutting against the end of the rule 2. Beyond this block 36 the stud 32 extends inside a U-shaped profile 38, and comprises a threaded end on which is screwed a nut 39 which a jumper 40 against the folded wings of the U-shaped profile.
  • the assembly of the attachment block of the jumper and the stud 32 is thus tightly secured to the rule 2 and this assembly can be separated of the connecting plate 30 by removing the stud 32 from the hole of the latter.
  • the ruler is free and can be lifted from the drawing board, for example for placing a sheet or for any other reason.
  • the stud 32 is then easily reintroduced into the plate 30, the seal 34 springing out of the groove 33 and ensuring the locking of the assembly.
  • the support of the rotary axis and of the pulleys 6 is fixed on the drawing board 1, while the elements of guidance are integral in translation with rule 2, but it is obvious that the balancing device of the invention can also be mounted on a mechanism operating in reverse, that is to say in which the pulleys and the 'rotary axis which connects them are integral in translation with the rule 2, while the guide elements are integral with the board 1.
  • the sleeve 14 can be interposed between a rotary axis 10 mounted inside the U-shaped profile 38 integral with the rule 2, the knurled head 20 protruding at one end of this profile 38, between it and the corresponding toothed pulley.
  • the immobilization of the rule can then be obtained in any desired position, as previously described.
  • the toothed belt can, of course, be fixed at each of its ends to a junction plate pierced with a hole for cooperation with a fixing stud, but in this case the stud is secured to the board.
  • this arrangement facilitates the possible replacement of the belt or the cable and makes it possible to tension the guide element. Indeed, it is no longer necessary to provide a clearance allowing a lifting of the rule since the latter can be made independent of one or the other of the guide elements at will, by a simple removal of the stud 32.
  • the accuracy of the synchronization of the displacements of the two ends of the rule is, consequently, reinforced.
  • Figs. 4 and 5 illustrate a second embodiment of the balancing device, designated by the reference 109 which can be substituted for the balancing device 9 of FIG. 2.
  • the axis 7 has a polygonal section and a cylindrical sleeve 111 with an inner diameter greater than the largest dimension in section of the axis 7 is rotatably mounted around it.
  • the sleeve 1 1 is integral at one of its ends with a radial flange 112 having projecting on one face a cylindrical extension 113 delimiting with the flange 112 a housing in which is received a ball bearing 114.
  • the flange 112 ends at its periphery with a ring 115 arranged on the same side of the flange 112 as the extension 113, that is to say on the side opposite to the fixed support 8.
  • a slot 116 In the ring 115 and the collar 112 is formed a slot 116 through which a latch 117 can move, the role of which will be explained later.
  • a helical torsion spring 118 On the other end of the sleeve 111, which extends inside the tubular support 8, is fitted a helical torsion spring 118.
  • the other end of the spring 118 is fitted on a ring 119 mounted freely sliding on the axis 7.
  • the section of the internal orifice of the ring 119 is complementary to that of the axis 7 so that it is integral with the latter in rotation.
  • the ends of the spring 118 are integral in rotation with the sleeve 111 and the ring 119 respectively thanks to the tightening of a few turns on these two elements, and the end of the spring fixed to the ring 119 is free to move axially with the ring the along the axis 7.
  • a tubular spacer 120 is arranged around the axis 7 between the sleeve 111 and the ring 119.
  • the sleeve 111 is threaded into a flange 121 secured to the fixed support 8 and ensuring its axial and radial positioning.
  • the flange 121 has at its periphery one or preferably several housings 122 open on the side of the flange 112 and closed on the opposite side and with which or which the slot 116 can be aligned parallel to the axis 107. In the aligned position -de the slot 116 with a housing 122, the latter is capable of receiving the lock 117.
  • the length of the lock 117 is such that, when it is fully engaged in the housing 122, it extends in part in the slot 116 and thus locks the flange 112 with the flange 121, which prevents any rotation of the sleeve 1 1 1 relative to the support 8.
  • the toothed pulley 5a is constituted by a tubular piece having a cylindrical external skirt 123 and a cylindrical internal skirt 124 connected by an annular core 125.
  • the external skirt 123 carries on its external face a radial toothing 126 which cooperates with the toothed belt 3a and on its inner surface a conical toothing 127.
  • the toothing 127 cooperates with a complementary conical toothing 128 carried by an intermediate piece 129.
  • the intermediate piece 129 comprises a tubular part 130 of cylindrical outer surface and whose internal section is complementary to that of the axis 7 so that the part 129 is integral in rotation with the axis 7.
  • the tubular part 130 is connected by an annular part 131 bearing against the internal cage of the bearing 114 to a cylindrical skirt 132 delimiting with the tubular part 130 an open housing on the side of the adjacent end of the axis 7 and in which is received the internal cylindrical skirt 124 of the pulley 5a.
  • the skirt 132 is integral with a conical part 133 which carries, on the one hand, the conical toothing 128 and, on the other hand, at its periphery, an annular toothing 134 which is engaged under the crown 115 of the flange 112. The intervals separating two adjacent teeth from the toothing 134 can be aligned radially with the slot 116 to receive the latch 117.
  • the lock When the lock is fully engaged in the toothing 134, it partly extends in the notch 116 and thus locks in rotation the intermediate piece 129, and consequently the pulley 5a by means of the conical teeth 127 and 128, with the collar 112. It will be noted that the axial length of the lock 117 is such that, when it is fully engaged in the housing 122, it is completely disengaged from the toothing 134 and that, conversely, when it is fully engaged in the toothing 134, it is completely disengaged from the housing 122.
  • the pulley 5a is applied against the intermediate piece 129 by a helical spring 135 disposed around the tubular part 130 and bearing respectively against a circlip 136 fixed to the tubular part 130 and against an annular rim 137 of the skirt 124.
  • the intermediate piece 129 is positioned axially on the axis 7 between the bearing 114 and a second circlip 138 fixed on the axis 7.
  • the balancing device 109 is completed by a covering 139 in the form of a cup threaded onto the external skirt 123 of the pulley 5a and of which a conical end flange defines one of the flanges 140 of the pulley, the other flange 141 being constituted by a conical edge of the skirt 123.
  • the covering 139 can be fixed to the pulley 5a by any appropriate means, for example by screws engaged in holes made for this purpose in the covering 139 and in the annular core 125 of the pulley 5a.
  • the balancing device which has just been described makes it possible to adjust the tension of the spring 118 in order to balance the rule 2 as a function of the inclination of the board 1 on the vertical.
  • the latch 117 In order for the spring to produce the desired balancing effect, the latch 117 must be in the position shown in FIG. 4, that is to say fully engaged in the housing 122.
  • the spring 118 one end of which is made integral with the fixed support 8 by means of the sleeve 111, the flange 112, the latch 117 and of the flange 122, then exerts on the axis 7 a moment antagonistic to that due to the weight of the rule 2 and transmitted by the belt 3a and the pulley 5a.
  • the device described above has, with respect to that of FIG. 2, the advantage of allowing a much quicker adjustment of the balancing of the rule, in particular when the inclination of the board is significantly modified. Indeed, to ensure I-balancing of the rule in all the positions of the board between the vertical and the horizontal and so that, in a given position of the board, balancing is ensured for almost all positions As a rule, the spring must have a wide range of adjustment and, therefore, a large number of turns. This means that the adjustment is made over a large number of revolutions of the axis 7. However, it is obvious that it is much faster to ensure this large number of revolutions by moving the ruler along the plank alternately up and down by turning a knurled knob by hand.
  • the device for adjusting the orientation of the rule is essentially constituted by the intermediate piece 129 and by the pulley 5a urged by the spring 135 against the piece 129.
  • the covering is grasped 139 and it is pulled against the spring 135 until the conical toothing 127 of the pulley 5a is no longer engaged with the conical toothing 128 of the intermediate piece 129.
  • the covering and the pulley 5a which has the effect of displacing the end of the rule fixed to the belt 3a, the other end of the rule remaining fixed because the axis 7 is not driven by this movement.
  • This ability to adjust the orientation of the rule is particularly useful in a certain number of fields such as, for example, the drawing of public works plans comprising a large number of lines having a slight slope with respect to the horizontal.
  • the pulley 5b of this braking device comprises a tubular part 142 of cylindrical outer surface and whose internal section is complementary to that of the axis 7 so that the pulley is integral in rotation with the axis 7.
  • the tubular part 142 is connected to a coaxial skirt 143, which partially surrounds it, by an annular part 144 which carries axial bosses 145 on its face opposite to the tubular part 142 and to the skirt 143.
  • the skirt 143 carries a radial toothing 146 with which meshes with the toothed belt 3b and has a shoulder, a conical part 147 of which constitutes one of the flanges of the pulley 5b.
  • the other flange 148 of the pulley is constituted by a conical end flange of a cup-shaped covering 149 fixed to the pulley 5b by screws (not shown) engaged in aligned holes of the covering 149 and bosses 145.
  • the axial position of the pulley 5b is determined by a circlip 150 fixed on the axis 7 and by a tubular spacer 151 surrounding the tubular part 142 and disposed between the annular part 144 and the inner cage of a bearing 152 also mounted on the tubular part 142.
  • the outer cage of the bearing 152 bears against a shoulder 153 of a part 154 secured to the fixed support 8 and forming the brake shoe.
  • This shoulder connects a cylindrical section 155 fitted in the support 8 to a cylindrical section 156 of larger diameter in which the bearing 1 52 is received.
  • the cylindrical section 156 is integral with a coaxial cylindrical skirt 157 which surrounds it and carries three circumferential lips 158 constituting the brake shoes proper.
  • Each lip 158 has a cylindrical outer surface and an inner surface substantially in the form of a spiral section so as to form with the skirt 157 an elongated slot 159 whose radial dimension gradually decreases from the free end of the lip towards the bottom of the slot where the lips 158 are connected to the skirt 157.
  • the part 154 is made of a plastic material capable of imparting a certain flexibility to the lips 158.
  • a control button 160 comprising an internal cylindrical skirt 16 and an external cylindrical skirt 162 connected together by an annular core 163 carrying three corners 164 projecting between the skirts 161 and 162 in the slots 159 and constituting cams having a profile complementary to that of the slots 159.
  • the internal skirt 161 is engaged between the cylindrical section 156 and the skirt 157 and internally has a peripheral recess 165 snapped onto a peripheral boss 166 due to section 156, thus ensuring the axial retention of the button 160.
  • the external skirt 162 surrounds the skirt 143 of the pulley 105b and is externally knurled to allow its manual actuation.
  • Figs. 7 and 8 show one, 6a, of the belt tension adjusting devices. Although we only describe below the device 6a, it should be understood that this description also applies to the device 6b which is its symmetrical.
  • the device 6a comprises a support 167, for example made of metal, formed of a tube 168 secured to a bracket in the form of a square, one of the branches 169 of which is planar and the other branch of which 170 is formed by a profile U-shaped section.
  • the flat wing 169 is fixed under the board 1 by any suitable means, for example by screws, and the core of the U-shaped section 170 is fixed against the lower edge of the board by identical means. or the like.
  • the support 167 extends over a small part of the width of the board, starting from the left lateral edge thereof looking at FIG. 1.
  • a cylinder 171 of plastic material having an oblong axial bore 172 elongated in a plane parallel to that of the board 1.
  • the cylinder 171 ends at one end by a portion 173 of larger diameter defining a shoulder 174 which bears against the end of the support and of the bracket adjacent to the left lateral edge of the table.
  • An axis 175 extends through the bore 172 and has a threaded end which projects out from the part 173 of the cylinder 171.
  • the axis 175 is retained in the bore 172 by a head 176 which bears against the face end of the cylinder 171 opposite its portion 173. of larger diameter.
  • the pulley 4a is mounted on the threaded end of the axis 175 by means of a bracing ring 177.
  • This ring has a flange 178 of larger diameter against which the inner cage of a bearing is supported. balls 179 on which the pulley 4a is mounted.
  • the collar is normally held in abutment against the end face opposite the part 173 of the cylinder 171 by a button ⁇ 80 screwed on the threaded end of the axis 173 and which clamps the inner cage of the bearing 179 against the collar 178 In this tightening position, the axis 175 is immobilized in the bore 171, but the axial length of the flange 178 is such that the pulley 4a is kept apart from the part 173 and can rotate freely around the axis 175. .
  • the support 167 is closed by a plug 181 which is received in the open ends of the tube 168 and of the profile 170.
  • the part of the plug closing the tube 168 is hollow and allows it to be fitted therein.
  • one end of a pencil or other receptacle (not shown), the other end of which is received in the corresponding plug of the other device 6b for tensioning the belt 3b.
  • the button 180 is loosened and, by means of this, the end of the axis 175 is moved until the desired tension is obtained.
  • the button 180 is then tightened to immobilize the axis 175.
  • the same operations are carried out by means of the device 6b.
  • the fixed support 8 can be constituted by an element of structure identical to that of the support 167. Thanks to the presence of the bracket, the support 8 then has a stiffening effect on the board 1 and the profile 170 can be used as a rail for sliding mounting of a lamp or other accessory.

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  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
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  • Pivots And Pivotal Connections (AREA)

Claims (19)

1. Mechanismus zur Steuerung der in sich parallelen Versetzung eines Lineals (2) auf einem Reißbrett (1), mit einer Drehwelle (7), die an jedem ihrer Enden eine Rolle (5a, 5b) aufweist und parallel zum Lineal angeordnet ist, zwei Führungselementen (3a, 3b), die längs zweier gegenüberliegender Seiten des Reißbretts angeordnet sind und von denen jedes mit einer Rolle zusammenwirkt, wobei Lineal (2) und Reißbrett (1) translationsfest bezüglich der Rollen (5a, 5b) bzw. der Führungselemente (3a, 3b) sind, und einer Vorrichtung zur Gleichgewichtseinstellung (9, 109) des Lineals, welche eine um die Welle gewundene Torsionsfeder (18, 118) aufweist, die mit ihrem einen Ende drehfest mit der Welle verbunden ist und mit ihrem anderen Ende normalerweise bezüglich der Welle hinsichtlich einer Drehung festliegt, dadurch gekennzeichnet, daß die Vorrichtung zur Gleichgewichtseinstellung des Lineals Mittel zur Einstellung der Spannung der Feder (18, 118), welche eine zwischen der Welle (7) und dem feststehenden Träger (8) liegende Muffe (14, 111) aufweisen, an der das andere Ende (17) der Feder befestigt ist, wobei die Muffe (14, 111) und die Welle (7) einerseits und die Muffe (14, 111) und der Träger (8) andererseits relativ zueinander drehbar sind, und zurückziehbare Mittel (22, 24, 26, 112, 117, 121) zur Festlegund der Muffe (14; 111) bezüglich des Trägers (8) umfaßt.
2. Mechanismus nach Anspruch 1, dadurch gekennzeichnet, daß die Muffe (14) einen hohlen Rändelkopf (20) aufweist, der einen bezüglich des Trägers (8) festen Flansch (22) umschließt und am Flansch (22) durch die zurückziehbaren Festlegungsmittel (24, 26) verriegelt ist.
3. Mechanismus nach Anspruch 2, dadurch gekennzeichnet, daß die Innenfläche des hohlen Rändelkopfs (20) eine Anzahl von Rastkerben aufweist, während der Flansch (22) ein durch eine Feder (26) in eine Rastkerbe des Rändelkopfes radial nach außen gedrücktes Element (24) trägt.
4. Mechanismus nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Träger für die Drehwelle und Rändelkopfmuffe am Lineal befestigt ist, wobei der Rändelkopf zwischen dem Rand des Reißbretts und der Rolle vorspringt.
5. Mechanismus nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Träger (8) für die Drehwelle (7) und die Rollen (5a, 5b) am Reißbrett (1) befestigt ist, daß die Führungselemente (3a, 3b) durch Endloseinrichtungen gebildet sind, und daß das Lineal auf jedem dieser Einrichtungen (3a, 3b) mittels eines Stiftbolzens (32) montiert ist, der abnehmbar in ein Loch eingeführt ist, das eine Verbindungsplatte (30) für die beiden Enden des Führungselements durchsetzt.
6. Mechanismus nach Anspruch 4, dadurch gekennzeichnet, daß das Führungselement mit jedem seiner Enden an einer Verbindungsplatte befestigt ist, welche von einem Loch für ein Zusammenwirken mit einem bezüglich des Reißbretts festen Befestigungsstiftbolzen durchsetzt ist.
7. Mechanismum nach Anspruch 1, dadurch gekennzeichnet, daß die zurückziehbaren Festlegungsmittel einen Riegel (117) umfassen, welcher zwischen einer ersten Stellung, wo er die Muffe (111) bezüglich eines bezüglich des feststehenden Trägers (8) festen Flansches (121) festlegt, und einer zweiten Stellung, wo er die Muffe (111) mit der einen der Rollen (5a) drehverriegelt, bewegbar ist.
8. Mechanismus nach Anspruch 7, dadurch gekennzeichnet, daß die Muffe (111) einen Kranz (115) aufweist, der mit einem axialen Schlitz (116) versehen ist, in welchem der Riegel (117) gleiten kann, wobei der Kranz (115) eine mit einem Zwischenteil (129) feste Ringverzahnung (134) umgibt, mit welcher der Riegel in der zweiten Stellung im Eingriff ist, und daß der Flansch (121) wenigstens eine Aufnahme (122) aufweist, auf welche der Schlitz (116) selektiv axial ausrichtbar ist und in welcher der Riegel (117) in der ersten Stellung aufgenommen ist.
9. Mechanismus nach Anspruch 8, dadurch gekennzeichnet, daß die Ringverzahnung an einem Zwischenteil (129) vorgesehen ist, welches mit der Welle (7) drehfest ist und auf welchem die Rolle (5a) drehbar angebracht ist, wobei das Zwischenteil (129) und die Rolle (5a) komplementäre ausrückbare Kupplungsmittel (127, 128) aufweisen.
10. Mechanismus nach Anspruch 9, dadurch gekennzeichnet, daß die komplementären Kupplungsmittel durch zwei auf der Rolle (5a) bzw. dem Zwischenteil (129) sitzende Verzahnungen gebildet sind, wobei die Rolle (5a) axial verschiebbar bezüglich des Zwischenteils (129) angebracht und gegen dieses durch elastische Mittel (135) belastet ist.
11. Mechanismus nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet daß die Welle (7) im Querschnitt einen polygonalen Umriß aufweist und daß das erste Ende der Feder (118) an einem auf der Welle (7) verschiebbaren Ring (119) befestigt ist, der eine Innenöffnung mit zu demjenigen der Welle komplementärem Umriß aufweist.
12. Mechanismus nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Vorrichtung zur Gleichgewichtseinstellung der einen der Rollen zugeordnet ist, und daß er eine der anderen Rolle (5b) zugeordnete Bremsvorrichtung (11) für das Lineal aufweist, wobei die Bremsvorrichtung ein mit dem feststehenden Träger (8) festes Teil (154), das wenigstens einen Bremsklotz (158) trägt, eine mit der anderen Rolle (5b) feste und den Bremsklotz (158) umgebende Schürze (143) und Mittel (160) zum selektiven Anpressen des Bremsklotzes (158) gegen die Schürze (143) umfaßt.
13. Mechanismus nach Anspruch 12, dadurch gekennzeichnet, daß der Bremsklotz (158) durch eine umfängliche Lippe gebildet ist, welche mit dem mit dem feststehenden Träger (8) festen Teil (154) fest ist, wobei die Lippe mit der Schürze einen langgestreckten Schlitz (159) bestimmt, dessen Radialabmessung vom frein Ende der Lippe zum Boden des Schlitzes hin, wo die Lippe an die Schürze (157) anschließt, fortschreitend abnimmt, und wobei die Anpreßmittel (160) ein Element umfassen, welches einen in dem Schlitz beweglichen Nocken ausbildet und einen zu diesem komplementären Umriß hat.
14. Mechanismus nach Anspruch 13, dadurch gekennzeichnet, daß die Anpreßmittel durch einen Knopf (160) gebildet sind, welcher eine die Schürze (143) der Rolle (5b) umgebende äußere Schürze (162), eine zwischen der Schürze (157) des mit dem feststehenden Träger festen Teils (154) und einem Zylinderstumpf (156) dieses Teils, der an dessen Schürze (157) anschließt, angeordnete innere Schürze (161) und einen ringförmigen Steg (163), der die innere (161) und äußere (162) Schürze miteinander verbindet und das nockenbildende Element (164) trägt, umfaßt.
15. Mechanismus nach Anspruch 14, dadurch gekennzeichnet, daß die Bremsvorrichtung (11) mehrere Bremsklötze (158) und eine gleiche Anzahl von nockenbildenden Elementen (164) aufweist.
16. Mechanismus nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß der Träger (8) der Drehwelle (7) und der Rollen (5a, 5b) am Reißbrett längs eines Längsrandes desselben befestigt ist und daß die Führungselemente durch Endloseinrichtungen (3a, 3b) gebildet sind, von denen jede über eine im. Bereich des anderen Längsrandes des Reißbretts angeordnete zweite Rolle (4a, 4b) geführt ist, und daß die zweiten Rollen (4a, 4b) jeweils einer Einstellvorrichtung (6a, 6b) für die Spannung des Zugkraftorgans zugeordnet sind, die eine Welle (175) umfaßt, welche die zweite Rolle trägt und in einer Langlochbohrung (172) einer längs des anderen Längsrandes des Reißbretts befestigten Trägereinrichtung (167, 171) angebracht ist, wobei die Bohrung (172) in einer zu derjenigen des Reißbretts parallelen Ebene langgestreckt ist und die Einstelleinrichtung außerdem Einstellmittel für die Lage der Welle (175) in der Bohrung (172) umfaßt.
17. Mechanismus nach Anspruch 16, dadurch gekennzeichnet, daß die Welle (175) ein mit einem Gewinde versehenes Ende, auf welches ein Spannknopf (180) geschraubt ist, und einen über die Bohrung vorspringenden Haltekopf (176) an ihrem anderen Ende aufweist, und daß die Rolle (4a, 4b) auf der Welle über ein Wälzlager (179) angebracht ist, wobei der Knopf (180) so eingerichtet ist, daß er die Welle (175) dadurch festlegt, daß er den inneren Käfig des Wälzlagers (179) gegen ein Ende der Trägereinrichtung drückt.
18. Mechanismus nach Anspruch 17, dadurch gekennzeichnet, daß die Trägereinrichtung einen Zylinder (171), in welchem die Langlochbohrung (172) ausgenommen ist, und einen eigentlichen Träger (167) umfaßt, welcher ein Rohr (168), in welches der Zylinder (171) eingesteckt ist, und ein mit dem Rohr festes Winkelband umfaßt, dessen beide Schenkel (169, 170) am Reißbrett befestigt sind.
19. Mechanismus nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß die Führungselemente durch undehnbare gerippte Treibriemen gebildet sind.
EP79400632A 1978-09-19 1979-09-10 Antriebsmechanismus zur Parallelführung einer Reissschiene auf einem Zeichenbrett Expired EP0010016B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400632T ATE571T1 (de) 1978-09-19 1979-09-10 Antriebsmechanismus zur parallelfuehrung einer reissschiene auf einem zeichenbrett.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7826807A FR2436681A1 (fr) 1978-09-19 1978-09-19 Dispositif d'equilibrage d'une regle mobile parallelement a elle-meme, sur une planche a dessin
FR7826807 1978-09-19
FR7921053A FR2463685A2 (fr) 1979-08-21 1979-08-21 Dispositif d'equilibrage pour mecanisme de commande de deplacement auto-parallele d'une regle sur une planche a dessin
FR7921053 1979-08-21

Publications (2)

Publication Number Publication Date
EP0010016A1 EP0010016A1 (de) 1980-04-16
EP0010016B1 true EP0010016B1 (de) 1982-01-20

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US (1) US4277896A (de)
EP (1) EP0010016B1 (de)
AU (1) AU5077879A (de)
CA (1) CA1154586A (de)
DE (1) DE2961884D1 (de)
ES (1) ES484540A1 (de)
GB (1) GB2030712B (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU600762B2 (en) * 1986-11-05 1990-08-23 Asahi Seimitsu Kabushiki Kaisha Scale balancing device in drawing machine
FR2741948B1 (fr) * 1995-12-05 1998-02-20 Rockwell Lvs Dispositif de mesure de couple, notamment pour un motoreducteur d'activation d'un organe fonctionnel d'un vehicule automobile
CN109072657A (zh) * 2016-03-10 2018-12-21 戴维·冯 耦合器
USD1003997S1 (en) * 2021-06-17 2023-11-07 Beijing Yilingchenfei Technology Co., Ltd. Drawing board

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Publication number Priority date Publication date Assignee Title
US475741A (en) * 1892-05-24 T-square and drawing-board attachment
US2160130A (en) * 1936-09-25 1939-05-30 Lisle Harold L De Drafting machine
US2399610A (en) * 1942-05-22 1946-04-30 Craftsman Line Up Table Corp Printer's line-up table
GB703965A (en) * 1951-03-21 1954-02-10 Klein Ets Georges Improvements in operating devices for windows or other vertically slidable elements provided with automatic locking means
US2825139A (en) * 1955-02-25 1958-03-04 Paul F Boehm Parallel guides
FR1150984A (fr) * 1956-05-25 1958-01-22 Commerciale R Marechal Soc Ind Perfectionnements aux baies ouvrantes
US3082535A (en) * 1959-04-20 1963-03-26 Cardinell Products Counterbalance for drawing board straightedge
FR1272556A (fr) * 1960-08-16 1961-09-29 Appareil à dessiner

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GB2030712A (en) 1980-04-10
CA1154586A (en) 1983-10-04
US4277896A (en) 1981-07-14
GB2030712B (en) 1983-03-02
EP0010016A1 (de) 1980-04-16
ES484540A1 (es) 1980-06-16
AU5077879A (en) 1980-03-27
DE2961884D1 (en) 1982-03-04

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