DE1611812A1 - Improvements to drawing boards - Google Patents

Description

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PATENT Attorney *

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899 Lindau (Lake Constance) Your · Message from Mein · Message from - Rennerle 10 PO Box Wi

2LT. 2nd 1968

Dan Karmazin, Inca House, La Oroya, Peru

Improvements to drawing tables «

When executing drawings on conventional ' The drawing paper is usually made with the help of Adhesive tape set directly on a drawing table, tensioned and fastened, which with a suitable over- tensile material is coated. In the event that; the drawing paper consists of a sheet with preprinted border lines, the border must be at least approximately on the Scales of the drawing machine are set when

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however, an unfinished drawing must be removed from the drafting table in order to create another, more urgent one To make room for the drawing and to put it on at a later occasion is a more precise operation of the adjustable button on the drawing machine required to adjust the scales parallel with the lines already drawn · Such an adjustment is often overlooked and this will complicate the work even more

The rather difficult process of removing and putting on the drawing paper is often repugnant to draftsmen and designers, and this fact increases the number Production costs · In addition, there is a drawing which has been removed from the drafting table, always exposed to the risk of damage, soiling and creasing, while in one place is brought to the other · In the case of the. simultaneous Execution of a number of original drawings are usually carried out on a common table or one Shelf compartment collected in a filing cabinet. Also in this Case are the drawings of the risk of damage exposed and beyond that the clarity is bad.

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These disadvantages have been eliminated by the present invention, which relates to a pick-up element for drawing paper, with the aid of which the drawing paper can be easily and quickly placed on a drawing table of any kind placed on top and easily removed, if desired, close the drawing table in a conventional Uleiee In this way, the recording element enables the drawing office to "do its work in accordance with all requirements the production and the more or less urgent nature of the work to be carried out. Adapt drawings.

The invention is generally characterized by a receptacle element attached to oak drawing paper in a conventional manner, e.g. Depressions and at least two projections on the front surface of the drawing table, which have the same thickness as the plate, in order to be able to adjust the plate relative to the drawing table into a position in which the protrusions engage in the indentations, with the help of which the The plate must be locked on the drawing table iirdV \ ./-'■ ~ _: "~~ - \. ■ '. ■''.-'-' ■■ - -.

In this way, due to its connection with the plate, the drawing can easily be seen during its execution handled u / earth as the drawing paper along with the plate can easily be removed from the drafting table and moved to another place, for example for the purpose of coordinating the drawings, taking photos (dlikrofilmaufzelchnung) or the approved a supervisor.

A system that makes panels in accordance with the present invention contains, makes it possible to continuously clean and close the plates by a force other than the draftsman smooth and the latter therefore does not need to interrupt his drawing work.

with the help of simple stands can be one or more Plates containing original drawings are placed on a desk or work table for control purposes. which is necessary when executing a number of drawings belonging to the same project at the same time. Ee is also possible to position the drawing paper during to adjust the work vertically, even on drawing tables of old construction, where such an adjustment was previously impossible "

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The invention is illustrated by way of example in the following description with reference to the accompanying: drawings; described. Go from the "drawing and the description for this. Further features of the invention emerged. _

Figure 1 shows a front view of the on a drawing table fixed plate (the stand, the drawing machine and other parts of the table with no direct relationship to the present invention have been omitted),

FIG. 2 shows, on an enlarged scale, the drawing table in FIG Side view}

Figures 3 and 4 show depressions of various shapes; t ■

Figure 5 is a sectional view of a recess;

FIGS. 6 and 7 show, on an enlarged scale, one of the projections of the drawing table in a front view or; a cut on the. Line VII-VII of Figure 6;

FIG. 8 shows, in a side view and on an enlarged scale, the drawing table according to a second embodiment j

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FIGS. 9 and 10 show, in a front view and in vertical section, a third embodiment of the drawing table, the line element and the receiving plate are omitted}

FIG. 11 shows a fourth embodiment of the drawing table in a front view;

FIGS. 12 to 14 show, in an enlarged ItIsGetab, in a front view and in a vertical section, details of FIG Embodiment according to Fig. 11}

FIG. 15 shows a fifth embodiment in a front view;

Figures 16 to 18 show on an enlarged scale in front view or respectively. Vertical section details of the Embodiment according to FIG. 15;

FIG. 19 shows a sixth embodiment in front view;

FIGS. 20 to 23 show, on an enlarged scale, in front view and in horizontal section, details of FIG Execution farm according to FIG. 19;

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FIG. 24 shows a seventh embodiment in a front view

FIG. 25 shows on an enlarged scale and in section

a detail of the embodiment according to FIG. 24;

FIGS. 26 and 27 show, in a front view, respectively. A recognition part in the vertical section.

In the drawings, there is a drawing table of traditional construction, the one with a drawing machine provided and attached to a stand. «The drawing machine and the stand · are not shown. GfMBG Fig, 1 and 2. is. the drawing table s the upper edge with a long, horizontal rail 2 made of angle steel and a kürten, horizontal rail 3 made of angle steel and In its lower part it is a long, horizontal rail 4 and a short, horizontal rail 5, also from Angle steel; provided · The upward leg the rail 2 has three incisions 6 arranged at a distance from one another and the one running downwards Leg of rail 4 l * t with three corresponding, ch Incisions 7 arranged at a distance from one another are provided. The leg of the splint 3. And the after

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legs of the rail 5 pointing down are each with provided with a single, corresponding incision *

In the drawings 10 and 11 * represent two metal rulers represent which on the back of their upper end part with a projection 12 are provided which has an inclined bottom 13 and a slightly smaller width than the length which has incisions.

The upper rails 2 and 3 made of angle steel are provided with leaf springs 15, which with the help of screws 14 (Fig. 2) en the rails are attached. The front end 16 of each leaf spring 15 is bent upwards, engages in the corresponding incision and luird by means of the spring action against the inclined surface 13 of the approach 12 pressed. At the bottom are those Rulers 10, 11 are provided with a shoulder, which is like an upwardly bent hook of slightly smaller width than the incisions is shaped. If so, the top approach a ruler 10, 11 brought into engagement with an incision and the ruler is pushed down so that the extension 12 presses on the upwardly bent front end of the spring 15, the hook 17 at the lower end of the ruler in the corresponding incision of the lower

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Engage rail made of Ulinkel iron and be coupled with the same by means of the spring action. The hook 17 is provided with a projection 18, »which the engagement of the Hook into the concealed incision made easier. As a result the fact that the nested surface 13 of the extension 12 pressed against an inclined surface 16 of the leaf spring 15 the ruler firmly against the front surface of the Drawing tables are pressed. The rulers IQ, 11 are also slightly arched in the longitudinal direction, the convex Area to the drawing table 1 shows so that they are about their entire length should be close to the surface of the drawing table. About the movements of the standards of the drawing machine The edges 19 of the rulers 10, 11 cannot be blocked beveled and the rulers taper from the middle part towards the top, as shown in FIG. The upper end of each ruler 10, 11 is provided with a finger recess 10a, 11a for fastening and removing. take the ruler to make it easier.

The right ruler 11, which is suitable in one of the notches 6,? to intervene in the rails 2, 4 made of stainless steel, 1st at the middle part of its inner edge provided with a semicircular «disk-shaped projection 20, which is firmly connected to the ruler. The left one

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Ruler 10, which is suitable, constantly in the incisions to engage in the short rails 3, 5 made of angle steel is directly opposite the projection 20 with a similar one Semicircular disks * Shaped projection 21 provided, which however, it is attached to an elastic arm 22 (FIG. 6) which is attached to the ruler 10 by means of two rivets 23. At the upper end is the arm 22 with a side hook provided »which in an L-shaped recess 25 in the the rear surface of the ruler engages «Das nach oben Directional end 26 of hook 24 acts as a stop to prevent the elastic arm 22 from moving laterally limit. The edges 27 of the semicircular protrusions 20, 21 ″ iron a V-shaped cross-section (Fig. 7).

The drawing paper is attached to a flat, relatively thin (approximately 3 mm) square plate 28, preferably Made of white or light-colored synthetic resin or aluminum. Each of the four edges of the plate 28 is connected to a Number of semicircular recesses 29 provided, the are arranged directly opposite one another «The edge 30 each recess 29 is angeachlassung on both sides of the plate (Fig. S) to match the V-shaped edges 27 of the Projections 20, 21 cooperate · Even the straight parts 28a of the plot edges between the depressions 29 are

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bevelled on both sides of the plate 28 for the purpose of grasping to facilitate the plate with dart Firtgern

After both rulers 10, 11 in the above described Uieise have been attached to the drawing table 1, WiTd the left edge of the plate 28 between the rulers 10i; 11 inserted and moved towards the left ruler 10 ', to one of the depressions 29 on the left edge of the Plate into the V-shaped edge 27 of the spring-operated Protrusion 21 engages and moves the same to the left until the right edge of the plate between the Rulers can be inserted and the directly opposite recess 29 on the right edge can engage the projection 20 of the right ruler 11 · Then the drawing paper is attached to the plate 28, for example by means of an adhesive tape. In that case, that the drawing work must be interrupted before the drawing has been completed, the plate 28 simply removed from the drawing table by the plate 28 against the action of the elastic arm 22 after is moved to the left, so that the right recess 29 of the projection 20 of the right ruler 11 is released, whereupon the plate 28 together with the drawing paper can be removed from the drawing table.

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In the fill that a drawing of a different format is to be executed, the ruler 11 is set, to engage in another pair of incisions 6, 7 in the drawers 2, 4 made of angle steel. The ruler 11 is removed from the drawing table by a downward movement overcoming the action of the spring 15, see above that the approach 17 disengaged in the incision of the Rail 4 made of angle steel is brought, whereupon the ruler is moved up to the extension 12 out of engagement to bring with the incision in the splint 2 «After the ruler 11 has been brought into a new position, another plate 28 is of a size, accordingly the space between the rulers, as described above, placed between the projections 20, 21.

The shape of the projections 20 and the depressions * 29 is free, but the semicircular shape according to FIG. 3 or the angular shape according to FIG. 4 have proven to be particularly suitable for this purpose. In the case of circular projections and recesses the advantages should jumps have a slightly larger radius than the recesses so that only two contact points or short lines of contact between the edge of the projection and the V _e rtiefung arise, since this any displacement

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des Piafet§ teläfciv to the rulers and de * leiehentiseh

ßtdüfdfr, dtfl all edges of the * plate 28 ifflt \ / eftitffut \ gtfS vöisehtit öittd <iiiij? d es imnrer wögiicihi Bsin'f. the ^ Pl afc te So kiniit böl in eirisr gewünsdhtön Stsllung auFzulegsn «« ejsieliuielöe of 2 # iehfitint8fat »£ §f u (S 90 -e'der 160 ° gtdEöh wetd # ft _f füj to it? the Zeiebiiei? tfflefiidli to fflacheri, e £ f »§ comfortable position

The location of the recesses 29 also makes it possible to use the Plate 28 at a machined height on the dent drafting table attach. In addition, the symmetrical Fdim of the Pletta 20 makes it possible ι both of the plate for; of a drawing paper zi | use* *

Öas IKlateElai of the plates 20 let prefer a light, stiff, but somewhat flexible, synthetic material äüföreist _r as the base forThe drawing paper is suitable beispielsuieise a softer synthetic resin uiieM / ynyl plastics "

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To the Untertrichtiden of the drawings in dim Akfcenechrwnk 2u facilitate, know a simple color code connects by making the corners 31 of the plettes 28 different dyed or * grounded in a worded whisper. When putting on the drawing paper, puff the drawing table ■ Buten Pletten «it drawing on the same project belong to a predetermined corner, for example the upper right corner, wear a uniform color, for example bleu, if you are in your right place Space in the filing cabinet. By checking the upper, align the corners of the panels in the filing cabinet, it is very easy to distinguish the drawings belong to a specific project. This system is advantageous to you, if you want to get information quickly about projects in progress ·

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The plate 2EJ can be drawn with auxiliary lines (not shown)

provided seiljj to make drawing easier *

Figure 8 shows a modified embodiment of the attachment of rulers 10, 11, the top of each ruler 10, 11 consists of a misshapen part 32 in which a Bolt 33 is axially slidably mounted on the one Coil spring 34 acts "The downward movement of the bolt

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limited by the spring action let by a stop 33 ·. At the lower end is the bolt 33 "with a head 35 provided, »which has a sloping underside and in the corresponding incision in the upper rail Bus Winke! stand J. * uf. # W * drawing table 1 β ingι matures «ate lower rails your angle steel after tig« 1 and 2 are through Rails 36 sue Flechetshl replaced, «oak en the lower Edge of the drawing table 1 are straight, coincide with the rails according to FIGS. 1 and 2, the numbers are 36 with a bz «. three incisions and the function If the same is the case in the construction according to FIGS. 1 and 2

Figures 9 and 10 show another embodiment Attachment for the rulers 10, 11, suitable for drawing tables, whose drawing table is attached to a path 1st, a bushing 37 is in a nut 38 in a Bore fixed in the drawing table 1. One end of the socket 37 consists of a conical head, a hole lies in a conical recess in the front surface of the drawing table 1. The ruler 10, 11 1st with a rectangular extension 40, which serves as a guide part for the ruler by inserting it into a rectangular opening 41 in the end 42 of the socket 37 engages. A leaf spring 43, one end of which by means of a screw

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44 is attached to the bushing 37, is bent down at its opposite end and lies on the upper, inclined surface 45 of the lug 40. A radial pin in the bushing 37 limits the movement of the spring 43, uienn the ruler 10, 11 of the drawing table 1 is removed "

The opposite end of the ruler 10, 11 is on one Fastened socket 47, which has a shaft which with the help of a fflutter 48 in a bore in the drawing table 1 is attached. The ruler 10, 11 is provided with a pawl-shaped extension 49, which through the Effect of the spring 43 with the edge of a rectangular Opening 50 in the front wall 51 of the socket cooperates.

The lower end 52 is bent at right angles and serves as a when attaching and detaching the ruler Handle.

In this construction there are no parts on the top and lower edge of the drawing table 1 attached, which the movement of the U / agens of the drawing machine or theirs Could block the guide system.

Figures 11 to 14 illustrate another embodiment

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ferm. the attachment for the plate, unless the jumps are attached to rulers. The right projection contains an elongated plate 53, the left end of which is semicircular and has a V-shaped edge profile. The opposite end 54 of the plate 53 ^ is bevelled so that it does not block the movement of the llilaßstähe the drawing engine, ftuf the back of the plate is provided with a short shaft 55 S3, which carries on its inner face a smaller circular disc 5 * The Drawing table T is provided with a socket 57, which is fastened by means of a nut 58 in a bore in the drawing table. In the end wall 59 of the ". Bushing 57 a keyhole-shaped opening is made, which contains a circular part 60 of a slightly larger diameter than the disk 56 and a groove 61 of a slightly larger width than the shaft 55. Between a ring 62 and an axially movable Bottom 63 in the socket 57 a helical spring 64 is attached, which presses the bottom in the direction of the disk 56.Uienn the circular scraper 56 is inserted into the circular part BO of the opening, the bottom 63 is pressed inward and the spring 64 is compressed, after which ^ Jer shaft 55 is moved into the groove 61 so that the plate 53 is firmly coupled to the drawing table 1 with the aid of the action of the spring 64.

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The left protrusion includes one on a U-shaped Leaf spring 66 attached, approximately semicircular plate 65ι which on an elongated plate 6? with a beveled edge 68 is attached «Above is the plate 67 with a recess 69 for the upper, hook-shaped End 70 of the spring 66 provided * On the back is the Plate provided with a fastening arrangement of the same construction as above in connection with the plate 53 described murder. ·

If desired, the drawing table in conventional Uleise to use, the plates 53 and 67 can easily removed, after which a thin plate is placed on the drawing table «

A similar construction is illustrated in Figures 15-17. Figure 15 shows a drafting table made by a plate 72 is covered. The plate 67 with the projection 65 is attached to the plate 72 with the aid of rivets, gluing or compression molding. A plate 73 provided with keyhole-like openings 60, 61 (Fig. 16) fits into plate 72 and covers a recess 74 therein. The plate 53 is on the same Way attached to the drawing table 1, as above in the appendix

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in connection with the construction won Tig 11 to 14 has been written "

FIG. 18 shows an arrangement for attaching the plate 72 en the drawing table 1. In Fig. 18, 75 denotes one Bolt, which by means of a nut 76 in a bore in the drawing table 1 is fixed the bolt 75 let provided with a cylindrical head 77 which lies in an opening in the plate 72 and a threaded part 78, the one! flutter 79 carries, by means of which the plate 72 is attached is attached to the drafting table.

Figure 19 shows another arrangement for attaching the Plate on the drawing table in which 80 a ruler denotes which is detachably attached to the drawing table 1 in the manner described above. The ruler 80 is provided with a longitudinal channel 81 in which a straight line of transverse Pins 82 is arranged. Each corner of the plate 83 is Hook 84 is provided. When attaching the plate 83, one of the hooks 84 is inserted at the upper edge into the channel 81 so that it engages one of the pins 82, after which the corresponding hook on the lower edge is also in the gutter is used to stand on the bottom of the gutter

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to lie. Dia hakan and pens must be arranged in this way be that the hook on the lower edge always between two adjacent pins 82 can be used.

According to this arrangement, the plate is attached to the drawing table by means of gravity and the arrangement can therefore only be used at drawing tables with an inclined Surface used u / earth. On horizontal drawing tables, the pins and hooks must be mechanically Fastening parts are replaced.

A construction with a circular plate is shown in Fig. 24 illustrates. The wells of plate 85 consist of two guideways with an angular cross-sectional profile, one along the perimeter on each soap fflittelkantenflansches (Fig. 25) run, but are other profiles are also possible. The plate 85 rests on at least two supports 86, which by means of screws 67 attached to the drawing table and with two spaced apart mutually arranged projections are provided, which engage in the guide tracks in the plette.

This construction can only be used with inclined drawing tables be used in which gravity is the plate

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in their correct position. An additional elastic projection is required for horizontal drawing tables, to the. To press plate against the supports "

The arrangement of Fig. 24 is for draftsmen, lithographers and others unsuitable for having a rotating drafting table with stepless adjustment in any desired position require. The plate 85 can with the help of imprint or Engrave with. be given a graduation.

The support arrangement according to FIG. 24 can also be used in conjunction to be used with square panels. In this case the support parts consist of at least two arms, soft perpendicular to the plane of the drawing table in guides the lower edge of the table are slidable · After the Arms have been pulled from the drawing table, the Plate attached to them, and by means of the foregoing End portions of the arms against the surface of the drafting table pressed.

Figures 26 and 27 illustrate another arrangement for Marking of the plates. 3every corner of the plate 28 is n provided with a circular opening. 89 denotes one Colored elastic synthetic resin washer by

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θ tu / a β larger diameter than the opening · The disc 89 is provided with an approximately T-shaped slot, which allows the disc to be compressed so that it can be pressed into the opening in which it is securely held by means of the elastic force will. . "■ '· ...

Claims _; ; ^

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Claims (1)

16 Π 812 en t en 8 ρ r Ö c h β 1. Pick-up part for placing drawings on pier euf a drawing object, de d u r c h ge Ic e π η - ζ verify that the receiving part contains a flat, relatively thin plate (28), or stiff or almost stiff material and at least two depressions (29) which are narrow on each side of a plane of symmetry of the plate and at least two projections (20, 21) on the U-face of the drawing table (1) of the same thickness do the plate (2B) _{1 to} enable the plate to be adjusted relative to the drawing table in a position in which the projections (20, 21) into the recesses ( 29) to lock the plette (28) on the drawing table (i). 2. receiving part according to claim 1, d a d u r c h g e - k e η η ζ e i c h η e t that the depressions (29) and Projections (20, 21) are arranged directly opposite one another relative to the plane of symmetry. 3. receiving part according to claim 1 or 2, d ad u r c h ■ .- 24 - 009885/0045 - BAD OR »G» NAL g e k e π η ζ e i c h- η e t that the depressions (29) are arranged on the edges of the plate (28), and that one of the l / or projections (20) relative to the drawing table (i) is stationary, whereas the ender projection (21) means Spring action in a plane parallel to the drawing table (1) beu / egba r is, 4. receiving part according to claim 3, characterized in that the depressions (29) and Projections (20, 21) are shaped such that their edges in the engaged position each other at zujei places touch. 5. receiving part according to claim 3 or 4, characterized g e k e η π ζ e i c h η e t that the edge of the depressions (29) beveled on each side of the plate (28) and that the edge of the projections (20, 21) has a V-shaped profile (27) corresponding to the beveled-rf edge the depressions (29). 6. receiving part according to one of claims 1 to 5, characterized g β k e η η ζ e i c h net that the projections (20, 21) on parallel, removable rulers (10, 11) attached to the drawing table (1) from / on maximum - 25 - 009885/0045 times the same thickness as dim UötsprÜngö (2Ö ,, 21) ühddli Plate (2S) befeatigi alltd * 7, Aufnähmet part according to claim 6, since you r c h g · k e ή π ζ e ic h η et that the end parts of the rulers (10, 11) are provided with lugs (12, 17) that are suitable are, by spring action in locking parts (2, 3, 4, 5) the upper and lower edges of the drawing table (1). 8 «recording part according to claim 7, d a d u r c h. g β - k e π η. ζ ö i c h η e t that the approaches (1 · 2, -17) from oppositely directed hooks exist, soften through Spring action in incisions (6, 7) on rails (2, 3, 4, 5) on the top and bottom edge of the drawing table (1) intervention. 9. receiving part according to claim 8 »d a d u r c h ge k e η π ζ e χ C η π e t that one of the rails (3) with a leaf spring (tB-) is provided, one end of which (16) engages in the corresponding incision, 10. Aufnahtneteil according to claim 9 # d a du τ c h ge ken η ζ e i c h η e t that the end (16) of the in the ■■ '■■ · ■' ■■ * - 26 - ': 0Q9S8S / 004S The incision engaging the leaf spring (15) is slightly bent upwards. 11. receiving part according to claim 8, characterized ge - marked ri ^. % _f that one of the hooks (32) of each ruler (10, 11) is provided with an axially movable spring-actuated bolt (33), the end (35) of which engages in the corresponding notch. 12. receiving part according to claim 11, characterized in that that the lower edge of the incision and the face of the engaging in the incision Bolts (33) are beveled. 13. Receiving part according to claim 7, characterized in that the locking parts in the Drawing table (1) fixed sockets "(37, 47) contain, and that the lugs (40, 49) of the rulers (10, 11) with Help the. The spring action engages in the sockets (37, 47). 14. Receiving part according to claim 13, since you r c h characterized in that one of the sockets (37) is provided with a leaf spring (43) which is in engagement with the shoulder (40) of the corresponding ruler » - 27 _{ΛΛΛ A} SAD ORIGINAL 00988570045 15. receiving part according to "one of claims 6 to 14, by g e k e η η ζ e i c h η β t that, the rulers (10, 11) are curved in the longitudinal direction and that the approaches on the concave side of the Li ^ nea-l-s' are attached. \ *, · Ν 1f. Receiving part according to one of Claims 6 to 15. durchge -ke η τι ζ e ic h η et that, · the longitudinal edges of the rulers (10, 11) are bevelled '. 17. Aufnähmetei ¹ according to einom dsr claims 6 to 16, characterized in that,.-Each ruler (10, 11) from its central part to the upper end werjungt. 18. Recording part according to one of Claims 1 to 17, d a du r c h g e k e η η ζ e i c h η θ t that the bendable projection (.65) with the help of an elastic Arm (66) is attached to the drawing table (1). 19. receiving part according to one of claims 1 to 5, thereby g β k e η η ζ e i c h η et that the projections are removable from the drawing table » - 28 - BATH ORIGINAL 009885/0045 ' 20, receiving part according to claim 19, characterized characterized in that the projections (53) by means of a bayonet lock on sockets (57) in the drawing table (1) are attached. · 21., receiving part according to claim 19, since by gek en η ζ calibrate η et _t “. that the projections (53) are brought by means of a bayonet lock on a plate (73) which is removably attached to the drawing table (1). 22. Receiving part according to claim 20 or 21, since d ure h g e k e η η "ζ e i c h η e t that each projection (53) with a short shaft (55) with a round disc (56) is provided, and that the end wall of the socket (57) with a key-shaped opening is provided, which a circular opening (60) of slightly larger diameter than the disc (56) and a groove (61) slightly wider than the shaft (55). 23. Receiving part according to one of claims 1 to 5, characterized in that the wells by heeling (84) on the plate (83) are formed and that the projections from transversely extending - 29 - ■> .— BADORiQlNAL 0 09885 / 0ΟΛ5 fenden pins (82) in a longitudinal direction Channel (Si) exist in a ruler (80) which is attached to the Mark (i) is attached »: 24 * receiving part according to one of claims -1 to 23, d a d u r c h g e k e η η ze ic h η e t that the plate (28) (83) is square. . 25. Receiving part according to a '- "of the ■" "' claims 1 to 23, since ge k β η η ζ e i levels that the plate is polygonal. > 26. receiving part according to one of claims 1 to 25, thereby g e k e η η ζ e i η e t that the edge parts (28a) to the indentations (29) bevelled on each side of the plate * 27 «receiving part according to one of claims 1 to 26, d a d u r c h ge k en η ζ e i η et that the corners (31) of the plate (28) colored differently are. 28. 'receiving part according to one of claims 1 to 23, since d- "urchgek en η ζ e 1 ch η β t _t that the plate (85) is circular. " 29. Receiving part according to one of claims 1, 2, 4, 5, 19 and 24 to 28, characterized g β ke η η ζ θ I net that the projections consist of supports (86) with an upward part, which at attack the lower edge of the plate (85). 30 «receiving part according to one of claims 1 to 27 and 29, characterized in that the plate at the corners with openings for insertion different colored discs (89) is provided. 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