DE1914671A1 - Device and method for the detachable fastening of upright, elongated, flat objects - Google Patents

Description

PATENTA COOL '

.PL.-iNG. buschhoff _Dipl ._ _Ing . _Vollbac h 1914671

DlPL.-lNG. HENNICKE

5 COLOGNE / RH.

KAISER WILHELM RING 24

Registration number.

Dv 201 I COLOGNE, 19.3.69- _st

please specify

Patent application

of the company

Dovey Manufacturing Company, 3220 West 25th Street, Anderson

Indiana 46013 (ü; S.A.)

"Apparatus and method for releasable fastening of upright, elongated, flat objects "

The invention relates to a device and a method for the detachable fastening of upright, elongated, flat objects, in particular thin knife blades in a groove or a similar, elongated recess a bracket.

The invention is particularly suitable for the installation of steel knives in the outer circumference of the Fiesserträger of a turning cutter

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ders, which cooperates with a platen and the card sheets between the platen and the Knife carriers pass through, "are cut according to the arrangement of the knife. In addition, the invention. also applicable in other fields and could be used for assembling different types of knives or blades in very different tools are used which are used in cutting technology. In addition, the invention in general for fastening a wide variety of thin, upright objects in a groove use Find.

When cutting forms from cardboard sheets, it is preferred uses a device in which line knives are arranged on the outer circumference of a cylindrical knife carrier, -der is mounted on a rotatable shaft. The line knives usually consist of flat metal strips with one long edge forms a cutting edge and the other edge is used for attachment to the circumference of the knife carrier. A rotatable counter-pressure roller is arranged radially at a distance from the knife carrier and cooperates with the knives in such a way that the between the counter-pressure roller and the knife carrier pushed through Cardboard sheets are punched out or cut out in a shape determined by the arrangement of the knives. Generated here every rotation of the knife carrier an identical row of cuts or punch lines. This device is therefore

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for the economical mass production of die-cut cardboard sheet products particularly suitable. In addition, such a device is relatively simple in construction and causes low manufacturing and maintenance costs.

Because of its many merits, the above-mentioned device is considered to be the most suitable apparatus for cutting sheets of cardboard widely recognized. The main disadvantage of the rotary cutter, however, is the difficulty of attaching the cutter in the knife holder. So far, a wide variety of fasteners and methods have been used with varying degrees of success. L-for example, a well-known method was to provide the Hesserträger with a large number of segments, the outlines of which correspond to the shape of the forms to be punched out corresponded. This procedure was very expensive and required

a high level of accuracy of production and fit. In addition, the range of "^". I was limited to a rare, obtainable set of kettle assemblies .

Another known method consisted in the outer perimeter; of the Hesserträger I-iuten and the Hesseblade to be attached here with wedges made of deformable material, for example from -ilei. Next to it were different types of mechanical clamp and screw fastenings in use. All Back-up fastening devices, however, made it more difficult to

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tightening and loosening the knife blades and were very time consuming.

The object of the invention is to provide a very simple method and a device which simplifies the assembly and disassembly of thin strip-shaped objects, in particular knife blades in a groove and allows to carry out in the shortest possible time W. Here, the blades should be rigidly attached to the holder without the use of mechanical clamp or screw fastenings.

This object is achieved with the invention that in addition to the flat blade resting against a side wall of the groove is an elastically deformable clamping strip with a plurality of closely spaced projections extending outward on two opposite longitudinal sides is tightly fitted into the groove which presses the blade against the side wall of the hat.

Such a device has the advantage that the flat strips, in particular knife blades can be used quickly and securely held by inserting the clamping strip. Of the The clamping strip can be easily pulled out again if necessary, so that changing the blades is no problem.

to ensure a secure fit of the blade in the groove,

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the width of the clamping strip is slightly larger than the order the thickness of the blade reduced the width of the groove.

Below the clamping strip can be on the floor of the fury a bar must be inserted, which fills the width of the groove and against which the blade is in its lower area supports. The clamping strip then lies above the bar and presses the blade near the upper edge against the side wall of the groove. This prevents the blade from tilting in the groove and the blade in its held in an upright position. It is particularly useful to have two clamping strips lying one above the other in the groove to order; This causes a. On the blade along two at a distance superimposed lines achieve a clamping effect, that holds the blade securely in place.

According to the invention, the clamping strips are formed by coil springs. When inserting these coil springs occurs a elastic deformation of their individual turns, so that the coil springs sit under high tension in the groove. However, inserting and removing the springs is relatively easy.

In order to prevent the individual coils from snagging when two helical springs are used, one on top of the other is it is advantageous if the coil springs are in the same. Directions

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are twisted. In order to achieve a particularly high torsional resistance of the knife blade with deep grooves, it is recommended to arrange the superimposed clamping strips along their entire length at a small distance from each other.

To increase the resistance of the Nesser blade to being pulled out, can the blade on. their edge opposite the cutting edge protruding from the groove has at least one bent over edge Have flaps which rests on the bottom of the groove and over which the clamping strips are arranged.

When assembling the device according to the invention is preferred proceeded so that a blade with essentially plane-parallel side surfaces on edge in such a way in a groove of the Holder is made that the cutting edge of the blade protrudes from the groove and a side surface of the blade on one Side wall of the groove rests. Then a clamping strip 'starts at one end and progresses bit by bit pressed into the groove from above and deformed in such a way that it rushes with its protruding parts on the one hand clamps against the side surface of the blade facing the groove and on the other hand against the free side wall of the groove. Above The first clamping strip can then be pressed into the groove by a second clamping strip.

This method has the advantage that the clamp or

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The strips can be inserted effortlessly as they are not all over the place Length at the same time, but starting at one end piece by piece progressively being pressed into the rod and theirs laterally protruding parts are not deformed all at once, but one after the other.

The invention is illustrated by the drawing of exemplary embodiments explained in more detail. It shows:

1 shows a rotary cutter for cutting and punching cardboard leaves in a side view and partly in section,

Fig. 2 shows the object of Fig. 1 in a vertical direction Partial section in a preferred embodiment the invention,

Fig. 5 is an end view of one of the in Fig. 2 Fasteners used in the illustrated embodiment s,

Fig. 4- is a plan view of the fastening means along line IV-IV of Fig. 2,

Fi'v. 5 shows the object of FIG. 2 in a longitudinal section along line VV of FIG. 2,

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Fig. 6 is an oblique view of the embodiment shown in Fig. 2, in which the process of assembly and disassembly is shown and

FIGS. 7, 8 and 9

other embodiments of the invention in partial cross-sections.

Fig. 1 shows, in a somewhat schematic representation, a side view of a rotary cutter A, which during cutting out of cardboard sheets used type in which the subject matter of the invention is applied to particular advantage. The rotary cutter A consists of a cylindrical knife carrier 10, which is mounted on a rotatable, driven shaft 12 is arranged. On the outer circumference of the cylindrical knife holder 10 knife blades 14 are mounted, which with a cooperate rotatable counter-pressure roller 16, which are in the radial direction at a distance from the cylindrical knife carrier 10 is located. The counterpressure roller 16 has a cylindrical lern 18 which is rotatably attached to the shaft 20. The outer circumference the back pressure roller is preferably made of a heavy cover 22 of resilient material, such as made of rubber. It can be seen that a cardboard sheet 24, which is passed between the knife carrier 10 and the counter-pressure roller 16 is, in one by the arrangement of the knives 14

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cut or punched out in a specific shape.

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The configuration of the rotary cutter A described above is, as far as it has been described, known and of the type as it is preferably used for cutting and punching cardboard is used. As mentioned above, there was one the main one. Problems with a rotary cutter of this type in the difficulty of finding suitable means for solvable Attachment of the knife blades to the outer circumference of the Hesserträger 10 to be provided. The invention therefore creates a very simplified "method for connecting the knife blades" here with the knife carrier.

shown in Fig. 2, the knife 14 consists of an elongated, relatively flat blade with almost planar helices Side surfaces 25 and 26 which are connected to one another along one edge by a cutting edge 28. The knife blade 14- is located in a longitudinally extending groove 30 defined by two generally parallel side walls J2 and 34- is formed by a floor area 36 are connected to one another. In the embodiment under consideration, the groove 30 is incorporated into a blade holder 38, which is attached to the cylindrical knife carrier 10 with several machine screws 4Ό. The hats 30 could of course also be molded directly into the outer circumferential surface of the cylindrical knife carrier 10 or from flat or

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v / incel-shaped holding elements are formed which are attached to the Outer circumference of the knife carrier 10 are attached. The knife blade 14 extends sieve / longitudinal direction of the Iftite 30, wherein their side surface 25 against the side wall 32 of the

Lays groove.

The means for releasably securing the knife blade 14 in

™ of the grooves 30 are particular to the present invention tig. These means are formed by an elongated, elastically deformable clamping strip, which has a plurality of close together, has outwardly extending projections on two opposite longitudinal sides. The clamping strip is designed so that the transverse ab * - stood between opposing, outwardly extending projections is somewhat larger than the distance between the side surface 26 of the blade and the side wall 34 of the tail .. The latter distance is in ELg. 2 labeled "a". The clamping strip is then inserted into the duck 30 in such a way fitted tightly so that it extends in the longitudinal direction thereof.

Here, the outward-extending before jumps pushed inward until it reaches a transverse distance h-abejx, which essentially corresponds to the distance "a". The elasticity se property of the clamping strip generates forces that act outwards through the small individual surfaces of the projections and exert a clamping force on the blade -

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In the preferred embodiment, the clamping

Screw

strip of a spring and the outwardly extending projections are formed by diametrically opposed outer peripheral surfaces of each turn of the spring. When the spring is tightly clamped in the tongue, the outer peripheral parts of each turn lie on the side wall; 3 ^ of the groove 30 and the side surface 26 of the knife blade 14- along a short, narrow band that roughly has the shape of the shaded areas 50 i * ¹ S ¹ Xg. 5 has. Due to the large number of small, closely spaced surface areas 50, a relatively high overall clamping force is generated on the blade and it is almost impossible to pull the blade out of the groove with the tongue inserted. The spring each

docu can be removed relatively easily by maxi them step by step, as shown in Fig. 6, out of the groove egg hurries.

The spring is preferably pressed into the rute step by step with a limited number of turns. E.g. We first press in a short section of the spring and then the remaining length of the spring is reduced in each case Indented sections. A variety of tools could be used when inserting the springs. Preferably, however, the tool should be designed so that a permanent Deformation of the spring avoided when it is correctly positioned a suitable tool for this purpose is in

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B shown * The tool 80 has a downwardly extending x'c-il 82, the measurements of which a slight in lead into the groove 30. The lower end 84 of the tool is adapted to the outer circumference of the spring. Furthermore a stop S6 is provided to limit the extent to which the tool can be inserted. The pen will as a result, always arranged at the same depth of the groove "and can be done regardless of the size of the exerted on the tool Force cannot be permanently deformed.

As is evident from the foregoing, the respective force is proportional low, which has to be expended at all times when driving in the spring. Against this is the force required to pull it out the blade must be used with the spring inserted, extremely high. When the nib and the blade designed like that are that they abut against opposite end walls of the groove, creates the inclination of the surface areas 50 in the case of the blade and the spring, the endeavor to move in the longitudinal direction of the groove when the attempt an attempt is made to pull the blade out of the groove. Such a translational movement in the longitudinal direction is of course not possible if the groove has a face against which ' the pen and the knife knock. As a result, the knife blade is held even more firmly in place.

Turning back to the preferred shown in FIG.

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Embodiment too, it will be noted that two springs 44 and 46 are used. These springs are preferably the same Shape and, as shown in Fig. 3, a normal diameter "b" which is slightly larger than the distance "a". Svßi! Feathers in the one in Pig. 2 are preferably used because the blade is so perpendicular to its thickness at two spark is set and this results in greater stability against lateral tilting in the groove. In addition, the Springs 44 and 45 as shown in Figures 2 and 5 are the same V / ickelrichtuiig. For example, both springs are clockwise or both springs, coiled counterclockwise. This prevents the springs from engaging with each other and shifting the points at which press them against the blade. This feature can best be seen in 'Fig. 4, in which it can be seen that the turns the upper and lower springs cross each other diagonally.

When inserting the second spring 46, a tool is preferably used is used, which is similar to the tool 80 previously described. The position of the stop 86 is of course different, so the second spring cannot be pushed into the first spring. In addition, it is better if the feathers are each other do not touch. For example, the lower peripheral surface of the upper spring should be different from the upper surface the lower. The spring are at a short distance.

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While it is preferable to use two springs of the type and manner shown in Figure 1, others may of course be used. Types of springs are used which have, the less dense rolled coils or other types of elongate, resilient clamping strips are used which are arranged in a similar Orra ¹ D, is / v iron on outwardly extending projections.

Fig. 7 shows another embodiment of the invention, the is similar in all details to the embodiment shown and described in Fig. 2, but with the exception that the knife blade 60 has a tab 62 which is bent at right angles from the main blade part and against the bottom surface 36 of ITute 30 is present. The tab 62 can along the Knife blade can be formed continuously or a plurality of individual pieces of flap of any desired length represent. The rag helps insert the knife blade into the groove and prevents the knife blade from getting in to tilt the hat across.

Although this is less desirable, it is of course also possible to use just one spring to clamp the blade in the groove to use. 8 and 9 show two embodiments of the invention in which only one spring is used. In Figure 8, a tongue is positioned along the bottom of the groove and is in engagement with the side surface of the knife

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blade and the opening of the hat. The feather is enough to prevent the knife blade from being pulled out of the hat, however, is less than that in Fi r_. 2 «; eKc -, - i (:.: Tc execution form suitable to prevent the üesserklinre from being calibrated when looking at it of Fig. 8 to rotate clockwise.

The embodiment shown in Fig. 9 also uses only one Feather. In this embodiment, however, there is a longitudinally extending, substantially rectangular bar 64 arranged on the bottom surface of the hat, preferably rests tightly against the clasp and the side wall of the groove. This bar, in conjunction with the clamping spring, prevents the blade from being turned clockwise.

The invention is not limited to the exemplary embodiments but modifications and changes are still possible without thereby exceeding the scope of the invention.

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Claims (10)

Dv 201 3/19/1969: st Claims Device for the detachable fastening of upright, elongated, flat objects, in particular of thin knife blades in a groove or 'a similar one', elongated recess of a holder, characterized in that that in addition to the flat blade (14) resting against a side wall (32) of the hat (30), an elastically deformable blade Cling strips (44) with a variety of close adjacent projections extending outward on two opposite longitudinal sides in the JAute (50) is tightly fitted to which the blade (14) rjegen the side wall (32) of the hat (30) presses. 2. Apparatus according to claim 1, characterized in that the width (b) of the clamping strip (44, 46) is somewhat larger than the iAclit width reduced by the thickness of the blade (14) (a) the ITute (3o). 3. Device according to claim 1 or 2, characterized in that f-'ekcmiacichriqt, that below the Kleinmstreifens (44) on the bottom (36) of the hat (30) a bar (64) is inserted, which the 809841/0253. - "V ₁ '- .: ■: ..-.: .. - ■■■ ■.» · *' BAD ORIGSNAL 19H671 Groove (30) fills the width and against which the Blade (1 * 4) is supported in its lower area. 4. Apparatus according to claim 1 or 2, characterized in that in the rod (30) two clamping strips (44, 46) lying one above the other are arranged. 5. Device according to one of claims 1 to 4, characterized in that that the clamping strips of coil springs (44, 45) are formed. 6. Device according to one of claims 1 to 5 »characterized in that that the coil springs (44, 4S) are wound in the same sightings. 7. Device according to one of claims 1 to 6, characterized in that that the overlying clamping bars (44, 46) over their entire length at a small distance from each other are arranged. 8. Device according to one of claims 1 to 7 »characterized in that that the blade (14) is opposite at its cutting edge (23) protruding from the ifu "be (30) Edge has at least one bent flap (62) which rests on the bottom (36) of the mute (30) and above which the clamping strips (44, 46) are arranged. 909841/0253 '_ ₁₈ _ BAD ORJGfNAL .18-19H671 9. A method for assembling a device according to a of claims 1 "to 6, characterized; that one Blade (14) with essentially plane-parallel side surfaces (25 »26) upright in such a way in a hat (30) of the holder (38) is made that the cutting edge (28) of the blade (14) from the groove (30) protrudes and a side surface (25) of the blade (14) rests against a side wall (32) of the nut (30), and that there is a clamping strip (44) beginning at one end and progressing piece by piece from above hot ^{1 is} pressed into the Ivute 00) and is de.ß de.ß in such a way that it calibrates with its protruding -Jeile on the one hand against the side flanks (26) of the blade (14) facing the 1-Tute (30) and on the other hand against the free one Side wall (34) of the l.ufce (30) is stuck. 10. The method according to claim 9 »characterized in that above of the first clamping strip (44) still has a second clamping strip (46) is pressed into the rod (30). 9098 ^ 1/0253 ^ ^D OBfQINAL