GB2146102A

GB2146102A - Wall assembly

Info

Publication number: GB2146102A
Application number: GB08413358A
Authority: GB
Inventors: Siegfried Barthel
Original assignee: Polygraph Leipzig Kombinat Veb
Current assignee: Polygraph Leipzig Kombinat Veb
Priority date: 1983-09-05
Filing date: 1984-05-24
Publication date: 1985-04-11
Also published as: DD224389B1; IN162305B; GB2146102B; GB8413358D0; DD224389A1

Abstract

A wall assembly comprises assembly members (1, 2) and pins (7) are provided at the bearing locations of the members, the pins being arranged in generally semicircular-section recesses (5, 6) which correspond in curvature to that of the pins. The recesses are formed at neighbouring edges of the members and are axially parallel with bores (28) for shaft and roller bearings. The depth of each recess (5, 6) is smaller than the pin radius. A cross connection element (22) with recesses (23 to 25) can be provided for an assembly member (17) which is to extend transversely to the parallel assembly members (1, 2). <IMAGE>

Description

SPECIFICATION Wall assembly The present invention relates to a wall assembly, especially an assembly which can be used in machine construction for the rationalisation of assembly connections, for example the frame walls of a printing machine.

A particular requirement for rationalisation in machine construction, above all in the construction of rotary printing machines in multistorey mode or when several printing units are to be placed one against the other to form a row, concerns reduction of the considerable amount of effort involved in manual operations for the joining together of relatively large and heavy frame walls, which as a rule are movable only by lifting means.

It is known to mechanically finish all the sides of the walls to be assembled, for example by planing, milling or grinding, before further processing of the walls through drilling on co-ordinate drilling machines, the main purpose of such drilling operations being to provide bearing bores for cylinders, rollers, shafts, and bearings for interlinked drive systems.

The processing of the sides of the walls, especially the processing of the fit surface, has to be carried out very accurately with respect to dimensions, parallelism of oppositely disposed surfaces, and angular relationships of the sides in order to keep manual finishing work during later assembly within acceptable limits. The maintenance of this dimensional accuracy in the necessarily narrow tolerance range cannot be ensured with planing or milling machines even in optimum conditions.

The measuring means used for the measurement of the relatively large walls are not such, with respect to dimensional and angular accuracy, as to exclude measurement errors.

Any measurement errors combine with production errors caused by the machines and increase the later manual finishing work. By means of such work, inaccuracies can be compensated for or eliminated, but the exchangeability of one wall with another is usually precluded.

For reduction of the fitting operations in the connection of walls, it is also known to eliminate inaccuracies by employing shims which are stepped in dimension and which are arranged between the fit surfaces of the walls to be joined together.

Although manual working of surfaces by means of files or other such tools is reduced by such an arrangement, more frequent measuring and more frequent taking apart and joining together again of the relatively heavy walls is required, and an angular deviation of the processed fit surfaces cannot be compensated for by these shims without a manual fitting operation.

In DD-WP 45 947 there is disclosed a method in which fit plates of wedge shape are arranged to be displaceable relative to each other. Another method involves use of shims which are connected to each other by a thread and are vertically displaceable by way of the thread.

When placing two mechanically finished wall together, as a rule it is not sufficient when these are connected in agreement in all planes, as there are the difficulties that the axial spacings between the bearing bores of one must agres with the bearing bores of the other and this requirement can be released only with compromises in all the aforesaid known methods.

In addition, a levelling shoe is known from DE-GM 7 908 561 and auxiliary equipment for setting-up of heavy loads from EP 00 37 673, inter alia, of printing mechanisms. However, neither is suitable for a bearing connection of assembly elements, particularly for the connection of walls in printing machines.

There is thus a need to reduce the mechanical production effort, above all the effort in manual fitting operations, for the assembly of elements such as frame walls.

According to a first aspect of the present invention there is provided a wall assembly comprising a plurality of substantially coplanar wall members which are provided with mounting bores extending transversely therethrough and which bear against each other by way of a plurality of bearing pins engaged in a respective pair of part-cylindrical recesses provided one in each of two neighbouring edge portions of the members and extending paral lelly to the mounting bores, the radius of curvature of each recess being substantially the same as that of the associated pin and the radial depth of each recess being less than the radius of the associated pin.

In a preferred embodiment, the pins are provided at bearing locations of the assembly members and are mounted in substantially semicircular-section recesses which correspond in curvature to the radius of the pins and which are machined into contact edges of the members. The recesses are axially parallel with the bores for shaft and roller bearings and are located together with these from a common origin of a co-ordinate system. The depth of each recess to the plane of the associated edge is smaller than the pin radius.

With this arrangement, assembly members similar to frame walls can be firmly connected together, by at least two bearings, to be true to dimension and angle in several planes, particularly for the assembly of frame walls in a printing machine. The assembly members can be capable of being prefabricated in a mechanical production process, with simultaneous reduction of the mechanical processing effort, with such a high accuracy that they may be above to be assembled and exchanged with little or no manual fitting work.

According to a second aspect of the present invention there is provided a method of manufacturing a wall member for an assembly according to the first aspect of the invention, the method comprising the steps of providing an oversize wall member blank, defining first and second bore locations in the blank from a common reference point, the first bore locations being in edge regions of the blank, forming a respective cylindrical bore at each of the first and second locations, the bore at each first location having a radius corresponding to that of an associated pin in said assembly, and removing excess material from the blank around part of the bore at each first location to define a respective edge face of the wall member and, from that bore, a partcylindrical recess having a depth less than the radius of the bore.

In a method exemplifying the invention excess material is provided at the bearing locations of the assembly members for the formation of receiving bores which correspond to the diameter of the pins and these bores are located and drilled from a reference point common to further bearing bores for cylinders, rollers and shafts. After drilling of the receiving bore, the excess material is removed until a substantially semicircular-section recess is left, the depth of which to the adjacent edge face formed by the material removal is smaller than the radius of the bore. As a result of such a method, the previously usual mechanical processing of the contact sides of the assembly members to achieve dimensional accuracy, parallelism and angularity of the fit surfaces is redundant.The bores for the formation of the recesses can be carried out by a preferably programmable co-ordinate drilling machine, possessing a high production accuracy, from a zero point or origin, which is fixed for all of the assembly members, in conjunction with all remaining bearing bores according to a drilling diagram which has exactly determined co-ordinates. It is thereby achieved that the recesses resulting from removal of the excess material in each assembly member represent fit surfaces which axially, dimensionally and angularly coincide with all bearing bores and dimensionally and angularly coincide with all fit surfaces of other such assembly members to be produced the same method.

In assembly of the members, all members produced by the same co-ordinate drilling scheme can be exchangeably joined together, without any fitting operation, with the interposition of the pins at their bearing locations. An appreciable rationalisation is thereby achieved in the assembly of the side walls of a rotary printing machine. A particular advantage of this method is that the axial spacings of the bearing bores in one frame wall exactly agree with the spacing of the bearing bores in another frame wall. This enhances the function and life of the gear drive couplings of cylinders, shafts and rollers in a printing machine.

If an assembly member is to be placed transversely on two parallel members, then the steps are performed as already described except that in this case a cross connection element is arranged between pins in recesses at the bearing locations of this assembly member. The cross connection element can be provided with two substantially semicircular-section recesses arranged parallel to each other for the reception of the pins at one contact side and with a recess, which is displaced through 90 relative to the other recesses, on the opposite contact side.

For the production of such an assembly member, there is again provided a blank from which excess material is removed after drilling.

In order to enable firm interconnection of the individual assembly members, each pin is provided perpendicularly to its central axis with a passage bore which in the assembly of the members is in alignment with a drilled bore in one member and with a threaded bore in the other member. The two members can then be firmly held together by means of a bolt engaged in these bores.

Embodiments of the assembly and an example of the method of the present invention will now be more particularly described by way of example with reference to the accompanying drawings, in which: Figure 1 is a schematic side elevation of a first wall assembly embodying the invention; Figure 2 is a side elevation of part of a wall member blank from which a wall member of the assembly of Fig. 1 can be produced; Figure 3 is a cross-section, to an enlarged scale, along the line A-A of Fig. 1; Figure 4 is an end view, in the direction B of Fig. 1, of two such assemblies and associated elements of a printing machine; Figure 5 is a side elevation of an intermediate element present in the assembly of Fig. 1; Figure 6 is an end view, in the direction C of Fig. 5, of the element of Fig. 5; Figure 7 is a side elevation of part of a second wall assembly embodying the invention; ; Figure 8 is a cross-section, to an enlarged scale, along the line D-D of Fig. 7; and Figure 9 is a side view of a modified bearing arrangement in a wall assembly embodying the invention.

Referring now to the drawings, there is shown in Fig. 1 a wall assembly comprising four wall members 1 and 2 with two bearing means 3 and 4 provided between each two neighbouring edges of the members. Each bearing means 3 or 4 is provided by two substantially semicircular-section recesses 5 and 6, between which a pin 7 is arranged.

Extending through each pin 7 perpendicularly to its axis is a bore 8 (Fig. 3) which is aligned with a smooth bore 9 in the member 1 and a threaded bore 10 in the member 2. A pas sage 11 for the introduction of a bolt 1 2 into the bores 8 to 10 is disposed in the member 1.

The described connection, in which a bolt 1 2 passes through the bore 8 in the pin 7, is a preferred arrangement. It is also possible to arrange such bolts 12 beside or on either side of the pins 7.

In another embodiment, shown in Figs. 7 and 8, the assembly comprises laterally stepped wall members 13 and 14. Substantially semicircular-section recesses 1 5 and 1 6 are present only at stepped contact surface in this embodiment. The assembly members are again firmly connected together by means of bolts 1 2 passing through the pins 7.

If it should be desired to arrange a wall member 1 7 (Figs. 1 and 4) transversely on parallelly arranged spaced apart assemblies 18 and 18 (Fig. 2), a bearing means 1 9 is provided to bridge over the assembly mem bers joined together in the same plane. A cylinder 20 and a shaft 21, mounted in the wall members, are arranged to extend between machine sides formed by the two spaced apart assemblies, as shown in Fig. 2.

A respective substantially semicircular-section recess 6, in which a pin 7 is engaged, is arranged in each of the lower co-planar members, while the member 1 7 is provided at both contact sides with recesses 5 in which pins 7 are engaged. These lower, axially parallel recesses 6, and the pins 7 associated therewith, are displaced through 904 relative to the recess 5 and associated pin. To complete the bearing means 19, an intermediate element 22 is arranged between the upper member 1 7 and each of the lower members 1 8 and 18' and is provided with two lower axially parallel recesses 23 and 24 and an upper recess 25 displaced through 90 relative thereto.The fastening of the pins 7 in this bearing means is effected, in the already described manner, by bolts 12, the arrange ment of which is indicated by chain-dotted lines in Figs. 1 and 4.

It is also possible to arrange the assembly element 1 7 to be mounted transversely on only one of the assembly members of each lower assembly. In this case, the two axially parallel recesses 6 for the reception of the pins 7 are provided beside each other in the appropriate lower members.

In a modification, shown in Fig. 9, the pin 7 is bevelled at two sides in an upper sector possessing an arc of 180 to 200 . The use of such a pin 7 has, to a limited extent, the effect of a loose bearing arranged beside a fixed bearing. In the joining together of two, relatively long assembly members, any deviation at the outer limit of the acceptable tolerance range, from the zero dimension between two recesses 6 or 5 can be compensated for by such a bevelled pin.

For the production of each of the assembly members 1 and 2 of the element 22, there is provided a blank with excess material 26 (Fig.

2) in the regions where the recesses 5 and 6, or 1 5 and 16, or 23 to 25, are to be machined.

Bores 27 to provide such recesses, as well as bearing bores 28 for elements such as the roller and shaft 21 and 22, are formed according to an exactly calculated co-ordinate drilling programme determined for all assembly components, starting out from a determined reference point, for example the origin "Z", on a programmable co-ordinate drilling machine. Thereafter, the excess material 26 at each region is removed until a substantially semicircular-section recess, for example 6, is left, the depth of the recess with respect to the adjacent contact surface being smaller than the radius of the pin 7. After final mechanical processing, the assembly members are placed one against the other with insertion of the pins 7 into the recesses 5, 6, 1 5, 16, 22, 23 and 24 and firmly secured together by the bolts 1 2 without manual fitting operations being required. Due to the fact that the diameter of each pin 7 is greater than the depth of the associated recesses taken together, a small gap remains between the members so that the previously required mechanical processing of the entire contact sides can be dispensed with.

It is even possible by reason of the bearing means, for example 3 and 4, to assemble machine frame walls unit by unit in a printing machine between two parallelly arranged assemblies and to join these pre-assembled units together to form a larger unit without manual fitting operations.

Claims

1. A wall assembly comprising a plurality of substantially co-planar wall members which are provided with mounting bores extending transversely therethrough and which bear against each other by way of a plurality of bearing pins each engaged in a respective pair of part-cylindrical recesses provided one in each of two neighbouring edge portions of the members and extending parallelly to the mounting bores, the radius of curvature of each recess being substantially the same as that of the associated pin and the radial depth of each recess being less than the radius of the associated pin.

2. An assembly as claimed in claim 1, comprising a further wall member which is arranged in a plane perpendicular to the plane of the wall members of said plurality and which is mounted on at least one of the wall members of that plurality by way of an inter mediate element and a plurality of pins engaged in further such part-cylindrical recesses in the intermediate element, said further wall member and said at least one wall member.

3. An assembly as claimed in claim 2, wherein the intermediate element is provided at one side thereof with two parallel ones of such recesses and at a side thereof opposite to said one side with a further such recess extending substantially at right angles to said two parallel recesses.

4. An assembly as claimed in claim 1, wherein each of the pins is retained in the respective pair of recesses by means of a bolt extending through a transverse bore in the pin and engaged in aligned bores in the edge portions provided with that pair of recesses, the bolt being threadedly retained in the bore of one of those edge portions.

5. A wall assembly substantially as hereinbefore described with reference to Figs. 1, 3, 5 and 6 of the accompanying drawings.

6. A wall assembly substantially as hereinbefore described with reference to Figs. 8 and 9 of the accompanying drawings.

7. An assembly as claimed in either claim 5 or claim 6 and modified substantially as hereinbefore described with reference to Fig.

9 of the accompanying drawings.

8. A rotary printing machine comprising two spaced wall assemblies each as claimed in any one of the preceding claims and a plurality of rollers mounted in and extending between the assemblies.

9. A rotary printing machine as claimed in claim 8 and substantially as hereinbefore described with reference to Fig. 4 of the accompanying drawings.

10. A method of manufacturing a wall member for an assembly as claimed in claim 1, comprising the steps of providing an oversize wall member blank, defining first and second bore locations in the blank from a common reference point, the first bore locations being in edge regions of the blank, forming a respective cylindrical bore at each of the first and second locations, the bore at each first location having a radius corresponding to that of an associated pin in said assembly, and removing excess material from the blank around part of the bore at each first location to define a respective edge face of the wall member and, from that bore, a partcylindrical recess having depth less than the radius of the bore.

11. A method as claimed in claim 10 and substantially as hereinbefore described with reference to Fig. 2 of the accompanying drawings.