Metal working – Means to assemble or disassemble – With work-holder for assembly
Patent
1988-06-27
1989-10-24
Watson, Robert C.
Metal working
Means to assemble or disassemble
With work-holder for assembly
269910, B23P 1100
Patent
active
048752673
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a means for assembling rectangular display boards of varying, predetermined sizes, and of the type comprising two sign element holders determining the height of the display board, one or more back elements determining the width of the display board and arranged to be rigidly connected to flat outer surfaces of the sign element holders, and sign elements the end portions of which being arranged to be inserted into corresponding grooves in the sign element holders, said holders having substantially L or J shaped cross section with a shank and a foot portion protruding therefrom.
The manufacture of display boards of the type described above has hitherto been extremely time-consuming and complicated, requiring large quantities of material and considerable expense. Even if measurements are taken with great accuracy when assembling the various parts, it is difficult to achieve the desired exactitude with respect to the parts. The back elements must be the same size as the intended display board and, for practical reasons, cannot be kept in stock for all sizes of display boards. They must therefore be measured and cut from larger plates. Both material consumption and waste are thereby high. It has therefore been impossible to save material as desired and to stock complete sets of the various parts.
The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a means enabling display boards of the type described to be assembled quickly and simply while saving both material and expense.
The means according to the invention is essentially characterised by a fixture comprising a flat plate which is somewhat larger than the largest predetermined size of the display boards and which has a plurality of parallel grooves to receive the foot portions of the sign element holders without friction or play, the grooves being arranged in a coordinate system with a first groove located on the y-axis and the remaining grooves being arranged with predetermined distances from the first groove with increasing x-values corresponding to predetermined widths of display boards, and the grooves starting from the x-axis with which one end of a sign element holder placed in a groove is to coincide during assembly, said grooves being sufficiently long to receive sign element holders of varying lengths corresponding to predetermined heights of display boards.
According to a preferred embodiment of the means according to the invention, said grooves are formed in support ribs which are rigidly connected to the plate serving as base. A stop element is suitably mounted at the ends of the support ribs located closest to the operator in order to close, with respect to the plate, the lower end part of the groove of the sign element holder, and, with respect to the plate, the upper end part of the groove of the sign element holder is free for insertion of an angle-shaped back element having a support element intended to retain said sign elements in the finished display board.
The invention will be described further in the following with reference to the accompanying drawings.
FIG. 1 is a plan view of a means according to the invention, with two sign element holders and back elements in positions for assembly.
FIG. 2 is an end view of the means according to FIG. 1.
FIG. 3 is an end view of a support rib of the means according to FIG. 1.
FIG. 4 is an end view of a sign element holder.
FIG. 5 is an end view of a back-piece.
FIGS. 6 to 8 show a sign element which may be included in a display board of the type described.
With reference to FIGS. 1 and 2 it is shown therein a preferred embodiment of the means according to the present invention for assembling rectangular display boards of varying, predetermined sizes. The display boards are of the type comprising two sign element holders 1, 2 of the same length and shape which determine the height of the display board, one or more back elements 3, 4 determining the width of the display board and arranged to be rigidly connected, preferably
REFERENCES:
patent: 2305124 (1942-12-01), Wilson et al.
patent: 2811186 (1957-10-01), Honza
patent: 3299920 (1967-01-01), Koenigshof
patent: 4154436 (1979-05-01), Sellers
patent: 4541618 (1985-09-01), Bruno
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