DE1910692C - Plain bearings for heavy structures such as bridges - Google Patents

Description

3 4

in the manner of a grid arranged columnar Er spacing of the elevations so that when unlifted 14, the outer dimensions of the lower plate 2 have changed here, the circular cross-section ben. The side edge 4 of the base plate is only used and a given maximum load the pressure on each the cover to the outside. It is not matched to the individual end face of the elevations 14 and not capable of reaching a desired size.

Exercises 14 overlying mat 6 against displacement In the training according to F i g. 4 point the here

to secure. As can be seen from the representation according to FIG. 2 columnar arranged offset from one another

and 3 results, the mat 6 is due to the pressure of the elevations 14 α square cross-section.

Top plate 8 in the area of the support on the end face. 5 and 6 are in the

Chen of the elevations 14 pressed together, and the elevations 14 b prism-shaped recesses 14c

"" V between the end faces located sections 23 are provided, with the help of which the load-bearing end face

• he mats form bulges 22 which are reduced in size without affecting the overall arrangement of the

acal side surfaces 18 of the surveys, in particular surveys requiring a change,

anchor them at the end face edges 20. The lower plate according to Fig. 7 can be particularly

Mat 12 lies evenly with its upper side 15 easily produced by machine because the respective

on the underside 10 of the top plate. desired changes to the dimensions of the front

The ratio of the size of the end faces of the clean surfaces 14 d of the columnar elevations through

len-shaped elevations 14 and the free space widening of the separating the elevations

16 between the elevations can be duich level grooves 28 and, if necessary, bevel of the tion of the size of the individual end faces and the ao side faces 30 can be achieved.

1 sheet of drawings

Claims (2)

i 910 692 4 1 2 or the advantages of the pure plastic intermediate layer Patent claims: - partially repealed. Also according to the USA. 1. Plain bearings for heavy load-bearing structures, such as bridging documents 3 033 623, to arrange indentations in a top plate with a metal plate connected to its fabric, the underside of a flat sliding surface, and one underneath, which was used to solve the problem described in Commercial intermediate layer made of polytetrafluoroethylene knew woven or knitted mats made of Pülyte- and a lower plate carrying the intermediate layer trafluoroethylene effectively and with very little with a profiled top to secure the intermediate effort Gegiu lateral displacement on the lower leg layer against lateral shifts, since plate of sliding bearings for Heavy load-bearing structures are characterized by the fact that in training, it is unsuitable because the depressions only serve to dicdung the intermediate layer as a woven or knitted metal plate and fabric together to form a mat (11), the top of the lower plate (2) with the body as constant as possible Thickness too connector-like Circular, columnar elevation, which is then interchangeably arranged in a housing (14) with a circular or polygonal cross-section, preferably a cylindrical housing,
is provided. 15 The invention is therefore the object of 2. Plain bearing according to claim 1, characterized in that, in the case of highly stressed structures, the polyte characterizes that the end faces of the päulenför- trafluoräthylen existing intermediate layer moderate elevations (14) to prevent prism-shaped Aus ^ pa slide bearing from slipping. Through the achievements (14c), the object is achieved in that at so formation of the intermediate layer as a woven or Mat knitted the top of the lower plate with grid-like, columnar elevations is provided with a circular or polygonal cross-section. The invention relates to a plain bearing for heavy By concentrating the bearing load on the Structures, such as bridges, consisting of an upper surface as the end faces of the elevations is the thin plate with a flat sliding surface on its underside, one. knitted mat of polytetrafluoroethylene fabric between the underlying Intermediate layer made of polytetrafluorine. see top plate and bottom plate pinched and ethylene and one of the intermediate layers tp> »ends under- securely held. The practical operation has it Plate with a profiled top to secure the proven that no additional anchor elements Interlayer against lateral shifts. 30 and no adhesives to secure the It is known that interlayer panels made of Polyschsnlage are necessary. to use tetrafluoroethylene (German interpretation- An additional advantage of this training of the bot- document 1 263 805). The plastic plates are denplatte still results from the possibility of Anvon the lower plate carrying it, rearranged in a frame-like manner, and the size of the end faces r>, r closed in a columnar manner. Through the frame, the well-known cold 35 gene elevations are to be dimensioned in such a way that in the case of Gege-Flisßen such PolyteifailüOrainylenplatten with large outer dimensions of the base plate, with Load can be prevented. For further details, see, for example, in the case of already existing structures, a tion of the plate is the upward-facing area of the desired specific pressure load of the individual Lower plate on which the plastic disc rests, face can be achieved. Is z. B. with a base plate profiled or roughened. For these bearings, for a given size and a given maximum load, the each bearing dimension and each load size a bearing surface too large to accommodate the clamping of the special base plate can be made. Then to achieve the necessary clamping pressure even in mats British patent specification 961 823 is a similar one, it is sufficient to measure the size of the end faces of the elevations Described plain bearings. The polytetrafluoroethylene and the distance between the elevations The plate is exposed here on a roughened surface 45 to reduce the desired load the lower plate, which dar't to achieve the lateral displacement of the individual end faces. The end faces ben the plastic plate should prevent. Against that of the columnar elevations can prismatic flow tendency the plastic plate do not have any suitable recesses. This allows serial production provided, which is why this camp is only suitable for moderate elevations of the same size suitable for low loads. 50 loaded sub-plates depending on the respective load It has already been adjusted in place of the homogeneous nits. Woven or knitted polytetrafluoroethylene sheets The drawings are used to provide Mat'.en made of polytetrafluoroethylene used; this is described by way of example of the invention. It shows
However, in the conventional design, in particular, a lower plate partially covered by an intermediate layer, in particular the upper plate and the lower plate of the 55 lower plate in plan view,
Plain bearings, considerable difficulties because the F i g. Figure 2 is a section in the plane of line 2-2 in relatively thin mats, even if the edition Fi g. 1, surfaces of the upper or lower plate are profiled. Fig. 3 shows a section in the plane of the line 3-3 in ren, slightly mixed between the support surfaces Fig. 1, or because of their small thickness for the formation of folds 60 Fig. 4 a part of a different formation tended. According to US Pat. No. 3,068,053 in the form of a bottom plate in plan view,
the Polytetrafluoräthyleiigewebe a metal wire screen- Fig. 5 a part of a further training lctt to be woven in, which then in place of the polytetrafluorine form of a lower panel in the plan view,
Ethylene threads pressed into depressions in the bearing. Fig. 6 is a section in the plane of the line 7-7 in is to keep the mass, could at least 65 Fig. 5 and in the case of bearings of the type in question not enforced- Fig. 7 in a three-dimensional representation zcii, wcM the metal wire skeleton also from the bearing pressure formation form of a lower plate,
was detected and either did not withstand it. From Fig. 1 it can be seen that the lower slat2