Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D29/00—Independent underground or underwater structures; Retaining walls
  • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
  • E02D29/14—Covers for manholes or the like; Frames for covers
  • E02D29/1409—Covers for manholes or the like; Frames for covers adjustable in height or inclination

Definitions

• the invention relates to a height-adjustable manhole cover for the level adjustment of road caps or manhole covers.
• the manhole covers located in the area of the street or an adjacent sidewalk must first be moved to the level of the provisional covering and adjusted to the changed street level after the wearing layer has been applied.
• the height of the shaft to be changed is so tight in the road covering that is to be covered by a further layer that it either has to be loosened using pneumatic hammers or a very powerful pulling device is used that can be used in the Pull up around the shaft on Strassenbel ag so that it does not tear away.
• shafts of smaller diameter are installed in the streets, which are called street caps.
• the height of these shafts, which are larger in diameter and allow entry, must be adjusted, and often also several times at intervals if different road surface layers are applied one after the other.
• the present invention was therefore based on the object of creating a system for raising the level of road shafts with small and large diameters, which is easy to handle and has no corrosion-sensitive parts and which adjusts the level without destroying the existing road surface around the shaft. It is said to be usable for street caps as well as for manholes larger in diameter.
• a device with the features according to claim 1 is used to solve these problems.
• the advantage of this device is that it essentially consists of only two parts, which together hold a manhole cover lying on top and are almost infinitely variable in shape Height can be changed.
• the height adjustment range is almost half the total height of the two tubular parts, so that it is easily possible to carry out a level adjustment with the same device in each case with road surface layers applied one after the other in time intervals.
• the outer tubular part can in each case be pulled up with a separate device without damaging the road surface, which is particularly important in the case of a modern road construction method, the so-called remix method, in which the road surface is milled and machined in one operation new one is installed. It is also of particular advantage in the case of so-called thin slips that an exact height adjustment is possible in a simple manner.
• the outer tube is only moved or moved axially with a special device. pulled up, this relieves the inner tube and disengages and can be practically resistance-free. be turned down.
• the screw thread therefore has no loaded adjustment function, but rather serves as a support element in each detent position.
• FIG. 1 shows a vertical section through a road section with the device, which is in the lowest position and consists of two tubular parts;
• Fig. 2 is a vertical section through the Einrich. after the final level adjustment
• FIG. 3 shows a side view of the inner tubular part; i. ⁇ . e i n e ⁇ u y c i ü i- ii c ⁇ u ä ⁇ y c 5 «. .. ⁇ i ⁇ . c u i a u i a i v. u i. to the part according to FIG. 4;
• Fig. 5 excerpts to cooperate certain locking means on the outer part and on the inner part;
• FIG. 6 shows a section through the thread having a tooth-shaped projection according to line I-I in FIG. 5.
• the example shown is a so-called street cap, which represents the upper shaft end of a smaller shaft, through which one has access to valves or slides, not shown here, of supply lines laid in the street.
• a support body 2 which is designed as a concrete part or as a cast part and which has a bore 3 in the center through which a part of a valve or spool which is intended for actuation projects upwards into the support body.
• the concrete supporting body 2 has a cylindrical recess 5 with a lower shoulder ring surface 6.
• the continuation of the recess 5 is the smaller diameter bore 3.
• the outer tubular part 9 is supported on the annular disc 7, the length of which is dimensioned such that its upper edge runs approximately flush with the top of a first road surface layer 10 applied to the gravel bed 1.
• the outer tubular part 9 is designed as an internal thread sleeve and has an internal thread 11 consisting of a plurality of turns. This is a special thread with which an adjustment interval which is as large as possible for level adjustment is achieved with a road cap of relatively small diameter with a small thread pitch.
• Each 360 ° dimensioned thread of the internal thread 11 has at least one tooth-shaped projection 12, which in FIG Section plane is shown lying.
• the inner tubular part 13 Arranged within the outer tubular part 9 is the inner tubular part 13 shown as an individual part in FIG. 3, which has only a 360 ° thread 14 at the upper end. In the loaded state, this thread turn 14 engages with the internal thread 11 of the outer tubular part 9.
• Sawtooth-shaped toothing 15 is formed on the upper outer thread edge of the thread turn 14.
• a series of uniform sawtooth-shaped teeth has a tooth flank 16 which is front with respect to the thread pitch direction and which runs essentially radially and vertically and serves as a stop for the correspondingly shaped toothed projection 12 on the outer tubular part 9.
• the internal thread and the one external thread have enough play that a mutual rotation of the two tubular parts 9 and 13 is possible without engagement of the toothing 15 and the tooth-shaped projection 12 of the internal thread, as shown in FIG. 1.
• the inner tubular part 13 therefore hangs with its thread 14 in the internal thread 11 of the outer tubular part, which in the initial position stands on the ring disk 7 below.
• the interaction of the teeth 15 of the inner tubular part 13 with the tooth-shaped projection 12 of the outer tubular part 9 is shown in principle on a larger scale in FIGS. 5 and 6.
• the tooth-shaped projection 12 of the internal thread 11 of the outer tubular part 9 has a flank 17 which comes into contact with the flank 16 of the toothing 15 serving as a stop.
• a further covering layer 18, for example a compensating layer is applied to the first street covering layer 10 and to the level of this new covering layer, the road cap consisting of the two tubular parts 9 and 13 must be raised.
• a hydraulic lifting device not shown in the drawing, which grasps the outer tubular part 9 below the inner collar 19 formed at the upper end in order to pull the tubular part upwards.
• the inner tubular part 13 is pulled up.
• the outer tubular part 9 is pulled up a little above the level of the respective applied road surface layer, namely by the size of the tooth height of the toothing 15.
• the inner tubular part 13 is then removed with the aid of a tool, not shown, which is in radial bores 20 at the top
• the end of the tubular part 13 engages, or comes into engagement with cams arranged at the same point, in the outer tubular part 9, thanks to the engaged thread, rotated downwards until it stands on the lower annular disk 7.
• the example shown here is a height-adjustable street cap, in which the two tubular parts have the special thread, so that sufficiently large adjustment intervals are possible with a small pitch.
• the device described is also suitable in the same way for shafts which are larger in diameter, in which case the tubular parts can have a normal flat thread, since sufficient adjustment intervals are possible due to the larger circumference.
• the device described also has the further advantage that the outer collar normally present in previously known street caps, which is used for lifting with a pimple and as a support on the road surface, is no longer necessary in this device, since the support takes place on the inner tubular part and is pulled up on the inner collar at the upper end of the outer tubular part.
• This non-existent outer collar or shelf has the advantage that, in the case of a shaft lowering, the milling work increasing on Strassenbel ag can be carried out without hindrance. This is because the device can also be handled in a corresponding manner if a level adjustment is to be carried out downwards.

Landscapes

• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Mining & Mineral Resources (AREA)
• Paleontology (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
• Sewage (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4209216

Family Applications (1)

Country Status (5)

Cited By (4)

Citations (4)

Family Cites Families (1)

• 1990
  • 1990-04-24 CH CH138690A patent/CH681819A5/de not_active IP Right Cessation
• 1991
  • 1991-04-17 DE DECH9100089D patent/DE4190850D2/de not_active Expired - Lifetime
  • 1991-04-17 WO PCT/CH1991/000089 patent/WO1991016504A1/de active Application Filing
  • 1991-04-17 EP EP19910907236 patent/EP0478733A1/de not_active Withdrawn
  • 1991-04-17 AU AU75727/91A patent/AU7572791A/en not_active Abandoned
  • 1991-04-17 DE DE4190850A patent/DE4190850C1/de not_active Expired - Lifetime

Patent Citations (4)

Also Published As

Similar Documents

Legal Events