DE102006012764A1 - Cavity covering for light well on cellar windows, has covering having holed covering sheet, which passes downwards into bars and is provided with reinforcing bars, where reinforcing bar is arranged parallel to shorter side of covering sheet - Google Patents

Abstract

The covering has a holed covering sheet (1), which passes downwards into the bars (10,11,12) and is provided with reinforcing bars at its lower side. The reinforcing bars extend below the covering sheet between bars which are opposite to each other. The covering sheet is rectangular and out-arranged, and the reinforcing bar (6) is arranged parallel to the shorter side of the covering sheet. An independent claim is also included for a method for manufacturing a covering sheet.

Description

The The invention relates to a manhole cover for light wells and / or ventilation shafts Basement windows.

Such a manhole cover is for example from the DE 201 11 267 U1 known. Such manhole covers should allow the passage of light and air to the basement window. In most cases it is also required that the manhole cover should prevent the entry of insects and small animals to the basement window. In the known manhole cover the tread resistance and light or air permeability is ensured by means of a grid, while a grid laid on the grid prevents the entry of small animals and insects.

task It is the object of the invention to provide a manhole cover which can be produced cost-effectively with low material expenditure specify that as well meets the known requirements for manhole covers.

The Invention solves this task by a perforated cover plate, which in his Edge areas merges into downwardly angled webs and on its underside provided with reinforcing rods is that under the cover plate between opposite Ridges extend. The with holes for the Passage of light and air provided cover plate is with the webs one piece trained and can therefore in a little expensive way by means Punching and bending measures getting produced. The necessary Stiffness and tread resistance is on the one hand by the webs itself and on the other hand by the at the bottom of the cover plate arranged reinforcing rods achieved. With appropriate dimensioning the manhole cover according to the invention even made navigable.

Also if different shapes and geometries for the manhole cover according to the invention conceivable and possible are due to the mostly rectangular shape of the air / light shafts to be covered one embodiment preferred in which the cover plate designed substantially rectangular is and the reinforcing bars in essence parallel to the shorter one Side of the cover plate are arranged. This has the advantage that the Reinforcing bars only one have to bridge relatively short distance and therefore need to be made less stable.

By the measure, that the webs opposite the cover plate angled substantially at right angles downwards are, get For a given web width maximum load capacity.

In Embodiment of the invention is provided that the voltage applied to the reinforcing bars Webs with mounting holes for the Attachment of reinforcing rods provided are. The mounting holes can on the webs in the manufacture of the cover plate in a simple manner to be formed with. You get so with little effort an attachment for the reinforcing rods.

In a preferred embodiment are the reinforcing rods as sheet metal stampings designed. So they can be produced inexpensively with little effort.

If the reinforcing rods at their Ends each with a stop to rest on the respective web the cover plate and each with a projecting beyond the stop Latch for snapping into the respective attachment hole of the web provided they can be taken care of in a particularly inexpensive way fasten to the cover plate. Therefor the latching lug of the one end of the reinforcing rod in the associated mounting hole of the a bridge inserted, with the adjacent stop a prevents too much penetration of the latch. Then the other one Latch at the other end of the reinforcing rod under elastic Preload of the reinforcing rod in the opposite Mounting hole of the opposite Stegs locked. The reinforcing rod is now in the longitudinal direction between the two webs of the cover plate due to the respective Plant pinched his two outer stops and due to latched in the mounting holes locking lugs secured against lateral displacement.

In A preferred embodiment is the manhole cover made of stainless steel. This material is both corrosion resistant and on the other hand for The necessary punching and bending operations are outstandingly suitable. Furthermore results in an aesthetic pleasant look.

By the measure that the cover plate is provided with a plurality of air holes whose inside diameter is between 1.5 mm and 5 mm, the access of small animals and insects is effectively prevented due to the small hole size and on the other hand due to the large number of holes sufficient Passage of light and / or air allows. The air holes are here for the sake of simplicity only so designated and can of course also be intended for the exclusive passage of light. Preferably, strip-shaped areas of the cover plate, along which the reinforcing rods are arranged, free of air to be punched.

at The need for the manhole cover according to the invention be improved by using the cover plate with passages for example air hoses or water hoses is provided. The manhole cover according to the invention leaves due their design the expert here extensive freedom of design.

The Invention is further improved by the measure that at a substantially rectangular cover plate three support bars to support the Manhole cover in an upper edge area of the shaft walls of a essentially rectangular shaft and a reinforced bridge bridge to bridge a Schachtbereiches are arranged without shaft wall.

The in connection with basement windows commonly used air and light wells today are mostly trough-shaped configured, wherein of a substantially rectangular floor area three Walls behind protrude above. Instead of the fourth wall is an opening to Basement window. At the the basement window or the house facing Side of the shaft has no upper because of the missing wall Edge on a manhole cover could be supported. The manhole cover is lying therefore, only on the upper edge areas of the remaining three walls. Because of the lack of support the manhole cover would come in case of heavy stress by a person walking over or about that driving vehicle to a stronger Bend the unsupported side the manhole cover. The aforementioned measure according to the invention now reinforces the bridge web arranged on this side of the manhole cover, to keep the degree of deflection within tolerable limits.

Basically, the reinforcement of the bridge footbridge made by a larger material thickness become. This would However, relatively expensive production measures require. For simplification The production is therefore proposed that the gain by one opposite the supporting webs larger dimension of the bridge bridge takes place. The width of the bridge bridge in the vertical direction is thus easily enlarged, whereby the bridge bridge stronger Withstand loads or less at given loads. The broadening of the bridge footbridge does not require additional Production measures for example, when punching out the material for the cover plate For example, a narrow or wide bridge can be created in the same operation become. The subsequent bending process is at a wider Footbridge not more elaborate than a narrower one. Only the material consumption will be raised.

In a preferred embodiment the invention are designed as sheet metal stampings reinforcing rods in their the bridge footbridge facing end region by a larger width to the enlarged dimensions of the bridge footbridge customized. This will increase the stiffness of the unsupported edge area the manhole cover still improved.

The stability the manhole cover can be further improved by a free end area of the bridge web with more than his length provided spaced apart slots and so angled inwards, that the reinforcing rods protrude into the slots. Thus, the reinforcing rods clamped in the slots can not tip over laterally, this leaves their area always parallel to the force introduced from above and can this with the lowest possible deflection support.

• – ein Blech in Form einer Abwicklung des Abdeckblechs und der Stege wird ausgestanzt;
• – die Luftlöcher, Befestigungslöcher, Schlitze und sonstigen Öffnungen werden in das Blech eingebracht;
• – die seitlichen Stege werden durch Abwinkeln der Randbereiche des Blechs geformt:
• – die ausgestanzten Verstärkungsstäbe werden auf der Unterseite des Abdeckblechs der Befestigungslöcher der seitlichen Stege eingerastet.

In an advantageously feasible with little effort method for producing a manhole cover, the procedure is preferably as follows:

• - A sheet in the form of a settlement of the cover plate and the webs is punched out;
• - The air holes, mounting holes, slots and other openings are introduced into the sheet;
• - The lateral webs are formed by bending the edge regions of the sheet:
• - The punched reinforcing rods are snapped onto the underside of the cover plate of the mounting holes of the lateral webs.

This Procedure can be done with a few simple operations and can on appropriate Machines are easily executed fully automatically. In certain circumstances can the first two steps also in reverse order carried out become. The reinforcing rods can also punched out together with the settlement of the cover.

One embodiment The invention will be explained in more detail with reference to the drawings. The Figures show in detail:

1 a development of the cover plate of a manhole cover according to the invention in a plan view;

2 a side view of the manhole cover from the rear side after forming the bridge web by bending;

3 : the manhole cover of 2 in a side view from the narrow side;

4 a side view of the same manhole cover from the front;

5 : a side view similar 4 with an arrangement of the reinforcing rods (cover plate with bridge bridge dashed);

6 : a view similar 5 from the narrow side;

7 : a view similar 5 and 6 but seen from the bottom;

8th : a detail A off 6 ;

9 : a detail B from B off 6 ,

How best in 1 detects, is a cover plate 1 a manhole cover according to the invention with a plurality of tiny air holes 2 provided for the passage of light or air in a not shown cellar window. In the present embodiment, the air holes 2 square and have a side length of 2 mm. But they can also be round and preferably have a diameter between 1.5 and 5 mm. In the present embodiment, the inside diameter of the air holes 2 so small to prevent the passage of insects and other small animals into the shaft and through the cellar window into the house.

In deviation from the present embodiment, the cover plate 1 in addition to the air holes 2 have further holes or passages, for example for air hoses or water hoses.

The cover plate is in the manufacture of manhole cover according to the invention with the in 1 shown outlines punched from a larger piece of stainless steel sheet. Subsequently, the air holes 2 and further openings in the cover plate 1 brought in. In particular, in the rear edge area 3 and in the front edge area 4 a plurality of oppositely disposed, rectangular mounting holes 5 brought in. The mounting holes 5 serve in the finished manhole cover for attachment of reinforcing rods 6 whose location in 1 indicated by dashed lines. How to best in 6 detects, the reinforcing rods exist 6 from stamped sheet metal parts, which are also produced by punching out of a larger stainless steel sheet.

After punching out the cover plate 1 Be next to the air holes 2 and the mounting holes 5 in a free end area 7 a variety of slots 8th brought in.

In the further production will be in the rear and front edge areas 3 . 4 as well as in the lateral edge areas 9 by bending the stainless steel sheet angled webs 10 . 11 . 12 educated. To form the lateral support webs 10 The sheet is first at the bending edges 13 and then at the bending edges 14 bent. The bent lateral support bars 10 you can best in 3 detect.

Also the front support bar 11 is bent by bending at the bending edges 15 and 16 ( 1 ) generated. The finished front support bar 11 After bending, it is best to see in 4 ,

The rear bridge bridge 12 is made by bending the rear edge area three times 3 at the bending edges 17 . 18 and 19 generated. The finished rear bridge dock 12 is in 2 from the back, in 3 in profile and in 4 to see from. It also shows that all four bridges 10 . 11 . 12 opposite the surface of the cover plate 1 bent at right angles downwards. The extent of the bridge web is 12 from the plane of the cover plate 1 vertically down about three times the vertical dimensions of the support webs 10 . 11 , The bridge web not supported on the light shaft 12 Due to its larger dimensions, it can absorb a bending moment occurring under load.

How to best in the 8th and 9 recognize, have the reinforcing rods 6 at their outer ends 20 . 21 one catch each 22 . 23 For locking in the mounting holes 5 the front and rear bars 11 . 12 are determined. Furthermore, in the field of locking lugs 22 . 23 at least one stop each 24 . 25 provided for attachment to the respective web 11 . 12 is determined. In the 3 and 4 you can also see the free end area 7 with the slots 8th , This in 6 dashed free end area 7 embraces the broad end 21 the reinforcing rods 6 to prevent slippage or bending of the reinforcing rods and thus to improve the overall stability of the manhole cover according to the invention. The broad end 21 is due to the increased dimensions of the rear bridge web 12 customized.

How to best in the 1 and 7 recognizes that run on the cover plate 1 mounted reinforcing rods 6 parallel to the lateral edge areas 9 and the lateral support bars 10 the cover plate 1 after making the cover sheet 1 become the reinforcing rods 6 on the underside of the cover plate 1 in the mounting holes 5 and the slots 8th engaged.

This is in a little complicated manner both in terms of the material used and in Be In addition to the required work steps, a manhole cover was created which is resistant to treading and traffic, does not corrode and ensures the access of light, air or supply hoses to the cellar.

1

Cover plate

2

air holes

3

rear border area

4

front border area

5

mounting holes

6

reinforcing bars

7

free end

8th

slots

9

lateral border areas

10

lateral supporting webs

11

front supporting web

12

rear footbridge

13

bending edge

14

bending edge

15

bending edge

16

bending edge

17

bending edge

18

bending edge

19

bending edge

20

narrow The End

21

broad The End

22

locking lug

23

locking lug

24

attack

25

attack

Claims (14)

Manhole cover for light shafts and / or ventilation shafts on basement windows, characterized by a perforated cover plate ( 1 ), which in its peripheral areas ( 3 . 4 . 9 ) in downwardly angled webs ( 10 . 11 . 12 ) and on its underside with reinforcing rods ( 6 ) located below the cover plate ( 1 ) between opposite webs ( 11 . 12 ). Manhole cover according to claim 1, characterized in that the cover plate is designed substantially rectangular and the reinforcing rods ( 6 ) substantially parallel to the shorter side of the cover plate ( 1 ) are arranged. Manhole cover according to claim 1 or 2, characterized in that the webs ( 10 . 11 . 12 ) opposite the cover plate ( 1 ) are angled substantially at right angles downwards. Manhole cover according to claim 3, characterized in that the reinforcing rods ( 6 ) adjacent webs ( 11 . 12 ) with mounting holes ( 5 ) for the attachment of the reinforcing rods ( 6 ) are provided. Manhole cover according to one of the preceding claims, characterized in that the reinforcing rods ( 6 ) are designed as sheet metal stampings. Manhole cover according to claim 5, characterized in that the reinforcing rods ( 6 ) at their outer ends ( 20 . 21 ) each with a stop ( 24 . 25 ) for attachment to the respective web ( 11 . 12 ) of the cover plate ( 1 ) and each with an over the stop ( 24 . 25 ) protruding latch ( 22 . 23 ) for locking in the respective mounting hole ( 5 ) of the bridge ( 11 . 12 ) are provided. Manhole cover according to one of the preceding claims, characterized characterized in that it consists of stainless steel. Manhole cover according to one of the preceding claims, characterized in that the cover plate ( 1 ) with a multitude of air holes ( 2 ) whose clear width is between 1.5 mm and 5 mm. Manhole cover according to one of the preceding claims, characterized in that the cover plate ( 1 ) is provided with passages for example for air hoses or water hoses. Manhole cover according to one of the preceding claims, characterized in that on a substantially rectangular cover plate ( 1 ) three supporting bridges ( 10 . 11 ) for supporting the manhole cover in an upper edge region of the shaft walls of a substantially rectangular shaft and a reinforced bridge web ( 12 ) are arranged for bridging a shaft area without shaft wall. Manhole cover according to claim 10, characterized in that the reinforcement in a relation to the support webs ( 10 . 11 ) larger dimension of the bridge web ( 12 ) in the vertical direction. Manhole cover according to claim 11, characterized in that the reinforcing rods designed as sheet metal stamped parts ( 6 ) in their the bridge bridge ( 12 ) facing end regions ( 21 ) by a larger width to the enlarged dimensions of the bridge web ( 12 ) are adjusted. Manhole cover according to claim 12, characterized in that a free end region ( 7 ) of the bridge bridge ( 12 ) with slits spaced apart along its length ( 8th ) and is angled inwards so that the Reinforcing rods ( 6 ) into the slots ( 8th protrude). Method for producing a manhole cover according to one of the preceding claims, characterized by the following method steps: - a metal sheet in the form of a development of the cover plate ( 1 ) and the webs ( 10 . 11 . 12 ) is punched out; - the air holes ( 2 ), Mounting holes ( 5 ), Slots ( 8th ) and other openings are introduced into the sheet; - the front, rear and side bars ( 10 . 11 . 12 ) are made by bending the edge areas ( 3 . 4 . 9 ) of the sheet formed; - the punched reinforcing rods ( 6 ) are placed on the underside of the cover plate ( 1 ) in the mounting holes ( 5 ) of the front and rear webs ( 11 . 12 ) engaged