Technical field

The technical solution relates to the structural arrangement of the carrier frame and the housing, for closing (cover-up) of the technical (inspection) of the opening, such as a hole for access to the meter, water meter, water valve, and the like, created in the wall and/or ceiling construction.

Background Art

The various design of the supporting frames and covers is known from a wide range of files. One of the representatives of the state of the art is file DE 92 10 905 Ul, where the cover plate is secured on a frame by screws. Screwing of the cover plate, or unscrewing in the correction and revision works is tedious, threatens to damage the cover when too strong tightening of the screws.

Furthermore, it is known from the documents EP 779 397 Bl the cover of the inspection opening, which contains a frame located in the opening and the cover plate that covers the frame and is disassembly connected with it. The cover plate is in the front surface provided with a control element and has a peripheral part, protruding from its front surface to the back toward the frame and forming a selvedge of the frame. The frame contains in the area of one side of the cover plate at least one latch, which is by the spring flexibly stored in the storage part. The disadvantage of this technical solution is the fact that to the opening, removing the plate it is the need of special tool and furthermore, that this type of cover plate quite significantly protrudes above the surrounding surface.

Another type of solution is the construction of the support frame having in cross section the shape of the letter "L" and the cover plate, which is stored in the opening of the support frame and which is on one side provided with a sliding handles catching for the protrusions of the support frame. The disadvantage of such solution is that when opening the cover there is once again the need for tools, in this case, e.g. a screwdriver, which pushes the handle from the protrusions. There may occur breakage of the handle and thus irreversible damage to the door.

Another known solution is described in the utility model no. 17513, where the opening and locking of the cover is solved using the spring-loaded flaps, which are controlled by the tiltable control components with catching elements. This solution has the advantage in that for opening the cover requires no tools, but a disadvantage in that the tiltable control components can easily break, the system is quite structurally demanding and therefore expensive.

Disclosure of the invention

This technical solution is designed to solve the above-described deficiencies associated with the opening or closing of the cover of the technical opening, so that for such operations there was no need of special tools to have a cover together with a frame formed into monolithic surface without protrusions and hollows and catching elements along with other structural elements allowing opening and closing of the cover are placed on the inner side of the cover or the frame.

This is achieved by the constructional arrangement of the supporting frame and the cover of the technical opening in the wall or ceiling of the construction, where in the door of the cover there is formed an opening size adapted for inserting credit cards or similar document. On the inner side of the door on both sides of the opening for the card there is positioned at least one rider with the advantage in the shape of the letter "U" connected to the locking rod when for the locking rod there is in the internal segment of the frame located a housing, in which there is inserted part of the locking rod in position "closed". The rod is pushed in the housing by pushing spring.

The rider, preferably in the shape of the letter "U", has in the area of the entry of the card a slant, which is pushed by the card when inserting into the opening. This initiates the movement of the rider, when the second end of the rider on the opposite side of the opening for the card ejects the pushing spring out of the case and is possible to open the door. When pulling the card out of the opening the rod is returned into the case by the pushing springs.

Brief Description of the Drawings

The technical solution will be further clarified using a drawing, where on fig. 1 there is shown the cover of the technical opening from the outer side with the marking opening for the card, in figure 2 there is illustrated the mechanism for opening from the inner side, in fig. 3 there is shown a detail of the structural arrangement of the rider, the locking rod and pushing spring in the area of the opening for the card in the axonometric view, fig. 4 shows the detail of the structural arrangement of the rider, the locking rod and pushing spring in the area of the opening for the card in the front view, and fig. 5 shows the cut through the mechanism.

Modes for carrying out the invention

In the carrier frame 8 there are by the help of hinges placed the door1, in which is formed an opening 2 for the card 3. On the inner side of the cover of the technical opening there are on the segment of the frame 9 against each other fixed housings/cases 10 for securing the rods 7. The rods 7 are in the housing 10 in the closed state fixed by means of the pushing springs 6. On the sides of the opening 2 there are located the riders 5 in the shape of the letter "U" when one end of the rider 5 extends with its end into the opening 2 and at this end there is formed a slant ϋ and the other end is connected with the rod 7 at the opposite end of the opening 2 between the pushing spring 6 and the housing 10.

When inserting the card into the opening the card pushes on slants, pushes them away it and the other end of the rider initiates the movement of the rods to each other, thereby to eject the rods from the housings. By this the door is ready to open whether by pushing on the opposite end on the door hinges, or by pulling the card or by any other known manner. When you eject the card from the opening the pushing springs return the rod back into the housings and the riders to the initial position relative to the opening.

Industrial applicability

A cover of the technical opening according to this technical solution is primarily intended to be used for covering of the openings in walls of buildings or other structures where it is required to maintain access to the distribution systems of energy, water or other media.