AT16170U1 - Manhole cover with two lids arranged one above the other - Google Patents

Abstract

In a manhole cover with two superimposed, pivotally mounted lids, an inner lid (4) and an outer lid (5), both lids are provided with a lock (6, 9), wherein at least the lock (6) of the outer lid (5) of outside only with a key is actuated. Both locks (6, 9) have actuated from the inside without a key actuators (7,10). As a result, both covers (4, 5) can be opened from the inside without a key.

Description

Description The invention relates to a manhole cover with two lids arranged one above the other, an inner lid and an outer lid, both of which are provided with a lock, wherein the lock of the outer lid can be actuated from the outside only with a key.

Also, the inner lid can only be opened with a key from the outside.

It is often necessary to protect public institutions from outside interference. It is therefore necessary to equip manhole covers with locks that can be opened from the outside only with a key.

In known manhole covers, in particular those with two superimposed lids, there is a risk that the lids of inside persons, e.g. Doing maintenance work can not be opened if the keys have been forgotten or lost.

The invention has set itself the goal of creating a manhole cover, the two lids are open from the inside without a key.

This is achieved in a manhole cover of the type mentioned in that both locks are actuated from the inside without a key and the internal actuator of the lock of the outer cover is located within reach of a man with only slightly open inner lid.

In a manhole cover according to the invention, both covers can be opened from the bottom, the shaft access, keyless and thus a disembarkation is possible at any time in emergencies.

In a preferred embodiment of the invention is slightly open inner lid and locked lock the inner lid this connected to the outer cover via locking bolt.

As a result, when lifting the inner lid of the outer lid is raised.

To facilitate the lifting attack on the inner lid upwardly acting gas springs.

On the outer cover attack its lifting supportive lifting springs.

The invention with reference to an embodiment shown in the drawings, to which the invention, however, is not limited, described in more detail. FIG. 1 shows a section through a manhole cover according to the invention, wherein both covers are closed; FIG. FIG. 2 shows a section through the manhole cover with the inner cover slightly open; FIG. Fig. 3 is a section through the manhole cover with both lids raised; and Figure 4 is a perspective view of the manhole cover with the lids raised.

According to the drawings, a concrete ring 2 is placed on a shaft opening 1, with which a manhole cover 3 is screwed. The manhole cover 3 has two covers, an inner cover 4 and an outer cover 5. Both covers 4, 5 are pivotally mounted with respect to the shaft opening 1, wherein the type of storage for the invention is not essential and therefore will not be described.

The outer lid 5 is provided with a lock 6, that inside an actuator 7 and outside an actuator 8, in the example depending on a handle. The Betätigungsor- gan 8 can be operated with a key. The inner lid 4 has a lock 9 with an inner actuator 10 and an outer actuator 11.

At the inner lid 4 engage gas springs 12, on the outer lid 5 lifting springs 13.

With the lock 9 cooperating locking bolt 14 can engage in guides 15 on the outer cover 5.

Opening of the manhole cover from the inside is possible in the following way: By operating the lock 9, the inner cover 4 is unlocked and simultaneously pressed by the gas pressure springs 12 in the height against the outer cover 5. This is done by the exiting without effort. Subsequently, the lock 9 of the inner lid 4 is blocked again and thereby the locking bar 14 is inserted into the driver guides 15 of the outer lid 5 and thus the inner lid 4 secured.

In this position, the inner lid 4 can now reach through the space created up to the lock 6 of the outer lid 5 and unlock it. Now only by lightly pressing the two covers 4 and 5 are opened together until they engage in a position about 64 ° open position to disembark.

Now, the lock 9 of the inner lid 4 is unlocked, thereby releasing the locking bar 14 of the guides 15 of the outer lid 5 again. Now the inner lid 4 is closed and locked by locking the lock 9. It can thus be opened from the outside only by means of a matching key.

The outer lid 5 is also closed and locked with the lock 6 fixed and can therefore only be opened by means of a matching key.

The invention is by no means limited to the illustrated embodiment, the skilled person can rather change many technical details within the scope of the invention.

Claims (4)

claims 1. manhole cover with two superimposed, pivotally mounted lids, an inner lid (4) and an outer lid (5), both of which are provided with a lock (6, 9), wherein the lock (6) of the outer lid (5) from the outside can only be actuated with a key, characterized in that both locks (6, 9) actuated from the inside without a key actuators (7,10). 2. Manhole cover according to claim 1, characterized in that when the inner lid (4) and locked lock (9) of the inner lid (4) of this with the outer cover (5) via locking bolt (14) is connected. 3. Manhole cover according to claim 1 or 2, characterized in that the inner cover (4) acting upwardly acting gas pressure springs (12). 4. Manhole cover according to one of claims 1 to 3, characterized in that the outer cover (5) attacking the lifting supportive lifting springs (13). For this 3 sheets of drawings