Shaft system with one small shaft

Abstract

The shaft system includes a small shaft into which, for example, fiber optic and / or underground cables can be inserted, which can be connected in the shaft to outgoing fiber optic and / or underground cables, with a shaft cover that closes the top of the shaft. is characterized by that a circular cover is inserted into the manhole cover, which covers the access opening to the interior of the manhole, and that the cover is rotatable between a locking area in which the cover is locked against removal and a release point in which the cover can be removed from the manhole cover.

Description

[0001] The invention relates to a shaft system with a small shaft into which, for example, fiber optic cable and / or Underground cables can be inserted into the shaft, which can be connected to outgoing fiber optic cables and / or underground cables, and with a shaft cover that closes the top of the shaft.

[0002] Such a small shaft is disclosed in DE 10 2023 100 475 A1. In this shaft, the shaft walls are made of plastic and are ribbed, giving them high stability. The small shaft is designed, for example, to connect incoming fiber optic and / or underground cables with outgoing fiber optic and / or underground cables. The installation work is carried out from above with the shaft cover removed, without requiring a technician to enter the shaft to perform the work inside. In this known shaft, the shaft cover is attached to the shaft with several screws, which must be loosened and then retightened each time the cover is removed. This is a complex and cumbersome process that significantly increases the installation time.

[0003] The present invention is based on the objective of providing a shaft system with a shaft of the type under consideration, in which access to the interior of the shaft is made faster and easier.

[0004] This problem is solved according to the invention by the features of claim 1.

[0005] Advantageous embodiments of the invention are characterized in the dependent claims.

[0006] The invention provides that a circular cover is inserted into the manhole cover, which is preferably attached to the manhole with screws or can be formed integrally with the manhole walls. This circular cover covers the access opening to the interior of the manhole. The cover is rotatable between a locking position, where it is secured against removal, and a release position, where it can be removed from the manhole cover. With this design, to open access to the interior of the manhole, the circular cover simply needs to be rotated from the locking position to the release position, where it can be removed from the manhole cover, lifted out, or pried off.To rotate the lid between a locking position and the unlocked position, the lid can be provided with a central actuating pin, which may have a non-circular, for example hexagonal, shape, to which a corresponding lever can be attached for rotating the lid. Alternatively, the lid can, for example, be provided with two opposing indentations on its upper surface, allowing the lid to be rotated by hand without any tools.

[0007] In any case, the circular cover can be removed quickly and easily and replaced after assembly work has been completed, thus significantly reducing the workload.

[0008] It is advantageously proposed that the cover be provided on its underside with a radially outwardly projecting locking hook, which also extends obliquely downwards from the underside of the cover, and that the cover rests on an annular inner projection of the manhole cover, with the locking hook engaging under the annular inner projection of the manhole cover in the locking area. In this embodiment, the cover is permanently fixed in the manhole cover as long as the locking hook is in the locking area. In a further embodiment of the invention, it is also proposed that the annular inner projection of the manhole cover has a bulge at the unlocking point, in which the locking hook no longer engages under the annular inner projection of the manhole cover, thus clearing the way for the locking hook to remove the cover.

[0009] Furthermore, it is proposed that the lid have a lateral indentation at the release point and the manhole cover have a recess at the adjacent edge into which, for example, a pin-shaped tool can be inserted to pry the lid out of the manhole cover. However, a technician can also accomplish this with their fingers.

[0010] Removing the lid from the manhole cover is further facilitated by the fact that the lateral indentation on the lid and the recess on the adjacent edge of the manhole cover can also be provided at the opposite location, offset by approximately 180°.

[0011] It can also be advantageous to provide a stop in the locking area of ​​the cover on the annular inner projection of the manhole cover, against which the locking hook can be easily released and engage. A stop for the locking hook should also be provided at the release point.

[0012] Furthermore, in one embodiment of the invention, the manhole cover may have an internally hollow, open-bottomed extension on its upper surface, into which the lid is inserted and which contains the access opening to the interior of the manhole. This extension may be integrally formed with the manhole cover using plastic injection molding and may have a cubic or, for example, circular-cylindrical shape. Since the manhole is embedded in the ground and the manhole cover, which is screwed to the manhole, is flush with the surrounding surface, the lid, if the extension is formed on the rest of the manhole cover, is located, for example, 10 or 20 cm above the ground surface, thus better protecting the manhole from penetrating water or dirt particles in the area of ​​the manhole cover.

[0013] In an alternative embodiment of the invention, the manhole cover has a continuously flat shape with a plate-shaped top surface into which the lid is inserted and which contains the access opening to the interior of the manhole. The manhole cover can be formed integrally with the manhole walls or screwed on.

[0014] Further details of the invention will become apparent from the following description of two embodiments and from the drawings.

[0015] This shows: Fig. 1 a first embodiment of the shaft according to the invention in an exploded view; Fig. 2 the composite shaft of the Fig. 1; Fig. 3 the shaft cover of the shaft; Fig. 4. A view of the manhole cover on an enlarged scale; Fig. 5 the underside of the manhole cover of the Fig. 4; Fig. 6 the area of ​​the locking hook of the manhole cover in the release position; Fig. 7 the releasable locking of the locking hook in the locked position; Fig. 8 the recess of the manhole cover at the edge of the lid. Fig. 9 an exploded view of a second embodiment.

[0016] Fig. Figure 1 shows the components of a first embodiment of the small shaft according to the invention in an exploded view. The small shaft 1, which can, for example, have dimensions of 410 mm wide x 220 mm deep x 400 mm high, is made of a plastic such as foamed polycarbonate and is preferably manufactured in one piece using a plastic injection molding process. The shaft walls are provided with ribs, which gives the shaft high stability.

[0017] The shaft cover 2 consists of a ribbed base plate and a cubic extension 3 integrally connected to it, which forms the access opening to the interior of the shaft 1. The hollow extension is closed at its top by a circular lid 4, which can be removed as described below when work needs to be carried out in the shaft 1. A freestanding pin 5 is formed in the center of the lid 4 ( Fig. 4), with which the lid can be rotated between a locking position and an unlocking position. The pin 5 is covered by a removable cap 6.

[0018] Fig. Figure 2 shows the fully assembled shaft with the shaft cover 2 and the lid 4 inserted into the extension 3. The shaft cover 2 is screwed to the corners of the shaft with two screws 7 each.

[0019] Fig. Figure 3 shows in a perspective view of the manhole cover 2 that an annular inner projection 8 is formed at the edge of the receiving opening of the attachment 3 for the cover 4, on which the cover 4 rests and which is engaged by a radially outwardly projecting locking hook 9, specifically in the locking area of ​​the cover in which it cannot be removed from the manhole cover.

[0020] Fig. Figure 3 also shows that recesses 10 are formed at two diametrically opposite points on the edge of the opening of the attachment 3, which make it possible to lever off the lid in the position turned into its removal position.

[0021] Fig. Figure 4 shows as an associated feature on the lid 4 a recess 11 on the edge of the lid 4, at which the lid 4 can be levered off by means of a tool, for example a pin-shaped tool, when the recess 11 is opposite the recess 10, as is the case in the release position of the lid 4.

[0022] Fig. Figure 5 shows a bottom view of the cover 4, which consists of a plurality of radial ribs 13 beneath the closed top surface 12. The locking hook 9 not only projects radially beyond the circumference of the cover 4, but is also directed obliquely upwards, so that when the cover 4 is in place, its edge 14 rests on the inner annular projection 8, and the projecting locking hook 9 engages under this projection as long as the cover 4 is within the locking area. A locking position 15 is formed within the locking area ( Fig. 6), where the locking hook 9 releasably engages in a wave contour 16 of the annular projection 8, so that the cover 4 cannot be unintentionally rotated into the release position. The releasable engagement of the locking hook 9 on the wave area 16 of the annular projection 8 is shown on an enlarged scale in Fig. 7 shown, in which position the locking hook 9 rests against a stop 17.

[0023] In the unlocked position of the cover 4, a recess is provided in the receiving opening for the cover 4, in which the locking hook 9 is not covered by the inner annular projection 8. In this rotational position of the cover 4, a stop for the locking hook 9 is also formed. In this position, the cover 4 can be locked by engaging the recesses 10 ( Fig. 8) be pried out of the attachment 3 or the shaft cover so that access to the interior of shaft 1 is free.

[0024] Fig. Figure 9 shows an alternative embodiment in which the manhole cover 17 has a continuously flat shape with a plate-shaped top surface 18 into which the lid 4 is inserted and locked and removed in the same way as in the first embodiment. The manhole cover 17 can be formed integrally with the manhole walls by injection molding. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2023 100 475 A1

[0002]

Claims

[1] Shaft system comprising a small shaft (1) into which, for example, fiber optic cables and / or underground cables can be inserted, which can be connected in the shaft (1) to outgoing fiber optic cables and / or underground cables, with a shaft cover (2, 3; 17) that closes the top of the shaft (1). characterized by , that a circular cover (4) is inserted into the manhole cover (2, 3; 17) which covers the access opening to the interior of the manhole (1), and that the cover (4) is rotatable between a locking area in which the cover (4) is locked against removal and a release point in which the cover (4) can be removed from the manhole cover (2, 3; 17). [2] Shaft system according to claim 1, characterized by , that the lid (4) is provided with a central actuating pin (5) with which the lid (4) can be rotated. [3] Shaft system according to claim 1 or 2, characterized by, that the cover (4) is provided on its underside with a locking hook (9) projecting downwards and radially outwards, which engages an annular inner projection (8) of the manhole cover (2, 3; 17) on which the cover (4) rests in the locking area. [4] Shaft system according to claim 3, characterized by , that the annular inner projection (8) of the manhole cover (2, 3; 17) has a bulge at the unlocking point which releases the locking hook (9) for removal of the cover (4). [5] Shaft system according to one of claims 1 to 4, characterized by , that in the locking area a stop (17) is formed on the annular inner projection (8) on which the locking hook (9) releasably engages. [6] Shaft system according to one of claims 1 to 5, characterized by , that a stop for the locking hook (9) is formed at the unlocking point. [7] Shaft system according to one of claims 1 to 6, characterized by , that the cover (4) has a lateral indentation at the unlocking point and the manhole cover (2, 3; 17) has a recess (10) at the adjacent edge, through which the cover (4) can be pried open. [8] Shaft system according to one of claims 1 to 7, characterized by , that the shaft cover (2, 3) has an internally hollow, open-bottomed superstructure (3) on its upper side, into which the lid (4) is inserted and which contains the access opening to the interior of the shaft (1). [9] Shaft system according to claim 8, characterized by , that the attachment (3) is formed in one piece with the manhole cover (2, 3). [10] Shaft system according to claim 7 or 8, characterized by , that the attachment (3) has a cubic or circular cylindrical shape. [11] Shaft system according to any one of claims 1 to 7, characterized by, that the manhole cover (17) has a flat shape with a continuous plate-shaped top (18) into which the lid (4) is inserted and which contains the access opening to the interior of the manhole. [12] Shaft system according to claim 11, characterized by , that the manhole cover (17) is integrally molded onto the manhole. [13] Shaft system according to any one of claims 1 to 11, characterized by , that the manhole cover (17) is screwed onto the manhole.

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