EP2209949A1

EP2209949A1 - Device for locking a cover on a frame on a shaft, tunnel or the like

Info

Publication number: EP2209949A1
Application number: EP08842473A
Authority: EP
Inventors: Wilfried Neuber; Dieter Jagdmann
Original assignee: Hydrotec Technologies AG
Current assignee: Hydrotec Technologies AG
Priority date: 2007-10-19
Filing date: 2008-10-20
Publication date: 2010-07-28
Also published as: DE202007014720U1; HK1145526A1; CN101903598A; WO2009053010A1; CN101903598B

Abstract

The invention relates to a device for locking a cover (4) on a frame (2), which defines an opening of a shaft, tunnel or the like, with a latch (8) which is arranged on the cover (4) and can be moved between a closed position, in which it is in engagement with a portion (2a) of the frame (2), and an open position in which it is not in engagement with the frame (2), and with an operating element (10) which is designed to move the latch (8) between its closed position and its open position. The distinguishing feature of the invention is that the operating element (10) can be shifted between an operating position, in which it can be brought into engagement with the latch (8) or is in engagement with the latch (8), and an inoperative position in which it is not in engagement with the latch (8).

Description

Device for locking a lid to a frame on a shaft, tunnel or the like.

The invention relates to a device for locking a lid to a frame which defines an opening of a shaft, tunnel o. The like., With a latch disposed on the cover and between a closed position in which it engages with a portion of the frame and an opening position in which it is out of engagement with the frame is movable, and with a control element which is adapted to move the latch between its closed position and its open position. Furthermore, the invention relates to a lid with such a device and an arrangement of a frame and such a lid.

Such locking devices are used to lock a lid to a frame that limits an opening of a shaft, tunnel o. The like., And are in various forms in use. In particular, such locking devices are used to lock a lid of a manhole in a manhole or tunnel, the lid of such manhole usually being opened only for installation or maintenance purposes.

CONFIRM! £ GUNGSKOPl net becomes. Under "opening" in this context, both the opening of a shaft, tunnel o. The like. Even as well as a laterally into a shaft, tunnel o. The like. Leading opening, ie in a side wall of a shaft, tunnel o. The like. Formed The frame can both be provided as an independent component, which is attached to the shaft, tunnel or the like, as well as integrally connected to the shaft, tunnel or the like.

The invention now proposes, in a device of the type mentioned, the control element in such a way that it is between a working position in which it is engageable with the bolt or is in engagement with the bolt, and a rest position in which it is out of engagement with the bolt, can be brought.

In particular, the invention allows a particularly simple handling of the operating element. It is advantageous that the fact that the control element is in the idle state in the rest position, the latch does not open unintentionally. To open the bolt, the control element according to the invention must be moved to a working position; because this is the only way to bring the control element into engagement with the bolt. Finally, the invention provides the further advantage that the control element remains on the cover and can not be lost and is therefore always available for the operation of the bolt.

Preferably, means should be provided for bringing the operating element into its rest position, which may have, for example, at least one spring. Such measures have the advantage that the control element automatically comes to its rest position when it is released or not operated, and then remains in the rest position. In this case, it is possible only against the influence or the effect of those means to spend the operating element in the working position.

Alternatively or additionally, the operating element may be designed such that it passes through the influence of gravity in the rest position. If the operating element is released in this embodiment, it will be affected by the influence of gravity automatically to its rest position and remains there due to the influence of gravity. The movement of the bolt into the working position is done against the influence of gravity.

Appropriately, the working position of the operating element should be above its rest position.

In order to allow the operating element to be particularly effectively transferred to the rest position by the influence of gravity, the operating element should preferably have a weight which brings about the movement of the operating element into the rest position.

Appropriately, the operating element should have an engagement means which brings the operating element in its working position in engagement with the bolt and is in the rest position of the operating element out of engagement with the bolt.

In a particularly preferred common development of the two last-mentioned embodiments, the engagement means is formed by the weight. Thus, in this development, a body is provided, which is the weight and at the same time the engagement means, so that in this preferred case, two functions are combined in one and the same body, namely on the one hand, the engagement function to the operating element in the Working position to bring into engagement with the bolt, and the function as a weight, which supports the movement of the operating element in the rest position.

In a further development of the latter embodiment, the latch has a recess for substantially positive and / or non-positive engagement of the engagement means in the manner of a coupling, which realize in a simple, but particularly effective manner engaging the control element in its working position with the bolt leaves. Preferably, the cross section of the recess should correspond approximately to the cross section of the engagement means, wherein the cross section of the engagement means may correspond for example to a triangle, quadrangle or polygon. Furthermore, the contour of the recess may correspond approximately to the contour of the engagement means. For a particularly effective intervention Preferably, the engagement means is provided at its periphery with a plurality of teeth. Furthermore, the engagement means may preferably have the shape of a cone or truncated cone tapering in the direction of the recess and the recess in the bolt a corresponding shape of a cone or truncated cone widening in the direction of the engagement means.

A further preferred embodiment of the invention is characterized in that the operating element has a rod-shaped portion, with which it is movably mounted on the cover in the longitudinal direction of the rod-shaped portion. Thus, the rod-shaped portion of the operating element is movable in the longitudinal direction between the working position, in which the operating element comes into engagement with the latch, and the rest position, in which it is disengaged from the bolt.

In a further development of this embodiment, the rod-shaped portion of the operating element is guided by the lid.

Preferably, the rod-shaped portion of the operating element on a located outside the outside of the lid located on the first end on which a handle is arranged. The handle not only facilitates the handling of the control element, but can also act as a weight to support the movement of the control element in its rest position. In a further development may be formed in the outer or top of the lid, a recess into which the handle in the rest position of the control element can be arranged. This has the advantage that the handle in the rest position of the control element, so to speak, 'disappears' and thus does not bother and is not exposed to the risk of unintentional operation.

In the embodiment, according to which the operating element can be brought into the rest position by the influence of gravity, the rod-shaped section of the operating element should expediently be directed with respect to the horizontal and preferably approximately vertically. In a further development, the rod-shaped portion of the operating element has a lower end, on which the aforementioned engagement means is arranged. A further advantageous embodiment of the aforementioned embodiment is characterized in that the rod-shaped portion of the operating element extends substantially through an opening in the lid, so that a first end of the rod-shaped portion of the operating element always on the outside of the lid and a second end the rod-shaped portion of the operating element is always located on the inside of the lid. This development results in a particularly space-saving and at the same time effective construction.

Appropriately, the latch should be rotatably mounted on the lid. In this case, preferably, the bolt should have an opening through which extends the rod-shaped portion of the control element. This breakthrough may preferably form a bore whose central axis coincides approximately with the axis of rotation of the bolt.

Preferably, the latch should be located on the inside or underside of the lid, where it usually interferes least. In order to be able to open the lid from inside, even when closed, the latch should have a handle.

Hereinafter, a preferred embodiment of the invention will be explained in more detail with reference to the accompanying drawings. Show it:

Figure 1 in cross section a locking device on a frame and a lid of a dewatering device according to a preferred embodiment of the invention in a partially exploded view;

Figure 2 shows the locking device of Figure 1 in the assembled state with the operating element in its rest position;

Figure 3 is a perspective view of a portion of a dewatering device obliquely from above on top of the lid with lying in a recess formed in the top of the lid handle of the control element located in its rest position; and Figure 4 is a perspective view of a portion of a dewatering device obliquely from below on the underside of the lid with the operating element in its rest position.

The exemplary embodiment of a locking device described below is provided for locking a cover to a frame which delimits an opening of a shaft, tunnel or the like.

In the accompanying figures, a section 2 and a cover 4 which can be placed on or rest on it each show a section on which a locking device 6 according to a preferred exemplary embodiment is provided, which has a latch 8 and an operating element 10. Preferably, the frame 2 and the lid 4 are made of cast material, such as cast iron. The frame 2 defines an opening which optionally form the opening of a shaft, tunnel o. The like. Or laterally in a shaft, tunnel o. The like. Can lead. Furthermore, the frame can optionally be provided as a one-piece with a shaft, tunnel o. The like. Connected or separated from this to be produced and at a shaft, tunnel o. The like. To be mounted component.

As can be seen in particular Figure 1, the bolt 8 is arranged on the underside of the lid 4. For this purpose, the latch 8 has an upper portion 8a, which is provided with a cylindrical outer surface and is rotatably mounted in a lid formed in the bore 12 12 about an axis of rotation 14 which in the illustrated embodiment approximately at right angles to the longitudinal extent of the lid 4 and in the illustration runs approximately vertically from Figure 1. So that the latch 8 does not fall off from the underside of the cover 4, the cylindrical portion 8a of the bolt 8 is secured with a securing ring 16 which can be locked in a groove 18 running around the cylindrical outer surface of the portion 8a. In Figure 1, the locking ring 16 is shown separately from the bolt 8, while according to Figure 2, the locking ring 16 is seated in the circumferential groove 18. Thus, the cylindrical portion 8a, together with the bore 12 formed in the cover 4, whose diameter corresponds approximately to the outer diameter of the cylindrical portion 8a of the bolt 8, forms a rotatable bearing the bolt 8 about the axis of rotation 14 on the underside of the lid 4, wherein the latch 8 between a closed position in which it is in engagement with the frame 2 and the lid 4 is locked to the frame 2, and an open position in which he himself is out of engagement with the frame 2, can be rotated. For locking on the frame 2, the bolt 8 has a radially extending extension 8b with respect to the axis of rotation 14, which engages in the closed position formed on the underside of the frame 2 surface portion 2a. In Figures 1 and 4, the bolt 8 is shown in its closed position. As can also be seen from FIG. 4, adjacent to the surface section 2a (FIG. 1) a projection 2b is formed on the frame 2, which serves as a stop for the extension 8b of the bolt 8 and thus correspondingly limits the rotational movement of the bolt 8 in its closed position ,

As can also be seen in particular from FIG. 1, in the exemplary embodiment illustrated, the bolt 8 furthermore has a handle 8c, which is likewise arranged radially with respect to the axis of rotation 14 and lies opposite the extension 8b.

Between the extension 8b and the handle 8c, the bolt 8 has a further portion 8d, which in the illustrated embodiment has the shape of an upwardly tapering truncated cone whose central axis coincides with the axis of rotation 14, and lies below the cylindrical portion 8a.

In the region of the sections 8a and 8d, the bolt 8 is further provided with a through-hole 20, whose central axis coincides with the axis of rotation 14, whereby the through-hole 20 in the arrangement of Figure 1 is approximately vertically aligned. At the lower end, the through hole 20 opens into a recess which has the shape of a downwardly widening truncated cone whose central axis also coincides with the axis of rotation 14. On the inside of the conical recess 22 in the circumferential direction adjacent and extending in the axial direction ribs or teeth are formed det. As already mentioned above, in addition to the latch 8, the locking device 6 also includes an operating element 10. As can be seen in particular from FIGS. 1 and 2, the operating element 10 has a rod-shaped section 30, at the upper end of which a handle 32 is approximately at right angles is arranged so that the operating element 10 has a substantially T-shape.

In the illustrated embodiment, the rod-shaped portion 30 has a square cross section and is thus formed as a square, while its free lower end 30a is provided with an external thread. As particularly shown in FIG. 2, the rod-shaped section 30 extends through the through-hole 20 of the bolt 8, so that its free lower end 30 a emerges from the through-hole 20 in the direction of the underside of the bolt 8. In the assembled state, a nut 34 is attached to the rod-shaped portion 30 of the operating element 10, as can be seen in particular Figure 2. For this purpose, the nut 34 is provided with a passage opening 36, which has an inner cross section corresponding to the rectangular outer cross section of the rod-shaped portion 30 of the operating element 10 and thus in the illustrated embodiment has a square inner cross-section. Further, as can be seen in particular Figures 1 and 2, the outer contour 34 corresponds approximately to the inner contour of the recess 8 formed in the bolt 8, so that the nut 34 has a corresponding truncated cone shape, along the circumference along side axially directed ribs or teeth 38 are formed , In order to secure the nut 34 on the rod-shaped portion 30 of the operating element 10, a stop nut 40 is screwed onto the externally threaded free lower end 30a of the rod-shaped portion 30, as shown in FIGS. 2 and 4 in conjunction with FIG.

The rod-shaped portion 30 of the operating element 10 is loosely inserted through the through hole 20 in the bolt 8. Thereby, the rod-shaped portion 10 in the through-hole 20 along the rotation axis 14 is movable, so that the operating element in the orientation according to the figures 1 and 2 can be moved between an upper and a lower position. In addition, the inner diameter of the through hole 20 is at least slightly larger As a result, the operating element 10 can be rotated relative to the bolt 8 about the axis of rotation 14, provided that the nut 34 is disengaged from the recess 22 of the bolt 8.

Due to the shape similarity or evenness between the inner contour of the recess 22 of the bolt 8 and the outer contour of the nut 34, the nut 34 can be positively and non-positively received in the recess 22, whereby a rotationally fixed engagement between the nut 34 and the recess 22 and thus is formed between the control element 10 and the latch 8. However, this non-rotatable frictional connection between operating element 10 and latch 8 arises only when the operating element 10 is moved to its uppermost position, which is the working position of the operating element 10. This is done by means of the handle 32, the operating element 10 is pulled away from the lid 4, which means in the orientation according to Figures 1 and 2 that the operating element 10 is pulled up with its handle 32 from the cover 4. Thereby, the rod-shaped portion 30 is moved from the position shown in Figure 2 through the through hole 20 in the bolt 8 in the direction of the outer or upper side 4a of the lid 4 until the nut 34 engages positively and non-positively in the recess 22. If the operating element 10 is then rotated about the axis of rotation 14, this rotational movement is transmitted to the bolt 8, with the result that the bolt 8 is rotated between its closed position shown in FIG. 1 and an open position. Since the nut 34 secured with the aid of the stop nut 40 at the lower end 30a of the elongated portion 30 forms a stop for the operating element 10 on the bolt 8 and thus prevents the bolt 10 from being pulled completely out of the cover 4, the handle 32 can be moved of the control element 10 also for opening or loosening the cover 4 from the frame 2 use.

On the other hand, if the operating element 10 is released in its upper position or working position, then the operating element 10 falls into its lower position, which is the rest position in which the operating element 10 is shown in FIGS. 2 to 4. The movement of the control element from the upper arm beitsstellung in the lower rest position is thus effected solely by the influence of gravity. This has the consequence that the nut 34 releases from the recess 22 in the bolt, whereby the operating element 10 is disengaged from the bolt 8. The nut 34 serves not only as an engaging means for producing a rotationally fixed engagement between the operating element 10 and the bolt 8 in the working position of the operating element 10, but also as a weight, which supports the movement of the operating element 10 in the rest position according to Figures 2 to 4 ; In that regard, the nut 34 has a dual function in the illustrated embodiment. Of course, the weight of the remaining operating element 10, in particular its rod-shaped section 30, also plays an additional role in assisting in the movement of the operating element 10 into the rest position.

Thus, in the rest position of the control element 10 whose handle 32 does not interfere with the top or outside 4a of the lid 4 protrudes, an elongated recess 42 is formed in the top or outside 4a of the lid 4, which the handle 32 of the rest position located control element 10 receives, as can be seen in particular Figures 2 and 3. In this case, the recess 42 is formed such that the handle 32 does not protrude from the plane formed by the top or outside 4a of the lid 4, as can also be seen from FIGS. 2 and 3. Incidentally, Figures 1 and 2 also show that the bolt 8 is rotatably mounted with its upper cylindrical portion 8a in the bottom of the recess 42 of the lid 4.

As can also be seen in FIGS. 2 and 4, in the rest position of the operating element 10, the nut 34 is spaced from the bolt 8, which ensures that an undesired engagement between the nut 34 and thus the operating element 10 on the one hand and the bolt 8 on the other hand is excluded.

The operation of the bolt 8 is possible with the help of the control element 10 only from above or from the top or outside 4a of the lid 4. If, on the other hand, it is necessary to open the locked lid 4 from its underside, this can not be accomplished by the operating element 10. For this purpose, however, the handle 8c is provided on the bolt 8, by means of which the bolt 8 can be pivoted from its closed position into its open position.

While in the embodiment described above with reference to the figures, the operating element 10 is designed such that it passes through the influence of gravity in its rest position, alternatively or additionally, other measures are conceivable to spend the control element 10 in its rest position. For example, this can be a spring, preferably a tension spring, can be used, which could be completely dispensed with the gravitational influence, if necessary. The latter would have the advantage of aligning the arrangement of frame 2 and cover 4, for example, approximately vertically, which would then lead to a substantially horizontal movement of the operating element 10 between its working position and its rest position.

Claims

claims

1. A device for locking a lid (4) on a frame (2) defining an opening of a shaft, tunnel o. The like., With a latch (8) disposed on the lid (4) and between a closed position, in which is in engagement with a portion (2a) of the frame (2) and an open position in which it is out of engagement with the frame (2), and with an operating element (10) which is formed to move the latch (8) between its closed position and its open position, characterized in that the operating element (10) can be brought between a working position in which it is engageable with the latch (8) or in engagement with the latch Latch (8) is located, and a rest position in which it is disengaged from the bolt (8), can be brought.

2. Apparatus according to claim 1, characterized by means for bringing the operating element (10) from its working position to its rest position.

3. A device according to claim 2, characterized in that the means comprise at least one spring.

4. The device according to at least one of claims 1 to 3, characterized in that the operating element (10) designed such that it passes through the influence of gravity in the rest position.

5. Apparatus according to claim 4, characterized in that the working position of the operating element (10) is above its rest position.

6. Apparatus according to claim 4 or 5, characterized in that the operating element has a weight (34) which supports the movement of the operating element (10) in the rest position.

7. The device according to at least one of claims 4 to 6, characterized in that the operating element (10) has an engagement means (34) which brings the operating element (10) in its working position in engagement with the bolt (8) and in the Rest position of the operating element (10) is disengaged from the bolt (8).

8. Device according to claims 6 and 7, characterized in that the engagement means (34) is formed by the weight.

9. Apparatus according to claim 7 or 8, characterized in that the bolt (8) has a recess (22) for substantially positive and / or non-positive reception of the engagement means (34).

10. The device according to claim 9, characterized in that the cross section of the recess (22) corresponds approximately to the cross section of the engagement means (34).

11. The device according to claim 10, characterized in that the cross section of the engaging means corresponds to a triangle, square or polygon.

12. The device according to at least one of claims 9 to 11, characterized in that the contour of the recess (22) corresponds approximately to the contour of the engagement means (34).

13. The device according to at least one of claims 9 to 12, characterized in that the engagement means (34) is provided at its periphery with a plurality of teeth.

14. The device according to at least one of claims 9 to 13, characterized in that the engagement means (34) takes the form of a in the direction of the recess (22) tapered cone or truncated cone and the recess (22) has a corresponding shape of a cone or truncated cone widening in the direction of the engagement means (34).

15. Device according to at least one of the preceding claims, characterized in that the operating element (10) has a rod-shaped section (30) with which it is movably mounted on the cover (4) in the longitudinal direction of the rod-shaped portion (30).

16. The apparatus according to claim 15, characterized in that the rod-shaped portion (30) of the operating element (10) through the lid (4) is guided.

17. The apparatus of claim 15 or 16, characterized in that the rod-shaped portion (30) of the operating element (10) has a outside of the outside (4a) of the lid (4) located first end on which a handle (32) is arranged ,

18. The apparatus according to claim 17, characterized in that in the outer side (4a) of the lid (4) has a recess (42) is formed, in which the handle (32) in the rest position of the operating element (10) can be arranged.

19. The device according to at least one of claims 4 to 14 and further according to at least one of claims 15 to 18, characterized in that the rod-shaped portion (30) of the operating element (10) is angled relative to the horizontal, preferably approximately vertically, is directed.

20. Device according to claims 8 and 19, characterized in that the rod-shaped portion (30) of the control element has a lower end (30a) on which the engagement means (34) is arranged.

21. The device according to at least one of claims 15 to 20, characterized in that extending the rod-shaped portion (30) of the operating element (10) substantially through an opening (42) in the lid (4), so that a first end of the rod-shaped portion (30) of the operating element (10) always on the outer side (4a) of the lid (4) and a second end (30a) of the rod-shaped portion (30) of the operating element (10) is always located on the inside of the lid (4) ,

22. Device according to at least one of the preceding claims, characterized in that the bolt (8) on the lid (4) is rotatably mounted.

23. Device according to claims 21 and 22, characterized in that the bolt (8) has an opening (20) through which extends the rod-shaped portion (30) of the operating element (10).

24. The device according to claim 23, characterized in that the opening (20) forms a bore whose central axis (14) coincides approximately with the axis of rotation of the bolt (8).

25. The device according to at least one of the preceding claims, characterized in that the latch (8) on the inside of the lid (4) is arranged.

26. The device according to claim 25, characterized in that the bolt (8) has a handle (8c).

27. Cover with a device (6) according to at least one of the preceding claims.

28. Arrangement of a frame (2) and a lid (4) according to claim 27.