SK13698A3 - Locking device for a hinged manhole cover - Google Patents

Abstract

The lock is used for a hinged manhole cover (2) which is located in a surrounding frame (1) set in a road. The lock consists of an angled lever (5) which is pivoted to the cover and has one arm (7) which engages with a projection (38) on the frame, while the other arm (8) forms a handle for release of the lock and lifting of the cover. The angle of the lever has a pivot which receives a clip-on plastic component (12) which is inserted into and retained by a recess in the cover. The plastic component is basically U-shaped, with its inner surface receiving the pivot and one of its branches (14) clipping into the recess (17).

Description

The locking mechanism for securing the articulated hatch (2) to the frame (1) comprises at least one bolt associated with the hatch (2) and located opposite to the hinge (4) in which the hatch (2) is attached to the frame (1), wherein the bolt (5) is in the form of a knuckle (6) rotatably mounted on the hatch (2) and in which one arm (7) interacts with a member (38) on the wall of the frame (1) to effect locking while the other arm (8) it forms a handle for operating the bolt (5) for lifting the hatch (2) in its unlocked position. The point of kink (10) of said lever (6) comprises a pivot axis (9) on which a snap-in plastic part (12) is pressed, which is itself inserted and held in a bearing (17) formed in the cover (2).

LOCKING MECHANISM TO ENSURE HANDLING OF THE FRAME

Technical field

The invention relates to a locking mechanism for securing a hinged cover on a frame.

BACKGROUND OF THE INVENTION

It has long been known that openings, for example on pavements, are closed by means of a hinge articulated to the frame inserted into the pavement. The hinged connection of the lid to the frame may or may not allow removal or removal of the lid from its frame.

Various systems have also been proposed which enable the hatch to be locked on the frame and, of course, unlocking. However, the hitherto proposed locking and unlocking systems have various disadvantages. These include the often poor functional reliability, the relatively complex and costly design of the locking system, the risk of seizure during long-term use of the system, and the need to use an additional tool to lift and open the hatch from the frame when accessing the opening is to be closed.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The present invention provides a locking mechanism for securing a hinged hatch on a frame, comprising at least one bolt associated with the hatch and disposed on the opposite side to the hinge in which the hatch is attached to a frame. a hatch and whose one arm cooperates with a member on the wall of the frame to effect the locking, while the other arm forms a handle to operate the bolt and to lift the hatch in its unlocked position.

878 / B

According to a further feature, the mechanism according to the invention, instead of kinking said lever, comprises a pivot axis on which a plastic part, which is itself inserted and held in a cover formed in the hatch, is pressed onto the clip.

According to another feature of the invention, said part is substantially U-shaped, in the bottom portion of which the pivot axis is received and at least one of the arms being held by pressing on a clip in said housing.

According to yet another feature of the invention, the receptacle formed in the hatch comprises a recess wall allowing pivoting of one of the lever arms and defining two arms provided with each notch holding the plastic part by means of a bead formed on one of the arms of the part.

According to yet another feature of the invention, one of the arms of said lever is inserted in the locking position of the hatch between the supports firmly connected to the frame and is provided at its end with lateral pin-like projections supported below said supports. Advantageously, said abutments each form an inclined surface in the upper part, cooperating with said pin-shaped projections when the frame is closed by a hatch.

According to a preferred embodiment of the invention, the bolt lever is angled into a substantially angular shape.

The invention makes it possible to overcome the above-mentioned drawbacks by proposing a lid locking mechanism which is very simple, has in all circumstances long-term functional reliability and at the same time constitutes a convenient and practical means for lifting the lid relative to the frame to provide access to the lid closed.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in more detail in the following description by way of example with reference to the accompanying drawings, which serve solely as examples, in which:

878 / B Fig. 1 is a schematic top plan view of the frame with the hatch in the closed position, Figs. 2 and 3 partial sectional details of the hinge for hinged the hatch to the frame in the hatch closed position in Fig. 2 and the hatch open position in Fig. 3, FIG. 4 is a perspective view of a bolt of the locking mechanism according to the invention, FIG. 5 is a side view V of the bolt of FIG. 4, FIG. Fig. 6 is a side view b of the plastic fastener to be pushed into the bolt; Fig. 7 is a side view of a bolt with a plastic fastener pressed on a snap; Figs. 8-11 show sectional details showing successively how the bolt and fastener assembly of Fig. 6 is inserted and engaged. 7 to the hinge seating, in sectional detail, in the hatch closing position on the frame, FIG. 12 to 14 show sectional details showing the positions occupied by the locking mechanism according to the invention when closing and locking the hatch on the frame; FIG. 15 is a cross-sectional detail starting from the closed position of FIG. 14 showing the unlocking of the hatch on the frame up to the position of the bolt in which the bolt forms the handle for lifting the hatch; and FIG. 16 is a top plan view of the frame in the direction XVI of FIG. 15, showing the locking supports.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1, a frame 1 is shown which has an octagonal shape in the example shown and is hingedly connected to the cover 2. It is understood that the cover 2 is provided with centering projection means 3 to ensure its good guidance.

878 / B and centering in frame 1. In FIG. 2 shows the hinge 4 and the locking mechanism 5 or bolt according to the invention, mounted on the diametrically opposite side of the hinge 4, mounted in the housing 6 forming part of the frame 1 The hinge 4, well visible in FIGS. a spherical pin 27 associated with the cover 2, which rolls in a housing 28 specially formed in the frame 1. As can be seen in FIG. 3, with such a hinge the cover 2 can be opened by an angle of approximately 120 ° while remaining attached to the frame 1. By rotating around 90 °, the hatch 2 can be pulled out of the frame 1 if desired.

As can be seen in particular in FIG. 4, the latch 5 according to the invention is in the form of a cranked lever 6 mounted on a hatch 2. This lever 6 according to the illustrated embodiment is angled into a substantially angular shape comprising an arm 7 cooperating with the member 38 firmly. 8 to 16 for securing the hatch 2 to the frame 1, while the second arm 8 of the crank lever 6 forms, as will be described in more detail below, the control handle of the bolt 5 as well as the lift handle of the hatch 2 when hatch unlocked.

I

As clearly seen in FIG. 4, according to the invention, the point of the lever 6 in the shape of the lever 6 is provided with a pivot axis 9 formed by the point of the pivot 10 itself and transverse pin-shaped projections 11 on the pivot axis 9, i.e. at the point of the kink 10 and its two associated pin-shaped projections 11, a plastic part 12, which is clearly visible in FIGS. 6 and 7, is printed on the clip. This plastic part 12 is U-shaped when viewed from the side. , t. j. more particularly, the two pin-shaped projections 11, and one of the two arms 14, 15 of which comprises a portion bent outwardly in the form of a beak, the meaning of which will be explained below.

As shown in FIG. 8 to 11, after the part 12 is pressed onto the bolt 5, the assembly is inserted into a receptacle 17 formed on the underside of the lid 2. This receptacle 17 has a cross-sectional shape substantially in the horizontal U-shape, the upper arm of which is formed. The second or lower arm comprises a recess 18 which is arranged in the longitudinal direction of the arm and defines two arms 19, of which only one can be seen in the drawings. Each of these arms 19 includes a notch 20 near the free end.

878ZB

8 to 11, it follows that when the assembly 12 and bolts 5 are inserted into the cover 17 of the cover 2, the arms 14,15 of the cover 12 are resiliently locked in the cover 17 of the cover 2 between the arms 19 and the top surface of the cover 2 bearing 17 as explained above. At the end of the insertion of the part 12 and the bolt 5 associated therewith, as is clearly seen in FIG. 11, the general 16 of the arm 14 of the part 12 is engaged in the notch 20 of the arm 19 of the bearing 17.

It should be noted that the connector 12 actually comprises two U-shaped portions, of which only one is shown in Fig. 6, the two U-shaped portions being pressed on a clip onto the two pin-shaped projections t of the lever 6. Thus, at the end of the part 12 into the housing 17 of the cover 2, the notches 20 on the two arms 19 defined by the recess 18 engage two beaks 16, allowing the arm 7 of the crank lever 6 to pivot at the end of the insertion of the part 12, as shown in FIG. 10 and 11.

It should also be noted here that each pin-shaped projection 11 of the tape 5 comprises two mutually opposed flattenings 11a, allowing it to be inserted into the U-shape of the part 12 which remains connected to the lever 6 after insertion of the pin-shaped projections 11.

The support means 38 belonging to the wall of the frame 1 and allowing the hatch 2 to be secured thereon comprises two spacers 21 spaced apart and defining a gap 22 therebetween, allowing the arm 7 to pivot, as will be explained in more detail below in describing its function. . These two armrests 21 are well visible in FIG. 16, defining an inclined surface 23 at the top as shown in FIGS.

In particular, it is apparent from FIG. 4 that the arm 7 of the crank lever 6 has at its free end a transverse rod-like extension 24 defining lateral pin-like projections 25 capable of being supported under the supports 21, as is clear from FIG. 14. The lateral pin-like projections 25 will also be able to interact with the upper portion constituting the inclined surface 23 of the supports 21 when closing the cover 2. In FIG. 4, it is further apparent that the second arm 8 of the crank lever 6 is also provided at the end with a transverse rod-like extension, the transverse rod-like extension 26 forming a handle permitting not only control of the bolt 5 but also lifting of the hatch 2. .

878 / B

When the frame 1 is to be closed by the hatch 2, the hatch rotates in the direction of the arrow F around the hinge 4, as is clearly seen in FIG. 12, so that the lateral pin-like projections 25 at the end of the arm 7 abut the inclined surface 23 formed by the armrests 21. As the lid 2 continues to lower, the pin-shaped projections 25 follow the inclined surface 23, causing the rotation of the lever 6 as well. 13 until the pin-like projections 25 reach the end of the inclined surface 23. In the position of the hatch 2 on the frame 1, the pin-like projections 25 slide out of the supports 21 and it will suffice to act on the arm 8 in the direction Since the arm 7 of the lever 5 can not only be pivoted in the recess 18 of the bearing 17, but also in the space 22 between the two supports 21, the side pin-like projections 25 of the arms 7 will be retained by the supports 21.

It will be sufficient to open the cover 2, as shown in FIG. 15, rotate the curved lever 6 in the direction of the arrow H by means of the handle formed by the rod-shaped extension 26. The lateral rod-like projections 25 of the arm 7 are released from the supports 21. At the maximum pivoting position of the lever 6, the arm 8 rests on the hatch 2 and the handle, i. the latch 5 itself, allows the hatch to be lifted and hence the opening defined by the frame 1.

Of course, the invention is not limited to the described embodiment, which serves only as an example. Thus, the snap-fit fastener on the bolt will be able to be made of any suitable plastic, such as polyamide. It is thus also possible to provide suitable clearances on the interacting elements of the locking system and / or to provide them with threaded or analogous plastic elements, in particular to eliminate the risk of premature wear and noise. Accordingly, the invention encompasses all technical equivalents of the disclosed compositions, as well as combinations thereof, when embodied in its spirit.

o30878 / B

Claims (5)

A locking mechanism for securing the hinged position of a hatch (2) on a frame (1), comprising at least one bolt associated with the hatch (2) and mounted on a side opposite to the hinge (4) in which the hatch (2) is attached to the frame ( 1), wherein the bolt (5) is in the form of a knuckle (6) rotatably mounted on the hatch (2) and whose arm (7) interacts with a member (38) on the wall of the frame (1) to effect locking while the second arm ( 8) forms a handle for operating the bolt (5) and for lifting the hatch (2) in its unlocked position, characterized in that the point of bending (10) of said lever (6) comprises a pivot axis (9) on which it is pressed onto the clip a plastic part (12) which is itself inserted and held in a housing (17) formed in the cover (2). Locking mechanism according to claim 1, characterized in that the aforementioned part (12) has a substantially U-shaped shape, into whose bottom part (13) the pivoting axis (9) is arranged and at least one (14) of the arms (14). 14, 15) is held by pressing on the clip in said housing (17). Locking mechanism according to claim 1 or 2, characterized in that the bearing (17) formed in the hatch (2) comprises a wall with a recess (18) allowing pivoting one (7) of the lever arms (6,7) and defining two arms (19) provided with each notch (20) holding the plastic part (12) by means of a bead (16) formed on one (14) of the arms (14,15) of the part. Locking mechanism according to one of Claims 1 to 3, characterized in that one (7) of the arms (7,8) of said lever (6) is inserted in the locking position of the hatch between the supports (21) firmly connected to the frame (1). ) and is provided at its end with lateral pin-like projections (25) resting below said supports (21). 30,878 / B Locking mechanism according to claim 4, characterized in that said supports (21) each form an inclined surface (23) in the upper part, cooperating with said pin-shaped projections (25) when closing the frame (1) with the hatch (2). 30 878 / B «2. \ 5 ^ .Ρ_ Figure 3 Fig.1 Fig.2 .14 .16 Fig. 10 Fig.12 ⁴ / s Fig. 13 Figure 16 Fig. 14 Obr.15 vzzzs,