FR2758836A1 - DEVICE FOR LOCKING A PAD WITH JOINT MOUNTING ON A FRAME - Google Patents

Abstract

The present invention relates to a locking device for a buffer with articulated mounting on a frame. This device comprises a lock (5) associated by means of a connecting piece (12) with a buffer (2) mounted articulated on a frame (1), the lock (5) having the form of an angled lever. (6) pivotally mounted on the buffer (2) and one (7) of the arms of which cooperates with a member (38) of the frame (1) to perform the locking, while the other arm (8) forms a handle. operation of the lock (5) and lifting of the buffer (2) in the unlocked position thereof. This device applies in particular to the locking and unlocking of a buffer mounted articulated on a frame embedded in a roadway to provide a manhole giving access to a trench.

Description

The subject of the present invention is essentially a device for

  locking a hinged mount buffer on

a frame.

  It has long been known to close the manholes for example, using a buffer or mounted cover

  articulated on a frame or chassis embedded in the roadway.

  The articulation of the buffer on the frame may or may not allow disassembly or extraction of the buffer frame. It has also been proposed various systems for locking the stamp on the frame, as well as, of course,

unlocking the buffer.

  However, the locking and unlocking systems proposed until now could have a number of disadvantages. Among these are the sometimes unreliable operating reliability, a relatively complicated and expensive mechanical structure of the locking system, a risk of seizing the system over time, and the necessary use of an ancillary tool. lifting or extraction

  Frame stamp when you want to have access to the look.

  Also, the object of the present invention is to remedy these drawbacks by proposing a buffer locking device which is of a particularly simple mechanical design, whose reliability of operation is perfect in all circumstances and even in the long run, and which constitutes in itself an advantageous and practical means of raising the

  buffer with respect to the frame to give access to the gaze.

  For this purpose, the subject of the invention is a device for locking a hinged mounting buffer on a frame and of the type comprising at least one lock associated with the buffer and situated in a position opposite to that of the hinge of the buffer on the frame, characterized in that said latch has the form of a bent lever pivotally mounted on the pad and one of the arms cooperates with a member on the wall of the frame to effect locking, while the other arm form handle handle lock and

  lifting the buffer in the unlocked position thereof.

  According to another feature of this device, the elbow of the aforementioned lever comprises a pivot axis on which is snapped a plastic part itself inserted and retained in a housing in the buffer. It will be further specified here that the aforesaid piece has substantially the shape of a U whose bottom receives the pivot axis and at least one of the branches is retained

  by snapping into the aforementioned housing.

  According to yet another characteristic, the housing formed in the buffer has a wall with recess allowing the movement of one of the arms of the lever and defining two branches which each comprise a notch retaining the plastic part by a beak provided on

one of the branches of this room.

  According to yet another characteristic of the invention, one of the arms of the lever is received, in the buffer locking position, between two lugs integral with the wall of the frame and comprises at its free end lugs

  lateral support under said legs.

  It will be observed here that the aforesaid lugs each form, in the upper part, an inclined ramp cooperating with the aforementioned lugs during the closure of the frame by the buffer. According to yet another characteristic of the device of the invention, the other arm of the lever comprises at its free end a transverse bar forming the handle.

lifting buffer.

  The aforementioned lever is, according to one embodiment

preferred, angled at right angles.

  But other features and benefits of

  the invention will become more apparent in the detailed description

  which follows and refers to the accompanying drawings, given solely by way of example, and in which: - Figure 1 is a schematic plan view and from above of a frame with buffer in the closed position; - Figures 2 and 3 are partial views in section of the articulation of the buffer on the frame, the buffer being in the closed position in Figure 2, and in the open position in Figure 3; FIG. 4 is a perspective view of the lens according to this invention; - Figure 5 is an elevational view and side, along arrow V of Figure 4, the latch; - Figure 6 is a side view of the plastic connecting piece which is snapped on the latch; - Figure 7 is a side view of this connecting piece, but shown in position latched on the latch; FIGS. 8, 9, 10 and 11 illustrate how the insertion and retention of the link-lock assembly shown in FIG. 7 takes place in a housing of the buffer, the latter being partially shown in section. and in the closed position on the frame; - Figures 12, 13 and 14 illustrate the successive positions that takes the locking device of the invention when closing and locking the stamp on the frame; FIG. 15 illustrates, starting from the closed position visible in FIG. 14, the unlocking of the buffer on the

  frame to a position of the lock as it forms

  even a handle of lifting the tampon; and FIG. 16 is a view from above of the locking tabs belonging to the frame, along the arrow XVI of FIG.

Figure 15.

  FIG. 1 shows a frame 1 which, according to the exemplary embodiment shown, has an octagonal shape, and on which is articulated a buffer 2, it being understood that centering tabs 3 are provided to make a good

  guiding and centering buffer 2 in its frame 1.

  FIG. 1 shows at 4 the articulation of the buffer 2 on the frame 1, and at 5 the locking device or latch according to this invention which is diametrically opposed to the hinge 4, and which is in a way housed in a housing 6 forming part of the frame 1. The articulation 4, clearly visible in FIGS. 2 and 3, is of a type known per se and is an articulation of the ball-and-socket type associated with the pad 2 and rotating in a housing

  28 specially arranged in the frame 1.

  As can be seen in FIG. 3, with such an articulation, the buffer 2 can be opened at around 120 and remain connected to the frame 1. That being so, in a position at approximately 90, the buffer 2 can be extracted from the frame 1, if

we want it.

  As can be seen in FIG. 4 in particular, the lock 5 according to this invention has the shape of a bent lever 6 pivotally mounted on the pad 2. This lever 6 is, according to the embodiment shown, angled at right angles and comprises an arm 7 cooperating with a member 38 secured to the frame 1 and clearly visible in FIGS. 8 to 16, to effect the locking of the pad 2 on the frame 1, while the other arm 8 of the bent lever 6 forms, as one will describe in detail later, an operating handle lock 5, and also forms a lifting handle of the

  buffer 2 when it is unlocked.

  As clearly shown in FIG. 4, the elbow of the lever-shaped lock 6 according to this invention comprises a pivot axis 9 constituted by the elbow 10

  itself and two pins or transverse analogues 11.

  On the pivot axis 9, that is to say on the elbow 10 and its two associated lugs 11, is snapped a piece 12 of plastic material, clearly visible in Figures 6 and 7 in particular. This piece 12 has, in side view, the shape of a U whose bottom 13 receives the pivot axis 9, that is to say more precisely the two lugs 11, and one of 14 of the two branches 14, 15 has a portion slightly outwardly shaped in the form of spout 16 and whose role will be

explained later.

  As can be seen in FIGS. 8 to 11, once the part 12 is snapped onto the lock 5, the assembly is inserted and retained in a housing 17 arranged in and under the

buffer 2.

  This housing 17 has, in cross section, substantially the shape of a U lying down and whose upper branch is constituted by the upper face of the buffer 2. The other branch or lower branch of this U comprises a recess 18 which 'extends in the longitudinal direction of this branch and which itself defines two

  branches 19 of which only one is visible in the figures.

  Each of these two branches 19 has, in the vicinity of its

free end, a notch 20.

  Thus, as can be seen successively in FIGS. 8 to 11, when the assembly of the part 12 - lock 5 is introduced into the housing 17 of the buffer 2, the branches 14, 15 of the part 12 will spring elastically in the housing 17 buffer 2 between respectively the branches 19 and the upper face of the buffer 2 defining said housing 17

as explained previously.

  At the end of insertion of the part 12 and the lock 5 associated with this part, as can be seen in FIG. 11, the spout 16 of the branch 14 of the part 12 will catch in the notch 20 of the branch 19 of the housing 17. It will be observed here that the connecting piece 12 in fact comprises two U-shaped parts, only one of which is visible in FIG. 6, these two U-shaped portions being respectively snapped onto the two lugs 11 of the lever 6. Therefore, two nozzles 16 will hang, at the end of insertion of the piece 12 in the housing 17 of the buffer 2, on the notches 20 of the two branches 19 defined by the recess 18 which will allow the movement of the arm 7 of the elbow lever 6 at the end of insertion of the piece 12, as can be understood

  referring to Figures 10 and 11.

  It will again be observed here that each lug 11 of the lever 6 has two opposite flats lla allowing its introduction into the U of the part 12 which, by rotation after

  the introduction of the lugs 11, becomes integral with the lever 6.

  The member 38 belonging to the wall of the frame 1 and allowing the locking of the buffer 2 on this frame, consists of two lugs 21 spaced from one another and defining between them a free space 22 allowing the movement of the arm 7 , as will be described later about the operation. These two tabs 21 are clearly visible in FIG. 16, and, as seen in FIGS. 8 to 15, they define, in the upper part, an inclined ramp 23. Returning to FIG. 4 in particular, it can be seen that the arm 7 the bent lever 6 comprises at its free end a transverse bar 24 defining lateral lugs 25 may bear under the tabs 21, as can be seen in Figure 14. The lateral lugs 25 may also cooperate with the upper part forming ramp

  inclined 23 of the tabs 21 during the closure of the buffer 2.

  FIG. 4 shows again that the other arm 8 of the bent lever 6 also has a transverse bar 26 at its free end, this bar 26 forming a handle allowing not only the operation of the lock 5 but also the lifting of the buffer 2 related to

  frame 1, as will be explained now in detail.

  When it is desired to close the frame 1 by the pad 2, the pad is tilted, in the direction of arrow F, around the hinge 4, as can be seen in Figure 12, so that the lateral lugs 25 at the end of the arm 7 of the lever 6 abut on the inclined ramp 23 that form

both legs 21.

  The tilting of the buffer 2 continues, the lugs of the arm 7 follow the inclined ramp 23 causing the lever 6 to tilt, as can be seen in FIG. 13, and this until the lateral lugs 25 arrive at the end. end of the ramp 23. In the seating position of the buffer 2 on the frame 1, the lugs 25 then escape the tabs 21 and, as seen in Figure 14, simply actuate the arm 8, following the arrow G, to lock the buffer 2 on the frame 1. Indeed, the arm 7 of the lever 5 can be struggling not only in the recess 18 of the housing 17, but also in the space 22 between the two legs 21, the Lateral lugs 25 of the arm 7 will be retained by the lugs 21. To proceed to the opening of the buffer 2, it suffices, as seen in Figure 15, to tilt, in the direction of the arrow H the cranked lever 6 , using the

handle 26.

  Thus, the lateral lugs 25 of the arm 7 will be disengaged from the lugs 21. In the maximum tilting position of the lever 6, the arm 8 will then bear on the buffer 2, and the handle 26, that is to say the latch 5 will - even, will allow the lifting of the buffer 2, and therefore the opening of the gaze

delimited by the frame.

  Of course, the invention is not limited to the embodiment described and illustrated which has been given only to

as an example.

  Thus the connecting piece snapped on the lock may be any suitable plastic material such as polyamide for example. Similarly, appropriate clearances and / or rods or similar plastics may be provided on the cooperating parts of the locking system of the invention, so as to be certain to avoid

  especially any risk of premature wear and / or noise.

  This means that the invention includes all the technical equivalents of the means described as well as their

  combinations if they are carried out according to his spirit.

Claims (8)

  1. A device for locking a buffer (2) hinged to a frame (1) and of the type comprising at least one lock associated with the buffer (2) and located at a position opposite to that of the hinge (4) buffer (2) on the frame (1), characterized in that said latch (5) has the shape of a bent lever (6) pivotally mounted on the pad (2) and one (7) of which arm cooperates with a member (38) on the wall of the frame (1) to perform the locking, while the other arm (8) forms the operating handle lock (5) and   lifting the buffer (2) in the unlocked position of the   this. 2. Device according to claim 1, characterized in that the elbow (10) of said lever (6) comprises a pivot axis (9) on which is snapped a plastic part (12) itself inserted and retained in a   housing (17) formed in the buffer (2).   3. Device according to claim 2, characterized in that the aforementioned part (12) has substantially the shape of a U whose bottom (13) receives the pivot axis (9) and at least one of which (14) ) branches (14, 15) is selected   by snapping into the aforementioned housing (17).   4. Device according to claim 2 or 3, characterized in that the housing (17) formed in the buffer (2) has a wall with a recess (18) for the movement of one (7) of the lever arms ( 6) and defining two branches (19) each comprising a notch (20) retaining the plastic part (12) by a spout (16)   provided on one (14) of the branches (14, 15) of this piece.   5. Device according to claim 1, characterized in that one (7) of the arms (7, 8) of the aforementioned lever (6) is received, in the buffer locking position, between two lugs (21) integral with the frame wall (1) and has at its free end lateral pins (25) bearing under said tabs.   6. Device according to claim 5, characterized in that the aforementioned tabs (21) each form, in the upper part, an inclined ramp (23) coppérant with the aforementioned lugs (25) during the closure of the frame (1) by the buffer (2).   7. Device according to claim 1, characterized in that the other aforementioned arm (8) of the lever (6) has at its free end a transverse bar (26) forming the operating handle.   8. Device according to claim 1, 5, 6, or 7, characterized in that the aforementioned lever (6) is bent at right angles.