Information
-
Patent Grant
-
6676332
-
Patent Number
6,676,332
-
Date Filed
Monday, March 11, 200222 years ago
-
Date Issued
Tuesday, January 13, 200421 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Pezzuto; Robert E.
- Pechhold; Alexandra K.
Agents
-
CPC
-
US Classifications
Field of Search
US
- 404 25
- 404 62
- 052 19
- 052 20
- 052 21
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International Classifications
-
Abstract
This highway device includes a frame and an element (14) for covering the frame, the frame (12) including a peripheral border with two walls delimiting a groove and the covering element being equipped with a projecting peripheral lip (32) engaging in the groove in the frame-covering position. The covering element (14) includes at least one ramp (44) extending between the lip (32) and the internal surface of the element, the ramp or ramps being intended to bear on the end edge of the peripheral border of the frame and thus guiding the covering element during the displacement of the latter with respect to the frame, under the action of a force exerted on the element in a zone opposite the ramp or ramps (44).
Description
BACKGROUND OF THE INVENTION
The present invention relates to a highway device, and also to a covering element for such a device.
It concerns in particular a device for closing inspection shafts of an underground network, such as roadway or footway manholes, or a device for capping drains, such as a highway grate.
Highway devices of this type are generally equipped with a frame and an element for covering the frame.
The invention concerns in particular a device of this type, in which the frame comprises an upstanding peripheral border with two walls delimiting a groove and in which the covering element, for its part, is equipped with a projecting peripheral lip.
In the closed position, the covering element caps the frame so that the lip engages in the groove.
In general, in order to remove the covering element, often produced in cast iron, it is necessary to lift it vertically so as to disengage the lip from the groove, this presenting a major disadvantage in view of its mass.
The document FR-A-2 531 152 proposes solving this problem by providing the bottom of the groove with an inclined ramp allowing translation of the covering element during its removal from or mounting on the frame. However, such a solution does not allow, with less effort, the opening and/or closure of the covering element by rotation about the frame.
Another solution consists in equipping the bottom of the groove with a guide allowing rotational guidance of the covering element about a horizontal axis, but this solution does not then allow translation of the covering element during its removal.
These technical solutions thus do not allow displacement of the covering element either rotationally or translationally.
SUMMARY OF THE INVENTION
In the light of the foregoing, the object of the invention is to provide a highway device, the covering element of which can be manipulated easily, either translationally or rotationally, as desired.
The subject of the invention is therefore a highway device of the above-mentioned type, characterized in that the covering element comprises at least one ramp extending between the lip and the internal surface of the said element, the ramp or ramps being intended to bear on the end edge of the peripheral border of the frame and thus constituting a means for guiding the covering element during the displacement of the latter with respect to the frame, under the action of a force exerted on the said element in a zone opposite the ramp or ramps.
In various embodiments, the highway device according to the invention comprises one or more of the following features, considered in isolation or in any technically possible combination.
the ramp or ramps have a sagittal section in the shape of a sector of a disc;
the free end edge of the lip comprises a chamfer constituting a stop for limiting the rotation of the covering element in the direction of opening, in conjunction with the free end zone of the external wall of the frame, on which the external surface of the covering element butts;
the covering element is equipped with grasping means situated opposite the ramp or ramps;
the grasping means consist of a cutout formed in the external surface of the covering element;
the grasping means consist of a through-orifice formed in the wall of the covering element in a zone situated between the border of the latter and the lip;
the lip forms, in the said zone, an offset;
it comprises a lock for locking the covering element in the closed position, on the frame;
the lock comprises a pivoting rod secured to a locking bar by means of two end limbs capable of being folded back, the said bar being intended to be inserted beneath a stop of the frame;
it comprises a seal interposed between the lock and the covering element;
the groove is filled with water and forms, in conjunction with the lip of the covering element, an odour trap;
the frame comprises, at its base, at least one laterally projecting relief, the lower face of which is provided with a series of ribs for anchoring the device in an embedding material; and
the frame comprises anchoring ribs made in the median part of each of its sides, the said ribs being adapted to oppose the bending of the frame.
The subject of the invention is also a covering element for closing an inspection shaft or capping a drainage shaft, comprising a projecting peripheral lip intended to engage in a groove of a support frame, the said groove being delimited by a peripheral border of the frame with two walls, characterized in that the covering element comprises at least one ramp extending between the lip and the internal surface of the covering element and being intended to bear on the end edge of the peripheral border of the frame in order thus to constitute a means for guiding the covering element during the displacement of the latter with respect to the frame under the action of a force exerted on the said element in a zone opposite the ramp.
BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages will become apparent from the description which follows, given purely by way of example and with reference to the accompanying drawings, in which:
FIG. 1
is a top view of the covering element of a highway device according to the invention;
FIG. 2
is a top view of the frame of the device according to the invention;
FIG. 3
is a sectional view along the line III—III of the covering element of the device of
FIG. 1
;
FIG. 4
is a sectional view along the line IV—IV of the frame of
FIG. 2
;
FIG. 5
is an enlarged view of a detail of the covering element of the device illustrated in
FIG. 1
;
FIGS. 6
to
10
show schematically the operation for mounting the covering element on the frame; and
FIG. 11
is a view illustrating the rotational displacement of the covering element with respect to the frame from the closed position to the open position of the device.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS
FIGS. 1 and 2
show a top view of the constituent elements of a highway device, denoted by the general reference numeral
10
.
It is produced in particular in cast iron and has a rectangular or square section in cross-section.
In the exemplary embodiment shown, it is intended for closing an inspection shaft of an underground network.
The device
10
comprises a frame
12
forming a base, which is intended to be mounted on the shaft for access to the underground network, and a covering element
14
consisting of a cover, which caps the frame.
The frame
12
comprises, in each corner, a relief
16
,
18
,
20
and
22
projecting laterally from the wall constituting the frame
12
in order to improve the vertical anchorage of the frame in an embedding material, in this instance mortar, and in order to avoid rotation of the frame about a vertical axis when it is subjected to a rotational force. A series of ribs, such as
23
, extend diagonally on the lower face of each relief in order to improve the horizontal anchorage of the device in the embedding material.
Additional anchoring ribs such as
25
are provided beneath the frame in the median zones in order to prevent the frame
12
from bending in the event of deficient embedding.
The frame
12
comprises an upstanding peripheral border with two substantially vertical walls
24
,
26
delimiting between them a generally U-shaped groove
28
. The height of the inner wall
24
is lower than that of the outer wall
26
.
The cover
14
, for its part, mainly consists of a flat plate
30
, solid or apertured, which is equipped with a peripheral lip
32
projecting from the internal or lower surface of the plate
30
. The cover comprises a first set of bearing blocks
34
,
36
configured in the form of a plane bearing surface coplanar with the plate
30
, and also a second set of bearing blocks
38
,
40
situated opposite the first set and configured in the form of a bearing surface extending in an inclined manner with respect to the plane of the plate
30
downwards and in the direction of the plane bearing surfaces
34
and
36
opposite.
In the assembled state, that is to say when the cover
14
is resting on the frame
12
, the peripheral lip
32
engages in the groove
28
and rests by the bearing blocks
34
,
36
on the bottom of the groove, whereas the bearing blocks
38
and
40
of the second set rest on bearing blocks
41
and
41
a of complementary shape made in the bottom of the groove.
The frame
12
is additionally provided with a stop
42
carried by the internal surface of the internal wall
24
of the peripheral border. This stop preferably has a cross-section in the shape of a V open towards the inside of the frame and receives a projection
43
of complementary shape carried by the internal surface of the cover
14
. The cooperation of this projection
43
and the stop
42
, associated with the particular nature in which the cover bears on the frame
12
, guarantees the cover
14
four-point bearing stability when it is subjected to the action of a vertical load, and does so whatever the point of application of the load on the cover. Any wobbling phenomenon of the cover is thus prevented, thereby avoiding the banging noises.
The bottom of the groove
28
is filled with water so as to form an odour trap, in conjunction with the lip engaged in the groove, as shown in FIG.
5
.
Referring in particular to
FIG. 3
, it can be seen that, according to the invention, the cover
14
is equipped with ramps, such as
44
, having a sagittal section in the shape of a sector of a disc and extending between the internal surface of the lip
32
and the peripheral zone of the internal surface
30
of the cover.
These ramps are positioned on a single side of the cover
14
and constitute a means for guiding the cover
14
, translationally and rotationally, during the displacement of the latter with respect to the frame under the action of a force exerted in a zone opposite the ramps
44
. They are provided in sufficient number to allow effective guidance of the cover, while limiting friction. For example, the cover
14
is equipped with two ramps
44
. The ramps
44
are arranged on the side of the cover where the plane bearing blocks
34
and
36
are situated.
During the mounting of the cover or the demounting thereof, the ramps
44
bear on the end edge of the internal wall
24
of the peripheral border of the frame, allowing the cover either to slide on the frame, during a translational movement, or to pivot about an axis of rotation coplanar with the frame, during a rotational movement.
Furthermore, the lower end of the lip
32
of the cover
14
is provided with a chamfer
45
extending along the side of the lip carrying the ramps
44
. This chamfer is intended to avoid total overturning of the cover in the direction of opening by providing for stabilization of the cover in the open position in which it forms an opening angle greater than approximately 100° with respect to the general plane of the frame.
With the aim of facilitating the grasping of the cover
14
, the latter is equipped with a grasping means
48
provided in the vicinity of the side of the cover situated opposite the ramps
44
.
For example, it is produced in the course of casting of the cover
14
in the form of a through-orifice
48
which may be obtained by direct demoulding. The costly use of a core is thus unnecessary. In this case, as shown in
FIG. 1
, the peripheral lip
32
and the groove
28
advantageously exhibit an offset in this zone so that the orifice is placed outside the lip, so as to ensure the tightness to odours, in the event of use in a footway manhole.
The grasping means
48
may also be produced in the form of a blind hole, for example by coring, made in the external surface of the cover.
Finally, the cover is completed by a locking member
50
, which can be seen in
FIG. 5
, situated opposite the ramps
44
, allowing the cover
14
to be locked on the frame
12
.
It can be seen in this figure that, for example, the lock
50
comprises a locking bar
52
secured to a pivoting rod
54
passing through the cover
14
by folding back two end limbs
55
and
55
a
of this rod against the lower face of the bar.
The pivoting rod
54
is equipped with a head
56
shaped so as to be able to be displaced angularly by means of a tool.
Preferably, the head
56
is capped by a protective plug
58
.
A toroidal seal
60
may be interposed between the head
56
and the cover
14
so as to ensure tightness to odours and to constitute a brake avoiding accidental unlocking of the lock.
In the locked position, the bar
52
engages beneath a stop
59
of the frame integral with the inner wall
24
of the latter.
With reference to
FIGS. 6
to
10
, the operation for mounting the cover
14
on the frame
12
will be described.
This operation is performed, from the position shown in
FIG. 6
, in which the cover rests by the side comprising the ramps
44
on the frame
12
, by exerting a thrust on the cover tending to cause a translation of the latter with respect to the frame until the lip reaches the groove (FIG.
7
).
A subsequent thrust causes the engagement of the peripheral lip in the groove (FIGS.
8
and
9
).
In this position, the projection
43
carried by the cover bears against the stop
42
.
It can be seen in
FIGS. 8 and 9
that, in the course of the engagement of the lip in the groove, the ramps
44
provide for the bearing and sliding of the cover on the free end edge of the internal wall
24
of the groove, thus allowing translation of the cover with less effort.
At the conclusion of this displacement, the peripheral lip is completely engaged in the groove.
In order to remove the cover, the reverse operations have to be performed.
Thus, it is necessary to exert a traction on the grasping means
48
, that is to say a force exerted upwards, so as to disengage the lip from the groove in the zone opposite the ramps
44
, in this case again using the bearing of the ramps
44
on the free end edge of the internal wall of the groove in order to translate the cover.
In order to open the cover, as shown in
FIG. 11
, it is necessary to exert a traction on the cover
14
so as to cause a rotational movement of the cover in the direction of the arrow F about a horizontal axis of rotation extending in the groove.
It will be noted that in the course of this displacement, the ramps likewise bear against the end edge of the inner wall
24
of the groove, allowing rotational guidance of the cover.
It will be noted furthermore that the ramps
44
likewise provide for guidance of the cover during its rotation in the direction of closure, and do so by bearing, in this case too, against the end edge of the internal wall of the groove, providing relief for the operator manipulating the cover, in this case as well.
In addition, as can be seen in
FIG. 11
, the cover
14
is stabilized in the open position, in which it forms an opening angle greater than approximately 100° with respect to the general plane of the frame
12
, on the one hand, by its outer surface which bears against the external wall
26
of the frame and, on the other hand, by the chamfer
45
which butts against the external surface of the inner wall
24
of the peripheral border of the frame.
Complete overturning of the cover in the direction of opening is thus avoided.
It will appreciated therefore that the invention which has just been described, which uses ramps in the shape of a sector of a disc in order to guide the covering element in the course of its displacement, allows manipulation of the latter either translationally, for the putting into place and removal thereof, or rotationally in the direction of opening and closure. These operations are performed easily, in that it is not necessary to lift the entire covering element.
Claims
- 1. A highway device, comprising:a frame and a covering element for covering the frame, the frame includes an upstanding peripheral border with two walls delimiting a groove, and the covering element is equipped with a projecting peripheral lip which engages the groove in a frame-covering position, wherein the covering element further includes at least one ramp extending between the lip and an internal surface of the covering element, the at least one ramp being intended to bear on an end edge of the peripheral border of the frame and being operative to guide the covering element, so as to slide and rotate, when the covering element moves in relation to the frame, under an action of a force exerted on the covering element in a zone opposite the at least one ramp, and wherein the at least one ramp is provided on only one side of the covering element.
- 2. The device according to claim 1, wherein the at least one ramp has a sagittal section in a shape of a sector of a disc.
- 3. The device according to claim 1, wherein a free end edge of the lip comprises a chamfer constituting a stop for limiting a rotation of the covering element in a direction of opening, in conjunction with a free end zone of an external one of the two walls of the frame, on which an external surface of the covering element butts.
- 4. The device according to claim 1, wherein the covering element is equipped with grasping means situated opposite the at least one ramp.
- 5. The device according to claim 4, wherein the grasping means comprise a cutout formed in the external surface of the covering element.
- 6. The device according to claim 4, wherein the grasping means comprise a through-orifice formed in a wall of the covering element in a zone situated between a border of the covering element and the lip.
- 7. The device according to claim 6, wherein the lip forms an offset in a zone of said through-orifice.
- 8. The device according to claim 1, further including a lock for locking the covering element in a closed position, on the frame.
- 9. The device according to claim 8, wherein the lock includes a pivoting rod secured to a locking bar by means of two end limbs capable of being folded back, the bar being intended to be inserted beneath a stop of the frame.
- 10. The device according to claim 9, further including a seal interposed between the lock and the covering element.
- 11. The device according to claim 1, wherein the groove is filled with water and forms, in conjunction with the lip of the covering element, an odour trap.
- 12. The device according to claim 1, wherein the frame includes, at its base, at least one laterally projecting relief, the lower face of which is provided with a series of ribs for anchoring the device in an embedding material.
- 13. The device according to claim 1, wherein the frame includes anchoring ribs made in a median part of each side of the frame, the ribs being adapted to oppose bending of the frame.
- 14. A covering element for closing an inspection shaft or capping a drainage shaft, comprising:a projecting peripheral lip intended to engage in a groove of a support frame, the groove being delimited by a peripheral border of the frame with two walls, wherein the covering element includes at least one ramp extending between the lip and an internal surface of the covering element and being intended to bear on an end edge of the peripheral border of the frame and being operative to guide the covering element, so as to slide and rotate, when the covering element moves in relation to the frame under an action of a force exerted on the element in a zone opposite the at least one ramp, and wherein the at least one ramp is provided on only one side of the covering element.
Priority Claims (1)
Number |
Date |
Country |
Kind |
99 05717 |
May 1999 |
FR |
|
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/FR00/01033 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/68517 |
11/16/2000 |
WO |
A |
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4592674 |
Baliva |
Jun 1986 |
A |
4840514 |
Defrance et al. |
Jun 1989 |
A |
5362174 |
Yang |
Nov 1994 |
A |
Foreign Referenced Citations (4)
Number |
Date |
Country |
0451064 |
Mar 1991 |
EP |
0551046 |
Dec 1992 |
EP |
2688528 |
Mar 1992 |
FR |
529826 |
Nov 1940 |
GB |