Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D29/00—Independent underground or underwater structures; Retaining walls
  • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
  • E02D29/14—Covers for manholes or the like; Frames for covers
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D29/00—Independent underground or underwater structures; Retaining walls
  • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
  • E02D29/14—Covers for manholes or the like; Frames for covers
  • E02D29/1409—Covers for manholes or the like; Frames for covers adjustable in height or inclination
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D29/00—Independent underground or underwater structures; Retaining walls
  • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
  • E02D29/14—Covers for manholes or the like; Frames for covers
  • E02D29/149—Annular gaskets

Definitions

• the present invention relates to a manhole or other similar road equipment.
• Such a look includes a frame embedded in the pavement provided with a circular central opening and an internal peripheral rib of seat, a circular-shaped buffer for closing the central opening of the frame and provided with an elastic support annular bearing against the rib bed when the buffer is in the closed position of the central opening of the frame.
• the elastic support is fixed on the frame and not the buffer.
• This kind of look is intended to be installed around an upper opening of a chimney access in the ground.
• the buffer must be put back in place in the frame to close the central opening of the latter.
• this implementation is effected by exerting on the buffer a thrust force sliding it on the ground until it enters the central opening of the frame.
• the present invention aims to overcome the disadvantage of manholes above known.
• the manhole comprising a frame embedded in the roadway and provided with a circular central opening and an internal peripheral rib of seat, a circular-shaped buffer for closing the central opening of the frame and an annular resilient support secured to the buffer or frame and which is supported on the rib of the frame or on an annular face of the cushion when the buffer is in the closed position of the central opening of the frame, is characterized in that the frame also comprises at least two housings formed radially in the internal border partially delimiting the central opening of the frame and the buffer also comprises at least two radially outer pins adapted to bear against the inner border of the frame when the buffer is placed on the frame coaxially with the central opening of the frame so that the annular resilient support of the buffer is above the rib of the frame without contacting it or below the annular face of the seat pad without contacting it and engaging respectively in the housing of the inner edge by rotation of the buffer relative to the frame to close the central opening of the frame by the buffer.
• the two housings of the inner border of the frame and the two lugs of the buffer are diametrically opposed.
• the pad is provided with a skirt located under the pad and engageable through the central opening of the frame when the pad is in the closed position of the central opening of the frame and which allows to position the pad coaxially with the central opening of the frame by sliding the skirt on the roadway and, where appropriate, on part of the frame when the pad is moved to the frame.
• the annular elastic support is fixed in an internal circular groove of the pad located above the skirt thereof or in a circular groove formed in the frame of the frame rib.
• the annular elastic support has in cross section an inverted T-shape whose transverse branch abuts on the seat rib of the frame or under the seat face of the buffer in the closed position of the buffer.
• each lug of the buffer is in the form of a substantially rectangular lug and each housing of the inner border of the frame is in the form of a substantially rectangular conjugate window.
• the buffer comprises a central orifice allowing the passage of a maneuvering tool, such as a grapple clamp, for rotating the buffer from its position at which the lugs are resting on the internal border of the frame at its closing position of the central opening of the frame to which the lugs are engaged in their respective housing of the inner edge.
• a maneuvering tool such as a grapple clamp
• the frame comprises a number of housings greater than the number of pins of the buffer.
• Figure 1 is a perspective view of a manhole according to the invention, the buffer initially completely clear of the frame is being put back in place in this frame;
• FIG. 2 is a perspective view similar to that of FIG. 1 and showing the buffer placed on the frame in accordance with the invention
• FIG. 3 is a perspective view similar to that of FIG. 2 and showing the rotation of the buffer relative to the frame towards the complete closing direction of the opening of the frame;
• - Figure 4 is an enlarged sectional view along the line IV-IV of Figure 3;
• FIG. 5 is a perspective view similar to that of FIG. 3 and showing the buffer in a position before complete closure of the opening of the frame;
• FIG. 6 is a perspective view similar to that of Figure 5 and showing the buffer at its full shutter position of the opening of the frame;
• FIG. 7 is an enlarged sectional view along the line VII-VII of Figure 6;
• Figure 8 is an enlarged sectional view similar to that of Figure 7 and showing an alternative embodiment.
• reference numeral 1 generally designates a manhole which comprises a frame 2 embedded in the roadway 3 partially represented and provided with a circular central opening 4, and a removable buffer 5 of circular shape for closing the circular opening 4 of the frame 2.
• the frame and the pad 5 are preferably made of cast iron.
• the frame 2 comprises a rib or peripheral radially inner collar of seat 6 on which abuts the buffer 5 at its closed position of the opening 4 of the frame 2.
• the pad 5 is provided with an annular resilient support 7 of flexible material, preferably an elastomer material, adapted to bear on the internal rib 6 of the frame 2 in the closed position of the pad 5 in the frame 2.
• the support Annular resilient 7 may have a double function of sealing between the frame 2 and the buffer 5 and noise reduction between the frame 2 and the buffer 5 at each passage of a vehicle on the manhole 1.
• the annular elastic support 7 has in cross section an inverted T shape whose rod 8 is fixed, for example by gluing, in an internal circular groove 9 emerging from a lower face of the buffer 5 and whose transverse or bearing branch bears against the seat rib 6 of the frame 1 in position closing the buffer 5 on the frame 2.
• the elastic support 7 has its rod 8 fixed, for example by gluing, in a circular groove 9 formed in the base rib 6 of the frame 2 and its bearing surface 10 bearing against a annular flat seating face 50 of the buffer 5 when the latter is in the closed position of the buffer 5.
• the pad 5 is provided with a central oblong through hole 5a allowing the passage of the end of a maneuvering tool, not shown, such as a grapple clamp or a lead bar, to move the buffer 5 its closing position of the opening 4 of the frame 2 to its position of opening of the opening 4 of this frame or vice versa.
• a maneuvering tool not shown, such as a grapple clamp or a lead bar
• the pad 5 is also provided with a cylindrical skirt 11 protruding under the pad 5 and engaging through the central opening 4 of the frame 2 delimited by the seat rib 6 when the pad 5 is in the closed position of the central opening 4 of the frame 2.
• the circular groove 9 accommodating the annular elastic support 7 of the buffer 5 is located above the skirt 11 of this buffer and is delimited by an outer peripheral wall 5b of the buffer 5.
• cylindrical skirt protrudes under the annular flat seating surface 50 of the buffer 5 and when the buffer 5 occupies its closed position of the opening 4 of the frame 2, the skirt 11 projects under the circular groove 9 of the rib seat 6 of the frame 2.
• the frame 2 comprises above the seat rib 6 an inner peripheral edge 12 defining with the seating rib 6 a rabbet delimiting the upper part of the central opening 4 and in which is inscribed in thickness the buffer 5 at its closed position of the opening 4 of the frame 2, so that the upper face of the buffer 5 is substantially flush with the upper face of the frame 2 itself substantially flush with the roadway 3.
• the buffer 5 comprises two radially outer pins 13 and preferably diametrically opposed.
• each radial lug 13 protrudes from the outer circular peripheral edge of the wall 5a of the buffer 5 substantially in the same plane as that containing the upper face of this buffer.
• the lugs 13 may be arranged projecting at a level below the plane containing the upper face of the buffer 5.
• each lug 13 may be in the form of a rectangular flat lug.
• the diametral length between the two free ends of the two lugs 13 is greater than the internal diameter of the inner edge 12 of the frame 2.
• the frame 2 comprises two housings 14 formed radially in the inner rim 12 and preferably diametrically opposite.
• Each housing 14 is in the form of a substantially rectangular window and, preferably, of form conjugated to that of each lug 13 of the buffer 5.
• the bottom of each housing 14 is located at a higher level relative to the rib of sitting 6.
• Figures 6 and 7 show the buffer 5 at its closed position of the opening 4 of the frame 2 and to which the two lugs 13 are respectively engaged in the two housing 14 so that the buffer 5 is inscribed in the rabbet of the frame 2 having its upper planar surface substantially flush with the upper planar face of the frame 2 and the annular elastic support 7 is supported by its bearing surface 10 on the seat rib 6 of the frame 2.
• each lug 13 is not supported at the bottom of its corresponding housing 14 and the buffer 5 causes by its weight a compression of the bearing surface 10 of the annular elastic support 7 resting on the seat rib 6 over its entire periphery.
• the engagement configuration of the lugs 13 in their respective housings 14 as shown in FIG. 8 is the same as that of FIG. 7, with the only difference that the elastic support 7 is integral with the frame 2.
• the buffer 5 in its closed position, rests uniformly on the bearing surface 10 of the elastic support 7 located between the annular surface 50 of the buffer 5 and the lateral edges of the base rib 6 delimiting the circular groove 9 of the frame 2.
• the withdrawal of the buffer 5 of the frame 2 to completely clear the opening 4 is performed using the operating tool with one end is introduced in an orifice 5a of the buffer 5 so as to arrange the buffer 5 on the road 3 near the opening 4 of the frame 2.
• the buffer 5 is slid towards the frame 2 by contact of the skirt 11 on the floor 3 with the help of the maneuvering tool introduced in the orifice 5a of this buffer as shown in Figure 1. During this sliding, the annular elastic support 7 does not contact at all the roadway 3 and is therefore preserved.
• the buffer 5 engages in the opening 4 by its skirt coaxially through the circular opening of the seat rib 6 defining the opening 4 and the two lugs 13 come resting on the inner edge 12 of the frame 2 as shown in Figure 2 which shows in connection with Figures 3 and 4 that the annular elastic support 7 of the buffer 5 is located above the rib of the seat 6 of the frame 2 without contacting it.
• the annular elastic support 7 does not come into sharp contact with the seat rib 6 unlike the previously known manholes, thus effectively protecting the annular elastic support 7 without risk of deterioration thereof.
• the elastic support 7 is integral with the frame 2
• this support is located under the annular face 50 of the buffer 5 without contacting it when the two lugs 13 rest on the border 12 of the frame 2, providing effective protection of this elastic support.
• the operator using the maneuvering tool introduced into the orifice 5a of the buffer 5, causes a rotation of this buffer relative to the frame 2 in the direction indicated by the arrows F in FIGS. 2 and 3 until to bring the two lugs 13 of the buffer 5 respectively above the two housings 14 of the frame 2 as shown in FIG. 5.
• the operator can operate the buffer 5 in the opposite direction to the arrows F according to the position relative lugs 13 and housing 14 to bring the lugs 13 above the housing 14.
• the lugs 13 slide on the peripheral edge 12 of the frame 2 without the annular elastic support 7 is in contact with the seat rib 6 of the frame 2 or without the annular seating face 50 of the pad 5 is in contact with the elastic support 7 when the latter is secured to the seat rib 6 , and during the release by gravity of the buffer 5 in the position shown in Figure 5, the drop height of the buffer is sufficiently small so that the bearing 10 of the annular elastic support 7 does not undergo significant crushing may deteriorate.
• the buffer 5 could comprise three pins 13, or more, regularly spaced from each other around the buffer 5 and can engage respectively in three housings 14 or more of the frame 2 also regularly spaced others.
• the number of housing 14 may be greater than the number of lugs 13.
• the frame 2 may comprise four housing 14 two diametrically opposite two while the buffer 5 may comprise only two lugs diametrically opposite.
• the above-described pavement of the invention is of a design making it easier to close the opening 4 of the frame 2 by the buffer 5 and repositioning the tampon 5 in its final position of closing this opening without risk of damaging the annular elastic support 7.

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• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Mining & Mineral Resources (AREA)
• Paleontology (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Vibration Dampers (AREA)
• Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47716098

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Citations (2)

Family Cites Families (7)

• 2012
  • 2012-01-25 FR FR1250720A patent/FR2986022B1/fr active Active
  • 2012-03-15 BE BE201200174A patent/BE1020845A5/fr active
• 2013
  • 2013-01-11 WO PCT/FR2013/050065 patent/WO2013110870A1/fr not_active Ceased
  • 2013-01-11 CN CN201380006520.7A patent/CN104066893A/zh active Pending
  • 2013-01-11 EP EP13704479.8A patent/EP2807308A1/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (1)

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