EP1710374A2 - Abdeckungssystem für Werkstattuntersuchungsgrube - Google Patents

Abdeckungssystem für Werkstattuntersuchungsgrube Download PDF

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Publication number
EP1710374A2
EP1710374A2 EP20060358005 EP06358005A EP1710374A2 EP 1710374 A2 EP1710374 A2 EP 1710374A2 EP 20060358005 EP20060358005 EP 20060358005 EP 06358005 A EP06358005 A EP 06358005A EP 1710374 A2 EP1710374 A2 EP 1710374A2
Authority
EP
European Patent Office
Prior art keywords
apron
pit
drum
winding
deck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20060358005
Other languages
English (en)
French (fr)
Inventor
Gilbert Lebec
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1710374A2 publication Critical patent/EP1710374A2/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
    • E04H5/06—Pits or building structures for inspection or services

Definitions

  • the present invention relates to a system for covering pits for the maintenance of the lower parts of machines such as trucks and agricultural machinery and special works.
  • the technical field of the invention is that of the design of safety systems for the covering of excavations.
  • the mounting and maintenance pits present in the garages consist of a substantially parallelepiped cavity hollowed out in the ground, of a width less than that of the vehicles to be repaired, so that these can be positioned above the pit in the longitudinal direction thereof.
  • a first technique is to mark the edge of the pit with strips of bright or fluorescent paints or pavers or strips of texture different from that of the ground to prevent proximity to the pit.
  • a second technique is to close the access to the pit by stakes and chains or to cover the pit with gratings or beams that must be removed and then manually replaced before and after the use of the pit. Again, these techniques are not satisfactory; indeed, the establishment and removal of channels or gratings prove to be restrictive for the personnel who, in practice, do not put them in place after use of the pit.
  • the object of the present invention is to remedy, at least partially, the disadvantages of the covers and security systems for existing pits.
  • Another object of the present invention is to provide a pit cover system that can be installed in pre-existing pits without destruction thereof and without dimensional constraints either in depth or width.
  • Another object of the invention is to provide a system for covering pits whose implementation and operation are automatic and reliable, whose maintenance is easy and whose level of security it provides is optimal with regard to safety standards in force.
  • the cover according to the invention is particularly advantageous in that it therefore allows, without or with a minimum of facilities, to equip existing mounting pits in garages, especially for the maintenance of trucks and agricultural vehicles. for example.
  • the covering system of the invention can adapt to any type of pits existing, the length can be up to 25 meters, which was previously allowed by any rigid cover system known from the prior art.
  • the cover system of the invention does not hinder the movements of the operators inside the pit when it is discovered and therefore does not modify their working conditions.
  • This positioning of the winding device under the access staircase is particularly enabled by the small thickness of the apron blades which allows the winding of a large number of turns on the drum of the winding device, said drum thus being able to be of limited diameter at these side flanges, in practice with a diameter of up to about 1m, allowing the housing of the drum and its drive device under the stairs to the pit without destruction of it.
  • the roofing system according to the invention also has the advantage of having a very strong roofing apron capable of withstanding loads of at least 250 kg without breaking or bending the deck boards. This ensures the resistance of the pit cover when it is closed even in the event of a simultaneous fall of several people on the deck or vehicle wheel engagement or lifting tools on the cover.
  • the system of the invention comprises means for guiding said apron integral with the upper longitudinal edges of said pit and inside which the ends of said apron blades are inserted and slide under the combined action of said device. winding and / or said traction device so that the upper surface of the deck once unwound on said pit is substantially coplanar with that of the edges of the pit.
  • These guide means advantageously constituted in practice by welded or bolted U-shaped bars for example on the longitudinal walls of the pit, do not protrude with respect to the upper edges of said walls of the pit and therefore form no obstacle to the surface. of the floor of the workshop around the pit, which makes it possible to avoid accidental falls of operators by tripping on said guide means when the pit is uncovered.
  • the system comprises at least one device for controlling said winding device and said apron traction device, preferably located outside said pit.
  • This control device allows a simple, automatic and secure use of the pit cover system according to the invention.
  • said control device comprises calibration means of said winding device and said traction device adapted to adjust the speed and length of unwinding and winding of the deck during the cover and the opening of the pit following a control action on said control device.
  • said calibration means comprise at least one incremental encoder in contact with the apron connected to at least one management automaton of said control device.
  • Such an incremental encoder and the associated management automaton when setting the control device of the cover system, record the physical measurements of apron length wound and unrolled and converted into digital control data recorded by the controller, which, during the subsequent opening and closing phases of the pit can control the drive means of the winding device and traction , which operate in tandem at variable speeds, so as to adjust their operating parameters to achieve the winding and unwinding of the appropriate length of apron.
  • said apron comprises a safety sensor placed on the head blade of the apron, said safety sensor being connected to said control device so as to stop the apron when an obstacle opposes the movement of said apron on said guide means.
  • said winding device further comprises at least one sensor capable of detecting a movement of the winding of the apron on said drum, said sensor being disposed under said drum.
  • a sensor for example a position sensor, advantageously makes it possible, during the closing phases of the pit, to detect a large deflection of one or more turns of the deck wound on the drum of the winding device, which may be in particular the weight of the apron and the relative sliding of the blades forming one on the other, and a lower pulling speed than that unwinding of the drum.
  • the latter When such a movement is detected by the sensor, the latter sends an electrical signal to the management controller of the control device which stops the driving means of the winding device so as to lock the drum of said winding device while the apron continues to be pulled by the traction device, which causes a draw of the apron and the suppression of the movement.
  • said traction device is connected to said deck via straps or chains capable of being wound on at least one winder via said drive means of said traction device.
  • said traction device is installed in a box fixed on the end wall of the pit and which thus protects the winder and the drive means thereof.
  • said traction device also comprises at least one sensor capable of detecting a movement of the winding of said straps or chains under said winder.
  • This sensor has a function identical to that of the sensor disposed under the drum of the winding device to detect the "soft" apron, but at the retractor of the traction device of the deck.
  • said drive means of said winding device and said traction device each comprise at least one reversible gear motor respectively actuating said drum and said reel via at least one belt or at least one a chain and a pinion, said geared motors of said winding device and said traction device being actuated simultaneously by said control device which controls their speed and their direction of rotation.
  • the covering system of the invention is intended to cover a pit 1 suitable for the maintenance of the lower parts of vehicles such as trucks in the case where the latter is not used, so as to prevent people from inadvertently falling inside the pit.
  • the roofing system according to the invention makes it possible to automatically cover the hopper of the pit 1.
  • the metal strips of the deck 2 have a thickness sufficient to support a minimum load of 250 kg safely, about the weight of three adults without risk of breakage or bending of the blades.
  • the thickness of the blades of the deck 2 is low enough to allow the complete winding of said deck on the drum 3 of the winding device disposed under the access stair 11 to the hopper of the pit.
  • winding device of the deck 2 under the access stairway to the pit constitutes an essential advantage of the roofing system of the invention compared to the prior art, advantage resulting from the optimization of the space requirement. winding device and apron to allow their housing under the access staircase 11.
  • the various elements (drum 3, drive means 41, 42, pinion 5) of the winding device can be mounted, as shown in FIG. 1, on a support structure 12 fixed under the access staircase 11 of which the bearing is formed by a non-slip covering plate 13 covering said winding device and its said support structure 12.
  • the traction device of the deck At the end of the pit opposite the winding device is positioned the traction device of the deck, whose constituent elements (reels 8, drive means 91, 92) also mounted on a support structure 14 fixed to the wall end and the longitudinal walls of the pit 1.
  • the geared motors 41, 91 of the driving means are electrically connected to a control device 10 preferably located outside the pit 1 and whose housing 15 is shown in FIG. FIG. 2.
  • This control device makes it possible to actuate said geared motors 41, 91 simultaneously via contactors (push-buttons) with opening O and closure F located on the front face of the case 15 of said device. command 10 to trigger the opening or closing of the apron 2 of the cover system on the pit 1.
  • the opening and closing of the apron are performed semi-automatically. It is then appropriate for the operator to hold down the opening contactor O or the closing contactor F until the apron is completely wound on the drum 3 and the open pit or completely unrolled along the entire length of said pit 1.
  • Such a support on one of the contactors O or F triggers the activation of the two geared motors 41, 91 which respectively rotate the drum 3 and the reels 8 through the chains and / or belts 42, 92 in the direction appropriate to the winding or unwinding of the deck 2 in the rails 6 on the top of the pit.
  • the opening and closing of the apron can be performed fully automatically.
  • the control device 10 comprises calibration means of said winding device and of said traction device adapted to adjust the speed and the unwinding and winding length of the apron during the covering and the opening of the pit so as to set and record, when first operating the cover system of the invention, the operating parameters of that, and more particularly winding devices and traction.
  • Said calibration means comprise at least one incremental encoder, not shown in the figures, placed in contact with the apron 2 on a roller 16 for guiding and tensioning the apron so as to measure the length of the apron to unwind and respectively to wind up to cover, and respectively to fully discover the pit 1.
  • This incremental encoder is connected to a management automaton located in the housing 15 able to record the length of apron moved measured by the encoder.
  • the housing 15 comprises a switch 17 to 2 positions Normal / Learning (N and A in Figure 2) to choose the operating mode of the cover system.
  • the switch 17 is positioned at the position A to place the management controller and recording mode, the apron being completely wound on the drum 3.
  • the operator then presses the contactor F closing the apron 2 until it has been unwound from a length appropriate to the entire cover of the pit 1, this length being measured by the incremental encoder which transmits an electrical signal corresponding to the management automaton. Once this length is reached, the operator then switches the switch 17 to the normal operating position N of the system for the controller to record this value.
  • control device further comprises a series of sensors connected to the controller to change the normal operation of the cover system in case of problems.
  • a safety bar 18, situated on the head blade of the apron 2 constitutes a first sensor which makes it possible to detect the presence of obstacles opposing the advance of the apron 2 in the rails 6 during the phases of covering the roof. pit and triggers the immediate stop of the deck in case of support against it.
  • the management automat causes a stop of the geared motor 41 and thus stops the rotation of the drum 3 while the drive means 91, 92 continuous traction device they operate to wind the straps 7 and pull the apron 2, thus causing the removal of the clearance at the sensors 19.
  • two sensors 20, in this case forked cells called “web slack cells” are placed under the reels 8 of the traction device to detect movements of the straps 7 which can occur during the phases of winding of the deck 2 (opening of the pit) when said apron winds on the drum 3 at a lower speed than unwinding of the straps 7 at the reels 8.
  • the drive means 91, 92 of the traction device are stopped by the management automat while those 41, 42 of the winding device continue to operate to wind the apron, thus causing the removal of the movement of the straps 7.
  • the roofing system operates in a fully automated and secure manner for operators who have only to press one of the contactors located on the control box 15 to actuate the opening or closing of the deck 2, the set of unwinding and winding parameters thereof being controlled and adjusted by the management controller and the sensors 18, 19, 20 of the control device 10.
  • the casing 15 of the control device also comprises an emergency stop button 21 and a buzzer 22 to indicate the operation of the cover system , and lights 23, 24 supply and malfunction of the system.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
EP20060358005 2005-04-05 2006-03-31 Abdeckungssystem für Werkstattuntersuchungsgrube Withdrawn EP1710374A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0503341A FR2883899B1 (fr) 2005-04-05 2005-04-05 Systeme de couverture pour fosse de garage

Publications (1)

Publication Number Publication Date
EP1710374A2 true EP1710374A2 (de) 2006-10-11

Family

ID=35285595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060358005 Withdrawn EP1710374A2 (de) 2005-04-05 2006-03-31 Abdeckungssystem für Werkstattuntersuchungsgrube

Country Status (2)

Country Link
EP (1) EP1710374A2 (de)
FR (1) FR2883899B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017112377A1 (de) * 2017-06-06 2018-12-06 Balzer GmbH & Co. KG Altöltank in Grube

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2965836B1 (fr) * 2010-10-06 2013-08-02 Atelier Des Fermetures Sefers Dispositif de couverture amovible pour fosses
CN113027187B (zh) * 2021-03-04 2022-11-29 机械工业第九设计研究院股份有限公司 一种地表板链式汽车生产线安全地坑

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2646395C3 (de) * 1976-10-14 1979-05-10 Rhein-Bayern J. Hermanns, Kraftfahrzeuge, 8950 Kaufbeuren Abdeckung für Montagegruben
DE2941755C2 (de) * 1979-10-16 1983-01-20 Rhein-Bayern Fahrzeugbau GmbH & Co KG, 8950 Kaufbeuren Abdeckung für Montagegruben
DE4019779C2 (de) 1990-06-21 1997-06-19 Wilfried Werner Abdeckung für längliche Montagegruben
FR2674565B1 (fr) 1991-03-25 1998-09-04 Metal Meubles Dispositif de fermeture/ouverture de fosses de travail.
DE19627200A1 (de) * 1996-07-05 1998-01-08 Konrad Schneiderbanger Service-, Montage- und Demontageeinrichtung für Kraftfahrzeuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017112377A1 (de) * 2017-06-06 2018-12-06 Balzer GmbH & Co. KG Altöltank in Grube

Also Published As

Publication number Publication date
FR2883899A1 (fr) 2006-10-06
FR2883899B1 (fr) 2007-07-06

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