FR2639627A1 - Device acting as a movable floor closing car repair pits - Google Patents

Abstract

The invention relates to a device making it possible to close the repair pits in the event of them not being used; and to act as a floor for the repairer by setting to the desired level. It consists of a strong floor 1 resting on 4 nuts 3. Four threaded posts 2, guided at 4, are rotationally driven by a gear motor, through the use of a chain 6 and gears 5. The rotation of the screws 2 brings about the vertical movement of 1. The arrangement according to the invention is particularly intended for equipping the pits for repairing and inspecting heavy motor vehicles.

Description

DEVICE FOR MOBILE FLOORING
CLOSING THE REPAIR TANKS The invention Fig 1 relates to a floor1) movable vertically, supported by four threaded columns (2) guided at their bases in and moved simultaneously in rotation (by toothed wheels and chines by a motor device (gear motor).

The control device allows
10 - for the user alone to bring the floor to the desired level.

 20 - in periods of non-use, the automatic leveling of the floor with the workshop, prevents any accident to people and property.

 30 - in the event of intervention, to condemn any external command to maneuver when accessing the lower part.

 The device according to the invention is particularly intended to equip repair and control pits for heavy motor vehicles.

 The mechanism described can advantageously be produced by any more efficient means of transforming movement: ball screws, system, hydraulics ... cables ... mixed ect.

Fig 2 expresses a simple and compact solution. It consists of a ball screw G 25 pitch 5) and its nut
Immobilized in the floor (3) the guide by rolling a double row of angular contact balls (rests by means of a clamp) on the floor of the pit bottom. A pinion (i) drives the screw in rotation.

The drive system includes
10 - a motor device using an available energy source: electricity - water - compressed air - oil. It must provide security for slow movement and immobilization when stopped; we prefer an electric motor-reducer-brake group of current manufacture.

20 - a device for driving the screws from the motor: shaft + bevel gears, toothed belts, targets. We preferred a standard roller chain and sprockets system
Fig 3 shows in plan the possible arrangements of the columns and transmissions
- at A, a pit end with a reservation for the columns allows a rectangular floor shape.

 - in B, lateral reservations will be recommended in the case of several independent or solitary floors.

 - in C the equipment of an existing pit requires a cut of the floor.

 The movement of the floor can be used for the assembly - disassembly of heavy components, by interposition of trolleys.

Rails may be provided for this purpose.

FUNCTIONAL SPECIFICATIONS
"Mobile floor for YLPL pit"
The project must: 10 - be strong enough to allow the passage of heavy vehicles; 20 - consist of a non-slip surface; 30 - prevent accidental fall of equipment; - being able to adapt to existing pits 50 - using energy available in the workshops; 6Q - facilitate work by setting the floor to the correct level in relation to the intervention level; 70 - ensuring security:
A - people and property
by leveling the floor and the workshop (period of
not used)
B - of the user
exclusive user control by direct action on
piano, with a slow movement
C - repairman
isolation when accessing the lower volume
D - material
limit switches 80 - in the event of a breakdown, you should be able to:
a - manually release the engine brake
b - operate the system at the end of a screw (crank).

Claims (5)

R E V E N D I C A T I O N DI 1 - Device for the use and safety of repair pits characterized by a floor movable in the vertical direction in order to be able to close the pit when not in use. 2 - Device according to claim I characterized by a floor used by the repairer and, capable at rest of supporting a vehicle. 3 - Device according to claims 1 and 2 characterized by a slow vertical movement controlled by 4 threaded columns (or more) produced by ball screw systems. 4 - Device according to claims I and 3 characterized by a rotational driving of the screws effected by a chain, actuated by a motor-reducer brake. 5 - Device according to claims 1 and 4 characterized by an electric control ensuring at all times the safety of the user alone master of the movement, except when stopped, at the time when the floor is automatically leveled in the workshop.