FR2557964A1 - CONVEYOR-ELEVATOR FOR MOBILE FLOOR CERAMIC OVEN TROLLEYS - Google Patents

Abstract

A CONVEYOR-ELEVATOR FOR TROLLEYS OF CERAMIC OVEN FLOORS INCLUDES A FRAME 1 CAPABLE OF RECEIVING AN ELEVATOR 2 AND ITS ELASTIC MECHANISMS 3, 4, AS WELL AS A MECANISM 5 FOR TRAINING IN ELEVATION. RAILS 6, 7, ASSOCIATED WITH A TROLLEY 20 AND WITH A LOADING AND UNLOADING DEVICE 8, ARE POSTED ON THE FLOOR OF THE LIFT DEVICE. THE DRIVING OF THE CONVEYOR-ELEVATOR AND OF THE LOADING AND UNLOADING DEVICE IS PROVIDED BY LINEAR MOTORS 11. WHEELS 14 ARE FITTED WITH SUSPENSIONS 21.

Description

COTvoEUR-ELEVATEUR. ': UR LIGHT TROLLEYS

AT THIS CEILING IN SOLES DBEILES.

  The present invention relates to a conveyor-lift for oven trolleys with movable hearths, ensuring the transverse transport, with short dead times and weak doors by breakage, of floor trolleys in the head zones of installations with several railroad tracks, these trolleys being ex-

  training effect and e-anti subject to rails.

  According to the prior art, the convector lifters of the type mentioned above are generally known as sliding platforms.

  In this case, these vehicles are subject to rails, which pre-

  feel a very low height of achievement due to the agency-

  mutual cross and longitudinal paths, so that it

  has d.i be waived so far the incorporation of suspensions.

  Since the drive is provided by the wheels, the very ncobrous braking and acceleration processes cause very high wear of the wheels and rails, which is reflected in the form of "chattering" movements. Rolling rouvements

  are generated by the flanges of the drive wheels. All these in-

  fluenoes resulting from the design limit the increase in rendering

  when transporting very fragile objects from the ceramics industry

  mics, increase which should be obtained by an improvement of the processes of displacement, braking and acceleration. As charging and extraction devices, there are known drives by friction rollers, piston lifters and chain and rack drives. All these devices suffer from the disadvantage that the lengths of the thrust are limited and that, in addition, a possibility of charging and extracting is only partially offered on one side. This inconvée_-Lt must be eliminated, by the invention

  in accordance with patent DD-95031, appeared the fact that the sliding platform

  health is equipped with a chassis movable longitudinally and trans-

  versally, which is automatically deposited on the cylinder core on

  the longitudinal track or the transverse track and can thus acccn-

  folding of itself both the transverse movement and the longitudinal movement. Thus, a separate device for placing in the oven and extracting it is not essential. The disadvantage lies in the fact that this device cannot be used in the presence of longitudinal tracks closely juxtaposed when floor carriages are placed on these tracks. In addition, the lane change is not

  possible only with rails of the same level and branching at right angles.

  According to patent application DE-B-1 272 956, we also know

  a sliding platform for conveyor carts carrying a sliding plate which is placed on rails, can be connected by rarpes to the path of empty carriages and to the path of full carriages, and on which the conveyor carriages are hauled

  laterally by means of mechanical devices (threaded pins).

  According to patent DE-2 745 525, the transfer of railway vehicles from one track to another track angularly offset is ensured by means

  of a "sliding platform with turntable". In these provisions

  tives also, the charging and extraction lengths are limited

  moths. It is also known to produce the charging device.

  ment and extraction in the form of an automotive device, e.g.

  example of a tractor. However, this tractor also does not allow

  a two-way haulage if you don't make any changes

  immortal tions. However, the disadvantage of the relatively limited push length no longer exists in this solution using a tractor. Another difficulty is raised by the smooth transfer of the floor carriages between the stationary rails and the rail sections mounted on the sliding platform. In accordance with patent application DE-B-1 780 350, this drawback is eliminated by the fact that the joining rail is fixed laterally at the ends of the sections

  platform rails and its running surfaces are available

  sées higher than those of said sections of rails, and by the fact that the transport carriage also has a respective roller installed coaxially with each wheel considered and whose radius of the tread is less than that of said wheel, a value

  maximum corresponding to the height difference between the over-

  rail running faces. With this embodiment, it is only necessary to provide two rails - junction which are fixed to the rail sections having a bearing section

  integral, apart from the abutment gap. The downside is

  of in the relatively great complexity of this solution because, in fact, the wheels of all floor trolleys must be equipped

  additional pebbles. In addition, the drawback remains.

  insisting that the chassis of the sliding platform exhibits different warping due to differences in stress and

  in that, therefore, absolute loading and unloading

  also at the same level are not possible.

  According to patent DE-1 021 011, there is also known an ins-

  sliding platform installation fitted with a lifting device through which the vehicle can be lifted, relative

  with the sliding platform remaining on its runway, only

  a distance corresponding to the height of the conventional rod

  vehicle wheels. This embodiment does not authorize the use of

  only in installations in which the road tracks

  are at identical levels.

  According to the prior art, the training takes place continuously. Electric motors are used which can be continuously selectively regulated and provided with mechanical transmissions, or else electric motors provided with hydrostatic drives. Since particular importance must continue to be given to smoothly accelerating and braking processes, the technical complexity of these drives is relatively great. This complexity is further increased by the fact that the desired position is not obtained

  only approximately during the adjustment process, and that an ap-

  close to the precise position is obtained by additional devices

  particular silences. Then there is another functional process.

  tional, that is to say the locking process as described, between

  others, in patent application DE-B-1 229 131. With the help of a

  smooth dovetail rigidly fixed next to the runway

  the platform, this sliding platform is first and foremost

  trée, then locked in relation to a nearby branch line. According to the current state of the art, the sliding platforms are adapted to the technical circumstances of the field of application considered. This adaptation is necessary because the mutual arrangement of the installations with longitudinal tracks and

  transverse routes are different depending on the companies concerned.

  In this way, it is not possible to carry out a standardization

in large scale.

  The subject of the invention is a conveyor-lift for carriages of ceramic hearths with movable floors, the technical design of which

  is such that it allows acceleration and braking nota-

  considerably larger, without damaging the very fragile products of

  the ceramic industry to be transported.

  In addition, operation with little impact must be achieved during other working processes, for example when adjusting the vehicle and when the carriages are moved alternately on the conveyor-lift. To ensure

  universal use of this conveyor-lift, an adapta-

  tion under different conditions between the lead and the trans-

  versale should be possible. In addition, the pushing device must

  also meet different requirements relating to management

  thrust force and applied thrust force. The conveyor

  of the aforementioned type must be designed so as to bring together all

  prerequisites for fully automatic operation.

  The object of the invention is to replace the technique with sliding platforms, hitherto conventional, by a conveyor-elevator of a new type, of increased efficiency and operating with little impact. An increase in output by an increase in speed is only possible when the conveyor-lift has significantly improved flexibility of movement. In accordance with

  the invention, this is obtained by the fact that it is provided, in a chas-

  sis of particular realization whose support elements are

  wind over the load, one dir:; positive elevator fitted with a

  suspension, which is lifted and suspended in the elastic elements

  ques during the movement, and deposited on the ground during the respective processes of charging and extraction. The particular advantages which result therefrom are that, due to the lowering of the lifting device on the ground, the influences exerted

  by the warping of the chassis as a function of the stress

  and therefore, there is the possibility of loading and unloading at the same level, independently of

  the constraint. Adjustable stops allow the lifting device to

  to be adapted to different differences in level between the trans-

  sideways and longitudinal tracks. This allows universal use in various ceramic factories in which the tracks are arranged differently, the replacement of installations

  which can be carried out with a complex transformation

  minimum ration. The lowering process in the push zone

  simultaneously activates the adjustment and brake braking functions

  mobilization and also creates, in the case of a specific achievement

  as rail ends, the -zonditions allowing a smooth transfer of the floor trolleys, from the conveyor-lift to the longitudinal tracks, or vice versa. This solution is made possible by the fact that, as a result of the lifting stroke of the lifting device

  when moving, the ends of the rail sections on the plan-

  expensive elevator can move over the ends of rigid laying tracks. Depending on the requirements, it is possible to achieve any conceivable flexibility of suspension and movement, because the lifting stroke creates the necessary path traveled by the damping system. So for example, the constraint by

  shock can be suppressed as soon as it occurs due to the use of

  tion of tires, and / or the wheels as well as the lifting device can also be suspended. With the same basic embodiment, it is possible to use wheels secured to rails, or

  many independent track wheels. These wheels are suspended indi-

  empty, which guarantees a statically determined condition.

  All the wheels are thus in contact with the ground and an inappropriate

  pitch movement disappears. The ability to adapt to different

  ferent track spacing is no problem. On the floor of the lifting device, it is possible to selectively install, in addition to other known loading and unloading mechanisms, a hauling device installed on one side, increasing the pushing force.

  and built as a tractor, or as a self-propelled

  bile fitted with one or more linear motors. These two variants have the advantage that the lifting and lowering process can take place on a rigid support surface when the lifting device is placed on the ground. A transfer ensured via the lifting platform is only possible with the automotive device with linear motor, as the realization of this device gives it a sufficiently modest height so that it can pass below: sole carts. This solution allows an extended hauling in space, as well as a waiting position

  on both sides. Thanks to the use of a securing device

  by mechanical or other means of incremental detection

  of measured values, movement control and positive assignment

  can be done by hand or completely

  automatic. The conveyor-lift of the floor trolleys is driven by linear motors. The latter guarantee operation with little impact and low noise, affected by low maintenance complexity and fulfilling the conditions for optimal movement. This results in the elimination of the drive via the wheels, as well as the wear of the

  wheels and the unwanted rolling track "brou-

  tages ", and therefore inconvenient impact constraints.

  The juxtaposition arrangement on several tracks of floor trolleys, known in the art using sliding platforms, is also possible in the basic design according to the invention

  of the conveyor-lift of these carts.

  The invention will now be described in more detail by way of

  in no way limitative examples, with reference to the attached drawings on the-

  which: Figure 1 is a side elevation of the conveyor-elevator according to the invention;

  Figure 2 is a schematic front view of said conveyor

  elevator; Figure 3 is a schematic representation of an abutment embodiment between rails rigidly placed and the abutment ends of the rails of the lifting floor;

  FIG. 4 schematically represents an ascent movement

  nel resulting from an adjustment of the oscillating rods of the wheels; and Figure 5 schematically shows the arrangement of several

  lifting devices on a conveyor-lift of floor trolleys.

  A lifting device 2 is installed in a chassis 1 of a carriage, having a particular embodiment and the elements of which

  are located above the load. The elevating device

  slightly raised by means of a drive mechanism

  in elevation by means of springs 4, and it is locked laterally

  ralement via a mechanism 3 with springs. Under these conditions, both the lifting device 2 and a floor carriage 20 are suspended in the springs 3 and 4 during movement. The

  mechanism 3 with springs ensures a damping of the oscillations amplitudes

  latoires which are triggered by the springs 4 in the event of stress

  by dchocs. Rails 6 associated with a traveling load device 8

  ment and unloading, as well as rails 7 cooperating with the cha-

  riot de sole, are fixed to the floor of the lifting device. Extremes

  mites of these rails have complementary configurations and they penetrate the ends of the head track in the way

  illustrated for example in Figure 3, so as to guarantee a tran-

  sition smoothly. This solution is made possible by the fact that, as a result of the lifting stroke of the lifting device during movement, the ends of the sections of rails of this lifting device can move above the rails placed rigidly. The device 8 for loading and unloading is equipped with a linear motor. This results in the advantage that this mobile device can be kept low enough to be able to circulate below the floor trolleys. Loading or unloading on both sides can be carried out without difficulty, the excursion length being in principle unlimited depending on the current feeding mode. In order to shorten downtime, it is desirable to plan a quick trip without floor carts and a trip accompanied by precautions when transporting these carts. This is permitted by relatively simple adjustments, in particular by adapting

  optimal motor function depending on the load. When lowering

  the lifting device 2, a damping spring 9

  Special guarantees a shock-free coming into contact with the ground.

  cmnitanent, a precise blocking is ensured by a centering means 10 and by a complementary positioning means 17 disposed on the

  transverse transport track. Training takes place by the intermediary

  diary of one or more linear motors 11. During a pro-

  respective acceleration or braking stops, these linear motors 11

  are successively engaged or triggered, which makes it possible to reach

  dre an optimal acceleration and braking characteristic. Depending on requirements, individually mounted wheels 14 are produced in the form of wheels without flanges rolling on rails or, in the absence of rails, in the form of wheels with elastic coating,

  preferably rubber wheels. They are suspended by the inter-

  medium of elastic elements 21. This design of the individual mounting and suspension guarantees a statically stable condition, all the wheels are in contact with the ground and a pitching movement is suppressed. Emergency and immobilization brakes 19, free

  drive energy, are incorporated in the wheels 14.

  lets 13 to maintain the direction of travel, rolling in pairs in ri-

  12 goles, guarantee the maintenance of the direction of movement. They

  are made so as to be kept applied continuously

  be the internal face of the channels, and thus avoid rolling of the

  voyeur-elevator of floor carts. Said channels 12 symmetrically dug house the necessary electric cables 15, as well as a

  mechanical securing device 16 consisting for example of

  ple in a chain passing on a cylindrical wheel with teeth or in

  mechanisms with similar modes of action, as a pathway device

  non-skid roof, free from slippage and acting by grip for optimal movement and positional allocation

processed by processors.

  FIG. 4 represents an ascending mncuvenment caused by an adjustment of oscillating connecting rods of the wheels, these connecting rods being identified by the reference 18 and constituting length adjustment devices. Several lifting devices can

  be arranged in juxtaposition and / or in succession on the chassis 1.

  It goes without saying that many modifications can be made to the conveyor-elevator described and shown, without leaving

of the scope of the invention.

R1EENDICATIONIS

  1. Conveyor-lift for ceramic kiln carts

  movable floors, operating with little impact, conveyor

  lift characterized by the fact that it includes, on a chassis (1) of particular construction and whose support elements are above the load, a lift device (2) having rails (6, 7 on its floor) ) whose ends have

  a configuration additional to that of the head channels, selected

  tively a device (8) for loading and unloading preferably provided with a linear motor, springs (9) for special damping on the underside of said floor, as well as a centering means (10); elevation drive mechanisms (5); linear motors (11) installed on both sides; wheels (14)

  individually mounted and fitted with a suspension (21); ga-

  direction-of-travel lets (13), arranged in pairs in

  channels (12) symmetrically dug into the ground; as well as

  positive (16) of securing by mechanical grip, for example

  racks, cylindrical toothed wheels or chains.

  2. Conveyor-elevator according to claim 1, characterized in that the wheels (14) are wheels without flanges rolling on rails or else wheels with elastic coating, preferably rubber wheels; and by the fact that energy-free brakes (19)

  are incorporated in these wheels (14).

  3. Conveyor-elevator according to claim 1, characterized in that a means (17) for additional positioning is disposed

  on the transverse transport track with respect to the centering means (10).

  4. Conveyor-elevator according to claim 1, characterized by

  the fact that the elastic elements (21) are complemented by arrangements

tifs (18) for length adjustment.

  5. Conveyor-elevator according to 13 claim 1, characterized in that several lifting devices (2) are installed next to each other and possibly, or alternatively, the

  one behind the other on the chassis (1).