DE2849707A1 - Storage cupboard for cine film and video recording equipment - has vertically movable table-top section for projector and inner shelves - Google Patents

Abstract

The castor-mounted cupboard has a vertically movable table (2). It is designed to take a projector or the like which can be raised or lowered by an electric motor or manually by cables, gearing or the like on a shaft (10) at the back of the cupboard (1). When not in use the shaft (10) can be covered by a displaceable tabletop (3) while the doors (4) of the cupboard can be fitted out with shelves etc. All the equipment required for the fast-growing hobby of home filming and video recording can now be stored easily accessible in its own cupboard.

Description

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- Photo and video library - - -

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The leisure activities of photography and film are no longer a privilege of a small section of our society. This hobby, which can already be carried out with limited resources, encompasses large sections of the population and is already leading to clubs and special-purpose associations. Nevertheless, this activity remains closed to a large number. The intensification of film and photo leisure activities is less due to the associated costs or lack of free time rather than being hindered by suitable work rooms or places. An unsuitable environment or Inadequate work equipment makes a hobby a burden. This also applies in a modified manner to the commercial one Occupation with photos, films, training television, video technology, etc. Not only does the joy of the job suffer here, but also the work ethic and thus the profitability. Suitable furniture could help here. It should be independent of the workplace, be easy to move, allow comfortable working and a clearly arranged storage of the devices, tools and work equipment.

The photo and video library according to the invention closes this gap. Above all, it offers hobby filmmakers a convenient place to work and show. All necessary equipment, such as cameras, flash or lighting accessories. Cutter, cassettes, slides, etc. can be stored in a clearly arranged manner. On an assigned board, a projection device from a lockable shaft can be lift-like can be raised, continuously height-adjusted and brought into a demonstration position absolutely vibration-proof. A sufficiently large work table with devices that are easy to grasp, Tools and materials are available. When locked, the work equipment is protected from unauthorized access. In the locked state as well as open is the Photo and video library can also be easily moved. Locked

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sen it is also an architecturally beautiful chest-like one Furniture.

In a correspondingly enlarged scope, such a photo and Video library also conceivable as a cutting table in the film studio. The ready-to-hand availability of the work equipment from the seat makes it an economically viable working space. Even more noticeable is the economic use of the photo and video library in schools, lecture halls, Classrooms or lecture rooms, for film or slide shows with school or video television, telex and the like by means of the mobility and the stacking of the teaching materials in the narrowest space. In summary, it can be seen that the invention can be used in many ways, however must be dimensioned according to the intended use. The special features of the invention are not thereby changes.

The photo and video library according to the invention is movable on rollers Cabinet with a retractable shelf for all kinds of image and sound projection equipment, projection equipment, antenna, Wired and video televisions or work equipment such as teleprinters, Film cutter, film sound converter, etc. A lowering table is electromotive or manual through screw spindle lift, cable pull, Rack and pinion drive or the like can be opened like an elevator from the shaft assigned to the rear part of the cabinet. The shaft is covered by a sliding table top and on the front by box-like or shelf-like wing doors lockable. The lowering table height and the shaft immersion depth determined in this context can be set up or fixed installation of one or more devices, such as projection apparatus, etc., even when the descender is retracted to. In addition, the shelf-like design offers sloping side walls and air-termination strips a clear well tangible shelf for cassettes.

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The locked cupboard and the covered shaft with the tabletop inserted is secured against access using a cylinder lock in one of the door boxes. Of the axial lock extension, two turning bolts are molded, which protrude in assigned grooves of the neighboring door box and the table top.

As already mentioned, the door leaves are designed as door boxes with an intermediate shelf that can be adjusted as required. Instead of the Intermediate shelves can also be used to hold tools and small parts, and these can even be designed as drawers can.

On four flange-like corner plates of the cabinet base frame and castors are arranged below the door box as far as possible from the hinge. You don't just let the unhindered movement of the photo and video library, but above all enable the door boxes to be swung open with absolute security against tipping over of the cabinet. When locked, the photo and video library acts as a chest, so to speak Only modest space required, due to the possibility of changing location and the pleasing design can ultimately be found in every living space.

Another advantage is the possibility of assembly, which in the modular system can even be carried out by the user after the individual parts have been delivered. This would provide a very economical production and procurement option. This is supplemented by the not very bulky design and thus inexpensive packaging option.

The photo and video library consists of eight main parts. The back wall of the cabinet, the side panels and the base are screwed together to form the cabinet. The box doors are hinged to this by means of the articulated baths, the lowering table is inserted and

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and the pull-out table top pushed in. Be last the swivel castors screwed underneath and essential functional parts for lowering table actuation such as electric motor, converter, bevel gear drive with crank, pulling unit etc. mostly in one piece built-in. The lowering table is installed together with the guide elements, the threaded spindles or guide rods, the choice of which is determined by the type of lifting aid mentioned above. The various confirmation devices are among themselves not interchangeable and interchangeable. Only one function system can be installed for the lowering table lift. This one the main components are also molded.

One of the possible lowering table actuations is the screw spindle drive. Threaded spindles that are synchronized to stretching by means of a chain drive are inserted into assigned nuts on the lower table floor effective and raise the lowering table evenly and safely. The threaded spindles are driven by a Electric motor mechanically or manually using a hand crank and intermediate bevel gear drive. One attached to the closet The closed position of the foldable crank would not be a disruptive factor, either visually or spatially.

Rope drives that work on the principle of rope pulleys with a weaker spring and spiral pulleys with a more powerful spring At the same time represent a lifting aid via the rack increase, the alternative to the screw drive would be. you need hardly any electric motor drive. The spiral roller drive would even be a manually convenient, almost massless lowering table lift.

The reference to the good architectural properties of the Photo and video library as a piece of furniture indicate the type of production made of wood, veneered or lacquered. This is absolute possible. The assembly of the cabinet would take place according to the known technique of add-on furniture. The functional parts

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for the lowering and extending tables would be the same as those for other types of steel or light metal. Instead of a wooden structure the photo and video library could be a plastic, steel or light metal1 construction. The plastic version would be cleverly done using fiberglass-reinforced panels or vacuum-drawn panels, on the other hand Metal construction basically by means of reinforced and folded profiles Sheets would have to be made. By means of a suitable surface treatment from painting to sintering to enamelling very attractive decorative furniture surfaces could be created which would also give the metal photo and video library the character of a piece of furniture. Would be very attractive too a mixed construction, light metal, wood and others.

Of course, every construction method has its own character and thus minor changes compared to another. The sheet metal construction is not the most architecturally beautiful but be the most expedient. Two associated columnar folds of the cabinet rear wall and the side panels are located at the same time to each other and are screwed with through bolts, the base is also screwed to its frame on the Sheet metal panels on the three side walls. The door boxes are attached by means of hinges to the folds of the side parts, which are in turn assigned attached. The fasteners are countersunk screws. The door boxes consist of two folded, double! -U-shaped corner pillars, which are connected by an angled sheet metal. The optional many intermediate shelves of each door box are adjustable as required. In contrast, the door box jacket is dotted or stretch-welded.

The functional options in the The connection with the material-bound construction is illustrated by a detailed description of the photo and video library according to the invention supplemented according to the drawings.

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Fig. 1 is the front view of the opened photo and video library in wood or sheet metal design with screw spindle stroke, extended table top and raised lowering table in a perspective view.

FIG. 2 is a top view of FIG. 1, but in a steel or light metal sheet design, with the door box partially folded in, in a technical illustration.

Fig. 3 is the central horizontal section through FIG. 2 and at the same time the vertical central section through 4 according to the line II - II, but with the door box closed.

Fig. 4 is the vertical section through Figures 2 and 3 according to the lines I - I, but with a hand crank drive instead of the electric motor in the Reference figures.

Fig. 5 is the front view of a photo and video library without Door case, with extended table top and raised lowering table, but instead of the one in earlier Figures used screw spindle with a cable worm gear drive, which in the partial section (-after the Lines IV - IV in Fig. 6-) and is interrupted again with a further partial section (after the lines V-V in Fig. 6).

Fig. 6 is the side view of Fig. 5, but in the locked state of the photo and video library with folded door case, retracted lowering table and table top and with a partial section of the left side part of sheet metal cladding according to the lines III - III in FIG. 5.

The drawings and especially Figures 2 to 6 represent a

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Sheet metal construction of the photo and video library according to the invention . A precise material definition would be light metal or Steel do not make a difference in construction and function, but have a significant effect on here weight finding and the economical production method not to be explained. The essentials and the invention Characteristic design features are not different hereby and also not shown by the figures Actuation options of the lowering table stroke touched.

The main component is in any case the cabinet 1. All other add-on or functional parts are articulated or built into it. It is open to the front and consists of four parts screwed together, the rear wall 14 _S, the side parts 11, 12 and the bottom 15. To make the seams of the individual parts as little visible as possible, the connection between the rear wall and the side parts is placed on the back of the cabinet and that of the side walls with the floor are kept invisible at all. The respective screw connections are not unwieldy. The sheet metal deformations take this requirement and, above all, the static stability into account. So the rear wall 14 is a sheet metal with a U-fold formed on both sides. To stiffen the upper edge, a square tube is dotted or welded between the U-folds. The folds on both sides are cut out at the level of the bottom, so that a freely hanging sheet metal tab rests against the base frame 16. It is connected to this by the screws 96.

The side walls 11, 12 are also deformed sheet metal parts, The sheet metal plates are folded on both sides and folded again in a U-shape. The fold is necessary to make the separating seam between To lay the side parts and the rear wall on the back of the cabinet and an easy-to-grip screw connection between the side panels

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to create walls. The fold 13 is in contact with the rear wall 14. The front side is the side part 11, 12 as an edge termination and also a Z-fold 18 molded on for stiffening. The upper edge reinforcement is, similar to the rear wall, a square tube is provided that with a stirrup-welded, angled extension also the bevel connection for Rear wall 14 stiffened. The square tube is attached by means of spots or welding. It protrudes significantly beyond the front fold 18 and serves as a mounting rail 17 for the telescopically guided guide rod 30 of the table top 3 Groove 19 enables the table top 3 and guide rod 30 to be connected by means of screws 34 and spacer 32. For this purpose, the spacer is slightly thicker than the square tube thickness 17 and slightly smaller in diameter than the groove width 19. The length of the groove determines the table top extension through the spacer stop 32. To break through the mounting rail 17 through the fold 18 is cut out associated with this. The front and rear folds 18, 13 are on the underside also cut out at the level of the bottom 15. The freely hanging sheet metal flap created in this way serves as an attachment to the Base frame 16 and is fastened like the rear wall 14 with the same countersunk screws 96. Under the mounting rail 17 the flat bar 52 is welded. It serves the threaded spindles 5 as a storage. It can be unilateral and with the arrangement of one A crank instead of an electric motor drive via a threaded spindle 5, a bevel gear housing 58 can be replaced.

The floor is a base frame 16 covered with a sheet metal plate. It is a rectangular, miter-welded angle profile frame, which is reinforced by a central rail 98 and 90 in the corners by flanges. The middle rail 98 and the horizontal angled flanges are supported by the base plate in dotted or stretch-welded fashion. The flanges 90 are Welded as corner reinforcement and as contact plates of the swivel castor on the lower edge of the base frame 16. Under the center rail the bridge web 56 is provided. He receives an elongated hole

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55 for receiving the screw bolt of the tensioning pulley 54.

The base frame 16 has threaded holes for receiving the fastening screws of the rear wall 14 and the side parts 11, 12. The vertical connecting seam of the side parts 11, 12 with the rear wall 14 is, as already mentioned, given by the facing of the associated folds 13 against each other and is carried out by screwing by means of the screws 99.

The table top 3, preferably made of laminated wood, is with two position and dimmensions according to the receiving rails 17 of the Enclosure 1 assigned mounting rails 30 reinforced. To allow the telescopic movement below the table top 3 in To enable the square tubes of the mounting rails 17, they are mounted at a certain distance from the underside of the table top. It is slightly larger than the wall thickness the receiving rail square tubes 17. This is, as already mentioned, by interposing the spacer 32 and the Fastening flange of the handle 33, which is profiled at right angles, between the table top 3 and the guide rail 30 is reached. To fasten the guide rail 30, the screws 34 are used, which are anchored in dowels 35, inserts or the like for safety reasons. The shorter screws 36, which are only used to fasten the handle 33, only engage in Wood. For engaging the locking bar 70 of the lock 7 a groove 31 is provided in the table underside 3.

The door boxes 4, mirror-inverted, consist of the two double-U-FaI z columns 44 and the front plate 46. The rebate columns 44 are the same and with their backs form the side walls of the door boxes and with the legs protruding on the inside, the receiving bar of the intermediate floor perforations. The front plate 46, bent at right angles above and below, forms the Front wall of the door box and with the bevels the upper and lower borders. The sheet metal construction is welded. the

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The intermediate shelves 43 lie on commercially available hooks * Art on and the latter are inserted in the mentioned optionally many holes 47 of the receiving rims of the folds. On each The hinge on the outside of the door case is double-U-shaped 8 firmly attached by riveting, welding, spots or the like. The connection of the door box 4 with the cabinet 1 takes place by means of the screws 42 and the free hinge flange against the fold 18 of the side parts 11, 12.

A cylinder lock 7 is provided on the left door case 4. It is about one of the locking requirements, the locking of the to meet inserted table top 3, very close to the top edge of the door box. In the middle of the lock nut extension is the Door case turning bolt 71 and the tabletop turning bolt 70 on the front wall side. As a striking plate for the door lock bolt A breakthrough in the neighboring door case side wall is used, which is reinforced 44 for safety reasons. For the same reasons, there is also a reinforcing plate 41 over the receiving groove 31 of the table top rotating bolt 70 placed.

A swivel castor is screwed underneath each door box, each below the lower edge and, if possible, closer to the center of the cabinet. They not only support door box actuation but above all guarantee that the photo and video library.

The lowering table 2 is not only used to hold the demonstration device but is also a magazine shelf. The ones arranged in parallel The table top 20 and base plate 21 are each connected on the outside to the trapezoidal side walls 21. she are flush on the front with the table and floor and on the back tapered at the bottom. This arrangement enables unhindered access to the magazine store. To keep the magazines safe To give support, the strips 24, 25 are provided. You

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bind the side walls 21 on the front side approximately on the lower third of the lowering table height and as a rear strip 25 as a back " Current end of the base plate 22.

The lowering table 2 is in the shaft-like interior of the Cabinet 1 can be lowered. The depth of the shaft 10 is not solely through the lowering table height 2, but also through the Determines the size of the demonstration device to be sunk. Of the Elevator-like transport of the lowering table 2 is made possible by the action of the at least three rotation-synchronized threaded spindles 5 accomplished in associated nut bushings 26 embedded in the base plate 22. The threaded spindles 5 are to achieve a good lowering or lifting speed of the lowering table 2 multiple times. But at the same time they are self-locking to allow the lowering table to move independently 2 to prevent.

The threaded spindle 5 are already set off and are with " the tapers 51 in the associated bearing and with the collar on this. It is sufficient as a guide bearing on the spindle head a sintered or plastic bushing which is let into the guide rails 52 of the side parts 11, 12. at the choice of the crank actuation for the lowering table stroke instead of the electric motor drive would be a side part (according to Fig. 4-) instead of reinforcing with a flat bar 52 with a housing 58 of a bevel or helical gear. the In each case, the spindle foot is mounted in an axial deep groove ball bearing, which is in an assigned housing 50 is attached below the base frame 16 by screwing.

The lower threaded spindle tapers 51 protrude through the bearing housing 50 and take on a sprocket. The chain connects the at least three chain wheels 53. The necessary tension is generated with a tensioning roller 54. The preferred

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The tensioning roller 54, which is made of plastic, is inserted in an associated elongated hole by means of a stepped threaded pin * 55 of the already mentioned bridge web 56 is fastened in the base frame 16. The setting is easy with this type of installation feasible.

The threaded spindle 5 is driven by an electric motor 57. According to FIGS. 1, 2 and 3, this and the associated Converter mounted on the floor panel and one of the side panels approximated. For safety reasons, a 24 volt Used aggregate. The drive shaft breaks through the cabinet floor 15 and transmits the torque by means of a chain wheel 53 on the sprocket drive. The electric motor turns clockwise and counterclockwise. The switching unit is on the side wall 12 appropriate. An automatic off switch interrupts the motor activity when reaching the upper or lower drive-up position of the lowering table 2. The end positions are Given by striking the base plate 22 against the flat rail 52 and the floor panel 15.

The low effort required to actuate the threaded spindle and thus to lift the lowering table, in addition to the electric motor A manual drive can also be examined using a crank mechanism. As already mentioned, the spindle bearing is in such a case in the flat rail 52 by a bevel gear housing 58 to replace. By means of the crank 59, which can be folded onto the side part 11, (according to FIG. 4) via the bevel gear drive 58 the threaded spindle hyb system is also synchronized with the sprocket put into action.

Another type of actuation of the lowering table lift is the cable drive . There are several types. The ones that could be used here would be the rope pulley and the spiral pulley system. At could also with each other be combined. During a pulley transport could be accommodated with moving rollers and a tension spring in the side parts 11, 12 below the receiving rail 17,

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is the spiral roller operation (as shown with Figures 5 and 6) Can only be mounted below the lowering table base plate 22 by means of a spiral spring. In this case, the latter would have next to the favorable mounting option still has the advantage of weight compensation to work and to increase this up to massless lowering table transport. On the other hand, the aforementioned could be used Rope pulley drive is offered only a small lifting aid.

The spiral roller drive would in the case of a massless lowering table transport, caused by the inertia, the lowering table 2 without a special lock in any drive-on height lock. The pulley drive, on the other hand, would not act on any Case without a lock. For this purpose, however, an effective on the guide rod 6 could be lifted by means of a lever Blade or roller clamp can be used. Despite the necessary greater spring force, the spiral roller operation would be due to preferable to the pulley system due to its superior properties. Finally, the spiral spring 65 to be used offers a very favorable preload setting option and thus an adaptation of the hoist to different transport weights.

A spiral roller drive is described by way of example according to FIGS. 5 and 6. In between the angles of the back and Side walls 11, 12, 14 and screwed to the rear wall 14, inserted, right-angled profiled rack 60 engages One pinion 61 each. They are connected to a shaft 62. The shaft 62 is mounted in two bearing blocks. The bearing blocks 69 are attached below the lowering table base plate 22. In addition to one of the pinions 61, the spiral roller 63 is also torsionally securely mounted on shaft 62. When the lowering table is raised, the end of a rope 67 lies on the smallest radius of the Spiral roller 63 and winds up according to the shaft immersion depth and thus with washing spring tension on the spiral windings on. The rope runs off the rope drum 66.

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The latter is arranged on the spatially parallel to the pinion shaft 62 Shaft 64 mounted so that it cannot twist. The shaft 64 is also between two bearing blocks 69 below the lowering table base plate 22 'stored. The spiral spring 65 is also threaded between the bearing blocks 69. It is on threaded sockets at both ends 68 screwed on, one of which is anchored on the shaft 64 and the other is mounted so that it can be easily rotated, but on the bearing block 69 is tied up. For this purpose, a pin 29 penetrates both the threaded sleeve 68 in an axial bore also the adjacent bearing block 69 .. With rotation of the shaft 64, the spiral spring 65 is tensioned or relaxed depending on the direction of rotation. The drive of the shaft 64 takes place via the cable 67 through the shaft 62 and thus the spiral roller 63 the increasing or decreasing spring force on the cable drum 66 caused by the inversely variable torque Radii of the spiral roller 63 balanced so that on the shaft 62 and thus the same force is always effective at the pinion circumference 61. But so that this also takes account of the respective load on the Lower table 2 corresponds, the threaded sleeve 68 rotatable on the shaft 64 is used as an adjusting element of the spiral spring preload used. For this purpose, there are optionally many holes for receiving on the same pitch circle of the threaded sleeve 68 of the locking pin 29 is provided.

The lowering table movement is thus due to the action of the spiral roller operation 63 at least low in mass and the rolling of the pinion 61 in the racks 60 is stacked in motion. This activity but only by arranging an exact guidance of the elevator-like Movement of lowering table 2 possible. This is done by a spatial parallel guidance of guide sleeves 23 over the guide rods 6. These are at least two round rods that are tapered at both ends in the angle 28 welded to the side part mounting rails 17 and on the underside in the one on the central strut 95 of the base frame 16, screwed on lying sockets 94

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are consolidated.

The use of a spiral drive allows all attachments to be housed in a protected place in cabinet 1. Since there are no functional parts below the cabinet floor 15 except for the castors 9 If more need to be installed, this can be laid deeper and thus more space can be gained for the drive-in shaft. The base frame is formed here only from miter-welded flat bars, that for corner reinforcement and swivel castors 9 the corner flanges 90 are formed. The central brace 95 is provided as a sleeve support 94 and as a central reinforcement. The frame 16 is covered again with the floor panel 15.

The lowering table is attached to the guide bars by means of the guide sleeves 23 6 led. It is preferably a ball bearing sleeve or sintered or plastic bushings. They are fastened in the lowering table base plate 22. Because the accuracy of the guide depends not only on the fit of the bushings and rods but also on the height of the guide sleeves 23, may not be saved here.

The different transport weights that come with the lowering table are to be lifted, set the option of setting the coil spring force in advance. It is a matter of determining the preload when the lowering table is raised. It happens as it did before mentioned, by turning the threaded sleeve 68, which is loosely mounted on the shaft 64, because the spring force can be applied without time-consuming attempts can hardly be precisely aligned with the transport weight, it is generally overdosed. A correction option is allowed a necessary compensation. By means of the adjusting screw 92 in at least one of the bearing blocks 69, the rotation of the Shaft 64 braked. The braking effect is achieved by the pressure of a cylindrical, axial hard rubber or plastic core 93 Reinforced in screw shank 92.

The use of the different drive or drive units that can be used

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Claims (22)

-yr- NACHC " Property rights ^! Photo and video library as a rollable cabinet with a retractable one Mounting shelf for projection devices and others, characterized in that a lowering table (2) electrically or manually by means of a screw spindle stroke, cable pull, Rack and pinion drive or the like from the rear part of a The shaft (107) assigned to the cabinet (1) can be opened by the elevator, the shaft (10) by means of a displaceable The table top (3) can be covered and the cabinet (1) can be locked by means of a shelf-like door box (4) is. 2. Photo and video library according to claim 1 and characterized in that that the lowering table (2) as a front and rear open, vertical rectangular box is provided in a height corresponding to approximately half the shaft depth. 3. Photo and video library according to claim 1 and 2, characterized in that that the cylinder lock (7) provided in a door box (4) at the end of an axial extension Rotary latches (70, 71) are integrally formed, which when the photo and video library is closed in a respectively assigned groove (31, 40) of the table top 3) and the neighboring door case (4). 4. Photo and video library according to claim 1 and following, characterized in that the modular system from the side panels (11, 12), the rear wall (14) and the base (15) are assembled by means of mutually associated folds (13) or frames (16) and screwed the cabinet (1) to the table top (3) by means of guide rods (30) in associated mounting rails (17), preferably square tubes, of the side part 030022/0192 ~ ¹⁷ ~ ORIGINAL INSPECTED • w- Ie (11, 12) pushed on and the door box (4) by means of
Hinge straps (42) hinged to molded folds (18)
are. 5. Photo and video library according to claim 1 and following, characterized in that the guide rods (30) by spacers (32) are arranged at a distance from the table top (3) which is slightly larger than the wall thickness of the Guide rods (30) telescopically receiving mounting rails (17) or square tubes, the spacer diameter slightly smaller than the matched groove width (19) of the mounting rails (17) and the groove length (19) corresponds to the depth of the table top (3). 6. Photo and video library according to claim 1 and following, characterized in that on the associated corner flanges (90) = the rectangular base frame (16) and under each door box bottom (4) castors (9) are screwed
and the door box rollers are as far away from the hinge as possible. 7. Photo and video library according to claim 1 and following, characterized in that the door box (4) as box-like inwardly open containers with shelf-like, arbitrarily adjustable intermediate floors (43) are provided. 8. Photo and video library according to claim 1 and following, characterized in that in the door box (4) the vertical, double-U-shaped folding columns (44) arranged on both sides through the front, the column rebates (44) at right angles at the bottom and at the top covering front panel (46)
are connected to each other. 9. photo and video library .After claim 1 and following, characterized in that in the inner flanges projecting freely 030022/0192 " ¹⁸ ~ -VS- (45) the double U-FaI zsäul-en (44) the door box (4) corresponding, Optionally, many perforations (47) to accommodate commercially known and the intermediate floor as a support Serving clamping brackets are provided. 10. Photo and video library according to claim 1 and following, characterized in that at least 3, preferably by means of Chain drive rotation-synchronized threaded spindle (5 ') act in assigned nuts of the lowering table base plate (22) and with associated tapers (51) above in the, the receiving rails (17) of the side parts (11, 12) molded flat rails (52) and mounted on the underside in each of the base frames (16) of the cabinet floor (15) hinged and in a housing (50) egg ncjopassten axial deep groove ball bearings are supported. 11. Photo and video library according to claim 1 and following, characterized in that the threaded spindle tapers (51) break through the axial groove ball bearing housing (50) and each end with a chain wheel (53) are reinforced. 12. Photo and. Video library according to Claim 1 and the following, characterized characterized in that the tension roller (54) with the offset threaded bolt over the associated elongated hole (55) of the under the central strut of the base frame (16) arranged bridge web (56) is clamped. 13. Photo and video library according to claim 1 and following, characterized in that the threaded spindle drive (5) preferably Electromotive and thereby by engagement of a sprocket in the chain drive (53) or manually by Crank (59) and bevel gear drive (58) takes place, the latter with a housing below a side wall rail (17) provided and the crank (59) to the cabinet side part (11) is kept foldable. 030 0 22/0192 -19- 14. Photo and video library according to claim 1 to 10, characterized in that that in the guide sleeves (23) arranged on both sides of the lowering table base plate (22) preferably Ball bearing sleeves, at least two on the cabinet floor (15) and the side part mounting rails (17) Guide rods (6) are guided. 15. Photo and video library according to claim 1 to 10 and 14, characterized characterized in that one on both sides and below the lowering table base plate (22), one on the side parts (11, 12) screwed provided toothed racks (60) assigned pinion (61) is mounted, the pinion (61) are axially connected and a spiral roller (63) is provided on the same shaft (62). 16. Photo and video library according to claim 1 to 10, 14 and following, characterized in that a second below the lower table bottom 15 provided shaft (64) a cylindrical spiral spring (65) and a cable drum (66) are arranged, and a cable pull (67), preferably a wire rope with a nylon core, which are spatially parallel Cable drum (66) and spiral pulley (63 connects. 17. Photo and video library according to claim 1 to 10, 14 and following, characterized in that the coil spring ends (65) screwed onto assigned threaded sleeves (68), one of which is mounted on the shaft (64) so that it can be easily rotated and easily releasably tied to the bearing block (69) and the other threaded sleeve (68) is rigidly connected to the shaft (64). 18. Photo and video library according to claim 1 to 10, 14 and following, characterized in that at the highest lowering table -20-020022 / 0192 position (22) a sufficient reserve of rope on the rope drum (66) is wound up and the rope (67) runs onto the outermost spiral roller diameter (63). 19. Photo and video library according to claims 1 to 10, 14 and following, characterized in that by turning the threaded sleeve (68) locked on the bearing block (69) a Bias of the spiral spring (65) is generated, which is approximately the weight of the lowering table at the highest opening position (2) plus burden equals. 20. Photo and video library according to claim 1 to 10, 14 and following, characterized in that one in at least one of the bearing blocks (69) arranged adjusting screw (92) with an axial plastic protruding over the top of the shaft or hard rubber core (93) protrudes against the shaft (64). 21. Photo and video library according to claim 1 and following, characterized in that the horizontal flange of the right angle profiled handle (33) as a spacer of the guide rods (30) from the table top (3) and as Stop the latter against the cabinet (1) is arranged. 22. Photo and video library according to claim 1 and following, characterized in that the lowering table side walls (21) taper towards the base plate (22) but only the rear edge of the side wall is inclined and between the front edges of the side wall A bar (24, 25) is provided at about a third of the height on the rear edge of the base plate. 030022/0192