WO2000033702A1

WO2000033702A1 - Telescopic platform (drive)

Info

Publication number: WO2000033702A1
Application number: PCT/DE1999/003884
Authority: WO
Original assignee: H & M Sitz-Systeme Gmbh
Priority date: 1998-12-04
Filing date: 1999-12-03
Publication date: 2000-06-15
Also published as: DE59907317D1; EP1005811A1; ATE251406T1; DE19856222A1; EP1128749B1; EP1128749A1

Abstract

The invention relates to a telescopic platform with rows of seats (1 to 4) which are arranged in several tiers that can be telescoped. Each tier is provided with a linear drive unit (18) for the rows of seats (1 to 4) to prevent slip.

Description

Title: Telescopic grandstand (drive)

description

The invention relates to a telescopic grandstand with rows of seats arranged in several floors which can be extended in a telescopic manner.

In known telescopic stands, the rows of seats can be extended using a friction wheel drive. The travel movements are transmitted via rubber-coated rollers by appropriate ground pressure. The rollers are driven by a gear motor. Usually, several such drive elements are installed in a telescopic grandstand block. The number depends on the length and size of the grandstand.

It is also known to enable the rows of seats to be extended with the aid of a caterpillar drive. The travel movements are transmitted via rubber-coated caterpillars, similar to a tank, by appropriate ground pressure. The caterpillars are driven by a gear motor.

The known disadvantages occur in the known telescopic stands with friction wheel or caterpillar drive. As a result of slippage, it may during the extension ^'of the rows of seats to a tilting of individual elements of TeleskoDtribüne come. Besides, will the slip makes it difficult to extend the individual rows of seats exactly in parallel. As a result, it is almost impossible to achieve exact end positions without additional positioning aids. Individual rows of seats can usually only be controlled via external locks.

In addition, telescopic stands are known in which the extension of the individual rows of seats is achieved with the aid of a cable drive. The extension movements are carried out via pull ropes with appropriate deflections and a motor-driven rope drum. Due to different rope stretches, it is almost impossible to ensure that the rows of seats are extended exactly. As a result, no exact end positions can be achieved without the use of additional end sections. In addition, the cable drive is very maintenance-intensive. Any control of the rows of seats is only possible via external locks.

Hydraulic or pneumatic drives can also be used to extend the individual rows of seats. With hydraulic drives, double-acting push and pressure cylinders can be used to implement the extending and retracting movement of the rows of seats. Pneumatic drives can use single-acting cylinders that are coupled with a cable retraction drive. A hydraulic or pneumatic drive is relatively complex and expensive to install. In addition, problems with parallel operation arise when using several cylinders in a row of seats. A limit switch can only be realized with the help of mechanical limit switches. In addition, the hydraulic and pneumatic drives are very maintenance-intensive. Any control of individual rows of seats is only possible via external locks.

The object of the invention is to provide a telescopic grandstand which overcomes the disadvantages mentioned above. In particular, the occurrence of slippage should be prevented. In addition, individual rows of seats should be controllable as desired. In addition, the telescopic grandstand according to the invention should be easy to use and inexpensive to maintain. The object is achieved in a telescopic grandstand with rows of seats arranged in several floors, which can be extended telescopically, in that at least one linear drive is provided for the rows of seats on each floor. This makes it possible to control and move each row of seats as required. As a rule, permanent magnet motors are used, the thrust speed of which is independent of the load. The drives are protected against thermal overload during operation. The linear drives used work under tension and pressure. The use of the linear drives ensures exact positioning of the individual rows of seats.

A special embodiment of the invention is characterized in that at least two linear drives are provided for the rows of seats on each floor. The extension and retraction movements are stabilized by using two linear drives. There is a kind of self-guidance. However, additional guidance facilities may be required. At least two linear actuators each. ensure that a row of seats in the telescopic grandstand can be moved evenly without tilting or skewing.

Another special embodiment of the invention is characterized in that the linear drives are equipped with a current-dependent limit switch. Such a hysteresis-dependent switching off of the inward and outward movement of the linear drives provides the advantage that additional mechanical limit switches can be dispensed with. This means that an automatic locking in the end position is guaranteed.

Another special embodiment of the invention is characterized in that a voltage source with 12 or 24 volts is used to supply energy to the linear drives. This prevents injuries if someone accidentally comes into contact with live parts of the telescopic grandstand. A further special embodiment of the invention is characterized in that the energy supply takes place via rechargeable batteries. The use of the batteries is particularly advantageous if there is no stationary supply source available during the installation and operation of the telescopic grandstand. This also eliminates the need for live cables within the telescopic grandstand.

A further special embodiment of the invention is characterized in that the linear operations are controlled via a mobile control unit. The mobile control unit can be stored separately as long as the telescopic grandstand is not required. This prevents improper confirmation of the retracted or extended telescopic grandstand.

Another special embodiment of the invention is characterized in that the energy supply is integrated in the control unit. E.g. the power supply and the control unit can be accommodated in a portable case. This is particularly practical when the telescopic grandstand is to be used outdoors.

Another special embodiment of the invention is characterized in that the linear drives are equipped with a worm gear with self-locking. This ensures that the retracted or extended rows of seats are automatically locked in their end positions.

A further special embodiment of the invention is characterized in that the linear drives are detachably attached to the extendable rows of seats with the aid of fastening devices, the fastening devices being operable from the outside when the rows of seats are retracted. This ensures that the drives are easily released in the event of a fault: A further special embodiment of the invention is characterized in that the fastening devices are formed by threaded sleeves, which are fastened on the inside to the rows of seats and which serve to receive screws, the heads of which are accessible from the outside. On the one hand, the screws ensure that the linear drives are released. On the other hand, the screws allow the distance between the respective linear drive and the associated row of seats to be adjusted in order to compensate for installation tolerances.

Another special embodiment of the invention is characterized in that the linear drives are positioned with the aid of drivers. The stroke of the linear drives corresponds to the extension or entry depth of the rows of seats. The drivers are coupled to the linear drives and ensure that additional rows of seats are moved when a row of seats is extended and retracted. This considerably simplifies the control effort.

Further advantages, features and details of the invention result from the following description, in which an embodiment of the invention is described in detail with reference to the drawing. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. The drawing shows:

Figure 1 • the view of a section through an inventive

Telescopic grandstand in the extended state along the line l-l in Figure 5;

Figure 2 is an enlarged view of one of the linear drives shown in Figure 1;

Figure 3 shows the telescopic grandstand from Figure 1 in the partially approached state; FIG. 4 shows an enlarged detail from FIG. 1 or

Figure 3; and

Figure 5 is a plan view of the telescopic grandstand shown in Figures 1 and 3 without seats and without walkways.

The telescopic grandstand shown in Figure 1 has four rows of seats 1, 2, 3 and 4. The rows of seats 1 to 4 are in the extended state. Each of the rows of seats I to 4 has a seat 5, which is followed by a vertical seat cover 6. A walkway 7 is formed between the seat surfaces 5 of the rows of seats 1 to 4.

A connecting element 8 is fastened to the inside of the seat lining 6, as can best be seen in FIG. A nut 9 is rotatable in the connecting element 8. The nut 9 is equipped with an internal thread. A screw 10 extends through the nut 9. The head 11 of the screw 10 is accessible from the outside of the seat cover 6. The mother is either self-locking or equipped with a safety device. This ensures that the nut rotates together with the screw in the installed state and axially fixes the screw.

At the free end of the screw 10, a connector 12 is fixed with an internal thread. Turning the screw 10 causes the distance between the seat cover 6 and the connecting part 12 to change. This allows tolerances to be compensated for during installation. In addition, the screw 10 can also be completely unscrewed from the connecting part 12.

The connecting part 10 is mounted with the aid of a pin 14 on a hinge eye 15 of a push rod 16. The push rod 16 is guided in a guide tube 17 which belongs to a linear drive 18. The linear drive 18 is fastened to a driving crossbar 21 by a further joint eye 19. In the plan view shown in Figure 5 it can be seen that the center rτ _. ertraverse 21 has the shape of a U, the legs of which are angled at the ends 22 and 23 by -go °. The ends 22 and 23 of the driving crossbar 21 are fastened to supports 24 and 25 of the next row of seats.

As can be seen in FIGS. 1 and 3, the supports 24 are fastened to carriages 26. The carriages 26 can be moved onto the floor 28 with the aid of rollers 27. In Figure 1, the rows of seats 1 to 4 are in the extended state. In this state, the supports 24 provide support for the rows of seats 1 to 4. In FIG. 3, the rows of seats 1 and 2 are in the retracted state. That is, the push rods 16 are arranged inside the guide tubes 17. The extended position of the rows of seats 1 and 2 is indicated by contour lines 29 and 30. The retraction of the row of seats 3 would, as a result of the coupling via the crossbars 21, result in the rows of seats 1 and 2 being retracted together with the row of seats 3 by the linear drive belonging to the row of seats 3.

As previously mentioned, the adjustment of the screw 10 serves to accommodate installation tolerances. In the event of a malfunction when the telescopic grandstand is retracted, the connecting part 12 is removed from the thread of the screw 10 by unscrewing the screw 10 in the direction of the arrow 13. This removes the row of seats from the associated linear actuator. Then the row of seats can be moved manually. In this case, a holding plate 32 supports the linear drive 18 from tipping over. A top view of the holding plate 32 is shown in FIG. 4. The holding plate 32 is attached to a cross member 31.

Claims

claims

1. Telescopic _grandstand with rows of seats arranged in several floors (- _| t> _{js 4} \ _{dje can be extended} telescopically, characterized in that at least one linear drive (18) is provided for the rows of seats (1 to 4) on _each floor \ _{S [}

2. Telescopic stands according to the preamble of claim 1, characterized in that at least two linear drives (18) for the rows of seats (1 to 4) are provided in each floor.

3. Telescopic grandstands according to one of the preceding claims, characterized in that the linear drives (18) are equipped with a current-dependent limit switch.

4. Telescopic grandstand according to one of the preceding claims, characterized in that a voltage source with 12 or 24 volts is used to supply energy to the linear drives (18).

5. Telescopic grandstand according to claim 4, characterized in that the energy supply takes place via rechargeable batteries.

6. Telescopic grandstand according to one of the preceding claims, characterized in that the control of the linear drives (18) takes place via a mobile control unit.

7. Telescopic grandstand according to claim 6, characterized in that the energy supply is integrated in the control unit.

8. Telescopic grandstand according to one of the preceding claims, characterized in that the linear drives (18) are equipped with a worm gear with self-locking.

. Telescopic grandstand according to one of the preceding claims, characterized in that the linear drives (18) with the aid of

Fastening devices (8 to 12) are detachably attached to the extendable rows of seats (1 to 4), the fastening devices (8 to 12) being operable from the outside when the rows of seats are retracted.

10. Telescopic grandstand according to claim 9, characterized in that the fastening devices are formed by threaded sleeves (9) which are fastened to the inside of the rows of seats {1 to 4) and which serve to receive screws whose copy (11) is accessible from the outside .

1 1 _. Telescopic grandstand according to one of the preceding claims, characterized in that the linear drives (18) are positioned with the aid of drivers (21).