ES2398849T3 - Motorized telescopic grandstand - Google Patents

Abstract

Motorized telescopic grandstand provided, on the one hand, with a set of steps (1) staggered in height, each comprising at least one row of adjacent seats (2) mounted on a support frame (3), essentially vertical, mobile in translation along the ground, parallel to it and comprising a lower horizontal support beam (4) that preferably has a rectangular section, as well as vertical and / or oblique connecting cross members (5) and, on the other hand , motorized drive elements that allow it to move between a resting position in which the stands (1) are folded together and a position of use in which the stands (1) are deployed so that the rows of seats (2) are staggered and separated from each other, the motorized drive elements comprising a thrust chain (6) comprising, for one part, an active horizontal branch (7) extending perpendicular to the beams supports (4) of the support frames, and fixed at its free end to the supporting beam (4) equipped with the row of seats (2) of greater or lesser height, and, on the other hand, an inactive storage branch (8 ) comprising at least one vertical segment separated from the active branch by a curvilinear section at which the thrust chain (6) is driven and guided at least by a rotating pinion controlled by a geared motor, characterized in that said active horizontal section (7 ) extends to the top of said beams (4).

Description

Motorized telescopic grandstand

The present invention aims at a motorized telescopic grandstand intended, more specifically, to equip stadiums, or also sports halls or showrooms.

This type of platform is traditionally provided with a set of steps staggered in height and each comprising at least one row of adjacent seats (seats or bench seats) that is mounted on a support frame.

It happens that some stands are not used constantly and must be disassembled.

For this reason, mobile telescopic stands have already been proposed between a resting position, in which the stands fold together, in particular against a vertical wall, and a position of use, in which the stands are deployed in such a way that the rows of seats are staggered and separated from each other.

The stands of a telescopic grandstand of this type are mounted on a support frame, essentially vertical, movable in translation along the ground, parallel to it and comprising a lower horizontal supporting beam that preferably has a rectangular section , as well as vertical and / or oblique connecting crossbars.

The supporting beams of which the support frame of each of the stands is provided are stacked together in the rest position and are separated from each other in the use position.

The displacement of this type of telescopic platform between the rest position and the position of use is generally controlled by motorized drive elements that can be sophisticated, and therefore expensive, or whose configuration is very rudimentary which makes them Hard to handle and unreliable.

The present invention aims to solve this problem by proposing a motorized telescopic platform of the aforementioned type whose displacement between the rest position and the use position is controlled by particularly simple and economical motorized drive elements and, in addition, especially simple drive.

According to the invention, this type of telescopic grandstand is characterized in that it is provided with motorized drive elements comprising a thrust chain comprising, on the one hand, an active horizontal branch that extends perpendicularly to the supporting beams of the support frames, at the top of these beams, and, on the other hand, an inactive storage branch comprising at least one vertical segment separated from the active branch by a curvilinear section at the level of which the thrust chain is operated and is guided at least by a rotating pinion controlled by a gearmotor.

The active branch of the thrust chain is fixed at its free end to the supporting beam equipped with the row of seats of greater or lesser height, as a rule in the row of seats of lesser height, such that the stand equipped with the row of seats of greater height it can be placed against a vertical wall.

The inactive storage branch of the thrust chain is, in turn, housed in a receiving box within which it can be folded over itself to be stored in a small space.

It has already been proposed for many years to use thrust chains to drive different mechanical parts.

This type of thrust chains that are described, by way of example, in documents FR 1 297 285, FR 2 061 884 or FR 2 780 472 have a particular frame that allows them to transmit tensile forces not only in the manner of traditional chains, but also some pushing forces behaving in that case as rigid barriers in one piece.

These chains are classically formed by a succession of links articulated with each other by means of transversely directed axes.

Each link comprises two essentially parallel flanges, respectively crossed by receiving holes of the articulation axes, and each provided with an extension defining a front transverse active face and a rear transverse active face, intended to rest, respectively, against the rear and front transverse active faces of the flanges of the neighboring links when the chain section, of which the considered links are part, extends along a straight line.

This type of thrust chains are actuated at the level of the curvilinear section that separates the active branch from the storage branch by means of a driving pinion with an axis parallel to the articulation axes of the links, mounted inside a crankcase and on which Pick up the chain.

Free mounted bearing rollers allow you to guide the links of the thrust chain around the drive pinion.

US-A-3 178 154 discloses a telescopic platform comprising all the features of the preamble of claim 1.

In accordance with the invention, it has been the idea of adapting such push chains to the operation of telescopic stands.

The supporting beams of which the support frame of each of the stands of this type of stand is provided are preferably mounted on rolling rollers that allow easy movement along the ground between the rest position and the position. of use.

According to a preferred feature of the invention, the supporting beams of the support frames of the stands are provided on its upper face with guide skates of the active branch of the thrust chain, preferably of a synthetic material, which they support this chain and guide it laterally and vertically in a cyclic manner during its movement from the rest position to the use position.

According to another preferred feature of the invention, the active horizontal branch of the thrust chain is mounted on vertical rods that allow it to come into contact with the ground during its movement between the rest position and the use position.

In fact, the active branch of the thrust chain can have a length of several meters and the vertical rods can then compensate for its bending.

According to the invention, the vertical rods can also be advantageously equipped at their upper end with guide skates of the active branch of the thrust chain, preferably made of a synthetic material.

It should be noted that, according to the invention, the travel of the thrust chain is only limited by the configuration of the place or the premises in which the telescopic grandstand is installed, by the number of stands of this grandstand and by force of necessary thrust for its displacement.

On the other hand, it should be noted that in order to reduce the height necessary for the storage of the inactive storage branch of the push chain inside the receiving box, this branch can be advantageously folded over itself and subdivided into at least Three vertical branches.

The characteristics of the motorized telescopic grandstand constituting the object of the invention will be described in more detail with reference to the accompanying non-exclusive drawings, in which:

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Figure 1 is a perspective view of the rear face of a telescopic grandstand according to the invention; -Figure 2 is a perspective view representing the beams of the telescopic stand in the position

of use as well as the thrust chain; - Figure 3 represents the beams supporting the telescopic stand in the rest position; -Figure 4 is a detail representing the upper end of a vertical rod provided with a guide skate.

According to figure 1, the telescopic grandstand is provided with a set of steps 1 staggered in height and each comprising at least one row of adjacent seats 2.

Each of the stands 1 is mounted on a vertical support frame 3 that is mobile in translation along the ground, parallel to it.

The support frames 3 each comprise a lower horizontal supporting beam 4 having a rectangular section as well as a set of connecting cross members 5, vertical and oblique.

According to Figure 1, the telescopic stand is represented in its position of use, in which the stands 1 are deployed so that the rows of seats 2 are staggered and separated from each other.

A push chain 6 allows the telescopic platform to be displaced between its position of use, which is represented in Figure 1 and a rest position in which the stands 1 are folded together.

According to Figure 2, in the position of use, the support beams 4 of the support frame 3 of the different stands 1 are located separated from each other in parallel.

According to Figure 3, in the rest position, the supporting beams 4 of the support frame 3 of the different stands 1 are stacked together.

The bearing beams 4 are provided with rolling rollers 14 in such a way as to facilitate their movement on the ground between the rest position and the use position.

The thrust chain 6 is formed by a succession of links articulated with each other and shaped in such a way as to allow the transmission of tensile forces and thrust forces.

The concrete framework of this chain 6 is known in itself and will not be described in detail later in the present description.

According to Figures 1 and 2, the push chain 6 comprises an active horizontal branch 7 that extends perpendicular to the supporting beams 4 of the support frame 3 of each of the stands 1, at the top of these beams 4, as well as an inactive storage branch 8 folded on itself so that it forms three vertical branches and is collected inside a receiving box 9.

The active branch 7 and the inactive storage branch 8 of the thrust chain 6 are separated by a curvilinear section housed within a crankcase 10 fixed to the ground containing a driving and guide pinion not shown whose rotation is controlled by a gearmotor

According to FIG. 1, the active horizontal branch 7 of the thrust chain 6 is fixed to the supporting beam 4 of the support frame 3 of the lower tier I1 at its end located at the opposite side of the crankcase 10.

According to FIGS. 2 and 3, the active horizontal branch 7 of the thrust chain 6 is further inserted into guide skates 13 of a synthetic material fixed on the upper face of each of the bearing beams 4 of the support frames 3.

These guide skates are made in such a way that they support the thrust chain 6 and guide it laterally and vertically in a cyclic manner during its movement from the rest position to the use position.

According to Figures 1, 2 and 4, the active horizontal branch 7 of the thrust chain 6 is furthermore mounted on vertical rods 11 provided at its upper end with guide skates 12 of a synthetic material.

These vertical rods 11 have the function of preventing the thrust chain 6 from coming into contact with the ground.

According to Figure 1, the displacement of the active branch 7 of the thrust chain 6 according to the arrow A drives the displacement of the telescopic platform from the use position to the rest position.

In this displacement, the push chain 6 functions as a classic chain to transmit tensile forces.

The bearing beams 4 then contact each other successively.

The displacement of a bearing beam 4 thus progressively drives the displacement of the neighboring carrier beam 4 by the contact of these beams to the rest position shown in Figure 3 in which all the bearing beams 4 are stacked together.

From this rest position, the displacement of the active branch 7 of the thrust chain 6 in the reverse direction of the arrow A drives the displacement of the telescopic grandstand from the rest position towards the use position represented in the figures. 1 and 2.

In this displacement, the thrust chain 6 is supported and guided by the guide skates 13 of which the supporting beams 4 of the support frames 3 of the different stands 1 are provided and this then functions as a rigid bar to exercise a pushing force on these beams 4 in such a way as to move them to the position of use shown in Figure 2 in which they are located apart from each other.

Nomenclature

one

Steps

2

Seating

3

Support frame

4

Bearing beams

5

Union crossbars

6

Thrust chain

7

Active horizontal branch

8

Inactive Storage Branch

9

Reception box

10

 Sump

5

eleven  Vertical rods

12

Guide skates

13

Guide skates

14

 Bearing rollers

Claims (6)

1. Motorized telescopic grandstand provided, on the one hand, with a set of steps (1) staggered in height, each comprising at least one row of adjacent seats (2) mounted on a support frame (3), essentially vertical, mobile in translation along the ground, parallel to it and comprising a lower horizontal support beam (4) that preferably has a rectangular section, as well as vertical and / or oblique connecting crossbars (5) and, on the other hand, motorized drive elements that allow it to move between a resting position in which the stands (1) are folded together and a position of use in which the stands (1) are deployed in such a way that the rows of seats (2) are staggered and separated from each other, the motorized drive elements comprising a thrust chain (6) comprising, on the one hand, an active horizontal branch (7) that extends perpendicularly to the supporting beams (4) of the support frames, and fixed at its free end to the supporting beam (4) equipped with the row of seats (2) of greater or lesser height, and, on the other hand, a branch of inactive storage (8) comprising at least one vertical segment separated from the active branch by a curvilinear section at the level of which the thrust chain (6) is driven and guided at least by a rotating pinion controlled by a geared motor, characterized because said active horizontal section (7) extends to the top of said beams (4). 2. Telescopic grandstand according to claim 1, characterized because The bearing beams (4) are mounted on rolling rollers (14) that facilitate their movement along the ground between the rest position and the use position. 3. Telescopic grandstand according to any one of claims 1 and 2, characterized because the supporting beams (4) of the support frames (3) of the stands (1) are provided, on their upper face, with guide skates (13) of the thrust chain (6), preferably of a material synthetic, which support this chain and guide it laterally and vertically in a cyclic manner during its movement from the rest position to the position of use. 4. Telescopic grandstand according to any one of claims 1 to 3, characterized because The active horizontal branch (7) of the thrust chain (6) is mounted on vertical rods (11) that allow it to come into contact with the ground during its movement between the rest position and the use position. 5. Telescopic grandstand according to claim 4, characterized because The vertical rods (11) are provided at their upper end with guide skates (12) of the active branch (7) of the push chain (6) preferably made of a synthetic material. 6. Telescopic grandstand according to any one of claims 1 to 5, characterized because The inactive storage branch (8) of the thrust chain is folded on itself and subdivided into at least three vertical branches.