JP3544663B2 - Adjustable tilt telescopic stand and retractable seat - Google Patents

Description

(A) Industrial application field The present invention relates to a stand provided in a multipurpose hall, a theater or the like.
(B) Conventional technology Telescoping stands with or without seats are extremely widely used in sports or cultural stadiums and public halls. Such telescoping stands can be used as a stand for accommodating the public or as an expanded horizontal floor surface due to the small storage volume.
However, telescoping stands have significant disadvantages. That is, the outer shape of the telescopic stand cannot be changed. In other words, the height of each step selected at the time of construction cannot be changed, and the outer shape of the step layer is fixed.
In buildings called "multipurpose halls," it is necessary to change the profile of the steps as desired.
Moving floor systems which are housed on the ground and are freed vertically to a graduated height in the position of use are already known and can respond to the need to change the profile of the steps. However, when technical pits cannot be formed on the ground, the telescopic stand solution, which is deployed horizontally by moving on the ground, is the only useful solution.
(C) Problems to be Solved by the Invention The present invention improves the state of manufacture and development of such telescoping stands in order to respond to visibility-related conditions which allow for variations in the layers of the steps. It is intended to be.
(2) Means for Solving the Problems In order to achieve this object, the present invention provides a nested stand of the type having a plurality of steps with stepped heights, The steps can be moved between a storage non-use position where the steps are overlapped and housed in the same vertical plane, and a use position where the steps are expanded and the steps are formed in a stair form, and each step can be moved to the storage position and expanded. A lower base for moving the step to and from a position, the base having two legs 31, 31 having moving means 30, 30 abutting a mounting surface 33, and two symmetrical sides. The solids 32, 32, wherein the legs 31, 31 and the solids 32, 32 are laterally offset from each other so as to enable juxtaposition in the storage position of the stage assembly. Each stage comprises a horizontal chassis 19 resting on the base, the chassis 19 comprising: The caisson 10 is supported via a pair of indirectly joined X-shaped arms 11, 11 'which can be angularly moved under the action of the rod 5, and the height of the caisson 10 can be adjusted with respect to the chassis 19. In a telescopic stand, a movable device for ensuring the initial lifting of the arms from a rest position in which each arm 11, 11 'is arranged on an axis substantially parallel to the direction of the rod causing the angular movement. The movable device 12 has a slot 14 opened along the length of the rod 5, and can move along the rod 5 on a chassis 19 by a driving force from the rod 5. One end of the device main body 40 is rotatably supported at a distal end side of the device main body 40 with respect to the center of the step, and the other end is remote from the center of the step of one arm 11 ′. Position end or below caisson 10 A lifting lever 15 that can abut on a portion, one end of which is rotatably supported by the lifting lever 15 and the other end of which is rotatable to a distal end of the other arm 11 with respect to the center of the step. A small rod 16 disposed so as to be able to slide in the slot 14 while being supported by the arm 11.The movable device 12 is fixed to one end 11a of the arm 11, 14, two end positions, i.e., a position 14a for supporting the first pin at the proximal end to the center of the step of the slot 14 corresponding to the substantially horizontal rest position of the arms 11, 11 '; After the lifting period, the arms 11, 11 'are slid between the distal end of the pin 13 corresponding to the direct drive position from the rod 5 and the position 14b supporting the first pin. It has a first pin 13 mounted, and the lifting lever 15 has one end The small rod 16 is rotatably fixed to the device 12 by a pin 21, and the small rod 16 is rotatably supported on the one end 11 a of the one arm 11 by the first pin 13. The small rod 16 is rotatably joined to the lifting lever 15 via a fixing pin 16a. As a result, the small rod 16 is moved toward the center of the step of the end 11a of the arm 11 by the operation of the small rod 16. The linear movement of the movable device 12 causes an angular displacement of the lifting lever 15 by the actuation of the small rod 16 rotatably fixed to the end 11a of the arm 11, and then, in the rest position, the lifting lever The free end 15a of the arm 15 'comes into contact with the end 11b of the arm 11' supporting the caisson 10, and the arm 11 'is driven upward by the angular thrust of the lifting lever 15, so that the angle of the arm 11, 11' is increased. Raise the rod 5 The pin 13 is moved to the distal end 14b of the slot 14 by the horizontal movement of the movable device 12 toward the center of the step by the action, so that the pin 13 is rotatably supported by the caisson 10 via the lifting lever 15. The ends 11b, 11'b of the arms 11, 11 'are characterized in that the caisson 10 is raised.
The invention will be better understood from the following detailed description, which is given in connection with a non-limiting example of an embodiment of a stand according to the invention, with reference to the accompanying drawings, in which: FIG.
(E) Embodiment Referring to FIGS. 1 to 9, the stand is composed of a plurality of steps formed so as to be nested by moving linearly in a horizontal direction on the ground. .
Each step has a horizontal chassis 1 resting on the base at a different constant height for each step, the base comprising two lateral legs 31, 31 with wheels 30 and two straight legs. The common storage in which the two side legs 31, 31 and the straight bodies 32, 32 are arranged symmetrically in each step, the steps are overlapped, and the legs and the straight body are juxtaposed. The steps are offset to allow storage of the steps in space, and for this purpose the steps are arranged to protrude above the solids 32, 32 (see FIG. 4).
The chassis is preferably composed of two parallel profiles, each forming a longitudinal beam 1a, 1b joined by a crosspiece, especially at the ends (see FIGS. 6, 7d). .
Such telescopic stands are known and are described in particular in U.S. Pat. No. 4,041,655.
The steps, which are arranged at a fixed, non-variable height, each support a caisson whose height can be changed by means of a floor-forming lift, which will be described later.
Since each step is arranged on independent lifting means, the height of the caisson and the floor can be varied as desired. For this purpose, the caisson 2 and the chassis 1 are connected by a system of arms forming a connecting rod 3 in connection with a strut 4 and a thrust or pull supplied by known means 6 such as a motor. A joint system that is moved by force is formed with the horizontal rod 5. The caisson 2 moves in the vertical direction with respect to the chassis 1 by the action of the motor that drives the movable rod 5.
The mechanism for raising the movable rod 5 with respect to the step 1 is in particular of the type described in patent FR 74852 and US Pat. No. 5,287,804.
The stand according to the invention provides in a novel way the development and storage of a telescoping stand free from the ground and the formation of a layer of variable steps which can be adapted to the function of each type of installed hall. It combines the possibility of adjusting the height of the step to achieve this.
FIG. 1 shows the telescopic stand in a folded state, and it can be seen that the caisson 2 supporting the seat 6 rests on the chassis 1. FIG. 2 shows the telescopic stand in the unfolded state and in the maximum tilted state, the stand corresponding to each layer in the storage position, ie each caisson 2 rests directly on the chassis 1. ing. The seat 6 is in the disengaged position.
FIG. 3 shows a change in the outer shape with respect to FIG. The caisson 2 rests on the chassis 1 via the connecting rod 3 and the strut 4.
FIG. 4 shows a plan view of the telescopic stand in a folded state, and FIG. 5 shows a plan view of the telescopic stand in an unfolded state. FIG. 6 is a cross-sectional view of the "caisson and step" assembly in two different caisson positions (i.e., the dashed line is at the low position and the solid line is at the high position).
FIG. 7 shows the chassis 1 from various directions, of which FIG. 7A is a plan view, FIG. 7B is a front view, FIG. 7C is a longitudinal section, and 7D is a transverse section. . FIG. 8 shows the ascending system from various directions, of which FIG. 8A is a plan view, FIG. 8B is a front view in a raised position, and FIG. 8C is a front view in a lowered position.
Preferably, the remote-controlled motor 9 drives a rod system constituted by two lateral rods 5, which act on the legs of the arm 3 forming the connecting rod, It is moved to slide against the rotating means on the upper surface of the chassis 1.
Combined with the reaction of a strut 4 articulated at one end at the base of the chassis and articulated at the other end at the center of the arm, this movement causes the apex of each arm articulated to the upper caisson to move vertically To raise. Thus, it is raised and lowered according to the movement of the side rod 5.
FIG. 9 shows a modified example of the chassis 1, the caisson 2, and the seat 6. In this variant, the seat 6 fixed to the articulated board 7 is stowed due to the formation of a floor divided into two parts formed by the pivoting boards 7, 8 for taking out and storing the seat 6 Is done.
In this figure, the caisson 2 is shown in dashed lines in the low position leaning on the chassis 1 and in solid lines in the high position, the boards (7 and 8) and the seats are shown in dashed lines in the seat storage and folding position. , And the movement of the arrangement at the use position of the seat is indicated by a solid line.
In FIG. 9, the caisson 2 functioning as a floor comprises two pivoting boards 7, 8 having the same horizontal plane and extending parallel to the caisson 2 longitudinal axis. , 8 whose both edges are joined to the caisson 2 and which can be opened upward to free the seat 6 fixed in the lower position, one of the boards 7, 8 With the 6 lifted to the use position, it remains in the vertical position, and the other 8 of the boards is returned to the horizontal position that constitutes the step floor of the step.
In the embodiment shown in FIGS. 10 to 13, the steps making up the stand according to the invention are shown, wherein the caisson 10 is assembled at a common joint in a substantially central part to form a deformable X It is mounted on a known type of lifting system constituted by two arms 11, 11 '.
This assembly rests on a chassis 19 corresponding to the tier chassis. The lifting assembly is shown in the lower storage position in FIG. 10, and in FIGS. 11 and 12 the continuous part of the caisson 10 which is always kept parallel during the upward movement. The movement of the caisson is obtained by an angular movement of the two arms 11, 11 'of X-shape, in a manner known per se.
10 to 13 are side views of a lifting device showing a pair of X-shaped two arms 11, 11 ', and in many cases the caisson 10 comprises at least two sets of two arms 11, 11'. ′, So that the sides of boards 7, 8 are identical (mirror image) on the opposite side of FIG. 10 and FIG. 10 to operate and assist the initial lifting. Will be shown on the opposite side of the two X-arms.
As shown, the arm 11 'is joined at one end 11'a by a pin 18 fixed to a chassis 19. The other end 11'b of the arm 11 'supports the caisson 10 via rotating means such as a roller.
The arm 11, which is symmetrical to the arm 11 ', is fixed at one end 11a to a movable device 12 which can move along an axis parallel to the plane containing the two arms 11, 11'. The movable device 12 rests on the chassis 19 and moves relative to the chassis 19 via means for facilitating movement, such as roller bearings, sliders and the like.
The movable system can be replaced by any suitable mechanical means as shown in FIGS. 8A and 8B. 8A and 8B, a screw 9a driven and rotated by the motor 9 is provided, and a nut 9b is attached to the screw 9a. When the screw 9a rotates, the nut 9b moves to drive the side rod 5 acting on the movable device 12. In this case, one motor 9 which is arranged at an intermediate position between the two sets of X-shaped arms 11, 11 'and rotates the screw parallel to the base and at a small distance from the base, comprises two sets of X-shaped arms 11, 11'. It makes it possible to act on the two mobiles 12, 12 associated with each of the arms 11, 11 '.
The other ends 11b of the arms 11, 11 'are rotatably attached to fixing pins of the caisson 10. In this way, the movement of the mobile device in the direction of arrow F is caused, the two arms perform scissors movement, the end 11'b of the arm 11 'moves under the caisson 10, and at the same time, The end 11a of the arm 11 moves on the chassis 19.
In order to function efficiently from the first movement, the system is positioned such that the two arms 11, 11 'are substantially parallel to each other and parallel to the plane of the chassis 19 as shown in FIG. It is assumed that the lowering of the two arms 11, 11 'is avoided. In such a position, the arms 11, 11 'are no longer directly moved by the centripetal pulling force exerted on the mobile device 12 in the direction of arrow F, the two arms 11, 11' being subjected to the thrust of the mobile device 12. They are in contact with each other by a central joint located substantially in the plane. In this way, the force exerted along the arm 11 on the pin 22 joining the movable device 12 and the two arms 11, 11 'together, ie the vertical component of this tilting force, is Is too small for its horizontal component to move.
Thus, the development of this system for raising the caisson 10 operated by the X-shaped arms 11, 11 'continues according to its need to be imposed on the assembly in a compact rest position, ie a minimum height. .
However, in an application to a telescopic stand having a liftable caisson 10 according to the present invention, the assembly formed by the caisson 10 and its operating mechanism may be used during a period of non-use with minimal space requirements for storing and storing the step assembly. Preferably, it can be accommodated under
The invention makes it possible to change the height and obtain a compact rest position of the caisson 10, i.e. the positioning of the two arms 11, 11 'in substantially the same plane, which is close to the plane of the chassis 1, 19, whereby It is intended to enable the production of steps with minimal space requirements, ie with an “extra flat” caisson with seats.
To this end, according to the invention, the mechanism for raising the caisson 10 relative to the chassis 19 comprises a device for assisting the initial lifting of the arms 11, 11 'and thus avoiding the above-mentioned obstruction condition. ing.
This device for assisting lifting is formed by a lifting lever 15 pivotally mounted on the movable device 12 by a pivot pin 21. The free end 15a of the lifting lever 15 opposite to the pivot pin 21 is fixed to the lower side of the casing 10 or to the outside of the end 11'b of the arm 11 'supporting the caisson 10 via a roller. In order to facilitate the movement of the free end 15a under the support plate 17 or below the caisson, it is advantageous to provide a roller 23 at the end 15a.
FIG. 13 shows the support of the end of the lever 15 by the roller 23 on the support plate 17 fixed to the arm 11 ', and in FIGS. 11 and 12, the support is provided to the caisson 10 by the roller 23. Is done directly.
According to the present invention, the first pin 13 for attaching the end 11a of the arm to the mobile device is itself capable of moving within guide means provided on the system 12 in a direction parallel to the plane of the chassis 19.
Preferably, as shown, these guiding means are constituted by two slots 14 provided parallel to each other and parallel to the plane of movement of the arms 11, 11 '. Two slots 14, 14 aligned and symmetrically arranged on the two sides of the system 12 each receive one of the two ends of the first pin 13. In this manner, the first pin 13 moves the mobile device 12 between the two ends of the slot 14, namely, the proximal end 14a and the opposite distal end 14b to the step assembly.
The first pin 13 further supports the joining support of the small rod 16. The opposite end of the small rod 16 is rotatably joined to a lower third of the lever 15 at 16a, that is, the fixing pin 16a is supported by the support plate 17. It is closer to the end of the lever 15 joined to the movable device than the opposite end 15a or the lower surface of the caisson 10.
The device 12 for assisting lifting operates as follows. The starting movement for raising the caisson is effected by the action of a small rod 16 which causes an initial movement of the mobile device 12 in the direction of arrow F. That is, the first pin 13 moves to the inner end 14a of the mobile device 12 of the slot 14, so that the movement of the mobile device 12 does not act directly on the pin 13, and therefore on the arm 11.
On the other hand, the initial movement of the movable device 12 moves the rotation pin 21 on which the lever 15 does not slide in the direction of arrow F in the figure, but the fixed pin 16a of the lever on the small rod 16 has a substantially constant support. And the base of the small rod 16 is in contact with the pin 13.
The approach of the mobile device 12 in the center, i.e. in the direction of the arrow F, is, on the one hand, caused by the sliding of the pin 13 in the slot 14 (i.e. the pin 13 remains in a certain position and the slot 14 moves with the mobile device 12). On the other hand, this is achieved by the approach of the pin 21 supporting the base of the lever 15 towards the center of the mobile device 12.
Thus, the assembly of the lever 15 is tilted about the support point constituted by the pivot pin 16a, and the end 15a of the lever 15 moves angularly and abuts against the support plate 17 or the lower surface of the caisson 10. This allows the first pin 13 to pull the base 11a of the arm 11 directly inward of the chassis 19.
This involves moving the end 11'b of the arm 11 'upward and the initial lifting of the two arms 11, 11' until an angular position sufficient to obtain a position 14b in the slot 14 is obtained. Secure at the same time. In this end position of the pin 13, the subsequent movement of the mobile device 12 acts directly on the pin 13 and the arms 11, 11 'continue to move, exceeding the initial horizontal blocking position.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a stand in a folded or storage position. FIG. 2 is a cross-sectional view of the stand and seat in a deployed position showing a maximum incline (eg, a hockey incline). FIG. 3 is a cross-sectional view of the stand and seat in a deployed position showing a corrected tilt with respect to FIG. 2 (e.g., a basketball tilt). FIG. 4 is a plan view of the telescopic stand in the folded position. FIG. 5 is a plan view of the telescopic stand in the deployed position. FIG. 6 is a cross-sectional view of a step, showing two positions of the movable floor and the support of the seat. FIG. 7A is a plan view of a nested-stage chassis. FIG. 7B is a front view of the nested-stage chassis. FIG. 7C is a longitudinal sectional view of the nested-stage chassis. FIG. 7D is a cross-sectional view of the nested-stage chassis. FIG. 8A is a plan view of an assembly for raising a movable floor that abuts a nested-stage chassis. FIG. 8B is a longitudinal sectional view of the assembly for raising the movable floor in the raised position. FIG. 8C is a longitudinal sectional view of the assembly for raising the movable floor in the lowered position. FIG. 9 is a cross-sectional view of a step having a movable floor with a caisson for storing seats. FIG. 10 is a diagram of the initial lift device in a rest position in a preparation state. FIG. 11 is a view of the lift device in the operating position. FIG. 12 is a diagram of a lifting device with a step in a raised position. FIG. 13 is a detailed view of the lifting device.
DESCRIPTION OF SYMBOLS 1 Chassis 2 Caisson 3 Connecting rod 4 Strut 5 Side rod 6 Seat 7 Rotating board 8 Rotating board 9 Motor
9a screw
9b nut
10 caisson
11 arm
12 Mobile devices
13 First Pin
14 slots
14a position
14b position
15 Lift lever
15a Free end
16 Small rod
16a fixing pin
17 Support plate
18 pin
19 Chassis
21 Rotating pin
22 pin
23 rollers
30 Means of transport (wheels)
31 legs
32 lateral straight
33 Installation surface

Claims (1)

A nested stand of the type with a plurality of steps with stepped heights, wherein the plurality of steps are in a stowed non-use position where the steps are stacked and housed in the same vertical plane, and the steps are deployed Can be moved between the use position where the steps are formed in a stair form, each step has a lower base for moving the steps between the storage position and the deployed position,
The base is constituted by two legs 31, 31 having moving means 30, 30 abutting on the installation surface 33, and two symmetrical side vertical solids 32, 32, wherein the legs 31, 32 are provided. A horizontal chassis, wherein 31 and said uprights 32,32 are laterally offset from each other so as to enable juxtaposition in the storage position of the step assembly, each step resting on said base. 19,
The chassis 19 supports the caisson 10 through a pair of indirectly joined X-shaped arms 11, 11 'which are angularly movable under the action of the rod 5, and supports the caisson 10 with respect to the chassis 19. In the nested stand that can adjust the height,
A movable device 12 for ensuring an initial lifting of said arms from a rest position in which each arm 11, 11 'is arranged on an axis substantially parallel to the direction of said rod causing angular movement,
The movable device 12 has a slot 14 opened along the length direction of the rod 5, and a device main body 40 that can move on the chassis 19 along the rod 5 by a driving force from the rod 5. ,
One end is rotatably supported on the distal end side of the device main body 40 with respect to the center of the step, and the other end is the distal end of one arm 11 ′ with respect to the center of the step or A lifting lever 15 that can contact the lower surface of the caisson 10,
The slot 14 is rotatably supported at one end by the lifting lever 15 and rotatably supported by the other end of the other arm 11 at a distal end of the other arm 11 with respect to the center of the step. Having a small rod 16 arranged to be able to slide inside,
a) The mobile device 12 is fixed to one end 11a of the arm 11 and corresponds to the two end positions of the slot 14, namely the substantially horizontal rest positions of the arms 11, 11 '. A position 14a for supporting the first pin at the proximal end of the step relative to the center of the step 14 and a pin 13 corresponding to the position of direct drive of the arms 11, 11 'from the rod 5 after an initial lifting period. A first pin 13 slidably mounted at a distal end between a position 14b supporting the first pin;
b) the lifting lever 15 has one end fixed to the movable device 12 so as to be rotatable by a pin 21;
c) The small rod 16 is rotatably supported on the one end 11 a of the one arm 11 by the first pin 13, and the small rod 16 is fixed to the lifting lever 15. The movable device 12 is linearly moved toward the center of the step of the end portion 11a of the arm 11 by the operation of the small rod 16 as a result of the arm 11 being rotatably joined via the pin 16a. Actuation of the small rod 16 pivotally fixed to the end 11a causes an angular displacement of the lifting lever 15 and, in the rest position, the free end 15a of the lifting lever 15 supports the caisson 10. The arm 11 ′ abuts on the end 11 b side of the arm 11 ′, and the arm 11 ′ is driven upward by the angular thrust of the lifting lever 15, causing the arms 11, 11 ′ to rise in angle, and the movable device by the action of the rod 5. Horizontal to 12 steps center The movement of the pin 13 to the distal end 14b of the slot 14 causes the ends 11b, 11 'of the arms 11, 11' to be rotatably supported by the caisson 10 via the lifting lever 15. (b) a stand for raising the caisson (10).

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