FR2546229A1 - GALLERY SUPPORT DEVICE - Google Patents

Abstract

IN A DEVICE FOR SUPPORTING A DIGGED GALLERY USING A DIGGING MACHINE, AND WITH WHICH THE PRE-ASSEMBLED SUPPORTING FRAMES ARE TAKEN INTO THE DESIRED POSITION AND POSITIONED BY MEANS OF A LIFTING DEVICE, BY A TRANSPORT AND POSITIONING DEVICE THAT MOVES ON A BEAM BASED ON THE MACHINE; THE TRANSPORT AND POSITIONING DEVICE 5 HAS A PLATFORM 8 ORIENTABLE IN HEIGHT IN RELATION TO THE MOVEMENT PLAN ON BEAM 7 OF THE TRANSPORT AND PLACING DEVICE. THE LIFTING DEVICE 10 OF THE HATS OR HANGERS 11 OF THE SUPPORT FRAMES IS BASED ON THIS PLATFORM 8. ALSO, DEVICES FOR TRANSPORTING AND POSITIONING THE SIDE ELEMENTS OF THE SUPPORT FRAME ARE MOUNTED ON THIS PLATFORM. FORM 8. THIS ALLOWS TO BRING TO THE FRONT, ASSEMBLY, PRE-ASSEMBLED SIDE ELEMENTS AND PRE-ASSEMBLED HATS OR ROOF HANGERS 11 TO THE SITE OF THEIR PLACEMENT AND TO PUT THE SIDE ELEMENTS AND THE HANGERS OR CAPS IN A RELATIVE POSITION SUCH THAT IT IS POSSIBLE TO CONNECT THEM WITH THE OTHERS IN A SIMPLE MANNER.

Description

The invention relates to a device for supporting a gallery dug in

  using a digging machine, gallery with which the support frames, pre-assembled

  to a large extent are brought into the desired position

  rée by a device for moving and positioning mobile on a beam which rests on the cutter, and set up by means of a lifting device We know

  devices of this kind, for the mechanical installation

  support frames in a gallery, for example by European patent application EP-OS 37 807 With this

  known embodiment, elements of a provi-

  evening, namely in particular hats (or flanders) where the roof hangers were brought to the working face

  beyond the cutter; on it, a telesco-

  spike that can be deployed in the longitudinal direction

  the gallery served as a movement path for the handling and positioning device With this embodiment, it was not possible to bring at the same

  time at the front the side elements of a frame or

  we used to pitch, and we had to bring elements of the support frame separately, passing next to the machine

  digging galleries, to complete the support.

  Such a procedure posed a risk to the servants, and the digging had to be interrupted for a considerable time. proposed to move a frame, largely pre-assembled, using a

  transport device, passing it sideways-

  next to a tunneling machine After

  lowering the digging arm and pivoting it

  leading in a plane perpendicular to the longitudinal axis of the gallery, this frame could then be put in place,

  The device necessary for this purpose is still relative-

  complex, and the side elements of the support frame

  always have to be brought to a suitable position.

  owned by a team of servants, position in which

  the they can be connected to the hats.

  The invention aims to further increase the degree of

  mechanization of devices of this kind and to be mechanized

  nique in place the roof caps or roof hangers, as well as the side elements of the support frames, in a position where there is more than connect the elements together and complete them, if necessary , by the installation of spacers To achieve this object, the invention essentially consists in that the transport and installation device has a platform which is adjustable in height and orientable on the support, by relative to the support, at least relative to the plane of movement of the transport and positioning device, platform on which are mounted the device for lifting the roof caps or roof hangers of the support frames and a device for transporting and positioning the lateral elements of the support frame that can be moved in the direction of the axis of the gallery Because the platform is at least adjustable by being adjustable in height and that the device of the evage roof caps or roof hangers rest on the platform, this can be adjusted independently of the lifting height of the roof hanger lifting device or

  roof caps As this platform wears the

  positive transport and setting device

  lateral elements of the support frame, these elements

  side elements can be brought and placed in the correct position It is possible to bring to the front,

  beyond the tunneling machine, a cha-

  fully prepared roof skin or a roof hanger, with the necessary coating, for example grids or sheets, and put them in place directly in the

  desired position, without pivoting requiring significant means

  For this purpose, it is only necessary that the

  the element constituting the hat is raised up to the roof The transport and positioning system leads at the same

  time the lateral elements of the retaining frame,

  wedged in the direction of the axis of the gallery Thus, these side elements can also be provided with the

  garment desired and fully pre-assembled without,

  that these elements are brought to the front, there is a collision with the element forming the cap, with the side wall of the gallery or with the machine It is therefore possible to bring elements to the front

  pre-mounted support frame and, unlike -.

  of known devices, the device of the invention can

  be used directly for the implementation of a support

  final retention, so that the costly provisional support is eliminated Because the device for transporting the lateral elements of the support frame

  is made so that it can be placed in the dire-c-

  tion of the gallery axis, the lateral elements of the

  dre of support can be brought in the plan of

  mounting of this frame and it suffices to make the connection

  between the lateral elements and the roof hat or the roof hangers, in the immediate danger zone, near the cutting face Here too, the time required is much shorter, because the sections of the gallery support which are brought at the front can already be pre-assembled and ready for use The elements of the support frame can be put in the right position by

  compared to the gallery profile Because the

  lifting device for the roof cap or roof hangers and the device for transporting the side elements, which can be moved in the axial direction of the gallery,

  directly rely on this platform, we can

  be the roof cap or the roof hanger in a

  given position in relation to the lateral elements of the frame

  -By supporting the pivoting device

  wearing of the lateral elements of the latter, the elements of the frame can be directly placed in the position, relative to each other, in which it is possible

  to link them together - without any difficulty

  The work can also be automated without problems, which further reduces the duration of the digging interruption.

  Preferably, the steerable platform is mon-

  tee on the beam so that it can be tilted

  port to the movement plan of the transport device and

  The platform can in particular pi-

  vote laterally around the longitudinal axis of the

  tre or an axis parallel to this longitudinal axis, and the plane defined by the platform can also be inclined relative to the plane of the sole to compensate for inequalities

  The possibility of adjustment in height

  the platform also serves to compensate for inequalities

  beds of the sole and to create a starting position -from-

  shot from which the relative distance between the hat, when it is put in place, and the side elements is defined exactly when it was turned in advance in

  the plan of the support framework in place In particular

  link thanks to the possibility of height adjustment of the platform independently of the possibility of adjustment

  in height of the particular lifting device of the

  roof skins or roof hangers, we obtain here the fulfillment of the condition of an entirely unfolding

  automatic work, with which the pivoting of the elements

  lateral elements bringing them into the plane of the caps installed leads directly to the coincidence of the junction points between the cap and the lateral elements An additional compensation for positional defects of the digging machine is made possible, preferably because the swivel platform is mounted so

  to be able to pivot around an axis which cuts the plane of de-

  placement on the beam or which is roughly perpendicular-

  beam to this beam A rotation like this of the platform

  forms around an axis that crosses or intersects the long axis

  tudinal of the beam is desirable if a machine is not

  not exactly aligned on the longitudinal axis of the scab-

  laughs. The device for lifting the roof caps or roof hangers can have, according to the invention, in a way which is particularly space-saving, two

  connecting rods mounted on the platform and on which

  sticks a connecting rod bearing a support for hats or

  the roof hangers to be installed, this connecting rod fits

  being able on the platform by means of a cylinder A dispo-

  sitive like this is preferably done as

  straight guide, so that when lifted

  ve and brought against the roof, the caps are placed against this roof exactly above the position chosen for the platform The rectilinear guides of this kind are also called guides to lemniscate On

  can choose a similar embodiment for the re-

  sliding in height of the platform in relation to the plane of

  displacement ,, which gives reduced dimensions in height

tor when it is folded.

  The realization of the invention is particular-

  simple if the device for transporting the elements

  lateral support frames present, both sides

  platform tees, at least one link bar for

  before pivoting in the direction of the longitudinal axis of

  the platform, articulated on the platform, and on the-

  which acts a hydraulic cylinder which is articulated on the

  platform The lateral elements of the support frame

  are fixed in the raised position on the transport device in order to allow them to be brought into the mounting position without them touching the floor Thanks to the bar

  link which pivots on the platform

  shape, at the same time a position for the trans-

  port with which the side elements, when brought forward above the machine, do not hit the side wall of the gallery The connecting bars allow the side elements to pivot to

  bring them in the plane of the mounting position of the

  dres of support, and the link bar here also guarantees that, during this pivoting, the lateral elements

  do not hit the roof caps or hangers

  i in place After 1 e pivoting having brought them in the plane of the roof hanger or the roof cap put in

  place, just apply the elements outwards

  laughing, against the side wall; during this movement, it is possible to proceed at the same time with a downward movement towards the sole. For this purpose, the embodiment is preferably made in such a way that the lateral elements

  frame are connected to the connecting bars in a per-

  putting the height adjustment and in the plane of the frame.

  This possibility of adjustment can be carried out in a

  particularly simple lesson, in terms of design, with, on each side of the platform, two parallel connecting bars hinged to the platform so as to be able to pivot and connected at their free ends by means of a head ', a hydraulic cylinder which can be inclined relative to the plane of the parallelogram formed by the connecting bars resting on this head and the lateral elements being connected to the free end, in

  especially the end located on the side of the rod

  tone of the cylinder To adjust the tilt of this tilt cylinder, another hydraulic cylinder can be supported by

the platform or on the head.

  To spare the hydraulic cylinder producing the movement of application of the lateral elements against the side wall of the gallery, the lateral elements of the

  frame can, which is advantageous, be supported or re-

  linked to the free ends of the tilting cylinder, with in-

  terposition of an elastic element Instead of the relatively complex guidance of the orientable platform,

  can get a significant simplification of the realization

  tion if the platform is mounted on a column, so

  lesson to be adjustable in height Such a column

  ble in height allows, in a simple way, to mount a platform so that it can pivot and be tilted in all directions; it is advantageous that

  the column is adjustable in height and carries, outside

  laughing, a ball joint support on which the platform is mounted so that it can pivot The pivoting of the

  platform in relation to the head of a telesco- column

  height adjustable spike of this kind can be obtained, in a simple manner, if the platform rests on the head of the column by means of at least two hydraulic jacks placed in positions offset according to

the periphery of the column.

  Other particularities - and advantages of the invention -

  tion will appear in the description which follows,

  with reference to the attached drawing, which represents one

example of realization.

  Fig 1 is a side elevation view

  of a gallery, with a side view of a tunnel

  partially cut and mobile transport and positioning device, Fig 2 is a top view, in the direction

of arrow II of FIG. 1.

  Fig 3 is a front view of the gallery,

  view from the cutting face, with the sub-sections

held in the transport position.

  Fig 4 is a side view of the platform-

me of the lifting device.

  Fig 5 is a view of the platform of the

  Figure 4 in the direction of arrow V in Figure 4.

  Fig 6 is a view taken in the direction of

arrow VI of figure 5.

  Fig 7 shows a detail of the device

  separate transport of the lateral elements of the support frame

ment.

  Fig 8 is a view of what the fig shows

  gure 7, in the direction of arrow VIII of FIG. 7.

  Fig 9 is a side view of a device

  for lifting roof caps and roof hangers.

  Fig 10 is a side view of the gallery

  similar to that of FIG. 1, with an embodiment

  modification of the transport and installation device.

  Fig It is a top view of what my-

be figure 10.

  Fig 12 is a view in the direction of the arrow-

che 12 of figure 10.

  l a Fig 13 is a view along arrow 13

in Fig 10.

  Fig 14 is a sectional view of the realization

  tion of Figure 10 along line XIV-XIV.

  Fig 15 shows a detail of the articulation of the side elements on the transport device

Figure 10.

  Figure 1 shows a gallery 1 in which a partial cut digging machine 2 can be

  move in the longitudinal direction of the gallery.

  A digging head 4 is mounted on a digging arm.

  3 It allows, the transport and positioning device 5 being brought back to the left position,

  to cover the entire size 6

  tif transport and implementation 5 is shown, on the one hand, in position 5 'at the left end of the plane of movement of the beam 7, position in which

  the pre-assembly of the various support elements takes place

  The transport and positioning device 5 is

  then advanced, the digging arm 3 being placed

  in horizontal position, in the put position

  in place, in which we see it on the right in the fi-

  gure 1 The beam 7 rests on the digging machine 2 and on the digging arm 3, and the transport and positioning device 5 has a platform 8 which is orientable relative to the plane of movement

  on the beam 7 The connection points 9 of the elements

  lateral support elements and the lifting device used to install the roof hanger or

  roof cap 11 are based on this platform 8.

  The translation mechanism of the transport device

  and positioning 5 is designated by the reference 12.

  In the top view of FIG. 2, we see again the beam 7 on which the device

  transport and set-up 5 can move The fi-

  Figure 2 also shows the transport and positioning device 5, the cap being shown with the covering grid 13 A certain distance behind the

  plan 14 of the cap elements 11, put in place, the

  positive transport and installation 5 brings the elements

  side elements 15, already provided with covering grids 13 In the lower half of FIG. 2, it can be seen that

  these side elements 15 are brought offset in the di-

  rection of the axis 16 of the beam 7, behind the roof caps II; the particular transport device for the side elements 15 has connecting bars 17 which

  are articulated on the platform 8 so as to be able to

  vote In the upper half of Figure 2, these bars

  res link 17 are shown when they have pivoted forward their mounting position, and there is a hydraulic cylinder 39 which allows to place the side elements against the side wall 19 of the

  gallery As shown in Figure 3, the side elements

  15 of the support frame are brought into posi-

  tion of positioning, at the same time as the caps 11, in the raised position and at a certain distance from the side wall 19 of the gallery The side elements 15 are then, seen from the cutting face, in the direction of the gallery axis, in the transport position,

  behind the hats 11 The scabbard digging machine

  ries or the partial cut digging machine is sketched schematically, seen in cross section

with reference 2.

  The platform 8 of the transport and positioning device 5 is shown enlarged in the figure

  4 In position 8 'shown in phantom, posi-

  tion in which the platform 8 is lowered for the

  transport, it is based on the chassis by means of

  re connecting bars 20 and 21 as well as a hydraulic cylinder 22 In the low position, the connecting bars

  are designated by 20 'and 21' and the cylinder by 22 'The

  hydraulic rin 22 allows the plate to be raised and lowered

  shape, passing it from position 8 'in the po-

  sition shown in solid lines, in the direction of

  the double arrow 23 The platform 8 is connected to the bar-

  re upper link 21 of the drive device for adjusting the height, so as to be able to be inclined about an axis 24, which is perpendicular to the longitudinal axis of the gallery Another cylinder 26 is connected to the platform form through a piece of

  bond 25; it acts on platform 8, with swivels

  through an axis 27 The actuation of the cylinder 26 pro-

  duit a modification of the inclination of the platform 8 in the direction of the double arrow 28 relative to the plane of movement on the beam T The platform 8 rests on a turntable 29 mounted in the translation mechanism 12 of the transport and positioning device 5, this support being effected by means of a pivot axis 30 substantially perpendicular to the longitudinal axis 16 of the beam 7 FIG. 5 shows that the platform 8 can pivot around an axis parallel to the longitudinal axis 16 of the beam 7 In FIG. 5, we also see the turntable 29 on which the axis 30 is mounted A cylinder 31 allows * to pivot the platform 8 in the direction of the double arrow 32 On 1 l

  platform 8, we see the connection points

  terals 33 for the connecting bars 17 The rotation of the platform 8 about an axis 34 is produced by a hydraulic cylinder 35 which acts on the rotating plate 29, as FIG. 6 clearly shows. In Figure 7, we see the side edge 36 of the platform 8 on which are the connection points 33 for the connecting bars 17 forming a

  parallelogram The connecting bars 17 are articulated

  lées on the platform 8, by pivoting around axes 37

  and their free ends have a head 38 A

  hydraulic rinse 18 is connected to this head 38 so that it can be inclined relative to the plane defined by the

  connecting bars 17 The free end of this hy-

  18 carries the side elements 15 of the frame

  support which are drawn in broken lines The pi-

  voting on the connecting bars-17 is done by means of a hydraulic cylinder 39 which acts on one of the two connecting bars 17 and which is connected to the platform 8 by a boss 40 The pivoting brings the connecting bars 17 in position 17 'shown in phantom and in which the side elements 15 come in the plane

  1 11 caps installed Due to the characteristics

  geometric ticks of the connecting bars 17 forming a parallelogram, the pivoting must be done in a

  position in which the hydraulic cylinder 18 is returned

  very, in order to guarantee that there is sufficient distance

  relative to the side wall of the gallery In action-

  nant the hydraulic cylinder 18, we can then exit.

  the side elements 15 by bringing them against the side wall of the gallery; an inclination of the actuator 1-8 relative to the plane of the parallelogram defined by the connecting bars 17 allows a movement of the lateral elements directed outward and downward The modification of the inclination of the actuator 18 is done by means of another

  cylinder 41 connected to platform 8, and which acts on the former

  free end of the jack 18 This will be explained in more detail using FIG. 8 The platform is also designated by the reference 8, and the position of the elements

  15 during transport as well as that of the vehicle

  hydraulic rinse 18 during transport are shown in solid lines After the connecting bars 17 have pivoted to be in the plane of the caps put in

  place, the jack 18 pivots, taking the position 18 'shown

  felt in a dashed line, and, in this way, it brings the side elements 15 into the position o the hat It

  can be connected to the side elements 15 In this po-

  sition, just proceed to the link between the cha-

  skin It and the side elements 15, after which the cylinder

  18 can be released from the side elements 15 and retracted.

  The cylinder pivots again from position 18 'to the posi-

  tion 18, and, thus, it is in the position of

  part in which the connection of connecting elements, correct laterally and in height, in position

* mounting is possible.

  FIG. 9 schematically represents an arrangement

  lifting device 10 of the roof caps 11 The lifting device 10 rests on the platform 8 and has

  two connecting bars 42 and 63 articulated on the platform

  form 8 A connecting bar 43 is articulated on the connecting bars 42 and 63 These connecting bars are supported on the platform 8 by means of a jack 44 On

  thus obtains guidance from lemniscate which allows

  climb a relatively large height "a", respecting

  to a large extent the conditions for straight guidance

  line, with a small footprint of the lifting device when it is in the retracted position The correct position of the caps 11, for pivoting, can be obtained by means of an auxiliary adjustable connecting bar 45 which makes it possible to fix in advance the correct position of the caps 11 in pivoting, as a function of the height a, which is given, by means of an adapter sleeve 46 To reduce

  still the size, the connecting bar 43 is bent.

  With the device of the invention, the plane of the platform 8 is established, first of all in agreement with

  the possibilities indicated in Figures 4, -5 and 6, in ac-

  operating hydraulic cylinders 22, 26, 31 and 35

  from this position, the lifting device is deployed

  ge 10, on its prescribed stroke "a", which can be provided in such a way that the pivoting of the connecting bars 17,

  to which the side elements are connected, gives direct

  the mounting position as soon as the hydraulic cylinders

  that 18 place the side elements against the wall la-

  19 of the gallery After the establishment of the link

  sound between the caps and the side elements, the

  positive lifting and positioning can again be brought back to its starting position, by pivoting, and be brought by rolling in a place, behind the machine, where the

  further pre-assembly can be done in the protected area.

  For the embodiment of FIG. 10, the

  digging machine is again designated by the re-

  ference 2 The transport and de-installation system

  47 is mounted, in this embodiment, on a column

  ne 48 adjustable in height, and it can be moved along the track 7 The preassembled side elements 15 of the frame, as well as the preassembled roof caps 11 are

  brought, by means of a mounting crane 49, to the dispo-

  positioning and transport sitive 47, which has been put in its rear position, then brought into the upright position in FIG. 10, after which, in a manner analogous to that which has been described for FIGS. 1 and 2 , the column

  48 is high and the roof cap 11 is put in place.

  In figure ll, we see again the bars

  link 17, which form a parallelogram, and the

  pivot for pivoting and positioning the side elements

  15 is again designated by the reference 18 For a perfect energy supply, there is, as shown in FIGS. 10 and 11, a chain 50 In the view

254 6229

  from above in FIG. 11, in the extreme right position, the lateral elements 15 are shown when they have already moved into the plane of the frame by pivoting

  and that they have already been placed in their correct position

you.

  In FIG. 12, the column 48 is mounted on one.

  turntable 29, the rotation control being again designated by the reference 35 We see a hydraulic cylinder

  hydraulic 51 which makes it possible to adjust the inclination of the platform 8 In the representation of FIG. 12,

  the roof caps Il are in place The head 38 which

  connects the two connecting bars 17 of the transfer device

  port of the lateral elements 15 carries the pivot axis of the hydraulic cylinder 18 which serves to rotate the

  side elements 15 and to put them in place, the pivot

  ment being produced by a jack-52 which also leans

  on this head 38 To absorb hard shocks, elements

  elastic shock absorbers 53 are mounted at the end

  located on the side of the piston rod.

  With the embodiment of Figure 13, the mounting crane 49 is shown in a rotated position

  of 900 This assembly crane 49 makes it possible to fix the cha-

  11 roof skins fully assembled as well as the elements

  side 15 on the positioning and transfer device

  port 47, the lateral elements 15 being again placed, in the transport position, behind the bonnet 11 The crane

  mounting 49 is placed at the rear end of the pouch

  tre 7, on a transverse beam 54 In FIG. 14, the

  height-adjustable column 48 is shown enlarged.

  The height-adjustable column 48 is connected to the turntable 29 and the rotation control is again

  designated by reference 35 A 55-step hydraulic cylinder

  stand inside the height-adjustable column 48; The working space of this jack is designated by 56 When the working space 56 is pressurized, the head 57 of the height-adjustable column 48 comes out in the direction of the arrow. 58 Outside the head 57 is set a

  ball joint support 59 on which the platform 8 rests.

  We see a pivoting cylinder 51 which makes it possible to tilt the platform 8 relative to the column 48 Similarly, a second hydraulic cylinder is mounted, offset by 90 in the peripheral direction, and it makes it possible to produce in a similar manner the inclination perpendicular to the inclination produced by the hydraulic cylinder 51 which is shown This second cylinder is not shown on

the figure.

  Figure 15 is an enlarged representation of the connection between the side elements 15 and the end

  of the hydraulic cylinder 18 The damping element 53 is re-

  linked to the lateral elements 15 of the frame by an element

  intermediate 60, and it acts eccentrically, by means

  a connecting element 61, on the end of the cylinder if

  killed on the piston rod side Direct articulation

  side elements 15 on the end of the hydraulic cylinder

  lique 18 located on the side of the piston rod is made by

  through connecting elements 62.

Claims (8)

R E V E N D I C A T I O N S   1 Support device for a hollow gallery   seed using a digging machine with which the   support frames are brought in, pre-assembled in a large   ge measure, in the desired position and set up using a lifting device, by a transport and setting up device which can move on a beam resting on the machine-, characterized in that that the transport and positioning device (5, 47)   presents a platform adjustable in height and orienta-   ble with respect to the beam (7), at least with respect to the plane of movement of the transport and positioning system on the beam (7), platform on which the lifting device (10) of the caps are mounted roof or roof hangers (11) of the support frames and transport devices (17) and positioning (18, 39) of the lateral elements of the support frame can   be moved in the axial direction of the gallery.   2 Device according to claim 1, charac-   terized in that the orientable platform (8) is mounted so as to be able to be inclined relative to the plane of movement on the beam (7): 3 Device according to claim 1 or 2, characterized in that the platform orientable (8) is mounted so as to be able to pivot about an axis (34) approximately perpendicular to the plane of movement on the beam (7).   4 Device according to claim 1, 2 or 3, characterized in that the lifting device (10) mounted on the platform (8) has two connecting bars   (44, 63) articulated on the platform (8) and on the-   which is articulated a connecting bar (43) present   both a support for the hats and roof hangers (11) to be put in place, and which rests on the platform (8) through a cylinder.   Device according to any one of claims 1 to 4, characterized in that the device   transport of the lateral elements (15) of the support frame   at least one connecting bar (17) articulated on the platform (8) and able to pivot in the direction of the longitudinal axis of the platform (8) on both sides of the platform (8) , and on which acts   a hydraulic cylinder (39) articulated on the platform (8).   6 Device according to any one of the res-   dications 1 to 5, characterized in that the side elements   rails (15) of the retaining frame can be connected to the connecting bars (17) in a height-adjustable manner and in the frame plane.   7 Device according to any one of the res-   dications 1 to 6, characterized in that, on each side of   the platform (8), two connecting bars (17) parallel   the are articulated on the platform (8) so as to be able to pivot and are connected, at their free ends,   by a head (38), in that a hydraulic cylinder (18) can   before being inclined relative to the plane of the parallelogram formed by the connecting bars (17) is mounted on the head   (38) and in that the side elements (l 5) can be-   be connected to the free end, in particular the end   located on the side of the piston rod, of the jack (18).   8 Device according to claim 7, charac-   terized in that the hydraulic cylinder (18) rests on the platform (8) or on the head (38) via   another hydraulic cylinder (52).   9 Device according to any one of the res-   dications 1 to 8, characterized in that the side elements   frames (15) of the frame can be supported or connected to the ex-   free hoppers of the tilting jack (18)   diary of an elastic element (53).   Device according to any one of the res-   dications 1 to 9, characterized in that the platform (8) is mounted on a column (48) so as to be adjustable in height.   It Device according to any one of the res-   dications 1 to 10, characterized in that the column (48) is telescopically adjustable in height and carries, at   outside, a ball joint support (59) on which the platform   form (8) is mounted so that it can pivot.   12 Device according to claim 10 or 11, characterized in that the platform (8) is supported on the column head (57), by means of at least two   hydraulic cylinders (51) mounted in offset positions   tied along the periphery of the column (48).