FR2571037A1 - FORKLIFT - Google Patents

Abstract

THE INVENTION CONCERNS A LIFT TRUCK WITH A LIFTING FRAME, ON WHICH ARE GUIDED TWO CARRIERS 20, 27 MOBILE AT HEIGHT, RESPECTIVE LEVEL CONTROL ORGANS PROVIDED ON THE ABOVE FRAME. LOAD SUSPENSION DEVICES ARE PROVIDED ON ONE OF THE TROLLEYS. A BODYWORK 30 WITH A DRIVER'S SEAT 31, A CONTROL UNIT 33, AN ENERGY ACCUMULATION 34, IN PARTICULAR BATTERY AND OR HYDRAULIC SUB-GROUP 35, A CONTROL DESK AND OTHERS, IS MOUNTED ON THE SECOND CARRIER CARRIAGE 27. THIS TROLLEY ELEVATEUR IS A RIDER TROLLEY, WITH FRAME SIDE PANELS 1, 2 FOR VEHICLE WHEELS 3-6; THE SIDE UPRIGHTS 14 OF THE LIFTING FRAME 13 ARE FIXED TO THE PANELS 1, 2. THE TWO CARRIERS ARE MOUNTED ON THE ABOVE FRAME.

Description

7 1037

  The present invention relates to a forklift with a

  lifting frame, on which two carriages are guided

  movable at height, from the respective control members

  level being mounted on the aforementioned frame and arrangements

  load suspension devices being provided on one of the

carrier trolleys.

  A trolley of this type, already known from Patent DE 14 31 841 and represented by a stacker crane, is a forklift for order preparation. A load carrier accessory, mounted

  at the front on the lifting frame, and the location of the con-

  duct, provided at the rear, can be lifted there and a-

  lowered, the aforementioned movement being however simultaneous.

  On a corresponding vehicle, known by Patent DE 12 92 580, the location of the driver is movable vertically on a

  lifting frame, but the load carrier is adjustable in height

  the above location, so that the operator

  tor can easily load or unload the platform.

  A transelevator with two carrying trolleys is also

  Ment known by the Utility Model DE 77 08 142. The carriages have transverse forks, orientable or adjustable in the transverse direction. On this model, it is however advantageous that a specific lifting frame is assigned to each

  load carrier accessory. The objective of this type of construction

  tion is to allow, with elements particularly

  simple, a grouping of different transport units

  tees. The present invention aims to improve a forklift of the type previously described in terms of its employment possibilities, so that it can be used not only as a forklift, but also as a transport vehicle and as an adaptable stacker transporter, by a

  program command fQnction of the transported units.

  According to an essential characteristic of the invention, the forklift is designed in the form of a straddle carrier with side chassis panels for the vehicle wheels, the lateral uprights of the lifting frame

  are attached to the aforementioned chassis panels and the carriage-

  laughs with the driver's seat, the control unit,

  the accumulation of energy, in particular battery and / or under-

  hydraulic unit, the control console and others, is mounted on a second carrier trolley, with a possibility of displacement in height independent of the first trolley,

  equipped with load suspension devices.

  Since it is designed as a straddle carrier, this forklift can pass over

  transport when the space between the side panels

  is cleared by sufficient lifting of the carriage

  for example. This vehicle, which may still have

  load suspension devices between the side panels

  rals, as on the straddle carriers already known, so

  remove and deposit independent transport units

  particularly stacking operations on the lifting frame, is particularly suitable for programmed management of stocks. It should be noted in this regard that straddle carriers according to Patent GB 909 994 have, in the gantry frame, supports oriented downwards with loading arms. These can be arranged laterally and be aligned with the center of the vehicle, or be

  provided at the front and rear with mutual alignment.

  However, for transport purposes, the possibilities of using such straddle carriers are limited. The forklift truck according to the invention can also perform such functions, but it can simultaneously, for inventory management programs, move transport units up and down, in order to load or clear storage areas. In order to be able to serve reserve areas of transport units, the suspension devices of the carrier trolley can also be lowered below the level of the vehicle track. This last possibility is also offered by the mounting of downward-oriented supports, in the portal frame. These supports can then be modified in

  length, in the direction of the depth.

  In a preferred form of construction, the side panels are connected by spacers of the lifting frame, provided above the aforementioned panels. The assembly of

  carrier trolley then contributes to stability.

  In another preferred form of construction, the bodywork is connected to the side panels, with a possibility of vertical movement, by rods guided in the latter, these rods remaining in engagement with the panels when the second carrying carriage and the bodywork are raised. This measure increases stability, especially for a significant body weight. In this case, the rods are made in the form of racks or pins, to which is assigned a gripping element in the side panels, which also have corresponding control members for the aforementioned elements. These

  the latter may consist of gear wheels or nuts.

  The control members and / or motors are then connected to the lifting control of the carrier carriage attached to the

  bodywork, so that it results in syn-

chronized. -

  It is a good idea for the second carrier to be guided

  outside, on the mast uprights. It is then

  that the lifting cylinder of this carriage is mounted on

  the post of the mast, at the height of the side panels.

  In an advantageous form of construction, the side panels have, on their end opposite to the lifting frame, a section which pivots about a vertical axis and comprises a vehicle wheel, these pivoting sections being connected by means of a wheelhouse with mechanism

  steering, provided at the driver's location.

  A preferential measure then consists in assigning servomotors to the wheelhouse, these servomotors being connected

to the steering mechanism.

  In another judicious version of the present invention, a telescopic rod, the elongation of which depends on the stroke of the bodywork, is mounted between the wheelhouse and

the steering mechanism.

  The invention will be better understood using the construction examples shown in the accompanying drawings, which correspond to: Figure 1: a side view of a forklift according to the invention, Figure 2: a schematic top view of 'a section along line II - II of Figure 1, Figure 3: a view according to that of Figure 1 of a

modified form of construction.

  In all the figures, the same references are given

with similar elements.

  The vehicle shown in Figures 1 and 2 has on each of its sides a side support panel 1,2, in which are housed the wheels 3, 4 and 5, 6. The wheels 4, 6 are the steered wheels. They are provided on a section 9, 10 of each panel, this section being able to pivot around a vertical axis 7, 8. The wheels 3, 5, respectively driven by a control motor 11, 12, are mounted at the end side panels 1, 2, on

  which the lifting frame 13 is provided for.

  The control of the motors 11, 12 is not detailed in the figures. It is a conventional system, the motors 11, 12, provided on both sides of the vehicle, which can be synchronized or alternately driven at different speeds, depending on the curves to be negotiated. This kind of

command is already known.

  The pivoting sections 9, 10 are provided at the ends

  side panels 1, 2, distant from the lifting frame 13.

  The latter, generally referenced by 13, is represented by a telescopic frame, fixed by its uprights 14 (FIG. 2) on each of the panels 1 or 2. In these uprights 14, the

  telescopic mast elements 15, 16, are suitably guided

  using rollers. The uprights 14 are connected by a spacer 17, the telescopic elements 15,

  16 being connected by the spacers 18, 19. These three spacers

  rods 17, 18, 19, shown schematically, are located

  above side panels 1, 2 and / or line II -

  II of Figure 1, in order to clear the space between

the aforementioned panels 1, 2.

  Lifting devices, not detailed in the figures, are in particular represented by piston / hydraulic cylinder assemblies for the frame 13 and for a mobile carrying carriage 20, mounted on the internal telescopic element 16.

  such lifting devices are already known. It is before-

  geux that these piston / hydraulic cylinder assemblies are arranged bilaterally on the frame 13, near the uprights 14 of the mast, and / or on the front ends of the

  side panels 1, 2 (reference 21 in Figure 2).

  The various telescopic elements 15, 16 and the mast being conventionally connected by cable chains, this results in a synchronous movement of all the moving parts,

carrying trolley including.

  The carrying carriage 20 is shown in Figures 1 and 2 with a platform 24, on which rails are mounted

  telescopic 22, 23 with lateral exit. This is natural-

  ment of an accessory type of construction. At the level of the platform 24, the carriage 20 can also have forward-facing forks, a load suspension device, of the C-hook type, which can also be mounted on a boom, with a possibility of rotation.

  multilateral with respect to the center line of the platform

me 24.

  The carrying carriage 20, mounted on the front face of the lifting frame 13, extends forward relative to the

side panels 1, 2.

  It is visible that the lateral sides 25, 26 of the carriage 20 are guided in the internal telescopic element 16. It is

  possible to give these sides 25, 26 a longer length

  lower, in order to be able to lower the load suspension device of the carriage 20 below the rolling track of the wheels 3 - 6 in particular, and deposit, or resume, a load located in a reserve area, inside a central pit at the aforementioned track. Non-detailed auxiliary controls, which provide this downward movement, are

then provided for the carriage 20.

  Another carrier 27 is mounted on the lifting frame 13. It is guided on the only upright 14, as shown in

  dashed lines in FIG. 2 by the rollers 28, which engage

  gent from the outside in the corresponding profile. These rollers are connected by a spacer 29 shown schematically. This assembly makes up practically the entire body 30, shown in

details in figure 1.

  This second carriage 27 is constituted by the body 30.

  The latter includes the seat 31 with the conduc-

  tor 32, a control unit 33 represented by a desk

  assigned to seat 31, an accumulation of energy 34 constitutes

  killed by a battery and a hydraulic sub-group 35, with a hydraulic tank and a control device

  also hydraulic. The battery allows in particular

  ment the control motors 11, 12, but also other auxiliary motors, in particular those of the pumps provided for

  inside the hydraulic control circuits.

  The whole of this relatively heavy body 30 is

  grouped in side plates 36, which simultaneously form

  n the plates of the second carriage 27. If a guide roller 28 is assigned to the latter according to Figure 2, it goes without saying that at least two rollers 37, 38 are provided on each side, in accordance with Figure 1, these rollers being guided

as illustrated in figure 2.

  Since the bodywork 30 is always located above

  above the side panels 1, 2, on which it rests in the rest state, on the surface 39 for example, the carriage 27 has a minimum height on the mast. The vertical mobility of the bodywork 30 has the sole objective of modifying the height clearance of the gantry frame, to adapt it for example to the height of the different transport units. The mobility of the carriage 27 on the mast

is therefore sufficient.

  Due to the base height of the carriage 27, it is possible

  ble to provide lifting cylinders for the latter, including

  one is referenced by 40 in FIG. 1, mounted externally

  the mast in the guide of the rollers 37, 38, but

  below the latter, at the level of the side panels 1, 2. The pivoting sections 9, 10 of the panels 1, 2 are connected together by a linkage 41. It is possible to connect the latter to the carriage 27 and / or to the bodywork 30 and up

  the control unit 33 by means of a remote rod

  copic 42. It is then advantageous to provide servomo-

  teurs 43, supplied by circuits not shown and

  controlling the direction, according to the order data.

  It is possible to improve the stability of the assembly, according to FIG. 3, by rods 44, 45 oriented downwards, mounted on the side plates 36 of the carriage 27 and / or of the bodywork 30 and movable in height in guides. 46, 47, oriented accordingly and provided inside the side panels 1, 2. Suitable bearings can be

used for guidance.

  These rods 44, 45 then serve as auxiliary controls.

  They include, for example, racks on their right side, in which pinions 48, 49 mesh (FIG.

  3). The latter are fitted with control motors 50, 51.

  The arrivals and / or pilot circuits 52, 53 of these motors, 51 are connected to a control unit 54, which also actuates a pump 55 assigned to the cylinder 40 and which a junction 56 connects to the bodywork 30, to the accumulation 34, the hydraulic sub-unit 35 and the

command 33 in particular.

M7037

Claims (10)

Claims.   1. Forklift with a lifting frame, on which are guided two movable trolleys in height, respective level control members being mounted on the aforementioned frame and load suspension devices being provided on one of the carrying trolleys , characterized in that the lift truck is designed as a straddle carrier with chassis side panels (1, 2) for the vehicle wheels (3- 6), the side uprights (14) of the lifting frame (13) are fixed to the aforementioned chassis panels (1, 2) and the bodywork (30) with the driver's seat (31), the control unit (33), the accumulation   of energy (34), battery in particular and / or hydrau-   lique (35), the control console and the like, is mounted on a second carrier trolley (27), with a possibility of displacement in height independent of the first trolley (20),   equipped with load suspension devices.   2. Forklift truck according to claim 1, characterized in that the side panels (1, 2) are connected by   spacers (17 - 19) of the lifting frame (13), provided   above the side panels (1, 2).   3. Forklift truck according to claim 1, characterized   in that the body (30) is connected to the side panels   rails (1, 2), with a possibility of displacement in height, by means of rods (44, 45) guided in these panels (1, 2), and in that the rods (44, 45) remain in engagement with these last, even when the second carrying carriage (27) and the bodywork (30) are raised.   4. Forklift truck according to claim 3, characterized in that the vertical rods (44, 45) are produced in the form of racks or pins with a gripping element (48, 49), respectively assigned to a control motor ( 50, 51) whose pilot circuit is connected to the ? 1037   lifting control, in particular at the pump (55) provided for the   hydraulic cylinder (40) of the second carrier carriage (27).   5. Forklift according to any one of the claims   1 to 4, characterized in that the second carrying carriage (27)   is guided on the uprights (14) of the mast, outside no-   so much. 6. Forklift truck according to claim 5, characterized in that the hydraulic cylinder (40), assigned to the second carriage (27), is provided on the upright (14) of the mast, at   level of the side panels (1, 2).   7. Forklift according to any one of the claims   1 to 6, characterized in that the side panels (1, 2) have, on their end opposite the lifting frame   (13), a section (9, 10) which pivots about a vertical axis   cal (7, 8) and comprises a vehicle wheel (4, 6), and in this   that these pivoting sections (9, 10) are connected by the   steering wheel linkage (41),   provided at the location of the conductor (31).   8. Forklift according to claim 7, characterized in that servomotors (43), connected to the mechanism   steering, are assigned to the wheelhouse (41).   9. Forklift truck according to claim 7, characterized in that a telescopic rod (42), the elongation of which is a function of the stroke of the bodywork (30), is mounted   between the wheelhouse (41) and the steering mechanism.   10. Forklift truck according to any of the claims   1 to 4 and 7, characterized in that load suspension devices are mounted between the side panels (1, 2), these devices having supports oriented downwards, modifiable in particular in length, as well as loading arms.