FR2822124A1 - Pallet handling trolley has safety rail for rider in form of deployable arms - Google Patents

Abstract

The trolley (1) with pallet handling forks (2) is controlled by a lever (4) operated by a person on foot or riding on a rear folding platform (3). A safety rail for the rider is provided by two folding arms (6), each with a lower end plate at an angle of 135 deg, pivoted to the projecting wing (7) of a U-shaped support (5), the wing being inclined at 45 degrees to the trolley's lengthwise axis. The horizontal base of the support is fixed across the rear of the trolley, with the wings extending upwards from it. The arms can be folded down across the back of the trolley when not in use and are fitted with detectors that prevent the trolley travelling at its highest speed when they are not deployed and locked.

Description

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 The invention lies in the technical field of pallet truck type handling carts and more precisely those having a folding platform; it particularly relates to a railing with retractable arms.

 Motorized pallet trucks, in order to be able to be used by a transport driver, are equipped with a fixed or folding platform, fixed at the rear, on the chassis of the device, on the side opposite the fork arms. When the driver is mounted on the platform, it is essential, for safety reasons at a certain speed (6 km / h), that arms forming a guardrail be deployed as high as possible on each side of the driver. If the latter maneuvers the carriage while accompanying it, the platform is advantageously folded back against the chassis, as well as the guardrail arms. For this, the arms are usually articulated on an upper part of the chassis, and in certain embodiments, they are embedded in cells provided for this purpose. It is indeed important that the movement of the drawbar of the carriage is not hampered by the arms in question. When the drawbar is mounted in the low position, see in the intermediate position on the chassis, it is difficult to fix retractable arms on the top of the device, especially since often the main body of the carriage hardly develops in height for allow the driver to have good forward visibility.

 The invention provides an interesting solution to this problem by proposing a railing with retractable arms which, in the folded position, fade against the rear part of the chassis over a small height, and are capped by the folded platform and which, in deployed position, develop laterally above the horizontally placed platform up to a height substantially corresponding to the hips of the driver carried, thereby improving safety conditions during the maneuver of the trolley.

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support, ladite aile étant inclinée à 450 par rapport au plan longitudinal du chariot. The main object of the invention is therefore a railing for a pallet truck type handling trolley, preferably having a folding platform along the chassis, a railing according to which each arm has a lower part bent at 1350 per ratio. on the arm and forming a flat, which pivots on a wing of a

support, said wing being inclined at 450 relative to the longitudinal plane of the carriage.

 According to another particular characteristic of the invention, each arm has the shape of a stick, a curvilinear part of which develops from a base and is capped with a protective cuff.

Other characteristics and advantages of the invention will emerge from the description which follows of an exemplary embodiment in which reference is made to the appended drawings which represent:
Figure 1, a general perspective view of a handling cart.

 Figure 2, a perspective view of a retractable arm.

 Figure 3, a partial perspective view showing the carriage with its guardrail arms in the intermediate folding phase.

 Figure 4, a view according to Figure 3 with the arms folded.

 Figure 5, a general perspective view of the carriage with the arms folded and the platform folded down.

 Figure 1 shows a pallet truck essentially consisting of a central compartment 1 forming a chassis which has two forks 2 at the front, and a rear platform 3 foldable against the central compartment, which can receive a transported conductor. This one, whether on the platform or alongside, accompanying, accesses a drawbar 4 which is tiltable back and forth and which can pivot from left to right relative to a fixed base.

 A support 5 is attached to the rear part of the chassis

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 U-shaped on which are articulated side arms 6 constituting the railing. The horizontal base of the support 5 is attached transversely to the rear of the chassis, and carries two lateral wings 7 inclined at 450 relative to the longitudinal axis of the carriage and which rise up above the horizontal base.

 It can be seen more precisely in FIG. 2 that each arm 6 has the shape of a stick whose base 8 which is the horizontal part visible in FIG. 1 is bent at an angle a of 135, the bent end part forming a flat 9 swiveling on the end of the wings 7 by an axis 10. From this base 8 of the stick the arm 6 develops upwards which we see in the figures that it is curvilinear and that its end is capped with '' a protective sleeve 11.

de l'inclinaison à 450 des ailes 7 par rapport au plan longitudinal du chariot, et du fait du coude de 1350 des bras par rapport un méplat 9 de raccordement aux dites ailes, chaque bras 6 se développe donc parallèlement à l'axe longitudinal du chariot, les manchons d'extrémité 11 se trouvant de ce fait en un point haut situé sensiblement au niveau des hanches de l'utilisateur. Le bras 6 est verrouillé dans cette position haute par un doigt d'indexage pénétrant dans un orifice approprié de l'aile 7, le doigt étant dégagé de l'orifice par l'utilisateur en tirant sur un bouton 12 porté par le méplat 9, à l'encontre de la force de rappel d'un ressort non représenté. Referring to Figure 1, we see that, because

of the inclination at 450 of the wings 7 relative to the longitudinal plane of the carriage, and due to the 1350 bend of the arms relative to a flat 9 for connection to the said wings, each arm 6 therefore develops parallel to the longitudinal axis of the carriage, the end sleeves 11 therefore being at a high point situated substantially at the level of the user's hips. The arm 6 is locked in this high position by an indexing finger penetrating into an appropriate orifice of the wing 7, the finger being released from the orifice by the user by pulling on a button 12 carried by the flat 9, against the return force of a spring not shown.

 From this position, arms extended, illustrated in FIG. 1, the user can, after unlocking each indexing finger, fold the arm by making it rotate down around the axis 10. We see in FIG. 3 an intermediate position of the arms 6, during their withdrawal movements, materialized by the arrows.

 Figure 4 shows the arms fully folded.

Since the arms proper are bent at 1350 paar compared to the flat 9 and therefore relative to the wings 7 of the

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 support 5, they are in this position, perfectly flat against the chassis of the carriage, the sleeves 11 then being in the low position. The arms 6 thus take up little space against the carriage, which allows the user to fold over the platform 3 as seen more precisely in FIG. 5.

 Note that thus folded, the arms provide between them a V-shaped notch and therefore do not prevent the inclination of the drawbar 4, the carriage being thus easily maneuverable by an accompanying driver.

 Contactors not visible in the figures are provided on the wings 7, near the flat 9 of each arm, for detecting their position and locking them, in order to authorize the operation of the carriage at the required speed depending on the mode of use chosen.

Claims (4)

 1.-Guardrail with retractable arms for pallet truck type handling trolley preferably having a folding platform along the chassis characterized in that each arm (6) has a lower part bent at 1350 paar relative to the arm and forming a flat (9) and in that the flat of the arm swivels on a wing (7) of a support (5), wing which is inclined at 450 relative to the longitudinal plane of the carriage.  2.-Guardrail with retractable arms according to claim 1 characterized in that the support (5) is U-shaped, whose horizontal base is attached transversely to the rear of the frame and whose wings (7) inclined to 45, extend upward above the horizontal base.  3.-Guardrail with retractable arms according to claim 1 characterized in that each arm (6) has the shape of a stick of which a curvilinear part developing from a base (8) is capped with a protective cuff (11).  4.-Guardrail with retractable arms according to claims 1 and 2 characterized in that the flat (9) of the arm (6) carries a button (12) for the operation of an indexing finger penetrating into an appropriate orifice of the wing (7) of the support.