ES2394439B1 - COVER SYSTEM FOR HOOK TRUCKS OR AUTOPORTANTS. - Google Patents

Abstract

Covering system for hook or self-supporting trucks. # The system comprises: -two stringers mounted on the sides of the container loading platform with the possibility of longitudinal displacement between a previous position and a rear position, - the lower ends of the arches of support of the covering canvas mounted with the possibility of longitudinal displacement with respect to the stringers, between a folded position and an unfolded position of the canvas, -a previous bridge fixed to the front end of the stringers and to which the front end of the canvas, -a means of linear displacement of the lateral stringers and of the support arches of the canvas and, -a command, provided with buttons for the activation and control of the operation of the means of linear displacement.

Description

COVER SYSTEM FOR HOOK TRUCKS OR AUTOPORTANTS.

Object of the invention.

The present invention relates to a covering system especially suitable for trucks called "hook" or self-supporting,

container transport employees; being the purpose of this

cover and uncover any type of protection

container when transported on the truck platform, in a safe and automatic way, without the need to be manipulated by the driver or

No other operator thus avoiding any risk of accident.

Background of the invention.

Currently, for safety reasons, it is mandatory to cover the waste during transport to avoid any possible detachment of the load on the

road, which could cause an accident. This system allows transport

of the container always covered, both loaded and empty, thus preventing any remaining cargo deposited in the box once emptied into the roadway, such as dust, papers, etc. that can be dragged by the wind. At present, truck covering systems already exist in the market

conventional as dumpers, bathtubs and other types, provided with fixed boxes adapted to the chassis. These types of vehicles are used to transport

waste and also of land and aggregates. In this type of vehicles, the covering system includes two longitudinal glues adapted to the box and on which arches that support a canopy are mounted with the possibility of sliding, and are dragged well by means of a steel cable or Na chain This

30 arc displacement can be manual or motorized.

This system is not applicable to waste trucks that have a rear platform and a movable hook for hitching and hauling

a cargo container on support rollers located in the area

rear of the platform until its horizontal placement of the platform, since

these trucks do not have the box mentioned above and that in the

loading position the container protrudes from the rear end of the platform, so the placement of the arches over the length of the platform is not sufficient to fully cover the container. The transport of

Waste in this type of truck requires that cargo be kept covered

during transport, and mounting the canvas on the container is not a practical solution, since the containers are not associated with a

specific truck, if not remain uncovered in the same location: ion

until its filling and collection; working the trucks with different

containers based on the routes assigned based on the containers

to transport on each day. Due to this problem, the technique used by the driver or operator assigned to the truck consists of getting on the truck platform and the container loaded on the platform for manual positioning and fixation.

of the canvas on the container, with the consequent risk of accidents.

When the container is on the platform, the upper end of the

It is at a height of more than 2.5 meters, so the person in charge of placing and removing the covering canvas must observe the existing safety regulations, which requires the use of harnesses or other equipment

personal protection. The use of these protective equipment means a

encumbrance and the use of excessive time in the placement or removal of the canvas, it is customary for the operator to systematically violate safety regulations, with the consequent risk of occupational accidents and penalties

for the user and for the contracting transport company.

Description of the invention

The covering system for hook or self-supporting trucks object of the invention has constructive particularities oriented to solve the exposed problem and to achieve the placement and removal of a covering canvas on the container loaded in the truck, in a way

Automatic and convenient. ensuring the coverage of the entire container. even from that rear portion that protrudes from the platform and without

need for the operator to get on the platform or container.

This covering system is of the type that has a covering canvas associated with a plurality of support arches moving bias longitudinally with respect to the truck.

According to the invention, this system comprises:

two stringers mounted on the sides of the loading platform

of the container with the possibility of longitudinal displacement between a position

previous in which they are arranged in correspondence with said sides of the

platform and a rear position where they protrude from said sides

towards the back area.

the lower ends of the support arches of the covering canvas mounted with the possibility of longitudinal displacement respec + ') to

the stringers between a folding position of the canvas. in the said arches that

there are terraced houses in the front area of the stringers, and a position of

unfolded from the canvas in which said arches are spaced apart from each other and distributed along the mentioned stringers. an anterior bridge fixed to the anterior end of the stringers and to which the anterior end of the canvas is fixed.

means of linear displacement of the lateral stringers, together with the anterior bridge, between the two anterior extreme positions and

later. and of the canvas support arches between the folding and unfolding positions of the canvas and

a command, provided with some buttons for the activation and control of the operation of the linear displacement means.

The assembly of the stringers with the possibility of longitudinal displacement along the sides of the platform allows said stringers to be arranged in the aforementioned rear, so that at least the rear arch is arranged, in the position of use of the system, in a position more delayed than the rear end of the platform ensuring that the canvas covers the entire container, including that rear portion thereof, which, in the loading position, protrudes from the rear end of the platform.

In one embodiment of the invention, the canvas support arches comprise two lower pillars, provided with guide means with respect to the longitudinal stringers and an upper section of an inverted "U" configuration, the lower ends of which are telescopically mounted on the respective lower pillars, for positioning at a variable height.

This telescopic configuration of the support arches

allow to vary its total height to ensure coverage by the canvas

associated with container arches of different heights and eventually of

the stacked load that can protrude from the top plane of the container.

In one embodiment of the invention the successive arches are related to each other by scissor mechanisms that are arranged in the canvas pick-up position and extended in the

canvas unfolding position.

These scissor mechanisms are intended to provide a

greater stability of the arches in the deployed position of the system, in which

said arcs are spaced apart from each other and distributed throughout the length

of the stringers.

In one embodiment of the invention, the lateral stringers have stops for their fixation in the extreme, anterior and posterior positions, by means of a set of ratchets associated with the fixed structure of the platform. Said set of ratchets are intended to limit the longitudinal displacement of the stringers with respect to the truck platform and perform a

stable retention of the same in either of the two extreme positions, anterior or posterior. The invention also provides that the rear arch has a stop for temporary retention in an intermediate zone of its

route, by the aforementioned set of ratchets, during folding and unfolding of the canvas. According to the invention, the ratchet sets are arranged one on each side of the platform; comprising each of the games of

ratchets, at least: a front ratchet, an intermediate ratchet and a

rear ratchet.

The aforementioned ratchets ratchets are related to each other by means of selective unlocking, so that by means of a continuous advance of the means of linear displacement, in the same direction it is achieved, both the displacement of the stringers between the zones

anterior and posterior, such as the displacement of the arcs between a position

initial in which they are arranged grouped in the anterior area of the stringers and

a final position in which they are distributed throughout the length of the

stringers

The stringers have at their rear end limit detectors that cause the stop of the linear displacement means when the rear arc reaches the most delayed position on said stringers.

According to the invention, the front end of the canvas is arranged on the upper and front areas of the previous bridge and is fixed to an area located at an intermediate height of said previous bridge; said anterior bridge comprising in its upper zone front tensioners, actuated by elastic means and acting against the area

anterior-superior of the canvas tending to move it towards the previous area, establishing its tension. Fixing the front end of the canvas on a

intermediate area of the anterior bridge and the action of the mentioned front tensioners against the inner surface of the canvas determines that said canvas defines

in front of the bridge an ascending ramp towards the upper area of the bridge

front and whose lower end is located behind the cab of the truck. In an embodiment of the invention said tensioners are formed by plates mounted frontally on the upper end

of the anterior bridge by means of folding arms on cough that act the

elastic means. This ascending ramp acts as a wind deflector during the movement of the truck displacement preventing the wind from producing a

uncontrolled movement of the canvas or what is known as the candle effect.

In one embodiment of the invention, the stringers are located

mounted on opposite sides of the loading platform by means of

two sets of cylinders, hydraulic or pneumatic, arranged transversely with respect to the longitudinal axis of the truck and moving said

stringers between two extreme positions varying the separation between

same.

This feature allows to increase the separation between the two stringers during the loading or unloading operations of the container, avoiding contact with the covering canvas, and reducing said separation, achieving a greater adjustment of the canvas to the container in the operative covering position. .

Description of the figures.

To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings is attached to the present specification in which, for illustrative and non-limiting purposes, the following has been represented:

Figure 1 shows a schematic elevational view of an embodiment of the system of the invention, with the canvas folded, the lateral stringers retained in the previous position by the front ratchets and with the arches grouped in the anterior area of the lateral stringers .

Figure 2 shows a view analogous to the previous one with the system in a first position of movement during the unfolding of the canvas and with the posterior ring displaced from its initial position and retained by the intermediate pawls, producing at this time the release of the lateral stringers by the front ratchets.

Figure 3 shows a view analogous to the previous ones with the system in a second position of movement in which the lateral stringers have moved to the rear position and are retained by the rear ratchets, producing at this time the release of the posterior ring by the intermediate ratchets.

Figure 4 shows a view of the system in the fully deployed position of the canvas.

Figure 5 shows an inner side view of the rear hoop mounted on the corresponding lateral stringer, of the linear displacement means and of the pawl set for the retention of the rear hoop and of the lateral stringers in the different displacement positions.

Figure 6 shows a top plan view of an exemplary embodiment of the front tensioners mounted on the top bridge, and in which one of the tensioners is shown in the retracted position and the other in the deployed position,

Figure 7 shows a schematic plan view of an embodiment of the invention in which the stringers are mounted on the opposite sides of the truck platform by means of two sets of hydraulic cylinders arranged transversely and allowing the separation between said stringers Embodiment of the invention

In the example of embodiment shown in the attached figures, the covering system for hook or self-supporting trucks comprises two stringers (1) mounted with the possibility of longitudinal displacement on the sides of the truck loading platform (P).

On the lateral stringers (1) are mounted: an anterior bridge (2) fixed to the anterior end of the stringers, movable arches (3) for supporting the covering canvas (4) and means for linear displacement of the stringers lateral (1) together with the previous bridge (2) and the arches (3).

In the example shown, the linear displacement means are constituted by two motors (5) fixed in the respective stringers (1)

lateral and that communicate a turning movement, in the direction of advance or of

recoil to an endless screw (51) mounted with the possibility of turning on the respective side member (1) and coupled with a nut (52) fixed to the lower end of the rear arch (3).

Each of the arches (3) two lower pillars (31) provided

whose lower ends (32) have guiding means with respect to

the respective stringers (1) and an upper section (33) of inverted "U" configuration, the lower ends of which are telescopically mounted

in the respective lower pillars (31), for positioning at a height

variable.

The successive arches (3) are related to each other by scissor mechanisms (34) that have been represented only in the position

extended, in figures 3 and 4. The stringers (1) and the rear arch (3) have stops

(11) AND (35) respectively for fixing in different positions during folding and unfolding of the canvas (4), with the intervention of two sets of ratchets (61, 62, 63) of retention, arranged one on each side of the truck platform and associated to the fixed structure of the platform (P).

The longitudinal displacement of the stringers (1) with respect to the sides of the platform, allows the arrangement of the stringers in: -a previous position, represented in figure 1, in which they are arranged in

correspondence with said sides of the platform (P) and, -a position

later, represented in figures 3 and 4, in which they protrude towards the area

rear of the platform to allow the canvas (4) to cover the entire container (C) loaded on the platform (P). The stops (11 and 35) of the stringers (1) and the rear arch (3), in

combination with the set of ratchets on the corresponding sides

allow the rotation of the augers (51) driven by the respective motors

(5) provoke by means of a continuous movement and in the same direction the displacement of the stringers (1) towards the back area and the distribution of the arches (3) along the stringers, with the consequent unfolding of the canvas (4 ) -Fig. 4 -and, by means of a continuous movement in the opposite direction the movement of the stringers (1) towards the previous position and the collection or accumulation of the arches (3) in the anterior area of the stringers with the consequent folding of the canvas (4 ) -Fig. one-.

The canvas deployment operation can be seen in the

sequence of figures 1 to 4.

Specifically, in figure 1 the stringers (1) are

retained in the previous position by the action of the front ratchets (61)

on the stops (11) also front of said stringers (1). When the button corresponding to the canvas unfolding operation (4) is actuated in the control (53), the motor (5) transmits to the worm screw (51) a turning movement in a certain direction, which causes the displacement of the rear arch (3) towards the rear area of the truck, until the stop (35) of

said rear arc (3) reaches the position represented in figure 2 and is

locked by the intermediate ratchet (62).

At that same moment the unlocking occurs automatically

the front ratchet (61) and advance of the stringers (1) together with the motor (5) and the worm (51), since the rear arch (3) is

unable to move.

The stringers (1) continue to advance and protrude through the rear area of the platform until the rear stop (5) of said stringers (1) reaches and is retained by the rear ratchet (63), as shown in Figure 3 .

At that precise moment the unlocking of the intermediate ratchet (62) automatically takes place and the rear arch (3) is released, which is moved by the endless thymes (5) until reaching the rear end of the stringers (1), such as It is shown in figure 4.

This displacement of the rear arch (3) causes, with the collaboration of the scissor mechanisms (34) the distribution of the remaining arches (3) over the entire length of the stringers and consequently the extension of the canvas.

Both the stops (11 and 35) and the ratchets (61, 62, 63) can have different configurations, since this does not affect the essence of the invention. Similarly the means used to cause the

Unlocking one of the ratchets when one of the stops reaches another ratchet can also be varied. However, for illustrative purposes only, in figure 5 it has been

represented a possible embodiment of the different stops (11 and 35), of the ratchets (61, 62 and 63) and of the selective unlocking means which in this exemplary embodiment are schematically represented by levers (64) coupled thereto . As shown in the aforementioned figure 5 the stringers (1) have detectors at their rear end

(12) at the end of the race which, when activated by the rear arch (3), cause

engine stop (5). Once the canvas (4) has been deployed as shown in figure 4,

to return to the initial position, simply press on the control (53) the

button that causes the motors (5) and the respective tomilloc to turn without

end in the opposite direction. This drive causes the sequence of movements mentioned, but in reverse order: first the rear bow (3) advances to the intermediate ratchet, then the stringers are advanced to the previous position and then the forward arch (3) continues until

the initial position causing the drag of the remaining arches to the initial position and consequently the folding of the canvas.

As can be seen in the attached figures, the front end of the canvas (4) is arranged on the upper and front areas of the bridge

anterior (2) and is fixed to an area located at an intermediate height of said previous bridge. This lower bridge comprises in its upper zone tens "" res

front (7), operated by elastic means (71) and acting against the anterior-upper area of the canvas (4) tending to move it towards the area

anterior and establishing its tension.

As can be seen in Figure 6, said tensioners (7) are formed by plates mounted frontally on the upper end of the anterior bridge (2) by means of folding arms (72) on which the elastic means (71) act that they tend to keep the tensioners (7) in the deployed position.

In the exemplary embodiment shown in Figure 7 the stringers

(1) they are mounted on the opposite sides of the truck platform by means of two sets of cylinders (8), hydraulic or pneumatic, arranged transversely to the longitudinal axis of the truck and moving said stringers (1) between two extreme positions varying the

separation between them.

In this embodiment the stringers (1) maintain their possibility of longitudinal displacement, and are arranged by the cylinders (8) with a greater

separation during loading or unloading of the container, and with a smaller separation when the tarp (4) is in operative position,

facilitating a better fit with respect to the sides of the container.

Once the nature of the invention has been sufficiently described, as well as an example of a preferred embodiment, it is stated to the appropriate entities that the materials, shape, size and arrangement of the described elements may be modified, provided that this does not imply an alteration. of the essential features of the invention claimed in

continuation.

Claims (14)

1.-Covering system for hook or self-transport trucks,: it is, of the type with a covering canvas associated with a plurality of longitudinally movable support arches relative to the truck; characterized in that it comprises: two stringers mounted on the sides of the loading platform of the container with the possibility of longitudinal displacement between an anterior position in which they are arranged in correspondence with said laterals of the platform and a posterior position in which they protrude from said laterals towards the posterior area, the lower ends of the support arches of the covering canvas mounted with the possibility of longitudinal displacement relative to the stringers, between a folded position of the canvas, in the said arches that there are terraced houses in the front area of the stringers, and a position of unfolded from the canvas in which said arches are spaced apart from each other and distributed along the aforementioned stringers, an anterior bridge fixed to the anterior end of the stringers and to which the front end of the canvas is fixed, means of linear displacement of the lateral beams, together with the previous bridge, between the two anterior and posterior extreme positions, and of the canvas support arches between the positions of folding and unfolding the canvas and. -a command, equipped with buttons for the activation and control of the operation of the means of linear displacement. 2. System, according to claim 1, characterized in that each of the support arches of the canvas comprises two lower pillars, provided with guiding means with respect to the longitudinal stringers and a  upper section of inverted "U" configuration, whose lower ends are they are mounted telescopically on the respective lower pillars, for positioning at a variable height. 3. System, according to any of the preceding claims, characterized in that the successive arcs are related to each other by scissor mechanisms that are disposed in the canvas collection position and extended in the canvas deployment position.  4. System according to the preceding claims, characterized because the lateral stringers have stops for their fixation in the extreme, anterior and posterior positions, by means of a set of ratchets retention associated with the fixed structure of the platform.  5. System, according to any of the preceding claims, characterized in that the rear arch has a stop for retention temporary, by a set of ratchets, in an intermediate zone of its travel during folding and unfolding of the canvas. 6. System according to any of claims 4 and 5, characterized in that the sets of ratchets are arranged one on each side of the platform.  7. System according to claim 6, characterized in that each ratchet set comprises at least: a front ratchet (61), an intermediate ratchet (62) and a rear ratchet (63).  8. System according to claim 7 characterized in that the ratchets (61, 62, 63) are related to each other by means of selective unlocking. 9. System, according to any of the preceding claims, characterized in that the stringers have at their rear end limit switches that when activated by the rear arc cause the stop of the linear displacement means. 10. System according to any of the preceding claims. characterized in that the front end of the canvas is arranged on the zones upper and front of the previous bridge and is fixed to an area located at an intermediate height of said anterior bridge. 11. System, according to any of the preceding claims, characterized in that the anterior bridge comprises in its upper area front tensioners, actuated by elastic means and acting against the anterior-upper area of the canvas tending to move it towards the area before -jor, setting your tension. 12. System according to claim 7, characterized in that the tensioners (7) are formed by plates mounted frontally on the upper end of the anterior bridge by means of folding arms on which the elastic means act. 13.-System, according to any of the preceding claims, characterized in that the means of linear displacement of the lateral stringers and of the support arches of the canvas, are constituted by two motors fixed in the respective lateral stringers and that communicate a movement of turning, in the direction of forward or reverse to an endless screw mounted with the possibility of turning on the respective side member and which is coupled with a nut attached to the corresponding lower end of the rear arch. 14.-System. according to any of the preceding claims. characterized in that the stringers (1) are mounted on the opposite sides of the platform by means of two sets of cylinders (8). hydraulic or pneumatic, arranged transversely to the axis 5 longitudinal of the truck and moving said stringers (1) between two extreme positions, varying the separation between them.