FR2550694A1 - STRAP TENSIONER WITH LATCH - Google Patents

Abstract

THE INVENTION RELATES TO A TENSIONER FOR A MOORING STRAP. IT HAS A LOCK 37, 38 INTENDED TO LOCK THE STRAP ARRIVING AT A DRUM 15 ON WHICH IT IS WINDING. THIS LOCK IS MOUNTED ON THE ANCHORING ELEMENT 10 OF THE TENSIONER AND IT CONTAINS A MOBILE JAW 38 INTENDED TO LOCK THE STRAP, TO PREVENT IT FROM BEING REMOVED FROM THE TENSIONER, AGAINST A FIXED JAW 37. THE MANEUVERING ARM 19 TENSIONER IS DESIGNED TO LOCK INTO THE MOBILE JAW BY TILTING BEYOND A PREDETERMINED POSITION FROM WHICH THE STRAP IS RELEASED BY THE LATCH SO THAT IT CAN BE REMOVED FROM THE TENSIONER. FIELD OF APPLICATION: MOORING LOADS ON VEHICLES, ETC.

Description

The invention relates to a strap tensioner of the type used for tensioning and

  attaching straps for mooring loads on trucks or the like, and which includes an element for securely anchoring the tensioner, an actuating arm pivotally mounted on the anchor, a strap drum centered on the pivot axis, at least one ratchet wheel connected to the drum for rotation with it, a locking pawl mounted on the anchor member 10 and a driving pawl mounted on the arm the two pawls being spring biased to engage with the ratchet wheel, the actuating arm being connected to the drum so as to be drivable by means of the drive ratchet and the ratchet wheel when this operating arm is tilted in a first direction, and being disengaged from the drum when it is tilted in the opposite direction, and a cam member, carried by the operating arm, being intended to actuate the locking pawl towards its p clearance, against the spring return force, when the operating arm is tilted in the drive direction, beyond a

  predetermined angular position.

  When using the webbing tensioner, the operating arm is pivoted in either direction to rotate the drum while the webbing is tightened around the load and is wound on the machine. If it is desired to release the strap for unloading, the operating arm is moved to or beyond said predetermined angular position to release the drum by moving the locking pawl to the release position. , using the cam element, so that the drum can

  turn freely while the strap is unwound.

  Webbing tensioners of the type to which the invention relates are shown and described in Swedish Patent Nos. 7712242-2 (Publication No. 408,695) and 7801911-1.

(Publication No. 412,557).

2550.694

  During the transportation of a load that is attached to a vehicle by means of straps tightened with webbing tensioners of the type described herein,

  it may be necessary, from time to time, to readjust the strap, since the load can become compressed as a result of the shaking occurring during the operation of the vehicle, which has the effect of relaxing the strap more or less. compromise the maintenance of the load on the vehicle.

  The strap must then be tightened in the present embodiments of webbing tensioners, the webbing is passed through a slot in the drum and is thus wound on the drum in the form of double layers, which means that the drum must receive a relatively large strap length and that, due to its limited dimensions, it rapidly reaches a state in which

  it is full and can no longer receive more strap, as is necessary for tightening.

  The operating arm is then moved to or beyond said predetermined angular position so that the drum is released and freely rotatable, and the blood can be removed from the drum.

  is drawn through the slot of the drum so as to be closely applied to the load, and is tightened by pivoting the operating arm in one direction and the other.

  However, this manipulation of the belt tensioner is not completely safe. When the load is being tapped, one or other part of this load may have reached a position such that it falls off the vehicle when the strap is released from the tensioner of the described way,

  which requires to take back the strap and to tighten it.

  The object of the invention is to provide an improvement to the strap tensioner so that it can be unwound from the drum when it has to be tightened again, and can be taken without having to release the load. , with the risks that entails. To achieve this objective, the strap tensioner according to the invention comprises a strap lock mounted on the anchoring element and comprising a spring-loaded movable clamping jaw, intended to block the strap in order to prevent its withdrawal from the strap. tensioner, and the operating arm is mounted to engage with the jaw by pivoting continuously in the driving direction beyond a second predetermined angular position to manipulate the jaw to a release position 10 while the strap is released from the lock to be able to

be removed from the tensioner.

  The invention will be described in more detail with reference to the accompanying drawings by way of non-limiting example and in which: Figure 1 is a perspective view of an embodiment of the strap tensioner according to the invention; Figure 2 is an enlarged cross section of the strap drum on which the strap is wound; Figure 3 is an enlarged cross-sectional view of the strap lock; Figure 4 is an elevation of the belt tensioner with the operating arm in the rest position; Figure 5 is an elevation of the belt tensioner with the operating arm in the angular position for releasing the drum; and FIG. 6 is an elevation of the belt tensioner whose operating arm is in the position

  angle in which he operates the strap lock.

  The strap tensioner shown comprises an anchoring element 10 which is made of aluminum and which forms two branches 11 and a web 12 connecting the branches at one end of the anchoring element, a transverse bar 13 extends between the branches and a strap section, intended to connect the anchoring element to the platform 35 or other on which the tensioner is to be used, can be attached to this bar The anchoring element 10 can, alternatively, be fixed by screws or others passing to

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  This drum member 15 is rotatably mounted in openings 14 between the ends of the anchoring element, and comprises two parts 16 which are connected to one another at a distance from each other. from each other, by means of transverse pins 17, so that the drum 15 has an axial slot 18 The strap to be tightened by means of the tensioner for mooring a load on the platform or the like can be inserted in this slot Then it is pulled through the slot 10 so as to be applied tightly against the load

  before being tightened with the tensioner.

  A maneuvering arm 19 is pivotably mounted at one end on the drum 15. This operating arm comprises two lateral elements 20 rigidly connected to each other by a riveted cross-piece 21 and a riveted handle 22 located at the other end. end of the operating arm, this handle being preferably

  covered with rubber to improve grip.

  Two sawtooth ratchet wheels 23 are mounted on the drum 15 and are disposed between the legs 11 of the anchoring element 10, these branches being disposed on the inside of the ratchet wheels, and the side members 20 19, these lateral elements being placed on the outer side of the ratchet wheels. These two ratchet wheels are connected to the

  drum 15 so as to rotate with it.

  A drive ratchet 24 is mounted on the

  Maneuvering arm 19 and locking pawl 25 are mounted on anchor 10 to cooperate with ratchet wheels 23.

  The drive ratchet 24 includes an element

  U-shaped flat for engaging with the ends of its branches with the two ratchet wheels 23.

  The drive pawl 24 is guided in longitudinal slots 26 formed in the lateral elements and, outside these elements, the drive pawl forms tabs 27 bent perpendicularly through

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  relative to the rest of the drive pawl 24, towards the edge of the elements 20 which is adjacent to the anchoring element 10 A tongue 28, formed by the driving pawl 24, passes through a support 29 located on the 5 crosspiece 21 and, between the support and the pawl 24 drive, a compression coil spring 30 surrounds the tongue 28 and recalls the pawl 24 drive to an engagement position with the ratchet wheels 23 A handle 31 formed by the drive pawl, passes through an opening 32 of the crosspiece 21 and can be grasped by two fingers of the hand holding the handle 22 to move the drive pawl 24 against the force of the spring 30 so as to from the

clear ratchet wheels 23.

  The locking pawl 25 also includes a U-shaped flat member and is movable and guided in slots 33 in the legs 11 of the anchoring member. A tab 34 of the locking pawl passes through a tab 35. folded from the core 12 and forms a support for a compression coil spring 36 which surrounds the tongue 34 and which recalls the locking pawl to snap into place.

with the ratchet wheels 23.

  The actuating arm 19 can assume a rest position in which it is adjacent to the anchoring element and extends along said element, as shown in FIG. 4, and the actuating arm must be locked in this position. while the retaining pawl is locked at the same time in the engaged position with the ratchet wheels 23 For this purpose, the tabs 27 are formed in hooks to engage with the locking pawl 25 of the latch. described in the patent

Swedish N 7804911-1 cited above.

  The branches 11 of the anchoring element 10 protrude on the side of the drum 15 opposite the crossbar 13, and a strap lock is mounted on the portion of the branches which protrudes. This lock comprises a fixed jaw 37 disposed between the branches 11 and forming a spacer between the parts protruding from the branches, and a pivoting jaw 38 which is fixedly connected to an axle 39 rotatably mounted in the branches, and which is recalled by a helical spring 40 forming two tails whose one, indicated at 41, is connected to the axis and the other, indicated at 42, bears against a lug 43 mounted on a branch 11, while the wound portion surrounds the axis 39 The spring 40 biases the swivel jaw 38 so as to rotate it clockwise, as shown in Fig. 3, to bring an abutment surface 44 of the jaw 38 against the fixed jaw 37. The contact surface 44 can be knurled, as represented, or else it can be configured in another way to establish a grip with the strap passing between the jaws, the strap being indicated at 45 in Fig. 3 For example, the clamping surface 44 may be formed wholly or partially of friction-enhancing material The swivel jaw 38 has a rounded surface 46 which facilitates the insertion of the strap between the two jaws. The strap can be pulled up and down, as shown in FIG. 3, i.e. that is, it can be advanced towards the drum 15 without the lock causing movement, since the pivoting jaw 38 is then pivoted away from the fixed jaw 37 against the restoring force of the

  However, the strap is effectively locked in the lock if it is pulled in the opposite direction, because the swivel jaw 38, biased by the spring 40, then bears against the fixed jaw 37, thus making a firm grip on the strap. .

  When the strap has been passed through the latch formed by the jaws 37 and 38, to the drum 15 and it has been passed through the slot 18 of the drum, and it must be tightened by means of the tensioner described, after being tightly applied against the load, the operating arm 19 is pivoted up and down as indicated by arrows in FIG. 1, the drive pawl then rotating the ratchet wheels 23 and therefore the drum 15 in the clockwise direction, in the orientation of Figure 1, while the operating arm 19 is pivoted upward, while the locking pawl 25 slides over the teeth of the The webbing is wound in two thicknesses on the drum 15 as shown in FIG. 2. When the arm 19 is pivoted downwards, the ratchet 25 10 interlock prevents the ratchet wheels 23 from turning while latching With the teeth of these wheels, while the driving ratchet 24 slides on the teeth without driving the ratchet wheels. When the strap is sufficiently tight, the operating arm 19 is locked in its rest position shown in FIG. 4, so that it can not pivot out of the tensioner if it is shaken, as may be the case when the tensioner is used to moor a load

on a vehicle.

  The operating arm 19 can take two distinct angular positions which are shown in FIGS. 5 and 6, respectively It can be immobilized in these angular positions by means of the pawl 24 for driving, by the anchoring element 10 which has 25 notches 47 and 48 by means of which the driving pawl can engage with this anchoring element When the driving pawl is engaged with the notch 47, the operating arm 19 is in the angular position of FIG. 5 with respect to the anchoring element 10, the two cam members 49, formed by the edges of the lateral elements 20, abutting against the ends of the locking pawl 25 protruding on the outer side of the branches 11 of the anchoring element 10, so as to maintain the locking pawl in a position disengaged from the ratchet gearwheels 23 of the drum 15, against the restoring force of the compression spring 36. Cam elements 49 have a ramp 50 so that the locking pawl 25 slips on the cam member 49 when the drive pawl 24 is in a position close to the notches 47 and is resiliently engages in these notches under the return force of the spring 30, so as to be stopped in the position of Figure 5 The notches 47 and the notches 48 have a depth such that the ratchet 24 drive, when is engaged with them, is totally clear ratchet wheels 23 and that, consequently, the drum is released so as to rotate in the angular position of the operating arm 19 shown in Figure 5, which allows to unwind the The strap of the drum when the tensioner is in this adjustment position may be desired to do so to tighten the strap by means of the tensioner However, in the position of Figure 5, the strap is held by the lock com taking the jaws 37 and 38, so that the load is still tied up by the strap When the strap has been unwound from the drum 15, but still passes into the slot 18, it can be tightened as previously described, by pivoting the operating arm 19 in one direction and the other to wind the strap on

the drum 15.

  To release the moored load, the engagement between the strap lock and the strap must be eliminated and this is achieved by further pivoting of the actuating arm in a clockwise direction, the position of the FIG. 5 to that of FIG. 3, after the driving pawl 24 has been maneuvered against the force of its return spring. The cam members 49 are configured so that the locking pawl 25 during this pivoting movement remains in the release position A side member 20 of the operating arm 19 has a projection 51 which is intended to bear against an arm 52 fixedly connected to the axis 39 and located on the outside of a branch 11 of the element Anchor 10 When the element 19 maneuver arrives

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  in the angular position defined by the engagement of the driving pawl 24 with the notch 48, as shown in FIG. 6, the pivoting jaw 38 is tilted in the opposite direction of that of the clockwise, as shown in FIG. 3, against the restoring force of the spring 40, because of the engagement of the projection 51 with the arm 52, so that the clamping surface 44 of the pivoting jaw 38 moves away from the strap 45 and therefore the latter can freely switch to

  through the strap lock, between the jaws 37 and 38.

  The strap can then be removed from the load so that

the latter is released.

  In the strap lock, the movement of the pivoting jaw 38 under the restoring force of the spring is stopped by contacting the jaw with the jaw 37, but

  it is also possible to provide a separate stop for the swivel jaw so that it is stopped in a position close to the fixed jaw, but however without touching the latter.

  The insertion of the strap through the latch is then facilitated.

  The functional cooperation of the operating arm 19 and the arm 52 can be obtained in another way than that shown here, for example by means of toothed sectors.

  engaged by the pivoting jaw and the actuating arm, respectively.

  It goes without saying that many modifications can be made to the strap tensioner described and

  shown without departing from the scope of the invention.

2550694 t

Claims (5)

  A webbing tensioner comprising an element (10) for firmly anchoring the tensioner, a maneuvering arm (19) pivotally mounted on the anchoring element (10), a centering webbing drum (15). on the pivot axis, at least one ratchet wheel (23) connected to the drum for rotation with it, a locking pawl (25) mounted on the anchor member (10), and a pawl (24) on the operating arm 10 (19), both of which are spring-loaded to engage with the ratchet wheel (23), the actuating arm (19) being connected to the drum (15). ) so as to drive it by means of the driving pawl (24) and the ratchet wheel, when it pivots in a first direction, and being disengaged from the drum (15) when it pivots in opposite direction, and a cam member (49), carried by the operating arm, for causing the locking pawl to disengage with the force of the return spring, when the actuating arm pivots in the direction of the drive, beyond a predetermined angular position, the tensioner being characterized in that it comprises a latch (37, 38). intended for the strap arriving at the drum (15), this lock being carried by the anchoring element (10) and comprising a movable spring-loaded clamping jaw (38) intended to block the strap to prevent its withdrawal from the tensioner, and in that the operating arm (19) is mounted to engage with the jaw as a result of prolonged pivoting movement in the drive direction, beyond one second. predetermined angular position, in order to bring the bit into a release position while releasing the strap   lock so that it can be removed from the tensioner.   2 belt tensioner according to claim 1, characterized in that the operating arm (19) is pivotable in different positions relative to the anchoring element (10), these positions corresponding to said angular positions.   3 belt tensioner according to claim characterized in that the arm (19) of maneuver can be blocked in said angular positions, relative to the anchoring element (10 C).   4 webbing tensioner according to claim 3, characterized in that the pawl (21) for driving is arranged to engage with notches (47, 48) in the anchoring element (10), in said angular positions, while blocking the operating arm (19) on the anchoring element (10), and can   be manually operated to release the operating arm.   A belt tensioner according to claim 1, characterized in that the movable jaw (38) is pivotable and spring-biased so as to be pivotably movable towards and away from a fixed jaw (37).   mounts to cooperate with this movable jaw.   6 belt tensioner according to claim, characterized in that the swivel jaw (38) comprises a member (52) to be actuated by the arm (19) 20 maneuver to tilt the swivel jaw to a release position when the arm maneuver is brought   by pivoting in said second angular position.