FI73634C - Roll-up and tensioning device for load-carrying straps. - Google Patents

Description

73634

The load must be k xhna.n k i · .aan :. s- k ir is t-.vs lai to keilla o; '.: vi boxin' taruc 11rαa crashing- '' a tightening la: tv ·; tu;: en tyvppi n Lä hi! ', na i ••• a car 5 used to hold in place the vehicle and the load carried,' is known various types of: irstyu equipment or so-called grief tensioners, and are used primarily in the truck i.es especially in the form of logs in the forest s act ti ·, i t.a such as logs and massed k: avu rau. ä>. tm.nnt.n ainnoja 'ai. ketju pi,' nidekään kir 1 etcv.tyi: d tie ky 1. kä v · omalla, ykta o: · te 11 ä L s 1 un irral] isona ui 'tvi.a tukk-yo tutoarus' ·; aio: t ''! VO: t..a during the trip.

Swedish patents 321 920, 740 19 9-2 15 and 800 3014-1 disclose clamping devices of this type. These and known tensioning devices for similar purposes in food have certain eo points. For example, hydraulic tensioning devices for chains operate with a limited tensioning head, which forms only a portion of the entire length of the chain. Therefore, after the lowest ;, ir.i.stys has occurred in connection with my load, the remaining tightening length may not be sufficient to compensate for the landings in the load that recede during the voyage. 25 The driver must therefore stop the vehicle after a relatively short distance and apply each tightening time to ensure that a satisfactory stiffening can take place. However, since this necessary safety measure is time consuming 9a it involves effort, vehicle driving and can be left to be done; t resulting in serious accident risks.

Also, when the chains are to be removed from the hood, it is time consuming to manually assemble the chains into special storage areas: the largest, because the tensioning devices cannot work. ; 1 gets a · veto; a; .1; ti s-n £ i size ke t j uoi t uude 1 lo. During journey 2 73634, an unladen vehicle also runs the risk of chains being thrown out of storage boxes and becoming a danger in traffic.

For example, according to Swedish patent 800 3014-1, the chain is kept tensioned only by means of a piston-cylinder device acting on a pressure medium. In the absence of any other tightening or locking device, a leak in the hydraulic system can cause a dangerous loss of tightening force.

10 SE Publication 413 182 describes a device comprising a pressurized fluid cylinder which is affected by the elastic movements of a truck. This feeds the pressure vessel, which in turn acts on the hydraulic actuators with which the load-bearing chains or belts can be retightened. The device is limited to providing post-tensioning of the chain or belt only when the vehicle is in motion, as the elastic system does not work and therefore does not charge the pressure tank when the vehicle is stationary. Any other extraction, retraction or tightening of the chain or belt from the load etc. must be performed by hand. The proposed post-tensioning actuators will thus cause resistance due to the braking effect of the pressurized fluid system, which makes manual operations heavy and laborious. In addition, there is a safety risk associated with the device, as there is a Releasable Retainer for pulling the chain or strap, which is easily left unattached. In this case, there is no protection against loss of tightening force due to leakage or other failure in the pressure fluid system.

It is an object of the present invention to provide a winding and tensioning device for a belt, which device has considerable advantages over known tensioning devices. The load-bearing belt can thus be wound / tightened by means of the drive and the belt drum, using its entire length or a selectable part of its length as the winding and tightening distance. This, on the other hand, provides an unlimited possibility of compensation during the journey in the load

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7 3 6 3 4 occurring depressive slit, on the other hand, a conveniently performed belt rewinding and storage on the drum when not in use. The clutch device is configured so that actuation of the drive simultaneously triggers engagement of the rear latch 5, which latch secures the belts in the retracted position, while driving failure occurs, while disengagement of the drive simultaneously causes release of the latch so that the belt can be manually pulled. obstruction and without the drum being heavily damaged due to the drive being introduced. The traction provided by the drive device can also be used in the "" obvious stage of storing the belt on the drum to pull it out to prevent water formation. Said latch prevents the belt from being inadvertently ejected after storage on the drum. The latch is equipped with a silent The winding and tightening device is designed in such a way that the parts belonging to the drive, coupling and locking mechanism 20 are well integrated and protected, in addition to which the device becomes space-saving These advantages are obtained with the device according to the invention as defined in the claims.

The invention is described in more detail below with reference to the accompanying drawings. Of these, Fig. 1 shows a timber-laden vehicle equipped with a plurality of devices according to the invention, Fig. 2 shows a side view of the device with the belt drum shown without a belt attached to it, Fig. 3 shows a sectional perspective view of the device, Fig. 4 a detail view partly taken along line AA, Fig. 5 according to line BB in Figure 4.

35 In the drawings, reference numeral 1 denotes a vehicle with a load 2. Reference numeral 3 denotes the device according to the invention 7 3 6 3 4 in its entirety. This is provided with a belt 4 and further comprises a housing 5 with a hole 6 for attaching the device to the drive. The housing is provided with a fixed shaft 7 on which a sleeve drum 8 is rotatably mounted. The drum has an outer end 9 fixed to the drum by screws 10. The screw 11 passing through the center of the outer end and inside the shaft 7 together with the bearing spacer 12 forms a longitudinal bearing which holds the drum on the shaft. The screw 10 13 also passes through the outer end 9 and passes immediately outside the drum as well as inside the inner end 14 and for attaching the belt 4 to the drum. The circumference of the inner end 14 is provided with a flange 15. The flange has an internal gear 16 which is in contact with the drive wheel or gear 17. The gear is rotatably mounted and axially displaceable on a shaft 18 extending a short distance out of a fluid motor 19 mounted on the housing 5. The gear 17 is provided at one end with a toothed coupling half 20 which can be gripped and disengaged 20 by axial displacement of the wheel. 18 olevar. with a corresponding clutch half 21, whereby the gear wheel is brought in as the shaft 18 rotates or is disengaged therefrom, respectively. The gear 17 is actuated in the displacement direction which disengages it by compression by a spring 22 and in the disengagement direction 25 by a clutch device 23. This comprises a joystick 24 for rotating the shaft 25. The shaft is provided with a first laterally projecting member, which may be in the form of a guide pin 26 passed transversely through the shaft. The horizontal arm 27 has a part 28 which cooperates with the guide pin 30 26 along the direction of its movement when the shaft is rotated, and which part has a pressing surface for the pin extending towards the plane of said trajectory. The horizontal arm 27 is loaded by a spring 29 which presses against the guide pin 26 pivotally mounted on the support member 30. A portion of the end 28 at the opposite end 35 is, the horizontal arm is attached to the pin 31 projecting from the gear 17 and rotating relative to the horizontal arm.

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The shaft 25 also has a second projecting member, which may be in the form of a guide pin 32 passed transversely through the shaft. The locking hook 33 is provided with a groove with two side walls 34, 35 which, leaving a space, surround the guide pin 32 on both sides thereof, as a result of which the locking hook can be actuated towards or away from the gear 16 when rotating the shaft 25. The locking hook is mounted on the steps 25 and is pivotable in this respect. Attached to the locking hook is a bent spring member 10 36 which, when the locking hook is turned to the gripping position sa with the gear 16, presses against the plate-shaped end 37. The head 37 is formed of a non-metallic, relatively soft material that reduces both sound generation and wear upon contact with the gear during operation of the gear.

For the engagement position adjusted as a position holder, a plate 38 is attached to the shaft 25 with two spaced holes 39 cooperating with the spring-loaded ball latch 40, 41 when the joystick 24 is moved to one end position a or b, respectively.

The housing 5 has an end 42 with a low flange 43 which surrounds the end 15 of the flange 15 of the inner drum end 14 facing the housing. End of the housing to approximately half the silicon-ester 25 around the flange 42 is related to elevated side walls 44, 45 which cover the entire width of the belt drum 8 to the outer end 9.

A sleeve 46 is articulated to the side wall 44 of the housing, through which the belt 4 is passed and which controls the winding of the belt 30 and acts as a scraper to keep it clean. The outer end of the belt has a fastening loop 46a.

When installing several devices according to the invention in a vehicle, the liquid motor of the devices is connected to a liquid pump 47 provided with a pressurized liquid tank by means of a control member 48 suitably located in the cabin of the vehicle 35.

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In the case of a vehicle 1 provided with several winding and tightening devices 3 according to the invention, the mode of operation is essentially as follows:

When the vehicle is unloaded, the belts 4 are fully 5 wound on the belt drums 8. The liquid pump 47 is switched off by means of a control member 48, as a result of which the liquid motors 19 are not running. However, the joystick 24 of the clutch device of each device is in the struck position, whereby, as will be described in more detail 10 minutes later, the locking hook 33 engages the belt-drum end gear 16 and forms a rear latch which prevents unwanted unwinding of the belt from its respective drums.

When the belt 4 is to be used to secure the loads, each belt drum 15 is disengaged by its control rod 24, whereby both the drive from the fluid motor 19 and the locking hook 33 are disengaged. The belts can now be pulled from the freely rotating drums and thrown over the load on the opposite side of the vehicle, where they are fastened to their fastening members (not shown) by means of their fastening loops 20 46a. The drive switch is then switched on again, which also activates said rear latch, and through the rotation of the belt drums via the fluid motors 19, the belts are wound on the drums 25 as far as necessary to extend them around the load. In order to cause the belts to rewind, either the fluid pump 47 can be started first and then the drive force from the fluid motor to the corresponding belt drum can be actuated by moving each rod 24 separately or by first moving all the joysticks to the operating position and then starting the fluid pump.

In the event of landings during the load, the belts can be retightened afterwards without length limitation and thus without the need to stop the vehicle in order to readjust the tensioning devices.

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Furthermore, the locking hook 33 t> constantly sucks in the rear hook, which ensures that the belt does not come off the drum and the holding force is maintained if a pressure drop occurs in the fluid system.

The operating procedure for the operation and deactivation of the belt drum 8 in detail is as follows: The drive is switched by moving the joystick 24 to position a as shown in Fig. 5. In this case, the guide pin 26 on the shaft 25 is rotated as it presses against the part 28 of the horizontal arm 27 which extends towards the trajectory and compresses it outwards-10, whereby the arm turns around the support 30 and on its opposite end presses in the gear 17 on the outgoing shaft 18 of the fluid motor. so that the gear clutch half 20 of the gear engages the shaft clutch half 21. The gear is thus engaged in the rotation of the shaft of the motor 15 and drives the belt drum 8 via a gear 16 at the end 14 of the drum.

At the same time, the guide pin 32 is also rotated and then the side wall 34 of the groove engages the locking hook 33, so that the locking hook is turned over in solid lines towards the position shown in Fig. 5. When the locking hook has come close to this position, the rotation of the guide pin ceases, but the locking hook drops for the rest of the distance due to its own weight, so that it is free to move due to the empty space between the guide pin and the groove side walls 34, 35. In this case, the end 37 of the spring element 36 also comes into contact with the tooth track 16. As the gear moves clockwise as shown in Figure 5, each tooth, as it passes the head 37, causes traction therein, so that in addition to raising it, the tooth engages a short distance 30 hours clockwise and then, when the next tooth passes, turns back by the spring force 36. . The pulling movements of the head 37 are transmitted by means of a spring member 36 to lifting movements at the inlet end of the locking hook 33, so that the hook passing through each toothbrush is lifted over it, so that it then pivots down into the following tooth gap. The locking hook ΊΖ 73634 ka thus operates without metal contact with the teeth, as a result of which, on the one hand, wear is reduced and, on the other hand, the loud banging sound that would otherwise be generated when dragging over the teeth is eliminated. The head 37 is a non-metallic, 5 relatively soft material with wear-reducing properties and which produces a small sound. Said lifting movement of the locking hook 33 is immediately replaced by a hook-lowering movement to the locking position between the two teeth, as soon as the movement of the tooth in the counterclockwise direction is started and enters the head 37 in this direction. The rear latch therefore operates on the one hand quietly and without wear, on the other hand with certainty for an eye-catching locking effect.

The drive is disengaged by moving the joystick 24 to the dry position 5 b. Thus, rotation of the guide pin 26 against the outer end of the engaging horizontal arm portion 28 causes the horizontal arm to pivot freely under the pressure of the spring 22 against the gear 17 and allow it to be pushed. outwardly to the shaft 20 Lille 18 so that the nail clutch halves 20, 21 are separated from each other. At the same time, the guide pin 32 is rotated and engages the locking hook 33 in the side wall 35 of the groove, so that it pivots with the broken lines to the position marked in Fig. 5. The gear 16 is thus disengaged from both the locking hook 25 and the fluid motor 19, as a result of which the belt drum 8 can rotate freely to pull the belt 4 out of it.

In the end positions a and b of the joystick 24, the adjusted engagement positions are ensured so that the spring 40 keeps the locking ball 41 depressed in the hole 39 corresponding to the corresponding position in the plate 38.

According to the described application example, a simple, space-saving and reliable winding and tensioning device is obtained, which has a well-built-in and protected mechanism and allows quick and easy handling of load-bearing tensioning belts with a high degree of safety.

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By selecting a suitable fluid motor, preferably a hydraulic motor, and a suitable ratio of gear to transmission 16, 17, on the one hand a reasonably fast belt winding speed is obtained when the counter force does not affect the belt, on the other hand good traction 5 at low speed, moon tightening load should take place. In the prototype device made according to the invention, an attraction of about 4000 N was obtained at a working pressure of 12.5 MPa.

The invention is not limited to the embodiment example shown, but modifications of the embodiment are possible within the scope of what is defined in the claims.

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Claims (6)

1. A reel and tensioning device for a belt intended to hold a cargo transported on a vehicle, for example elongated articles such as logs, pulpwood, etc., which comprises a rotatable belt drum (8) and a drum-driven gearbox ( 16,17), the drive (17) of which is displaced by axial displacement by means of a clutch coupling, etc. (20, 21) tiltable and frictional coupling to the output shaft (18) of a drive motor (19), characterized in that an operating shaft (25) which can be actuated by a movement connected thereto and between the two end positions (a) , b) manually adjustable lever or the like (24), is arranged so as to provide axial displacement of the gear (17) via movement-transfer means (27-31) and to actuate a latch (33), in such a way that when the lever is adjusted or the like (24) to one end position (a) of the drive (17) via the clockwise coupling, etc. (20, 21), the motor shaft (18) and the latch (33) are engaged at the same time as engaging the one gear (16) of the gear unit and as a reverse latch prevents movement thereof in the opposite direction to the driving direction, while in the shifting of the lever or the like. the second end position (b) is turned (17) detached from the motor shaft (18) and the latch (33) is simultaneously disengaged with the gear path (16). 2. Device according to claim 1, characterized in that the actuating shaft (25) is arranged to perform a pivoting movement and is provided with projecting means (26,32) which act on the movement transfer means (27-31) at the rotation of the shaft, respectively. latch (33). 3. Device according to claim 2, characterized in that the movement transmitting means is supported by a pivotally mounted support arm (27) mounted on a support (30), which at one end abuts one of the protrusions.