FI77411B - SJAELVREGLERANDE LASTSPAENNINGSANORDNING. - Google Patents

Description

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This invention relates to a device for means of transport by which a load securing strap, rope or chain is tensioned around a load. Companies - Self-adjusting load tensioning device - Självreglerande last-spänningsanordning

It is previously known, for example, from the Finnish patent application no. 843339, Load tensioning device, Heikki Jokela, a tensioning mechanism that can relatively well remove loosening of the lashing strap, rope or chain without touching the device itself, even if the load is compressed due to driving vibration.

A disadvantage of the above mechanism is that the tightening force of the fastening strap, rope or chain decreases linearly from its originally set value when the maximum tightening distance allowed by the structure is utilized.

Said disadvantage is eliminated by a load-tightening device according to the present invention, the more detailed features of which appear from the following description of the invention and the claims.

The invention will now be described in more detail with reference to the accompanying figures, in which: Figure 1 is a perspective view of an embodiment of a load-tensioning device according to the invention, Figure 2 is an exploded section in the direction of arrows A to A in Figure 1, Figure 3 is an exploded view of a reel / ratchet shows perspectively another embodiment of the invention, Fig. 5 shows a section in the direction of arrows A-A in Fig. 4, Fig. 6 shows the device according to Fig. 4 in perspective with its main parts exploded.

In Fig. 1, the number 1 denotes a generally U-shaped base frame of the tensioning device, which is fixedly attached to the vehicle frame or subframe. At the outer ends of the U-branches of the basic body 1, a generally U-shaped adjusting body 3 is rotatably mounted at the shafts 2.

The outer ends of the U-arms of the adjusting body 3 are provided with holes so large that they can receive the winding / latch wheel assembly 4, which is shown exploded in Fig. 3.

The winding / sprocket assembly 4 comprises, as seen in Fig. 3, a first sprocket assembly 5 in which a shaft part 7 is fixedly attached to the sprocket 6, the distal end of which in Fig. 3 is further provided with a thinned portion 8. In Fig. 3 the proximal end portion of the assembly 5 is provided with a fixedly attached torsion piece. in the example shown there is a sleeve-like part with a rectangular hole, the hole being able to receive, for example, the torque pin of a ratchet wrench. The ratchet wheel 6 is provided with an axial hole 10 which receives the axial end portion 12 of the coil spring 11.

Figure 3 shows a trigger device 13 moving away from the assembly 5, which is a generally annular body with a cam portion 14 on the outer circumference of the ring. The device 13 is actuated by a lever 15 attached thereto.

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Fig. 3 shows on the right a second ratchet assembly 16, in which a tubular jacket part 18 is attached to the end face closer to the ratchet 17 in the figure, on the outer surface of which a hook-like hook 20 is attached. 8. Likewise, the ratchet wheel 17 has a hole 22 which receives the axial end 23 of the spring 11.

A latch 25 is mounted on the adjusting frame 3 at 24, which cooperates with the latch wheel 6. The latch portion 25 may be compressed by a spring (not shown) toward the circumference of the latch wheel 6. In a further example, the latch 25 is provided at its outer end with a roller or pin part 26 which, in the event of a trip, cooperates with the cam part 14 of the trigger device 13.

On the opposite side of the adjusting body 3, in the example shown, approximately symmetrically, a second latch portion 28 is mounted at 27, which cooperates with the latch wheel 17 and can be compressed by a spring (not shown) towards the circumference of the latch wheel 17. In the example shown, the latch portion 28 is provided with a release lever 29.

Attached to the base body 1 is a beam portion 30 attached to the lower / front surface of the closest U-branch in Fig. 1, the outer end of which has a third latch portion 32 mounted at 31 which cooperates with the latch 6 and can be compressed toward the rim of the latch 6. In the example shown, the end portion of the latch portion 32 is provided with a roller or pin portion 33 which, in the event of a trigger, cooperates with the cam portion 14 of the trigger device 13.

The clamping device of the base body 1 and the control frame 3 (Figure 1) is set to one or more rubber pads 34 which tend to 4 77411 säätorunkoa 3 to rotate in the direction of the arrow B of the basic body, of course, remains stationary. The limitation of the rotational movement can be, for example, the leaning of the sleeve part 9 on the upper surface of the beam part 30. The rubber pads 34 can, of course, be replaced by, for example, helical or frame springs or torsion springs arranged on the steps of the shaft 2, or other similar spring members.

Figure 2 shows a section A-A of Figure 1. It can be seen from the figure that the ratchet wheel 6 is further provided with a shoulder part 35 which acts as a bearing surface for the inner surface of the casing part 18. The diameters of the shaft 7, the spring 11 and the sheath part 18 are selected so that the spring 11 can perform a rotational / tightening movement in its state.

The operation of the device is as follows: The fastening chain 19 is thrown over the load and its other end, not shown in the figures, is fastened to the opposite side of the load. The chain is tightened e.g. suitably hand, after which the relevant link of the chain is threaded attachment hook 20. In the example. Ratchet wrench taken to circumvent the rotary member 9 (the associated components) of the arrow C (Figure 1) direction. When the mooring chain is still relatively loose, the following spring 11, and the second SAP 16 with pipyöräasennelma rotating the chain 19 of the diaper 18. The portion of the chain 19 of the tightening enough to stop the sleeve portion 18 (and latching member 17) movement, whereby the twisting direction of the arrow C, the continuation of the spring 11 is tensioned. Tightening is performed to the required tightness. 34 force the flexible mount such that the winding / pawl assembly 4 remains in this stage at all times parallel to the direction of the arrow B in the lowest position (e.g. the sleeve 9 rests on the upper surface of the beam member 30).

Now that the load is compressed due to the driving vibration, the chain 19 could loosen, but the action of the spring 11 pulls the "loose" immediately away, i.e. the sheath part 18 rotates "loose" around it. This

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The 5,77411 event, of course, causes a corresponding decrease in the torque of the spring 11 from its initial value.

During the driving event, the load, together with the vehicle body structures, also performs such movements that the momentary traction acting on the chain 19 can be very large, in any case significantly greater than the initial tension initially applied to it. During such an event, the entire adjusting body 3 now rotates about its axis 2 against the action of the rubber pads 34, whereby, the third latch part 32 is mounted only with respect to the base body 1, this latch part prevents movement of the latch tooth relative to the base body. Thus, the ratchet wheel 6 with its associated parts rotates relative to the adjusting body 3 so that the ratchet part 25 "locks" behind the next ratchet tooth, while performing the tightening movement of the spring 11. Now, when the instantaneous large force to the chain 19 ceases, the effect of pushing the rubber blocks in the direction of arrow 34, the control frame 3 in the direction B back to its lower position, wherein the latching member 32 'will fall "through the ratchet teeth while the next.

The described re-tightening event of the spring 11 can take place as many times as the sheath part 18 has space for the chain 19 to rotate, i.e. automatic re-tightening of the tensioning device is achieved so that the chain tension 19 always remains at the right desired level determined by suitable sizing of structures and spring constants. Vending machine re-tightening of the spring 11 does not occur when the rubber cushions 34 are not able to return the body 3 to control the direction of arrow B, parallel to the lower position.

When a vehicle and its load end destination and the load to be unloaded, twisted in the trip lever 15 of the arrow D (Figure 1) direction, the cam 14 (Figure 3) sections 26, 33 in effect, raise the latching member 25, 32 out of engagement with the ratchet wheel 6, 6 77411, and thus the spring 11 tension can be triggered by raising the irroitusvipua 29 in the direction of arrow E, whereby the latching member 28 is disconnected from contact with the ratchet wheel 17, a sheath 18 is free to rotate in such a direction that the chain 19 can be pulled from around the sleeve portion 18.

Figures 4, 5 and 6 show another embodiment of the invention, and in the following description the same reference numerals are used for the members performing the same function as above in connection with Figures 1, 2 and 3.

The primary difference in the past compared to the embodiment described now, that by bringing close to the ratchet 6, 17 to each other is made possible in a simple manner to "trigger" the attachment fastener 19 clamping and removal only one lever 15 using a lever 15 affects the direction of the arrow D (Figure 4) in the direction of pulling all to the three latch members 25, 28, 32, releasing them from their contact latch wheels. This is achieved in this embodiment so that now the central axis of the winding / ratchet assembly is the same as the axis 2 in Fig. 1. Furthermore, the ratchet part 32 can be placed in a well-protected place for the protection of the body parts of the device. Otherwise, the operation is completely identical to the application example previously described in connection with Figures 1, 2 and 3.

It is clear that the application examples now described can be combined and modified within the limits of the following claims, e.g. so that the application example shown in connection with Figures 1, 2 and 3 is also implemented so that the ratchet wheels 6, 17 are also located close to each other on the same side of the device. the sensitivity of the device can be guaranteed, i.e. the ratio of the bearing friction forces to the clamping force acting on the chain 19 itself should be as small as possible.

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Claims (2)

7741 1 A self-adjusting load tensioning device comprising a base body (1) and an adjusting body (3) connected thereto, comprising a latch / spring mechanism (6, 25; 17, 28 and 11) which removes the fastening strap, rope or chain (19). ) slackiness caused by possible compression of the load, characterized in that the adjusting body (3) with its latch / spring mechanisms (6, 25; 17, 28 and 11) can rotate about the axis (2) relative to the base body (1) against the action of the additional spring (34) on the fastening strap , a rope or chain (19), said rotation restoring the spring (11) to the originally set tension, the additional spring (34) returning the latch / spring mechanism (6, 25; 17, 28 and 11) to its original position after the load peak has been removed. Self-adjusting load tensioning device according to Claim 1, characterized in that the central axis and the axis of rotation (2) of the latch / spring mechanism (6, 25; 17, 28 and 11) coincide.