WO2022029448A1 - Load strap for compactible loads - Google Patents
Load strap for compactible loads Download PDFInfo
- Publication number
- WO2022029448A1 WO2022029448A1 PCT/GB2021/052044 GB2021052044W WO2022029448A1 WO 2022029448 A1 WO2022029448 A1 WO 2022029448A1 GB 2021052044 W GB2021052044 W GB 2021052044W WO 2022029448 A1 WO2022029448 A1 WO 2022029448A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- load
- webbing
- compensator
- load strap
- fixed point
- Prior art date
Links
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005056 compaction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P7/00—Securing or covering of load on vehicles
- B60P7/06—Securing of load
- B60P7/08—Securing to the vehicle floor or sides
- B60P7/0823—Straps; Tighteners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P7/00—Securing or covering of load on vehicles
- B60P7/06—Securing of load
- B60P7/08—Securing to the vehicle floor or sides
- B60P7/0823—Straps; Tighteners
- B60P7/0861—Measuring or identifying the tension in the securing element
Definitions
- the present invention relates to the technical field of load straps for securing loads, especially compactible loads.
- Load straps are in common usage to secure loads to the load deck of a vehicle. They commonly take the form of a ratchet strap.
- the ratchet strap comprises a first, substantially inelastic flexible webbing part which is coiled around a reel supported in a chassis of a ratchet mechanism.
- the reel is rotatable on an axis.
- a ratchet drive engages the reel and is further engaged by a lever. Reciprocal operation of the lever with the ratchet engaged causes the reel to rotate in a direction to reel the webbing onto the reel.
- a release mechanism allows the reel to be released so that the first webbing part can be unwound.
- a second inelastic flexible webbing part is usually attached to an end of the ratchet mechanism chassis opposite the first webbing part. It is common for the second end to be of adjustable length by means of a buckle, in order to trim the strap for use on a range of load sizes, however once trimmed there is usually no capacity to tighten the second webbing. Hooks or loops are mounted to each end of the webbing parts remote from the ratchet drive to facilitate attachment to fastening eyes or other mounting structures, mounted into the load bed of the vehicle or walls of the vehicle. Once in place the strap can be tightened over the load to press it against the load deck and thus prevent the load from shifting due to the motion of the vehicle.
- Load straps are also used to attach loads to vehicle roof racks and roof bars. While ratchet straps can be used for this purpose the smaller lighter and more compact nature of such loads tends to encourage the use of straps known as cam straps. These are usually a single length of flexible substantially inelastic webbing with a cam buckle secured at one end. The strap is most commonly used by threading the webbing around the roof bars or elements of the roof rack and over the load before returning the free end of the webbing to the buckle. The free end is threaded through the buckle to form an endless loop around the load. By pulling against the free end of the webbing the loop can be tightened to secure the load.
- the cam mechanism of the buckle prevents the free end being drawn back by the tension applied to the webbing loop, by the load, until released by the user.
- the cam buckle conventionally has a release tab designed to facilitate rotating the cam out of engagement with the webbing in order to release the webbing.
- a load strap of either type is very effective.
- compactible loads of various types for example sacks of granular materials in flexible intermediate bulk containers (FIBC) bags (sometimes known as big bags or bulk bags).
- FIBC bags sometimes known as big bags or bulk bags.
- Such bags are commonly of generally rectangular form and have a maximum capacity of around 800-1 OOOItrs and are commonly used to transport loose granular materials ranging from foodstuffs comprising granular elements, to building materials such as sand and gravel.
- FIBC flexible intermediate bulk containers
- Such bags are commonly of generally rectangular form and have a maximum capacity of around 800-1 OOOItrs and are commonly used to transport loose granular materials ranging from foodstuffs comprising granular elements, to building materials such as sand and gravel.
- a load strap for securing compactible loads comprising: a compensator having: a first substantially inelastic flexible webbing part, a tension spring having a first end and a second end, a first connector to connect the first end to a first point of the first webbing part, and a second connector to connect the second end to a second point of the first webbing part spaced a span from the first webbing part; the span between the first and second points is substantially longer than the length of the spring so that the span of webbing forms a slack loop when no tension is applied to the webbing and prevents the extension spring from extending beyond the elastic limit of the extension spring when tension is applied to the first webbing part.
- the tension spring may be provided by any suitable elastic member, including at least a coil spring and an elastomeric bungee cord.
- the coil spring will usually be selected from heavy duty applications capable of securing heavy loads such as the FIBC bags which commonly contain up to 1000kg of material.
- Elastomeric bungee cord may serve as the tension spring where lower load rated duties are specified.
- a benefit of the load strap is that tension is only applied to the strap after it is secured to the load points and only over a short span of the webbing, consequently any failure of any component of the strap will dissipate energy from the spring minimising the risk of injury to the user.
- the spring and compensator webbing also serve as a load strap tension indicator.
- the tension applied to the strap will be proportionate to the extension of the span, at least until the span is maximally extended. This can help to obviate the application of excessive tension to a load strap with the potential of damage to the load, the strap or the vehicle securing points.
- the first compensator webbing is secured at one end to a ratchet mechanism.
- a second compensator webbing may then be secured to a reel of the ratchet mechanism.
- the ends of each of the first and second compensator webbings remote from the ratchet mechanism are provided with securing fixtures, which may be in the form of hooks, and/or loops adapted to secure to secure points in a vehicle.
- the first webbing part may be provided with a cam locking buckle at one end in order to achieve tension by securing a free end of the webbing part to the buckle.
- more than one compensator may be provided in the first webbing part.
- one or more compensators may be provided in the second webbing part.
- Figure 1 is an isometric NW view of a flatbed truck with a load comprising three FIBC bags secured by means of ratchet straps;
- Figure 2 is an enlarged isometric NW view of a ratchet strap under maximum tension
- Figure 3 is a view of the ratchet strap of figure 2 relieved of tension
- Figure 4 is a plan view of the ratchet strap of figure 3;
- Figure 5 is a plan view of the ratchet strap of figure 2 and
- Figure 6 is an isometric NW view of a cam strap.
- a first embodiment of a load strap for securing compactible loads comprises a compensator 1 having: a first substantially inelastic flexible webbing part 2.
- a tension spring 3 is provided by a coil spring having a first end 4 and a second end 5.
- a first connector 6 to connect the first end 4 to a first fix point 7 of the first webbing part, and a second connector 8 to connect the second end 5 to a second fix point 9 of the first webbing part.
- a hook formation is provided at each of the first and second ends 4, 5 of the tension spring to engage with the corresponding connector.
- the span “S” is substantially the length of the first webbing part between the first and second fix points 7 and 9.
- Each connector is provided by a substantially triangular stiff wire loop.
- the connector loop 6 is threaded into a sleeve formed transversely in the webbing at the first fix point 7.
- the connector loop 8 is threaded into a transverse sleeve formed into the webbing at the second fix point 9.
- the tension coil spring 3 is ended at 4 and 5 with hooks which hook into the connector loops 6 and 8.
- the span S of webbing part 2 between the first and second points 7, 9 is substantially longer than the unstressed length of the spring “R” so that the span of webbing forms a slack loop when no tension is applied to the webbing and prevents the tension spring from extending beyond a predetermined limit.
- the value of S is selected to ensure that when the tension spring is extended to the maximum extension allowed by the webbing part, as shown in figures 2 and 5 the tension spring cannot be extended beyond the elastic limit for the specified tension spring when tension is applied to the load strap.
- a connector web part 10 is connected to one end of a ratchet reel 11 of conventional design.
- the length of the connector web may be adjustable by means of a buckle (not shown) which can facilitate connection to the ratchet reel.
- a further length of webbing 12 extends from the fixed point 9 to a hook 13.
- a reel webbing part 14 is wound on to a reel of the ratchet drive 13.
- the opposite end of the webbing part is provided with a hook 15.
- the hook 15 can be secured to a load point 16 on the cargo bed of a truck.
- the webbing part 12 can then be extended sufficiently to be fed over the FIBC bags of sand loaded onto the cargo bed. These would be of much less regular shape than illustrated as the bags are flexible.
- Tension is applied to the strap by operating the ratchet lever 17 of the ratchet mechanism in the usual way until the tension extends the spring 3 to the limit set by the span of the compensator web 2. If the load shifts and compacts relieving the tension on the load strap the spring acts to draw the strap taught.
- FIG. 6 illustrates the compensator 1 deployed in a load strap in the form of a cam strap.
- the compensator is identical to the compensator of the previous embodiment but the fix points 7 and 9 are attached to a continuous webbing loop 16.
- a cam buckle 17 is attached to one end of the loop to capture the unadorned opposite free end of the webbing 16.
- the cam strap - load strap is generally more useful where lighter and smaller loads are to be secured and sufficient tension can be applied by pulling on the free end of the webbing.
- the operation of the compensator 1 is otherwise similar to the previous embodiment where tension is applied manually to the strap until the tension spring 3 is fully extended to secure the load. If the load packs the tension on the spring 3 causes the spring to contract and compensate for the compaction of the load while maintaining load security.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2303192.5A GB2613496A (en) | 2020-08-07 | 2021-08-06 | Load strap for compactible loads |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB2012301.4A GB202012301D0 (en) | 2020-08-07 | 2020-08-07 | Load strap for compactible loads |
GB2012301.4 | 2020-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022029448A1 true WO2022029448A1 (en) | 2022-02-10 |
Family
ID=72519908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2021/052044 WO2022029448A1 (en) | 2020-08-07 | 2021-08-06 | Load strap for compactible loads |
Country Status (2)
Country | Link |
---|---|
GB (2) | GB202012301D0 (en) |
WO (1) | WO2022029448A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2007221854A1 (en) * | 2006-10-05 | 2008-04-24 | Shaun Richard Reinders | Holding strap |
DE102009050489A1 (en) * | 2009-10-23 | 2011-04-28 | Paul Neumann | Tension belt for motor vehicles, has intermediate piece and one or multiple springs, where pretensioning is attained at intermediate piece, which prevents loosening of tension belt by shaking clamped product |
US9376050B1 (en) * | 2015-05-15 | 2016-06-28 | Fgill Enterprises, L.L.C. | Resilient strap member with side rail assembly |
-
2020
- 2020-08-07 GB GBGB2012301.4A patent/GB202012301D0/en not_active Ceased
-
2021
- 2021-08-06 GB GB2303192.5A patent/GB2613496A/en active Pending
- 2021-08-06 WO PCT/GB2021/052044 patent/WO2022029448A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2007221854A1 (en) * | 2006-10-05 | 2008-04-24 | Shaun Richard Reinders | Holding strap |
DE102009050489A1 (en) * | 2009-10-23 | 2011-04-28 | Paul Neumann | Tension belt for motor vehicles, has intermediate piece and one or multiple springs, where pretensioning is attained at intermediate piece, which prevents loosening of tension belt by shaking clamped product |
US9376050B1 (en) * | 2015-05-15 | 2016-06-28 | Fgill Enterprises, L.L.C. | Resilient strap member with side rail assembly |
Also Published As
Publication number | Publication date |
---|---|
GB202012301D0 (en) | 2020-09-23 |
GB202303192D0 (en) | 2023-04-19 |
GB2613496A (en) | 2023-06-07 |
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