NZ616772B2 - Load-strapping device - Google Patents
Load-strapping device Download PDFInfo
- Publication number
- NZ616772B2 NZ616772B2 NZ616772A NZ61677212A NZ616772B2 NZ 616772 B2 NZ616772 B2 NZ 616772B2 NZ 616772 A NZ616772 A NZ 616772A NZ 61677212 A NZ61677212 A NZ 61677212A NZ 616772 B2 NZ616772 B2 NZ 616772B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- spindle
- load
- strap
- strapping device
- pivotable
- Prior art date
Links
- 230000003578 releasing Effects 0.000 description 8
- 238000004804 winding Methods 0.000 description 3
- 210000000538 Tail Anatomy 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000725 suspension Substances 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
-
- 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
- B60P7/083—Tensioning by repetetive movement of an actuating member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/21—Strap tighteners
- Y10T24/2175—Cargo tie down
Abstract
load-strapping device for straps used for securing a load on a vehicle comprises mutually pivotable frame parts (1, 2) which by their movement can rotate a two part spindle (3) in one direction (19) provided by pawls (10, 11) and a ratchet wheel (9). The spindle (3) is composed by a base part (12) and a pivotable part (13) that may pivot between a closed position while abutting on a stop and an open position where the pivotable part (13) extends at an angle relative to the closed position. Easy mounting of the strap on the spindle is possible as the small member (13) is pivoted to the open position, avoiding threading the end of the strap in the spindle. Also, more easy and time-saving release of the strap is possible as the unwinding rotation of the spindle (3) provides that the small member (13) automatically moves to the open position by the action of the strap. and a pivotable part (13) that may pivot between a closed position while abutting on a stop and an open position where the pivotable part (13) extends at an angle relative to the closed position. Easy mounting of the strap on the spindle is possible as the small member (13) is pivoted to the open position, avoiding threading the end of the strap in the spindle. Also, more easy and time-saving release of the strap is possible as the unwinding rotation of the spindle (3) provides that the small member (13) automatically moves to the open position by the action of the strap.
Description
LOAD-STRAPPING DEVICE
Field of Invention
The invention concerns a load-strapping device of the kind used for securing load to a
vehicle, particularly trailers and lorries. The device is provided for joining and tension-
ing straps holding the load onto a platform or other load-carrying base.
Background of the Invention
Prior art load-strapping devices are provided with a spindle extending between flanges
of mutually pivoting frame parts of the device. A free end of a strap is passed through
a slot in the spindle, and by a pawl-and-ratchet mechanism provided at the joint, the
spindle is rotated in one direction, thus winding the strap around itself when the frame
parts are repeatedly pivoted in opposite directions. Releasing the strap occurs by re-
leasing the ratchet wheel by pulling two arresting pawls, one in each frame parts,
against spring bias, allowing the spindle to rotate backwards and unwind the strap.
After that, the free end of the strap can be pulled out from the slot. This prior art en-
tails some tedious work with handling the sometimes long, free end of the strap and
pulling it through the slot before tightening, and the reverse action of unwinding the
strap end and finally pulling it out again. For a large load needing a plurality of straps,
these actions have to be repeated many times.
US 2008/0244883 A1 discloses a strapping device where the spindle itself is a two-
part design. A first part of the spindle can be moved relatively to a second part of the
spindle in order to engage and/or release a strap between the parts of the spindle. The
movement between the spindle parts for engaging and releasing the strap is lateral
such that one spindle part is slid in parallel with the other part of the spindle, thus ex-
posing a space where the strap is to be located. Thereby it is possible to place the strap
in the exposed space without having to use and pull the end of the strap through a slot
in the spindle. The slot is established after positioning the strap by sliding the other
part of the spindle back into operating or closed position. Releasing the strap after un-
winding is provided by reversing the movement of the movable part of the spindle. A
similar design is disclosed in .
discloses a strapping device with a bifurcated spindle. In one em-
bodiment, the spindle is provided with two parallel arms joined by a bend. In the
mounted condition, the parallel arms form a slot in the spindle. The spindle can be
inserted and pulled out laterally in the joint between the movable parts. In this way,
the strap can be fitted and removed without taking the free end of the strap and pull it
through the slot. Releasing can be done by drawing the spindle laterally, thus allowing
the windings of the strap to slide off the spindle.
The prior art presented in the cited documents all entail manipulation of a part of the
spindle for engaging and disengaging the strap. In outdoor conditions operation may
be impeded when using gloves for protection, slippery surfaces due to rain or ice, and
dirt on the strap, especially when disengaging and releasing the strap from the strap-
ping device.
Explanation of the Invention
In accordance with a first aspect of the invention, there is provided a load-strapping
device including at least two frame parts connected by a pivotable joint, where one
frame part is attached to a strap, where the joint between the pivotable parts is pro-
vided with a spindle extending between parallel flanges of the frame parts, the pivo-
table joint between the pivotable parts provided at opposite ends of the spindle with a
pawl-and-ratchet mechanism which provides one-way rotation of the spindle when the
pivotable basic parts are pivoted repeatedly in opposing directions, the spindle itself
being a two-part design, where a first part of the spindle can be moved relatively to a
second part of the spindle in order to engage and/or release a strap between the parts of
the spindle, wherein the first part of the spindle is suspended pivotably about a pivot
axis extending through one end of the spindle and substantially at right angles to the
spindle so that the first part can be pivoted between a closed position defined as sub-
stantially in parallel with the second part of the spindle and so that a plane containing
the pivot axis extends longitudinally through the first and second parts of the spindle,
and an open position defined as the first part being pivoted so as to form an angle with
the plane.
The term ‘comprising’ as used in this specification and claims means ‘consisting at
least in part of’. When interpreting statements in this specification and claims which
include the term ‘comprising’, other features besides the features prefaced by this term
in each statement can also be present. Related terms such as ‘comprise’ and ‘com-
prised’ are to be interpreted in a similar manner.
When mounting the strap, the first part of the spindle is pivoted into the open position
and the strap is laid upon the exposed side of the second part of the spindle. After that,
the first part of the spindle is pivoted back into the closed position and the strap can be
tightened in the usual manner. Releasing the strap occurs by pulling back the pawls
like the prior art device and begin unwinding the strap. When the spindle unwinds the
strap, the first part of the spindle will pivot into its open position, thus releasing the
strap which then can be removed without having to pull the remaining length of the
strap through a slot or to manually remove a part of the spindle as envisaged by the art
described in the cited documents. No manipulation is needed, especially when releas-
ing the strap, thus facilitating the use of the strapping device and saving time for the
operator.
In order to retain the first pivotable part of the spindle during rotation thereof it has to
be arrested so that the strap does not move the first part of the spindle. A simple way
of providing such a unilateral arresting of the pivoting movement of the spindle in the
closed position is by letting the first part of the spindle abut with its distal end on a
stop provided in the device.
It is preferred that the distal end of the first part of the spindle is biased towards its
closed position by magnetic means. The magnetic means for biasing the end of the
spindle towards its closed position can be constituted by a permanent magnet embed-
ded in the surface of the second part of the spindle.
It is preferred that the first part of the spindle is made of a round rod with an angular
bend at one end which extends into and is seated in the second part of the spindle.
This will provide a simple and cheap device.
Furthermore, it is preferred that the first part of the spindle is secured by a spring-type
coiled pin or cotter pin provided in a boring in the second part of the spindle and en-
gaging a groove in the end of the first part of the spindle seated in the second part of
the spindle.
The stop may be a cylindric pin seated in and extending above the surface the second
part of the spindle, and the cylindric pin may be secured by a spring-type pin or cotter
pin provided in a boring in the second part of the spindle.
The Drawing
Exemplary embodiments of the invention are now described with reference to the
drawing, in which:
Fig. 1 shows a perspective view of a first embodiment of a strapping device accord-
ing to the invention with the spindle in closed position;
Fig. 2 shows the same as Fig. 1 in a side view;
Fig. 3 shows the same as Fig. 1 in a plan view from above;
Fig. 4 shows a section on the line IV-IV in Fig. 3;
Fig. 5 shows a section on the line V-V in Fig. 3;
Fig. 6 shows the strapping device of Fig. 1 in perspective view but with the spindle
in open position;
Fig. 7 shows the same as Fig. 6 in a plan view from above;
Fig. 8 shows the same as Fig. 6 in a side view;
Fig. 9 shows the same as Fig. 6 in a view obliquely from above;
Fig. 10 shows a perspective view of a second and preferred embodiment of a strap-
ping device according to the invention with the spindle in closed position;
Fig. 11 shows the same as Fig. 10 in a plan view from above;
Fig. 12 shows a section on the line A-A in Fig. 11; and
Figs. 13-16 show details as sections B-B, C-C, D-D and E-E, respectively, of the em-
bodiment in Fig. 11.
Description of Example Embodiments
The strapping device according to the invention comprises several parts in common
with prior art devices for tightening and securing straps or belts on loads to be trans-
ported or be held firm together or to a base.
Both embodiments of the invention shown in the drawings include two mutually piv-
oting frame parts 1, 2 that are hingedly connected at a spindle generally designated by
the number 3. One frame part 1 is provided with a handle 4 for use in the tightening
operation, and the other frame part 2 is provided with a bolt 5 or rod member for se-
curing the end of a not shown strap.
The spindle 3 extends between and through opposing and parallel flanges 7 and 8 of
the frame parts 1 and 2, respectively. Similar to the prior art, the device according to
the invention is provided with a pawl-and-ratchet mechanism for providing a one-way
rotation of the spindle 3 when the parts 1 and 2 are pivoted in opposite directions. The
main features of this mechanism is a pair of ratchet wheels 9 which are fixed to the
spindle 3 between the flanges 7, 8, but rotatably seated in relation to the parts 1 and 2,
and two spring-biased pawls 10, 11 provided in respective frame parts 1, 2. The slid-
ing pawls 10, 11 can be released from engagement with the ratchet wheels 9 by manu-
ally pulling the pawls 10, 11 back against the action of not shown springs.
A first and simple embodiment of the invention is shown in Figs. 1 - 9.
The new feature of the strapping device according to the invention is the special de-
sign of the spindle 3. The spindle 3 is adapted as a two-part member comprising a base
member 12 and a smaller pivotable member 13. In the closed position, the members
12 and 13 form a slot 14 therebetween for receiving a not shown strap, see Figs. 4 and
5. The sectional view indicated by V-V on Fig. 3 also defines a plane by which the
angular position of the small pivotable member 13 can be asserted. The pivotable
member 13 is provided as a round piece of rod which is bent at one end 16 so as to
provide a pivotable suspension of the member 13 when the end 16 is seated in a boring
17 in the base member 12. The pivotable member 13 is thereby able to pivot about an
axis 15, see Fig. 4, the axis 15 extending at right angles to the base member 12. A stop
in the form of a small projection or stop pin 18 is provided at the end of the base
member 12 opposite the end provided with the boring 17. In the open position of the
member 13, it forms an angle with the plane mentioned above.
A second and preferred embodiment of the invention is shown in Figs. 10 - 16, where
features in common with the first embodiment are denoted with the same reference
numbers.
In the second embodiment of the strapping device of the invention, the spindle 3 is
also composed of two parts, a base member 12a and a slender pivotable member 13a.
The main difference as compared with the first embodiment is that magnetic means
are provided for keeping the pivotable member 13a in the closed position as described
below, thus facilitating the operation. The magnetic means are here provided as a
small permanent magnet 20 shaped as a disc which is embedded in a recess in the flat
surface of the base member 12a and secured by conventional means, e.g. by glue or
press-fit, see Fig. 14. The magnet 20 is disposed close to the stop pin 18a so as to hold
the free end of the pivotable member 13a close to or in contact with the stop pin 18a.
Other features of the second embodiment are the securing of the pivotable member
13a, the stop pin 18a and the base member 12a. These are all secured by spring-type
tubular pins or cotter pins 21 lodged in bored holes in the base member 12a, see Figs.
, 13 and 16.
The pivotable member 13a is provided with a circumferential groove 22 at the part
extending into the base member 12a, and a cotter pin 21 indicated on Fig. 10 engages
in a not shows way with this groove 22, retaining the member 13a in position while a
the same time allowing the member 13a to pivot as described below. See Fig. 15.
The pin 18a is provided with a through-going boring 23 in the part inserted in the base
member 12a, see Fig. 13, thereby securing the pin 18a to the base member 12a.
The base member 12a is provided with through-going cotter pins 21 in through-going
holes at the ends that protrude laterally of the strapping device, se the detail in Fig. 16.
The strapping device according to the invention operates as follows.
At first, the small member 13 of the spindle is pivoted to the open position. Figs. 6 and
7 shows the member 13 at an angle of about 60º from the closed position, but greater
angles more than 90º are possible by the invention. Then the strap or belt, being the
same as the one fitted on the bolt 5 or being a separate strap, is laid (not shown) in the
free space over the base member 12, 12a. The small member 13, 13a is then pivoted
back to closed position shown on Figs. 1 - 5 and 10 - 12, abutting on the stop 18, 18a
and receiving the strap in the slot 14. Now the frame part 1 can be pivoted back and
forth relative to the second frame part 2, thus providing a rotation in the direction indi-
cated by arrow 19 on Fig. 1; the pivoting action of the member 13a in the second em-
bodiment is not shown but is completely analogous to that of the first embodiment of
the strapping device. The stop 18 will now retain the small pivotable member 13, 13a
in its closed position when the strap bears on the member 13, 13a due to the rotation
of the spindle 3. Eventually, the strap is wound on the spindle 3 in the manner known
from the prior art.
When the strap is to be released, the two pawls 10, 11 are pulled back manually so as
to make the ratchet wheel 9 and thus the spindle 3 rotate in direction opposite the
tightening direction 19. When the last winding is unrolled, the small pivotable mem-
ber 13, 13a will be carried and drawn by the strap from the closed position to the open
position. The strap is thereby released and can be removed without any manipulation
of the members 12, 12a; 13, 13a of the spindle 3. The invention thereby provides a
more expedient and more time-saving operation than the hitherto known strapping
devices.
Other embodiments of the invention are possible with the scope of the claims. The
pivotable member of the spindle can have other shapes, e.g. rectangular in cross-
section, and be composed of more than one part. The stop for limiting the pivoting of
the pivotable member can be provided by other means, e.g. by a special configuration
at the seating of the member. The magnetic means may be provided in other ways, e.g.
by the stop pin itself being magnetic. Also the base member of the spindle can have
other cross-sections than the partially circular shown in the drawings.
Claims (11)
1. A load-strapping device including at least two frame parts connected by a pivotable joint, where one frame part is attached to a strap, where the joint between the pivotable 5 parts is provided with a spindle extending between parallel flanges of the frame parts, the pivotable joint between the pivotable parts provided at opposite ends of the spindle with a pawl-and-ratchet mechanism which provides one-way rotation of the spindle when the pivotable basic parts are pivoted repeatedly in opposing directions, the spin- dle itself being a two-part design, where a first part of the spindle can be moved rela- 10 tively to a second part of the spindle in order to engage and/or release a strap between the parts of the spindle, wherein the first part of the spindle is suspended pivotably about a pivot axis extending through one end of the spindle and substantially at right angles to the spindle so that the first part can be pivoted between a closed position defined as substantially in parallel with the second part of the spindle and so that a 15 plane containing the pivot axis extends longitudinally through the first and second parts of the spindle, and an open position defined as the first part being pivoted so as to form an angle with the plane.
2. Load-strapping device according to claim 1, wherein in the closed position, the first 20 part of the spindle abuts with its distal end on a stop provided in the device.
3. Load-strapping device according to claim 2, wherein the distal end of the first part of the spindle is biased towards its closed position by magnetic means. 25
4. Load-strapping device according to claim 3, wherein the magnetic means for bias- ing the end of the spindle towards its closed position comprises a permanent magnet embedded in the surface of the second part of the spindle.
5. Load-strapping device according to any preceding claim wherein the largest angle 30 formed by first part of the spindle in the open position is at least 60º.
6. Load-strapping device according to any one of claims 2 - 5, wherein the first part of the spindle is made of a round rod with an angular bend at one end which extends into and is seated in the second part of the spindle.
7. Load-strapping device according to claim 6, wherein the first part of the spindle is secured by a spring-type pin or cotter pin provided in a boring in the second part of the 5 spindle and engaging a groove in the end of the first part of the spindle seated in the second part of the spindle.
8. Load-strapping device according to claim 2, wherein the stop is a cylindric pin seated in and extending above the surface the second part of the spindle, and wherein 10 the cylindric pin is secured by a spring-type pin or cotter pin provided in a boring in the second part of the spindle.
9. Load-strapping device according to any preceding claim wherein the shape of the second part of the spindle is partially circular.
10. Load-strapping device according to claim 1, substantially as herein described with reference to any embodiment disclosed.
11. A load-strapping device substantially as herein described with reference to any 20 embodiment shown in the accompanying drawings.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKBA201100056 | 2011-03-21 | ||
DKBA201100056 | 2011-03-21 | ||
PCT/DK2012/050083 WO2012126476A1 (en) | 2011-03-21 | 2012-03-20 | Load-strapping device |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ616772A NZ616772A (en) | 2015-11-27 |
NZ616772B2 true NZ616772B2 (en) | 2016-03-01 |
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