WO1999001328A1 - Curtain tensioner - Google Patents

Curtain tensioner Download PDF

Info

Publication number
WO1999001328A1
WO1999001328A1 PCT/AU1998/000501 AU9800501W WO9901328A1 WO 1999001328 A1 WO1999001328 A1 WO 1999001328A1 AU 9800501 W AU9800501 W AU 9800501W WO 9901328 A1 WO9901328 A1 WO 9901328A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
curtain
support
assembly
elongate
Prior art date
Application number
PCT/AU1998/000501
Other languages
French (fr)
Inventor
Kevin James Campbell
Original Assignee
Rolltight Pty. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rolltight Pty. Ltd. filed Critical Rolltight Pty. Ltd.
Priority to DE19882489T priority Critical patent/DE19882489T1/en
Priority to NZ501927A priority patent/NZ501927A/en
Priority to AU80937/98A priority patent/AU746111B2/en
Priority to CA002295960A priority patent/CA2295960A1/en
Priority to GB9929738A priority patent/GB2340867B/en
Publication of WO1999001328A1 publication Critical patent/WO1999001328A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
    • B60J7/08—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position
    • B60J7/10—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position readily detachable, e.g. tarpaulins with frames, or fastenings for tarpaulins
    • B60J7/102—Readily detachable tarpaulins, e.g. for utility vehicles; Frames therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/06—Doors arranged at the vehicle sides slidable; foldable
    • B60J5/062—Doors arranged at the vehicle sides slidable; foldable for utility vehicles or public transport
    • B60J5/065—Doors arranged at the vehicle sides slidable; foldable for utility vehicles or public transport with non-rigid elements, e.g. side curtains

Definitions

  • This invention relates to vehicle curtains of the kind used on vehicles such as trucks, trailers, railway carriages and the like.
  • Vehicle curtains and in particular, side curtains are widely used to enclose a load and protect the load from moisture and road grim whilst providing fairly ready access to any part of the load.
  • Vehicle curtains of this type are typically mounted by being wound around an elongate roller which is mounted with the vehicle.
  • the elongate roller is usually mounted vertically at the front or rear corner of the vehicle.
  • the roller provides means of storing the curtain when not in use and also provides for tensioning of the curtain when the opposite edge is secured.
  • a tensioning mechanism of any one of several known types is associated with the curtain roller to apply a toque and tension the curtain.
  • a difficulty frequently encountered however, is that the curtain roller, which is supported only at its ends, bends during the tensioning so that an uneven tension is applied to the curtain.
  • the flapping of a curtain can reduce curtain life. Flapping movement also raises serious safety issues in relation to the rearview of the vehicle driver and the visibility past the vehicle for other road users.
  • the flapping of a curtain also has an impact on aesthetic appeal which can be important because vehicle curtains frequently carry advertising material.
  • a vehicle curtain assembly including a curtain; an elongate curtain roller about which the curtain can be wound; a selectively operable tensioning mechanism associated with the curtain roller to provide for tensioning of the curtain; and at least one support roller mounted adjacent said curtain roller to bear against the curtain wound around the curtain roller and limit deflection of the curtain roller during tensioning of the curtain.
  • this invention provides a support roller assembly for a vehicle curtain roller, said assembly including a support bracket, a roller mounted with said bracket for contact with the curtain roller, and stop means extending from said bracket adjacent said roller for selective engagement with a curtain wound around the curtain roller during deflection of the curtain roller under load to clamp the curtain.
  • the curtain roller bears against the support roller on the side of the support roller axis remote from the curtain.
  • stop means are provided adjacent the support roller on the curtain side and the curtain roller is resiliently deflected under a selected load corresponding to a desired curtain tension to move across the support roller and engage the stop means clamping the curtain between the curtain roller and the stop means.
  • the stop means is preferably formed by an extension of a bracket arm mounting the support roller.
  • a number of support rollers are mounted along the length of the curtain roller according to the length of the roller.
  • the rollers are mounted approximately 1 ,200 mm apart.
  • the or each support roller is or are preferably of cylindrical form and mounted for rotation about an axis substantially parallel to the rotational axis of the curtain roller.
  • the support rollers are preferably formed by segments of individual narrower rollers portions separated by grooves. These can, for example, be conventional roller or ball bearings. In one form of the invention two sets of nestingly arranged individual rollers are mounted on parallel axes of rotation.
  • Figure 1 is a schematic elevation of a vehicle curtain assembly fitted to a vehicle
  • Figure 2 is a schematic elevation of a support roller assembly
  • FIG 3 is a schematic perspective view of the support roller assembly shown in Figure 2;
  • Figure 4 is a schematic sectional view of the assembly shown in Figure 2 and 3 also showing a curtain and curtain roller;
  • Figure 5 is a schematic perspective view of a second embodiment of a support roller assembly
  • Figure 6 is a schematic sectional elevation of the support roller assembly shown in
  • Figure 7 is a schematic sectional end view of the support roller assembly shown in Figure 5 and 6 also showing a curtain and curtain roller.
  • FIG. 1 shows a vehicle fitted with vehicle curtains of known type.
  • the vehicle curtain assembly 10 comprises a curtain roller 11 about which a curtain 12 is wound in the usual manner.
  • a tensioning mechanism 13 of conventional type is associated with the curtain roller 11. The operation of the tensioning mechanism to selectively tension the curtain 12 as required is well known to those skilled in the art and will not be described in detail.
  • Support rollers 14 are mounted for rotation about an axis parallel to the axis of rotation of curtain roller 11. As best seen in Figures 2 and 3 the support rollers 14 are mounted by means of a bracket 15.
  • the bracket 15 is appropriately fixed, usually by bolting or welding, to the vehicle frame on which the curtain assembly 10 is mounted.
  • Bracket 15 includes perpendicularly extending arms 16 which terminate in a smoothly curved extension 17 which acts as a stop as described below.
  • Support roller 14 comprises a series of individual rollers 18 separated by grooves 19.
  • a pin 20 passes through the centre of the rollers 18 and 5 through the arms 16 to provide rotational mounting.
  • the curtain roller 11 When the curtain 12 is not under tension, the curtain roller 11 is not deflected by the tensioning load and is spaced apart from support roller 14. As the curtain 12 is wound onto curtain roller 11 by the operation of the tensioning mechanism 13, the curtain roller 11 begins
  • the curtain roller 11 limits the deflection of the curtain roller 11 and provides for a more even tensioning of the curtain 12 along its length. As the tension is further increased the curtain roller 11 resiliently deflects and over centres on support roller 14 to move the curtain 12 wrapped around it to the
  • FIGs 5, 6 and 7 show a second embodiment of the support roller assembly forming part of the vehicle curtain assembly.
  • two interleaved or nestled support roller arrangements 14a, 14b, are shown mounted on parallel pins 20a, 20b.
  • rollers 14a, 14b are similarly formed by individual rollers 18a, 18b separated by grooves 19a, 19b.
  • the rollers 18a, 18b and grooves 19a, 19b nestingly engage as best seen in Figure 5.
  • the bracket 15 is generally similar and includes smoothly curved stop 17a.
  • the operation of the modified form of the invention is generally similar to that described above except that as seen in Figure 7, the curtain 12 around curtain roller 11 initially contacts both rollers 14a,
  • support roller 14 provides a low friction contact with the curtain on the rotating curtain roller so as not to inhibit further tensioning once the roller is deflected into contact but before the curtain roller over centres to contact stop 17.
  • the curtain assembly of this invention provides significant advantages over existing curtain assemblies.
  • it ensures that a more uniform tension is applied over the depth of the curtain and that once tensioned the curtain roller is locked into place.
  • the flapping or billowing of curtains on the sides of vehicles is considerably reduced thereby improving visibility for both the driver and other road users.
  • the curtain is maintained in a generally more flattened condition so that advertising material can be more effectively displayed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)

Abstract

A support roller assembly for a vehicle curtain roller (11) having a selectively operable tensioning mechanism (13) for providing tensioning of the curtain (12). The assembly includes a support bracket (15) and a roller (14) mounted with the bracket. At least one support roller (14) is mounted adjacent the curtain roller (11) to bear against the curtain (12) wound around the curtain roller (11) and limit deflection of the curtain roller (11) during tensioning of the curtain. A stop (17) extends from the bracket (15) adjacent the roller (14) for selective engagement with the curtain (12) wound around the curtain roller (11) during deflection of the curtain roller (11) under load to clamp the curtain (12).

Description

CURTAIN TENSIONER
Technical Field
This invention relates to vehicle curtains of the kind used on vehicles such as trucks, trailers, railway carriages and the like.
Background Art
Vehicle curtains, and in particular, side curtains are widely used to enclose a load and protect the load from moisture and road grim whilst providing fairly ready access to any part of the load. Vehicle curtains of this type are typically mounted by being wound around an elongate roller which is mounted with the vehicle. The elongate roller is usually mounted vertically at the front or rear corner of the vehicle. In use the roller provides means of storing the curtain when not in use and also provides for tensioning of the curtain when the opposite edge is secured. For this purpose a tensioning mechanism of any one of several known types is associated with the curtain roller to apply a toque and tension the curtain. A difficulty frequently encountered however, is that the curtain roller, which is supported only at its ends, bends during the tensioning so that an uneven tension is applied to the curtain. This can result in movement or flapping of the curtain particularly at highway vehicle speeds. The flapping of a curtain can reduce curtain life. Flapping movement also raises serious safety issues in relation to the rearview of the vehicle driver and the visibility past the vehicle for other road users. The flapping of a curtain also has an impact on aesthetic appeal which can be important because vehicle curtains frequently carry advertising material.
Disclosure of the Invention
It is an object of this invention to provide a vehicle curtain assembly and a support roller assembly which overcomes, or at least ameliorates, the above disadvantage.
Accordingly, in one aspect of this invention provides a vehicle curtain assembly including a curtain; an elongate curtain roller about which the curtain can be wound; a selectively operable tensioning mechanism associated with the curtain roller to provide for tensioning of the curtain; and at least one support roller mounted adjacent said curtain roller to bear against the curtain wound around the curtain roller and limit deflection of the curtain roller during tensioning of the curtain.
In a second aspect this invention provides a support roller assembly for a vehicle curtain roller, said assembly including a support bracket, a roller mounted with said bracket for contact with the curtain roller, and stop means extending from said bracket adjacent said roller for selective engagement with a curtain wound around the curtain roller during deflection of the curtain roller under load to clamp the curtain.
Preferably, the curtain roller bears against the support roller on the side of the support roller axis remote from the curtain. Preferably stop means are provided adjacent the support roller on the curtain side and the curtain roller is resiliently deflected under a selected load corresponding to a desired curtain tension to move across the support roller and engage the stop means clamping the curtain between the curtain roller and the stop means. The stop means is preferably formed by an extension of a bracket arm mounting the support roller.
Preferably, a number of support rollers are mounted along the length of the curtain roller according to the length of the roller. In the preferred form of the invention the rollers are mounted approximately 1 ,200 mm apart.
The or each support roller is or are preferably of cylindrical form and mounted for rotation about an axis substantially parallel to the rotational axis of the curtain roller.
The support rollers are preferably formed by segments of individual narrower rollers portions separated by grooves. These can, for example, be conventional roller or ball bearings. In one form of the invention two sets of nestingly arranged individual rollers are mounted on parallel axes of rotation.
One embodiment of the invention will now be described, by way of example only , with reference to the accompanying drawings. Brief Description of the Drawings
' Figure 1 is a schematic elevation of a vehicle curtain assembly fitted to a vehicle;
Figure 2 is a schematic elevation of a support roller assembly;
Figure 3 is a schematic perspective view of the support roller assembly shown in Figure 2;
Figure 4 is a schematic sectional view of the assembly shown in Figure 2 and 3 also showing a curtain and curtain roller;
Figure 5 is a schematic perspective view of a second embodiment of a support roller assembly;
Figure 6 is a schematic sectional elevation of the support roller assembly shown in
Figure 1; and
Figure 7 is a schematic sectional end view of the support roller assembly shown in Figure 5 and 6 also showing a curtain and curtain roller.
Best Modes for Carrying Out the Invention
Figure 1 shows a vehicle fitted with vehicle curtains of known type. The vehicle curtain assembly 10 comprises a curtain roller 11 about which a curtain 12 is wound in the usual manner. A tensioning mechanism 13 of conventional type is associated with the curtain roller 11. The operation of the tensioning mechanism to selectively tension the curtain 12 as required is well known to those skilled in the art and will not be described in detail.
Support rollers 14 are mounted for rotation about an axis parallel to the axis of rotation of curtain roller 11. As best seen in Figures 2 and 3 the support rollers 14 are mounted by means of a bracket 15. The bracket 15 is appropriately fixed, usually by bolting or welding, to the vehicle frame on which the curtain assembly 10 is mounted. Bracket 15 includes perpendicularly extending arms 16 which terminate in a smoothly curved extension 17 which acts as a stop as described below. Support roller 14 comprises a series of individual rollers 18 separated by grooves 19. A pin 20 passes through the centre of the rollers 18 and 5 through the arms 16 to provide rotational mounting.
When the curtain 12 is not under tension, the curtain roller 11 is not deflected by the tensioning load and is spaced apart from support roller 14. As the curtain 12 is wound onto curtain roller 11 by the operation of the tensioning mechanism 13, the curtain roller 11 begins
10 to deflect under the applied load. As a consequence, the curtain 12 wrapped around the roller contacts the support roller 14 as shown by solid line 12a in Figure 4. The support roller thus limits the deflection of the curtain roller 11 and provides for a more even tensioning of the curtain 12 along its length. As the tension is further increased the curtain roller 11 resiliently deflects and over centres on support roller 14 to move the curtain 12 wrapped around it to the
15 position shown by broken line 12b in Figure 4. When this happens the curtain 12 is clamped between curtain roller 11 and stop 19a and no further tensioning is possible. The amount of deflection of the curtain roller 11 and relative position of stop 17 and support roller 14 are chosen so that clamping is effected at the required curtain tension. Reversing of the tensioning mechanism 13 allows curtain roller 11 to move out of engagement with stop 17 and 0 return to its unloaded position spaced apart from support rollers 18.
Figures 5, 6 and 7 show a second embodiment of the support roller assembly forming part of the vehicle curtain assembly. In this configuration two interleaved or nestled support roller arrangements 14a, 14b, are shown mounted on parallel pins 20a, 20b. The support
25 rollers 14a, 14b, are similarly formed by individual rollers 18a, 18b separated by grooves 19a, 19b. The rollers 18a, 18b and grooves 19a, 19b nestingly engage as best seen in Figure 5. The bracket 15 is generally similar and includes smoothly curved stop 17a. The operation of the modified form of the invention is generally similar to that described above except that as seen in Figure 7, the curtain 12 around curtain roller 11 initially contacts both rollers 14a,
30 14b. This position is shown by the solid line 12a in Figure 7. When the tension reaches the desired level, the curtain roller 11 is deflected to the curtain 12 as shown by the broken line 12b* so mat the curtain 12 is again clamped between the curtain roller 11 and stop 17.
It will be apparent that the nature of the support roller 14 provides a low friction contact with the curtain on the rotating curtain roller so as not to inhibit further tensioning once the roller is deflected into contact but before the curtain roller over centres to contact stop 17.
The curtain assembly of this invention provides significant advantages over existing curtain assemblies. In particular, it ensures that a more uniform tension is applied over the depth of the curtain and that once tensioned the curtain roller is locked into place. As a result the flapping or billowing of curtains on the sides of vehicles is considerably reduced thereby improving visibility for both the driver and other road users. Additionally, the curtain is maintained in a generally more flattened condition so that advertising material can be more effectively displayed.
The foregoing describes only one embodiment of the invention, and modifications can be made without departing from the scope of the invention.

Claims

THE CLAIMS DEFINING THIS INVENTION ARE AS FOLLOWS:
1. A vehicle curtain assembly including a curtain; an elongate curtain roller about which the curtain can be wound; a selectively operable tensioning mechanism associated with the curtain roller to provide for tensioning of the curtain; and at least one support roller mounted adjacent said curtain roller to bear against the curtain wound around the curtain roller and limit deflection of the curtain roller during tensioning of the curtain.
2. A vehicle curtain assembly as claimed in claim 1 wherein the or each support roller is mounted for rotation about an axis substantially parallel to the axis of rotation of the curtain roller.
3. A vehicle curtain assembly as claimed in claim 2 wherein the curtain roller bears against the support roller on one side of the roller axis of rotation.
4. A vehicle curtain roller assembly as claimed in claim 3 wherein stop means are provided adjacent the support roller for selective engagement with the curtain wound around the curtain roller during deflection of the curtain roller under load to clamp the curtain.
5. A vehicle curtain roller assembly as claimed in any one of claims 1 to 4 wherein the or each roller is cylindrically elongate and is formed by segments of narrower roller portions separated by grooves.
6. A vehicle curtain roller assembly as claimed in any one of claims 1 to 4 including two closely adjacent cylindrically elongate support rollers are mounted on substantially parallel axes.
7. A vehicle curtain roller assembly as claimed in claim 6 wherein each of said two elongate rollers is formed by segments of narrower roller portions separated by grooves and arranged such that the narrower roller portions of each elongate roller extend into the grooves of the other elongate roller.
8. A support roller assembly for a vehicle curtain roller, said assembly including a support bracket, a roller mounted with said bracket for contact with the curtain roller, and stop means extending from said bracket adjacent said roller for selective engagement with a curtain wound around the curtain roller during deflection of the curtain roller under load to clamp the curtain.
9. A support roller assembly as claimed in claim 8 wherein the or each support roller is mounted for rotation about an axis substantially parallel to the axis of rotation of the curtain roller.
10. A support roller assembly as claimed in claim 9 wherein the curtain roller bears against the support roller on one side of the roller axis of rotation.
11. A support roller assembly as claimed in any one of claims 8 to 10 wherein said stop means is formed by an extension of a bracket arm mounting the support roller.
12. A support roller assembly as claimed in claims 8 to 11 wherein the or each roller is cylindrically elongate and is formed by segments of narrower roller portions separated by grooves.
13. A support roller assembly as claimed in any one of claims 8 to 11 including two closely adjacent cylindrically elongate support rollers are mounted on substantially parallel axes.
14. A support roller assembly as claimed in claim 13 wherein each of said two elongate rollers is formed by segments of narrower roller portions separated by grooves and arranged such that the narrower roller portions of each elongate roller extend into the grooves of the other elongate roller.
PCT/AU1998/000501 1997-06-30 1998-06-30 Curtain tensioner WO1999001328A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19882489T DE19882489T1 (en) 1997-06-30 1998-06-30 Curtain tensioner
NZ501927A NZ501927A (en) 1997-06-30 1998-06-30 Curtain tensioner
AU80937/98A AU746111B2 (en) 1997-06-30 1998-06-30 Curtain tensioner
CA002295960A CA2295960A1 (en) 1997-06-30 1998-06-30 Curtain tensioner
GB9929738A GB2340867B (en) 1997-06-30 1998-06-30 Curtain tensioner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPO7622 1997-06-30
AUPO7622A AUPO762297A0 (en) 1997-06-30 1997-06-30 Curtain tensioner

Publications (1)

Publication Number Publication Date
WO1999001328A1 true WO1999001328A1 (en) 1999-01-14

Family

ID=3801911

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1998/000501 WO1999001328A1 (en) 1997-06-30 1998-06-30 Curtain tensioner

Country Status (6)

Country Link
AU (1) AUPO762297A0 (en)
CA (1) CA2295960A1 (en)
DE (1) DE19882489T1 (en)
GB (1) GB2340867B (en)
NZ (1) NZ501927A (en)
WO (1) WO1999001328A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516802A (en) * 1982-12-02 1985-05-14 Compton Warren L Truck cover
GB2258805A (en) * 1991-08-20 1993-02-24 Seaka Prod Ltd A curtain tensioner
DE19628431C1 (en) * 1996-07-15 1998-01-02 Schmitz Anhaenger Fahrzeugbau Curtain sided truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516802A (en) * 1982-12-02 1985-05-14 Compton Warren L Truck cover
GB2258805A (en) * 1991-08-20 1993-02-24 Seaka Prod Ltd A curtain tensioner
DE19628431C1 (en) * 1996-07-15 1998-01-02 Schmitz Anhaenger Fahrzeugbau Curtain sided truck

Also Published As

Publication number Publication date
GB2340867B (en) 2001-10-03
CA2295960A1 (en) 1999-01-14
AUPO762297A0 (en) 1997-07-24
GB2340867A (en) 2000-03-01
DE19882489T1 (en) 2000-08-10
GB9929738D0 (en) 2000-02-09
NZ501927A (en) 2002-09-27

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