GB2143893A - Moving side curtains of trailers - Google Patents
Moving side curtains of trailers Download PDFInfo
- Publication number
- GB2143893A GB2143893A GB08319587A GB8319587A GB2143893A GB 2143893 A GB2143893 A GB 2143893A GB 08319587 A GB08319587 A GB 08319587A GB 8319587 A GB8319587 A GB 8319587A GB 2143893 A GB2143893 A GB 2143893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- piece
- trailer
- drive
- auxiliary
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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
- 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
- B60J5/067—Doors arranged at the vehicle sides slidable; foldable for utility vehicles or public transport with non-rigid elements, e.g. side curtains vertically movable
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
A mechanism for moving the side curtains of a trailer comprises drive means (9) coupled to a drive shaft (7), an auxiliary shaft (5) rigidly connected to the side frame, and transfer means (6) coupled to the drive shaft (7) and the auxiliary shaft (5) to transfer rotation of the drive shaft (7). The auxiliary shaft (5) comprises at least two separate colinear shaft pieces (11, 12, 13, 14), each piece being connected to the adjacent piece by means of a universal joint (15, 16, 17) the transfer means (6) being coupled to only one shaft piece (13), rotation being imparted along the auxiliary shaft (5) by the or each universal joint (15, 16, 17). <IMAGE>
Description
SPECIFICATION
Improvements in and relating to trailers
This invention relates to an improved mechanism for removable side curtains from a trailer.
Many trailers are of the type which include a movable frame structure forming the side walls of the trailer covered by curtain. The frame extends from the top of the side of a trailer to support at least part of the side curtain. The side frame is rigidly connected to a shaft. When this shaft is rotated the side frame is rotated thus moving the side curtain.
The rotatable shaft is connected via chain drives to a drive shaft which is driven either by a hand operated mechanism or by a motor.
The shaft to which the frame is connected extends along the length of the trailer. If the vehicle chassis is not level, twisting of the shaft may occur which may jam the operation of the mechanism moving the side curtain.
According to this invention a mechanism for movement of a side frame supporting at least part of a side curtain of a trailer comprising drive means coupled to a drive shaft, an auxiliary shaft rigidly connected to the side frame, transfer means coupled to the drive shaft and the auxiliary shaft to transfer rotation of the drive shaft to rotation of the auxiliary shaft, in which the auxiliary shaft comprises at least two separate colinear shaft pieces, each piece being connected to the adjacent piece by means of a universal joint,the transfer means being coupled to only one shaft piece, rotation being imparted along the auxiliary shaft by the or each universal joint.
In this improved mechanism, the presence of the universal joints between the shaft pieces allows the auxiliary shaft to be rotated even when the shaft pieces are not aligned.
This means that the mechanism can operate irrespective of the level of the chassis or ground.
The drive means may be manually operated or may be a motor.
Preferably the transfer means is a simple chain gear which is connected to the drive shaft and one shaft piece of the auxiliary shaft.
Preferably the shafts include three or four shaft parts to allow the greatest flexibility of movement.
The motion imparted by such a mechanism is smooth and even whatever the level of the vehicle chassis.
The drive shaft and the shaft pieces of the auxiliary shaft are rotatably mounted in brackets fastened to the trailer. Preferably the drive shaft includes separate end pieces connected to the drive shaft by universal joints the end pieces of the shaft being those pieces rotatably connected to the mounting brackets. This allows more flexibility of movement.
Preferably the mounting brackets rotatably mounting the auxiliary shaft are arranged such that each bracket is rotatably connected to a different shaft piece. This means that if the trailer is not level and the mounting brackets are thus not aligned, between each two brackets is a universal joint so that no twisting of the auxiliary shaft can occur. This means that the mechanism will operate smoothly.
An example of a mechanism in accordance with the invention will now be described in contrast with the prior art with reference to the accompanying drawings in which:
Figure 1 is a schematic view of a side curtain;
Figure 2 is a schematic view of a mechanism of the prior art;
Figure 3 is a schematic view of the mechanism according to the invention; and
Figure 4 is a perspective view of two shaft pieces of the auxiliary shaft connected by universal joints.
A trailer 1, includes a side curtain 2 supported by a framework 3. The framework 3 consists of a plurality of parallel members 4 attached at their ends to a shaft 5. The shaft 5 is the auxiliary shaft and is driven via a chain gear 6 from a drive shaft 7. A handle 8 manually operates the drive shaft 7 via worm gears 9. The shafts 5 and 6 are rotatably mounted on brackets 10 along the length of the shaft. The shaft 5 is one continuous member. If the trailer 1 is on uneven ground the shaft 5 twists and the mechanism will not operate smoothly.
In the mechanism in accordance with the invention the auxiliary shaft 5 comprises end shaft pieces 11 and shaft pieces 12, 1 3 and 1 4. These shaft pieces are connected together by universal joints 1 5, 1 6 and 1 7.
The drive shaft 7 includes two end pieces 1 8 and 1 9 connected to the drive shaft 7 by universal joints 20 and 21. Chain gear 6 is connected to end pieces 1 9 of the drive shaft and shaft piece 1 3 of the auxiliary shaft 5.
Rotation of handle 8 transmits rotation to the drive shaft 7 via worm gear 9 and universal joints 20 and 21. The shaft piece 1 3 then rotates transferring rotation to shaft pieces 11, 1 2 and 14 by universal joints.
The trailer includes brackets 22, 23 and 24 which serve to rotatably mount the drive shaft 7 and the auxiliary shaft 5.
Bracket 22 is connected to end shaft piece 11 of the auxiliary shaft, and to end piece 18 of the drive shaft 7. Bracket 23 is connected to shaft piece 1 3 of the auxiliary shaft 5 and to end piece 1 9 of the drive shaft 7. If the trailer 1 is on uneven ground the brackets 22 and 23 may become misaligned. However the presence of the universal joints 1 5 and 1 6 on the auxiliary shaft means that each shaft piece may rotate freely even if they are not aligned.
Thus rotation may be transmitted along auxiliary shaft even if the trailer is on uneven ground.
Rotation of the auxiliary shaft 5 anticlockwise causes the framework 3 to rotate upwards and outwards thus removing the side curtain 2 from the side of the trailer.
Claims (9)
1. A mechanism for movement of a side frame supporting at least part of a side curtain of a trailer comprising drive means coupled to a drive shaft, an auxiliary shaft rigidly connected to the side frame, transfer means coupled to the drive shaft and the auxiliary shaft to transfer rotation of the drive shaft to rotation of the auxiliary shaft, in which the auxiliary shaft comprises at least two separate colinear shaft pieces, each piece being connected to the adjacent piece by means of a universal joint, the transfer means being coupled to only one shaft piece, rotation being imparted along the auxiliary shaft by the or each universal joint.
2. A mechanism according to claim 1, in which the drive means is manually operable.
3. A mechanism according to claim 1, in which the drive means is a motor.
4. A mechanism according to any one of the preceding claims, in which, the transfer means is a simple chain gear which is connected to the drive shaft and one shaft piece of the auxiliary shaft.
5. A mechanism according to any one of the preceding claims, in which, the shafts include three or four shaft parts to allow flexibility of movement.
6. A mechanism according to any one of the preceding claims, in which, each end of the drive shaft is connected to a universal joint, each universal joint being connected to an end shaft, the drive shaft being mounted on the trailer only by the end shafts being rotatably mounted on brackets on the trailer.
7. A mechanims according to any one of the preceding claims, in which, each piece of the auxiliary shaft is rotatably connected to a bracket mounted on the trailer.
8. A mechanism according to claim 1 and arranged substantially as herein described.
9. A mechanism for movement of a side frame supporting at least part of a side curtain of a trailer arranged substantially as herein described with reference to Figs. 3 and 4 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08319587A GB2143893A (en) | 1983-07-20 | 1983-07-20 | Moving side curtains of trailers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08319587A GB2143893A (en) | 1983-07-20 | 1983-07-20 | Moving side curtains of trailers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8319587D0 GB8319587D0 (en) | 1983-08-24 |
| GB2143893A true GB2143893A (en) | 1985-02-20 |
Family
ID=10546013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08319587A Withdrawn GB2143893A (en) | 1983-07-20 | 1983-07-20 | Moving side curtains of trailers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2143893A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1005693C2 (en) * | 1997-04-01 | 1998-10-05 | D Tec Trailers B V | Machine to deploy tarpaulin cover over load of goods vehicle |
| EP3254876A1 (en) * | 2016-05-18 | 2017-12-13 | Pwp Sa | Composition of a winding shaft for a truck body with an adapter part and adapter part for a connection between a winding shaft and a drive shaft |
-
1983
- 1983-07-20 GB GB08319587A patent/GB2143893A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1005693C2 (en) * | 1997-04-01 | 1998-10-05 | D Tec Trailers B V | Machine to deploy tarpaulin cover over load of goods vehicle |
| EP3254876A1 (en) * | 2016-05-18 | 2017-12-13 | Pwp Sa | Composition of a winding shaft for a truck body with an adapter part and adapter part for a connection between a winding shaft and a drive shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8319587D0 (en) | 1983-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |