GB2112357A - Improvements in or relating to load-carrying vehicles - Google Patents
Improvements in or relating to load-carrying vehicles Download PDFInfo
- Publication number
- GB2112357A GB2112357A GB08138709A GB8138709A GB2112357A GB 2112357 A GB2112357 A GB 2112357A GB 08138709 A GB08138709 A GB 08138709A GB 8138709 A GB8138709 A GB 8138709A GB 2112357 A GB2112357 A GB 2112357A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vehicle
- frame
- road vehicle
- transport frame
- transport
- 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.)
- Granted
Links
- 230000009977 dual effect Effects 0.000 description 2
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
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/64—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable
- B60P1/6418—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar
- B60P1/6463—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar fitted with articulated beams for longitudinal displacement of the container
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
This invention relates to load- carrying road vehicles provided with means for hoisting a transport frame (2) on to the vehicle and offloading it from the vehicle and also for tipping the frame with respect to the vehicle. In accordance with the invention, the transport frame 2 is locked to the chassis when it is in the transport position but can nevertheless be tipped relative to the vehicle when required. In the final phase of loading the transport frame on to the vehicle, anchor members (19) on the frame slide under hooks (20) on the chassis of the vehicle, thus locking the frame to the vehicle chassis. In addition during this movement an engagement plate (18) on the frame slides under a hook on the front beam (5) of the lifting apparatus. The front beam is pivotally connected at 16 to a rear beam (3) which is itself pivotally mounted on the chassis. When the frame is to be tipped, it is moved back sufficiently to disengage the anchor members (19) from the hooks (20). This movement also causes actuation of a locking device (21) to lock the front beam (5) to the rear beam (3). At this stage the plate (18) is still engaged below the hook on the front beam (5). <IMAGE>
Description
SPECIFICATION
Improvements in or relating to load-carrying road vehicles
This invention relates to load-carrying road vehicles of the kind provided with means for hoisting a load on to the vehicle and off-loading it from the vehicle, and also for tipping the load with respect to the vehicle.
Various systems are known for hoisting and tipping loads on vehicles, and one such known system includes a lifting arm pivotally mounted on the vehicle and carrying, at its free end, a hook adapted to engage an upstanding member at the forward end of a transport frame to which the load is secured.
When a load is to be hoisted on to a vehicle in accordance with this system, it is first secured to the transport frame, and the vehicle is positioned so that its rear end is located in the vicinity of the forward end of the transport frame. The lifting arm is then moved under hydraulic control so that the hook engages in the upstanding member at the forward end of the transport frame. The hydraulic system then moves the lifting arm so that the forward end of the transport frame is lifted off the ground and the frame is pulled over the back of the vehicle and moved forwardly along the vehicle chassis into the transport position.
The lifting arm normally includes a first member which is pivotally mounted on the vehicle and a second member which is pivotally mounted on the forward end of the first member.
A third member is slidable with respect to the second member and includes a jib having a hook at its upper end. First hydraulic control means are located in the second member to control the sliding movement of the third member, and second hydraulic control means are provided to control the pivotal movements of the first and second members.
When the transport frame is to be lifted over the rear of the vehicle, the third member, together with the jib, is moved to its rearwardmost position by the first hydraulic control means. The second member is then caused by the second hydraulic control means to pivot with respect to the first member so that the hook can be engaged in the upstanding member on the transport frame. The second hydraulic control means are then operated to cause the second member to pivot with respect to the first member in the direction necessary to lift the forward end of the transport frame off the ground. This pivoting motion is continued until the frame has been pulled over the back of the vehicle and moved forwardly along the vehicle.
When the second member reaches the position in which it is substantially horizontal so that the third member is substantially vertical, the first hydraulic means is used to move the transport frame further forward on the vehicle into the transport position.
During the last phase of the forward movement of the transport frame under the influence of the first hydraulic control means, locking means are engaged between the second member and the transport frame. When the transport frame is to be off-loaded, it is first moved rearwardly by the first hydraulic control means to unlock it from the second member. Thereafter, the second hydraulic control means is used to pivot the second member with respect to the first member so that the transport frame is moved rearwardly over the rear of the vehicle and dumped on the ground.
If the transport frame is to be tipped relative to the vehicle, the second hydraulic control means is actuated while the transport frame is still in the transport position, i.e. with the third member in its forwardmost position, and with the transport frame still locked to the second member. Under these conditions, the second and first members are held in line by the transport frame and, accordingly, the second hydraulic means causes the first member to pivot with respect to the vehicle instead of causing the second member to pivot on the first member.
If a vehicle of the kind described is to be used under difficult conditions or if additional safety is required, means may be provided to lock the transport frame to the vehicle chassis when it is in the transport position. These locking means may comprise hooks on the vehicle chassis and anchor members on the frame. With such a system, the transport frame cannot be tipped relative to the vehicle while it is in the transport position.
Accordingly, it is an object of the present invention to provide a vehicle in which the transport frame is locked to the chassis when it is in the transport position, and in which the transport frame can also be tipped relative to the vehicle if required.
From one aspect the invention consists in a road vehicle having a transport frame and means for moving the frame on to and off the vehicle, and also for tipping the frame relative to the vehicle; wherein a first member is pivotally mounted at or near the rear of the vehicle chassis; wherein a second member is pivotally mounted on the forward end of the first member; wherein a third member is slidable with respect to said second member, said third member carrying, or being integral with, an upstanding jib having a hook at its free end; wherein first hydraulic control means control sliding movement of said third member relative to said second member; wherein second hydraulic control means extend between the vehicle chassis and the second member to control said pivotal movements of said first and second members; wherein the frame can be moved on to the vehicle by engaging the hook in an upstanding member at the forward end of the frame, by pivotting the second member under the control of the second hydraulic control means, and by thereafter sliding the third member forward under control of the first hydraulic control means; wherein the final phase of the forward movement of the third member causes interegagement of locking means on the frame and the chassis; and wherein the frame can be tipped about the pivot axis of the first member under the control of the second hydraulic control means by moving the third member backwardly under the control of the first hydraulic control means sufficiently to disengage said locking means, said backward movement being such as to actuate, or maintain actuation of, means for preventing pivotal movement of said second member relative to said first member.
It is to be understood that, if the backward movement of the third member is continued beyond the tipping position, the means for preventing pivotal movement of the second member relative to the first member are released.
Accordingly, after the third member has been moved to its rearmost position relative to the second member, operation of the second hydraulic means will cause the second member to pivot with respect to the first member so that the transport frame can be off-loaded over the rear of the vehicle.
Preferably the means for preventing pivotal movement of the second member relative to the first member include a hydraulically operated lock. Preferably this lock includes pivotally mounted hooks on one of the members controlled by a double-acting hydraulic cylinder. These hooks are designed to cooperate with one or more anchor members on the other of the two members so that the hydraulic cylinder may be used to rotate the hooks between a latching position in which the hooks engage the anchor members, and an unlatched positioned in which the hooks are disengaged from the anchor members.The hydraulic control system may be such that the hooks are in the latching position when the transport frame is in either the transport position or the tipping position, or, alternatively, the hydraulic control system may be such that the hooks are only in the latching position when the transport frame is in the tipping position.
In addition to the means for preventing pivotal movement of the second member relative to the first member, means may also be provided to prevent relative movement between the transport frame and the second member when the transport frame is in the tipping position. These additional means may be of known form and consist, for example, of a hook on the second member which cooperates with a plate on the transport frame, the plate being slid under the hook during forward movement of the third member relative to the second member. Thus again these additional means may be engaged not only in the tipping position, but also in the transport position. Rearward movement of the third member relative to the second member from the tipping position to the unloading position of the transport frame will, on the other hand, disengage these additional means.
Preferably rollers are provided at the rear of the vehicle, and the transport frame includes two longitudinally extending rails which travel on these rollers while the transport frame is being loaded on to and off the vehicle. Furthermore, these rails rest on the rollers when the transport frame is in either the transport position or the tipping position.
In a preferred embodiment of the invention, locking means are provided to secure these rails to the rollers when the transport frame is in the tipping position. Preferably the rails include a substantially vertical web and a horizontal flange at the base of the web. It will be understood that this flange normally rests on the respective roller, and the locking means preferably are in the form of a pivotally mounted hook which engages one side of the base flange and locks it on the surface of the roller. The hooks are preferably pivotally mounted in such a way that they can be controlled by respective control members located on the axis of rotation of the rollers. Each control member may be in the form of a shaft coaxial with the axis of rotation of the rollers which is moved by a hydraulic cylinder also located on the axis of rotation of the rollers.In this arrangement, a hydraulic cylinder would be required for each roller. In an alternative arrangement, the control members extend towards the fore-and-aft axis of the vehicle and are then engaged by a plate provided with two angled slots. This plate is movable by means of a hydraulic cylinder, and the arrangement is such that movement of the plate in one direction causes the two control members to be moved inwardly with respect to the vehicle and movement of the plate in the opposite direction causes the two control members to be moved outwardly with respect to the vehicle.
Thus the single hydraulically cylinder can be used to engage and disengage the locking hooks on both the rollers.
From another aspect the invention consists in any features of novelty, taken singly or in combination, of the embodiment of the invention illustrated in the accompanying diagrammatic drawings, in which: Figure 1 is a side view of a part of a vehicle having a transport frame and means for loading and tipping the frame in accordance with the invention;
Figure 2 is a perspective view to a larger scale of the means for preventing pivotal movement of the second member relative to the first member; and
Figure 3 is a perspective view of the means for locking the transport frame rails to the rollers of the vehicle.
Figure 1 shows one of the main fore-and-aft chassis members 1 of a road vehicle and a transport frame 2 carried on the vehicle. The means for loading and tipping the frame on the vehicle include a first member or rear beam 3 pivotally mounted on the chassis member 1 at 4.
Pivotally mounted on the forward end of the rear beam 3 is a second member or front beam 5. The pivot axis is indicated at 1 6. A third member 1 6 is slidable with respect to the front beam and includes an upstanding jib 7 having a hook 8 at its free end. A hydraulic cylinder 9 is pivotally mounted on the vehicle chassis at 10, and the piston of this hydraulic cylinder is pivotally connected to the front beam at 11. A dual-action hydraulic cylinder 1 2 is connected to the front beam at 13, and the piston of this cylinder is connected to the third member 6 at 14.
The transport frame 2 includes an upstanding member 15 at its forward end, and this upstanding member is designed so that a portion thereof can be engaged by the hook 8. When the transport frame is to be lifted on to the vehicle, the piston of the cylinder 12 is retracted so that the jib 7 is moved rearwardly from the position shown in Figure 1. Thereafter the piston of the cylinder 9 is extended to cause the front beam 5, together with the third member 6 and the jib 7, to pivot about the axis 1 6 and possibly also at the end of the piston stroke about the axis 4. This causes the hook 8 to be located behind the vehicle in a position at which it can engage the upstanding member 1 5 if the transport frame 2 is standing on the ground behind the vehicle.Once the hook is engaged, the piston of the cylinder 9 is retracted so that the front beam 5, together with the third member 6 and the jib 7, is rotated anticlockwise, as seen in Figure 1, about the pivot axis 1 6. This action causes the frame 2 to be lifted over the rear of the vehicle with the rails on the base of the frame running on rollers 17 at the rear of the vehicle. Once the piston of the cylinder 9 has been retracted to the extent that the front beam 5 is in the position shown in Figure 1, the piston of the cylinder 12 is extended so that the transport frame is pulled by the jib 7 into the position shown in Figure 1. During the latter part of this sliding movement, an engagement plate 1 8 on the frame 2 slides under a hook (not shown) on the front beam locking the frame to this beam.In addition, during the final phase of this sliding movement, anchor members 1 9 on the frame slide under hooks 20 on the chassis of the vehicle, thus locking the frame to the vehicle chassis.
If the frame is to be unloaded from the vehicle, the sequence of operations described in the preceding paragraph is reversed. In other words, the piston of the cylinder 12 is retracted to move the transport frame rearwardly thus disengaging the anchor members 1 9 from the hooks 20, and also sliding the engagement plate 1 8 out of engagement with the hook on the front beam 5.
The piston of the cylinder 9 is then extended to rotate the front beam 5 about the axis 1 6 and thus move the frame 2 on the rollers 1 7 over the rear of the vehicle until it is dumped on the ground.
When the frame 2 is to be tipped in relation to the vehicle, the piston of the cylinder 12 is
retracted a short distance. As already stated, this cylinder is a dual-action cylinder, and the first stage of its movement disengages the anchor
members 19 from the hooks 20. However, at this stage, the plate 18 is still engaged beiow the hook on the front beam 5. In addition at this stage, a locking device 21 is actuated to lock the front beam 5 to the rear beam 3. It is to be understood that this locking device may be actuated by the first stage of the rearward movement of the frame or it may be actuated both when the piston of the cylinder 12 is fully extended and when it is retracted to its first stage.
In either case, the locking device 21 is released at the end of the second stage of retraction of the piston in the cylinder 12.
It is to be understood that, when the piston of the cylinder 9 is extended with the locking device 21 actuated and the piston of the cylinder 12 at its first stage of retraction, the front and rear beams, together with the frame, will be rotated about the axis 4. Thus the frame 2 will be tipped relative to the vehicle, but will not move rearwardly over the back of the vehicle.
The locking means 21 are shown in more detail in Figure 2, and it will be seen that they comprise a channel member 22 with end plates 23 and 24, and intermediate plates 25 and 26. These plates support a pivot pin 27 for a pair of latches 28 and 29 which are fixed to the pivot pin. Also fixed to the pivot pin are a pair of arms 30 and 31 to which is pivotally attached the end 32 of the piston rod of a hydraulic cylinder 33. When the piston rod is extended, the pivot pin 27 is rotated clockwise as seen in Figure 2 to disengage the latches 28 and 29 from an anchor member on the forward end of the rear member 3. When the piston rod of the cylinder 33 is retracted, the pivot pin 27 is rotated anticlockwise so that the hooked ends of the latches 28 and 29 engage the anchor member at the end of the rear member 3.
To provide additional security during tipping of the frame 2, means illustrated more particularly in
Figure 3 are shown for locking the flanges of the rails 34 to the rollers 1 7. These locking means comprise hooks 35 pivotally mouunted on the shaft about which the rollers 1 7 are rotatable. The pivot axis of the hook 35 is shown at 36, and it will be seen that it may be moved by means of a shaft 37 from the locking position illustrated in
Figure 3 to a position in which the hook releases the flange of the rail 34. The axial motion of the shaft 37 may be produced by means of a hydraulic cylinder located on the axis of rotation of the rollers. This arrangement would require a hydraulic cylinder for each roller and, in an alternative embodiment shown in Figure 3, a single hydraulic cylinder 38 is used. The piston rod of this cylinder carries a slotted plate 39. The two slots diverge from the longitudinal axis of the piston, and the plate passes through a guide member 40. The inner end of each of the shafts 37 is provided with a pin which is located in the corresponding one of the two diverging slots 41 and 42. Thus when the piston of the cylinder 38 is extended, the two shafts 37 are moved laterally outwardly, thus engaging the locks of both rollers.
When the piston of the cylinder 38 is retracted, the two shafts 37 are also retracted thus releasing the hooks 35 of both rollers.
Claims (15)
1. A road vehicle having a transport frame and means for moving the frame on to and off the vehicle, and also for tipping the frame relative to the vehicle; wherein a first member is pivotally mounted at or near the rear of the vehicle chassis; wherein a second member is pivotally mounted on the forward end of the first member; wherein a third member is slideable with respect to said second member, said third member carrying, or being integral with, an upstanding jib having a hook at its free end; wherein first hydraulic control means control sliding movement or: said third member relative to said second member; wherein second hydraulic control means extend between the vehicle chassis and the second member to control said pivotal movements of said first and second members; wherein the frame can be moved on to the vehicle by engaging the hook in an upstanding member at the forward end of the frame, by pivotting the second member under the control of the second hydraulic control means, and by thereafter sliding the third member forward under control of the first hydraulic control means; wherein the final phase of the forward movement of the third member causes interengagement of locking means on the frame and the chassis; and wherein the frame can be tipped about the pivot axis of the first member under the control of the second hydraulic control means by moving the third member backwardly under the control of the first hydraulic control means sufficiently to disengage said locking means, said backward movement being such as to actuate, or maintain actuation of, means for preventing pivotal movement of said second member relative to said first member.
2. A road vehicle as claimed in Claim 1, wherein said means for preventing pivotal movement of the second member include a hydraulically operated lock.
3. A road vehicle as claimed in Claim 2, wherein said lock includes pivotally mounted
hooks on one of the members controlled by a
double acting hydraulic cylinder and wherein said
hooks cooperate with one or more anchor
members on the other of said two members so that the hydraulic cylinder may be used to rotate the hooks between a latching position in which
the hooks engage the anchor members, and an
unlatched position in which the hooks are
disengaged from the anchor members.
4. A road vehicle as claimed in Claim 3,
wherein the hydraulic control system is such that the hooks are in the latching position when the
transport frame is in either the transport position
or the tipping position.
5. A road vehicle as claimed in Claim 3,
wherein the hydraulic control system is such that
the hooks are in the latching position only when
the transport frame is in the tipping position.
6. A road vehicle as claimed in any of the
preceding Claims, further including means for
preventing relative movement between the
transport frame and the second member, when the transport frame is in the tipping position.
7. A road vehicle as claimed in Claim 6, wherein said means for preventing relative movement between the transport frame and the second member comprise a hook on the second member, which cooperates with a plate on the transport frame, the plate being slid under the hook during forward movement of the third member relative to the second member.
8. A road vehicle as claimed in Claim 7, wherein said means for preventing relative movement between the transport frame and the second member are engaged not only in the tipping position but also in the transport position.
9. A road vehicle as claimed in any of the preceding Claims, wherein rollers are provided at the rear of the vehicle and wherein the transport frame includes two longitudinally extending rails which travel on the rollers, while the transport frame is being loaded on to and off the vehicle and which rest on the rollers when the transport frame is in either the transport position or the tipping position.
10. A road vehicle as claimed in Claim 9, wherein locking means are provided to secure the rails to the rollers when the transport frame is in the tipping position.
11. A road vehicle as claimed in Claim 10, wherein the rails include a substantially vertical web and a horizontal flange at the base of the web, which flange normally rests on the respective roller, and wherein the locking means are in the form of a pivotally mounted hook which engages one side of the base flange and locks it on to the surface of the roller.
12. A road vehicle as claimed in Claim 11, wherein the hooks are pivotally mounted in such a way that they can be controlled by respective control members located on the axis of rotation of the rollers.
13. A road vehicle as claimed in Claim 12, wherein each control member is in the form of a shaft coaxial with the axis of rotation of the rollers, said shaft being movable by a hydraulic cylinder also located on the axis of rotation of the rollers.
14. A road vehicle as claimed in Claim 12, wherein each control member is in the form of a shaft coaxial with the axis of rotation of the rollers, said shafts extending towards the fore and aft axis of the vehicle where they are engaged by a plate provided with two angied slots.
15. A road vehicle as claimed in Claim 14, wherein said plate is movable by means of a hydraulic cylinder, the arrangement being such that movement of the plate in one direction causes the two control members to be moved inwardly with respect to the vehicle, and movement of the plate in the opposite direction causes the two control members to be moved outwardly with respect to the vehicle.
1 6. A road vehicle as hereinbefore described with reference to, and as illustrated in, any of the accompanying diagrammatic drawings.
1 7. Any features of novelty taken singly or in combination of the road vehicle hereinbefore described with reference to the accompanying diagrammatic drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08138709A GB2112357B (en) | 1981-12-23 | 1981-12-23 | Improvements in or relating to load-carrying road vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08138709A GB2112357B (en) | 1981-12-23 | 1981-12-23 | Improvements in or relating to load-carrying road vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2112357A true GB2112357A (en) | 1983-07-20 |
| GB2112357B GB2112357B (en) | 1985-02-06 |
Family
ID=10526799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08138709A Expired GB2112357B (en) | 1981-12-23 | 1981-12-23 | Improvements in or relating to load-carrying road vehicles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2112357B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135658A (en) * | 1983-02-28 | 1984-09-05 | Gote Hakansson | Trailer arrangement |
| EP1681201A1 (en) * | 2005-01-12 | 2006-07-19 | Franz Xaver Meiller Fahrzeug- und Maschinenfabrik-GmbH & Co KG | Container changer |
-
1981
- 1981-12-23 GB GB08138709A patent/GB2112357B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135658A (en) * | 1983-02-28 | 1984-09-05 | Gote Hakansson | Trailer arrangement |
| EP1681201A1 (en) * | 2005-01-12 | 2006-07-19 | Franz Xaver Meiller Fahrzeug- und Maschinenfabrik-GmbH & Co KG | Container changer |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2112357B (en) | 1985-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931223 |