GB2112358A - Improvements in or relating to load-carrying road vehicles - Google Patents
Improvements in or relating to load-carrying road vehicles Download PDFInfo
- Publication number
- GB2112358A GB2112358A GB08236344A GB8236344A GB2112358A GB 2112358 A GB2112358 A GB 2112358A GB 08236344 A GB08236344 A GB 08236344A GB 8236344 A GB8236344 A GB 8236344A GB 2112358 A GB2112358 A GB 2112358A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vehicle
- chassis
- frame
- hooks
- transport frame
- 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
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)
- Jib Cranes (AREA)
Abstract
This invention relates to load- carrying vehicles having means (1-4) for hoisting a transport frame (6) on to the vehicle and off-loading from the vehicle. In order to secure the frame (6) positively to the vehicle chassis (7), hooks (9) are provided on the chassis to co-operate with anchor members (10) on the transport frame as the frame is moved forwardly with respect to the chassis into the transport position. Preferably, the hooks are resiliently mounted and serve to limit forward, upward and lateral movement of the frame. In addition, pneumatically releasable locking means are provided to prevent rearward movement of the frame. <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.
Various systems are known for hoisting loads on to 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 which forms a part of the load, or of a container therefor, or to which the load is secured. The invention will be described with reference to the case in which the frame is separate from the load or the container, but it is to be understood that it is equally applicable to arrangements in which the frame forms part of, or is permanently secured to, either a load or a container or other demountable body.
When a load is to be hoisted on to a vehicle, 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 and, if necessary, the vehicle is manoeuvred 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 eventually 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 rearward portion which is pivotally mounted on the vehicle, and a forward portion which is axially slidable with respect to the rearward portion. A jib is upstanding from the forward portion, and the hook is carried at the free end of the jib. Sliding movement of the forward portion with respect to the rearward portion is hydraulically controlled and, when the transport frame is to be lifted over the rear of the vehicle, the forward portion, together with the jib, are moved to their rearwardmost position by this hydraulic control.Once the frame has been lifted on to the vehicle and the pivotting motion has been continued until the lifting arm is substantially horizontal and the jib substantially vertical, the forward portion, together with the jib, is moved forwardly with respect to the rearward portion so that the frame is moved forwardly into the transport position.
In known systems of the kind described, the transport frame is maintained in position on the vehicle during transport by means of the hydraulic control system. Thus the forward portion of the lifting arm is hydraulically locked in its forwardmost position, and the rearward portion of the lifting arm is hydraulically locked in the position in which it is substantially horizontal.
This hydraulic locking is normally sufficient to keep a transport frame in position on the vehicle.
However, if the vehicle is to be used under difficult conditions, or if additional safety is required, the hydraulic locking may not be regarded as sufficient. Accordingly it is an object of the present invention to provide a simple mechanical locking system to supplement the hydraulic locking of known systems.
From one aspect the invention consists in a load-carrying road vehicle including a transport frame; rollers at or near the rear of the vehicle; a hydraulically controlled lifting arm pivotally mounted on the vehicle; and a jib upstanding from the forward end of a hydraulically controlled member telescopically slidable with respect to said lifting arm, said jib being provided with a hook adapted to cooperate with an upstanding member at the forward end of the transport frame, and the jib and lifting arm being arranged to move the transport frame on said rollers, wherein a plurality of hooks are provided on the vehicle, and a corresponding plurality of anchor members are provided on the transport frame, the arrangement being such that, as the frame is moved forwardly on the rollers into its transport position, the anchor members slide under the hooks to lock the frame to the vehicle.
Preferably at least some of the hooks are resiliently mounted on the vehicle chassis to provide flexibility of engagement of the transport frame, and to allow the vehicle chassis to flex under severe conditions while carrying a torsionally rigid load.
It is, of course, to be understood that, with a vehicle in accordance with the two preceding paragraphs, the transport frame is restrained vertically with respect to the vehicle. With appropriate design of the anchor members, it will also be restrained laterally. However, the only restraint preventing the frame from moving rearwardly over the rollers with respect to the vehicle is provided by the hydraulic locking.
Accordingly, in accordance with a subsidiary feature of the invention, further locking means are provided to positively restrict movement of the frame rearwardly with respect to the vehicle. The further locking means are preferably in the form of a pivotally mounted latch having a latching surface which is substantially vertical in the locked position, said latching surface being so located that it engages the rear of one of the anchor members on the transport frame.
Preferably spring means are provided to urge the latch member into the locked position, and pneumatic means are provided to rotate the latch member against the action of the spring away from the locked position, to a position in which the anchor member can clear the latch member when the transport frame is moved rearwardly with respect to the vehicle for unloading purposes.
It is to be understood that the further locking means may be provided in association with each of the hooks or, in certain circumstances, it may be sufficient to provide the further locking means only in association with one or two of the hooks.
In an aiternative arrangement the further locking means are arranged to cooperate with one or more anchor members on the transport frame additional to the anchor members which cooperate with the hook.
The lifting arm is preferably pivotably mounted directly on the vehicle chassis and similarly the rollers are also mounted directly on the chassis. In these circumstances, the hooks and the further locking means, if provided, are also mounted directly on the chassis. This is not normally possible in known vehicles because the chassis is not designed in such a way that the lifting arm and the hydraulic control system can fit in between the chassis members and the transport frame. Accordingly, it is normal practice to provide an additional frame above the vehicle chassis, said additional frame being designed to receive the lifting arm, the rollers and the hydraulic control system. However, in accordance with the invention, it is preferred that the vehicle be specially designed so that the additional frame is not required.This involves primarily redesigning all, or some, of the various transverse members of the chassis so that the lifting arm and hydraulic control system can be accommodated between the main longitudinal chassis members.
From another aspect the invention consists in any features of novelty, taken singly or in combination, of the vehicle shown in the accompanying diagrammatic drawings, in which Figure 1 is a perspective view of a vehicle in accordance with the invention with an empty transport frame or skeletal body underframe being loaded on to the vehicle;
Figure 2 is a perspective view of one hook and associated further locking means on a vehicle as illustrated in Figure 1;
Figures 3 and 4 are perspective views of alternative forms of hook;
Figure 5 is a side view of the hook shown in
Figure 3 and the locking means shown in Figure 2 with the corresponding anchor member in position; and
Figure 6 is a plan view of the apparatus shown in Figure 5.
The vehicle illustrated in Figure 1 includes a lifting arm 1 pivotally mounted on the vehicle and controlled by a pair of hydraulic cylinders 2. The lifting arm includes a forward member which is telescopically slidable therein under the control of a further hydraulic cylinder within the lifting arm.
The forward member includes a jib 3, the free end of which is provided with a hook 4 designed to engage a bar located near the top of an upstanding member 5 forming part of a transport frame 6. The vehicle includes main longitudinal chassis members 7, and the frame 6 includes main longitudinal members 8. Rollers are provided at the rear end of the chassis to engage the two longitudinal members 8.
When the frame 6 is to be loaded on to the vehicle, the vehicle is reversed into position so that the rear of the vehicle is close to the upstanding member 5 of the frame. The hydraulic
control system is operated to rotate the lifting arm
1 to enable the hook 4 to engage the arm on the
upstanding member 5. Under these conditions,
the jib 3 in its inner-most position as illustrated in
Figure 1. The hydraulic control system is then
used to rotate the lifting arm 1 anticlockwise as
seen in Figure 1 so that the transport frame 6 is
drawn over the rear of the vehicle and moves
forwardly on the rollers. When the lifting arm 1
reaches the horizontal position, the jib 3 is
extended from the lifting arm by the further
hydraulic control cylinder so that the frame is
moved into its transportion position with the
upstanding member 5 located close to the rear of
the vehicle cab.
In accordance with the invention, four hooks
are provided on the longitudinal members 7 of the
vehicle chassis. Three of these hooks are
indicated by the reference numeral 9 in Figure 1,
and they can be seen in more detail in the
remaining Figures. Anchor members to cooperate
with the hooks 9 are provided on the main
longitudinal members 8 of the transport frame,
and the positions of these four anchor members
are indicated in Figure 1 by the reference numeral
10. A side view of one of the anchor members 10
is shown in Figure 5.
It will be seen that, during the final stage of
forward movement of the transport frame on to
the vehicle, the anchor members 10 will engage
under the free ends of the hooks 9, and the hooks
9 will thus inhibit vertical motion of the transport
frame relative to the vehicle chassis.
In order to enable the hooks 9 also to prevent
lateral movement of the frame 6 relative to the
vehicle, the anchor members are constructed in
the form of pockets. Each pocket is formed by
means of a channel member extending laterally
from one of the longitudinal members 8, and
supported at its free end by a plate depending
from one of the main transverse members of the
frame.
The two hooks 9 at the forward end of the
chassis are resiliently mounted on the chassis
members, and the two hooks at the rear of the
chassis may also be resiliently mounted. Three
alternative forms of resilient mounting are shown
in Figure 2, 3 and 4.
In the arrangement shown in Figure 2, a pair of
trunnions 21 are welded to the upper flange of
the chassis member 7, and a lever arm 22 is
pivotally mounted between these trunnions.
Rubber blocks 23 are provided between the 'chassis member and the left-hand end of the lever
(as seen in Figure 2). The right-hand end of the
lever 22 is slightly tapered to assist in
engagement of the lever with the respective
anchor member. It will be understood that the
right-hand end of the lever can be raised slightly
by the anchor member as a result of compression
of rubber blocks 23.
In the arrangement shown in Figure 3, the lever
22 is mounted to one side of a single mounting
block 24. Rubber blocks 23 are again used
between one end of the lever and the chassis but, in this case, an extension 25 is formed on the side of the chassis member to cooperate with the rubber blocks.
In the arrangement shown in Figure 4, a lever 26 is pivotally mounted on the side of the chassis member 7. Rotation of the lever in an anticlockwise direction (as seen in Figure 4) is limited by a stop member 27, and clockwise rotation is limited by rubber blocks 28 provided between the front face 29 of the lever and a further stop 30 welded to the side of the chassis member 7.
To prevent rearward motion of the transport frame relative to the vehicle, further locking means are provided as indicated in Figures 2, 5 and 6. The further locking means include a pivotally mounted latch 11 having a substantially vertical locking surface 12 located, when the latch is in the locked position (as indicated in the drawings) substantially in the plane of the open end of the respective hook 9. When the latch is in this condition, it can be seen from Figure 5 that the channel portion of the anchor member 10 is trapped between the vertical face 12 of the latch 11 and the vertical faces 13 of the trunnions 21.
Thus fore-and-aft movement of the transport frame relative to the vehicle chassis is positively prevented.
Preferably the latch 11 is moved into the locking position as shown by a spring located in a pneumatic cylinder 14. The pneumatic cylinder includes a piston which is pulled into the cylinder by means of the spring so that the latch is urged in an anticlockwise direction about its pivot axis as seen in Figures 2 and 5. As can be seen from
Figures 2 and 5, each latching member 11 is provided with an inclined rearward face 1 5. Thus, when the lifting frame 6 is being moved forwardly on the chassis members 7, the channel portions of the anchor members 10 will rotate the latches in a clockwise direction as seen in Figures 2 and 5 against the action of the springs.The clockwise rotation will enable the anchor members to pass over the latches and, when the channel portions are completely within the hooks, the latches will be returned to the locking positions by their respective springs.
When the transport frame is to be off-loaded from the vehicle, air is introduced into the cylinders 14 to rotate the latches in the clockwise direction against the action of the springs. This will then enable the transport frame 6 to be moved rearwardly by the hydraulic system without interference from the latches.
Although the chassis of the vehicle is not shown in detail, it can be seen from Figures 1 that the lifting arm 1 and the cylinders 2 are pivotally mounted direct on the main chassis members 7. It will therefore be understood that the transverse members between the longitudinal members 7 are suitably shaped to enable the lifting arm 1 and the cylinders 2 to be accommodated between the longitudinal members 7 when the lifting arm 1 has been rotated anticlockwise into the position in which the lifting arm 1 is horizontal.
The invention has been described with reference to vehicles in which the jib and forward portion of the lifting arm are axially slidable together with respect to the rearward portion of the arm. However, it is to be understood that the invention is also applicable to vehicles in which the jib is pivotable with respect to the forward portion of the arm or in which the forward portion of the arm is pivotable with respect to the rearward portion. The only essential requirement is that the hydraulic lifting system is such that the transport frame slides forwardly with respect to the vehicle chassis during the last phase of the on-loading and slides rearwardly with respect to the vehicle chassis during the first phase of the off-loading operation.
Claims (1)
- Claims1. A load-carrying road vehicle including a transport frame; rollers at or near the rear of the vehicle; a hydraulically controlled lifting arm pivotally mounted on the vehicle; and a jib upstanding from the forward end of a hydraulically controlled member telescopically slidable with respect to said lifting arm, said jib being provided with a hook adapted to cooperate with an upstanding member at the forward end of the transport frame, and the jib and lifting arm being arranged to move the transport frame on said rollers, wherein a plurality of hooks are provided on the vehicle, and a corresponding plurality of anchor members are provided on the transport frame, the arrangement being such that, as the frame is moved forwardly on the rollers into its transport position, the anchor members slide under the hooks to lock the frame to the vehicle.2. A vehicle as claimed in Claim 1, wherein at least some of the hooks are resiliently mounted on the vehicle chassis.3. A vehicle as claimed in Claim 2, wherein each of the resiliently mounted hooks comprises a pair of trunnions secured to a vehicle chassis member; a lever arm pivotally mounted in said trunnions; and spring means resiliently opposing movement of the forward end of said lever arm towards the chassis.4. A vehicle as claimed in Claim 2, wherein each of the resiliently mounted hooks comprises a mounting block secured to a vehicle chassis member; a lever arm pivotally mounted on one side of said mounting block; and spring means resiliently opposing movement of the forward end of said lever arm towards the chassis.5. A vehicle as claimed in Claim 4, including an extension formed on the side of the chassis to cooperate with said spring means.6. A vehicle as claimed in Claim 2, wherein each of said resiliently mounted hooks comprises a lever pivotally mounted on the side of a chassis member; stop means for limiting rotation of said lever in one direction; and resilient means for opposing rotation of said lever in the opposite direction.7. A vehicle as claimed in any of Claims 3 to 6, wherein the rear end of the lever arm is tapered to assist in engagement of the respective anchor member with the lever arm.8. A vehicle as claimed in any of Claims 3 to 7, wherein said spring means consist of rubber blocks.9. A vehicle as claimed in any of the preceding Claims, wherein said anchor members are designed so that they restrain the transport frame laterally as well as vertically.10. A vehicle as claimed in any of the preceding Claims, including locking means to positively restrict movement of the frame rearwardly with respect to the vehicle.1 A vehicle as claimed in Claim 10, wherein said locking means comprise a pivotally mounted latch having a latching surface which is substantially vertical in the locked position, said latching surface being so located that it engages the rear of one of the anchor members on the transport frame.1 2. A vehicle as claimed in Claim 1 wherein spring means are provided to urge each latch member into the locked position and pneumatic means are provided to rotate each latch member against the action of the respective spring means away from the locked position to a position in which the anchor member can clear the latch member when the transport frame is moved rearwardly with respect to the vehicle for unloading purposes.13. A vehicle as claimed in Claims 10 to 12, wherein said locking means are provided in association with each of said hooks.14. A load-carrying road vehicle substantially as hereinbefore described with reference to, and as illustrated in, the accompanying diagrammatic drawings.15. Any features of novelty, taken singly or in combination of the load-carrying road vehicle as hereinbefore described with reference to the accompanying diagrammatic drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08236344A GB2112358B (en) | 1981-12-23 | 1982-12-21 | Improvements in or relating to load-carrying vehicles |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8138708 | 1981-12-23 | ||
| GB08236344A GB2112358B (en) | 1981-12-23 | 1982-12-21 | Improvements in or relating to load-carrying vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2112358A true GB2112358A (en) | 1983-07-20 |
| GB2112358B GB2112358B (en) | 1985-05-22 |
Family
ID=26281607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08236344A Expired GB2112358B (en) | 1981-12-23 | 1982-12-21 | Improvements in or relating to load-carrying vehicles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2112358B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144225A1 (en) * | 1983-12-07 | 1985-06-12 | T.T. Boughton & Sons Limited | Improvements in or relating to load carrying road vehicles |
| EP0152159A1 (en) * | 1984-01-12 | 1985-08-21 | T.T. Boughton & Sons Limited | Improvements in or relating to load carrying vehicles |
| US4755097A (en) * | 1985-03-11 | 1988-07-05 | Bennes Marrel | Device for the handling and transfer of a load on a vehicle such as a container or a tray |
| US4840532A (en) * | 1986-03-03 | 1989-06-20 | Galbreath Incorporated | Roll-off hoist for variable positioning of containers |
| EP0993986A3 (en) * | 1998-10-15 | 2003-05-14 | A.T.I.B. S.r.l. | Equipment for dumper or tipping trucks |
-
1982
- 1982-12-21 GB GB08236344A patent/GB2112358B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144225A1 (en) * | 1983-12-07 | 1985-06-12 | T.T. Boughton & Sons Limited | Improvements in or relating to load carrying road vehicles |
| US4589671A (en) * | 1983-12-07 | 1986-05-20 | T. T. Boughton & Sons Ltd | Load carrying road vehicles |
| EP0152159A1 (en) * | 1984-01-12 | 1985-08-21 | T.T. Boughton & Sons Limited | Improvements in or relating to load carrying vehicles |
| US4755097A (en) * | 1985-03-11 | 1988-07-05 | Bennes Marrel | Device for the handling and transfer of a load on a vehicle such as a container or a tray |
| US4840532A (en) * | 1986-03-03 | 1989-06-20 | Galbreath Incorporated | Roll-off hoist for variable positioning of containers |
| EP0993986A3 (en) * | 1998-10-15 | 2003-05-14 | A.T.I.B. S.r.l. | Equipment for dumper or tipping trucks |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2112358B (en) | 1985-05-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941221 |