CA2003605C - Apparatus for loading objects on a carriage conveyor and for unloading them therefrom - Google Patents
Apparatus for loading objects on a carriage conveyor and for unloading them therefromInfo
- Publication number
- CA2003605C CA2003605C CA 2003605 CA2003605A CA2003605C CA 2003605 C CA2003605 C CA 2003605C CA 2003605 CA2003605 CA 2003605 CA 2003605 A CA2003605 A CA 2003605A CA 2003605 C CA2003605 C CA 2003605C
- Authority
- CA
- Canada
- Prior art keywords
- lift platform
- arms
- conveyor
- carriage
- joints
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/82—Rotary or reciprocating members for direct action on articles or materials, e.g. pushers, rakes, shovels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Intermediate Stations On Conveyors (AREA)
- Loading Or Unloading Of Vehicles (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
This publication discloses an apparatus for loading and unloading objects, in particular cylindrical objects, on a continuously operating carriage conveyor. The apparatus comprises a fixed frame (3) and a lift platform (4), which are connected by arms (6, 7, 8) to each other so that one end of each arm is attached to the frame (3) while the other end is attached to the lift platform (4). When the lift platform (4) is pulled with the help of a hydraulic cylinder (16), the arms (6, 7, 8) are rotated and the platform (4) is shifted both horizontally and vertically.
An advantage of the apparatus in accordance with the invention is that the object to be loaded reaches an equal speed with that of the conveyor carriage (2) at the time the object touches the carriage (2).
An advantage of the apparatus in accordance with the invention is that the object to be loaded reaches an equal speed with that of the conveyor carriage (2) at the time the object touches the carriage (2).
Description
An apparatus for lo~A 1 n~ objects on a carriage conveyor and for -nl o~A~ ng them therefrom The present invention relates to an apparatus in accordance with the preamble of claim 1 for loading and unloading objects on a carriage conveyor.
Carriage conveyors are used in mills and production plants, particularly for moving solid ob;ects. The carriage conveyor line is used for transferring materials such as paper rolls, packaging cartons and ore. The transfer carriage is movable in the factory along a dedicated track. The track comprises a chain sliding in a guide rail that pulls carriages attached at equal spacings to the chain. The carriages are thereby moved on rails mounted to the conveyor track. Different constructions of the conveyor carriage and track are also feasible. The structure of the track is dependent on the material being transferred and the desired track layout in the factory premises.
An advantage of the carriage conveyor over other types of con-veyors is that it is suitable for transferring material over greater lengths. Further, there is no need for shifting material from one conveyor to another in corners or in rising or falling slopes. The object placed in the conveyor carriage remains transversally stationary in relation to the track until trans-ferred away from the track.
The carriage conveyor is aptly suitable for the transfer of paper rolls in paper mills. The conveyor of paper rolls can be an intermittently operating conveyor, whereby the conveyor must be stopped when material is desired to be loaded on the conveyor at any station; or alternatively, a continuously operating conveyor allowing the material to be loaded onto the moving conveyor.
The intermittently operating conveyor is most appropriately used in locations having only a small number of loading and unloading stations and in which the required transport capacity is small and correspondingly the necessary transfer distances are relatively short. Stopping the conveyor for loading and `~' unloading decreases transport capacity and increases required transfer time. The lntermlttently operatlng conveyor can be stopped at regular intervals, whereby the loading of transferred material takes places at constant intervals during the stops of the conveyor. Hereln the material to be loaded must be at the loading station ready waiting for the stopping of the conveyor.
The conveyor can also be stopped at the reception of a stop command from the loadlng station. In this application the stop tlme of the conveyor remains slightly smaller than that required for a conveyor stopping at regular intervals, especially in the case where there is only a small number of loading stations.
In the continuously operating conveyor the material to be transferred -is loaded onto the conveyor while in motion. Sloping ramps or different kinds of hoisting equipment can be used for transferring the ob;ects on the conveyor. Ramps are advantageous-ly used at the loading stations when handling cylindrical objects such as paper rolls. When the roll is desired to be transferred onto the conveyor, the roll is pushed down a ramp onto the conveyor for transfer and then taken therefrom with the help of a receiver apparatus. The roll is rapidly accelerated to the conveyor speed by the effect of the frictional force exerted on the roll by the conveyor. When the roll is desired to be trans-ferred off the conveyor, it is pushed with a pusher from the conveyor track onto a ramp. The roll can also be lifted onto the conveyor track and back with the help of different kinds of hoisting equipment. When using hoisting equipment, the roll is kept stationary in relation to the transfer direction of the conveyor until the roll is lowered onto the conveyor, whereby the roll is accelerated to the speed of the conveyor by friction-al forces.
Although the speed of carrlages and track motion in carriage conveyors generally is relatively low, a start jolt will be exerted on the object to be transferred onto the conveyor that may cause damage to the ob;ect. Equally, frictional slippage at the encountering point of the roll with the recelver or pusher equipment can cause damage to the roll. To reduce damages to the rolls, pushers and receivers have been developed capable of complying with the roll motion when the roll is being transferred from the stationary support onto the conveyor track, and cor-respondingly, when the roll is being transferred back from thetrack onto a support base. This kind of an implementation avoids damaging the roll at the encountering point of the roll with the pusher or receiver equipment. The implementation reduces roll damages, but since slippage between roll and the track as well as between the roll and the unloading ramp still occurs, damages cannot be totally avoided. Consequently, continuously operating carriage conveyors have not been applicable in the handling of delicate or mechanically fragile grades of paper.
Since the equalization of speed difference between the roll and the track occurs under the influence of slippage and fric-tional forces, the equalization does not take place in a consis-tent manner, whereby the roll position on the track and in the carriage varies in a random manner and is dependent on the roll size. Variations in the transport path and position of the roll causes disturbance at loading stations and difficulties in the synchronization and control of the conveyor system.
The present invention aims to achieve such a loading and unload-ing apparatus for a carriage conveyor that avoids slippage of and damage to the ob;ect to be loaded or unloaded.
The invention is based on accelerating the object to be trans-ferred onto the carriage conveyor to an equal speed with the conveyor prior to the lowering of the object onto the conveyor.
More specifically, the apparatus in accordance with the invention is characterized by what is stated in the characterizing part of claim 1.
The invention provides significant benefits.
Slippage does not occur during loading and unloading of rolls allowing carriage conveyors to be used for handling and trans-ferring also mechanically fragile paper grades. Losses incurred by scratching are avoided, because frictional slippage does not occur. Improved easiness of synchronization of the loading and unloading stations with the track is also achieved over earlier designs. The advantage of the apparatus in accordance with the invention is that the reception of rolls at a station and the delivery of rolls from a station as well as the loading of rolls onto the carriage and the unloading of rolls from the carriage are entirely independent events, which can be controlled to take place in a consistent manner irrespective of the roll's dimensions. In apparatuses of earlier design the combined roll delivery/fetching was a single phase taking place during carriage loading/unloading, and since the equalization of speed difference between the roll and the track was based on frictional forces and slippage, the equalization of speed difference was partially random by its nature and also partly dependent on the roll's dimensions. This has been contributing to variations in the transfer path of the roll and disturbance in the operation of the system. The apparatus in accordance with the invention helps maintain the consistency of the roll transfer path, whereby the operational reliability of the system is improved.
The invention is next examined with the help of the attached drawings.
Figure 1 is a front view of an apparatus in accordance with the invention.
Figure 2 is a side view of the apparatus shown in Fig. 1.
Fig. 1 in the center illustrates a track 1 of the carriage conveyor with a carriage 2 running along the track 1 through the center of the apparatus. The loading apparatus has its frame 3 constructed so as to have its side parts located at opposite sides of the track 1 and joined together by beams positioned under the track 1. The frame 3 has a lift platform~
4 pivotally attached to it by four arms. The lift platform 4 comprises two parts placed at opposite sides of the track and joined by beams placed under the track 1. Arms 6 and 8 are attached at their lower ends by pivotal joints 11 and 15 to the lift platform 4 and at their upper ends by pivotal joints 10 and 14 to the frame 3.
Illustrated in Fig. 1 is a loading ramp 5 to the left of the loading apparatus and a receiver 18 to the right. The receiver is shown with dashed lines in its outermost and home positions.
The loading apparatus is suitable for rolls of different sizes.
20036~s Illustrated in the figure is a large roll 19 and small roll 20.
soth rolls can be received with the receiver 18 and lowered onto a carriage 2 without the need for any separate adjustments.
Rolls 19, 20 are always aligned in a consistent manner onto the carriage 2 at its center line.
Fig. 2 shows the apparatus illustrated in Fig. 1 in a side view. In the figure the transfer direction of the carriage 2 of the carriage conveyor is according to the arrow from the right to the left. The loading apparatus is shown in its lower position, while its upper position is shown with dashed lines 17. When the roll 19 to be loaded onto the carriage 2 enters the ramp 5, the lift platform 4 is pulled by a hydraulic cylinder 16 to the opposite direction from the transfer direction of the carriage 2. Since the arms 6 and 7 are mounted to the fixed frame 3 by the pivotal joints 10 and 12 at their upper ends and by the pivotal joints 11 and 13 to the lift platform 4, the arms 6 and 7 are rotated about the upper pivotal joints 10 and 12. The lift platform 4 and the apparatus frame are correspond-ingly joined on the other side of the track by arms and pivotal joints. The lift platform 4 is capable of moving in the opposite direction to the transfer direction of the carriage 2 as well as upward. The arms 6 and 7 are pivotally rotatable about the upper pivotal joints 10 and 12, whereby the lower pivotal joints 11 and 13 are transferred upward and opposite to the transfer direction of the carriage 2 along the circumference of a circle whose radius is equal to distance of the upper pivotal joints 10 and 12 from the lower pivotal joints 11 and 13. The distance from the pivotal joints 10 and 12 to the pivotal joints 11 and 13 as well as the travel of the hydraulic cylinder 16 are determined so as to make the vertical shift h of the lower pivotal joints 11 and 13 to be equal to height difference between the loading level of the carriage 2 and the level of the ramp 5.
When the lift platform 4 has reached its upper position shown in dashed lines 17, the roll 19 is pushed along the ramp 5 onto the lift platform 4. The roll 19 is received by the receiver 18, which slows down the speed of the roll 19 and stops the roll 19 onto the lift platform 4. The roll 19 is then transferred from the lift platform 4 to the carriage 2 in the following manner: When the carriage 2 is at a correct position between 200360S ~
the side parts of the lift platform 4, the lift platform 4 is shifted by the hydraulic cylinder 16 in the transfer direction of the carriage 2. Supported by the arms 6 and 7 and rotating about the upper pivotal joints 10 and 12, the lift platform 4 is shifted in the transfer direction of the carriage 2 and downward. The lift platform 4 and the roll 19 resting on it gain a velocity corresponding to the transfer speed and direction of the carriage 2, and when the arms 6 and 7 have reached an almost vertical position, the speeds of the carriage 2, the roll 19 and the lift platform 4 will be equal. At this instant the roll 19 makes contact with the loading base of the carriage 2. The lift platform 4 attains a slightly lower position allowing the roll 19 to remain in the carriage 2. The stopping of the lift platform motion is assured with a back stop 9.
The apparatus in accordance with the invention can also be used as an unloading apparatus. In this implementation the apparatus is placed relative to the track 1 so that the lift platform is movable by the hydraulic cylinder so that the motion direction of the lift platform 4 and the cylinder 16 is the same as the transfer direction of the carriages 2. When the transfer direction of the carriage 2 is as shown by the arrow in Fig. 2, the apparatus must be oriented to the opposite direction from that shown in the figure, that is, the apparatus must have the end containing the cylinder 16 to the left.
The operation of the loading apparatus and the carriage conveyor are synchronized using conventional motion detectors.
The construction of the apparatus in accordance with the inven-tion can be varied from the embodim~nt described above. The hydraulic cylinder used in the described implementation can be replaced by any actuator means capable of exerting a linear motion such as a recirculating ball nut and screw combination.
Instead of the pull motion, the actuator means can exert a push motion requiring the actuator to be placed to the opposite side of the loading apparatus. The lift platform can alternatively be moved by mounting an actuator means of rotational motion onto any of the upper pivotal joints. Applicable variants for this purpose are, for instance, a motor-driven reduction gear as well as different kinds of hydraulic motors. The number of arms and their placement may differ from those of the four arms used ln the illustrating embodiment. The arms can be placed entirely below or above the platform. Naturally, this requires modifications in the platform construction. There may be a greater number of arms, while the placement of the arms under the table allows the use of two arms, or even a single arm of stiff construction.
The apparatus in accordance with the invention is particularly applicable to the handling of cylindrical objects such as paper rolls, while its operating principle can be applied to the construction of loading and unloading apparatuses suitable for objects of differing shapes and materials.
Carriage conveyors are used in mills and production plants, particularly for moving solid ob;ects. The carriage conveyor line is used for transferring materials such as paper rolls, packaging cartons and ore. The transfer carriage is movable in the factory along a dedicated track. The track comprises a chain sliding in a guide rail that pulls carriages attached at equal spacings to the chain. The carriages are thereby moved on rails mounted to the conveyor track. Different constructions of the conveyor carriage and track are also feasible. The structure of the track is dependent on the material being transferred and the desired track layout in the factory premises.
An advantage of the carriage conveyor over other types of con-veyors is that it is suitable for transferring material over greater lengths. Further, there is no need for shifting material from one conveyor to another in corners or in rising or falling slopes. The object placed in the conveyor carriage remains transversally stationary in relation to the track until trans-ferred away from the track.
The carriage conveyor is aptly suitable for the transfer of paper rolls in paper mills. The conveyor of paper rolls can be an intermittently operating conveyor, whereby the conveyor must be stopped when material is desired to be loaded on the conveyor at any station; or alternatively, a continuously operating conveyor allowing the material to be loaded onto the moving conveyor.
The intermittently operating conveyor is most appropriately used in locations having only a small number of loading and unloading stations and in which the required transport capacity is small and correspondingly the necessary transfer distances are relatively short. Stopping the conveyor for loading and `~' unloading decreases transport capacity and increases required transfer time. The lntermlttently operatlng conveyor can be stopped at regular intervals, whereby the loading of transferred material takes places at constant intervals during the stops of the conveyor. Hereln the material to be loaded must be at the loading station ready waiting for the stopping of the conveyor.
The conveyor can also be stopped at the reception of a stop command from the loadlng station. In this application the stop tlme of the conveyor remains slightly smaller than that required for a conveyor stopping at regular intervals, especially in the case where there is only a small number of loading stations.
In the continuously operating conveyor the material to be transferred -is loaded onto the conveyor while in motion. Sloping ramps or different kinds of hoisting equipment can be used for transferring the ob;ects on the conveyor. Ramps are advantageous-ly used at the loading stations when handling cylindrical objects such as paper rolls. When the roll is desired to be transferred onto the conveyor, the roll is pushed down a ramp onto the conveyor for transfer and then taken therefrom with the help of a receiver apparatus. The roll is rapidly accelerated to the conveyor speed by the effect of the frictional force exerted on the roll by the conveyor. When the roll is desired to be trans-ferred off the conveyor, it is pushed with a pusher from the conveyor track onto a ramp. The roll can also be lifted onto the conveyor track and back with the help of different kinds of hoisting equipment. When using hoisting equipment, the roll is kept stationary in relation to the transfer direction of the conveyor until the roll is lowered onto the conveyor, whereby the roll is accelerated to the speed of the conveyor by friction-al forces.
Although the speed of carrlages and track motion in carriage conveyors generally is relatively low, a start jolt will be exerted on the object to be transferred onto the conveyor that may cause damage to the ob;ect. Equally, frictional slippage at the encountering point of the roll with the recelver or pusher equipment can cause damage to the roll. To reduce damages to the rolls, pushers and receivers have been developed capable of complying with the roll motion when the roll is being transferred from the stationary support onto the conveyor track, and cor-respondingly, when the roll is being transferred back from thetrack onto a support base. This kind of an implementation avoids damaging the roll at the encountering point of the roll with the pusher or receiver equipment. The implementation reduces roll damages, but since slippage between roll and the track as well as between the roll and the unloading ramp still occurs, damages cannot be totally avoided. Consequently, continuously operating carriage conveyors have not been applicable in the handling of delicate or mechanically fragile grades of paper.
Since the equalization of speed difference between the roll and the track occurs under the influence of slippage and fric-tional forces, the equalization does not take place in a consis-tent manner, whereby the roll position on the track and in the carriage varies in a random manner and is dependent on the roll size. Variations in the transport path and position of the roll causes disturbance at loading stations and difficulties in the synchronization and control of the conveyor system.
The present invention aims to achieve such a loading and unload-ing apparatus for a carriage conveyor that avoids slippage of and damage to the ob;ect to be loaded or unloaded.
The invention is based on accelerating the object to be trans-ferred onto the carriage conveyor to an equal speed with the conveyor prior to the lowering of the object onto the conveyor.
More specifically, the apparatus in accordance with the invention is characterized by what is stated in the characterizing part of claim 1.
The invention provides significant benefits.
Slippage does not occur during loading and unloading of rolls allowing carriage conveyors to be used for handling and trans-ferring also mechanically fragile paper grades. Losses incurred by scratching are avoided, because frictional slippage does not occur. Improved easiness of synchronization of the loading and unloading stations with the track is also achieved over earlier designs. The advantage of the apparatus in accordance with the invention is that the reception of rolls at a station and the delivery of rolls from a station as well as the loading of rolls onto the carriage and the unloading of rolls from the carriage are entirely independent events, which can be controlled to take place in a consistent manner irrespective of the roll's dimensions. In apparatuses of earlier design the combined roll delivery/fetching was a single phase taking place during carriage loading/unloading, and since the equalization of speed difference between the roll and the track was based on frictional forces and slippage, the equalization of speed difference was partially random by its nature and also partly dependent on the roll's dimensions. This has been contributing to variations in the transfer path of the roll and disturbance in the operation of the system. The apparatus in accordance with the invention helps maintain the consistency of the roll transfer path, whereby the operational reliability of the system is improved.
The invention is next examined with the help of the attached drawings.
Figure 1 is a front view of an apparatus in accordance with the invention.
Figure 2 is a side view of the apparatus shown in Fig. 1.
Fig. 1 in the center illustrates a track 1 of the carriage conveyor with a carriage 2 running along the track 1 through the center of the apparatus. The loading apparatus has its frame 3 constructed so as to have its side parts located at opposite sides of the track 1 and joined together by beams positioned under the track 1. The frame 3 has a lift platform~
4 pivotally attached to it by four arms. The lift platform 4 comprises two parts placed at opposite sides of the track and joined by beams placed under the track 1. Arms 6 and 8 are attached at their lower ends by pivotal joints 11 and 15 to the lift platform 4 and at their upper ends by pivotal joints 10 and 14 to the frame 3.
Illustrated in Fig. 1 is a loading ramp 5 to the left of the loading apparatus and a receiver 18 to the right. The receiver is shown with dashed lines in its outermost and home positions.
The loading apparatus is suitable for rolls of different sizes.
20036~s Illustrated in the figure is a large roll 19 and small roll 20.
soth rolls can be received with the receiver 18 and lowered onto a carriage 2 without the need for any separate adjustments.
Rolls 19, 20 are always aligned in a consistent manner onto the carriage 2 at its center line.
Fig. 2 shows the apparatus illustrated in Fig. 1 in a side view. In the figure the transfer direction of the carriage 2 of the carriage conveyor is according to the arrow from the right to the left. The loading apparatus is shown in its lower position, while its upper position is shown with dashed lines 17. When the roll 19 to be loaded onto the carriage 2 enters the ramp 5, the lift platform 4 is pulled by a hydraulic cylinder 16 to the opposite direction from the transfer direction of the carriage 2. Since the arms 6 and 7 are mounted to the fixed frame 3 by the pivotal joints 10 and 12 at their upper ends and by the pivotal joints 11 and 13 to the lift platform 4, the arms 6 and 7 are rotated about the upper pivotal joints 10 and 12. The lift platform 4 and the apparatus frame are correspond-ingly joined on the other side of the track by arms and pivotal joints. The lift platform 4 is capable of moving in the opposite direction to the transfer direction of the carriage 2 as well as upward. The arms 6 and 7 are pivotally rotatable about the upper pivotal joints 10 and 12, whereby the lower pivotal joints 11 and 13 are transferred upward and opposite to the transfer direction of the carriage 2 along the circumference of a circle whose radius is equal to distance of the upper pivotal joints 10 and 12 from the lower pivotal joints 11 and 13. The distance from the pivotal joints 10 and 12 to the pivotal joints 11 and 13 as well as the travel of the hydraulic cylinder 16 are determined so as to make the vertical shift h of the lower pivotal joints 11 and 13 to be equal to height difference between the loading level of the carriage 2 and the level of the ramp 5.
When the lift platform 4 has reached its upper position shown in dashed lines 17, the roll 19 is pushed along the ramp 5 onto the lift platform 4. The roll 19 is received by the receiver 18, which slows down the speed of the roll 19 and stops the roll 19 onto the lift platform 4. The roll 19 is then transferred from the lift platform 4 to the carriage 2 in the following manner: When the carriage 2 is at a correct position between 200360S ~
the side parts of the lift platform 4, the lift platform 4 is shifted by the hydraulic cylinder 16 in the transfer direction of the carriage 2. Supported by the arms 6 and 7 and rotating about the upper pivotal joints 10 and 12, the lift platform 4 is shifted in the transfer direction of the carriage 2 and downward. The lift platform 4 and the roll 19 resting on it gain a velocity corresponding to the transfer speed and direction of the carriage 2, and when the arms 6 and 7 have reached an almost vertical position, the speeds of the carriage 2, the roll 19 and the lift platform 4 will be equal. At this instant the roll 19 makes contact with the loading base of the carriage 2. The lift platform 4 attains a slightly lower position allowing the roll 19 to remain in the carriage 2. The stopping of the lift platform motion is assured with a back stop 9.
The apparatus in accordance with the invention can also be used as an unloading apparatus. In this implementation the apparatus is placed relative to the track 1 so that the lift platform is movable by the hydraulic cylinder so that the motion direction of the lift platform 4 and the cylinder 16 is the same as the transfer direction of the carriages 2. When the transfer direction of the carriage 2 is as shown by the arrow in Fig. 2, the apparatus must be oriented to the opposite direction from that shown in the figure, that is, the apparatus must have the end containing the cylinder 16 to the left.
The operation of the loading apparatus and the carriage conveyor are synchronized using conventional motion detectors.
The construction of the apparatus in accordance with the inven-tion can be varied from the embodim~nt described above. The hydraulic cylinder used in the described implementation can be replaced by any actuator means capable of exerting a linear motion such as a recirculating ball nut and screw combination.
Instead of the pull motion, the actuator means can exert a push motion requiring the actuator to be placed to the opposite side of the loading apparatus. The lift platform can alternatively be moved by mounting an actuator means of rotational motion onto any of the upper pivotal joints. Applicable variants for this purpose are, for instance, a motor-driven reduction gear as well as different kinds of hydraulic motors. The number of arms and their placement may differ from those of the four arms used ln the illustrating embodiment. The arms can be placed entirely below or above the platform. Naturally, this requires modifications in the platform construction. There may be a greater number of arms, while the placement of the arms under the table allows the use of two arms, or even a single arm of stiff construction.
The apparatus in accordance with the invention is particularly applicable to the handling of cylindrical objects such as paper rolls, while its operating principle can be applied to the construction of loading and unloading apparatuses suitable for objects of differing shapes and materials.
Claims (5)
1. An apparatus for loading and unloading a carriage conveyor, which apparatus comprises a fixed frame (3) and a lift platform (4) attached to the frame (3), c h a r a c t e r i z e d by - at least one arm (6, 7, 8), which is attached at its one end by a first set of pivotal joints (10, 12, 14) to the fixed frame (3) so that the arms (6, 7, 8) are rotatable about the pivotal joints (10, 12, 14), while the locations of the joints (10, 12, 14) remain station-ary relative to the fixed frame (3), - a second set of pivotal joints (11, 13, 15) at the other end of each arm (6, 7, 8), which joints attach the other end of each of the arms (6, 7, 8) to the lift platform (4) so that the arms (6, 7, 8) are rotatab-le about the pivotal joint (11, 13, 15), and - an actuator means (16) capable of exerting a transfer motion to the lift platform (4), or alternatively, a rotational motion to any of the arms (6, 7, 8), whereby the arms (6, 7, 8) are rotated about the first set of pivotal joints (10, 12, 14), while the second set of pivotal joints (11, 13, 15) at the other end of each of the arms (6, 7, 8) are transferred along the circum-ference of a circle, whose radius is determined by the mutual distance of the pivotal joints (10, 11, 12, 13, 14, 15) thus causing corresponding shifts of the lift platform (4) in the horizontal and vertical directions.
2. An apparatus in accordance with claim 1, c h a r a c-t e r i z e d in that the frame (3) and the lift platform (4) are attached by at least two arms (6, 7, 8), which are located at the opposite sides of the apparatus relative to its center line and between the lift platform (4) and the frame (3).
3. An apparatus in accordance with claim 1, c h a r a c-t e r i z e d in that the actuator means (16) effecting the shifting of the platform position is a hydraulic cylinder attached to the lift platform (4) and capable of forcing the lift platform (4) to be shifted in the horizontal direction.
4. An apparatus in accordance with claim 1, c h a r a c-t e r i z e d in that the actuator means (16) effecting a rotational motion is an electric motor with a reduction gear attached to the any of the pivotal joints (10, 11, 12, 13, 14, 15) so as to make it possible to rotate an arm (6, 7, 8) about its pivotal joint.
5. An apparatus in accordance with claim 1, c h a r a c-t e r i z e d in that the actuator means (16) effecting a rotational motion is a hydraulic motor attached to the any of the pivotal joints (10, 11, 12, 13, 14, 15) so as to make it possible to rotate an arm (6, 7, 8) about its pivotal joint.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI885643A FI82430C (en) | 1988-12-02 | 1988-12-02 | Device for loading objects on a carriage conveyor and for unloading them therefrom |
| FI885643 | 1988-12-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2003605A1 CA2003605A1 (en) | 1990-06-02 |
| CA2003605C true CA2003605C (en) | 1996-09-03 |
Family
ID=8527513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2003605 Expired - Lifetime CA2003605C (en) | 1988-12-02 | 1989-11-22 | Apparatus for loading objects on a carriage conveyor and for unloading them therefrom |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA2003605C (en) |
| DE (1) | DE3939971C2 (en) |
| FI (1) | FI82430C (en) |
| FR (1) | FR2639925A1 (en) |
| SE (1) | SE501646C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI116720B (en) | 2004-04-14 | 2006-02-15 | Metso Paper Inc | Method and apparatus for moving rollers during packing |
| FI117937B (en) | 2005-10-14 | 2007-04-30 | Metso Paper Inc | Method and apparatus for moving rollers during packing |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2115762A (en) * | 1936-10-23 | 1938-05-03 | Alvey Conveyor Mfg Co | Conveyer |
| FR1204537A (en) * | 1958-04-16 | 1960-01-26 | Renault | Device for picking up or unloading parts on a continuous movement handling chain |
| AT290392B (en) * | 1968-10-22 | 1971-05-25 | Voest Ag | Conveyor device for transporting sheet metal coils from a feed point to a processing plant or the like. |
| AT291112B (en) * | 1968-12-03 | 1971-07-12 | Friesacher Maschf | Feeding device for conveyor and sorting systems, in particular for round wood |
| CH520051A (en) * | 1971-02-26 | 1972-03-15 | Intercont Ferromatic Trust Reg | Conveying method for elongated, columnar objects |
| US4362456A (en) * | 1978-11-06 | 1982-12-07 | Barry Leonard D | Rotary loader and storage system |
| US4370086A (en) * | 1979-08-15 | 1983-01-25 | Barry Leonard D | Rotary loader and side coupling system |
| US4370085A (en) * | 1979-08-15 | 1983-01-25 | Barry Leonard D | Rotary parallel arm loader and system |
| JPS56103019A (en) * | 1980-01-21 | 1981-08-17 | Ishikawajima Harima Heavy Ind Co Ltd | Synchronizing method for moving object |
| DE3101659A1 (en) * | 1981-01-20 | 1982-08-26 | Friedrich Kessler, Werkzeug- und Maschinenbau, 8032 Gräfelfing | Feeding and unloading apparatus and work carriers at assembly and machining stations |
| US4519737A (en) * | 1983-02-07 | 1985-05-28 | Barry Leonard D | Rotary loader and side-coupling transfer system |
-
1988
- 1988-12-02 FI FI885643A patent/FI82430C/en not_active IP Right Cessation
-
1989
- 1989-11-22 CA CA 2003605 patent/CA2003605C/en not_active Expired - Lifetime
- 1989-11-24 SE SE8903970A patent/SE501646C2/en unknown
- 1989-11-29 FR FR8915699A patent/FR2639925A1/en active Granted
- 1989-12-02 DE DE19893939971 patent/DE3939971C2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| SE501646C2 (en) | 1995-04-03 |
| FI82430C (en) | 1991-03-11 |
| CA2003605A1 (en) | 1990-06-02 |
| SE8903970D0 (en) | 1989-11-24 |
| DE3939971C2 (en) | 1996-09-05 |
| FI885643A (en) | 1990-06-03 |
| FI82430B (en) | 1990-11-30 |
| FR2639925B1 (en) | 1995-04-21 |
| SE8903970L (en) | 1990-06-03 |
| FI885643A0 (en) | 1988-12-02 |
| DE3939971A1 (en) | 1990-06-07 |
| FR2639925A1 (en) | 1990-06-08 |
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