The present invention relates to an inter-box connector (IBC) storage and handling (installation and removal) system for a freight container, more specifically, for the storage, installation and removal of IBCs from the respective corner fittings of freight containers. This invention also relates to an IBC supplying and receiving magazine that is used in conjunction with such an IBC storage and handling (installation and removal) system.
About 80% of world trade is carried out by shipping, and a major part of it via freight containers. Each year, about 150 million twenty-foot equivalent unit (or TEUs) freight containers are moved through the seaports of the world. This highlights the necessity for a typical container port to function in an efficient manner. One aspect of achieving said efficiency results from the use of container quay cranes that presently, are capable of loading and unloading a plurality of freight containers in a single cycle.
As container ports become more competitive with respect to each other, said container ports are forced to improve their efficiency in container handling (i.e. the loading and unloading of freight containers to and from a container ship respectively), for example. Accordingly, the implementation of automation in traditionally labour-intensive areas of work, such as the installation and removal of IBCs, for example is one practical way of improving the efficiency of a container port. In tandem with improving the efficiency of the container port, there is also an increasing concern for improving the safety standards in a workplace. This is especially so at a container port where large, heavy lifting equipment is employed and invariably involves the movement of heavy loads over port workers.
With regard to the above-mentioned efforts to improve the efficiency of the container port, U.S. Pat. No. 6,554,557 describes a semi-automatic system for installing and removing inter-box connectors (IBCs). The system described therein includes a pair of conveyors arranged along the longitudinal side of the base of a freight container. The freight container itself sits on a support structure. Each conveyor has carriers formed along the conveyor and each carrier is used for transporting and positioning individual IBCs proximate to the bottom corner fittings of a container. Once the IBCs are in alignment with the corner fitting of the container, the individual IBCs are manually placed into said corner fittings by means of a jacking device. The jacking device allows a user, through the activation of a foot-pedal to push the IBC upward and into said corner fitting. Conversely, to remove the IBC, the foot-pedal is activated so that the jacking post disengages the IBC from the associated corner fitting and is lowered, manually, back into the carrier.
In spite of the above development, there is still a need to increase the efficiency of IBC operations. Specifically, there exists a need for an IBC installation and removal system that is cost effective, efficient and portable. In this regard, an IBC installation and removal system, as defined in the appended claims overcomes the above-mentioned difficulties, in particular those of improving the efficiency of a container port and maintaining suitable safety standards for the workers thereof.
Accordingly, such an inter-box connector (IBC) storage and handling (installation and removal) system for a freight container having four bottom corner fittings, with each corner fitting being capable of receiving an IBC, includes an IBC handling device. The IBC handling device includes at least one elongated magazine. The magazine is fabricated having an opening at least one end thereof and is adapted for receiving and supplying IBCs through said opening. The IBC handling device also includes a transport mechanism adapted to move the magazine into IBC receiving and supplying positions. In each of said positions the opening of the magazine is proximate to one of the respective corner fittings and to at least one IBC installation and removal mechanism. The IBC installation and removal mechanism is arranged and adapted to receive IBCs supplied from the magazine, through said opening, and to install the same into the respective corner fitting in each of said positions. Conversely, during the removal of IBCs, the IBC installation and removal mechanism removes said IBCs from the respective corner fittings and supplies the same into the magazine through said opening in each of said positions. As the system of the present invention automates the installation and removal of IBCs, which is normally carried out by stevedores (manual labour), it can also be referred to as an auto-stevedore system.
In one embodiment, the system may further comprise a support structure for the freight container. The support structure, having a support surface for supporting the freight container, may be dimensioned such that critical portions of the container rests on said supporting surface. Alternatively, the entire container may rest on said support surface of the support structure. The support structure aids in the installation or removal of IBCs into and from said bottom corner fittings respectively in that it provides a means of securing the freight container in a fixed position.
In another embodiment, the above-mentioned IBC handling device may be coupled underneath the support structure. Specifically, the IBC handling device may be situated underneath the support surface of the support structure. In this regard, it follows that the magazines and any corresponding mechanisms, such as the IBC installation and removal mechanisms, for example, may also be located beneath the support surface in the embodiment that includes a support structure.
In a further embodiment, the magazine or the plurality thereof may be horizontally orientated with respect to the support surface of the support structure. In the embodiments where the magazines are horizontally placed, the magazines have an opening at least one end thereof. Alternatively, in another embodiment of the arrangement of magazines, the magazines may be arranged to be vertically orientated with respect to the support surface of the support structure (i.e. perpendicular to the support surface). In this alternative orientation of the magazine, said magazine may also have an opening at least one end thereof.
In an exemplary embodiment of the present invention, the transport mechanism is adapted to move the magazine into four receiving and supplying positions. Of note, the movement of the magazines into the receiving and supplying positions is done in accordance with the orientation and number of openings present in the magazines used. In this regard, as an illustrative example, in the above-mentioned embodiment, wherein the magazine is vertically orientated with at least one open end, the same magazine supplies IBCs to all four corner fittings if the transport mechanism is capable of moving said magazine into four different positions. Accordingly, in another illustrative example, the embodiment wherein the magazine is horizontally orientated with respect to the supporting surface of the support structure, and has two openings at either end thereof, the magazine may supply IBCs to all four corner castings if the transport mechanism is capable of moving the magazine into two different receiving and supplying positions.
In a further embodiment of the horizontally orientated magazines, said horizontally orientated magazine may be formed of two portions. Each portion may have two openings and may be adapted for receiving and supplying IBCs from and to the respective corner fittings of the freight container. In the embodiments where the magazine is orientated horizontally, said magazines may be arranged parallel to the length or width of the base of the freight container.
The transport mechanism, in any of the above-mentioned embodiments is adapted to move the magazine into any of the said receiving and supplying positions by rotational or cyclic motion. In embodiments where the magazine moves via cyclic motion, the transport mechanism may be a cyclic conveyor mechanism capable of moving a plurality of magazines into said receiving and supplying positions by cyclic motion.
In another embodiment, the transport mechanism may be adapted to move the at least one IBC installation and removal mechanism between any of the respective corner fittings of the freight container. In this embodiment, the magazines proximate to the corner fittings may remain stationary. Accordingly, the installation and removal mechanism may be adapted to locate the IBC dispensed from the magazine, and to fit said IBC into the relevant corner fitting. Consequently, the installation and removal mechanism may be expected to perform the same locate and fit function at each of the corner fittings.
In an example of a cyclic conveyor mechanism, a plurality of magazine may be on a track wherein said track is arranged to pass proximate to each corner fitting. Accordingly, the plurality of magazines moves along the track between each IBC receiving and supplying position. In all the embodiments described herein, the IBC handling device may include a plurality of magazines.
In another embodiment, the IBC handling device may include at least two transport mechanisms being arranged in a stack. In this respect, the space beneath any supporting surface present may be adapted to allow for at least two transport mechanisms to be stacked, one atop the other.
The IBC installation and removal mechanism, in a first embodiment, may be in the form of a lever actuator adapted to grip the dispensed IBC and manipulate it sufficiently to fit said IBC into a corner fitting (cf.
In a second embodiment, the IBC installation and removal mechanism may be an (clamping) arm adapted to clasp the IBC and to manipulate it in order to fit said IBC into the corner casting (cf.
In a third embodiment of the installation and removal mechanism, the installation and removal mechanism may simply be a lever adapted to engage a catch on the IBC. Once the catch is engaged, the IBC may be simply pushed into or removed from the respective corner casting (cf.
In a fourth embodiment of the IBC installation and removal mechanism, the mechanism may be placed within cams or slots such that when actuated, a predefined motion is established (cf.
In a fifth embodiment of the installation and removal mechanism, the magazine itself may be adapted to provide a means of installing and removing the IBC directly to the corner fitting. In this respect, it may be taken that the installation and removal mechanism is integrated along with the magazine and functions in conjunction with the magazine transport mechanism (cf.
All embodiments described herein may further include an alignment mechanism (fine alignment mechanism) coupled to the IBC installation and removal mechanism. The IBC installation and removal mechanism alignment mechanism includes, or is in the form of a vertically moveable arm. Such an arm may move vertically as it slides along upright guiding posts. These upright guiding posts may also be coupled to a horizontally moveable frame. At least two of the four edges of the horizontally moveable frame may be coupled to the support structure beneath the support surface via elastic means. The horizontally moveable frame may also have up to four IBC installation and removal mechanisms mounted on said vertically moveable arms such that said IBC installation and removal mechanisms are in alignment with the respective corner fittings. The vertically moveable arms that provide an alignment between the installation and removal mechanism and the respective corner fittings are also located at least two of the four edges of the horizontally moveable frame to effectively engage the freight container.
The vertically moveable arm is translatable between an initial position and a final position. The initial position is such that it allows each of the IBC installation and removal mechanisms attached thereto, to receive and supply IBCs from and to the magazine. The final position allows each of the IBC installation and removal mechanisms to install and remove IBCs into and from the corner fittings respectively. On each of the respective sides of the vertically moveable arm is at least one guiding element that extends vertically upwards. The guiding element is adapted to engage the container by first abutting, and then sliding along the respective walls of the container during motion between said initial and final positions.
In an exemplary embodiment of the invention, the alignment mechanism consisting of the vertically moveable arm has four pairs of guiding elements situated adjacent to the IBC installation and removal mechanism. Each pair of guiding elements extends vertically upwards from each end of the vertically moveable arm. Said pairs of guiding elements are adapted to engage the container by first abutting, and then sliding on the respective walls of the container during motion between said initial and final position.
In any of the embodiments including the above-described alignment mechanism, the elastic means used to couple said frame to the support structure includes, but is not limited to, a compression/torsion spring, a cantilever or a monolithic flexural spring. Any one or a combination thereof may be used to suitably bias the frame to remain centralized with respect to the support structure.
It should be noted that the transfer mechanism that operationally links the respective corner fittings to the receiving/supplying and storing magazines, in one instance, is embodied as described above, through the vertical movement of the IBC installation and removal mechanism that is mounted on the guiding elements of the fine alignment mechanism. However, it is by no means limited to such predefined movements. In an alternative exemplary embodiment, during loading or unloading operations, the installation and removal mechanism may be adapted to pick a particular magazine from an array of magazines from which it may supply/receive and store IBCs. Accordingly, it follows that a sufficiently flexible installation and removal mechanism is capable of picking a magazine from an array of magazines, to deposit or retrieve IBCs.
In the embodiments of the invention having a plurality (two or more) of magazines, at least one of the magazines may be adapted to store a first variant of IBC and at least one other magazine, within said plurality, may be adapted to store a second variant of IBC. Accordingly, more than two variants of IBCs may also be stored in various magazines according to operating requirements. Examples of IBCs that may be used include, but are not limited to, a twistlock T-1 IBC, a twistlock T-2.3 IBC and a fully automatic T-4 IBC.
The support surface, as mentioned above, is for supporting the freight container during IBC installation and removal operations. In this regard, it may not be necessary for the entire bottom surface of the container to sit on said surface. It may be possible to support the entire freight container provided sufficient portions of the said container are supported during IBC operations.
Alternatively, the entire freight container may be supported by said support structure. Accordingly, the support structure has to be dimensioned to correspond to the bottom dimensions of the freight container (either a 20 foot or a 40 foot container). In the embodiment wherein the entire container is supported by said support structure, the support structure includes an incline plane along at least two orthogonal dimensions of the support surface.
In an exemplary embodiment, the support surface, as mentioned above, may include the incline plane along three or four orthogonal dimensions corresponding to the bottom of the freight container. For the embodiment having two twenty-foot IBC installation and removal devices in tandem (to accommodate a forty-foot container) there may be included a central inclined plane that is spring-loaded and mounted onto the support frame. In this regard, the spring-loaded inclined plane may be compressed when abutted by a forty-foot container placed onto said tandem arrangement.
The IBC handling system of the invention may further include an IBC transfer means. Said IBC transfer means may have a piston and a ram. Both the piston and the ram are adapted to engage the magazine such that said piston and ram are slidable along the longitudinal axis of the magazine either towards or away from the corner fitting when said magazine is in the receiving and supplying position.
In an alternative embodiment, the IBC may be dispensed from the magazine by means of a vibration motor (vibro-motor). In the embodiment having a vibro-motor the magazine, aided by gravity, constantly vibrates such that the IBCs therein are also constantly being moved to the dispensing opening of the said magazine. Conversely, during IBC removal operations, the magazine tilt may be redirected such that gravitational tendencies are rearranged or reversed such that the IBCs are moved into the magazine with the help of said vibration. The embodiment having a vibro-motor may necessitate having a magazine that is inclined at an angle in order to facilitate the movement of IBCs into or out of the magazine.
The piston acts to dispense (supply) the IBC during IBC installation operations. It does so by pushing out each individual IBC for the installation and removal mechanism to grasp. Subsequently, during removal operations, the ram acts to facilitate the retrieval of IBCs. The IBC installation and removal mechanism places the IBC in an intermediate position after disengaging said IBC from the corner fitting. The ram then pushes the IBC back into the magazine for storage till further use.
The moveable components of the IBC handling device, such as the IBC installation and removal mechanism or the transport mechanism, for example, may be actuated by hydraulic means, pneumatic means, electromechanical means or any combination of the aforementioned means. In utilizing pneumatic or hydraulic means, suitable pressure gauges may also be included to ensure the safety and efficiency of the (entire) operating system.
In another embodiment, the handling of an IBC may be (entirely or at least partially) by magnetic means. In this regard, magnetic means typically refers to an electromagnetic source being used to manipulate the orientation of the IBC prior to installation into the respective corner fittings, for example. The magnetic means may be used in conjunction with the IBC installation and removal mechanism. In this regard, the portion of the mechanism that contacts the IBC may be magnetized such that said mechanism merely contacts the IBC, lifts it into position and installs the IBC with minimum friction and manipulation. Conversely, the same may apply during the IBC removal process wherein the mechanism retrieves the IBC from the respective corner fittings through magnetic contact.
Further, the magnetic handling means may be employed to draw an IBC from or deposit an IBC into the magazine.
Alternatively, the magnetic handling means may be used simply for alignment purposes between the IBC and the corner fitting of the freight container. In another exemplary embodiment, the magnetic handling means may also be used to directly translate the IBC from the magazine into the corner fitting.
The system for the installation and removal of inter-box connectors (IBCs) for a freight container can be adapted to accommodate any kind of commercially available freight container which utilizes said IBCs for transportation purposes. In this regard, a forty-foot long freight container or two twenty-foot containers may be accommodated by the IBC handling system, for example. For handling either a forty-foot container or a twenty-foot container, two IBC installation and removal systems can be arranged in a collinear relationship and in abutment to each other. Since each individual system is, by default capable of handling a twenty-foot container the above arrangement provides for the same to be applied to the forty-foot range of containers as well. In this regard, to aid in the abutment of two IBC systems, a locking mechanism may be included among the abutment edge or surface to provide for a secure joining of the two sections.
Alternatively, the IBC installation and removal systems may be placed in tandem or in a line abreast arrangement. This arrangement is in line with the new generation of quay cranes that are capable of lifting a plurality (two or more) of freight container in a single lift. Accordingly, more than one container may be deposited for IBC installation and removal operations. In this respect, the modular system described herein allows for a flexible layout to accommodate both twenty foot and forty-foot freight containers.
The entire system for the removal and installation of IBCs, and their respective embodiments, may be used within the framework of a larger port container management system. In this system, the quay crane and the inter-box connector (IBC) installation and removal system for the freight container are working together and since the need for manual labour is reduced by the IBC system, said IBC system forms a crucial part of the port operations relating to the installation and removal of IBCs.
The IBC handling device as used in the overall container management system may include at least one elongated magazine, wherein the magazine has an opening at, at least one end thereof and is adapted for receiving and supplying IBCs through said opening. In addition, the IBC handling device may also include a transport mechanism adapted to move the magazine into IBC receiving and supplying positions. At each of said positions, the opening of the magazine is proximate to one of the respective corner fittings. Such an arrangement, as described above, allows at least one IBC installation and removal mechanism that is arranged and adapted to receive IBCs supplied from the magazine through said opening, to install the same into the respective corner fitting in each of said positions. Accordingly, the said IBC installation and removal mechanism may also remove the IBCs from the respective corner fittings and supply the same back into the magazine through said opening in each of said positions.
In all the IBC handling system as described herein, an IBC magazine is utilized. The IBC magazine utilized includes an elongated hollow shaft having an opening at least one end thereof. The hollow shaft is adapted for receiving and supplying IBCs through said opening. In this regard, the interior of the shaft may have notches or sliding rails and slots, for example, to accommodate different variants of IBCs.
The IBCs may move within the magazine in a slidable manner. The mechanism dispensing the IBCs, for example may be the afore mentioned ram and piston mechanical mechanism, a spring-loaded mechanism or a chain link adapted to pull out the respective IBCs from the magazine, for example.
In a further embodiment, the IBC magazine is adapted to move between IBC receiving and supplying positions by a transport mechanism. In each of the receiving and supplying positions, the opening of the magazine is proximate to one of the respective corner fittings in order to facilitate the movement of IBCs from the magazine to the IBC installation and removal mechanism or vice versa. In this regard, it may be considered that the IBC magazine is adapted to supply and receive IBCs during the installation and removal of IBCs from the respective corner fittings.
In all the above-mentioned embodiments, the magazine is translatable between supplying and receiving positions with the IBC installation and removal mechanisms being located at said supplying and receiving positions. However, it may also be the case that magazines may remain fixed at the supplying and receiving positions. In such an exemplary embodiment, the installation and removal mechanism may be moved instead to the respective receiving and supplying positions to carry out the installation and removal of the IBCs as required. Accordingly, the above-mentioned kinematic reversal embodiment still retains the principle invention in the other exemplary embodiments described herein.
To aid in the further understanding of the present invention, said invention will be further illustrated by way of non-limiting embodiments, along with an accompanying detailed description of said embodiments.
The spreader 30 is extendable in its length to correspond with the length of a container 100 to be picked up. In unloading operations, the container 100 is hoisted from the ship by the quay crane 140, via the spreader 30. The quay crane 140 then moves the container being lifted to the IBC operational area 160. Presently, the container is then lowered to the shoulder height of a stevedore so that the stevedore can remove the IBCs located inside the bottom corner fittings of the container 100. The container is subsequently hoisted onto a trailer 120 for transfer away from the quayside to a storage yard, for example.
For loading operations, a container 100 is brought on a trailer 120 and said trailer 120 parks beneath the quay crane 140 in the IBC operational area 160. The spreader 30 lifts the crane, again to man height in order for the port workers to install IBCs to the four respective corner fittings of the freight container 100. Subsequently, the spreader 30 lifts the container 100 onto the deck (or into the hold) of the container ship 22 where said containers are stacked to a regulation height.
The fully automatic locking mechanism of the T-4 200 is only appreciated during the unloading process. In conventional or semi-automatic locking mechanisms of IBCs, further human intervention is required to release the locks between stacked containers prior to said containers being lifted by the crane and subsequently having the IBCs manually removed from said containers. In the case of the T-4 200, the crane operator merely has to shift the container to be unloaded by a horizontal distance of 13 mm. The horizontal shift allows the T-4 200 to disengage from the container beneath for unloading onto the dock for the stevedore to manually remove the IBCs from the respective corner fittings of the container.
240 shows an IBC that employs the same lever mechanism as the T4 of
Beneath the supporting frame 310, a plurality of magazines 360 are arranged such that they are proximate to the corner fittings of the freight container 2 when said container 2 is placed on the support frame 310. The magazines are engaged by a drive mechanism (not shown) to be moveable between IBC receiving or supplying positions. An IBC receiving or supplying position is one where an IBC may be dispensed or received during the installation and removal processes respectively. Each of the plurality of magazines stores a plurality of IBCs.
Section 390 shows freight container 2 placed on top of the support frame 310. The container 2 is initially engaged by the guiding rails 311 that provide a course alignment to the container with respect to the entire IBC installation and removal system. Once placed firmly on the supporting frame 310, the fine alignment mechanism 320 engages the bottom corners of the container to align four IBC installation and removal mechanisms (not shown) to the corner fittings of the freight container. The engagement of the container via the fine alignment mechanism 320 occurs when the fine alignment mechanism 320 translates vertically upward. During said vertical translation the arms of the fine alignment mechanism abut the respective walls of the container. Specifically, as shown in the present illustration, the arms abut the portion of the walls that form the corner of the container.
The IBC installation and removal mechanisms (not shown in
The fine alignment mechanism 420 is shown to be in an engaged state with the respective corner fittings of the container. In this embodiment, the plurality of magazines is stored within an enclosure 405. The enclosure 405 includes four openings 406 on either latitudinal surface of the enclosure 405. The arrangement of each opening is such that they are in substantial alignment with the corner fittings.
The installation process in the embodiment of
Unlike
The guiding rails 925 are shown as not abutting the container but may do so when said container is being lowered to the supporting frame 910. Said guiding rails 925 are inclined inwards such that when the container is lowered, said container is pre-disposed towards sliding onto the support frame 910 once it contacts the guiding rails 925.
The plurality of magazines 915 is enclosed within an enclosure 930 as shown. The enclosure 930 has two pairs of openings 980 (top openings) and 981 (bottom openings) on opposite sides of the enclosure 930. The bottom set of openings is situated below those of where the magazines 916 and 917 are located. This is because in a further embodiment, the plurality of magazines 915 may be stacked above a second plurality (not shown) to provide the maximum available IBCs during installation and removal. The second plurality then dispenses or receives IBCs from the bottom set of openings 981 when the magazines are in the respective dispensing and receiving positions.
The embodiment of
In addition to the IBC installation and removal mechanism, the
During the IBC installation and IBC removal process, the IBC installation and removal device may be actuated by hydraulic means 1025. The hydraulic means 1025 is driven along a cam profile 1028 such that the resulting motion of the entire arm, during the installation process, provides for the fitting of the IBC into the corresponding corner fitting of the container.
During IBC retrieval operations, the lever actuator 1015 when actuated via the hydraulic means 1025, for example, removes the IBC from the respective corner fitting and the IBC removed thereby is deposited in alignment with the magazine opening (not shown), after vertically downward translation by the relevant mechanism. The ram 1020 then moves co-axially to the magazine or along the central axis of the magazine to push the retrieved IBC back into the magazine.
The entire IBC installation and removal device mechanism 1000 is situated on the alignment mechanism of
In
The embodiment of
The alignment mechanism 1100 also includes guiding arms 1110 located symmetrically around the vertically moveable portion of the mechanism 1100. The guiding arms 1110 perform the function of engaging the container when raised vertically upwards. The guiding arms engage the container by first abutting against the respective sidewalls of said container and then sliding against them. Should the container be not aligned directly above the alignment mechanism 1100, as the guiding arms 1010 engage the container, the elastically coupled frame (x-frame, I-frame or regular rectangular frame) translates, as mentioned above, within its own horizontal plane such that the frame (x-frame, I-frame or regular rectangular frame), and any fixtures mounted thereon, such as the IBC installation and removal mechanism, for example, are aligned to the respective corner fittings of the container.
Once aligned to the container, in the example of the embodiment having an IBC installation and removal mechanism as described in the embodiments of
The support platform 1750 is mechanically engaged, in a depressible manner, to the fine alignment and IBC installation and removal mechanisms via rack and pinion gears 1725 and 1730. The support platform 1750 is engaged to the fine alignment mechanism in a similar manner as well. When the container is placed on top support platform 1750, the weight of the container pushes the support platform 1750 downwards. Said downward movement of the support platform 1750 actuates the fine alignment mechanism to clasp the container through horizontal sliding movements of the arms 1705. The arms 1705 move in a slidable manner through the collar 1706 to clasp both the longitudinal and latitudinal dimensions of the container.
As the depressible support platform 1750 is also mechanically engaged to the IBC installation and removal mechanism, the IBC installation and removal mechanism is simultaneously translating upwards towards the corner fittings of the container. As the fine alignment mechanism secures itself to the container, the IBC installation and removal arm, having already received the IBC from the magazine 1780, is proximate to the respective corner fittings of the container.
The IBC installation and removal mechanism is similar to that as described in
Conversely, in the case of IBC removal operations, a container with IBCs installed is placed onto the support platform 1750 and the same sequence of movements occur with respect to the fine alignment and IBC installation and removal mechanisms. However, in this regard, the IBC installation and removal mechanism does not receive an IBC from the magazine 1780. Instead, as it engages the corner fitting, the IBC installation and removal device (not shown) removes the IBC and returns it to the receiving magazine 1780 subsequently.
The guiding arms 1805 are connected to the depressible platform 1850 via a rack and pinion gear mechanism. In this regard, as the platform 1850 moves downwards from the weight of the container, the pinion gears 1836 (coupled to the guiding arms) engaged to the rack gear 1835 rotate in a manner that causes the guiding arms 1805 to be moved in a slidable manner, via collars 1806, to engage the walls of the container. This movement occurs as the rack gear 1835 moves downwards along under the weight of the container.
The coupling of the depressible platform to the IBC handling mechanism (IBC installation and removal mechanism) is achieved by a rack and pinion gear arrangement similar to that as described above. In this regard, the downward movement of the rack gear 1835, as previously mentioned, also causes the upward movement of the handling mechanism 1870 and arms towards the corner fittings of the container. The upward movement of the handling mechanism 1870 results from the rotation of pinion gear 1830 in the anti-clockwise direction. It follows that the corresponding pinion gear 1831 rotates in the clockwise direction. The resulting motion directs the other set of rack gears 1825 and 1826 to move upwards thereby allowing the handling mechanism 1870 to fit or remove the IBC from the respective corner fittings.
However, it should be noted that each magazine 2650 is freely oscillating under the effect of gravity, as the circular bracket 2670 does not fix the orientation of the magazine. Instead, the magazine orientation is dependent upon the direction through which the weight of the magazine (loaded or unloaded) acts.
The magazine is designed such that the IBCs loaded therein are also orientated such that the weight of the IBCs acts in a vertically downward direction at all times. This is achieved by having groves and slots 2660 within the magazine 2650 that are adapted to hold the IBC in such an orientation that the above-mentioned orientation of the magazine 2650 is achieved. To ensure that the desired orientation is maintained, each magazine has the groves and slots 2660 such that the centre of gravity (CG) of each magazine 2650 is below the centre of rotation of the circular bracket 2670. The centre of gravity (CG) of the magazine 2650 when loaded with IBCs remains below the centre of rotation of the circular bracket 2670. In an exemplary embodiment, in order for each magazine 2650 to self-adjust via gravitational effects, each circular bracket 2670 may include an internal frictionless bearing, for example.
When each magazine enters the dispensing position, for example, a ram 2680 engages either one end of said magazine or the midpoint of said magazine. The ram 2680 then slides toward an opening located at an end of the elongated magazine in incremental steps. Each incremental step pushes an IBC out of the magazine and into the installation and removal mechanism ready to be inserted into a corner fitting of a container during IBC installation operations:
Alternative drive mechanisms may be in the form of a timing belt to guide the outer rail, as shown in
While a few embodiments of the IBC installation and removal apparatus have been described and illustrated, it is to be understood that many changes, modifications and variations may be made to the present invention without departing from the principle and scope of said invention.
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/SG2005/000279 | 8/16/2005 | WO | 00 | 7/30/2008 |