FREIGHT HOISTING ARRANGEMENT, ESPECIALLY FOR USE ON BOARD SHIPS

Abstract: A freight hoisting arrangement is designed for use on board a ship in connection with a side port opening. It comprises at least a hoist carriage (14, 15) which is moveable along a guide column (12, 13) in a hoist shaft (11) which connects the side port opening with different decks of the ship. The hoist carriage (14, 15) carries via a pair of support arms (20, 25) a loading platform (29) pivotably mounted relative to the hoist carriage for movement of the loading platform horizontally from a fore-and-aft position from a position within hoist shaft (11) of the ship via the side port opening to a fore-and-aft position in a position outside the side (10) of the ship. The loading platform (29) is moveable in a horizontal direction relative to the hoist carriage (14, 15) by means of a pressure medium cylinder (30). A first support arm (20) is pivotably mounted at a first end (19) about a first vertical axis (19a) on the hoist carriage (14, 15) and is pivotably mounted at a second end (21) about a second vertical axis (24a) at first end (24) of the second support arm (25). Second end (26) of the second support arm is pivotably mounted about a third vertical axis (28a) on the loading platform (29). A first positive guide means (32) connects first end (26) of the second support arm (25) to the hoist carriage (14, 15), while a second positive guide means (38) connects second end (21) of the first support arm (20) to the loading platform (29), for positively guiding the loading platform (29) in a fore-and-aft position in a rectilinear transverse movement between the position within the hoist shaft (11) and the position outside the side (10) of the ship.

Description: FREIGHT HOISTING .ARRANGEMENT, ESPECIALLY FOR USE ON BOARD SHIPS. The present invention relates to a hoisting arrangement, especially for use on board a ship in connection with a frei opening, especially a side port opening, comprising at least hoist carriage which is moveable along a guide column in a h shaft which connects the freight opening or the side port op to different decks of the ship, where the hoist carriage car via a pair of support arms a loading platform pivotably moun relative to the hoist carriage for movement of the loading p form horizontally from a fore-and-aft position from a positi within the hoist shaft of the ship via the freight opening o side port opening to a fore-and-aft position in a position o side the side of the ship, the loading platform being moveabl a horizontal direction relative to the hoist carriage by mea a power means, such as a pressure medium cylinder, which is p ferably jointed to the hoist carriage. The present invention is as mentioned especially designe for use on board ships, but will also be able to find applica for other purposes, for example in connection with freight openings on land vehicles or in connection with freight openi in structure on land, and the like. The freight hoisting arrangement as indicated above is usually employed together with fork lift trucks, that is to s with a set of fork lift trucks on board the ship and a set of fork lift trucks on land, for respective loading and unloadin the freight hoisting arrangement. If desired the loading and unloading can occur via extra equipment which is connected to freight hoisting arrangement, such as various types of convey belts or similar transport means. In many instances the fork trucks place or fetch their respective unit of freight direct on the loading platform of the freight hoisting arrangement, position outside the side of the ship or in a position in the hoist shaft in the ship. When discussing fork lift trucks the is meant not only trucks with loading forks, but also trucks other gripping or lifting means which are specifically adapte according to particular types of units of freight. From NO patent 139,162 a system is known where a loading platform can be swung from a position within the ship to a position outside the side of the ship, so that a fork lift tr on the quay can place the freight directly on or fetch the freight directly from the loading platform. The known freight hoisting arrangement is arranged so that the hoist carriage b means of an outwardly projecting arm, which is revolvable abo first vertical axis on the hoist carriage, can swing the load platform around about a second vertical axis. By this the loa platform can be swung around along an arc of a circle about t said first axis. By employing a pair of parallel arms an arm system in the shape of a parallelogram can be formed between hoist carriage and the loading platform, so that the loading platform during the swinging around along said arc of a circl parallel displaced between a fore-and-aft position in a posit in the hoist shaft and a fore-and-aft position in a position side the side of the ship. As a consequence of the necessary movement along an arc of a circle the loading platform is sub jected at the same time as it is moved transversely also to a certain fore-an-aft movement relative to the ship. This neces fore-and-aft movement is undesired for several reasons. Such undesired fore-and-aft movement makes difficult an effective utilisation of the length dimension of the freight opening or side port opening. In addition such a swinging movement or s fore-and-aft movement can create certain problems in control the freight during movements of the loading platform. Another known construction is described in NO patent ap cation 874624. In this construction the loading platform can moved in a position in a hoist shaft within the ship and in position outside the side of the ship by means of a guide co which is rota able in the ship for swinging the loading plat around between said positions. The turning of the loading pl form relative the guide column can occur by means of hydraul mechanical or electro-mechanical drive systems. Also in this instance the movement of the loading platform in a pivotal a involves an undesired movement of the loading platform in th fore-and-aft direction. With the present invention the aim is a solution with w a precisely rectilinear movement of the loading platform can ensured with relatively simple means in a horizontal directi between the position in the hoist shaft and the position out the side of the ship. The freight hoisting arrangement according to the inven is characterised in that a first support arm is pivotably mo at the one end about a first vertical axis on the hoist carr and at the other end is pivotably mounted about a second ver axis on one end of the second support arm, while the other e the second support arm is pivotably mounted about a third ve cal axis on the loading platform, and that a first positive means connects the other end of the first support arm to the loading platform, while a second positive guide means connect the first end of the second support arm to the hoist carriage for positively guiding the loading platform in a fore-and-aft position in a rectilinear transverse movement between the position within the hoist shaft and the position outside the of the ship. In the afore-mentioned known constructions (NO patent 139,162 and NO patent application 874624) the undesired fore- aft movement of the loading platform represents that one can employ two freight hoisting arrangements in parallel. Either involves a poor utilisation of the area of the freight openin the side port opening or alternatively it involves that one c not operate two freight hoisting arrangements totally indepen dently of each other, without their coming into conflict with each other. In addition - as a consequence of necessary relat movement between the loading platforms -one will certainly no able to employ two loading platforms simultaneously for effec handling of an especially long and narrow freight. According the present invention this problem can be easily avoided. In a freight hoisting arrangement according to the inven tion, which comprises a pair of hoist carriages which are sep rately movable along their respective guide column in the hoi shaft and are revolvable separately about their respective pa of support arms for swinging the respective loading platform about between a position in the hoist shaft and a position ou side the side of the ship, the objective is to be able to han a freight jointly by the two loading platforms and in this co nection the freight hoisting arrangement is characterised in loading platforms of the hoist cariages are adapted to be cou together hydraulically and/or mechanically for movement joint vertically in the hoist shaft or horizontally between a posit in the hoist shaft and a position outside the side of the shi Further features of the present invention will be eviden from the following description having regard to the accompany drawings, which show a preferred embodiment, where: Fig. 1 shows in plan elevation two hoist carriages in fu lines in a position within the ship and in broken lines in a position outside the side of the ship. Fig. 2 shows in plan elevation the one hoist carriage on larger scale and with several details, illustrated in broken lines in a position within the ship and in full lines in a position outside the side of the ship. Fig. 3 shows in side elevation a section of the hoist carriage according to Fig. 1 and 2. Fig. 4 shows, a detail of Fig. 3 with certain parts remov for the sake of simplicity. In Fig. 1 there is shown a section of a ship, where th illustrated just within the side 10 of the ship a hoist sha which at opposite ends carries a guide column 12 and 13 res tively for their respective hoist carriage 14 and 15. The h carriages 14, 15 are designed as mirror images and substant identical and are adapted to function individually in an eq lent manner. On a horizontal under member 16 of the hoist carriage 1 15) there is fastened a turntable or a combined support and rotary bearing 17, with which the under member 16 is fastene the one end 19 of a first support arm 20, for revolving the support arm 20 about a first vertical axis 19a (see Fig. 2). second end 21 the support arm 20 is provided with a combined support and rotary bearing 22 with which the first support a is fastened at a first end 24 of a second support arm 25, so these are pivotable relative to each other about a common, s vertical axis 24a. At a second end 26 of the support arm 25 is fastened a support and rotary bearing 27 with which there fastened a loading platform 29, for revolving the loading pl form 29 about a third vertical axis 28a relative to the supp arm 25. A power means in the form of a hydraulic cylinder 30 ha one end 31a fastened to the hoist carriage 14 (or 15) and th opposite end 31b fastened to the first support arm 20. In th pushed out position of the power means the loading platform assumes a position within the ship, such as shown by the ful lines in Fig. 1, and in the retracted position of the power the loading platform 29 assumes a position outside the side the ship, such as shown by broken lines in Fig. 1. As shown in Fig. 2 a first positive guide means 32 is arranged in the form of a piece of wire between the hoist carriage 14 and a guide and fastening means 33 on the said f end 24 of the second support arm 25. More specifically the w extends from a first fastening point .34 on the hoist carriag via a first guide means 35 on the hoist carriage 14, substan ally parallel to the first support arm 20 to the guide and fastening means 33 on the second support arm 25 and further stantially parallel to the support arm 20 and via a second gu means 36 on the hoist carriage 14 back to a second fastening point 37 on the hoist carriage 14. The guide means 35 and 36 arranged at a considerable radial distance from the first ver cal axis 19a and are arranged on their respective mutually opposite sides of the hoist carriage 14. Correspondingly the guide and fastening means 33 is arranged at a considerable ra distance from the second vertical axis 24a on the support arm By swinging the arm 20 about the axis 19a from the position s in broken lines to that shown in full lines in Fig. 2, the se arm 25 is positively guided to swing an equivalently propor¬ tionate pivotal angle. By means of the positive guide means 3 one can ensure that the third vertical axis 28a is moved pre¬ cisely rectilinearly and transversely of the freight opening the port opening by said revolving of the arm 20 relative to hoist carriage 14, such as shown by the line 18. According to Fig. 2 a second positive guide means 38 is shown in the form of a piece of wire between the loading plat 29 and a guide means 23 and a fastening point 39 (Fig. 4) on second end 21 of the first support arm 20. More specifically wire extends from a first fastening point 40 on the loading p form 29 via a first guide means 41 on the loading platform 29 substantially parallel to the second support arm 25 to the gu means 23 and the fastening point 39 on the first support arm and further substantially parallel to the support arm 25 and a second guide means 42 on the loading platform 29 back to a second fastening point 43 on the loading platform. By means o the positive guide means 32 and 38 one can ensure that with e angular movement of the first support arm 20 relative to the hoist carriage 14 one gets an equivalent angular movement of second support arm 25 relative to the support arm 20 together with an equivalent angular movement of the loading platform 2 relative to the support arm 25. In this way one can ensure th at the same time as the third vertical axis 28a of the loadin platform 29 moves horizontally at right angles to the longitu nal direction of the ship, the loading platform 29 is moved intended fore-and-aft position displaced precisely parallel between the said inner and the said outer position. In Fig. 1 there is shown a locking member 44 for mechan cally locking together the two loading platforms 29 of the h carriages 14 and 15, so that the loading platforms can be mo jointly, towards and away from the two positions which are i strated in Fig. 1 as well as towards and away from different vertical positions within the hoist shaft 11. Alternatively two hoist carriages 14 and 15 and associated loading platfor can be moved jointly and in a correspondingly locked manner relative to each other, for corresponding linear movement an corresponding speed, by means of a common control of the hyd lic control circuits for the two hoist carriages. By this on for example handle a relatively large unit of freight jointl the two hoist carriages and their associated loading platfor Without being shown specifically herein, it shall be em sized that the support arms 20 and 25 in addition to the swi movement from and to a posiion in the hoist shaft to and fro position outside the side of the ship can also be swung in a opposite direction from and to the position in the hoist sha and from a position further inwards in the ship. By this the freight on the loading platform can also be transported to a certain extent horizontally into the ship, where this is nec sary. If desired one can ensure by altering the geometry of t positive guide means under certain circumstances that the pl form is moved in a deviating direction from said fore-and-af position, for example 90° relative to the longitudinal direc of the ship, that is to say from the fore-and-aft direction the transverse direction. For example this can be especially significance on transportation internally in the ship.

Claims: PATENT CLAIMS. 1. Freight hoisting arrangement, especially for use on boar ship in connection with a freight opening, especially a side opening, comprising at least one hoist carriage (14, 15) whic moveable along a guide column (12, 13) in a hoist shaft (11) which connects the freight opening or the side port opening t different decks of the ship, where the hoist carriage (14, 15 carries via a pair of support arms (20, 25) a loading platfor (29) pivotably mounted relative to the hoist carriage for mov ment of the loading platform horizontally from a fore-and-aft position from a position within the hoist shaft (11) of the s via the freight opening or the side port opening to a fore-an aft position in a position outside the side (10) of the ship, loading platform (29) being moveable in a horizontal directio relative to the hoist carriage (14, 15) by means of a power means, such as a pressure medium cylinder (30), which is pref ably jointed to the hoist carriage (14, 15), characterised in that a first support arm (20) is pivotably mounted at at firs end (19) about a first vertical axis (19a) on the hoist carri (14, 15) and at a second end (21) is pivotably mounted about second vertical axis (24a) on first end (24) of the second support arm (25), while second end (26) of the second support (25) is pivotably mounted about a third vertical axis (28a) o the loading platform (29), and that a fist positive guide mea (32) connects first end (26) of the second support arm (25) t the hoist carriage (14, 15), while a second positive guide me (38) connects second end (21) of the first support arm (20) the loading platform (29), for positively guiding the loadin platform (29) in a fore-and-aft position in a rectilinear tr verse movement between the position within the hoist shaft ( and the position outside the side (10) of the ship. 2. Freight hoisting arrangement in accordance with claim 1 characterised in that the first positive guide means (32) co sists of a piece of wire two opposite ends of which are fast to the hoist carriage (14, 15) and the middle portion of whi fastened via a fastening member (33) to first end (24) of th second support arm (25), and that the second posittive guide means (38) consists of a piece of wire two opposite ends of are fastened to the loading platform (29) and the middle por of which is fastened via a fastening member (39) to second e (21) of the first support arm (20). 3. Freight hoisting arrangement in accordance with claim 2 characterised in that the first positive guide means (32) is supported just by the respective fastening (34, 37) on the h carriage against a stationarily arranged, arcuate guide mean (35, 36) which is arranged at a considerable radial distance the first pivotal axis (19a), and that the second positive g means (38) is supported just by the respective fastening (40 on the loading platform (29) against a stationarily arranged arcuate guide means (41, 43) which is arranged at a consider radial distance from the third pivotal axis (28a), and a gui means (23) at another radial distance from the second pivota axis (24a) . 4. Freight hoisting arrangement in accordance with one of claims 1-3, comprising a pair of hoist carriages (14, 15) wh are separately moveable along their respective guide column ( 13), in a hoist shaft (11) and are separately revolvable abo their respective pair of support arms (20, 25) for swinging respective loading platform (29) between a position in the h shaft (11) and a position outside the side (10) of the ship. characterised in that loading platforms (29) of the hoist carriages (14, 15) are adapted to be coupled together hydraul cally and/or mechanically (14, 15) for joint movement vertica in the hoist shaft (11) and horizontally between a position i the hoist shaft (11) and a position outside the side (10) of ship.

Applicants: TRANSPORT SYSTEMS DEV A S, TRANSPORT SYSTEMS DEVELOPMENT A/S
Application year: 1989
Main classification: B63B27
IPC codes: B63B27