EP0943537B1 - Hoisting device - Google Patents

Description

The invention relates to a hoist for receiving, suspending and transporting a dinghy carried on a yacht, with an essentially horizontally projecting boom, which has a free end and a fastening end, a hoist rope with a load hook, the hoist rope coming from the attachment end of the boom to one on the Boom provided, or relative to the boom fixed fixed deflection guided and from this is deflected below, and at least one relative to the boom movably arranged, interacting with the hoist rope Deflection.

G 81 01 588.7 is a hoist of the type mentioned known. This has one for receiving a dinghy Boom on which a fixed deflection for a hoist rope is attached is. The deflection movable relative to the boom consists of a pulley. This is together with the load hook provided on the bottom block of a pulley. The the lifting rope coming from the fixed deflection wraps around the pulley the bottom block about 180 ° and is at one end on the boom attached. Thanks to the pulley principle used with two load-bearing rope cross sections on which the load of the dinghy hangs, the rope force in the hoist rope is halved, which must be used to lift the dinghy. With everyone Pulley saves energy at the expense of the way. The Length of the hoisting rope that is used to lift the dinghy must therefore be double in the subject of G 81 01 588.7 as large as the stroke caused. The arrangement is common chosen when the relatively heavy dinghy is manually operated should be raised. Usually two such hoists used to safely hold a dinghy.

To firmly attach the dinghy to the hoist for transport, it is firmly against the underside by means of the hoist rope the boom pulled and the hoisting rope with, for example a slip cleat.

A transport position close to the yacht is used for transport aimed for the dinghy. So this will be so as far as possible towards the yacht at the bottom of the boom established. The well-known hoist points to the bottom of the Cantilever additional flanges against which the dinghy is against moored with its side rims. In the embodiment of the item the G 81 01 588.7 is an inflatable boat. The dinghy is initially on a straight load path has been pulled up and is in the position shown in contact with the flanges. These have the inflatable boat little shifted towards the yacht in the final transport position, in which it set against the flanges of the boom is.

With the known hoist, a dinghy can only be held, when it is close to the yacht in the water and from that position can be lifted vertically. For a yacht whose Rear mirror is provided with a bathing platform, and that Dinghy taken in front of the bathing platform lying in the water must be, it is very bad. The boom is too short for this application.

A hoist with the characteristics of the The preamble of claim 1 is known from G B 391161

An embodiment of the known hoist with a longer one Outrigger that would cantilever over a bathing platform a dinghy disadvantageously only at such a large distance to the yacht that the dinghy in front of the bathing platform to be transported floating over the water. It would be cannot be determined close enough to the yacht.

Other hoists are known, in which the dinghy initially raised on a vertical load path and then to Yacht is moved into the transport position. To drive in come, for example, telescopic boom or fixed trolley boom with a movable trolley Load hook for use. The solutions are mechanically special complex and expensive and prone to repair.

The invention has for its object a simple manufacturable and manageable safe lifting device for taking up, Launching and transporting one carried on a yacht To create dinghies with which one in front of a bathing platform dinghy lying in the water taken over them and in a transport position close to the yacht is movable.

The object is achieved in that on the free end of the boom a swivel is provided over which a pivoting arm hanging downwards is pivoted is that the movable deflection on the swivel arm arranged and together with this to the boom upwards is pivotable that that led down by the fixed deflection Lift rope is guided over the movable deflection and from this hangs vertically, and that the load hook one has a stop interacting with the movable deflection, the slipping of the load hook over the movable Redirection prevented.

This measure makes it very easy to handle and manufacture and safe hoist, in which the Load path on which the dinghy when taking out of the water and when moving into water is moved from a vertical Section and a circular section. The complete load path is advantageously by simple Obtaining or slackening of the hoisting rope almost automatically. No further drives are required to make the movements to control. The proposed hoist is because of the simple mechanics particularly safe, low-maintenance and simple manageable.

To a dinghy hanging from the hook on the load hook lift, the hoisting rope must be hauled in. The dinghy will be there initially on a vertical load path at the bathing platform lifted over out of the water until the load hook stops abuts the movable deflection of the swivel arm. By the swivel arm then becomes further hauling in of the hoist rope The boom is pivoted upwards until the dinghy touches the Boom creates. The load hook and the dinghy on a circular path across the bathing platform to the Yacht swung out.

The movable deflection preferably has one on the Swivel arm on a rotating pulley, over which the hoist rope is led. The hoist rope can thus be used with little resistance redirect. The fixed redirection is also a matter of course advantageously provided with a rotating pulley. In this way, the efficiency of the Hoist.

An advantageous development of the hoist has one Swivel arm on which a pulley with several rope pulleys is provided. The hoisting rope is guided over all pulleys. The rope pulley of the movable, which is rotatably mounted on the swivel arm Deflection forms a fixed role of the pulley.

The use of the pulley principle in connection with the proposed construction does not ostensibly pursue that The goal is to reduce the rope force to pull in the hoist rope but rather the outreach of the boom with swivel arm enlarge. The embodiment described above without pulley, where the hoist rope has a single one at the bottom End of the swivel arm is rotatably mounted pulley, lets do not project the load hook as far as the jib cantilevered over the yacht. The reason for this is the relative great rope strength, both in the vertically hanging down Piece of the lifting rope as well as in the obliquely upwards Fixed deflection led piece of the lifting rope acts.

By reducing the rope force of the hoisting rope with the help a pulley system, for example, the load of the dinghy distributed over three rope cross sections, the rope force in the part of the hoist rope leading diagonally upwards towards the fixed deflection reduced to a third. The swivel arm is thereby pivoted towards the yacht with less force and thus the load hook continues to unload.

It is particularly favorable if the fixed deflection on the boom in the swung-up state of the swivel arm above the pulley of the movable deflection is arranged, because in this case it is from the fixed deflection to the movable one Rope is guided vertically and the rope in the Lifting rope acting force to hold the swung up Swivel arm is minimized.

Also in the training of the proposed hoist a block and tackle as soon as the load hook stops of the movable deflection, the rope force in the hoist rope be raised to swing the swivel arm upwards. The Pulley does not work after the load hook is struck more so that the rope force no longer corresponds to the number the pulley rope pulleys and at the expense of the one to be caught up Lifting rope is reduced.

The advantage of the proposed pulley solution is So the main thing is that it slants upwards to the Fixed deflection led rope during lifting respectively Lowering the dinghy on the vertical section of the Load path with a much lower force on the swivel arm pulls as in the first version without pulley. The As a result, the swivel arm pivots more vertically and increases the overhang of the Load hook.

The more pulleys the pulley has, the less the rope force in the hoist rope during lifting respectively Lowering the dinghy on the vertical section of the Load path and the closer the position of the swivel arm approaches the vertical.

The number of pulleys used for the pulley should not, however, be chosen too large since the profit is on Outreach decreases with increasing number of pulleys however, the length of the hoisting rope to be obtained according to the Number of pulleys multiplied. Have in practice Pulleys with two to three rollers proved to be useful.

A pulley with three pulleys and triple-reeved Rope has proven itself for a certain stroke triple cable length must be obtained.

Around the hoist rope when the swivel arm is swung upwards to relieve the dinghy even in the event of failure of the hoist rope in the transport position is to be secured a locking device for locking the swivel arm is provided. For the sake of simplicity, the locking device can have a bolt which is pivoted upwards of the swivel arm both the boom and the swivel arm at least partially penetrates such that the swivel arm can't swing down.

It is expedient to store and drive the Lift rope provided a rope drum. In a preferred one The rope drum can be driven by a motor. Of course can advantageously also be a manually operated Rope drum can be provided.

For the sake of simplicity, the rope drum has an electric one Gear motor on. This can be protected inside the Rope drum can be provided. Such a gear motor is very low maintenance, and there is only an electrical connection needed to operate the hoist.

Another advantageous embodiment results when the Boom at least in the area in which the swivel arm is pivotable above, a U-shaped profile open at the bottom has and the swivel arm in the swung up state has a height that is approximately the height of the legs of the U-shaped Profile. The swivel arm can preferably up to can be swiveled upwards into a position parallel to the boom be and in this position between the legs of the U-shaped Profiles disappear. The swivel arm simply points for this one between the pulley of the movable deflection and the swivel joint arranged between the pulley Rope pulley on. Because of the pulley, it turns Direction of rotation of the pulley and runs in the opposite direction Direction of rotation of the pulley of the fixed deflection. In this way is the lifting rope coming from the attachment end of the boom not over the top but over the bottom of the pulley the movable deflection led. This has the advantage that the movable deflection by means of the hoist rope far behind can be lifted up towards the boom.

Rope pulley by means of the lifting rope guided on its underside can be raised far up to the boom.

Fig. 1

eine Seitenansicht auf das Hebezeug mit einer einzelnen Seilrolle als bewegliche Umlenkung,

Fig. 2

einen Kräfteplan des Hebezeugs gemäß Fig. 1,

Fig. 3

eine Seitenansicht des Hebezeugs mit einem Flaschenzug mit drei Seilrollen,

Fig. 4

einen Kräfteplan des Hebezeugs gemäß Fig. 3,

Fig. 5

eine ausschnittsweise Ansicht des Auslegers und des Schwenkarms mit einer dem Flaschenzug zwischengeschalteten Seilrolle,

Fig. 6

eine Ansicht gemäß Fig. 5 mit nach oben geschwenktem Schwenkarm.

The invention is illustrated by way of example below using two exemplary embodiments and described in detail using the figures. Show it:

Fig. 1

a side view of the hoist with a single pulley as a movable deflection,

Fig. 2

1 a force plan of the hoist according to FIG. 1,

Fig. 3

a side view of the hoist with a pulley system with three pulleys,

Fig. 4

3 shows a force plan of the hoist according to FIG. 3,

Fig. 5

a partial view of the boom and the swivel arm with a pulley interposed between the pulley,

Fig. 6

a view of FIG. 5 with the swivel arm pivoted upwards.

According to the drawing, the hoist 1 consists of one on one Yacht 2 attached, essentially horizontally projecting Boom 3, a free end 4 and this opposite has a fastening end 5. At the attachment end 5 of the A bracket 6 is arranged on the boom 3, which is on the deck 7 the yacht 2 is attached. A hoist rope 8 with a load hook 9 is coming from the fastening end 5 of the boom 3 to one provided on the boom 3 fixed deflection 10. Of this is the lifting cable 8 deflected obliquely downwards. To the free end 4 of the boom 3, a pivot joint 11 is provided, via the one hanging down swivel arm 12 rotatable is articulated. At the hanging end of the Swivel arm 12 is a movable relative to the boom 3 Deflection 13 arranged and together with the swivel arm 12 can be pivoted upwards towards the boom 3. That of the fixed redirection 10 downward-directed hoist rope 8 is movable over the Deflection 13 guided and depends vertically from this. The Load hook 9 has a cooperating with the movable deflection 13 Stop 14 on the slipping away Load hook 9 prevented via the movable deflection 13. The movable deflection 13 is in the present embodiment with a rotating pulley 13a and the fixed deflection also provided with a rotatably mounted pulley 10a.

The dinghy B is initially on a vertical Load path 15 on a bathing platform 16 on the transom 17 of the yacht 2 is attached, pulled upwards. As soon as the stop 14 of the load hook 9 on the movable deflection 13 strikes, the tender B is on a circular Load path 18 to the boom 3 pivoted upwards. This Transport position is shown in dashed lines in Figure 1.

While the dinghy B moves on the vertical load path 15 is, the swivel arm 12 in one to the transom the yacht swiveled inclination. The unloading of the Load hook 9 is due to the inclined position of the swivel arm 12 a little bit reduced.

In Figure 2, a force plan is shown, which on the Swivel arm 12 shows acting forces. These are in detail the rope force Fs1, which is essentially due to the mass m of the dinghy and the low weight M of the light-weight swivel arm, which is simplistic attacks in the center of gravity of the swivel arm. The rope force Fs1 works equally in the vertically hanging one Piece of the lifting rope 8 and in the diagonally upwards for fixed deflection 10 guided piece of the lifting rope 8. This rope forces Fs1 of the two pieces of lifting rope acting on the movable deflection 13 can be combined into a resulting force R1. The resulting force R1 acts as in FIG. 2 see almost in the horizontal direction and pulls the swivel arm 12 far to the transom 17 of the yacht 2.

In Figure 3 is a further development of the proposed hoist shown, on the swivel arm 12 a pulley 19th with three pulleys 13a, 20 and 21 is provided. The above the fixed deflection 10 downwardly directed hoisting rope 8 is over the Rope pulleys 13a, 20 and 21 of the block and tackle 19 guided. The Load hook 9 is on the bottom block 19a of the block and tackle 19 arranged. With this construction the dinghy B also on a vertical load path 15 and a circular one Move load path 18 up to the boom. The Swivel arm 12, however, points while the dinghy B on the vertical load path 15 moves, less inclination than when this occurs in the embodiment according to FIG Case is. This results from the lower rope force Fs2 in Hoist rope 8, during the movement of the dinghy on the vertical Section of the load path. The rope force is reduced by the block and tackle 19 with triple reeving hoist rope to a third of those caused by the mass m of the dinghy Weight force.

In Figure 4 is the force plan for the construction according to Figure 3 shown. From this plan of forces it is easy to see that the cable force Fs2 in the from the movable deflection 13 to Fixed deflection 10 guided rope piece only 1/3 of that through the Mass m of dinghy B caused weight. In each of the three vertically downward hanging rope pieces of the Pulley 19 also acts the rope force Fs2. All three Hoist pieces of the pulley hold the whole together Weight of dinghy B.

In Fig. 4 is at an angle to the fixed deflection 10 Lift rope piece entered the rope force Fs2 and are the rope forces of the three vertical hoist pieces of the pulley 3 * FS2 summarized. These two can be a resultant Summarize force R2 on the swivel arm 12 draws. The resulting force R2 pulls in as in FIG. 4 recognize, almost in the vertical direction on the swivel arm 12. It is readily apparent that the pivot arm 12 is in use a block and tackle 19 has a smaller inclination having.

The inclination decreases with increasing number of pulleys Pulley 19 from and approaches the vertical.

To lock the swivel arm 12 in the direction of the boom 3 upward swung position, is a locking device 23 provided. This consists in the exemplary embodiments shown from a bolt 24 which is pivoted upwards Condition of the swivel arm 12 both the boom 3 and the Swing arm 12 penetrates in recesses, so that the swivel arm 12 can not swing back down. The bolt 24 is for releasing the dinghy B at any time from the locking device 23 removable, so that the swivel arm 12 through Relaxation of the hoist rope 8 can be swung out.

For storing and driving the hoist rope 8 is a motor drivable rope drum 25 with an electric gear motor 26 provided.

In the embodiment shown in Fig. 5, the boom has 3 in the area in which the swivel arm 12 upwards is pivotable, a downwardly open U-shaped profile 27 on. The swivel arm 12 with a box-shaped cross section has swung upward to a height h, which is about the Height of the legs of the U-shaped profile 27 corresponds. The Swivel arm 12 can be seen in FIG. 6 up to one Boom 3 parallel position swivels up and disappears in this position between the legs of the U-shaped Profiles 27. For this purpose, the swivel arm 12 simply has one between the pulley 13a of the movable Deflection 13 and the pivot 11 arranged, the pulley 19 intermediate pulley 28 on. Because of the pulley interposed 28 reverses the direction of rotation of the pulley 13a compared to the above exemplary embodiments runs counter to the direction of rotation of the pulley 10a Fixed deflection 10. In this way it is from the fastening end 5 of the boom 3 coming hoisting rope 8 not over the top but over the underside of the pulley 13a of the movable Redirection 13 performed. This has the advantage of being portable Deflection 13 from the lifting rope engaging on its underside 8 can be raised far up to the boom 3.

LIST OF REFERENCE NUMBERS

1

hoist

2

yacht

3

boom

4

free end

5

attachment end

6

carrier

7

deck

8th

hoist rope

9

load hook

10

Fixumlenkung

10a

pulley

11

swivel

12

swivel arm

13

movable deflection

13a

pulley

14

attack

15

vertical load path

16

bathing platform

17

transom

18

circular load path

19

pulley

19a

Bottom block

20

pulley

21

pulley

23

locking device

24

bolt

25

cable drum

26

electric gear motor

27

U-shaped profile

28

intermediate pulley

B

dinghy

H

height

S

height

Claims (11)

1. Hoisting device for lifting, lowering and transporting a dinghy (B) carried on board a yacht (2), with an essentially horizontally protruding jib (3) having a free end (4) and a mounted end (5), a hoisting cable (8) with a load hook (9), where the hoisting cable (8) is guided from the mounted end (5) of the jib (3) to a fixed guide pulley (10) with a sheave (10a) provided on the jib (3), and deflected downwards from there, and at least one guide pulley (13) that moves relative to the jib (3) and interacts with the hoisting cable (8), characterised in that a pivot joint (11) is provided on the free end (4) of the jib (3), via which a downwardly suspended pivot arm (12) is attached in pivoting fashion, in that the moving guide pulley (13) is located on the pivot arm (12) and, together with it, can pivot upwards towards the jib (3), in that the hoisting cable (8) guided downwards from the fixed guide pulley (10) is guided over the moving guide pulley (13) and hangs vertically from it, and in that the load hook (9) has a stop (14) that interacts with the moving guide pulley (13) and prevents the load hook (9) from slipping back over the moving guide pulley (13).
2. Hoisting device according to Claim 1, characterised in that the moving guide pulley (13) has a sheave (13a) mounted in rotating fashion on the pivot arm (12).
3. Hoisting device according to Claim 2, characterised in that a pulley block (19) with several sheaves (13a, 20, 21) is provided on the pivot arm (12) and guides the hoisting cable (8), where the sheave (13a) mounted in rotating fashion on the pivot arm (12) forms a fixed pulley of the pulley block (19).
4. Hoisting device according to Claim 2 or 3, characterised in that the fixed guide pulley (10) on the jib (3) is located above the sheave (13a) of the moving guide pulley (13) when the pivot arm (12) pivots upwards.
5. Hoisting device according to one of Claims 1 to 4, characterised in that a locking device (23) is provided in order to lock the pivot arm (12) in position when pivoted upwards towards the jib (3).
6. Hoisting device according to Claim 5, characterised in that the locking device (23) has a bolt (24) that at least partially penetrates both the jib (3) and the pivot arm (12) when the pivot arm (12) pivots upwards, in such a way that the pivot arm (12) cannot pivot downwards.
7. Hoisting device according to one of Claims 1 to 6, characterised in that a cable drum (25) is provided to take up and drive the hoisting cable (8).
8. Hoisting device according to Claim 7, characterised in that the cable drum (25) can be driven by a motor.
9. Hoisting device according to Claim 8, characterised in that the cable drum (25) has an electric geared motor (26).
10. Hoisting device according to one of Claims 1 to 9, characterised in that, at least in the area in which the pivot arm (12) can pivot upwards, the jib (3) has a profile (27) in the shape of an inverted "U", and in that the pivot arm (12) has a height (h) when pivoted upwards that is roughly equal to the height (S) of the leg of the U-shaped profile (27) and can be pivoted upwards until it is parallel to the jib (3).
11. Hoisting device according to one of Claims 3 to 10, characterised in that the pivot arm (12) has a sheave (28), which is inserted in the pulley block (19) and located between the sheave (13a) of the moving guide pulley (13) and the pivot joint (11), where sheave (13a) and the sheave (10a) of the fixed guide pulley (10) rotate in opposite directions.

Images