DE843666C - Boat davit - Google Patents

Description

Boat davits The invention relates to boat davits in which each The davit arm is widened at its foot and its underside is convex is and can roll on a guideway; this guideway runs essentially horizontal, but can be curved slightly convex. however, it becomes a horizontal one Guide track preferred. When the davit arm is inboard, the inside rests End of his foot on the guideway and lies slightly inboard opposite the point of the davit arm where the boat is suspended. When the pulley blocks are released the arm swings outwards, with the downwardly bulging surface of its Rolls the foot on the guideway until its front end rests on the guideway and the davit arm is in its extreme outboard position.

When the foot rolls on the guideway, this can be an effort show that its lower surface slides back on the guideway; to prevent this, the lower surface of the foot is provided with teeth that fit into teeth on the guideway intervention. Other means have also been used to prevent slippage prevent, e.g. B. ropes, one at the rear and one at the front of the foot is attached and the former runs forwards and the latter runs backwards and both of which are anchored to the frame. It is also known the guideway to give a steep slope downwards and outwards.

Instead of providing the foot and the guideway with teeth, according to of the invention provided that these keep smooth surfaces and on one or each A bolt or roller protrudes from the side of the rear end of the foot - the or which attack the rear of a curved, rear guideway that is designed in this way is that when the arm swings outboard, the lower surface of the foot can roll freely on the support track, but over their whole or is prevented almost over its entire path from reversing towards this path slide.

As soon as one of the bolts or rollers hits the top of the rear track reached, he can lay against a stop that prevents the movement of the arm limited to the outboard.

When the main guideway runs in a straight line and when the curvature the underside of the foot forms an arc of a circle, the rear guideway runs after a cycloid. In order to prevent the The base of the davit arm slides on the support guide track, a bolt or a Roller may be provided on one or each side of the front end of the foot, the attack forward on a front guideway or on one of a pair of front guideways, which form the counterpart to the rear guideway.

To limit the movement of the davit arm inboard, any suitable devices may be provided, e.g. B. a stop at the top of the front guideway or simply a stop permanently attached behind the davit arm.

The front and the rear guideway can be arranged in two vertical ways Location fixed panels may be formed, one of which extends on each side of the lower Part of the foot of the davit arm is one and in which arcuate slots are provided; instead, a recess can be provided in each of the plates be, the two edges of which form the guideways.

An embodiment of the invention is shown in the drawing, for example FIG. 1 shows a side view of the boat davit and FIG. 2 a view from the inboard.

According to the drawing, the davit arm i has a widened foot part 2 with a convex underside 3 that can roll on a fixed guideway, which is located on a frame 5 lying on deck; the guiding track 4 is arranged horizontally, but can also be either inboard or outboard be inclined slightly downwards and can be used in place of a flat surface in the Be somewhat convex lengthways. The upper surface of the fixed guideway 4 is even, d. H. not toothed.

When the davit arm, i is inboard, as is at full extension Lines in Fig. I is shown, the inner end of the foot 2 rests on the guide track 4 in a position opposite the point of the davit arm i at which the to the ship Corresponding boat 6 is suspended to lie somewhat inboard. When the pulleys 7 are released, the davit arm swings automatically outwards, whereby the arched Underside 3 of his foot on the guide track 4 in the manner of a cradle to the outside unrolls until the front end of the foot 2 rests on the guide track 4; where the Davit arm i occupies its outboard position shown in dash-dotted lines in FIG.

During the rolling movement of foot 2 of the davit arm on the guideway 4, it tends to slide backwards in relation to the track. This is going through Bolts or rollers 7x prevents the sideways from the opposite sides of the foot 8 is present. These curved guideways 8 are through the outward Edges formed by cutouts in vertically arranged panels 9, each other are attached opposite to both sides of the davit arm and side walls of the frame of the davit attached to the deck.

Once the bolts or rollers 7x the top of the curved guideways Reaching 8, they bump against stops passing through the rear parts of the upper Edges io are formed by punchings in the plates 9, as in dashed lines Lines shown in Figure i; so that they follow the movement of the davit arm i limit outboard.

In a similar way, with the swinging movement of the davit arm i will follow inboard, the tendency of his foot 2 to slide forward on the guideway 4; by curved leading edges ii prevents the inward from punching out the Plates 9 protrude and against which bolts or rollers 12 lay on the side protrude on both sides of the front end of the foot 2.

At the outer end of the swing movement of the davit arm 2 pivots inboard. his foot, .seinem rear end to having a smaller radius of curvature compared to the Hauptschwenkfläche3. As a result, the - movement of the rollers 7x has an enlarged horizontal component and for this reason flat notches 13 are provided at the lower ends of the guideways 8. In the same way, flat notches 14 at the lower ends of the guideways ii correspond to the enlarged horizontal movement components of the rollers 12 when the foot 12 of the davit arm i swings outwardly onto its front end at the end of the swinging movement.

The inboard swinging movement is caused by the bolts or rollers 12, which are bounded against the front parts of the upper edges of the cutouts in the plates 9.

Instead of the control tracks for the swinging movement of the davit arm To create cutouts, these tracks can of course be made using special '' curved '' Slots are formed in the plates 9, the upper ends of which engage with the Bolts or rollers at the rear end or at the front end of the foot stand and the swinging movements limit of the davitarmefi.

Claims (5)

PATENT CLAIMS: i. Boat davit in which each davit arm has a foot, the underside of which is convex and rolls on a guideway, characterized in that the foot (2) of the davit arm ('r) and the guideway (4) present smooth surfaces to one another and that one after the side protruding bolt or a roller (7x) protrudes on one or each side of the rear end of the foot and rests rearward on a curved rear guide track (8) which is designed so that when the arm is swung outboard, the lower surface of the The foot can roll freely on the support guide track (4) and is still prevented from sliding back during its entire or almost the entire path. 2. Davit according to claim i, characterized in that one Sliding movement of the foot (2) on the support guide track (4) during the swinging movement of the davit arm inboard by a bolt or roller (i2) or limited, provided on one or each side of the front end of the foot is and is forward against a front track (ii) or one of a pair from front guideways: 3. Davit according to claim i, characterized in that that the bolt or bolts or rollers (7x) provided at the rear end of the foot (2) Apply to stops (io) that cause the davit arm to swing outwards limit. 4. Davit according to claim 2 or 3, characterized in that the or the bolts or rollers (i2) provided at the front end of the foot (2) against each other Create stops (io), which cause the davit arm to swing inwards limit. 5. Davit according to claim i or 2, characterized in that the front and the rear guide track (8 or ii) through slots, recesses or cutouts in two vertical plates (9) are formed on either side of the foot (2) of the davit arm (i) are attached.