JPS629480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inter-panel angle control device for a marine ramp, and more particularly, to a device for controlling the angle between panels of a marine ramp, and more specifically, for controlling the relative angle of both panels of a marine ramp consisting of two rectangular panels whose respective short sides are hinge-connected. related to a device for

A marine ramp is equipped with two approximately rectangular panels that are rotatably connected on one side via a hinge fitting, and the end of one panel (the inner panel) on the opposite side of the hinge fitting is connected to the ship's hull. There is a system in which the panel is movably attached, and the end of the other panel (outer panel) on the opposite side from the hinge fitting is grounded on the shore. In this type of marine ramp, when stored, both panels are placed in an upright position with the outer panel superimposed on the inner panel, but when in use, the outer panel is placed on the virtual extension of the inner panel, or on this extension. It is usually placed at an inclined position forming a small angle with the Therefore, it is necessary to actively control the angular position of the outer panel relative to the inner panel so that the grounding edge of the outer panel can safely and reliably touch the shore when moving the marine ramp from the storage position to the use position.

Previous devices for controlling the angular position of the outer panel relative to the inner panel are mounted on the upper side edge portion of the outer panel, for example, to one panel, at a location adjacent to the hinge fitting, and that extends beyond the top of the hinge fitting to the inner panel for the other panel. a first pulley attached to the tip of an arm member of a predetermined length extending upward; a second pulley attached to a side edge portion of the other panel, that is, the inner panel, at a predetermined distance from the hinge fitting;
A steering wheel that is hung between both pulleys, with one end fixed to one of the pulleys at an appropriate position, such as adjacent to a second pulley, and the opposite end connected to a drive winch located inside the ship or elsewhere as appropriate. It consists of: However, in such conventional inter-panel angle control devices, the direction of the tension applied to the control cables suspended from the first and second pulleys is the direction that generates a sufficiently large moment around the hinge fitting. In other words, the direction of the tension is not placed in a direction that provides a sufficiently large lever for the hinge fitting.
In order to obtain the moment necessary to rotate the outer panel relative to the inner panel, it is necessary to increase the tension applied to the manoeuvre. Increasing the tension of the manoeuvring line not only increases the capacity of the drive winch and pulley, resulting in higher manufacturing costs, but also requires a position where both panels are located approximately in the same plane (i.e., the outer panel is located closer to the inner panel). Since the first and second pulleys collide with each other in the position where they are placed on the extension surface of the pulley, the dimensions of these pulleys cannot be increased without limit. Therefore, with the conventional inter-panel angle control device, not only is it not easy to increase the tension applied to the steering rope, but the increase in tension does not contribute much to the expansion of the moment. The present invention aims to solve this type of problem that occurs with previous devices.

An object of the present invention is to attach an arm member to one panel, adjacent to a hinge fitting rotatably connecting the outer panel to the inner panel, and extending to the top of the other panel, i.e., the inner panel. The direction of the steering cable suspended between the first pulley attached to the hinge and the second pulley attached to the inner panel at a predetermined distance from the hinge fitting is determined by the rotation that the tension of the steering cable generates around the hinge fitting. To obtain an inter-panel angle control device for a marine ramp capable of redirecting the moment in a direction that maximizes the moment and increasing the moment for rotating an outer panel around a hinge fitting without increasing the tension applied to a steering rope. There is a particular thing.

According to the present invention, a marine ramp adjacent to said hinge fitting is provided with two substantially rectangular flat panels having substantially the same width and whose respective short sides are rotatably connected via a hinge fitting. a first pulley attached to a position adjacent to the tip of an arm member of a predetermined length that is attached to the upper side edge portion of one panel and extends beyond the upper part of the hinge fitting to the upper part of the other panel; A second pulley is attached to the side edge of the other panel at a predetermined distance from the hinge fitting, and the second pulley is hung from both pulleys and one end is fixed at an appropriate position such as adjacent to one of the pulleys. A device for controlling the angle between both panels, consisting of a steering cable whose opposite end is connected to a drive source, with a first pulley mounted on one end and the opposite end rotatable at the tip of the arm member. and a link drive mechanism having one end rotatably connected to the intermediate portion of the length of the arm member and the opposite end rotatably connected to the intermediate portion of the length of the link member. A device for controlling the angle between panels of a marine ramp is obtained.

Now, an embodiment of the apparatus of the present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1, a marine ramp with a conventional inter-panel angle control system is shown. The marine ramp has an inner panel 11 rotatably attached to a hull 27 by a rotation shaft 16, and a hinge fitting 13 that allows the ship ramp to rotate freely at the tip of the inner panel 11 (the end opposite to the rotation shaft 16). and an attached outer panel 12. The inner panel 11 is provided with a pulley 22 at its tip, and a storage cable 21 suspended from the pulley 22 is guided to a storage drive winch 24 via a guide pulley 23 attached to a strut 20 on a hull 27. Accordingly, by actuation of the storage driving winch 24, the inner panel 11 is lowered from the storage position A through the intermediate positions B and C to the use position D, and vice versa.

The outer panel 12 includes arm members 14 of a predetermined length that are attached to the upper surface of both side edge portions at positions adjacent to the hinge fitting 13 and extend beyond the upper part of the hinge fitting 13 to the upper part of the inner panel 11. The conventional inter-panel angle control device includes a first pulley 15 attached to the tip of the arm member 14 on the outer panel 12, and a first pulley attached to the side edge portion of the inner panel 11 at a predetermined distance d from the hinge fitting 13. 2 pulley 2 and
It is hung on both pulleys 2 and 15, one end is fixed to a position adjacent to the second pulley 2 via appropriate metal fittings, and the opposite end is connected to a drive source such as another drive winch 17 via guide pulleys 18 and 19 on the support column 20. It consists of a steering cable 5 connected to. Therefore, when the driving winch 17 is operated to wind up the steering cable 5 at the intermediate position B, for example, the outer panel 12 is rotated in the clockwise direction P around the hinge fitting 13 to adjust the angle α between the two panels 11 and 12. The ground contact end (lower end at intermediate position B) of the outer panel 12 can be brought closer to the shore by increasing the height. However, in the conventional device, since the direction of the steering rope 5 hung on the first and second pulleys 15 and 2 is inappropriate, the tension applied to the steering rope 5 in this part is applied around the hinge fitting 13. It is not possible to generate a rotational moment of sufficient magnitude. In the intermediate position B, even if the tension applied to the steering rope 5 is increased, the moment required to rotate the outer panel 12 cannot be sufficiently increased because the lever on the hinge 13 of this tension is very small. As mentioned above, this is not possible. In addition, as shown in FIG. 2, when both the inner and outer panels 11 and 12 are placed on substantially the same plane, the first and second pulleys 15 and 2 interfere with each other, which may affect the way the steering cable 5 is guided. can also cause problems.

The outer panel 12 is provided with a flap 26 at the end opposite to the hinge fitting 13, and an activation cylinder 25 for pushing out the inner panel 11 from the storage position A is attached to a position adjacent to the support column 20 on the hull 27. .

FIG. 3 shows a marine ramp equipped with the inter-panel angle control device 10 of the present invention. The device shown in FIG. 3 differs from the device shown in FIG. 1 only in the manner in which the first pulley 1 is attached to the tip of the arm member 14, and the other parts are the same as the device shown in FIG. Therefore, only the first pulley 1 and its related parts will be described below.

As shown in FIG. 4, the first pulley 1 is attached to the tip of the arm member 14 via a link member 3 having a predetermined length. That is, the link member 3 with the first pulley 1 attached to the right end connects the arm member 14 with the tip via the rotation pin 7.
is attached to the tip of the A link drive mechanism 4 such as a fluid pressure cylinder connects its left end to the intermediate portion of the length of the arm member 14 via a rotation pin 9, and connects the right end of the piston rod 4P to the length of the link member 3 via a rotation pin 8. It is connected to the middle part of. Reference numeral 6 indicates a metal fitting for anchoring the control cable 5.

As shown in FIG. 5, the pivot pin 9 is connected to the arm member 1.
It is attached to the lower side of the side projecting portion 28 provided at 4.

In the device 10 of the present invention, since the first pulley 1 is attached to the tip of the link member 3, the drive mechanism 4
When rotating the link member 3 around the pin 7 by the operation, the first pulley 1 is moved to a desired position, that is,
The control cable 5 hung on the first and second pulleys 1 and 2
The hinge 13 can be placed in a position where tension is applied to produce maximum pivoting moment about the hinge 13. Therefore, the outer panel 12 can be moved around the hinge fitting 13 by simply changing the direction of the steering rope 5 that is hung on the first and second pulleys 1 and 2 without particularly increasing the tension applied to the steering rope 5. The turning moment can be increased. It is also an advantage of the present invention that the structure and handling are simple and inexpensive to manufacture.

6a and 6b show a modified embodiment of the embodiment of FIG. 3, in which an arm member 14', a link member 3',
The only difference from the embodiment of FIG. 3 is that the first pulley 1' and drive mechanism 4' are attached to the inner panel 11, and the second pulley 2' is attached to the outer panel 12. Figure 6a shows a state where the inter-panel angle is θ1,
Fig. 6b shows a state in which the inter-panel angle is enlarged to θ2. In both cases, since the first pulley 1' is placed at the optimum position, the first and second pulleys 1'
and 2', the tension applied to the steering cable 5' is adapted to generate a maximum pivoting moment around the hinge fitting 13'.

[Brief explanation of the drawing]

Fig. 1 is an overall layout diagram showing a marine ramp with a conventional device installed, Fig. 2 is a detailed view showing a part of the device in Fig. 1, and Fig. 3 shows a marine ramp with a device of the present invention installed. 4 is an enlarged detailed view showing the main parts of the device of the present invention, FIG. 5 is a sectional view taken along the line - of FIG. 4, and FIG. 6a is a modified embodiment of the device of FIG. 4. The schematic diagram shown, FIG. 6b, is a schematic diagram of the device of FIG. 6a in another operating position. DESCRIPTION OF SYMBOLS 1... First pulley, 2... Second pulley, 3... Link member, 4... Link drive mechanism, 5... Control cable,
6... Root stopper, 7... Rotating pin, 8... Rotating pin, 9... Rotating pin, 10... Device of the present invention,
11...Inner panel, 12...Outer panel, 13
. . . Hinge fitting, 14 . . . Arm member, 15 . . . ...Strut, 21... Storage rope attached to the inner panel, 22... Pulley on the inner panel, 2
3... Pulley on pillar, 24... Driving winch for storage cable, 25... Starting tube, 26... Flap, 27
...hull, 28...overhanging part.

Claims (1)

[Claims] 1. In a marine ramp equipped with two approximately rectangular flat panels having approximately the same width and whose respective short sides are rotatably connected via a hinge metal fitting, one of the panels is installed at a position adjacent to the hinge metal fitting. a first pulley attached to a position adjacent to the tip of an arm member of a predetermined length that is attached to the upper side edge portion of the panel and extends beyond the upper part of the hinge fitting to the top of the other panel; a second pulley attached to a side edge portion of the other panel at a distance;
A device for controlling the angle between both panels, consisting of a control cable that is hung on both pulleys, one end of which is fixed at an appropriate position such as adjacent to one of the pulleys, and the other end is connected to a drive source. At one end, the first
A link member on which a pulley is mounted and the opposite end is rotatably attached to the tip of the arm member, and one end is rotatable to the middle part of the length of the arm member and the opposite end is rotatable to the middle part of the length of the link member. An inter-panel angle control device for a marine ramp, characterized by comprising a freely connected link drive mechanism.