JP5549003B2 - Drum equipment - Google Patents

Description

        The present invention relates to a winding drum device for ropes and ropes used for mooring aquaculture ginger and for mooring a ship.

        Conventionally, ropes and ropes have been used to connect floating bodies such as aquaculture ginger and ships to the seabed or quay. However, due to changes in the tide level and waves, repeated loads are always applied to the rope, the deterioration is accelerated, and there is a risk of breaking due to suddenly abnormally high tension.

        For this reason, in aquaculture ginger, a floating body or a weight is provided on the rope between the floating body such as the ginger and the anchor, or a buffer member for handling a sudden pull is attached in the middle of the rope. It was. In the case of such a configuration, there is a problem that aquatic organisms such as algae, oysters, barnacles and the like are attached to floating bodies and weights in the underwater part, and the buffer member, and care and maintenance thereof are troublesome. In addition, during the time of storms and typhoons, the floating body is automatically sunk to the bottom of the waves to avoid the effects of rough waves. Japanese Patent Laid-Open No. 6-64582 discloses a floating body anchoring device that can always support a floating body with a rope having the same tension even during typhoons and tidal periods.

        However, although it is recognized that such a device can prevent fatigue failure of the mooring device due to fluctuations in the tension of the rope, the rope adjuster with a built-in piston is placed in the water. For this reason, the attachment of aquatic organisms is unavoidable, and the structure as a whole is very complicated, the installation cost is high, and maintenance takes time.

        On the other hand, with regard to mooring of a ship, a displacement measuring device that constantly measures changes in the position of the moored ship and prevents the ship from being swept away by strong winds and tidal currents is known from Japanese Utility Model Laid-Open No. 1-176593. In this, the cable of the auto tension winder is fixed to the ship side, and the abnormal berthing of the ship is detected while measuring the change of the cable due to the movement of the ship, based on the position of the ship at the start, and moored It is described that the device is wound to keep the ship safe. However, this apparatus has to be provided with a cable tension meter and an auto tension winder, and there is a problem that the structure is complicated because the tension is measured with a dedicated cable for measurement.

        Further, Japanese Patent Application Laid-Open No. 10-109686 discloses a technique for accurately detecting the tension of a mooring line and preventing an accident caused by an abnormal tension of the mooring line. However, the present invention detects and monitors the tension acting on the floating mooring line, and does not show the function of feeding or unwinding the line when the tension is increased or decreased from a predetermined tension. .

JP-A-6-64582 Japanese Utility Model Publication 1-176593 JP-A-10-109686

      The problem to be solved by the present invention is to solve these conventional problems and to have a compact structure capable of automatically winding and feeding the rope according to the tension of the rope wound around the drum. Is to provide a simple drum device.

        The present invention includes a main shaft, a drum that winds a rope supported on the main shaft, a screw shaft formed on a part of the main shaft, and a bush that is screwed to the screw shaft. A sliding hardware held rotatably and reciprocally movable in the axial direction of the main shaft, and a buffer mechanism interposed between the inner surface of the drum and the sliding hardware. Further, the buffer mechanism has a pair of U-shaped metal fittings, each of which is formed by connecting a pair of elongated parallel plate members separated in parallel by a connecting portion at one end thereof, upside down and at 90 ° phase from each other. The space between the metal plate and the connecting portion of the pair of metal fittings fitted to each other so that the parallel plate material of the other metal fitting is inserted into the open side surface of the metal fitting and the other metal fitting is inserted. An elastic member is inserted, and the opposite ends of the connecting portion of the pair of metal fittings are pin-connected to the sliding hardware and the drum, respectively, and the elastic member is parallel to the buffer mechanism by relative displacement in the longitudinal direction of the pair of metal fittings. It was formed to be deformable while in contact with the inner surface of the plate material. Furthermore, the drum device is characterized in that the drum is filled with a lubricant.

The device of the present invention can automatically detect a change in the tension of the rope for mooring or mooring, and can draw out or wind the rope from the drum, and can always hold the rope with a tension near the set value. . Therefore, labor saving can be achieved, and impact load and overload stress do not act on the rope, and the life of the rope can be greatly extended.
Moreover, since it can respond irrespective of the diameter of a rope, it can contribute also to the weight reduction of an apparatus. Further, since the shock absorber is arranged inside the drum, it can be used for a long time without being exposed to wind and rain without deterioration, and there is an effect that maintenance and maintenance work are unnecessary.

      Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side cross-sectional view of a drum device main body. FIG. 2 is an explanatory view showing a state of compression of the rubber ball when tension is applied to the rope. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG.

      As shown in FIG. 1, the drum 1 includes a winding drum 11 and a pair of upper and lower side plates 12. Reference numeral 21 denotes a main shaft of the drum 1 which is held by a bearing 23 of a mounting base 22 erected on the substrate 28. Reference numeral 24 denotes a washer, reference numeral 25 denotes an oil seal bush, and reference numeral 26 denotes a rotation stopper for stopping the rotation of the main shaft 21. A screw shaft 27 is formed on a part of the main shaft 21 inside the drum. 3 is a rope wound around the winding drum 11 of the drum 1. Reference numeral 4 denotes a buffer mechanism, which is configured as follows.

      1 and 2, reference numerals 41 and 42 denote U-shaped metal fittings in which a pair of elongated parallel plate members separated in parallel and extending in parallel as shown in the figure are connected at a connecting portion at one end thereof. 42 are fitted to each other so that the parallel plate material of the other metal fitting 42 is inserted into the released side surface of the one metal fitting 41 by turning them upside down and changing the phase by 90 °. A pair of metal fittings 41, 42 are alternately arranged, and a plurality of hard elastic rubber balls 43 are arranged in series so as to contact each other between the metal fittings 41, 42, and the rubber balls 43 are appropriately compressed by the metal fittings 41, 42. It has become a mechanism. The end portion of the metal fitting 41 is attached to the side plate 12 with a pin 44.

      51 is a sliding hardware, and the end of the metal fitting 42 of the buffer mechanism 4 is pivotally attached by a pin 45. 3 is provided with a roller 53 so as to be slidable in the extending direction of the main shaft 21 along a pair of guide plates 52 projecting from the inside of the winding cavity 11. As shown in FIG. . Reference numeral 54 denotes a bracket for reinforcing the guide plate 52. A bush 55 is screwed into the screw shaft 27 formed at the central portion of the sliding hardware 51.

      The drum device of the present invention configured as described above is mounted and operated as follows. First, the drum apparatus of the present invention is attached via a substrate 28 on aquaculture ginger cage (not shown) or on a quay or ship where a ship is to be moored. Next, the mooring line and the rope 3 suspended on the winding drum 11 are tensioned while rotating the drum 1. At this time, about half of the lubricant is put into the drum 1 so that the screw shaft 27 is immersed therein. In a state where a predetermined tension is maintained on the rope 3, the main shaft 21 is fixed to the mounting base 22 with a rotation stopper 26.

      When tension of a predetermined value abnormality acts on the rope 3 due to a change in tide level or waves, a rotational force acts on the drum 1. Then, since the screw shaft 27 is fixed, the sliding hardware 51 moves to the right in FIG. 1 while rotating by the bush 55 meshing with the screw shaft 27. When the sliding hardware 51 moves to the right while being guided by the guide plate 52, the U-shaped fitting 42 also moves. The U-shaped metal fittings 41 and 42 are fitted to each other so that the parallel plate material of the other metal fitting 42 is inserted into the released side surface of one metal fitting 41 by turning upside down and changing the phase by 90 °. Further, the metal fitting 41 is attached to the side plate 12 with a pin 44, and the end of the metal fitting 42 is pivotally attached to the sliding hardware 51 with a pin 45.

      Therefore, as the sliding hardware 51 moves in the right direction, the rubber balls 43 disposed between the hardware 41 and 42 are compressed and deformed. The elastic member 4 is deformed by an amount corresponding to the tension of the rope 3 and the rope 3 is fed out. When the two are balanced, the payout ends. That is, when a tension of a predetermined value or more acts on the rope 3, the state shown in FIG. 1 is changed to the state shown in FIG. 2, and the drum 1 rotates to feed out the rope 3.

      On the contrary, when the tension of the rope 3 is weakened, the restoring force of the rubber ball 43 is excellent, and the sliding hardware 51 moves to the left in FIG. 2, and the drum 1 is rotated along with this, so that the rope 3 is wound up. . Such a series of tension adjustment, winding and unwinding of the rope 3 are automatically performed.

      In order for the sliding hardware 51 to move smoothly in the right direction and the left direction with the rotation of the drum 1, the twist angle of the screw shaft 27 is preferably set to 45 degrees. The elastic coefficient and displacement amount are set according to the elastic modulus of the rubber ball, the diameter of the rubber ball, the number of rubber balls, the diameter of the screw shaft, the diameter of the winding drum, and the like. Therefore, by selecting and selecting a combination of these optimal devices, it is possible to provide a device that meets the purpose of use. Further, as the lubricant filled in the drum, grease (grease) can be used in addition to the lubricating oil.

Furthermore, although the case where hard elastic rubber material was used as an elastic member was demonstrated here, spring materials, such as various springs, may be used besides this. Although the case where a spherical body such as the hard elastic rubber ball 43 is used has been described here, the invention is not limited to the spherical body, and a cylindrical rubber, a lantern type, a sausage type, or the like can also be used.
Furthermore, if a drive device such as a motor is connected to the main shaft 21 of the present invention and used as a winch, it can also function as an impact mitigation means in the event of a high load at the start of movement or a sudden load change. It can help protect the ropes, cords, and parts that make up the winch.

      According to the present invention, when a larger or smaller tension is applied to the rope 3 with respect to the set load, the drum 1 automatically rotates to adjust the rope 3 by feeding or winding it, and the set load state is always maintained. To maintain. Therefore, it is less troublesome for the operator and contributes to labor saving. Moreover, since an excessive force does not act on the wire or the rope 3, it is hard to be damaged, and durability can be maintained high. Furthermore, since the tension is adjusted by a buffer mechanism formed inside the drum 1, the tension is not exposed to wind and rain, and it lasts longer and does not require maintenance work. In particular, since the drum is filled with lubricating oil, the operation of the sliding member and the screw portion is extremely smooth.

The device of the present invention can be used for mooring a moored ship or aquaculture ginger, and for mooring a floating pier or a floating breakwater. Moreover, if used for mooring to a voyage of a running ferry or a passenger ship, it is extremely economical as compared with a conventional system using a winch with the engine running.
Furthermore, if applied to a winch or hoist as a lifting tool, the movement starts slowly and becomes extremely smooth, so that it has an impact mitigating action and functions as a shock absorber.

Side surface sectional drawing of a drum apparatus main body. Explanatory drawing which shows the mode of compression of the rubber ball when tension | tensile_strength acts on a rope. AA sectional view taken on the line AA of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum 11 Winding drum 12 Side plate 21 Main shaft 22 Mounting base 23 Bearing 24 Washer 25 Bushing 26 Anti-rotation metal fitting 27 Screw shaft 28 Substrate 3 Rope 4 Buffering mechanism 41 U-shaped bracket 42 U-shaped bracket 43 Rubber ball 44 Pin 45 Pin 51 Slide hardware 52 Guide plate 53 Roller 54 Bracket 55 Bush

Claims (3)

A main shaft, a drum that winds a rope supported by the main shaft, a screw shaft that is formed on a part of the main shaft, and a bush that is screwed to the screw shaft. A sliding hardware held so as to be capable of reciprocating in the axial direction of the main shaft, and the rope being fed or wound from the drum interposed between the inner surface of the drum and the sliding hardware , a set value A drum device comprising a buffer mechanism for holding the rope with a tension in the vicinity . The buffer mechanism is a pair of U-shaped metal fittings connected at one end of a pair of long and narrow parallel plates separated in parallel by a fixed amount and turned 90 ° in phase with each other. The other side of the metal fittings are fitted to each other so that the parallel plate material of the other metal fitting is inserted into the open side surface of the one metal fitting, and the space surrounded by the parallel plate material of the pair of metal fittings and the connecting portion is elastic. A member is inserted, and the opposite ends of the connecting portions of the pair of metal fittings are pin-connected to the sliding hardware and the drum, respectively, and the elastic member is parallel plate material of the buffer mechanism by relative displacement in the longitudinal direction of the pair of metal fittings. The drum device according to claim 1, wherein the drum device is deformable while being in contact with an inner surface. The drum device according to claim 1, wherein the rotary drum is filled with a lubricant.

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