JP2007015411A - Floating body connecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floating body connecting structure using a universal joint not transmitting a moment even to swings as well in the directions up and down and to the left and right as in the rolling direction, ensuring a wide degree of freedom for displacement, and capable of maintaining the durability for a long period of time. <P>SOLUTION: The connecting structure for mooring a floating body floating on a sea to a quay wall or connecting floating bodies together using the universal joint is configured so that the base end of one of the yokes of the universal joint is attached fast to the floating body or the quay wall and a rotating shaft extending in the connecting direction is installed protrusively behind the base end of the other yoke and mounted on the outer surface of the floating body or the quay wall rotatably through a flange, whereby the moment due to swinging of the floating body round the protruded rotating shaft is precluded from being transmitted to the member to be connected owing to rotation of the yokes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a floating body connection structure for mooring a floating body floating on the sea to a quay or connecting floating bodies together.

  Conventionally, a connection structure of floating bodies is disclosed in Patent Document 1. This technique uses a ball joint as a chain joint provided between opposing floating bodies. Since the ball joint has no axial direction of rotation, it has the effect of flexibly responding to the swinging of the floating body due to waves in the sea area.

  By the way, since the mass of the floating body is large, the sphere at the center used when the connection by the ball joint is performed is inevitably enlarged to withstand the load. Large spheres are difficult to manufacture and require high accuracy and high cost, and it is also difficult to attach a sliding body that slides along the surface of the sphere. In addition, there is a problem of polluting the ocean because it is necessary to periodically supply oil for smooth rotation.

  On the other hand, Patent Documents 2 to 4 disclose floating body connection techniques using universal joints (universal shaft joints). Universal joints can be manufactured easily and accurately with a lathe or other processing machine, are easy to assemble and install, can be implemented at low cost, and do not pollute the ocean because there is no need for refueling. is there.

However, these technologies respond to swinging in the vertical and horizontal directions because the base end of the universal joint yoke is fixed to the floating body and quay, but not to swinging in the roll direction. The moment is transmitted to the connection destination, and there is a problem that the durability is lowered due to the load acting on the fixed portion due to repeated waves.
JP 2003-191888 A Japanese Utility Model Publication No. 6-10219 Japanese Utility Model Publication No. 6-34235 Japanese Patent No. 2923174

  The problem to be solved by the present invention is to solve these conventional problems, transmit moments not only in the vertical and horizontal directions but also in the roll direction, and have a high degree of freedom in displacement and durability. The object of the present invention is to provide a connecting structure for floating bodies that can be maintained for a long time.

The configuration of the present invention that solves this problem is as follows.
1) In a connection structure in which a floating body levitated on the sea is moored to a quay with a universal joint or the floating bodies are connected to each other, the base end of one yoke of the universal joint is fixed to the floating body or the quay and the base end of the other yoke A rotating shaft extending backward in the connecting direction is projected, and the rotating shaft is rotatably mounted on the outer surface of the floating body or quay with a mounting flange, and the moment caused by the swinging of the floating body around the projected rotating shaft is caused by the rotation of the yoke. Floating body connection structure characterized in that it is not transmitted to the connection destination 2) In the connection structure where floating bodies levitating on the sea are moored to the quay with a universal joint or floating bodies are connected to each other, the base end of one yoke of the universal joint The part is fixed to the floating body or the quay, and a rotating shaft extending in the connecting direction is provided behind the base end of the other yoke, and the rotating shaft is attached to the floating body or the quay. Floating body connection structure 3 characterized in that the moment caused by the swinging of the floating body around the projecting rotating shaft is not transmitted to the connection destination by the rotation of the yoke. ) A cross pin that supports the yokes of the universal joints is inserted into a hollow body with shaft holes in the vertical and horizontal directions so that the pins can rotate independently around the pin, and a sphere is placed in the center of the body. The structure according to 1) or 2), wherein the joint is configured such that the shaft end face of each pin inserted into the same spherical body is in contact with the shaft, and the yoke is pivotally supported by each protruding pin. Floating body connection structure 4) Cross pins that support the yokes of the universal joints are independent of each other, with a hollow body with shaft holes in the vertical and horizontal directions and pins with flanges on the shaft heads. Floating body connection structure according to 1) or 2), wherein a joint is formed by axially supporting the yokes with the flanges of the protruding pins and constituting a joint 5) The body of the cross pin Floating body connection structure described in 3) or 4) above in which an oil-free bearing or a noise-free bearing is interposed between the shaft hole and the pin 6) The universal joint has a bridge member disposed between the opposing yokes, and the bridge The floating body connection structure according to any one of 1) to 5), wherein both end portions of the member are pivotally supported with the tip portions of the respective yokes so as to be bent at two positions.

  According to the present invention, when the floating body swings in the roll direction due to waves, the movable side yoke of the universal joint rotates around the rotation axis at the mounting portion, and the transmission of the moment to the connection destination is interrupted, and the joint mounting Durability is maintained for a long time without load acting on the part.

  The universal joint of the present invention can be attached by a method in which the rotary shaft of the yoke is rotatably attached to the outer surface of the floating body or quay by a mounting flange, or the rotary shaft of the yoke can be rotated by being inserted into a shaft hole formed in the floating body or the quay. There is a method of attaching to, and is arbitrarily selected. Mooring to the quay is made through a mooring arm, and a similar universal joint is attached to the end of the mooring arm to connect the floating body and the quay with two or three points.

  A cross pin that supports the yokes of a universal joint is a hollow body with shaft holes in the top, bottom, left, and right directions. Thus, a connection structure that can sufficiently withstand a large load without damaging the cross pin can be obtained.

  Further, the cross pin can be held with a simple structure in which the four cross pins are inserted so as to press against the center sphere, and can be pressed by the end cap of the cross pin. Since the cross pin in this case may be a pin having a uniform diameter, the number of manufacturing steps can be reduced, and the merit can be further increased when an inexpensive sphere of mass production is used. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 to 5 is an example in which a rotation shaft of a universal joint yoke is rotatably attached to an outer surface of a floating body with a mounting flange. FIG. 1 is a partially cutaway perspective view of the universal joint of the first embodiment, FIG. 2 is an exploded perspective view of the universal joint of the second embodiment, and FIG. 3 is an explanatory view showing the mooring of the floating body and the connection between the floating bodies of the first embodiment. FIG. 4 is an external view of the universal joint according to the first embodiment, and FIG. 5 is an explanatory view showing attachment of the yoke according to the first embodiment.

  In the figure, 1 is a universal joint, 2 is a movable yoke, 2a is a rotating shaft, 2b is a pin hole, 3 is a fixed yoke, 3a is a pin hole, 4 is a cross pin, 4a is a cross pin body, 4b is a shaft hole, and 4c is a pin 4d is a sphere, 4e is an end cap, 5 is a mounting flange, 5a is a mounting bolt, 6 is a thrust bearing, 7 is a radial bearing, 8 is a shaft flange, A is a mooring arm, F is a floating body, G is a quay, W Is the sea.

  As shown in FIGS. 1 and 2, the universal joint 1 according to the first embodiment has a movable yoke 2 having a rotating shaft 2a extending in the connecting direction behind the base end portion and a fixed yoke 3 disposed opposite to each other via a cross pin body 4a. The independent pin 4c is inserted into the hole 4b of the cross pin body 4a together with the sphere 4d through the pin hole 2b of the movable yoke 2 and the pin hole 3a of the fixed yoke 3, and the pin holes 2b and 3a are sealed with the end cap 4e. It is composed.

  As shown in FIGS. 3 and 4, the fixed yoke 3 of the universal joint 1 is fixed to the outer surface of one floating body F via a mounting plate 9, and a thrust bearing 6 and a radial are mounted on the rotating shaft 2 a of the movable yoke 2 on the opposite side. The bearing 7 is fitted and the shaft-fixing flange 8 is axially attached via the attachment flange 5, and the attachment flange 5 is fixed to the outer surface of the other floating body F via the attachment plate 9. The floating body F adjacent to the quay G is moored via a mooring arm A to which the universal joint 1 is attached on the quay G side.

  In addition, although the thrust bearing 6 and the radial bearing 7 are generally made of metal, a resin-based sliding material may be used. Since the resin-based sliding material has low rigidity as compared with a metal bearing, the impact force caused by the swinging of the floating body F can be effectively reduced. Further, biasing means such as a spring can be employed.

  4A shows the appearance of a universal joint that connects the floating bodies F together, and FIG. 4B shows the appearance of the universal joint that connects the floating body F and the mooring arm A. FIG. FIG. 5 shows examples of the arrangement of thrust bearings. FIG. 5A shows an example in which the thrust bearing 6 is disposed so as to sandwich the shaft-stop flange 8 pivotally attached to the rear end of the rotary shaft 2a. FIG. 5B is an example in which the thrust bearing 6 is arranged so that the mounting flange 5 is sandwiched from the front and the rear on the rear surface of the movable yoke 2 and the front surface of the shaft flange 8.

  Since the first embodiment is configured as described above, when the floating body F swings in the roll direction due to the waves, the movable yoke 2 of the universal joint 1 rotates around the rotation axis at the mounting portion and is adjacent to the floating body F or the mooring arm A. Alternatively, the transmission of the moment to the quay G was interrupted, and the durability was maintained for a long time without any load acting on the joint mounting portion. In addition, since the pin 4c of the cross pin 4 can be rotated independently, the connection structure that can receive the load from the large and large mass floating body F by the independent pin 4c and prevent the cross pin 4 from being damaged and sufficiently withstand the heavy load. And was able to.

  Example 2 shown in FIG. 6 is an example in which a rotation shaft of a universal joint yoke is rotatably inserted by being inserted into a shaft hole formed in a floating body or a quay. FIG. 6 is an explanatory view showing attachment of the yoke according to the second embodiment. The universal joint 1 of the second embodiment has the same structure as that of the first embodiment, but is rotatably mounted by inserting the rotating shaft 2a of the movable yoke 2 into the shaft hole 10 formed in the floating body F.

  FIG. 6A is an example in which the thrust bearing 6 is disposed so that the reduced diameter portion of the shaft hole 10 is sandwiched from the front and the rear on the rear surface of the movable yoke 2 and the front surface of the shaft locking flange 8. FIG. 6B is an example in which the thrust bearing 6 is arranged so as to sandwich the enlarged diameter portion of the shaft flange 8 disposed forward from the front and rear. Thus, by incorporating the movable yoke 2 into the floating body F, it is possible to make the thrust bearing 6 have a large structure capable of withstanding a heavy load as compared with the first embodiment. Other reference numerals and configurations are the same as those in the first embodiment.

  Example 3 shown in FIG. 7 is an example of a cross pin in which a sphere is omitted. FIG. 7 is a cross-sectional view of the cross pin of the third embodiment. In the figure, 4f is a flange, 4g is a sliding member, and 4h is a mounting bolt.

  In the cross pin 4 shown in FIG. 7, the movable yoke 2 and the fixed yoke 3 are respectively connected to the pin holes 2b and 3a and the shaft holes 4b via the sliding material 4g made of an oil-free bearing or a noiseless bearing in each shaft hole 4b. Are arranged so as to communicate with each other, and pins 4c having flanges 4f at the shaft heads are respectively inserted into the shafts, and the flanges 4f of the respective pins 4c, the movable yoke 2 and the fixed yoke 3 are fixed by mounting bolts 4h.

  Therefore, in Embodiment 3, it is necessary to provide the pin 4c with the flange 4f. However, the spherical body 4d disposed at the center of the cross pin body 4a can be omitted, and the structure is simplified. Other reference numerals and configurations are the same as those in the first embodiment.

  Example 4 shown in FIG. 8 is an example using a universal joint having a double structure. 8A and 8B are explanatory views showing attachment of the yoke according to the fourth embodiment, FIG. 8A is a longitudinal sectional view, and FIG. 8B is a transverse sectional view. In the figure, 11 is a bridge member, and 11a is a shaft hole.

  In the universal joint 1 shown in FIG. 8, a bridge member 11 having a shaft hole 11a at both ends of a bifurcated tip is disposed between a movable yoke 2 and a fixed yoke 3, and each is supported by a cross pin 4 shown in the first embodiment. Thus, a double structure joint that can be bent at two locations is formed.

  Therefore, it responds flexibly to larger waves compared to the universal joint 1 bent at one place, and the load acting on the joint mounting portion is reduced as much as possible to maintain the durability for a longer period. be able to. Other reference numerals and configurations are the same as those in the first embodiment.

  The connection structure of floating bodies of the present invention can be widely applied to floating breakwaters, floating piers, barges, sails, artificial islands, and the like.

1 is a partially cutaway perspective view of a universal joint of Example 1. FIG. 1 is an exploded perspective view of a universal joint of Example 1. FIG. It is explanatory drawing which shows the mooring of the floating body of Example 1, and the connection between floating bodies. 1 is an external view of a universal joint of Example 1. FIG. It is explanatory drawing which shows the attachment of the yoke of Example 1. FIG. It is explanatory drawing which shows the attachment of the yoke of Example 2. FIG. 6 is a cross-sectional view of a cross pin of Example 3. FIG. It is explanatory drawing which shows the attachment of the yoke of Example 4. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Universal joint 2 Movable yoke 2a Rotating shaft 2b Pin hole 3 Fixed yoke 3a Pin hole 4 Cross pin 4a Cross pin body 4b Shaft hole 4c Pin 4d Sphere 4e End cap 4f Flange 4g Sliding material 4h Mounting bolt 5 Mounting flange 5a Mounting bolt 6 Thrust Bearing 7 Radial bearing 8 Shaft stop flange 9 Mounting plate 10 Shaft hole 11 Bridge member 11a Shaft hole A Mooring arm F Floating body G Wharf W Sea

Claims (6)

  In a connection structure where a floating body levitating on the sea is moored to a quay with a universal joint or the floating bodies are connected to each other, the base end of one yoke of the universal joint is fixed to the floating body or the quay, and behind the base end of the other yoke A rotating shaft extending in the connecting direction is projected, and the rotating shaft is attached to the outer surface of the floating body or quay with a mounting flange so that the moment caused by the swinging of the floating body around the projecting rotating shaft can be Floating body connection structure characterized by not transmitting to   In a connection structure where a floating body levitating on the sea is moored to a quay with a universal joint or the floating bodies are connected to each other, the base end of one yoke of the universal joint is fixed to the floating body or the quay, and behind the base end of the other yoke A rotating shaft extending in the connecting direction is projected, and the rotating shaft is inserted into a shaft hole formed in the floating body or quay wall so as to be rotatably mounted. The moment caused by the swinging of the floating body around the projected rotating shaft is rotated by the yoke. The floating body connection structure is characterized in that it is not transmitted to the connection destination.   A cross pin that supports the yokes of the universal joints is inserted into a hollow body with shaft holes in the vertical and horizontal directions so that the pins can be rotated independently around the pin, and a sphere is placed in the center of the body. 3. The floating body according to claim 1, wherein a shaft is formed so that a shaft end surface of each pin inserted into the same sphere is in contact with each other, and a yoke is pivotally supported by each protruding pin to form a joint. Linked structure.   Cross pins that support the yokes of the universal joints are inserted into the hollow body with shaft holes in the vertical and horizontal directions, and the pins with flanges on the shaft heads are inserted into the shafts so that they can rotate independently around the pins. The floating body connection structure according to claim 1 or 2, wherein the joint is formed by pivotally supporting yokes with a flange of a pin.   The floating body connection structure according to claim 3 or 4, wherein an oil-free bearing or a noiseless bearing is interposed between the shaft hole of the body of the cross pin and the pin.   6. The universal joint has a structure in which a bridge member is disposed between opposing yokes, and both ends of the bridge member are pivotally supported with the tip of each yoke, respectively, and can be bent at two locations. Or a floating structure connection structure.

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