JP2015193307A - hook device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook device which prevents bending caused by a lateral load while securing the workability.SOLUTION: A hook device 100 is used to connect a suspending object 2 to a tip of a wire rope 1 and includes: a hook part 3 provided at the tip of the wire rope 1; a hook receiving part 10 which stores the hook part 3; a base 20 provided at the suspending object 2; and a tiltable part 30 which tiltably connects the hook receiving part 10 with the base 20.

Description

  The present invention relates to a hook device.

  Patent Document 1 includes a dome that is fixed to a work boat and a hook that is fixed to a wire rope by a fixing bracket and is tiltably accommodated in the dome, and the hook has a substantially spherical convex surface. The dome has a substantially spherical concave surface, a hook locking window through which the hook cannot pass and the wire rope enters, a hook passing window through which the hook can pass, and a hook locking window through which the wire rope can pass. And a rope passage window connecting the hook passage window and the hook passage window.

Japanese Patent Laid-Open No. 2005-212534

  In the hook device disclosed in Patent Document 1, since the outer diameter of the hook fixing bracket is formed smaller than the inner diameter of the hook locking window of the dome and a predetermined gap is secured, the hook is predetermined with respect to the dome. Can tilt at an angle. For this reason, even when a load is applied from the side in the suspending direction in the suspended state, the hook can be tilted with respect to the dome by the gap to prevent the hook device from being bent.

  However, in the hook device disclosed in Patent Document 1, in order to prevent bending that occurs when the hook is tilted beyond a predetermined angle with respect to the dome, the hook locking window is made larger in inner diameter with respect to the hook fixing bracket. It is necessary to increase the gap and increase the angle at which the hook tilts with respect to the dome. When the inner diameter of the hook locking window is increased, the contact area between the dome and the hook is decreased, and the locking strength may be reduced. In order to secure the contact area between the hook and the dome, it is conceivable to enlarge the hook or dome. However, when the hook or dome is enlarged, the detachability may be reduced.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a hook device capable of preventing bending due to a lateral load while ensuring workability.

  The present invention is a hook device for connecting a suspended object to the tip of a wire rope, a hook part provided at the tip of the wire rope, a hook receiving part for accommodating the hook part, and the suspended object And a tilting part that tiltably connects the hook receiving part and the base.

  According to the present invention, even when a large lateral load is applied in a state where the suspended object is suspended from the wire rope, the hook receiving portion is tilted with respect to the suspended object by the tilting portion. Bending due to can be prevented. Moreover, it is not necessary to enlarge a hook part and a hook receiving part by providing a tilting part. Thus, since the hook receiving portion can be tilted with respect to the suspended object without increasing the size of the hook portion or the hook receiving portion, it is possible to prevent bending due to a lateral load while ensuring workability.

It is a front view of the hook device concerning the embodiment of the present invention, and shows a part in section. It is a right view of the hook apparatus which concerns on embodiment of this invention. It is a front view of the hook device concerning the embodiment of the present invention, and shows the state where the hook part and the hook receiving part are not connected. It is a front view of a hook device concerning an embodiment of the present invention, and shows a state where a hook part and a hook receiving part connected, and a hook receiving part moved to the upper part of the approximately perpendicular direction. It is the figure which showed a part of front view of the hook apparatus which concerns on embodiment of this invention in the cross section, and is a figure which shows the state which the lateral load acted on the hook apparatus in the suspended state.

  Embodiments of the present invention will be described below with reference to the drawings.

  The hook device is used for a so-called slinging operation for connecting a suspended object to the tip of a wire rope. In the following embodiment, a case will be described in which the hook device is a hook device 100 used in a boat raising device that raises and lowers a work boat from a mother ship.

  First, the configuration of the hook device 100 according to the embodiment of the present invention will be described.

  The hook device 100 is a device for connecting the work boat 2 as a suspended object to the tip of the wire rope 1.

  As shown in FIG. 1, the hook device 100 includes a hook portion 3 provided at the tip of the wire rope 1, a hook receiving portion 10 that accommodates the hook portion 3, a base 20 that is attached to the work boat 2, and a hook receiver. A tilting portion 30 that connects the portion 10 and the base 20 so as to be tiltable.

  The hook part 3 is formed as a shaft part 3A into which the wire rope 1 is inserted and a disk-like member having an outer diameter larger than the outer diameter of the shaft part 3A, and a spherical surface having a spherical (hemispherical) outer peripheral surface at the top. Part 3B. The hook portion 3 is fixed to the wire rope 1 by the shaft portion 3 </ b> A being crimped to the wire rope 1.

  The hook receiving part 10 includes a receiving part 11 that is formed as a hollow dome-shaped member and accommodates the hook part 3, and a base 15 on which the receiving part 11 is placed.

  In the receiving portion 11, a curved portion 12 along the spherical surface of the spherical portion 3B in the hook portion 3 is formed on the inner side, and a flange 11A provided on the outer periphery is connected to the pedestal 15 by a bolt (not shown). A predetermined gap is formed between the top portion of the receiving portion 11 and the shaft portion 3 </ b> A of the hook portion 3, and an opening portion 13 having a size through which the spherical surface portion 3 </ b> B of the hook portion 3 cannot pass is provided. By forming a predetermined gap between the opening 13 and the shaft part 3A of the hook part 3, the hook part 3 and the hook receiving part 10 can be tilted by the gap. Further, a passage port 14 through which the shaft portion 3A and the spherical portion 3B of the hook portion 3 can pass is provided on the side portion of the receiving portion 11 (see FIG. 2). In the passage port 14, the upper portion 14 </ b> A of the passage port 14 through which the shaft portion 3 </ b> A passes is communicated with the opening portion 13, and the spherical surface portion 3 </ b> B is formed in a shape that cannot pass. For this reason, the hook portion 3 provided at the tip of the wire rope 1 can be accommodated in the receiving portion 11 through the passage port 14, and the hook portion 3 and the hook receiving portion are moved by moving the hook portion 3 upward. 10 can be connected.

  The hook receiving part 10 includes a removal prevention device 40 that prevents the hook part 3 accommodated in the hook receiving part 10 from slipping out to the outside, and a guide base 50 provided facing the lower end of the passage port 14 of the receiving part 11. Have.

  The stopper 40 has a substantially elliptical cross-section stopper 41 provided inside the receiving portion 11, a rotation shaft 42 provided through the receiving portion 11 of the hook receiving portion 10 and through which the stopper 41 is inserted, and a rotating shaft 42. Handles 43 (see FIG. 2) provided at both ends of the moving shaft 42 and springs (not shown) that urge the stopper 41 to be in an upright state. When the stopper 41 is biased by a spring and rotates around the rotation shaft 42 to be in an upright state, a part of the opening portion of the passage port 14 formed in the receiving portion 11 is closed, and the hook portion 3 is hooked. The exit from the portion 10 is prevented. In addition, since the stopper 41 can be tilted against the urging force of the spring via the rotation shaft 42 by turning the handle 43, the passage opening 14 is opened and the hook portion 3 is extracted from the hook receiving portion 10. Can do.

  The pedestal 15 includes a flat plate portion 16 connected to the flange 11 </ b> A of the receiving portion 11 via a bolt, and a first connection portion 17 that protrudes from the center of the lower surface of the flat plate portion 16 and is connected to the tilting portion 30. And having. The first connecting portion 17 is formed with an accommodation hole 17A for accommodating a spherical bearing 32 of the tilting portion 30 described later.

  The base 20 has a base portion 21 connected to the work boat 2 and a second connecting portion 22 as a support portion provided on the base portion 21 and connected to the tilting portion 30.

  The second connecting portion 22 is formed as two plate members that are erected from the base portion 21 and are provided substantially parallel to each other with a predetermined interval therebetween. The upper end surface of the 2nd connection part 22 is formed so that it may become flat. Each of the second connecting portions 22 is formed with a long hole 22 </ b> A that extends through a connecting shaft 31 of the tilting portion 30 described later and extends in a substantially vertical direction.

  The tilting portion 30 includes a connecting shaft 31 that passes through each elongated hole 22A in the second connecting portion 22 and a spherical bearing 32 that is received in the receiving hole 17A in the first connecting portion 17 of the hook receiving portion 10 and through which the connecting shaft 31 passes. And comprising.

  Since the connecting shaft 31 is inserted through each of the long holes 22A in the second connecting portion 22, the connecting shaft 31 can move in a substantially vertical direction along the long holes 22A. For this reason, the entire tilting part 30 can move in the substantially vertical direction with respect to the base 20 together with the hook receiving part 10. The tilting part 30 can move downward in the substantially vertical direction together with the hook receiving part 10 until the hook receiving part 10 is placed on the upper end of the second connecting part 22 of the base 20 (see FIG. 3). ). Further, as shown in FIG. 1, the tilting part 30 moves upward in the substantially vertical direction together with the hook receiving part 10 until the connecting shaft 31 of the tilting part 30 contacts the upper end of the long hole 22A of the second connecting part 22. Can move. When the tilting portion 30 moves upward in the substantially vertical direction, a gap is provided between the flat plate portion 16 of the hook receiving portion 10 and the upper end of the second connecting portion 22.

  A retaining plate 31 </ b> A having an outer diameter larger than the width of the long hole 22 </ b> A of the second connecting portion 22 is attached to both ends of the connecting shaft 31 from the outside of the second connecting portion 22. For this reason, even if the connecting shaft 31 receives an axial load, the connecting shaft 31 is prevented from moving in the axial direction and coming off from the elongated hole 22A in the second connecting portion 22. Further, the retaining plate 31A prevents the connecting shaft 31 from being inclined with respect to the horizontal plane, and the connecting shaft 31 can move up and down substantially in parallel in the elongated hole 22A.

  The spherical bearing 32 includes an inner ring 33 through which the connecting shaft 31 is inserted, and an outer ring 34 that is received in the receiving hole 17 </ b> A of the first connecting portion 17 and connected to the first connecting portion 17. In the spherical bearing 32, the outer peripheral surface of the inner ring 33 is formed into a convex spherical surface, the inner peripheral surface of the outer ring 34 is formed into a concave spherical surface along the outer peripheral surface of the inner ring 33, and the inner ring 33 and the outer ring 34 slide. It is a sliding bearing. The spherical bearing 32 may be a spherical bearing by rolling.

  When the outer peripheral surface of the inner ring 33 and the inner peripheral surface of the outer ring 34 that are formed in a spherical shape are in contact with each other and slide, the inner ring 33 and the outer ring 34 of the spherical bearing 32 are around the central axis (in the direction of the solid arrow in FIG. 1). And can be tilted around a horizontal axis (in the direction of a broken line arrow in FIG. 1) substantially orthogonal to the central axis. Further, the inner ring 33 and the outer ring 34 of the spherical bearing 32 can also rotate relative to each other around a substantially vertical axis (in the direction of the dashed line arrow in FIG. 1). Therefore, the hook receiving portion 10 on the outer ring 34 side and the base 20 on the inner ring 33 side can be tilted with respect to each other about three axes of two substantially horizontal axes and a substantially vertical axis. In this way, the tilting part 30 connects the hook receiving part 10 and the base 20 so as to be tiltable.

  A collar member 35 is provided between the inner ring 33 of the spherical bearing 32 and the second connecting portion 22. The collar member 35 restricts the movement of the spherical bearing 32 along the axial direction.

  Further, as shown in FIG. 3, the hook device 100 guides the guide pin 60 and the guide pin 60 provided on the hook receiving portion 10 so as to extend in a substantially horizontal and vertical direction with respect to the connecting shaft 31 of the tilting portion 30. And a guide portion 61 provided to stand on the base portion 21 of the base 20 with a guide groove 62.

  The guide pins 60 are respectively provided on both side surfaces of the first connecting portion 17 in the hook receiving portion 10 as cylindrical pins extending in a substantially horizontal and vertical direction with respect to the connecting shaft 31 of the tilting portion 30.

  The guide portion 61 is provided on the base portion 21 of the base 20 as a pair of plate members provided substantially parallel to each other. The guide portion 61 has a guide groove 62 that is formed as a V-shaped groove and guides the guide pin 60. An accommodation recess 63 for accommodating the guide pin 60 is formed at the bottom of the guide groove 62. The guide pin 60 is received in the receiving recess 63 of the guide groove 62 in a state where the hook receiving portion 10 is placed on the second connecting portion 22 of the base portion 21. The guide groove 62 and the accommodating recess 63 can be formed in any shape as long as the guide pin 60 is accommodated in the accommodating recess 63 in a state where the hook receiving portion 10 is placed on the second connecting portion 22. .

  By providing the guide pin 60 and the guide portion 61 as described above, the hook receiving portion 10 is moved downward in the substantially vertical direction together with the tilting portion 30 from a position where the hook receiving portion 10 can rotate with respect to the base portion 20 via the spherical bearing 32. When moved, the guide pin 60 is guided in the guide groove 62, whereby the angle of the hook receiving portion 10 with respect to the base 20 can be positioned.

  Next, a method for connecting and hanging the hook device 100 will be described.

  In a state where the hook portion 3 and the hook receiving portion 10 are not connected, the hook receiving portion 10 is placed on the second connecting portion 22 of the base 20 as shown in FIG.

  When the hook portion 3 and the hook receiving portion 10 are connected, the hook portion 3 is placed on the guide base 50 of the hook receiving portion 10. Thereafter, the hook part 3 is moved horizontally on the guide base 50 and the stopper part 41 is tilted against the urging force of the spring as shown in FIG. Housed inside.

  The hook receiving portion 10 is placed on the second connecting portion 22 whose upper end is formed flat. For this reason, the hook receiving part 10 does not tilt with respect to the base 20 by the tilting part 30, and the attitude | position of the hook receiving part 10 can be stabilized. For this reason, the hook part 3 can be easily accommodated in the hook receiving part 10.

  When the hook portion 3 is housed in the hook receiving portion 10 and the wire rope 1 is wound and the hook portion 3 is pulled upward, the spherical portion 3B of the hook portion 3 and the curved portion in the receiving portion 11 of the hook receiving portion 10 are obtained. The hook part 3 and the hook receiving part 10 are connected by contact with the part 12.

  When the hook portion 3 accommodated in the hook receiving portion 10 moves upward, the stopper 41 is raised by the urging force of the spring and closes the opening portion of the passage opening 14, so that the hook portion 3 may come out of the hook receiving portion 10. Is prevented (see FIG. 2).

  When the wire rope 1 is further wound and the hook portion 3 is pulled upward, the hook receiving portion 10 placed on the second connecting portion 22 of the base 20 is lifted as shown in FIG. A gap is generated between the lower surface of the pedestal 15 and the upper surface of the second connecting portion 22.

  After the hook receiving part 10 moves upward until the connecting shaft 31 of the tilting part 30 comes into contact with the upper end of the elongated hole 22A in the second connecting part 22 of the base 20, the wire rope 1 is further wound to work. The boat 2 can be suspended from the wire rope 1.

  In general, when the work boat is tilted in a state where the work boat is suspended, the hook portion and the hook receiving portion may tilt, and the shaft portion of the hook portion may come into contact with the hook receiving portion. For this reason, there exists a possibility that a hook apparatus may bend by the big load from the side of a hanging direction.

  On the other hand, according to the hook device 100, as shown by an arrow in FIG. 5, even if a load is applied from the side in the hanging direction, the hook receiving portion 10 and the work boat 2 are tilted by the tilting portion 30. . In this way, when the hook receiving portion 10 and the work boat 2 are tilted, tilting between the hook portion 3 and the hook receiving portion 10 is suppressed by a lateral load, and the shaft portion 3A of the hook portion 3 and the hook receiving portion 10 are Contact with the opening 13 in the receiving part 11 is prevented. Therefore, bending of the hook device 100 can be prevented. At this time, since a gap is provided between the flat plate portion 16 of the hook receiving portion 10 and the second connecting portion 22 of the base 20, the base 15 of the hook receiving portion 10 and the second connecting portion of the base 20 are provided. No contact is made with each other and the mutual tilting is not prevented.

  When releasing the connection between the hook portion 3 and the hook receiving portion 10, the wire rope 1 is unwound and the hook receiving portion 10 is placed on the second connecting portion 22 of the base 20, and the wire rope 1 is tensioned. Leave in a relaxed state that is not working.

  From this state, the handle 43 of the disconnection preventing device 40 is turned to bring the stopper 41 into a collapsed state, and the passage port 14 in the receiving portion 11 is opened. By doing in this way, the hook part 3 accommodated in the inside of the hook receiving part 10 can be removed through the passage port 14.

  According to the above embodiment, there exist the effects shown below.

  In the hook device 100, even when a large lateral load is applied in a state where the work boat 2 is suspended on the wire rope 1, the hook receiving portion 10 is tilted with respect to the work boat 2 by the tilting portion 30, Bending due to lateral load can be prevented. Further, since the tilting portion 30 is provided, it is not necessary to increase the size of the hook portion 3 and the hook receiving portion 10. Thus, since the hook receiving part 10 can be tilted with respect to the work boat 2 without increasing the size of the hook part 3 or the hook receiving part 10, it is possible to prevent bending due to a lateral load while ensuring workability. Can do.

  In particular, in a boat raising device that raises and lowers the work boat 2 with respect to the sea, a load from the side tends to act on the suspension direction due to waves during takeoff and landing, and hook connection work is required on the sea that is shaking. Therefore, workability of hook connecting work is also required. Even in such a case, according to the hook device 100 for connecting the work boat 2 to the tip of the wire rope 1 in the boat raising apparatus, the hook receiver 3 and the hook receiver 10 are not enlarged. Since the portion 10 can be tilted with respect to the work boat 2, the hook can be easily connected at sea, and bending caused by a lateral load caused by waves or the like can be prevented.

  Further, the tilting portion 30 is connected to the base 20 so as to be movable along a substantially vertical direction, and in a state where the work boat 2 is suspended, the flat plate portion 16 of the hook receiving portion 10 and the second of the base 20 are provided. Since a gap is provided between the connecting part 22 and the tilting part 30, the hook receiving part 10 and the work boat 2 can be tilted. When the work boat 2 is not suspended, the hook receiving portion 10 is placed on the second connecting portion 22 of the base 20 and the posture of the hook receiving portion 10 is stabilized. The operation | work which accommodates the part 3 can be performed easily.

  Further, by providing the guide pin 60 and the guide portion 61, the hook receiving portion 10 moves downward in the substantially vertical direction together with the tilting portion 30 from a position where the hook receiving portion 10 can rotate with respect to the base portion 20 via the spherical bearing 32. At this time, the guide pin 60 is guided in the guide groove 62, whereby the angle of the hook receiving portion 10 with respect to the base 20 can be positioned.

  In the above-described embodiment, the hook device 100 used in the boat raising device that raises and lowers the work boat 2 from the mother boat has been described. The hook device 100 according to the present invention is not limited to this, and may be for hanging other suspended objects.

  In the above embodiment, in the hook device 100, the hook portion 3 has the spherical portion 3 </ b> B whose upper outer peripheral surface is formed in a spherical shape, and the hook receiving portion 10 is along the spherical surface of the spherical portion 3 </ b> B in the hook portion 3. The curved portion 12 is formed as a so-called ball hook formed inside. In the case of the hook device 100 used in a boating device that requires work at sea, a ball hook is preferable from the viewpoint of workability, but the hook device 100 has other hook structures. May be.

  Moreover, in the said embodiment, the tilting part 30 of the hook apparatus 100 has the connection shaft 31 connected with the base 20, and the spherical bearing 32 which connects with the hook receiving part 10 and the connection shaft 31 penetrates. there were. The tilting portion 30 may be anything that connects the hook receiving portion 10 and the base 20 so as to be tiltable.

  The tilting unit 30 may include, for example, a universal joint having two axes that are substantially orthogonal to each other and rotatably provided. The two members connected by the universal joint can rotate around the two axes, so that the hook receiving portion 10 and the work boat 2 can be tilted about two axes orthogonal to each other. In this case, a slide mechanism for moving the tilting portion 30 in a substantially vertical direction may be further provided. Thus, even if the tilting part 30 has a universal joint, the same effects as in the above embodiment can be obtained.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

100 hook device 1 wire rope 2 work boat (suspended object)
DESCRIPTION OF SYMBOLS 3 Hook part 3B Spherical surface part 10 Hook receiving part 11 Receiving part 12 Curved part 13 Opening part 15 Base 16 Flat plate part 17 First connection part 20 Base 21 Base part 22 Second connection part (support part)
22A long hole 30 tilting part 31 connecting shaft 32 spherical bearing 60 guide pin 61 guide part 62 guide groove

Claims (6)

A hook device for connecting a suspended object to the tip of a wire rope,
A hook provided at the tip of the wire rope;
A hook receiving portion for accommodating the hook portion;
A base provided on the suspension;
A hook device comprising: a tilting portion that tiltably connects the hook receiving portion and the base. The tilting part is
A connecting shaft connected to the base;
The hook device according to claim 1, further comprising a spherical bearing connected to the hook receiving portion and through which the connecting shaft is inserted. The tilting part is connected to the base so as to be movable along a vertical direction,
In a state where the suspended object is suspended from the wire rope, a gap is provided between the hook receiving portion and the base, and the suspended object is not suspended from the wire rope. The hook device according to claim 1, wherein the hook receiving portion is placed on the base. The base is
A base attached to the suspension;
A support portion provided in the base portion and formed with a long hole extending in the vertical direction;
The hook device according to claim 3, wherein the tilting part has a connecting shaft that passes through the elongated hole of the support part and is provided to be movable along a vertical direction. A guide pin extending perpendicularly to the vertical direction and provided on the hook receiving portion;
A guide portion provided on the base with a guide groove for guiding the guide pin;
The tilting portion is positioned with respect to the base by guiding the guide pin to the guide groove of the guide portion as the tilting portion moves downward in the vertical direction. The hook device according to claim 3 or 4. The hook portion includes a spherical portion having a spherical outer peripheral surface,
The hook receiving portion is formed on the inside with a curved portion along the spherical surface portion of the hook portion,
The hook device according to any one of claims 1 to 5, wherein the hook portion and the hook receiving portion are tiltably coupled.

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