JP2006111026A - Telescopic mast device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic mast device capable of being accommodated without constituting an obstacle on the deck of a ship, structured simply, and able to conduct expanding/contracting motions well balanced in the weight. <P>SOLUTION: The mast body 1 is structured so that a stationary mast member 2 in a large diametric cylindrical shape arranged stationarily is fitted with a plurality of moving mast members 3A, 3B, 3C in a small diametric cylindrical shape fitted in one another in sleeve shape so that expansion and contraction can be made on multi-stage system. An elevating/sinking mechanism P to move and retreat the moving mast members 3A, 3B, 3C while they are accommodated one after another in the stationary mast member 2, consists in a rack drive jack mechanism configured so that a pinion 12 installed inside the stationary mast member 2 is meshed with a rack member 11 arranged dangling in such a way that its top is fitted fast in the moving mast member 3C positioned at the uppermost stage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a telescopic mast device that can move up and down a mast installed on a ship deck, for example, in a bridge or the like in a multistage manner.

The height of the navigation light from the draft line position on the mast installed in a large ship is strictly determined according to the size of the ship based on legal regulations. Thus, when the mast itself on which the navigation light is installed is very high, for example, when the mast passes under a structure such as an iron bridge at the time of high tide, the mast collides with the structure. In addition, when a large vessel is pushed out by a small vessel such as a tug boat, the mast of the small vessel hits the hull overhanging portion of the large vessel. Furthermore, if the mast is high, the stability at the time of navigation will be considerably reduced. For this reason, conventionally, there has been provided a tilting mast that tilts the mast horizontally with respect to the ship when not required, and a hydraulic lifting mast that can be lifted and retracted hydraulically.
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  However, in the conventional tilting mast, the tilting device itself constituting it is very large, and when the mast is laid down and stowed, the mast lies on the ship deck and gets in the way. It will be something. In addition, during the raising / lowering operation of the mast, the weight balance of the mast itself is lost and the load is excessively applied in the offset direction, so that the raising / lowering device itself may be damaged. In addition, when using a hydraulic lifting mast, not only does it always require hydraulic pressure to maintain it, but it can also be operated if the hydraulic system fails or the hydraulic piping is damaged. For example, even if it is raised manually, it is very difficult.

  Therefore, the present invention was created in view of the conventional circumstances as described above, and can prevent a mast collision with the structure when the ship passes under the sea bridge or other structure, In small vessels such as tugboats, it is possible to prevent the mast of the small vessel from touching the hull overhanging portion of the large vessel in the operation of pushing out the large vessel, and to improve the stability of the mast during navigation in both the use state and the storage state In addition to being able to do so, it is an object of the present invention to provide a telescopic mast device that does not get in the way on the ship deck and that can perform a telescopic operation that is simple in construction and balanced in weight.

In order to solve the above-described problems, in the present invention, a small-diameter cylindrical shape that is sequentially inserted into a sheath shape so as to be expandable and contractible in a multistage manner on a fixed-diameter cylindrical fixed mast member 2. A mast main body 1 having a plurality of moving mast members 3A, 3B, 3C, and an elevating mechanism P for retracting and moving the moving mast members 3 while sequentially storing them in the fixed mast member 2 are provided.
One elevating mechanism P includes a pinion 12 disposed in the fixed mast member 2 on a rack member 11 that is suspended from the upper ends of the movable mast members 3A, 3B, and 3C that are positioned at the top. It can be based on a rack drive jack mechanism formed by meshing.
The other elevating mechanism P is an outer cylinder member 21 having a top end that is suspended and fitted into the movable mast members 3A, 3B, 3C located at the uppermost stage and having a screw nut member 23 at one end. The screw nut member 23 is screwed with a male screw rod member 22 erected so as to be rotatable by a driving source Q disposed in the fixed mast member 2. .

  In the telescopic mast device according to the present invention configured as described above, the rack member 11 is moved downward as the pinion 12 of the rack drive jack mechanism rotates, and the outer cylinder member 21 is driven by the drive source Q of the screw rotation type jack mechanism. The elevating mechanism P configured by screwing the male screw rod member 22 into the inside through the screw nut member 23 or the like while sequentially storing the movable mast members 3A, 3B, 3C in the fixed mast member 2, respectively. The mast main body 1 itself is retracted to the height position of the fixed mast member 2 at the lowest position so that the mast main body 1 can be retracted and stored.

  According to the present invention, it is possible to prevent the mast from colliding with the structure when the ship passes under the structure, and in the case of a small ship such as a tugboat, the hull of the large ship is pushed out in the operation of pushing out the large ship. The contact of the mast of the small ship with the part can be prevented. Further, when sailing, the expansion and contraction is along the vertical direction, so that the stability of the mast can be improved. The telescopic motion is possible.

  That is, this is because the present invention has a plurality of small-diameter cylindrical moving mast members 3A, 3B that are sequentially fitted in a sheath shape so as to be able to expand and contract in a multistage manner on a fixed-diameter cylindrical fixed mast member 2. , 3C and an elevating mechanism P that retracts and moves the mast members 3A, 3B, 3C while sequentially storing them in the fixed mast member 2, thereby moving the mast member. Each of 3A, 3B, and 3C can be sequentially stored and retracted in the fixed mast member 2 while maintaining the weight balance, and the mast body 1 itself can be easily contracted to the height position of the fixed mast member 2 in the lowest position. it can.

  In one elevating mechanism P, the pinion 12 disposed in the fixed mast member 2 is engaged with the rack member 11 that is suspended by being inserted and fixed at the upper end of the movable mast member 3C located at the uppermost stage. Since the rack drive jack mechanism is configured as described above, the movable mast members 3A, 3B, 3C are kept in the fixed mast member 2 in a weight balance by the downward movement of the rack member 11 as the pinion 12 of the rack drive jack mechanism rotates. However, it can be stored and retracted sequentially.

  In the other raising / lowering mechanism P, the outer cylinder member 21 is configured such that the upper end is fitted and fixed in the moving mast member 3C located at the uppermost stage and is suspended and has a screw nut member 23 at one end. The screw nut member 23 is a screw-rotating jack mechanism in which a male screw rod member 22 is installed so as to be rotatable by a drive source Q disposed in the fixed mast member 2. Each of the moving mast members 3A, 3B, 3C is loaded into the fixed mast member 2 by screwing movement of the male screw rod member 22 through the screw nut member 23 into the outer cylinder member 21 by the drive source Q of the jack type mechanism. The balance can be stored and retracted sequentially. Moreover, since the male screw rod member 22 is screwed into the outer cylinder member 21 so as to cover the male screw rod member 22, the outer cylinder member 21, It is not necessary to provide a blank space for retracting each male screw rod member 22.

  Note that the reference numerals added in the means for solving the above-described problems and the effects of the invention are given for easy reference to the parts showing the components shown in the drawings. The present invention is not limited to the structure / shape indicated by the reference numeral.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the figure is installed on a deck of a large ship or a small ship, for example, on a bridge, etc. It is a mast body made of, for example, an aluminum pipe that constitutes a mast lifting device that can be made. The mast body 1 can be expanded and contracted in a multistage manner by a large-diameter cylindrical fixed mast member 2 fixedly arranged on the bridge and a lifting mechanism P such as a rack drive jack mechanism described later with respect to the fixed mast member 2. And a plurality of small-diameter cylindrical moving mast members 3A, 3B, and 3C that are sequentially fitted in a sheath shape.

  That is, as shown in FIG. 1, a cross beam deck-like base 31 is provided on the left and right side surfaces of the fixed mast member 2, and a work lamp 32, a radar transceiver 33, a flashing signal lamp 34, Each of the beliefs 39 is attached, and the front towlight 35 and the air horn 36 are respectively attached to the intermediate side surface of the fixed mast member 2.

  Further, the moving mast members 3A, 3B, 3C are constituted by, for example, two middle-stage moving mast members 3A, 3B and an uppermost moving mast member 3C, and each of the moving mast members 3A, 3B, 3C The retraction movement is made while sequentially storing in the fixed mast member 2. At this time, a front towing light 35 is installed through a step on the upper side surface of the middle moving mast member 3A located on the lower side, and a mast lamp 37 is installed on the intermediate side surface of the uppermost moving mast member 3C through the step. A berthing light 38 is installed at the upper tip.

  As shown in FIG. 2, the movable mast member 3A located on the lower side of the two middle-stage movable mast members 3A and 3B has a slight clearance of about 0.3 to 0.5 mm, for example, on the outer periphery of the lower end thereof. The fixed mast member 2 is inserted into the fixed mast member 2 through the cylindrical sliding contact member 4 made of, for example, hard nylon and having a small friction coefficient. At this time, in order to prevent the sliding contact member 4 from dropping off from the moving mast member 3A, an annular outward projection 6 is formed on the lower end opening side of the moving mast member 3A toward the outer periphery. An annular inward projection 5 is formed facing the outward projection 6 from the upper end opening side of the fixed mast member 2 toward the outer radial direction, and when the movable mast member 3A is pulled out from the fixed mast member 2. The sliding contact member 4 is sandwiched between the projecting portions 5 and 6. Thus, the moving mast member 3A is locked by the sliding contact member 4 so as not to be detached from the fixed mast member 2.

  Further, an annular outward projection 6 is formed in the outer peripheral direction on the lower end opening side of the moving mast member 3B located on the upper side of the two middle moving mast members 3A, 3B. An annular inward protruding portion 5 is formed in the inner circumferential direction on the upper end opening side of the moving mast member 3A located on the side, and by the engagement of the outward protruding portion 6 and the inward protruding portion 5, 2 Consideration is given so that the upper moving mast member 3B does not come off from the lower moving mast member 3A when the two middle moving mast members 3A, 3B are extended.

  Further, an annular outward projection 6 is formed on the lower end opening side of the moving mast member 3C located at the uppermost stage in the outer circumferential direction, and corresponding to this, of the two middle moving mast members 3A, 3B An annular inward protruding portion 5 is formed in the inner circumferential direction on the upper end opening side of the moving mast member 3B located on the upper side, and the outermost protruding portion 6 and the inward protruding portion 5 are engaged with each other by the engagement thereof. When the upper moving mast member 3C and the upper middle moving mast member 3A are extended, the uppermost moving mast member 3B is prevented from being detached from the upper middle moving mast member 3B. is there.

  One end of a rod-shaped rack member 11 constituting, for example, a rack drive jack mechanism is fitted and fixed as an elevating mechanism P inside the upper end of the moving mast member 3C located at the uppermost stage, and the lower sides of the rack members 11 are mutually connected. The movable mast members 3 </ b> A, 3 </ b> B, 3 </ b> C and the fixed mast member 2 that are in an extended state are suspended from each other. Further, the middle part of the rack member 11 is rotatably held via a cylindrical sliding contact member 4 fitted on the lower end opening side where the outward projection 6 of each moving mast member 3A, 3B, 3C is located. ing. At this time, the sliding contact member 4 provided on the lower end opening side of each of the moving mast member 3C positioned at the uppermost stage and the upper moving mast member 3B at the upper stage has a part thereof on the cylindrical inner peripheral surface below the inward projection 5. It is stepped so that it comes into contact.

  The lower end side of the rack member 11 is meshed with a pinion 12 of a rack drive jack mechanism that is an elevating mechanism P disposed inside the lower casing 7 that communicates with the inside of the fixed mast member 2. The pinion 12 in this rack drive jack mechanism is provided with a stopper mechanism (not shown) so that it can be rotated either manually or automatically through a drive source Q, and can be stopped appropriately at any rotating position.

  Instead of the rack drive jack mechanism described above, a worm gear jack mechanism in which a worm gear is engaged with a bar screw may be used.

  The pinion 12 in the rack drive mechanism is connected to a manual lifting gear, and can be lifted and lowered manually by fitting a manual handle to the manual lifting gear and used as a drive source Q. The electric motor is provided with a brake mechanism, a ratchet type stopper mechanism, etc., and when the mast body 1 is raised, even if a loss such as a power interruption / disappearance or a failure occurs due to any cause, We are careful not to stop and descend.

  In this way, each movable mast member 3A, 3B, 3C itself moves freely with respect to the fixed mast member 2 such as ascending and protruding from the fixed mast member 2 while retreating into the fixed mast member 2 while maintaining the weight balance. For example, when a ship passes under a public structure such as an iron bridge, the moving mast members 3A, 3B, and 3C can be sequentially stored in the fixed mast member 2 when the mast body 1 becomes an obstacle. (See FIG. 3).

  Next, the use operation according to this configuration will be described. As shown in FIG. 2, when the mast body 1 is initially contracted to the minimum from the fully extended state, the rack drive jack of the elevating mechanism P is used. By operating the mechanism and rotating the pinion 12 in the clockwise direction, the rack member 11 engaged with the pinion 12 moves downward. Accordingly, the uppermost moving mast member 3C is first housed in the upper middle moving mast member 3B, and then the upper middle moving mast member 3B is housed in the lower middle moving mast member 3A. Further, the lower middle mast moving mast member 3A is housed in the fixed mast member 2 at the lowest position. As a result, the mast body 1 itself can contract to a position corresponding to the height position of the fixed mast member 2.

  On the other hand, as shown in FIG. 3, when the mast body 1 is extended to the maximum from the contracted state, the rack drive jack mechanism of the elevating mechanism P is operated to move the pinion 12 counterclockwise. When rotated, the rack member 11 meshed with the pinion 12 moves in the upward direction. Accordingly, the lower middle moving mast member 3A is first pushed out from the lowermost fixed mast member 2, and then the upper middle moving mast member from the lower middle moving mast member 3A. 3B is pushed out, and further, the uppermost moving mast member 3C is pushed out from the upper middle moving mast member 3B. Thus, in a state where the mast body 1 is pushed out and extended to the maximum extent, the outward projection 6 and the inward projection 5 are engaged with each other, so that the mast body 1 is straight along the vertical direction. It becomes a stretched state.

  3 to 6 show another embodiment of the mast lifting apparatus according to the present invention. That is, as shown in FIG. 3, the mast body 1 includes a plurality of small-diameter cylindrical moving mast members that are sequentially fitted in a sheath shape with respect to a large-diameter cylindrical fixed mast member 2 fixedly arranged on the bridge. 3 can be expanded and contracted in a multistage manner by an elevating mechanism P using a screw-rotating jack mechanism.

  As shown in FIG. 5, the screw-rotating jack mechanism has a cylindrical outer cylinder member 21 that is non-rotatably fitted and fixed to the inner upper end of the movable mast member 3 </ b> C located at the uppermost stage. The lower side of the outer cylinder member 21 is suspended from the inside of each of the movable mast members 3A, 3B, 3C that are stretched with each other. Further, the middle portion of the outer cylinder member 21 is held via a cylindrical sliding contact member 4 fitted to the lower end opening side where the outward projection 6 of each moving mast member 3A, 3B, 3C is located. . A screw nut member 23 is fixed to the lower end of the outer cylinder member 21 by welding or the like, and the outer periphery of the screw nut member 23 is brought into contact with the inner peripheral surface of the fixed mast member 2 via the cylindrical sliding contact member 4. I'm allowed.

  On the other hand, the male screw rod member 22 having the drive gear 25 on the lower end side is rotatably supported by a bearing structure portion 27 provided in the lower casing 7 that communicates with the inside of the fixed mast member 2. The male screw rod member 22 itself is screwed into the screw nut member 23 at the lower end of the outer cylinder member 21. At this time, a stopper member 24 having an outer diameter slightly larger than the screw hole of the screw nut member 23 is attached to the upper end portion of the male screw rod member 22 so as not to be detached from the screw nut member 23.

  As the bearing structure portion 27, as shown in FIG. 6, a thrust bearing 28 </ b> A is fitted to each of a pair of upper and lower opening edges in the central opening portion of the boss 28 fixed in the housing 7, and the upper portion of the boss 28 is An oil seal chamber 29 having a lid closing structure is provided on the side. Then, the narrow opening 22A at the lower end of the male screw rod member 22 is passed through the center opening of the boss 28, and the end of the protrusion 22A protruding to the opposite side is larger than the inner diameter of the center opening of the boss 28. The male screw rod member 22 is rotatably supported by fitting a lock nut 22B having a large outer diameter.

  The drive gear 25 of the male screw rod member 22 is meshed with the output gear 26 of the drive source Q, and the male screw rod member 22 is rotated by the operation of the drive source Q so that the male screw rod member 22 is rotated. When the outer cylinder member 21 is screwed into the outer cylinder member 21 via the screw nut member 23 and the outer cylinder member 21 is moved downward, it is sequentially inserted into the fixed mast member 2 fixedly arranged on the bridge. Each of the movable mast members 3 thus made can be expanded and contracted in a multistage manner. The rotation of the male threaded rod member 22 by the drive source Q can be stopped appropriately at an arbitrary position.

  Next, the use operation with the above configuration will be described. As shown in FIG. 5, when the mast body 1 is initially shortened to the minimum from the fully extended state, it is lifted and lowered by a screw rotating jack mechanism. When the drive source Q of the mechanism P is operated and the output gear 26 is rotated forward, the male screw rod member 22 is rotated forward via the drive gear 25 meshed with the output gear 26, and externally connected via the screw nut member 23. As the male threaded rod member 22 is screwed into the tubular member 21, the outer tubular member 21 moves downward. Accordingly, the uppermost moving mast member 3C is first housed in the upper middle moving mast member 3B, and then the upper middle moving mast member 3B is housed in the lower middle moving mast member 3A. Further, the lower middle mast moving mast member 3A is housed in the fixed mast member 2 at the lowest position. As a result, the mast body 1 itself can be shortened to a position corresponding to the height position of the fixed mast member 2.

  On the other hand, as shown in FIG. 6, when the mast main body 1 is extended to the maximum from the state where it is contracted to the minimum, the drive source Q of the lifting mechanism P by the screw rotation type jack mechanism is operated to output gears. When the screw 26 is rotated in the reverse direction, the male screw rod member 22 rotates in the reverse direction through the drive gear 25 meshed with the output gear 26, and the male screw rod member 22 from the inside of the outer cylinder member 21 through the screw nut member 23 is rotated. The outer cylinder member 21 moves in the upward direction by the unscrewing movement. Accordingly, the lower middle moving mast member 3A is first pushed out from the lowermost fixed mast member 2, and then the upper middle moving mast member from the lower middle moving mast member 3A. 3B is pushed out, and further, the uppermost moving mast member 3C is pushed out from the upper middle moving mast member 3B. Thus, in a state where the mast body 1 is pushed out and extended to the maximum extent, the outward projection 6 and the inward projection 5 are engaged with each other, so that the mast body 1 is straight along the vertical direction. It becomes a stretched state.

  Similarly to the previous embodiment, a manual elevating gear is connected to the output gear 26 or the drive gear 25 in the screw-rotating jack mechanism, and a manual handle is fitted to the manual elevating gear. The electric motor used as the drive source Q is provided with a brake mechanism, a ratchet type stopper mechanism, etc., and when the mast body 1 is lifted, Even if a loss such as disappearance or a failure of the loss occurs, it is considered that it stays in its rising position and does not descend.

The mast main body in the best form for implementing this invention is shown, (a) is a front view of the state which the mast main body extended | stretched, (b) is right side sectional drawing of the state which the mast main body extended | stretched, (c) FIG. 4 is a right side sectional view of a state where the mast body is shortened. It is an expanded sectional view of the state where the mast body was similarly extended. It is an expanded sectional view of the state where the mast main body contracted similarly. The mast main body in another example is shown, (a) is a front view of a state where the mast main body is extended, (b) is a right side view of a state where the mast main body is extended, and (c) is a state where the mast main body is contracted. It is a right view. It is an expanded sectional view of the state where the mast body was similarly extended. It is an expanded sectional view of the state where the mast main body contracted similarly.

Explanation of symbols

P ... Lifting mechanism Q ... Drive source 1 ... Mast body 2 ... Fixed mast members 3A, 3B, 3C ... Moving mast member 4 ... Sliding contact member 5 ... Inward projection 6 ... Outward projection 7 ... Housing 11 ... Rack member 12 ... Pinion 21 ... Outer cylinder member 22 ... Male threaded rod member 22A ... Hozo part 22B ... Lock nut 23 ... Screw nut member 24 ... Stopper member 25 ... Drive gear 26 ... Output gear 27 ... Bearing structure part 28 ... Boss 28A ... Thrust bearing 29 ... Oil seal chamber 31 ... Stand 32 ... Work light 33 ... Radar transmitter / receiver 34 ... Flashing signal light 35 ... Front towing light 36 ... Air horn 37 ... Mast light 38 ... Mooring light 39 ... Wind belief

Claims (3)

  A mast main body comprising a plurality of small-diameter cylindrical moving mast members that are sequentially inserted into a sheath shape so as to be extendable and retractable in a multistage manner on a fixedly arranged large-diameter cylindrical fixed mast member, and the moving mast member A telescopic mast device comprising an elevating mechanism that retracts and moves each while sequentially storing them in a fixed mast member.   The elevating mechanism is a rack drive jack mechanism in which a pinion arranged in a fixed mast member is engaged with a rack member arranged in a suspended manner with an upper end fitted and fixed in a moving mast member located in the uppermost stage. The telescopic mast device according to claim 1. The elevating mechanism is arranged in the fixed mast member on the screw nut member of the outer cylinder member which is arranged in a suspended manner with the upper end fitted and fixed in the movable mast member located at the uppermost stage and having a screw nut member at one end. 2. The telescopic mast device according to claim 1, wherein the telescopic mast device is a screw-rotating jack mechanism in which a male threaded rod member arranged upright so as to be rotatable by a disposed drive source is screwed.

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