JP4386480B2 - Anchoring device for shipboard crane - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an anchoring device for an on-board crane that is mounted on a ship, is used by moving in the front-rear direction of the ship during cargo handling, and is fixed on a deck during voyage.
[0002]
[Prior art]
Cargo ships often use cargo handling cranes on the quay side to handle cargo, but there are cargo ships equipped with shipboard cranes on their ships to facilitate cargo handling even in harbors where cargo handling facilities are insufficient. . In this cargo ship, as shown in FIG. 8, when the ship is moored on the quay, the onboard crane C moves on the rail R provided on the deck D before and after the ship (XX '). The trolley T, which moves in the direction and further lowers the suspension tool U in the left-right (YY ′) direction of the ship, moves on the shipboard crane C and handles the cargo holds H. And when a ship sails after finishing cargo handling, this onboard crane C moves to the mooring position P of the stern side of the hold H, and is anchored and fixed there.
[0003]
This fixing is performed by a anchoring device provided on the leg B of the onboard crane C. In the conventional anchoring device as shown in FIGS. 6 and 7, the deck side bracket 50 of the ship and the leg of the onboard crane C are fixed. The leg side bracket 49 provided in the part B is clamped from both sides by the anchoring bolt 44 and the anchoring nut 51.
[0004]
This anchoring device has a jack-up device J having a hydraulic jack 11 that can raise and lower the ship crane C one side at a time, and a fixing device F. The fixing device F includes a fixing mechanism for fixing the leg B to the deck D, and a screwing mechanism for clamping the leg-side bracket 49 and the deck-side bracket 50.
[0005]
This fixing mechanism is provided with anchoring pin holes 56a and 56b between the leg side bracket 49 and the deck side bracket 50 in the left and right and front and rear directions, and the two anchoring pins 46a and 46b are inserted into these holes. The structure is such that the front / rear / left / right movement of the leg B of the onboard crane C relative to D is fixed.
[0006]
The screwing mechanism includes a tether bolt 44 and a tether nut 51. The tether bolt 44 is lifted and lowered by using the handle 42a of the chain block 42, and the tether bolt 44 is rotated by a ratchet wrench. Screwed into the anchoring nut 51 whose rotation is restrained, and further tightened the anchoring bolt 44 with the hydraulic nut 45 disposed above the leg-side bracket 49, and the deck-side bracket 50 and the leg-side bracket 49 Is pinched.
[0007]
Further, by maintaining the hydraulic pressure of the hydraulic nut 45, the tightening force on the anchoring bolt 44 is maintained to prevent the anchoring bolt 44 from loosening. The tightening is firmly maintained by preventing the loosening, so that the onboard crane C does not move or fall even if it receives a repeated load due to the shaking of the ship during voyage.
[0008]
[Problems to be solved by the invention]
However, in this anchoring device, a hydraulic nut 45 having an outer diameter of 200 mm to 300 mm is applied in order to apply a force for tightening the anchoring bolt 44 when the onboard crane C is fixed and to maintain this tightening force during voyage. Since the hydraulic nut 45 needs to be manufactured by a special order, there is a problem that the cost of the anchoring device is increased.
[0009]
Also, in operation, it is necessary to work while changing the operation tool, such as raising and lowering the tether bolt 44 with the handle 42a of the chain block 42 and turning the tether bolt 44 using a ratchet wrench, so the work is complicated. In addition, the screwing of the anchoring nut 51 receives a large load during voyage, so a sufficient number of screw threads is required, and the screw pitch must be reduced to prevent loosening. Therefore, a large amount of rotation is required. In addition, there is a problem that a lot of work is required to rotate the anchoring bolt 44, such as tightening the anchoring bolt 44 with the hydraulic nut 41, and it takes time for fixing and releasing work.
[0010]
Furthermore, since an external hydraulic device such as a hand pump is required for the hydraulic source of the hydraulic nut 45, the hydraulic device is loaded and unloaded every time the tethering operation is performed, which makes the fixing and releasing operations complicated. There is a problem of becoming.
The present invention has been made in order to solve these problems, and the purpose of the present invention is to perform a tether fixing operation and a tether releasing operation easily and quickly by a simple mechanism and a simplified operation. An object of the present invention is to provide an anchoring device for an onboard crane that can be firmly fixed.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the anchoring device for an onboard crane according to the present invention includes a jackup device for jacking up the leg of the onboard crane at the time of anchoring and releasing the anchoring of the onboard crane, and fixing the leg to the deck. The jack-up device includes a jack provided on the leg side and a jack cradle provided on the deck side, and the fixing device includes a fixing mechanism and a telescopic mechanism. And the fixing mechanism comprises a first fitting groove provided on the leg side, a second fitting groove provided on the deck side, and a fitting member detachably fitted to both, An expansion / contraction mechanism includes a feed bolt suspended from the leg portion side, an expansion / contraction screw member screwed to the lower end side of the feed bolt, and a lower end side of the expansion / contraction screw member, and the leg Axial sliding on the tightening member provided on the side And engaging anchoring bolts in the ability is constituted by an engaging member for engaging detachably with the engaging portion provided at the lower end of the 該繋 distillate volts.
[0012]
With this configuration, the anchoring bolt can be efficiently moved up and down by manually rotating the expansion / contraction screw portion of the expansion / contraction mechanism. In addition, since only the tightening is performed with the tightening member, the operation can be performed very simply and quickly.
Another onboard crane anchoring device according to the present invention includes a jackup device for jacking up the legs of the onboard crane during anchoring and unlocking operations of the onboard crane, and a fixing device for fixing the legs to the deck. The jack-up device includes a jack provided on the leg side and a jack cradle provided on the deck side, and the fixing device includes a fixing mechanism and an expansion / contraction mechanism, The fixing mechanism comprises a first fitting groove provided on the leg side, a second fitting groove provided on the deck side, and a fitting member detachably fitted to both, and the telescopic mechanism comprises: A guide cylinder suspended by a tightening member provided on the leg side, a anchoring bolt engaged with the guide cylinder so as to be slidable in the axial direction, and an inner peripheral portion of a lower outer peripheral portion of the anchoring bolt And the outer peripheral part is provided on the leg part. A telescopic screw portion for lifting guide is screwed, it is constituted by an engaging member for engaging detachably with the engaging portion provided at the lower end of the anchoring bolt.
[0013]
According to this configuration, since the tightening member is engaged with the guide cylinder provided above the anchoring bolt, the tightening member does not need to be pressed in the axial direction when the anchoring bolt is tightened. It can be made weaker and lighter.
Further, since the tightening member is configured to be connected to the tightening cylinder via a lever, the tightening bolt can be tightened by the tightening cylinder to provide a tightening force. In addition to ensuring the locking of the anchoring bolt by maintaining the hydraulic pressure of the tightening cylinder, it is possible to reliably prevent the locking during the voyage and to firmly maintain the anchoring of the onboard crane.
[0014]
Further, since a commercially available hydraulic cylinder can be used as the tightening cylinder for rotating the tightening member, a custom-made hydraulic nut is not required, and the anchoring device is an inexpensive device. Furthermore, by using the hydraulic power source of the tightening cylinder also for the jack-up of the crane, it is not necessary to carry a hydraulic device such as a hand pump outside the device at the time of anchoring operation, and the anchoring operation can be performed easily and quickly. It can be carried out.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.
[First embodiment]
The anchoring device for an onboard crane according to the first embodiment of the present invention has a structure as shown in FIGS. 1 to 3, and the leg B of the onboard crane C is fixed at the time of anchoring and releasing the anchoring of the onboard crane. It consists of a jack-up device J for jacking up one by one and a fixing device F for fixing the leg B of the onboard crane C to the deck D.
[0016]
[Jack-up device J]
The jack-up device J is provided with a hydraulic jack 11 on the leg B side and a jack cradle 31 on the deck D side, and operates the hydraulic jack 11 with a hydraulic source such as a hydraulic pump (not shown) to By entering and exiting 11a and pressing the jack cradle 31, the onboard crane C can be lifted by each leg.
[0017]
[Fixing mechanism of fixing device F]
The fixing device F includes a fixing mechanism and an expansion / contraction mechanism. The fixing mechanism is a mechanism for fixing the leg B in the front-rear and left-right directions, and is a guide below the leg-side plate 10. The first fitting groove portion 19a formed in the portion 19 and the second fitting groove portion 32a provided on the anchor receiving base 32 on the upper deck bracket 30 on the deck D side facing the first fitting groove portion 19a are fitted into both of them. An anchor ring (fitting member) 20 is included.
[0018]
The anchor ring 20 is for preventing the leg B side and the deck D side from moving relative to each other in the front / rear / right / left direction of the hull, that is, in the horizontal direction. And a second fitting groove 32a, and a hole through which a tether bolt 14 to be described later passes is provided at the center.
And the weight of this anchor ring 20 is formed so that it may become the weight which can be moved and mounted in the 2nd fitting groove part 32a of the anchor cradle 32 by manual work.
[0019]
[Extension mechanism of fixing device F]
The expansion / contraction mechanism of the fixing device F is a mechanism for fixing the leg portion B in the vertical direction, provided on the shipboard crane C side, and a lower end portion 13b of the expansion / contraction screw member 13 for moving the anchoring bolt 14 up and down. The leg-side plate 10 and the deck-side bracket 30 are firmly held together by a lock plate (engaging member) 21 that is detachably engaged with an engaging portion 14a provided on the lower end side of the anchoring bolt 14. Then, the vertical direction of the leg B is fixed to the deck D side.
[0020]
Next, the configuration of this telescopic mechanism will be described in detail.
In the first embodiment shown in FIG. 1 to FIG. 3, the anchoring bolt 14 used for fixing in the vertical direction includes a feed bolt 12 suspended from a detent plate 18 provided on the leg B side, A telescopic screw member 13 screwed to the lower portion, a tether bolt 14 screwed to the lower side and engaged with the tightening member 6 provided on the leg B side so as to be slidable in the axial direction, It has a lock plate (engagement member) 21 that is detachably engaged with an engagement portion 14a provided at the lower end of the anchoring bolt 14.
[0021]
The feed bolt 12 has a square-shaped portion 12a at the top, and the rotation of the shaft-shaped rotation is prevented by inserting the square-shaped portion 12a into the square hole 18a of the rotation stop plate 18. The telescopic screw member 13 is a so-called turnbuckle whose upper part is screwed to the feed bolt 12 and whose lower part is screwed to the anchoring bolt 14.
The anchoring bolt 14 is guided at the upper part by the inner peripheral thread surface of the turnbuckle 13, at the intermediate part by the lifting guide part 15, and at the lower part by the guide part 19, and in the vertical direction, the leg side guide 7 is guided. It is configured to move up and down.
[0022]
With this configuration, the tether bolt 14 can be raised and lowered by manually rotating the handle 13a of the turnbuckle (expandable screw member) 13, but the upper end of the feed bolt 12 is fixed to the leg B side. For one rotation of 13, the moving amount of the anchor bolt 14 is the total amount of the screw pitch of the feed bolt 12 and the screw pitch of the anchor bolt 14, and as will be described later, the feed bolt 12 Since the load is not received at all, there is no worry about loosening and the screw pitch can be increased, so that it can be lifted and lowered efficiently.
[0023]
The engaging portion 14a is formed by a ring-shaped groove so that a U-shaped lock plate (engaging member) 21 can be inserted.
The lock plate 21 is preferably formed in a small size and light weight that can be detached and attached manually, but since it is a structural member that receives the force acting on the anchoring bolt 14, the size of the load is sufficient to withstand this. It is formed based on a design that fully considers the relationship between the frequency, the contact area with the lower surface of the deck-side bracket 30, the contact area with the engaging portion 14a, the thickness, the material, and the like.
[0024]
When the lock plate 21 has a weight or shape that is difficult to carry by hand, a slide method that can be supported by a guide is adopted so that the lock plate 21 can be easily detached from the engaging portion 14a. This is preferable from the viewpoint of work efficiency and safety measures. In addition, an end stopper 17 through which the anchoring bolt 14 is inserted is provided on the leg B side, and the turnbuckle 13 is lowered at the lower limit position of the anchoring bolt 14 by contacting the lower end side outer peripheral portion 13b of the turnbuckle 13. To stop. The lower limit position is provided so that the engaging portion 14a on the lower end side of the anchoring bolt 14 protrudes downward from the deck-side bracket 30 so that the lock plate 21 can be easily inserted into the engaging portion 14a. It is done.
[0025]
[Tightening mechanism]
Further, in order to retighten the locking bolt 14 and prevent it from loosening, the tightening member 6 is provided to be engaged with the locking bolt 14 so as to be slidable in the axial direction by a method such as a spline or a key. A lever 6a is provided on the fastening member 6, and the lever 6a is connected to a hydraulic tightening cylinder 5 provided on the leg B side. Then, the tightening cylinder 5 is moved to rotate the tightening member 6 in a range of about 90 degrees to perform tightening and loosening. When the lever 6a is moved by the tightening cylinder 5, only the tether bolt 14 is rotated and the lower outer peripheral portion 13b is inclined so that the turnbuckle 13 does not rotate, thereby ensuring a large frictional force.
[0026]
In addition, it is possible to prevent loosening during voyage by maintaining a tightening force of the anchoring bolt 14 by providing a check valve in the hydraulic circuit of the tightening cylinder 5 so that the hydraulic pressure can be maintained. it can.
In this configuration, when the anchoring bolt 14 is tightened and tightened, the lower end side outer peripheral portion 13b of the turnbuckle 13 presses the end stopper 17 downward, while the lock plate 21 which is an engaging member Presses the deck side bracket 30 upward, so that the end stopper 17, the lifting guide part 15, the leg part side guide 7, the leg part side plate 10, the guide part 19, the anchor ring 20, the anchor cradle 32, The deck side bracket 30 is fastened together and clamped, and the vertical direction of the leg B is fixed to the deck D.
[0027]
[Mounting and fixing work]
The anchoring and fixing work of the onboard crane configured as described above is performed as follows.
(1) Preparation for work First, when the onboard crane C is anchored and fixed, a hydraulic source such as a hydraulic pump is operated to stop the onboard crane C at a predetermined anchoring position.
[0028]
(2) At each leg B of the anchor ring 20 on the side of the mounting piece, the hydraulic jack 11 provided on the leg B side of the onboard crane C is operated to press the jack cradle 31 on the deck D side, After the leg B is jacked up and the anchor ring (fitting member) 20 is placed in the second fitting groove 32a of the anchor cradle 32, the hydraulic jack 11 is operated to gently lower the leg B. The upper side of the anchor ring 20 is fitted into the first fitting groove 19 a of the guide part 19.
[0029]
Next, in each leg B on the opposite saddle side, the hydraulic jack 11 is similarly operated to jack up the leg B and place the anchor ring 20 in the second fitting groove 32a of the anchor cradle 32. The shipboard crane C is lowered, and the upper side of the anchor ring 20 is fitted into the first fitting groove 19a of the guide part 19.
[0030]
(3) Set the tether bolt 14 Turn the handle 13a of the turnbuckle (expandable screw member) 13 and lower the tether bolt 14 until it abuts against the end stopper 17 until it stops. Then, the anchor ring (fitting member) 20 is penetrated and further protruded to the lower side of the deck side bracket 30. A lock plate (engagement member) 21 is inserted into the projecting engagement portion 14a, and a stopper plate (not shown) for preventing removal is engaged.
[0031]
Next, the turnbuckle 13 is rotated in the reverse direction, the anchoring bolt 14 is raised and manually tightened, and then the tightening cylinder 5 is operated to rotate and tighten the tightening member 6 via the lever 6a. .
(4) End The hydraulic pump is stopped and the anchoring operation is completed.
[0032]
[Mounting release work]
Moreover, the cancellation | release operation | work of the anchoring apparatus for drive | working the shipboard crane C is performed as follows.
(1) Removal of lock plate 21 At each leg B on one side of the onboard crane C, after starting a hydraulic power source such as a hydraulic pump (not shown), the tightening cylinder 5 is operated to tighten the tightening member 6 After rotating and loosening the anchoring bolt 14, turn the turnbuckle 13 manually to lower the anchoring bolt 14 to the lower limit position, disengage the stopper plate (not shown) to prevent the lock plate 21 from being removed. Pull out.
[0033]
(2) Raise the tether bolt 14 and rotate the storage turnbuckle 13 to raise and tether the tether bolt 14 until the lower end of the tether bolt 14 is above the guide portion 19 on the leg B side.
(3) Removal of the anchor ring 20 Next, the leg B on one side of the onboard crane C is jacked up using the hydraulic jack 11, the anchor ring 20 is removed from the anchor cradle 32, and the hydraulic jack 11 is removed. Operate and lower leg B.
(4) When each leg B on the one side of the shipboard crane C is finished, the same operation is repeated on each leg B on the opposite side to release the fixing.
[0034]
[Second Embodiment]
Next, a second embodiment shown in FIGS. 4 and 5 will be described.
[Fixing mechanism of jack-up device J and fixing device F]
The fixing mechanism of the jackup device J and the fixing device F is the same as that of the first embodiment.
[0035]
[Extension mechanism of fixing device F]
In the telescopic mechanism of the second embodiment, the guide cylinder 62 suspended from the tightening member 6 provided on the leg B side of the onboard crane C, and the spline engaging portion 62a on the guide cylinder 62 The anchoring bolt 64 which is slidable in the axial direction and the lifting guide 68 in which the inner peripheral part 63d is screwed to the lower outer peripheral part of the anchoring bolt 64 and the outer peripheral part 63c is provided on the leg part B. And an expansion / contraction screw member 63 and an engagement member 21 that is detachably engaged with an engagement portion 64a provided at the lower end portion of the anchoring bolt 64.
[0036]
That is, the double screw member 63, which is an expansion and contraction screw member, is screwed to the anchoring bolt 64 by the female screw portion 63d on the lower inner periphery, and is provided on the leg B side by the male screw portion 63c on the lower outer periphery. The screw member guide portion 68 is screwed into the screwed portion 68b. The screwing portion 68b has a large screw pitch and engages with a slide support portion 68c fixed to the leg B side with a key so as to be slidable in the vertical direction.
[0037]
The anchor bolt 64 is guided by the spline engaging portion 62a of the guide cylinder 62 at the upper portion, by the leg portion side guide 7 through the double screw member 63, and by the guide portion 19 at the lower end. And is configured to move up and down. Since the anchor bolt 64 is prevented from rotating by the spline engaging portion 62a of the guide cylinder 62, it does not rotate together with the double screw member 63, and moves up and down while the rotation direction is restrained.
[0038]
With this configuration, as shown in FIG. 5 (b), when the handle 63a is rotated, the double screw member 63 is rotated by the distance L1 while rotating between the support portion 68b by the male screw portion 63c on the lower outer periphery. On the other hand, the anchoring bolt 64 screwed into the female screw portion 63d on the lower inner periphery is raised and lowered as a whole by a distance L2.
[0039]
[Tightening mechanism]
Next, the tightening member 6 for tightening the anchor bolt 64 is provided so as to be slidable in the axial direction by spline engagement with the top of the guide cylinder 62, and the tightening member 6 is tightened via the lever 6a. The anchoring bolt 64 is tightened and loosened via the guide cylinder 62 by rotating within a range of about 90 degrees by the tightening cylinder 5.
[0040]
Further, in this configuration, when the anchoring bolt 64 is tightened, the lower end side outer peripheral portion 63b of the double screw member 63 and the lock plate 21 are disposed between the end stopper 17, the crane side bracket 10, and the guide portion 19. The anchor ring 20, the anchor cradle 32 and the deck bracket 30 are clamped, and the lift guide 15 and the leg guide 7 are clamped as compared with the first embodiment shown in FIGS. Therefore, it is not necessary to increase the compressive strength in the axial direction. Therefore, it is possible to design structurally easily, to reduce the failure, and to reduce the manufacturing cost.
[0041]
[Mounting and fixing work]
The anchoring and anchoring operations of the anchoring device of the second embodiment of FIGS. 4 and 5 are the same as those of the first embodiment of FIGS.
[0042]
〔effect〕
With the configuration of the first and second embodiments described above, the anchoring bolts 14 and 64 can be fixed by manually rotating the handles 13a and 63a of the expansion and contraction screw members 16 and 63 in the anchoring and fixing operation. After the engagement member 21 is lowered, and after the anchor bolts 14 and 64 are manually raised and tightened, only the tightening is performed by the tightening cylinder 5 via the tightening member 6. Since it can be performed, tethering and releasing work can be performed efficiently and in a short time with an apparatus having a relatively simple structure.
[0043]
Since this tightening can be performed with a strong force using the tightening cylinder 5 such as a hydraulic pressure, it is sufficient to firmly hold the leg side plate 10 and the deck side bracket 30 in the anchoring bolt 5. A force can be generated and a sufficient force can be maintained to prevent loosening when the tether is fixed.
[0044]
【The invention's effect】
As described above, according to the anchoring device for an onboard crane of the present invention, the anchoring bolt can be moved up and down simply and quickly by manually rotating a telescopic screw member such as a turnbuckle, Since the anchoring bolts can be easily tightened by the tightening member connected to the tightening cylinder, the onboard crane can be firmly anchored and fixed, and the loosening during the voyage can be easily prevented.
[0045]
Therefore, the anchoring device for an onboard crane according to the present invention is a device having a relatively simple structure, and can be efficiently and quickly performed by a simplified operation of the anchoring fixing operation and the anchor releasing operation. Moreover, it can be firmly anchored and fixed.
[Brief description of the drawings]
FIG. 1 is a front view including a partial cross section showing a first embodiment of an anchoring device for an onboard crane according to the present invention.
FIG. 2 is a side view including a partial cross section showing a first embodiment of a mooring device for an onboard crane according to the present invention, wherein (a) shows a tethered release state and (b) shows a tethered fixed state.
FIG. 3 is a view taken along arrow XX in FIG. 1;
FIG. 4 is a front view including a partial cross section showing a second embodiment of the anchoring device for an onboard crane according to the present invention.
FIGS. 5A and 5B are side views including a partial cross section showing a second embodiment of the anchoring device for an onboard crane according to the present invention, wherein FIG. 5A shows the anchor release state and FIG. 5B shows the anchor fixing state.
FIGS. 6A and 6B are front views including a partial cross section showing an anchoring device for an on-board crane using a hydraulic nut, wherein FIG. 6A is a partial unlocking state, and FIG. 6B is a partial view illustrating a anchoring fixed state;
FIG. 7 is a side view including a partial cross section showing an anchoring device for an onboard crane using a hydraulic nut.
8A and 8B are diagrams showing an outline of an onboard crane, in which FIG. 8A is a side view, FIG. 8B is a plan view, and FIG. 8C is a front view.
[Explanation of symbols]
5 Retightening cylinder 6 Retightening member 6a Lever 7 Leg side guide
10 Leg side plate 11 Hydraulic jack
12 Feed bolt 13, 63 Extension screw member
13a, 63a Handle 13b, 63b Lower end side outer periphery
14,64 Anchor bolt 14a, 64a Engagement part
15 Lifting guide 17 End stopper
19 Guide portion 19a First fitting groove
20 Anchor ring (fitting member) 21 Lock plate (engaging member)
30 Deck side bracket 31 Jack cradle
32 Anchor base 32a Second fitting groove
62 Guide cylinder 68 Screw member guide part B Leg part C Onboard crane D Deck H Hunakura J Jack-up device P Anchoring position R Rail S Hull T Trolley U Lifting tool

Claims (3)

A jack-up device for jacking up the legs of the on-board crane at the time of anchoring and releasing the mooring of the on-board crane; and a fixing device for fixing the legs to the deck. And a jack cradle provided on the deck side, and the fixing device includes a fixing mechanism and an expansion / contraction mechanism, and the fixing mechanism is provided on the leg side. A mating groove portion and a second fitting groove portion provided on the deck side, and a fitting member that is detachably fitted to the both, and the telescopic mechanism includes a feed bolt suspended on the leg portion side, An expansion / contraction screw member that is screwed to the lower end side of the feed bolt, and an engagement member that is screwed to the lower end side of the expansion / contraction screw member and that is slidable in the axial direction to the tightening member provided on the leg side. The anchoring bolts to be combined and provided at the lower end of the anchoring bolts Anchoring device shipboard crane constituted by an engaging member for removably engaging the engaging portion. A jack-up device for jacking up the legs of the on-board crane at the time of anchoring and releasing the mooring of the on-board crane; and a fixing device for fixing the legs to the deck. And a jack cradle provided on the deck side, and the fixing device includes a fixing mechanism and a telescopic mechanism, and the fixing mechanism is provided with a first fitting provided on the leg side. It comprises a mating groove part and a second fitting groove part provided on the deck side, and a fitting member detachably fitted to both, and the expansion / contraction mechanism is suspended by a tightening member provided on the leg part side The guide cylinder, the anchoring bolt engaged with the guide cylinder so as to be slidable in the axial direction, the inner peripheral part screwed into the lower outer peripheral part of the anchoring bolt, and the outer peripheral part to the leg part An expansion / contraction threaded portion that is screwed with the provided lifting guide, and the connection Anchoring device shipboard crane constituted by an engaging member for removably engaging the engaging portion provided at the lower end of the bolt. The anchoring device for an on-board crane according to claim 1 or 2, wherein the tightening member is connected to a tightening cylinder via a lever.

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