JP3151512U - Ship ladder fixing device - Google Patents

Abstract

Provided is a ship ladder fixing device that can be quickly and easily attached to and detached from an existing ladder and can fix the upper end of the ladder to the wall surface of the ship. SOLUTION: A pair of ladder connecting members 2 that are fitted to the upper end of a ladder frame S1 and are detachably fixed so as to be able to adjust an overlap allowance, and each ladder connecting member so as to form a parallel link mechanism with the ladder connecting member 2. A tube 3 that is rotatably connected to the upper end of 2, and is provided in the tube 3 so as to be slidable in the tube axis direction at both ends of the tube 3, and engages with the openings 33 </ b> C of the frames 33 on both sides, respectively. A pair of engagement pins 4, a biasing member 5 that is built in the tube body 3 and biases the engagement pin 4 in a direction to push out the engagement pin 4 from the tube opening, and is pulled by being pulled against the biasing force of the biasing member 5. And a wire that pulls the coupling pin 4 into the tube body 3, and is configured so that the angle of the tube body with respect to the ladder can be varied by a parallel link action by varying the overlap margin of each ladder connecting member with respect to the upper end of the ladder frame did. [Selection] Figure 5

Description

  The present invention relates to an apparatus for stably fixing an upper portion of a ladder when the ladder is stood and used for inspection work of a ship wall surface at a high place.

  When inspecting the frame, etc., as a structure on the bulkhead of a bulk carrier, when the mobile ladder is leaned against the hopper, the upper end of the ladder is securely fixed to the wall to stabilize the ladder. It is required to do. Conventionally, there has been little experience in providing a fixing device on a mobile ladder for such inspection work, and there are not many known documents regarding the technology developed for this purpose.

  For example, in Patent Document 1, a pair of locking pins at both ends of a hydraulic cylinder provided at the upper end of a ladder are caused to enter by hydraulic pressure into respective holes of a pair of frames formed on both sides of the ladder that has been set up. A technique for fixing a ladder to a ship wall is described.

  Further, in Patent Document 2, a link mechanism having a pair of locking bars that open / close to the left and right in accordance with the link action is attached to the upper end of the ladder, and the locking bars are attached to the frames on both sides of the ladder by operating the pulling string. An apparatus for fixing an upper end portion of a ladder to a wall surface by abutting is disclosed.

JP 2006-151061 A JP 2006-151062 A

  Various sizes of work ladders are provided in the ship, and during the inspection work of the frame of the ship wall surface, ladders of dimensions corresponding to the length of the hopper in each case are selected from these ladders, or A plurality of ladders are used in appropriate combination so as to have a specific height, and the uppermost end thereof is fixed to the wall surface. Here, the ladder used at the top is often different depending on the work place. However, it is not actually considered that any of the existing ladders is provided with the fixing device in advance. Therefore, for such work, the fixing device is configured separately from the ladder, and the fixing device is attached to and detached from the ladder selected to be positioned at the top according to the inspection work. It is indispensable for practical use to be replaced.

  In this case, the fixing device is attached to and detached from the ladder in the process before and after the inspection at the work site. Therefore, the fixing device is provided with a specific attaching and detaching mechanism that can be easily, quickly and reliably operated. It is necessary to keep it. Patent Documents 1 and 2 disclose basic fixing techniques to the wall surface of the ladder, but there are practical problems in relation to the specific application in which an existing ladder is selected and used for work in a ship. It does not specifically describe the attachment / detachment between the fixing device and the ladder.

  Further, when the upper end of the ladder is fixed between a pair of frames on both sides, for example, in Patent Document 1, if the height positions of the pair of holes of the opposed frames are different, the hydraulic cylinder is set to a predetermined angle in the corresponding direction. It is necessary to tilt it and install it on the ladder. In addition, when using ladders of different widths, it is necessary to change the mounting position of the fixing device on the ladder accordingly. However, as described above, Patent Documents 1 and 2 do not describe the detachable mounting means for the fixing device to the ladder, and specifically show the mounting angle and mounting position adjusting means at that time. Not.

  The present invention has been made to solve such a problem, and a fixing device for improving work stability can be reliably and easily attached to an upper end of an existing ladder having various specifications. It is an object of the present invention to provide a ladder fixing device for a ship equipped with means.

  In order to solve the above problems, the present invention is an apparatus for fixing a ladder suspended between a pair of frames to a wall surface of a shipboard in which a plurality of longitudinal rib-shaped frames are provided. A pair of ladder connecting members that are fitted and detachably fixed so as to allow adjustment of the overlap margin; and a tubular body that is rotatably connected to the upper end of each ladder connecting member so as to form a parallel link mechanism with the ladder connecting member; A pair of engaging pins that are slidably provided in the tube axis direction around the tube mouths at both ends and that engage with the openings of the frames on both sides, respectively, and the engaging pins that are built into the tube. A biasing member that biases in the direction of pushing out from the mouth, and one end attached to the engagement pin in the pipe body, the other end being drawn outside the pipe body, and pulled against the biasing force of the biasing member And a wire that pulls the engagement pin into the tube. By varying the overlapping margin of each ladder connecting member for, characterized by being configured such that the angle of the tube relative to a ladder made variable by the parallel link action.

  Further, in the present invention, the one end side is rotatably connected to the upper end of each ladder connecting member so that the interval between the pair of ladder connecting members can be adjusted with respect to the interval of the ladder frame, and the other end side And a pair of interval adjusting members that are slidably and fixedly fitted to the tube.

  In the present invention, the ladder connecting member is attached to the ladder so as to be fitted from the upper end of the ladder frame, and the ladder frame is fastened from both sides by screw holes and bolts formed on the side surfaces of the ladder connecting member. It is characterized by that.

  A device for fixing a ladder that stands between a pair of frames to the wall surface of a shipboard with a plurality of vertical rib-shaped frames according to the present invention is fitted on the upper end of the ladder frame, and the overlap allowance can be adjusted. A pair of ladder connecting members fixed detachably as a tube, a pipe connected to the upper end of each ladder connecting member, and is provided in the pipe so as to be slidable around the pipe ports at both ends in the pipe axis direction. A pair of engagement pins that respectively engage with the openings of the frames on both sides, a biasing member that is built in the tube and biases the engagement pin in a direction to push out the engagement pin from the tube opening, and one end is an engagement pin in the tube It is attached, and the other end is drawn to the outside of the tube body, and is composed of a wire that pulls the engagement pin into the tube body by pulling against the urging force of the urging member, so that the structure operates under elasticity. Tubing body with a built-in engagement pin and a connecting part for fixing the tubular body to the ladder It becomes extremely simple consisting. Further, since the connecting member is fitted to the upper end of the ladder frame and is detachably fixed, the attaching / detaching operation for replacing the existing ladder in the ship can be performed quickly and easily.

  In particular, in the ship ladder fixing device of the present invention, a pipe is provided at the upper end of each ladder connecting member so as to form a parallel link mechanism with the ladder connecting member, and the pipe is engaged with the openings of the frames on both sides. A pair of engaging pins are built in, and the overlapping angle of each ladder connecting member with respect to the upper end of the ladder frame is made different so that the angle of the tubular body relative to the ladder, that is, the angle of the engaging pin can be varied by the parallel link action. Therefore, even when the height positions of the opening portions of the frames on both sides are shifted from each other, the engaging pin can be engaged with both opening portions.

  In addition, by providing a pair of interval adjusting members that can adjust the interval between the pair of ladder connecting members with respect to the interval of the ladder frame, it is easy to change the installation interval to existing ladders of various specifications with different width dimensions. Can be linked.

  Furthermore, the ladder connecting member is attached to the ladder so as to be fitted from the upper end of the ladder frame, and the ladder frame is tightened from both sides by screw holes and bolts formed on the side surfaces of the ladder connecting member, so that the ladder connecting is simply performed. The member can be easily and reliably connected to the ladder frame simply by being covered from the outside. Further, the ship ladder fixing device can be attached to the ladder only by the function of the connecting member without attaching any fixing member or processing to the existing ladder. Moreover, if the structure which interposes a spacer is taken, it can respond easily also to the ladder of each specification from which the cross-sectional shape of a ladder frame differs.

It is a perspective view which shows the state in the middle of leaning a ladder on a ship's wall surface (inclined surface) using the ladder fixing apparatus for ship of this invention. It is a perspective view which shows the state which fixed the ladder to the ship's wall surface using the ladder fixing apparatus for ship of this invention. 1 is an external perspective view of a ship ladder fixing device according to the present invention. It is a section explanatory view of a ladder fixing device for a ship of the present invention. It is sectional explanatory drawing of the ladder fixing apparatus for ship in the case where the height position of the opening part of the flame | frame of both sides has shifted | deviated. It is sectional drawing around the lower part of the bulk carrier ship seen from the bow tail direction.

  As shown in FIG. 6, the inner side of the bulk carrier is formed in a vertical shape from the upper surface of the inclined surface 31 and the inclined surface 31 of the hopper that rises inclined from the bottom surface as the wall surface on both sides. A ship CH having a vertical wall surface 32 is formed. As shown in FIG. 1, the vertical wall surface 32 is provided with a plurality of frames 33 as reinforcing vertical ribs extending in the up-down direction at appropriate intervals in the bow-stern direction. In order to reinforce around the boundary between the inclined surface 31 and the vertical wall surface 32, the lower end of the frame 33 is formed to reach the upper portion of the inclined surface 31.

  As shown in FIG. 1, the frame 33 has a T-shaped cross section having a web 33 </ b> A that rises perpendicularly from the vertical wall surface 32 and the inclined surface 31, and a flange 33 </ b> B that protrudes from the tip of the web 33 </ b> A in the bow-stern direction. It is a shaped member. A circular notch for the purpose of improving the weldability of the frame 33 to the ship wall surface, etc., at the base portion of the web 33A, specifically, the base portion of the web 33A located at the boundary between the inclined surface 31 and the vertical wall surface 32 A shaped opening 33C is formed. The cross-sectional shape of the frame 33 is not limited to the T shape, and may be an L shape or other shapes.

  The ship ladder fixing device 1 of the present invention is a device for fixing a ladder S standing between an arbitrary pair of frames 33 as shown in FIGS. As shown in FIGS. 3 and 4, the main constituent members are a pair of ladder connecting members 2 that are detachably fixed to the upper end of the ladder frame S <b> 1 so as to be adjustable, and parallel to the ladder connecting members 2. A tube 3 that is rotatably connected to the upper end of each ladder connecting member 2 so as to form a link mechanism, and a tube 33 that is slidable in the tube axis direction around the tube ports at both ends of the tube 3, and has frames 33 on both sides. A pair of engagement pins 4 that respectively engage with the opening 33C of the tube, a biasing member 5 that is built in the tube body 3 and biases the engagement pin 4 in a direction to push out the engagement pin 4 from the tube opening, and one end in the tube body 3 The wire 6 is attached to the engagement pin 4 at the other end, drawn around the tube 3 at the other end, and pulled against the urging force of the urging member 5 to pull the engagement pin 4 into the tube 3. .

  The ladder S has, for example, a normal structure in which a plurality of steps S2 are spanned between a pair of ladder frames S1 having a square cross section. Each ladder connecting member 2 is configured as a rectangular tubular member having an open lower end so as to be fitted from the upper end of the ladder frame S1. Screw holes 7B are formed in both side surfaces of each ladder connecting member 2, and the ladder connecting member 2 is externally fitted to the ladder frame S1 so as to have an appropriate overlapping margin between the ladders. The ladder connecting member 2 is fixed to the ladder frame S1 by tightening the bolt 7A in the hole 7B and press-contacting the ladder frame S1 from both sides. In order to stabilize the pressure contact force to the ladder frame S1, the spacer 8 is inserted between the side surface of the ladder frame S1 and the inner side surface of the ladder connecting member 2 in the pressure contact portion as shown in FIG. If a plurality of spacers 8 having different plate thicknesses are prepared, it is possible to easily attach the ladder connecting member 2 to the ladder frame S1 having a different cross-sectional shape.

  As shown in FIG. 3, a flat plate-like connecting piece 2A is formed at the upper end of the ladder connecting member 2, and a connecting shaft 9 whose axial direction is perpendicular to the extending surface of the ladder S is formed on the connecting piece 2A. It is formed. Although it is possible to connect the tube 3 directly and freely to the connecting shaft 9, in this embodiment, the interval between the pair of ladder connecting members 2 can be adjusted with respect to the interval between the ladder frames S1. In addition, a pair of interval adjusting members 10 that are rotatably connected to the upper ends of the respective ladder connecting members 2 on one end side by the connecting shaft 9 and that are slidably and fixedly fitted to the tube body 3 on the other end side are provided. Yes. The interval adjusting member 10 is formed in a flat plate shape so that one end side thereof is in sliding contact with the connecting piece 2 </ b> A of the ladder connecting member 2 via the connecting shaft 9, and the other end side is a ring shape so as to be fitted around the outer periphery of the tube body 3. Formed. A screw hole formed by a nut 11 or the like is formed through the ring-shaped portion on the other end side, and a pair of interval adjusting members 10 are slid and positioned on the tube 3 in accordance with the interval of the ladder frame S1, and the screw The interval adjusting member 10 is fixed to the tube body 3 by tightening the bolt 12 in the hole and press-contacting the tube body 3. Note that flanges 13 are formed at both ends of the tube body 3 so that the distance adjusting member 10 does not fall out.

  As shown in FIG. 4, an engagement pin 4 is provided around the tube ports at both ends of the tube body 3 so as to be slidable in the tube axis direction so as not to be pulled out from the tube ports by a retaining portion (not shown). A stopper piece 4 </ b> A that abuts against the web 33 </ b> A of the frame 33 protrudes in the vicinity of the tip of the engagement pin 4. As the urging member 5 that urges the engaging pin 4 so as to push out from the tube port, a compression coil spring as shown in the figure is suitable. One end of a wire 6 is attached to the base end of each engagement pin 4. A wire lead-out tube 14 projects from the central portion of the tube 3 so as to be orthogonal to the axial direction of the tube 3, and the other end of the wire 6 is routed outside through the wire lead-out tube 14. ing. The other end of the wire 6 is attached with, for example, a string 16 extending below the ladder S via a shackle 15. A lid 17 capable of closing the tube opening of the wire lead-out tube 14 is attached to the middle of the wire 6. One end of a chain 18 is attached to the outer periphery of the tube body 3. The chain 18 is provided as a pair, for example.

  A procedure for fixing the ladder S to the ship wall surface (inclined surface 31) using the ship ladder fixing device 1 having the above configuration will be described. First, the ship ladder fixing device 1 is attached to the ladder S before the ladder S is erected. Specifically, after adjusting the position of the interval adjusting member 10 to the interval of the ladder frame S1 as necessary, the pair of ladder connecting members 2 are externally fitted to the upper ends of the ladder frame S1, and the spacers 8 are appropriately inserted. Then, the boat ladder fixing device 1 is fixed to the upper end of the ladder S by tightening the bolt 7A in the screw hole 7B. The other end of the chain 18 is wound around, for example, the uppermost step S2 in order to prevent it from falling off.

  Next, the ladder S is stood against the ship wall surface (inclined surface 31) with the ship ladder fixing device 1 as an upper side, and the wire 6 is pulled from the ship bottom through the string 16 as shown in FIGS. 4 is pulled into the tube 3 against the urging force of the compression coil spring 5, the tube port of the tube 3 is made to face the opening 33 </ b> C of the frame 33. Then, when the hand is released from the string 16, the engagement pins 4 are pushed out from the tube opening of the tube body 3 by the urging force of the compression coil spring 5 and engaged with the openings 33C on both sides as shown in FIGS. Accordingly, the ladder S is fixed to the ship wall surface. At that time, since the stopper piece 4A is elastically contacted to the edge of the opening 33C by the urging force of the compression coil spring 5, the lateral touch of the ladder S is also reduced.

  Further, when the height positions of the openings 33C of the frames 33 on both sides are shifted from each other, when the ship ladder fixing device 1 is attached to the ladder S, as shown in FIG. 5, each ladder connection to the ladder frame S1 is performed. The members 2 are attached with different overlapping margins. In the example shown in the drawing, the height of the opening 33C of the left frame 33 is lower than the height of the opening 33C of the right frame 33, and accordingly, the overlap of the exterior with respect to the ladder frame S1 of the left ladder connecting material is increased. It is made larger than the overlap margin with respect to the ladder frame S1 of the ladder connecting material 2 on the right side. Due to the displacement of the left and right ladder connecting members 2 in the parallel direction, the tube body 3 changes its angle with respect to the ladder by a parallel link action with the pair of ladder connecting members 2 as parallel nodes. It can be easily engaged with the pair of openings 33C whose height positions are shifted from each other.

  In the above, the suitable example of this invention was demonstrated. The present invention is not limited to the one described in the drawings, and various design changes can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Ladder fixing device for ship 2 Ladder connection member 3 Tubing body 4 Engagement pin 5 Energizing member (compression coil spring)
6 Wire 7A Bolt 7B Screw hole 10 Spacing adjustment member 33 Frame 33C Opening part CH Ship S Ladder S1 Ladder frame

Claims (3)

  A device that fixes a ladder suspended between a pair of frames on the wall of a ship with multiple vertical rib-shaped frames, and is fitted on the top of the ladder frame to allow for adjustment of the overlap allowance. A pair of ladder connecting members that are freely fixed, a tubular body that is rotatably connected to the upper end of each ladder connecting member so as to form a parallel link mechanism with the ladder connecting member, and a pipe body that is built into the tubular body and around the pipe ports at both ends. And a pair of engagement pins that are slidable in the tube axis direction and engage with the openings of the frames on both sides, respectively, and a bias that is built in the tube and biases the engagement pins in the direction of pushing out from the tube port A member, and a wire having one end attached to the engagement pin in the tube, the other end being routed outside the tube, and pulling the engagement pin into the tube by pulling against the urging force of the urging member The overlapping margin of each ladder connecting member with respect to the upper end of the ladder frame By varying, Senso ladder fixing apparatus characterized by being configured so that the angle of the tube relative to a ladder made variable by the parallel link action.   One end side is rotatably connected to the upper end of each ladder connecting member so that the interval between the pair of ladder connecting members can be adjusted to the interval of the ladder frame, and the other end side is slidable and fixed to the pipe body. The ship ladder fixing device according to claim 1, further comprising a pair of interval adjusting members that are externally fitted to each other. The ladder connecting member is attached to the ladder so as to be fitted from the upper end of the ladder frame,
3. A ship ladder fixing device according to claim 1, wherein the ladder frame is fastened from both sides by screw holes and bolts formed on the side surfaces of the ladder connecting member.

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