JP5458071B2 - Trolley-type lift - Google Patents

Description

  The present invention relates to a trolley-type lifting platform that is used when the ship bottom is fixedly supported on the front and rear bogies and is lifted from the sea to the land, and in particular, the front side and the rear side of the ship bottom. The present invention relates to a bogie type lifting platform in which each of the fixedly supported boards is supported by a front carriage and a rear carriage via a seesaw type tilting base.

When using a trolley-type lifting platform to lift a ship in the sea to the land, the front side of the bottom of the ship is fixedly supported by the front bogie and the rear side of the ship is fixedly supported by the rear bogie. Is done. The front and rear trolleys are lifted by running on a rail laid on an uphill road surface, and the uphill road surface often changes its inclination angle along the way. The slope of the road near the land where the factory is located is generally gentler than the slope near the sea.
For this reason, when the front carriage pulled up first reaches the gentle road surface and the rear carriage is still on the gentle road surface near the sea side, the inclination of the front carriage and the rear carriage will be different. As a result, the rear side of the bottom of the ship, which was supported and fixed to the rear bogie board, floats up, and the rear side of the ship bottom is no longer supported by the board, making it unstable, and in the worst case, the hull rolls over from the bogie type lift There are dangers that can cause major accidents.
In order to prevent this, an invention (Patent Document 1 and Patent Document 2) has been filed (Patent Document 1 and Patent Document 2) in which a board that fixes and supports the ship bottom is supported by a front carriage and a rear carriage via a seesaw plate. In this invention, the seesaw plate that supports the wood blocks can be fixedly supported at the front and back sides of the ship bottom by each of the front and back wood blocks, by following the change in the slope of the road surface and tilting relatively back and forth on the front and rear carriages. It has a structure.

JP 2004-12417 A JP 2009-158929 A

By the way, the seesaw plates provided on the front and rear trolleys have a structure that can be easily tilted back and forth around the support shaft, so that they can be tilted back and forth suddenly in situations where the hull is not mounted. Yes, there is a risk of accidents if this happens when an operator is working on a seesaw plate.
As a method for avoiding this, for example, a fixing pin or the like may be inserted into the side surface of the seesaw plate and fixed so as not to tilt back and forth. However, with this method, as soon as the fixing pin is removed, the seesaw plate suddenly tilts back and forth, causing an accident.
It is also possible to forget to remove the fixing pin immediately before the work.In this case, the seesaw plate is not tilted back and forth with the hull mounted, and the front and rear of the bottom of the ship are placed when the slope of the road surface differs between the front and rear trucks. It is also possible that the hull will roll over from the front and rear trolleys and become drowned after being lost.
Alternatively, the seesaw plate may be tilted back and forth due to the weight of the hull, and at that time, the fixing pin may jump out of the insertion hole vigorously, which may cause injury or equipment failure to the surrounding workers and devices. Furthermore, when the seesaw plate is tilted back and forth due to the weight of the hull, it is conceivable that the fixing pin is deformed and does not come off and the seesaw plate does not normally tilt back and forth.

  The present invention has been devised in view of the above problems, and has been devised to solve the problems. The object of the present invention is to provide a board for fixing and supporting the front side and the rear side of the ship bottom. If the hull is not placed on the seesaw type tilting base that is mounted on the top, a cart type lifting base that can avoid accidents due to suddenly tilting the front and rear sides of the seesaw type tilting base up and down It is to provide.

In order to achieve the above object, the present invention is a carriage type having a front carriage provided with a board supporting the front side of the ship bottom and a rear carriage provided with a board supporting the rear side of the ship bottom. In the lifting platform, the front carriage and the rear carriage are each provided with a seesaw-type tilting table that tilts up and down around the center, and the board is provided on each seesaw-type tilting table. Tilt shock absorbers that support the lower parts of the front and rear ends while elastically expanding and contracting are arranged vertically on the lower parts of the front and rear ends , respectively , and the tilt shock absorbers are provided with rollers, bearings, upper plates, upper tube plates, lower tubes The lower end of the bearing that supports the seesaw-type tilting base is fixed to the upper plate, and the upper plate is attached to the upper end of the upper cylindrical body in the vertical direction. Fixed, up and down The bottom plate is fixed to the lower end of the lower cylinder, the lower surface of the upper cylinder plate is opened, the upper surface of the lower cylinder is opened, and the inner surface of the upper cylinder is opened at the lower surface. A lower cylindrical body whose upper surface is opened from the lower surface of the upper cylindrical body, which is larger than the outer diameter of the cylindrical body, is inserted vertically, and the above-mentioned inside the upper cylindrical body and the lower cylindrical body. It is composed of a means in which the above-mentioned spring that elastically expands and contracts in the vertical direction is supported by being sandwiched between the upper plate and the bottom plate .

  According to the trolley-type lifting platform according to the present invention comprising means for solving the problems, the hull is placed on the front and rear trolleys with the support shaft of the seesaw-type tilting pedestal in between. Since the tilt buffer elastically expands and contracts vertically, the seesaw type tilting table can tilt up and down on the front and back sides, and in the state where the hull is not placed on the front and rear carts, the seesaw type tilting table The tilting shock absorbers installed before and after the support shaft elastically support the seesaw type tilting table to push up the seesaw type tilting table upward from both sides, so that either of the seesaw type tilting tables suddenly tilts up or down. It is possible to prevent the occurrence of an accident by suddenly tilting the front and rear sides of the seesaw-type tilting table up and down, thereby providing extremely new and beneficial effects. In .

It is a hull top figure showing the form for carrying out this invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a side view of the trolley | bogie type pulling up stand showing the form for implementing this invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a top view of the trolley | bogie type pulling up stand which shows the form for implementing this invention. It is a top view of the plank side part support beam laid horizontally between the seesaw type tilting stands which shows the form for implementing this invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a front view of the board side part support beam laid horizontally between the seesaw type tilting stands which shows the form for implementing this invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a side view of the plane side part support beam laid horizontally between the seesaw type tilting stands which shows the form for implementing this invention. It is sectional drawing of the spindle of the seesaw type tilting base attached between the cart side girders which shows the form for implementing this invention. (A) is a top view of the tilt buffer which shows the form for implementing this invention. (B) is a side view of a tilt buffer showing a form for carrying out the present invention. (C) is a front view of a tilt buffer showing a form for carrying out the present invention. (A) is the side view at the time of the shrinkage | contraction of the tilting buffer which shows the form for implementing this invention. (B) is the front view at the time of shrinkage | contraction of the tilting buffer which shows the form for implementing this invention. It is a top view of the board side part support beam laterally installed in the seesaw type tilting base attached to the right and left trolley side girders which shows the form for implementing this invention. BRIEF DESCRIPTION OF THE DRAWINGS (A) is a front view before the tilting of the plank side part support girder laterally installed on the seesaw type tilting table showing the embodiment for carrying out the present invention. (B) is the front view from the right side at the time of the left side support girder horizontally installed in the seesaw type tilting stand showing the form for carrying out this invention tilting to the left side. (C) is the front view from the right side at the time of the board side part support beam horizontally installed in the seesaw type tilting stand which shows the form for implementing this invention tilting to the right side. BRIEF DESCRIPTION OF THE DRAWINGS (A) is a side view before tilting the board side support girder laterally installed on a seesaw type tilting table showing a mode for carrying out the present invention. (B) is the side view at the time of the board side part support beam laterally installed in the seesaw type tilting stand which shows the form for implementing this invention tilting to the left side. (C) is a side view at the time of the right side tilting of the rocker side portion supporting girder horizontally installed on the seesaw type tilting table showing the embodiment for carrying out the present invention.

  Hereinafter, the present invention will be described more specifically based on embodiments for carrying out the invention described in the drawings.

  In the figure, the trolley-type lifting platform 1 is used when the bottom of the hull a is fixedly supported on the front and rear bogies and is lifted from the sea to the land. It may also be used when returning from land to the sea.

  A trolley-type lifting platform 1 includes a front trolley 2 having a board 12 that supports the front side of the bottom of the hull a, a front seesaw-type tilting pedestal 3 provided on the front trolley 2, and a front and rear thereof. The front tilt buffer 4 made, the rear cart 5 provided with a block 12 for supporting the rear side of the bottom of the hull a, the rear seesaw type tilting platform 6 provided in the rear cart 5 and the rear portion arranged in front and rear thereof It is composed of a tilt buffer 7 and the like.

  The front carriage 2 that supports the front side of the hull a has, for example, a rectangular shape when viewed from the plane. The front carriage 2 is a pair of carriage-side girders 21 that are arranged in parallel in the length direction with a gap between the left and right sides, and are arranged in the width direction on the front end side and the rear end side of the left and right carriage-side girders 21. A frame is composed of the cross beam 22 and the rear beam 23. In addition, an auxiliary string 24 that connects the front and rear cross beams 22 and 23 is attached in the length direction.

  Each of the left and right trolley side girders 21 is composed of a pair of, for example, groove-shaped steel 21a arranged side by side in parallel with a laterally U-shaped and an inverted U-shaped back to back. A front seesaw type tilting table 3 is provided between the pair of groove steels 21a of the left and right cart side girders 21. The front seesaw-type tilting table 3 is attached between the pair of groove steels 21a of the cart side beam 21 so that the front and rear sides tilt up and down.

  Further, wheels 25 are respectively provided at the lower portions of the front and rear ends of the pair of groove steels 21a of the carriage side girders 21 with the front seesaw type tilting table 3 interposed therebetween. Each wheel 25 is rotatably supported between a pair of groove steels 21a. The bearing plate which supports each wheel 25 is attached downward to the lower side of each grooved steel 21a. The wheels 25 are provided at a total of four locations on the left and right sides on the front side and on the left and right sides on the rear side of the lower portion of the front carriage 2.

  The front seesaw type tilting table 3 is prevented from further tilting the front seesaw type tilting table 3 between the pair of groove steels 31a on the lower side where the front and rear sides of the front seesaw type tilting table 3 are tilted up and down. Each stopper 36 is provided. The stopper 36 prevents the bottom surface of the front seesaw type tilting table 3 from coming into contact with the road surface b and the rail c due to excessive tilting.

  The front cross girder 22 disposed in the width direction on the front end side of the front carriage 2 is attached, for example, in a U shape with the grooved steel facing sideways and facing forward. Both end sides are fixed to the front end portions of the left and right cart side girders 21 by welding or the like. A lifting winch pulley 26 is attached to the center of the front cross beam 22 toward the front. A wire rope (not shown) is attached to the pulling winch pulley 26, and the front carriage 2 is lifted using the wire rope.

  The rear cross girder 23 arranged in the width direction on the rear end side of the front carriage 2 is attached, for example, in a U shape with the grooved steel facing sideways and facing rearward. Both end sides are fixed to the rear end portions of the left and right cart side girders 21 by welding or the like. The left and right ends of the rear cross beam 23 are connected to the distal end side of a flexible connecting member 11 that connects the front carriage 2 and the rear carriage 5. For example, a chain is used as the connecting member 11.

  A front guide guide rod 13 is provided on the upper surface of the front side of the carriage side beam 21 on one side of the front carriage 2. The lower part of the front guide guide rod 13 is mounted upward on the upper surface of the front side of the carriage side beam 21. The front guide guide rod 13 is then bent horizontally toward the outside and then bent upward again to extend upward.

  The front seesaw type tilting table 3 provided between the pair of channel steels 21a of the left and right cart side girders 21 is tilted up and down on the front cart 2 so that the wood 12 It functions to prevent the hull a from being separated from the bottom of the hull a and to support it. The front seesaw type tilting table 3 is arranged in the length direction of the front cart 2.

  The front seesaw-type tilting table 3 has a vertical main girder 31, a horizontal upper flange 32 fixed to the upper end of the main girder 31, and a shaft hole 33 penetrating therethrough at the lower center of the main girder 31. Yes. The upper end of the main beam 31 is formed horizontally. The lower end of the main girder 31 is formed so that the center is the highest and is inclined obliquely upward toward both ends, and the height gradually decreases.

  A cylinder 33a penetrates and is reinforced around the shaft hole 33. Both side surfaces of the main girder 31, the upper flange 32 and the cylinder 33a are reinforced by reinforcing ribs 31a, and both side surfaces of the main girder 31 and the upper flange 32 are reinforced by reinforcing ribs 31b.

  A cylindrical support shaft 34 passes through the shaft hole 33 of the front seesaw type tilting table 3 reinforced by the cylinder 33a. The diameter of the cylindrical support shaft 34 is slightly smaller than the inner diameter of the shaft hole 33, and the cylindrical support shaft 34 is attached through the shaft hole 33 of the front seesaw type tilting table 3 in a loose fit. ing.

  Both ends of the support shaft 34 are supported by bearings 21 b formed at the center of the pair of groove steels 21 a of the carriage side beam 21. The front seesaw-type tilting table 3 is configured such that both ends of the support shaft 34 penetrating through the shaft hole 33 of the main girder 31 are supported by the bearings 21b of the grooved steel 21a of the carriage side beam 21 so that the support shaft 34 The front and rear sides thereof are tilted up and down around the rotation center 34.

  Between the upper flanges 32 of the front seesaw type tilting table 3 respectively provided on the cart side girders 21 arranged on the left and right, the wood side support girders 35 are installed in the horizontal direction. The board side support girders 35 are horizontally provided in the front and rear, for example, at two places. The front and back wood side support girders 35 are composed of a pair of, for example, grooved steel 35a arranged side by side in parallel with a laterally U-shaped and reverse U-shaped back to back. The pair of groove steels 35a are connected and reinforced by a plurality of, for example, inverted L-shaped angle steels 35b fixed at the lower part thereof.

  Between the pair of groove steels 35a of the front and rear board side support girders 35, a board 12 for supporting and fixing the front side of the bottom of the hull a is attached. The board 12 is higher than the grooved steel 35a and has a longer length, and both end sides of the board 12 protrude outward from both ends of the grooved steel 35a. The board 12 is firmly fixed to both channel steels 35a by bolts that penetrate through a plurality of through holes formed in the channel steel 35a.

  The front tilt shock absorber 4 functions to support the lower portions of the front seesaw type tilt table 3 between the pair of groove steels 21a of the left and right cart side girders 21 while elastically expanding and contracting. It is. The front tilting shock absorber 4 is disposed at the lower part on both the front and rear ends of the front seesaw type tilting table 3 provided between the pair of groove steels 21 a of the left and right cart side girders 21. The front tilting shock absorber 4 is supported by a support plate 21c attached to protrude downward in a U-shaped section from the lower part of the pair of channel steels 21a of the carriage side beam 21.

  The front seesaw type tilting table 3 is prevented from suddenly tilting up and down by the front tilt buffer 4 disposed at the lower part of both front and rear ends. For example, when the front side of the front seesaw type tilting table 3 suddenly tries to tilt downward, the front tilt buffer 4 arranged on the front side supports the elastic tilting unit so that the front side faces downward. A sudden tilt is prevented. Further, when the rear side of the front seesaw type tilting table 3 suddenly tries to tilt downward, the front tilt buffer 4 arranged on the rear side supports the elastic tilting unit so that the rear side tilts downward suddenly. It is prevented from doing.

  The front tilt buffer 4 includes a roller 41, a bearing 42, an upper plate 43, an upper cylinder 44, a lower cylinder 45, a spring 46, and a bottom plate 47. The roller 41 is in contact with the lower surfaces of both sides of the main girder 31 of the front seesaw type tilting table 3 and supported from below, and both ends of the roller 41 are rotatably supported by bearings 42, and the front seesaw type tilting is supported. When contacting the lower surface of the table 3, the roller 41 is easily rotated to prevent the contact surfaces from being damaged.

  The bearing 42 that supports the roller 41 has a lower end fixed to the upper plate 43. The upper plate 43 is fixed to the upper end of a cylindrical upper cylindrical body 44 that is vertically oriented. The upper cylindrical body 44 has a circular shape. The lower surface of the upper cylindrical body 44 facing upward and downward is opened. A cylindrical lower cylindrical body 45 that is vertically oriented is inserted into the inside from the opened lower surface. The upper surface of the vertically downward lower cylindrical body 45 is opened.

  The inner diameter of the upper cylindrical body 44 whose lower surface opens is larger than the outer diameter of the lower cylindrical body 45 whose upper surface opens, and the lower cylindrical body 45 has a structure that can be inserted into the upper cylindrical body 44 through the lower surface opened. . A spring 46 is housed inside the upper cylindrical body 44 and the lower cylindrical body 45. For example, a coil spring is used as the spring 46. The spring 46 is housed inside the upper cylindrical body 44 and the lower cylindrical body 45 so as to elastically expand and contract in the vertical direction. A square bottom plate 47 is fixed to the lower end of the lower cylinder 45.

  The upper and lower ends of the internal spring 46 are sandwiched and supported by an upper plate 43 fixed to the upper cylindrical body 44 and a bottom plate 47 fixed to the lower cylindrical body 45, so that the upper cylindrical body is supported. 44 and the lower cylindrical body 45 can be elastically expanded and contracted vertically. In the front seesaw type tilting table 3 supported by the roller 41 in contact with the lower cylinder 45, the upper cylinder 44 is elastically expanded and contracted vertically by an internal spring 46, so that a sudden tilting operation is alleviated. It will be.

  The rear carriage 5 that supports the rear side of the hull a has, for example, a right-angled quadrilateral shape when viewed from the plane. The rear carriage 5 has a pair of carriage-side girders 51 arranged in parallel in the length direction with a gap between the left and right sides, and front parts arranged in the width direction on the front end side and the rear end side of the left and right carriage-side girders 51. A cross frame 52 and a rear cross beam 53 constitute a skeleton. In addition, an auxiliary stringer 54 that connects the front and rear crossers 52 and 53 is attached in the length direction.

  Each of the left and right trolley side girders 51 is composed of a pair of, for example, grooved steels 51a arranged side by side in parallel with a laterally U-shaped and reverse U-shaped back to back. A rear seesaw-type tilting table 6 is provided between the pair of groove steels 51 a of the left and right cart side girders 51. The rear seesaw type tilting table 6 is mounted between the pair of groove steel 51a of the cart side beam 51 so that the front and rear sides tilt up and down.

  In addition, wheels 55 are respectively provided at the lower portions of the pair of groove steels 51a of the carriage side girders 51 across the rear seesaw type tilting table 6 at the front and rear ends. Each wheel 55 is rotatably supported between a pair of groove steel 51a. A bearing plate that supports each wheel 55 is attached downward to the lower side of each grooved steel 51a. The wheels 55 are provided at a total of four locations on the left and right sides on the front side and on the left and right sides on the rear side of the lower portion of the rear carriage 5.

  A stopper 66 for preventing the rear seesaw type tilting table 6 from tilting further downward between the pair of groove steels 51a on the lower side where the front and rear sides of the rear seesaw type tilting table 6 are tilted up and down. Are provided. The stopper 66 prevents the rear seesaw type tilting table 6 from contacting the road surface b and the rail c due to excessive tilting.

  On both the left and right sides of the front half of the upper surface of the rear carriage 5, slide guides that can be expanded and contracted are guided to guide the left and right sides of the hull a while sandwiching and sliding toward the center of the rear carriage 5. A fence 14 is provided.

  The front cross girder 52 arranged in the width direction on the front end side of the rear carriage 5 is attached in a U shape, for example, with the grooved steel facing sideways. Both end sides are fixed to the front end portions of the left and right cart side girders 51 by welding or the like. The left and right ends of the front cross beam 52 are connected to the rear end side of the flexible connecting member 11 that connects the front carriage 2 and the rear carriage 5. As described above, for example, a chain is used for the connecting member 11.

  The rear cross girder 53 arranged in the width direction on the rear end side of the rear carriage 5 is attached, for example, in a U shape with the grooved steel facing sideways and facing rearward. Both end sides are fixed to the rear end portions of the left and right cart side girders 51 by welding or the like. On the left and right ends of the rear cross girder 53, a pair of tilting and raising and lowering hull fixing devices that support the right and left sides of the bottom of the hull a while being tilted and raised and lowered corresponding to the inclined surfaces. 15 is provided.

  The rear seesaw-type tilting table 6 provided between the pair of groove steels 51a of the left and right cart side girders 51 is tilted up and down on the rear cart 5 so that the wood 12 on the tilting table 12 is hulled. It functions to prevent and be fixed from the bottom of the ship a. The rear seesaw type tilting table 6 is disposed in the length direction of the rear cart 5.

  The rear seesaw-type tilting table 6 is formed with a vertical main girder 61, a horizontal upper flange 62 fixed to the upper end of the main girder 61, and a shaft hole 63 penetrating therethrough at the lower center of the main girder 61. . The upper end of the main girder 61 is formed horizontally. The lower end of the main girder 61 is formed so that the center is the highest and is inclined obliquely upward toward the both end sides, and its height gradually decreases.

  A cylinder 63a is penetrated and fixed around the shaft hole 63 to be reinforced. Both side surfaces of the main girder 61 and the upper flange 62 and the cylinder 63a are reinforced by reinforcing ribs 61a, and both side surfaces of the main girder 61 and the upper flange 62 are reinforced by reinforcing ribs 61b.

  A cylindrical support shaft 64 passes through the shaft hole 63 of the rear seesaw type tilting table 6 reinforced by the cylinder 63a. The diameter of the cylindrical support shaft 64 is slightly smaller than the inner diameter of the shaft hole 63, and the cylindrical support shaft 64 is attached through the shaft hole 63 of the rear seesaw type tilting base 6 in a loose fit. Yes.

  Both ends of the support shaft 64 are supported by bearings 51 b formed at the center of the pair of groove steel 51 a of the carriage side beam 51. The rear seesaw-type tilting table 6 is configured such that both ends of a support shaft 64 penetrating the shaft hole 63 of the main beam 61 are supported by the bearings 51b of the grooved steel 51a of the carriage side beam 51, thereby supporting the support shaft 64. The front and rear sides tilt up and down around the center of rotation.

  Between the upper flanges 62 of the rear seesaw-type tilting table 6 respectively provided on the cart side girders 51 arranged on the left and right, the wood side support girders 65 are horizontally arranged in the left-right width direction. The board side support girders 65 are horizontally provided in the front and rear, for example, at two places. The front and rear board side support girders 65 are constituted by a pair of, for example, grooved steel 65a, which are arranged in parallel with a back-to-back configuration of a lateral U-shape and an inverted U-shape. The pair of groove steels 65a are connected and reinforced by a plurality of, for example, inverted L-shaped angle steels 65b fixed at the lower part thereof.

  Between the pair of grooved steels 65a of the front and rear board side support girders 65, a board 12 for supporting and fixing the front side of the bottom of the hull a is attached. The board 12 is higher than the grooved steel 65a and has a longer length, and both ends of the board 12 protrude outward from both ends of the grooved steel 65a. The board 12 is firmly fixed to both grooved steels 65a by bolts that penetrate through a plurality of through holes formed in the grooved steel 65a.

  The rear tilt buffer 7 fulfills the function of supporting the lower portions on the front and rear ends of the rear seesaw type tilt table 6 provided between the pair of groove steels 51a of the left and right cart side girders 51 while elastically expanding and contracting. . The rear tilt shock absorber 7 is disposed at the lower part of both the front and rear ends of the rear seesaw tilt table 6 provided between the pair of groove steels 51a of the left and right cart side girders 51. The rear tilt shock absorber 7 is supported by a support plate 51c attached so as to protrude downward in a U-shaped cross section from the lower part of the pair of groove steel 51a of the carriage side beam 51.

  The rear seesaw-type tilting table 6 is prevented from suddenly tilting up and down by the rear tilt buffer 7 disposed at the lower part of the front and rear ends. For example, when the front side of the rear seesaw-type tilting table 6 suddenly tries to tilt downward, the rear tilt buffer 7 arranged on the front side supports the elastic contraction, so that the front side suddenly drops downward. Tilt is prevented. In addition, when the rear side of the rear seesaw type tilting table 6 suddenly tries to tilt downward, the rear tilt buffer 7 disposed on the rear side supports the elastic contraction, so that the rear side suddenly tilts downward. Is prevented.

  The rear tilt shock absorber 7 includes a roller 71, a bearing 72, an upper plate 73, an upper cylinder 74, a lower cylinder 75, a spring 76, and a bottom plate 77. The roller 71 contacts the lower surfaces of both sides of the main girder 61 of the rear seesaw type tilting table 6 and supports it from below. Both ends of the roller 71 are rotatably supported by bearings 72, and the rear seesaw type tilting table 6 is supported. When the roller 71 comes into contact with the lower surface, the rollers 71 are simply rotated to prevent the contact surfaces from being damaged.

  A bearing 72 that supports the roller 71 has a lower end fixed to the upper plate 73. The upper plate 73 is fixed to the upper end of a cylindrical upper cylinder 74 that is vertically oriented. The upper cylinder 74 has a circular shape. The bottom surface of the vertically upward upper cylinder 74 is opened. A cylindrical lower cylindrical body 75 is inserted into the inside from the opened lower surface. The upper surface of the vertically downward lower cylindrical body 75 is opened.

  The inner diameter of the upper cylindrical body 74 having the lower surface opened is larger than the outer diameter of the lower cylindrical body 75 having the upper surface opened, and the lower cylindrical body 75 has a structure that can be inserted into the upper cylindrical body 74 through the opened lower surface. . A spring 76 is housed inside the upper cylinder 74 and the lower cylinder 75. For example, a coil spring is used as the spring 76. The spring 76 is housed inside the upper cylindrical body 74 and the lower cylindrical body 75 so as to elastically expand and contract in the vertical direction. A square bottom plate 77 is fixed to the lower end of the lower cylinder 75.

  The upper and lower ends of the internal spring 76 are sandwiched and supported by an upper plate 73 fixed to the upper cylindrical body 74 and a bottom plate 77 fixed to the lower cylindrical body 75, so that the upper cylindrical body is supported. 74 and the lower cylinder 75 can be elastically expanded and contracted vertically. The rear seesaw-type tilting table 6 supported by the roller 71 is in contact with and supports the lower cylinder 75. The upper cylinder 74 is elastically expanded and contracted vertically by the internal spring 76, so that the abrupt tilting operation is alleviated. It becomes.

Next, the operation based on the configuration of the embodiment for carrying out the invention will be described below.
A board 12 is horizontally placed between the front seesaw type tilting bases 3 arranged on the left and right carriage side girders 21 of the front carriage 2 and the grooved steel 35a is penetrated by bolts and attached. Fixed to the seesaw-type tilting table 3. Similarly, a board 12 is installed between the rear seesaw-type tilting bases 6 respectively arranged on the left and right carriage-side girders 51 of the rear carriage 5, and the grooved steel 65a is penetrated by bolts and attached. Fix to the rear seesaw-type tilting table 6.

  The front carriage 2 and the rear carriage 5 are moved and sunk along the rail c of the road surface b inclined to the sea where the hull a floats, and are provided on the front guide guide rod 13 provided on the front carriage 2 and the rear carriage 5. The front and rear sides of the bottom of the hull a are fixed by placing them on the wooden blocks 12 of the front carriage 2 and the rear carriage 5 submerged in seawater using the slide guide guide rod 14 and the hull fixing device 15. .

  After the front side and the rear side of the bottom of the hull a are fixedly supported on the base 12 of the front carriage 2 and the rear carriage 5, the wire rope is attached to the lifting winch pulley 26 of the front carriage 2 and lifted. The rear carriage 5 connected to the front carriage 2 through the connecting member 11 also moves together, and the front carriage 2 and the rear carriage 5 carrying the hull a are lifted from the sea. That is, the front carriage 2 and the rear carriage 5 are lifted to the land by the wheels 25 and 55 traveling on the rail c laid on the climbing slope road surface b.

  The slope of the road surface b near the sea is slightly different, but the slope of the road surface b near the factory is gentle from the middle. For this reason, when the front carriage 2 and the rear carriage 5 are lifted up the road surface b of the same inclination angle near the sea side, the inclination angles of the front carriage 2 and the rear carriage 5 with respect to the road surface b are the same, The front seesaw type tilting table 3 and the rear seesaw type tilting table 6 provided thereon, the board 12 on the top seesaw type tilting table 6, and the inclination of the hull a mounted thereon are also in the same state.

  However, when the front carriage 2 is pulled up to a place where the slope of the road surface b near the factory is gentle, the inclination of the front carriage 2 becomes gentle and the inclination of the rear carriage 5 is different. In this case, the front seesaw type tilting table 3 of the front carriage 2 is gradually inclined downward on the rear side. On the other hand, the rear seesaw type tilting table 6 of the rear carriage 5 is gradually inclined downward on the front side, and the upper surfaces of the front seesaw type tilting table 3 and the rear seesaw type tilting table 6 are always maintained on the same plane. be able to.

  For this reason, the front side or the rear side of the ship bottom of the hull a is not separated from the surface of the board 12, and even if the inclination angle of the road surface b changes midway, it is fixedly supported by the board 12 and has no problem on land. Withdrawn.

  Further, when the empty front bogie 2 and the rear bogie 5 go down the road surface b inclined toward the sea in order to lift the floating hull a floating in the sea, or before the land hull a is returned to the sea and becomes empty. When the part cart 2 and the rear cart 5 are lifted to the land, the front side or the rear side of the front seesaw type tilting table 3 or the rear seesaw type tilting table 6 suddenly tends to tilt downward due to the reaction during the movement.

  However, the front seesaw-type tilting table 3 and the rear seesaw-type tilting table 6 are arranged in the front tilt buffer 4 and the rear tilt buffer 7 that are arranged on the front and rear sides of the support shafts 34 and 54 at the rotation center. Is supported from below.

  For this reason, the roller 41 of the front tilt buffer 4 and the roller 71 of the rear tilt buffer 7 in contact with the lower surface of the front side or rear side of the front seesaw type tilting table 3 or the rear seesaw type tilting table 6 are provided. Even if it is pushed downward suddenly, the springs 46 and 76 are elasticized by the action of the springs 46 and 76 provided in the lower cylinders 45 and 75 on the lower side of the rollers 41 and 71. It absorbs impacts slowly while shrinking.

  Thereby, it is possible to avoid the front seesaw-type tilting table 3 and the rear seesaw-type tilting table 6 from suddenly tilting to the front and rear sides, thereby preventing an accident from occurring.

  The present invention is not limited to the embodiment for carrying out the invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Bogie type lifting board 11 Connecting member 12 Wood block 13 Front guidance guide rod 14 Slide guidance guide rod 15 Hull fixing device 2 Front carriage 21 Bogie side girder 21a Grooved steel 21b Bearing 21c Support plate 22 Front cross girder 23 Rear Cross girder 24 Auxiliary vertical girder 25 Wheel 26 Pull-up winch pulley 3 Front seesaw-type tilting table 31 Main girder 31a Reinforcement rib 31b Reinforcement rib 32 Upper flange 33 Shaft hole 33a Cylindrical 34 Support shaft 35 Wood side support girder 35a Groove steel 35b Angle steel 36 Stopper 4 Front tilt buffer 41 Roller 42 Bearing 43 Upper plate 44 Upper cylinder 45 Lower cylinder 46 Spring 47 Bottom plate 5 Rear carriage 51 Dolly side girder 51a Groove steel 51b Bearing 51c Support plate 52 Front side Girder 53 Rear horizontal girder 54 Auxiliary vertical girder 55 Wheel 6 Rear seesaw-type tilting table 61 Main girder 61a Strong rib 61b Reinforcement rib 62 Upper flange 63 Shaft hole 63a Cylinder 64 Support shaft 65 Wood block side support girder 65a Groove steel 65b Mountain steel 66 Stopper 7 Rear tilt buffer 71 Roller 72 Bearing 73 Upper plate 74 Upper cylinder 75 Lower cylinder Body 76 Spring 77 Bottom plate a Hull b Road surface c Rail

Claims (1)

In the bogie type lifting platform having a front carriage provided with a board supporting the front side of the ship bottom and a rear carriage provided with a board supporting the rear side of the ship bottom, the front carriage and the rear carriage A seesaw type tilting table that tilts up and down with the center as the center of rotation is provided, and the board is provided on each seesaw type tilting table, and the lower part of each seesaw type tilting table is supported while elastically expanding and contracting. Tilt shock absorbers are arranged vertically below the front and rear ends , and the tilt shock absorber is composed of a roller, a bearing, an upper plate, an upper tube plate, a lower tube plate, a spring, and a bottom plate. The lower end of the bearing that supports the roller that supports the tilting base is fixed to the upper plate, the upper plate is fixed to the upper end of the upper cylinder that is vertically oriented, and the lower end of the lower cylinder that is vertically oriented Secure the bottom plate to the top Open the lower surface of the upper cylindrical plate, open the upper surface of the lower cylindrical body, and make the inner diameter of the upper cylindrical body that the lower surface opens larger than the outer diameter of the lower cylindrical body that opens the upper surface, A lower cylindrical body whose upper surface is opened is inserted vertically from the opened lower surface, and is supported vertically by being sandwiched between the upper plate and the bottom plate inside the upper cylindrical body and the lower cylindrical body. A trolley-type retraction pedestal characterized in that the above-mentioned elastically elastic spring is incorporated.

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