JP2013049566A - Foldable handrail apparatus of work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock a safety band that prevents an operator from falling down from a building roof even if a foldable handrail apparatus installed on the building roof of a work machine is folded.SOLUTION: The foldable handrail apparatus 200 has a fixed handrail 210 stood in the front and back direction of the building along to a roof side edge of the building 109R, and a movable handrail 220 that is installed at the fixed handrail 210 through a rotation mechanism, 250, rotates in the front and back direction of a crane in a plane 109RP along the side of the building 109L, and has overall low transportation posture and overall high work posture. The safety band can be locked to the fixed handrail 210.

Description

  The present invention relates to a folding handrail device for a work machine.

  Patent Document 1 discloses a folding handrail device provided on a building roof of a crane. This handrail device is folded so as to reduce the overall height during traveling, and is expanded so as to increase the overall height during inspection work, thereby preventing a fall accident from a worker's building roof.

  The handrail device of Patent Literature 1 has a fixing member that is erected along the side edge of the building roof, and a rotating member that is installed on the fixing member via a rotating mechanism and is folded to the crane center side. . A rotating member is erected above the fixed member along the side edge of the building roof during work, and the rotating member is folded to the center side of the crane during transportation.

JP 2003-95580 A

  Since the rotating member of the folding handrail device of Patent Document 1 is folded toward the center of the crane during transportation, an operator cannot move on the building roof.

(1) The invention of claim 1 is provided on a side surface of the building in order to climb various devices installed on a vehicle body provided on an upper portion of the traveling body, a building covering the various devices, and a roof of the building. In a folding handrail device of a work machine provided with a ladder, a fixed handrail erected in the front-rear direction of the building along a side edge of the roof of the building, and installed on the fixed handrail via a rotation mechanism And a moving handrail that rotates in the front-rear direction of the work machine within a plane along the side of the building and takes a transport posture with a low overall height and a work posture with a high overall height.
(2) The invention of claim 2 is the folding handrail device for the working machine according to claim 1, wherein the fixed handrail has a predetermined interval in the front-rear direction of the building in a plane along the side surface of the building. It has at least a plurality of fixed struts standing upright and a horizontal member connecting the upper ends of the fixed struts, and the rotation mechanism is provided on the top of the plurality of fixed struts, respectively. .
(3) A third aspect of the present invention is the folding handrail device for the working machine according to the first or second aspect, wherein the movable handrail is pivotally connected to the pivot mechanism so as to be pivotable. And a safety fence attached to the plurality of rotating struts, the safety fence has an upper horizontal member, a lower horizontal member, and a plurality of vertical members connecting the upper and lower horizontal members, The safety fence has an upper horizontal member connected at the upper side connecting portion by the rotating support post and an upper connecting mechanism, and the lower horizontal member is connected at the lower side connecting portion by the rotating support post and the lower connecting mechanism, respectively. The lower connection mechanism is removed, and the rotational force of the work machine in the front-rear direction around the upper side connection portion is applied to the moving handrail with the upper connection mechanism of the upper side connection portion as the rotation center. By giving the moving handrail The characterized in that it pivots between said working position and transport position.
(4) According to a fourth aspect of the present invention, in the folding handrail device for the working machine according to the third aspect, the upper coupling mechanism is inserted into the upper horizontal member and the upper side coupling portion of the rotating support column. An upper through hole is provided, and a lower through hole through which the lower connection mechanism is inserted is provided in the lower horizontal member and the lower side connection portion of the rotating support column, and the upper horizontal member has the moving handrail. Is further provided with a fixing through-hole for fixing the moving handrail when the moving handrail is in the transporting posture. The lower connection mechanism is inserted into the fixing through hole and the lower through hole of the rotating support column so as to constrain the rotation of the moving handrail.
(5) A fifth aspect of the present invention is the folding handrail device for a work machine according to any one of the first to fourth aspects, wherein at least one of the plurality of rotating mechanisms includes a moving hand in a transport posture. When the sliding is operated to the working posture, there is provided a stopper mechanism for preventing further rotation to the side opposite to the transportation posture side.

  According to the present invention, since the fixed handrail is erected on the building roof even in the transport posture, the safety belt can be attached to the handrail. Further, since the moving handrail is folded in the front-rear direction of the work machine in the transport posture, there is no hindrance to the movement on the roof.

The side view of the crawler crane provided with one Embodiment of the folding handrail apparatus by this invention Top view of FIG. A perspective view of the right building roof with the folding handrail device in the working posture as seen from the upper right and rear Front view of the folding handrail device of FIG. Side view of the fixed and rotating struts of the folding device in working position 4 shows details of the rotation mechanism at the left end of FIG. 4, and is a detailed view of the enlarged region 250E of FIG. VIB-VIB sectional view of the rotating mechanism of FIG. 6A A perspective view of the right building roof with the folding handrail device installed in the transport position as seen from the upper right and rear Side view of fixed and rotating struts of folding device in transport position The perspective view which looked at the left building roof where the folding handrail device of working posture was installed from the crawler crane center diagonally upper part The front view of the folding apparatus which takes the working posture of FIG. The perspective view which shows a part of folding apparatus which takes the working posture of FIG. The perspective view which looked at the left building roof where the folding handrail device of the transportation posture was installed from the crawler crane center diagonally upper part The partial front view of the folding apparatus which takes the transport posture of FIG. It is a figure which shows the detail of rotation mechanisms other than the left end of FIG. 4, and is detail drawing equivalent to FIG. 6A 14A is a cross-sectional view of the turning mechanism of FIG.

  Hereinafter, a folding handrail device according to the present invention will be described with reference to the drawings. Although the folding handrail device according to the present embodiment can be applied to various work machines, here, a folding handrail device applied to a crawler crane (hereinafter simply referred to as a crane) will be described.

The overall configuration of the crane will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view of a crane to which an embodiment of the present invention is applied, and FIG. 2 is a top view thereof.
As shown in FIG. 1, the crane includes a traveling body 101, a revolving body 102 that is turnable on the traveling body 101, a boom 103 that is pivotally supported by the revolving body 102, and a revolving body 102. And a counterweight device 115 installed on the rear surface. The swivel body 102 includes a main frame 102C at the center and left and right frames (not shown) installed on the left and right of the main frame 102C.

  A winch drum 104 is mounted on the main frame 102 </ b> C, and the wire rope 105 is wound or lowered by driving the winch drum 104, and the suspended load 106 moves up and down. The hoisting drum 107 is mounted on the main frame 102 </ b> C of the revolving structure 102, and the hoisting rope 108 is fed or retracted by driving the hoisting drum 107, and the boom 103 is raised and lowered. A counterweight device 115 is installed at the rear end of the main frame 102C. The counterweight device 115 is configured by stacking a plurality of counterweights.

  In FIG. 2, left and right buildings 109 </ b> L and 109 </ b> R are respectively provided on the left and right frames of the revolving structure 102. On the upper surfaces of the left and right frames, various devices and devices used to drive the crane, such as engines, hydraulic pumps, hydraulic valve devices, radiators and hydraulic oil tanks, are mounted. These devices and devices are covered by buildings 109L and 109R. It has been broken. A cab 111 is provided at the front end of the right frame. Folding handrail devices 200 and 300 are provided on the roofs of the buildings 109R and 109L, respectively. Further, step devices 112L and 112R project from the left and right side surfaces of the left and right frames of the revolving structure 102, respectively. A ladder 113 is provided behind the right side of the right building 109R. The operator can climb the upper surface (roof) of the right building 109R using the ladder 113 from the right step 112R. It is possible to move from the roof of the right building 109R to the upper surface of the counterweight device 115 and from there to further move to the upper surface (roof) of the left building 109L.

  1 and 2, reference numerals 101L and 101R denote left and right crawlers constituting the traveling body 101, reference numeral 116 denotes a boom pendant, reference numeral 117 denotes a live mast, and reference numeral 118 denotes a boom stop.

-Right-hand folding handrail device 200-
FIG. 3 is a view of the folding handrail device 200 installed on the roof of the right building 109R as viewed from the upper right rear side of the crane, and the handrail device 200 is in a working posture. FIG. 4 is a front view of the folding handrail device 200 in the working posture, and FIG. 5 is a side view of the fixed column 211 and the rotating column 221.

  The folding handrail device 200 includes a fixed handrail 210 erected along the side edge of the roof of the right building 109R, and a movable handrail 220 installed on the fixed handrail 210 via a rotation mechanism 250. . The moving handrail 220 rotates in the longitudinal direction of the crane in a plane along the side surface 109RP of the right building 109R, and between the working posture of FIG. 3 where the overall height is high and the transportation posture of FIG. The posture can be changed.

The fixed handrail 210 and the moving handrail 220 will be described in detail mainly with reference to FIG.
The fixed handrail 210 includes three fixed columns 211 erected at predetermined intervals along the side edge of the roof of the right building 109R, and a connecting member 212 having a predetermined length for connecting the bases of the pair of fixed columns 211. The upper horizontal member 213 having a predetermined length for connecting the upper portions of the pair of fixed columns 211, the lower horizontal member 214 having a predetermined length for connecting the lower portions of the pair of fixed columns 211, the upper horizontal member 213, and the base connecting member 212. And a connection plate 215 for connecting the two. That is, the plurality of fixed columns 211 of the fixed handrail 210 are erected at predetermined intervals in the longitudinal direction of the crane in the plane along the side surface 109RP of the right building 109R, and the upper ends of the fixed columns 211 are connected by the horizontal member 213. Has been.

  The moving handrail 220 is provided at the upper end of each fixed column 211. The movable handrail 220 includes a rotating support column 221 that can be rotated by a rotating mechanism 250 and a safety fence 222 attached to the rotating support column 221 by a connecting mechanism described later. The safety fence 222 includes an upper horizontal member 222aU and a lower horizontal member 222aL, and four vertical connecting members 222b that connect the two horizontal members 222aU and 222aL up and down, and the right end of the roof of the right building 109R. Extends in the longitudinal direction of the crane.

  As shown in FIG. 5, the upper horizontal member 222 a </ i> U of the safety fence 222 is connected to the upper connection portion of the rotating support column 221 by a bolt 223 and a nut 224. The lower horizontal member 222aL of the safety fence 222 is connected to the lower connecting portion of the rotating support column 221 by a bolt 225 and a wing nut 226. Bolts 223 and nuts 224 are upper connection mechanisms, and bolts 225 and wing nuts 226 are lower connection mechanisms.

  6A is a diagram for explaining the details of the leftmost rotation mechanism 250 among the three rotation mechanisms 250 shown in FIG. 4. FIG. 6A is an enlarged view of the reference numeral 250E in FIG. 5, and FIG. It is sectional drawing cut | disconnected and shown by the VIB line. 14A is a diagram for explaining the details of the rotation mechanism 250 other than the leftmost of the three rotation mechanisms 250 shown in FIG. 4, and is an enlarged view corresponding to FIG. 6A. FIG. 14 is an XIVB- It is sectional drawing cut | disconnected and shown by the XIVB line. The moving handrail 220 is manually operated by the operator between the transport posture and the working posture with the turning mechanism 250 as a turning fulcrum.

Details of the rotation mechanism 250 will be described with reference to FIGS. 6A and 6B.
A fork 211 a is provided at the upper end of the fixed column 211. A projecting portion 221 a that fits into the fork 211 a is projected from the lower end portion of the rotating column 221. As shown in FIG. 6B, a U-shaped metal fitting 251 is provided on the outer periphery of the fork 211a to which the protrusion 221a is fitted. The metal fitting 251, the fork 211 a and the protrusion 221 a are provided with through holes, and these three members are fastened by bolts 252 and nuts 253.

The function of the U-shaped metal fitting 251 is as follows.
In order to set the moving handrail 220 in the transporting posture to the working posture, the rotating support column 221 in the horizontal state is operated in the counterclockwise rotation direction. In the course of this operation, when the rotating support column 221 stands upright, the rotating support column 221 contacts the U-shaped bracket 251 so that the moving handrail 220 does not rotate further counterclockwise. It is configured. That is, the rotation mechanism 250 at the left end is provided with a stopper mechanism that prevents the rotation column 221 from rotating further to the side opposite to the transport posture.

  14A and 14B are diagrams illustrating the two right-hand turning mechanisms 250 in FIG. 6A and 6B is that the U-shaped metal fitting 251, that is, the stopper mechanism is omitted. Since the stopper mechanism only needs to be provided on any one of the three rotation mechanisms 250 of the moving handrail 220, the U-shaped fitting 251 is omitted from the two right rotation mechanisms 250.

  The moving handrail 220 moves when the safety fence 222 is connected to the rotating support column 221 by an upper connecting mechanism using bolts 223 and nuts 224 and a lower connecting mechanism using bolts 225 and wing nuts 226. The handrail 220 does not rotate by its own weight from the work posture to the transport posture.

  FIG. 7 is a view of the folding handrail device 200 in the transport posture as viewed from the diagonally right rear of the crane. FIG. 8 is a side view of the fixed column 211 and the rotating column 221 of the folding handrail device 200 in the transport posture. A procedure for operating the handrail device 200 in the work posture shown in FIG. 3 to the transport posture in FIG. 7 will be described.

  Prior to turning the movable handrail 220 in the working posture to the transportation posture, the three bolts 225 and the wing nut 226 that fasten the lower horizontal member 222aL to the turning column 221 are removed, and the bolt 223 of the upper horizontal member 222aU is removed. , Loosen the nut 224. In addition, when the handrail 220 is fastened to such an extent that it can rotate, it is not necessary to loosen it.

The operator turns the moving handrail 220 to the transport posture shown in FIG. 7 using the bolt 252 as a turning fulcrum. That is, the operator performs a turning operation so that the moving handrail 220 is tilted forward of the crane. The rotating support column 221 rotates to the front side of the crane with the bolt 252 of the rotating mechanism 250 as the center of rotation, and the safety fence 222 rotates to the front side of the crane with the bolt 223 as the upper coupling mechanism as the center of rotation. As a result, when the movable handrail 220 is in the transport posture, the through-hole 224U for transportation fixing provided in the upper horizontal member 222aU of the movable handrail 220 is used for connecting the safety fence provided in the rotating column 221. Since it faces the lower end side through hole, the bolt 225 is inserted into both the through holes and the wing nut 226 is tightened. As a result, the safety fence 222 of the moving handrail 220 is stably held in the transport posture, and is prevented from rattling due to vibration.
Of the three removed bolts 225 and three wing nuts 226, the remaining two are attached to the through holes of the lower horizontal member 222aL to prevent parts from being lost during transportation.

A procedure for changing the moving handrail 220 in the transport posture to the work posture will be described.
The bolt 225 inserted into the through hole 224u of the upper horizontal member 222aU is removed by loosening the wing nut 226. Also, the bolt 225 and the wing nut 226 attached to the lower horizontal member 222aL are removed. The rotating support column 221 in the horizontal posture, that is, the movable handrail 220 in the transporting posture is operated in the counterclockwise rotation direction with the rotation mechanism 250 as the rotation axis. When the rotating column 221 is in an upright state, the rotating column 221 contacts the U-shaped metal fitting 251 and is prevented from rotating further in the counterclockwise direction. In this state, since the through holes of the upper and lower horizontal members 222aL and 222aU of the moving handrail 220 are opposed to the through holes of the rotation mechanism 250, the bolt 225 and the wing nut 226 can be easily inserted.

-Left side folding handrail device 300-
FIG. 9 is a view of the folding handrail device 300 installed on the roof of the left building 109L as viewed from above the center of the counterweight device 115, and the handrail device 300 is in a working posture. 10 is a front view of the folding handrail device 300 in the working posture, and FIG. 11 is an enlarged perspective view of a main part of the folding device 300 in FIG.

  The folding handrail device 300 includes fixed handrails 310F and 310R erected along the side edge of the roof of the left building 109L, and moving handrails 320F and 320R. The movable handrails 320F and 320R are respectively installed on the fixed handrails 310F and 310R via the rotation mechanism 350, and are rotated to the rear of the crane in a plane along the side surface of the left building 109L. 9 and the work posture shown in FIG.

The fixed handrails 310F and 310R are the same, and the moving handrails 320F and 320R are the same. Hereinafter, the fixed handrail 310F and the moving handrail 320F on the crane front side will be described.
The fixed handrail 310F is a connecting member having a predetermined length that connects the three fixed columns 311 erected at predetermined intervals along the side edge of the roof of the left roof 109L and the base portions of the three fixed columns 311. 312, an upper connecting member 313 having a predetermined length for connecting the upper ends of the three fixed columns 311, and a lower connecting member 314 having a predetermined length for connecting the lower ends of the three fixed columns 311. Yes.
The fixed handrails 310F and 310R are connected by a connecting base 315 and a connecting horizontal member 316 between the fixed support columns 311 located between them.

  The movable handrail 320 </ b> F includes a rotation column 321 provided at the upper end of each fixed column 311 so as to be rotatable by a rotation mechanism 350, and a safety fence 322 attached to the rotation column 321. The safety fence 322 includes an upper horizontal member 322aU and a lower horizontal member 322aL, and four vertical connecting members 322b that connect the two horizontal members 322aU and 322aL up and down, and the left end of the roof of the left building 109L. Extends in the longitudinal direction of the crane.

  As shown in FIGS. 9 and 10, the upper horizontal member 322 a U of the safety fence 322 is connected to the upper connecting portion of the rotating support column 321 by a bolt 323 and a nut 324. The lower horizontal member 322aL of the safety fence 322 is connected to the lower connecting portion of the rotating support column 321 by a bolt 325 and a wing nut 326. Bolts 323 and nuts 324 are upper connection mechanisms, and bolts 325 and wing nuts 326 are lower connection mechanisms. This configuration is the same as that of the folding handrail device 200 installed on the roof of the right building 109R shown in FIG.

  FIG. 12 is a view of the folding handrail device 300 in the transport posture as viewed from above the center of the counterweight device 115. FIG. 13 is a front view of the crane rear side of the folding handrail device 300 in the transport posture as viewed from the left side of the crane. A procedure for operating the handrail device 300 in the working posture to the transportation posture of FIG. 12 will be described.

  Prior to turning the movable handrail 320 in the working posture to the transportation posture, the three bolts 325 and the wing nut 326 that fasten the lower horizontal member 322aL to the turning column 321 are removed, and the bolt 323 of the upper horizontal member 322aU is removed. , Loosen the nut 324. In addition, it is not necessary to loosen when the handrail 320 is fastened to such an extent that it can rotate.

  The operator turns the moving handrail 320 to the transport posture shown in FIG. 12 using the bolt 352 as a turning fulcrum. That is, the operator performs a turning operation so that the handrail 320 is tilted to the rear side of the crane. The rotating support column 321 rotates to the rear side of the crane with the bolt 352 of the rotating mechanism 350 as the rotation center, and the safety fence 322 rotates to the rear side of the crane with the bolt 323 as the upper coupling mechanism as the rotation center. As a result, when the moving handrail 320 is in the transporting posture, the through-hole 324U for fixing at the time of transportation provided in the upper horizontal member 322aU of the moving handrail 320 is connected to the safety fence connected to the rotating column 321. Since it faces the lower end side through hole, the bolt 325 is inserted into both through holes and the wing nut 326 is tightened. As a result, the safety fence 322 of the moving handrail 320 is stably held in the transport posture and is prevented from shaking with vibration.

  The procedure for changing the moving handrail 220 in the transport posture to the working posture is the same as the procedure described in the right building 110R.

  According to the folding handrail device of the embodiment described above, the following operational effects can be obtained. In addition, although the folding handrail device 200 provided in the right building 109R will be described, the same effect can be obtained with the folding handrail device 300 provided in the left building 109L.

(1) A turning mechanism 250 is provided on an upper portion of a fixed handrail 210 erected in the front-rear direction of the building along the side edge of the roof of the building 109R. It is installed so that it can rotate. The moving handrail 220 is rotated in the front-rear direction of the work machine in a plane along the side surface 109RP of the building 109R to change the posture between a transport posture with a low overall height and a work posture with a high overall height. According to the folding handrail device having such a configuration, even when the folding handrail device 200 is in the transport posture, the fixed handrail 210 is erected on the roof side end, so that the operator works on the roof of the building. At this time, a safety band that functions as an operator fall prevention device can be attached to the fixed handrail 210 or the folded movable handrail 220. Further, since the moving handrail 220 is not folded so as to cover the building roof, it cannot be an obstacle when the operator moves on the roof.

(2) The fixed handrail 210 includes a plurality of fixed columns 211 and horizontal members 213 and 214 that connect the upper portions of the fixed columns 211, and the rotation mechanism 250 is provided on each of the plurality of fixed columns 211. ing. Accordingly, the horizontal members 213 and 214 of the fixed handrail 211 also function as a safety fence for preventing falling from the roof even when the moving handrail 220 assumes the transport posture.

(3) At least one of the plurality of turning mechanisms 250 includes at least one of the moving handrails 220 when the moving handrail 220 in the transport posture is operated in the counterclockwise rotation direction and the rotating support column 221 stands vertically. A stopper mechanism is provided to prevent the rotation. Therefore, when changing the posture of the folding handrail device 200 from the transport posture to the working posture, the movable handrail 220 can be easily positioned in the working posture in which the rotating support column 221 stands up, and the bolt 225 for maintaining the working posture. And the wing nut 226 can be easily inserted into the fixing through hole 224U of the upper horizontal member 222aU.

(4) The moving handrail 220 includes a rotating column 221 that is rotatably connected to the rotating mechanism 250, and a safety fence 222 provided on the rotating column 221. In the working posture, the safety fence 222 is connected to the upper side through hole and the lower side through hole of the rotary column 221 by the connection mechanisms 223, 224 and 225, 226, respectively, and the rotation is restricted. In the posture change work from the work posture to the transport posture, the connection of the lower side through-holes by the coupling mechanisms 225 and 226 is released, so that the moving handrail 220 rotates from the work posture to the transport posture. Therefore, when changing the posture between the working posture and the transport posture, it is only necessary to remove the lower coupling mechanism, and the workability is also good.

(5) The safety fence 222 includes an upper horizontal member 222aU, a lower horizontal member 222aL, and a plurality of vertical members 222b that connect the upper and lower horizontal members. The upper horizontal member 222aU and the lower horizontal member 222aL are provided with through holes through which the coupling mechanisms 223, 224 and 225, 226 are inserted, respectively, and the upper horizontal member 222aU has a moving hand when the moving handrail 220 is in the transport posture. A fixing through-hole 224U for fixing the sliding is further provided. When the moving handrail 220 is in the transporting posture, a fixing through-hole 224U is provided at a position facing the lower through-hole of the rotating column 221. In the transport posture, the fixing through-hole 224U and the lower-side through-hole of the rotating column 221 are connected by a connecting mechanism. Therefore, the moving handrail 220 is stably held during transportation, and rattling is also prevented by vibration. As a backlash prevention mechanism, it is only necessary to provide the fixing through hole 224U in the upper horizontal member 222aU, and an increase in cost can be suppressed.

The embodiment described above can be modified as follows.
(1) Although the fixed handrail 210 is configured in a lattice shape by the fixed column 211 and the horizontal members 212 and 213, it may be a net shape instead of the lattice shape.
(2) Although the movable handrail 220 is configured by the rotating support column 221 and the grid-shaped safety fence 222 formed by the horizontal members 222aU and 222aL, a net-shaped safety fence may be used instead of the grid-shaped safety fence 222.
(3) Although the rotation mechanism 250 is provided at the upper end of the fixed column 211, if the moving handrail 220 is a position that rotates relative to the fixed handrail 210, the rotation mechanism 250 is installed at the fixed column 211. It is not limited to the upper end.

(4) At least one of the plurality of rotating mechanisms 250 may be provided with a frictional force applying mechanism that applies a frictional force that does not allow the movable handrail 220 to rotate with respect to the fixed handrail 210 due to its own weight. Thus, when the folding handrail device 200 is changed from the work posture to the transport posture, the moving handrail 220 is prevented from rotating to the transport posture by its own weight without the operator's intention.

(5) Although any one of the rotation mechanisms 250 is provided with a stopper mechanism for positioning the moving handrail 220 in the working posture, this stopper mechanism is not limited to the structure of the embodiment and may be omitted. .

(6) The mechanism for stably holding the moving handrail 220 in the transport posture is not limited to the embodiment. In the embodiment, the safety fence 222 is disposed above the fixed handrail 210 and is expanded in a rectangular shape during work, and the safety fence 222 is folded and arranged in parallel with the fixed handrail 210 during transportation. Various fixing mechanisms can be employed such that the moving handrail 220 folded downward does not rattle due to vibration.

  The present invention is not limited to the above-described embodiments and their modifications as long as the folding handrail device includes a fixed handrail and a movable handrail that rotates in the front-rear direction of the work machine. Not. The present invention can also be applied to various work machines other than cranes.

DESCRIPTION OF SYMBOLS 100: Work machine 102: Car body 109R, 109L: Building 200, 300: Folding handrail device 210, 310: Fixed handrail 211, 311: Fixed support column 220, 320: Moving handrail 221, 321: Rotating support column 222, 322 : Safety fences 223, 224, 323, 324: Upper connection mechanism (bolts, nuts, wing nuts)
225, 226, 325, 326: Lower connection mechanism (bolt, nut, wing nut)
250, 350: rotation mechanism

Claims (5)

A folding hand for a working machine, comprising: various devices installed on a vehicle body provided on an upper portion of a traveling body; a building that covers the various devices; and a ladder that is provided on a side surface of the building to climb the roof of the building. In the sliding device,
A fixed handrail erected in the front-rear direction of the building along the side edge of the roof of the building;
A movement that is installed on the fixed handrail via a rotation mechanism and rotates in the front-rear direction of the work machine in a plane along the side of the building to take a transport posture with a low overall height and a work posture with a high overall height. A folding handrail device for a working machine, comprising a handrail. In the folding handrail device of the working machine according to claim 1,
The fixed handrail has at least a plurality of fixed columns that are erected at a predetermined interval in the front-rear direction of the building in a plane along the side surface of the building, and a horizontal member that connects the upper ends of the fixed columns. ,
The folding handrail device for a working machine, wherein the rotation mechanism is provided on an upper portion of the plurality of fixed columns. In the folding handrail device of the working machine according to claim 1 or 2,
The moving handrail has a plurality of pivot columns rotatably connected to the pivot mechanism, and a safety fence attached to the plurality of pivot columns.
The safety fence has an upper horizontal member, a lower horizontal member, and a plurality of vertical members that connect the upper and lower horizontal members,
The safety fence has an upper horizontal member connected at the upper side connecting portion by the rotating support post and an upper connecting mechanism, and the lower horizontal member is connected at the lower side connecting portion by the rotating support post and the lower connecting mechanism, respectively.
The lower connection mechanism is removed, and the rotational force of the work machine in the front-rear direction around the upper side connection portion is applied to the moving handrail with the upper connection mechanism of the upper side connection portion as the rotation center. A folding handrail device for a working machine, wherein the moving handrail is rotated between the work posture and the transport posture by giving. In the folding handrail device of the working machine according to claim 3,
An upper through-hole through which the upper coupling mechanism is inserted is provided in the upper horizontal connecting portion of the upper horizontal member and the rotating column, and the lower horizontal connecting portion of the lower horizontal member and the rotating column is provided with the above-mentioned A lower through-hole through which the lower coupling mechanism is inserted is provided,
The upper horizontal member is further provided with a fixing through-hole for fixing the moving handrail when the moving handrail is in the transport posture,
The fixing through-hole faces the lower through-hole of the rotating support column when the moving handrail is in a transporting posture, and the lower part of the through-hole for fixing and the lower through-hole of the rotating support column A folding handrail device for a work machine, characterized in that the connecting mechanism is inserted to restrain the rotation of the moving handrail. In the folding handrail device of the working machine according to any one of claims 1 to 4,
At least one of the plurality of turning mechanisms is provided with a stopper mechanism that prevents further turning to the side opposite to the transportation posture side when the handrail in the transportation posture is operated to the working posture. A folding handrail device for a working machine.

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