JP6202073B2 - Lifting device for work machine - Google Patents

Description

  The present invention provides a work machine that is detachably provided on a work machine having an upper swing body provided on a lower traveling body, and that is disposed on a side surface of the upper swing body to move up and down relative to the upper surface of the upper swing body. The present invention relates to a lifting device.

  In a working machine such as a mobile crane, work is performed to ascend to the upper surface of the upper swing body and maintain and inspect equipment installed in the engine compartment. During this operation, an elevating device for moving up and down with respect to the upper surface of the upper swing body is detachably attached to the side surface of the upper swing body. If the lifting device is attached to the side surface of the upper swing body, the transport limit width is exceeded, so the lifting device is removed from the upper swing body during transport.

  In the work machine, a door provided on the side surface of the upper swing body is opened to perform maintenance / inspection of equipment provided in the engine compartment. During this work, the lifting device attached to the side surface of the upper swing body obstructs the opening and closing of the door. Therefore, it is conceivable to remove the lifting device, but it is troublesome to repeatedly attach and remove the lifting device.

  Therefore, Patent Document 1 discloses a lifting device that rotates in the horizontal direction. If the lifting / lowering device is rotated to a position where it is lifted / lowered with respect to the upper surface of the upper swinging body, the engine room can be accessed from the upper surface of the upper swinging body, while the lifting device is moved to a position retracted from the side of the upper swinging body. If it is rotated, the engine compartment can be accessed from the side surface of the upper swing body. Thereby, it is not necessary to attach or remove the lifting device one by one, and workability is improved.

  In addition, the thing of patent document 1 is the structure by which the raising / lowering apparatus is attached to the upper revolving body by the two hinges so that it cannot be removed. As an elevating device that is detachable from the upper swing body and rotates in the horizontal direction, both upper portions of a pair of left and right vertical members constituting the elevating device are detachably engaged with the upper swing body, When only the upper part of the vertical member is engaged with the upper revolving structure, there is one that rotates around the engaging part.

JP 2007-197965 A

  However, when only one upper part of the pair of left and right vertical members is engaged with the upper swing body, the lifting device that rotates around this engaging portion is supported by the upper swing body when rotating. Since the portion is only the upper part of one vertical member, the lifting device is inclined by its own weight during rotation, and the lower end of the other vertical member is positioned below the lower end of one vertical member. Therefore, in order to make the lifting device in a state where it can be raised and lowered, the operator lifts the other vertical member side of the inclined lifting device so that the lifting direction of the lifting device is parallel to the vertical direction, There is a problem in that the upper part of the vertical member has to be engaged with the upper swing body, and the burden on the operator is large.

  The objective of this invention is providing the raising / lowering apparatus of the working machine which can reduce the burden of the operator accompanying the operation | work which makes the raising / lowering apparatus a raising / lowering state.

  The present invention is detachably provided on a work machine having an upper swing body provided on a lower traveling body, and is disposed on a side surface of the upper swing body to move up and down with respect to the upper portion of the upper swing body. In the lifting device of the machine, a pair of left and right vertical members extending in the vertical direction, a plurality of horizontal members disposed between the pair of vertical members and spaced apart from each other in the vertical direction, and one upper portion of the pair of vertical members A first engagement member that is attached by a fastening member and detachably engages with a shaft member provided on an upper surface of the upper swing body, and is attached to the other upper part of the pair of vertical members by a fastening member; A second engaging member that is detachably engaged with a locking member provided on the upper surface of the revolving structure, and the fastening member is inserted through the first engaging member and the second engaging member. Each has a slot, and each slot has a The longitudinal direction is a direction orthogonal to the longitudinal direction of the vertical member. In the lifting device, the first engagement member is engaged with the shaft member, and the second engagement member is engaged with the locking member. When it is not, it is in a state in which it can be rotated in the horizontal direction around the shaft member.

  According to the present invention, the attachment position of the first engagement member with respect to the longitudinal member is set to the longitudinal direction of the longitudinal member by inserting the fastening member through the elongated hole of the first engagement member and attaching the first engagement member to the longitudinal member. Adjustment can be made in a direction orthogonal to the direction. Similarly, the fastening member is inserted into the elongated hole of the second engagement member, and the second engagement member is attached to the longitudinal member, so that the attachment position of the second engagement member with respect to the longitudinal member is in the longitudinal direction of the longitudinal member. It is possible to adjust in the orthogonal direction. And the inclination of the raising / lowering apparatus in the state which can rotate the raising / lowering apparatus is each adjusted by adjusting the attachment position of the 1st engagement member with respect to a vertical member, and the attachment position of the 2nd engagement member with respect to a vertical member, respectively. be able to. Thus, the tilt of the lifting device during rotation can be reduced. Therefore, when the lifting device can be lifted and lowered again, even if the amount of lifting the other vertical member is small, the locking member is The two engaging members can be easily engaged. Therefore, it is possible to reduce the burden on the operator associated with the work for setting the lifting device in a state where it can be lifted and lowered.

It is a side view of a crane. It is a perspective view of the guard structure concerning a 1st embodiment. It is a perspective view of a raising / lowering apparatus. It is a top view of a lifting device. It is a top view of the 1st engagement member. It is a side view of the 1st engagement member. It is a top view of the 2nd engagement member. It is a side view of the 2nd engagement member. It is explanatory drawing which shows the engagement state of a 1st engagement member and a shaft member. It is explanatory drawing which shows the engagement state of a 2nd engagement member and a locking member. It is a perspective view of the guard structure concerning a 2nd embodiment. It is a top view of a 3rd engagement member. It is a side view of a 3rd engagement member. It is explanatory drawing which shows the engagement state of a 3rd engagement member and a locking member.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
(Configuration of crane)
The working machine lifting / lowering device (lifting / lowering device) 1 according to the first embodiment of the present invention is detachably provided on a crane 20 that is a working machine. As shown in FIG. 1 which is a side view of the crane 20, an upper swing body 23 is provided on the lower traveling body 21 so as to be capable of swinging. I do.

  The lower traveling body 21 is an endless track vehicle. The upper swing body 23 is provided on the lower traveling body 21 so as to be swingable via a swing bearing 22.

  The upper swing body 23 includes an upper main body 24, a cab (operating cab) 27, a counterweight 25, a boom (not shown), and a mast (not shown) for raising and lowering the boom. Hereinafter, the cab 27 side is the front side, and the counterweight 25 side is the rear side.

  The upper body 24 is mounted (attached) to the lower traveling body 21 so as to be able to turn. An engine room is provided inside the upper body 24. A cover is provided on the upper surface of the upper body 24 so as to open and close the engine compartment. Further, a door 24a is provided on the side surface of the upper main body 24 so as to cover the engine chamber so as to be opened and closed.

  The counterweight 25 is a weight for balancing the suspended load of the crane 20. The counterweight 25 is removably attached to the rear end portion of the upper body 24.

  The lifting device 1 is for moving up and down with respect to the upper portion of the upper body 24. The lifting / lowering device 1 is detachably attached to the upper main body 24, and is disposed opposite to a door 24 a provided on a side surface of the upper main body 24. The elevating device 1 is configured to be switchable between an elevating state in which an operator can elevate and a rotating state rotating in a horizontal direction.

(Guard structure)
As shown in FIG. 2 which is a perspective view, a guard structure 31 is detachably attached to the upper surface of the upper body 24 with bolts. The guard structure 31 includes a pipe 32 extending in the front-rear direction of the crane 20, a shaft member 33 provided on one end side of the pipe 32, and a locking member 34 provided on the other end side of the pipe 32. ing. A first engagement member described later is detachably engaged with the shaft member 33. A second engaging member described later is detachably engaged with the locking member 34. The guard structure 31 is provided along the side edge of the upper surface of the upper body 24. The guard structure 31 is plated.

  The pipe 32 is disposed above the door 24 a on the side surface of the upper body 24. The pipe 32 functions as a scaffold for the worker ascending the lifting device 1. Thereby, it is prevented that the upper end of the door 24a is stepped on and damaged by the operator.

  The guard structure 31 is shaped symmetrically in the horizontal direction about the axis of the pipe 32. Therefore, even if the left and right sides of the guard structure 31 are reversed, the function of the guard structure 31 remains the same. That is, even if the left and right sides of the guard structure 31 are reversed, the pipe 32 is positioned above the door 24a, the first engagement member is detachably engaged with the shaft member 33, and the first engagement member 34 is engaged with the locking member 34. 2 Engagement members are detachably engaged.

(Shaft member)
The shaft member 33 has a cylindrical cylindrical member 41 extending in the vertical direction. By fitting a cylindrical member of a first engagement member, which will be described later, into the outer periphery of the cylindrical member 41, the first engagement member is detachably engaged with the shaft member 33. The cylindrical member of the first engaging member fitted to the cylindrical member 41 can rotate around the axis of the cylindrical member 41.

  The shaft member 33 has a ring-shaped stop member 42 provided on the outer periphery of the cylindrical member 41. The stopper member 42 is a stopper for receiving the cylindrical member of the first engaging member that fits into the cylindrical member 41 so that the cylindrical member of the first engaging member does not fit into the cylindrical member 41 too much.

  The shaft member 33 has a rotation restricting member 43 that protrudes radially outward from the ring-shaped stop member 42. When the cylindrical member of the first engaging member fitted to the cylindrical member 41 is rotated, a lower end portion of a bracket, which will be described later, of the first engaging member comes into contact with the rotation restricting member 43 from the horizontal direction. The rotation of the cylindrical member of the combined member is restricted.

(Locking member)
The locking member 34 has a plate-like plate member 44 facing in the vertical direction. The plate-like member 44 extends in the horizontal direction while leaving a gap with the pipe 32. An insertion member of a second engagement member described later can be inserted into the gap between the plate-like member 44 and the pipe 32. The plate-like member 44 is provided with a hole 44a penetrating in the vertical direction. Also, a hole is provided in the pipe 32 below the hole 44a. The insertion member of the second engagement member is inserted into the gap between the plate-like member 44 and the pipe 32, and a rod to be described later is inserted into the hole 44a provided in the plate-like member 44, the hole provided in the insertion member, and the hole provided in the pipe 32. By penetrating the member, the second engagement member is detachably engaged with the locking member 34.

  The locking member 34 has a guide member 45 disposed on the side of the pipe 32. The guide member 45 guides the insertion member in the direction in which the insertion member of the second engagement member is inserted into the gap between the plate-like member 44 and the pipe 32. A pair of guide members 45 are provided symmetrically in the horizontal direction about the axis of the pipe 32. The guide member 45 is formed of a plate extending in the horizontal direction at the same height as the upper end of the pipe 32, and a portion of the plate opposite to the pipe 32 is bent downward. The guide member 45 supports the insertion member from below and supports movement of the insertion member in the insertion direction.

(lift device)
As shown in FIG. 3 which is a perspective view, the lifting device 1 includes a pair of left and right vertical members 2 extending in the vertical direction, and a plurality of horizontal members 3 disposed between the pair of vertical members 2 and spaced apart from each other in the vertical direction. And a metal ladder. Handrail portions 4 extending in the up-down direction are provided on the upper portions of the pair of vertical members 2, respectively. The interval between the handrail parts 4 is made wider than the interval between the vertical members 2.

  The handrail portion 4 is formed by bending a pipe extending obliquely upward from the upper part of the vertical member 2 downward and disposing the lower end of the pipe above the vertical member 2. Hereinafter, the part including the lower end separated from the vertical member 2 in the handrail part 4 is referred to as a lower part 4 a of the handrail part 4. In addition, in this embodiment, the handrail part 4 is not an essential structure. The lower part 4 a of the handrail part 4 is a form of the upper part of the vertical member 2.

  A plate-like bracket 5 extending in the horizontal direction and facing in the horizontal direction is attached to the lower portion 4a of the handrail portion 4 by welding. A first engagement member, which will be described later, is detachably attached to one of the pair of brackets 5 with a bolt (fastening member), and a second engagement member, which will be described later, is removable with a bolt (fastening member). It is attached. It is possible to remove the first engagement member and the second engagement member from the pair of brackets 5 and attach the first engagement member and the second engagement member in reverse.

  As shown in FIG. 4, which is a top view of the lifting device 1, the pair of brackets 5 are parallel or substantially parallel to a direction (arrow direction) from the lower portion 4 a of the handrail 4 toward the center of gravity G of the lifting device 1. Are attached to the lower part 4a of the handrail 4 respectively.

  Returning to FIG. 3, both lower portions of the pair of vertical members 2 are bent in the horizontal direction, and buffer members 6 are respectively attached to these lower portions. The buffer member 6 is made of rubber or the like. When the lifting / lowering device 1 is attached to the upper main body 24, the buffer member 6 contacts the side surface of the upper main body 24.

(First engaging member)
As shown in FIG. 5A which is a top view and FIG. 5B which is a side view, the first engaging member 7 extends in the horizontal direction from the side surface of the cylindrical member 11 and faces the horizontal direction. And a plate-like bracket 12. The bracket 12 is provided with two elongated holes 12a through which bolts (not shown) are inserted with a gap in the vertical direction. The elongated hole 12a is a direction (horizontal direction) perpendicular to the longitudinal direction of the longitudinal member 2 so that the attachment position of the first engagement member 7 with respect to the longitudinal member 2 can be adjusted in a direction perpendicular to the longitudinal direction of the longitudinal member 2. Is the longitudinal direction. The first engagement member 7 is plated. In the axial direction (vertical direction) of the cylindrical member 11, the length of the bracket 12 is longer than the length of the cylindrical member 11, and the lower end portion of the bracket 12 projects downward from the lower end of the cylindrical member 11.

  The bracket 12 is detachably attached to one of the pair of brackets 5 by a bolt inserted into the elongated hole 12 a of the bracket 12. Thereby, the 1st engaging member 7 is attached to one upper part of a pair of vertical member 2. As shown in FIG.

  Here, as shown in FIG. 4, the pair of brackets 5 of the handrail portion 4 are parallel or substantially parallel to a direction (arrow direction) from the lower portion 4 a of the handrail portion 4 toward the center of gravity G of the lifting device 1. It is attached to the lower part 4a. Therefore, the longitudinal direction of the long hole 12a of the bracket 12 attached to the bracket 5 is a direction parallel or substantially parallel to the direction (arrow direction) from the lower part 4a of the handrail 4 toward the gravity center G of the lifting device 1.

  The inner diameter of the cylindrical member 11 is slightly larger than the outer diameter of the cylindrical member 41 (see FIG. 2) of the shaft member 33. When the cylindrical member 11 is fitted onto the outer periphery of the cylindrical member 41 of the shaft member 33 from above the shaft member 33, the first engagement member 7 is detachably engaged with the shaft member 33.

  As shown in FIG. 5A, the first engaging member 7 has a symmetrical shape with respect to an imaginary line A (a central plane parallel to the longitudinal direction of the vertical member 2) passing through the center of the cylindrical member 11 and the center of the bracket 12. Has been. Therefore, even if the left and right sides of the first engagement member 7 are reversed, the function of the first engagement member 7 remains the same. Note that the first engagement member 7 is not only symmetrical with respect to the left and right but also has a vertically symmetrical shape with respect to the center plane orthogonal to the longitudinal direction of the longitudinal member 2. Therefore, even if the first engagement member 7 is turned upside down, the function of the first engagement member 7 remains the same.

(Second engaging member)
As shown in FIG. 6A which is a top view and FIG. 6B which is a side view, the second engagement member 8 extends in a vertical direction from a plate-shaped insertion member 13 which faces in the up-down direction and the upper surface of the insertion member 13. And a plate-like bracket 14 facing in the horizontal direction. Two long holes 14a through which bolts (not shown) are inserted are provided in the bracket 14 with a space in the vertical direction. The elongated hole 14a is a direction (horizontal direction) perpendicular to the longitudinal direction of the longitudinal member 2 so that the attachment position of the second engagement member 8 with respect to the longitudinal member 2 can be adjusted in a direction perpendicular to the longitudinal direction of the longitudinal member 2. Is the longitudinal direction. The second engaging member 8 is plated.

  The bracket 14 is attached to the bracket 5 by a bolt inserted into the elongated hole 14 a of the bracket 14. Thereby, the 2nd engaging member 8 is attached to the other upper part of a pair of vertical member 2. FIG.

  Here, as shown in FIG. 4, the pair of brackets 5 of the handrail portion 4 are parallel or substantially parallel to a direction (arrow direction) from the lower portion 4 a of the handrail portion 4 toward the center of gravity G of the lifting device 1. It is attached to the lower part 4a. Therefore, the longitudinal direction of the long hole 14a of the bracket 14 attached to the bracket 5 is parallel or substantially parallel to the direction (arrow direction) from the lower portion 4a of the handrail 4 toward the gravity center G of the lifting device 1.

  The insertion member 13 is provided with a hole 13a penetrating in the vertical direction. The insertion member 13 is inserted and removed from the horizontal direction with respect to the gap (see FIG. 2) between the plate-like member 44 of the locking member 34 and the pipe 32.

  The second engagement member 8 includes a rod member 15 that can advance and retract in a direction perpendicular to the longitudinal direction of the long hole 14a, and a support member 16 that supports the rod member 15 so as to advance and retract in the axial direction. ing. The bar member 15 has a protruding portion 15a that protrudes in the direction perpendicular to the axial direction at the upper portion thereof. The support member 16 has a mounting portion 16a that can support the protruding portion 15a from below. Since the protrusion 15a is placed on the placement portion 16a, the bar member 15 cannot be moved downward in the axial direction. On the other hand, the protrusion 15a is removed from the placement portion 16a, whereby the bar member 15 can be moved downward in the axial direction.

  In a state where the insertion member 13 is inserted into the gap between the plate-like member 44 of the locking member 34 and the pipe 32, when the rod member 15 is moved toward the insertion member 13, the hole 44 a provided in the plate-like member 44 and The rod member 15 passes through the hole 13a provided in the insertion member 13 and the hole provided in the pipe 32. Thereby, the 2nd engagement member 8 engages with the locking member 34 so that attachment or detachment is possible.

  As shown in FIG. 6A, the second engagement member 8 has a symmetrical shape with respect to an imaginary line B (a central plane parallel to the longitudinal direction of the vertical member 2) passing through the center of the hole 13a and the center of the bracket 14. Has been. Therefore, even if the left and right sides of the second engagement member 8 are reversed, the function of the second engagement member 8 remains the same.

(Engaged state)
In the above configuration, as shown in FIG. 7 which is an explanatory diagram, the cylindrical member 11 of the first engagement member 7 is fitted into the outer periphery of the cylindrical member 41 of the shaft member 33 from above the shaft member 33. Thereby, the 1st engaging member 7 engages with the shaft member 33 so that attachment or detachment is possible. 7 shows a case where the first engagement member 7 is attached to the bracket 5 on the right side (left side in FIG. 3) toward the upper body 24.

  If the cylindrical member 11 of the first engaging member 7 is fitted on the inner periphery of the cylindrical member 41 of the shaft member 33, the fitting may be hindered by dust or rain water collected inside the cylindrical member 41. . On the other hand, by fitting the cylindrical member 11 of the first engaging member 7 on the outer periphery of the cylindrical member 41, both can be fitted without being affected by dust or rainwater collected inside the cylindrical member 41. it can.

  Further, as shown in FIG. 8, which is an explanatory diagram, the insertion member 13 is inserted into the gap between the plate-like member 44 of the locking member 34 and the pipe 32. At this time, the guide member 45 of the locking member 34 supports the insertion member 13 from below and supports the movement of the insertion member 13 in the insertion direction.

  Next, in a state where the insertion member 13 is inserted, the rod member 15 is passed through the hole 44 a provided in the plate-like member 44, the hole 13 a provided in the insertion member 13, and the hole provided with the pipe 32. Thereby, the 2nd engagement member 8 engages with the locking member 34 so that attachment or detachment is possible. In FIG. 8, the case where the second engagement member 8 is attached to the bracket 5 on the left side (right side in FIG. 2) toward the upper body 24 is illustrated.

  Even when force is applied to the lifting device 1 in the vertical direction with the second engagement member 8 engaged with the locking member 34, the insertion member 13 is sandwiched in the vertical direction by the locking member 34. The insertion member 13 cannot be removed from the locking member 34. Even if a force is applied to the lifting device 1 in the horizontal direction, the insertion member 13 is not detached from the locking member 34 because the bar member 15 prohibits the movement of the insertion member 13 in the horizontal direction. Therefore, even when force is applied to the lifting device 1 from any direction, the engagement state between the second engagement member 8 and the locking member 34 can be reliably maintained.

  Further, the insertion member 13 can be easily inserted into the locking member 34 by guiding the insertion member 13 in the direction in which the insertion member 13 is inserted into the locking member 34 with the guide member 45.

  When the first engaging member 7 is engaged with the shaft member 33 and the second engaging member 8 is engaged with the locking member 34, the elevating device 1 is in a state in which it cannot be rotated and can be raised and lowered. Become. The worker moves up and down using the lifting device 1, and moves up to the upper part of the upper swing body to perform maintenance and inspection work on the equipment deployed in the engine compartment.

  On the other hand, in the lifting device 1, when the first engagement member 7 is engaged with the shaft member 33 and the second engagement member 8 is not engaged with the locking member 34, the lifting device 1 is horizontal with the shaft member 33 as the center. Can be rotated. The operator rotates the lifting / lowering device 1 so that the door 24a provided on the side surface of the upper main body 24 can be accessed, opens the door 24a, and performs maintenance / inspection of the equipment deployed in the engine compartment. Do work.

  When the elevating device 1 is rotated, the lower end portion of the bracket 12 of the first engaging member 7 abuts against the rotation restricting member 43 from the horizontal direction as shown in FIG. Is regulated. Thereby, it is possible to prevent the lifting device 1 from colliding with the side surface of the upper body 24.

  In addition, as shown in FIG. 2, the guard structure 31 has a shape that is symmetrical with respect to the horizontal direction about the axis of the pipe 32. Further, as shown in FIG. 5A, the first engagement member 7 has a symmetrical shape with respect to the virtual line A. Furthermore, as shown in FIG. 6A, the second engagement member 8 has a symmetrical shape with respect to the virtual line B. Therefore, when the guard structure 31 is attached to the upper main body 24 with the left and right sides reversed, and the first engagement member 7 and the second engagement member 8 are attached to the pair of vertical members 2 in the reverse direction, It is possible to reverse only the rotation direction of the lifting device 1 without changing the rotation state. Thereby, the workability of the maintenance / inspection work can be improved.

  Further, the guard structure 31, the first engagement member 7, and the second engagement member 8 are plated. Therefore, it is hard to be damaged with respect to the sliding by the rotation of the lifting device 1. Moreover, even if these are damaged, generation | occurrence | production of rust can be suppressed by the sacrificial stick erosion action of plating. Further, by performing a plating process on the guard structure 31 that is removable with respect to the upper body 24 and the first engagement member 7 and the second engagement member 8 that are removable with respect to the vertical member 2, The plating process is easy and the area to be plated can be kept small.

  When the engagement between the second engagement member 8 and the locking member 34 is released and the engagement between the first engagement member 7 and the shaft member 33 is released, the lifting device 1 is moved to the upper body 24. Removed against. The operator removes the lifting / lowering device 1 from the upper main body 24 during transportation and moves the crane 20.

(Elevation device tilt correction)
Here, in a state in which the lifting device 1 is rotatable, one upper portion of the pair of vertical members 2 is supported by the engagement between the first engagement member 7 and the shaft member 33, but the pair of vertical members 2 is not supported. The other upper part of the member 2 is not supported. Therefore, when the lifting / lowering device 1 is rotated in this state, the lifting / lowering device 1 is inclined by its own weight during rotation, and the lower end of the other vertical member 2 that is not supported is the lower end of the supported vertical member 2. It will be in the state located below. In order to make the lifting / lowering device 1 liftable again from this state, the operator lifts the other vertical member 2 side of the tilted lifting / lowering device 1 so that the lifting / lowering direction of the lifting / lowering device 1 is parallel to the vertical direction. Thus, the second engaging member 8 must be engaged with the locking member 34, which places a heavy burden on the operator.

  Therefore, in the present embodiment, the first engagement member 7 is attached to the bracket 5 of the lower portion 4a of the handrail portion 4 by inserting a bolt into the long hole 12a provided in the bracket 12 of the first engagement member 7. Adopted. Therefore, if the insertion position of the bolt with respect to the elongated hole 12a is adjusted, the attachment position of the first engagement member 7 with respect to the vertical member 2 can be adjusted in a direction orthogonal to the longitudinal direction of the vertical member 2. Similarly, a configuration is adopted in which a bolt is inserted into a long hole 14 a provided in the bracket 14 of the second engagement member 8 and the second engagement member 8 is attached to the bracket 5 of the lower portion 4 a of the handrail portion 4. . Therefore, if the insertion position of the bolt with respect to the long hole 14 a is adjusted, the attachment position of the second engagement member 8 with respect to the vertical member 2 can be adjusted in a direction orthogonal to the longitudinal direction of the vertical member 2.

  And in this embodiment, the raising / lowering apparatus 1 rotates by adjusting the attachment position of the 1st engagement member 7 with respect to the vertical member 2, and the attachment position of the 2nd engagement member 8 with respect to the vertical member 2, respectively. The tilt of the lifting device 1 in a possible state is corrected.

  Specifically, if the height of the lower end of the other vertical member 2 is lower than the height of the lower end of the one vertical member 2 at the time of rotation, the position of the lower end of the other vertical member 2 is preliminarily set to one vertical member 2. The first engagement member 7 is attached to the bracket 5 so as to be higher than the height of the lower end of the member 2. That is, the first engaging member 7 is attached to the bracket 5 so that the lifting device 1 is tilted in anticipation that the lifting device 1 is tilted during rotation. Thereby, when the lifting / lowering device 1 is rotated, the inclination of the lifting / lowering device 1 can be reduced. Therefore, when the lifting / lowering device 1 can be lifted and lowered again, the second engaging member 8 can be easily engaged with the locking member 34 even if the amount of lifting the other vertical member 2 is small. .

  Here, the lifting / lowering device 1 is inclined toward the center of gravity G during rotation. Therefore, in order to suitably correct the inclination of the lifting device 1, it is necessary to adjust the attachment positions of the first engagement member 7 and the second engagement member 8 with respect to the center of gravity G. That is, even if the attachment position of the crane 20 is adjusted in parallel to the front-rear direction or the left-right direction, the inclination of the lifting device 1 cannot be corrected effectively.

  In the present embodiment, as described above, the longitudinal direction of the long hole 12a of the bracket 12 of the first engagement member 7 is parallel to the direction (arrow direction) from the lower portion 4a of the handrail 4 toward the center of gravity G of the lifting device 1. Or almost parallel. The longitudinal direction of the long hole 14a of the bracket 14 of the second engagement member 8 is parallel or substantially parallel to the direction (arrow direction) from the lower portion 4a of the handrail 4 toward the center of gravity G of the lifting device 1. Therefore, the attachment positions of the first engagement member 7 and the second engagement member 8 can be adjusted with respect to the center of gravity G. Thereby, compared with adjusting an attachment position in parallel with the front-back direction and the left-right direction of the crane 20, the inclination of the raising / lowering apparatus 1 can be correct | amended suitably.

(effect)
As described above, according to the lifting device 1 for a work machine according to the present embodiment, the first engagement member 7 is attached to the vertical member 2 by inserting a bolt into the elongated hole 12a of the first engagement member 7. Thereby, the attachment position of the 1st engaging member 7 with respect to the vertical member 2 can be adjusted to the direction orthogonal to the longitudinal direction of the vertical member 2. FIG. Similarly, by inserting a bolt into the elongated hole 14a of the second engagement member 8 and attaching the second engagement member 8 to the vertical member 2, the attachment position of the second engagement member 8 with respect to the vertical member 2 is set vertically. It can be adjusted in a direction perpendicular to the longitudinal direction of the member 2. And the raising / lowering apparatus in the state which can rotate the raising / lowering apparatus 1 by adjusting the attachment position of the 1st engagement member 7 with respect to the vertical member 2, and the attachment position of the 2nd engagement member 8 with respect to the vertical member 2, respectively. The inclination of 1 can be corrected. Thereby, since the inclination of the raising / lowering apparatus 1 at the time of rotation can be reduced, even if there is little amount which lifts the other vertical member 2 side when making the raising / lowering apparatus 1 a state which can be raised / lowered again, it can be locked. The second engaging member 8 can be easily engaged with the member 34. Therefore, it is possible to reduce the burden on the operator associated with the work for setting the lifting device 1 in a liftable state.

  In addition, the lifting device 1 tilts toward the center of gravity G during rotation. Therefore, by making the longitudinal direction of the long holes 12a, 14a parallel or substantially parallel to the direction from the upper part of the vertical member 2 toward the center of gravity G of the lifting device 1, the first engaging member 7 and the first The attachment position of the two engaging members 8 can be adjusted. Thereby, compared with adjusting an attachment position in parallel with the front-back direction and the left-right direction of the crane 20, the inclination of the raising / lowering apparatus 1 can be correct | amended suitably.

  Further, the first engagement member 7 is engaged with the shaft member 33 by fitting the cylindrical member 11 of the first engagement member 7 to the outer periphery of the cylindrical member 41 of the shaft member 33. If the cylindrical member 11 of the first engaging member 7 is fitted to the inner periphery of the cylindrical member 41, the fitting may be hindered by dust or rainwater collected inside the cylindrical member 41. On the other hand, by fitting the cylindrical member 11 of the first engaging member 7 on the outer periphery of the cylindrical member 41, both can be fitted without being affected by dust or rainwater collected inside the cylindrical member 41. it can.

  Further, the insertion member 13 of the second engagement member 8 is inserted into the locking member 34 from the horizontal direction, and the hole 44 a provided in the locking member 34, the hole 13 a provided in the insertion member 13, and the hole provided with the pipe 32. By penetrating the bar member 15, the second engagement member 8 is engaged with the locking member 34. Even when force is applied to the lifting device 1 in the vertical direction with the second engagement member 8 engaged with the locking member 34, the insertion member 13 is sandwiched in the vertical direction by the locking member 34. The insertion member 13 cannot be removed from the locking member 34. Even if a force is applied to the lifting device 1 in the horizontal direction, the insertion member 13 is not detached from the locking member 34 because the bar member 15 prohibits the movement of the insertion member 13 in the horizontal direction. Therefore, even when force is applied to the lifting device 1 from any direction, the engagement state between the second engagement member 8 and the locking member 34 can be reliably maintained.

  Further, the insertion member 13 can be easily inserted into the locking member 34 by guiding the insertion member 13 in the direction in which the insertion member 13 is inserted into the locking member 34 with the guide member 45.

  In addition, when the lifting device 1 is in a state of being rotatable about the shaft member 33, the rotation of the first engaging member 7 is restricted by the rotation restricting member 43, thereby turning the lifting device 1. Is regulated. Thereby, it is possible to prevent the lifting device 1 from colliding with the side surface of the upper body 24.

  In addition, the first engaging member 7 and the second engaging member 8 are shaped symmetrically with respect to the center plane parallel to the longitudinal direction of the vertical member 2, so that the first engaging member 7 and the second engaging member 8 are first with respect to the pair of vertical members 2. When the engaging member 7 and the second engaging member 8 are attached in reverse, the configuration in which the raising / lowering state and the turning state can be switched is maintained, and only the turning direction of the lifting / lowering device 1 can be reversed. . Thereby, the workability of the maintenance / inspection work can be improved.

[Second Embodiment]
(Elevating device for work machines)
Next, a lifting device (lifting device) 201 for a work machine according to a second embodiment of the present invention will be described. In addition, about the same component as the component mentioned above, the same reference number is attached | subjected and the description is abbreviate | omitted. The difference between the lifting device 201 of the present embodiment and the lifting device 1 of the first embodiment is that a third engagement member is removably attached instead of the second engagement member 8.

(Guard structure)
As shown in FIG. 9 which is a perspective view, a guard structure 35 is detachably attached to the upper surface of the upper body 24 with bolts. The guard structure 35 includes a pipe 32 similar to that of the first embodiment, a shaft member 33 similar to that of the first embodiment provided on one end side of the pipe 32, and an engagement provided on the other end side of the pipe 32. And a stop member 36. A third engagement member, which will be described later, is detachably engaged with the locking member 36. The guard structure 35 is shaped symmetrically in the horizontal direction about the axis of the pipe 32.

(Locking member)
The locking member 36 has a cylindrical tubular member 46 extending in the vertical direction and a plate-like plate member 47 facing in the vertical direction. The plate member 47 is fixed to the upper surface of the tubular member 46 by welding. On the upper surface of the plate-like member 47, a plate-like member of a third engagement member described later can be placed. The plate-like member 47 is provided with a hole 47a penetrating in the vertical direction. The hole 47 a communicates with the inside of the cylindrical member 46.

  The locking member 36 has a plate-like lock member 48 facing in the horizontal direction. The lock member 48 is disposed on the side surface of the plate-like member 47. The lock member 48 has a slit 48a extending in the horizontal direction from the side end toward the center. A pair of slits 48 a is provided symmetrically about the axis of the pipe 32.

  The locking member 36 has a bar member 49 bent into an L shape. The bar member 49 is connected to the pipe 32 by a wire (not shown). The plate-like member of the third engagement member is placed on the upper surface of the plate-like member 47, and the hole provided in the plate-like member of the third engagement member, and the hole 47a of the plate-like member 47, the lower part of the rod member 49 To penetrate. And the upper part of the bar member 49 extended in a horizontal direction is inserted in the slit 48a. As a result, the third engagement member is detachably engaged with the locking member 36.

(Third engaging member)
As shown in FIG. 10A which is a top view and FIG. 10B which is a side view, the third engagement member 9 has a plate-like plate member 17 facing in the vertical direction and a vertical direction on the side of the plate-like member 17. And a plate-like bracket 18 extending in the horizontal direction. The bracket 18 is provided with two elongated holes 18a through which bolts (fastening members) (not shown) are inserted with an interval in the vertical direction. The long hole 18a is a direction (horizontal direction) perpendicular to the longitudinal direction of the longitudinal member 2 so that the attachment position of the third engagement member 9 with respect to the longitudinal member 2 can be adjusted in a direction perpendicular to the longitudinal direction of the longitudinal member 2. Is the longitudinal direction.

  The bracket 18 is attached to the bracket 5 by a bolt inserted into the elongated hole 18 a of the bracket 18. Thereby, the 3rd engagement member 9 is attached to the other upper part of a pair of vertical member 2. FIG.

  Here, as shown in FIG. 4, the pair of brackets 5 of the handrail portion 4 are parallel or substantially parallel to a direction (arrow direction) from the lower portion 4 a of the handrail portion 4 toward the center of gravity G of the lifting device 201. It is attached to the lower part 4a. Therefore, the longitudinal direction of the long hole 18a of the bracket 18 attached to the bracket 5 is parallel or substantially parallel to the direction (arrow direction) from the lower part 4a of the handrail 4 toward the center of gravity of the lifting device 1.

  The plate-like member 17 is provided with a hole 17a penetrating in the vertical direction. The plate member 17 is placed on the upper surface of the plate member 47 of the locking member 36.

  As shown in FIG. 10A, the third engagement member 9 has a symmetrical shape with respect to a virtual line C (a central plane parallel to the longitudinal direction of the vertical member 2) passing through the center of the hole 17a and the center of the bracket 18. Has been. Therefore, even if the left and right sides of the third engagement member 9 are reversed, the function of the third engagement member 9 remains the same. Note that the third engagement member 9 is not only symmetrical with respect to the left and right but also vertically symmetrical with respect to the center plane perpendicular to the longitudinal direction of the longitudinal member 2. Therefore, even if the third engagement member 9 is turned upside down, the function of the third engagement member 9 remains the same.

(Engaged state)
In the above configuration, as shown in FIG. 11 which is an explanatory diagram, the plate-like member 17 of the third engagement member 9 is placed on the upper surface of the plate-like member 47 of the locking member 36. Next, the lower portion of the bar member 49 is passed through the hole 17 a provided in the plate-like member 17 of the third engagement member 9 and the hole 47 a of the plate-like member 47. And the upper part of the bar member 49 extended in a horizontal direction is inserted in the slit 48a. As a result, the third engagement member 9 is detachably engaged with the locking member 36. Note that FIG. 11 illustrates a case where the third engagement member 9 is attached to the bracket 5 on the left side (right side in FIG. 2) toward the upper body 24.

  Even when a force is applied to the elevating device 201 in the vertical direction with the third engagement member 9 engaged with the locking member 36, the plate-shaped member 17 is connected to the plate-shaped member 47 and the rod member 49 of the locking member 36. Therefore, the plate-like member 17 cannot be removed from the locking member 36. Even if a force is applied to the lifting device 201 in the horizontal direction, the plate member 17 is not detached from the locking member 36 because the bar member 49 prohibits the plate member 17 from moving in the horizontal direction. Therefore, even if force is applied to the lifting device 201 from any direction, the engagement state between the third engagement member 9 and the locking member 36 can be reliably maintained.

  When the first engaging member 7 engages with the shaft member 33 and the third engaging member 9 engages with the locking member 36, the elevating device 201 is in a state in which it cannot be rotated and can be raised and lowered. Become. On the other hand, when the first engaging member 7 is engaged with the shaft member 33 and the third engaging member 9 is not engaged with the locking member 36, the lifting device 201 has a horizontal direction centered on the shaft member 33. Can be rotated.

  In a state in which the lifting device 201 is rotatable, the lifting device 201 is inclined by its own weight during rotation, and the lower end of the other vertical member 2 that is not supported is lower than the lower end of the supported vertical member 2. It will be in the state located below. In order to make the lifting / lowering device 201 liftable again from this state, the operator lifts the other vertical member 2 side of the tilted lifting / lowering device 201 so that the lifting / lowering direction of the lifting / lowering device 201 is parallel to the vertical direction. Thus, the third engaging member 9 must be engaged with the locking member 36, which places a heavy burden on the operator.

  Therefore, in the present embodiment, the first engagement member 7 is attached to the bracket 5 of the lower portion 4a of the handrail portion 4 by inserting a bolt into the long hole 12a provided in the bracket 12 of the first engagement member 7. Adopted. Therefore, if the insertion position of the bolt with respect to the elongated hole 12a is adjusted, the attachment position of the first engagement member 7 with respect to the vertical member 2 can be adjusted in a direction orthogonal to the longitudinal direction of the vertical member 2. Similarly, a configuration is adopted in which a bolt is inserted into a long hole 18 a provided in the bracket 18 of the third engagement member 9 and the third engagement member 9 is attached to the bracket 5 of the lower portion 4 a of the handrail portion 4. . Therefore, if the insertion position of the bolt with respect to the long hole 18 a is adjusted, the attachment position of the third engagement member 9 with respect to the vertical member 2 can be adjusted in a direction orthogonal to the longitudinal direction of the vertical member 2.

  And in this embodiment, the raising / lowering apparatus 201 rotates by adjusting the attachment position of the 1st engagement member 7 with respect to the vertical member 2, and the attachment position of the 3rd engagement member 9 with respect to the vertical member 2, respectively. The tilt of the lifting device 201 in a possible state is corrected. Thereby, when the lifting / lowering device 201 is rotated, the tilt of the lifting / lowering device 201 can be reduced. Therefore, when the lifting / lowering device 201 can be lifted / lowered again, the amount of lifting the other vertical member 2 side is increased. Even if there is little, the 3rd engagement member 9 can be easily engaged with the latching member 36. FIG.

  In addition, the lifting device 201 is inclined toward the center of gravity during rotation, but the longitudinal direction of the elongated hole 12 a of the bracket 12 of the first engagement member 7 is the direction from the upper part of the vertical member 2 toward the center of gravity G of the lifting device 1. Parallel or almost parallel to (arrow direction). The longitudinal direction of the long hole 18a of the bracket 18 of the third engagement member 9 is parallel or substantially parallel to the direction (arrow direction) from the upper part of the vertical member 2 toward the center of gravity G of the lifting device 201. Therefore, the attachment positions of the first engagement member 7 and the third engagement member 9 can be adjusted with respect to the center of gravity G. Thereby, the inclination of the raising / lowering apparatus 201 can be correct | amended suitably.

  As shown in FIG. 9, the guard structure 35 has a horizontally symmetrical shape around the axis of the pipe 32. Furthermore, as shown in FIG. 10A, the third engagement member 9 has a symmetrical shape with respect to the imaginary line C. Therefore, when the guard structure 35 is attached to the upper body 24 with the left and right sides reversed, and the first engagement member 7 and the third engagement member 9 are attached to the pair of vertical members 2 in the reverse direction, It is possible to reverse only the rotation direction of the lifting device 201 without changing the rotation state. Thereby, the workability of the maintenance / inspection work can be improved.

  About another structure, it is the same as that of 1st Embodiment.

  The embodiment of the present invention has been described above, but only specific examples are illustrated, and the present invention is not particularly limited, and the specific configuration and the like can be appropriately changed in design. Further, the actions and effects described in the embodiments of the invention only list the most preferable actions and effects resulting from the present invention, and the actions and effects according to the present invention are described in the embodiments of the present invention. It is not limited to what was done.

DESCRIPTION OF SYMBOLS 1,201 Lifting device 2 Vertical member 3 Horizontal member 4 Handrail part 5 Bracket 6 Buffer member 7 1st engagement member 8 2nd engagement member 9 3rd engagement member 11 Cylindrical member 12 Bracket 12a Long hole 13 Insertion member 14 Bracket 14a Long hole 15 Bar member 15a Protruding part 16 Supporting member 16a Placement part 17 Plate-like member 18 Bracket 18a Long hole 20 Crane 21 Lower traveling body 22 Turning bearing 23 Upper turning body 24 Upper body 24a Door 25 Counterweight 27 Cab 31 Guard Structure 32 Pipe 33 Shaft member 34 Locking member 35 Guard structure 36 Locking member 41 Cylindrical member 42 Stopping member 43 Rotation restricting member 44 Plate member 44a Hole 45 Guide member 46 Cylindrical member 47 Plate member 47a Hole 48 Lock Member 48a Slit 49 Bar member

Claims (8)

A lifting device for a working machine, which is detachably provided on a working machine provided with an upper swing body on a lower traveling body, and is disposed on a side surface of the upper swing body to move up and down with respect to the upper portion of the upper swing body. In
A pair of left and right vertical members extending in the vertical direction;
A plurality of transverse members disposed between the pair of longitudinal members and spaced apart from each other in the vertical direction;
A first engagement member that is attached to one upper portion of the pair of vertical members with a fastening member and detachably engages with a shaft member provided on an upper surface of the upper swing body;
A second engagement member attached to the other upper part of the pair of vertical members by a fastening member and detachably engaged with a locking member provided on the upper surface of the upper swing body;
Have
The first engagement member and the second engagement member each have an elongated hole through which the fastening member is inserted,
Each of the elongated holes has a longitudinal direction in a direction perpendicular to the longitudinal direction of the longitudinal member,
The elevating device rotates horizontally around the shaft member when the first engagement member is engaged with the shaft member and the second engagement member is not engaged with the locking member. A lifting device for a working machine, wherein the lifting device is movable.   The lifting device in a state in which the lifting device is rotatable by adjusting the mounting position of the first engaging member with respect to the vertical member and the mounting position of the second engaging member with respect to the vertical member, respectively. The lifting device for a working machine according to claim 1, wherein the inclination of the working machine is corrected.   The elevating device for a work machine according to claim 1, wherein the elongated hole has a direction parallel to a direction from the upper portion of the vertical member toward the center of gravity of the elevating device as the longitudinal direction. The shaft member is cylindrical,
The elevating device for a work machine according to any one of claims 1 to 3, wherein the first engaging member includes a cylindrical member that fits on an outer periphery of the shaft member. The second engaging member is
An insertion member that is plate-shaped facing in the vertical direction, has a hole penetrating in the vertical direction, and can be inserted into the locking member from the horizontal direction;
In a state where the insertion member is inserted into the locking member, a rod member that can penetrate the hole provided in the locking member and the hole provided in the insertion member;
The elevating device for a work machine according to any one of claims 1 to 4, wherein:   The lifting device for a work machine according to claim 5, wherein the locking member includes a guide member that guides the insertion member in a direction in which the insertion member is inserted into the locking member.   The work according to claim 1, wherein the shaft member includes a rotation restricting member that restricts rotation of the first engaging member that engages with the shaft member. Machine lifting device.   The said 1st engaging member and the said 2nd engaging member are made into the left-right symmetric shape with respect to the center plane parallel to the longitudinal direction of the said vertical member, The any one of Claims 1-7 characterized by the above-mentioned. The lifting device for a work machine according to claim 1.

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