JP2007169013A - Lift device for work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lift device for work easily installable in and separable from a work part, and capable of efficiently performing work while moving over a wide range including an elevated spot position. <P>SOLUTION: This lift device for the work supports the whole via a receiving stage 104 arranged horizontally long in the required height. The lift device 10 for the work is characterized by having a vertically long base frame 12 arranged so as to be leaned against the receiving stage side 104 and suspended and supported by the receiving stage 104, a lift stage 14 vertically movably arranged to the base frame 12, a vertically moving means 16 vertically moving the lift stage 14 and a laterally moving means 18 laterally moving the base frame 14 in a state of being suspended and supported by the receiving stage 104. Thus, a worker on the lift stage 14 can perform the work while easily, vertically and laterally moving, and cost can be reduced by shortening a construction period by improving working efficiency. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a work lift device that can be used for work at high places, work in a large area, and the like, and can perform work while changing the position while the worker is riding.

For example, when building a large ship such as a passenger ship, a cargo ship, a container ship, or a tanker, a construction method called a block construction method is generally used from the viewpoint of work efficiency and safety. In the block construction method, the hull is divided into several blocks and manufactured at a factory or the like, the blocks are transported to a pedestal with a crane and assembled, and the joints between the blocks are welded. Since each block is provided with a size of several meters or more, a scaffold is required at the time of welding work at a high place. For example, a ladder, a stepladder, or a temporary scaffold (see, for example, Patent Document 1) or the like has been used as a conventional scaffold for working at high places.
JP 2003-105967 A

  Patent Document 1 discloses a temporary scaffold in which scaffolding plates are provided in a hierarchical manner in the vertical direction, the upper and lower scaffolding plates are connected by ladders, and hatches serving as entrances and exits from the ladders are provided on the respective scaffolding plates. However, in the temporary scaffold of Patent Document 1, the worker moves up and down using a ladder while holding equipment such as a welding apparatus, or performs a welding operation while moving horizontally on a narrow scaffold plate. Although it is carried out, the foot is unstable and the handling of long hoses and the like is complicated, so that the work efficiency is poor and the risk of accidents such as falling down of workers and tools is high. Furthermore, since it is necessary to assemble the temporary scaffolds one after another before joining the blocks and to remove them after the work, it took a lot of labor and time for the assembly and removal work. Especially when building a large ship, the size is large and the number of blocks is large, so the temporary scaffold is assembled and removed frequently, which causes a delay in the work period of the entire work. There is a growing demand for cost reduction.

  The present invention has been made in view of the above-described conventional problems, and one object of the present invention is that it can be easily installed and removed, and can be operated while moving over a wide range with only one installation. An object of the present invention is to provide a work lift device that can improve work efficiency at a high position, shorten the work period, and reduce the cost.

  In order to solve the above-described problems, the present invention provides a working lift device that is supported in its entirety through a receiving step (104) that is horizontally long at a required height, and is provided on the receiving side (104). A vertically long base frame 12 that is disposed so as to be suspended and supported by suspension in the receiving stage (104), a lift base 14 that is provided so as to be movable up and down with respect to the base frame 12, and the lift base 14 is moved up and down. And a vertical movement means 16 to be moved, and a horizontal movement means 18 to move the base frame 14 in the horizontal direction in a state of suspension support to the receiving stage (104). . The receiving step may be any one as long as it is formed in a step shape, for example, a member such as a flat plate member, H-shaped steel, L-shaped steel, C-shaped steel, work object or its The present invention can be applied to a structure in which a stepped portion, a protruding portion, or the like is formed in a part of a nearby structural portion or the like. Although it is particularly advantageous when the receiving stage is already installed at the work site, it is also possible to form a receiving stage for supporting the apparatus before the work. As the base frame 12, for example, a flat frame shape such as a vertically long rectangular frame shape is suitable without taking up any space. The base frame 12 may be configured as a three-dimensional frame in a vertically long rectangular parallelepiped shape. In addition, the base frame 12 may have an integral frame configuration, but may have a configuration in which the length can be extended as necessary, for example. The lift table 14 is preferably wide enough to allow the operator to mount equipment, tools and the like used for riding and work, and can work stably. Any other configuration may be used.

  The left-right moving means 18 is attached to the base frame 12 and is provided so as to be rotatable in the direction around the axis of the support shaft 24 provided from the base frame 12 toward the depth side which is the receiving stage (104) side. It is good to include the upper wheel 20 which rolls on the receiving stage (104) in the left-right direction. The form, such as a diameter and a width, of the upper wheel 20 is arbitrary, and includes various rolling members that move while rolling around the axis. Further, the number of the upper wheels 20 may be one or a plurality of two or more.

  Further, the receiving stage (104) includes a flat member (104) including the rolling surface of the upper wheel on the upper surface. When the device 10 moves in the left-right direction, the upper stage 20 cooperates with the upper wheel 20 to sandwich the upper wheel from above and below. At the time of detachment from the flat member (104), the lower wheel 22 that can release the device by releasing the clamping state may be provided so as to be able to roll. The form, such as a diameter and a width, of the lower wheel 22 is arbitrary, and includes various rolling members that roll while moving around the axis. Further, the number of the lower wheels 22 may be one or more than two, and the same number as the number of the upper wheels 20 or a different number may be provided.

  Further, when the apparatus 10 is arranged so as to lean on the flat member (104) side and the upper wheel 20 is placed on the flat member (104), the lower wheel 22 contacts the lower surface side of the flat member (104) from below. The flat member (104) is automatically held by the upper and lower wheels 20 and 22 in contact with each other, and when the device 10 is lifted from the lower side, the held state is released and the entire device can be removed from the flat member (104). An automatic clamping / releasing mechanism 34 may be provided.

  Moreover, the automatic clamping / release mechanism 34 may include a link portion 36 that links the base frame 12, the upper wheel 20, and the lower wheel 22 through a pantograph-like link.

  Further, the flat member (104) is provided on the front side with respect to the front-rear direction, and is provided with a vertical piece 108 bent downward in an L shape from the front end edge thereof. Auxiliary wheels 46 and 48 arranged around the vertical piece 108 so as to sandwich the vertical piece 108 of the flat member 104 and rotating about the vertical axis may be included.

  Moreover, while the upper wheel 20 consists of a large diameter wheel, the lower wheel 22 is good also as a small diameter wheel. That is, the diameter of the upper wheel 20 is set larger than the diameter of the lower wheel 22. For example, the lower wheel 22 is preferably lightweight because it moves from below to the lower surface side of the flat member. Moreover, since the upper wheel 20 receives the load of an apparatus, what has the high intensity | strength of a structure containing a wheel, a spindle, etc. is preferable.

  The vertical movement means 16 also includes a movable frame 50 that supports the lift base 14 while being slidably engaged in the longitudinal direction of the base frame 12, and a movable frame 50 that moves up and down relative to the base frame 12 by pulley / wire engagement. And a pulley and wire mechanism (58, 59, 60) that is movable in a telescopic manner. You may comprise the lift stand 14 so that attachment or detachment with respect to the movable frame 50 is possible. The movable frame 50 may be configured such that a plurality of frame members are slidable.

  Further, a drive winch 66 for winding and unwinding the wire 60 is arranged on the lift table 14 so that the movable frame 50 is moved up and down with respect to the base frame 14 by winding and unwinding the wire 60 from the lift table 14. It is also possible that

  In the pulley / wire mechanism, the pulleys 58 and 59 are spaced apart from each other at the upper and lower opposing positions of the movable frame 50, and the wire 60 is wound around the upper and lower pulleys 58 and 59, and the upper pulley 58 is pulled down. The lift table 14 may be connected to the wire 60 that has been removed.

  Further, the left / right moving means 18 may be provided with a left / right moving drive device that rotationally drives the upper wheel 20 by manual operation.

  According to the work lift device of the present invention, the work lift device is supported as a whole through a receiving step provided horizontally at a required height, and is arranged so as to lean on the receiving step side. A vertically long base frame suspended and supported by the receiving stage, a lift base provided so as to be vertically movable with respect to the base frame, a vertical moving means for moving the lift base up and down, and a suspension support state for the receiving stage Since the apparatus can be easily attached via, for example, a receiving stage, and the work position can be freely moved, the work position can be changed. The efficiency is improved, and it is possible to smoothly work with a small number of people even at a large work site in the vertical and horizontal directions, reducing work labor, shortening work time, and further reducing work costs. In particular, since the working lift device can freely move in the lateral direction at a portion where the receiving stages are continuously formed, it is possible to work over a wide range by simply attaching the apparatus once to the receiving stage. Therefore, the number of installation and removal operations of the apparatus at the work site can be reduced, and the attachment and removal operations can be easily performed, so that labor and time required for the operation can be greatly reduced. Further, since the lift table is moved to the base frame while the base frame is guided to the receiving stage, the stability when moving is good and can be moved safely.

  The left-right moving means is attached to the base frame and is provided so as to be rotatable about the axis of the support shaft provided from the base frame toward the depth side which is the receiving stage side. By including an upper wheel that rolls, a structure that can reliably support the base frame by placing the upper wheel on the receiving stage, and a structure that can move the wheel reliably and smoothly move left and right Can be implemented simultaneously. Furthermore, the device can be easily attached to and removed from the receiving stage.

  In addition, the receiving stage is made of a flat member including the rolling surface of the upper wheel on the upper surface, and is clamped from above and below in cooperation with the upper wheel when the device moves in the left-right direction, and is clamped when detached from the flat member of the device. The lower wheel that allows the device to be released by releasing the wheel is provided so as to be able to roll, so that the contact state between the wheel and the flat member is maintained to prevent slipping and separation of the wheel, Therefore, stability, certainty and safety can be ensured. In addition, the installation and removal configuration of the apparatus can be maintained.

  When the device is placed so as to lean on the flat member side and the upper wheel is placed on the flat member, the lower wheel comes into contact with the lower surface side of the flat member from below and the flat member is automatically clamped by the upper and lower wheels. The device is equipped with an automatic clamping release mechanism that releases the clamping state when the device is lifted from the lower side and allows the entire device to be removed from the flat member. Can be done. In addition, since the clamping state is released by the operation of lifting the device from the lower side, the clamping state is not released unexpectedly while using the device, and the supporting state of the device is reliably held, High safety.

  In addition, the automatic clamping / release mechanism includes a link part that links the base frame, upper wheel, and lower wheel via a pantograph-like link, thereby specifically configuring the automatic clamping / release mechanism with a simple and simple configuration. Can be manufactured at low cost.

  Further, the flat member is provided on the front side with respect to the front-rear direction, provided with a hanging piece bent downward in an L shape from the front end edge portion thereof, and the right and left moving means is a hanging member of the flat member. By including auxiliary wheels that are arranged before and after the drooping piece so as to sandwich the piece and rotate around the vertical axis, when moving and stopping using the dripping piece, the longitudinal direction of the upper wheel or the lower wheel Without causing side friction and disengagement, with only the wheel in contact with the flat member when moving left and right, without causing contact friction resistance between the base frame or other components and the flat member It can be moved smoothly.

  In addition, the upper wheel is composed of a large-diameter wheel, and the lower wheel is composed of a small-diameter wheel, so that the weight of the lower wheel can be reduced. For example, when the device is attached to a flat member, the lower wheel Can be smoothly moved upward so as to contact the lower surface side of the flat member, and the flat member can be securely held between the upper and lower wheels.

  The vertical movement means moves the movable frame up and down with respect to the base frame by engaging the movable frame that supports the lift base while being slidably engaged in the longitudinal direction of the base frame, and the pulley / wire engagement. By including the pulley and wire mechanism, for example, the vertical movement means can be realized with a simple configuration with relatively inexpensive parts and a small number of parts, and the manufacturing cost can be reduced. Furthermore, it is possible to ensure a long movement distance in the vertical direction of the lift table while maintaining the simple configuration.

  Also, a drive winch for winding and unwinding the wire is arranged on the lift table, and the movable frame is moved up and down with respect to the base frame by winding and unwinding the wire from the lift table. The movable frame can be moved up and down while freely rewinding, and the required vertical position can be held by the wire winding and holding force of the winch, so that the work can be performed stably and safely. In addition, for example, it is easy to attach a winch operation unit to a lift table, and an operator can perform a vertical movement operation on the lift table, so that workability is high and practicality is high.

  In the pulley / wire mechanism, the pulley is spaced apart from the upper and lower positions of the movable frame, the wire is wound around the upper and lower pulleys, and the lift base is connected to the wire pulled out like the upper pulley. Thus, the configuration in which the lift base is moved up and down with respect to the movable frame and the movable frame is vertically expanded and contracted with respect to the base frame can be specifically realized with a simple configuration.

  Further, since the left and right moving means is provided with the left and right moving drive device by rotating the upper wheel by manual operation, the drive means is provided in the device itself, for example, an operator gets on the lift table In this state, the upper wheel can be rotationally driven by the operator's own operation to move left and right, so that workability is good and practicality is high.

  The working lift device of the present invention will be described below with reference to the accompanying drawings. The working lift device of the present invention is supported through a receiving step that is horizontally long at a required height, and moves the operator up and down while using the receiving step. It is a lift device that can work over a wide range while moving it left and right. In the present embodiment, for example, an explanation will be given of an example applied to the construction of a large ship by a block construction method.

  For example, FIG. 10 shows a schematic structure of a part of a hull structure constructed by a block construction method. As shown in FIG. 10, a large ship is constructed by dividing a hull into several blocks and assembling those blocks. In the assembling work, work including joining the outer plates of the blocks 100, welding, polishing by blasting after welding, rust prevention, painting, etc. is performed. Such a working lift device 10 is applied. The block 100 is provided with an outer shell shape while a hollow space is formed by welding outer plates 102 made of a plurality of metal plates. On the inner side of the outer plate 102 is a metal stiffener such as a long material 104 having an L-shaped cross section, which is continuously arranged in the length direction of the ship when the block is assembled into a ship shape. It is integrally attached by welding. A plurality of the long materials 104 are provided at the required height of the outer plate, and project from the inner space side of the outer plate 102.

  1 to 9, in the present embodiment, the direction corresponding to the left-right direction in FIG. 1 (the direction perpendicular to the paper surface in FIG. 2) is the left-right direction X, and the direction corresponding to the left-right direction in FIG. 1 is the front-rear direction Y, the left side in FIG. 2 is the front side, and the right side is the rear side. The long material 104 protrudes from the outer plate 102 to the front side, Longer in the direction X. The vertical direction Z corresponds to the vertical direction in FIG. The longi material 104 is a flat horizontal piece 106 that protrudes horizontally from the outer plate to the front side, and a hanging piece 108 that is bent downward in an L shape from the protruding front end edge of the horizontal piece 106, have.

  In the present embodiment, the working lift device 10 is supported entirely on the front side of the outer plate 102 via the long material 104 with the long material 104 as a step. 1 to 9 show an embodiment of the working lift device of the present invention. In the present embodiment, as shown in FIGS. 1 to 7, the work lift device 10 includes a base frame 12, a lift table 14, a vertical movement means 16, and a horizontal movement means 18.

  In the present embodiment, the base frame 12 is a support body portion that is disposed so as to lean on the longi material 104 and is suspended and supported by the longi material 104. As shown in FIGS. 1 and 2, the base frame 12 is made of a vertically long frame body made of, for example, a metal such as aluminum or an alloy. In the present embodiment, the base frame 12 is assembled, for example, in a ladder shape, and a plurality of long members 121 that are long in the vertical direction and a plurality of members that are vertically connected to the vertical members 121 and integrally connected thereto. And a crosspiece member 122. In this embodiment, left and right moving means 18 is attached to the upper side of the base frame 12, and is suspended and supported on the longi material 104 via the left and right moving means 18.

  The left / right moving means 18 is a left / right moving means for moving the base frame 12 in the left-right direction while being supported by the longi material 104, and the left / right movement of the base frame 12 and the entire apparatus 10 along the longi material 104 that is horizontally long in the left / right direction. Realize movement in the direction. As shown in FIGS. 1, 3, and 4, in the present embodiment, the left and right moving means 18 has at least one rolling member such as a wheel that rolls while contacting the longi material 102. It is made up of a wheel-driven travel mechanism that can move along the laterally long longitudinal material 104 by applying a drive rotation to the left and right. Specifically, in this embodiment, the traveling mechanism includes an upper wheel 20 that rolls with the upper surface side of the longe material 104 as a rolling surface, and the longe material 104 that sandwiches the upper wheel 20 and the longe material 104 from above and below. And a lower wheel 22 disposed on the lower side and provided to be freely rollable.

  The upper wheel 20 is provided so as to be rotatable in the direction around the axis of the support shaft 24 provided on the depth side from the base frame 12 on the longi material 104 side (rearward side in the figure). In the form, it is attached to the base frame 12 via the upper support 26. The upper wheel 20 is placed on the upper surface side of the horizontal piece 106 of the longi material 104 when the base frame 12 is disposed so as to lean on the longi material 104 side. Support. That is, the upper wheel 20 is placed on the upper surface side of the longi material 104 so that the base frame 12 is supported by the longi material 104, and the upper wheel 20 rolls on the upper surface side of the longi material in that state. And a configuration for moving the right and left at the same time. In the present embodiment, the upper wheel 20 is composed of, for example, a large-diameter wheel having a large diameter, and a high-friction rubber tire or the like is formed on the circumferential surface side that contacts the upper surface side of the long material 104. The upper support body 26 that supports the upper wheel 20 is formed of a hollow bowl-shaped member that is long in the left-right direction, and is disposed on the rear side of the base frame 12 so as to be orthogonal to the base frame 12. It is connected to the base frame 12 via a clamping / release mechanism. The upper wheels 20 are pivotally supported on both left and right ends of the upper wheel support 24 with the support shafts 24 penetrating and supported in the front-rear direction Y, and one upper wheel 20 is disposed on each of the left and right sides of the base frame 12. The base frame portion is disposed near the base frame at a position protruding rearward from the base frame portion. Therefore, when the base frame 12 is disposed so as to lean on the front side of the longi material 104, the upper wheel 20 is placed on the upper surface side of the longi material 104, so that the base frame 12 is placed on the front side of the longi material 104. It is supported by hanging.

  Furthermore, the upper wheel 20 is a drive wheel that is rotationally driven by a rotational drive operation to move left and right, and constitutes a left-right movement drive device. In this embodiment, a handle 28 is linked to the upper wheel 20 on the right side in FIG. 3, and the upper wheel 20 is driven to rotate around the support shaft 24 by a manual rotation operation of the handle 28. Further, the two upper wheels 20 are synchronously driven and rotated by a linkage device disposed inside the hollow of the upper support 26. The linkage device includes, for example, gears (not shown) fixed to the respective support shafts 24 and an endless chain 30 wound around these gears. The driving force on the upper wheel side that is linked to is transmitted to the other upper wheel side to rotate synchronously. In the present embodiment, the upper wheel 20 and the handle 28 are gear-connected via a speed reducer constituted by a plurality of gears (not shown) and the like, and the upper wheel 20 and the handle 28 can be smoothly operated by a handle operation with a small force. The wheel can be moved by rotating it. With this configuration, since the driving means is provided in the apparatus itself, it is not necessary to operate from the outside, and the operator can move the lift table 14 left and right by the left and right moving means. Further, even in a state where a certain amount of heavy load including the entire apparatus and the worker is applied to the upper wheel 20, the movement in the left-right direction can be performed smoothly. Further, since the upper wheel 20 is a large-diameter wheel and is provided with high friction, the moving distance is long even at a relatively low rotational speed, and it can be driven and rotated while preventing slipping, and the left and right movement can be performed stably and reliably. Can be done. The configuration for driving and rotating the upper wheel 20 may be driven by using an automatic rotation driving device such as an electric or pneumatic motor, for example. It is preferable to be able to do so.

  As shown in FIGS. 1, 3, and 4, the lower wheel 22 is disposed in contact with the lower surface side of the horizontal piece 106 of the long material 104 when the base frame 12 is supported by the long material 104. 20 is a second rolling member that cooperates with 20 to clamp the longi material 104 from above and below. In the present embodiment, unlike the upper wheel, the lower wheel 22 is not for generating a driving force, but reduces the running resistance in the pinched state. Basically, the configuration of the upper wheel 22 configured as a driving device may be used as the left / right moving means. However, by adopting a configuration in which the long wheel 104 is sandwiched between the upper wheel 20 and the lower wheel 22, While maintaining the contact state with the material to prevent the wheel from slipping or detaching from the longi material, the driving rotational force can be surely made the lateral movement force, stability, reliability, safety Can be secured. In the present embodiment, the lower wheel 22 is composed of, for example, a small-diameter wheel having a smaller diameter compared to the upper wheel 20, and two lower wheels 22 are arranged so as to face the upper wheel 20 in the vertical direction. Attached to the base frame 12. In the present embodiment, the upper wheel support 32 that supports the lower wheel 22 is formed of a hook-like member that is long in the left-right direction, and is behind the base frame 12 and behind the hanging piece 108 of the longi material 104. It is arranged on the side so as to be orthogonal to the base frame 12, and is connected to the base frame 12 via an automatic clamping / release mechanism described later. The lower wheel 22 is disposed on the upper side of the left and right end portions of the lower support 32 and is rotatably supported with the support shaft directed in the front-rear direction Y. The lower wheel may be a drive wheel, or may be configured to be driven and rotated while being synchronized with the upper wheel.

  In the present embodiment, as shown in FIGS. 1, 3, and 4, an automatic clamping / releasing mechanism 34 is provided. The automatic clamping / release mechanism 34 automatically holds the Longi material 104 between the upper wheel 20 and the lower wheel 22 when the working lift device 10 is supported by the Longi material, and the device is the Longi material. This means is a clamping / releasing means that allows the device to be removed by releasing the clamping state by lifting the lower side of the base frame when it is detached from 104. Furthermore, in this embodiment, the upper support body 26 and the base frame 12, and the lower support body 32 and the base frame 12 are connected by the automatic clamping / release mechanism 34. In the present embodiment, the automatic clamping / releasing mechanism 34 includes an upper support 26 that supports the upper wheel 20 and a lower support 32 that supports the lower wheel 22 that slide in the vertical direction Z with respect to the base frame 12. On the other hand, a link portion 36 is provided that is configured to be close to and away from each other and links the upper support 26, the lower support 32, and the base frame 12.

  As shown in FIGS. 3 and 5, a guide portion 38 that guides movement in the vertical direction while being slidably engaged with the vertically long member 121 of the base frame 12 is fixed to the upper support 26. The guide portion 38 is composed of a pair of left and right U-shaped plate members that are U-shaped in cross section and are provided to a certain extent in the vertical direction. The U-shaped opening side faces inward, and the vertical member 121 is formed from both outer sides of the base frame 12. It is slidably contacted. In FIG. 5, the portions of the base frame 12 and the upper support 26 are mainly shown for explanation, and other portions are partially omitted. Further, similarly to the upper support 26, a guide portion 39 made of a pair of left and right U-shaped plate members having a U-shaped cross section is fixed to the lower support 32, and the lower support is supported via the guide portion 39. The body 32 is guided to move in the vertical direction Z with respect to the base frame 12.

  As shown in FIGS. 3 and 6, in the present embodiment, the link portion 36 is configured by a four-bar linkage mechanism that is pivotally connected at four apex portions in a pantograph shape and deformed into a parallelogram shape. Specifically, the upper pivotal support portion 40 a of the link portion 36 is pivotally fixed at the approximate center of the plate member 42 that is fixed between the vertically long members 121 of the base frame 12. The lower pivotal support portion 40 b of the link portion 36 is pivotally fixed to the upper end side of the vertical piece member 43 that is integrally fixed to the center of the lower support body 32. Further, the left and right pivotal support portions 40c and 40d of the link portion 36 are set to the left and right with respect to the guide rod 44 (see FIG. 5) integrally attached at a position corresponding to the position between the longitudinal members 121 of the base frame 12 of the upper support 26. It is slidably connected in the direction. Therefore, the link portion 36 connects to the base frame 12 of the upper support body 26 and the lower support body 32, and the sliding range of the upper support body 26 and the lower support body 32 is regulated. Further, the vertical separation width between the upper wheel 20 and the lower wheel 22 is set to be larger than the vertical length of the hanging piece 108 of the longi material 104.

  By configuring the link portion 36 in this way, the upper support body 26, the lower support body 32, and the base frame 12 are linked, so that the upper wheel 20 and the lower wheel 22 are brought close to and away from each other by the operation of the base frame 12. In addition, the long material can be easily sandwiched and detached. For example, as shown in FIG. 6, when attaching the base frame 12 to the longi material 104, first, the upper wheel 20 and the lower wheel 22 are separated from each other. Then, when the base frame 12 is leaned toward the longi material 104 and the upper wheel 20 is placed on the longi material 104, the base frame 12 moves downward relative to the upper support 26 by its own weight. At this time, the link portion 36 is moved from the vertically long rhombus shape to the upper pivotal support portion 40a pivotally fixed to the base frame 12 so that the left and right pivotal support portions 40c and 40d are moved to the guide rod 44 of the upper support 26. The lower pivotal support portion 40b is lifted and moved upward while being separated to the left and right outside, and deformed into a horizontally long rhombus shape. As a result, as shown in FIG. 3, the lower support 32 slides upward with respect to the base frame 12, and the lower wheel 22 is brought into contact with the lower surface side of the longi material 104 from below so that the upper and lower wheels 20, 22, the long material 104 is automatically held. In the present embodiment, since the lower wheel 22 is a small-diameter wheel having a relatively small diameter, the lower wheel 22 has a relatively light-weight structure, so that the lower wheel 22 side, that is, the upper side of the lower support body 32 is used. Can move smoothly and reliably. Moreover, since the link part 36 is provided so that the upper wheel 20 and the lower wheel 22 may clamp a longi material using the load to the downward side of a base frame, it is clamped while using an apparatus. It can always be held and the pinched state can be prevented from being released unexpectedly.

  On the other hand, when the base frame 12 is detached from the longi material 104, the base frame 12 is lifted from the lower side of the base frame 12 and moved upward with respect to the upper wheel 20. At that time, the link portion 36 is moved from the horizontally long rhombus shape to the upper pivotal support portion 40a pivotally fixed to the base frame 12 so that the left and right pivotal support portions 40c and 40d are moved to the guide rod 44 of the upper support 26. The lower pivotal support portion 40b moves downward while being brought close to the center side along, and is deformed into a vertically long rhombus shape. As a result, as shown in FIG. 6, the lower support 32 slides downward relative to the base frame 12 to release the clamping state, and the entire apparatus can be detached from the longi material 104. Therefore, an automatic clamping / release mechanism can be realized by a simple structure by the link portion 36, and can be manufactured at low cost. Note that the sandwiching and separating structure of the upper wheel and the lower wheel may be configured by other slider mechanisms such as an electric motor and a cylinder mechanism, for example.

  Further, as shown in FIGS. 3 and 4, the left and right moving means 18 includes auxiliary wheels 46 that are arranged in front of and behind the hanging piece 104 so as to sandwich the hanging piece 108 of the longi material 104 and rotate around the vertical axis, 48 is provided. The auxiliary wheels 46 and 48 use the long piece 108 of the longi material provided in an L shape to prevent the upper wheel 20 and the lower wheel 22 sandwiching the longi material from shifting in the front-rear direction Y side. Further, for example, even when a moment around the wheel mounting position of the base frame 12 suspended on the longi material by the upper wheel 20 acts, the base frame 12 or other components and the longi material when moving in the left-right direction. It functions as a guide roller that smoothly moves in the left-right direction X without causing contact frictional resistance with 104. That is, the reliability and stability of the support state of the base frame 12 including when moving in the left-right direction are improved. In the figure, the front auxiliary wheels 46 are arranged on both the left and right outer sides of the base frame 12, and are rotated around the vertical axis in the vertical direction at a position from the rear on the lower side of the guide portion 38 fixed to the upper support 26. It is attached movably. Further, the front auxiliary wheel 46 is disposed at a position slightly ahead of the position of the upper wheel 20 and is in contact with the front surface side of the long piece 108. The rear auxiliary wheel 48 is disposed opposite to the rear auxiliary wheel 46 so as to sandwich the hanging piece 108 and is rotatable about a vertical axis in the vertical direction fixed to the upper surface side of the lower support body 32. Is attached. In the present embodiment, the front-rear wheel 46 and the rear auxiliary wheel 48 have a separation width in the front-rear direction that is substantially the same as or slightly larger than the thickness of the long piece 108. Furthermore, in this embodiment, as shown in FIGS. 3 and 6, the upper support body 26 and the lower support body 32 approach and separate from each other, so that the front auxiliary wheel 46 and the rear auxiliary wheel 48 move in the vertical direction. Thus, the arrangement and detachment of the longi material 104 before and after the hanging piece 108 are changed by being separated from each other. In other words, the arrangement and separation of the front auxiliary wheel 46 and the rear auxiliary wheel 48 in the front-rear direction of the longi material hanging piece 108 is performed by holding the longi material 104 (the horizontal piece 106) between the upper wheel and the lower wheel. It is interlocked with the release operation, and can be easily performed without hindering the attaching operation by the upper and lower wheels or the removing operation after releasing the pinched state.

  As shown in FIG. 2, the lift table 14 is a table on which, for example, an operator, a work tool, or the like is placed, and is provided so as to be movable up and down with respect to the base frame 12 via the vertical movement means 16. As shown in FIG. 2, the lift base 14 has a metal base plate 14 a having a substantially flat surface on the upper surface side, and the space on the base plate is three-dimensionally supported while supporting the base plate. A metal frame 14b is assembled so as to surround the frame. An operator on the lift table 14 can perform work such as welding and blasting in a stable state using a flat base plate as a scaffold, and can work safely because it is surrounded by a frame. The lift table 14 is disposed on the front side of the base frame 12, that is, on the side opposite to the side on which the left and right moving means is provided. An attachment frame 14c is integrally provided on the base frame 12 side of the frame 14b of the lift base 14, and is attached to a rail portion 56 of the movable frame 50 described later via the attachment portion 14c.

  The vertical movement means 16 is a vertical movement means for the lift base 14 that moves the lift base 14 up and down relative to the base frame 12. As shown in FIGS. 1 and 2, in the present embodiment, the vertical movement means 16 includes a movable frame 50 and a pulley / wire mechanism. As shown in FIG. 7, the movable frame 50 supports the lift table 14 while being slidably engaged in the longitudinal direction of the base frame 12. The movable frame 50 has, for example, a vertically long integrated frame structure made of a metal or an alloy such as aluminum and assembled in a ladder shape, and a pair of vertically long members 501 that are long in the vertical direction, and the vertically long member 501 And a plurality of crosspiece members 502 that are installed perpendicularly and connected together. The movable frame 50 is provided slightly smaller than the base frame 12, and is disposed on the front side of the base frame 12 in a superposed manner and between the vertically long members 121. The movable frame 50 slides and guides the vertically long member 501 to the first engagement portion 52 having a U-shaped frame fixed to the upper end side of the vertically long member 121 of the base frame 12, and the engagement position is set in the vertical direction Z. While being changed, it can slide up and down to move freely. Further, a second engaging portion 54 that is protruded toward the base frame 12 and slidably engages with the vertically long member 121 of the base frame is fixed to the lower end side of the vertically long member 501 of the movable frame 50. When the movable frame slides, the guide function of the movable frame 50 with respect to the base frame 12 is configured in cooperation with the first engaging portion 52 fixed to the base frame. Further, the movable frame 50 supports the lift table 14 so as to be slidable in the vertical direction Z with respect to the movable frame 50. In the present embodiment, the movable frame 50 extends along the longitudinal direction (vertical direction Z) of the movable frame 50. A long rail portion 56 is provided. The rail portion 56 is arranged slightly forward from the frame main body portion of the movable frame 50, and is configured by fixing a pair of rail members facing left and right. The lift table 14 is slidably attached to the rail portion 56. Therefore, as shown in FIG. 9, the lift base 14 is configured to move up and down relative to the movable frame 50, and the movable frame 50 moves up and down relative to the base frame 12. That is, the movement distance of the lift base 14 in the vertical direction is equal to the slide movement distance H1 of the lift base 14 relative to the movable frame 50 + the slide movement distance H2 of the movable frame 50 relative to the base frame 12. Thereby, the movement distance to an up-down direction is long and can secure a wide working range. In addition, when attaching / removing the work lift device 10 to / from the longi material, carrying or storing the work lift device 10, the device is relatively compact with the movable frame superimposed on the base frame. And can.

  As shown in FIG. 2, the pulley / wire mechanism includes pulleys 58 and 59 and a wire 60 hung on the pulley, and the movable frame 50 is moved up and down with respect to the base frame 12 by the pulley / wire engagement. Move to retractable. Furthermore, in the present embodiment, the pulley / wire mechanism is a moving means for the movable frame 50 relative to the base frame 12, and at the same time, the movable frame of the lift table 14 that moves the lift table 14 up and down along the rail portion 56 of the movable frame 50. 50 is a moving means. In FIG. 2, the pulley / wire mechanism has an upper pulley 58 and a lower pulley 59 that are spaced apart from each other at a vertically opposed position of the movable frame 50. The upper pulley 58 and the lower pulley 59 are arranged so as to be shifted in the front-rear direction Y. More specifically, the upper pulley 58 is pivotally supported on the upper side of the rail portion 56 disposed on the front side of the movable frame 50 so that the support shaft 58a can turn in the left-right direction X. The lower pulley 59 is pivotally supported on the lower end side of the frame main body portion of the movable frame 50 so that the support shaft 59a can turn in the left-right direction X.

  On these upper and lower pulleys 58 and 59, a wire 60 is wound in a substantially N shape. The lift 60 is connected to the end of the wire 60 that is drawn downward from the upper pulley 58 to the front side, and the wire 60 is drawn upward from the other lower pulley 59 on the rear side (base frame 12 side). The end on this side is connected to the base frame 12. The wire 60 and the base frame 12 are connected to each other via a connecting device such as a shackle 64 in a hole of a fixed plate 62 fixed at a position from the upper end side in the middle in the vertical direction of the base frame 12. The wire 60 and the lift table 14 are connected to each other by a winch 66 disposed below the base plate of the lift table 14, and the wire 60 supports the lift table 14 in a suspended manner. The winch 66 is a drive winch for winding and unwinding the wire 60. The winch 66 is configured such that its winding body 66a is rotatably supported about a horizontal axis, and the wire 60 is moved while the lift base 14 is moved upward with respect to the base frame 12 by the winding of the wire 60. As a result of the rewinding, the lift table 14 is moved downward with respect to the base frame 12, and the rotation stop state is maintained and the stop state of the lift table 14 is maintained. In the present embodiment, the winch 66 is composed of, for example, a pneumatic winch that drives the winding body 66a by an air motor 66b or the like, and is connected to a compressor or the like by an air hose (not shown), and the air pressure pumped from the air compressor is used as a power source. Rotate forward and backward to stop. Further, an operation unit for driving the winch is provided on the upper end side of the frame 14b of the lift table 14. In the present embodiment, the operation unit includes, for example, operation buttons 68a and 68b connected to the winch 66 via an air hose or the like, and the valve on the air motor side is opened and closed by operating any one of the operation buttons 68a and 68b. Thus, the winch can be rotated forward and backward and stopped. As a result, the operator can move up and down while riding on the lift platform. Note that the winch 66 is not limited to a pneumatic type using an air motor, but may be an arbitrary winding configuration such as an electric type, a hydraulic type, an engine type, or a manual type. Further, it is preferable that the air hose connected to the winch is branched by a lift base so that, for example, work equipment such as a pneumatic drive blasting device and other pneumatic drive tools can be connected.

  More specifically, the pulley / wire mechanism (58, 59, 60) is configured as described above, so that the lift disposed on the lower side of the working lift device 10 as shown in FIG. When the base 12 (two-dotted line in FIG. 9) is moved upward with respect to the base frame 12, the pulley 58 is wound by rotating the winch 66 disposed on the lift base 14 to wind the wire 60. , 59 as a fixed pulley, the lift base 14 slides along the rail portion 56 of the movable frame 50 while shortening the portion of the wire 60 that is drawn down from the upper pulley 58 in a hanging manner. During this time, the lift base 14 can be stopped at an arbitrary sliding position, and is suspended and supported by the wire 60 and the winch 66. When the lift base 14 moves to the upper end side of the rail portion, the lift base 12 is engaged with the movable frame 50 in a locking manner. Then, when the wire 60 is further wound by the winch 66 in the latched engagement state, the lower pulley 59 is moved while the wire 60 lifts the lower pulley 59 side like a moving pulley as shown in FIG. 9B. The portion drawn from the base frame 12 to the fixed plate 62 side is shortened, and the movable frame 50 moves so as to extend upward with respect to the base frame 12. Therefore, the lift base 14 moves upward with respect to the base frame while being locked to the upper end side of the movable frame 50. Even while the movable frame 50 is moved, the lift table 14 (movable frame 50) can be stopped at an arbitrary slide position, and the position is held by the wire 60 and the winch 66. Further, when the lift table 12 is moved downward, the above is reversed, and the wire 60 is unwound from the winch 66 and moved downward by the weight of the movable frame 50 or the weight of the lift table 14. Note that the vertical movement means 18 may be configured without the movable frame 50, for example, by engaging the lift base 12 with a pulley and a wire so as to move up and down with respect to the base frame 12. Further, the vertical movement means is not limited to the above-described ones. For example, an expansion / contraction cylinder mechanism, a chain / sprocket mechanism, a pulley / belt mechanism, a bolt shaft that rotates around an axis, and a rotation shaft mechanism that reciprocates with respect to the bolt shaft Any other vertical movement configuration may be used. However, when the pulley / wire mechanism is used as in the present embodiment, for example, it is possible to reduce the manufacturing cost by using a relatively inexpensive component and a simple configuration with a small number of components, while maintaining the simple configuration. This is advantageous in that a long moving distance of the lift table can be secured.

  Further, in the present embodiment, as shown in FIG. 2, a protruding saddle member 72 projects from the base frame 12 toward the rear side on the lower side of the base frame 12. A caster 72 that rotates freely around the vertical axis while abutting the outer plate 102 is provided on the distal end side of the 70. The caster 72 supports the lower lift side of the base frame 12 against the force that the lower side of the base frame 12 faces rearward by a moment around the support position in a state where the working lift device 10 is attached to the longi material 104. The running resistance when moving in the left-right direction is reduced. As a result, the base frame 12 is held in a substantially vertical suspended state to increase the safety of the apparatus, and the upper wheel 20, the lower wheel 22, or the auxiliary wheel is maintained in contact with the longi material, Improve the certainty of support and lateral movement.

  Next, the operation of the work lift device 10 according to the present embodiment will be described. For example, in the operation of joining the joints between the blocks 100 of a large ship as shown in FIG. 10, the work lift device 10 is supported by the longi material 104 near the joints of the block 100 via the longi material 104. . When the working lift device 10 is supported, for example, as shown in FIG. 6, the upper wheel 20 and the lower wheel 22 are previously separated via a link portion 36. In a state where the longitudinal direction of the base frame 12 is directed up and down, the lower side of the base frame 12 is lifted, and the base frame 12 is disposed so as to lean against the longi material from the front side, Wheel 20 is placed on the longi material. Then, when the lifted state of the base frame 12 is released slowly (or when a force is applied downward as necessary), the base frame 12 moves downward with respect to the upper wheel 20. At this time, the lower wheel 22 side automatically moves upward via the link portion 36, and as shown in FIGS. 3 and 4, the lower wheel 22 comes into contact with the lower surface side of the longi material 104 so that the upper, lower The horizontal piece 106 of the longi material 104 is clamped by the wheels 20 and 22. At the same time, the front and rear auxiliary wheels 49 and 48 are in a state of sandwiching the hanging piece 108 of the longi material 104. In this way, as shown in FIGS. 1 and 2, the working lift device 10 is suspended and supported on the longi material while being engaged with the longi material on the upper side of the base frame 12. The As a result, the operation of attaching the work link device 10 can be performed easily and in a short time with little effort. When performing work such as welding or blast polishing of the joint portion of the block, the operator gets on the lift base 14 and rotates the winch 66 with an operation button, for example, as shown in FIGS. Then, the wire is wound and unwound, and the lift base 14 is moved in the vertical direction Z with respect to the base frame 12 and moved to a required height. Further, as shown in FIG. 8, the upper wheel 20 is rotationally driven through the handle 28 to move the base frame 12 in the left-right direction X along the longi material while being supported by the longi material 104. Is moved left and right. In the present embodiment, since the handle 28 is disposed on the upper wheel 20 portion that is placed on the upper side of the longe material 104, when operating the handle, the lift table 14 is moved via the vertical movement means 16. It is performed after moving to the vicinity of the position. In this way, the operator can perform welding or the like at an arbitrary position while moving in the vertical direction Z by the vertical movement means 16 or the horizontal direction X by the horizontal movement means 18 as necessary while riding on the work lift device 10. Can be done. Therefore, the work efficiency is improved. For example, even a wide range of work such as block joining work in the construction of large ships can be carried out smoothly with a small number of people, reducing work labor, shortening work time, and working cost. Can be reduced. In particular, since the working lift device can freely move in a portion where the longi material 104 is continuous, it is possible to work over a wide range only by attaching the device once to the longi material. Therefore, compared with a conventional temporary scaffold, the number of installation and removal operations of the device at the work site can be reduced, and the labor and time required for the operation can be greatly reduced. Furthermore, since the welding apparatus and the blasting apparatus can be moved up and down or left and right while being on a stable lift, the stability and safety at the time of operation and movement are high. On the other hand, when the work lift device 10 is removed from the longi material 104 after the work, when the lift device 10 is lifted from the lower side of the base frame 12, the lower wheel 22 side automatically moves downward via the link portion 36 and is sandwiched. And the entire device can be removed. Thereby, the removal operation of the work link device 10 can be performed easily and in a short time. Therefore, the workability of the entire work is good, the work can be saved, and the work time can be shortened.

  The working lift device of the present invention described above is not limited to the above-described embodiment, and may be arbitrarily modified without departing from the essence of the present invention described in the claims. .

  The working lift device of the present invention is used for construction, repair, inspection, maintenance, etc. of structures such as large ships such as passenger ships, cargo ships, container ships and tankers, or civil engineering and buildings such as high-rise buildings and bridges. Applicable to various work including. In particular, it is advantageous when a receiving stage for supporting the work lift device is already installed at the work site.

It is a front view of the lift apparatus for work which concerns on embodiment of this invention. It is the sectional view on the AA line of the working lift apparatus of FIG. It is an enlarged view of the upper part side of FIG. It is the enlarged view which abbreviate | omitted a part of BB line cross section. It is the enlarged view which a part of CC section was omitted. It is explanatory drawing which shows the cancellation | release state of the clamping state of FIG. It is explanatory drawing which a part of DD sectional view of FIG. 3 was abbreviate | omitted. FIG. 2 is a schematic operation explanatory diagram in a front view of the working lift device of FIG. 1. FIG. 2 is a schematic action explanatory diagram in a side view of the working lift device of FIG. 1. It is a hull structure explanatory drawing of a part of the large sized ship constructed | assembled by the block method used as the example of an application scene of the work lift apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work lift apparatus 12 Base frame 14 Lift stand 16 Vertical movement means 18 Left-right movement means 20 Upper wheel 22 Lower wheel 34 Automatic clamping / release mechanism 36 Link part 46,48 Auxiliary wheel 50 Movable frame 58,59 Upper pulley, Lower pulley 60 Wire 66 winch

Claims (11)

It is a working lift device that is supported in its entirety through a receiving step provided horizontally at a required height,
A vertically long base frame that is arranged so as to lean on the receiving stage side and is suspended and supported by the receiving stage;
A lift base provided to be movable up and down with respect to the base frame;
A vertical movement means for moving the lift table up and down;
A working lift device comprising: a left-right moving means for moving the base frame in the left-right direction in a state of suspension support to the receiving stage.   The left / right moving means is attached to the base frame and is provided so as to be rotatable about the axis of the support shaft provided from the base frame toward the depth side which is the receiving stage side, and rolls on the receiving stage in the left / right direction. The working lift device according to claim 1, comprising an upper wheel. The receiving stage is composed of a flat member including the rolling surface of the upper wheel on the upper surface,
When the device moves in the left-right direction, it is clamped from above and below in cooperation with the upper wheel, and when the device is detached from the flat member, a lower wheel that allows the device to be removed by releasing the clamping state is provided to be able to roll. The working lift device according to claim 2.   When the device is placed so as to lean on the flat member side and the upper wheel is placed on the flat member, the lower wheel comes into contact with the lower surface side of the flat member from below and the flat member is automatically clamped by the upper and lower wheels. 4. The working lift device according to claim 3, further comprising an automatic clamping / releasing mechanism that releases the clamping state when the device is lifted from the lower side and makes the entire device removable from the flat member.   5. The work lift device according to claim 4, wherein the automatic clamping / release mechanism includes a link portion that links the base frame, the upper wheel, and the lower wheel via a pantograph-like link. The flat member is provided on the front side with respect to the front-rear direction, and a drooping piece bent downward in an L shape from the front edge is provided.
The left-right moving means includes auxiliary wheels that are arranged in front of and behind the hanging piece so as to sandwich the hanging piece of the flat member and rotate around the vertical axis. Lifting device for work.   The working lift device according to any one of claims 3 to 6, wherein the upper wheel is a large-diameter wheel and the lower wheel is a small-diameter wheel. The vertical movement means is a movable frame that supports the lift table while slidably engaging in the longitudinal direction of the base frame;
The work lift device according to any one of claims 1 to 7, further comprising: a pulley and wire mechanism that moves the movable frame up and down freely with respect to the base frame by pulley and wire engagement. A drive winch for winding and unwinding wires is placed on the lift table,
9. The working lift device according to claim 8, wherein the movable frame is moved up and down with respect to the base frame by winding and unwinding the wire from the lift table. In the pulley / wire mechanism, the pulley is spaced apart from the upper and lower positions of the movable frame, and the wire is wound around the upper and lower pulleys.
10. The work lift device according to claim 9, wherein a lift base is connected to the wire drawn out in a hanging shape of the upper pulley. The working lift device according to any one of claims 2 to 10, wherein the left-right moving means is provided with a left-right moving drive device that rotationally drives the upper wheel by manual operation.

Images