JP5874999B2 - Lifting scaffolding device - Google Patents

Description

  The present invention relates to a lifting and lowering scaffold device that can be used for a temporary scaffolding laid in, for example, a building such as a building, and in particular, a work floor can be moved up and down.

  Conventionally, a temporary scaffold is provided along a building in a construction work such as a building, and has a work floor for an operator to perform work. In recent years, an elevating type scaffolding device in which a work floor can be moved up and down in the vertical direction has been proposed (see, for example, Patent Document 1).

Japanese Patent No. 2881677

  As shown in FIG. 8 (a), for example, the lifting and lowering scaffold apparatus has two towers 71 and 72, and the tower portion 73 having a work floor is connected to the towers 71 and 72. What raises and lowers this scaffold part 73 is known.

  That is, in this lifting type scaffolding device, for example, two towers 71 and 72 are juxtaposed at a predetermined interval on the ground G on which the building is erected, and the towers 71 and 72 are vertically arranged along the towers 71 and 72. Two elevating parts 74 and 75 capable of elevating are provided. A scaffold part 73 is connected to the elevating parts 74 and 75 so as to span them. The scaffold portion 73 is composed of a plurality of frame members (not shown), which are continuously provided in the lateral direction.

  In addition, motors 76 and 77 are disposed in the elevating parts 74 and 75, respectively. The motors 76 and 77 move the elevating parts 74 and 75 up and down along the towers 71 and 72 when they are rotationally driven. The motors 76 and 77 are rotationally driven almost at the same time, whereby both the raising and lowering parts 74 and 75 are raised and lowered almost simultaneously. Therefore, the scaffold part 73 is moved up and down while maintaining almost horizontal.

  Here, the motors 76 and 77 usually have the same specifications, but there may be variations in the rotational speed, for example. Moreover, in the scaffold part 73, a load may be loaded with a bias toward the right end or the left end, or an operator may board with a bias toward the right end or the left end. Therefore, due to these reasons, as shown in FIG. 8B, when the scaffold part 73 is lifted, the scaffold part 73 may be slightly inclined. The elevating parts 74 and 75 are fixed to a scaffold part 73 composed of a plurality of frame members. Since the elevating speed of the elevating part 74 is faster than that of the elevating part 75, both the elevating parts 74 and 75 remain inclined. When lifted, for example, a pulling force as indicated by an arrow A is applied to the lift 75. Therefore, the standing state of the tower 72 on the lifting unit 75 side is hindered, and the tower 72 may be overturned.

  Further, if the scaffold portion 73 is lifted while being tilted, a load is applied to the rotating shaft of the motor 77 on the lifting / lowering portion 75 side, so that the product life of the motor 77 may be shortened or the motor 77 may be damaged.

  The present invention has been conceived under the circumstances described above, and can solve problems caused by tilting of the scaffold when the scaffold provided between the two towers moves up and down. It is an object of the present invention to provide an elevating scaffold device.

The elevating type scaffolding device provided by the present invention is provided between two tower portions extending in the vertical direction, two elevating portions provided so as to be movable up and down along each tower portion, and both the elevating portions. And a scaffold part that rises and lowers as the both raising and lowering parts move up and down, and the scaffold part is composed of a plurality of frame members connected in a lateral direction, and the scaffold part includes the scaffold part In order to remove the pulling force from the scaffold portion to the tower portion generated by the inclination when the frame is tilted by moving up and down, any one of the plurality of frame members is adjacent to the adjacent frame member. is interposed between the framing members, said lateral and tilt cushioning mechanism is provided constituted by a retractable movable member along a direction, the movable member, one of one of the framing members to the adjacent It is fixed to the assembly member and is movable along the framework member while being engaged with the other framework member, and the other framework member extends in the lateral direction and the inside is hollow. The movable member is composed of a rod-shaped portion and a pair of extending portions extending in the lateral direction from both ends thereof and capable of moving forward and backward in the hollow of the hollow angle member. It is characterized by.

  In the lifting and lowering scaffold apparatus according to the present invention, the tilt buffer mechanism may be provided in the vicinity of at least one of the tower portions in the scaffold portion.

  According to the present invention, when the scaffold part is tilted by being raised and lowered, the movable member is expanded and contracted between the adjacent frame members of the scaffold part. Therefore, the scaffold part is pulled against the tower part caused by the inclination of the scaffold part. The force can be removed by the tilt buffer mechanism. Therefore, the standing state of the tower part can be favorably maintained. Moreover, when the motor is used for the raising / lowering operation | movement of a scaffold part, the load with respect to the motor by the inclination of a scaffold part can be suppressed, for example.

It is a front view which shows the raising / lowering scaffold apparatus which concerns on this invention. The arrangement | positioning relationship of a 1st motor and a pinion is shown, (a) is a side view, (b) is a rear view. It is a front view which shows a scaffold part (intermediate scaffold part). It is a perspective view of the 1st frame member, the 2nd frame member, and a movable member which constitute an inclination buffer mechanism. It is a disassembled perspective view of a 1st frame member, a 2nd frame member, and a movable member. It is a perspective view which shows the inclination buffer mechanism in a handrail. It is a figure for demonstrating the effect | action of an inclination buffer mechanism, (a) is a normal state, (b) is a figure which shows the state which the movable member advanced. It is the schematic of the conventional raising / lowering type scaffold apparatus, (a) is a normal state, (b) is a figure which shows the state which the inclination produced.

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

  FIG. 1 is a front view showing an elevating scaffold device (hereinafter simply referred to as “scaffold device”) according to the present invention. This scaffold device is used for, for example, a temporary scaffold for construction work, and is particularly a lifting type in which a work floor is raised and lowered.

  As shown in FIG. 1, the scaffold device includes two towers. The scaffold device includes a first tower 1 having a predetermined height, a second tower 2 arranged in parallel at a predetermined interval, and a scaffold unit 3 that can be moved up and down supported by both towers 1 and 2. I have. The first tower 1 and the second tower 2 have substantially the same configuration. In the following description, members having the same configuration are denoted by the same reference numerals.

  Each tower 1, 2 has a base portion 4 for supporting it. The base part 4 is formed in a substantially flat plate shape, and a plurality of jack mechanisms 5 are provided at corners of the base part 4. The jack mechanism 5 maintains the base part 4 in a horizontal state by adjusting the respective heights.

  The base part 4 is provided with an outrigger mechanism 6. The outrigger mechanism 6 is composed of a plurality of members extending radially from the base portion 4, and supports the towers 1 and 2 with respect to the ground G. A jack mechanism 6 a is provided at each end of the outrigger mechanism 6. The base unit 4 is provided with a moving wheel (not shown). The wheel for movement is for moving each tower 1 and 2 to the predetermined position of a construction site.

  The first and second towers 1 and 2 are configured such that a plurality of frame members 7 whose outer shapes are formed in a substantially rectangular parallelepiped frame shape are connected. Specifically, the first and second towers 1 and 2 are configured such that the lowermost frame member 7 is attached at the center of the base portion 4 and the other frame member 7 is stacked above the frame member 7. Is done.

  A first rack 8 extending in the vertical direction is provided in the internal space of each frame member 7 of the first tower 1. The 1st rack 8 is formed in elongate shape, and as shown in FIG.2 (b), the meshing part 8a with which the several pinion 10 is meshed | engaged is formed in the one side end surface. Similarly, a second rack 9 extending in the vertical direction is provided in the internal space of each frame member 7 of the second tower 2. The second rack 9 has the same configuration as the first rack 8.

  The 1st tower 1 is provided with the 1st raising / lowering part 11 which can be raised / lowered up and down along it. The 1st raising / lowering part 11 is formed in the substantially rectangular parallelepiped frame shape extended in the height direction. The 1st raising / lowering part 11 is raised / lowered along the outer surface of the frame member 7 via a guide roller not shown. On the other hand, the second tower 2 is provided with a second elevating part 12 that can be moved up and down along the second tower 2. The second elevating unit 12 has the same configuration as the first elevating unit 11.

  As shown in FIGS. 1 and 2, a first motor 13 for raising and lowering the first elevating part 11 is attached to the first elevating part 11. The first motor 13 is an induction motor and is provided with a brake mechanism that stops its rotation. The first motor 13 is actually composed of two motors arranged side by side, and is considered in consideration of emergency safety such as using one motor when one motor fails. Yes. In the following description, the two motors are collectively referred to as the first motor 13.

  On the other hand, a second motor 14 is attached to the second elevating unit 12 for elevating it. The second motor 14 has the same configuration as the first motor 13.

  The first elevating unit 11 is provided with a first horizontal moving unit 15 that is disposed so as to cover the first elevating unit 11 and that can move horizontally in the front-rear direction (before or in the depth direction in FIG. 1). The first horizontal moving portion 15 is formed in a substantially rectangular parallelepiped frame shape extending in the front-rear direction. On the other hand, the 2nd raising / lowering part 12 is arrange | positioned so that it may be covered, and the 2nd horizontal movement part 16 which can move horizontally in the front-back direction is provided. Similar to the first horizontal movement unit 15, the second horizontal movement unit 16 is formed in a substantially rectangular parallelepiped frame shape extending in the front-rear direction. The 1st and 2nd horizontal moving parts 15 and 16 are raised / lowered when the 1st and 2nd raising / lowering parts 11 and 12 raise / lower.

  The scaffold unit 3 includes an intermediate scaffold unit 17 provided between the first and second horizontal moving units 15, 16, a right scaffold unit 18 extending in the right direction of the first horizontal moving unit 15, and a second horizontal unit. The left scaffolding part 19 extended in the left direction of the moving part 16 is comprised. The right scaffold portion 18 is provided with a right advance / retreat portion 20 that can be moved forward and backward in the right direction. On the other hand, the left scaffolding portion 19 is provided with a leftward advancement / retraction portion 21 that can advance and retreat in the leftward direction (FIG. Is shown.)

  By the said structure, when the 1st and 2nd raising / lowering parts 11 and 12 raise / lower, the 1st and 2nd horizontal movement parts 15 and 16 are raised / lowered, As a result, the scaffold part 3 also raises / lowers. Further, when the first and second horizontal moving parts 15 and 16 move in the front-rear direction, the scaffold part 3 also moves in the front-rear direction.

  The right scaffold portion 18 is rotatable in a fan shape around the first horizontal movement portion 15. Further, the left scaffold portion 19 is rotatable in a fan shape around the second horizontal movement portion 16.

  In addition, although the scaffold part 3 is classified into said structure by the difference in an installation site | part, as a common member structure, it is the some frame member formed in the substantially rectangular parallelepiped frame shape (framework member of the intermediate | middle scaffold part 17). Details will be described later), a work floor (not shown) disposed on the upper surface of each frame member and serving as a stepping floor for the worker, and a plurality of handrails 22 standing on each frame member to prevent the operator from falling. And have.

  A first auxiliary passage 23 connecting the intermediate scaffold portion 17 and the right scaffold portion 18 is provided around the first horizontal movement portion 15. In addition, a second auxiliary passage 24 connecting the intermediate scaffold portion 17 and the left scaffold portion 19 is provided around the second horizontal movement portion 16. By providing the first and second auxiliary passages 23 and 24, the work floor of the scaffold portion 3 extends from the right advance / retreat portion 20 arranged at the right end to the left advance / retreat portion 21 arranged at the left end. Is almost the same. Therefore, the worker who has boarded the scaffold unit 3 can move from the rightward advancement / retraction unit 20 to the leftward advancement / retraction unit 21 without once getting off the scaffold unit 3.

  The first and second towers 1 and 2 are each provided with a supporting mechanism 25 for supporting and supporting the intermediate scaffold part 17, the right scaffold part 18 and the left scaffold part 19 of the scaffold part 3. The right scaffold portion 18 and the left scaffold portion 19 are respectively supported by the respective supporting mechanisms 25 when they are turned.

  In addition, the handrail 22 of the right scaffold portion 18 is provided with a first control panel 26 for controlling the first motor 13 and the like of the first tower 1. On the other hand, the handrail 22 of the left scaffold 19 is provided with a second control panel 27 for controlling the second motor 14 and the like of the second tower 2.

  Here, the tilt buffer mechanism, which is a characteristic part of the present embodiment, will be described.

  The tilt buffer mechanism is provided at a predetermined portion of the intermediate scaffold portion 17. When the first and second horizontal moving parts 15 and 16 are raised or lowered, that is, when the scaffolding part 3 is raised or lowered, when the intermediate scaffolding part 17 is tilted, for example, the second horizontal moving part 16 is moved from the first horizontal moving part 15 to A tensile force (see arrow A in FIG. 8B) may be applied, but the tilt buffering mechanism is for removing it. The tilt buffer mechanism is provided on each of the frame member and the handrail 22 of the intermediate scaffold portion 17.

  As shown in FIG. 3, the frame member of the intermediate scaffold portion 17 includes a first frame member 31 connected to the first horizontal moving unit 15, a second frame member 32 connected to the second horizontal moving unit 16, and A plurality of intermediate frame members 33 provided between the first frame member 31 and the second frame member 32 are configured. The intermediate frame member 33 is formed to have a slightly longer dimension in the left-right direction than the first and second frame members 31 and 32.

  The tilt buffering mechanism is provided on the first horizontal moving unit 15 side and the second horizontal moving unit 16 side of the intermediate scaffold unit 17, respectively. As shown in FIG. 4, the tilt buffering mechanism on the first horizontal moving unit 15 side is interposed between the first frame member 31, the intermediate frame member 33, and is extendable along the lateral direction. It is constituted by a pair of movable members 34.

  The first frame member 31 is arranged in parallel in the horizontal vertical direction and extends in the horizontal direction, and the four hollow corner members 35 are connected to each other in the vertical direction and the depth direction. One end-side connecting member 36 and four other-end-side connecting members 37 that connect the other ends of each hollow corner member 35 in the vertical direction and the depth direction, respectively. Each hollow corner member 35 has a hollow structure inside. 4 and 5, the bracing member, the work floor, the handrail 22, and the like that are provided inside the frame member and connect the respective corner members are omitted.

  The first frame member 31 is provided with four connecting pieces 38 for connecting to the first horizontal moving portion 15 on one end side end face thereof. Each connecting piece 38 is formed to extend in the horizontal direction and in the left-right direction, and an insertion hole 38a through which a bolt (not shown) is inserted is formed at the center thereof. As shown in FIG. 5, four openings 39 are formed on the other end side (the other end of the hollow corner member 35) of the first frame member 31, and these openings 39 are connected to the hollow interior of each hollow corner member 35. Each communicates.

  The movable member 34 is formed in a substantially U shape in plan view (see FIG. 5). The movable member 34 includes a rod-like portion 41 extending in the depth direction, and a pair of extending portions 42 extending from both ends thereof in the lateral direction and in parallel. Each extending portion 42 is inserted into each hollow corner member 35 through the opening 39, so that the movable member 34 can be moved forward and backward with respect to the first frame member 31.

  At both ends of the end surface 41 a on the intermediate frame member 33 side of the rod-shaped portion 41, connection pieces 43 for connecting to the intermediate frame member 33 are provided. The connecting piece 43 protrudes in the up-down direction and the left-right direction, and an insertion hole 43a into which the bolt 44 is inserted is formed at the center. In the movable member 34 of the present embodiment, one connecting piece 43 is formed at one end of the rod-like portion 41 and two connecting pieces 43 are formed at the other end.

  The intermediate frame member 33 is arranged in parallel in the horizontal up-down direction and in parallel, and extends in the left-right direction, and one end of each of the square column members 46 that connects one end of each square-column member 46 in the up-down direction and the depth direction. The side connecting member 47 and four other end side connecting members 48 (see FIG. 4) that connect the other ends of each prismatic member 46 in the vertical direction and the depth direction, respectively.

  Four connecting pieces 49 for connecting to the movable member 34 are formed on the end surface of the intermediate frame member 33 on the movable member 34 side. The connecting piece 49 protrudes in the vertical direction and in the horizontal direction, and an insertion hole 49a into which the bolt 44 is inserted is formed at the center. Two connecting pieces 49 are provided at positions facing one connecting piece 43 of the movable member 34. When the movable member 34 and the intermediate frame member 33 are connected, the two connecting pieces 49 sandwich the one connecting piece 43. One connecting piece 49 is provided at a position facing the two connecting pieces 43 of the movable member 34. When the movable member 34 and the intermediate frame member 33 are connected, one connecting piece 49 is sandwiched between the two connecting pieces 43.

  Four connecting pieces 50 for connecting to the other intermediate frame member 33 are provided on the end surface on the other end (other intermediate frame member 33) side of the intermediate frame member 33 (see FIG. 4).

  With the above configuration, the pair of movable members 34 are connected to the second frame member 32, respectively, while being movable forward and backward with respect to the first frame member 31. That is, the pair of movable members 34 can be expanded and contracted in the lateral direction.

  Although not shown, the tilt buffering mechanism on the second horizontal moving unit 16 side has a configuration substantially similar to the tilt buffering mechanism on the first horizontal moving unit 15 side. Further, the connection configuration between the second frame member 32 and the second horizontal movement unit 16 is the same as the connection configuration between the first frame member 31 and the first horizontal movement unit 15. The connection configuration between the second frame member 32 and the intermediate frame member 33 is the same as the connection configuration between the first frame member 31 and the intermediate frame member 33.

  Next, an inclination buffer mechanism in the handrail 22 of the intermediate scaffold portion 17 will be described. As shown in FIG. 3, the handrail 22 is provided for each frame member. The handrail 22 includes a pair of support columns 51 erected from both left and right ends of each frame member, and an upper horizontal member 52 and a lower horizontal member 53 provided so as to connect the support columns 51.

  According to the present embodiment, between the handrail 22 of the first frame member 31 (hereinafter referred to as “first frame handrail 54”) and the handrail 22 of the intermediate frame member 33 (hereinafter referred to as “intermediate frame handrail 55”). , An inclination buffering mechanism is provided. That is, an inclination buffering mechanism is provided between the first frame handrail 54 and the intermediate frame handrail 55 on the extension lines of the upper horizontal member 52 and the lower horizontal member 53, respectively.

  The tilt buffering mechanism on the extension line of the upper horizontal member 52 includes a hollow rectangular member 56 and a prismatic member 57 as shown in FIG. The hollow corner member 56 has a hollow structure inside, and an opening 58 is formed at one end. A connecting piece 59 is formed at the other end of the hollow corner member 56, and the connecting piece 59 is connected to an attachment piece 60 provided on the column 51 of the first framed handrail 54.

  The prismatic member 57 is formed in a substantially prismatic shape, and is inserted into the hollow rectangular member 56 through the opening 58 so that the prismatic member 57 can be moved forward and backward with respect to the hollow rectangular member 56. A connecting piece 61 is formed at the other end of the prism member 57, and the connecting piece 61 is connected to a mounting piece 62 provided on the column 51 of the intermediate frame handrail 55.

  With the above configuration, the prismatic member 57 is connected to the column 51 on the intermediate frame assembly handrail 55 side, while being movable forward and backward with respect to the hollow rectangular member 56. The tilt buffer mechanism on the extension line of the lower horizontal member 53 has the same configuration as the tilt buffer mechanism on the extension line of the upper horizontal member 52. The tilt buffer mechanism in the handrail 22 is also provided between the handrail 22 of the second frame member 32 and the handrail 22 of the intermediate frame member 33.

  Next, the operation of the tilt buffer mechanism will be described.

  For example, when an operator inputs an elevation command on the first control panel 26, both the first and second motors 13 and 14 are rotationally driven. Accordingly, the first and second elevating parts 11 and 12 are raised and lowered, and the first and second horizontal moving parts 15 and 16 are raised and lowered, and accordingly, the scaffold part 3 is raised and lowered.

  Here, for example, if the rotational speeds of the first and second motors 13 and 14 vary or the load position of the luggage is uneven, as shown in FIG. May tilt. When the scaffold unit 3 is lifted and lowered while being tilted, for example, the second horizontal moving unit 16 is applied with a pulling force from the scaffold unit 3 (see arrow A in FIG. 8B), and the second tower 2 is standing up. Cause trouble. In this embodiment, since the inclination buffering mechanism is provided in the scaffold part 3, this tension force can be avoided.

  That is, when the intermediate frame member 33 is tilted below the first frame member 31 in the scaffold part 3 (intermediate scaffold part 17), the center of gravity position of the intermediate scaffold part 17 moves to the left side. Since the movable member 34 is provided so as to be able to advance and retreat with respect to the first frame member 31 connected to the first horizontal moving portion 15, the extending portion 42 of the movable member 34 is indicated by an arrow B (FIG. 7B). The movable member 34 retreats from the first frame member 31 while moving in the hollow of the hollow angle member 35 in the direction shown in FIG. Similarly, in the handrail 22, when the scaffold portion 3 is inclined, the prismatic member 57 moves so as to retreat inside the hollow rectangular member 56.

  Therefore, in this embodiment, a tensile force is not applied to the second horizontal moving unit 16. Therefore, the standing state of the second tower 2 is not hindered, and the standing state of the second tower 2 is maintained well. Further, the load due to the inclination of the intermediate scaffold portion 17 is not applied to the rotation shaft of the second motor 14. Therefore, the product life of the second motor 14 is not shortened or damaged.

  In contrast to the above-described tilt direction, when the intermediate scaffolding portion 17 is tilted so that the intermediate frame member 33 is below the second frame member 32, the tilt buffer mechanism on the second horizontal moving portion 16 side A movable member (not shown) moves to the right side. Therefore, the standing state of the first tower 1 is maintained well, and no load is applied to the rotating shaft of the first motor 13.

  The scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, one tilt buffer mechanism is provided on each of the first horizontal moving unit 15 side and the second horizontal moving unit 16 side of the intermediate scaffold unit 17. May be provided either in the vicinity of the first horizontal movement part 15 side or in the vicinity of the second horizontal movement part 16 side, or in the middle part of the intermediate scaffold part 17. May be.

  According to the above embodiment, the movable member 34 can be moved forward and backward with respect to the first frame member 31, but may instead be movable relative to the intermediate frame member 33. In this case, the prism member 46 of the intermediate frame member 33 may have a hollow structure. In this case, one end (fixed side) of the movable member 34 may be directly connected to the first horizontal moving unit 15.

  Further, the number, form, configuration and the like of the members constituting the tilt buffer mechanism in the above embodiment are not limited to those in the above embodiment. In addition, the configurations of the first and second towers 1 and 2, the scaffold unit 3, the first and second elevating units 11 and 12, the first and second motors 13 and 14, and the like can be appropriately changed in design. For example, the movable member 43 of the tilt buffer mechanism may be configured by an elastic member such as rubber or a spring instead of a frame structure.

DESCRIPTION OF SYMBOLS 1 1st tower 2 2nd tower 3 Scaffolding part 11 1st raising / lowering part 12 2nd raising / lowering part 13 1st motor 14 2nd motor 15 1st horizontal movement part 16 2nd horizontal movement part 17 Intermediate scaffold part 22 Handrail 31 1st Frame member 32 Second frame member 33 Intermediate frame member 34 Movable member 35 Hollow angle member 41 Rod-like portion 42 Extension portion

Claims (2)

Two towers extending vertically,
Two lifting parts provided so as to be movable up and down along each tower part;
A scaffolding part that is provided between the lifting parts and that moves up and down as the lifting parts move up and down;
The scaffold part is composed of a plurality of frame members connected in the lateral direction,
In the scaffold part,
In order to remove the pulling force on the tower part from the scaffold part caused by the inclination when the scaffold part is inclined by moving up and down,
Any adjacent frame member among the plurality of frame members;
An inclination buffering mechanism is provided which is interposed between the adjacent frame members, and is configured by a movable member which can expand and contract along the lateral direction .
The movable member is
It is fixed to any one of the adjacent frame members, and is movable along the frame member while engaging with the other frame member,
The other frame member is
A hollow corner member extending in the lateral direction and hollow inside;
The movable member is
A lifting and lowering scaffolding device comprising a rod-like portion and a pair of extending portions extending from both ends thereof in the lateral direction and capable of moving forward and backward in the hollow of the hollow rectangular member . The tilt buffer mechanism is
The lifting / lowering scaffold device according to claim 1, wherein the lifting / lowering scaffold device is provided in the vicinity of at least one of the tower portions.

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