JP2013040478A - Vertically movable scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a vertically movable scaffold with which a work deck can be deployed along with a wall surface including a curved surface and inclination.SOLUTION: In a vertically movable scaffold comprising a work deck 40L (40R) which vertically moves a mast 20 together with a drive section 30, the work deck 40L (40R) comprises a deck frame 40(I) including a fixed deck 42, a movable deck 43 and a rotary drive part 44. The fixed deck 42 and the movable deck 43 are connected movable by a deck rotation shaft 44a in parallel with a center axis 20X of the mast 20, and the rotary drive part 44 drives the deck rotation shaft 44a to rotate the movable deck 43 with respect to the fixed deck 42. Between the drive section 30 and the work deck 40L (40R), an elevation angle correction deck 40 is interposed which includes a drive section side deck 52, a scaffold side deck 53 and an elevation angle correction part 54, and the drive section side deck 52 and the scaffold side deck 53 are connected movable by an elevation angle rotation shaft 54a orthogonal to the center axis 20X of the mast 20. Then, the elevation angle correction part 54 drives the elevation angle rotation shaft 54a, thereby correcting an elevation angle of the scaffold side deck 53.

Description

  The present invention relates to an elevating scaffold for use in wall work of a structure, and in particular, even when the wall surface is a curved surface, the work deck can be deployed along the wall surface. The present invention relates to an elevating scaffold that can prevent the work deck from being tilted even when it is tilted.

  As a working scaffold used in a construction site such as a building, a lifting scaffold that can be easily installed and removed on the site is used. Such an elevating type scaffold has a drive unit that raises and lowers a mast attached to a base called a base plate, and a work deck attached to the drive unit (Patent Document 1). Such an elevating scaffold is suitable for use in a wall work of a structure whose work deck is linear in plan view and whose wall surface is substantially flat. It cannot be used for etc.

  Therefore, it has a work deck in which a plurality of girders (deck frames) are connected and integrated, and the work deck includes girders having a trapezoidal shape in plan view so that a shape along a bent wall surface can be formed. A type scaffold was proposed (Patent Document 2). However, when the bending (curvature) of the wall surface of the structure is different, the elevating scaffold has to be replaced with a girder having a trapezoidal shape.

JP 2010-106607 A JP 2010-138652 A

  As described above, in a conventional lifting type scaffold, the girder must be exchanged in response to the change in the curvature of the wall surface of the structure, in other words, the girder corresponding to the curved surface of the wall surface of the structure. There is a problem that each must be prepared or produced.

  In addition, when the wall surface of the structure is not vertical (when the wall surface is inclined), as shown in FIG. The mast 4 must be tilted so that the spacing does not change. The work deck 2 attached to the drive unit 1 and the deck plate 2a are also inclined, thereby hindering the work on the work deck 2.

  Further, in the case of a tower-like structure or the like with a curved wall and a slope (for example, in the case of a tower or chimney with a thick base and a thin tip), as shown in FIG. The work deck 2 deployed along the wall surface 3 has a difference in height between the vicinity of the mast 4 and the part away from the mast 4 in addition to the inclination of the deck plate 2a (the length of the work deck 2). Because it cannot be deployed horizontally even in the direction (deployment direction), the work is further hindered.

  The present invention has been made to solve the above problems, and can be developed along a wall surface having a curved surface without exchanging girders, and since the wall surface is a slope, the mast must be inclined. Even if this is not the case, the purpose is to realize a lift-type scaffold that can correct the inclination of the work deck and level the work deck.

  In order to solve the above-described problems, a lifting scaffold according to the present invention includes a mast, a drive unit that raises and lowers the mast, and a work deck that raises and lowers the mast together with the drive unit. Has a deck frame.

  The deck frame includes a fixed deck, a movable deck, and a rotation drive unit. The fixed deck and the movable deck are movably connected to each other by a deck rotation shaft positioned in parallel with the central axis of the mast. When driven by the rotation drive unit, the movable deck rotates with respect to the fixed deck (the movable deck rotates on the plane orthogonal to the central axis of the mast with the deck rotation axis as the axis. .) As a result, the work deck can develop the fixed deck and the movable deck of the deck frame along the wall surface (curved surface) of the structure.

  Further, an elevation angle correction deck having a drive side deck connected to the drive unit, a scaffold side deck connected to the work deck, and an elevation angle correction unit is interposed between the drive unit and the work deck, and the drive unit side The deck and the scaffold-side deck are movably connected by an elevation rotation axis positioned perpendicular to the center axis of the mast, and the elevation rotation axis is driven by the elevation angle correction unit, so that the scaffold-side deck and the operation connected thereto are performed. The level of the deck plate surface of the deck can be adjusted.

  Therefore, even when the mast has to be inclined because the wall surface is an inclined surface, the inclination of the work deck caused by the inclination of the mast can be corrected. Of course, even when the wall surface is a slope and a curved surface, the inclination of the work deck can be corrected in its length direction (deployment direction).

  As described above, according to the lifting and lowering scaffold according to the present invention, the work deck can be developed along the wall surface having a curved surface without exchanging the girder, and the mast is provided because the wall surface is a slope. Even when it is necessary to incline, the work deck can be expanded horizontally by correcting the inclination of the work deck caused by the inclination of the mast.

It is a figure which shows the front schematic structure of the raising / lowering scaffold concerning one Example (Example 1) of this invention. It is a figure which shows the front schematic structure of the deck frame which the work deck of the raising / lowering scaffold shown in FIG. 1 has. It is a figure which shows the front schematic structure of the elevation angle correction deck which the raising / lowering scaffold shown in FIG. 1 has. It is a figure which shows the example of a plane schematic structure of the deck frame shown in FIG. 2, and the example of rotation of the movable deck plate of a deck frame. It is a figure which shows the example of the elevation angle correction by an elevation angle correction deck. It is a figure which shows the example which expand | deployed the work deck of the raising / lowering scaffold shown in FIG. 1 along the wall surface (curved surface) of a structure. It is a figure which shows the example at the time of applying the conventional raising / lowering scaffold which does not have an elevation angle correction function to the wall surface which has an inclination.

  Hereinafter, an elevating scaffold according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, an elevating scaffold 1 according to one embodiment (first embodiment) of the present invention includes a base 10, a single mast 20 erected on the base 10, and a drive for raising and lowering the mast 20. Part 30 (the drive part deck plate 31 is attached to the upper part of the drive part 30), the work deck 40L connected to the first side part (left side part in FIG. 1) 30a side of the drive part 30, the drive The work deck 40R connected to the second side portion (right side portion in FIG. 1) 30b side of the unit 30 and two elevation angle correction decks 50 (the elevation angle correction deck 50 is connected to the drive unit 30 and the work. It is interposed between the deck 40L and between the drive unit 30 and the work deck 40R.)

  The work deck 40L has deck frames 40 (1), 40 (3),..., 40 (2n-1), and the work deck 40R has deck frames 40 (2), 40 (4),. 40 (2n) (Note that FIG. 1 shows only the deck frame 40 (1) for the work deck 40L, and only the deck frame 40 (2) for the work deck 40R, and The description of a rotation drive unit and an elevation angle correction unit, which will be described later, is omitted.)

  The deck frame 40 (i) (i = 1, 2,... N) has a length L (for example, L = 1.5 m) and is lightened, and has a plurality of connecting portions 41 at both ends thereof. Thus, the elevation angle correction deck 50 or another deck frame is connected.

  The deck frame 40 (i) has a fixed deck 42 and a movable deck 43 as shown in FIG. 2, and the movable deck 43 rotates on a deck 40 </ b> X located on an axis 40 </ b> X parallel to the central axis 20 </ b> X of the mast 20. The shaft 44a is movably connected to the fixed deck 42. Therefore, for example, when the mast 20 is erected vertically, the movable deck 43 can change its position relative to the fixed deck 42 on the horizontal plane.

  As shown in FIG. 3, the elevation correction deck 50 has a plurality of coupling portions 51 at both ends thereof and is connected to the drive unit 30 and is also connected to the work deck 40L or 40R to connect the drive unit 30 and the work. The decks 40L and 40R are integrally connected. Further, the elevation angle correction deck 50 can change the crossing angle (elevation angle) between the work decks 40L and 40R and the horizontal plane with the axis 54X orthogonal to the central axis 20X of the mast 20 as the rotation axis.

  That is, in the lifting type scaffold 1, the drive unit 30 can raise and lower the work decks 40L and 40R, and the deck frame 40 (i) changes its unfolded shape on a plane orthogonal to the central axis 20X of the mast 20. The elevation angle correction deck 50 can change the intersection angle (elevation angle) between the work decks 40L and 40R and the horizontal plane.

<Deck frame>
The schematic structure of the deck frame (i) will be described in more detail with reference to the example of the deck frame (2) connected to the elevation angle correction deck 50.

  As shown in FIGS. 2 and 4A, the deck frame 40 (i) has a fixed deck 42, a movable deck 43, and a rotation drive unit 44. The fixed deck 42 has a fixed deck plate 42a, and the movable deck 43 has a movable deck plate 43a.

  The fixed deck plate 42a and the movable deck plate 43a are rotatably connected by a deck rotating shaft 44a included in the rotation driving unit 44 at the center of the deck frame 40 (i). The overlapping portions of both deck plates are circular. The scaffold plate surface 40a of the deck frame 40 (i) is formed.

  The end side of the fixed deck 42 thus connected to the deck rotating shaft 44a is reinforced by a fixed deck frame 42b having a triangular cross section. The fixed deck frame 42b is provided with three coupling portions 41. Yes. Similarly, the end side of the movable deck 43 facing the deck rotation shaft 44a is also reinforced by a movable deck frame 43b having a triangular cross section, and the three coupling portions 41 are also provided on the movable deck frame 43b.

  Then, by connecting the deck frame 40 (i) to the elevation angle correction deck 50 or another deck frame by these connecting portions 41, the work decks 40L and 40R can be formed.

  The rotation drive unit 44 includes a motor 44b (rotation drive power source) attached to the fixed deck 42 and having a reduction gear mechanism, a worm gear 44c driven by the motor 44b, and a deck rotation shaft 44a. 44 a is positioned on an axis 40 </ b> X parallel to the central axis 20 </ b> X of the mast 20. Therefore, the positional relationship of the movable deck 43 with respect to the fixed deck 42 can be changed by rotationally driving the motor 44b.

  Here, FIG. 4B is a diagram showing a schematic plan configuration of the deck frame 40 (i) when the rotation angle of the movable deck 43 with respect to the fixed deck 42 is 0 degrees. The fixed deck plate 42a and the movable deck plate are shown in FIG. The scaffold plate surface 40a of the deck frame 40 (i) formed by 43a has a rectangular shape in plan view. FIG. 4C is a diagram showing a schematic plan configuration of the deck frame 40 (i) when the rotation angle of the movable deck 43 with respect to the fixed deck 42 is 30 degrees. The scaffold plate surface 40a of the deck frame 40 (i) is shown in FIG. In the plan view, it has a dogleg shape.

  Therefore, when each of the work decks 40L and 40R is formed by a plurality of deck frames 40 (i), the rotation angle of the movable deck 43 in each deck frame 40 (i) is set to correspond to the curvature of the wall surface. The work decks 40L and 40R can be developed.

  Here, the rotational driving power source is typically an electric motor, but it may be a power source based on a pressure difference of fluid such as compressed air or hydraulic pressure, or the worm gear 44c is driven by a manual handle. It may be a thing. The worm gear 44c transmits the power of the rotational drive power source to the deck rotation shaft 44a, but the rotation force on the deck rotation shaft 44a side is difficult to transmit to the motor 44b side. It is possible to prevent changes in preparation. Of course, after setting the rotation angle of the movable deck 43 with respect to the fixed deck 42, a lock mechanism or a brake mechanism for fixing the rotation angle may be provided.

<Elevation angle correction deck>
As shown in FIG. 3, the elevation angle correction deck 50 includes a drive unit side deck 52, a scaffold side deck 53, and an elevation angle correction unit 54. The drive unit side deck 52 has two horizontal members at the upper part and one horizontal member at the lower part and has a triangular cross section. The upper two horizontal members are A drive unit side deck plate 52a is attached. The scaffold side deck 53 is similarly configured, and a scaffold side deck plate 53a is attached.

  Further, the elevation angle correction deck 50 includes the three coupling portions 51 on the driving unit side deck 52 and the three coupling portions 51 on the scaffold side deck 53, respectively. Here, the coupling portion 51 of the driving unit side deck 52 is coupled to the first side portion 30a or the first side portion 30b of the driving unit 30, and the coupling portion 51 of the scaffolding side deck 53 is coupled to the work deck 40L or 40R, respectively. Thus, the work decks 40L and 40R are connected to the drive unit 30.

  The drive unit side deck 52 and the scaffold side deck 53 are connected by an elevation angle rotation shaft 54 a included in the elevation angle correction unit 54. The elevation rotation shaft 54a is positioned on an axis 54X orthogonal to the center axis 20X of the mast 20 and is rotatably supported by a bearing on the drive unit side deck 52, while being fixed on the scaffold side deck 53.

  The elevation angle correction unit 54 includes a motor 54b (elevation angle driving power source) having a reduction gear mechanism, and a worm gear 54c that rotates an elevation angle rotation shaft 54a driven by the motor 54b. Therefore, when the motor 54 b is rotated, the elevation angle rotation shaft 54 a rotates with respect to the drive unit side deck 52. Thus, the scaffold side deck 53 can be rotated relative to the drive unit side deck 52.

  FIG. 5 is a diagram for explaining the elevation angle correction in the elevation angle correction deck 50.

  In FIG. 5A, the mast 20 is erected vertically. In such a state, in the elevation angle correction deck 50 interposed between the drive unit 30 that raises and lowers the mast 20 and the work deck 40R, the drive unit side deck 52 (drive unit side deck plate 52a) is positioned on the horizontal plane. Become. Of course, by operating the elevation angle correction unit 54, the scaffold-side deck 53 (scaffold-side deck plate 53a) is also positioned on the horizontal plane (in FIG. 5A, the drive-unit-side deck 52 and the scaffold-side deck 53 are connected to each other. overlapping.). At this time, the scaffold plate surface 40a of the deck frame 40 (i) included in the work deck 40R connected to the elevation angle correction deck 50 is also positioned on the horizontal plane.

  In FIG. 5B, the mast 20 is erected with an inclination with respect to the vertical. Here, when the drive unit side deck plate 52a and the scaffold side deck plate 53a are positioned on the same plane, both deck plates are inclined with respect to the horizontal plane.

  For example, as shown in FIG. 5C, when the mast 20 is erected at an angle θ with respect to the vertical, the drive unit side deck 52 and the scaffold side deck 53 are positioned on the same plane. The deck frame 40 (i) of the work deck 40R connected to the elevation angle correction deck 50 is positioned on an inclined surface having an inclination angle θ with respect to the horizontal plane.

  By correcting the inclination angle θ by the elevation angle correction unit 54 and positioning the scaffold-side deck 53 horizontally, the deck frame 40 (i) of the work deck 40R connected to the elevation angle correction deck 50 can be positioned horizontally. (Note that even after the elevation angle correction, the drive unit side deck 52 has an inclination angle θ with respect to the horizontal plane.)

  Thus, even when the mast 20 is erected with an inclination angle θ with respect to the vertical, the elevating scaffold 1 has the scaffold plate surface 40a of the deck frame 40 (i) included in the work deck 40R. Can be deployed on a horizontal plane.

  Here, the elevation drive power source is not limited to the electric motor, and the worm gear 54c prevents the elevation angle of the scaffolding deck 53 from being changed inadvertently, and a lock mechanism or brake for fixing the elevation angle. The mechanism may be provided in the same manner as the rotation driving unit 44 of the deck frame 40 (i).

<Example of working deck deployment>
FIGS. 6A to 6D are plan views showing examples of development of the work decks 40L and 40R of the liftable scaffold 1.

  FIG. 6A shows an example in which one mast 20 is provided and the work decks 40L and 40R are deployed on the left and right sides of the drive unit 30. FIG. In FIG. 6A, the elevation angle correction deck 50 is not shown, but the elevation angle correction deck 50 is interposed between the drive unit 30 that raises and lowers the mast 20 and the work decks 40L and 40R. same as below).

  FIG. 6B shows an example in which there are two masts 20 and one work deck 40L (or work deck 40R) is deployed between the two masts 20. Here, since one work deck is supported by the two masts 20, more materials can be loaded on the work deck than in the example of FIG. 6A, and the deck frame 40 (i) can be mounted. Can be more (long work decks can be deployed).

  FIG. 6C is an example in which the work deck is developed in a substantially semicircular shape, and is an example in which three masts 20 are erected at both ends and an intermediate point of the substantially semicircular shape. Work decks 40L and 40R are unfolded on the left and right of the mast 20 standing at an intermediate point, and both ends of the work decks 40L and 40R are supported by the mast 20. Therefore, as compared with the examples of FIGS. 6A and 6B, the deck frame 40 (i) can be increased and more materials can be mounted on the work deck.

  FIG. 6D shows an example in which a total of four work deck work decks 40L (work decks 40R) are developed in a substantially circular shape, and is an example in which four masts 20 are erected at substantially equal intervals. Both work decks are supported by masts 20 at both ends.

  6 (a) to 6 (d), the expanded work deck not only encloses the wall surface of the structure with the expanded work deck (from the case where the wall surface is convex), but the expanded work deck is the structure. It may be a case where it is surrounded by wall surfaces (the wall surface may be concave).

  For example, the example of FIG. 6D is a development example in which a wall surface having a circular cross-sectional shape (for example, the outer peripheral wall surface of the chimney) is enclosed, and is developed inside the wall surface (for example, the inner periphery of the chimney). It is also an expanded example.

  When the wall surface of the structure is vertical, the mast 20 is erected vertically, so that the elevation angle correction deck 50 in the liftable scaffold 1 can be omitted (Example 2). Such an elevating type scaffold can expand the work deck along the wall surface and, of course, can expand the work deck horizontally even if the wall surface of the structure is curved without exchanging the girders.

  In addition, this invention is not limited to the Example mentioned above, It can deform | transform suitably and implement in the range which does not deviate from the meaning.

  Since the elevating scaffold according to the present invention can be manufactured, sold and used at a construction site, the present invention has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Lifting type scaffolding 10 Base 20 Mast 20X Mast central axis 30 Drive part 40L, 40R Work deck 40 (i) Deck frame 40a Scaffolding plate surface 40X The axis parallel to the mast central axis 42 Fixed deck 42a Fixed deck plate 43 Movable Deck 43a Movable deck plate 44 Rotation drive unit 44a Deck rotation axis 50 Elevation angle correction deck 52 Drive unit side deck 52a Moving side deck plate 53 Scaffold side deck 53a Scaffold side deck plate 54 Elevation angle correction unit 54a Elevation angle rotation shaft 54X Center axis of mast Axis perpendicular to

Claims (2)

In an elevating scaffold having a mast, a drive unit that raises and lowers the mast, and a work deck that raises and lowers the mast together with the drive unit,
The work deck has one or a plurality of deck frames having a fixed deck, a movable deck and a rotation drive unit,
The fixed deck and the movable deck are movably coupled by a deck rotation shaft positioned parallel to the central axis of the mast;
The rotation drive unit drives the deck rotation shaft to rotate the movable deck relative to the fixed deck,
An elevation angle correction deck having a drive unit side deck, a scaffold side deck and an elevation angle correction unit is interposed between the drive unit and the work deck,
The driving unit side deck and the scaffolding side deck are movably coupled with an elevation rotation axis positioned orthogonal to the central axis of the mast,
The elevating type scaffolding, wherein the elevation angle correction unit can drive the elevation angle rotation shaft to correct the elevation angle of the scaffold side deck with respect to the drive unit side deck. In an elevating scaffold having a mast, a drive unit that raises and lowers the mast, and a work deck that raises and lowers the mast together with the drive unit,
The work deck has one or a plurality of deck frames having a fixed deck, a movable deck and a rotation drive unit,
The fixed deck and the movable deck are movably coupled by a deck rotation shaft positioned parallel to the central axis of the mast;
The lifting / lowering scaffolding, wherein the rotation driving unit drives the rotation shaft to rotate the movable deck relative to the fixed deck.

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