Mobile scaffolding for slopes

Abstract

To reduce man-hours when working on inclined planes.SOLUTION: A mobile scaffold for inclined surfaces 100 includes a scaffold frame 10 having a pair of main frames 11 and a plurality of subframes 12, and a first traveling portion 20 that can move the scaffold frame 10 along a small beam 3 that is provided in advance on an inclined surface and extends in a substantially horizontal direction. The first traveling portion 20 includes a running roller 21 in contact with a parallel surface 3a of the small beam 3, a transmission roller 22 in contact with a first orthogonal surface 3b of the small beam 3, and a riding roller 23 capable of riding on a grand beam 4 extending from the small beam 3 in the inclination direction. When moving the scaffold frame 10, the transmission roller 22 moves away from the first orthogonal surface 3b in conjunction with the riding roller 23 riding on the grand beam 4 and moves to a position where it does not interfere with the grand beam 4.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a mobile scaffold for use on inclined surfaces. [Background technology]

[0002] Patent Document 1 discloses a mobile scaffold for inclined surfaces that uses a small beam, which is a component of a roof framing and is fixed above the beam, as a guide rail for moving the scaffold. This mobile scaffold for inclined surfaces is movable in the extension direction of the small beam by means of a rolling roller that contacts the upper surface of the small beam and a guide roller that contacts the side surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 06-101312 Summary of the Invention [Problem to be solved by the invention]

[0004] In the mobile scaffold for inclined surfaces described in Patent Document 1, guide rollers that come into contact with the side of the small beam are fixed to the main frame of the scaffold. When the guide rollers are fixed to the main frame in this way, if a member such as a grandchild beam extends from the side of the small beam along the inclination direction, the movement of the scaffold is restricted by the guide rollers coming into contact with the member such as the grandchild beam. For this reason, every time the movement of the scaffold is hindered by the member such as the grandchild beam, the scaffold must be lifted and moved by a crane or the like, which may result in an increase in the number of steps required for work on inclined surfaces.

[0005] An object of the present invention is to reduce the number of steps required for work on an inclined surface. [Means for solving the problem]

[0006] The present invention relates to a mobile scaffold for use in performing work on a slope, the mobile scaffold comprising: a scaffolding frame body having a pair of main frames arranged along the slope direction of the slope surface and a plurality of sub-frames arranged perpendicular to the pair of main frames; and a first running section capable of moving the scaffolding frame body along an existing member that is arranged in advance on the slope surface and extends in a substantially horizontal direction. The first running section comprises first running rollers that move the scaffolding frame body by contacting a parallel surface of the existing member that is substantially parallel to the slope surface; first transmission rollers that transmit the load of the scaffolding frame body in the slope direction to the existing member by contacting an upper first orthogonal surface of the existing member that is substantially orthogonal to the parallel surface; and a riding member configured to be able to ride up an obstructing member extending from the existing member along the slope direction. When the first running rollers are rotated to move the scaffolding frame body, the first transmission rollers move away from the first orthogonal surface in conjunction with the riding member riding up on the obstructing member, and move to a position where they do not interfere with the obstructing member. Effect of the Invention

[0007] According to the present invention, the number of steps required for work on an inclined surface can be reduced. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram for explaining an example of a slope on which the inclined surface mobile scaffolding according to the embodiment of the present invention is used. [Diagram 2] 2 is an enlarged view showing a portion indicated by an arrow A in FIG. 1. [Diagram 3] 3 is a diagram of the inclined surface mobile scaffolding as seen from the direction indicated by the arrow B in FIG. 2. [Figure 4] 4 is a cross-sectional view showing a cross section taken along line CC in FIG. 3, illustrating a first running portion. FIG. [Diagram 5] 5 is a view of the first running portion as seen from the direction indicated by the arrow F in FIG. 4. [Figure 6] 4 is a cross-sectional view showing a cross section taken along line DD in FIG. 3, illustrating a second running portion. FIG. [Figure 7]7 is a cross-sectional view showing a cross section taken along line GG in FIG. 6. [Figure 8] 7 is a cross-sectional view showing a cross section taken along line HH in FIG. 6. [Figure 9] 4 is a view seen from the direction indicated by arrow E in FIG. 3, showing an auxiliary running section. FIG. [Figure 10] 13A and 13B are diagrams illustrating a state of the first running portion when passing through the obstructing member. [Figure 11] 13A and 13B are diagrams illustrating a state of the second running portion when passing through the obstructing member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a mobile scaffold for slopes according to an embodiment of the present invention will be described with reference to the drawings.

[0010] First, a description will be given of a movable scaffold for inclined surfaces 100 according to an embodiment of the present invention with reference to Figures 1 to 3. The movable scaffold for inclined surfaces 100 is a scaffold used when working on inclined surfaces, and is configured to be movable along a horizontal direction perpendicular to the inclination direction of the inclined surface on which the work is performed.

[0011] The mobile scaffolding for inclined surfaces 100 is used, for example, when performing work to attach roofing materials to a building 1 having a roof surface 1a with a relatively steep slope, as shown in Figures 1 and 2. Note that the use of the mobile scaffolding for inclined surfaces 100 is not limited to the installation of roofing materials, and it may also be used, for example, in slope repair work and inspection work on the slopes of dams.

[0012] Fig. 1 is a side view of a building 1 having a valley in the roof, as viewed in the direction of the extension of the ridge, i.e., the direction of the girder. Fig. 2 is an enlarged view of the part indicated by the arrow A in Fig. 1, and mainly shows the side of the mobile scaffolding for inclined surfaces 100. Fig. 3 is a diagram showing the mobile scaffolding for inclined surfaces 100 as viewed from the direction indicated by the arrow B in Fig. 2.

[0013] As shown in Figure 2, the mobile scaffolding 100 for inclined surfaces is a structural component of a building 1, and utilizes an existing component extending approximately horizontally that is installed in advance on the roof surface 1a (inclined surface), such as a small beam 3 fixed to a beam (not shown) installed along the beam direction of the building 1, as a guide rail for moving the scaffolding.

[0014] As shown in Fig. 1, when the roof surface 1a of the building 1 is relatively large, multiple inclined surface mobile scaffoldings 100 are arranged along the inclination direction of the roof surface 1a. In the example shown in Fig. 1, three inclined surface mobile scaffoldings 100 are arranged, but the number of inclined surface mobile scaffoldings 100 arranged is not limited to this, and may be four or more, or may be one.

[0015] Specifically, as shown in Figures 2 and 3, the mobile scaffolding for inclined surfaces 100 includes a scaffolding frame body 10 composed of a pair of main frames 11 and a plurality of subframes 12, a first running section 20, a second running section 40 and an auxiliary running section 70 attached to the scaffolding frame body 10 in order to move the scaffolding frame body 10 along the longitudinal direction of a small beam 3 (existing member), and a stair section 14 installed on the scaffolding frame body 10. Note that the stair section 14 is not shown in Figure 3.

[0016] The main frame 11 and subframe 12 constituting the scaffolding frame 10 are H-shaped steel members, and the main frame 11 is provided as a pair along the inclination direction of the roof surface 1a (inclined surface), while the subframe 12 is provided perpendicular to the main frame 11. The subframe 12 is composed of a first subframe 12a having both ends butt-welded to the pair of main frames 11, and a second subframe 12b having one end butt-welded to the main frame 11.

[0017] The subframe 12 is fitted with each of the running sections 20, 40, 70 described below, which use girders 3 (existing members) that are roof foundation steel frames made of H-shaped steel materials or the like, as guide rails. For this reason, the intervals at which the subframes 12 are provided in the tilt direction are set to the same intervals as the intervals at which the girders 3 are provided in the building 1.

[0018] 2, the staircase 14 has multiple steps and is shaped so that workers can easily ascend and descend along the inclination direction of the roof surface 1a (inclined surface). In addition, the staircase 14 is provided with fall prevention fences 15 at predetermined intervals along the inclination direction.

[0019] The fall prevention fence 15 is mainly composed of a pair of posts 15a erected at both ends of the staircase section 14 in the extension direction of the subframe 12, and multiple bar members 15b bridged between the pair of posts 15a. Note that, in order to ensure the rigidity of the fall prevention fence 15, it is preferable to erect multiple sub-posts (not shown) on the staircase section 14 between the pair of posts 15a, and join the multiple bar members 15b to these sub-posts.

[0020] In this way, by installing the fall prevention fences 15 at predetermined intervals in the direction of inclination, the safety of workers can be increased and the sense of fear that workers may feel when ascending or descending the staircase section 14 can be reduced.

[0021] The fall prevention fence 15 is provided with a door (not shown) that can be opened toward the upper side in the inclination direction, and a worker can move up and down the staircase section 14 by opening this door. Such doors are also installed in the fall prevention fences 15 provided at the top and bottom of the mobile scaffolding for inclined surfaces 100. Therefore, as shown in FIG. 1, when multiple mobile scaffoldings for inclined surfaces 100 are arranged along the inclination direction, a worker can safely move to another mobile scaffolding for inclined surfaces 100 arranged below or above.

[0022] In addition to the fall prevention fence 15, handrails 17 for safely guiding workers' movement upward or downward are provided between the supports 15a along the inclination direction on the staircase section 14. The handrails 17 are provided only on one end side of the staircase section 14 in the extension direction of the subframe 12, and the other end side of the staircase section 14 where the handrails 17 are not provided serves as a work space for installing roof materials such as folded plate roof materials.

[0023] Here, in the building 1, a grandchild beam may be provided along the inclination direction between the minor beams 3 provided apart in the inclination direction in order to ensure rigidity. If the grandchild beam is provided so as to intersect with the minor beams 3, there is a risk that the grandchild beam will become an obstructing member that obstructs the movement of the scaffolding frame body 10 when the scaffolding frame body 10 is moved along the minor beams 3.

[0024] For this reason, the mobile scaffolding 100 for inclined surfaces of this embodiment is equipped with running sections 20, 40, 70 that enable the scaffolding frame body 10 to be moved safely and smoothly, even when obstructing members such as beams that may hinder the movement of the scaffolding frame body 10 are installed.

[0025] Next, the configuration of each of the running sections 20, 40, 70 will be described with reference to Fig. 4 to Fig. 9. Fig. 4 and Fig. 5 are views showing the first running section 20, Fig. 6 to Fig. 8 are views showing the second running section 40, and Fig. 9 is a view showing the auxiliary running section 70.

[0026] As shown in Figures 4 and 5, the first running section 20 has a running roller 21 (first running roller) that moves the scaffolding frame body 10 by contacting a parallel surface 3a of the surface of the minor beam 3 (existing member) that is approximately parallel to the roof surface 1a (inclined surface), a transmission roller 22 (first transmission roller) that transmits the load of the scaffolding frame body 10 in the inclination direction to the minor beam 3 by contacting a first orthogonal surface 3b on the upper side that is approximately perpendicular to the parallel surface 3a of the surface of the minor beam 3, a riding roller 23 (riding member) configured to be able to ride up on an obstructing member such as a grandchild beam 4 extending from the minor beam 3 along the inclination direction, a second lever member 27 that holds the transmission roller 22 rotatably, a first lever member 32 that holds the riding roller 23 rotatably, and a support section 24 that supports the running roller 21, the second lever member 27, and the first lever member 32.

[0027] The first running portion 20 is connected to the first flange 13a, which is the flange portion on the roof surface 1a side of the subframe 12, via the support portion 24. Note that Figures 4 and 5 show a state in which the first running portion 20 is located in a place where there are no obstructing members such as beams.

[0028] The running roller 21 is a cylindrical member and is rotatably mounted via a bearing (not shown) on a support shaft 26 that is arranged along a direction that is perpendicular to the inclination direction, i.e., the longitudinal direction of the subframe 12, and parallel to the parallel surface 3a.

[0029] 5, two support shafts 26 are provided at an interval in the longitudinal direction of the subframe 12 between a pair of support plates 25 provided on the support portion 24. In other words, the traveling rollers 21 are provided at two locations spaced apart from each other in the longitudinal direction of the subframe 12.

[0030] The two running rollers 21 thus arranged transmit the load of the scaffolding frame body 10 in a direction perpendicular to the inclination direction to the minor beam 3, while the transmission roller 22 transmits the load of the scaffolding frame body 10 in the inclination direction to the minor beam 3.

[0031] Between the pair of support plates 25 supporting the traveling rollers 21, a pair of support plates 28 supporting the second lever member 27 is provided. Between the pair of support plates 28, a second support shaft 29 serving as the rotation center of the second lever member 27 is provided so as to be aligned with the direction in which the scaffolding frame 10 is moved, i.e., along the longitudinal direction of the subframe 12.

[0032] The transmission roller 22 held by the second lever member 27 is a cylindrical member having a cylindrical portion 22a in contact with the first orthogonal surface 3b of the small beam 3 and flange portions 22b provided on both ends of the cylindrical portion 22a and having an outer diameter larger than that of the cylindrical portion 22a, and is rotatably attached to a support shaft 30 provided on one end side of the second lever member 27 via a bearing not shown.

[0033] The support shaft 30 is provided on the second lever member 27 so as to be perpendicular to the axial direction of the second support shaft 29 and along a direction parallel to the first orthogonal surface 3b when the second lever member 27 is positioned such that the cylindrical portion 22a of the transmission roller 22 and the first orthogonal surface 3b of the small beam 3 can come into contact with each other, as shown in Figure 4.

[0034] The flange portion 22b is provided to prevent the transmission roller 22, which rotates in contact with the first orthogonal surface 3b of the small beam 3, from coming off the first orthogonal surface 3b due to vibration or the like.

[0035] Further, of the pair of support plates 25 supporting the traveling roller 21, the support plate 25 located on the lower side in the inclined direction has a pair of support plates 34 supporting the first lever member 32 provided facing downward in the inclined direction.

[0036] Between the pair of support plates 34, a first support shaft 35 which serves as the rotation center of the first lever member 32 is provided so as to be aligned with the direction in which the scaffolding frame 10 is moved, i.e., along the longitudinal direction of the subframe 12. In other words, the first support shaft 35 is disposed parallel to the second support shaft 29.

[0037] The climbing roller 23 held by the first lever member 32 is a disc-shaped roller member, and is rotatably attached to a support shaft 33 provided on one end side of the first lever member 32 via a bearing (not shown).

[0038] The support shaft 33 is provided on the first lever member 32 so as to be perpendicular to the axial direction of the second support shaft 29 and along a direction parallel to the parallel surface 3a of the small beam 3 when the position of the first lever member 32 is in a position where the riding roller 23 is not in contact with any member, as shown in Figure 4.

[0039] 4, when the riding roller 23 attached to the support shaft 33 is not in contact with any member, the rotation center axis is located on the subframe 12 side from the parallel surface 3a of the small beam 3, and at least a part of the outer circumferential surface of the riding roller 23 is located on the small beam 3 side beyond the parallel surface 3a of the small beam 3. In other words, when an obstructing member such as a grand beam is provided so as to intersect with the small beam 3, the riding roller 23 is disposed at a position where it can rotate and ride up on the obstructing member. Note that the first lever member 32 is biased, for example, by a torsion spring (not shown) held by the first support shaft 35 so that one end side holding the riding roller 23 faces the small beam 3 and the other end side faces the subframe 12.

[0040] 5, two first lever members 32 that hold the climbing rollers 23 are provided between a pair of support plates 34 and spaced apart in the longitudinal direction of the subframe 12. That is, the climbing rollers 23 are provided at two locations spaced apart from each other by a predetermined first distance L1 in the longitudinal direction of the subframe 12.

[0041] The other end of the first lever member 32, which rotates around the first support shaft 35, and the other end of the second lever member 27, which rotates around the second support shaft 29, are rotatably connected to each other via a third support shaft 36 that is arranged parallel to the first support shaft 35 and the second support shaft 29.

[0042] Specifically, the third support shaft 36 is fixed to the other end of the first lever member 32, and the second lever member 27 has a long hole 31 through which the third support shaft 36 is inserted, as shown in FIG.

[0043] In this way, in the first running section 20, the climbing roller 23 is provided at one end of a first lever member 32 that is rotatable around a first support axis 35 that is provided along the direction in which the scaffolding frame body 10 is moved, and the transmission roller 22 is provided at one end of a second lever member 27 that is rotatable around a second support axis 29 that is provided parallel to the first support axis 35, and the other end of the first lever member 32 and the other end of the second lever member 27 are rotatably connected to each other via a third support axis 36 that is provided parallel to the first support axis 35 and the second support axis 29.

[0044] In other words, the second lever member 27 on which the transmission roller 22 is provided rotates in response to the rotation of the first lever member 32 on which the ride-on roller 23 is provided.

[0045] As shown in Figures 6 to 8, the second running section 40 has a running roller 41 (second running roller) that moves the scaffolding frame body 10 by contacting the parallel surface 3a of the sub-beam 3, a transmission roller 42 (second transmission roller) that contacts the first orthogonal surface 3b of the sub-beam 3 to transmit the load of the scaffolding frame body 10 in the inclination direction to the sub-beam 3, a guide roller 43 that contacts the second orthogonal surface 3c on the lower side of the surface of the sub-beam 3 that is approximately perpendicular to the parallel surface 3a, a first holder 44 that rotatably holds the transmission roller 42, a second holder 45 that rotatably holds the guide roller 43, a first support 46 that supports the running roller 41, the first holder 44 and the second holder 45, and a second support 47 that supports the first holder 44 together with the first support 46.

[0046] The second running portion 40 is connected to a first flange 13a, which is the flange portion on the roof surface 1a side of a pair of flange portions of the subframe 12, via a first support 46, and is connected to a second flange 13b, which is the other flange portion of the subframe 12, via a second support 47. Note that Fig. 6 shows a state in which the second running portion 40 is located in a place where there are no obstructing members such as beams.

[0047] The first support 46 connected to the first flange 13a is mainly composed of a pair of support plates 56 extending in a direction perpendicular to the longitudinal direction of the subframe 12 (the inclined direction), and the second support 47 connected to the second flange 13b is mainly composed of a pair of support plates 58 extending in a direction perpendicular to the longitudinal direction of the subframe 12 (the inclined direction).

[0048] The first holder 44 supported by the first support 46 and the second support 47 is formed in a shape having a thickness that allows it to be inserted between a pair of support plates 56 and a pair of support plates 58 with a small gap therebetween, as shown in FIG. 7, and the second holder 45 supported by the second support 47 is formed in a shape having a thickness that allows it to be inserted between a pair of support plates 56 with a small gap therebetween, as shown in FIG. 8.

[0049] The running roller 41 is a cylindrical member and is rotatably mounted via a bearing (not shown) on a support shaft 49 that is arranged along a direction that is perpendicular to the inclination direction, i.e., the longitudinal direction of the subframe 12, and parallel to the parallel surface 3a.

[0050] The support shaft 49 is provided between a pair of support plates 48 provided on the first support 46. The traveling rollers 41 thus provided transmit the load of the scaffolding frame 10 in a direction perpendicular to the inclination direction to the minor beam 3, while the transmission rollers 42 transmit the load of the scaffolding frame 10 in the inclination direction to the minor beam 3.

[0051] The transmission roller 42 held by the first holding body 44 is a cylindrical member, and is rotatably attached to a support shaft 50 provided on one end side of the first holding body 44 via a bearing (not shown).

[0052] The support shaft 50 is provided on the first holder 44 so as to be perpendicular to the longitudinal direction of the subframe 12 and along a direction parallel to the first orthogonal surface 3b when the first holder 44 is positioned such that the transmission roller 42 and the first orthogonal surface 3b of the sub-beam 3 can come into contact with each other, as shown in Figure 6.

[0053] In addition, the first holder 44 that holds the transmission roller 42 is provided with a displacement prevention plate 51 used to prevent the first holder 44 from being displaced in the oblique upward direction relative to the first support 46, and is also provided with a long hole 52a and a through hole 52b used to connect the first holder 44 to the second support 47.

[0054] On the other hand, the first support 46 is provided with a displacement restriction member 57 that abuts against the displacement prevention plate 51 of the first holder 44 so that its position can be adjusted along the inclination direction. Specifically, the displacement restriction member 57 has a threaded portion, and is screwed to a location facing the displacement prevention plate 51 when the first holder 44 is positioned so that the transmission roller 42 and the first orthogonal surface 3b of the small beam 3 can come into contact with each other, as shown in Fig. 6. Therefore, by bringing the end of the displacement restriction member 57 into contact with the displacement prevention plate 51, it is possible to prevent the first holder 44 from being displaced upward in the inclination direction.

[0055] The second support 47 is provided with a long hole 58a formed so as to intersect with the long hole 52a formed along the longitudinal direction of the first holding body 44, and is also provided with a first pin restricting portion 58b and a second pin restricting portion 58c formed corresponding to the through hole 52b. As shown in Fig. 6, the first pin restricting portion 58b is formed as a through hole, while the second pin restricting portion 58c is a notch portion formed by cutting out the pair of support plates 58. The second pin restricting portion 58c may be formed as a through hole like the first pin restricting portion 58b.

[0056] 7, one pin member 61 is inserted in the long hole 52a of the first holding body 44 and the long hole 58a of the second support body 47 in a state in which it cannot be pulled out. In other words, the first holding body 44 and the second support body 47 are connected via the pin member 61, and the first holding body 44 is movable relative to the second support body 47 only in the range where the long hole 52a and the long hole 58a intersect.

[0057] 6, the position of the first holding body 44 relative to the second support body 47 is determined by inserting a removable plug-in pin member 62 into the through hole 52b of the first holding body 44 and the first pin restriction portion 58b of the second support body 47. The position of the first holding body 44 relative to the second support body 47 can also be determined by inserting the plug-in pin member 62 into the elongated hole 52a of the first holding body 44 and the second pin restriction portion 58c of the second support body 47, as described later.

[0058] In this way, the long hole 52a and through hole 52b provided in the first holding body 44, the long hole 58a, the first pin regulating portion 58b and the second pin regulating portion 58c provided in the second support body 47, the pin member 61, and the plug pin member 62 function as a first switching portion 60 that can switch the position of the transmission roller 42 between a position where it can contact the first orthogonal surface 3b and a position where the transmission roller 42 does not interfere with an obstructing member such as a beam when the scaffolding frame body 10 is moved.

[0059] The guide roller 43 held by the second holding body 45 is a cylindrical member similar to the transmission roller 42, and is rotatably attached to a support shaft 53 provided on one end side of the second holding body 45 via a bearing not shown.

[0060] The support shaft 53 is provided on the second holder 45 so as to be perpendicular to the longitudinal direction of the subframe 12 and along a direction parallel to the second orthogonal surface 3c when the second holder 45 is positioned such that the guide roller 43 and the second orthogonal surface 3c of the sub-beam 3 can come into contact with each other, as shown in Figure 6.

[0061] The second holder 45 that holds the guide roller 43 is provided with a first through hole 54a and a second through hole 54b that are used to connect the second holder 45 to the first support 46.

[0062] In contrast, the first support 46 is provided with a first through hole 56a formed corresponding to the first through hole 54a, and a second through hole 56b and a third through hole 56c formed corresponding to the second through hole 54b.

[0063] 8, a pin member 65 is inserted into the first through hole 54a of the second holding body 45 and the first through hole 56a of the first support body 46 in a state in which it cannot be pulled out. In other words, the second holding body 45 and the first support body 46 are connected via the pin member 65, and the second holding body 45 is rotatable about the pin member 65 relative to the first support body 46.

[0064] 6 and 8, the position of the second holder 45 relative to the first support 46 is determined by inserting a removable plug-in pin member 66 into the second through hole 54b of the second holder 45 and the second through hole 56b of the first support 46. The position of the second holder 45 relative to the first support 46 can also be determined by inserting the plug-in pin member 66 into the second through hole 54b of the second holder 45 and the third through hole 56c of the first support 46, as described later.

[0065] In this way, the first through hole 54a and the second through hole 54b provided in the second holding body 45, the first through hole 56a, the second through hole 56b and the third through hole 56c provided in the first support body 46, the pin member 65 and the plug pin member 66 function as a second switching unit 64 that can switch the position of the guide roller 43 between a position where it can contact the second orthogonal surface 3c and a position where the guide roller 43 does not interfere with an obstructing member such as a beam when the scaffolding frame body 10 is moved.

[0066] As shown in Figure 6, when the first switching unit 60 positions the transmission roller 42 at a position where it can contact the first orthogonal surface 3b, and the second switching unit 64 positions the guide roller 43 at a position where it can contact the second orthogonal surface 3c, the existing member, the small beam 3, is sandwiched between the transmission roller 42 and the guide roller 43 in the inclined direction.

[0067] By sandwiching the minor beam 3 between the transmission roller 42 and the guide roller 43 in this manner, it becomes possible to move the scaffolding frame body 10 in a relatively stable manner. In order to prevent the transmission roller 42 and the guide roller 43, which rotate while sandwiching the minor beam 3, from coming off the minor beam 3 due to vibration, etc., the first retaining body 44 and the second retaining body 45 are each provided with flange portions 67, 68 formed to protrude toward the minor beam 3.

[0068] Specifically, as shown in Figure 6, when the first retaining body 44 is in a position where the transmission roller 42 and the first orthogonal surface 3b of the small beam 3 can come into contact with each other, a flange portion 67 is provided on the opposite side of the first support body 46 across the transmission roller 42, the flange portion 67 extending beyond the first orthogonal surface 3b toward the small beam 3.

[0069] Similarly, as shown in Figure 6, the second retaining body 45 has a flange portion 68 extending beyond the second orthogonal surface 3c toward the minor beam 3 when the guide roller 43 is in a position where the guide roller 43 and the second orthogonal surface 3c of the minor beam 3 can come into contact with each other, and is provided on the opposite side of the guide roller 43 from the first support body 46.

[0070] The flanges 67, 68 may be formed on the transmission roller 42 itself or the guide roller 43 itself, like the flange 22b of the transmission roller 22 of the first running portion 20 described above.

[0071] As shown in Figure 9, the auxiliary running portion 70 has two running rollers 71 and a support portion 72 that supports the running rollers 71, and is connected to the first flange 13a of the subframe 12 via the support portion 72.

[0072] A pair of support plates 73 supporting the traveling rollers 71 are provided in the support portion 72 along the longitudinal direction of the subframe 12, and two support shafts 73a are provided between the pair of support plates 73 in an inclined direction, i.e., perpendicular to the longitudinal direction of the subframe 12 and parallel to the parallel plane 3a. Cylindrical traveling rollers 71 are rotatably attached to the two support shafts 73a via bearings (not shown).

[0073] In this way, the scaffolding frame 10 is capable of moving along the minor beam 3 via the running sections 20 , 40 , 70 which are provided with rollers capable of coming into contact with each surface 3 a , 3 b , 3 c of the minor beam 3 .

[0074] 3, the first running section 20 is disposed on the upper side in the inclined direction, the auxiliary running section 70 is disposed on the lower side in the inclined direction, and the second running section 40 is disposed in the middle, but this arrangement is merely an example, and the locations and numbers of the running sections 20, 40, and 70 are not limited to this. For example, the auxiliary running section 70 may be provided adjacent to the first running section 20 or the second running section 40, not just on the lower side in the inclined direction.

[0075] The inclined surface mobile scaffolding 100 is moved, for example, by moving the lever of the lever block (registered trademark) with one hook of the lever block (registered trademark) hung on the small beam 3 and the other hook hung on the scaffolding frame body 10. The method of moving the inclined surface mobile scaffolding 100 is not limited to this, and may be moved, for example, by pulling a rope member stretched along the girder direction on the roof surface 1a manually or with a towing machine or the like installed on the inclined surface mobile scaffolding 100.

[0076] When the movement of the mobile scaffolding for inclined surfaces 100 is completed, a stopper (not shown) provided on the scaffolding frame 10 is engaged with the small beam 3, thereby fixing the mobile scaffolding for inclined surfaces 100 to the roof surface 1a.

[0077] Next, the state when the first running section 20 and the second running section 40 configured as described above pass through a grand beam 4 (obstructing member) provided so as to intersect with the minor beam 3 will be described with reference to Fig. 10 and Fig. 11. Fig. 10 shows the state when the first running section 20 passes through a location where an obstructing member such as a grand beam 4 is present, and Fig. 11 shows the state when the second running section 40 passes through a location where an obstructing member such as a grand beam 4 is present.

[0078] First, the state of the first running portion 20 will be described with reference to FIG.

[0079] When the first running part 20 approaches the grandchild beam 4 arranged to intersect with the minor beam 3, a part of the outer circumferential surface of the riding roller 23, which has exceeded the parallel surface 3a of the minor beam 3 and is positioned on the minor beam 3 side, rotates and rides up onto the grandchild beam 4. Then, as shown in Fig. 10, the riding roller 23 of the first running part 20 rides up onto the grandchild beam 4, that is, the first lever member 32 holding the riding roller 23 rotates around the first support shaft 35 in the direction indicated by the arrow R1.

[0080] The first lever member 32 is rotatably connected to the second lever member 27, which holds the transmission roller 22, via the third support shaft 36, so that the second lever member 27 rotates in the direction indicated by arrow R2 around the second support shaft 29 in response to the rotation of the first lever member 32.

[0081] Then, by the second lever member 27 rotating, the transmission roller 22 moves away from the first orthogonal surface 3b of the minor beam 3 to a position where it does not interfere with the secondary beam 4 (obstruction member).

[0082] In this way, when there is an obstructing member such as the grand beam 4, the transmission roller 22 will automatically move to a position where it will not collide with the grand beam 4. Therefore, since there is no need to hoist and move the inclined surface mobile scaffolding 100 by a crane or the like every time it crosses an obstructing member such as the grand beam 4, the inclined surface mobile scaffolding 100 can be moved safely and smoothly.

[0083] In addition, while the riding roller 23 is riding on the grandchild beam 4, the riding roller 23 is pressed against the grandchild beam 4 by the restoring force of a torsion spring (not shown) acting on the first lever member 32. Therefore, when the riding roller 23 passes the location where the grandchild beam 4 is provided, the riding roller 23 returns to a state in which a part of the outer circumferential surface exceeds the parallel surface 3a of the minor beam 3 and is positioned on the minor beam 3 side (the state shown in FIG. 4), and accordingly, the transmission roller 22 also returns to a state in which it is in contact with the first orthogonal surface 3b of the minor beam 3.

[0084] In addition, to ensure that the transmission roller 22 moves to a position where it does not interfere with the grand beam 4 (obstructing member), the position of the rotation center of each lever member 27, 32, the length of each lever member 27, 32, the outer diameter of the riding roller 23, and the length of the first distance L1 between the riding rollers 23 are optimized in advance.

[0085] For example, the length of the first distance L1 between the riding rollers 23 shown in Fig. 5 is set to be larger than the width of the grandchild beam 4 (obstruction member) in the extension direction of the small beam 3. By setting the first distance L1 between the riding rollers 23 in this manner, the transmission roller 22 can be reliably held in a position where it does not interfere with the grandchild beam 4 (obstruction member) until it passes the grandchild beam 4. Note that if the width of the grandchild beam 4 (obstruction member) is large or the size of the outer diameter of the riding roller 23 is limited, the number of riding rollers 23, i.e., the number of first lever members 32, may be increased to three or more, and if the width of the grandchild beam 4 (obstruction member) is small, only one riding roller 23 may be used.

[0086] Furthermore, if the transmission rollers 22 move away from the first orthogonal surface 3b of the minor beam 3 at the same time in the multiple first running parts 20 arranged along the direction in which the scaffolding frame 10 is moved, the load of the scaffolding frame 10 in the inclined direction cannot be transmitted to the minor beam 3, and the scaffolding frame 10 may not be supported by the minor beam 3 in the inclined direction. For this reason, it is preferable to set the interval between adjacent first running parts 20 to a interval different from the interval at which the grandchild beams 4 (obstruction members) are provided, so that the transmission rollers 22 do not move away from the first orthogonal surface 3b of the minor beam 3 at the same time in the multiple first running parts 20.

[0087] Next, the second running section 40 will be described with reference to FIG.

[0088] Before the second running section 40 reaches the grand beam 4 arranged to intersect with the small beam 3, the worker switches the positions of the transmission roller 42 and the guide roller 43 of the second running section 40 to a position where they do not interfere with the grand beam 4 (obstruction member), as shown in Figure 11.

[0089] To switch the position of the transmission roller 42, first, the insert pin member 62 of the first switching unit 60 is pulled out, and the displacement restriction member 57 is operated so as to move away from the displacement prevention plate 51. Then, the first holder 44 that holds the transmission roller 42 is moved in the direction shown by the arrow D1 in FIG. 11, and the transmission roller 42 is moved away from the first orthogonal surface 3b of the small beam 3.

[0090] Next, the first holding body 44 is moved along the elongated hole 52a in the direction indicated by the arrow D2, and further, the first holding body 44 is moved along the elongated hole 58a in the direction indicated by the arrow D3.

[0091] After moving the first holding body 44 in this manner, the insertion pin member 62 is inserted into the second pin restriction portion 58c and the elongated hole 52a, whereby the position of the first holding body 44 relative to the second support body 47 is determined.

[0092] As a result, the position of the transmission roller 42 is switched to a position where it does not interfere with the grand beam 4 (obstruction member).

[0093] On the other hand, when switching the position of the guide roller 43, first, the insert pin member 66 of the second switching portion 64 is pulled out. Then, the second holder 45 is rotated about the pin member 65 in the direction indicated by the arrow R3 in FIG. 11, and the guide roller 43 is separated from the second orthogonal surface 3c of the small beam 3.

[0094] After rotating the second holding body 45 in this manner, the insertion pin member 66 is inserted into the second through hole 54b and the third through hole 56c, whereby the second holding body 45 is positioned relative to the first support 46.

[0095] As a result, the position of the guide roller 43 is switched to a position where it does not interfere with the grand beam 4 (obstruction member).

[0096] In this way, when there is an obstructing member such as the grand beam 4, the transmission roller 42 and the guide roller 43 are moved in advance to a position where they will not collide with the grand beam 4. Therefore, since there is no need to hoist and move the inclined surface mobile scaffolding 100 by a crane or the like every time an obstructing member such as the grand beam 4 is crossed, the inclined surface mobile scaffolding 100 can be moved safely and smoothly.

[0097] In addition, while the position of the transmission roller 22 is automatically changed in the first running section 20, the positions of the transmission roller 42 and the guide roller 43 are manually changed in the second running section 40. For this reason, by intentionally not changing the positions of the transmission roller 42 and the guide roller 43 of the second running section 40 and keeping the second running section 40 in a state of abutting against an obstructing member such as a beam 4, it is also possible to make the second running section 40 function as a movement limiting section that limits the movement of the inclined surface mobile scaffolding 100.

[0098] According to the above embodiment, the following effects are achieved.

[0099] According to the mobile scaffolding for inclined surfaces 100 of this embodiment, when the scaffolding frame body 10 is moved, the transmission roller 22 of the first running section 20, which contacts the first orthogonal surface 3b of the minor beam 3 (existing member), moves away from the first orthogonal surface 3b in conjunction with the climbing roller 23 climbing up onto the secondary beam 4 (obstructing member), and moves to a position where it does not interfere with the secondary beam 4.

[0100] In this way, the transmission roller 22 is automatically prevented from hitting the second beam 4 (obstructing member). Therefore, since there is no need to lift and move the inclined surface mobile scaffolding 100 by a crane or the like every time it crosses an obstructing member such as the second beam 4, it becomes possible to move the inclined surface mobile scaffolding 100 safely and smoothly, and as a result, the number of steps required for work on the roof surface 1a (inclined surface) can be reduced.

[0101] In addition, the following modified examples are also within the scope of the present invention, and it is possible to combine the configuration shown in the modified example with the configuration described in the above embodiment, or to combine the configurations described in the different modified examples below.

[0102] In the above embodiment, the first running section 20 and the second running section 40 are provided on the scaffolding frame 10. Alternatively, only the first running section 20 may be provided on the scaffolding frame 10. In this case, since there is no second running section 40 whose roller position can be manually changed, it becomes possible to move the inclined surface mobile scaffolding 100 more smoothly.

[0103] In the above embodiment, each of the running sections 20, 40, 70 is attached to the subframe 12 of the scaffolding frame 10. Alternatively, each of the running sections 20, 40, 70 may be attached to the main frame 11 of the scaffolding frame 10.

[0104] In the above embodiment, the riding member is a riding roller 23 that can ride up on the obstructing member (the grand beam 4) while rotating. The riding member is not limited to a member that rides up on the obstructing member while rotating, and may be, for example, a member that rides up on the obstructing member while sliding via an inclined surface.

[0105] In the above embodiment, the second running section 40 is provided with the transmission roller 42 and the guide roller 43 so as to sandwich the small beam 3. For example, when the angle of the inclined surface is relatively gentle, there is little risk that the transmission roller 42 will come off the first orthogonal surface 3b of the small beam 3. For this reason, the second running section 40 may be configured without including the guide roller 43.

[0106] Although the embodiments of the present invention have been described above, the above-mentioned embodiments merely show some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above-mentioned embodiments. [Explanation of symbols]

[0107] 100···Mobile scaffolding for inclined surfaces 1...Buildings 1a Roof surface (sloping surface) 3. Beam (existing member) 3a...parallel plane 3b First orthogonal plane 3c Second orthogonal plane 4. Sun Liang (obstructing member) 10 Scaffolding frame 11. Mainframe 12 Subframe 20...First running section 21... Traveling roller (first traveling roller) 22 Transmission roller (first transmission roller) 23....Riding roller (riding member) 27 Second lever member 29...Second support shaft 32...First lever member 35...1st support shaft 36...Third support shaft 40...Second running section 41... Traveling roller (second traveling roller) 42 Transmission roller (second transmission roller) 43 Guide roller 60...1st switching section 64...Second switching section

Claims

1. A mobile scaffold for use on a slope, which is used when working on a slope, A scaffolding frame having a pair of main frames provided along the inclination direction of the inclined surface and a plurality of sub-frames provided perpendicular to the pair of main frames; A first running unit capable of moving the scaffolding frame along an existing member extending in a substantially horizontal direction and provided in advance on the inclined surface, The first running portion is A first running roller that moves the scaffolding frame by contacting a parallel surface of the existing member that is approximately parallel to the inclined surface; A first transmission roller that transmits the load of the scaffolding frame in the inclination direction to the existing member by contacting a first orthogonal surface on the upper side of the surface of the existing member that is approximately perpendicular to the parallel surface; a riding member configured to be able to ride up on an obstructing member extending from the existing member along the inclined direction, When the first running roller is rotated to move the scaffolding frame, the first transmission roller moves away from the first orthogonal plane in conjunction with the riding member riding on the obstructing member, and moves to a position where it does not interfere with the obstructing member. Mobile scaffolding for inclined surfaces.

2. the riding member is a roller member that can ride up on the obstructing member while rotating, and is disposed on the opposite side of the first transmission roller across the first running roller; The mobile scaffold for inclined surfaces according to claim 1.

3. The climbing member is provided at one end of a first lever member that is rotatable around a first support axis provided along a direction in which the scaffolding frame is moved, The first transmission roller is provided at one end of a second lever member that is rotatable about a second support shaft that is parallel to the first support shaft, The other end of the first lever member and the other end of the second lever member are rotatably connected to each other via a third support shaft parallel to the first support shaft and the second support shaft. A mobile scaffold for use on inclined surfaces according to claim 1 or 2.

4. The first running unit is arranged in a plurality of positions along a direction in which the scaffolding frame is moved, A distance between adjacent first running portions is set to a distance different from a distance at which the obstructing members are provided. A mobile scaffold for use on an inclined surface according to any one of claims 1 to 3.

5. Further provided is a second running unit capable of moving the scaffolding frame along the existing member, The second running portion is A second running roller in contact with the parallel surface; A second transmission roller in contact with the first orthogonal surface; A first switching unit that can switch the position of the second transmission roller between a position where the second transmission roller can contact the first orthogonal surface and a position where the second transmission roller does not interfere with the obstruction member when the scaffolding frame is moved. A mobile scaffold for use on inclined surfaces according to any one of claims 1 to 4.

6. The second running portion is A guide roller contacting a second orthogonal surface on a lower side of the surface of the existing member that is substantially orthogonal to the parallel surface; A second switching unit that can switch the position of the guide roller between a position where the guide roller can contact the second orthogonal surface and a position where the guide roller does not interfere with the obstructing member when the scaffolding frame is moved, When the second transmission roller is in a position capable of contacting the first orthogonal surface and the guide roller is in a position capable of contacting the second orthogonal surface, the existing member is sandwiched between the second transmission roller and the guide roller in the inclination direction. The mobile scaffold for use on an inclined surface according to claim 5.

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