Corner-mounted prism-type device for scaffolding structures

Abstract

To provide a falling object protective device for a corner closing a corner region between first falling object protective devices arranged in the X direction of a scaffold construction body and second falling object protective devices arranged in the Y direction, easily folded and developed.SOLUTION: A falling object protective unit (7) is constituted by covering a part between radial extensible / contractible frames (12) pivoted to the lower end vicinity of a columnar frame (10) with a foldable sheet (13), and by connecting a movable metal fitting (14) vertically movable along the columnar frame to an intermediate part of the extensible / contractible frame (12) with a link frame (15). When the movable metal fitting (14) is raised to a folding position (P1), the extensible / contractible frames (12) are converged upward with the sheet (13) in a folded state, and when the fitting metal is lowered to a developed position (P2), the corner region (1C) is closed by the sheet (13) developed by spreading of the extensible / contractible frames (12).SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a morning glory device for a corner installed in a corner area of a scaffold structure.

Background Art

[0002] In a temporary scaffold constructed at a construction site or a building site, etc., a morning glory device for receiving a falling object accidentally falling from a high place of the scaffold structure and preventing the risk of falling to the ground is known.

[0003] For example, as shown in FIG. 1, the scaffold structure 1 is constructed by connecting columns 2 erected vertically and horizontally to each other via a connecting member 3 and laying a scaffold board 4. At this time, during work at a high place, there is a risk that tools, work equipment, and other articles used by workers may accidentally fall from the work space to the outside space, so a morning glory device is provided.

[0004] Generally, the scaffold structure 1 is provided with a first morning glory 5 that projects obliquely upward from a first side edge extending in the X direction and a second morning glory 6 that projects obliquely upward from a second side edge extending in the Y direction with respect to the X direction and the Y direction that intersect at the corner portion. The first morning glory 5 and the second morning glory 6 are each formed of a rectangular panel and are arranged in a row along the first side edge and the second side edge.

[0005] However, since a substantially triangular or fan-shaped corner area 1C is formed between the first morning glory 5 and the second morning glory 6 adjacent to each other from the X direction and the Y direction, a morning glory of a rectangular panel like the first morning glory 5 or the second morning glory 6 cannot be suitably installed.

[0006] Therefore, in the conventional case, a morning glory formed of a fan-shaped panel of an isosceles triangle is installed in the corner area 1C (Patent Document 1). Alternatively, it is installed in a state where a morning glory formed of a rectangular panel and a morning glory formed of a fan-shaped panel are combined (Patent Document 2).

Prior Art Documents

Patent Documents

[0007] [Patent Document 1] Patent No. 4658021 [Patent Document 2] Patent No. 6286266 [Overview of the project] [Problems that the invention aims to solve]

[0008] By the way, for example, if work needs to be interrupted due to bad weather, the morning glories are at risk of being blown around by strong winds, so it is desirable to change their posture to one that is less susceptible to strong winds. That is, it is preferable to change their posture from an inclined position that extends diagonally upward to an almost upright position, and to position the panels along the working space of the scaffolding structure.

[0009] However, morning glories formed from panels are inherently susceptible to being buffeted by strong winds, even when they are in an upright position, due to their flat shape.

[0010] Furthermore, in the case of morning glories formed from panels, the process of changing their posture between a tilted position and an upright position in response to changes in weather and other factors is complicated, time-consuming, and imposes heavy labor on workers.

[0011] The present invention aims to provide a falling object receiving device for scaffolding that solves the above-mentioned problems. [Means for solving the problem]

[0012] Therefore, the means configured by the present invention relates to a scaffolding structure having a first side edge and a second side edge extending in the X and Y directions intersecting at a corner, and in a configuration in which a first morning glory extending diagonally upward from the first side edge and a second morning glory extending diagonally upward from the second side edge are installed, the corner morning glory device is installed diagonally upward while closing the corner region located between the first morning glory and the second morning glory, and comprises a columnar frame fixed to the corner and extending in the vertical direction, an expandable / contractable frame pivotally attached near the lower end of the columnar frame and extending radially, a foldable sheet covering the space between adjacent expandable / contractable frames, and the columnar frame The morning glory unit is composed of a movable fitting that moves up and down between an upper folding position and a lower unfolded position, and a link frame that pivotally connects the movable fitting to the middle of the longitudinal direction of the expansion / contraction frame. The morning glory unit is configured such that when the movable fitting is raised to the folding position, the expansion / contraction frame is rotated upward via the link frame, bringing the expansion / contraction frame together with the sheet folded, and when the movable fitting is lowered to the unfolded position, the expansion / contraction frame is expanded from the consolidated state via the link frame, so that the sheet unfolded from the folded state closes the corner area.

[0013] Preferably, at least three or more expansion / contraction frames are provided, and when expanded, the two expansion / contraction frames located on both sides are configured to overlap the first and second morning glories, respectively.

[0014] In a preferred embodiment, the sheet is composed of substantially triangular sheet pieces stretched individually between adjacent expansion and contraction frames, the expansion and contraction frames are provided with fixing members fixed to their sides, and the side edges of the sheet pieces are fixed by the fixing members while aligned with the sides of the expansion and contraction frames.

[0015] It is preferable to provide a receiving means to prevent the movable fitting from descending when the movable fitting is in the deployed position, and it is preferable to provide a locking means to prevent the movable fitting from descending when the movable fitting is in the folded position by locking it in a detachable manner.

[0016] Preferably, the columnar frame and the movable fitting are each formed with a non-circular cross-section, and the movable fitting is externally fitted to the columnar frame so as to be immobile in the circumferential direction and slidable in the longitudinal direction.

[0017] In this embodiment, the columnar frame of the morning glory unit is mounted along the corner support column, which is located at the corner of the support column used to construct the scaffolding structure. The unit is provided with a lower mounting means for mounting the lower end of the columnar frame and an upper mounting means for mounting the upper end. The lower mounting means includes a support bracket that is detachably fixed to the corner support column, and the plug portion of the lower end of the columnar frame is inserted into the socket portion of the support bracket from above. The upper mounting means is configured to fix the upper end of the columnar frame to the corner support column with the plug portion inserted into the socket portion.

[0018] In this case, it is preferable that the support fitting includes a receiving plate that faces the base end of the expanding / contracting frame, including the pivot portion, from below, and that the receiving plate is configured to cover the space between the base ends of adjacent expanding / contracting frames from below when the expanding / contracting frames are expanded radially.

[0019] Preferably, the support bracket is provided with pivoting devices on both sides of the socket portion, which pivotally support the pivot pieces of the first and second morning glory parts, respectively, so that they can rotate freely. [Effects of the Invention]

[0020] According to the present invention, a morning glory unit 7 that can be easily attached to and detached from the corner portion of the scaffold structure 1 can provide a corner morning glory device. The morning glory unit 7 expands the sheet 13 by a telescopic frame 12 that expands simply by lowering the movable fitting 14 to the deployment position P2, thereby closing the corner region C and preferably receiving falling objects. When there is a risk that the sheet 13 may be flapped by strong winds or the like, or when not in use, etc., the sheet 13 can be folded by raising the movable fitting 14 to the folding position P1 and converging the telescopic frame 12. There is an effect that such work can be performed easily and quickly from the work floor of the scaffold structure 1.

Brief Description of the Drawings

[0021] [Figure 1] It is a perspective view showing an example of the scaffold structure. [Figure 2] Regarding one embodiment of the corner morning glory device according to the present invention, it is a perspective view showing the morning glory unit and the state where the telescopic frame is expanded. [Figure 3] It is a side view showing a method of attaching and fixing the morning glory unit to the corner column of the scaffold structure. [Figure 4] It is a plan view of the state where a support fitting for installing the corner morning glory device is fixed to the corner column of the scaffold structure. [Figure 5] It is a plan view of the state where the corner morning glory device is installed on the corner column of the scaffold structure. [Figure 6] Regarding one embodiment of the morning glory unit, (A) is a perspective view showing the upper mounting means, movable fitting, pivot fitting, receiving means, and locking means provided on the columnar frame, and (B) is a perspective view showing the plug portion at the lower end of the columnar frame. [Figure 7] Regarding one embodiment of the morning glory unit, it is a perspective view showing the state where the telescopic frame is expanded by lowering the movable fitting to the deployment position. [Figure 8]The diagram shows the relationship between the expansion / contraction frame and the sheet. (A) is a perspective view showing the sheet piece unfolded by the expansion / contraction frame, and (B) is a cross-sectional view showing the structure for fixing the side edge of the sheet piece to the side surface of the expansion / contraction frame. [Figure 9] This perspective view shows how to attach a morning glory unit to a corner support by inserting the plug portion at the lower end of the columnar frame into the socket portion of the support bracket fixed to the corner support. [Figure 10] This is a magnified view of a portion of Figure 9. [Figure 11] This is a side view showing a morning glory unit attached to a corner support, with the expandable and retractable frames brought together by raising the movable fitting to the folded position. [Figure 12] This is a side view showing a morning glory unit attached to a corner support column, with the expandable frame in the expanded state by lowering the movable fitting to the unfolded position. [Figure 13] The support brackets are shown, with (A) being a top view, (B) a right side view, (C) a front view, and (D) a rear view. [Figure 14] The support brackets are shown; (A) is a perspective view, (B) is a perspective view from the direction of arrow B, and (C) is a perspective view from the direction of arrow C. [Figure 15] This diagram shows how to attach the support bracket to the corner post. (A) is a perspective view showing the state before attachment, (B) is a perspective view showing the state after attachment, and (C) is a side view showing the state after attachment. [Figure 16] Regarding the configuration in which the pivot piece of the first morning glory is pivotally attached to the morning glory pivot means of the support bracket, (A) is a perspective view showing the morning glory pivot means in a disassembled state, and (B) is a perspective view showing the state in which the pivot piece of the first morning glory faces the morning glory pivot means. [Figure 17] Regarding the configuration in which the pivot piece of the first morning glory is pivotally attached to the morning glory pivot means of the support bracket, (A) is a perspective view showing the state in which the pivot piece of the first morning glory is temporarily placed on the morning glory pivot means, (B) is a perspective view showing the state in which the pivot piece of the first morning glory is being guided and moved to a predetermined position, and (C) is a perspective view showing the state in which the pivot piece of the first morning glory is pivotally attached by the morning glory pivot means. [Modes for carrying out the invention]

[0022] Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0023] The corner morning glory device of the present invention is detachably attached to the corner support column 2C, which is located at the corner of the support column 2 that constitutes the scaffolding structure 1 shown in Figure 1 above, and is installed so as to extend diagonally upward while blocking the corner area 1C.

[0024] In the illustrated embodiment, the scaffolding structure 1 is made of single-pipe scaffolding, but it may also be made of frame scaffolding. Furthermore, the support columns 2 have flanges 2a with wedge holes fixed at intervals along their longitudinal direction, and a wedge fastening method is employed in which the connecting members 3 are fastened by driving wedges into the wedge holes of the flanges 2a, but the invention is not limited to this.

[0025] (Overall structure) The corner morning glory device consists of a morning glory unit 7 and lower mounting means 8 and upper mounting means 9 for attaching the morning glory unit 7 to the corner support column 2C.

[0026] As shown in Figures 2 and 3, the morning glory unit 7 is composed of a columnar frame 10 that extends vertically by being fixed along the corner support 2C, an expandable / contractable frame 12 that extends radially by being pivotally attached to the vicinity of the lower end of the columnar frame 10 via a pivot fitting 11, a foldable sheet 13 that covers the space between adjacent expandable / contractable frames, a movable fitting 14 that moves up and down along the columnar frame 10 between an upper folded position P1 and a lower unfolded position P2, and a link frame 15 that pivotally connects the middle of the longitudinal direction of the expandable / contractable frame 12 to the movable fitting 14.

[0027] As a result, when the movable fitting 14 of the morning glory unit 7 is raised to the folded position P1, the expandable frame 12 is rotated upward via the link frame 14, and the expandable frame 12 is brought together with the sheet 13 folded. Conversely, when the movable fitting 14 is lowered to the unfolded position P2, the expandable frame 12 is unfolded from the unfolded state via the link frame 14, thereby blocking the corner area 1C of the scaffolding structure 1 with the sheet 13 unfolded from the folded state.

[0028] The lower mounting means 8 is composed of a support fitting 16 having a plug portion 8a and a socket portion 8b, which are provided at the lower end of the columnar frame 10 of the morning glory unit 7. The support fitting 16 is formed from a separate fitting from the morning glory unit 7. As shown in Figure 3, the lower mounting means 8 is configured to attach the lower end of the columnar frame 10 to the corner support 2C by inserting the plug portion 8a into the socket portion 8b while the support fitting 16 is fixed to the corner support 2C. In this case, the lower mounting means 8 may also be configured by arranging the plug portion 8a and the socket portion 8b on opposite sides. That is, the socket portion 8b may be provided at the lower end of the columnar frame 10 and the plug portion 8a may be provided on the support fitting 16.

[0029] The upper mounting means 9 is composed of, for example, a fastening fitting 9a as shown in the figure, and is provided at the upper end of the columnar frame 10. The fastening fitting 9a is fastened by tightening a bolt while gripping the corner support 2C. This configures the upper end of the columnar frame 10 to be attached to the corner support 2C.

[0030] As shown in Figure 4, the corner morning glory device is installed in the corner area C by attaching the support bracket 16 to the corner support 2C after the first morning glory 5 and second morning glory 6 are installed in the X and Y directions, respectively, from the corner support 2C, and then, as described above, the lower end of the columnar frame 10 is fixed by inserting the plug portion 8a and socket portion 8b of the lower mounting means 8, and the upper end of the columnar frame 10 is fixed by tightening the fastening bracket 9a of the upper mounting means 9, and the morning glory unit 7 is attached and fixed to the corner support 2C.

[0031] The morning glory unit 7 is equipped with at least three or more expandable / contractable frames 12, and as shown in Figure 5, when expanded, the two expandable / contractable frames 12 located on both sides are configured to overlap the first morning glory 5 and the second morning glory 6, respectively. For this reason, with respect to the spacing angle θ1 between the first morning glory 5 and the second morning glory 6 centered on the corner support 2C that defines the corner region C, the spacing angle θ2 between the two expanded / contractable frames 12, 12 located on both sides is configured such that θ1 < θ2. In the illustrated embodiment, θ1 is 90 degrees and θ2 is 120 degrees. As a result, the corner region C is suitably closed by the unfolded sheet 13, and the corner morning glory device for the intended purpose is provided.

[0032] By the way, if the morning glory unit 7 needs to be changed, such as when it is in danger of being blown over by strong winds, the movable fitting 14 can be raised to the folded position P1, as shown by the dashed line in Figure 3, while it remains installed on the corner support 2C. This allows the expandable / contractable frame 12 to be brought together upwards with the sheet 13 folded.

[0033] (Specific composition of the morning glory unit) As shown in Figures 6 and 7, the columnar frame 10 and the movable fitting 14 each have a non-circular cross-section, and the movable fitting 14 is externally fitted to the columnar frame 10 so as to be immobile in the circumferential direction and slidable in the longitudinal direction. In the illustrated embodiment, the cross-section is formed as a rectangle, but it may be a polygon, or even an ellipse. As a result, when the movable fitting 14 is positioned in the folded position P1 or the unfolded position P2, or when it is being moved up and down, the movable fitting 14 does not rotate in the circumferential direction, and the link frame 15 is not twisted.

[0034] The pivot fitting 11 comprises a cylindrical portion 11a into which the lower end of the columnar frame 10 is inserted and fixed with bolts and nuts, and a tongue-shaped pivot piece 11b projecting radially from the cylindrical portion 11a toward the corner region C. In contrast, the expandable / contractable frame 12 has a bifurcated pivot piece 12a at its base end and is pivotally connected by a pivot 12b while sandwiching the pivot piece 11b.

[0035] As shown in Figure 6(B), the plug portion 8a is inserted into the lower end of the columnar frame 10, which is inserted below the pivot fitting 11, and is secured with a bolt and nut. The plug portion 8a is formed by bending a metal plate into a U-shape in cross-section, protruding downward from the columnar frame 10, and forming a guide portion 17 that gradually tapers towards the tip, and is provided with a locking hole 18 to prevent it from coming out of the socket portion 8b.

[0036] The movable fitting 14 comprises a cylindrical portion 14a that is slidably fitted onto the columnar frame 10, and a tongue-shaped pivot piece 14b that protrudes radially from the cylindrical portion 14a toward the corner region C. In contrast, the link frame 15 has a bifurcated pivot piece 15a at its base end, and is pivotally connected to the pivot piece 14b by a pivot 15b while sandwiching it.

[0037] As shown in Figure 8(A), the tip of the link frame 15 is pivotally connected via a pivot to a bifurcated pivot piece 14c provided in the middle of the longitudinal direction of the expansion / contraction frame 12.

[0038] The movable fitting 14 is preferably provided with a handle 19 as a gripping means for vertical movement, and a locking means 20 is provided to prevent the movable fitting 14 from descending by locking it detachably when the movable fitting 14 is raised to the folded position P1.

[0039] As shown in Figure 6, an end fitting 21 is fixed to the upper end of the columnar frame 10, and the end fitting 21 constitutes a means for mounting the upper mounting means 9 (fastening fitting 9a) and a means for receiving the raised movable fitting 14. The locking means 20 consists of a lock hole 20a of the movable fitting 14 and a first lock hole 20b of the columnar frame 10, which are in communication with each other when the movable fitting 14 is raised to the folded position P1 and comes into contact with the end fitting 21, and a lock pin 20c which is inserted and locked into both holes 20a and 20b so as to be removable.

[0040] As shown in Figures 6 and 7, when the movable fitting 14 is lowered to the deployed position P2, a receiving means 22 is provided to prevent the movable fitting 14 from descending by receiving it from below. In the illustrated embodiment, the receiving means 22 is constructed by fixing a substantially U-shaped fitting that embraces the columnar frame 10 at a position corresponding to the deployed position P2. In this case, it is preferable that a second locking hole 20d is provided in the columnar frame 10 that communicates with the locking hole 20a of the movable fitting 14 that is received by the receiving means 22. As a result, by inserting and locking the locking pin 20c through both holes 20a and 20d, the movable fitting 14 is locked in a state where it cannot move up and down, so that when the sheet 13 is buffeted by strong winds, the expansion and contraction frame 12 does not swing up and down together with the movable fitting 14.

[0041] The sheet 13 is made of a strong and foldable fabric or the like, and may consist of a single sheet that covers the entirety of multiple (three in the illustrated example) radially arranged expansion and contraction frames 12. However, in the illustrated embodiment, it consists of approximately triangular sheet pieces 13a that are individually stretched between adjacent expansion and contraction frames 12.

[0042] In this regard, as shown in Figure 8(B), the expandable frame 12 is preferably formed from a molded material made by extrusion molding of a metal such as aluminum, with grooves 23 formed on both sides, the grooves 23 being closed by a cover 24, and the cover 24 being fixed to the side of the expandable frame 12 by fasteners 25 such as rivets. In contrast, rib-shaped bulging edges 26 are formed on both sides of the sheet 13 (sheet piece 13a). In the illustrated embodiment, a core material 26a made of a rope or other cable is sandwiched by folding back the edge of the sheet, and the folded edge 26b is fixed by sewing or the like, thereby forming a bulging edge 26 that encloses the core material 26a.

[0043] The groove portion 23 comprises, in cross-section, a main groove 23a that holds the bulging edge portion 26 in a receiving state, a secondary groove 23b extending from the main groove 23a, and a rib portion 23c formed on the opening edge of the main groove 23a. In contrast, the cover 24 comprises a fixed holding portion 24a inserted into the secondary groove 23b, a rib-shaped pressing portion 24b facing the opening edge of the main groove 23a, and a strip-shaped portion 24c fixed to the side surface of the expandable / contractable frame 12 by the fastener 25.

[0044] As shown in the figure, the bulging edge portion 26 of the sheet 13 is inserted along the main groove 23a, the fixing and holding portion 24a of the cover 24 is inserted into the sub-groove 23b, and the strip portion 24b is brought into contact with the side surface of the expansion and contraction frame 12 and secured with a fastener 25. As a result, the bulging edge portion 26 of the sheet 13 is held between the main groove 23a and the fixing and holding portion 24a, and the folded edge portion 26c is held by the rib portion 23c and the pressing portion 24b facing the outside of the bulging edge portion 26. Therefore, the sheet 13 is fixedly held against the side surface of the expansion and contraction frame 12 in a state where the bulging edge portion 26 cannot escape. Consequently, even if a falling object hits the sheet 13 with force, the sheet 13 will not detach from the expansion and contraction frame 12, and there is no risk of the falling object passing through.

[0045] As described above, the corner morning glory device is installed by attaching and fixing the support bracket 16, which has a socket portion 8b that constitutes the lower mounting means 8, to the corner support column 2C, inserting the plug portion 8a at the lower end of the columnar frame 10 into the socket portion 8b, and fastening the fastening bracket 9a that constitutes the upper mounting means 9 at the upper end of the columnar frame 10 to the corner support column 2C, thereby attaching the morning glory unit 7 to the corner support column 2C.

[0046] As shown in Figures 9 to 12, the support bracket 16 comprises a mounting portion 27 that rests on a predetermined flange 2a of the corner post 2C, a V-shaped attachment portion 28 that is attached to the circumferential surface of the corner post 2C, and a fixing portion 29 consisting of a fastening fitting or the like that is fastened to the circumferential surface of the corner post 2C, thereby attaching and fixing it to the corner post 2C. In this case, it is preferable that the mounting portion 27 has an insertion piece 27a that is positioned by being inserted into a wedge hole in the flange 2a.

[0047] The socket portion 8b provided on the support bracket 16 is equipped with a locking pin 8c that can move back and forth toward the inside of the socket portion. Therefore, the morning glory unit 7 is inserted in a way that prevents it from coming loose by inserting the locking pin 8c into the locking hole 18 while the plug portion 8a at the lower end of the columnar frame 10 is inserted into the socket portion 8b. In this state, the lower end edge 10a of the columnar frame 10 (see Figure 6(B)) is placed on the upper end edge of the socket portion 8b, supporting the morning glory unit 7 from below.

[0048] When attaching or detaching the morning glory unit 7 to the corner support column 2C, as shown in Figures 9 to 11, the movable fitting 14 is raised to the folded position P1, thereby converging the link frame 15 downwards and converging the expandable / contractable frame 12 upwards, allowing the work to be performed in a compact, non-bulky state. Moreover, the work can be easily performed from the work platform of the scaffolding structure 1.

[0049] As shown in Figure 12, when the morning glory unit 7 attached to the corner support column 2C is lowered to the unfolded position P2 by the movable fitting 14 and the expandable frame 12 is expanded, the sheet 13 unfolds and closes the corner area C, thus providing a corner morning glory device that can catch falling objects.

[0050] In this case, as shown in Figure 12, it is preferable that a receiving plate 30 is provided on the support fitting 16, positioned below the socket portion 8b and facing from below the base end of the expandable frame 12, which includes the pivot piece 12a. Since the expandable frame 12 has a sheet 13 stretched from the vicinity of the pivot piece 12a to the tip, the region S between the columnar frame 10 and the pivot piece 12a is not closed by the sheet 13. Therefore, when small items such as bolts and nuts fall toward the region S, they can be caught by the receiving plate 30.

[0051] By the way, for example, if work needs to be interrupted due to bad weather, the deployed sheet 13 may be blown around by strong winds, potentially damaging the morning glory unit 7. In this case, as shown in Figure 11, by raising the movable fitting 14 to the folded position P1 and locking it with the locking means 20, the link frame 15 is brought together downwards, and the expansion / contraction frame 12 is brought together upwards with each sheet piece 13a folded in half, so that it will not be blown around by strong winds. Furthermore, the operation of moving the movable fitting 14 up and down between the folded position P1 and the deployed position P2 can be easily and quickly performed from the work platform of the scaffolding structure 1.

[0052] (Preferred embodiment of the support bracket) Figures 13 to 17 show a preferred embodiment of the support bracket 16. In addition to constituting the lower mounting means 8 (socket portion 8b) of the morning glory unit 7, the support bracket 16 is provided with pivoting devices 31X and 31Y for pivotally connecting the side frames of the first morning glory 5 and the second morning glory 6 facing the corner post 2C, respectively. As described above, the support bracket 16 is attached and fixed to the corner post 2C as shown in Figure 4, and the side frames of the first morning glory 5 and the second morning glory 6 are pivotally connected to the pivoting devices 31X and 31Y, after which the morning glory unit 7 is attached.

[0053] (pivot device) The pivot devices 31X and 31Y are provided on bracket plates 32, 32 fixed to both sides of the socket portion 8b that constitutes the lower mounting means 8. The bracket plates 32, 32 are arranged to face each other in the X and Y directions, respectively, and the fixing portion 29 (fastening fitting) is provided on the connecting piece 32a that connects the upper ends of the bracket plates 32, and the lower ends are connected by the splice portion 28, while the mounting portion 27 and insertion piece 27a described above are formed at the lower end of each bracket plate 32.

[0054] By the way, the pair of pivoting devices 31X and 31Y are configured to be symmetrical with respect to the central axis of the fixing portion 29, and their structure, function, and method of pivoting the side frame of the morning glory are the same. Therefore, the pivoting device 31X (hereinafter simply referred to as pivoting device 31) for pivoting the side frame of the first morning glory 5 will be described below.

[0055] The bracket plate 32 is fixed to the base plate 33 by welding or the like, and the pivot 34 and retaining shaft 35, which pass through the bracket plate 32 and the base plate 33, are fixed in a state where they are spaced apart vertically. In this case, the pivot 34 and retaining shaft 35 are oriented with their axes in the X direction.

[0056] As shown in Figures 16 and 17, the pivot hole 5c of the pivot piece 5b, which is provided at the base end of the side frame 5a of the first morning glory 5, is pivotally supported on the pivot shaft 34. A retaining plate 36 for holding the pivot piece 5c is rotatably and slidably provided on the retaining shaft 35.

[0057] As shown in Figure 16(A), the retaining plate 36 has a spacer 36a at its base end facing the seat plate 33, a mounting hole 37 that penetrates the base end including the spacer 36a, and a through hole 38 at its tip. The retaining shaft 35 has a male threaded portion 35a at its base shaft located below the pivot 34, and a non-threaded shaft end 35b extending axially from the male threaded portion 35a. A nut 39 is screwed onto the male threaded portion 35a.

[0058] As a result, the retaining plate 36 is externally fitted with the mounting hole 37 so as to be rotatable and slidable on the retaining shaft 35, and when rotated around the retaining shaft 36 to assume an upward position, the insertion hole 38 faces the pivot 34.

[0059] As shown in Figure 16(B), prior to the operation of pivoting the pivot piece 5b of the first morning glory 5, the retaining plate 36 is suspended in a state where it is rotated downward from the retaining shaft 35, and the nut 39 is fitted onto the shaft end 35b. Therefore, the pivot 34 is open and free from interference, and the pivot piece 5b of the side frame 5a can be easily brought into close proximity.

[0060] As shown in Figures 17(A) and 17(B), with the pivot hole 5c of the pivot piece 5b of the side frame 5a fitted onto the pivot 34, the retaining plate 36 rotates to an upward position relative to the retaining shaft 35, and then slides, causing the insertion hole 38 to be fitted onto the pivot 34. By fastening the nut 39 to the male threaded portion 35a, the side frame 5a is pivotally connected, as shown in Figure 17(C), with the pivot piece 5b held between the base plate 33 and the retaining plate 36. At this time, the spacer 36a abuts against the base plate 33, creating a space that allows the pivot piece 5b to rotate freely.

[0061] (Support device for pivoting operations)

[0062] The pivoting device 31 is equipped with support devices to facilitate pivoting operations, such as aligning the pivot hole 5c with the pivot shaft 34.

[0063] The support device consists of a temporary support stand 40 provided on the bracket plate 32 facing the pivot 34, and an assist means 41 provided facing the pivot piece 5b of the side frame 5a.

[0064] The temporary support stand 40 is formed from a metal plate bent into a roughly L shape and includes a parallel support 40a extending parallel to the axis of the pivot 34 and a crossing support 40b that intersects the axis of the pivot at a position spaced axially away from the tip of the pivot 34.

[0065] In contrast, the assist means 41 at the base end of the side frame 5a is composed of a temporary placement portion 41a that forms the end face of the base end and a guide portion 41b located to the side of the pivot hole 5c. In the illustrated example, the temporary placement portion 41a is formed by the lower surface of a metal plate bent from the pivot piece 5b, and the guide portion 41b is formed by inclining the edges of metal plates fixed on either side of the temporary placement portion 41a downward toward the pivot piece 5b.

[0066] With such a support device in place, as shown in Figure 17(A), when positioning the pivot piece 5b of the side frame 5a toward the pivot 34, the temporary placement section 41a can be placed on the temporary placement stand 40 for temporary placement.

[0067] From this state, as shown in Figure 17(B), by slightly lifting the side frame 5a, the guide portion 41b (shown by the dashed line on the right side of the figure) is positioned inside the parallel bench 40a and placed on the cross bench 40b, so that the pivot hole 5c faces the pivot 34.

[0068] Therefore, when the side frame 5a is lowered by its own weight, the pivot piece 5b moves toward the seat plate 33 along the inclination of the guide portion 41b, and the pivot hole 5c is fitted onto the pivot 34.

[0069] Therefore, from this point onward, the retaining plate 36 should be rotated upward as described above and held in place by the nut 39. [Explanation of Symbols]

[0070] 1. Scaffolding structure 1C Corner area 2 pillars 2a Flange 2C Corner Post 3 Connecting material 4 scaffolding planks 5. First Morning Glory 5a side frame 5b Pivot piece 5c pivot hole 6. Second Morning Glory 7 Morning Glory Unit 8 Lower attachment means 8a Plug section 8b Socket section 8c Locking pin 9 Upper mounting means 9a Fastening hardware 10 Columnar Frame 11 Pivot fittings 11a Cylindrical part 11b Pivot piece 12 Scaling Frames 12a Pivotal connection piece 12b Axis 13 seats 13a Sheet piece 14 Movable fittings 14a Cylindrical part 14b Pivot piece 14c pivot piece 15 Link Frames 15a Pivotal connection piece 15b Axis 16 Support brackets 17 Guide Section 18 Locking holes 19 Handle 20 Locking mechanism 20a Lock hole 20b First lock hole 20c lock pin 20d Second lock hole 21 End fittings 22 Receiving means 23 Groove 23a Main groove 23b Minor groove 23c Rib section 24 Cover 24a Fixed holding part 24b Pressing part 24c Band-shaped area 25 Fastener 26. Bulging edge 26a Core material 26c Folded edge 27 Mounting section 27a Insertion piece 28 Attachment part 29 Fixing part 30 support plate 31X, 31Y pivoting device 32 Bracket plate 32a Connecting piece 33 Seat board 34 Axis 35 Holding axis 35a Male thread part 35b Shaft end 36 Retention version 36a Spacer 37 mounting holes 38 Through hole 39 Nuts 40 Temporary Stand 40a Parallel bench 40b Crossed Bench 41 Assistance means 41a Temporary placement section 41b Guide section

Claims

1. Regarding a scaffolding structure having a first and second side edge extending in the X and Y directions intersecting at a corner, in a configuration in which a first bell (5) extending diagonally upward from the first side edge and a second bell (6) extending diagonally upward from the second side edge are installed, the corner bell device is installed diagonally upward while closing the corner region (1C) located between the first and second bells, The morning glory unit (7) is composed of a columnar frame (10) fixed to the corner and extending vertically, an expandable / contractable frame (12) pivotally attached near the lower end of the columnar frame and extending radially, a foldable sheet (13) covering the space between adjacent expandable / contractable frames, a movable fitting (14) that moves up and down along the columnar frame between an upper folded position (P1) and a lower unfolded position (P2), and a link frame (15) that pivotally connects the middle of the longitudinal direction of the expandable / contractable frame to the movable fitting. When the morning glory unit (7) raises the movable fitting (14) to the folded position (P1), it rotates the expansion / contraction frame upward via the link frame, thereby bringing the expansion / contraction frame (12) together with the sheet (13) folded. A corner bell-shaped device for a scaffolding structure, characterized in that when the movable fitting (14) is lowered to the deployed position (P2), the expandable frame (12) is expanded from the converged state via the link frame, thereby closing the corner region (1C) with the sheet (13) that has been unfolded from the folded state.

2. Corner prism device for a scaffolding structure according to claim 1, characterized in that at least three or more expansion / contraction frames are provided, and when expanded, the two expansion / contraction frames (12,12) located on both sides are configured to overlap the first prism (5) and the second prism (6), respectively.

3. The aforementioned sheet (13) is composed of substantially triangular sheet pieces (13a) individually stretched between adjacent expansion and contraction frames (12,12), The aforementioned expandable / contractable frame (12) is provided with a fixing member (24) that is fixed to the side, The corner prism device for a scaffolding structure according to claim 1, characterized in that both side edges of the sheet piece (13a) are fixed to the side surface of the expandable frame by the fixing member (24).

4. The corner prism device for a scaffolding structure according to claim 1, characterized in that a receiving means (22) is provided to prevent the lowering of the movable fitting (14) when it is lowered to the deployed position (P2).

5. The corner prism device for a scaffolding structure according to claim 1, characterized in that a locking means (20) is provided to prevent the lowering of the movable fitting (14) by locking it detachably when the movable fitting (14) is raised to the folded position (P1).

6. The corner prism device for a scaffolding structure according to claim 1, characterized in that the columnar frame (10) and the movable fitting (14) each have a non-circular cross-section, and the movable fitting is externally fitted to the columnar frame so as to be unable to rotate in the circumferential direction and slidable in the longitudinal direction.

7. The columnar frame (10) of the morning glory unit (7) is configured to be attached along the corner support (2C) located at the corner of the support column used to construct the scaffolding structure, and the columnar frame is provided with a lower attachment means (8) for attaching the lower end and an upper attachment means (9) for attaching the upper end. The lower mounting means (8) includes a support bracket (16) that is detachably fixed to the corner support column (2C), and is configured such that the plug portion (8a) at the lower end of the columnar frame is inserted from above into the socket portion (8b) of the support bracket. The upper mounting means (9) is configured to fix the upper end of the columnar frame to the corner support (2C) with the plug portion inserted into the socket portion, as described in 1, 2, 3, 4, 5, or 6, for use as a corner support device in a scaffolding structure.

8. The support bracket (16) is provided with a receiving plate (30) that faces the base end of the expanding / contracting frame (12), including the pivot portion (12a), from below. The corner bell-shaped device for a scaffolding structure according to claim 7, characterized in that the receiving plate (30) is configured to cover the space (S) between adjacent expansion and contraction frames from below when the expansion and contraction frames are expanded radially.

9. The corner prism device for a scaffolding structure according to claim 7, characterized in that the support fitting (16) is provided with pivoting devices (31X, 31Y) on both sides of the socket portion (8b) for pivotally supporting the pivot pieces of the first prism (5) and the second prism (6), respectively.

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