Falling object receiving device for scaffolding

Abstract

To provide a falling object receiving device which receives a falling object falling from a high place of a scaffold construction body.SOLUTION: In a falling object receiving device protruding toward an outside space from a scaffold construction body forming a work space, a pivotally supporting piece (37) provided at a base end portion (8c) of each of a pair of right and left vertical frames (8) constituting the falling object receiving device is pivotally connected in a freely rotatable manner to a pivot (59) of a support bracket (7) fixed to the scaffold construction body, by inserting the pivot into a pivotally supporting hole (38) of the pivotally supporting piece. A temporarily placing table (65) is provided on the support bracket, and assist means (66) is provided on the base end portion of the vertical frame. The assist means is provided with a mounted portion (70) mounted on the temporarily placing table (65) when the vertical frame (8) is in a standing posture (P1) and the pivotally supporting hole (38) is made to face a tip of the pivot (59). A vertical load of the vertical frame is supported by the temporarily placing table.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present invention relates to a falling object receiving device for receiving a falling object that falls from a working space of a scaffolding structure toward an outside space when working at height in the working space of the scaffolding structure at a construction site or the like, and preventing the danger of the object falling toward the ground. [Background technology]

[0002] When working at height in the work space of a scaffolding structure, there is a risk that tools, work equipment, and other items used by workers may accidentally fall toward the outside space outside the work space. Such falling objects may hit people passing by on the ground directly, resulting in personal injury.

[0003] Therefore, the applicant has proposed a falling object receiving device called "Morning Glory" as described in Patent Document 1. This falling object receiving device is composed of a frame body that forms the rectangular outline of the falling object receiving device and a panel plate that closes the opening defined by the frame body, and the frame body is attached by providing pivot pieces at the base ends of a pair of left and right vertical frames and pivoting the pivot pieces to the pivots of support brackets fixed to the scaffolding structure.

[0004] During the pivoting operation, the falling object receiving device is pivoted by bringing the pivot piece at the base end, which is facing downward, close to the support bracket with the vertical frame in an upright position, and pivoting the pivot piece by extrapolating the pivot hole of the pivot piece onto the pivot shaft.

[0005] In this case, a freely extendable arm is rotatably mounted on the vertical frame, which is located on the upward free end side and extends downward, and the lower end of the arm is pivotally connected to a lower support bracket fixed at a lower position of the scaffolding structure.

[0006] The falling object receiving device is then turned around the pivot shaft so that the vertical frame is tilted from an upright position toward the outer space, and the extendable arm is fixed at a predetermined length, so that the falling object receiving device can be used. As a result, the falling object receiving device is fixed in an inclined position that faces diagonally upward from the pivot shaft toward the outer space so that it can easily receive falling objects. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 4658021 [Patent Document 2] Patent No. 5919408 Summary of the Invention [Problem to be solved by the invention]

[0008] As described above, the operation of pivotally connecting the falling object receiving device to the support bracket is performed by an operator holding the vertical frame in an upright position, bringing the downward-facing pivot piece at the base end close to the pivot axis, and extrapolating the pivot hole onto the pivot axis.

[0009] However, the falling object receiving device is not necessarily lightweight, and the vertical frame in particular is a long object, so it is extremely difficult for an operator to manually hold the vertical frame and align the pivot hole with the pivot axis while controlling the movement of the pivot piece at a remote position below. This is an extremely challenging task.

[0010] SUMMARY OF THE PRESENT EMBODIMENTS Therefore, an object of the present invention is to provide an assist device that solves this problem and facilitates pivoting operations, particularly operations for aligning a pivot hole with a pivot shaft. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention provides a fallen object receiving device that is protruded from a scaffolding structure that forms a working space toward an outer space, and the vertical frames are pivotally connected to a pivot of a support bracket fixed to the scaffolding structure by inserting a pivot piece provided at the base end of a pair of left and right vertical frames that constitute the fallen object receiving device into a pivot hole of the pivot piece, so that the vertical frames are rotatably connected between an upright position and an inclined position protruding into the outer space, the vertical frames being pivoted to a pivot of the support bracket fixed to the scaffolding structure between the upright position and the inclined position protruding into the outer space, a temporary stand is provided on the support bracket near the pivot, and an assist means is provided on the base end of the vertical frames near the pivot hole, The assist means is provided with a contact portion and a placement portion. , the vertical frame is in an upright position When the vertical frame is lowered, the abutment portion of the assisting means abuts against the temporary placement table, so that the pivot hole is positioned above the pivot shaft. Then, the vertical frame is lowered from the positioned state. When the pivot hole faces the tip of the pivot shaft, the temporary stand The assist means Placement section is placed The vertical load of the vertical frame is supported by the temporary placement table via the placement portion.

[0012] In a preferred embodiment of the present invention, the assisting means includes, when the vertical frame is in an upright position, (a) a contact portion that abuts against the temporary placement table from above when the pivot hole is positioned axially and upwardly away from the tip of the pivot, (b) a guide portion that extends from the abutment portion and slides against the temporary placement table while in contact with the temporary placement table, thereby guiding the vertical frame to descend in a direction that brings the pivot hole closer to the tip of the pivot, and (c) a placement portion that is placed on the temporary placement table when the vertical frame is lowered to bring the pivot hole into contact with the tip of the pivot, and the placement portion is configured to be moved away from the temporary placement table when the vertical frame is rotated toward the inclined position of the fallen object receiving device with the pivot inserted through the pivot hole to pivot the pivot piece.

[0013] Preferably, the support bracket has a retaining shaft with a male threaded portion arranged alongside the underside of the pivot shaft, and a retaining plate is rotatably and slidably attached to the retaining shaft, and when the retaining plate is rotated around the retaining shaft to assume an upward position, the retaining plate has an insertion hole facing the pivot shaft, and the retaining shaft has a nut screwed onto the male threaded portion, and the pivot hole of the pivot piece in the vertical frame is extrapolated onto the pivot shaft of the support bracket, and the retaining plate is superimposed on the pivot piece by extrapolating the insertion hole onto the pivot shaft, and the retaining plate is fixed by screwing the nut onto the male threaded portion of the retaining shaft. Effect of the Invention

[0014] According to the present invention, while an operator holds the vertical frame 8 with the fallen object receiving device 4 in the upright position P1, the operator can easily pivot the pivot hole 38 of the pivot piece 37 at the base end facing downward to the pivot shaft 59, thereby improving operability. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing an embodiment of the present invention in which a fallen object receiving device is attached to a scaffolding structure. [Diagram 2] 1A and 1B show a fallen object receiving device in a state where the sheet material constituting the closing means is wound up on a roll body, with (A) being a plan view and (B) being a cross-sectional view taken along line A-A. [Diagram 3] 1A and 1B show a fallen object receiving device in a state in which the sheet material constituting the closing means is unwound from a roll body, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional view taken along line B-B. [Figure 4] 1 is a perspective view showing a unit in which a roll body is assembled to a horizontal frame, a vertical frame, and an insertion fitting for mounting the unit to the vertical frame in an exploded state. FIG. [Diagram 5] FIG. 5 is a partially enlarged view of FIG. [Figure 6] 13 is a perspective view showing a state in which the plug-in fittings are fixed to both ends of the unit and face the vertical frame. FIG. [Figure 7]Regarding the relationship between the unit and the vertical frame, (A) is an oblique view showing the state in which the unit is attached to the vertical frame via a plug-in bracket, (B) is a cross-sectional view along line C, and (C) is a cross-sectional view along line D. [Figure 8] 13 is a perspective view showing a state in which a base end frame faces a base end of a vertical frame with a unit attached thereto. FIG. [Figure 9] The base end of the vertical frame is shown, where (A) is an oblique view showing the base end with the engaging portion, the pivot piece, the assist means, and the closure member in an exploded state, (B) is an oblique view showing the state where the closure member is facing the base end with the pivot piece and the assist means attached, and (C) is an oblique view showing the state where the closure member is attached. [Figure 10] Regarding the operation of the closing means, (A) is a perspective view showing a state in which the sheet material is being paid out, and (B) is a perspective view showing a state in which the opening of the frame body has been closed by the sheet material. [Figure 11] Regarding the action of the closing member that closes the entrance of the recessed portion that constitutes the engaged portion, (A) is a plan view showing the state in which the entrance of the recessed portion is closed by the closing member, (B) is an enlarged plan view showing the relationship between the closing member and the stopper in the closed state, and (C) is an enlarged plan view showing the action when the closing member is rotated in the opening direction. [Figure 12] This is an oblique view showing the pivot device of the fallen object receiving device, showing the support pillars, support brackets, and base ends of the vertical frames that constitute the scaffolding structure in an exploded state. [Figure 13] FIG. 1 shows the pivot shaft, retaining shaft, and retaining plate of the pivot device, which are provided on a support bracket fixed to a support pillar, with the retaining plate in a downward position, (A) being an oblique view and (B) being a front view showing the retaining plate in cross section. [Figure 14] The figures show the retaining plate in an upward position, where (A) is an oblique view, (B) is a front view showing the retaining plate in a cross-section moved away from the tip of the pivot shaft, and (C) is a front view showing the retaining plate in a cross-section moved along the retaining shaft by the nut. [Figure 15] 1A and 1B show an assist device for a pivoting operation in a pivoting device, in which FIG. 1A is a perspective view showing a temporary placement table and an assisting means, and FIG. 1B is a perspective view showing the assisting means in an exploded state. [Figure 16] Regarding the action of the temporary placement stand and the assisting means, the base end of the vertical frame in an upright position is shown facing the temporary placement stand, (A) being a front view showing the cross section of the base end, and (B) being a side view. [Figure 17] Regarding the function of the temporary placement table and the assisting means, (A) is a front view showing the state in which the abutment portion of the assisting means abuts against the temporary placement table, and (B) is a front view showing the state in which the vertical frame is lowered by sliding the guide portion of the assisting means against the temporary placement table, thereby placing the placement portion on the temporary placement table. [Figure 18] Regarding the function of the temporary placement table and the assisting means, the state in which the holding plate is overlapped and fixed to the pivot piece by tightening the nut is shown, (A) is a front view, (B) is a side view, and (C) is a side view showing the state in which the vertical frame has been rotated around the pivot axis to assume an inclined position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] (Scaffolding structure and falling object receiving device) As shown in Figure 1, the scaffolding structure 1 is of a known configuration; although the illustration shows a single-tube scaffolding, it may also be a frame scaffolding or other type of scaffolding, and a work space is formed by arranging scaffolding boards 3 in upper and lower tiers on supports 2 extending in the vertical direction.

[0018] A panel-shaped fallen object receiving device 4 is provided at a high position on the scaffolding structure 1, protruding in an overhanging manner toward an outer space Y outside the outer surface X of the work space formed by the supports 2 and scaffolding boards 3.

[0019] The falling object receiving device 4 is formed to have a width dimension W corresponding to the spacing between the pillars 2, 2 in the scaffolding structure 1, and although not shown, a large number of falling object receiving devices 4 are arranged in series along the outer side surface X of the work space, and are usually referred to as morning glories.

[0020] The fallen object receiving device 4 is composed of a frame body 5 forming an approximately rectangular outline and a closing means 6 for freely closing and opening the opening formed by the frame body 5. The frame body 5 is formed of a pair of left and right vertical frames 8, 8 whose base ends are detachably pivoted to a support bracket 7 fixed to the scaffolding structure 1, and a horizontal frame 9 installed between the tip ends of the vertical frames.

[0021] The vertical frame 8 and the horizontal frame 9 are formed from an extruded material such as aluminum, and a pivot device, which will be described later, is provided between the base end portion 8c of the vertical frame 8 and the support bracket 7.

[0022] When mounting the fallen object receiving device 4 on the scaffolding construction 1, with the vertical frame 8 in an upright position, the downward-facing base end of the vertical frame is pivotally connected to the support bracket 7. At this time, the vertical frame 8 is provided with a freely extendable arm 10 which is located on the upward-facing free end side and extends downward so as to be freely rotatable.

[0023] 1 and an inclined position P2 protruding toward the outer space Y as shown by a solid line, by rotating the vertical frame 8 relative to the support bracket 7 via a pivot device. In order to perform the rotation operation from the work space, a fastening fitting 11 is provided on the free end side of the vertical frame 8, and a line such as a rope is fastened to the fastening fitting 11. The vertical frame 8 is rotated from the standing position P1 to the inclined position P2 by an operator letting out the line, and conversely, the vertical frame 8 can be rotated from the inclined position P2 to the standing position P1 by pulling up the line.

[0024] A lower support bracket 7a is fixed to the support pillar 2 below the support bracket 7, and when the vertical frame 8 is in the inclined position P2, the lower end of the arm 10 is connected to the lower support bracket 7a and fixed so that the arm 10 cannot be extended or retracted when at a predetermined length.

[0025] As a result, the vertical frame 8 is supported from below by the arms 10 acting as knee braces, and is thereby maintained in the inclined position P2. As a result, the fallen object receiving device 4 is inclined obliquely upward from the support bracket 7 toward the outer space Y so as to easily receive fallen objects.

[0026] (closing means) As shown in Figures 2 to 11, the closing means 6 is composed of a roll body 12 that is freely rotatable around an axis extending along the horizontal frame 9, and the roll body 12 is formed of a sheet material 13 wound around the axis.

[0027] Thus, the opening 5a defined by the frame 5 is opened by winding the sheet material 13 onto a roll 12 as shown in Fig. 2, and closed by unwinding the sheet material 13 from the roll 12 as shown in Fig. 3. The sheet material 13 is made of a flexible material that can be rolled freely, and preferably has a strength sufficient to prevent objects falling from a high position on the scaffolding construction 1 from penetrating through it.

[0028] (unit) As shown in FIGS. 4 to 7, the horizontal frame 9 and the roll body 12 form a unit 15 by fixing shaft support members 14, 14 provided at both ends of the roll body 12 to the horizontal frame 9.

[0029] In the illustrated example, the roll body 12 is a cylindrical winding core material whose both ends are axially supported by a rotating shaft on a support member 14, but the specific configuration is not important as long as it allows the sheet material 23 to be wound and unwound by rotation.

[0030] The horizontal frame 9 has a substantially semi-cylindrical housing portion 16 that houses the roll body 12 along the longitudinal axis direction, and a flat plate portion 17 is provided on the lower side (the side that faces downward when the vertical frame 8 is in the inclined posture P2), and the seat portion of the shaft support member 14 is fixed to the flat plate portion 17 by rivets or the like. At this time, the shaft support member 14 is fixed to both ends of the flat plate portion 17 leaving extra portions 17a for attaching insert fittings, which will be described later.

[0031] The roll body 12 has a leading edge portion on the payout side of the sheet material 13 extending from the housing portion 16, and a retaining bar 18 for holding the leading edge portion is fixedly attached, and rollers 19 are axially supported on both ends of the retaining bar 18 so as to be freely rotatable.

[0032] Furthermore, the holding bar 18 is provided with an operation bar 20 that is rotatable in the outer circumferential direction. In the illustrated embodiment, the base end of a rotating arm 21 that supports the operation bar 20 is rotatably fitted into a groove formed on the outer periphery of the holding bar 18. The holding bar 18 and operation bar 20 can be formed from an extruded material such as aluminum.

[0033] A pair of left and right vertical frames 8, 8 are formed of groove-shaped members arranged with their groove openings facing each other, and have a first side wall 8a on the upper side (the side that faces upward when the vertical frame 8 is in the inclined posture P2) and a second side wall 8b on the lower side that form both side walls of the groove, and a cutout portion 22 is formed by removing a portion of the first side wall 8a facing the tip of the vertical frame 8, and a slit 23 is formed in the second side wall 8b by cutting it from the tip edge.

[0034] In order to connect the horizontal frame 9 to the tip portions of the vertical frames 8, 8, plug-in fittings 25 are provided at both ends of the horizontal frame 9, and the plug-in fittings 25 are configured to be inserted between the first side wall 8a and the second side wall 8b from the tip of the vertical frame 8. When the plug-in fittings 25 are inserted, the tip edge of the second side wall 8b is configured to be inserted into an insertion groove 24 formed on the underside of the flat plate portion 17 of the horizontal frame 9.

[0035] The insert fitting 25 is formed to have an outward groove shape and has an upper wall 27 and a lower wall 28 bent from the upper and lower edges of the vertical wall 26 that forms the bottom of the groove, and the lower wall 28 is fixed to the excess portion 17a of the flat portion 17 in the horizontal frame 9 by rivets or the like.

[0036] The insertion fitting 25 is provided with a locking member 29 formed by bending a metal rod. The locking member 29 has an insertion portion 29b inserted from the lower wall 28 at the lower end of a rotatable vertical shaft portion 29a penetrating the upper and lower walls 27, 28, a horizontal shaft portion 29c extending from the upper end of the vertical shaft portion 29a toward the vertical frame 8, and a locking portion 29d formed by bending the tip of the horizontal shaft portion 29c downward.

[0037] The vertical shaft portion 29a is biased downward by a spring 30, and the insertion portion 29b is inserted into a through hole 17b formed in the excess portion 17a of the flat portion 17 of the horizontal frame 8 to protrude downward, and the locking portion 29d is fitted to an engagement portion 27a consisting of a notch or hole in the upper wall 27.

[0038] Therefore, when connecting the horizontal frame 9 to the vertical frame 8, the insert fitting 25 is inserted from the tip of the vertical frame 8 between the first side wall 8a and the second side wall 8b, as shown in Figures 6 and 7. At that time, the lock member 29 is pulled up against the spring 30 and the vertical shaft portion 29a is rotated, so that the lock member 29 is placed in a position where it does not interfere with the first side wall 8a. This allows the insert fitting 25 to be inserted until the eaves portion 16a of the housing portion 16 of the horizontal frame 9 is positioned above the notch portion 22 of the first side wall 8a, as shown in Figure 7.

[0039] When the insertion fitting 25 is fully inserted, the tip of the second side wall 8b of the vertical frame 8 is fitted into the fitting groove 24 of the horizontal frame 9. In this state, a lock hole 31 is provided at a predetermined position of the first side wall 8a of the vertical frame 8, into which the lock portion 29d of the lock member 29 can be received.

[0040] When the locking member 29 is pulled up against the spring 30 and rotated, and then lowered by the spring 30 with the locking portion 29d facing the locking hole 31, the locking portion 29d is inserted into the locking hole 31, and the horizontal frame 9 is inseparably connected to the vertical frame 8.

[0041] In the illustrated embodiment, the insertion portion 29b of the locking member 29 is configured to be fitted into the slit 23 formed in the second side wall 8b of the vertical frame 8, thereby making the connection stable and strong.

[0042] 7, the vertical frame 8 forms rails 32 made of protrusions facing the inside of the first side wall 8a and the second side wall 8b, and when the horizontal frame 9 is connected to the vertical frame 8, the rollers 19 at both ends of the holding bar 18 enter between the first side wall 8a and the second side wall 8b and are fitted into the rails 32. This allows the rollers 19 to run along the rails 32 while being guided in the longitudinal direction of the vertical frame 8.

[0043] Furthermore, in the illustrated embodiment, both ends of the holding bar 18 are disposed inside the grooves of the vertical frame 8 together with the rollers 19, so that both side edges of the sheet material 13 of the roll body 12 are positioned inside the grooves. In other words, the sheet material 13 of the roll body 12 is configured to be unwound from the roll body 12 and wound up with both side edges disposed inside the grooves of the groove-shaped members that form the vertical frame 8.

[0044] On the other hand, when connecting the horizontal frame 9 to the vertical frame 8, the swivel arm 21 is raised so that both ends of the operation bar 20 are positioned on the upper side of the first side wall 8a outside the groove of the vertical frame 8, rather than inside. As shown in the figure, the operation bar 20 is formed to have a length that exceeds the width of the opening 5a of the frame body 5 but does not exceed the distance between the bottoms of the grooves of the pair of left and right vertical frames 8, 8, and is configured so that both ends of the operation bar 20 cross the vertical frames 8 and overlap the upper surface of the first side wall 8a when the sheet material 13 is wound up on the roll body 12.

[0045] A locking means is provided for fixing the operation bar 20 in a state in which an operator holds the operation bar 20 to unwind the sheet material 13 from the roll body 12 and closes the opening 5a of the frame body 5 with the sheet material 13 as shown in Fig. 3. The locking means is composed of a locking portion 33 formed by both ends of the operation bar 20 and a locked portion 34 consisting of a recessed portion 35 formed in the vicinity of the base end of the vertical frame 8 as shown in Figs. 8 to 11.

[0046] When the sheet material 13 is unwound by pulling the operation bar 20 and the opening 5a of the frame body 5 is closed, the locking portions 33 at both ends of the operation bar 20 are configured to face the locked portions 34 at that position. Therefore, when the operation bar 20 is rotated via the rotating arm 21 at that position, the locking portions 33 are fitted into the recessed portions 35 and the locking portions 33 and the locked portions 34 are locked, so that the operation bar 20 cannot move in the winding direction of the sheet material 13.

[0047] 8 to 11 are diagrams including technical configurations related to a pivoting device, which will be described later, and will be described together with the configuration of this point.

[0048] 9, the vertical frame 8 has a notch formed by cutting away the first side wall 8a near the base end 8c, and a partition wall 36 that separates the inside of the groove-shaped member is provided from the side edge of the notch facing the roll body 12 to define a recessed portion 35. As a result, when the locking portions 33 at both ends of the operation bar 20 are fitted into the recessed portion 35, they are locked and fixed by the partition wall 36 so as to be prevented from moving toward the roll body 12.

[0049] A downward tongue-shaped pivot piece 37 made of a metal plate such as an iron plate is fixed to the base end 8c of the vertical frame 8, and a pivot hole 38 is provided in the pivot piece 37 for pivotally connecting the vertical frame 8 to the support bracket 7. Although a specific structure for fixing the pivot piece 37 to the base end 8c is not shown, any appropriate means such as rivets or welding may be used.

[0050] The pivot piece 37 is formed integrally with a horizontal plate portion 39 that closes the base end opening of the base end portion 8c by bending a metal plate into an L shape, and by further bending the tip edge portion of the horizontal plate portion 39, a standing portion 40 that spans the opposing edges of the first side wall 8a and the second side wall 8b at the base end portion 8c is formed integrally.

[0051] At the base end 8c, a closing shaft 41 made of a bolt is erected on the first side wall 8a. Support plates 42, 43 made of metal plates such as iron plates are overlapped on the top and bottom of the first side wall 8a and the second side wall 8b, and are fixed with rivets or the like to reinforce the base end 8c.

[0052] The closing shaft 41 is inserted through an upper support plate 42 fixed to the first side wall 8a, and a closing member 44 that closes the entrance of the recessed portion 35 in an openable and closable manner is attached via the closing shaft 41. The closing member 44 is preferably formed from a metal plate such as an iron plate, and is provided with a knob 44a for operation.

[0053] The closure member 44 is attached by inserting the closure shaft 41 into an opening / closing hole 45 provided in the vicinity of the tail end and screwing a nut 46 onto the closure shaft 41. The closure member 44 is freely rotatable about the closure shaft 41 between a closed position where the entrance of the recessed portion 35 is closed and an open position where the entrance is open.

[0054] A stopper 47 for receiving the side edge of the closing member 44 in the closed position is provided on the upper support plate 42. In this case, the opening / closing hole 45 is formed in a shape that prevents the closing member 44 from freely rotating toward the open position when the side edge of the closing member 44 abuts against the stopper 47.

[0055] 11(A) and (B), the opening / closing hole 45 is shaped to have a closing portion 45a through which the closing shaft 41 passes when the closing member 44 is in the closed position and abuts against the stopper 47, and an opening portion 45b through which the closing shaft 41 passes when the closing member 44 is in the open position. In this case, the opening portion 45b is provided at a position parallel to the side edge of the closing member 44 and spaced a distance L1 from the closing portion 45a toward the tail end of the closing member 44, and spaced a distance L2 toward the stopper 47, and a passage 45c through which the closing shaft 41 can move is formed between the closing portion 45a and the opening portion 45b.

[0056] Therefore, as shown in Figure 11 (B), when in the closed position, the side edge 44b of the closing member 44 is abutted along the stopper 47 over a predetermined length, and therefore the closing member 44 cannot rotate freely in either the opening direction F1 or the closing direction F2.

[0057] Therefore, when rotating the closing member 44 toward the open position, as shown in Figure 11 (C), by moving the closing member 44 while moving the opening / closing hole 45 so that the closing shaft 41 moves from the closed portion 45a through the passage 45c toward the opening portion 45b, the side edge portion 44b of the closing member 44 moves away from the stopper 47, and this makes it possible to rotate the closing member 44 around the closing shaft 41 toward the open position, as shown by the dotted line in the figure.

[0058] When the closing member 44 is rotated from the open position to the closed position, it is only necessary to rotate the closing member 44 in the closing direction while moving it in the opposite direction to the above.

[0059] As shown in Figures 2 and 3, the frame body 5 in the above-mentioned falling object receiving device 4 is formed into an approximately gate-like shape by vertical frames 8, 8 and horizontal frames 9, and by pulling the operating bar 20 close to the base end 8c of the vertical frame 8, the opening 5a of the frame body 5 is closed by the sheet material 13 unwound from the roll body 12.

[0060] However, because the fallen object receiving device 4 is attached by pivoting freely via a pivot device to the support bracket 7 fixed to the support column 2 of the scaffolding structure 1, it is inevitable that a small gap will be formed between the base end 8c of the vertical frame 8 and the outer surface X of the working space of the scaffolding structure 1, and if small objects such as bolts, nuts, screws, etc. fall, they may pass through the gap. For this reason, it is preferable to provide a base-end frame that spans the base ends 8c of the pair of vertical frames 8, 8.

[0061] In the illustrated embodiment, the base end frame 48 is formed of a plate-like member made of an extruded material such as aluminum, and includes a band-like closure plate portion 49 that closes the space between the base ends 8c, 8c of the pair of vertical frames 8, 8, as shown in Figures 8 and 10. At this time, fitting members 50 are protruding from both ends of the closure plate portion 49, and the fitting members 50 are fitted between the first side wall 8a and the second side wall 8b of the base end portion 8c, so that the fitting members 50 can be attached in an engaged state.

[0062] As shown in the figure, when the base end side frame 48 is attached to the base end 8c via the fitting member 50, the closure plate portion 49 is configured to be substantially flush with the first side wall 8a, and further, an auxiliary plate portion 51 facing the horizontal frame 9 is integrally formed along the longitudinal direction of the closure plate portion 49.

[0063] The auxiliary plate portion 51 is integrally formed via a bent plate portion 52 provided along the edge of the closure plate portion 49, and is configured so that when the base end side frame 48 is attached to the base end portion 8c, the auxiliary plate portion 51 is connected to the second side wall 8b of the vertical frame 8 in a substantially flush manner. As a result, as shown in Fig. 10(B), when the sheet material 13 is unfurled to close the opening 5a of the frame body 5 and the locking portion 33 of the operation bar 20 is fitted into the locked portion 34, the gap between the operation bar 20 and the holding bar 18 is blocked from below by the auxiliary plate portion 51.

[0064] (action) According to the fallen object receiving device 4 according to the embodiment described above, when the sheet material 13 is wound on the roll body 12 and the worker grasps the operation bar 20 and pulls it toward the base end 8c of the vertical frame 8, the sheet material 13 is unwound from the roll body 12, and the opening 5a of the frame body 5 is closed by the sheet material 13. This allows the fallen object receiving device 4 to receive fallen objects that fall from a high place, achieving its original purpose. When the operation bar 20 is pulled, the roller 19 of the holding bar 18 runs while being guided by the rail 32 inside the grooved member constituting the vertical frame 8, and the unwound tip edge of the sheet material 13 fixed to the holding bar 18 is pulled in an appropriate manner, making it easy to perform the work.

[0065] The locking portion 33 of the operating bar 20 is fitted into the recessed portion 35 of the locked portion 34 while facing the locked portion 34. When the operating bar 20 is pushed downward, the pivot arm 21 pivots in the outer circumferential direction of the holding bar 18, so that the locking portion 33 is easily fitted into the recessed portion 35.

[0066] The entrance of the recess 35 into which the locking portion 33 is fitted is closed by rotating the closing member 44 to the closed position, thereby preventing the locking portion 33 from accidentally escaping. In the closed position, the closing member 44 abuts against a stopper 47 and is locked so as not to move freely toward the open position, as described above.

[0067] Incidentally, when strong winds are predicted due to a worsening of the weather, etc., the sheet material 13 can be wound up onto the roll body 12 and the opening 5a of the frame body 5 can be opened, thereby making the entire fallen object receiving device 4 well-ventilated with only the framework, and thus preventing it from being blown around by strong winds.

[0068] Although the specific configuration for winding up the sheet material 13 by the roll body 12 is not shown in the figure, if a spring that applies a biasing force in the winding direction is provided inside the roll body 12, when the engaging portion 33 of the operating bar 20 is disengaged from the engaged portion 34, the spring will drive and rotate the winding core material of the roll body 12, making it possible to configure the sheet material 13 to be automatically wound up.

[0069] Alternatively, handles may be provided on the rotating shaft at both ends of the winding core of the roll body 12, and the sheet material 13 may be wound onto the roll body 12 by manually rotating the handles. In this case, it is preferable to configure the shaft end of the rotating shaft of the winding core to protrude from the shaft support member 14 and to engage a crank-type handle in a detachable manner to rotate it manually.

[0070] (pivot device) Figures 12 to 17 show a pivot device configured between a support bracket 7 fixed to the scaffolding structure 1 and a base end 8c of a vertical frame 8 in a fallen object receiving device 4 pivotally connected to the support bracket 7.

[0071] 12 to 14, the support bracket 7 is formed from a metal plate such as an iron plate, and has a base portion 53 arranged along the support 2 of the scaffolding structure 1, and has a fastening means 54 made of a clamp metal fitting or the like at the upper end thereof, and a contact holding means 55 at the lower end thereof. As a result, the support bracket 7 is fixed to the support 2 by fastening and fixing the outer periphery of the support 2 with the fastening means 54, and by supporting the fastening contact holding means 55 against the peripheral surface of the support 2.

[0072] In the illustrated example, the support 2 constructs the scaffolding structure 1 via a wedge fastening type fastening means, and the flanges 2a with wedge holes are fixed at intervals in the vertical direction by welding, etc. Therefore, a support part 56 is provided at the lower end of the base plate part 53, which is placed on the flange 2a while being inserted and locked into the wedge hole.

[0073] The base plate portion 53 is provided with an extending base plate portion 57 that protrudes in the front direction (toward the outer space Y of the scaffolding construction 1), and is configured so that the base ends 8c of the vertical frames 8 of the falling object receiving devices 4 are pivotally connected to both sides of the base plate portion 57. That is, for the multiple falling object receiving devices 4 that are successively installed along the outer side surface X of the working space of the scaffolding construction 1 as described above, the base ends 8c, 8c of the respective vertical frames 8, 8 that are adjacent to each other between adjacent falling object receiving devices 4, 4 are arranged on both sides of the base plate portion 57 and pivotally connected thereto.

[0074] Seat plates 58, 58 are fixed to both sides of the base plate portion 57 of the support bracket 7 by welding or the like, and a pivot shaft 59 and a retaining shaft 60 which pass through the base plate portion 57 and the seat plates 58, 58 are fixed so as to be arranged side by side with a gap between them vertically.

[0075] As described later, a pivot hole 38 of a pivot piece 37 provided at the base end 8c of the vertical frame 8 is pivotally supported on the pivot shaft 59. A holding plate 61 for holding the pivot piece 37 is provided on the holding shaft 60 so as to be rotatable and slidable.

[0076] The holding plate 61 is provided at its base end with a spacer 61a facing the seat plate 58, and has a mounting hole 62 penetrating the base end including the spacer 61a, and an insertion hole 63 at its tip end.

[0077] The retaining shaft 60 has a male threaded portion 60a formed with a male screw at a base shaft portion located below the pivot 59, and a shaft end portion 60b having no screw extending in the axial direction from the male threaded portion 60a. A nut 64 is screwed onto the male threaded portion 60a.

[0078] As a result, the retaining plate 61 is extrapolated through the mounting hole 62 so as to be freely rotatable and slidable relative to the retaining shaft 60, and when the retaining plate 61 is rotated around the retaining shaft 60 to assume an upward position, the insertion hole 63 is configured to face the pivot shaft 59.

[0079] Figures 13 and 14 show the function of the retaining plate 61. Figure 13 shows the state before the base end 8c of the vertical frame 8 is pivoted, and the retaining plate 61 is suspended in a state rotated downward from the retaining shaft 60. The nut 64 is positioned near the shaft end 60b. Therefore, the pivot 59 is open with no obstructions around it, and the pivot piece 37 of the base end 8c of the vertical frame 8 can be easily brought close to it.

[0080] As shown in Fig. 14(B), with the pivot hole 38 of the pivot piece 37 fitted onto the pivot 59, the retaining plate 61 is rotated to assume an upward position. From this state, the retaining plate 61 is slid so that the insertion hole 63 is fitted onto the pivot 59 and the nut 64 is fastened to the male threaded portion 60, whereby the pivot piece 37 is held between the seat plate 58 and the retaining plate 61 as shown in Fig. 14(C). At this time, the spacer 61a comes into contact with the seat plate 58, forming a space between the seat plate 58 and the retaining plate 61 that allows the pivot piece 37 to rotate freely.

[0081] (Support device for pivoting work) In order to pivotally connect the falling object receiving device 4 to the support bracket 7 based on the above-mentioned configuration, an operator holds the vertical frame 8 in the upright position P1, moves the pivot piece 37 of the downward-facing base end 8c close to the pivot axis 59, and performs an operation to extrapolate the pivot hole 38 onto the pivot axis 59.

[0082] However, the falling object receiving device 4 is not necessarily lightweight, and in particular the vertical frame 8 is a long object, so it is extremely difficult for an operator to manually hold the vertical frame 8 and align the pivot hole 38 with the pivot axis 59 while controlling the movement of the pivot piece 37 at a remote position below, which is an extremely challenging task.

[0083] Therefore, it is preferable to provide an assist device for facilitating the pivoting operation, particularly the operation of aligning the pivot hole 38 with the pivot shaft 59. An embodiment of the assist device is shown in FIGS.

[0084] In the illustrated embodiment, the support device for the pivoting operation is composed of a temporary placement stand 65 provided near the pivot axis 59 of the support bracket 7 and an assist means 66 provided at the base end 8c of the vertical frame 8.

[0085] The temporary placement stand 65 is formed of a metal plate such as an iron plate that intersects with the base plate portion 57 of the support bracket 7, and is fitted into a slit formed between the base plate portion 53 and the base plate portion 57 and fixed by welding or the like. It has wing portions 67 that are perpendicular to the base plate portion 57, and ear portions 68 formed by bending the extended ends of the wing portions 67 so as to be parallel to the base plate portion 57.

[0086] As mentioned above, the support bracket 7 has pivot devices (pivot shafts 59 and retaining plates 61, etc.) provided symmetrically on both sides of the base plate portion 57 in order to pivotally connect the base ends of the vertical frames 8, 8 of adjacent falling object receiving devices 4, 4. Similarly, the wing portions 67 and ear portions 68 are also formed symmetrically on both sides of the base plate portion 57.

[0087] As a result, as shown in Figure 15, the upper edge portions of the wing portions 67 of the temporary placement stand 65 form a parallel edge stand 65a extending in the axial direction of the pivot shaft 59 above the pivot shaft 59, and the upper edge portions of the ear portions 68 form a cross edge stand 65b extending in a cross direction of the pivot shaft 59 at a position spaced axially and upwardly from the tip of the pivot shaft 59.

[0088] 9 and a support plate portion 42 fixed to the first side wall 8a of the base end portion 8c, and a protruding plate portion 69 that protrudes downward beyond the horizontal plate portion 39 is integrally formed with the support plate portion 42. However, the assist means 66 is not necessarily limited to being constituted by such plate portions 39, 43, and may be constituted by a member other than these.

[0089] At the base end 8c of the vertical frame 8, the support plate portion 42 and the horizontal plate portion 39 are attached and fixed with the lower edge portion 42a of the support plate portion 42 and the lower surface 39a of the horizontal plate portion 39 aligned flush, and a mounting portion 70 is formed by one or both of the lower edge portion 42a and the lower surface 39a.

[0090] The protrusion portion 69 is formed in an approximately triangular shape with an inclined edge portion extending downward from the lower edge portion 42a of the support plate portion 42 and inclining toward the pivot piece 37, the inclined edge portion forming a guide portion 71 and a contact portion 72 formed near the tip of the inclined edge portion.

[0091] (action) The operation of the support device constructed as above is shown in FIGS.

[0092] Prior to the pivoting operation of pivoting the pivot piece 37 at the base end 8c of the vertical frame 8 to the pivot shaft 59, as described above, in order to open up the area around the pivot shaft 59, the retaining piece 61 is rotated downward relative to the retaining shaft 60 and suspended.

[0093] 16, while holding the vertical frame 8 in the upright position P1, the worker lowers the pivot piece 37 of the base end 8c facing downward so as to approach the pivot 59. This operation is performed by lowering the pivot piece 37 so as to enter into the space surrounded by the wings 67 and ears 68 of the temporary placement table 65.

[0094] At this time, if the pivot piece 37 entering the space is made to follow the inside of the ear portion 68, the abutment portion 72 of the assist means 66 will abut against the parallel edge base 65a or the intersecting edge base 65b of the temporary placement stand 65, as shown in Figure 17 (A), and the pivot hole 38 of the pivot piece 37 will be positioned at a predetermined position axially and upwardly spaced from the tip of the pivot 59.

[0095] Due to slight hand shaking when lowering the vertical frame 8, the abutment portion 72 may abut against the parallel edge base 65a or against the cross edge base 65b, but this degree of positional misalignment does not cause any particular problems. Rather, a wide abutment area is formed by the parallel edge base 65a and the cross edge base 65b, making the work easier.

[0096] Next, when the vertical frame 8 is lowered from the positioning state by the abutment, as shown in Fig. 17(B), the guide portion 71 extended from the abutment portion 72 slides while abutting against the cross edge table 65b of the temporary placement table 65. As a result, the pivot piece 37 moves together with the vertical frame 8 while being guided in a direction in which the pivot hole 38 approaches the tip of the pivot shaft 59.

[0097] Then, at the position where the placement portion 70 is guided and moved, it is placed on the cross edge stand 65b of the temporary placement stand 65. As a result, the vertical frame 8 is supported in a state where it is prevented from descending. In this placed state, it is preferable to configure it so that the pivot hole 38 is placed over the tip of the pivot shaft 59 as shown in FIG. 17(B).

[0098] In this way, the positioning operation of abutting the abutment portion 72 against the temporary placement table 66, the operation of lowering it while the direction of movement is guided by the sliding of the guide portion 71, and the operation of supporting the vertical frame 8 in a state where it has stopped descending by placing the mounting portion 70 on the temporary placement table 65 can be carried out in succession, and the operations are simple and easy to perform.

[0099] Then, in a temporary placement state where the mounting portion 70 is placed on the temporary placement stand 65, that is, in a state where the vertical load of the vertical frame 8 is supported by the temporary placement stand 65, the holding plate 61, which has been in a downward position from the holding shaft 60 as described above, is rotated to an upward position, the insertion hole 63 of the holding plate 61 is inserted onto the pivot shaft 59, and the nut 64 is fastened, whereby the pivot piece 37 is pivotally connected to the support bracket 7 as shown in Figures 18(A) and (B), and the pivoting operation is completed. This operation is very easy because it can be performed with the vertical frame 8 in a temporary placement state.

[0100] Meanwhile, while the work process relating to the retaining plate 61 is being carried out, that is, until the final process of the pivoting work is completed, the mounting portion 70 is placed on the temporary placement table 65, and by maintaining the vertical frame 8 in a temporary placement state, the pivoting work is made easier.

[0101] In this regard, as shown in Fig. 18(B), the placement portion 70 is disposed at a predetermined position spaced from the center of the pivot shaft 59 at a position above and close to the support column 2. Therefore, after the pivoting work is completed, as shown in Fig. 18(C), the vertical frame 8 can be rotated toward the inclined position P2 of the fallen object receiving device. In other words, when rotated toward the inclined position P2, the placement portion 70 is configured to be separated from the cross edge stand 65b of the temporary stand 65. [Explanation of symbols]

[0102] 1. Scaffold Construct 2 pillars 2a Flange 3 Scaffolding boards 4 Falling object receiving device 5 Frame 5a opening 6 Closing means 7 Support bracket 7a Lower Support Bracket 8 Vertical Frame 8a First side wall 8b Second side wall 8c Proximal end 9 Horizontal Frame 10 Arm 11 Fastening hardware 12 Roll body 13 Sheet material 14 Axle support member 15 units 16 Housing section 16a Eaves 17 Flat plate part 17a Amarube 17b Through hole 18 Retaining bar 19. Lola 20 Operation Bar 21 Swivel Arm 22 Notch 23 Slit 24 Inset groove 25 Insert fitting 26 Vertical Wall 27 Upper Wall 27a Engagement part 28 Lower Wall 29 Locking member 29a Vertical shaft 29b Insertion part 29c Horizontal shaft 29d Lock Section 30 Spring 31 Lock hole 32 Rail 33 Locking part 34 Locked part 35 Recessed 36 Partition Wall 37 Pivot piece 38 Pivot hole 39 Horizontal plate part 39a Bottom side 40 Standing part 41 Closing shaft 42, 43 Support plate 42a Lower edge 44 Closing member 44a Knob 44b Side edge 45 Opening hole 45a Closed part 45b opening 45c aisle 46 Nut 47 Stopper 48 Base end frame 49 Closing plate 50 Fitting member 51 Auxiliary plate part 52 Bent plate part 53 Circuit Board Section 54 Fixing means 55 Contact and holding means 56 Connection Branch 57 Base plate section 58 Seat board 59 Axis 60 Holding axis 60a Male thread 60b Shaft end 61 Holding plate 61a Spacer 62 Mounting hole 63 Insertion hole 64 Nut 65 Temporary Stand 65a Parallel bench 65b Cross Bench 66 Assistance Methods 67 Wings 68 Ears 69 Veneer section 70 Placement section 71 Guide part 72 Contact part

Claims

1. A fallen object receiving device is provided so as to protrude from a scaffolding which forms a working space towards an outer space, the vertical frames (8) constituting the fallen object receiving device are pivotally connected to a pivot (59) of a support bracket (7) fixed to the scaffolding by inserting pivot pieces (37) provided at base ends (8c) of the pair of left and right vertical frames (8) through pivot holes (38) of the pivot pieces, so that the vertical frames (8) are rotatably connected between an upright position (P1) and an inclined position (P2) protruding into the outer space, A temporary stand (65) is provided on the support bracket in the vicinity of the pivot shaft, and an assist means (66) is provided on the base end of the vertical frame in the vicinity of the pivot hole, and the assist means (66) is provided with a contact portion (72) and a placement portion (70), When the vertical frame (8) is lowered to the upright position (P1), the abutment portion (72) of the assisting means (66) abuts against the temporary placement table (65), thereby positioning the pivot hole (38) above the pivot shaft (59); When the vertical frame (8) is lowered from the positioned state so that the pivot hole (38) faces the tip of the pivot shaft (59), the support portion (70) of the assist means (66) is placed on the temporary placement table (65), and the vertical load of the vertical frame (8) is supported on the temporary placement table (65) via the support portion (70).

2. The assisting means (66) is configured to, when the vertical frame (8) is in the upright position (P1), (a) an abutment portion (72) that abuts against the temporary placement table (65) from above when the pivot hole (38) is positioned axially and upwardly away from the tip of the pivot shaft (59); (b) a guide portion (71) extending from the contact portion (72) and sliding in contact with the temporary placement table (65) to guide the vertical frame downward in a direction in which the pivot hole (38) approaches the tip of the pivot shaft (59); (c) a support portion (70) is provided on the temporary support table (65) when the pivot hole (38) faces the tip of the pivot (59) by lowering the vertical frame, The pivoting device for a fallen object receiving device on a scaffolding as described in claim 1, characterized in that the mounting portion (70) is configured to be moved away from the temporary placement base (65) when the vertical frame (8) is rotated toward the inclined posture (P2) of the fallen object receiving device with a pivot shaft inserted through the pivot hole to pivot the pivot piece (37).

3. A fallen object receiving device is provided protruding from a scaffolding structure forming a working space toward an outer space, the vertical frames (8) constituting the fallen object receiving device are pivotally connected to a pivot (59) of a support bracket (7) fixed to the scaffolding structure by inserting a pivot piece (37) provided at a base end (8c) of the pair of left and right vertical frames (8) constituting the fallen object receiving device into a pivot hole (38) of the pivot piece, so that the vertical frames (8) are pivoted freely between an upright position (P1) and an inclined position (P2) protruding into the outer space, When the vertical frame (8) is lowered to an upright position (P1) and the pivot hole (38) faces the tip of the pivot (59), a placement portion (70) provided at the base end of the vertical frame is placed on a temporary placement table (65) provided on the support bracket (7), The support bracket (7) is provided with a retaining shaft (60) having a male screw portion on the lower side of the pivot shaft, and a retaining plate (61) is provided on the retaining shaft so as to be rotatable and slidable. The holding plate (61) has an insertion hole (63) facing the pivot (59) when the holding plate (61) is rotated about the holding shaft to assume an upward position, The retaining shaft (60) has a nut (64) screwed onto the male thread portion, The pivot connection device of a fallen object receiving device on a scaffolding is characterized in that the pivot hole (38) of the pivot piece of the vertical frame is extrapolated onto the pivot axis (59) of the support bracket (7), and the insertion hole (63) is extrapolated onto the pivot axis (59) to overlap the retaining plate (61) with the pivot piece (37), and the nut (64) is screwed onto the male threaded portion of the retaining shaft to fix the retaining plate (61).

Images