Fall prevention device for falling objects on scaffolding

Abstract

To provide an object fall prevention device for a scaffold having a gap shielding device capable of reliably shielding a narrow gap that is formed in a state that a falling object receiving device is attached to the scaffold structure.SOLUTION: A shielding device (18) is constituted of a shielding sheet (19) that extends toward a scaffold structure (1) from an attachment base (17) of a base end of the falling object receiving device(4). The shielding sheet (19) includes: a base (20) attached to the attachment base; and a bendable and deformable shielding part (21) extending from the base. The shielding part (21) is formed to cover a gap (S) in a bent state and is configured to form a bend (21a) facing the scaffold structure in a gap (S) and an upright (21b) extending upward along the scaffold structure.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a device for receiving a falling object from a working space of a scaffolding structure at a construction site or the like toward an outside space when working at height in the working space, 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 present applicant has proposed a falling object receiving device called "Morning Glory" as described in Patent Document 1. This falling object receiving device is installed to protrude from the scaffolding construction toward the outer space, and is fixed in a position with its free end facing diagonally upward so as to easily receive fallen objects. In addition, soundproof sheets, soundproof panels, and other covering members may be selectively attached to the outer surface of the work space facing the outer space of the scaffolding construction for soundproofing, etc., depending on the site.

[0004] However, when work needs to be suspended due to bad weather, for example, the fallen object receiving device is in danger of being blown around by strong winds, so it is desirable to configure it so that it can be stored. For this reason, as in Patent Document 1, the fallen object receiving device is configured so that its base end is pivoted to the scaffolding structure via a horizontal shaft and its position can be changed between an operating position in which the free end protrudes toward the outside space and a stored position in which the free end faces upward and is superimposed on the vertical surface of the scaffolding structure.

[0005] However, because the fallen object receiving device is attached and fixed to the support pillars of the scaffolding structure via a bracket having a pivot structure, it is inevitable that a small gap will occur between the edge of the base end of the fallen object receiving device and the outer surface of the work space of the scaffolding structure, and if small items such as bolts, nuts, or screws fall, they may pass through the gap. As a result, the original purpose cannot be fully achieved.

[0006] For this reason, the applicant has proposed an invention in Patent Document 2 in which a shielding device having a shielding member for covering the gap is provided at the base end of the falling object receiving device. [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] According to the device proposed in Patent Document 2, any object that a worker accidentally drops into the outer space is received by the falling object receiving device while it is falling. At this time, the mounting base at the base end of the falling object receiving device is provided with a shielding member that covers the above-mentioned gap, so even small objects such as screws cannot pass through and can be received appropriately.

[0009] Furthermore, when not in use, the shielding member can be folded by rotating toward the mounting base at the base end of the falling object receiving device and stacked on top of the mounting base, making it convenient for storage and transportation.

[0010] However, in the embodiments of the invention in Patent Document 2, the shielding member is pivotally connected to the mounting base at the base end of the falling object receiving device by a hinge-type pivoting means, so there is still room for improvement from the standpoint of reducing production costs.

[0011] In the case of Patent Document 2, the shielding member is configured to be freely rotatable, which has the advantage that the gap can be covered simply by changing the angle at which the shielding member stands depending on the size of the gap. However, on the other hand, if the shielding member's standing position becomes close to a vertical position, there is a risk that it will be rotated toward the mounting base at the base end of the load receiving device and fall over when blown by wind, which means that there is a risk of the gap being opened up.

[0012] Therefore, an object of the present invention is to provide an apparatus that solves the above-mentioned problems by revising the invention proposed in Patent Document 2. [Means for solving the problem]

[0013] Therefore, in order to solve the above-mentioned problems, the present invention is configured as a means comprising a falling object receiving device that protrudes from a scaffolding structure that forms a work space toward the outer space, and a shielding device that covers the gap between the base end of the falling object receiving device and the scaffolding structure, wherein the shielding device is composed of a shielding sheet that extends from a mounting base of the base end of the falling object receiving device toward the scaffolding structure, and the shielding sheet comprises a base attached to the mounting base and a shielding portion that extends from the base and can be freely bent and deformed upwardly to fit the scaffolding structure.

[0014] In this case, the shielding portion is formed to cover the gap in a bent and deformed state, and inside the gap, it forms a bent portion facing the scaffolding structure and an upright portion extending upward along the scaffolding structure.

[0015] It is preferable that the base of the shielding sheet is removably attached to the mounting base by a releasable fastening means.

[0016] In addition, it is preferable that the shielding sheet is provided with anchoring means on at least both left and right sides of the portion near the tip of the shielding portion, which can be anchored in a freely detachable manner to a component member of the scaffolding structure. Effect of the Invention

[0017] According to the present invention, a shielding device 18 is provided that can cover the gap S formed between the outer surface X of the working space in the scaffolding construction 1 and the base end of the fallen object receiving device 4.

[0018] In this case, the shielding device 18 constitutes a shielding section 21 extended from a base 20 attached to a mounting base 17 at the base end of the falling object receiving device 4, and is configured to cover the gap S by bending and deforming the shielding section 21. Therefore, even if gaps S1, S2 of different sizes exist depending on the site, it can be flexibly adapted and can always cover the gaps in a stable and suitable state. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view showing an example of a scaffolding structure provided with a conventional fallen object receiving device. [Diagram 2] FIG. 1 is a perspective view showing a conventional falling object receiving device. [Diagram 3] 1A and 1B show a pivotal portion of a conventional falling object receiving device, in which FIG. [Figure 4] FIG. 1 is a perspective view showing a base end portion of a conventional falling object receiving device. [Diagram 5] FIG. 1A is a perspective view showing a state before a shielding device is attached to a base end portion of a falling object receiving device according to a first embodiment of the present invention, and FIG. 1B is a perspective view showing a detachable fastening means. [Figure 6] Regarding the first embodiment, (A) is an oblique view showing the state in which the shielding device is attached to the base end of the falling object receiving device, and (B) is an oblique view showing the part where the base of the shielding sheet is attached to the mounting base by an attachment means. [Figure 7]FIG. 1 is a side view showing the state in which the first embodiment is used on a scaffolding construction to which a sheet material such as a soundproof sheet is attached. [Figure 8] FIG. 1 is a perspective view showing a state in which the first embodiment is used in a scaffolding construction to which a sheet material such as a soundproof sheet is attached. [Figure 9] FIG. 1 is a side view showing the first embodiment in use when used on a scaffolding construction to which a panel material such as a soundproof panel is attached. [Figure 10] 11A is a perspective view showing a state before a shielding device is attached to a base end portion of a falling object receiving device according to a second embodiment of the present invention, and FIG. 11B is a perspective view showing an enlarged portion of the shielding device after it is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] (Configuration of 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 frame scaffolding, it could also be a single-tube scaffolding or other 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.

[0022] 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.

[0023] The fallen object receiving device 4 is formed to have a width dimension W corresponding to the interval between the supports 2, 2 in the scaffolding construction 1, is connected along the outer side surface X of the work space, and is usually called a morning glory. Note that the fallen object receiving device 4 shown in the figure is formed in the shape of a rectangular panel in a plan view, but is formed in the shape of a triangular panel or the like at the corner portions of the scaffolding construction 1.

[0024] Each of the connected falling object receiving devices 4 is attached and used in a position (operating position) inclined upward from its base end to its free end so as to make it easier to receive objects falling from above. However, when work needs to be interrupted due to bad weather or the like, there is a risk of them being blown around by strong winds. Therefore, by rotating as shown by the arrow U in FIG. 1, the free end is moved in an upright direction, and the falling object receiving device 4 is stored in a position (storage position) superimposed on the outer surface X of the work space.

[0025] 2, the fallen object receiving device 4 is pivotally connected to upper pivot means 5 and lower pivot means 6 which are fixedly attached to the supports 2 of the scaffolding construction 1. That is, both ends in the width direction of the base end of the fallen object receiving device 4 are pivotally connected to the upper pivot means 5, and support means 7, 7 extending downward from both ends on the free end side of the fallen object receiving device 4 are pivotally connected to the lower pivot means 6.

[0026] 2 and 3, the base end of the fallen object receiving device 4 is constructed by protruding pivot pieces 9 from the base ends of side frames 8, 8 arranged on both sides in the width direction, and connecting the base ends of the side frames 8, 8 with a base frame 10. The base frame 10 is formed, for example, from an extruded aluminum material, and is provided with a flat plate portion 10a located between the pivot pieces 9, 9 and facing the outer surface X of the work space.

[0027] Therefore, the flat plate portion 10a is formed so that the gap S between the outer surface X of the working space of the scaffolding structure 1 and the base end of the fallen object receiving device 4 is as narrow as possible, but since the fallen object receiving device 4 is configured to be freely rotatable, the formation of a gap S as shown in the figure is unavoidable.

[0028] 3, the upper pivot means 5 is configured with a support bracket 13 having a fastening means 11 such as a clamp metal fitting at its upper part and a locking means 12 at its lower part, and a pivot 14 is provided on the support bracket 13. As shown in the figure, the fastening means 11 is detachably fixed to a predetermined position of the support column 2, and the locking means 12 is supported on the side of the support column 2 while being mounted on a beam material 2a fixed to the support column 2. The fallen object receiving device 14 is pivotally connected to the upper pivot means 5 by inserting the pivot 14 through the pivot piece 9.

[0029] In the illustrated example, the lower pivot means 6 has the same configuration as the upper pivot means 5, and is detachably fixed to a predetermined position of the support column 2 below the upper pivot means 5. The lower end of the support means 7 is pivotally connected to the lower pivot means 6. The support means 7 is composed of a telescopic rod as shown in the illustration, or another type of rod, and the upper end of the support means 7 is pivotally connected to the side frame 8 so as to be rotatable.

[0030] (Covering material) As described above, a covering member may be attached to the outer surface X of the working space of the scaffolding structure 1 depending on the site. The covering member may be a sheet material such as a soundproof sheet or a thick panel material such as a soundproof panel, and forms part of the scaffolding structure 1.

[0031] Therefore, naturally, as shown in Figure 3 (B), the gap S1 formed between the scaffolding structure 1 provided with the sheet material 15 and the base end of the drop receiving device 4 (the tip edge of the flat portion 10a) and the gap S2 formed between the scaffolding structure 1 provided with the panel material 16 and the base end of the drop receiving device 4 (the tip edge of the flat portion 10a) will be different in size, S1 > S2.

[0032] (shielding device) The present invention provides a shielding device 17 that can cover the gap S formed between the outer surface X of the work space in the scaffolding structure 1 and the base end of the fallen object receiving device 4 (in the illustrated embodiment, the tip edge of the flat portion 10a of the base frame 10), and in particular, is intended to be a device that can respond to changes in the size of the gap S as described above and always reliably seal the gap.

[0033] (First embodiment) Figures 4 to 9 show a first embodiment of the present invention. As shown in Figure 4, the falling object receiving device 4 forms a base end portion similar to that of the prior art described above based on Figures 2 and 3, and a flat plate portion 10a is extended from a base frame 10 that connects side frames 8, 8.

[0034] Therefore, in the first embodiment, the flat plate portion 10a forms the mounting base 17, and the shielding device 18 is provided on the mounting base 17. As shown in FIG.

[0035] The shielding device 18 is composed of a shielding sheet 19 extending from the mounting base 17 toward the scaffolding construction 1. In this case, the mounting base 17 is formed to have a width W1 (see FIG. 6) that is approximately equal to the width W (see FIG. 1 and FIG. 2) of the fallen object receiving device 4, and the shielding sheet 19 is formed to have a size that covers almost the entire width of the mounting base 17, that is, as shown in FIG. 6, the shielding sheet 19 is also formed to have the same width W1.

[0036] The shielding sheet 19 includes a base 20 that is attached to the mounting base 17, and a bendable shielding portion 21 that extends from the base 20. The shielding sheet 19 can be made of any material selected from a resin sheet such as polyethylene, a cloth sheet such as a woven fabric, a mesh sheet, and other sheet materials.

[0037] 5 and 6, the base 20 of the shielding sheet 19 is detachably attached to the mounting base 17 by a detachable fastening means 22. In the illustrated embodiment, the fastening means 22 is composed of a stopper 23 erected by inserting a bolt shaft into the mounting base 17 and fastening a nut, and a locking hole 24 provided in the base 20 of the shielding sheet 19. Therefore, with the stopper 23 inserted into the locking hole 24, the base 20 of the shielding sheet 19 is attached to the mounting base 17 by rotating the retaining piece 23a of the stopper 23 to lock it in a retained state.

[0038] When the base 20 is attached to the mounting base 17, the shielding sheet 19 is extended so as to protrude from the mounting base 17, leaving the shielding portion 21 in a free state, i.e., in a state in which it can be freely bent and deformed, and mooring means 25 consisting of eyelets are provided on at least both the left and right sides near the tip of the shielding portion 21.

[0039] 7 and 8 show a state in which the shielding device 18 is used, in which a sheet material 15 such as a soundproof sheet is provided on the outer surface X of the working space of the scaffolding construction 1. In this case, a gap S1 is formed between the base end portion (flat plate portion 10a of the base frame 10) of the fallen object receiving device 4 and the scaffolding construction 1, and the gap S1 is covered by the bent and deformed shielding portion 21 of the shielding sheet 19.

[0040] As shown in the figure, the shielding portion 21 is bent and deformed to form a bent portion 21a facing the sheet material 15 and an upright portion 21b extending upward along the sheet material 15 within the gap S1, thereby closing the gap S1.

[0041] In this state, the mooring means 25 provided on both the left and right sides of the standing portion 21b face the support 2 of the scaffolding structure 1, so that the mooring means 25 can be detachably moored to the support 2 by using a rope such as a string (not shown), a clip, or other known mooring aid, thereby maintaining the standing position of the standing portion 21b. Note that the mooring means 25 may be moored to the support 2, or to a grommet hole of the sheet material 15, etc.

[0042] 9 shows a state in which the shielding device 18 is in use, in which a panel material 16 such as a soundproof panel is provided on the outer surface X of the working space of the scaffolding construction 1. In this case, a gap S2 is formed between the base end of the fallen object receiving device 4 (flat plate portion 10a of the base frame 10) and the scaffolding construction 1, and the gap S2 is covered by the bent and deformed shielding portion 21 of the shielding sheet 19. In this case, the gap S2 is smaller than the above-mentioned gap S1.

[0043] As described with reference to FIG. 8, the shielding portion 21 is bent and deformed, and inside the gap S2, Panel material 16 A bent portion 21a facing the Panel material 16 The gap S2 is closed by forming an upright portion 21b extending upward along the

[0044] At this time, the standing portion 21b is anchored to the pillars 2 of the scaffolding structure 1 and other components of the scaffolding structure 1 via anchoring means 25 on both the left and right sides, thereby maintaining the standing posture.

[0045] In this way, the shielding device 18 is configured to close the gap S by bending and deforming the shielding portion 21 of the shielding sheet 19, so that it can freely respond to any of the gaps S1 and S2 where S1 > S2 as described above, and can always close the gap appropriately.

[0046] Furthermore, as a standard for temporary scaffolding, the fallen 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, so for the shielding device 18, if the width W1 of the shielding sheet 19 is formed to be approximately the same width and mooring means 25 is provided on both the left and right sides near the tip of the shielding portion 21, it becomes possible to position the mooring means 25 of the standing portion 21b formed by bending deformation close to the pillar 2, making mooring easier.

[0047] Second embodiment 10 shows a second embodiment of the present invention. In the second embodiment, the configuration of the base end of the falling object receiving device 4 is different from that of the first embodiment, but other configurations are similar to those of the first embodiment, so the same components are given the same reference numerals and the above description is incorporated herein.

[0048] In the second embodiment, a frame material formed with a U-shaped cross section is used for the base frame 10 connecting the base ends of the side frames 8, 8, and a flat plate portion 10b is formed by the upper plate-like portion, and the flat plate portion 10b is used as a mounting base 17 to provide a shielding device 18. As explained in the first embodiment, the shielding device 18 is composed of a base 20 attached to the upper surface of the mounting base 17 via an attachment means 22, and a shielding sheet 19 equipped with a bendable and deformable shielding portion 21.

[0049] (Other embodiments) In both the first and second embodiments described above, the mounting base 17 is formed from a part of the base frame 10, but it goes without saying that the present invention is not limited to such a configuration, and the mounting base 17 may be formed from a separate member provided on the base frame 10, or even from a member unrelated to the base frame 10. [Explanation of symbols]

[0050] 1. Scaffold Construct 2 pillars 2a Beam material 3 Scaffolding boards 4 Falling object receiving device 5 Upper pivoting means 6 Lower pivoting means 7 Support means 8 Side Frame 9 Pivot piece 10 Base frame 10a Flat plate part 11 Fixing means 12 Locking means 13 Support bracket 14 Axis 15 Sheet material 16 Panel material 17 Mounting base 18 Shielding device 19 Shielding sheet 20 base 21 Shield part 21a Bend part 21b Standing part 22 Attachment means 23 Fastener 23a Stopper piece 24 Locking hole 25 Mooring means

Claims

1. A scaffolding structure (1) that forms a working space and has a covering member selected from a sheet material (15) and a panel material (16) attached to its outer surface, and a panel-shaped fallen object receiving device (4) that protrudes from the scaffolding structure (1) toward the outer space, A flat plate portion (10a) facing the outer surface of the working space is provided at the base end of the falling object receiving device (4), and the flat plate portion (10a) is used as a mounting base (17) to form a shielding device (18), thereby covering the gap (S) between the flat plate portion (10a) and the covering member, thereby preventing the falling of falling objects. The gap (S) is a gap (S2) when the covering member is a panel material (16) and a gap (S1) when the covering member is a sheet material (15), such that S2<S1, whereas the shielding device (18) is configured to cover the gap in response to either of the gaps (S2) and (S1); The shielding device (18) is composed of a shielding sheet (19) extending from the mounting base (17) toward the scaffolding structure (1), The shielding sheet (19) includes a base (20) attached to the mounting base (17) and a shielding portion (21) extending from the base and capable of bending upward to fit the scaffolding structure, and is detachably attached to the mounting base (17) by an attachment means (22) in a state where the base (20) is superimposed on the mounting base (17); The shielding portion (21) is formed to cover the gap (S) in a bent and deformed state, and is configured to form, inside the gap (S), a bent portion (21a) facing the scaffolding structure and an upright portion (21b) extending upward along the scaffolding structure, thereby preventing falling objects from falling onto scaffolding.

2. 2. A device for preventing falling objects from falling on a scaffold as described in claim 1, characterized in that the shielding sheet (19) is provided with mooring means (25) on at least both left and right sides near the tip of the shielding portion (21) so that the mooring means can be freely attached and detached to constituent members of the scaffolding structure.

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