JP7239292B2 - Fall prevention structure for temporary scaffolding and gap closing member used therefor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention structure used in temporary scaffolding assembled at construction sites and the like.

BACKGROUND ART Temporary scaffolding is conventionally installed along a building such as a building at a construction site, and is used by field workers to repair or paint the building. In recent years, so-called wedge binding scaffolds have been adopted, in which wedges are used to connect multiple types of temporary members used in temporary scaffolds (see, for example, “Patent Document 1”).

In the wedge binding scaffolding, as shown in FIG. 11, for example, a plurality of pillars 1 are provided along the outer surface of a building (for example, a general house H). More specifically, columns 51 are erected, for example, in two rows in a direction perpendicular to the outer surface of the general house H. A horizontal member 52 is provided at the position H1. A scaffold board 53 extending along the outer surface of the general house H is attached to the horizontal member 52, as shown in FIG. 11(b). In addition, a plurality of handrails 54 are attached above the scaffolding board 53 between the pillars 51 adjacent to each other in the same direction.

At such construction sites, field workers sometimes work on the sloped roof R, and there is a risk of falling when working on the roof R. Therefore, for example, when the eaves E of the roof R of the general house H are arranged near the height positions H4 and H5 of the support 51 shown in FIG. It is necessary to provide another handrail or the like in the area S at the height positions H5 to H7.

However, if another handrail is to be installed on the side of the roof R, the field worker can install another handrail 55 at the height H5 as shown in FIG. At the height position, the hand of the field worker may not reach, or the eaves E of the roof R may be a hindrance. Therefore, there is a problem that it is difficult to install handrails for fall prevention on the sides of the roof R, that is, in the area S between the height positions H5 to H7 of the pillars 51 .

JP 2015-203299 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fall prevention structure for preventing a site worker working on a temporary scaffold from falling. Another object of the present invention is to provide a gap closing member used in this fall prevention structure.

The fall prevention structure for temporary scaffolding provided by the first aspect of the present invention is a temporary scaffold in which a plurality of pillars are erected along a building, on the side of the sloped roof of the building. a fall prevention structure provided to prevent a worker working on the roof from falling from the temporary scaffolding, wherein the adjacent pillars are erected on the sides of the roof of the building. A cross-shaped member having a pair of diagonal members arranged in an oblique direction so as to intersect between them, and a gap closing member attached to the lower part of the both diagonal members so as to span them , The gap closing member comprises a pipe material having a predetermined length and mounting members formed at both ends of the pipe material. A thin portion having a small thickness is formed at the end portion of the diagonal member, and the mounting member is formed with a recess opening downward, and the mounting member engages the recess with the thin portion. A locking member is provided on the mounting member which is rotatably supported and displaces only downward to maintain the state of attachment to the diagonal member. is characterized by

The gap closing member provided by the second aspect of the present invention is a temporary scaffold in which a plurality of pillars are erected along a building, and is provided on the side of the sloped roof of the building, It is used as a part of a fall prevention structure for preventing a worker working on the roof from falling from the temporary scaffold, and the fall prevention structure is erected on the side of the roof of the building. In addition, it has a cross-shaped member having a pair of diagonal members arranged in an oblique direction so as to cross between the adjacent struts, and is attached to the lower part of both the diagonal members so as to span them. , a gap closing member comprising a pipe member having a predetermined length and mounting members formed at both ends of the pipe member, wherein the mounting member is mounted in the middle of the diagonal member of the cross-shaped member. a thin portion having a small thickness is formed at an end portion of the diagonal member, and a concave portion opened downward is formed in the mounting member; The mounting member is provided with a locking member that is rotatably supported and displaces only downward to maintain the state of attachment to the diagonal member. It is characterized by having

According to the fall prevention structure of the temporary scaffolding of the present invention, a cross-shaped member having a pair of diagonal members arranged in an oblique direction so as to intersect between the posts is provided, and the pair of diagonal members are stretched over the lower part of the member. Since the gap closing members are attached in this way, these members can close not only the side of the temporary scaffolding but also the gap formed below the cross-shaped member. Therefore, it is possible to reliably prevent the worker working on the temporary scaffold from falling.

1 shows an example of a wedge binding type scaffolding to which the fall prevention structure for temporary scaffolding according to the present invention is applied, wherein (a) is a side view and (b) is a front view. It is a figure which shows the attachment state of a support|pillar and a horizontal member. Fig. 3 shows a cross-shaped member of the fall protection structure; FIG. 4 is a diagram showing how the hook portion of the cross-shaped member shown in FIG. 3 is attached to a post; FIG. 4 is a view showing a mounting state of the fixing portion of the cross-shaped member shown in FIG. 3 to the support; It is the figure which looked at the attachment state of FIG. 5 from upper direction. It is a figure which shows the clearance closing member of a fall prevention structure. The figure which looked at the attachment member from the center side of the pipe material is shown, (a) is a figure which the lock member displaced upward, (b) is a figure which the lock member displaced below. FIG. 10 is a diagram showing how the gap closing member is attached to the cross-shaped member; It is the figure which looked at the attachment state of FIG. 9 from upper direction. An example of a conventional wedge binding type scaffolding is shown, (a) is a side view, and (b) is a front view. 12 is a diagram showing a state in which another handrail is attached to the wedge binding scaffolding shown in FIG. 11. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows an example of a wedge binding type scaffolding to which the fall prevention structure for temporary scaffolding according to the present invention is applied, (a) being a side view and (b) being a front view. A wedge-binding scaffolding is installed along a building, such as a general house H, at a construction site.

In this wedge binding type scaffolding, as shown in FIG. 1(a), columns 1 are arranged side by side in a direction toward a general house H (horizontal direction in FIG. 1). In these pillars 1, if the side closer to the general house H is 1A and the side farther from the general house H is 1B, if the near side pillar 1A is extended upward, the pillar 1A will be the eaves E of the general house H. It is provided lower than the eaves E in order to abut on. Further, since the support 1B on the far side is arranged at a position away from the eaves E, it is provided higher than the support 1A. A horizontal member 2 is provided between the columns 1A and 1B so as to bridge them at a height H1 shown in FIG. 1(a). A plurality of horizontal members 2 are arranged in parallel in the depth direction of the drawing.

Here, the support 1 is provided with flanges 3 at predetermined intervals in the vertical direction. As shown in FIG. 2, the flange 3 is formed in a substantially petal shape so as to expand in the horizontal direction, and four hooking holes 4 are formed in the flange 3 in a cross shape. The horizontal member 2 is provided with substantially mouth-shaped connecting portions 5 at both ends thereof, and a wedge 6 is communicated with the hooking hole 4 formed in the flange 3, whereby the column 1 is The horizontal member 2 is tightened to the flange 3 of the .

Returning to FIG. 1(b), a plurality of pillars 1B are arranged side by side in the direction along the general house H (horizontal direction in the figure). A scaffold board 7 is attached to the horizontal member 2 between the pillars 1B and shown in FIG. 1(a) for workers to work or walk. Two handrails 8 are provided at height positions H2 and H3 above the scaffolding board 7 between adjacent posts 1B to prevent field workers on the scaffolding board 7 from falling. .

The fall prevention structure for temporary scaffolding according to the present invention comprises a cross-shaped member 10 for preventing a field worker working on a sloped roof R from falling, and a gap closing member 11 attached to the lower part of the cross-shaped member 10. Consists of

For example, as shown in FIGS. 1(b) and 3, the cross-shaped members 10 are attached at heights H5 to H7, which are sloped portions of the roof R, between the adjacent struts 1B. 3, the gap closing member 11 is omitted for convenience.). The cross member 10 includes a horizontal member 12 extending generally horizontally, and two diagonal members 13 connected to one end side and the other end side of the horizontal member 12, respectively.

The horizontal member 12 is a substantially cylindrical pipe material having a predetermined length, and is slightly shorter than the length (for example, about 1.8 m) between the adjacent struts 1B. As shown in FIGS. 3 and 4, extension members 14 extending downward are joined to the lower ends of the horizontal member 12 by, for example, welding. Each extending member 14 is formed in a flat plate shape, and the oblique members 13 are rotatably supported on the side surfaces thereof by bolts 14a.

The diagonal member 13 has a hook portion 15 with a curved tip, an elongated long portion 16 , and a fixing portion 17 for fixing the cross member 10 to another flange 3 . .

The hook portion 15 is for locking the cross-shaped member 10 to the flange 3 of the column 1. While a part of the hook portion 15 is in contact with the column 1 (see FIG. 4), the hook portion 15 engages the hooking hole 4 of the flange 3 (see FIG. 4). 2).

The long part 16 is for blocking the area S under the horizontal member 12 as much as possible for the purpose of preventing the site worker from falling, and its length is longer than that of the horizontal member 12 . The elongated portion 16 has a cylindrical pipe portion 16a and two thin portions 16b at both ends thereof. The hook portion 15 is joined to the thin portion 16b on one side of the long portion 16 by, for example, welding, and the fixed portion 17 is joined to the thin portion 16b on the other side of the long portion 16. As shown in FIG.

The fixing portion 17 is fixed while being locked to another flange 3 . As shown in FIGS. 5 and 6, the fixing portion 17 includes a Z-shaped member 18 having a substantially Z-shaped plan view connected to the thin portion 16b of the long portion 16, and a Z-shaped member 18 fixed to the Z-shaped member 18. It is composed of a U-shaped member 19 having a substantially U-shaped cross section and a long fixing portion wedge 20 .

An insertion hole 21 for inserting the fixing portion wedge 20 is formed in the planar portion of the U-shaped member 19 . In this fixing portion 17, a U-shaped member 19 is held over the flange 3, and a fixing portion wedge 20 is driven in so as to pass through the latching hole 4 and the insertion hole 21 of the flange 3, so that the flange 3 of the column 1 and the The fixed part 17 is connected.

The gap closing member 11 is provided to close the lower gap P caused by the crossing diagonal members 13 as much as possible. As shown in FIG. 7 , the gap closing member 11 includes a pipe member 25 having substantially the same length as the horizontal member 12 and a pair of mounting members 26 provided at both ends of the pipe member 25 . As shown in FIG. 1(b), the gap closing member 11 is positioned at approximately the same height as the height H5 of the strut 1 so as to extend over the lower portions of the two diagonal members 13 of the cross member 10. can be installed in the vertical position.

FIG. 8 is a view of the mounting member 26 as seen from the center side of the pipe material 25. The mounting member 26 is formed in a substantially polygonal flat plate shape, and in the center of the mounting member 26, a In addition, a recess 27 with an open bottom is formed (see FIG. 8(a)).

The mounting member 26 has a flat portion 26a on one side with the concave portion 27 in the center (left side in FIG. 8A), and the pipe material 25 is connected in the orthogonal direction, and a flat portion on the other side with the concave portion 27 in the center. A locking member 28 is provided at 26b (on the right side in FIG. 8A) to prevent the gap closing member 11 from coming off the diagonal member 13. As shown in FIG.

The lock member 28 is formed with two substantially V-shaped engagement holes 29, and two projecting pieces 30 formed on the mounting member 26 are loosely fitted into the engagement holes 29, thereby The locking member 28 is rotatable with respect to the mounting member 26 . In addition, the locking member 28 is provided on the surface side facing each mounting member 26 .

Next, a brief description will be given of the procedure for attaching the cross-shaped member 10 and the gap closing member 11 between the struts 1B.

First, a field worker holds the lower part of one of the diagonal members 13 and lifts the diagonal member 13 upward. A hook portion 15 provided at one end of the member 12 is inserted. Next, the field worker holds the lower portion of the other diagonal member 13 and inserts the hook portion provided at the other end of the horizontal member 12 into the latching hole 4 of the flange 3 of the right column 1B adjacent to the left column 1B. 15 is inserted.

Next, the U-shaped member 19 of the fixing portion 17 provided at one end of the diagonal member 13 is sandwiched against another flange 3 provided below the flange 3 of the left support 1B. Next, the fixing portion wedge 20 is inserted into the engaging hole 4 of the other flange 3 and the insertion hole 21 of the U-shaped member 19, and hammered with a hammer or the like to attach the fixing portion wedge 20 to the U-shaped member 19. fixed. As a result, the other flange 3 and the fixing portion 17 are tightly connected.

After that, similarly, the fixing portion wedge 20 of the fixing portion 17 of the diagonal member 10 is fixed to the U-shaped member 19 with respect to the other flange 3 provided below the flange 3 of the right strut 1, The other flange 3 and the fixed part 17 are tightly connected. Thus, the cross-shaped member 10 is attached between the struts 1B.

Next, the gap closing member 11 is attached to both diagonal members 13 of the cross member 10 . First, as shown in FIG. 8A, the locking member 28 of one mounting member 26 is displaced upward to open the concave portion 27 . With the recess 27 left open, the mounting member 26 is hooked on the thin portion 16b of one diagonal member 13, as shown in FIGS.

After that, as shown in FIG. 8(b), the lock member 28 is displaced downward to lock the gap closing member 11 so that it does not drop off from the diagonal member 13. Then, as shown in FIG. In this manner, one attachment member 26 of the gap closing member 11 is attached to one diagonal member 13 . Next, the other mounting member 26 on the opposite side is also mounted to the thin portion 16b of the other diagonal member 13 in the same manner.

In this manner, the gap closing member 11 is attached so as to extend over both diagonal members 13 . In this case, the thin portion 16b of the elongated portion 16 of the diagonal member 13 is formed to have a small thickness, and the mounting member 26 of the gap blocking member 11 has a flat portion 26a on one side with the concave portion 27 in the center. Since the material 25 is connected, as shown in FIG.

As described above, the cross-shaped member 10 can be easily attached to the strut 1B, and the gap closing member 11 can be securely attached to the cross-shaped member 10 . In this case, the site worker can easily attach the scaffolding board 7 at heights H5 to H7 even when he is on the scaffold board 7 shown in FIG. 1(b).

In addition, the fall prevention structure according to the present embodiment can appropriately block the gaps S at the heights H5 to H7, and can reliably prevent field workers working on the roof R from falling. The cross member 10 has a substantially triangular gap P at its lower portion due to the diagonal crossing of the pair of diagonal members 13 . Therefore, the gap P at that portion can also be satisfactorily closed.

The scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the shape, size, quantity, etc. of the cross-shaped member 10 and the gap closing member 11 in the above embodiment are not limited to those in the above embodiment, and can be appropriately changed in design. Further, the fall prevention structure of the present invention is applied to, for example, a wedge-tying scaffolding along a general house, but it may be applied to a wedge-tying scaffolding along other buildings as well as ordinary houses. Further, the fall prevention structure according to the present invention may be used, for example, as a handrail for a prefabricated mobile scaffolding, or may be used between a form shoring and a main scaffold provided on its outer periphery.

Further, for example, in the above-described embodiment, the support column 1 is provided with the flange 3, but instead of the flange 3, for example, a U-shaped pocket body is provided when viewed from above, and each temporary member is connected to this pocket body. good too.

1 Post 3 Flange 10 Intersecting member 11 Gap closing member 12 Horizontal member 13 Diagonal member 15 Hook portion 16 Long portion 16a Pipe portion 16b Thin portion 17 Fixed portion 25 Pipe member 26 Mounting member 27 Recess 28 Lock member R Roof

Claims (2)

In a temporary scaffold in which a plurality of pillars are erected along a building, it is provided on the side of the sloped roof of the building, and a worker working on the roof falls from the temporary scaffold. A fall prevention structure for preventing
a cross-shaped member having a pair of diagonal members arranged diagonally so as to intersect between the adjacent pillars, standing on the side of the roof of the building;
a gap closing member attached to the lower part of both diagonal members so as to bridge them;
is composed by
The gap closing member is
a pipe material having a predetermined length;
and mounting members formed at both ends of the pipe material,
The mounting member is
attached in the middle of the diagonal member of the cross-shaped member,
A thin portion having a small thickness is formed at an end portion of the diagonal member,
The mounting member is formed with a recess opening downward,
The attachment member is attached to the diagonal member by hooking the recess on the thin portion,
The mounting member includes:
A fall prevention structure for a temporary scaffold, comprising a locking member that is rotatably supported and displaces only downward to maintain a state of attachment to said diagonal member. In a temporary scaffold in which a plurality of pillars are erected along a building, it is provided on the side of the sloped roof of the building, and a worker working on the roof falls from the temporary scaffold. used as part of a fall protection structure to prevent
The fall prevention structure is
a cross-shaped member having a pair of diagonal members arranged diagonally so as to intersect between the adjacent pillars, standing on the side of the roof of the building;
A gap closing member comprising a pipe member having a predetermined length attached to the lower portions of both diagonal members so as to bridge them, and mounting members formed at both ends of the pipe member,
The mounting member is
attached in the middle of the diagonal member of the cross-shaped member,
A thin portion having a small thickness is formed at an end portion of the diagonal member,
The mounting member is formed with a recess opening downward,
The attachment member is attached to the diagonal member by hooking the recess on the thin portion,
The mounting member includes:
A gap closing member comprising a locking member that is rotatably supported and displaces only downward to maintain a state of attachment to said diagonal member.

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