JP2020056247A - Fall prevention structure of temporary scaffold, and gap closing member used for the same - Google Patents

Abstract

To provide a fall prevention structure for preventing a site worker working on a temporary scaffold from falling.SOLUTION: A fall prevention structure of a temporary scaffold in this invention is provided in a temporary scaffold in which a plurality of posts 1B are erected and prevents a site worker from falling from a temporary scaffold. The fall prevention structure is composed of: crossing members 10 including a pair of diagonal members 13 disposed in a diagonal direction so as to cross between neighboring posts 1B; and a gap closing member 11 attached under both diagonal members 13 so as to bridge them.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fall prevention structure used in a temporary scaffold assembled at a construction site or the like.

  2. Description of the Related Art Conventionally, a temporary scaffold is provided along a building such as a building at a construction site, and is used by a site worker to repair or paint the building. In recent years, a so-called wedge-binding scaffold, in which a wedge is used to connect a plurality of types of temporary members used for a temporary scaffold, has been adopted (for example, see Patent Document 1).

  In the wedge-tied scaffold, as shown in FIG. 11, for example, a plurality of columns 1 are provided along the outer surface of a building (for example, a general house H). More specifically, the columns 51 are erected, for example, in two rows in a direction orthogonal to the outer surface of the general house H, and the columns 51 adjacent to each other in the same direction have, for example, a height as shown in FIG. The horizontal member 52 is provided at the position H1. As shown in FIG. 11B, a scaffold plate 53 extending in a direction along the outer surface of the general house H is attached to the horizontal member 52. In addition, a plurality of handrails 54 are attached to the columns 51 adjacent to each other in the same direction and above the scaffold plate 53.

  In such a construction site, the site worker sometimes works on the sloped roof R, but there is a possibility that the work on the roof R may cause a crash. 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 region S at the height positions H5 to H7.

  However, if another handrail is to be attached to the side of the roof R, for example, as shown in FIG. 12, the site worker can attach another handrail 55 at the height position H5. At the height position, the hand of the site worker cannot reach or the eaves E of the roof R are in the way. Therefore, there is a problem that it is difficult to install handrails for preventing fall on the side of the roof R, that is, in the region S at the height positions H5 to H7 of the columns 51.

JP-A-2005-203299

  The present invention has been conceived under the circumstances described above, and 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. It is another object of the present invention to provide a gap closing member used in the fall prevention structure.

  A fall prevention structure for a temporary scaffold provided by the first aspect of the present invention is provided on a temporary scaffold on which a plurality of columns are erected, and a fall prevention structure for preventing a worker from falling from the temporary scaffold. An intersecting member having a pair of diagonal members arranged obliquely so as to intersect between the adjacent columns, and a gap obstruction attached to a lower portion of the two diagonal members so as to bridge them. And a member.

  In the fall prevention structure for a temporary scaffold according to the present invention, the gap closing member includes a pipe member having a predetermined length, and mounting members formed at both ends of the pipe member. It is good to be attached in the middle of the above-mentioned diagonal material of a member.

  In the fall prevention structure for a temporary scaffold according to the present invention, a thin portion having a small thickness is formed at an end of the diagonal member, and a concave portion that is opened downward is formed in the mounting member, The attachment member may be attached to the diagonal member by hooking the concave portion to the thin portion.

  In the fall prevention structure for a temporary scaffold according to the present invention, it is preferable that the attachment member is provided with a lock member that is rotatably supported and holds an attached state to the diagonal member.

  The gap closing member provided by the second aspect of the present invention is provided on a temporary scaffold on which a plurality of columns are erected, and as a part of a fall prevention structure for preventing a worker from falling from the roof. Used, the fall prevention structure has a cross-shaped member having a pair of diagonal members arranged in an oblique direction so as to intersect between the adjacent columns, It is characterized by being attached so as to be bridged.

  According to the structure for preventing a temporary scaffold from falling according to the present invention, a cross-shaped member having a pair of diagonal members arranged obliquely so as to intersect between the columns is provided, and a pair of diagonal members is laid over the lower part thereof. Since the gap closing members are attached as described above, these members can close not only the side of the temporary scaffold but also the gap generated below the cross-shaped member. Therefore, it is possible to reliably prevent a worker who works on the temporary scaffold from falling.

1A and 1B show an example of a wedge-tied scaffold to which a temporary scaffold fall prevention structure according to the present invention is applied, wherein FIG. 1A is a side view and FIG. 1B is a front view. It is a figure which shows the attachment state of a support | pillar and a horizontal member. It is a figure which shows the cross-shaped member of a fall prevention structure. FIG. 4 is a view showing a state in which a hook portion of the cross member shown in FIG. 3 is attached to a support. FIG. 4 is a diagram illustrating a state in which a fixing portion of the cross-shaped member illustrated in FIG. 3 is attached to a column. FIG. 6 is a view of the mounting state of FIG. 5 as viewed from above. It is a figure which shows the clearance gap 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 the figure which displaced the lock member upward, (b) is the figure which displaced the lock member downward. It is a figure which shows the attachment state with respect to a cross-shaped member of a clearance gap closing member. It is the figure which looked at the attachment state of FIG. 9 from the upper part. An example of a conventional wedge-tied scaffold is shown, where (a) is a side view and (b) is a front view. It is a figure which shows the state to which another handrail is attached in the wedge binding type scaffold shown in FIG.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

  FIGS. 1A and 1B show an example of a wedge-tied scaffold to which a temporary scaffold fall prevention structure according to the present invention is applied, wherein FIG. 1A is a side view and FIG. 1B is a front view. The wedge tie-type scaffold is provided along a general house H as a building at a building construction site.

  In this wedge-tied scaffold, as shown in FIG. 1A, the columns 1 are juxtaposed in a direction toward the general house H (the left-right direction in the figure). In these columns 1, when the side near the general house H is the column 1A and the side far from the general house H is 1B, if the column 1A on the near side is to be extended upward, the column 1A becomes the eaves E of the general house H. Is provided lower than the eaves E in order to abut the eaves. Further, since the column 1B on the far side is arranged at a position away from the eaves E, the column 1B is provided higher than the column 1A. Between the support | pillar 1A and the support | pillar 1B, the horizontal member 2 is provided so that both may be bridge | hanged at the position of the height H1 shown to Fig.1 (a). Note that a plurality of horizontal members 2 are arranged side by side in the depth direction of FIG.

  Here, the support column 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 spread in a horizontal direction, and the flange 3 is formed with four hook holes 4 in a cross shape. The lateral member 2 is provided with a mouth-like connecting portion 5 at both ends thereof, and a wedge 6 is communicated with a hooking hole 4 formed in the flange 3 to thereby provide a support 1. The horizontal member 2 is fastened to the flange 3 of the second member.

  Returning to FIG. 1B, in the direction along the general house H (the left-right direction in the figure), a plurality of columns 1B are juxtaposed. A scaffold plate 7 for a site worker to work or walk is attached to the horizontal member 2 between the columns 1B and shown in FIG. Two handrails 8 are provided between the adjacent columns 1B and at the height positions H2 and H3 above the scaffold plate 7 to prevent the on-site worker on the scaffold plate 7 from falling. .

  The temporary scaffold fall prevention structure according to the present invention includes a cross-shaped member 10 for preventing a site worker who works on a sloped roof R from falling, and a gap closing member 11 attached to a lower portion of the cross-shaped member 10. Composed of

  As shown in FIGS. 1B and 3, for example, the cross-shaped member 10 is attached between adjacent columns 1 B and at positions of heights H <b> 5 to H <b> 7 which are, for example, slope portions of the roof R (see FIGS. 3, the gap closing member 11 is omitted for convenience.) The cross-shaped member 10 includes a horizontal member 12 extending in a substantially horizontal direction, and two diagonal members 13 connected to one end and the other end of the horizontal member 12, respectively.

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

  The diagonal member 13 includes a hook portion 15 having a curved tip, a long elongated 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, and a part of the hook portion 15 is in contact with the column 1 (see FIG. 4), and the hook hole 4 of the flange 3 (see FIG. 4). 2).

  The long part 16 is for blocking the area S below the horizontal member 12 as much as possible for the purpose of preventing the fall of the site worker, and has a length longer than that of the horizontal member 12. The long portion 16 has a cylindrical pipe portion 16a and two thin portions 16b formed at both ends thereof with a small thickness. The hook portion 15 is joined to the thin portion 16 b on one side of the long portion 16 by, for example, welding, and the fixing portion 17 is joined to the thin portion 16 b on the other side of the long portion 16.

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

  An insertion hole 21 through which the wedge 20 for the fixing portion is inserted is formed in a flat portion of the U-shaped member 19. In the fixing portion 17, the U-shaped member 19 is held over the flange 3, and the wedge 20 for the fixing portion is driven into the fixing hole 17 so as to penetrate the hook hole 4 and the insertion hole 21 of the flange 3. The fixing part 17 is connected.

  The gap closing member 11 is provided to close as much as possible the lower gap P generated by the crossed diagonal members 13. 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. 1B, the gap closing member 11 is, for example, approximately the same height as the position of the height H5 of the column 1 so as to bridge over each lower part of the two diagonal members 13 of the cross-shaped member 10. Mounted in the upright position.

  FIG. 8 is a view of the mounting member 26 as viewed from the center side of the pipe member 25. The mounting member 26 is formed in a substantially polygonal flat plate shape. A recess 27 having an open bottom is formed (see FIG. 8A).

  The attachment member 26 is connected to the flat portion 26a on one side with the recess 27 as the center (the left side in FIG. 8A), the pipe member 25 is connected in the orthogonal direction, and the flat portion on the other side with the recess 27 as the center. A lock member 28 is provided on 26b (right side in FIG. 8A) to prevent the gap closing member 11 from dropping off the diagonal member 13.

  The lock member 28 is formed with two substantially U-shaped engagement holes 29, and the two protrusions 30 formed on the attachment member 26 are loosely fitted into the engagement holes 29. The lock member 28 is rotatable with respect to the mounting member 26. Note that the lock members 28 are provided on the surface sides of the mounting members 26 facing each other.

  Next, a procedure for attaching the cross member 10 and the gap closing member 11 between the columns 1B will be briefly described.

  First, the site worker holds the lower part of one of the diagonal members 13 and lifts the diagonal member 13 upward as it is, and for example, horizontally inserts it into the engaging hole 4 of the flange 3 of the left column 1B shown in FIG. The hook 15 provided at one end of the member 12 is fitted. Next, the site worker holds the lower part of the other diagonal member 13, and hooks the hook member provided at the other end of the horizontal member 12 in the hook hole 4 of the flange 3 of the right column 1 </ b> B adjacent to the left column 1 </ b> B. 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 between other flanges 3 provided below the flange 3 of the left column 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 driven into the U-shaped member 19 by hammering or the like. Fix it. As a result, the other flange 3 and the fixing portion 17 are tightly connected.

  Thereafter, similarly, the wedge 20 for the fixing portion of the fixing portion 17 of the diagonal member 10 is fixed to the U-shaped member 19 with respect to the other flanges 3 provided below the flange 3 of the right column 1, The other flange 3 and the fixing portion 17 are tightly connected. In this way, the cross member 10 is attached between the columns 1B.

  Next, the gap closing member 11 is attached to both the oblique members 13 of the cross-shaped member 10. First, as shown in FIG. 8A, the lock member 28 of the one attachment member 26 is displaced upward to open the recess 27. 9 and 10, the mounting member 26 is hooked on the thin portion 16b of the one diagonal member 13 with the concave portion 27 opened.

  Thereafter, as shown in FIG. 8B, the lock member 28 is displaced downward to lock the gap closing member 11 so as not to fall off the diagonal member 13. In this manner, one attachment member 26 of the gap closing member 11 is attached to one diagonal member 13. Next, the other attachment member 26 on the opposite side is attached 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 bridge the two slant members 13. In this case, the thin portion 16b of the long portion 16 of the diagonal member 13 is formed to have a small thickness, and the mounting member 26 of the gap closing member 11 is connected to the flat portion 26a on one side with the recess 27 at the center. Since the member 25 is connected, the long portion 16 and the pipe member 25 do not come into contact with each other as shown in FIG.

  As described above, the cross member 10 can be easily attached to the column 1B, and the gap closing member 11 can be securely attached to the cross member 10. In this case, even when the worker is on the scaffolding plate 7 shown in FIG. 1B, the worker can easily attach it to the positions of the heights H5 to H7.

  In addition, the fall prevention structure according to the present embodiment can appropriately close the gap S at the positions of the heights H5 to H7, and can reliably prevent the on-site worker working on the roof R from falling. The cross member 10 has a substantially triangular gap P under the pair of diagonal members 13 obliquely intersecting with each other, but the gap closing member 11 is attached to the lower portion of the cross member 10. Accordingly, the gap P in that portion can also be satisfactorily closed.

  Note that the scope of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention. For example, the shape, size, quantity, and the like of the cross-shaped member 10 and the gap closing member 11 in the above embodiment are not limited to the above embodiment, and the design can be changed as appropriate. Further, the fall prevention structure according to the present invention is applied to, for example, a wedge-tied scaffold along a general house, but may be applied to a wedge-tied scaffold along other buildings without being limited to a general house. Further, the fall prevention structure in the present invention may be used, for example, as a handrail of an assembling type movable scaffold, or may be used between a form support and a main scaffold provided on an outer periphery thereof.

  Further, for example, in the above embodiment, the support column 1 is provided with the flange 3, but instead of the flange 3, for example, a U-shaped pocket body in a top view is provided, and each temporary member is connected to this pocket body. Is also good.

DESCRIPTION OF SYMBOLS 1 Prop 3 Flange 10 Cross member 11 Gap closing member 12 Horizontal member 13 Diagonal material 15 Hook portion 16 Long portion 16a Pipe portion 16b Thin portion 17 Fixed portion 25 Pipe material 26 Mounting member 27 Depression 28 Lock member R Roof

Claims (5)

A plurality of pillars are provided on a temporary scaffold is erected, a fall prevention structure for preventing a worker from falling from the temporary scaffold,
An intersecting member having a pair of diagonal members arranged in an oblique direction so as to intersect between the adjacent columns,
A gap closing member attached to the lower part of the two diagonal members so as to span them,
A structure for preventing a temporary scaffold from falling, characterized by comprising: The gap closing member,
Pipe material having a predetermined length;
Consisting of mounting members formed at both ends of the pipe material,
The mounting member,
The fall prevention structure for a temporary scaffold according to claim 1, wherein the temporary scaffold is attached to the cross member in the middle of the diagonal member. At the end of the diagonal material, a thin portion having a small thickness is formed,
The mounting member has a recess that is open downward,
The fall prevention structure for a temporary scaffold according to claim 2, wherein the attachment member is attached to the diagonal member by hooking the concave portion to the thin portion. In the mounting member,
The fall prevention structure for a temporary scaffold according to claim 2 or 3, further comprising a lock member rotatably supported and holding a state of being attached to the diagonal member. A plurality of pillars are provided on a temporary scaffold that is erected, and are used as a part of a fall prevention structure for preventing a worker from falling from the temporary scaffold,
The fall prevention structure includes:
It has a cross-shaped member having a pair of diagonal members arranged in an oblique direction so as to intersect between the adjacent columns,
A gap closing member, which is attached to a lower portion of the two oblique members so as to span them.

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