JP2018197450A - Brace lower crosspiece coupling metal fitting - Google Patents

Abstract

To provide a brace lower crosspiece coupling metal fitting in which an existing brace member and an existing lower crosspiece member can be used without change and coupling between the brace member and the lower crosspiece member can be conducted in a simple configuration with excellent workability.SOLUTION: There is provided a lower crosspiece coupling metal fitting 10 for coupling a brace member 12 and a lower crosspiece member 13 which are attached between adjacent vertical pipes 15, 16 of a temporary scaffold 11, comprising a short coupling member 18, a brace attachment unit 19 detachable to the brace member 12, and a lower crosspiece attachment unit 20 detachable to the lower crosspiece member 13, the brace attachment unit 19 and the lower crosspiece attachment unit 20 being provided to either longitudinal side of the coupling member 18, in which the brace attachment unit 19 and the lower crosspiece attachment unit 20 are provided to be movable longitudinally to the coupling member 18.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a bracing joint connecting bracket used for a temporary scaffold (assembly scaffold) constructed on the site of construction or civil engineering work.

At construction and civil engineering work sites, horizontal pipes are attached to a plurality of vertical pipes that are erected at predetermined intervals, and scaffolding plates are erected between adjacent horizontal pipes at intervals. A temporary scaffold is built that forms the work floor for the worker. In addition, between the adjacent vertical pipes, two braces (strut members) are attached in an X shape to enhance the connection.
However, when two braces are attached in an X shape between vertical pipes, a large triangular space is formed on the lower side. For example, when an operator slides his / her foot on the work floor, Could fall out of space and cause a serious accident.

For this reason, the occupational safety and health regulations (scaffolding, etc.) were revised, and in addition to braces, it was obliged to install lower rails, skirting boards, etc., or handrail frames.
For example, in Patent Document 1, a lower cross (protective cross) provided with slide fittings having frame-shaped openings at both ends is inserted into the brace by inserting the slide fitting into the respective lower ends of the brace. On the other hand, there is disclosed a technique in which a bracing member and a lower beam are integrated by being slidably attached. In addition, in order to prevent the bracing material from being pulled out from the frame-shaped opening of the slide fitting, both ends of the lower rail are attached with a retaining fitting.

JP-A-11-223011

However, since the lower rail described in Patent Document 1 has a configuration in which slide fittings are provided at both ends, for example, an existing lower rail without a sliding fitting cannot be used and must be newly purchased. did not become.
Further, when constructing the temporary scaffold, the brace had to be attached to the vertical pipe with the slide fitting inserted through the brace and the long undercarriage attached to the brace, and the workability was poor.
Furthermore, since the retaining bracket needs to be fixed to the lower rail using a caulking rivet, workability when constructing or dismantling the temporary scaffold is poor.

  The present invention has been made in view of such circumstances, and the existing bracing member and the lower beam member can be used as they are, and the lower bracing beam that can be connected to the bracing member and the lower beam member with a simple configuration and good workability. An object is to provide a coupling metal fitting.

The brace lower beam connecting bracket according to the present invention that meets the above object is a brace lower beam connecting bracket that connects the bracing member and the lower beam member, which are attached between adjacent vertical pipes of the temporary scaffolding,
A short connecting member;
A bracing attachment portion detachably attached to the bracing member, and a lower rail attachment portion detachably attached to the lower rail member, provided on both sides in the longitudinal direction of the connecting member;
The bracing attachment portion and the lower rail attachment portion are each provided to be movable in the longitudinal direction of the connecting member.

In the bracing lower beam connecting bracket according to the present invention, the bracing attachment portion and the lower beam attachment portion each include a fixing portion having a U-shaped cross section, and an inner peripheral curved surface of the fixing portion is the bracing member and the lower beam. It is preferable that each of the members can be brought into contact with the outer peripheral surface.
Here, it is preferable that each of the fixing portions is provided with a tightening bolt that presses and fixes the bracing member or the lower crosspiece member to an inner peripheral curved surface of the fixing portion.

The bracing lower beam connecting bracket according to the present invention includes a connecting member, a bracing attachment portion, and a lower beam attachment portion, and the bracing attachment portion and the lower beam attachment portion are movable in the longitudinal direction of the connection member. Therefore, it can be attached to the existing bracing member and the lower crosspiece member that are conventionally used.
Therefore, the existing bracing member and the lower beam member can be used as they are, and the connection between the bracing member and the lower beam member (integration of the bracing member and the lower beam member) can be performed with a simple configuration and good workability.

It is explanatory drawing at the time of use of the brace lower crosspiece coupling metal fitting which concerns on one embodiment of this invention. It is explanatory drawing which shows the attachment state to the brace and lower crosspiece handrail of the same bracing lower crosspiece coupling metal fitting. It is a front view of the lower crosspiece connecting bracket. It is a top view of the same bracing lower crosspiece metal fitting. It is a bottom view of the lower crosspiece connecting bracket. It is a left view of the lower crosspiece connecting bracket. It is a right view of the lower crosspiece connecting bracket.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1 and FIG. 2, a brace lower rail connecting bracket (hereinafter also simply referred to as a connecting bracket) 10 according to an embodiment of the present invention is an existing brace (an example of a bracing member) that constitutes a temporary scaffold 11. ) 12 and the lower rail rail (an example of the lower rail member) 13 can be used as they are without improvement, and the brace 12 and the lower rail rail 13 can be connected with a simple configuration with good workability. This will be described in detail below.

The temporary scaffold 11 includes a unit vertical pipe group 14 that is erected with respect to the ground.
The unit vertical pipe group 14 includes first and second vertical pipes 15 that form pairs arranged at predetermined intervals along a wall surface of an object (not shown) that builds the temporary scaffold 11 around. 16 sets are parallel to each other at a predetermined interval in a direction (depth direction) perpendicular to the wall surface. Here, the first vertical pipe 15 and the second vertical pipe 16 that are paired are connected by a long horizontal pipe (not shown), and a second vertical pipe that is adjacent to the adjacent first vertical pipes 15. The pipes 16 are connected by a short horizontal pipe (not shown).

The above-described unit vertical pipe group 14 is usually used by being continuously installed around the object, but it can also be used, for example.
A rectangular metal scaffolding plate 17 is stretched between short horizontal pipes adjacent to each other with a gap. For this reason, the scaffold plate 17 has a first vertical pipe 15 and a second vertical pipe 16 that are adjacent to each other, a first vertical pipe 15 that is adjacent to the first vertical pipe 15, and a first vertical pipe 15 that is adjacent to each other. It is arranged in a region surrounded by the two vertical pipes 16 and the second vertical pipe 16.

A brace 12 is attached between the first vertical pipe 15 and the second vertical pipe 16 which are adjacent to each other (a pair).
The brace 12 is made of a metal rod (for example, φ21.7) having a circular cross section, and is attached between the first and second vertical pipes 15 and 16 as a pair. Yes. Specifically, two braces 12 have one end in the axial direction of one brace 12 as the first vertical pipe 15, the other end in the axial direction as the second vertical pipe 16, and the other. One end of the brace 12 in the axial direction is attached to the second vertical pipe 16, and the other end in the axial direction is attached to the first vertical pipe 15. Shape).

Further, a lower rail 13 is also attached between the adjacent first vertical pipe 15 and second vertical pipe 16.
The lower rail 13 is composed of a cylindrical metal pipe (for example, φ21.7, φ25.4, φ27.2, etc.), and is interposed between the first and second vertical pipes 15 and 16. Installed horizontally. Specifically, one end in the axial direction of the lower railing 13 is the first vertical pipe 15, the other end in the axial direction is the second vertical pipe 16, and the height of the lower end of each brace 12. It is attached according to the position.

FIG. 1 shows a region (lower corner shown in FIG. 1) where the lower end of each brace 12 arranged in an X shape and the both ends in the axial direction of the lower rail 13 are close to each other. As described above, the bracing lower beam connecting bracket 10 is attached. In FIG. 1, only one section where two braces 12 and one lower rail 13 are attached is shown, but in reality, the configuration shown in FIG. It is continuous in the (left / right) direction.
As shown in FIGS. 2 to 7, the brace lower crosspiece connecting bracket 10 includes a connecting member 18, a bracing attachment portion 19, and a lower crosspiece attachment portion provided on both longitudinal sides of the connecting member 18. 20.

The above-described connecting member 18 is made of SPHC (hot rolled steel plate), but may be composed of other steel materials (for example, ordinary steel, carbon steel, high-tensile steel) depending on the use environment or the like.
The connecting member 18 has a plate shape with a thickness of, for example, about 3 to 6 mm (here, 4.5 mm). The length of the connecting member 18 is not particularly limited as long as it can connect the brace 12 and the lower rail 13 at the above-described region (lower corner shown in FIG. 1). Instead, for example, in the range of about 100 to 300 mm (preferably the lower limit is about 150 mm and the upper limit is about 250 mm) according to the angle (interval) formed by the brace 12 and the lower railing 13 (here, 210 mm). Can be set.

Long holes (through holes) 21 and 22 along the longitudinal direction are formed on both sides in the longitudinal direction of the connecting member 18, and one side of the connecting member 18 (on the right side in FIG. 2) through the long holes 21 and 22. ) Is provided with a bracing attachment portion 19, and a lower rail attachment portion 20 is provided on the other surface side (left side in FIG. 2). The bracing attachment 19 is detachable from the brace 12, and the lower rail attachment 20 is detachable from the lower rail 13.
Since the bracing attachment portion 19 and the lower rail attachment portion 20 have substantially the same configuration, the bracing attachment portion 19 will be mainly described below.

As shown in FIGS. 2 to 7, the bracing attachment portion 19 has a fixing portion 23 made of SPHC (hot rolled steel plate). In addition, a fixing | fixed part can also be comprised with other steel materials (for example, normal steel, carbon steel, high-tensile steel) according to use environment etc.
The fixing portion 23 has a U-shaped cross section, and a part (or all) of the inner peripheral curved surface 24 of the fixing portion 23 having the U shape may be used in the outer periphery of the brace 12. It becomes a part which contact | abuts to the surface 25 (refer FIG. 2). For this reason, the radius of curvature of the inner peripheral curved surface 24 of the fixed portion 23 is larger than the radius of the brace 12.

Similarly, a part (or all) of the inner peripheral curved surface 24 of the U-shaped fixing part 23 is also used for the fixing part 23 of the lower rail attaching part 20 in use. It becomes a part which contacts the outer peripheral surface 26 (see FIG. 2).
The radius of curvature of the inner peripheral curved surface 24 of the fixed portion 23 is larger than the radius of the lower rail with the largest outer diameter among the lower rails to be attached. It can be attached to a balustrade. In addition, you may prepare several types of fixing | fixed parts from which the curvature radius of an inner peripheral curved surface differs for every radius of the lower railing handrail used as attachment object.

The opening-side end of the U-shaped fixing part 23 is connected by a cylindrical material 27. Specifically, both ends of the cylindrical material 27 in the axial center direction are fitted into through holes 28 respectively formed at both ends of the fixing portion 23, and are fixedly attached by welding.
A connecting bolt 29 inserted into the long hole 21 from the other surface side of the connecting member 18 is inserted into the cylindrical member 27 so as to be rotatable and movable in the axial direction, and protrudes from the cylindrical member 27. A lock nut 30 is attached to the tip of the bolt 29. Reference numeral 31 denotes a washer.
As a result, the fixing portion 23 can move along the long hole 21 in the longitudinal direction (vertical direction in FIG. 2) of the connecting member 18 and can rotate with respect to the connecting member 18.

A fastening bolt 32 of the brace 12 is provided on the curved side of the fixing portion 23.
A through hole 34 is formed in the curved side wall 33 of the fixing portion 23, and a nut 35 that is screwed into the fastening bolt 32 from the outside is attached and fixed to the curved side wall 33 with the through hole 34 and the shaft center aligned. ing. The nut 35 is attached at a position where the through hole 34 is formed. The front end of the fastening bolt 32 abuts the outer peripheral surface 25 of the brace 12, and the brace 12 is connected to the inner peripheral curved surface 24 of the fixing portion 23 and the fastening bolt 32. Thus, it is set at a position where it can be sandwiched.
Accordingly, the brace 12 can be pressed and fixed to the inner peripheral curved surface 24 of the fixing portion 23 by turning the tightening bolt 32 to tighten.

Then, the usage method (the construction method and the dismantling method of the temporary scaffold 11) of the brace lower crosspiece metal fitting 10 which concerns on one embodiment of this invention is demonstrated, referring FIG. 1, FIG.
The temporary scaffold 11 is constructed around the object by the following method.
First, two pairs of first and second vertical pipes 15 and 16 are erected, and a pair of long horizontal pipes and a pair of short horizontal pipes are attached to the first and second vertical pipes 15 and 16. The scaffold plate 17 is spanned between the short horizontal pipes.

Next, two braces 12 are attached so as to cross each other between the first vertical pipe 15 and the second vertical pipe 16 adjacent to each other.
When the braces 12 are attached, the fixing portions 23 of the bracing attachment portions 19 of the brace lower beam connecting bracket 10 are respectively attached to the lower end portions of the two braces 12 in advance.
Specifically, the lower end portion of the brace 12 is inserted into the space portion 36 formed by the inner peripheral curved surface 24 of the fixing portion 23 and the cylindrical material 27. This insertion is performed such that the curved side of the fixing portion 23 is on the upper side (the upper surface of the outer peripheral surface 25 of the brace 12 is in contact with the inner peripheral curved surface 24 of the fixing portion 23).

Subsequently, the lower rail 13 is attached between the adjacent first vertical pipe 15 and second vertical pipe 16.
When attaching the lower rail rail 13, the fixing portions 23 of the lower rail mounting portion 20 of the brace lower rail coupling bracket 10 are attached to both ends in the axial direction of the lower rail rail 13, respectively.
Specifically, the end portion of the lower railing 13 is inserted into a space portion 36 formed by the inner circumferential curved surface 24 of the fixing portion 23 and the cylindrical material 27. This insertion is performed so that the curved side of the fixed portion 23 is on the upper side (the upper surface of the outer peripheral surface 26 of the lower rail 13 is in contact with the inner peripheral curved surface 24 of the fixed portion 23).

After the brace 12 and the lower rail 13 are attached between the first vertical pipe 15 and the second vertical pipe 16 adjacent to each other, the mounting position of the brace lower rail coupling fitting 10 is adjusted.
Specifically, the bracing attachment portion 19 and the lower rail attachment portion 20 are moved along the elongated holes 21 and 22 of the connecting member 18, respectively, and the bracing attachment portion 19 and the lower attachment portion 19 are moved downward with respect to the connecting member 18. Adjusting the attachment position of the bracing attachment part 19 with respect to the brace 12 and adjusting the attachment position of the lower attachment part 20 with respect to the lower handrail 13 while rotating the attachment part 20 for the crosspieces (adjusting the inclination angle). Make adjustments.

After setting the attachment positions of the bracing attachment portion 19 and the lower rail attachment portion 20 by the above-described method, the fastening bolts 32 of the bracing attachment portion 19 and the lower rail attachment portion 20 are turned and tightened. Thereby, the brace 12 can be pressed and fixed to the inner peripheral curved surface 24 of the fixing portion 23 of the bracing attachment portion 19, and the lower rail handrail 13 can be pressed and fixed to the inner peripheral curved surface 24 of the fixing portion 23 of the lower rail attachment portion 20.
Note that the brace lower crosspiece connecting bracket 10 is not limited to the above-described order as long as it can be attached to the brace 12 and the lower crosspiece handrail 13.

Further, when the temporary scaffold 11 is disassembled, the reverse procedure to the above method is performed.
Specifically, first, the fastening bolts 32 of the bracing attachment portion 19 and the lower rail attachment portion 20 are turned and loosened. Next, the lower railing 13 and the brace 12 are removed from the first vertical pipe 15 and the second vertical pipe 16. As a result, the lower rail connecting bracket 10 can be removed from the lower rail rail 13 and the brace 12.
Then, the first and second vertical pipes 15 and 16, the long and short horizontal pipes, the scaffold plate 17, and the like are disassembled.

  From the above, the existing brace 12 and the lower railing 13 can be used as they are, and the connection between the brace 12 and the lower railing 13 can be performed with a simple configuration and good workability.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, the case where the brace brace bracket of the present invention is configured by combining a part or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
In the above-described embodiment, the bracing attachment portion and the lower crosspiece attachment portion are respectively provided on different surfaces of the plate-like connecting member, and the bracing and lower crosspiece fittings are connected when attached to the brace and the lower crosspiece rail. Although the configuration that suppresses and further prevents the twisting of the member has been described, the bracing attachment portion and the lower rail attachment portion may be provided only on the same surface side of the connecting member as necessary.

Moreover, in the said embodiment, although the bracing attachment part and the lower rail attachment part demonstrated the structure each provided with the fixing | fixed part of a U-shaped cross section, the brace lower rail coupling bracket is attached to a brace and a lower rail rail There is no particular limitation as long as the configuration is removable.
For example, the shape on the curved side of the fixed portion where the outer peripheral surfaces of the brace and the lower railing are in contact with each other may be a polygonal shape without forming a curved surface. Moreover, you may affix the anti-slip | skid material comprised by rubber | gum, resin, etc. to the inner peripheral surface of the fixing | fixed part which each outer peripheral surface of a brace and a lower rail handrail contacts.
Furthermore, as for the connecting member constituting the bracing lower beam connecting bracket and the fixing portions of the bracing attachment portion and the lower beam attachment portion, the surface can be plated with zinc alloy or the like as necessary.

10: Brace lower crosspiece connecting bracket, 11: Temporary scaffolding, 12: Brace (bracing member), 13: Lower balustrade (lower crosspiece member), 14: Unit vertical pipe group, 15, 16: Vertical pipe, 17: Scaffold plate , 18: connecting member, 19: attachment part for braces, 20: attachment part for lower beam, 21, 22: long hole, 23: fixing part, 24: inner curved surface, 25, 26: outer circumferential surface, 27: cylindrical material 28: Through hole, 29: Connecting bolt, 30: Lock nut, 31: Washer, 32: Tightening bolt, 33: Side wall, 34: Through hole, 35: Nut, 36: Space

Claims (3)

A bracing lower beam connecting bracket that connects the bracing member and the lower beam member, which are attached between adjacent vertical pipes of the temporary scaffold,
A short connecting member;
A bracing attachment portion detachably attached to the bracing member, and a lower rail attachment portion detachably attached to the lower rail member, provided on both sides in the longitudinal direction of the connecting member;
The bracing lower beam connecting bracket, wherein the bracing attachment portion and the lower beam attachment portion are provided so as to be movable in the longitudinal direction of the connecting member.   2. The bracing lower beam connecting bracket according to claim 1, wherein the bracing attachment portion and the lower beam attachment portion each include a fixing portion having a U-shaped cross section, and an inner peripheral curved surface of the fixing portion is provided between the bracing member and the lower portion. A brace lower crosspiece connecting bracket characterized by being able to abut on the outer peripheral surface of the crosspiece member.   The bracing lower beam connecting bracket according to claim 2, wherein each fixing portion is provided with a fastening bolt that presses and fixes the bracing member or the lower beam member to an inner circumferential curved surface of the fixing portion. Brace lower bracket connecting bracket.

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