JP7349677B2 - Support structure of temporary handrail - Google Patents

Description

The present invention mainly relates to temporary handrails that are installed at construction sites for multi-story buildings, around the outer periphery of the building, around openings such as stairway construction areas and atrium construction areas, and around other fall-prone areas.

Conventionally, in multi-story buildings of two or more stories, temporary handrails have been provided at the periphery of the building to prevent workers from falling. In order to improve the workability and safety of such temporary handrails, temporary handrails are equipped with handrail supports that are removably installed on H-shaped steel beams and handrail pipes that are stretched between the handrail supports. A mounting body for attaching to the flange of the beam is integrally formed at the lower end of the handrail column, and the mounting body includes a plate placed on the beam and a plate that protrudes downward from the plate. A configuration is disclosed that includes an insertion shaft that is removably inserted across beam holes formed in upper and lower flanges of a beam (see Patent Document 1).

Japanese Patent Application Publication No. 2010-185185

By the way, in the configuration in which the handrail support is erected by inserting the shaft formed at the lower end of the handrail support into the beam hole as described above, the load applied to the handrail support due to a worker hitting the temporary handrail, etc. , which acts as a large load on the shaft using the beam hole as a fulcrum. For this reason, the shaft formed at the lower end of the handrail post is particularly prone to deformation, but since the main body of the handrail post and the shaft are formed as one piece, if the shaft becomes deformed, the entire handrail post must be replaced. There was a need. In addition, it was necessary to install a baseboard at the bottom end of the handrail support, but the work was cumbersome as it was necessary to attach metal fittings to install the baseboard. Furthermore, the handrail pipe is placed on the beam, which may interfere with other members installed on the beam, making it difficult to attach the handrail pipe.

Therefore, the present invention provides a temporary structure that eliminates the need to replace the entire handrail support when the shaft is deformed, makes it easy to install baseboards, and allows the handrail pipe to be placed without interfering with other members. The purpose is to provide a support structure for handrails.

The support structure of the temporary handrail of the present invention includes a shaft in which a male threaded portion is formed in the upper part and an insertion part inserted into a beam through hole formed in the beam is formed in the lower part, and the male threaded part of the shaft is formed in the lower part. a joint in which an insertion hole is formed; a pair of clamping nuts that are screwed onto the male thread of the shaft and clamp a part of the joint; and a strut whose lower end is fixed to the joint. further comprising a lower nut screwed into the male threaded portion of the shaft, and the joint portion includes a horizontal upper plate and a lower plate parallel to the upper plate and abutting on the upper surface of the beam. , a vertical plate connecting the upper plate and the lower plate, wherein the insertion hole is formed at a position where the upper plate and the lower plate overlap when viewed from above, and the insertion hole is screwed into the male screw portion. A pair of clamping nuts clamp the upper plate, and the lower nut presses against the upper surface of the lower plate .

In the support structure of the temporary handrail of the present invention, the vertical plate is formed on the outdoor side from the center in the width direction of the beam, the lower plate extends from the lower end of the vertical plate toward the outdoor side, and The upper plate is formed to extend toward the indoor side and the outdoor side of the upper end of the vertical plate, and the distance between the beam and the upper plate is greater than or equal to the thickness of the floor slab placed on the beam. , the support main body is fixed to a position on the indoor side of the upper plate relative to the vertical plate.

In the support structure of the temporary handrail of the present invention, the lower end of the support main body is fixed to the upper surface of the upper plate, and one end of the upper plate is bent upward to form a rising part, and the support main body and the rising part A baseboard is inserted between the baseboard and the baseboard, and is characterized in that an elastic body is provided that is fixed to the upright portion and presses against the support main body.

In the support structure of a temporary handrail according to the present invention, the support main body has a clamp for holding a horizontal member, the support main body is erected at a position overlapping the beam when viewed from above, and the clamp includes: It is characterized in that it protrudes from the support main body so as not to overlap the beam when viewed from above.
Furthermore, the support structure of the temporary handrail of the present invention includes a shaft in which a male threaded portion is formed in the upper part and an insertion part that is inserted into a beam through hole formed in the beam in the lower part, and the male threaded part of the shaft. a joint in which an insertion hole into which the part is inserted is formed, a pair of clamping nuts that are screwed onto the male threaded part of the shaft and clamp a part of the joint, and a lower end is fixed to the joint. a column main body, the column main body has a clamp for holding a horizontal member, the column main body is erected at a position overlapping the beam when viewed from above, and the clamp is It is characterized in that it protrudes from the support main body so as not to overlap the beam when viewed.

According to the support structure of the temporary handrail of the present invention, the shaft is fixed to the joint by the gripping nut gripping the joint where the lower end of the support main body is fixed. The shaft can be removed from the column, and the shaft can be attached to and detached from the support body. Therefore, even if a worker or a work jig hits the handrail pipe or the support body of the temporary handrail, applying load to the support body and deforming the shaft inserted into the beam through-hole of the beam, the shaft can be removed from the joint. Only the shaft can be removed and replaced; there is no need to replace the entire column itself.

According to the support structure of the temporary handrail of the present invention, the joint is formed by connecting a horizontal upper plate and a lower plate with a vertical plate, and the joint is formed at a position where the upper plate and the lower plate overlap when viewed from above. The male threaded part of the shaft is inserted into the insertion hole, and the holding nut screwed into the male threaded part holds the upper plate, and the lower nut presses against the upper surface of the lower plate, so the shaft can be stably attached to the joint. They can be joined and the support main body can be firmly erected.

According to the support structure of the temporary handrail of the present invention, the vertical plate is formed on the outdoor side from the center in the width direction of the beam, the lower plate extends from the lower end of the vertical plate toward the outdoor side, and the upper plate is formed on the side of the vertical plate. It is formed to extend to the indoor side and outdoor side of the upper end, and the distance between the beam and the upper plate is greater than or equal to the thickness of the floor slab placed on the beam, and the distance between the upper plate and the indoor side is longer than the vertical plate of the upper plate. Since the main column is fixed at the position, a space is created on the indoor side of the widthwise center of the beam to place the edge of the floor slab, and the lower end of the column interferes with the floor slab. Supports can be erected on top of the floor slab without any problems.

According to the strut structure of the temporary handrail of the present invention, the lower end of the strut body is fixed to the upper surface of the upper plate, one end of the upper plate is bent upward to form a rising part, and there is a gap between the strut body and the rising part. The baseboard is inserted into the baseboard, and an elastic body is provided that is fixed to the upright part and presses against the support body, so the baseboard can be easily fixed without rattling. In addition, since a gap is formed between the rising portion bent from the top plate and the support main body, into which the baseboard is inserted, there is no need to separately attach a member for fixing the baseboard, and workability can be improved.

According to the support structure of the temporary handrail of the present invention, the support main body is provided with a clamp that holds the horizontal member, the support main body is erected at a position overlapping the beam when viewed from above, and the clamp is Since it is formed so as to protrude from the main body of the support so that it does not overlap the beam when viewed from above, the horizontal member is placed so that it does not overlap with the beam, and it does not overlap with other members such as columns installed on the beam. The horizontal members can be arranged with a simple configuration without interfering with the horizontal members, and the number of parts and construction labor can be reduced.

FIG. 3 is a side view showing the overall configuration of the support structure of the temporary handrail. FIG. 2 is a perspective view showing the overall configuration of the support structure of the temporary handrail. An enlarged view illustrating the structure of the clamp, joint, and shaft of the support structure of the temporary handrail. FIG. 3 is a side view illustrating a state in which the shaft is removed from the joint of the support structure of the temporary handrail. An enlarged view illustrating a state in which the shaft is removed from the joint of the support structure of the temporary handrail. The perspective view explaining the state where the shaft of the support structure of a temporary handrail is inserted into the beam through-hole provided in the beam. The side view explaining the state where the support structure of the temporary handrail is fixed to the beam. The perspective view explaining the state where the support structure of the temporary handrail is fixed to the beam. FIG. 3 is a diagram illustrating a state in which baseboards are attached to the support structure of a temporary handrail. FIG. 3 is a perspective view illustrating a state in which a temporary handrail is completed by fixing a horizontal member to a clamp of a support main body.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the support structure 1 of the temporary handrail of this invention is described, referring to each figure. The temporary handrail support structure 1 of this embodiment can be used, for example, at the construction site of a multi-story building such as a house, around the outer periphery of the building, around openings such as staircase construction parts and atrium construction parts, and other fall-prone areas. This is a support structure used for a temporary handrail 3 installed on a beam 2 that is being constructed. As shown in FIG. 6, the beam 2 on which the temporary handrail 3 is installed is made of H-beam steel with flanges 4a and 4b horizontally arranged above and below, and whose central portions along the longitudinal direction are connected by a web 5. A plurality of beam through holes 2a are formed in the upper and lower flanges 4a, 4b of the beam 2 on both sides with the web 5 in between, spaced apart along the longitudinal direction. The beam through-hole 2a of the upper flange 4a and the beam through-hole 2a of the lower flange 4b are respectively formed at overlapping positions when viewed from above.

As shown in FIGS. 1 and 2, the temporary handrail support structure 1 includes a shaft 6 inserted into the beam through hole 2a of the flanges 4a and 4b, a joint 7 fixed to the upper part of the shaft 6, and a joint. The pillar main body 8 has a lower end fixed to the joint part 7 and is erected upward from the joint part 7. Further, the support structure 1 of the temporary handrail is provided with a baseboard insertion portion 10 into which a baseboard 9 is inserted and fixed along the lower end of the support main body 8.

As shown in FIGS. 3 to 5, the shaft 6 has a cylindrical shape, with a male threaded portion 6a formed at the top and an insertion portion 6b inserted into the beam through hole 2a formed in the beam 2 at the bottom. It is a round metal bar. The insertion portion 6b of the shaft 6 is formed to be longer than the distance between the upper and lower flanges 4a, 4b of the beam 2, and when the insertion portion 6b is inserted into the beam through hole 2a formed in the upper and lower flanges 4a, 4b. In addition, the lower end of the insertion portion 6b projects further downward than the lower flange 4b.

The joint 7 includes a horizontal upper plate 70, a lower plate 71 that is parallel to the upper plate 70 and abuts the upper flange 4a of the beam 2, and a vertical plate 72 that connects the upper plate 70 and the lower plate 71. have. When the vertical plate 72 is fixed on the beam 2, it is a flat plate that is placed on the outdoor side from the center of the beam 2 in the width direction, and the lower plate 71 extends from the lower end of the vertical plate 72 toward the outdoor side. It is extending. Further, an upper plate 70 is formed at the upper end of the vertical plate 72 so as to extend toward the indoor side and the outdoor side. The distance between the upper flange 4a of the beam 2 and the upper plate 70 is longer than the thickness of the floor slab 11 placed on the beam 2, and the floor slab 11 is placed on the indoor side of the upper flange 4a of the beam 2. When installed, the upper plate 70 does not interfere with the floor slab 11. Insertion holes 73 are formed at positions where the upper plate 70 and the lower plate 71 overlap when viewed from above, and the male threaded portion 6a of the shaft 6 can be inserted therein.

A pair of holding nuts 12a, 12b and a lower nut 12c are screwed into the male threaded portion 6a. The pair of clamping nuts 12a and 12b are screwed onto the male threaded portion 6a of the joint portion 7 and clamped onto the upper plate 70 from above and below, thereby joining the upper plate 70 and the shaft 6. Further, the lower nut 12c is screwed onto the male threaded portion 6a and is pressed against the upper surface of the lower plate 71. In this way, the male threaded portion 6a is inserted into the insertion hole 73 of the upper plate 70 and the lower plate 71 and fixed by the pair of clamping nuts 12a, 12b and the lower nut 12c, so that the shaft 6 and the joint portion 7 are fixed. can be firmly joined, and the support main body 8 can be safely fixed without wobbling. Since the clamping nuts 12a, 12b and the lower nut 12c fix the screws, by loosening the clamping nuts 12a, 12b and the lower nut 12c, the connection between the shaft 6 and the joint 7 can be released, and the shaft 6 can be disconnected from the joint 7. The shaft 6 can be removed. Therefore, when a worker or work jig hits the horizontal member 13 such as the handrail or middle crosspiece of the temporary handrail 3 or the main body 8 of the support, a load is applied to the main body 8 of the support, and the support body 8 is inserted into the beam through hole 2a of the beam 2. Even if the shaft 6 is deformed, the shaft 6 can be removed from the joint 7 and only the shaft 6 can be replaced, and there is no need to replace the entire strut body 8.

In this embodiment, the support main body 8 is a long vertical member made of a round metal pipe. Note that the shape of the support main body 8 is not limited to a round pipe, and may be, for example, a square pipe. Further, in this embodiment, the support main body 8 is formed of one round pipe, but the support main body 8 can be formed as two long cylinders, one of which can be inserted into the other. It may also be configured to expand and contract. The column main body 8 is erected at a position closer to the indoor side than the vertical plate 72 of the upper plate 70 of the joint portion 7 with its lower end fixed by welding. A flat reinforcing plate 14 is welded to the upper surface of the upper plate 70 on the outdoor side of the column main body 8, and reinforces the joint between the column main body 8 and the joint portion 7.

As shown in FIGS. 1 and 2, the support main body 8 has clamps 15 at an intermediate position in the height direction and at an upper end in the height direction. As shown in FIG. 3, the clamp 15 has a base material 15a that is fixed to the round pipe of the column main body 8 and has a semicircular receiving part 15d, and a C-shaped clamp whose lower end is fixed to the base material 15a via a hinge so that it can be opened and closed. It has a fixing piece 15b and a removable bolt 15c that connects the upper end of the fixing piece 15b and the base material 15a, and when the bolt 15c is tightened to fix the upper end of the fixing piece 15b to the base material 15a. A circular hole 15e is formed by the receiving portion 15d and the fixed piece 15b. As shown in FIG. 6, the support main body 8 is erected on the upper plate 70 of the joint portion 7 at a position overlapping the beam 2 in the vertical direction, and the clamp 15 projects toward the indoor side of the beam 2. As shown in FIG. 10, a cylindrical horizontal member 13 is inserted and fixed in the circular hole 15e, and the two upper and lower horizontal members 13 form a handrail and a middle crosspiece. Since the clamp 15 does not overlap the beam 2 in the vertical direction and protrudes toward the indoor side of the beam 2, members such as exterior wall fasteners that fasten columns or exterior wall panels (not shown) installed on the beam 2 to the beam 2 can be used. Since the horizontal member 13 does not interfere with the horizontal member 13, the horizontal member 13 can be formed into a cylindrical shape with a simple configuration, and the number of parts and construction labor can be reduced.

The indoor end of the upper plate 70 of the joint portion 7 is bent upward to form a rising portion 16, as shown in FIG. An elastic body 17 is fixed to the rising portion 16, and the elastic body 17 is in pressure contact with the column main body 8. The elastic body 17 is a torsion spring, and is formed to extend diagonally downward from the upright portion 16 toward the support main body 8. The gap between the support main body 8 and the rising portion 16 serves as a baseboard insertion portion 10 into which a flat baseboard 9 is inserted. As shown in FIGS. 9 and 10, the baseboard 9 inserted into the baseboard insertion part 10 is pressed against the support main body 8 side by the elastic body 17, and is easily fixed without wobbling just by inserting it. For example, it is possible to prevent building materials and construction jigs (not shown) from falling. Note that the baseboard insertion part 10 is on the indoor side of the support main body 8 and is placed on the indoor side of the beam 2, so that the baseboard 9 inserted into the baseboard insertion part 10 is installed on the beam 2. There is no interference with members such as columns (not shown) or external wall fasteners that fasten the external wall panel to the beam 2, and even if the baseboard 9 is formed into a simple flat plate shape, it can be easily fastened, reducing the number of parts. It is possible to reduce costs and save labor in construction. Further, since the baseboard insertion part 10 is formed by the rising part 16 of the upper plate 70 and the support main body 8, there is no need to separately fix a member for fixing the baseboard 9 to the support or beam 2. Excellent workability.

When constructing the support structure 1 of the temporary handrail as described above, as shown in FIGS. 6a and fix it with clamping nuts 12a, 12b and lower nut 12c. Then, as shown in FIG. 6, the insertion portion 6b of the shaft 6 is inserted into the beam through hole 2a formed in the upper and lower flanges 4a, 4b of the H-beam 2, and as shown in FIGS. Then, the lower plate 71 of the joint portion 7 is placed on the upper surface of the upper flange 4a of the beam 2. The lower end of the insertion part 6b of the shaft 6 protrudes below the lower flange 4b and is inserted into the upper and lower beam through-holes 2a, so that the support column erected on the joint part 7 joined to the shaft 6 The main body 8 can be erected without wobbling.

Thereafter, as shown in FIG. 9, by inserting the baseboard 9 formed into a flat plate shape into the baseboard insertion part 10 formed between the column main body 8 and the rising part 16, the baseboard is inserted into the baseboard by the elastic body 17. 9 is pressed against the support main body 8 side and fixed. The baseboard insertion part 10 is disposed closer to the indoor side than the beam 2, so that the baseboard 9 does not interfere with other members fixed on the beam 2. Then, the fixed piece 15b of the clamp 15 is opened and the horizontal member 13 is inserted into the receiving portion 15d, the fixed piece 15b is closed by tightening the bolt 15c, and the horizontal member 13 is inserted into the circular hole of the clamp 15. Although not shown, a plurality of temporary handrail support structures 1 are provided on the beam 2 at predetermined intervals, and the temporary handrail 3 is completed by installing horizontal members 13 on the clamps 15 of the plurality of support main bodies 8. let As shown in FIGS. 7 and 9, since the clamp 15 is placed closer to the indoor side than the beam 2, the horizontal member 13 does not interfere with other members fixed on the beam 2. 13 can be arranged linearly, reducing the number of parts and saving labor in construction.

As shown in FIGS. 9 and 10, the vertical distance between the upper flange 4a of the beam 2 and the upper plate 70 of the joint 7 is longer than the thickness of the floor slab 11 placed on the beam 2. The floor slab 11 is placed on the upper flange 4a of the beam 2. The upper plate 70 of the joint portion 7 extends above the floor slab 11, and the support main body 8 is erected on the floor slab 11 without interfering with the floor slab 11.

The temporary handrail 3 prevents the worker from falling or the building materials and construction tools (not shown) from falling at a construction site if they hit the horizontal members 13 such as handrails or middle beams, or the support body 8. This is to prevent the shaft 6 from being bent or damaged due to a large load being applied to the shaft 6, which is the connection point with the beam 2.

In such a case, as shown in FIGS. 4 and 5, loosen and remove the upper clamping nut 12a from the male threaded portion 6a of the shaft 6, and loosen and remove the lower clamping nut 12b and lower nut 12c. At the same time, the shaft 6 is pulled out from the insertion hole 73 formed in the upper plate 70 and lower plate 71 of the joint portion 7. Then, insert the male threaded part 6a of the new shaft 6 into the insertion hole 73 formed in the lower plate 71 of the joint part 7, and insert the lower nut 12c and the male threaded part 6a between the upper plate 70 and the lower plate 71. Screw together the lower clamping nut 12b. Then, the male screw part 6a is inserted into the insertion hole 73 formed in the upper plate 70, the upper clamping nut 12a is screwed into the male screw part 6a, and the clamping nuts 12a, 12b are inserted into the upper plate 73 of the joint part 7. At the same time, the lower nut 12c is tightened so as to be in pressure contact with the lower plate 71 of the joint portion 7, and the replacement work of the shaft 6 is completed. In this way, even if the shaft 6 is deformed, the shaft 6 can be removed from the joint 7 and only the shaft 6 can be replaced, making it easy to replace.

It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the idea of the present invention.

The temporary handrail support structure 1 according to the present invention is suitable as a temporary handrail support structure 1 for preventing falls at a construction site of a multi-story building.

1 Support structure of temporary handrail 2 Beam 2a Beam through hole 3 Temporary handrail 6 Shaft 6a Male screw part 6b Insertion part 7 Joint part 8 Support body 9 Skirting board 11 Floor slab 12a, 12b Holding nut 12c Lower nut 13 Horizontal member 15 Clamp 16 Standing portion 17 Elastic body 70 Upper plate 71 Lower plate 72 Vertical plate

Claims (5)

a shaft having a male threaded portion formed at an upper portion and an insertion portion inserted into a beam through hole formed in the beam at the lower portion;
a joint portion in which an insertion hole is formed into which the male threaded portion of the shaft is inserted;
a pair of clamping nuts that are screwed onto the male threaded portion of the shaft and clamp a portion of the joint;
a strut body whose lower end is fixed to the joint;
Equipped with
further comprising a lower nut screwed into the male threaded portion of the shaft,
The joint portion includes a horizontal upper plate, a lower plate parallel to the upper plate and in contact with the upper surface of the beam, and a vertical plate connecting the upper plate and the lower plate,
The insertion hole is formed at a position where the upper plate and the lower plate overlap when viewed from above,
A support structure for a temporary handrail, characterized in that the pair of clamping nuts screwed into the male screw portion clamp the upper plate, and the lower nut presses against the upper surface of the lower plate. The vertical plate is formed on the outdoor side of the widthwise center of the beam,
The lower plate is formed to extend from the lower end of the vertical plate to the outdoor side, and the upper plate is formed to extend from the upper end of the vertical plate to the indoor side and the outdoor side,
The distance between the beam and the upper plate is greater than or equal to the thickness of the floor slab placed on the beam,
2. The support structure for a temporary handrail according to claim 1, wherein the support main body is fixed to a position closer to the interior than the vertical plate of the upper plate. The lower end of the support main body is fixed to the upper surface of the upper plate, and
one end of the upper plate is bent upward to form a rising portion;
A baseboard is inserted between the support main body and the rising part,
3. The support structure for a temporary handrail according to claim 1, further comprising an elastic body fixed to the upright portion and pressed against the support main body. The support main body has a clamp that holds a horizontal member,
2. The support main body is erected at a position overlapping the beam when viewed from above, and the clamp protrudes from the support main body so as not to overlap the beam when viewed from above. A support structure for a temporary handrail according to claim 3 . a shaft having a male threaded portion formed at an upper portion and an insertion portion inserted into a beam through hole formed in the beam at the lower portion;
a joint portion in which an insertion hole is formed into which the male threaded portion of the shaft is inserted;
a pair of clamping nuts that are screwed onto the male threaded portion of the shaft and clamp a portion of the joint;
a strut body whose lower end is fixed to the joint;
Equipped with
The support main body has a clamp that holds a horizontal member,
The support main body is erected at a position overlapping the beam when viewed from above, and the clamp protrudes from the support main body so as not to overlap the beam when viewed from above. Strut structure.

Images