JP4456458B2 - Safety net mounting structure and mounting method - Google Patents

Description

  The present invention relates to a safety net mounting structure that is attached to a blow-out portion during construction, and a safety net mounting method.

  In general, a safety net is attached between the floors in order to involve work at a high place at the time of building in the blow-out part. Since such a safety net is eventually removed, conventionally, on the building side, a member for fixing the safety net, a member for fixing a safety net mounting bracket, etc. Was not provided at all.

  However, this is inconvenient in attaching a safety net, so for example, a hole is formed in a beam made of steel that forms the blowout part, and a linear shape whose upper end is bent in a U shape is formed in the hole. A safety net locking structure has been proposed in which a hook is hooked and the periphery of the safety net is locked by this hook (see Patent Document 1).

In addition, a flat base is fixed to the bottom of the beam made of steel, and the safety net is locked with the hook on the bottom of the base when building, while the base is removed from the beam together with the hook when the construction is complete. An attachment structure has been proposed (see Patent Document 2).
JP 2002-339574 A Japanese Utility Model Publication No. 5-92347

  However, a reinforcing plate is often attached to the blowout beam for reinforcement. When a hole is formed in the beam as in Patent Document 1, the hole is hidden by the reinforcing plate and cannot be used. Further, the linear hook has a reduced elasticity during repeated use, and the desired strength may not be obtained.

  Similarly, in the case of Patent Document 2, if the reinforcing plate is attached to the beam of the blowout portion, the base cannot be fixed to the beam. Furthermore, in Patent Document 2, since the base is only fixed to the beam using pins, the base may be detached from the beam.

  The subject of this invention is providing the attachment structure of the safety net which can attach a safety net reliably, and the attachment method of a safety net.

In order to solve the above-mentioned problems, the invention according to claim 1 is a safety net mounting structure that is attached to a blowout portion during construction, and a plurality of holes are formed along a beam of the blowout portion. And the claw portions are provided on both sides in the width direction, and the distance between the claw portion on one side and the claw portion on the other side is slightly smaller than the width of the rib between adjacent holes formed in the reinforcement material. A mounting member formed in a large size, and a locking member provided at one end of the mounting member, and when the safety net is attached to the blowout portion, the mounting member is leveled and the both sides in the width direction are By aligning the claw portion with the rib and rotating the mounting member so that the one end provided with the locking member is on the lower side, the ribs are sandwiched between the claw portions, While fixing the mounting member to the reinforcing member, the locking member It is characterized by locking the whole net.

  According to the above configuration, the attachment member is rotated so that the one side end portion provided with the locking member is on the lower side, and the rib is sandwiched between the claw portions at both ends in the width direction, whereby the attachment member is used as a reinforcing material. It can be firmly fixed. And since a safety net is locked with a hook provided in an attachment member, it becomes possible to attach a safety net to a blow-off part certainly.

The invention according to claim 2, Oite to claim 1, wherein the locking member is characterized by a carabiner.

Claim 3 is an invention relating to a method of attaching a safety net .

That is, when the safety net is attached to the blowout portion during construction, the invention according to claim 3 is provided with a reinforcing material having a plurality of holes formed in the beam of the blowout portion, and claw portions on both sides in the width direction. The mounting member is formed in such a manner that the gap between the claw portion on one side and the claw portion on the other side is slightly larger than the width of the rib between adjacent holes formed in the reinforcing material, The fitting members are fixed to the reinforcing member by matching the claws on both sides in the width direction with the ribs, and by tilting the attachment members and sandwiching the ribs with the two claws. The safety net is locked by a locking member provided at one end of the mounting member.

  According to the present invention, the attachment member can be firmly fixed to the reinforcing member, and thereby the safety net can be reliably attached to the blowout portion.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a mounting bracket A as an mounting member, where (a) is a plan view, (b) is a front view, and (c) is a right side view. In FIG. 1A, the left side is the front side of the mounting member A, and the right side is the rear side of the mounting member A.

  The mounting bracket A is entirely made of a metal flat plate, and includes a central flat plate portion 1, a front bent portion 2 which is provided on the front side of the central flat plate portion 1 and is bent downward, and a lower side provided on the rear side of the central flat plate portion 1. And a protruding portion 4 and 5 provided on the left and right sides of the central flat plate portion 1 (up and down in FIG. 1A). Here, the front bent portion 2 is bent 45 degrees downward with respect to the central flat plate portion 1, and the rear bent portion 3 is bent downward 90 degrees with respect to the central flat plate portion 1.

  The front bent portion 2 has a sharp tip, and a through hole 6 is formed in the vicinity of the tip portion. A carabiner (not shown) is engaged with the through hole 6. In addition, the rear side bent portion 3 is cut into a triangle shape on the left and right sides, and is formed in an inverted trapezoid shape as viewed from the rear portion (see FIG. 1C).

  Grooves 7 and 8 are formed in the center along the front-rear direction of the mounting bracket A in the left and right overhang portions 4 and 5. The distance between both end portions in the extending direction of the protruding portion 4 and the protruding portion 5 (the width direction of the central flat plate portion 1) is larger than the lateral width of the hole 9 (see FIG. 4) opened in the reinforcing material of the beam. The gap between the bottom of the groove 7 and the bottom of the groove 8 is set slightly smaller than the lateral width of the hole 9.

  The overhang portion 4 is divided into a front overhang portion 4A and a rear overhang portion 4B by a groove portion 7, and the overhang portion 5 is divided into a front overhang portion 5A and a rear bulge portion 5B by a groove portion 8. Has been. The rear side overhanging parts 4B and 5B only project laterally, but the front side overhanging parts 4A and 5A are bent 90 degrees downward at the front end side, and the front side of these front side overhanging parts 4A and 5A Side bent portions 4C and 5C are respectively formed in the. The side bent portions 4C and 5C are cut at the top, and the cut portions 4D and 5D are connected to the groove portions 7 and 8, respectively.

  FIG. 2 shows a mounting bracket B as a mounting member, where (a) is a plan view, (b) is a front view, and (c) is a left side view. FIG. 3 is a cross-sectional view taken along the line SA-SA in FIG.

  The mounting bracket B is formed entirely of metal, and includes an arm portion 10 in which a U-shaped member is bent into a “<” shape, and an engagement main body portion 11 installed above the arm portion 10. ing. The engagement main body 11 is formed by bending a substantially strip-shaped flat plate. That is, the engagement main body 11 includes a vertical part 11A whose lower part is fixed to the end face of the arm part 10, an inclined part 11B bent at an acute angle (about 65 degrees) with respect to the vertical part 11A, and an end part of the inclined part 11B. The horizontal portion 11C is fixed to the central portion of the arm portion 10 (in the vicinity of the portion folded into a “<”) shape, and the bent portion 11D is formed by bending the tip of the horizontal portion 11C at a right angle. (See FIG. 2 (b)).

  The inclined portion 11B of the engagement main body 11 is cut at one side (the upper side in FIG. 2A), and the back of the cut portion 11E is along the longitudinal direction of the inclined portion 11B. In the opposite direction. Thereby, the claw parts 12 and 13 are formed facing the inclined part 11B. Here, the distance between the tip of the claw portion 12 and the tip of the claw portion 13 is set slightly larger than the rib 14 (see FIG. 4) between the adjacent holes 9 opened in the reinforcing material of the beam. .

  Further, a through hole 15 is formed at the tip of the arm portion of the arm portion 10 where the engaging portion main body 11 is not fixed. A carabiner is engaged with the through hole 15.

  Next, a procedure for attaching a safety net using the mounting brackets A and B will be described.

  First, as shown in FIG. 4, when attaching the mounting bracket A to the reinforcing member 16, the mounting bracket A is inclined and inserted into the hole 9. Although the width of the central flat plate portion 1 of the mounting bracket A is slightly larger than the lateral width of the hole 9, the mounting bracket A can be easily inserted into the hole 9 by inclining the mounting bracket A. .

  When the mounting bracket A is inserted into the hole 9, the groove portions 7 and 8 of the mounting bracket A are aligned with the inner peripheral edge of the hole 9, and then the entire mounting bracket A is rotated in one direction (in the case of FIG. To rotate). Then, the groove portions 7 and 8 are fitted to the inner peripheral edge portion of the hole 9, whereby the mounting bracket A can be firmly fixed to the reinforcing material 16.

  Next, when attaching the mounting bracket B to the reinforcing member 16, the inclined portion 11 </ b> B of the engaging portion main body 11 is placed in a horizontal state so that the claw portions 12 and 13 are aligned with the ribs 14 of the reinforcing member 16 and the arm portion 10. The entire mounting bracket B is rotated so that the side on which the through hole 15 is provided is the lower side (in the case of FIG. 4, it is rotated clockwise). Then, the arm portion 10 becomes horizontal and the inclined portion 11B is inclined, and the ribs 14 are sandwiched between the claw portions 12 and 13. Thereby, the mounting bracket B can be firmly fixed to the reinforcing member 16.

  5 and 6 show a state in which the mounting brackets A and B are fixed to the reinforcing member 16, FIG. 5 is a front view, and FIG. 6 is a cross-sectional view taken along line BB in FIG. 4 shows the mounting bracket B fixed to one side of the reinforcing member 16 (right side in FIG. 4). However, in FIGS. 5 and 6, the other side of the reinforcing member 16 (left side in FIGS. 5 and 6) is shown. ) Shows the mounting bracket B to be fixed. The mounting bracket B that is fixed to the other side of the reinforcing member 16 is merely reversed from the left and right with respect to those that are fixed to one side of the reinforcing member 16. In addition, in FIG. 5, 20 is a unit pillar and 21 is a joint piece.

  When the mounting brackets A and B are fixed to the reinforcing member 16, as shown in FIG. 7, in the mounting bracket B, the carabiner 22 is passed through the through hole 15 at the tip of the arm portion 10, thereby The corner is locked. Further, in the mounting bracket A, by passing the carabiner 24 through the through hole 6 at the tip of the front bent portion 2, the middle portion of the rim 23A around the safety net 23 is locked, and at the same time, the rim 25A around the safety net 25 The corner is locked. That is, in FIG. 7, the safety net 23 and the safety net 25 are doubled at the center.

  As shown in FIG. 8, a scaffold 26 is assembled between the reinforcing members 16, 16 facing each other, and the safety net 23 is usually attached to the lower side of the scaffold 26. The scaffold 26 is provided with a retractable rod 27 at the ends of both sides, and when the rod 27 is advanced, the rod 27 is inserted into the hole 9 of the reinforcing material 16, whereby the scaffold 26 is fixed to the reinforcing material 16.

  In FIG. 8, the figure surrounded by a circle is an arrow view when the scaffold 26 is viewed from the C direction. As shown in the figure, an operating mechanism 28 having a lever 28A is provided at both side ends of the scaffold 26. When the lever 28A is operated as indicated by an arrow D, the rod 27 is retracted as indicated by an arrow D. Conversely, when the lever 28A is operated in the direction opposite to the arrow D, the rod 27 moves forward in the direction opposite to the arrow D.

  In order to attach the mounting bracket A to the hole 9 of the reinforcing member 16 in a state where the scaffold 26 is assembled, the rod 27 of the scaffold 26 is temporarily retracted from the hole 9 by operating the lever 28A. Then, the mounting bracket A is mounted in the hole 9. How to attach the mounting bracket A is as described above. When the mounting of the mounting bracket A is completed, the rod 28 of the scaffold 26 is inserted into the hole 9 by operating the lever 28A in the reverse direction.

  9 and 10 show a modification of the mounting bracket B. FIG. 9 is a front view when the mounting bracket B is attached to a reinforcing material, and FIG. 10 is a cross-sectional view taken along line EE in FIG. It is. In this modification, the mounting bracket B ′ is configured to sandwich the rib 30 between the inner peripheral edge portion of the hole 9 of the reinforcing member 16 and the end portion of the reinforcing member 16 with the claw portions 31 and 32.

  As mentioned above, although the Example of this invention has been explained in full detail according to drawing, the concrete structure is not restricted to this Example, The design change of the grade which does not deviate from the summary of this invention is included in this invention. For example, the mounting brackets A, B, and B ′ have been described as being made of metal, but these may be made of synthetic resin.

The mounting bracket A is shown, (a) is a plan view thereof, (b) is a front view, and (c) is a right side view. The mounting bracket B is shown, (a) is a plan view, (b) is a front view, and (c) is a left side view. It is sectional drawing along the SA-SA line of FIG.2 (b). It is the figure explaining the method of attaching attachment brackets A and B to a reinforcing material. It is a front view of the reinforcing material to which the mounting brackets A and B are attached. It is sectional drawing along the BB line of FIG. It is a figure which shows a mode that the safety net was attached using the attachment metal fittings A and B. It is a figure which shows a mode that the attachment metal fitting A is attached to the reinforcing material with which the scaffold was assembled. It is a front view of the reinforcing material to which mounting bracket B 'according to a modification is mounted. It is sectional drawing along the EE line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Central flat plate part 2 Front side bending part 3 Rear side bending part 4,5 Overhang part 7,8 Groove part 9 Hole 10 Arm part 11 Engagement body part 11B Inclination part 12,13 Claw part 14,30 Rib 16 Reinforcement material 22, 24 Carabiner 23, 25 Safety net A, B, B 'mounting bracket

Claims (3)

At the time of construction, it is a safety net mounting structure that is attached to the blowout part,
Reinforcing material provided along the beam of the blowout part and formed with a plurality of holes;
Mounting in which claw portions are provided on both sides in the width direction, and the distance between the claw portion on one side and the claw portion on the other side is slightly larger than the width of the rib between adjacent holes formed in the reinforcing material Members,
A locking member provided at one end of the mounting member;
When attaching the safety net to the blowout part,
The mounting member is leveled, the claw portions on both sides in the width direction are aligned with the ribs, and the mounting member is rotated so that one end portion provided with the locking member is on the lower side. While fixing the mounting member to the reinforcing member by sandwiching the rib with a claw part,
A safety net mounting structure, wherein the safety net is locked by the locking member. The safety net mounting structure according to claim 1, wherein the locking member is a carabiner. When attaching a safety net to the ventilated part during construction,
A reinforcing material in which a plurality of holes are formed is provided in the beam of the blowout part,
A mounting member provided with claw portions on both sides in the width direction, wherein the distance between the claw portion on one side and the claw portion on the other side is slightly larger than the width of the rib between adjacent holes formed in the reinforcing material. In the horizontal state, the claw portions on both sides in the width direction are matched with the ribs, and the mounting member is inclined and the ribs are held between the claw portions, thereby fixing the mounting member to the reinforcing material. And
Next, the safety net is locked by a locking member provided at one end of the mounting member.

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