JP5129069B2 - Safety net device for parapet work - Google Patents

Description

  The present invention relates to a safety net device for parapet work used when repairing a parapet raised along an outer wall of a building on an outer periphery such as a rooftop of a building.

  Parapets installed on the rooftops of buildings are made of concrete, so cracks may form on the upper surface after a certain number of years. If left untreated, rainwater will come out of the cracks. It may enter and cause water leakage in the building. Therefore, in order to repair this crack, it is necessary to perform a chiseling operation in which a peripheral portion of the upper surface of the parapet is scraped off to a required depth by a drill or the like. When this chipping operation is performed, the surface of the concrete is crushed and scraped off with a drill or the like, so that the fragments of the concrete are scattered and dropped from the parapet to the outdoors, resulting in a dangerous situation.

  Therefore, it is desirable to put a safety net attached to the temporary scaffolding for construction work on the outdoor side of the parapet when the parapet is torn as described above. Therefore, if such a safety net is put up, the temporary cost of the framework scaffolding is very high, so it is not worth it, so parapet work in some places is usually after temporary emergency treatment Often, they wait until the large-scale repairs of the entire building that are carried out every few years, and have them work together during the construction. However, there is a problem that leaving a crack or the like in a parapet for many years may cause a situation where water leaks inside the building and cannot be recovered.

   In view of the above problems, the present invention is a small, compact, and easily installable parapet work that can effectively prevent scattering and dropping of concrete debris and the like during a chiseling work at a part of the parapet. An object is to provide a safety net device.

  Means for solving the above-described problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 connects the upright frame 6 to one end of the horizontal frame 5, and A predetermined distance is provided between a pair of left and right brackets 1, 1 provided with a stopper 2 on the lower end side, and a clamping screw 8 and a presser 9 constituting the clamp 7 together with the stopper 2 on the other end side of the horizontal frame 5. Along with the horizontally long abutting frame 3 that is suspended between the abutments 2 and 2 of the both brackets 1 and 1 and whose rear side is in contact with the outdoor side wall Pa of the parapet P, and along the lower end on the front side of the abutting frame 3 And a net 4 to which the lower end edge is attached, and the brackets 1 and 1 are fitted over the parapet P at a predetermined interval, and the frame 3 is suspended between the metal plates 2 and 2 of the brackets 1 and 1. Is brought into contact with the outdoor side wall Pa of the parapet P and the presser foot 9 is brought into contact with the indoor side wall Pb. In this state, the brackets 1 and 1 are fixed to the parapet P by the clamps 7 respectively, and the upper end edge side of the net 4 with the lower end edge attached to the abutment frame 3 is lifted to achieve the compatible frames 6 and 6 of the brackets 1 and 1. The net 4 is stretched between them, and the left and right end portions of the net 4 are stretched between the standing frame 6 and the horizontal frame 5 of each bracket 1.

  Claim 2 is the safety net device for parapet work according to claim 1, wherein the horizontal frame 5 of each bracket 1 is slidably fitted to the fixed frame member 10 and the fixed member 10 and can be fixed at a required position. The fastening screw 8 is screwed onto an attachment frame member 12 that is suspended and connected to the slide frame member 11, and the presser foot 9 is attached to the tip of the fastening screw 8. Features.

  According to a third aspect of the present invention, in the safety net device for parapet work according to the first or second aspect, the standing frame 6 of each bracket 1 is detachably connected and fixed to the lower frame member 17 and the upper end portion of the lower frame member 17. The upper frame member 18 is provided, and the stopper 2 is attached to the distal end portion of an attachment frame member 17a projecting from the lower end portion of the lower frame member 17 in a direction facing the parapet P.

  A fourth aspect of the present invention is the safety net device for parapet work according to any one of the first to third aspects, wherein the net 4 includes a net-like net main body 27 and a fabric 28 sewn to the lower side thereof. And

  The effect of the invention by the above-described solution means will be described with reference numerals in the embodiments described later. The safety net device for parapet work according to the first aspect of the invention is small and compact, and is provided on the upper surface of the parapet P. When carrying out work such as chiseling, it can be easily and easily installed in a narrow range surrounding the outdoor side and both sides of the work center, so that parapet work such as chiseling can be carried out without temporarily setting up a large frame scaffold. It can be easily implemented at low cost. Further, in the safety net device, when the safety net device is used, a piece of concrete or the like scattered from the parapet P to the outdoors is received by the net 4 when a work such as a chisel is performed on the upper surface of the parapet P by the drill D. Therefore, it is possible to prevent falling to the outdoors and avoid dangerous situations.

  According to the safety net device of the invention according to claim 2, the horizontal frame 5 of each bracket 1 includes a fixed frame member 10, a slide frame member 11 that is slidably fitted thereto and can be fixed at a required position, The clamp screw 8 is screwed to the mounting frame member 12 that is suspended and connected to the slide frame member 11, and the presser foot 9 is attached to the tip of the tightening screw 8, so that the clamp 7 is configured. When adjusting the distance between the stopper 2 and the presser foot 9 at the tip of the tightening screw 8, after making rough adjustments with the slide frame member 11, by rotating the tightening screw 8 for fine adjustment, The clamping operation can be easily performed, and the parapet P having a different thickness in the indoor and outdoor directions can be easily handled.

  According to the safety net device of the invention of claim 3, the standing frame 6 of each bracket 1 is composed of the lower frame member 17 and the upper frame member 18 that is detachably connected and fixed to the upper end portion of the lower frame member 17. Since the stopper 2 is attached to the tip of the mounting frame 17a projecting from the lower end of the lower frame 17 in the direction facing the parapet P, the upper frame 18 is removed when not in use. The vertical frame 6 can be disassembled and is not bulky, which is convenient for transportation and storage.

  According to the invention of claim 4, the net 4 is composed of the net-like net body 27 and the fabric 28 sewn to the lower side of the net-like net body 27, so that the concrete is generated during the chiseling operation and scattered to the outside. Fine pieces, powders and the like are received by the fabric 28 formed on the lower side of the net 4 and can be prevented from falling to the outside, and the upper side of the net 4 except for the fabric 28 is meshed. Therefore, the wind pressure applied to the net 4 can be reduced, and the net 4 can be prevented from being blown away from the bracket 1 due to the wind pressure.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of the safety net device for parapet work according to the present invention as viewed from the indoor side of the parapet, and FIG. FIG. 3 is a side view of the apparatus as seen from the outside of the parapet. This safety net device is suspended between a pair of left and right brackets 1 and 1, and the metal pads 2 and 2 of the brackets 1 and 1 arranged at a predetermined interval, and the back side is in contact with the outdoor side wall Pa of the parapet P. The horizontally long abutting frame 3 and a net 4 to which a lower end edge is attached along the front side lower end of the horizontally long abutting frame 3. Each bracket 1 stands on one end of the horizontal frame 5. The frame 6 is integrally connected, and a stopper 2 is provided on the lower end side of the standing frame 6. A clamping screw 8 and a presser 9 constituting the clamp 7 together with the stopper 2 are attached to the lower end of the other end of the horizontal frame 5. It is provided.

  The structure of the safety net device will be described in more detail. The horizontal frame 5 of each bracket 1 can be fixed to a required position by being slidably fitted to the fixed frame member 10 having a rectangular tube shape and the fixing member 10. A rectangular frame-shaped slide frame member 11, and a tightening screw 8 is screwed to a rectangular tube-shaped mounting frame member 12 that is suspended and connected to the indoor side end of the slide frame member 11. A presser foot 9 is attached to the distal end portion of 8, and a rotary operation rod 13 is attached to the proximal end portion of the tightening screw 8.

  As shown in FIG. 2, a large number of screw holes 14 are provided at a predetermined pitch in the fixed frame member 10 of the horizontal frame 5, and three bolt insertion holes 15 are formed in the slide frame member 11 that is externally fitted to the fixed frame member 10. When the brackets 1 and 1 are fixed to the parapet P with the clamp 7, the slide frame member 11 is slid with respect to the fixed frame member 10, and the three bolt insertion holes 15 of the slide frame member 11 are adjusted. The position of the mounting frame member 12 is set in advance by screwing the butterfly bolt 16 into the corresponding two screw holes 14 on the fixed frame member 10 side from two of the holes.

  As shown in FIG. 2, the standing frame 6 of each bracket 1 includes a rectangular tubular lower frame member 17 and a rectangular tubular upper frame member that is detachably connected and fixed to the upper end portion of the lower frame member 17. 18 is provided with a mounting frame member 17a projecting from the lower end portion of the lower frame member 17, and a rectangular plate-shaped stopper 2 (FIG. 3) facing the presser foot 9 at the tip of the mounting frame member 17a. And FIG. 8) are fixedly attached. A connecting end 17b having a small-diameter cylindrical shape is integrally provided at the upper end of the lower frame member 17, and the upper frame member 18 is externally fitted to the connecting end 17b and fixed by a butterfly bolt 19. It is like that. Thus, by dividing the standing frame 6 of the bracket 1 into the lower frame member 17 and the upper frame member 18 and disassembling and folding them when not in use, the bracket 1 is not bulky and convenient for transportation and storage.

  The clamp 7 includes a tightening screw 8 screwed to an attachment frame member 12 suspended from the fixed frame member 10 of the horizontal frame 5, and a presser foot 9 attached to the tip of the tightening screw 8. It is composed of a metal pad 2 attached to the tip of the attachment frame member 17a protruding from the lower frame member 17 of the upright frame 6, and the tightening screw 8 is rotated by the rotation operation rod 13, The bracket 1 is pressed and fixed to the outdoor side wall Pa and the indoor side wall Pb of the parapet P via the pad frame 3 by bringing the stopper 2 and the presser 9 close to each other. A ring 20 is attached to the horizontal frame 5 at the indoor side end of the fixed frame member 10, and a ring 21 is attached to the upright frame 6 at the upper end portion of the upper frame member 18.

  As shown in FIGS. 4 and 5, the horizontally long abutting frame 3 has a standing plate portion 3 a whose back side is in contact with the outdoor side wall Pa of the parapet P, and a cross-section downwardly formed at the upper end portion of the standing plate portion 3 a. It consists of a U-shaped engaging portion 3b and a horizontal plate portion 3c protruding horizontally from the lower end of the engaging portion 3b to the front side lower end portion of the standing plate portion 3a. Is fixed by welding. A large number of screw shafts 23 project at a constant pitch along the length of the abutment frame at the lower end of the outdoor side wall of the upright plate portion 3a to which the reinforcing plate 22 is attached. Are screwed together.

  4, 6, and 8, reference numeral 25 denotes a belt-like presser plate, and the presser plate 25 is fitted into a large number of screw shafts 23 protruding from the lower end portion of the upright plate portion 3 a of the abutment frame 3. Holes 26 are formed at the same pitch as the screw shaft 23.

  The net 4 is formed in a rectangular sheet shape as shown in FIG. 4 by a net-like net body 27 and a non-mesh-like fabric 28 sewn to the lower side of the net-like net body 27. An edge cloth 29 is sewn, and eyelet holes 30 are attached to the periphery of the net 4 to which the edge cloth 29 is sewn, at the same pitch as the pitch of the screw shaft 23 and the hole 26. In addition, as for the edge cloth 29 sewn on the net peripheral part, the lower end side edge cloth of the net 4 is 29a, the upper end side edge cloth is 29b, and the left and right end side edge cloths are 29c.

  Further, as shown in FIG. 4, a strap 31 for attaching the net is attached to the eyelet holes 30 at the four corners of the net 4 and the eyelet hole 30, for example, from the end of the upper end edge of the net 4. .

  When using the safety net device for parapet work configured as described above, first, nuts 24 are removed from the screw shafts 23 projecting from the standing plate portion 3a of the abutment frame 3 as shown in FIG. The eyelet 30 of the lower end side edge cloth 29 of the net 4 is inserted into the screw shaft 23, and the hole 26 of the presser plate 25 is further inserted, and then the nut 24 is screwed into the screw shaft 23 and tightened. The lower end side edge cloth 29a of the net 4 is sandwiched between the presser plate 25 and the upright plate portion 3a of the abutment frame 3, and the abutment frame 3, the net 4 and the presser plate 25 are assembled together. The abutting frame 3, the net 4, and the presser plate 25 are always in such a state that they are integrally assembled in this way.

  Thus, as shown in FIG. 1, when carrying out a chipping operation in which the crack portion generated on the upper surface of the parapet P is scraped off to the required depth by the drill D, a pair of left and right brackets 1, 1 are attached to both sides of the chipping site H. The engaging portion 3b of the abutting frame 3 to which the lower end side edge cloth 29a of the net 4 is attached is hung between the braces 2 and 2 of the brackets 1 and 1 at a required interval. 8A and 8A, the rotary operation rod 13 of the clamp 7 of each bracket 1 is rotated so that the presser foot 9 is pressed against the indoor side wall Pb of the parapet P, and the stopper 2 is attached. Thus, the abutment frame 3 is abutted against the outdoor side wall Pa of the parapet P, whereby the brackets 1 and 1 and the abutment frame 3 are fixed on the parapet P.

  After fixing both the brackets 1 and 1 and the abutment frame 3 on the parapet P, the lower end side edge cloth 29a lifts the upper end side edge cloth 29b side of the net 4 attached to the abutment frame 3, and both the brackets 1 and 1 are connected. 1 and 3 are stretched between the standing frame 6 and the horizontal frame 5 of each bracket 1, and the net 4 is stretched between the compatible frames 6 and 6. State as shown.

  In order to stretch the net 4 between the brackets 1, 1, as shown in FIG. 4, the straps 31 attached to the inward positions from both ends of the upper end side edge fabric 29 b of the net 4 are attached to each bracket 1. After being hooked and tied to the ring 21 provided at the upper end of the standing frame 6, the left and right end portions of the net 4 are pulled indoors from the state of being locked to the standing frames 6 and 6 of the brackets 1 and 1, As shown in FIG. 1, the straps 31 attached to both ends of the upper edge fabric 29b of the net 4 and the straps 31 attached to the lower fabric 29a of the net 4 are attached to the brackets 1 as shown in FIG. By hooking and binding to a required portion of the horizontal frame 5, a state as schematically shown in FIGS. 1 to 3 is obtained, whereby the upper surface of the parapet P is surrounded by the net 4 on the outdoor side of the chipping work location H and on the left and right sides thereof. And pa Outdoor side pet P so that the lower side of the net 4 is a bag-like as shown in FIGS. 2 and 8 receive the concrete shavings or the like.

  The safety net device for parapet work as described above can be easily and easily installed in a narrow range that surrounds the outdoor side and the left and right sides with the work point as the center when carrying out the work such as chiseling on the upper surface of the parapet P. Parapet work such as chiseling can be performed at a very low cost without temporarily setting up a framework scaffold.

  In the use of this safety net device for parapet work, when scraping work is performed with the drill D on the upper surface of the parapet P, the concrete shavings and the like scattered from the parapet P to the outdoors are received by the net 4 and dropped to the outdoors. Can be avoided and dangerous situations can be avoided.

  Further, since the net 4 is composed of a net-like net main body 27 and a fabric 28 sewn to the lower side of the net-like net main body 27, the fine shavings of concrete, especially powder generated during the chiseling operation and scattered outside. Since the grains and the like are received by the fabric 28 formed on the lower side of the net 4, they can be prevented from being discharged and dropped to the outside, and the upper side of the net 4 is net-like except for the fabric 28. The wind pressure applied to the net 4 can be reduced.

  The horizontal frame 5 of each bracket 1 includes a fixed frame member 10 and a slide frame member 11 that is slidably fitted to the fixed member 10 and can be fixed at a required position. Since the fastening screw 8 is screwed to the hanging attachment frame 12 and the presser foot 9 is attached to the distal end portion of the fastening screw 8, the stopper 2 and the distal end of the fastening screw 8 constituting the clamp 7. When adjusting the distance between the presser foot 9 and the presser foot 9, the rough adjustment is performed by the slide frame member 11, and then the tightening screw 8 for fine adjustment is rotated to facilitate the clamping operation.

  The standing frame 6 of each bracket 1 includes a lower frame member 17 and an upper frame member 18 that is detachably connected and fixed to the upper end portion of the lower frame member 17 and faces the parapet P from the lower end portion of the lower frame member 17. Since the stopper 2 is attached to the tip of the mounting frame member 17a projecting in the direction, the upper frame member 18 can be removed when not in use so that the standing frame 6 can be disassembled without being bulky. Convenient for storage.

  In addition, as shown in FIG. 1, the safety rope 32 is attached to the rings 20 and 20 each attached to the indoor side edge part of the fixed frame material 10 which comprises the horizontal frame 5 of both the brackets 1 and 1. As shown in FIG. The safety rope 32 is attached to a fixed structure such as a support on the roof on the base end side, and when the safety net device is attached to or removed from the parapet P, the safety net device falls from the parapet P to the outside. This is to prevent this from happening.

  Further, as shown in FIG. 8, a rubber cushion sheet 33 may be attached to the back surface side of the upright plate portion 3a of the abutting frame 3, so that the abutting frame 3 is in close contact with the outdoor side wall Pa of the parapet P. It can be applied with good stability, and even if the bracket 1 vibrates to some extent, the application frame 3 does not rattle.

It is the external appearance perspective view which looked at the safety net device for parapet work concerning the present invention from the indoor side of the parapet. It is a vertical side view of the same apparatus. It is the front view which looked at the same apparatus from the outdoors of the parapet. It is a perspective view which shows an abutment frame, a net | network, and a presser plate in the state of falling apart. (a) is a partially enlarged front view of the contact frame, and (b) is a sectional view taken along line XX of (a). (a) is a partially enlarged front view of the presser plate, and (b) is an end view. (a) is the YY line expanded sectional view of FIG. 4, (b) is the ZZ line expanded sectional view of FIG. (a) is a partially enlarged front view of a state in which a holding frame is suspended between the metal fittings of both brackets, and (b) is a cross-sectional view taken along line VV of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bracket 2 Pad 3 Pad frame 4 Net 5 Horizontal frame 6 Standing frame 7 Clamp 8 Clamping screw 9 Presser foot 10 Fixing member 11 Slide frame material 12 Mounting frame material 17 Lower frame material 18 Upper frame material

Claims (4)

  A vertical frame is connected to one end of the horizontal frame, a stopper is provided on the lower end of the vertical frame, and a pair of left and right screws are provided on the other end of the horizontal frame. A horizontally long batting frame that is hung between the bracket and the brace of both brackets with a predetermined interval and whose back side is in contact with the outdoor side wall of the parapet, and a lower edge along the front side lower end of the batting frame The bracket is attached to the parapet at a predetermined interval, the abutment frame suspended between the brackets of both brackets is brought into contact with the outdoor side wall of the parapet, and the presser foot is attached to the indoor side wall. Both brackets are fixed to the parapets with clamps in a state where they are in contact with each other, and the net is stretched between the compatible frames of both brackets by lifting the top edge of the net whose bottom edge is attached to the abutment frame. of Parapet working safety net apparatus that stretches between the standing frame and the horizontal frame of each bracket right both ends.   The horizontal frame of each bracket includes a fixed frame member and a slide frame member that is slidably fitted to the fixed member and can be fixed at a required position, and the fastening screw is attached to the mounting frame member that is suspended and connected to the slide frame member. The safety net device for parapet work according to claim 1, wherein a presser foot is attached to a tip end portion of the tightening screw.   The standing frame of each bracket is composed of a lower frame member and an upper frame member that is detachably connected and fixed to the upper end portion of the lower frame member, and protrudes in a direction facing the parapet from the lower end portion of the lower frame member. The safety net device for parapet work according to claim 1 or 2, wherein the stopper is attached to a tip portion of an attachment frame member.   The safety net device for parapet work according to any one of claims 1 to 3, wherein the net includes a net-like net body and a fabric sewn to a lower side thereof.

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