JP3162625U - Roof top safety bracket - Google Patents

Abstract

An object of the present invention is to provide a roof work safety bracket for safely performing work on a roof. The safety bracket (21) is configured to perform work on the roof in a state in which the lifeline (22) of the worker is connected to the safety bracket (21) fixed to the roof. A seat plate (23) fixed to the roof by (26), a support column (24) erected from the seat plate, and a ring bracket (25) rotatably attached to the support column. The ring bracket (25) forms a window opening (36) opened so as to face between the bearing portions (34, 34), and when the support column (24) is inserted through the bearing portions (34, 34), The opening of the window opening (36) is closed. The bearing portion (34) is supported on the flange (33) of the support post (24), and a retaining nut (40) is screwed onto the bolt portion (32) of the support post so as not to hinder the rotation of the ring bracket. [Selection] Figure 3

Description

The present invention relates to a safety fitting for work on a roof for safely performing work on the roof.

Conventionally, when roofing roofs, installing solar panels, and other various rooftop work, the safety of work is secured by connecting the lifeline of the worker to a safety bracket fixed on the roof. .

At this time, in order to facilitate the movement of the worker on the roof, a pair of safety brackets are fixed at intervals on the top of the roof ridge, and the master rope spanned over the safety bracket and the master rope are slid. It has been proposed that a lifeline is composed of freely connected child ropes, and the child ropes are connected to a safety belt of the worker's body.

JP-A-8-53914 JP 2000-45536 A

By the way, such a safety fitting is, for example, a seat plate fixed to a base plate through a fixing tool such as a screw, a bolt standing on the seat plate, and an upper end portion of the bolt. A safety bracket made of eyenuts (hereinafter referred to as “comparative example”) can be proposed.

In the case of the safety bracket of the comparative example, the bolt forms a male screw over the entire axial length, the lower end of the bolt is screwed to the nut welded to the seat plate, and the nut of the eye nut is screwed to the upper end of the bolt. Can be assembled.

When working on the roof, at least a pair of safety brackets are fixed at intervals in the high part of the roof, the master rope is fixed to the ring part of the eyenut of each safety fixture, and the child rope is slidable on the master rope By connecting to, the safety of the worker is ensured.

However, when an operator works while walking on the roof, the parent rope connected to the child rope vibrates while repeating tension and relaxation, and transmits the vibration to the eyenut.

Therefore, in the case of the comparative example, when the ring portion of the eyenut is subjected to the vibration of the parent rope, the screwing may be loosened due to the vibration or the tensile angle of the parent rope, and in some cases, the screwing may be released.

In addition, when the diameter of the ring portion of the eyenut is small, it is necessary to interpose a shackle or the like for connecting the master rope. In this case, it is not preferable that the number of parts is increased and the number of work steps is increased at a high place. Invite results.

The present invention provides a roof work safety bracket that solves the above-mentioned problems, and is constructed as a means for connecting an operator's lifeline to a safety bracket (21) fixed on the roof. In the configuration in which the work is performed on the roof in a state, the safety bracket is a seat plate fixed to the roof by a fixing tool, a support column standing from the seat plate, and a removable attachment that is rotatably attached to the support column The support column has a flange fixed to an intermediate portion in the axial direction, and a bolt portion is formed at the upper end of the shaft. The support bracket is formed from a bearing portion that is rotatably inserted on the support column. A mounting portion is extended sideways, a shaft rod for attaching a master rope is formed in the mounting portion through a window opening, and the bearing portion of the ring metal fitting is supported on the flange and is extrapolated to a column. , A retaining nut to prevent the rotation of the ring bracket on the bolt part of the post It is in the point formed by screwing.

In a preferred embodiment of the present invention, the ring bracket comprises a mounting portion in which a window opening is formed by a pair of arms extending laterally from a pair of bearing portions arranged vertically and a shaft rod connecting the arms. The window opening is opened between the upper and lower bearing portions, and the opening portion of the window opening is closed by a column inserted through the upper and lower bearing portions.

When the inclination direction of the roof is the inclination axis (X) and the horizontal direction perpendicular to the inclination axis (X) is the intersection axis (Y), the seat plate is folded in the vertical direction of the intersection axis (Y). It is preferable to form a load-bearing rib against the music.

The load-bearing ribs may be formed by bending upward both side edges of the seat plate extending substantially parallel to the intersecting axis (Y).

According to the first aspect of the present invention, the ring bracket 25 is rotatably extrapolated from the support column 24 erected on the seat plate 23 with the bearing portion 34 supported by the flange 33. Since the retaining nut 40 is screwed to the bolt portion 32 so as not to prevent the rotation of the ring fitting 25, the ring fitting 25 freely rotates around the column 24 and transmits the rotational force to the column 24. Therefore, it is difficult to be affected by the vibration from the lifeline 22 or the tension angle of the lifeline 22, and there is no possibility of loosening of the screwing in the bolt portion of the support column 24 in the future, thereby ensuring the safety of the operator.

The safety bracket 21 of the present invention can be used by attaching the master rope 22A of the lifeline 22 or by directly attaching the slave rope 22B. In this case, the ring bracket 25 is pulled by the slave rope 22B. It is possible to take a free posture in the range of 360 degrees around the support column 24 toward the direction, and it is possible to suitably cope with the walking movement of the worker.

In this case, according to the second aspect of the present invention, when the safety fittings 21 are lined up on the roof and the master rope 22 is bridged, the seat plate 23 on which the pillars 24 are erected is fixed to a fixing tool such as a screw. 26, the main rope 22 is connected to the ring bracket 25 in a freely separated and independent state, and then each ring bracket 25 is attached to the support 24 of the safety bracket 21 together with the parent rope 22. This makes it easier to work in dangerous high places.

Moreover, in the unlikely event that the operator slips or falls, and an impact with a strong tensile force P is applied to the ring fitting 25 from the lifeline 22, the ring fitting 25 narrows the opening portion of the window opening 36. Since the arms 38 and 38 can be deformed to each other, a load absorbing effect at the time of impact can be expected.

According to the third or fourth aspect of the present invention, even when the support column 24 is tilted by the strong tensile force P due to the operator's falling or the like, the folding force of the seat plate 23 is folded by the load-bearing rib 30. While preventing the bending deformation and allowing the upward arc-shaped deformation of the end portion 23c that generates the upward force U, the end portion 23b that generates the downward force D is prevented from being sunk into the base plate 27 and damaged. There is no risk of the safety fitting 21 falling off due to the detachment of the fixing tool 26, and the safety of the operator can be ensured.

It is a perspective view which shows the state which fixed the safety metal fitting which concerns on one Embodiment of this invention on the roof, and bridged the master rope. It is a perspective view which shows the method of bridging a master rope in the state which fixed the safety metal fitting which concerns on one Embodiment of this invention on the roof. It is a perspective view which shows the decomposition | disassembly state of the safety metal fitting which concerns on one Embodiment of this invention. It is a perspective view which shows the assembly state of the safety metal fitting which concerns on one Embodiment of this invention. It is sectional drawing which shows the state which fixed the safety metal fitting which concerns on one Embodiment of this invention on the roof. It is a perspective view which shows the effect | action of the strength rib in the safety metal fitting which concerns on one Embodiment of this invention. It is a perspective view which shows another embodiment of a load-bearing rib.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, when the inclination direction of the roof is the inclination axis X and the horizontal direction orthogonal to the inclination axis X is the intersection axis Y, at the high position of the roof with respect to the inclination axis X, A plurality of safety fittings 21 are fixed at intervals in the direction. In the example of the illustrated embodiment, the lifeline 22 is composed of a master rope 22A and a child rope 22B, and among the three safety fittings 21 fixed to the roof, the safety fittings 21 arranged at both ends are the parent rope 22A. The safety bracket 21 arranged in the middle of the support means 21a constitutes the guide means 21b of the master rope 22A. However, the present invention does not ask the number of safety brackets 21 to be fixed. For example, one safety bracket 21 may be fixed and the baby rope 22B may be directly attached to the safety bracket 21. . The place where the safety bracket 21 is fixed may be in the vicinity of the top of the ridge, but it is a relatively high place with respect to the work area of the worker, and is opposite to the direction in which the worker on the roof falls. It is preferable to use this location.

The safety bracket 21 includes a seat plate 23, a support column 24 erected from the seat plate 23, and a detachable ring bracket 25 that is rotatably attached to the support column 24. It is used in a state of being fixed to the roof by a fixing tool 26 such as a book screw or nail. The fixing tool 26 enters the base plate 27 or the rafter below the base plate, and firmly fixes the seat plate 23 (see FIG. 5).

In the example of the illustrated embodiment, as shown in FIG. 1, the master rope 22A is movably inserted into the ring fitting 25 of the safety fitting 21 (21b) disposed in the middle and provided at both ends of the master rope 22A. The loop 22a is inserted into the ring fitting 25 of the pair of safety fittings 21 (21a) arranged at both ends. One end of the child rope 22B is slidably connected to the intermediate portion of the parent rope 22A via a connecting fitting or the like, and the other end of the child rope 22B is connected to a safety belt attached to the operator's body. The lifeline 22 is composed of the rope 22A and the child rope 22B.

When the safety fittings 21 are arranged on the roof and the master rope 22A is bridged, as shown in FIG. 2, each safety fitting 21 is attached to the seat plate 23 with the fastener 26 in a state where the ring fitting 25 is removed. It is fixed at a predetermined place on the roof. As a result, the ring bracket 25 is in a freely separated and independent state, so that the master rope 22A is inserted into the ring bracket 25 of the safety bracket 21 (21b) disposed in the middle, and the safety brackets disposed at both ends. After inserting the loop 22a of the parent rope 22A into the ring fitting 25 of 21 (21a), each ring fitting 25 together with the parent rope 22A can be attached to the column 24 of the safety fitting 21, so that the work can be performed at a dangerous height. To make it easier.

By the way, as shown in FIG. 1, when an operator walks and moves on the roof in a state where the child rope 22B is connected, the parent rope 22A vibrates while repeating tension and relaxation, and the vibration is the safety bracket 21. Is transmitted to the ring bracket 25. At this time, since the ring bracket 25 is rotatably attached to the support column 24, as shown by an arrow R in the figure, it freely rotates according to the vibration and the pulling angle of the master rope 22A. For this reason, the rotational force of the ring bracket 25 is not transmitted to the support column 24.

In the unlikely event that the operator slips or falls, and the tensile force P acts on the parent rope 22A from the child rope 22B, a load T due to the impact of the parent rope 22A is applied to the safety fitting 21, but this will be described later. As described above, the impact load is absorbed by the deformation of the ring metal fitting 25, and the safety rib 21 is prevented from falling off by the load-bearing rib of the seat plate 23, thereby ensuring the safety of the operator.

As shown in FIGS. 3 to 5, the seat plate 23 is formed in a substantially rectangular plate shape with a metal plate having a necessary and sufficient strength, and a fixing nut 28 is fixed to the center of the upper surface by welding or the like. A plurality of holes 29 are provided on both sides of the fixing nut 28 as a set. At this time, as shown in the drawing, it is preferable that the holes 29 that are set as a pair are arranged in the direction of the inclined axis X with respect to the fixing nut 28, and the plurality of holes 29 that constitute each set are mutually connected. It is preferable to dispose the position in the direction of the cross axis Y.

The seat plate 23 forms load bearing ribs 30 that resist bending in the vertical direction of the cross axis Y. In the case of the embodiment shown in FIGS. 3 to 5, the strength ribs 30, 30 are formed by bending the side edges 23 a, 23 a of the seat plate 23 extending substantially parallel to the intersecting axis Y upward.

The support column 24 is formed of a metal or other rod or pipe having a necessary and sufficient strength, and forms a lower bolt portion 31 by providing a male screw at a lower end shaft end portion, and an upper end shaft end portion. The upper bolt part 32 is formed by providing a male screw on the flange 33, and the flange 33 is fixed to the axial intermediate part 24a as a shank blank by welding or the like.

The ring bracket 25 is formed by forging or pressing a metal or other rod or pipe having a necessary and sufficient strength, and from a bearing portion 34 that is rotatably inserted into the intermediate portion 24a of the column 24. A mounting portion 35 is extended sideways, and a shaft rod 37 for attaching a lifeline is formed in the mounting portion 35 through a window opening 36.

In the case of the illustrated embodiment, the ring bracket 25 has a window opening 36 formed by a pair of arms 38, 38 extending laterally from a pair of bearing portions 34, 34 arranged vertically and a shaft rod 37 connecting the arms. The formed mounting portion 35 is configured, and the window opening 36 is opened between the upper and lower bearing portions 34 and 34, and as shown in FIG. When the intermediate portion 24a is inserted, the opening portion of the window opening 36 is closed by the intermediate portion 24a.

Therefore, the seat plate 23 and the support column 24 are assembled to each other by screwing the lower bolt portion 31 to the fixing nut 28, whereby the support column 24 is erected on the seat plate 23. At this time, if necessary, a lock nut 39 for preventing loosening may be screwed onto the lower bolt portion 31.

In addition, the support 24 and the ring bracket 25 are configured so that the upper and lower bearing portions 34 and 34 are attached to the intermediate portion 24 a of the support 24 while the lower bearing portion 34 is supported on the flange 33. They are assembled together by extrapolating and screwing the retaining nut 40 onto the upper bolt part 32, whereby the ring bracket 25 is pivotally supported by the support column 24. At this time, a lock nut 41 for preventing loosening may be screwed onto the upper bolt portion 32 as necessary.

The retaining nut 40 is screwed so as not to hinder the rotation of the ring bracket 25. For example, as shown in FIG. 5, even when the retaining nut 40 is firmly fastened to the upper bolt portion 32, the upper nut portion 40 forms a gap S with the upper bearing portion 34. The male screw of the bolt part 32 is formed only at the shaft end part at the upper end of the support column 24. As a result, the ring fitting 25 is free to rotate around the axis of the intermediate portion 24a and not rotate the retaining nut 40 in a state where the lower bearing portion 34 is supported by the flange 33.

As described above, when the plurality of safety fittings 21 are arranged on the roof and the master rope 22A is bridged, each safety fitting 21 is attached to the base plate 27 by the fixing tool 26 with the seat plate 23 erected with the column 24. It is fixed to. At this time, the seat plate 23 is disposed with the load-bearing ribs 30 oriented substantially parallel to the cross axis Y. The ring bracket 25 is connected to the master rope 22 </ b> A before being attached to the column 24. Both ends of the master rope A22 are attached to the shaft rod 37 by passing one bearing portion 34 from the opening portion of the window opening 36 through the loop 22a. Can be rotatably attached to the column 24. The ring fitting 25 of the safety fitting 21 arranged at the intermediate position is inserted into the master rope 22A through the window opening 36 before being attached to the column 24, and is then rotatably attached to the column 24. Thus, after the master rope 22A is connected to the ring bracket 25 in a free state separated and independent from the column 24, the ring bracket 25 can be attached to the column 24, so that work at a dangerous high place is easy. Become.

Since all the safety fittings 21 arranged on the roof 8 have the ring fitting 25 rotatable, the safety fitting 21 rotates corresponding to the vibration and the pulling angle of the master rope 22A, and the rotation of the ring fitting 25 rotates. Is not transmitted to the column 24. Although not shown in the drawings, the same applies to the case where the cord 22B is directly attached to the ring bracket 25 for use.

By the way, if the operator slips or falls, and the load T is applied to the safety fitting 21 due to the impact accompanied by the strong tensile force P of the lifeline 22 (master rope 22A in the illustrated example), Due to the moment, the support column 24 is tilted at an angle θ shown in FIG. Thereby, the ring bracket 25 receives an impact load accompanied by a component force in the tilt direction of the support column 24, and the seat plate 23 receives the bending force in the vertical direction of the cross axis Y, whereby the end on the side toward which the load T is directed. A downward force D is generated in the portion 23b, and an upward force U is generated in the opposite end portion 23c.

As described above, since the ring bracket 25 faces the upper and lower bearing portions 34 and 34 and opens the window opening 36, the upper bearing portion 34 is supported by the retaining nut 40 in the state described above. 6, the lower bearing portion 34 can move upward through deformation of the lower arm 38, as shown by a chain line in FIG. 6. By deforming so as to narrow the opening, it is possible to absorb the load at the time of impact.

Further, as described above, the seat plate 23 is fixed to the base plate 27 by the fixing tool 26 on both sides in the direction of the tilt axis X of the support column 24. Therefore, the end 23c that generates the upward force U is separated from the base plate 27. Try to float up. However, since both side edges 23a, 23a of the seat plate 23 form strength-bearing ribs 30, 30 that resist the bending force, the side edges 23a, 23a are not allowed to be bent and deformed. As described above, the end portion 23c located between the load-bearing ribs 30 and 30 is allowed to float from the base plate 27 while being deformed in an upward arc shape. Therefore, the strength ribs 30, 30 prevent the seat plate 23 from being broken into two, and prevents the fixing tool 26 from being pulled out from the field plate 27.

On the other hand, if the seat plate 23 has a completely rigid structure in the direction of the cross axis Y, the end 23b that generates the downward force D is not only damaged by the base plate 27 but also damaged. There is a risk that the fixing tool 26 is detached from the formed field plate 27. In this regard, as described above, the embodiment of the present invention is configured to allow the end portion 23c to be lifted in a minimum range while being deformed in an upward arc shape. However, the end 23b is preferably prevented from being recessed into the base plate 27.

FIG. 7 shows another embodiment of the load-bearing ribs 30, and four load-bearing ribs 30 are fixed in the diagonal direction on the upper surface of the seat plate 23 by welding or the like. Also in this case, when a strong moment is applied to the support column 24, the bearing rib 30 prevents the seat plate 23 from being folded in a double fold shape, and the upward arc-shaped deformation of the end 23c that generates the upward force U is prevented. By allowing it, it is possible to prevent the end portion 23 b that generates the downward force D from being recessed into the base plate 27.

21 Safety bracket 21a Support means 21b Guide means 22 Parent rope 23 Seat plate 23a Side edge 23b, 23c End 24 Strut 24a Intermediate part 25 Ring bracket 26 Fixing tool 28 Fixing nut 29 Hole 30 Strength bearing rib 31 Lower bolt part 32 Upper bolt portion 33 Flange 34 Bearing portion 35 Mounting portion 36 Window opening 37 Shaft 38 Arm 39, 41 Lock nut 40 Locking nut

Claims (4)

In the configuration to work on the roof in a state where the lifeline of the worker is connected to the safety bracket (21) fixed on the roof,
The safety fitting (21) includes a seat plate (23) fixed to the roof by a fixing tool (26), a support column (24) erected from the seat plate, and a ring rotatably attached to the support column. With metal fittings (25)
The strut (24) has a flange (33) fixed to the axial intermediate portion (24a), and a bolt portion (32) is formed at the upper end of the shaft,
The ring bracket (25) has a mounting portion (35) extending laterally from a bearing portion (34) rotatably inserted on the support post (24), and the mounting portion is provided with a window opening (36). Form a shaft (37) for attaching a lifeline,
The bearing (34) of the ring fitting (25) is extrapolated to the column (24) in a state of being supported on the flange (33), and the bolt (32) of the column does not hinder the rotation of the ring fitting. A safety bracket for work on the roof, which is formed by screwing a retaining nut (40) as described above. The ring bracket (25) is a window formed by a pair of arms (38, 38) extending laterally from a pair of bearing portions (34, 34) arranged vertically and a shaft rod (37) connecting the arms. A support column (35) having an opening (36) is formed, the window opening (36) is opened between the upper and lower bearing portions (34, 34), and the column is inserted into the upper and lower bearing portions. The on-roof work safety fitting according to claim 1, wherein the opening portion of the window opening (36) is closed by (24). When the inclination direction of the roof is the inclination axis (X) and the horizontal direction perpendicular to the inclination axis (X) is the cross axis (Y), the seat plate (23) is above and below the cross axis (Y). The safety fitting for work on the roof according to claim 1 or 2, wherein a load bearing rib (30) is formed to resist bending in a direction. The load-bearing rib (30) is formed by bending upward both side edges (23a, 23a) of a seat plate (23) extending substantially parallel to the intersecting axis (Y). The safety bracket for roof work according to claim 3.

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