JP5576056B2 - Guards for preventing workers from falling - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an operator fall prevention protective cross that is horizontally bridged between struts across a substantially triangular gap generated below the crossing of the crossing straddles between the columns of the building scaffold of the framework scaffold. .

  In a framework scaffold temporarily installed at a construction site, as shown in FIG. 13, an X-shaped cross brace 3 comprising a pair of brace members 3a, 3a between columns 1, 1 along both longitudinal sides of the scaffold plate F1. Since this is stretched, the cross 3 is a safety fence, and the safety of the worker who crosses the scaffolding board F1 can be achieved. However, as shown in the figure, since the cross 3 is in a state where a gap C is generated in a substantially triangular shape between the lower side and the scaffold plate F1, the worker can use the scaffold plate F1. There is a risk of falling over from the triangular gap C when working with a middle waist. Therefore, in order to prevent such a danger, the bar-shaped worker fall prevention guard 4 is horizontally and crossed over the bracing members 3a, 3a forming the lower triangular gap C of the cross bracing 3. ing. In addition, the frame scaffold F is formed in a gate shape by a pair of pillars 1 and 1 on both sides forming the building frame P and a cross member 14 that connects both pillars 1 and 1. A scaffolding plate F1 is bridged between the opposing cross members 14 and 14 of the adjacent support columns 1 and 1, and this is sequentially framed upward.

  The conventional worker fall prevention guard 4 is described in, for example, Patent Document 1, and comprises a single bar-shaped guard 4 as schematically shown in FIG. 13 and FIG. 12 showing the main part thereof. Therefore, a mounting bracket 15 having a complicated structure for attaching the bracing members 3a, 3a is provided at each of both ends of the protection bar 4, so that the protection bar 4 is attached to the bracing member 3a by the mounting bracket 15. It has become.

JP-A-10-331413

  In order to attach the protection bar 4 to the bracing member 3a as described above, the mounting bracket 15 having a rather complicated structure must be used. Moreover, as can be seen from FIGS. 12 and 13, for example, the protection bar 4 crosses the brace. 3, the protection bar 3 is positioned considerably above the middle portion of the gap C, and the effect of effectively dividing the gap C into two is not sufficiently improved.

  Therefore, it is conceivable that both ends of the protection beam having a length corresponding to the length between the opposing support columns 1 and 1 are provided on the support columns 1 and 1 by welding or the like. In this case, it is called gravity lock, but it is to be attached to the mounting pin 2. However, as shown in FIG. 11, the currently used general-purpose cross bracing attachment gravity lock, that is, the attachment pin 2, has an effective length Le of only 18 mm, for example. That is, as shown in FIG. 11, this type of mounting pin 2 protrudes from the surface of the pin by the urging force of a spring such as a helical spring provided inside with a lock claw 16 provided at the tip thereof, and is splashed. It is attached so as to be able to protrude and retract from the mounting pin 2 in the illustrated rotation range so as to be immersed in the pin against the urging force of the pin. It becomes the length Le. On the other hand, the bracing member 3a that forms the cross brace 3 is generally made of a tubular material having a thickness of 1.9 mm, and both ends thereof are crushed into a flat plate shape by pressing, and a mounting portion having a thickness of 3.8 mm. 3a1 is formed, which is formed at both ends of the bracing member and is attached to the mounting pin 2. Therefore, the occupied thickness is doubled to 7.6 mm. The arm lock 13 has a thickness of 3 mm. Therefore, a thickness of 7.6 mm + 3 mm = 10.6 mm is occupied by the mounting pins, and the remaining ends of the protection bar must be mounted within the effective mounting length range of 18 mm-10.6 mm = 7.4 mm. . However, the crosspiece main body 5 of the protective crosspiece 4 is also generally made of a tubular material having a thickness of 1.9 mm, like the bracing member 3a. Therefore, both ends can be crushed into a flat plate shape by pressing to form an attachment portion. For example, the thickness is 3.8 mm, the occupied thickness is doubled to 7.6 mm, and the effective mounting length Le of the mounting pin 2 exceeds 0.2 mm.

  In some cases, the arm lock 13 is not used, but in this case, the mounting pin 2 having a short effective length may be used.

  Therefore, the crosspiece main body 5 and the crosspiece main body attachment piece 6 of the protection crosspiece 4 are integrated, that is, the crosspiece body attachment piece 6 is formed by forming both ends of the crosspiece main body 5 into a flat plate shape by pressing. Although it can be manufactured at low cost, as described above, this exceeds the effective mounting length Le of the mounting pin 2 and cannot be employed.

  As shown in FIG. 12, the arm lock 13 is used to lock the connecting end portions when connecting the lower end portion of the upper support column 1 to the upper end portion of the lower support column 1 as shown in FIG. Used, it is formed in a bow shape with a belt-like metal plate, and pin holes are provided at both upper and lower ends thereof. The pin holes on the lower end side are connected to the upper end portion of the lower column 1 and the lower end of the upper column 1 Are inserted into the connecting pin 17 penetrating the upper end side, and the pin hole on the upper end side is connected to the crossing bracing mounting gravity switch 2 which is the mounting pin 2 provided on the upper column 1 and the crossing bar crossing on both sides 3, It is attached so as to overlap with the ends of the three bracing members 3a and 3a.

  In view of the circumstances as described above, the present invention, as described above, currently used in Japan, is a framed scaffold, that is, a gravity lock for mounting a cross brace that is projected from a column that forms a building frame, that is, for mounting. An object of the present invention is to provide a protection bar 4 in which the protection bar 4 can be attached using the pin 2 as it is.

Means for solving the above problems will be described with reference numerals in the embodiments described later. The protective frame for preventing the worker from falling according to the first aspect of the present invention includes a column 1 that forms a building frame P, In a frame scaffold F including a cross brace 3 that is engaged with a mounting pin 2 projecting from a post 1 and spans between the columns 1 and 1, a substantially triangular shape generated below the cross brace 3. In order to prevent an operator on the frame scaffolding F from accidentally falling from the gap C, the worker fall prevention guard 4 is mounted horizontally so as to cross the gap C, and crosses the gap C of the cross brace 3. It consists of a tubular crosspiece body 5 and a crosspiece body attachment piece 6 fixed to both ends of the crosspiece body 5. Flat tubular crimping stop portions 7 are formed at both ends of the tubular crosspiece body 5, and the crosspiece body attachment piece 6 is a plate-like caulking that can be fitted into the flat cylindrical caulking stopper 7. In the state in which the rivet portion 8 is formed and the plate-like caulking stop portion 8 of the crosspiece body mounting piece 6 is fitted to the flat cylindrical caulking stop portions 7 at both ends of the tubular crosspiece body 5, Clamping is performed over the stoppers 7 and 8 so that both are fixed .
Further, a concave notch 9 is formed in the plate-like caulking stop portion 8 of the crosspiece body attachment piece 6, and the crosspiece body attachment piece is attached to the flat cylindrical caulking stop portions 7 at both ends of the tubular crosspiece body 5. When the plate-shaped crimping stop portion 8 of FIG. 6 is fitted and the crimping stop portions 7 and 8 are squeezed, the recess stop portion 9 of the tubular bar body 5 is recessed in the concave notch portion 9. The concave surface 10 is formed by being caulked to a concave shape,
In addition, the opposite surface of the flat cylindrical caulking stopper 7 where the recessed surface 10 is formed is formed on the flat surface 19.

According to a second aspect of the present invention, there is provided a protection bar for preventing a worker from falling through the mounting hole 11 that can be engaged with the same mounting pin 2 with which the cross brace 3 is engaged with the crosspiece main body mounting piece 6. In addition to the existing plate-like attachment portion 12 being formed, the plate-like attachment portion 12 is adjacent to the intersection reinforcement 3 in addition to the existing thicknesses at both ends of the intersection reinforcement 3. It consists of the structure of Claim 1 formed in the thickness within the effective attachment length Le range of this attachment pin 2 so that it may superpose | attach and attach .

According to a third aspect of the present invention, there is provided a protection bar for preventing a worker from falling down. The same mounting in which the arm lock 13 mounted between the cross bar 3 and the upper and lower columns is overlapped and engaged with the bar body mounting piece 6. with plate-like mounting portion 12 which is formed through the Kakarihama possible mounting hole 11 to use the pin 12 weight combined and are formed, the upper and lower end portions of the both end portions of the existing thickness and arm lock 13 of the cross brace 3 In addition to the existing thickness, the plate-like mounting portion 12 is provided on the mounting pin 2 so as to be further superposed and attached to the mounting pin 2 adjacent to the cross 3 and the arm lock 13 overlapping therewith. It consists of the structure of Claim 1 formed in the thickness in the effective attachment length Le range .

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. According to the protection bar F for preventing the worker from falling according to the first aspect of the invention, it is generated below the cross bar 3. The crosspiece main body 5 is mounted horizontally so as to cross the substantially triangular space C, and the crosspiece main body attachment pieces 6 are fixed to both ends of the crosspiece main body 5. 5 is not integrated with the tubular crosspiece main body 5, but is attached to both ends of the tubular crosspiece main body 5. Even if both ends of the cross 3 are attached to 2, the crosspiece body attachment piece 6 having a thickness within the range of the effective attachment length Le of the attachment pin 2 is selected, and this is fixed to the tubular crosspiece body 5. If so, the operator falls in common with the mounting pin 2 to which the cross brace 3 is attached. Can be attached to sealing protective crosspiece 4, does not require special mounting bracket for attaching the worker fall prevention for protection crosspiece 4 in cross-brace 3, it can be mounted much cheaper. In addition, as compared to the conventional technique, the substantially triangular gap C generated below the cross bracing 3 can be mounted across the lower middle portion as much as possible, so that it can effectively prevent the operator from falling. be able to.

  Further, according to the present invention, the flat cylindrical caulking stoppers 7 are formed at both ends of the tubular bar main body 5, and the bar main body attaching pieces 6 can be fitted to the flat cylindrical caulking stoppers 7. A plate-like caulking stop portion 8 is formed, and the plate-like caulking stop portion 8 of the crosspiece body attaching piece 6 is fitted to the flat cylindrical caulking stop portions 7 at both ends of the tubular crosspiece body 5. In this state, the crosspiece main body attachment piece 6 is concentrically regulated by the tubular crosspiece main body 5 and, in this state, the two crimping fixing portions 7 and 8 are swaged and fixed so that they do not come out of each other. Therefore, the crosspiece main body attachment piece 6 can be firmly fixed to the tubular crosspiece main body 5 firmly and inexpensively and quickly and easily. On the other hand, although it is possible to fix the crosspiece main body attachment piece 6 to the tubular crosspiece main body 5 by welding work, in order to firmly attach the crosspiece main body attachment piece 6 to the tubular crosspiece main body 5, It must be welded over the entire circumference or front and back of the fixing portion, and the welding operation is troublesome, and a lot of time is taken for the welding operation. The fixing operation is expensive and cannot be fixed quickly and easily.

Further, in the protection bar for preventing the operator from falling according to the present invention, a concave notch 9 is formed in the plate-like caulking stop part 8 of the bar body mounting piece 6 , and the flat cylinders at both ends of the tubular bar body 5 are formed. Since the plate-like caulking stop portion 7 is fitted with the plate-like caulking stop portion 8 of the crosspiece main body attachment piece 6, the caulking stop portion 7 and 8 are swaged. The stop portion can bite into the concave cutout portion 9 and can be securely fastened, and the action of preventing the crosspiece body attachment piece 6 from coming off from the tubular crosspiece body 5 can be reliably achieved.

Moreover, the phenomenon that the caulking stopper 7 bites into the concave notch 9 can be easily detected because the caulking stopper 7 is crushed into a concave shape to form a concave surface 10. It is possible to reliably grasp the caulking stop action.
In particular, according to the present invention, the opposite surface on which the recessed surface 10 of the flat cylindrical caulking stop portion 7 is formed is formed on the flat surface 19, so that one end of the protection bar 4, for example, FIG. As shown in (b), the surface of the caulking stopper 7 on the left side in the figure forms a concave surface 10, and the surface of the caulking stopper 7 on the right side in the figure, for example, is flat at the other end of the protection bar 4. By caulking to form the surface 19, the caulking direction is different. When this is attached to the cross brace 3, the strengths of the caulking stoppers 7 and 8 at both ends of the protection bar 4 are complemented to each other. It fits and can be used more safely.

According to the protection bar for preventing the operator from falling according to the second aspect of the present invention, the same mounting pin in which the cross brace 3 is engaged with the main body mounting piece 6 together with the function and effect brought about by the first aspect. A plate-like attachment portion 12 is formed through an attachment hole 11 that can be engaged with 2. In addition to the existing thicknesses at both ends of the cross- bar crossing 3 , the plate-like attachment portion 12 includes the cross-bar crossing 3. to become formed to a thickness within the effective attachment length Le range adjacent to same mounting pins 2 pin with said mounting to be attached by polymerization in 2 to, the mounting pins 2 that attach the cross bracing 3 Since the operator fall prevention guard 4 can be attached in common and no special mounting bracket for attaching the worker fall prevention guard 4 to the cross brace 3 is required, it can be attached at a lower cost. . In addition, as compared to the conventional technique, the substantially triangular gap C generated below the cross bracing 3 can be mounted across the lower middle portion as much as possible, so that it can effectively prevent the operator from falling. be able to.

According to the worker fall prevention for protective bars of the invention according to claim 3, together with the action and effect provided by claim 1, said桟本body mounting piece 6, the arm lock mounted over between the cross braces 3 and vertical posts 13 The plate-like attachment part 12 which penetrated the attachment hole 11 which can be engaged with the same attachment pin 2 which overlap | superposed and engaged with each other is formed, and the existing thickness and arm of the both ends of the cross bar 3 are formed. In addition to the existing thicknesses of the upper and lower ends of the lock 13, the plate-like attachment portion 12 is attached to the attachment pin 2 by being superposed adjacent to the crossing bar 3 and the arm lock 13 overlapping therewith. to become formed to a thickness within the effective attachment length Le range of the mounting pins 2, cross braces 3, the arm lock 13 and polymerizing together three parties of the worker falling preventive protective bars in the same mounting pin 2 Can be attached, do not require special mounting bracket for attaching the worker fall prevention for protection crosspiece 4 in cross-brace 3, it can be mounted much cheaper. In addition, as compared to the conventional technique, the substantially triangular gap C generated below the cross bracing 3 can be mounted across the lower middle portion as much as possible, so that it can effectively prevent the operator from falling. be able to.

(A) is a front view of the worker fall prevention guard 4 according to the present invention, and (b) is a plan view. (A) is a front view of the tubular crosspiece main body which is a structural member of the said protection crosspiece, (b) is a top view, (c) is a side view. (A) is a front view of the crosspiece main body attachment piece which is another structural member of the said protection crosspiece, (b) is a top view. It is the sectional view on the AA line in (b) of FIG. It is BB sectional drawing in (b) of FIG. It is CC sectional view taken on the line in (b) of FIG. It is a front view which shows the use condition of one Embodiment in this invention. FIG. 8 is an enlarged front view of a T portion in FIG. 7. It is a cross-sectional plan view of the same part. It is a vertical side view of the same part. It is a figure explaining the effective attachment length Le in the attachment pin. It is a front view which shows the attachment state with respect to the crossing cross 3 of the conventional protection fall 4 for a worker fall prevention. It is a perspective view which shows the state which attached the protection guard 4 for the conventional worker fall prevention to the frame scaffold F. FIG.

  Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 (a) and 1 (b) are a front view and a plan view of a guard 4 for preventing a worker from falling according to the present invention. 2 and the crosspiece main body attachment pieces 6 and 6 fixed to both ends thereof. As shown in FIG. 2, the tubular crosspiece body 5 is flattened by pressing so that both ends thereof are flattened. Formed in portions 7 and 7. Further, as shown in FIG. 3, the crosspiece mounting piece 6 has a thickness L1 of, for example, 3.2 mm, and is a plate-like caulking stop portion 8 that can be appropriately fitted to the flat cylindrical caulking stop portion 7. And a plate-shaped mounting portion 12 wider than this, and a positioning step 18 is formed at the boundary between the plate-shaped mounting portion 12 and the crimping stop portion 8. Concave notches 9 and 9 are penetrated in the both side edges, and a long hole-like attachment hole 11 is penetrated in the center part of the plate-like attachment part 12.

And the positioning step part 18 which formed the plate-shaped caulking stop part 8 of the crosspiece main body attachment piece 6 in the flat cylindrical caulking stop part 7 of the both ends of the tubular crosspiece main body 5 and the crosspiece main body attachment piece 6 is a flat cylinder. Is fitted until it contacts the end surface of the rivet-shaped caulking stop portion 7 to accurately regulate the amount of protrusion of the crosspiece main body attachment piece 6 from the tubular crosspiece main body 5, and in this state, the press-working is performed over both the caulking stop portions 7, 8. By crimping so as to be crushed, the both 5 and 6 are firmly fixedly connected.
That is, a concave notch portion 9 is formed in the plate-like caulking stop portion 8 of the crosspiece main body attachment piece 6, and the flat cylindrical caulking stop portion 7 of the tubular crosspiece main body 5 is caulked to this portion. As shown in FIGS. 4 to 6, since the caulking stopper 7 exhibits the concave surface 10, it is possible to detect that both are securely crimped from the concave surface 10. The opposite surface of the flat cylindrical caulking stopper 7 where the concave surface 10 is formed is formed on the flat surface 19. For this reason, for example, as shown in FIG. 1B, the surface of the caulking stopper 7 on the left side in the figure forms a concave surface 10, and the surface of the caulking stopper 7 on the right side in the figure forms a flat surface 19. Since the caulking direction is different by caulking, the strength of the caulking stoppers 7 and 8 at both ends of the protection bar 4 complement each other when the caulking direction is attached to the cross brace 3. Can be used more safely.

  Further, by forming the mounting holes 11 penetrating the plate-shaped mounting portion 12 in the shape of a long hole as shown in the drawing, both ends of the protection bar 4 are erected on the pillars 1 and 1 which are erected at a predetermined facing interval. When mounting to the mounting pin 2, even if the facing distance differs to some extent, the difference can be absorbed and the protection bar 4 can be attached without difficulty.

  FIG. 7 shows a state in which the protective frame 4 for preventing the worker falling according to the present invention is attached between the building frames P and P of the frame scaffold F, and between the columns 1 and 1 of the building frames P and P. As shown in FIG. 8, the cross braces 3 and 3 attached adjacent to each other are mounting pins in which the flat mounting portions 3a1 and 3a1 of the pair of brace members 3a and 3a project from the support columns 1 and 1, respectively. 2 and 2, and one end of the arm lock 13 is engaged with the same mounting pin 2, and the rail body mounting piece 6 of the protection rail 4 for preventing the operator from falling is attached by the mounting hole 11. The same mounting pin 2 is engaged.

  These attachment members are regulated so as not to come out by the lock claw 16.

  9 and 10 show a state in which each of the mounting members 3, 13, and 4 can be mounted without difficulty within the effective mounting length Le (FIG. 11) of the mounting pin 2 protruding from the support column 1. FIG. Is.

To be more specific by numerical, a pair of brace members 3a of the cross brace 3, 3a of the flat mounting portion existing thickness of 3a1,3a1 are each 3.8 mm, 3.8 mm, the existing thickness of the arm lock 13 3 mm And the thickness in which the crosspiece main body attachment piece 6 of the both ends of the protection crosspiece 4 for a worker fall prevention is formed is 3.2 mm and 3.2 mm, respectively. Therefore, the total of these thicknesses is 17.00 mm, which is within the range of 18 mm which is the effective mounting length Le (FIG. 11) of the mounting pin 2, and these members are sufficiently attached to one mounting pin. 2 can be attached with a margin. Of course, if the arm lock 13 is not provided, it can be attached with a margin.

  As described above, according to the present invention, the crosspiece main body mounting pieces 6 that are separate from the both ends of the tubular crosspiece body 5 of the protective crosspiece 4 for preventing the operator from falling are simply fixed to the support post 1. Since it can be attached to the mounting pin 2 using the existing mounting pin 2, it does not require a special mounting bracket as in the prior art, so that it can be manufactured at such low cost. In addition, since the guard 4 for preventing the operator from falling can be spanned to a position that divides the gap C as much as possible, the degree of safety is improved accordingly. Furthermore, the crosspiece main body attachment piece 6 can be fixed to the tubular crosspiece body 5 at low cost easily and quickly by caulking, and at this time, flat tubes are provided at both ends of the tubular crosspiece body 5 as in this embodiment. This is very easy to manufacture, since it is only necessary to form a caulking stop 7 and form a concave notch 9 in the crosspiece main body attachment piece 6 and to caulk both of them.

F Frame scaffolding F1 Scaffolding plate P Building frame C Space Le Effective mounting length of mounting pin 1 Post 2 Mounting pin 3 Cross bracing 3a Bracing member 4 Protective bar for preventing operator fall 5 Tubular beam main body 6 Frame main body mounting piece 7 Flat cylindrical caulking stop portion 8 Plate-like caulking stop portion 9 Recessed notch portion 10 Recessed surface 11 Mounting hole 12 Plate-like mounting portion 13 Arm lock

Claims (3)

In a frame scaffolding comprising a column that forms a building frame and a cross brace that is engaged with a mounting pin projecting from the column and is spanned between the columns, a substantially triangular shape generated below the cross bar An operator fall prevention guard that is horizontally mounted so as to cross the gap so that an operator on the framework scaffold does not accidentally fall from the gap, and includes a tubular rail body that crosses the gap between the cross bars and the rail. It is composed of a crosspiece mounting piece fixed to both ends of the main body, and a flat cylindrical caulking stop portion is formed on both ends of the tubular crosspiece main body, and the flat cylindrical caulking stop portion is formed on the crosspiece body mounting piece. A plate-like caulking stop portion that can be fitted is formed, and the plate-like caulking stop portion of the crosspiece body mounting piece is fitted to the flat cylindrical caulking stop portions at both ends of the tubular crosspiece body With both of the above caulking stops, There was to be secured,
Further, a concave notch portion is formed in the plate-like caulking stop portion of the crosspiece body attachment piece, and the plate-like attachment portion of the crosspiece body attachment piece is formed in the flat cylindrical caulking stop portions at both ends of the tubular crosspiece body. When the caulking stoppers are fitted to both the caulking stoppers and the caulking stoppers are fitted, the caulking stoppers of the tubular bar body are caulked to the concave notches to form concave surfaces. And
In addition, a protective bar for preventing the operator from falling, the surface on the opposite side where the concave surface of the flat cylindrical caulking stopper is formed is a flat surface . A plate-like mounting portion is formed on the crosspiece main body mounting piece through which a mounting hole that can be engaged with the same mounting pin with which the cross bars are engaged, and both ends of the cross bars are already provided. In addition to the thickness of the mounting pin, the plate-like mounting portion is formed to have a thickness within the range of the effective mounting length of the mounting pin so as to be overlapped and mounted on the same mounting pin adjacent to the crossing bar. Item 2. A protection bar for preventing a worker from falling down. A plate-like shape that penetrates through the mounting holes that can be engaged and engaged with the same attachment pins that are overlapped with and engaged with the cross locks and the arm locks that are attached between the upper and lower support columns on the crosspiece mounting pieces. In addition to the existing thicknesses at both ends of the crossing bars and the existing thicknesses at both upper and lower ends of the arm lock, the plate-like mounting part includes the crossing bars and an arm lock that overlaps with the crossing bars. 2. The protection bar for preventing an operator from falling down according to claim 1, wherein the protective pin is formed to have a thickness within the range of an effective mounting length of the mounting pin so as to be further overlapped and mounted on the same mounting pin .

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