JP5275881B2 - Auxiliary handrail mounting bracket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary handrail fitting that can make a height from the top of a scaffolding board to a handrail 400 mm or less while allowing the use of a jamb, a crossing brace and an arm lock domestically used at present as they are without making any change. <P>SOLUTION: The auxiliary handrail fitting has a fitting body 9 formed of a front plate 6 and both right and left side plates 7, 7 into U-shape fitted to a post 1a of the jamb 1, and provided with a hanging plate 8 at the upper part of the front plate 6. The hanging plate 8 of the fitting body 9 is provided with a pinhole 10 for inserting through a crossing-brace-mounting-gravity-lock 25 provided at the post 1a. The front plate 6 is protrusively provided with an auxiliary-handrail-mounting-gravity-lock 11 inserted through a pinhole 12 provided in the end 4a of an auxiliary handrail 4. The fitting body 9 is fitted to the post 1a in a state of hanging the crossing-brace-mounting-gravity-lock 25 inserted through the pinhole 10 of the hanging plate 8. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an auxiliary handrail mounting bracket for attaching the auxiliary handrail when horizontally extending the bar-shaped auxiliary handrail between the struts under the crossing straddle between the support posts of the building frame of the framework scaffold. .

  In the frame scaffolding temporarily set up at the construction site, as shown in FIG. 9 (a), the X is composed of a pair of bracing members 2a and 2a between the building frames 1 and 1 along both longitudinal sides of the scaffolding plate 3. Since the cross-bar cross 2 of the shape is stretched, this cross-bar cross 2 becomes a safety fence, and the safety of the worker who crosses the scaffold board 3 can be aimed at. However, as shown in the figure, such a cross brace 2 is in a state where its lower side is opened in a substantially triangular shape with respect to the scaffold plate 3, so that the worker can There is a risk of falling over the triangular opening when the work is carried out at the same time. Therefore, in order to prevent such a danger, a bar-shaped auxiliary handrail 24 is bridged horizontally over the struts 2a, 2a forming the lower triangular opening of the cross brace 2. The building frame 1 is formed in a gate shape by a pair of columns 1a, 1a on both sides and a horizontal member 1b that connects both columns 1a, 1a. A scaffold plate 3 is bridged between 1b.

  The conventional auxiliary handrail 24 is described in, for example, Patent Document 1, but is composed of a single bar-shaped handrail main body as schematically shown in FIG. A first hook 21 that engages with the upper side surface portion of the bracing material 2a and a second hook that is positioned closer to the outer end than the first hook 21 and engages with the lower side surface portion of the bracing material 2a are provided at both ends. 22 and the hooks 21 and 22 can be fitted into the brace material 2a at the same time with the handrail body positioned parallel to the brace material 2a between the hooks 21 and 22 on one end side of the handrail body. An opening (not shown) is formed, and the second hook 22 on the other end side of the handrail body is pivotally supported by the handrail body so as to be rotatable and vertically movable, and is always upward by a spring. Is being energized.

  When the auxiliary handrail 24 is attached to the cross brace 2, the one end side of the handrail body in which the fitting opening is formed between the hooks 21 and 22 is positioned on the lower side of one brace material 2a. After the handrail main body is positioned in parallel and the first hook 21 and the second hook 22 on one end side are fitted into one brace material 2a, the handrail main body is leveled, and the handrail main body 9 is fitted into the other brace material 2a and the second hook 22 is fitted into the other brace material 2a, so that the auxiliary handrail 24 is shown in FIG. The mounting state is as shown in FIG.

JP-A-10-331413

  By the way, there has been a revision of safety standards based on the Industrial Safety and Health Act, and the height from the scaffolding plate of the framework scaffold to the auxiliary handrail has been limited to 400 mm or less from the conventional 500 mm or less. . A conventional auxiliary handrail 24 shown in FIG. 9 (b) is manufactured based on a safety standard having a height of 500 mm or less from the scaffold plate 3, and is attached as shown in the figure. The height Hb from the top surface is about 450 mm, which is higher than the new safety standard height Hs of 400 mm. Further, since the height h from the upper surface of the scaffolding plate 3 to the crossing bracing attachment gravity lock 25 which is the lower end fastening portion of the brace material 2a fastened to the column 1a of the building frame 1 is 329 mm, Even if both ends of the handrail 24 are attached as close as possible to the lower end side of the brace material 2a, 2a, in the mounting structure of the auxiliary handrail 24, the height from the upper surface of the scaffold plate 3 is set to a new safety standard height. The height Hs cannot be reduced to 400 mm or less.

  Therefore, it is conceivable that both ends of the auxiliary handrail having a length corresponding to the length between the columns 1a and 1a of the opposing building frames 1 and 1 are installed at the cross braces provided on the columns 1a and 1a, respectively. It is intended to be inserted into the gravity locks 25, 25 (inserted through the pin holes). However, as shown in FIG. 10 (a), the currently used general-purpose cross bracing gravity lock 25 has a pin 25a having an effective length Le of only 18 mm. If the ends of the brace members 2a, 2a are inserted one after another and the end of the arm lock 26 is further inserted, the end of the auxiliary handrail cannot be inserted. In FIG. 10 (a), w indicates the thickness of the welded portion of the base end portion of the pin 25a.

  As shown in FIG. 11, the arm lock 26 locks the connecting end portions when the lower end portion of the support column 1a of the upper building frame 1 is connected to the upper end portion of the support column 1a of the lower building frame 1. 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 support column 1a and the upper support column 1a. The connecting pin 30 penetrating the lower end portion is inserted, and the pin hole on the upper end portion side is connected to the crossing bracing attachment gravity lock 25 provided on the upper column 1a. The material 2a and the end of the 2a are overlapped and inserted.

  That is, a typical cross brace mounting gravity lock 25 that is currently used is one in which a pin 25a is disposed at right angles to the side surface of the support 1a and fixed by welding, as shown in FIG. A split groove 25c is provided on the tip end side of the pin 25a, and one end of the lock piece 25b is pivotally attached to the split groove 25c by a pivot 25d. Normally, as shown by the solid lines in FIGS. 10 (a) and 10 (b) When the end 2ao of the brace 2a of the cross brace 2 is inserted, the lock piece 25b is made to be in a horizontal posture as shown by phantom lines in the figure. In the case of using the same bracing material 2a of the cross brace 2 as the auxiliary handrail, the end thickness of each brace 2a is 5 mm, the end thickness of the arm lock 26 is 3 mm. The thickness of the end 4ao is 5mm. Therefore, as shown in FIG. 10 (b), on the pin 25a, the ends 2ao, 2ao of the brace material 2a, 2a of the cross brace 2, 2 on both sides, the end of the arm lock 26 and the auxiliary hand on both sides are provided. When the end portions 4ao and 4ao of the slides 4 and 4 are to be inserted, the thickness Wt of these end portions becomes 23 mm, which exceeds the effective length Le of the pin 25a by 18 mm. As can be seen from b), since the lock piece 25b cannot be rotated to the locked position, the auxiliary handrail 4 cannot be attached.

  In view of the circumstances as described above, the present invention can be used as it is without changing the building frame, crossing bars, and arm locks currently used in Japan. An object of the present invention is to provide an auxiliary handrail mounting bracket capable of reducing the height to the sliding to 400 mm or less.

  Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is bridged between the columns 1a and 1a of the building frames 1 and 1 of the frame scaffold. An auxiliary handrail mounting bracket 5A for attaching the auxiliary handrail 4 to the lower side of the cross bar 2 to horizontally attach the bar-shaped auxiliary handrail 4 between the support pillars 1a and 1a, and includes a front plate portion 6 and a rear plate. A metal plate formed by a side plate portion 27 connecting the portion 7 and the front and rear plate portions 6, 7 in a U-shaped frame shape that fits to the column 1 a, and a suspension plate portion 8 connected to the upper portion of the front plate portion 6. It has a main body 9, and a suspension plate portion 8 of the metal fitting main body 9 is provided with a pin hole 10 that is inserted into the cross brace mounting gravity lock 25 provided in the support column 1 a, and the front plate portion 6 has an auxiliary handrail 4. Gravity lock for attaching an auxiliary handrail for inserting the pin hole 12 of the end 4a 1 is projected, and the bracket body 9 is suspended from the longitudinal direction of the scaffolding plate 3 of the frame scaffolding with respect to the column 1a in a state where the pin hole 10 of the suspension plate 8 is inserted into the gravity lock 25 for crossing bracing and is suspended. It is characterized by being fitted.

  The invention according to claim 2 is used to horizontally extend the bar-shaped auxiliary handrail 4 between the support pillars 1a and 1a below the cross brace 2 that is extended between the support pillars 1a and 1a of the building frame 1 and 1 of the framework scaffold. An auxiliary handrail mounting bracket 5B for attaching the auxiliary handrail 4, which is fitted to the column 1a by a front plate portion 6, a rear plate portion 7, and a side plate portion 27 connecting the front and rear plate portions 6 and 7. The bracket body 9 is formed in a frame shape and has a suspension plate portion 8 connected to the upper portion of the front plate portion 6, and the suspension plate portion 8 of the bracket body 9 has an intersection provided on the column 1 a. A pin hole 10 is provided for insertion into the bracing attachment gravity lock 25, and an auxiliary handrail attachment gravity lock 11 is provided on the front plate portion 6 so as to project through the pin hole 12 of the end 4 a of the auxiliary handrail 4. The upper end portion of the suspension plate portion 8 and the lower end portion of the front plate portion 6 are arranged on the side surface of the column 1a. Legs 15 and 16 are provided to lift the suspension plate 8 and the front plate 6 from the front surface of the support 1a to the required height, and the cross bracing attachment gravity lock 25 is inserted in advance. The metal fitting body 9 is fitted to the column 1a from the longitudinal direction of the scaffold plate 3 in a state where the pin hole 10 of the suspension plate 8 is inserted and suspended.

  According to a third aspect of the present invention, in the auxiliary handrail mounting bracket according to the first or second aspect, a fixing leaf spring 13 for fixing the bracket main body 9 to the column 1a is attached to the bracket main body 9, and the fixing main spring 9 is fixed. The leaf spring 13 has a holding portion 13a that elastically holds the outer peripheral surface of the support 1a.

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. The auxiliary handrail mounting bracket 5A according to the first aspect is mounted on the gravity lock 25 for mounting the cross bar of the support 1a. It is adapted to be attached in a state of being suspended through the suspension plate portion 8 of the main body 9, and the end portions 4a, 4a of the auxiliary handrails 4, 4 are attached to the auxiliary handrail attachment gravity lock 11 of the mounting bracket 5B. By inserting the auxiliary handrail 4 horizontally between the adjacent support pillars 1a and 1a by being inserted through the pin holes 12 and 12, the auxiliary handrail 4 is connected to the lower end side of the support pillar 1a. Can be attached at a position lower than the crossing bracing gravity lock 25, and thereby the height Ha from the upper surface of the scaffolding plate 3 of the frame scaffold to the auxiliary handrail 4 should be 400 mm or less. It is possible.

  In addition, by using the auxiliary handrail mounting bracket 5A, the building frames, crossing bars, auxiliary handrails, and arm locks that are currently used in Japan can be used without modification. be able to. Further, the auxiliary handrail mounting bracket 5A can be attached in advance to the support 1a and the crossing bracing attachment gravity lock 25 before attaching the cross reinforcement 2 to the support 1a of the building frame 1.

  And according to this auxiliary handrail mounting bracket 5A, the U-shaped bracket-shaped bracket main body 9 is fitted to the column 1a from the longitudinal direction of the scaffolding plate of the frame scaffolding, and is attached to the column 1a. For example, the worker is likely to fall from the scaffolding plate 3 of the framework scaffold during the work, and the auxiliary handrail 4 is moved inwardly of the scaffolding (the longitudinal direction of the scaffolding plate with the tensile force of the safety rope connected to the worker). Even when pulled in an orthogonal inward direction), the metal fitting body 9 does not come off from the column 1a, and therefore the auxiliary handrail 4 does not come off, and the safety of the operator is ensured. By the way, if the U-shaped frame-shaped metal fitting body 9 is fitted in the direction perpendicular to the longitudinal direction of the scaffolding plate with respect to the support column 1a, particularly in the direction from the inside of the scaffolding plate to the outside, When the situation occurs, there is a risk that the metal fitting body 9 is detached from the support 1a.

  The auxiliary handrail mounting bracket 5B of the invention according to claim 2 is formed in a U-shaped frame shape with the front plate portion 6 and the left and right side plate portions 7 and 7, and a suspension plate portion 8 is provided on the upper portion of the front plate portion 6. A pin body 10 is provided in the suspension plate portion 8 of the metal fitting body 9 so as to be inserted into the gravity lock 25 for attaching the cross braces of the support 1a. The front plate portion 6 is provided with the auxiliary handrail 4 An auxiliary handrail mounting gravity lock 11 through which the pin hole 12 provided in the end portion 4a is inserted is projected, and the upper end portion of the suspension plate portion 8 and the lower end portion of the front plate portion 6 are supported on the side surface of the column 1a. The suspension plate 8 and the front plate 6 are provided with leg portions 15 and 16 for raising the required height from the side surface of the column 1a. The slide 4 is below the gravity lock 25 for crossing attachment on the lower end side of the column 1a. The height Ha from the upper surface of the scaffolding plate 3 of the framework scaffold to the auxiliary handrail 4 can be reduced to 400 mm or less, and by using this mounting bracket 5B, The building frame, crossing bars, auxiliary handrails, arm locks used can be used as they are without modification and change, and in particular, this mounting bracket 5B can be used after attaching the crossing bars 2 to the column 1a. It is a so-called retrofit type mounting bracket that is attached to the support pillar 1a and the cross brace mounting gravity lock 25, and can be easily attached to the cross brace mounting gravity lock 25 to which the cross brace 2 is already attached. The attachment work of the handrail 4 becomes easy.

  Also, this auxiliary handrail mounting bracket 5B is fitted to the column 1a from the longitudinal direction of the scaffolding plate of the frame scaffold with respect to the column 1a in the same manner as the auxiliary railing mounting bracket 5A of claim 1. For example, the worker is likely to fall from the scaffolding plate 3 of the framework scaffold during the work, and the auxiliary handrail 4 is scaffolded by the tensile force of the safety rope connected to the worker. Even if it is pulled in the inward direction (inward direction perpendicular to the longitudinal direction of the scaffolding plate), the metal fitting body 9 is not detached from the support column 1a, and the safety of the operator is ensured.

  According to the invention which concerns on Claim 3, since auxiliary | assistant handrail attachment metal fittings 5A and 5B can be fixed with respect to the support | pillar 1a, the attachment operation | work of the auxiliary handrail 4 becomes easy.

It is a front view of the frame scaffold which shows roughly the attachment state of the auxiliary handrail attachment metal fitting concerning the present invention. (a) is the enlarged front view which shows the attachment state of one Embodiment of an auxiliary handrail attachment metal fitting, (b) is the expansion side view. It is an expansion perspective view which shows the attachment state of the auxiliary handrail attachment metal fitting shown in FIG. (a) is a perspective view showing the auxiliary handrail mounting bracket, (b) is a front view, (c) is a side view, and (d) is a plan view. It is explanatory drawing which shows the attachment method of the auxiliary handrail attachment bracket with respect to a support | pillar. The other embodiment of the fixed leaf | plate spring provided in the metal fitting main body of an auxiliary handrail attachment metal fitting is shown, (a) is a front view of an attachment metal fitting, (b) is a side view, (c) is a top view. . It is an expansion perspective view which shows the attachment state of other embodiment of the auxiliary handrail attachment metal fitting which concerns on this invention. (a) is a perspective view of the auxiliary handrail mounting bracket shown in FIG. 7, (b) is a front view, (c) is a side view, and (d) is a plan view. (a) is a perspective view which shows the state which attached the auxiliary handrail to the crossing crossing of the conventional frame scaffold, (b) is a front view of the same state. (a) is a side view showing a gravity lock for cross brace attachment, and (b) is a case where the end of the brace material of the cross brace, the end of the arm lock, and the end of the auxiliary handrail are temporarily attached to the same gravity lock. It is explanatory drawing which shows an insertion state. It is explanatory drawing explaining the attachment state of an arm lock.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows a mounting state of an auxiliary handrail mounting bracket 5A (and an auxiliary handrail mounting bracket 5B described later) according to the present invention. ) Is a view of the mounting state of the auxiliary handrail mounting bracket 5A according to one embodiment of the present invention as viewed from the front side, (b) is an enlarged side view thereof, and FIG. 3 is an auxiliary handrail mounting bracket 5A of FIG. This is a perspective view showing the mounting state.

  As can be seen from FIGS. 4A to 4D, the auxiliary handrail mounting bracket 5A is formed by pressing a steel plate material, and connects the front plate portion 6, the rear plate portion 7, and the front and rear plate portions 6, 7. A metal fitting body 9 is formed in a planar U-shaped frame shape that is fitted to the column 1a of the building frame 1 with the side plate portion 27, and the suspension plate portion 8 is integrally connected to the upper portion of the front plate portion 6. Have. The metal fitting body 9 is provided with a pin hole 10 at the upper end portion of the suspension plate portion 8 to be inserted into the crossing attachment gravity lock 25 provided on the support column 1a of the building frame 1 that is widely used. The auxiliary handrail mounting gravity lock 11 for inserting the pin hole 12 provided in the end portion 4 a of the auxiliary handrail 4 is provided so as to protrude perpendicularly to the front surface of the front plate portion 6.

  The gravity lock 11 for attaching the auxiliary handrail is structurally and dimensionally similar to the gravity lock 25 for crossing attachment shown in FIG. 10, and the pin 11a is placed on the front surface of the front plate portion 6 as shown in FIG. It is arranged at a right angle and fixed by welding, and a split groove 11c is provided on the tip side of the pin 11a, and one end of the lock piece 11b is pivotally attached to the split groove 11c by a pivot 11d. As shown in (a) and (c), when the pin hole 12 provided in the end portion 4a of the auxiliary handrail 4 is inserted by its own weight and held in a posture perpendicular to the pin 11a, the lock piece 11b is horizontally held by hand. It is designed to rotate to a posture. Further, the pin 11a is fixed by inserting a base end portion thereof into a mounting hole 6a provided in the front plate portion 6 and welding. In addition, as shown by the phantom line in FIG. 4C, the gravity lock 25 for crossing attachment is provided with a spring (not shown) provided with a lock piece 25b that protrudes and protrudes from the tip side surface of the pin 25a. There is also a type that is attached in a state that always protrudes.

  The front plate portion 6, the rear plate portion 7, and the side plate portion 27 that form the metal fitting body 9 are provided with fixing leaf springs 13 for fixing the metal fitting main body 9 to the column 1 a of the building frame 1 on the inner peripheral side thereof. It is attached. As can be seen from FIG. 4 (d), the leaf spring 13 has a U-shape in plan view by a base plate portion 13o and a pair of curved holding portions 13a and 13a that elastically hold the outer peripheral surface of the support column 1a. The board portion 13o is attached to the inner side of the side plate portion 27 of the metal fitting body 9 by the rivet 14, and the curved holding portions 13a, 13a are the inner side surfaces of the front plate portion 6 and the rear plate portion 7, respectively. When the metal fitting body 9 is fitted to the column 1a, both curved holding portions 13a, 13a are elastically held on both front and rear side surfaces of the column 1a so that the metal fitting body 9 is attached to the column 1a. It is supposed to be fixed to.

  In order to attach the auxiliary handrail 4 to the support column 1a of the building frame 1 using the auxiliary handrail mounting device 5A configured as described above, this auxiliary handrail attachment device is attached before attaching the cross bar 2 to the support column 1a. 5A is attached to the column 1a. That is, as shown in FIG. 5, the pin hole 10 provided in the suspension plate portion 8 of the metal fitting body 9 is inserted into the gravity lock 25 for attaching the crossing bar at the lower end side of the column 1 a, and the metal fitting body 9 is shown by the solid line in FIG. As shown in Fig. 5, the U-shaped frame-shaped portion composed of the front plate portion 6 and the side plate portion 27 of the metal fitting body 9 is turned in the same manner by turning the metal fitting main body 9 downward about the gravity lock 25 from the horizontal position. As shown by the phantom line in the figure, the support 1a is fitted to the support 1a from the side (from the longitudinal direction of the scaffold 3 of the frame scaffold) and is fixed to the support 1a by the fixing plate spring 13. When removing the metal fitting body 9 from the column 1a, the metal fitting body 9 may be turned upward from the state shown in the phantom line, and the suspension plate portion 8 may be pulled out from the gravity lock 25.

  Thereafter, the end portions 2ao and 2ao of the cross bracing members 2a and 2a of the two cross braces 2 and 2 are inserted through the respective pin holes 20 into the cross bracing attachment gravity locks 25 on the upper and lower end portions of the column 1a, Further, a pin hole (not shown) at the upper end of the arm lock 26 is inserted into the gravity lock 25 for crossing attachment at the lower end side so as to be in a state as shown in FIGS. By inserting the end portions 4a and 4a of the auxiliary handrails 4 and 4 through the respective pin holes 12 to the gravity lock 11 for attaching the auxiliary handrail of the metal fitting 5A, the auxiliary handrail 4 is placed adjacent to the support column 1a. , 1a are horizontally bridged as shown in FIGS. 1 and 2 (a) and (b). In this case, the auxiliary handrail mounting gravity lock 11 is structurally and dimensionally similar to the conventional cross brace mounting gravity lock 25, so that both can be seen from FIG. 2 (b). The end portions 4a and 4a of the auxiliary handrails 4 and 4 can be inserted with a sufficient margin. In FIG. 3, the mounting state of the arm lock 26 is not shown.

  As described above, the auxiliary handrail mounting bracket 5A is attached to the gravity lock 25 for mounting at the lower crossing side of the column 1a while being suspended via the suspension plate portion 8 of the bracket main body 9. By inserting the end portions 4a and 4a of the auxiliary handrails 4 and 4 through the pin holes 12 and 12 into the gravity lock 11 for attaching the auxiliary handrail of the mounting bracket 5A, the auxiliary handrail 4 is adjacent to the support column 1a. , 1a, the auxiliary handrail 4 can be attached at a position lower than the cross brace mounting gravity lock 25 on the lower end side of the support pillar 1a, and thereby the frame scaffold The height Ha from the upper surface of the scaffold plate 3 to the auxiliary handrail 4 can be 400 mm or less.

  That is, in this case, as can be seen from FIG. 1, the height h from the upper surface of the scaffold plate 3 to the gravity lock 25 for attaching the brace of the brace 2 a of the brace 2 of the brace 2 is fixed to the lower brace of the brace 1 a. Is 329 mm, the height Ha of the auxiliary handrail 4 from the top surface of the scaffolding plate 3 is, for example, about 270 to 280 mm lower than the height h of the gravity lock 25 by about 270 to 280 mm, and is less than 400 mm. The new safety standard height Hs based on the law can be met. Further, by using the auxiliary handrail mounting bracket 5A, it is possible to use these as they are without modifying or changing the building frame, crossing bars, auxiliary handrails, and arm locks currently used in Japan. be able to.

  The auxiliary handrail mounting bracket 5A is configured to fit the U-shaped frame-shaped bracket main body 9 to the support column 1a from the left or right side thereof, that is, from the direction along the longitudinal direction of the scaffolding plate of the frame scaffold. Since the metal fitting body 9 is fitted and attached to the column 1a, for example, the operator is likely to fall from the scaffolding plate 3 of the frame scaffold during the work, and the tension of the safety rope connected to the worker Even if the auxiliary handrail 4 is pulled by the force in the inward direction of the scaffold (inward direction perpendicular to the longitudinal direction of the scaffold plate), the metal fitting body 9 does not come off from the column 1a. 4 does not come off and the safety of the worker is ensured. By the way, if the U-shaped frame-shaped metal fitting body 9 is fitted in the direction perpendicular to the longitudinal direction of the scaffolding plate with respect to the support column 1a, particularly in the direction from the inside of the scaffolding plate to the outside, When a situation occurs, there is a risk that the metal fitting body 9 is detached from the support column 1a, and thereby the auxiliary handrail is removed.

  FIG. 6 shows another embodiment of the fixing leaf spring 13 provided on the metal fitting body 9 of the auxiliary handrail attachment metal fitting 5A, (a) is a front view of the attachment metal fitting 5A, (b) is a side view, and (c). FIG. 4 is a plan view, and in this embodiment, is composed of two fixed leaf springs 13, 13, one of which is a rivet with its base end on the outer surface of the front plate 6. 14, a curved holding portion 13 a formed on the front end side is inserted into the front plate portion 6 from the window portion 6 a provided on the front plate portion 6, and the other spring 13 has a base end portion thereof. Attached to the outer side surface portion of the rear plate portion 7 with a rivet 14, a curved holding portion 13 a formed on the front end side is projected into the inner side of the rear plate portion 7 from a window portion 7 a provided on the rear plate portion 7. When the support 1a is fitted, the curved holding parts 13a, 13a on both sides elastically hold the both sides of the support 1a. To fix the bracket body 9.

  The auxiliary handrail mounting bracket 5A described with reference to FIGS. 3 to 6 is attached to the support column 1a in advance via the cross reinforcement mounting gravity lock 25 before attaching the cross reinforcement 2 to the support column 1a of the building frame 1. This is a so-called tip-mounted mounting bracket.

  7 and 8 show a so-called retrofitting type in which the cross brace 2 is attached to the cross brace mounting gravity lock 25 of the post 1a and then attached to the post 1a via the cross brace attaching gravity lock 25. The auxiliary handrail mounting bracket 5B is shown.

  The auxiliary handrail mounting bracket 5B has almost the same structure as the auxiliary handrail mounting bracket 5A, and as shown in FIGS. 8 (a) to (d), the front plate portion 6, the rear plate portion 7, and the like. The side plate portion 27 that connects the front and rear plate portions 6 and 7 is formed in a U-shaped frame shape that fits to the column 1 a of the building frame 1, and the suspension plate portion 8 is integrally connected to the upper portion of the front plate portion 6. The metal fitting body 9 is provided with a pin hole 10 at the center of the suspension plate portion 8 that is inserted into a cross lock mounting gravity lock 25 provided on the column 1a of the building frame 1. The front plate portion 6 is provided with an auxiliary handrail mounting gravity lock 11 through which the pin hole 12 provided in the end portion 4a of the auxiliary handrail 4 is inserted and protrudes perpendicularly to the front surface of the front plate portion 6. The upper end portion of the suspension plate portion 8 and the lower end portion of the front plate portion 6 are supported by the front surface of the support column 1a and the suspension plate portion 8 and the front portion. The parts 6 legs 15, 16 for float desired height from the front surface of the column 1a is perpendicularly protruded inward is provided.

  As shown in FIG. 8 (c), the floating height n of the suspension plate portion 8 and the front plate portion 6 from the side surface of the support column 1a in a state where the legs 15 and 16 are supported on the front surface of the support column 1a intersects each other. When the end thickness of the brace material 2a of the cross brace 2 to be inserted into the brace mounting gravity lock 25 is slightly larger than twice the thickness of the brace material 2a, and the end portion thickness of the brace material 2a is 5 mm, it is about 12 mm. The auxiliary handrail attaching gravity lock 11 protruding from the front plate portion 6 of the metal fitting body 9 is the same as the auxiliary handrail attaching metal fitting 5A.

  Further, as can be seen from FIG. 8 (d), a fixing leaf spring 13 for fixing the metal fitting body 9 to the column 1 a of the building frame 1 is attached to the inside of the metal fitting body 9. The plate spring 13 is formed in a substantially U shape in plan view, and the base plate portion 13o is attached to the inner side surface of the front plate portion 6 with a rivet 14, and a pair of curved holding portions 13a, 13a on both sides are attached to the support column 1a. The metal fitting body 9 is fixed to the support column 1a by elastically holding the outer peripheral surface portion.

  The auxiliary handrail mounting bracket 5B configured as described above is used by attaching the cross brace 2 to the column 1a of the building frame 1 and then attaching it to the column 1a. That is, as shown in FIG. 9, the pin provided on the hanging plate portion 8 of the metal fitting body 9 is attached to the lower end side cross bracing attachment gravity lock 25 of the support 1 a to which the bracing members 2 a and 2 a of the cross bracing 2 are attached. The U-shaped frame portion composed of the front plate portion 6, the rear plate portion 7, and the side plate portion 27 of the metal fitting body 9 is inserted into the frame scaffold in a state in which the hole 10 is inserted and the attachment metal fitting 5B is inclined obliquely when viewed from the front. The scaffolding plate 3 is fitted to the column 1a from the longitudinal direction and fixed to the column 1a by the fixing plate spring 13.

  Although not shown in FIG. 7, a pin hole (not shown) at the upper end of the arm lock 26 is provided on the distal end side of the cross lock mounting gravity lock 25 protruding from the pin hole 10 of the suspension plate 8. As shown in FIG. 9, the pin hole at the lower end portion of the arm lock 26 is inserted into the connecting pin 30 that penetrates the upper end portion of the lower-stage column 1a and the lower end portion of the upper-column column 1a.

  Thereafter, the auxiliary handrail mounting gravity lock 11 of the auxiliary handrail mounting bracket 5B is inserted into the end portions 4a and 4a of the auxiliary handrails 4 and 4 through the respective pin holes 12, as shown in FIG. By doing so, the auxiliary handrail 4 is horizontally bridged between the adjacent columns 1a and 1a, and the state shown in FIG. 1 is obtained as in the case of the auxiliary handrail mounting bracket 5A.

DESCRIPTION OF SYMBOLS 1 Building frame 1a Strut 2 Crossing brace 2a Bracing material 3 Scaffold plate 4 Auxiliary handrail 5A, 5B Auxiliary handrail attachment metal fitting 6 Front plate part of metal fitting body 7 Rear plate part of metal fitting body 8 Suspension plate part 9 of metal fitting body DESCRIPTION OF SYMBOLS 10 Pin hole 11 of suspension board part Gravity lock 13 for attaching auxiliary handrail 13 Leaf spring 20 for fixation
25 Gravity lock for fitting crossed bars 27 Side plate of metal fittings

Claims (3)

  Auxiliary handrail mounting bracket for attaching the auxiliary handrail to the horizontal position between the support pillars in the horizontal direction below the crossing bars crossed between the pillars of the building frame of the frame scaffold, And a metal plate body formed by connecting a suspension plate portion to the upper portion of the front plate portion. The suspension plate portion of the metal fitting body is provided with a pin hole that is inserted into the cross lock mounting gravity lock provided on the support column, and the front plate portion is inserted with the pin hole at the end of the auxiliary handrail. A mounting gravity lock is projected, and the bracket body is fitted to the column from the longitudinal direction of the scaffolding plate of the frame scaffolding with the pin hole of the suspension plate crossing the brace and inserted through the mounting gravity lock and suspended. Auxiliary handrail mounting bracket.   Auxiliary handrail mounting bracket for attaching the auxiliary handrail to the horizontal position between the support pillars in the horizontal direction below the crossing bars crossed between the pillars of the building frame of the frame scaffold, And a metal plate body formed by connecting a suspension plate portion to the upper portion of the front plate portion. The suspension plate portion of the bracket body is provided with a pin hole through which the gravity lock for crossing attachment provided in the column is inserted, and the auxiliary plate is inserted into the front plate portion through the pin hole at the end of the auxiliary handrail. In addition to projecting a gravity lock for mounting, the upper end of the suspension plate and the lower end of the front plate are supported by the front of the column to lift the suspension plate and front plate from the front of the column to the required height. Crossed muscles with legs that are pre-inserted at the ends of crossed muscles Auxiliary handrail mounting bracket which is adapted to fit the fitting body from the scaffolding plate longitudinal framework scaffold to post in a state of suspended is passed through the pin hole of the hanging plate portion Gravity locking attachment are.   The fixing metal spring for fixing the metal fitting main body to the column is attached to the metal fitting main body, and the fixing plate spring has a curved portion that elastically holds the outer peripheral surface of the column. Auxiliary handrail mounting bracket as described.

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