JP6628623B2 - Storage and holding device for safety handrail for scaffold - Google Patents

Description

The present invention relates to an apparatus for holding a safety handrail when not in use in a stowed posture when a temporary scaffold is constructed at a construction site or the like, with respect to a safety handrail mounted in a stowed posture from a stowed posture. About.

Conventionally, regarding construction of a temporary scaffold at a construction site or the like, a handrail leading method has been recommended for worker safety. In the case of a wedge-tied temporary scaffold, the column has flanges having wedge holes arranged vertically, and the preceding handrail has a horizontal member and a pair of diagonal members. By pivotally connecting the ends by pivoting means and rotating the diagonal member, the storage posture in which the ends of the pair of diagonal members are aligned with both ends of the horizontal member, and the diagonal member Are arranged so as to allow the deployed posture to cross each other below the horizontal member.

Therefore, when attaching the leading handrail to the scaffolding structure, the horizontal member is arranged between a pair of adjacent pillars of the scaffolding structure, and the diagonal member is set in the unfolded posture. It is used by locking a locking mechanism provided at the base end to one of the columns, and fixing a fixing mechanism provided at the distal end of the diagonal member to the other column.

On the other hand, when the leading handrail is not used, the storage and transportation without bulkiness and compactness are enabled in the state where the diagonal member is in the storage position.

However, in the state where the diagonal member is in the retracted posture, the diagonal member is rotatable around both ends of the horizontal member with the pivot means as a fulcrum, and is not fixed and held. . That is, when transporting the leading handrail in the storage position, the operator needs to hold the horizontal material and the diagonal material that have been superimposed on each other with the fingers or the like in a bundled state. There is a problem that the material rotates and hangs down.

For this reason, the present applicant has proposed a fixing tool for fixing and holding a diagonal member in a stored posture to a horizontal member according to Patent Literature 1 and Patent Literature 2 (hereinafter, collectively referred to as “prior art”). However, the fixing device of the prior art has a configuration in which the fixing device is attached in advance to the center of the horizontal member, and the oblique members in the retracted posture are fitted into fixing portions having a C-shaped cross section provided on both sides of the fixing device. Therefore, there are various problems to be improved.

Japanese Patent No. 4134121 (Japanese Patent Application Laid-Open No. 2007-63897) Japanese Patent No. 4435077 (Japanese Patent Application Laid-Open No. 2007-146587)

The prior art fixture is fixed to the center of the horizontal member in the use state in which the preceding handrail is attached to the scaffold construction, and forms a protrusion on the surface of the central portion of the horizontal member used as the handrail. Is not preferred.

Generally, an operator who comes and goes on a work floor on a high altitude scaffold slidably locks a hook with a safety belt extending from the body to a horizontal member of a preceding handrail and slides the foot. This ensures safety when falling from the work floor. However, when the fixing tool protrudes from the center of the horizontal member as in the related art, the sliding of the hooked locking tool is hindered, which not only has a problem of lowering the work efficiency, but also causes one-touch disengagement. When the opening / closing mechanism of the hook-equipped locking fitting collides with the fixing tool, there is a possibility that the hook-fitting fitting is detached from the horizontal member.

In addition, the prior art fixture is configured to hold the center of the diagonal material at the center of the horizontal material, and the distal end of the diagonal material (the free end opposite the pivoted base end). ), The diagonal material may easily fall off the fixture when subjected to an external force, such as when the tip of the diagonal material collides with a foreign object during transportation or the like.

The present invention provides a storage and holding device for a scaffolding safety handrail which solves the above-mentioned problems, and includes a horizontal member and a pair of diagonal members. By pivotally connecting the base ends of the members by pivoting means and rotating the diagonal members, the storage posture in which the distal ends of the pair of diagonal members are adjacent to both ends of the horizontal member, In the scaffolding safety handrail configured to enable the deployed posture in which the diagonal members cross each other below the horizontal member, the both ends of the horizontal member facing and adjacent to each other in the stowed state are set. With respect to the mutual ends of the diagonal members, one of the holding devices constitutes an attached portion and the other constitutes a locked portion, and the holding portion detachably locks and holds the locked portion to the attached portion. The holding device is attached to the attachment portion, and the attachment portion is attached to the attachment portion. Lies in comprising integrally formed with a spring clip for holding detachably the stop portion.

In the embodiment according to an example of the present invention, in the storage posture, the attachment portions are formed at both ends of the horizontal member with respect to the both ends of the horizontal member and the tip of the diagonal member which are opposed to each other and are adjacent to each other. The horizontal member is connected to a bracket fixed to both ends of the diagonal member so that the base end of the diagonal member is rotatably connected to a bracket by a pivot. The mounting portion of the holding device includes a flat plate portion that is fixed in a state of being superimposed on the bracket by inserting the pivot, and the flat portion and the bracket are mutually A detent means for non-rotatably locking the mounting portion around the pivot is provided.

Further, the embodiment according to another example of the present invention is characterized in that, with respect to each other between the both ends of the horizontal member and the tip of the diagonal member which are opposed to each other in the storage posture, a circular tube portion at the tip of the diagonal member And the locking portion is formed by both ends of the horizontal member, and the mounting portion of the holding device is fixed in a state of holding the circular tube portion forming the mounting portion. And a detent means for interlocking the mounting portion so as not to rotate around the axis of the circular tube portion is provided between the bent portion and the attached portion.

Furthermore, the storage and holding device for a scaffolding safety handrail provided by the present invention includes a horizontal member and a pair of diagonal members, and a base fixed to both ends of the horizontal member pivots a base end of the diagonal member by a pivot. By freely pivoting and rotating the diagonal members, the storage position in which the tips of the pair of diagonal members are adjacent to the bracket, and the unfolding of the diagonal members crossing each other below the horizontal member. In the safety handrail for scaffolding configured to be capable of posture, an attached portion is formed on the bracket, and a locked portion is formed at a tip end of a diagonal member adjacent to the bracket in the retracted posture in the storage posture. A holding device for detachably locking and holding the locked portion is provided on the bracket mounting portion. The holding device is formed by bending one metal plate, and the holding device is formed through the pivot. The attachment part attached to the attachment part, and the locked part It is formed integrally with the spring clip comprising a clamping piece embracing in.

In a preferred embodiment of the present invention, the spring clip forms a groove for holding the peripheral surface of the locked portion having an outer diameter D by the holding piece, and the holding piece has an opening of the groove. The opening width W of the groove is formed so as to satisfy W <D, and is elastically deformable in a direction of expanding the opening width, and a guide edge extending outward from the opening edge of the groove is provided.

The spring clip forms a groove for holding the peripheral surface of the locked portion having an outer diameter D by the holding piece, and a receiving portion for abutting the locked portion held by the groove. Is formed at the bottom of the groove, and the holding piece is formed such that the length H from the receiving part to the tip of the holding piece is H <D with respect to the outer diameter D of the locked part. It is preferable that a part of the peripheral surface of the locked part held by the groove forms a protection part protruding from the tip of the holding piece.

At this time, the spring clip is formed by bending the holding pieces on both sides of a mounting portion through which a pivot is inserted in a state where the spring clips are overlapped on the mounting portion of the bracket, and the holding clips are opened in the lateral direction of the bracket. It is preferable that a groove is formed, and the head of the pivot be located at the bottom of the groove, and the head form the receiving portion.

In a further preferred embodiment, the pivot comprises a mounting portion of the spring clip having a thickness of T3, a bracket of the horizontal member having a thickness of T2, and a bracket having a thickness of T2 from a head located at the bottom of the groove. A shank portion to be inserted into the base end portion of the diagonal member T1 is extended, and a nut is screwed to a bolt portion extended from the shank portion, and the axial length L of the shank portion is set to L. > T3 + T2 + T1, so that clearances are formed on both sides of the base end of the diagonal member.

According to the present invention, when the safety handrail 3 is transported / stored or the like when not in use, the diagonal members 5, 5 are rotated via the pivoting means 7, and the horizontal members 4 and the diagonal members 5, 5 are used. What is necessary is just to hold the other to-be-latched part 17 by the spring clip 21 of the holding device 18 provided in one to-be-attached part 16. As a result, the safety handrail 4 is locked and held by the holding means 18 in a state where the diagonal members 5 and 5 are in the storage posture P2, and the diagonal members 5 and 5 do not hang down. Handling becomes easy. At this time, since the operation of locking and holding the diagonal members 5, 5 is performed by a substantially one-touch operation of rotating the diagonal members 5, 5 toward the storage posture P2, the operation can be performed quickly and easily.

The holding devices 18, 18 hold the tips 5b, 5b of the diagonal members 5, 5 and the both ends 4a, 4a of the horizontal member 4 in the storage posture P2. There is an advantage that even when the portion 5b receives an external force such as a collision with a foreign matter, there is a low possibility that the locked portion 17 falls off from the holding means 18.

Furthermore, when the safety handrail 3 is mounted on a scaffold with the inclined members 5, 5 in the deployed posture P1, the central region between both ends 4a, 4a of the horizontal member 4 functioning as a handrail is provided as in the prior art. Since there is no such protrusion, the sliding of the hook-type locking member 15 for protecting the worker's body is not hindered, which leads to a decrease in work efficiency and a danger due to the accidental detachment of the hooked metal member 15. It is not.

According to the present invention as set forth in claims 2 and 4 to 8, known safety handrails in which brackets 6, 6 are fixed to both ends of the horizontal member 4 to pivotally connect the diagonal members 5, 5 are provided. In 3, by using the bracket 6 as the attachment portion 16, the holding device 18 can be easily retrofitted, and a versatile storage and holding device can be provided.

According to the third aspect of the present invention, in the known safety handrail 3, by using the circular pipe portions of the tip portions 5 b, 5 b of the diagonal members 5, 5 as the attachment portions 16, the holding device 18 can be easily provided. Can be added later, and a versatile storage and holding device can be provided.

FIG. 2 is a front view showing a preceding handrail as an example of a safety handrail, and showing a state in which the preceding handrail is attached to a scaffold construction. It is a front view explaining the deployment attitude | position and storage attitude of a safety handrail. FIG. 4A shows a locking mechanism provided at a base end of the safety handrail, and FIG. 4A is a front view partially showing a state immediately before locking the locking mechanism to a flange of a column, and FIG. FIG. 3C is a front view showing the locked state as a partial cross section, and FIG. 3C is a perspective view showing the locked state. 1A and 1B show a storage holding device according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view showing an exploded state of the storage holding device and a safety handrail, and FIG. 1B is a perspective view of the storage holding device. FIG. 2 is a perspective view showing an assembled state of the storage holding device and the safety handrail according to the first embodiment of the present invention. FIG. 4 is a front view showing a state in which the safety handrail is being stored with respect to the operation of the storage holding device according to the first embodiment of the present invention. FIG. 3A is a front view showing a state in which the safety handrail in the storage posture is held by the storage holding device of the first embodiment, wherein FIG. 5A is a front view showing an enlarged main part, and FIG. is there. FIG. 3A is a plan view showing a state in which the safety handrail in the storage posture is held by the storage holding device of the first embodiment, wherein FIG. 2A is a plan view showing an enlarged main part, and FIG. is there. FIG. 11 is a perspective view showing a first modification of the rotation preventing means provided on the mounting portion of the storage and holding device according to the first embodiment of the present invention. FIG. 13 is a perspective view showing a second modification of the rotation preventing means provided in the mounting portion of the storage and holding device according to the first embodiment of the present invention. It is a perspective view showing the storage holding device concerning a 2nd embodiment of the present invention. It is a front view showing the state where the safety handrail in the storage posture was held by the storage and holding device of the second embodiment. It is a top view showing the state where the safety handrail in the storage posture was held by the storage holding device of the second embodiment. 9A and 9B show a modification of the storage and holding device according to the second embodiment of the present invention, wherein FIG. 9A is a perspective view showing a state in which the safety handrail is being stored, and FIG. 9B is a perspective view of the storage and holding device. 9A and 9B show a storage holding device according to a third embodiment of the present invention, wherein FIG. 9A is a perspective view showing an exploded state of the storage holding device and a safety handrail, and FIG. 9B is a perspective view of the storage holding device. It is a perspective view showing the storage holding device concerning a 3rd embodiment of the present invention, and an assembly state of a safety handrail. FIGS. 9A and 9B show the operation of the storage holding device according to the third embodiment of the present invention, wherein FIGS. 9A and 9B are a plan view and a front view showing a state before the safety handrail is stored, and FIGS. 3A and 3B are a plan view and a front view showing a state after storage. It is the whole figure which showed the state which hold | maintained the safety handrail in the storage attitude | position by the storage holding device of 3rd Embodiment from the front. In the storage holding device according to the third embodiment, (A) is a cross-sectional view illustrating a main part, and (B) is an enlarged cross-sectional view along XX. In the storage holding device according to the third embodiment, (A) is a cross-sectional view showing a state in which a locked portion of a diagonal material is being fitted into a groove of a clip, and (B) is a cross-sectional view showing a state after being fitted. . Regarding the design of the storage holding device according to the third embodiment, the essential parts are indicated by solid lines and the non-essential parts are indicated by broken lines, (A) is a front view, (B) is a rear view, and (C) is a right side view. , (D) is a left side view, (E) is a plan view, and (F) is a bottom view.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiment, a preceding handrail is shown as an example of the safety handrail, but it is a matter of course that the present invention is not limited to the preceding handrail.

(Composition of safety handrail)
FIG. 1 shows a temporary scaffold of a wedge tie type as an example of a scaffold construction, and each pillar 1 has flanges 2 fixedly provided at predetermined intervals above and below. As shown in the figure, these pillars 1 are erected at predetermined intervals in a direction along the outer wall of a building or the like (hereinafter, referred to as a “girder direction”), and although not shown, the pillars 1 Similar struts 1 are erected in the perspective direction (hereinafter referred to as "wife direction"), and a work floor is installed between the struts 1 corresponding to the wife direction via a cloth material or a cloth frame.

When the preceding handrail construction method is performed using the safety handrails 3, work floors are installed in the lower layer and the upper layer, and the safety handrails 3 that block the space on the girder side within a predetermined height range from each work floor are attached. Before installing the upper handrail, the safety handrail 3 is installed by the worker on the lower worker floor before the upper handrail, and then the upper worker floor is installed. By repeating from the lower layer to the upper layer, a preceding handrail attached to the girder side of the work floor of each layer is configured.

The safety handrail 3 includes a horizontal member 4 made of a metal pipe and a pair of diagonal members 5 made of a metal pipe. The horizontal member 4 includes both end portions 4a, 4a including downward brackets 6, 6 made of a metal plate fixed to both ends, and the brackets 6, 6 have base ends of the oblique members 5, 5, respectively. The portions 5a are rotatably connected to each other by a pivoting means 7 including a pivot 7a and a nut 7b each composed of a bolt. Accordingly, the safety handrail 3 is developed by rotating the diagonal members 5, 5 so that the pair of diagonal members 5, 5 cross each other below the horizontal member 4 as shown by a chain line in FIG. 2. As shown by the solid line in FIG. 2, the posture P <b> 1 is rotated upward by the tip 5 b of the pair of diagonal members 5, and the diagonal members 5, 5 are brought close to both ends 4 a, 4 a of the horizontal member 4. The storage posture P2 is made possible. In the present invention, it is to be understood that the “ends 4a, 4a” of the horizontal member 4 are not strictly limited to the ends of the horizontal member, but include a predetermined length region extending from the end. I want to be. Similarly, it should be understood that the “base end 5a” and the “tip end 5b” of the diagonal member 5 also include a predetermined length region extending from each end.

When attaching the safety handrail 3 to the scaffolding structure, as shown in FIG. 1, the horizontal member 5 is arranged between a pair of columns 1, 1 adjacent to the scaffolding structure, and the diagonal members 5, 5 are deployed. In the posture P1, the locking mechanism 8 provided at the base end 6a of the diagonal member 5 is locked to the flange 2 of one of the columns 1, and the fixing mechanism 9 provided at the distal end 5b of the diagonal member 5. Is fixed to the flange 2 of the other column 1.

In the case of the illustrated embodiment, as shown in FIG. 3, the locking mechanism 8 includes a metal plate locking body 10 fixed to the base end 5 a of the diagonal member 5 by welding or the like, and a downward locking pin 11. The locking body 10 is pivotally connected to the bracket 6 via a connecting means 7 with the area including the locking body 10 as the base end 5a of the diagonal member 5. . Therefore, by rotating the diagonal member 5 from the storage posture P2 toward the deployment posture P1, the locking pin 11 is caused to enter the wedge hole 2a from above the flange 2 and lock while being in the vertical posture. It is configured.

As shown in FIGS. 7 and 11, the fixing mechanism 9 forms a wedge-type tightening mechanism, and includes a substantially U-shaped holding member 12 fixed to the tip 5 b of the diagonal member 5 in a side view. A vertically movable wedge piece 13 penetrating the holding member 12 in the vertical direction. The wedge piece 13 is pressed into the wedge hole 2a with the holding member 12 sandwiching the flange 2 from above and below. , So as to be tightly connected to the flange 2.

However, the present invention does not aim at the configuration relating to the locking mechanism 8 and the fixing mechanism 9. In short, the locking mechanism 8 is provided at the base end 5 a of the diagonal member 5, and the fixing mechanism is provided at the distal end 5 b. 9 may be provided, and its specific configuration is not limited.

As shown in FIG. 1, on a scaffold equipped with the safety handrail 3, an operator who works at a high place wears a safety belt provided with a hook 15 with a hook 15 at the tip of a master rope 14 extending from a waist belt or the like. The safety is ensured by slidably locking the locking member 15 to the horizontal member 4 of the safety handrail 3.

(First Embodiment of Storage and Holding Device)
4 to 8 show a first embodiment of the storage and holding device according to the present invention. In this case, as shown in FIGS. 6 and 7, the safety handrail 3 is in a storage posture P2 in a relative position. With respect to both ends 4a and 4a of the horizontal member 4 adjacent to the front and end portions 5b and 5b of the diagonal members 5 and 5, end portions 4a and 4a of the horizontal member 4 are formed with adherends 16, The locked portions 17 are formed at the distal end portions 5b and 5b of the fifth and fifth portions. By attaching the holding device 18 to the attached portion 16, the locked portion 17 is attached and detached by the holding device 18. It is configured to freely lock and hold.

As shown in FIG. 4 and FIG. 5, the holding device 18 attaches the downward bracket 6 made of a metal plate fixed to both ends 4 a, 4 a of the horizontal member 4 as the attached portion 16 to the attached portion 16. An attachment portion 19 to be attached, a support portion 20 extending downward from the attachment portion 19, and a C-shaped spring clip 21 that is curved toward the side from the support portion 20 and opens downward. And is bent by one metal plate.

As shown in FIG. 4 (B), the mounting portion 19 has a through-hole 22 at a substantially central portion of the flat plate portion 19a, and has folded walls 23, 23 by folding both side edges into a substantially U-shape. Is formed so that the pivot 7a (bolt) and the nut 7b constituting the pivoting means 7 can be attached to the bracket 6 in a separated state. That is, both edges of the bracket 6 are inserted into the grooves 23a, 23a formed by the bent walls 23, 23 of the mounting portion 19, and the through holes 22 are aligned with the pivot holes of the bracket 6, and By screwing the nut 7b to the pivot 7a (bolt) inserted into the through hole 22, the locking member 10 of the diagonal member 5 is provided on one of the front and back surfaces of the bracket 6, as shown in FIG. It is pivotally connected, and the holding device 18 is attached to the other surface in the state of being fastened together by the nut 7b.

Therefore, in the known safety handrail 3 having the above-described locking mechanism 9 of the wedge binding type, the holding device 18 can be easily retrofitted by using the bracket 6 as the attachment portion 16. Yes, a versatile storage and holding device can be provided.

At this time, the mounting portion 19 of the holding device 18 forms the rotation stopping means 24 by locking the bent walls 23, 23 on both side edges of the bracket 6, whereby the mounting portion 19 is connected to the pivot 7a. The spring clip 21 is positioned so as to always open in a predetermined downward direction, and is held in a posture.

The rotation preventing means 24 may be constituted by a pair of bent walls 23, 23 as shown in the figure, or may be constituted by only one bent wall 23, and furthermore, as shown in the figure, May be formed by folding back into a U-shape, or may be formed by an L-shaped bent piece that can abut the side edge of the bracket 6.

The spring clip 21 includes a pair of holding pieces 51, 51 forming a groove 50 for holding the peripheral surface of the locked portion 17 having the outer diameter D <b> 1 (see FIG. 6) of the diagonal member 5. As shown in FIG. 4B, the holding pieces 51, 51 are formed such that the opening width W1 of the downward opening of the groove 50 is set to W1 <D1, and is elastic in the direction in which the opening width is expanded. It is preferable to form a guide edge 52 which is deformable and is bent so as to expand outward from the opening edge.

6 to 8 show the operation of the holding device 18 when the posture of the diagonal members 5, 5 of the safety handrail 3 is changed from the deployed posture P1 to the stored posture P2.

As shown in a plan view in FIG. 8, the safety handrail 3 has a bracket 6L at the left end of the front and back surfaces of the brackets 6 at both left and right ends of the horizontal member 4, and one bracket 6L on the front side (the lower side in the drawing). The locking body 10 of the base end portion 5a of the material 5A is pivotally connected, and a holding device 18L is mounted on the back side (upper side in the figure). On the contrary, the bracket 6R on the right end is on the back side (upper side in the figure). The locking member 10 of the base 5a of the other oblique member 5B is pivotally connected to the other diagonal member 5B, and the holding device 18R is mounted on the front side (the lower side in the figure).

The holding devices 18L, 18R mounted on the brackets 6, 6 at both left and right end portions of the horizontal member 4 have the same configuration, and there is no need to prepare two types of right-handed and left-handed ones. .

Then, as shown in FIG. 6, when the distal ends 5b and 5b of the diagonal members 5A and 5B are rotated toward the storage posture P2, the one diagonal member 5A moves the locked portion 17 of the distal end 5b to the right end. Similarly, the other diagonal member 5B makes the locked portion 17 of the tip portion 5b the spring of the holding device 18L of the bracket 6L at the left end. The user faces the clip 21.

Therefore, when the distal ends 5b, 5b of the diagonal members 5A, 5B are further rotated to the storage posture P2, as shown in FIGS. 7 and 8, the distal ends 5b, 5b of the diagonal members 5A, 5B are respectively engaged. The stoppers 17, 17 are held by entering the spring clips 21 of the holding devices 18R, 18L to hold the storage posture P2.

The locked portion 17 enters by elastically expanding the opening width W1 while being guided by the guide edge 52 of the spring clip 21, and after entering, the spring clip 21 reduces the opening width W1 by elastic restoration. The locking portion 17 is held in a state where it is difficult to fall off.

When changing the posture of the safety handrail 3 from the retracted posture P2 to the deployed posture P1 and attaching the safety handrail 3 to the scaffold construction, the locked portion 17 of the diagonal member 5 is pulled out against the elasticity of the spring clip 21 and pulled out as it is. By simply turning the diagonal members 5, 5 in the directions, the deployment posture P1 can be easily and easily set.

(First Modification of Detent Device)
FIG. 9 shows a first modification of the rotation stopping means 24 in the holding device 18 according to the first embodiment. The mounting portion 19 of the holding device 18 is provided with a projection 25 by embossing or the like from the front surface to the rear surface of the flat plate portion 19a, and the bracket 6 constituting the attached portion 16 is formed by a concave portion or a hole for locking the projection 25. The formed engaging portion 26 is provided, and the protrusion 25 and the engaging portion 26 which are mutually locked together constitute the rotation stopping means 24.

(Second Modification of Detent Device)
FIG. 10 shows a second modification of the rotation stopping means 24 in the holding device 18 according to the first embodiment. The mounting portion 19 of the holding device 18 is provided with a rib 27 protruding from a part of the flat plate portion 19a toward the back surface, and the bracket 6 constituting the attached portion 16 is provided with a groove-like slit 28 into which the rib 27 is fitted. The rib 27 and the slit 28 which fit together constitute the rotation stopping means 24.

(Other modifications)
In addition to the above-described first and second modified examples, by adopting various configurations between the mounting portion 19 of the holding device 18 and the bracket 6 forming the attached portion 16, the mounting portion 19 can be pivoted. It is possible to provide anti-rotation means 24 for preventing rotation around 7a. In this case, however, the holding device 18 is not formed by combining a plurality of separate parts, but as shown in the figure. Preferably, one metal plate is provided as one bent part.

(Second embodiment of storage and holding device)
11 to 13 show a second embodiment of the storage and holding device according to the present invention. In this case, the safety handrail 3 has both ends of the horizontal member 4 adjacent to and opposed to each other in the storage posture P2. With respect to the portions 4a, 4a and the tip portions 5b, 5b of the diagonal members 5, 5, the attachment portions 16 are formed in the circular pipe portions of the tip portions 5b, 5b of the diagonal members 5, 5, and both end portions of the horizontal member 4 4a and 4a constitute a locked portion 17, and by attaching a holding device 18 to the attached portion 16, the locked portion 17 is detachably locked and held by the holding device 18. It is configured as follows.

The holding device 18 includes an attachment portion 19 for holding the attached portion 16 of the oblique member 5 formed by the circular tube portion, a support portion 20 extending upward from the attachment portion 19, and a support member 20 extending laterally from the support portion 20. It is provided with a C-shaped spring clip 21 which is bent and opened upward, and is formed by bending a single metal plate.

The mounting portion 19 forms a U-shaped bent portion 19b for holding the attached portion 16 of the oblique member 5, and a bolt that penetrates up and down while holding the attached portion 16 by the bent portion 19b; It is fixed by fixing means 29 composed of a nut.

Accordingly, in the known safety handrail 3 of the above-described wedge binding type, the holding device 18 can be easily retrofitted by using the circular tube portion of the tip portion 5b of the diagonal member 5 as the attachment portion 16. It is possible to provide a versatile storage and holding device.

At this time, the mounting portion 19 of the holding device 18 constitutes a rotation stopping means 24 by a fixing means 29 composed of a bolt and a nut. Rotation is prevented, the spring clip 21 is positioned so as to always open in a predetermined upward direction, and the posture is maintained.

As in the case of the first embodiment, the spring clip 21 has an inner peripheral surface that holds the outer diameter D2 of the locked portion 17 of the horizontal member 4, and has an opening width W2 of the upward opening. It is preferable to form a guide edge 52 that is formed so as to satisfy W2 <D2 and that is bent at the opening edge so as to expand outward.

12 and 13 show the operation of the holding device 18 when the posture of the diagonal members 5, 5 of the safety handrail 3 is changed from the deployed posture P1 to the stored posture P2.

As shown in a plan view in FIG. 13, the safety handrail 3 has a left end bracket 6L of the front and back surfaces of the brackets 6 at both left and right end portions of the horizontal member 4, and has one oblique side on the front side (the lower side in the figure). On the contrary, the bracket 6R at the right end is provided on the rear side (upper side in the drawing) to lock the base end 5a of the other diagonal member 5B. The body 10 is connected.

Therefore, the direction in which the spring clip 21 of the holding device 18A attached to the attached portion 16 of the one oblique member 5A and the spring clip 21 of the holding device 18B attached to the attached portion 16 of the other oblique member 5B face each other. When the diagonal members 5, 5 are rotated toward the storage posture P2, the spring clips 21, 21 of both holding devices 18A, 18B are positioned immediately below the locked portions 17, 17 of the horizontal member 4. It is arranged to face.

Note that the holding devices 18A and 18B attached to the attachment portions 16 of the pair of diagonal members 5A and 5B have the same configuration, and there is no need to prepare two types of right-handed and left-handed ones. .

Therefore, as shown in FIG. 12, when the tip portions 5b and 5b of the oblique members 5A and 5B are turned toward the storage posture P2, the spring clips 21 and 21 of the holding devices 18A and 18B respectively attached to the horizontal members 5A and 5B. 4 faces the locked portions 17 at both ends.

Therefore, when the tip portions 5b, 5b of the oblique members 5A, 5B are further rotated together with the holding devices 18A, 18B to the storage posture P2, the locked portions 17, 17 at both ends of the horizontal member 4 are moved to the holding devices 18A, 18B. Of the slant members 5A and 5B in the retracted posture P2.

The locked portion 17 enters by elastically expanding the opening width W2 while being guided by the guide edge 52 of the spring clip 21, and after entering, the spring clip 21 reduces the opening width W2 by elastic restoration and falls off. The locked portion 17 is held in a difficult state.

In addition, when changing the posture of the safety handrail 3 from the retracted posture P2 to the deployed posture P1 and mounting the handrail on the scaffolding structure, the locked portion 17 of the horizontal member 5 is pulled out against the elasticity of the spring clip 21, and thereafter, By simply rotating the diagonal members 5, 5, the deployed posture P1 can be easily and easily set.

(Modification of the second embodiment)
FIG. 14 shows a modification of the holding device 18 according to the second embodiment. The mounting portion 19 of the holding device 18 is formed by a C-shaped bent portion 19c that constitutes a spring for holding the attached portion 16 of the oblique member 5 in an elastic state, and the outer diameter D3 of the attached portion 16 is formed. The width W3 of the lateral opening of the bent portion 19c is formed so as to satisfy W3 <D3, and the guide edge 30 is formed so as to be bent outward at the opening edge.

The C-shaped bent portion 19c is provided with a projection 31 by embossing or the like from the front surface to the back surface, and the tubular portion of the oblique member 5 forming the adhered portion 16 has a concave portion or a hole for locking the projection 31. Are provided, and the protrusion 31 and the engaging portion 32 that are mutually locked together constitute the rotation stopping means 24.

Then, when the attached portion 16 is pushed into the C-shaped bent portion 19c, the attached portion 16 enters the C-shaped bent portion 19c while elastically expanding the opening width W3. 19c reduces the opening width W3 by elastic restoration, thereby holding the adhered portion 16 and elastically attaching it so as to make it difficult to fall off.

At this time, the projection 31 constituting the rotation stopping means 24 is fitted into the engagement portion 32, and prevents the holding device 18 from rotating in the circumferential direction of the circular tube portion constituting the attached portion 16, and the spring The clip 21 is positioned so as to always open in a predetermined upward direction, and the posture is held. Other configurations are the same as those of the above-described second embodiment.

(Third Embodiment of Storage and Holding Device)
15 to 20 show a third embodiment of the storage and holding device according to the present invention. As in the case of the first embodiment, the safety handrail 3 includes a horizontal member 4 and a pair of diagonal members 5, 5. Brackets 6, 6 fixed to both ends of the horizontal member 4, the diagonal member 5, 5 are pivotally connected to each other by a pivot 7a of pivoting means 7, and by rotating the diagonal members 5, 5, the distal end portions 5b, 5b of the pair of diagonal members 5, 5 are connected. The bracket 6 is configured to enable a storage posture P2 adjacent to the brackets 6, 6 and a deployment posture P1 in which the diagonal members 5, 5 cross each other below the horizontal member 4. In this state, the locked portion 17 is formed by the tip 5b of the diagonal member 5 adjacent to the bracket 6 in the storage posture P2, and the locked portion 17 is attached and detached. A holding device 18 for freely locking and holding is provided on the attached portion 16 of the bracket 6. The holding device 18 is configured such that by bending one metal plate, the attachment portion 19 attached to the attachment portion 16 via the pivot 7a and the engagement portion 17 can be detachably attached. The spring clip 21 to be held is formed integrally.

In the third embodiment, as shown in FIG. 15, the holding device 18 has a configuration in which the mounting portion 19 is included in the spring clip 21, and the pivot 7 a is attached to the flat plate portion 19 a that is superimposed on the mounting portion 16 of the bracket 6. An attachment portion 19 is formed by opening a through hole 22 for insertion, and a pair of bent pieces 51, 51 formed on both sides of the attachment portion 19 are provided. A spring clip 21 having a groove 50 that opens in the lateral direction of the bracket 6 is formed by the entirety of 51 and 51.

The mounting portion 19 is overlapped with the attachment portion 16 of the bracket 6, and the bracket 6 and the base end portion 5 a of the diagonal member 5 (in the example shown in FIG. The pivot 7a of the pivoting means 7 for pivoting the locking member 10) is inserted into the through hole 22 of the mounting portion 19, and the nut 7b is screwed into the pivot 7 to be attached to the portion 16 to be attached. You.

At this time, the pivot 7a includes a shank portion 54 extending from the head portion 53 and a bolt portion 55 further extending from the shank portion 54. 50 and the shank portion 54 was inserted into and removed from three mounting holes of the mounting portion 19, the bracket 6, and the base end portion 5 a of the diagonal member 5. The nut 7b is screwed onto the bolt portion 55.

Therefore, in the known safety handrail 3 provided with the above-described locking mechanism 9 of the wedge binding type, by using the bracket 6 as the attachment portion 16 and using the pivot 7a, the holding device 18 can be easily provided. Can be added later, and a versatile storage and holding device can be provided.

As shown in FIGS. 15 and 16, the safety handrails 3 are, as in the first embodiment, the front sides (front sides in the drawing) of the brackets 6, 6 at the left and right ends of the horizontal member 4 and the back side opposite thereto. Among them, the bracket 6L at the left end has the front side connected to the locking body 10 of the base end 5a of the one oblique member 5A, and has the holding device 18L mounted on the back side. The bracket 6R of the part pivotally connects the locking body 10 of the base end 5a of the other diagonal member 5B on the back side, and has the holding device 18R mounted on the front side. At this time, the holding devices 18L and 18R mounted on the brackets 6 and 6 at both left and right end portions of the horizontal member 4 have the same configuration, and therefore, two types of right-handed and left-handed ones are prepared. No need.

In the case of the third embodiment, as shown in FIGS. 17A and 17B, the tip 5b of the diagonal member 5 is rotated toward the storage posture P2, and the locked portion 17 of the tip 5b is moved to the above position. As shown in FIGS. 17C and 17D, the spring clip 21 attached to the bracket 6 is pushed toward the bottom of the groove 50 from the state in which the spring clip 21 faces the groove 50 opened laterally. The locking portion 17 is configured to be locked and held by the spring clip 21.

Therefore, as shown in FIG. 18, the pair of diagonal members 5A and 5B have holding devices 18R in which the locked portions 17 and 17 of the distal ends 5b and 5b are provided at both ends 4a and 4a of the horizontal member 4, respectively. It is held by entering the spring clip 21 of 18L and holds the storage posture P2. When changing the posture of the safety handrail 3 from the retracted posture P2 to the deployed posture P1 and attaching the safety handrail 3 to the scaffold construction, the locked portion 17 of the diagonal member 5 is pulled out against the elasticity of the spring clip 21 and pulled out as it is. By simply turning the diagonal members 5, 5 in the directions, the deployment posture P1 can be easily and easily set.

As shown in FIG. 19 (B), the base end 5a of the diagonal member 5 pivotally connected by the pivot 7a (in the illustrated example, the end 5e of the diagonal member 5 fixed by polymerization and the locking member 10 are included. Part T), the thickness T2 of the bracket 6, and the thickness T3 of the mounting portion 19 (the flat plate portion 19a) of the spring clip 21 constituting the holding device 18, with respect to the shank portion 54 of the pivot 7a. Is formed such that L> T1 + T2 + T3, and the nut 7b screwed to the bolt portion 55 is located at the shaft end of the shank portion 54 and fastened to the bolt portion 55. In the illustrated example, the outer diameter of the shank portion 54 is formed to be larger than the thread diameter of the bolt portion 55 so that the nut 7b is brought into contact with the shaft end of the shank portion 54. However, the present invention is not limited to this.

As a result, clearances C1 and C2 are formed on both sides (between the base end 5a and the nut 7b, between the base end 5a and the bracket 6) of the base end 5a of the diagonal member 5. As shown by an angle θ in FIG. 19 (A), the horizontal member 4 can be tilted so as to be able to separate in the lateral direction, and as a result, the engagement of the diagonal member 5 rotated toward the storage posture P2 is possible. The stop 17 is configured to be able to face the opening of the groove 60 of the spring clip 21.

The spring clip 21 facing the locked portion 17 allows the mounting portion 19 to be rotatable around the axis of the shank portion 54 of the pivot 7a. The posture can be easily and easily adjusted so that the portion 17 can be received, that is, the holding pieces 51 and 51 are parallel to the axis of the locked portion 17.

As shown in the drawing, the spring clip 21 has a receiving portion 56 at the bottom of the groove portion 50 for abutting the locked portion 17 when the locked portion 17 is held in the groove portion 50. In the illustrated example, the receiving portion 56 is formed by the head 53 of the pivot 7a arranged so as to overlap the mounting portion 19.

The pair of holding pieces 51, 51 of the spring clip 21 are bent from both sides of the mounting portion 19 so as to be inclined in the approaching direction to each other, thereby forming the elastic contact portion 57 defining the opening width W of the groove portion 50. The guide edge 52 formed and bent from the elastic contact portion 57 extends.

The opening width W is formed such that W <D with respect to the outer diameter D of the locked portion 17, and the opening width W is from the receiving portion 56 to the elastic contact portion 57 that defines the opening width W. The distance, that is, the depth S of the groove portion 50 is formed such that S> R with respect to the radius R (ie, 1 / 2D) of the locked portion 17.

Further, the length H of the holding piece 51 from the receiving portion 56 to the tip of the guide edge 52 is formed such that H <D with respect to the outer diameter D of the locked portion 17.

Therefore, as shown in FIG. 20 (A), the oblique member 5 is rotated toward the storage position P2, and the locked portion 17 faces the side of the spring clip 21 from the state in which the opening portion of the groove portion 50 is opened. When pushed into the groove 50, the locked portion 17 abuts on the elastic contact portions 57, 57 while being guided by the guide edges 52, 52, and pushes the pair of holding pieces 51, 51 against the elasticity into the groove portion 50 while expanding the pair. enter in.

The locked portion 17 that has entered the groove portion 50 is received by being brought into contact with the receiving portion 56, and is held by the elastic contact portions 57, 57 that receive the elastic restoring force of the holding pieces 51, 51. You. At this time, since the elastic contact portions 57 and 57 satisfy S> R as described above, the outer peripheral surface (the portion of the peripheral surface facing the outside of the groove portion) exceeding the maximum diameter portion of the locked portion 17 is used. ) Is sandwiched, and the locked portion 17 is repelled toward the receiving portion 56, thereby suitably preventing the locked portion 17 from dropping out of the groove 50. In the case of the illustrated embodiment, since the receiving portion 56 is formed by the head 53 of the pivot 7a, the entire length of the holding piece 51 bent from the mounting portion 19 may be formed to be longer than the groove depth S. Thus, the elasticity of the holding piece 51 is ensured.

In a state in which the locked portion 17 is held inside the groove 50, the length of the holding pieces 51, 51 is set to H <D, so that the tip of the holding piece 51 (in the illustrated embodiment) In this case, a part of the peripheral surface of the locked portion 17 protrudes from the tip of the guide edge 52) as shown by reference numeral h, and the protruding part of the peripheral surface forms the protection part 58.

When transporting the safety handrail 3 in a state in which the diagonal member 5 is held in the storage posture P2 by the holding device 18 when the diagonal member 5 is held in the storage posture P2, the protection member 58 collides with a foreign object such as an operator sliding his hand to drop the safety handrail 3 In such a case, the protection portion 58 is intentionally made to collide with the foreign matter, thereby preventing the tip of the spring clip 21 from colliding with the foreign matter and preventing the spring clip 21 from being deformed and damaged. When such a protection portion 58 is not provided, the spring clip 21 formed by bending a leaf spring is vulnerable to an impact, and the predetermined clip function may be reduced or lost by easily breaking the holding piece 51. On the other hand, the locked portion 17 of the diagonal member 5 made of a metal pipe material has a relatively high strength, and even if a slight deformation occurs, there is a special hindrance to the function of the diagonal member 5. Because they will not come.

DESCRIPTION OF SYMBOLS 1 Support 2 Flange 3a Wedge hole 3 Safety handrail 4 Horizontal member 4a Both ends 5 Diagonal member 5a Base end 5b Tip 6 Bracket 7 Pivoting means 7a Pivot 7b Nut 8 Locking mechanism 9 Locking mechanism 10 Locking body 11 Locking Pin 12 Holding member 13 Wedge piece 14 Rope 15 Hook with hook 16 Attachment part 17 Attachment part 18 Holding device 19 Attachment part 19a Flat plate part 19b U-shaped bent part 19c C-shaped bent part 20 Support part 21 Spring clip 22 Through hole 23 Folded wall 23a Groove 24 Detent means 25 Projection 26 Engagement part 27 Rib 28 Slit 29 Fixing means 30 Guide edge 31 Projection 32 Engagement part 50 Groove 51 Nipping piece 52 Guide edge 53 Head 54 Shank Part 55 bolt part 56 receiving part 57 elastic contact part 58 protection part

Claims (8)

A horizontal member and a pair of diagonal members are provided, and both ends of the horizontal member and a base end of the diagonal member are rotatably connected by pivoting means, and the diagonal member is rotated. A scaffold configured to allow a retracted posture (P2) in which the front end of the horizontal member is adjacent to both ends of the horizontal member and a deployed position (P1) in which the diagonal members cross each other below the horizontal member. Safety railing
With respect to the both ends (4a, 4a) of the horizontal member (4) and the tip portions (5b, 5b) of the diagonal members (5), which are adjacent to each other in the storage posture, the attachment part ( 16) and constitutes a locked part (17) by the other, and a holding device (18) for detachably locking and holding the locked part is attached to the attached part,
The holding device (18) integrally includes a mounting portion (19) attached to the attached portion (16) and a spring clip (21) for detachably holding the engaged portion (17). A storage and holding device for a scaffolding safety handrail, characterized by being formed. With a horizontal member and a pair of diagonal members, the base end (5a) of the diagonal member (5, 5) is attached to a bracket (6, 6) fixed to both ends of the horizontal member (4) by a pivot (7a). By pivotally connecting and rotating the diagonal members (5, 5), the tip portions (5b, 5b) of the pair of diagonal members (5, 5) are adjacent to the brackets (6, 6). The stowed safety handrail configured to enable the stowed posture (P2) and the deployed posture (P1) in which the diagonal members (5, 5) cross each other below the horizontal member (4). ,
An attachment portion (16) is formed on the bracket (6), and the attachment portion (16) is locked to the tip portion (5b) of the diagonal member (5) adjacent to the bracket (6) in the storage posture (P2). Forming a part (17), a holding device (18) for detachably locking and holding the locked part (17) is provided on the mounting part (16) of the bracket (6),
The holding device (18) is formed by bending a single metal plate, and is attached to the attachment portion (16) via the pivot (7a). A storage and holding device for a scaffolding safety handrail, wherein a spring clip (21) comprising a holding piece (51, 51) for detachably holding a portion (17) is integrally formed. In the storage posture (P2), the end portions (4a, 4a) of the horizontal member (4) are attached to the end portions (16 ), And the tip (5b, 5b) of the diagonal member (5) constitutes a locked part (17), and the horizontal member (4) is attached to a bracket (6) fixed to both ends. A base end (5a) of the diagonal member (5) is rotatably connected to a pivot (7a), and the bracket (6) constitutes the attached part (16),
The mounting portion (19) of the holding device (18) includes a flat plate portion (19a) which is fixed to the bracket (6) by being inserted therethrough by being inserted through the pivot (7a). The storage handhold for a scaffolding safety handrail according to claim 1, further comprising a rotation preventing means (24) for locking said mounting portion (19) so as to be unrotatably around said pivot. apparatus. In the storage posture (P2), the end portions (5b, 5b) of the diagonal member (5) are covered with the circular pipe portions with respect to the ends of the horizontal member and the diagonal end portions which are adjacent to each other and face each other. Along with forming the attachment portion (16), the locked portion (17) is formed by both ends (4a, 4a) of the horizontal member (4),
The mounting portion (19) of the holding device (18) includes a bent portion (19b, 19c) that is fixed while holding a circular tube portion that constitutes the attached portion (16). The rotation preventing means (24) for locking the mounting portion (19) so as not to rotate around the axis of the circular tube portion is provided between the portion and the attached portion. A storage and holding device for the safety handrail for a scaffold described in the above. The spring clip (21) forms a groove (50) for holding the peripheral surface of the locked part (17) having an outer diameter D by the holding pieces (51, 51),
The holding pieces (51, 51) are formed such that the opening width W of the opening of the groove (50) is W <D, and is elastically deformable in a direction in which the opening width is expanded. The storage and holding device for a scaffold safety handrail according to claim 2, characterized in that a guide edge (52, 52) extending outward from the opening edge of the (50) is extended. The spring clip (21) forms a groove portion (50) for holding the peripheral surface of the locked portion (17) having an outer diameter D by the holding pieces (51, 51), and is formed in the groove portion. A receiving portion (56) for contacting the held locked portion (17) is formed at the bottom of the groove,
The holding pieces (51, 51) are formed such that the length H from the receiving part (56) to the tip of the holding piece is H <D with respect to the outer diameter D of the locked part (17). The protection portion (58) projecting from the tip of the holding piece (51, 51) is formed by a part of the peripheral surface of the locked portion (17) held by the groove (50). The storage and holding device for a scaffolding safety handrail according to claim 2 or 5, wherein The spring clip (21) has the holding pieces (51, 51) on both sides of a mounting portion (19) through which a pivot (7a) is inserted in a state where the spring clip (21) is placed on the mounting portion (16) of the bracket (6). It is bent, and a groove (50) that opens in the lateral direction of the bracket is formed by the holding piece,
The pivot (7a) is characterized in that a head (53) of the pivot is located at the bottom of the groove (50), and the receiving part (56) is formed by the head (53). Item 7. A storage and holding device for a scaffold safety handrail according to Item 6. The pivot (7a) is attached from the head (53) located at the bottom of the groove (50) to a mounting portion (19) of the spring clip having a thickness T3 and the horizontal member having a thickness T2. The bracket (6) of (4) and the shank (54) inserted through the base end (5a) of the diagonal member (5) having a thickness T1 are extended, and are extended from the shank. Nut (7b) is screwed into the bolt (55).
By forming the axial length L of the shank portion (54) so that L> T3 + T2 + T1, clearances (C1, C2) are formed on both sides of the base end portion (5a) of the diagonal member. The storage and holding device for a scaffold safety handrail according to claim 7, wherein:

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