JP2003301603A - Fall-prevention device for scaffolding board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fall-prevention device for a scaffolding board preventing fall of a construction material or the like from the scaffolding board. <P>SOLUTION: The fall-prevention device 15 made of metal mainly comprises a fall-prevention board 16 erected on the scaffolding board 11, a supporting part 17 extended downward from the fall-prevention board 16, and an engaging body 18 mounted to the lower end of the supporting part 17 to move up and down. Each insertion cylindrical part 17a is joined to the lower end of the supporting part 17, and a supporting shaft 19 is inserted into each cylindrical insertion part 17a. The engaging body 18 is mounted to the upper end of each supporting shaft 19, and each engaging body 18 is constantly urged upward by a spring force of a coil spring 21. An engaging part 16a of the fall-prevention board 16 is engaged with an engaging recess portion 14 recessed in the scaffolding board 11, and by engaging the engaging body 18 with the lower end of the scaffolding board 11, the fall-prevention board 16 is erected on the surface of the scaffolding board 11. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention tool attached to a scaffold plate of a scaffold for construction and for preventing construction materials and the like placed on the scaffold plate from falling.

[0002]

2. Description of the Related Art Conventionally, when building a building, a scaffolding pipe composed of a plurality of scaffolding pipes, a square plate-shaped scaffolding plate, a horizontal pipe, etc. The scaffold is built. An operator walks on the scaffolding board, and tools, adhesives, building materials, etc. are placed on the scaffolding board.

[0003]

However, since the conventional scaffolding plate has a flat plate shape, there is a problem that the building material and the like placed on the scaffolding plate may drop from the scaffolding plate. there were.

The present invention has been made by paying attention to the problems existing in the above prior art. It is an object of the invention to provide a scaffolding plate fall prevention tool that can prevent construction materials and the like from falling on the scaffolding plate.

[0005]

In order to solve the above-mentioned problems, the invention as set forth in claim 1 has a plurality of scaffolding pipes erected upright, and a scaffolding plate is installed between the scaffolding pipes. In the formed scaffolding for construction, a fall prevention tool attached to the scaffolding plate to prevent falling of building materials and the like placed on the scaffolding plate, having a plate shape, and the scaffolding plate at the lower end. A fall prevention plate having an engaging portion that engages with an engaged portion formed on the surface of the same, a support portion extending downward from the fall prevention plate, and arranged below the fall prevention plate. The lower end portion of the support portion is vertically movably supported, and the engaging portion engages with the lower end portion of the scaffolding plate. The engaging portion engages with the engaged portion and the scaffolding plate in the vertical direction. To the lower end of the scaffold plate of the engaging body that has been moved up and down according to the thickness of the And summarized in that it mounted in a state of erecting drop preventing plate scaffolding plate surface.

According to a second aspect of the present invention, in the scaffolding plate fall prevention tool according to the first aspect, the engagement body is supported by the support portion while being urged upward by the urging force of the urging member. That is the summary.

According to a third aspect of the present invention, in the scaffolding plate fall prevention tool according to the first or second aspect, a scaffold is provided on an upper portion of the engagement body when the engagement body is moved upward. The gist is that a guide piece is formed to extend outward so as to guide the upward movement of the engaging body by restricting the locking of the lower end of the plate.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a scaffolding plate fall prevention tool embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a scaffolding plate 11 made of metal.
Is a main body 12 formed in the shape of an elongated rectangular frame in plan view, and a mesh-shaped step portion 13 installed inside the main body 12.
It is formed by and. The main body 12 has a pair of long side walls 12a facing each other and a pair of short side walls 12b facing each other.
It is formed by and.

Then, as shown in FIG. 3, each long side wall 12
Each of the a and the short side wall 12b is bent and formed in a substantially U-shaped cross section so as to open inward of the main body 12 (only the long side wall 12a is shown in FIG. 3). As shown in FIG. 3, an attachment piece 12c extending downward from the upper surface of the long side wall 12a and extending substantially horizontally inward of the main body 12 is provided on the inner side surfaces of the pair of long side walls 12a. It is formed along the direction.

The pair of mounting pieces 12 facing each other are provided.
The long side edge and the short side edge of the step portion 13 are welded to the upper surface of c and the inner side surface of the short side wall 12b, so that the scaffold plate 11
Are formed. Also, the inner surface of each mounting piece 12c,
A long side wall 12a is provided between the long side edge of the step portion 13 and the side edge 12a.
A gap extending along the lengthwise direction is formed, and the gap forms an engagement recess 14 as an engaged portion.
As shown in FIG. 1, a pair of hooking claws 12d are provided on the outer surfaces of the pair of short side walls 12b so as to project therefrom.

Next, a fall prevention tool 15 attached to the scaffold plate 11 (hereinafter, simply referred to as a fall prevention tool 15)
Will be described. The metal fall prevention tool 15 includes a fall prevention plate 16 provided upright on the scaffolding plate 11 and the fall prevention plate 1
6 mainly includes a support portion 17 extending downward from the support 6, and an engagement body 18 supported by a lower end portion of the support portion 17 so as to be vertically movable.

As shown in FIGS. 1 and 2, the fall prevention plate 16 has an elongated rectangular plate shape, and the length along the long side of the fall prevention plate 16 opposes the pair of short side walls 12b. It is formed to be slightly shorter than the length between the inner side surfaces. Also,
The thickness of the fall prevention plate 16 is formed to be slightly shorter than the length of the engagement recess 14 in the width direction. And FIG.
As shown in FIG. 3, the lower end portion of the fall prevention plate 16 is provided with an engaging portion 16 a which is inserted into the engaging concave portion 14 and is engageable with the engaging concave portion 14.

As shown in FIGS. 1 to 3, the fall prevention plate 16
Slightly above the lower edge of one surface, that is, the engaging portion 16a
The supporting portions 17 are joined to the upper portion at three positions at equal intervals in the length direction of the fall prevention plate 16. Each support 17
Is formed so as to extend substantially horizontally outward from the fall prevention plate 16, bend downward, and further extend substantially horizontally in the direction of the fall prevention plate 16.

As shown in FIG. 2, the upper end portion of each support portion 17 is joined to the fall prevention plate 16, and the lower end portion is arranged below the fall prevention plate 16. At the lower end of each of the support parts 17, an insertion tube part 17a extending vertically in a tubular shape is formed.
Are joined together, and the insertion tube portions 17a are formed so as to be positioned below the fall prevention plate 16.

As shown in FIG. 4, the support shafts 19 are inserted into the respective insertion tube portions 17a, and the stop pins 20 projecting outward of the support shafts 19 are provided at the lower ends of the respective support shafts 19. ing. An engaging body 18 that is substantially L-shaped in side view and is engageable with the lower end of the scaffolding plate 11 is provided at the upper end of each support shaft 19. Each engagement body 18 includes a flat bottom plate 18a joined to the upper end of the support shaft 19, and an engagement piece 18b extending upward from one side edge of the bottom plate 18a. Further, on the upper part of the engagement body 18, that is, the upper end of the engagement piece 18b, a guide extending outward from the engagement piece 18b so as to be separated from the support portion 17, specifically, a guide extending obliquely upward from the engagement piece 18b. The piece 18c is formed.

The bottom surface of each bottom plate 18a and the insertion tube portion 17a
A coil spring 21 as a biasing member is interposed between the coil spring 21 and the upper surface of the engaging member 18, and the engaging body 18 is always biased upward by the biasing force of the coil spring 21. The contact of the stop pin 20 with the lower surface of the insertion tube portion 17a restricts the support shaft 19 from coming out upward from the insertion tube portion 17a.

As shown in FIG. 5, in the scaffolding 30 for construction, a plurality of scaffolding pipes 33 are formed by connecting vertical pipes 31 standing upright in front of and behind each other with hooking pipes 32.
A scaffolding plate 11 is formed between the two members.
That is, the hooking claws 12d are hooked on the hooking pipes 32 that face each other from above, so that the scaffolding board 11 becomes a scaffolding for construction 3
It is installed at 0.

In order to attach the fall prevention tool 15 having the above-mentioned structure to the scaffolding plate 11, first, as shown in FIG. 3, the engaging portion 16a is engaged with the engaging concave portion 14. Next, each support shaft 1
9 is moved downward against the biasing force of the coil spring 21,
The support portion 17 side is rotated downward around the engagement position between the engagement portion 16a and the engagement recess 14 while preventing each engagement body 18 from contacting the outer surface of the long side wall 12a.

As shown in FIG. 4, the inner surface of each supporting portion 17 abuts on the upper surface and the outer surface of the long side wall 12a, and each supporting portion 17
The support shafts 19 are arranged so that they extend in the vertical direction.
Release the downward pulling state of. Then, each engaging member 18 is moved by the urging force of the coil spring 21 as shown in FIG.
It is moved upward from the position indicated by the dotted line. At this time, the fall prevention tool 15 is attached from the outside of the scaffolding board 11,
Even if the guide piece 18c contacts the lower surface of the long side wall 12a, the guide piece 18c slides on the lower surface of the long side wall 12a to guide the upward movement of the engaging body 18.

The upper surface of each bottom plate 18a is the long side wall 12a.
Of the long side wall 12 while contacting the lower surface of the
It is arranged on the inner surface of the lower end of a. At this time, each engaging piece 1
8b is located above the lower edge of the long side wall 12a.
As a result, the engagement portion 16a is engaged with the engagement recess 14, and the engagement piece 18b of each engagement body 18 is engaged with the lower end portion of the long side wall 12a, so that the fall prevention plate 16 is provided on the surface of the scaffolding plate 11. And the building scaffolding 3 as shown in FIG.
The fall preventive tool 15 is attached to 0.

According to the fall prevention tool 15 of the above embodiment,
The following characteristics can be obtained. (1) The fall prevention member 15 is immovably attached to the scaffolding plate 11 by engaging the engaging portion 16a with the engaging recess 14 and engaging the engaging piece 18b with the lower end of the long side wall 12a. The fall prevention plate 16 can be erected on the surface of the scaffolding plate 11. Therefore, for example, even if the building material on the scaffolding plate 11 hits the fall prevention plate 16 and an external force is applied, the movement of the fall prevention device 15 is prevented, and the standing state of the fall prevention plate 16 is maintained. Therefore, the fall prevention plate 16 can prevent the building material and the like placed on the scaffolding plate 11 from falling.

(2) The support shaft 19 is supported by the insertion tube portion 17a, so that the engaging body 18 attached to the support shaft 19 is vertically movable. Therefore, the position of the engagement body 18 can be made to correspond to the vertical thickness of the scaffolding plate 11, and a plurality of types of scaffolding plates 11 having different thicknesses can be provided.
The fall prevention tool 15 can be attached to the. Therefore,
It is possible to save the troublesome work of preparing the specific fall prevention tool 15 on the specific scaffold plate 11.

(3) Since the engaging body 18 is biased by the coil spring 21 so as to approach the long side wall 12a, the engaging body 18 can be automatically engaged with the lower end portion of the long side wall 12a. Therefore, the coil spring 21 is not provided,
The support shaft 19 is arranged so that the engaging body 18 engages with the long side wall 12a.
Compared with the case of fixing the to the insertion tube portion 17a, the work of attaching the fall prevention tool 15 to the scaffold plate 11 can be performed easily.

(4) It is possible to prevent the upper end of the engaging body 18 from being locked by the lower surface of the long side wall 12a by the guide piece 18c and restricting the upward movement of the engaging body 18, and to prevent the engaging body 18 from moving toward the long side wall 12a.
The lower surface can be securely engaged.

(5) Since the engagement piece 18b is located above the edge of the long side wall 12a, even if an external force acts on the fall prevention tool 15 in a direction away from the scaffolding plate 11, the engagement piece 18b is engaged. The engagement between 18b and the lower end of the long side wall 12a can be maintained.

The above embodiment may be modified as follows. In the embodiment, the support portions 17 are formed at three locations on the fall prevention plate 16 and the engaging bodies 18 are provided at three locations.
7 and the engaging body 18 may be formed at one place or two places, or may be formed at four or more places.

In the embodiment, the engagement portion 16a is formed at the lower end portion of the fall prevention plate 16, but it may be changed as follows. As shown in FIG. 6, the supporting portion 17 is extended from the lower end edge of one surface of the fall prevention plate 16 and is horizontally extended outward from the lower end edge of the other surface of the fall prevention plate 16 so as to be separated from the same. The engaging projection 23 extending downward and extending downward is formed as an engaging portion. At this time, the engaging portion 16a of the embodiment
Is omitted. Further, in the scaffolding plate 11, the long side edge of the step portion 13 is joined so as to reach the inner side surface of the mounting piece 12c, and the engagement recess 14 is omitted.

In order to attach the above-mentioned fall prevention tool 15 to the scaffold plate 11, the engaging projection 23 is attached to the mesh 13a as the engaged portion formed by forming the mesh surface of the stepped portion 13. Then, the fall prevention tool 15 is rotated to engage the engagement body 18 with the inner surface of the lower end of the long side wall 12a in the same manner as in the embodiment. As a result, the fall preventive tool 15 is attached to the scaffolding plate 1.
1, the fall prevention plate 16 is erected on the surface of the scaffolding plate 11.

With this structure, even if the engaging recess 14 is not formed in the scaffolding plate 11, the engaging projection 23 engages with the mesh 13a and the engaging body 18 engages with the lower end of the long side wall 12a. The fall prevention plate 16 can be erected by the engagement. Therefore, by selecting the fall preventive tool 15 to be used according to the form of the scaffold plate 11, the fall preventive tool 15 can be attached to various scaffold plates 11.

In the embodiment, the guide piece 18c is formed on the engagement body 18, but the guide piece 18c may be omitted. Further, the guide piece 18c may be curved in an arc shape so as to be separated from the support portion 17.

In the embodiment, the engaging body 18 is biased upward by the coil spring 21, but the coil spring 21 may be omitted. Then, the support shaft 19 and the insertion tube portion 17a
Through holes penetrating laterally in the vertical direction at a plurality of positions in the vertical direction, and at a position where the engaging body 18 is engaged with the inner surface of the lower end of the long side wall 12a, the fixing pin is inserted into each through hole to support the support shaft 19. Vertical movement may be restricted.

Alternatively, a screw portion is threaded on the inner peripheral surface of the insertion tube portion 17a, and a screw portion which can be screwed into the screw portion is formed on the outer peripheral surface of the support shaft 19. Further, the engagement body 18 is rotatably attached to the upper end of the support shaft 19 with the support shaft 19 as the rotation shaft. Then, the support shaft 19 may be screwed or unscrewed so that the engagement body 18 engages with the inner surface of the lower end of the long side wall 12a, thereby moving the engagement body 18 up and down.

In the embodiment, the coil spring 21 is embodied as the biasing member, but a leaf spring or the like may be used instead. In the embodiment, the scaffold plate 1 is rotated by rotating the entire fall prevention tool 15 with the engagement portion 16 a engaged with the engagement recess 14.
Although the fall preventive tool 15 is attached to No. 1, it may be changed as follows. The locking member 15 is moved downward, and the fall preventive tool 15 is attached to the scaffolding plate with a gap larger than the vertical thickness of the long side wall 12a formed between the upper end of the guide piece 18c and the lower end of the engaging portion 16a. Move to 11 side. Then, after engaging the engaging portion 16a with the engaging concave portion 14, each engaging body 18 may be moved upward to engage with the long side wall 12a to attach the fall prevention tool 15 to the scaffolding plate 11.

In the embodiment, the lower end portion along the long side direction of the fall prevention plate 16 is used as the engaging portion 16a, but the lower end portion of the fall prevention plate 16 is formed in a concavo-convex shape along the long side direction, and the gap is formed. The engaging portion 1 for engaging the mesh 13a at a convex position by placing
It may be 6a.

Next, the technical ideas that can be understood from the above-described embodiment and other examples will be added below along with their effects. (1) The surface of the scaffolding plate is formed in a mesh shape, and an engaged portion is formed in the mesh, and the fall prevention plate extends outward from the fall prevention plate and further extends downward. The scaffold plate fall prevention tool according to any one of claims 1 to 3, wherein a portion is formed. Even when configured in this manner, the engagement of the engaging portion and the engaged portion and the engagement between the engaging body and the lower end portion of the scaffolding plate can prevent falling of building materials and the like from the scaffolding plate. it can.

(2) With the engaging portion engaged with the engaged portion, the supporting member side is rotated in the direction in which the supporting portion side approaches the scaffolding plate with the engaging position as the center of rotation, and the engaging body moves. The scaffold according to any one of claims 1 to 3 and the technical idea (1), characterized in that the engagement body is engaged with the lower end portion of the scaffold plate after the scaffold is placed below the scaffold. Plate fall prevention tool. With this structure, the scaffold plate can be easily attached.

[0038]

As described above in detail, according to the first aspect of the present invention, it is possible to prevent construction materials and the like from falling from the scaffolding plate. Further, the engagement body is supported by the support portion so as to be vertically movable. Therefore, the position of the engaging body can be made to correspond to the vertical thickness of the scaffolding plate, and the fall-preventing plate can be erected by attaching the fall-preventing tool to a plurality of types of scaffolding plates. Therefore, it is possible to omit the troublesome work of preparing a specific fall prevention tool on a specific scaffold plate.

According to the invention described in claim 2, claim 1
In addition to the effect of the invention described in (1), since the engaging body is biased by the biasing member so as to approach the scaffold plate, the engaging body can be automatically engaged with the lower end portion of the scaffold plate. Therefore, the attachment work to the scaffold plate can be simplified.

According to the invention of claim 3, claim 1
Alternatively, in addition to the effect of the invention according to claim 2, it is possible to prevent the upper end of the engaging body from being locked by the lower surface of the scaffolding plate by the guide piece to prevent the upward movement from being restricted, and to prevent the engaging body from moving to the scaffolding plate. The lower end can be securely engaged.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a fall prevention tool of an embodiment is attached to a scaffold plate.

FIG. 2 is a perspective view showing a fall prevention tool of the embodiment.

FIG. 3 is a side sectional view showing a method for mounting the fall prevention tool of the embodiment.

FIG. 4 is a side sectional view showing a state where the fall prevention tool of the embodiment is attached to a scaffold plate.

FIG. 5 is a perspective view showing a scaffold for construction according to an embodiment.

FIG. 6 is a side sectional view showing another example of a fall prevention tool.

[Explanation of symbols]

11 ... Scaffolding plate, 13a ... Mesh as engaged part, 14 ...
Engagement recesses as engaged parts, 15 ... Fall prevention tool, 16 ...
Fall prevention plate, 16a ... Engaging part, 17 ... Supporting part, 18 ... Engaging body, 18c ... Guide piece, 21 ... Coil spring as biasing member, 30 ... Building scaffolding, 33 ... Scaffolding pipe.

Claims (3)

[Claims] 1. A construction scaffold formed by erection of a plurality of scaffolding pipes and a scaffolding board laid between the scaffolding pipes, wherein a building material or the like placed on the scaffolding board falls. A fall prevention device attached to the scaffolding plate to prevent the fall prevention, which has a plate-like shape and has an engaging portion that engages with an engaged portion formed on the surface of the scaffolding plate at the lower end. Plate, a support portion extending downward from the fall prevention plate, and a lower end portion of a support portion disposed below the fall prevention plate so as to be vertically movable, and engages with a lower end portion of the scaffold plate. Of the engaging portion with respect to the engaged portion, and engagement of the engaging body moved up and down corresponding to the vertical thickness of the scaffold plate with the lower end portion of the scaffold plate. It is characterized in that the fall prevention plate is installed upright on the surface of the scaffolding plate by Scaffolding board fall prevention tool. 2. The scaffolding plate fall prevention tool according to claim 1, wherein the engagement body is supported by the support portion while being biased upward by the biasing force of the biasing member. 3. The upper part of the engaging body is restricted to lock the lower end portion of the scaffolding plate when the engaging body moves upward, and outwardly to guide the upward movement of the engaging body. The scaffold plate fall prevention tool according to claim 1 or 2, wherein an extending guide piece is formed.