JP2781343B2 - Scaffold board structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold plate structure.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 13, a scaffold frame b is constituted by a large number of steel pipe frame members a, and a scaffold plate d shown in FIG. d
I work on the above.

[0003]

However, since the scaffold plate d is made of a steel plate and is heavy in weight and requires physical strength for handling, it is unsuitable at present when workers are aging.

Therefore, in order to reduce the weight, a gap e is provided at the center.
Some of them are opened along the length, but there is a problem that tools and parts fall down from the gap e, which is dangerous.

In order to reduce the weight, a scaffold plate in which a light alloy material is integrally formed with a reinforcing rib or the like by extrusion has been considered. However, due to the nature of the extrusion, the thickness / extrusion width must be reduced.
It could not be less than a certain limit, so that it was not possible to achieve the expected weight reduction.

In order to reduce the weight, a scaffold plate member is formed by bending a light alloy plate material to form a C channel-shaped scaffold plate member with a lip. It is also conceivable to join the side walls to be welded or rivets together to form an integral scaffold plate having a predetermined width, and to make the side walls function as reinforcing ribs to maintain rigidity. Cause weight increase. If the number of side walls is reduced by increasing the width of the scaffold plate member, the gap between the side walls becomes too wide, and a defect occurs in which the center of the scaffold plate is drummed.

[0007] In particular, when a scaffold is made up of a plurality of members of light alloy, a special welding method such as TIG welding or MIG welding must be used to join the members, resulting in a high processing cost. There is.

[0008]

According to the present invention, a scaffold plate is provided.
A left and right scaffold plate side portion and a joint member for connecting the same scaffold plate side portion, and an engaging edge portion whose cross section is bent at an acute angle is formed at one longitudinal end edge of the scaffold plate side portion, and a joint is formed. The member is formed with a joint engaging portion having a substantially M-shaped cross section at both longitudinal end edges, and the scaffold plate side is engaged via the engaging edge and the joint engaging portion, and integrated by pressing. The present invention provides a scaffold plate structure characterized by forming the above scaffold plate.

[0009] A belt-shaped extending band extending outward is integrally formed on an end edge of the joint engaging portion of the joint member.
A bead was formed on the outer edge of the main body side engaging edge, and an engaging edge whose cross section was bent at an acute angle was formed on both longitudinal edges between the scaffold plate sides. The present invention is also characterized in that a widening member is interposed, each scaffold plate side portion is engaged with the widening member via the joint member, and an integrated scaffold plate is formed by pressing.

[0010]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a scaffold plate A1 according to the present invention. The scaffold plate A1 includes left and right scaffold plate sides 1,1, a widening member 2, and joint members 3,3. Each of the above members is formed by extruding a light alloy material.

The scaffold plate side 1 has a side wall 5 suspended from one longitudinal end of an elongated rectangular plate-like upper plate 4 and the lower end of the side wall 5 extends inward to form a lip 6. The engaging edge 7 is formed on the other longitudinal edge.

As shown in FIGS. 1 and 2, the engaging edge 7 is formed by bending the other longitudinal end of the upper surface plate 4 downward to form a narrow joint 8. By forming the engaging tip edge 9 obliquely downward from the lower edge of the engaging edge, the engaging edge 7 whose cross section is bent at an acute angle is formed.

On the lower surface of the upper plate 4, a lower end is provided between the side wall 5 and the engaging edge 7 at a position approximately 2/3 of a distance from the side wall 5 to the engaging edge 7. A reinforcing rib 11 formed with a flange 10 is provided vertically.

The scaffold plate sides 1 are of the same shape having left-right compatibility such that the left and right sides are only turned.

The widening member 2 is engaged with both longitudinal edges of an elongated substantially rectangular widening member upper surface portion 12 having a width of about 2/3 of the scaffold plate A1 in the same shape as the scaffold plate side portion 1. Edges 7 and 7 are formed, and reinforcing ribs 11 having the same shape as above are vertically provided below the center line of the widening member upper surface portion 12 to form a widening member 2 having a substantially T-shaped cross section. .

As shown in FIGS. 2 and 3, the joint member 3 bends the left and right longitudinal edges of the substantially strip-shaped joint member main body 13 obliquely inward and upward to form the joint engaging portions 14, 14. And extending outwardly from the leading edge of each of the joint engaging portions 14 and 14, respectively, to form the joint members 3 having a substantially Ω-shaped cross section.

Then, as shown in FIG. 3, a widening member 2 is interposed between the left and right scaffolding plate side parts 1, 1 so that each joint part 8, 8, 8, 8
The joint members 3, 3 are inserted from one side in a state where they are brought into contact with each other, and the joint edge portions 7, 7, 7, 7, 7 of the scaffold plate side portions 1, 1 and the widening member 2 are inserted. The joint engaging portions 14, 14, 14, 14 of the joint members 3, 3 are engaged, and the scaffold plate side portions 1, 1 engaged in this manner and the engaging edges 7, 7, 7, 7, 7 and joint engaging part 1 of joint members 3 and 3
4,14,14,14 are pressed from above and below by a press,
As shown in FIGS. 4 and 5, the engaging edges 7, 7, 7, 7 of the scaffold plate side portions 1, 1 and the widening member 2 and the joint engaging portions 1 of the joint members 3, 3
4, 14, 14, and 14 are plastically deformed to join the left and right scaffold plate sides 1, 1 and the widening member 2 via the joint member 3 to form an integrated scaffold plate A 1 shown in FIG. 6. doing.

With this configuration, the thickness of the scaffold plate A1 can be reduced to reduce the weight. That is, scaffold plate A1
Can be divided into the scaffold plate side portion 1, the joint member 3, and the widening member 2 and extruded, so that the extrusion width of each member is reduced, and thus the thickness of each member is required and sufficient. It can be reduced to the thickness.

Further, since the scaffold plate side portions 1 have the same shape which is interchangeable only in the right and left directions, only one extrusion die (extremely expensive) for the scaffold plate side portions 1 is required. Therefore, it is advantageous in terms of cost.

When assembling the scaffold plate A1, the scaffold plate side 1
The joining portion 8 is formed at the butting portion of the joint member 3 with the widening member 2, although the width is narrow, the alignment is easy, and the extension bands 15, 15 prevent the joint member 3 from being twisted. Since the extension band portions 15, 15 function as guides for engaging the joint member 3 with the engagement edge portions 7, 7, the above-mentioned engagement work can be facilitated.

Further, since the respective members are joined by using a press, a special welding such as TIG or MIG or a large number of tacking operations are not required, so that the processing cost can be reduced.

Further, since the engaging edge 7 on the side of the scaffold plate 1 and the joint engaging portion 14 are both bent at an acute angle, separation of the two is prevented only by engaging them. Processing such as movement and positioning before pressing is facilitated, and when pressed, the engaging edge 7 and the joint engaging portion 14 are always bent in a predetermined direction, so that processing reliability can be improved.

Further, since the extending band portions 15 and 15 are formed outwardly from the distal end edges of the joint engaging portions 14 and 14 of the joint member 3, the joint member 3 is formed by press working or a load during use.
Can be prevented from expanding, and the bonding strength of each member can be increased.

Further, by forming the lip portion 6 and the flange 10 at the lower ends of the side wall 5 and the reinforcing rib 11 of the widening member 2, respectively, the strength and rigidity of the side wall 5 and the reinforcing rib 11 can be increased. Further, it can function as a mounting portion for the below-described lower plates 20, 21, 22.

In addition, the reinforcing rib 11 is provided on the side 1 of the scaffold plate.
The widening member 2 is located at the center of the widening member 2 having a lateral width of about 2/3 of the scaffold plate A1 at a position about 2/3 of the distance from the side wall 5 to the engaging edge 7. When these are combined, the reinforcing ribs 11 are arranged at equal intervals, so that the distribution of strength and rigidity of the scaffold plate A1 can be rationalized, and drumming of the upper surface plate 4 can be prevented ( See FIG. 6).

FIG. 7 shows that two widening members 2 are interposed between the left and right scaffold plate sides 1, 1 so that each of the scaffold plate sides 1, 1 and the widening members 2, 1.
2 are engaged with each other via the joint members 3, 3, 3, 3 to form a wide scaffold plate A1 by pressing, and a further widened scaffold plate A2 is shown. Reinforcing rib 11
Are arranged at equal intervals.

FIG. 8 shows that the side portions 1, 1 of the scaffolding plate are directly connected via the joint member 3 without using the widening member 2.
A scaffold plate A3 having a narrow width is formed.

FIGS. 9 to 11 show the strength of the scaffold plates A1, A2, A3 with the undersurface plates 20, 21, 22 stretched under the scaffold plates A1, A2, A3 to form the scaffold plates A1, A2, A3 in a box girder shape. And increased rigidity,
The left and right ends of the lower plates 20, 21, and 22 are connected to the lip portions 6 of the side portions 1 of the scaffold plate.
Then, the upper surfaces of the lower plates 20, 21, and 22 are
And are integrally fixed by blind rivets or the like.

FIG. 12 shows an engaging edge 71 and a joint member 31 according to another embodiment. The engaging edge 71 has a cross section substantially protruding upward from the distal end of the engaging distal edge 9. Along with forming a semicircular bead 72, a joint engaging portion 34 bent inward at the opening edge is formed to form a joint member 33 having a substantially C-shaped cross section, and these are engaged. By pressing the bead 72 into the joint engagement portion 34 when pressed, the scaffold plate side 31
And the joint member 33 are strengthened.

[0031]

According to the present invention, the scaffold plate is constituted by the scaffold plate side and the joint member for joining the scaffold plate side, and the cross section is formed at one longitudinal end of the scaffold plate side by an acute angle. The joint member is formed with a bent joint edge, and the joint member is formed with a joint engagement portion having a substantially M-shaped cross section at both longitudinal end edges, and the scaffold plate side is jointed with the main body side edge. By engaging with each other via the portion and forming the integrated scaffold plate by pressing, it is possible to reduce the weight of the scaffold plate and reduce the processing cost.

Further, since the scaffold plate side portions have the same shape having compatibility only by changing the direction on the left and right sides, only one extrusion die (extremely expensive) for the scaffold plate side portion is required. It is advantageous in terms of cost.

In addition, since the band-shaped extension band extending outward is integrally formed on the edge of the joint engaging portion of the joint member, the opening of the joint member can be locally expanded. Thus, the bonding strength of each member can be increased.

A widening member having an engaging edge whose cross section is bent at an acute angle is provided between both longitudinal edges between the above-mentioned scaffold plate side portions, and each of the scaffold plate side portions and the widening member are connected to each other. By engaging through the joint member and forming an integrated scaffold plate by pressing, a scaffold plate having a desired width can be formed by the same processing method as described above.

In addition, since a bead is formed on the outer edge of the main body side engagement edge, when pressed, the bead bites into the joint engagement portion to increase the bonding strength of each member. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of a side portion of a scaffold plate and a widening member constituting a scaffold plate according to the present invention.

FIG. 2 is a sectional view of a joint member.

FIG. 3 is a perspective view showing a procedure of assembling the scaffold plate.

FIG. 4 is a cross-sectional view showing shapes of an engagement edge portion and a joint engagement portion during press working.

FIG. 5 is a cross-sectional view showing shapes of an engagement edge portion and a joint engagement portion after pressing.

FIG. 6 is a perspective view of a scaffold according to the present invention.

FIG. 7 is a perspective view of a wide scaffold plate.

FIG. 8 is a perspective view of a narrow scaffold.

FIG. 9 is a cross-sectional view of a scaffold plate on which a lower plate is stretched.

FIG. 10 is a cross-sectional view of a wide scaffold plate having a lower surface plate stretched.

FIG. 11 is a cross-sectional view of a narrow scaffold plate having a lower surface plate stretched.

FIG. 12 is a cross-sectional view showing the shapes of an engagement edge portion and a joint engagement portion of another embodiment.

FIG. 13 is a perspective view of a scaffold frame.

FIG. 14 is a plan view of a conventional scaffold.

[Explanation of symbols]

 A1 Scaffolding board 1 Scaffolding board side 2 Widening member 3 Joint member 7 Engagement edge 14 Joint engagement portion 15 Extension band 72 Ball

Claims (4)

(57) [Claims] 1. A scaffold plate A1 is connected to left and right scaffold plate sides (1) (1).
And a joint member (3) connecting the scaffold plate side portions (1) and (1), and the cross section of the scaffold plate side portions (1) and (1) was bent at an acute angle to one of the longitudinal edges. An engaging edge (7) is formed, and the joint member (3) has a joint engaging portion (14) (1
4) is formed, and the scaffold plate side portions (1) and (1) are engaged via the engaging edge (7) and the joint engaging portions (14) and (14), and the integrated scaffold plate is pressed. A scaffold plate structure characterized by forming (A1). 2. A belt-like extending band (15) extending outwardly from an end of a joint engaging portion (14) of a joint member (3). Scaffold plate structure as described. 3. A widening member (2) in which engaging edge portions (7) (7) whose cross sections are bent at acute angles are formed on both longitudinal edges between the scaffold plate side portions (1) (1). Each scaffold plate side (1) (1) and the widening member (2) are engaged via the joint members (3) (3), and the integrated scaffold plate (A2) is pressed. The scaffold plate structure according to claim 1, wherein the scaffold plate structure is formed. 4. A bead (7) is formed on the outer edge of the engagement edge (7).
2. The scaffold plate structure according to claim 1, wherein 2) is formed.