JPH0225867Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a suspended scaffold used in construction work, etc., and in particular relates to an improvement of a hanging support that supports a foldable scaffold board portion.

[Conventional technology]

Suspended scaffolding is attached to the upper flange of a beam steel frame using mounting hardware such as a catch base, and has the advantage of not requiring large-scale scaffold assembly work and taking up less space.

There are various types of such suspended scaffolding, but if the entire suspended scaffolding can be folded when not in use,
Setting and storing operations can be performed easily and quickly.

For example, the one disclosed in US Pat. No. 2,184,457 is also an example.

[The problem that the idea attempts to solve]

When the entire scaffold is folded as shown in US Pat. Two points must be satisfied.

Regarding the first point, U.S. Patent No. 2,184,457
In the publication, the rotating scaffolding board part is supported in a horizontal state by a hanging brace made of bar-shaped rigid material, but the vertical member that pivotally supports the upper end of this hanging brace is relatively short, and the hanging brace itself is Short and unstable.

In addition, the lower end of the suspension strut is fixedly pivoted to the lateral front end position of the scaffolding board, so when folding it from the unfolded state, when the scaffolding board is rotated and raised, the upper end of the suspension strut will move. It slides together with the scaffolding board using the pivot point as a guide. In this way, both the scaffolding board part and the suspension support must be moved synchronously, and there is resistance from each part, resulting in poor folding operability.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
When unfolded, the scaffolding board can be stably supported by long hanging supports, and since the hanging supports and the scaffolding board do not engage in a fixed manner except when unfolding, the scaffolding board can be folded smoothly without resistance. To provide a hanging scaffold that can be folded and compactly folded.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention installs the rear end of the scaffolding board and the rear end of the horizontal U-shaped frame-shaped handrail on the inner wall of the post, which has a U-shaped cross section with the front side of the rear vertical fixed frame as an open surface. A handrail support that stands up by pivoting from the front surface of the scaffold board is pivoted to the front of the handrail, and the upper end of the channel-shaped suspension support is pivoted to the outside wall above the handrail installation position in the fixed frame support. However, the vicinity of the shaft attachment part of the suspension support is curved, the remaining straight part is placed close to the outside of the handrail so as to intersect with the handrail, and a scaffold board support part is provided at the lower end, and the scaffold board side The gist is that the wheels provided at the front end are engaged within the suspension support.

[Effect]

According to the present invention, the scaffolding board that unfolds and becomes horizontal is
It engages with the scaffold plate receiving portion at the lower end of the suspension support and is supported by this suspension support. The hanging support extends from near the upper end of the rear vertical fixed frame, which extends upward from the handrail attachment position, to the lateral front end of the scaffolding board while curving, so the truss supporting the scaffolding board can be made large. , it is highly reliable in terms of strength and provides a great sense of security to the user. In addition, the hanging support material is placed close to the outside of the handrail and intersects with the handrail, thereby preventing deformation of the handrail, and combining with the handrail to form a shelf, further increasing the sense of security given to the user.

To fold the scaffolding board after use, flip the scaffolding board up and rotate it to release the engagement with the scaffolding board support, and the hanging support can also be folded with the front of the rear vertical fixed frame using the pivoting part at the upper end as the fulcrum. The suspension supports and scaffolding boards will overlap the pillars, which have an open surface and a U-shaped cross section, but the movement of the suspension supports and scaffolding boards can be linked with the wheels without resistance.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 is a partially cutaway front view showing an embodiment of the hanging scaffold of the present invention, Figure 2 is a perspective view of the same as above, and Figure 3 is a partially cutaway enlarged side view. A rear vertical fixed frame 1 is formed by fixing an appropriate number of horizontal bars 1b, 1b' to columns 1a, 1a' having a U-shaped cross section. In this case, the middle horizontal bar 1b' is attached to the support post 1b' so that it does not become an obstacle when the handrail body 10, which will be described later, is folded.
a, 1a' and at intervals that match the walking width so as to serve as a ladder when moving from the suspended scaffold to the beam steel frame. And the support 1 of the fixed frame 1
A portion of a baseboard 5 erected around the scaffolding board 4 is pivoted to the inner wall at the lower end of a, 1a' with bolts or pins 6. In this case, in order to enable the scaffolding board 4 to be folded parallel to the supports 1a and 1a',
A bracket 18 is provided so as to protrude upward from the baseboard 5, and the bracket 18 is pivoted to the inner wall portions of the columns 1a, 1a'. The baseboard 5 constitutes a rectangular frame, and the shaft attachment portions are on both sides of the rear corner of this frame.

Further, a handrail post 8 is provided by pivoting the front sides of horizontal U-shaped frame-shaped handrails 7a, 7a' of multiple levels (two levels in the illustration) above and below from the baseboard 5 on the front surface of the scaffold board 4.
a, 8a'.

The U-shaped handrails 7a, 7a' and the handrail supports 8a, 8
a' to form a handrail body 10 for preventing falls, and the U-shaped handrails 7a, 7a' are bent upward at the side connected to the pillars 1a, 1a', and the front end side is narrow. is formed.

In addition, handrails 7a, 7a' and handrail supports 8a, 8
For a', it is preferable to have an oval shape with a hollow part because it is lightweight, but it is also possible to use a solid one.
a and 8a' are pivotally connected via a bracket 14.

The rear ends of the handrails 7a, 7a' are inserted into the interiors of the columns 1a, 1a' with their openings facing forward, and are pivoted to the inner walls with pins 9.

Further, the front part of a rotating grip 22 for pulling up and folding the scaffold board 4 and the handrail body 10 is rotatably attached to the center of the front side of the upper handrail 7a with a pin 21 via a bracket 20. In this case, the bracket 20 is long enough to protrude from the upper and lower ends of the handrail 7a, and the pin insertion holes provided in the bracket are also elongated holes 24 that protrude from the upper and lower ends of the handrail, and the pins 21 are made to protrude from the upper and lower ends of the handrail. to be able to move into position.

The rotating gripping rod 22 has a length such that when the rod 22 is rotated upward, the end thereof at least comes into contact with the horizontal crosspiece 1b of the rear vertical fixing frame 1, and the end thereof is placed in the center of the front side of the baseboard 5. A rotating grip lever receiver 23 is provided to prevent and receive the swinging of the rotating grip lever 22 from side to side when the rotating grip lever 22 is hung down.

Note that the rotating grip 22 is not limited to the shape shown in the drawings, and the two fork portions of the Y-shape can be attached to the handrail 7.
It may be pivoted to the front side of a, or one end may be attached to the horizontal bar 1.
The other end of a cable such as a chain that can be hooked to the handrail 7a may be attached to the handrail 7a.

In addition, left and right baseboards 5 located on the sides of the scaffolding board 4
Wheels 11 are provided on both sides of the front part of the
are engaged in hanging supports 13, 13' whose upper ends are pivoted with pins 12 inside the upper parts of the columns 1a, 1a' of the fixed frame 1.

The hanging supports 13, 13' are made of a channel material having a mortar-shaped cross section, which is a rectangular hollow member provided with opposing legs whose tips are bent inward, and whose upper end is curved. The axle 11a of the wheel 11 moves through the slit 13a of the suspension supports 13, 13'. In addition, as shown in FIG. 5, hanging supports 13,
A pin 16 for preventing the wheel 11 from being pulled out is provided at the lower end of the pin 13', and a protrusion 15 for receiving and supporting a scaffold board is provided slightly below the pin 16 facing inward.

Reference numeral 19 indicates a suspension support provided at the lower end of the support columns 1a, 1a'.

In this way, when the present invention is expanded, the hanging supports 1a and 1a' and the baseboard 5 are at right angles to each other.
3 and 13' are curved from the upper end shaft attachment part, and beyond that they extend linearly and are installed diagonally, and the scaffold board 4 and baseboard 5 are placed on the protruding part 15. . As in the illustrated example, hanging supports 13, 13'
is located close to the outside of the handrails 7a, 7a' so as to restrain the lateral movement of the handrails 7a, 7a', and intersects with the handrails 7a, 7a'.

Each component of the scaffold of the present invention becomes lightweight when aluminum is used.

Next, usage and operation will be explained.

When not in use, the scaffold of the present invention is folded as shown in FIG. 4. In this case, first push the lower end of the rotating grip 22 forward to remove it from the grip holder 23. Next, the rotation grip 22 is rotated and pulled up so that the pin 21 of the rotation grip 22 moves through the elongated hole 24 until the pin 21 protrudes from the upper end of the handrail 7a, and the rotation grip 22 is rotated to the position shown by the chain line in FIG. Active grip 22
cause. Then, from the top of the scaffolding board 4,
Put your foot on b', climb onto the beam steel frame (shown by the chain line), and pull up the rotating grip 22 further upwards.
The pivoted parts a and 8a' rotate, and the handrail body 10 approaches the frame 1, and the side parts are folded in parallel with each other according to the principle of a parallelogram. In this case, the U-shaped handrail 7a , 7a' are made narrower so that it is possible to avoid overlapping of the two, and when the side connected to the columns 1a, 1a' is bent upward, the handrail body 10 is connected to the column 1.
Since it can be folded in parallel with a and 1a', the handrail body 10 can be folded into a flat shape. At this time, the wheels 11 roll within the suspension supports 13, 13', and those located at the bottom move upward. As the wheel 11 moves, the hanging supports 13, 13'
In this case, the upper ends of the suspension struts 13, 13' are curved and a suspension support 19 is provided at the lower ends of the struts 1a, 1a', so that , support column 1a,1 of frame 1
It can be folded completely parallel to a′.

After folding, the rotating grip 22 is pushed forward to move through the elongated hole 24 until the pin 21 protrudes from the lower end of the handrail 7a, and then rotated downward to make it parallel to the frame 1. Can be done.

As a result, unlike when the hanging supports are configured in a straight line, a folded scaffold with as few protruding parts as possible is
Since it is flat and thin overall, it does not take up much storage space.

Next, in order to unfold it for use, perform the reverse operation of the folding process to return it to the state shown in FIG.
It stops at the protrusion 15. In this state, the scaffolding board 4 and the baseboard 5 are in a horizontal state, and are suspended in a truss-like manner not only through the lower ends of the supports 1a and 1a' but also through the protruding portions 15 of the hanging supports 13 and 13'. .

In order to attach the scaffold of the present invention expanded in this way to the flange on the steel frame, it is sufficient to fix the columns 1a and 1a' to the flange surface using known mounting hardware 17.
It is also possible to first fold it, attach it to the steel frame, and then unfold it.

[Effect of idea]

As mentioned above, the suspended scaffold of the present invention is designed to be foldable when not in use, and when it is unfolded during use, the part of the scaffolding plate that bears the most load is both the fixed frame, which is the supporting part, and the hanging support. It can be supported in a truss-like manner, and the fixed frame is vertically long and extends upwards, and the suspension supports can also be lengthened accordingly, allowing the truss to be large, providing high strength and reliability, and giving the user a sense of stability. It is something that can be given.

Furthermore, since the hanging supports are placed close to the outside of the handrail and intersect with the handrail, they prevent deformation of the handrail when a load is applied to the handrail, and combine with the handrail to form a shelf for use. The sense of security that can be given to people can be further increased.

In addition, since the suspension support and the scaffolding board do not engage in a fixed manner except when unfolding, even if the scaffolding board is rotated so as to flip up when the scaffolding board is folded,
The suspension support does not have a low resistance, can be folded smoothly, and can be folded together with the handrail completely parallel to the support of the fixed frame, making it compact.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view showing an embodiment of the hanging scaffold of the present invention, Figure 2 is a perspective view of the same as above, Figure 3 is an enlarged side view with a partially cutaway, and Figure 4 is an enlarged view of the suspended scaffold in its folded state. FIG. 5 is a side view of the main part, and FIG. 6 is a sectional view of the main part of the scaffold board. 1... Rear vertical fixed frame, 1a, 1a'... Support, 1
b, 1b'... Horizontal beam, 4... Scaffolding board, 5... Baseboard, 6... Pin, 7a, 7a'... U-shaped handrail, 8a, 8a'... Handrail post, 9... Pin, 10... Handrail body, 11 ...Wheel, 1
1a...Axle, 12...Pin, 13, 13'...Hanging support material,
13a...Slit, 14...Bracket, 15...Protrusion, 16...Pin, 17...Mounting hardware, 18...Bracket, 19...Hanging support support, 20...Bracket,
21... Pin, 22... Rotating grip, 23... Rotating grip receiver, 24... Long hole.

Claims (1)

[Scope of utility model registration request] The rear part of the scaffolding board and the rear end of the horizontal U-shaped handrail are each pivoted to the inner wall of the post, which has a U-shaped cross section with the front side of the rear vertical fixed frame open, and the scaffolding board is pivoted from the front side. A handrail support that rises up is pivoted to the front of the handrail, and the upper end of a channel-shaped suspension support is pivoted to the outside wall above the handrail installation position in the fixed frame support, and the pivoting portion of the suspension support is pivoted. The vicinity is curved, the remaining straight part is placed close to the outside of the handrail so as to intersect with the handrail, and a scaffold board support is provided at the lower end,
Furthermore, a suspended scaffold is characterized in that a wheel provided at the lateral front end of the scaffold board is engaged within the suspension support.