JPH0620741U - Foldable external scaffolding unit - Google Patents

Abstract

(57) [Summary] (Modified) [Objective] The present invention relates to a foldable external scaffolding unit that can be used in general construction and civil engineering work, and is a lightweight and structurally stable external scaffolding unit. The purpose is to be able to provide a unit. [Configuration] A horizontal surface member 4 having gusset plates 6 and 5 projecting from both ends and the center of each of two sides in the longitudinal direction.
Are provided so as to face each other so that the projecting directions of the gusset plates 6 and 5 face each other, and the two horizontal surface members 4 can be expanded and contracted from one end gusset plate 6 to the other central gusset plate 5. A column 10 which can be folded in the middle is pivotally attached between horizontal plane members 4 in the vicinity where the diagonal members 7 intersect each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foldable outer scaffolding unit that can be used in general construction and civil engineering work.

[0002]

[Prior art]

 Conventionally, there is a foldable accordion scaffold in which two horizontal planes, which replace the work floor, are provided facing each other, and these horizontal planes are pivotally connected by link pillars that can be folded or collapsed.

[0003]

[Problems to be solved by the device]

 However, in this accordion scaffold, link pillars that play a role of vertical load are placed on both sides of the work floor. Since the working floor is as long as 3.6 m, it is easy for the working floor to bend when a load is applied to the center of the working floor. This phenomenon was prominent when the work floor members were made smaller in cross section or expanded metal materials were used for the floor materials in order to reduce the weight of the accordion scaffold as a whole. In addition, the handrail bar that spans between the link pillars was used to bear a horizontal load or to serve as a handrail for the worker. It was easy to use, and it was not enough to bear the horizontal load, and it was unsafe to use as a handrail.

[0004]

[Means for Solving the Problems]

 Therefore, in order to eliminate the above-mentioned drawbacks, the present invention provides horizontal surface members having gusset plates projecting at both ends and the center of the edge, and the horizontal surface members are opposed to each other such that the projecting directions of the gusset plates face each other. The two horizontal plane members are pivotally connected to each other by a diagonal member that can expand and contract from one end gusset plate to the other central gusset plate, and between the horizontal plane members near the intersection of the diagonal members. The purpose of the present invention is to provide a unit for a foldable external scaffold, which is characterized by pivoting a column that can be folded in the middle.

An embodiment of the present invention will be described below with reference to the drawings. A beam (2) is rigidly joined to a frame member composed of a beam (1), and an expanded metal (3) is installed on the beam. A horizontal plane member (4) is provided, and a central gusset plate (5) and both end gusset plates (6) are projected on the longitudinal girder (1) of the horizontal plane member (4). Two horizontal plates (4) are provided facing each other such that the projecting directions of the respective gusset plates face each other, and the diagonal members are arranged from one end gusset plate (6) toward the other central gusset plate (5). (7) Connect pivotally. The diagonal member (7) is a double tube consisting of an inner tube and an outer tube and is expandable and contractible. The fitting margin of the double pipe is a portion where the inner pipe and the outer pipe are fitted with each other, and within the range, a bar that can be pressed against the abutting interface between the inner pipe and the outer pipe by a spring force. A hooking device (9) incorporating (8) is installed. In the vicinity of four sets of intersections in which two diagonal members (7) intersect in two directions, pillars (10) that can be folded in the middle are erected, and both ends thereof are pivotally attached to the upper and lower horizontal plane members (4). The pillar (10) that can be folded inside has a round pipe as a main body, and a hinge part (11) is installed at a substantially central portion, and the main body of the pillar (10) is vertically moved by sliding operation. Then, at its lower limit, a protect tube (12) covering the hinge part (11) is attached. The protect tube (12) has an L-shaped retaining groove (14) that temporarily engages with the retaining projection (13) projecting from the main body of the column (10) at the upper limit of vertical movement. To provide. The retaining groove (14) engages with the retaining protrusion (13) projecting from the main body of the column (10) to temporarily drop the protective pipe (12) toward the hinge (11). This is to prevent it. The lower limit position of the protect tube (12) is determined by the lower end of the protect tube (12) contacting the flange (15) installed on the main body side of the column (10).

The method of using the unit of the foldable external scaffold is as follows: the bar (8) of the hooking device (9) of the diagonal member (7) is pulled out, and the protect pipe (9) attached to the pillar (10) is used. 12) While sliding the latching protrusion (13) of the pillar (10) into the vertical groove of the latching groove (14), slide it further upward and rotate the protect pipe (12) at the upper limit. When the hooking protrusion (13) is fitted in the lateral groove of the hooking groove (14), the diagonal member (7) can be expanded and contracted, and the hinge portion (11) can be bent. The upper and lower horizontal plane members (4) are folded in the horizontal plane. When the upper and lower horizontal plane members (4) are unfolded, the hooking device (9) of the slant member (7) is used, and the hinge portion (11) of the pillar (10) is covered with the protect pipe (12). , The unit itself will be a kind of lattice beam and will be a structure that can bear vertical load and horizontal load. Since the diagonal members spread out in the opening like a brace, they can also be used as handrails.

[0007] A plurality of foldable external scaffolding units of the present invention are connected in an upward direction and a lateral direction, and a group of these connected units is level-adjusted and installed around the root of a building under construction. The wire is hooked on the horizontal surface material (4) and pulled up by a crane, stretched and deployed along the side wall of the building under construction, and finally used as an external scaffold.

[0008]

[Effect of device]

 As a result, this unit has a lattice structure in which the columns and diagonal members are arranged, so that a unit that is a structurally stable external scaffold can be provided. Therefore, the cross section of the member can be small, and in combination with the adoption of expanded metal, the weight reduction can be further promoted. Allowable loading weight of material on horizontal surface material can be increased.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a front view showing a use state as an external scaffold.

[Explanation of symbols]

 1 Large beam 2 Small beam 3 Expanded metal 4 Horizontal surface material 5 Central gusset plate 6 Both ends gusset plate 7 Slanting material 8 Bar bar 9 Locking device 10 Pillar 11 Hinge part 12 Protect pipe 13 Locking protrusion 14 Locking groove 15 Flange

Claims (1)

[Scope of utility model registration request] 1. A horizontal surface member having gusset plates protruding from both ends and the center of the edge is provided so that the horizontal surface members face each other such that the projecting directions of the gusset plates face each other, and the two horizontal surface members. Is pivotally connected from one end gusset plate to the other central gusset plate by a diagonal member that can expand and contract, and a column that can be folded in the middle is pivotally attached between horizontal plane members near the intersection of the diagonal members. Foldable external scaffolding unit characterized by