Column structure of the work platform

Abstract

To solve the problem in which, bracing of a column structure of working gantry conventionally has a structure in which a horizontal bracing and a diagonal material, which are stress materials, are connected to a vertical column, but connection construction took a long time.SOLUTION: A column structure includes a first stress material, a second stress material, a third stress material and a first vertical column and a second vertical column. The three stress materials are pin-joined so as to rotate in the same flat surface at a central nodal point. The first stress material is pin-joined to the first vertical column so as to rotate in the flat surface at a first nodal point, the second stress material is pin-joined to the second vertical column so as to rotate in the flat surface at a second nodal point, and the third stress material is pin-joined to the second vertical column so as to rotate in the flat surface at a third nodal point. When a distance from the first nodal point to the central nodal point is defined as A, a distance from the second nodal point to the central nodal point is defined as B, a distance from the third nodal point to the central nodal point is defined as C, and an interval between the first vertical column and the second vertical column is defined as D, a relation of A+B>D and C<D is established.SELECTED DRAWING: Figure 1

Claims

1. A column structure for a work platform, comprising a first stress member, a second stress member, and a third stress member, as well as a first vertical column and a second vertical column, The three stress members are pin-joined at the central node so that they can rotate within the same plane. The first stress member is pin-joined to the first vertical column at the first node so as to be rotatable within the plane, The second stress member is pin-joined to the second vertical column at the second node so as to be rotatable within the plane, The third stress member is pin-joined to the second vertical column at the third node so as to be rotatable within the plane, When the distance from the first node to the central node is A, the distance from the second node to the central node is B, the distance from the third node to the central node is C, and the distance between the first vertical column and the second vertical column is D, The relationship A + B > D and C < D holds true. The first stress member has one end that constitutes the central node and the other end that constitutes the first node, The second stress member has one end that constitutes the central node and the other end that constitutes the second node, and The third stress member has one end that constitutes the central node and the other end that constitutes the third node, The pin joints of the central node and the first to third nodes comprise a retainer, a pin shaft, and a bearing, the pin shaft is mounted perpendicular to the plane in the retainer, the pin shaft is rotatably inserted into the bearing, and the ends of the first to third stress members are connected to the bearing. A column structure in which, in the pin joint at the first to third nodal points of the first to third stress members, the retainer is fixed to the first or second vertical column, the pin shaft is mounted on the retainer, the bearing is radially divided and can be externally fitted onto the pin shaft, and an adjuster is provided between the bearing and the first to third stress members so that the distance between the bearing and the other end of the first to third stress members can be adjusted.

2. A first step of forming the column structure described in Claim 1 on the first vertical stage of the work platform, A method for manufacturing a column structure for a work platform, comprising a second step of forming the column structure on the second vertical stage of the work platform, The second stage is a method for manufacturing a column structure of a work platform located above the first stage.

3. The column structure according to Claim 1, comprising the first step of pin-joining the first to third stress members at the central node, The second step involves joining the other ends of the first to third stress members, which are pin-joined at the central node, to the first or second vertical column, A method for manufacturing a column structure of a work platform equipped with a work platform.

4. The manufacturing method according to claim 3, wherein the second step is performed on the first to third stress members suspended from the upper edge of an existing work platform.

5. A length adjustment box is further provided, which is connected to the steel material constituting the first to third stress members. The adjustment box is divided into a first box piece and a second box piece, the first box piece having a first inclined surface and the second box piece having a second inclined surface, and the first inclined surface and the second inclined surface are slidable in the axial direction of the steel material. Furthermore, the column structure according to claim 1 is provided with a restraining part that restrains the sliding between the first slope and the second slope.

6. The column structure according to claim 5, wherein the stress applied in the axial direction is absorbed by the first and second inclined surfaces and the restraining portion.

Images