JP-7856255-B2 - Slide form

Inventors

• 藤見 晶
• 倉光 健太朗
• 藤田 仁
• 松浦 健太郎

Assignees

• 株式会社大林組
• 北陸鋼産株式会社

Dates

Publication Date

20260511

Application Date

20211014

Claims (1)

1. It is a slide form with a center of gravity, Formwork section for concrete pouring, The system comprises a connecting portion that can be connected to an external lifting device, and a lifting jig that has a changing mechanism to change the relative position between the connecting portion and the center of gravity, and is swingably connected to the formwork portion, The aforementioned suspension jig further includes a support member that supports the connecting portion and the changing mechanism, The aforementioned modification mechanism includes a weight and a moving part that moves the weight along the support member. The aforementioned movable part is Pulley and, A wire is stretched across the pulley and connected to the weight, A drive unit that drives the aforementioned wire, Slide form.

Description

This invention relates to a slide form. When pouring concrete for the walls and other surfaces of structures, the use of slide forms has been a conventional practice (Patent Document 1). Japanese Patent Publication No. 2009-209613 This is a cross-sectional view of a tunnel with a slide form installed according to the embodiment, showing the progress of concrete lining pouring in the order of Figures (a) and (b).This is a cross-sectional view of the tunnel in the embodiment.This is a slide form in an embodiment, showing it in a state where it has been lifted by a crane.This figure shows the slide form in an axial view in the embodiment.This is a right side view of the formwork portion in the embodiment.This is a top view of the lifting jig in the embodiment.This is a cross-sectional view taken along the line VII-VII in Figure 6.This is an enlarged view of the motor and winch in the embodiment.This is a modified slide form, showing the state in which it is lifted by a crane. <Overview> Referring to Figures 1 to 8, a slide form 1 according to an embodiment of the present invention will be described below. The slide form 1 is a member used as formwork when pouring concrete into a structure such as a wall. In this embodiment, the slide form 1 is installed inside a tunnel T and used for pouring the tunnel lining concrete. The slide forms 1 are arranged in a line along the axial direction of tunnel T within the tunnel T and suspended by crane C (Figure 2). In the following explanation, the axial direction, vertical direction, and left-right direction (perpendicular to the axial direction) are defined and used in the explanation, as shown in each figure. While slide forms 1 are positioned on both the left and right sides of tunnel T, the following explanation uses the case where they are positioned on the left side as the basis. As shown in Figure 3 and other figures, the slide form 1 comprises a formwork section 2, scaffolding 3, a lifting jig 4, and braces 5 and 6. The formwork section 2 is a component that functions as the formwork for the wall surface and as a support for the formwork during the pouring of the lining concrete wall. As shown in Figures 3 to 5, the formwork section 2 comprises a flat plate-shaped formwork 21 that contacts the concrete during pouring, and three support members 22 that support the formwork 21. The formwork 21 is arranged to extend axially and substantially vertically along the wall surface of the lining concrete. The support members 22 are steel members that extend substantially vertically along the formwork 21 and are fixed to anchors A (anchor A located at the bottom in Figures 1(a), 3 to 5) embedded in the wall of the tunnel T. The scaffolding 3 is a component that forms a workspace for workers. As shown in Figures 3 and 4, it comprises planks 31 forming the work platform, beams 32, columns 33, upper columns 34, crossbars 35, and braces 5. Workers move to the scaffolding 3 via elevators or external scaffolding. Note that, for ease of understanding, the elevators inside and outside the scaffolding 3 are omitted from Figures 3 onward. The planks 31 are rectangular flooring materials with their longer sides extending in the axial direction, and are installed between multiple beams 32. The planks 31 are made of materials such as checkerboard or expanded metal. The beams 32 are rod-shaped steel members extending in a direction intersecting the formwork 21, and are arranged in parallel in groups of three at the top, bottom, and middle of the support members 22. Each beam 32 has one end 32A and the other end 32B. The one end 32A is pin-connected to the support member 22 and is rotatable vertically, while the other end 32B is pin-connected to the column 33. The column 33 is a rod-shaped steel material extending approximately vertically, and its upper and lower ends are pin-connected to the other end 32B. The upper column 34 is a rod-shaped steel member extending approximately vertically, and its lower end is rigidly connected to the upper end of the other end 32B. The crossbars 35 are steel members such as angle steel extending in the axial direction. Multiple crossbars are arranged vertically at approximately equal intervals and fixed to the columns 33 and the upper column 34. The crossbars 35 have the function of preventing workers from falling. As described above, the beam 32 and column 33, and the formwork section 2 and beam 32 are pin-connected to each other. Therefore, the formwork section 2 and scaffolding 3 can swing up and down, as shown by the arrows in Figure 4. During swinging, the formwork section 2 and scaffolding 3 maintain a parallelogram shape in their external form when viewed along their axial direction. The brace 5 is a rod-shaped member that connects the other end 32B to the support member 22, and has the function of restraining and restricting the movement of the other end 32B (Figures 3 and 4). In this embodiment, the brace 5 is a turnbuckle that generates a react