JPH0347074Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention relates to a spacing support device for concrete wall double-sided formwork.

``Conventional technology'' Conventional double-sided concrete wall formwork involves establishing one formwork, attaching a separator (spacer) to it, and then drilling bolt holes in the same position as the separator on the other formwork ( Established a Kaeshi wall),
It supported both formworks at a constant distance by tightening spacers (Utility Model Application No. 100946/1983). Therefore, the work process (positioning and drilling of bolt holes, etc.) and the installation process of the return wall required skill and time until the other formwork (return wall) was formed, and there was a defect that made it difficult to improve work efficiency.

``Problems to be Solved by the Invention'' This invention aims to provide a form spacing support device that can be used to easily and quickly set up double-sided formwork for concrete walls without requiring any skill.

``Means for solving the problem'' This proposal forms a plurality of notched grooves at the tip of a large-diameter female screw so that the tip can expand and contract in the radial direction, and a check protrusion is attached to the outside of the tip. A formwork spacing consisting of a formwork separator with a flange at the base end of the screw, a bolt hole drilled in the center of a closing fitting that is screwed into the screw, and a formwork separator with one end inserted into the hole. It is constituted by a support device.

"Function" Therefore, first, both concrete wall double-sided formworks 8, 8 are established on the foundation, and one formwork 8 is provided with a large-diameter through hole 1.
3 is drilled using a drill using a large diameter cylindrical bit. Thereafter, bolt holes 14 are drilled into the other formwork 8 through the same large-diameter through-holes 13 using a small-diameter drill.
Then, the large-diameter female screw 1 is fitted into the large-diameter through-hole 13 by tapping against the radial elasticity of the tip from its tip, and the check protrusion 3 is engaged with the inner surface of the same mold frame 8. The flange 4 is in contact with the outer surface of the mold frame 8, and the screw 1 is fixed to the inner circumference of the large-diameter through hole 13 in the axial direction.
Then, insert the separator 7 of both formworks 8, 8 into the inside of the screw 1 from the outside, insert the tip of the separator 7 into the bolt hole 14 of the other formwork 8, and insert the nut 11 into the bolt 10 from the outside. The separator 7 is fixed to the formwork 8 by screwing together. Thereafter, the bolt 10 of the separator 7 protruding outward from the screw 1 is inserted into the bolt hole 6 of the closing fitting 5, and in this state, the outer peripheral male screw of the closing plate 5 is screwed into the screw 1, and the screw 1 is tightened. A nut 11 is screwed from the outside onto the bolt 10 of the separator 7 which is closed and protrudes to the outside of the closing fitting 5, thereby fixing the formworks 8, 8 and supporting the gap between them.

``Example'' By forming a plurality of notch grooves 2 in a direction parallel to the central axis at the tip of a large-diameter female screw 1 made of steel, the tip can be elastically expanded and contracted in the diametrical direction. be. There is a check protrusion 3 facing outward at the tip.
A flange 4 is provided at the base end, and the distance between the inner surface of the flange 4 and the inner surface of the check projection 3 is made to approximately match the thickness of the formwork 8. A bolt hole 6 is bored in the center of the circular closing fitting 5 that is screwed into the female screw 1, and a formwork separator 7 is provided with one end inserted into the hole 6. As shown in the figure, this separator 7 has a pair of trapezoidal stoppers 9,
9 are provided symmetrically in the center of the bolt 10, both ends of the bolt 10 protrude outside the stoppers 9, 9, and manual tightening nuts 11, 11 are screwed into the protruding parts.
It is made up of the following. Note that the reference numeral 12 in the figure is a wrench engaging recess.

``Effects'' Since this project is configured as described above, the formwork construction work with constant formwork spacing can be carried out smoothly and quickly, which not only improves work efficiency, but also improves the reinforcing bars of the concrete walls and the reinforcing bars of the concrete beams. This eliminates the duplication of reinforcing work between the two formworks, and the separator can be corrected and adjusted on the outside after both formworks are erected, making it easy to adjust the formwork spacing.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the formwork spacing support device of the present invention, and FIG. 2 is a longitudinal sectional view of the device in an implemented state. 1... Large diameter female screw, 2... Notch groove, 3... Check protrusion, 4... Flange, 5... Closing fitting, 6...
Bolt hole, 7...Formwork separator.

Claims (1)

[Scope of utility model registration request] A plurality of notched grooves are formed at the tip of a large-diameter female screw so that the tip can expand and contract in the radial direction, a check protrusion is provided on the outside of the tip, and a flange is provided at the base end of the screw. A formwork spacing support device comprising a formwork separator having a bolt hole drilled in the center of a closing fitting which is provided and screwed into the same screw, and one end of which is inserted into the hole.