JPH0235950Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of application of the invention> This invention relates to a bracket for supporting the formwork center on the upper part of a bridge pier when constructing a concrete viaduct slab.

<Problems to be solved by conventional technology and ideas> In general, elevated bridges for railways and roads are often constructed parallel to conventional routes, and the formwork center of the slab below which vehicles pass is It must be height-adjustable and detachable at the top of the bridge pier so that it does not obstruct vehicle traffic.

Therefore, as shown in FIGS. 3 and 4, a center support bracket 1 is constructed by fixing a horizontal beam 3 at right angles to the upper end of a conventionally vertical fixed frame 2, and fixing a cane 4 between the lower end of this fixed frame and the horizontal beam. It is known that the structure is removably attached by tightening the upper and lower ends of the fixed frame 2 that are in contact with the surface of the pier 5 and the fastening members 6 that are in contact with the back surface of the pier 5 with horizontal tie rods 7 on both sides. It is being

However, in the conventional bracket mounting structure described above, the bearing force acting on the pier against the load of the center installed on the horizontal beam is generated only at the lower end of the fixed frame, which is the connection point between the upper fastening member and the cane. Moreover, the upper end of the fastening member only supports the horizontal force, and the support for the vertical force is exclusively at the lower end of the fixed frame, so the fastening force of the fastening member does not act as any supporting force, and the vertical supporting force of the bracket is increased. There was a risk of falling and falling.

<Means for solving the problems> In order to solve the above-mentioned conventional problems, this invention
By fastening the lower end of the fixed frame of the bracket to the fastening member diagonally above, the parts that generate bearing pressure are tied together, allowing the mutual fastening force to work effectively, and the vertical supporting force is applied to the top and bottom fastening members. The purpose of the present invention is to propose a mounting structure for a bracket that reliably and stably fixes the bracket and prevents it from slipping off.

<Embodiment> The following describes an embodiment of this invention shown in the drawings. In FIGS. 1, 2, and 5, a bracket 1 has a horizontal beam 3 fixed at right angles to the upper end of a vertical fixed frame 2, It is constructed by fixing a crutch 4 between the lower end of the fixed frame 2 and the middle part of the horizontal beam 3.

This bracket 1 has its fixed frame 2 in contact with the surface of the pier 5, and the upper end 13 and the beam-shaped fastening member 6 in contact with the back surface of the pier 5 at the same height position are connected on both sides of each other. At the same time, the lower end of the fixed frame 2 and the fastening plates 9, 9' provided diagonally opposite each other on both sides of the fastening member 6 are connected by a diagonal tie rod 10. Natsuto 11
It is supported and fixed to the bridge pier 5 by tightening with.

<Operation of the invention> When the center 12 of the overhang formwork is installed on the horizontal beam 3 in the above configuration, the load causes the lower end of the fixed frame 2 to which the cane 4 is connected to the fastening member 6
At the same time, a horizontal bearing force is generated by the tightening force of the diagonal tie rod 10, and the frictional force caused by these bearing forces supports the bracket 1 on the pier 5, and furthermore, the brace 4 is The bracket 1 is supported on the pier 5 by the mutual vertical reaction force by having the lower end of the fixed frame 2 and the fastening member 6 share the vertical reaction force generated at the lower end of the combined fixed frame 2.

In this way the bracket 1 is connected to the horizontal beam 2
The fixed frame 2 is
A frictional force is generated between the lower end of the fixed frame 2 and the fastening member 6, and a vertical support force is generated between the lower end of the fixed frame 2 and the fastening member 6, which are connected to each other by the diagonal tie rods 10, so that the fixed frame 2 is reliably and stably supported on the pier 5. be able to.

<Effects of the invention> As described above, according to this invention, the lower end of the fixing frame, which generates a horizontal bearing force due to the load acting on the horizontal beam, and the fastening member are fastened to each other by a diagonal tie rod. The fastening force works effectively, increasing the horizontal support pressure between the lower end of the fixed frame and the fastening member, and also shares the vertical reaction force acting on the lower end of the fixed frame with the fastening member, allowing the bracket to be attached to the pier more reliably and stably. It can be supported and fixed, and as a result, the vertical support force with frictional resistance is approximately twice that of a conventional bracket. Therefore,
The structure of the present invention can prevent the risk of the bracket slipping off.

[Brief explanation of the drawing]

Figure 1 is a side view showing an embodiment of this invention, Figure 2 is a side view showing an embodiment of this invention.
3 is a side view showing a conventional bracket mounting structure, FIG. 4 is a cross-sectional plan view of the same, and FIGS. 5a and 5b are enlarged views of the broken line portion in FIG. 1. 1... Bracket, 2... Fixed frame, 3... Horizontal beam, 4... Strap, 5... Pier, 6... Fastening member, 7... Horizontal tie rod, 10... Diagonal tie rod.

Claims (1)

[Scope of utility model registration request] In a bracket in which a horizontal beam is fixed at right angles to the upper end of a vertical fixed frame, and a brace is fixed between the lower end of the fixed frame and the horizontal beam, the upper end of the fixed frame in contact with the pier surface and horizontally to this A horizontal tie rod is used to connect both sides of the fastening member that corresponds to the back surface of the pier, and a diagonal tie rod is used to connect the lower end of the fixed frame and both sides of the fastening member. Mounting structure for viaduct center support brackets.