JPH0536037Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a PC (prestressed concrete)
This relates to a halter for prestressing steel beams used when constructing structures.

[Conventional technology and its problems]

For example, as shown in Figure 7, the PC
In structures, prestress is introduced by disposing prestressing steel members 1 in the horizontal and vertical directions in order to cancel out the tensile stress caused by the hydraulic pressure of the stored liquid.

This PC steel material 1 is naturally buried in the concrete frame of the tank, and is set at the reinforcing stage during construction. In the construction of such an egg-shaped digester, a method has been devised in which prestressing steel materials are arranged helically in the bottom slab part, and FIG. 8 is a partially omitted plan view showing the arrangement of the prestressing steel materials 1 in the bottom slab part. , FIG. 9 is a partially enlarged view of the same, and the end of the PC steel material 1 with the connector for the joint needs to be held so as to protrude from the outer periphery of the bottom plate at an upward angle.

By the way, there is no existing halter that can hold the end of the prestressed steel material in the proper position, as shown in Figure 10. It is conceivable that with such a device, the height, direction, and angle of holding cannot be adjusted sufficiently, and it is extremely difficult to set everything in the same position.

The purpose of the present invention is to take such circumstances into consideration and provide a halter with a simple structure that is easy to use and allows the holding state to be adjusted in any three-dimensional direction of X, Y, and Z.

[Means for solving the problem]

In order to achieve the above object, the present invention consists of two columns with leg plates arranged side by side, and a strip plate having a curved downward protrusion between the columns, which can be moved up and down through vertical long holes formed in the columns. The gist of this is that it can be freely rotated.

[Effect]

According to the present invention, the end of the PC steel material is firmly held within the curved protrusion of the halter strip, and since this strip can be changed in the vertical direction and the mounting angle with respect to the support, corrections in the X and Z2 directions are possible. In addition, the Y-direction can be corrected by slightly shifting the installation location of the halter itself in the left-right direction, and by combining these, three-dimensional adjustment of the holding state is possible.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a front view showing the first embodiment of the halter of the present invention, and Fig. 2 is a side view of the same.
0' is a support using a steel angle member, and a leg plate 11 is provided at the lower end of the support so as to protrude in the front-rear direction.

Two of the pillars 10, 10' are arranged side by side and connected by a crosspiece 12, and furthermore, a long hole 13 is formed in the vertical direction.

On the other hand, reference numeral 14 is a steel strip plate stretched between the pillars 10 and 10', the center of which is bent greatly downward to form a curved protrusion 15, and the end part is bent at right angles. This portion is attached to the elongated hole 13 with bolts and nuts 16 so as to be vertically movable and rotatable.

Next, how to use it will be described. FIG. 5 is a side view showing the state of use, and the prestressing steel material 1 is held by being inserted midway near the end into the curved protrusion 15 of the strip plate 14. When holding in this way, the height is adjusted by moving the end of the strip plate 14 up and down within the elongated hole 13, and the inclination angle is adjusted by rotating the strip plate 14 as appropriate. This is done by changing it. Furthermore, the lateral position can be corrected by slightly shifting the installation position of the halter of the present invention on the ground to the left or right.

Figures 3 and 4 show a second embodiment of the present invention, in which strip plates 14 are attached in two stages, upper and lower, to the supports 10 and 10' so that two pieces of PC steel material 1 can be held at once. The state of use thereof is shown in FIG. 6, but the detailed explanation will be omitted since it is the same as that of the first embodiment.

[Effect of idea]

As mentioned above, the halter of the present invention is easy to use because it can easily adjust the position three-dimensionally when holding the end of the PC steel material extending upward in a fixed position. It has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the first embodiment of the halter of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a front view showing the second embodiment, Fig. 4 is a side view of the same, Fig. 5 is a side view showing the state in which the halter of the first embodiment is used;
Fig. 6 is a side view showing how the halter of the second embodiment is used, Fig. 7 is an explanatory diagram of the spherical PC structure, and Fig. 8
The figure is a partially omitted plan view showing the arrangement of the PC steel material in the bottom plate of a spherical PC structure, Figure 9 is a partially enlarged view of Figure 8, and Figure 10 is a perspective view of a halter according to the prior art. . 1...PC steel material, 2...Shotcrete,
3... Bottom slab concrete, 4... Ring beach formwork, 5... Climbing scaffolding, 6... Ring foundation, 7... Side wall, 8... Frame scaffolding, 10, 10'
... Support column, 11 ... Leg board, 12 ... Horizontal timber, 13
... Long hole, 14 ... Band plate, 15 ... Curved protrusion,
16...Boruto, Natsuto.

Claims (1)

[Scope of utility model registration request] Two pillars with leg plates are lined up, and a band plate with a curved downward protrusion is spanned between the pillars through a vertical long hole formed in the pillars so that it can move vertically and freely rotate. Characterized by Halter.