JPS6055650B2 - Anchor bolt installation method - Google Patents

Description

[Detailed description of the invention] The present invention relates to an anchor bolt installation method.

Conventionally, there is a method shown in FIG. 1 as a method for installing anchor bolts for use in prefabricated houses, for example. This is formwork 1
, and pour ready-mixed concrete 2 inside this. On the other hand, nails 3 are driven on the formwork 1 as a reference point for planting anchor bolts, and the water system 4 is stretched directly across the formwork 1. First, pillar anchor bolts 5 are embedded in the intersection of the water system 4 before the fresh concrete 2 hardens. Next, the positions of the foundation anchor bolts 6 from the pillar anchor bolts 5 are measured by convex and embedded in the ready-mixed concrete 2. However, as shown in FIG. 2, because the fresh concrete 2 is soft, the anchor bolts 5 and 6 are displaced as shown by the chain lines.

Therefore, as shown in FIG. 3, when installing the base 7 after the fresh concrete 2 has hardened, the anchor bolts 5 and 6 may not align with the mounting holes 8 of the base 7, making installation impossible. Further, since the position of the foundation anchor bolt 6 is measured in a convex manner, the measurement work is troublesome and work efficiency is poor. Moreover, a measurement error may cause a positional shift, making it impossible to attach the base 7. Therefore, an object of the present invention is to provide a new anchor bolt installation method that eliminates such conventional drawbacks.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 4 and 5, and the same parts as those of the conventional example will be given the same reference numerals and the explanation thereof will be omitted.

In Fig. 4a, reference numeral 9 is a scale for locating and using anchor bolts, which has a length longer than the distance between pillars, and has nail holes at both ends.
has 0.

Knock pins 11 are provided near both ends at positions corresponding to the positions of the pillar anchor bolts 5, and a plurality of knock pins 12 are provided between the knock pins 11 at positions corresponding to the positions of the foundation anchor bolts 6. In FIG. 4b, the jig 13 for the foundation anchor bolt 6 is shown. This has a through hole 14 formed at one end through which the knock pin 12 is passed, and a nail hole 10 at the other end. A through hole 15 for the anchor bolt 6 is formed in the central portion. In FIG. 4c, a jig 16 for the pillar anchor bolt 5 is shown. It is T-shaped and has nail holes 10 at the two ends. A through hole 17 through which the knock pin 11 passes is formed near one end, and a through hole 18 for the anchor bolt 5 is formed in the center. Therefore, as shown in FIG. 5, fresh concrete 2 is poured into the formwork 1, and the scale 9 is fixed to the formwork 1 with nails 19.
The jig 16 for the pillar anchor bolt 5 is attached to the through hole 17.
It is mounted in a predetermined position by passing a dowel pin 11 through it and fixing it to the formwork 1 with nails 19. On the other hand, the jig 13 for the foundation anchor bolt 6 is attached at a predetermined interval by passing the dowel pin 12 through the through hole 14 and fixing it to the formwork 1 with a nail 19. Thereafter, the anchor bolts 6 and 5 are passed through the through holes 15 and 18 of the jigs 13 and 16, respectively. Therefore, after the fresh concrete 2 has hardened, the anchors 5 - bolts 5 and 6 will be planted at their respective positions. Then, a base 7 is attached to these anchor bolts 5 and 6. In this way, the present invention embeds anchor bolts in fresh concrete poured into a formwork, attaches to the formwork a jig with a through hole for passing the anchor bolt through, and inserts the anchor bolt into the through hole of the jig. In the case where the positioning is done by penetrating, nail holes are provided at both ends and dowel pins are provided at positions corresponding to the positions of the column anchor bolts near both ends, and a plurality of dowel pins are provided at positions corresponding to the positions of the foundation anchor bolts between the dowel pins. An anchor bolt positioning scale equipped with a dowel pin is fixed to the formwork with nails, and a through hole for the dowel pin to pass through at one end, a nail hole at the other end, and a through hole for the anchor bolt in the center are formed. Attach the jigs at predetermined intervals by passing dowel pins through the through holes and fixing them to the formwork with nails.
A jig with a nail hole at two ends, a through hole for a dowel pin near one end, and a through hole for an anchor bolt in the center is formed, and the dowel pin is passed through the through hole. The anchor bolts are installed in the specified position by fixing them to the formwork with nails, and each anchor bolt is installed using a jig that is attached to the specified position via the anchor bolt positioning scale. Because the position is determined and fixed, it has the advantage of reliably eliminating the disadvantage of conventional methods in which the anchor bolts become misaligned after the fresh concrete hardens, making it impossible to install the foundation metal fittings. Since there is no need to measure the anchor bolt embedding position using a convex system, the efficiency of anchor bolt embedding work can be improved and the construction period can be significantly shortened.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the conventional method, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a perspective view showing the mounting state of the base by the conventional method, and Fig. 4 A, b, and c are the main parts. FIG. 5 is a perspective view showing an anchor bolt positioning scale and jig according to an embodiment of the method of the invention. FIG. 5 is a perspective view showing an embodiment of the method of the invention. 1...Formwork, 2...Ready-mixed concrete,
5...Anchor bolt for pillar, 6...Anchor bolt for foundation, 7...Foundation, 9...
・・Anchor bolt positioning scale, 11, 12・
...Dowel pin, 13, 16...Jig,
14, 15, 17, 18... through holes.

Claims (1)

[Claims] 1 Anchor bolts are embedded in fresh concrete poured into a formwork, a jig with a through hole for passing the anchor bolt through is attached to the formwork, and the anchor bolt is positioned by passing through the through hole of the jig. An anchor bolt position in which a nail hole is provided at both ends and a knock pin is provided at a position corresponding to the position of the column anchor bolt near both ends, and a plurality of knock pins are provided between the knock pins at a position corresponding to the position of the foundation anchor bolt. Fix the scale for extraction to the formwork with nails, and attach a jig that has a through hole at one end for the dowel pin to pass through, a nail hole at the other end, and a through hole for the anchor bolt in the center, into the through hole. They are installed at specified intervals by passing dowel pins through them and fixing them to the formwork with nails, forming a T-shape, with nail holes at two ends, a through hole for the dowel pins to pass through near one end, and a through hole in the center. An anchor bolt planting method characterized by installing a jig in which a through hole for an anchor bolt is formed in a predetermined position by passing a dowel pin through the through hole and fixing it to a formwork with a nail. .