JPS5825145B2 - How to bury a concrete anchor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for burying a concrete anchor for supporting, for example, a prop for manual use.

Conventionally, when embedding concrete anchors in concrete, as shown in FIG.
After the Styrofoam 32 was supported in a formwork, concrete was poured, and after the concrete hardened, the formwork was removed and the Styrofoam 32 was extracted from the concrete 33.

In this case, Styrofoam 3 before concrete placement
The supporting positions of the concrete anchors 310 and 2 are determined mainly by visual measurement, and it is very difficult to make the spacing between the styrofoam concrete anchors 310 constant, that is, the spacing between the concrete anchors 310, and to set the concrete anchors 31 at desired positions. there were.

The present invention has been made to address this problem, and will be described below with reference to the drawings.

In Figs. 2 to 6, 1 is a formwork assembled before concrete pouring, and the formwork 1 includes side plates 2 facing vertically,
2, a bottom plate 3 facing in the horizontal direction, and the side plate 2 facing in the vertical direction.
, 2, and horizontal bars 4 attached to both upper and lower ends of the outer surface of the side plates 2.

5 is an anchor support for supporting concrete anchors 6 at a predetermined pitch before concrete is poured into the formwork 1; The nails 7 are hung horizontally between the crossbars 4 and 4.
a support plate 8 that is attached to the support plate 8, and an inverted truncated cone-shaped recess forming member 9 that is attached to the center of the support plate 8, that is, the center between the side plates 2, 2 in a suspended state from the support plate 8; In order to connect the support plate 8 and the recess forming member 9, a disc part 11 is attached to the upper surface of the member 9 with nails 10 or the like, and nuts 12 are attached to the upper and lower surfaces of the periphery of the center hole 11a of the disc part 11. A threaded rod 14 whose upper end is screwed into the nut 13 on the lower side and is fixed by welding to the nut 13.
The connecting member 15 and the center hole 8a of the support plate 8 have
The bolt 17 has a threaded portion 16 passing through it from above and is screwed into the upper nut 12 of the connecting member 15.

The recess forming member 9 has the lower nut 13 in the center.
A through hole 18 into which the threaded rod 14 is inserted is provided.

This anchor support 5 has a supporting plate 8, a connecting member 15, and a recess forming member 9 connected to each other by the needle 10, a nut 12, 13, a threaded rod 14, and a bolt 17, and the recess forming member 90 is inserted through the anchor support 5. The threaded rod 14 protrudes from the lower end of the hole 18 and is screwed into the center screw hole 6a of the upper plate portion 6a of the concrete anchor 6, and concrete is poured with the concrete anchor 6 attached to the lower side of the recess forming member 9. Before installation, as shown in FIGS. 3 and 4, the support plates 8 are attached to the crossbars 4, 4 at a predetermined pitch in the length direction of the crossbars 4, 4.

In this state, as shown in FIG. 4, concrete 19 is poured into the formwork 1, and after the concrete 19 has hardened, the nails 7 are removed and the bolts 17 are loosened to attach the support plate 8 to the crosspiece 4. , 4 from above, and then remove formwork 1.

Thereafter, as shown in FIG. 5, by fitting a wrench 20 or the like onto the upper nut 12 of the connecting member 15 and rotating the wrench 20 to the left, the lower end of the threaded rod 14 is inserted into the center threaded hole 6a of the concrete anchor 6. and remove the recess forming member 9 from the concrete anchor 6.

As a result, when the recess forming member 9 is taken out from the concrete IJ-N9, a recess 21 is formed in the concrete 19 above the concrete anchor 6, and a handrail is formed on the upper plate 6a of the concrete anchor 6 as shown in FIG. The lower ends of the columns 22 are fixed by welding.

After welding the column 22, a cover is fitted onto the column 22 and mortar or the like is inserted into the recess 21.

When attaching the anchor support 5 to the crosspieces 4, 4 at a predetermined pitch, mark the support attachment positions on the crosspieces 4, 4, place the support plate 8 on this part, and attach it with nails 7, etc. Good.

Further, the formwork 1 may be removed after the recess forming member 9 is removed from the concrete 19.

7 and 8 will be explained in conjunction with the arrows.

In this case, the support plate 8 of the anchor support 5 is directly fixed to the upper end of the recess forming member 9 in the shape of an inverted truncated cone (a rectangular shape with a downward concave shape is also possible) with a nail 23 or the like, and the recess forming member 9 The lower end threaded portion 24a of the bolt 24 is inserted vertically into the center through hole 18 and projects from the lower end of the recess forming member 9.
is screwed into the center screw hole 6a of the upper plate 6a of the concrete anchor 6.

The bolt 24 is rotatable with respect to the recess forming member 9, and has a head 24b in contact with the upper surface of the recess forming member 9 so as not to move up and down from the recess forming member 9, and has a recess near the lower end. A washer 25 for preventing upward removal is fixed by welding within the lower end recess 9a of the entry forming member 9.

26 is the center hole of the support plate 8.

Therefore, as shown in FIG.
are connected with nails 23, etc., and with the recess forming member 9 and the concrete anchor 6 connected with bolts 24, the support plate 8 is supported on the crossbars 4, 4 of the formwork 1, and in this state, the formwork 1 is Conch inside! J-)19 is cast.

When the concrete 19 hardens, as shown in FIG. 8, the support plate 8 and the horizontal beams 4, 4 are uncoupled, a wrench or the like is fitted onto the bolt head 24b, and the bolt 24 is rotated counterclockwise. The lower end threaded portion 24a of the bolt 24 comes out from the center threaded hole 6a of the concrete anchor 6.

At this time, the recess forming member 9 is lifted up together with the bolt 24, and the recess forming member 9 is taken out from the concrete 19.

As a result, a recessed portion 21 is formed in the concrete 19 above the concrete anchor 6, and after that, the formwork 1 is removed and a support column is subsequently supported on the concrete anchor 6.

The anchor supports 5 are attached to the horizontal beams 4, 4 at predetermined intervals.

The method for burying the concrete anchor of the present invention can be carried out as described above, and the threaded portion protruding from the center of the lower end [
The upper plate of the concrete anchor is screwed onto the threaded rod 14 and the lower end threaded portion 24a] to which the anchor is attached. An anchor support consisting of a supporting plate is supported on the crosspiece with the concrete anchor attached, and then concrete is poured into the formwork, and after the concrete hardens, The method is characterized in that the support between the support plate and the crosspiece is released, the threaded portion is rotated to remove it from the concrete anchor, the recess forming member is lifted, and then the recess forming member is removed from the concrete. Concrete anchors can be positioned at predetermined pitches using the support plate of the anchor support attached above.

Furthermore, the recess forming member of the anchor support can be easily removed from the concrete by rotating the threaded portion.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing a conventional example, Fig. 2 is an exploded perspective view of the main parts of the anchor support used in the present invention, and Fig. 3 is a schematic plan view showing the anchor support attached to a crosspiece. Figures 4 to 6 are longitudinal sectional views showing the working order of the present invention, and Figs. 7 and 8 are longitudinal sectional views showing the working order of the present invention when another anchor support is used. be. 1...Formwork, 2...Side plate, 3...
...Bottom plate, 4 ... Crosspiece, 5 ... Anchor support, 6 ... Concrete anchor, 6a
...... Upper plate part 6 a/... Center screw hole part, 7... Nail, 8... Support plate, 9.
... Recessed part forming member, 10 ... Nail, 11
...Disc part, 12゜13...Natsuto,
14... Threaded rod, 15... Connecting member,
17...Bolt, 18...Through hole, 1
9... Concrete, 20... Wrench, 21... Recessed part, 22... Support column, 2
3... Nail, 24... Bolt, 24a.
...Lower end threaded part, 24b...Head, 25
...Washer.

Claims (1)

[Claims] 1. A recess forming member to which the anchor is attached by screwing the upper plate part of the concrete anchor to the threaded part protruding from the center of the lower end, and a recess forming member connected to the upper side of the recess forming member and supported on the crosspiece at the upper end of the formwork. An anchor support consisting of a support plate with the concrete anchor attached is supported on the crosspiece by using the support plate, and then concrete is poured into the formwork, and after the concrete has hardened. A concrete anchor characterized in that the supporting plate and the crosspiece are released from support, the threaded portion is rotated to remove it from the concrete anchor, and the recessed portion forming member is lifted up so that the rear leg recessed portion forming member can be taken out from the concrete. burial method.