JP2779546B2 - Anchor bolt support device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device for anchor bolts embedded in a concrete foundation.

FIG. 14 shows a conventional anchor bolt support device. In the drawing, reference numeral 1 denotes a lower support plate made of a metal plate. At four positions, mounting feet 2 made of an iron bar are vertically inserted, and upper and lower nuts 3 screwed to the mounting feet are used to set a predetermined height position. The lower end of the installation foot 2 is fixed on a metal member 4 embedded in discarded concrete. Then, the lower ends of the four anchor bolts 5 are inserted into the lower support plate 1 to be erected, and the upper support plate 6 is similarly attached to the upper end of the anchor bolt 5 so that the anchor bolt 5 is inserted. The end of the support plate 6 is nailed to the formwork 7 to support the upper end of the anchor bolt 5. In addition, after the anchor bolts 5 are attached to the lower support plate 1, the upper support plate 6 is provided with a basic reinforcing bar (not shown) so as to pass between the anchor bolts 5, and further assembled with the formwork 7. It can be attached after In the drawing, reference numeral 8 denotes a reinforcing bar material which is welded to the lower support plate 1 so as to strengthen the support of the lower support plate 1 and to the metal member 4. The one shown in FIG. 15 has been filed by the present applicant as Japanese Patent Application No. 63-107244.

According to the above-mentioned conventional support device, the lower support plate 1 and the upper support plate 6 are separate bodies, and therefore,
Compared to a gantry type in which these are integrated, transportation is easy and inexpensive. In addition, after the anchor bolts 5 are installed and before the upper plate 6 is attached, the base reinforcement is performed. There is an advantage that the reinforcing bar can be dropped from above without being disturbed by the upper plate 6 when the reinforcing bars are installed between them. However, in this conventional example, since the mounting feet 2 that support the lower support plate 1 are made of thin rebar-shaped bars, the whole is likely to be unstable and unstable when the anchor bolts 5 are mounted. As shown by the bar 2 for reinforcement
Has to be reinforced by welding.
Further, in order to accurately determine the height of the upper end of the anchor bolt 5, it is necessary to adjust the height by rotating a nut before welding the lower support plate 1 to the metal material 4. Since the nut 3 supporting the plate 1 from below is in contact with the back surface of the plate 1, its rotation operation is difficult,
After the height is adjusted, it is necessary to weld the nut 3 and fix it so as not to be disturbed during the subsequent work steps. However, there is a drawback that such welding work is difficult for the same reason. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an anchor bolt support device that solves the above-mentioned conventional disadvantages.

Means for Solving the Problems In order to solve the above problems, according to the present invention, several mounting feet consisting of angles are projected below a support plate having a bolt hole for inserting and fixing a lower end of an anchor bolt. This installation foot is characterized in that an adjustable foot, also consisting of an angle, is bolted to the height freely through a vertically long hole formed in one of the installation foot and the adjustment foot. .

Operation According to the configuration of the present invention, the height of the support plate determined by the lengths of these feet can be adjusted in the range of the elongated hole formed in one of the adjustment feet and the installation feet. This adjustment can be made at an intermediate position up to the height of the support plate, so that the adjustment can be made without disturbing the support plate. In addition, since the adjusting foot and the mounting foot are formed at angles, they are strong, so that the positional accuracy of the anchor bolt is less disturbed.

Embodiment FIG. 1 shows an entirety of an anchor bolt used in the present invention and a supporting device thereof. Anchor bolt 11
Male screws 13 and 14 are provided on both upper and lower ends, and these male screws 1
An unbonded sleeve 15 for preventing contact with concrete is externally fitted to the main body portion between 3 and 14. To the male screw 13 at the upper end, two nuts 16 for fixing the column base of the building are attached. On the other hand, two nuts 17 for attaching the anchor bolt 11 and a fixing plate 18 interposed between the nuts 17 are attached to the male screw 14 at the lower end. Reference numeral 19 denotes an underframe.
Is formed by welding four angles of an inverted L-shape in cross section composed of a horizontal portion 20 and a vertical portion 21 in a rectangular frame shape.

Reference numeral 22 denotes a support plate of the present invention, which is formed in a rectangular frame shape as a whole, formed with bolt holes 23 at four corners for inserting the lower ends of the anchor bolts 11, and furthermore, a scribe line is formed at the center of each side. 24 is displayed. Similarly, on the lower surface of the central part of each side, mounting feet 25 projecting downward and consisting of angles
, And an adjusting foot 26 is attached to the mounting foot 25 so as to protrude further downward. The mounting structure of the adjusting foot 26 is as follows.

First, in FIG. 2, three bolt holes 28 are formed vertically on one piece of the mounting foot 25 at intervals. On the other hand, a long hole 29 which is long in the vertical direction is formed in the adjusting foot 26 in correspondence with the bolt hole 28, and the bolt 30 inserted into the long hole 29 is inserted into one of the bolt holes 28, and the butterfly is inserted. The nuts 31 are fixed to each other by tightening. Then, by adjusting the adjustment foot 26 up and down within the range of the elongated hole 29, the support plate 22 at the time of installation is fixed.
The height of the can be adjusted. When the height is changed beyond the range of the elongated hole 29, the height can be adjusted over a wider range by changing the bolt hole 28 into which the bolt 30 is inserted. Reference numeral 32 denotes an upper support plate, which is formed with bolt holes 33 for inserting the upper ends of the anchor bolts 11 at four corners of the substantially rectangular frame-shaped main body, and has four holes 4 of the main body.
A nail hole 34 for fixing to a mold, which will be described later, is formed in an extension extending from the corner. In addition, a scribe line 35 that matches the scribe line 24 of the lower support plate is displayed at the center of each side of the main body.

Next, a method of applying the anchor bolt 11 using the above-described support device will be described in accordance with the order of application.

First, as shown in FIG. 3, a chestnut stone 38 is laid on the root-cut ground, and the underframe 19 is placed on the chestnut stone 38 in the X direction and the Y direction stretched along the pillar core in accordance with the water thread 39. The anchor bolt
Installed according to 11 installation positions. At this time, the height is adjusted so that the upper surface of the underframe 19 becomes the surface of the abandoned concrete described below, and in this state, the vertical portion 21 is fixed to the chestnut stone 38 with the mortar 40 as shown in FIG. As shown in the figure, the concrete 41 is discarded to the same height as the upper surface of the underframe 19 and cast.

After the discarded concrete 41 has solidified, a black ink 42 is drawn on the discarded concrete 41 as shown in FIG. 6 so that the black ink 42 and the scribe line 24 of the lower support plate 22 coincide with each other. The lower support plate 22 is set on the underframe 19. Further, as shown in FIG.
The height of the lower support plate 11 is adjusted while adjusting the length of one installation foot 25 and the adjustment foot (26) by looking at the level ruler 43 erected on 22 from the transit 44, and leveling with a level. Adjust the height of the other three points while watching the
Figure). In addition, it is checked from directly above whether or not the scribing lines 24 of the lower support plate 22 and the black and white inks 42, 42 in the X direction and the Y direction written on the discarded concrete (41) coincide with each other. Position it so that

In this way, after the height of the lower support plate 22 and the positioning in the X and Y directions are performed, as shown in FIG. 8, the lower ends of the underframe 19 to the adjusting feet 26 are welded, and The adjusting foot 26 and the mounting foot 25 are also fixed by welding.

When the lower support plate 22 is fixed at a predetermined position as described above, the lower end of the anchor bolt 11 is then inserted into the bolt hole 23 of the lower support plate 22 as shown in FIGS. The fixing plate 18 is inserted from above, the fixing plate 18 is inserted below, and the lower ends of the anchor bolts 11 are temporarily fixed by upper and lower fixing nuts 17. Further, as shown in FIG. 11, the ruler 45 placed on the upper end of the anchor bolt 11 is viewed from the transit 44, the height is adjusted, and finally, as shown in FIG. 12, it is completely fixed with a spanner.

Next, as shown in FIG. 13, after assembling the reinforcing bars 46 and the formwork 47, the upper ends of the anchor bolts 11 protruding from the top end of the formwork 47 were formed on the upper support plate 32. Insert it into the bolt hole 33. Then, in this state, the X-direction and Y-direction scribe lines 35 formed in the upper plate 32 are used to perform positioning in the X-direction and the Y-direction, and from the nail holes 34 formed in the upper support plate 32, The nail 48 is driven into the top end of the formwork 47 to fix the upper support plate 32.
In this state, concrete is poured into the formwork 47, and after the concrete is solidified, the upper support plate 32 is removed and reused.

Effect of the Invention As described above, according to the present invention, the lower support plate that supports the lower end of the anchor bolt is supported by a reinforcing bar-shaped bar in order to support the lower support plate with an installation foot and an adjustment foot made of an angle. Unlike this, the supporting strength of the anchor bolt is increased, and there is no danger of the accuracy being lost due to collision with other members at the time of foundation reinforcement, and therefore, no special reinforcement is required. In addition, the height of the support plate can be adjusted by rotating the bolt at an intermediate position below the support plate, and a welding operation for integrating the adjustment feet and the installation feet can be performed. Can be performed without being disturbed by the plate portion, and thus there is an effect that the workability is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an anchor bolt and a support device of the present invention, FIG. 2 is an exploded perspective view of a lower support plate, and FIG.
FIG. 5 to FIG. 5 are perspective views showing the construction state from the installation of the underframe to the dumping of concrete, FIG. 6 to FIG. 8 are perspective views showing the construction state from the installation of the lower support plate to the fixing. Fig. 9 to Fig. 12 are perspective views showing a construction state from attachment to fixation of the anchor bolt, Fig. 13 is a perspective view showing a fixation state of the upper support plate to the formwork, Fig. 14 is
It is a perspective view which shows the support structure of the conventional anchor bolt. 11 ... anchor bolt, 22 ... lower support plate, 23 ...
... bolt holes, 25 ... installation feet, 26 ... adjustment feet, 29 ... long holes, 30 ... bolts, 31 ... nuts.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Jikken Sho 59-36564 (JP, Y2) Jikgaku Sho 54-28803 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 27/00

Claims (1)

(57) [Claims] 1. A plurality of mounting feet consisting of angles are projected below a support plate provided with bolt holes for inserting and fixing the lower ends of anchor bolts, and the mounting feet also have adjustments also consisting of angles. An anchor bolt support device, wherein a foot is bolted so as to be adjustable in height through a vertically long hole formed in one of the installation foot and the adjustment foot.