JP3195776B2 - Anchor bolt positioning tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt positioning tool for quickly and accurately installing an anchor bolt for supporting a steel column of a steel structure on a concrete foundation.

[0002]

2. Description of the Related Art A steel column of a steel structure is connected to an anchor bolt installed so as to protrude from a concrete foundation. Conventionally, at the time of anchor bolt installation work, manufacture an iron plate to guide the arrangement of anchor bolts each time, or create a wooden plywood that is easy to process on site, and determine the arrangement relationship of anchor bolts with this iron plate or wooden plywood. I was A large steel structure has a dedicated positioning tool (base pack) that determines the arrangement of the anchor bolts.However, in the case of a small steel building with a focus on inexpensive and simple construction, the use of the positioning tool increases the construction cost. Not used because it would be expensive.

[0003]

A positioning tool is indispensable for accurately determining the arrangement of the anchor bolts.
For this positioning tool, iron plate or wooden plywood is frequently used in terms of cost, but since there are many types of steel columns, the arrangement relationship of the corresponding anchor bolts is also diverse, and it is not possible to manufacture the positioning tool for each construction It took a lot of trouble. In addition, since it is manufactured only for each construction and is assumed to be used only once, there is a limit in cost reduction. Further, when the arrangement relationship of the anchor bolts changes during the construction, there is also a trouble that the positioning tool has to be manufactured again. Therefore, we studied to develop a positioning tool for arranging anchor bolts and installing them on concrete foundations simply, quickly and accurately by reducing the labor for each construction and change.

[0004]

Means for solving the problem The thing developed as a result of the study is to surround the opening provided at the center of the whole, and to insert a bolt insertion hole into a position corresponding to the mounting hole provided on the bottom plate of the steel column to be supported. An anchor bolt positioning tool provided with a nut fitting step formed in the bolt insertion hole. The positioning tool of the present invention, for example, has an opening and a bolt insertion hole formed in a flat plate, and a block having a nut fitting step formed in the bolt insertion hole is attached or radially extended from the block forming the opening. It can be composed of a plurality of members, for example, by attaching a block integrally formed with a bolt insertion hole and a nut fitting step to the arm.

[0005] However, from the viewpoint of productivity, the positioning tool is formed as an integrally molded product having a concave / convex structure which can be entirely die-cut, and in which a bolt insertion hole is provided at the position of the concave portion to be grounded or at the convex portion protruding upward. It is desirable. Examples of the integrally molded product include plastic products such as a resin integrated molded product and a cellulose integrated molded product, as well as a sheet metal pressed product. If a plurality of convex portions are configured to have a continuous outer shape, instead of being configured for each bolt insertion hole, the convex portions function as a kind of rib, and the structural strength of the entire positioning tool is increased. Thus, for example, in a positioning tool made of a resin integrally molded product, a convex portion is formed in a certain region of a plate material having a thickness of several mm, and a plurality of bolt insertion holes are arranged in the convex portion. If necessary, a rib extending from the convex portion or an independent rib at the concave position may be added as a strength member.

[0006] Thermoplastic synthetic resin
(Plastic) is suitable. This resin material is easy to mold, the material price is low, and recycled products from waste can be used. When the positioning tool is made as a resin-integrated product, if the whole is made translucent or transparent, the positioning tool can be seen through the back surface of the positioning tool, and there is an advantage that pouring of concrete during installation work can be confirmed. Cellulose molded product is mainly cellulose (vegetable fiber)
Solidified into a predetermined shape with a solidifying agent or the like, and the recovered waste paper can be manufactured as a recycled resource. Thus, the positioning tool of the present invention consisting of an integrally molded product,
Enables productivity reduction and cost reduction including recycling.

One set of bolt insertion holes may be provided corresponding to the mounting holes provided on the bottom plate of at least one type of steel column. However, the bolt insertion holes may correspond to the mounting holes provided on the bottom plates of a plurality of types of steel columns. By arranging them at the respective positions, a bolt insertion hole can be selected according to the steel column to be installed, and a single positioning tool can be used for installation work of a plurality of types of steel columns. Usually, the mounting hole on the bottom surface is provided so as to draw a square shape with the mounting hole as a middle point on a corner or a side, so that the bolt insertion hole sets a virtual square frame line surrounding the opening, and It is good to arrange the middle point on the corner or side of the square frame line. When using the positioning tool, select two or four parts according to the mounting holes on the bottom plate.
Or a combination of eight bolt insertion holes. Each bolt insertion hole does not need to be completely opened, and may have a structure in which, for example, only a cross cut is made in an area equivalent to the bolt.

In the positioning tool of the present invention, the relative position of the anchor bolt to the bolt insertion hole is uniquely determined by fitting the nut screwed to the anchor bolt into the nut fitting step. The relative positional relationship is such that a nut fitting step having an annular side surface is formed concentrically with the center of the insertion hole of the bolt insertion hole, and the center of the insertion hole of the bolt insertion hole coincides with the center of the bolt of the anchor bolt. Is preferred. It is usually preferable to open the bolt insertion hole with a larger diameter than the diameter of the anchor bolt in order to facilitate the insertion of the anchor bolt.Therefore, the relative positional relationship of the anchor bolt is slightly shifted for each bolt insertion hole. Would. The present invention realizes a simple, quick and accurate arrangement relationship of anchor bolts by separately forming a nut fitting step.

In practice, anchor bolts having different diameters are often used for the same bolt insertion hole, and therefore, the size of nuts to be screwed to the respective anchor bolts also varies. Therefore, the nut fitting step is formed in multiple stages corresponding to a plurality of types of nuts, so that even when different nuts are used according to the anchor bolt, the center of the insertion hole and the center of the bolt can be matched. Become. In this case, it is not necessary to form steps corresponding to the sizes of all nuts. For example, in the case of a nut fitting step formed around the center of the insertion hole, if three steps consisting of a large diameter, a medium diameter, and a small diameter are formed, almost all nuts can be handled, and such a step is made of an integrally molded product. The positioning tool can be easily manufactured.

A positioning tool in which a plurality of virtual square frame lines having different sizes or outer shapes are set in correspondence with the mounting holes provided in the bottom plate of a plurality of types of steel columns, and a bolt insertion hole is arranged in each of them, has conventionally been used. Will have no versatility,
Depending on the size or outer shape of each combined virtual square frame line, there is a possibility that the bolt insertion holes will interfere with each other. In this case, for example, if the virtual square frame lines are similar squares, they may be rotated in the circumferential direction while aligning their centers so that the bolt insertion holes to be arranged do not interfere with each other. As a result, in the positioning tool made of an integrally molded product having a concavo-convex structure, the protruding portions provided corresponding to the bolt insertion holes are connected, and the protruding portions constitute ribs having a complicated outer shape as a whole, and the structure of the positioning tool There is an advantage that the strength can be further increased.

In order to make the arrangement relationship of the anchor bolts more accurate, a gauge strip or a gauge groove connecting the centers of the insertion holes of the bolt insertion holes arranged in a point symmetry is provided. This gauge strip or gauge groove corrects the displacement of the positioning tool itself by the gauge strip or groove being horizontal and along a predetermined straight line,
Consequently, the arrangement of the anchor bolts is made accurate. For example, when arranging a plurality of steel columns with respect to a cloth foundation, the positioning tool of the present invention, which is arranged in correspondence with the standing of each steel column, is accurately aligned by aligning the gauge strips or grooves with each other in a straight line. You can try to align the steel columns.
When a convex portion is formed, it is easy to cut a gauge groove.

As described above, when a plurality of virtual square frame lines are set and any one of them is rotated in the circumferential direction, the positioning tool must be rotated obliquely with respect to the concrete foundation and placed. . In this case, depending on the size of the positioning tool, an edge (in many cases, a corner) interferes with the mold. Therefore, a bent line portion that bends the edge into a set shape is provided. That is, the edge part that interferes with the formwork is bent upward (or downward in some cases) from the bent line part to avoid interference with the formwork.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the anchor bolt positioning tool of the present invention, and FIG.
FIG. 3 is a perspective view showing a state in which the positioning tool of FIG. 1 is placed on the concrete foundation 1 and the anchor bolts 3 are inserted into the bolt insertion holes 2 arranged on the medium-sized virtual square frame line M. FIG. 4 is a perspective view corresponding to FIG. 3 showing a state in which the anchor bolt 3 is inserted into the bolt insertion holes 2 arranged on the large virtual square frame line L, and FIG. 5 is a view showing the installation of the anchor bolt 3 from the state of FIG. FIG. 6 is a perspective view showing a state in which each of the anchor bolts 3 is inserted into the steel column 4, and the height or the inclination is adjusted by the height adjuster 5 and the tightening of the anchor bolts 3. FIG. 7 is a perspective view showing a state in which the base of the steel column is filled with concrete 6 after the adjustment is completed.

The positioning tool of this embodiment is a translucent thin plate-like polypropylene integrally molded product. There is no limitation on the type of resin, and polyethylene and the like can also be used. Also,
It is also possible to use a regenerated resin from waste plastic, or an integrally molded product obtained by solidifying cellulose obtained by pulverizing paper. The shape may be a thick foamed resin board that appropriately penetrates through the bolt insertion hole from a structure in which an uneven surface is formed on a thin plate as in this example. The color is also free, but it is desirable that the material be translucent or transparent so that the state behind the back surface can be visually recognized during the construction work.

Specifically, as shown in FIG. 1, three sets of virtual square frame lines S, M, and L having an opening 7 at the center and having the center as the same center of gravity are set. Bolt insertion holes 2 of the same shape at the corners and midpoints on the sides of virtual square frame lines S, M, L
Is arranged. Each virtual square frame line S, M, L has a similar shape of a square corresponding to the mounting hole provided in the bottom plate of the supporting steel column, and differs only in size. In this example, the shortest distance from the center of gravity (total center) to the sides of each virtual square frame line is 100 mm for the small virtual square frame line S, 150 mm for the medium virtual square frame line M, and 175 mm for the large virtual square frame line L. And In the combination of the virtual square frame lines of the present example, the bolt insertion holes 2 of the medium and large virtual square frame lines M and L interfere with each other. Therefore, the large virtual square frame line L is set by rotating it by 20 degrees. A bent line portion 9 is provided so that the corresponding corner piece 8 can be bent upward when the bolt insertion hole 2 on the virtual square frame line L is used.

The protruding portion 10 is configured such that the edge 11 to be grounded is in a recessed position and has a shape including the bolt insertion holes 2 and is provided with a step relative to the edge 11. This convex part 10
Is a strength member that enhances the structural strength of the entire positioning tool. As shown in FIG. 2, a multi-step annular nut fitting step 12 is formed concentrically with the bolt insertion hole 2 and further passes through the center in the radial direction. It is also a base for engraving the gauge groove 13 extending to the base. The nut fitting step 12 is formed by fitting the nut 14 screwed into the anchor bolt 3 to be inserted,
The center of the insertion hole of the bolt insertion hole 2 and the center of the bolt of the anchor bolt 3 are simply and accurately matched. Further, in this example, a rib 15 is provided in the radial direction from the convex portion 10 so that the edge portion 11 is not unnecessarily bent. Either shape can be punched up and down, and the positioning tool of the present invention can be easily produced by integral molding.

Next, an example of a construction procedure using the positioning tool of the present embodiment will be described. First, the height adjuster 5 is set approximately at the center of the mold 16.
Is formed, and the positioning tool is placed on the concrete foundation 1 as shown in FIG. Since the positioning tool is provided with the opening 7, there is no interference with the height adjusting tool 5, but the positioning of the positioning tool is not accurate because the opening 7 is provided with sufficient space. Therefore, the mounting position of the positioning tool is adjusted by making the gauge groove 13 perpendicular to the height adjusting tool 5. When a plurality of positioning tools are arranged, by arranging the positioning tools so that their gauge grooves are aligned on a straight line, it is possible to align the columns of standing steel columns.

After the positioning tool is thus arranged, the anchor bolt 3 is inserted into the selected bolt insertion hole 2 and the anchor bolt is driven into the concrete foundation 1. In the example shown in FIG. 3, a total of four anchor bolts 3 are inserted into the bolt insertion holes 2 corresponding to the respective corners of the medium-sized virtual square frame line M. This is a position corresponding to a mounting hole 18 provided in a bottom plate 17 of the steel column 4 described later (see FIG. 6). As described above, since the large virtual square frame line L is rotated by 20 degrees from the small and medium virtual square frame lines S and M, when the bolt insertion hole 2 on the large virtual frame line L is used, FIG. As you can see,
Bending the corner piece 8 from the bending line portion 9 upward,
The entire positioning tool is rotated and fitted into the mold 16. This makes it possible to determine the exact arrangement of the bolt insertion holes 2 in the same positioning operation using the gauge groove 13 as described above.

The accurate insertion position of the anchor bolt 3 into the positioning tool can be easily determined by fitting the nut 14 screwed to the anchor bolt 3 into the nut fitting step 12 as shown in FIG. Can decide. Bolt insertion hole 2
Since the hole is opened in accordance with the maximum diameter of the anchor bolt to be used, the insertion position cannot be accurately determined with an anchor bolt having a smaller diameter than that. The nut fitting step 12 is
By fitting the nut 14 screwed into the anchor bolt 3, the center of the bolt of the anchor bolt 3 is indirectly matched with the center of the insertion hole of the bolt insertion hole 2, and the accurate arrangement relationship of the anchor bolt 3 is changed. Secure it. When inserting the anchor bolt 3, the positioning tool can be nailed as necessary to completely fix the positioning tool on the concrete foundation 1 so that the positioning tool does not shift. Thus, the positioning tool of the present invention not only simplifies the anchor bolt installation work, but also accurately
Can be determined.

The positioning tool is based on the fact that the anchor bolts 3 are accurately arranged, and when the concrete foundation 1 is sufficiently solidified, the nuts 14 are loosened and pulled out upward, removed, and reused. Because the positioning tool of the present invention has versatility that can support a wide variety of steel columns and anchor bolts,
It can be reused. In addition, as a method of removing the positioning tool of the present invention, concrete 6 to be poured later is used.
(See FIG. 7), a method of cutting the sheet in the case of a thin plate like the positioning tool of the present example, and a method of incineration in the case of a positioning tool made of an integrally molded cellulose product can also be used. In this example, reuse is performed. After the positioning tool is removed, as shown in FIG.
When the steel column 4 is installed by fitting the mounting holes 18 of the bottom plate 17 into the holes, the nuts 14 are screwed into the anchor bolts 3 and the bottom plate 17 is tightened, whereby the mounting of the steel column 4 is completed.

The steel column 4 is leveled by a height adjuster 5 at the center, and the degree of inclination and the direction are adjusted by tightening a nut 14 with an anchor bolt 3. This adjustment work is the same as the conventional one. After adjustment is completed in this way, formwork 16
The concrete 6 is poured into the inside, and as shown in FIG. 7, the base of the steel column including the bottom plate 17 is buried.
If the positioning tool is to be buried in the concrete 6, a large number of separate communication holes may be provided in addition to the bolt insertion holes 2, so that the concrete bites into the positioning tool through the communication holes, thereby contributing to an improvement in the strength of the concrete. it can.
A problem that has conventionally been encountered is the positioning operation for accurate placement of anchor bolts. ADVANTAGE OF THE INVENTION The positioning tool of this invention is supplied at low cost, and at the time of the installation work of an anchor bolt, it aims at reduction of labor and labor, shortening of operation time, and implement | achieves a highly accurate arrangement relationship.

The positioning tool of the present invention is not limited in shape or structure as long as it can easily, quickly and accurately set the anchor bolt as described above. For example, as shown in FIG. 8, an integrally molded positioning tool made of a thick foamed resin plate may be used. The positioning tool of this example has a plate shape having a uniform thickness, and has a convex portion 10 as a whole. With such a thick plate-shaped positioning tool, the nut fitting groove 12 can be easily formed, and the gauge groove 13 can be provided in the same manner as in the above-described example. Thin positioning tool (Fig. 1
8), it is difficult to bend the edge portion by providing a bent line portion. Therefore, in the example of FIG. 8, a portion corresponding to the bending is formed in a cutout shape in advance.

[0023]

According to the present invention, the installation work of the anchor bolt, which has conventionally required much labor and labor, is changed to a simple and quick operation. In addition, an accurate arrangement relationship of the anchor bolts can be easily realized. When the positioning tool of the present invention is a resin integrally molded product or a cellulose integral molded product,
Not only can it be supplied inexpensively and in large quantities, but also it is possible to easily form a nut fitting step, a gauge strip or a groove, which is difficult to form with conventional positioning tools. This nut fitting step makes the center of the insertion hole coincide with the center of the bolt regardless of the diameter of the anchor bolt used, and the gauge strip or the gauge groove enhances the positional accuracy of the positioning tool itself.

The economical effect is that the positioning tool which brings about such an improvement in operation can be supplied at lower cost by improving the productivity by integral molding and using an inexpensive material, unlike the conventional one. be able to. Furthermore, since it can be manufactured as a versatile positioning tool,
In addition to the efficiency of the installation work itself, there is an advantage that a positioning tool does not have to be separately provided for each construction as in the related art.
In addition, in the case of disposal after use, in addition to embedding together with concrete, a removal method such as cutting or incineration can be used, and there is an effect that versatility of actual work can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an anchor bolt positioning tool of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a perspective view showing a state in which an anchor bolt is being inserted into a bolt insertion hole arranged on a medium-sized virtual square frame line.

FIG. 4 is a perspective view corresponding to FIG. 3 showing a state in which an anchor bolt is being inserted into a bolt insertion hole arranged on a large virtual square frame line;

FIG. 5 is a perspective view showing a state in which anchor bolts have been installed from the state of FIG. 3;

FIG. 6 is a perspective view showing a state in which the height or the inclination is adjusted by tightening the height adjusting tool and each anchor bolt.

FIG. 7 is a perspective view showing a state in which the base of the steel column is filled with concrete after the adjustment is completed.

FIG. 8 is a perspective view showing another example of the anchor bolt positioning tool of the present invention.

[Explanation of symbols]

 2 Bolt insertion hole 3 Anchor bolt 7 Opening 9 Bending line 10 Convex part 11 Edge 12 Nut fitting step 13 Gauge groove S Small virtual square frame line M Medium virtual square frame line L Large virtual square frame line

Continuation of the front page (56) References JP-A-4-118465 (JP, A) JP-A-10-168893 (JP, A) JP-A-6-316939 (JP, A) JP-A-9-302674 (JP) JP-A-11-13065 (JP, A) JP-A-6-62103 (JP, U) Registered utility model 3000041 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 27/00

Claims (5)

(57) [Claims] 1. A bolt insertion hole is disposed at a position corresponding to a mounting hole provided in a bottom plate of a steel column to be supported, surrounding an opening provided at the center of the whole, and a nut fitting step is provided in the bolt insertion hole. An anchor bolt positioning tool formed of 2. The anchor bolt locating tool according to claim 1, wherein the whole is a concave-convex structure capable of being die-cut, and is an integrally molded product having a bolt insertion hole disposed in a concave portion to be grounded or a convex portion protruding upward. 3. The anchor bolt positioning tool according to claim 1, wherein the nut fitting step is formed in multiple stages corresponding to a plurality of types of nuts. 4. The anchor bolt positioning tool according to claim 1, wherein bolt insertion holes are arranged at positions corresponding to the mounting holes provided in each bottom plate of the plurality of types of steel columns. 5. An anchor bolt positioning tool according to claim 1, wherein a gauge strip or a gauge groove is provided to connect centers of the insertion holes of the bolt insertion holes arranged point-symmetrically.