JPH11217877A - Clamp hole gap filling member for anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp hole gap filling member to effectively use a gap part formed between a clamp hole formed in a base plate and an anchor bolt as a clearance for regulating a clamping position, and further simply effect a work to fit a gap filling member in a gap part and a position regulating work, and besides be modified such that a bending moment is not worked on the intermediate of the clamping part of an anchor bolt, and improve facility. SOLUTION: A clamping hole gap filling member for an anchor bolt consists of combination of a large gap filling member 1, formed approximately in a C-shape in cross section, and a small gap filling member. Further, an annular flange part 3 is formed at the upper part of a fit-in shaft part 2 of which the gap filling member consist, and the length of a fit-in shaft part 2 is set to length long enough to allow filling of the whole of the clamping hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel structure having a clearance formed between a fastening hole of a base plate and an outer peripheral portion of an anchor bolt when a steel frame is fastened and fixed to a foundation concrete. The present invention relates to a tightening hole gap filling member for an anchor bolt used to fill a gap of the anchor bolt and secure a good tightening state.

[0002]

2. Description of the Related Art In a work of fastening and fixing such a steel frame to a foundation concrete, in order to secure a good precision in the construction of the steel frame, for example, a steel plate is provided between a fastening hole formed in a base plate and an anchor bolt. It has been practiced to provide a clearance for adjusting a tightening position of about 20 mm. Therefore, a gap portion remains between the fastening hole of the base plate and the anchor bolt after the fastening as it is, and a stable and firm fastening state cannot be secured. Is used. In other words, a device using two ring-shaped or C-shaped gap filling members having a large diameter and a small diameter (Japanese Patent Application Laid-Open No. HEI 9-184203) or an upper portion of a cylindrical fitting shaft fitted into the gap. With a brim (Japanese Patent Laid-Open No.
-292772) and the like. However, since the former gap filling member does not have a brim portion,
The work of fitting into the gap between the tightening hole of the base plate and the anchor bolt and the work of adjusting its position are difficult to perform, and if it is left as it is, it will fall out of the gap, causing a problem in workability. In particular, when a C-shaped gap filling member was used, the problem was doubled. In addition, the latter gap filling member has a cylindrical fitting shaft portion that is fitted into the gap between the fastening hole of the base plate and the anchor bolt, and is shorter than the fastening hole. Since a gap remains between the fastening hole below the lower end and an external force such as an earthquake, a bending moment acts on the root portion of the anchor bolt located in the gap when an external force such as an earthquake is applied. Therefore, there has been a problem that the portion is susceptible to bending deformation by a smaller external force. In addition, since the cylindrical fitting shaft is formed in a ring shape, a constant dead space is formed on the thinner side, and the clearance for position adjustment is reduced accordingly. was there.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned technical circumstances, and tightens a gap formed between a fastening hole formed in a base plate and an anchor bolt. It can be effectively used as a clearance for position adjustment, and the work of inserting the gap filling member into the gap and the work of adjusting the position can be performed more easily, and a bending moment acts in the middle of the tightening portion of the anchor bolt. It is an object of the present invention to provide an easy-to-use tightening hole gap filling member which is improved so as not to be disturbed.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a large-gap filling member and a small-gap filling member, both of which have a substantially C-shaped cross section. In addition, an annular collar portion is formed on the upper portion of the fitting shaft portion constituting the gap filling member, and the length of the fitting shaft portion is formed at least on the base plate. The technical means of setting the entire fastening hole to a length that can be compensated was adopted.
As described above, since the gap filling member having a substantially C-shaped cross section is employed, the gap between the anchor bolt and the fastening hole can be effectively used as a clearance for adjusting the fastening position. Moreover, since the annular brim portion is formed on the upper part of the fitting shaft constituting the gap compensating member, the tightening force is applied via the brim portion despite the adoption of the gap compensating member having a substantially C-shaped cross section. Can be transmitted to the entire circumference, and the work of fitting into the gap and the work of adjusting the position can be easily performed. Furthermore, since the length of each fitting shaft portion is formed so as to be able to cover at least the entire gap between the fastening hole formed in the base plate and the anchor bolt, the fastening portion of the anchor bolt as in the prior art is formed. The disadvantage that a bending moment acts in the middle of the above is avoided. The outer diameter of the flange formed on the fitting shaft of the large-diameter gap filling member and the outer diameter of the flange formed on the fitting shaft of the small-diameter gap filling member are both the outer diameters of the flanges. Is set at least outside the tightening hole in each tightening state, the tightening force acting on the anchor bolt can be accurately distributed around the tightening hole.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be widely applied regardless of the size of a gap formed between a fastening hole of a base plate and an anchor bolt. Further, the present invention can be widely applied without being restricted by the type of the anchor bolt, for example, its sectional shape. Regarding the specific shape of the gap filling member, a substantially C-shaped cross section in which a part of the fitting shaft is opened so that the gap can be used more effectively as a clearance for adjusting the tightening position in a wider range. The specific size of the opening can be appropriately selected. As its manufacturing method, casting, die casting, powder metallurgy, or the like is preferable because of its complicated shape. In short, any method can be used as long as it can be formed from a material that can withstand the required compressive stress. As described above, the fitting shaft portion is formed in a substantially C-shaped cross section with a part opened.
The collar portion is formed in an annular shape that is horizontally continuous from above the fitting shaft portion. The outer peripheral shape of the collar portion may be circular or polygonal. Further, the inner peripheral shape of the collar portion may be formed in a circular shape along the inner peripheral surface of each fitting shaft portion, and a part of the circular shape is adjusted to the open end of the C-shaped cross section of the fitting shaft portion. A notch may be formed in the groove. Furthermore, it is also possible to provide knurls or irregularities on the outer surface by knurling or the like. When the gap filling member is used, after the column is installed at a predetermined position on the foundation concrete, the shape of the gap between the fastening hole formed in the base plate and the anchor bolt, that is, the eccentricity of the anchor bolt with respect to the fastening hole is set. Depending on the shape of the gap determined by the state, the anchor bolt is tightened by fitting and filling the gap while adjusting the relative positional relationship between the large diameter gap filling member and the small diameter gap filling member as described later. It is possible to install in a state where there is no play with respect to the perforated hole.

The outer diameter of the collar formed on the fitting shaft of the large-diameter gap filling member and the outer diameter of the collar formed on the fitting shaft of the small-diameter gap filling member are both changed. As an example of a case in which the outer peripheral portion is set so as to be located at least outside the tightening hole in each tightening state, a flange portion formed above a fitting shaft portion of the large-diameter gap filling member is provided. An outer diameter larger than the tightening hole is formed around an axial center of an outer peripheral surface of the fitting shaft portion, and a flange formed at an upper portion of the fitting shaft portion of the small-diameter gap filling member is provided in the housing hole, By forming the outer diameter larger than the value obtained by adding the eccentric amount of the receiving hole to the center of the outer peripheral surface of the fitting shaft portion and the diameter of the tightening hole, the entire outer diameter of the both flange portions can be reduced with a smaller outer diameter. The outer peripheral portion can always be located outside the fastening hole.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show embodiments of the large-diameter gap filling member, FIG. 1 is a perspective view, FIG. 2 is a plan view,
3 is a front view, and FIG. 4 is a bottom view. 5 to 8
FIG. 5 shows a perspective view, FIG. 6 is a plan view, FIG. 7 is a front view, and FIG.
Is a bottom view. In the figure, 1 is the large-diameter gap filling member,
The fitting shaft 2 has a substantially C-shaped cross section that is partially open, and an annular collar 3 integrally formed on the upper end of the fitting shaft 2. The fitting shaft portion 2 is formed to have an outer diameter that can be rotatably slidably fitted into a tightening hole formed in the base plate, has the same length as the tightening hole, and has an inward eccentricity. An accommodation hole 4 is formed at the position.
In the drawing, reference numeral 5 denotes the small-diameter gap filling member, which is a fitting shaft portion 6 having a substantially C-shaped cross section partially opened, and a ring formed integrally with the upper end portion of the fitting shaft portion 6. Of the collar part 7. The fitting shaft portion 6 is formed to have an outer diameter that can be rotatably slidably fitted into the housing hole 4, and has a length obtained by adding the thickness of the flange portion 3 to the length of the tightening hole. At the same time, an insertion hole 8 for an anchor bolt is formed at an inwardly eccentric position. In this embodiment, as shown in FIG.
A cutout is formed in a part of the inner circumferential circle of the flanges 3 and 7 so as to correspond to the opening of the fitting shafts 2 and 6. However, such a cutout may not be provided and a complete circle may be formed. In this embodiment, the diameter of the accommodation hole 4, that is, the outer diameter of the fitting shaft 6, is the difference between the diameter of the fastening hole and the diameter of the anchor bolt, ie, the maximum value of the gap. The size obtained by subtracting 1/2 was used.

9 to 11 show the use state of the above embodiment. FIG. 9 is a longitudinal sectional view, FIG. 10 is a plan view, and FIG.
FIG. 10 is a sectional view taken along the line AA indicated in FIG. 9. 9 to 11
The use state shown in (1) is an example in which the anchor bolt 9 is located at the center of the fastening hole 11 formed in the base plate 10. In the drawing, reference numeral 12 denotes a nut for fastening the anchor bolt 9. As shown in FIG. 9, in the used state, the fitting shaft 2 of the large-diameter gap filling member 1 and the fitting shaft 6 of the small-diameter gap filling member 5 tighten the fastening bolts formed on the anchor bolt 9 and the base plate 10. The entire gap between the hole 11 and the hole 11 is accurately filled. In this embodiment, as shown in FIG. 10, the brim portion 3 of the large-diameter gap filling member 1 is formed in a circular shape centered on the axial center of the outer peripheral surface of the fitting shaft portion 2, and the small-diameter gap filling member 5 is formed. The brim portion 7 described above is exemplified by a case where the flange portion 7 is formed in a circular shape around the axial center of the housing hole 4, that is, the outer peripheral surface of the fitting shaft portion 6. As shown in FIG. 11, a fastening hole 11 formed in an anchor bolt 9 in a base plate 10 is provided.
In this case, the fitting shaft portion 2 and the fitting shaft portion 6 may be arranged so as to be located on opposite sides of the anchor bolt 9.

FIGS. 12 to 16 show the arrangement of the fitting shaft 2 and the fitting shaft 6 in accordance with another positional relationship of the anchor bolt 9 with respect to the tightening hole 11 formed in the base plate 10. It is AA sectional drawing illustrated. 12 to 1
5 shows the case where the anchor bolts 9 are installed closest to the fastening holes 11, respectively. As shown in the figure, this case can be coped with by disposing the fitting shaft portion 2 and the fitting shaft portion 6 in the same direction. In the present invention, since the fitting shaft 2 and the fitting shaft 6 are formed in a substantially C-shaped cross section, a wide area until the anchor bolt 9 approaches or comes into contact with the inner peripheral surface of the tightening hole 11. The range can be used as an installation allowable range of the anchor bolt 9, that is, a clearance for adjusting the installation position. FIG. 16 shows an arrangement state of the fitting shaft portion 2 and the fitting shaft portion 6 when the anchor bolt 9 is located at another arbitrary portion, and is formed between the anchor bolt 9 and the fastening hole 11. The positions of the fitting shaft 2 and the fitting shaft 6 are adjusted according to the shape of the gap to be formed. Specifically, first, the outer fitting shaft portion 2, that is, the large-diameter gap filling member 1 side is fitted into the tightening hole 11 and rotated to one of them.
The open end rotates until it stops by contacting the outer peripheral surface of the anchor bolt 9. Thereafter, the fitting shaft portion 6, that is, the small-diameter gap filling portion member 5 is adjusted to the shape of the gap formed between the anchor bolt 9, the fitting shaft portion 2, and the tightening hole 11.
By fitting the side into the gap, the gap can be filled more accurately with the fitting shaft 2 and the fitting shaft 6.

FIG. 17 is a longitudinal sectional view showing a use state of another embodiment of the present invention. As shown, in this embodiment,
The length of the fitting shaft portion 14 of the large-diameter gap filling member 13 and the length of the fitting shaft portion 16 of the small-diameter gap filling member 15 protrude below the fastening holes 19 formed in the base plate 18 of the steel frame 17 in use. It has a feature in that the length is set, and there is no difference in the other configuration from the above-described embodiment. As described above, in the present embodiment, the lengths of the fitting shaft portions 14 and 16 have a margin, so that the adaptability to the thickness of the base plate 18 is large. In addition, in the figure, 20 is a foundation concrete 2
As is well known, a steel frame 17 is placed on the level adjusting mortar 20 and positioned at a predetermined position, and a gap between the anchor bolt 22 and the tightening hole 19 is provided. The fitting shaft portion 14 of the large-diameter gap filling member 13 and the fitting shaft portion 16 of the small-diameter gap filling member 15 are fitted into each other, tightened with the tightening nut 23, and the space between the foundation concrete 21 and the base plate 18 is removed. The grout material is injected around a mold (not shown).

[0011]

According to the present invention, the following effects can be obtained based on the above configuration. (1) Since the gap filling member having a substantially C-shaped cross section is employed, the gap between the anchor bolt and the fastening hole can be effectively used as a clearance for adjusting the fastening position. (2) Moreover, since an annular collar portion is formed above the fitting shaft portion having a substantially C-shaped cross section that constitutes the gap filling member,
The tightening force is accurately transmitted to the entire peripheral portion via the flange portion, and the entire upper peripheral portion of the fitting shaft portion having a substantially C-shaped cross section is positioned by the annular collar portion. , And the relative position adjustment between the gap filling members can be performed more easily. (3) Further, the length of each of the fitting shaft portions is set to be at least the same as the length of the fastening hole formed in the base plate when the fitting shaft portion is fitted into the gap portion, so that the entire gap portion is filled. As a result, the problem of bending moment acting in the middle of the anchor bolt tightening part as in the past has been resolved, and when an external force such as an earthquake is applied, the root of the anchor bolt is called a shear force. Acting in shape, a stable yield strength is more easily obtained. (4) The outer diameter of the collar formed above the fitting shaft of the large-diameter gap filling member and the outer diameter of the collar formed above the fitting shaft of the small-diameter gap filling member are determined in each fitting state. If the outer peripheral portion of the flange portion is set so as to be located outside the tightening hole, the tightening force acting on the anchor bolt can always be dispersed around the tightening hole. The acting shear stress can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a large-diameter gap filling member according to an embodiment of the present invention.

FIG. 2 is a plan view of the large-diameter gap filling member.

FIG. 3 is a front view of the large-diameter gap filling member.

FIG. 4 is a bottom view of the large-diameter gap filling member.

FIG. 5 is a perspective view showing a small-diameter gap filling member according to the embodiment of the present invention.

FIG. 6 is a plan view of the small-diameter gap filling member.

FIG. 7 is a front view of the small-diameter gap filling member.

FIG. 8 is a bottom view of the small-diameter gap filling member.

FIG. 9 is a longitudinal sectional view showing a use state of the embodiment.

FIG. 10 is a plan view of the same.

11 is a sectional view taken along the line AA indicated in FIG. 9;

FIG. 12 is an AA illustrating another use state of the embodiment.
It is sectional drawing.

FIG. 13 is an AA illustrating another use state of the embodiment.
It is sectional drawing.

FIG. 14 is an AA illustrating another usage state of the embodiment.
It is sectional drawing.

FIG. 15 is an AA illustrating another use state of the embodiment.
It is sectional drawing.

FIG. 16 is an AA illustrating another usage state of the embodiment.
It is sectional drawing.

FIG. 17 is a longitudinal sectional view showing a use state of another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Large diameter gap filling member, 2 ... Fitting shaft part, 3 ... Flange part, 4
... accommodation hole, 5 ... small diameter gap filling member, 6 ... fitting shaft part, 7 ...
Collar part, 8 insertion hole, 9 anchor bolt, 10 base plate, 11 tightening hole, 12 nut for tightening, 13
... Large-diameter gap filling member, 14 ... Fit shaft part, 15 ... Small diameter gap filling member, 16 ... Fit shaft part, 17 ... Steel frame, 18 ... Base plate, 19 ... Tightening hole, 20 ... Level adjustment mortar, 21 ... foundation concrete, 22 ... anchor bolts,
23 ... Tightening nut

Claims (2)

[Claims] 1. A substantially C-shaped cross section having an outer diameter capable of being rotatably slidably fitted into a tightening hole formed in a base plate and having a receiving hole formed at an eccentric position. A large-diameter gap filling member having an annular collar formed above a fitting shaft formed to have the same length as the above, and is rotatably slidably fitted into the accommodation hole formed in the large-diameter gap filling member. It has a substantially C-shaped cross-section having an outer diameter that can be adjusted, and an insertion hole for an anchor bolt is formed at an eccentric position, and the thickness of the collar portion of the large-diameter gap filling member is set to at least the length of the fastening hole. A combination of a small-diameter gap filling member having an annular collar formed on the upper part of the fitting shaft formed to have the added length, wherein a fastening hole formed in the base plate and the anchor bolt are formed. Fit into the clearance gap formed between A fastening hole gap filling member for an anchor bolt, which fills a gap. 2. The outer diameter of the collar formed on the fitting shaft of the large-diameter gap filling member and the outer diameter of the collar formed on the fitting shaft of the small-diameter gap filling member are determined by the fitting condition. 2. The gap filling member for a fastening hole of an anchor bolt according to claim 1, wherein the outer peripheral portions of the flange portions are both set at least outside the fastening hole.