JP2000008390A - Anchor device for column base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively improve fixing durability as an anchor device by composing fixing parts of anchor bolts in a connected form, and increasing rigidity of the fixing part itself. SOLUTION: A rectangular frame form fixing frame 2 is formed by integrally connecting at least adjacent vertical parts of frame parts comprising a cross sectional form having a horizontal part and a vertical part. Plural anchor bolts 3 are provided to stand on the fixing frame 2, and an additive plate 4 is disposed at upper parts of the anchor bolts 3 to form an anchor device 1 for a column base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column base structure made of steel or steel reinforced concrete. More specifically, the present invention relates to a column base anchor device for anchoring and supporting those column bases to foundation concrete.

[0002]

2. Description of the Related Art An anchor device for a column base of this type includes:
For example, a J-shaped anchor bolt having a hook at the lower end or an anchor bolt having a fixing plate at the lower end is buried in foundation concrete and fixed, and the base plate on the pedestal side is fixed to the anchor bolt. The form is conventionally used (JP-A-5-25832).
No.). Further, there is also known a form in which an anchor bolt provided with a fixing plate at a lower end portion is provided between an upper and a lower forming plate to form an anchor bolt frame, and the anchor bolt is fixed on a supporting anchor frame installed on a waste container. (Japanese Patent Laid-Open No. 1-146026).

Incidentally, the magnitude of the anchoring strength of the anchor device is determined not only by the strength against the tensile force in the axial direction acting via the respective anchor bolts, but also by the type in which the anchoring portion is formed by connecting the anchor bolts to each other. Is related to the rigidity of the fixing portion itself. That is, when a tensile force acts on a certain anchor bolt, the magnitude of the rigidity with respect to the bending moment acting on the fixing portion itself located between the other anchor bolts also affects the magnitude of the fixing resistance. However, with regard to the anchoring portion of the conventional anchor bolt, although sufficient consideration has been given to the strength of the anchor bolt against the tensile force in the axial direction, it is not always sufficient to improve the anchoring strength based on the rigidity of the latter anchoring portion itself. Was not taken into account. Incidentally, in the former conventional technique described above, since the fixing portions attached to each anchor bolt are independent from each other, there is no room for improving the fixing resistance from the above viewpoint. Also, in the latter prior art, no special consideration has been made from the viewpoint of effectively improving the fixing resistance based on the rigidity of the lower shape plate and the supporting frame.

[0004]

SUMMARY OF THE INVENTION In view of the above, the present invention has a structure in which fixing portions of anchor bolts are connected to each other, and more effectively increases the rigidity of the fixing portions themselves. It is an object of the present invention to provide an anchor device capable of effectively improving the fixing strength as an anchor device.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a rectangular frame formed by integrally connecting at least adjacent vertical portions of a frame portion having a cross section having a horizontal portion and a vertical portion. Technical means for forming a fixing frame for a pedestal by forming a plurality of anchor bolts on the fixing frame, and arranging an additional plate on top of the anchor bolts. It was adopted. As described above, the fixing frame is formed in a rectangular frame shape by integrally connecting the vertical portions of adjacent frame portions, and acts on the fixing frame based on the tensile force acting on the anchor bolt. Since the bending moment acts along the surface of the vertical portion, the rigidity against the bending moment can be more effectively improved. Therefore, the anchoring resistance of the anchor device can be improved in combination with the pull-out resistance by the horizontal portion. Further, if the fixing frame is supported via a supporting frame, and the two are integrally connected to each other to utilize the fixing action based on the supporting frame, the fixing resistance of the anchor device can be further enhanced.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a fixing frame having a rectangular frame shape by integrally connecting at least adjacent vertical portions of a frame portion having a cross section having a horizontal portion and a vertical portion as described above. If it is formed, the bending moment based on the tensile force acting via the anchor bolt acts along the vertically connected vertical portion as described above, so that the rigidity with respect to the bending moment is increased. It can be improved effectively. Regarding the way of connecting the vertical portions, they may be formed integrally from the beginning or may be integrated later by welding or the like. The vertical portions may be composed of a single row, or may be configured such that the vertical portions are arranged in parallel with each other so as to face each other in parallel, and anchor bolts are installed between the vertical portions. It is also possible to increase the fixing resistance by arranging the fixing frames in a plurality of stages in the vertical direction. The number of anchor bolts is not particularly limited.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an assembled state of an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in the middle of the assembly. In the drawings, reference numeral 1 denotes an anchor device for a column base according to the present invention. The anchor device 1 according to the present embodiment, which is fixed to a lower fixing frame 2 and fixed to the fixing frame 2 from above and below by nuts, is provided. Then 8 anchor bolts 3
And an attachment plate 4 disposed above the anchor bolt 3. Then, the anchor device 1 is installed at a predetermined height while coming out of a horizontal state through a supporting frame 5 installed at a predetermined position on a disposal container, and thereafter, the base concrete is cast as is well known. After the anchor device 1 is embedded and solidified, the column base is fixed to the head of the anchor bolt 3 exposed on the foundation concrete via the base plate. When the base plate is fixed, the base plate may be fixed with the additional plate 4 remaining, or may be detached and fixed. Moreover, it is also possible to constitute so that the attachment plate 4 is embedded in the foundation concrete. Further, if the fixing frame 2 is integrally connected to the supporting frame 5 by welding or the like, the fixing action based on the supporting frame 5 can be used in addition to the fixing action of the fixing frame 2, so that the fixing proof strength as the anchor device 1 is obtained. Can be further improved.

In this embodiment, when assembling the anchor device 1, first, as shown in FIG. 2, a horizontal member 6 made of an L-shaped steel or the like is fixed to a predetermined position on a scrap box by an appropriate fixing means. The supporting frame 5 is formed by arranging the vertical members 7 at four inner corners thereof to form the supporting frame 5. Thereafter, the vertical members 7 are welded to the vertical members 7 by welding or the like. A method of fixing the fixing frame 2 to a predetermined height while keeping the fixing frame 2 in a horizontal state is adopted. The vertical member 7 of the supporting frame 5 may be installed so as to support the fixing frame 2 from below or outside.

FIG. 3 is a plan view showing the fixing frame 2, and FIG. 4 is a partially enlarged view showing a section taken along line AA. As shown in FIG. 3, the fixing frame 2 in the present embodiment includes inner frame portions 8 to 11 and outer frame portions 12 to 15.
And are formed doubly. As shown in FIG. 4, each of the inner and outer frame portions 8 to 15 is formed in an L-shaped cross-sectional shape including horizontal portions 16 and 17 and vertical portions 18 and 19, respectively. Then, as shown in FIG. 3, at least the adjacent vertical portions 18, 19 of the inner and outer frame portions 8 to 15, that is, the respective corner portions, are integrally connected by welding or the like, and are fixed in a rectangular frame shape. A frame 2 is formed. In addition, a washer 20 is welded to the installation position of the anchor bolt 3 between the inner frame portions 8 to 11 and the outer frame portions 12 to 15, and the both are connected at a predetermined interval via the washer 20. .

The fixing frame 2 formed in the state shown in FIG. 3 is, as shown in FIG. 2 described above, opposed to the vertical member 7 of the supporting frame 5 installed at a predetermined position on the scrap box. It is fixed to a predetermined height by welding or the like via the inner frame portions 8 to 11. Thereafter, the insertion hole 21 of each washer 20 is inserted.
, The lower end of the anchor bolt 3 is inserted, and tightened and fixed by nuts 22 and 23 from above and below. Before or after this, the attachment plate 4 is also provided at the upper end of each anchor bolt 3, so that the upper end of each anchor bolt 3 is inserted into an insertion hole formed in the attachment plate 4, and the nut 24 is inserted from above and below. ,
25 to secure. Thus, each anchor bolt 3 is properly erected at a predetermined position, and the anchor device 1 is formed using the anchor bolts 3 themselves as pillars. Instead of the above procedure, the anchor bolts 3 are set up at predetermined positions with respect to the fixing frame 2 in advance, and the attachment plate 4 is inserted and fixed to the upper end portions of the anchor bolts 3 to mount the anchor device 1. After forming
It is also possible to move the anchor device 1 to the supporting frame 5 side and fix it at a predetermined position of the vertical member 7. Thereafter, as described above, the base concrete is cast, and the column base side is fixed to the head of the anchor bolt 3 which is exposed upward after solidification by a known procedure via a base plate. .

FIGS. 5 to 7 exemplify other embodiments relating to the fixing frame. The embodiment of FIG.
As shown in the figure, the vertical section 2 is formed by using inverted T-shaped frame sections 30 and 31 including vertical sections 6 and 27 and vertical sections 28 and 29.
The fixing frame 32 having a double structure is formed by opposing 8, 29 in parallel. In the embodiment shown in FIG. 6, a fixing frame 37 is formed by using a U-shaped frame portion 36 including a horizontal portion 33 and vertical portions 34 and 35. In this case, an insertion hole 38 for the anchor bolt 3 is formed in the horizontal portion 33, and if the strength of the horizontal portion 33 is sufficient, the washer is omitted, and the horizontal portion 33 is sandwiched between nuts from above and below. It is also possible to directly tighten and fix. The embodiment of FIG.
A fixing frame 43 is formed in a row using a frame portion 42 having a short piece portion 41 formed in a substantially L-shaped cross-sectional shape. In this case, the horizontal portion 3
An insertion hole is formed at a predetermined position of the fixing frame 43 by directly tightening and fixing the anchor bolt 3 inserted through the insertion hole from above and below using the nuts 44 and 45 with the horizontal portion 39 interposed therebetween. It will be erected.

FIG. 8 is an installation state diagram showing an installation state of another embodiment of the present invention. In this embodiment, the same components as those in the above-described embodiment of FIG.
Fixing frame 46 having the same configuration as fixing frame 2
And has a feature in that it has a two-stage structure. That is, the additional fixing frame 46 is formed integrally with the fixing frame 2 via the connecting member 47 and is supported via the supporting frame 5. As a result, the fixing force of the fixing frame 2 and the fixing force of the fixing frame 46 act on the anchor bolt 3, so that the fixing resistance is doubled. Note that the additional fixing frame 46 may be configured to be integrally fixed in the middle of the vertical member 7 constituting the supporting frame 5. Also in this case, the direct fixing power by the fixing frame 2 and
The fixing power of the fixing frame 46 via the supporting frame 5 can similarly increase the fixing resistance.

As described above, in the present invention, since at least the vertical portions of the frame portion constituting the fixing frame 2 are integrally connected, for example, as shown in FIG. F acts, so that
When a bending moment M about the joint between the other anchor bolt 3 and the fixing frame 2 acts on the frame between the two anchor bolts 3, the bending moment along the vertical portion of the frame is applied. M will work. Therefore, it is very easy to increase the rigidity of the fixing frame 2 against the bending moment M by selecting the thickness of the vertical portion and the width in the height direction. When the rigidity with respect to the bending moment M increases, the anchoring strength of the anchor device 1 naturally increases. Thus, according to the present invention,
The pull-out resistance force of the horizontal portion of the frame portion of the fixing frame 2 and the rigidity against the bending moment of the vertical portion are combined to reliably and effectively improve the fixing strength of the anchor device 1 with a simple configuration. Can be.
In addition, in the figure, 48 is discarded concrete, 49 is foundation concrete,
50 is a pillar, 51 is a base plate, and 52 is a grout material.

[0014]

According to the present invention, the rigidity in the vertical direction can be improved by integrally connecting at least the adjacent vertical portions of the frame portion having the cross-sectional shape including the horizontal portion and the vertical portion as described above. A large rectangular frame-shaped fixing frame is formed, and the bending moment based on the tensile force acting via the anchor bolt acts along the vertical part of the frame part, so the rigidity against the bending moment is more effectively improved. Therefore, the anchoring strength of the anchor device can be effectively improved in combination with the pull-out resistance of the horizontal portion of the frame portion. Therefore, it is possible to reduce the height of the anchor device. Furthermore, if the fixing frame is supported via a supporting frame and the two are integrally connected to each other to add a fixing action based on the supporting frame, the fixing resistance of the anchor device can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an assembled state of an embodiment of the present invention.

FIG. 2 is a perspective view showing a state during the assembly of the embodiment.

FIG. 3 is a plan view showing a fixing frame of the embodiment.

FIG. 4 is a partially enlarged view showing an AA cross section in FIG. 3;

FIG. 5 is a partially enlarged view showing another embodiment relating to a fixing frame.

FIG. 6 is a partially enlarged view showing another embodiment of the fixing frame.

FIG. 7 is a partially enlarged view showing another embodiment relating to a fixing frame.

FIG. 8 is an installation state diagram showing an installation state of another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Anchor device for column bases, 2 ... Fixing frame, 3 ... Anchor bolt, 4 ... Additional plate, 5 ... Supporting frame, 6
... horizontal member, 7 ... vertical member, 8-15 ... frame part, 16,
17 ... horizontal part, 18, 19 ... vertical part, 20 ... washer, 21
... insertion holes, 22 to 25 ... nuts, 26, 27 ... horizontal parts,
28, 29 ... vertical part, 30, 31 ... frame part, 32 ...
Fixing frame, 33: horizontal part, 34, 35: vertical part, 3
6 ... frame part, 37 ... fixing frame, 38 ... insertion hole,
39 ... horizontal part, 40 ... vertical part, 41 ... short piece part, 42 ... frame part, 43 ... fixing frame, 44, 45 ... nut,
46 ... fixing frame, 47 ... connecting member, 48 ...
49: foundation concrete, 50: pillar, 51: base plate, 52: grout material

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junji Ida 7-6-10 Hanahata, Adachi-ku, Tokyo (72) Inventor Takaaki Hirayama 1-4-15 Hiroo, Ichikawa-shi, Chiba Prefecture (72) Inventor Toru Watanabe Chiba Prefecture 1-4-15 Hiroo Ichikawa-shi (72) Inventor Masahiro Suzuki 1-99-5 Nishi-Shinjuku, Hasuda-shi, Saitama (72) Inventor Takeshi Hagino 4-7-1, Honcho, Koga-shi, Ibaraki F-term (reference) 2D046 AA01 2E125 AA04 AA14 AA46 BC09 BD01 BE04 CA04 CA90 EA12

Claims (2)

[Claims] 1. A rectangular frame-shaped fixing frame is formed by integrally connecting at least adjacent vertical portions of a frame portion having a cross-sectional shape having a horizontal portion and a vertical portion. An anchor device for a pedestal, characterized in that the anchor bolts of (1) and (2) are erected, and an attachment plate is disposed above the anchor bolts. 2. The pedestal according to claim 1, wherein said fixing frame is supported via a supporting frame, and both are integrally connected to each other to provide a fixing action based on said supporting frame. Anchor device.