JP2600119Y2 - PC board mounting tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC board mounting technique for fixing a precast concrete board (hereinafter referred to as PC board) to a beam such as a steel beam.

[0002]

2. Description of the Related Art FIGS. 11 and 12 show conventional PC board mounting means. In the former case, a front plate 102 is inserted through a horizontal portion of an L-shaped stick anchor 101, and a mounting screw portion 103 is formed at a protruding portion thereof. In the latter case, a fixing plate 105 is fixed to an anchor bolt 104, a front plate 106 is inserted through a tip end of the anchor bolt 104, and a mounting screw portion 107 is formed at a protruding portion thereof. In these components, anchor portions are buried in the PC plate 108 with the front plates 102 and 106 as boundaries, respectively, and the PC plate is attached to a beam (not shown) via projecting attachment screw portions 103 and 107.

[0003]

By the way, in the former prior art, the radius of curvature of the bent portion of the L-shaped stick anchor 101 is usually 2 mm of its shaft diameter due to processing restrictions.
Since the thickness is set to about twice, when the thickness of the PC board 108 is small, fogging may not be sufficiently obtained in some cases. Further, in the latter conventional technique, the anchor bolt 104 is supported in a cantilever manner with respect to the fixing plate 105. Therefore, regardless of an out-of-plane force, the anchor bolt 104 and the fixing plate 105 are connected to each other by an in-plane force. There is a problem that it is unstable with respect to the acting bending moment. Furthermore, when an auxiliary reinforcing bar is installed to reinforce the anchor effect, the number of joints for fixing the auxiliary reinforcing bar is small, so not only is the fixing operation difficult, but also the degree of freedom in selecting the installation position is increased. There was also a problem that there was almost no. For this reason, even in the latter conventional technique, when the thickness of the PC board 108 is small, there is a problem that the cover may not be sufficiently covered with the auxiliary reinforcing bar. The present invention has been made in view of such a point, and its purpose is to easily cover a buried portion buried in a PC board with a simple configuration and to reduce in-plane force. Even if an auxiliary reinforcing bar is attached, the work is easy, the degree of freedom in selecting the installation position is large, and it is easy to arrange the reinforcing bar suitable for the thickness of the PC board. Another object of the present invention is to provide a simple PC board mounting tool.

[0004]

According to the present invention, in order to solve the above-mentioned problems, the width of a shaft of an anchor bolt having a mounting screw portion at a tip portion is narrowed along the axis toward the mounting screw portion. A technical means of fixing a flat anchor plate having a slope portion is adopted. The anchor plate may be formed with an insertion hole for inserting a reinforcing bar or a bent piece.

[0005]

According to the present invention, since the anchor plate is fixed along the axis of the anchor bolt, not only the joint portion for fixing can be long, but also the drag force in the in-plane direction of the PC plate is increased by the anchor plate. I can take it. In addition, since a narrow slope portion is formed at the side end portion of the anchor plate toward the mounting screw portion side, an anchoring action in an out-of-plane direction can be obtained by a pull-out resistance force based on the slope portion. Further, the drag in the out-of-plane direction can be reinforced by a reinforcing bar attached to the anchor plate or a fixing plate attached to the end of the anchor bolt.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a side view showing a mounted state, FIG. 2 is a side view showing a mounting tool, and FIG. 3 is a plan view of the mounting tool. It is.
In the figure, reference numeral 1 denotes a PC plate, and 2 denotes a beam material such as a steel beam. An L-shaped support member 3 is fixed to the beam member 2 through a long hole 4 by a bolt 5 and a nut 6 so as to be adjustable in the front-rear direction. Further, a long hole 7 through which an anchor bolt described later is vertically adjustable is formed in a vertical portion of the support fitting 3.

In FIG. 1, reference numeral 11 denotes a mounting tool, which is composed of an anchor bolt 12, an anchor plate 13, and a front plate 14. The anchor bolt 12 has a mounting screw portion 12a formed at the tip and a shaft portion 12 buried in the PC board 1.
b. As shown in FIG. 3, in this example, the anchor plate 13 is composed of left and right flat plates 13A and 13B each having a narrow slope portion 13a formed at a side end toward the mounting screw portion 12a. The left and right flat plates 13A, 13A constituting the anchor plate 13
B has an appropriate number of insertion holes 15 for inserting reinforcing bars. The left and right flat plates 13A, 13A
B may be integrally connected outside the end of the shaft portion 12b of the anchor bolt 12, as indicated by a two-dot chain line. These flat plates 13A and 13B are fixed to the shaft 12b of the anchor bolt 12 along its axis by welding or the like. Further, in the case of this example, the front plate 14 curved in the vertical direction is inserted and fixed to the shaft portion 12 b of the anchor bolt 12.

As shown in FIG. 1, the mounting tool 1 has the shaft portion 12b of the anchor bolt 12 buried in the PC board 1 in advance with the front plate 14 as a boundary. In mounting the PC board, the mounting screw portion 12a of the anchor bolt 12 is inserted into the long hole 7 of the support fitting 3 and is supported by the nut 16 via the washer 17 so as to be able to move up and down. Is attached to the beam 2 side. In this case, in this example, since the front plate 14 is curved, the state of contact with the vertical surface of the support fitting 3 is a line contact, so that the contact portion is free from rotation in the out-of-plane direction of the PC board 1. The degree is added. The front plate 14 may be changed to a flat plate, or may be omitted when the anchor plate 13 is buried in a direction orthogonal to the long hole 7 as in this example. . Further, in order to reduce the friction coefficient of the sliding surface between the support fitting 3 and the washer 17, a sliding material can be interposed or a surface treatment can be performed. In the drawing, reference numeral 18 denotes a reinforcing bar for reinforcing the PC board in the out-of-plane direction. Since the reinforcing bar 18 is attached using the anchor plate 13, there is a wide range of freedom in selecting the mounting position, and the attaching operation is easy.

FIGS. 4 to 6 show a second embodiment of the present invention. FIG. 4 is a front view, FIG. 5 is a side view, and FIG. 6 is a plan view. In the figure, reference numeral 21 denotes a mounting tool, and an anchor bolt 22
And two anchor plates 23 and 24 fixed to the anchor bolt 22. Anchor bolt 2
2 is a mounting screw part 22a formed at the tip end and the PC board 1
It is composed of a shaft portion 22b embedded therein. The anchor plates 23 and 24 are formed in the same shape, have curved portions 23a and 24a and inclined portions 23b and 24b that come into contact with the vertical surface of the support fitting 3, and have a substantially trapezoidal planar shape as shown in FIG. Is formed. In the drawing, reference numeral 25 denotes an insertion hole for inserting a reinforcing reinforcing bar. These anchor plates 2
The reference numerals 3 and 24 are fixed to the shaft portion 22b of the anchor bolt 22 along the axis thereof and vertically in parallel with the shaft portion 22b interposed therebetween. In mounting the PC board, the mounting screw portion 22a of the anchor bolt 22 is inserted into the long hole 7 of the support fitting 3, and the curved surface portions 23a formed on the upper and lower anchor plates 23 and 24 are vertically attached to the support fitting 3. The PC board can be attached to the beam 2 by supporting the nut in a state where it can move up and down while being in contact with the surface.

FIG. 7 is a front view of a third embodiment of the present invention. The mounting tool 31 of the present embodiment is a modified example of the second embodiment, and is a curved surface portion 3 of anchor plates 33, 34 fixed vertically and in parallel across an anchor bolt 32.
3a and 34a are bent to form a bent piece 33
b and 34b. As described above, the bent piece portions 33b and 34b in the present embodiment are formed by bending both side portions outside the curved surface portions 23a and 24a of the anchor plate of the second embodiment. A slope similar to the slopes 23b and 24b is formed. Further, the bending lines of the bent pieces 33b, 34b can be inclined with respect to the axis of the anchor bolt 32. In this case, the bent pieces can further enhance the anchoring action in the out-of-plane direction.

FIGS. 8 to 10 show a fourth embodiment of the present invention. FIG. 8 is a front view, FIG. 9 is a side view, and FIG. 10 is a plan view. In the drawing, reference numeral 41 denotes a mounting tool, which is composed of an anchor bolt 42, a vertical anchor plate 43 and a horizontal anchor plate 44 fixed to the anchor bolt 42 in an orthogonal state. Anchor bolt 42
Is composed of a mounting screw portion 42a formed at the tip and a shaft portion 42b embedded in the PC board 1. As shown in FIG. 9, the vertical anchor plate 43 is composed of an upper flat plate 43A and a lower flat plate 43B, each of which has a curved surface portion 43a and an inclined surface portion 43b which are in contact with the vertical surface of the support fitting 3. Is formed. In the figure, 45
Is an insertion hole for inserting a reinforcing steel bar. As shown in FIG. 10, the anchor plate 44 in the left-right direction has a curved surface portion 44a and an inclined surface portion 44b that contact the vertical surface of the support fitting 3.
And is formed by a single flat plate integrally formed on the left and right by connecting the outside of the end of the shaft portion 42b of the anchor bolt 42. In the drawing, reference numeral 46 denotes an insertion hole for inserting a reinforcing reinforcing bar. These anchor plates 43, 44 are attached to the shaft 42b of the anchor bolt 42 along the axis thereof and in FIG.
As shown in FIG. Therefore, the mounting tool 41 has a large resistance in the horizontal and vertical directions. When mounting the PC board, the mounting screw portion 42a of the anchor bolt 42 is inserted into the long hole 7 of the support fitting 3, and the curved surface portion 43 formed on the anchor plate 43 is formed.
By supporting a in a state in which it can be moved up and down by a nut in a state where a is in contact with the vertical surface of the support fitting 3,
A PC board can be attached to the beam 2 side.

In the above description of the fourth embodiment, the anchor plate is composed of the vertical anchor plate 43 and the horizontal anchor plate 44 which are perpendicular to each other. It is also possible to form a fixture by fixing radially one-sided anchor plate pieces such as the flat plates 43A and 43B around the shaft of the anchor bolt. In addition to the case of the second embodiment, a bent piece portion may be formed by bending from the middle of the anchor plate as needed. Needless to say, the specific shape of the anchor plate, such as the planar shape and the plate thickness, can be changed in design.

[0013]

According to the present invention, the following effects can be obtained based on the configuration. (1) Since the shaft portion of the anchor bolt does not have a curved portion unlike a conventional stick anchor, sufficient cover can be easily secured even when the PC board is small in thickness. (2) With a simple structure in which the anchor plate is fixed to the shaft portion of the anchor bolt along the axis thereof, a reliable anchoring effect in the in-plane direction can be obtained. (3) Since a narrow slope portion is formed at the side end portion of the anchor plate toward the mounting screw portion side of the anchor bolt, the anchoring effect in the out-of-plane direction can be enhanced by the pull-out resistance force based on the slope portion. (4) When a reinforcing bar is provided, an anchor plate can be used, so that not only the work is easy, but also the degree of freedom in selecting an installation position is large, so that it is suitable for the thickness of the PC board. Bar arrangement is possible.

[Brief description of the drawings]

FIG. 1 is a side view showing a mounting state of a first embodiment of the present invention.

FIG. 2 is a side view of the mounting tool of the first embodiment.

FIG. 3 is a plan view of the first embodiment.

FIG. 4 is a front view of a second embodiment of the present invention.

FIG. 5 is a side view of the second embodiment.

FIG. 6 is a plan view of the second embodiment.

FIG. 7 is a front view of a third embodiment of the present invention.

FIG. 8 is a front view of a fourth embodiment of the present invention.

FIG. 9 is a side view of the fourth embodiment.

FIG. 10 is a plan view of the fourth embodiment.

FIG. 11 is a side view of a conventional example.

FIG. 12 is a side view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... PC board, 2 ... Beam material, 3 ... Support bracket, 4 ... Long hole, 5 ...
Bolt, 6 nut, 7 slot, 11 mounting fixture, 12
... Anchor bolt, 12a ... Mounting screw part, 12b ... Shaft part, 13 ... Anchor plate, 13a ... Slope part, 14 ...
Front plate, 15: insertion hole, 16: nut, 17: washer, 18: rebar, 21: mounting tool, 22: anchor bolt, 23, 24: anchor plate, 23a, 24
a: curved surface portion, 23b, 24b: slope portion, 25: insertion hole,
31: mounting tool, 32: anchor bolt, 33, 34 ...
Anchor plate, 33a, 34a ... curved surface portion, 33b,
34b: bent piece portion, 41: mounting tool, 42: anchor bolt, 43, 44: anchor plate, 43a, 44
a: curved surface portion, 43b, 44b: slope portion, 45, 46 ... insertion hole

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-54-104610 (JP, A) JP-A-61-159511 (JP, U) JP-A-61-206414 (JP, U) JP-A-58 190112 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1/38-1/41 502 E04B 2/92-2/94

Claims (3)

(57) [Scope of request for utility model registration] A flat anchor plate having a narrow slope formed along an axis thereof toward the mounting screw portion is fixed to a shaft portion of an anchor bolt having a mounting screw portion at a distal end portion. A PC board mounting tool characterized by the above-mentioned. 2. The PC board mounting tool according to claim 1, wherein an insertion hole for inserting a reinforcing bar is formed in the anchor plate. 3. The PC board mounting tool according to claim 1, wherein a bent piece is formed on the anchor plate.