JP5489893B2 - Bracket for prop support - Google Patents

Description

  The present invention relates to a bracket for holding a pillar such as a handrail, and more particularly to a structure that can be easily positioned and fixed with respect to an anchor bolt standing from a concrete frame.

  Conventionally, brackets for supporting pillars such as handrails are made by drilling holes in the frame concrete, standing anchor bolts, inserting the anchor bolts through the bracket's through holes, attaching washers, and finally tightening them with nuts. If it was fixed to concrete, but the rebar is buried in the drilling position of the frame concrete, the position where the anchor bolt is to be drilled must be shifted, the anchor bolt standing position and the bracket There was a problem that the positional relationship with the through-holes was shifted.

  Therefore, by setting the through hole of the bracket wider than the diameter of the anchor bolt, it corresponds to the positional deviation from the standing position of the anchor bolt (see, for example, Patent Document 1 below), and the area of the washer is set to the size of the through hole. In addition, measures were taken to make it wide in the front, rear, left and right.

JP-A-8-246633

  However, depending on the position of the anchor bolt, there is a case where a part of the washer protrudes from the surface of the bracket together with the width of the washer. Even if the insertion hole of the washer is a long hole, it depends on the periphery of the through hole. There is a possibility that the area of the washer becomes non-uniform depending on the direction, and as a result, there is a case where the fixing strength of the bracket to the concrete is hindered.

  In addition, since a relatively wide surplus space is generated around the anchor bolt inside the through hole of the bracket, the position after the bracket is installed on the anchor bolt can be simply determined by pressing in the thickness direction of the bracket with a washer with a large area. There was a problem that displacement could not be prevented reliably.

  The present invention has been made in view of the above circumstances, and depends on the size of the washer while corresponding to the misalignment between the standing position of the anchor bolt and the through hole of the bracket due to the bar arrangement in the frame concrete. It is an object of the present invention to provide a support column holding bracket that can secure the fixing strength of the bracket to the concrete without the need to prevent the positional displacement of the anchor bolt after the bracket is installed.

A support column holding bracket according to the present invention that solves the above-described problem includes a bracket body having a support column attachment portion and a spacer.
The bracket body has a circular through-hole penetrating the front and back, and the spacer is rotatably fitted in the through-hole of the bracket body. The spacer is inserted through an anchor bolt raised from the concrete frame, and the radius of the through-hole is inserted. And a flange portion covering the surface of the bracket main body, and the spacer is pressed by a nut screwed to an anchor bolt to be fastened to the concrete frame.

Specifically, it comprises a base plate seated on a concrete frame, a bracket body made of an aluminum extruded profile placed on the base plate, and a spacer attached to the bracket body. In order to adjust the inclination angle of the direction, there is a structure in which the bracket main body and the base plate have curved sliding surfaces at the contact portions (the lower surface of the bracket main body and the upper surface of the base plate).
The bracket body has a base portion and a column mounting portion that rises from the base portion, and includes, for example, an aluminum extruded shape having a substantially U-shaped cross section.

The base portion of the present embodiment has circular holes penetrating the front and back at a plurality of positions in the longitudinal direction, and the base plate is substantially the same as the circular hole by sliding between the bracket body and the base plate at a plurality of positions in the longitudinal direction. It has a structure having a lower through-hole penetrating the overlapping region on the front and back.
The spacer is rotatably fitted in the circular hole of the bracket body, and the spacer according to the present embodiment is inserted in an anchor bolt that stands up from the concrete frame and passes through the lower through hole and the circular hole. It has a long hole that traverses from the center to the periphery of the hole, and is fastened to the concrete frame by pressing the spacer with a nut screwed to the anchor bolt.

  In the support column holding bracket according to the present invention, the bracket body has a circular hole penetrating the front and back, and the spacer fitted into the circular hole has a long hole through which the anchor bolt is inserted. The anchor bolts can be transferred within the overlapping range, and even when the anchor bolts are transferred due to the reinforcement arrangement of the frame concrete, the bracket body can be used without being newly processed.

  The long hole of the spacer restricts the movement of the inserted anchor bolt only in the substantially radial direction of the circular hole, and the spacer is rotatably fitted in the circular hole of the bracket body. By simply rotating the spacer and adjusting the direction of the long hole, the position of the long hole can be quickly adjusted to the position of the anchor bolt. Can be prevented by the edge of the long hole in contact with the anchor bolt.

  Thus, the support bracket according to the present invention is not only provided with a practical tolerance for shifting or moving the standing position of the anchor bolt, but only by tightening a nut screwed to the anchor bolt after the positioning step. The bracket can be prevented from floating or misaligned with respect to the concrete frame, and a stable fixing strength can be maintained with uniform pressure applied to the periphery of the circular hole.

  Furthermore, if an aluminum extruded profile is used for the bracket body, it is relatively easy to mass-produce members of the desired shape with accurate dimensions at a low cost, and a stable support strength over the long term due to the corrosion resistance of the aluminum alloy. Can be maintained. Further, by extruding in a substantially U shape, a high support strength can be achieved by sharing the bending strength of each surface with each other.

FIG. 1 shows an example of a support holding bracket according to the present invention, in which (A) is a plan view, (B) is a longitudinal sectional view, (C) is a transverse sectional view, and (D) is a plan view of a bracket body. . The spacer in the support | pillar holding bracket by this invention is shown, Comprising: (A) is a 1st top view, (B) is a perspective view of (A), (C) is a 2nd top view, (D) is a perspective view of (C), and (E) is a longitudinal sectional view. It is a side view which shows the example of an embodiment of the support | pillar holding bracket by this invention. It is process drawing which shows an example of the attachment method of the support | pillar holding bracket by this invention. It is a disassembled perspective view which shows the example of an embodiment of the support | pillar holding bracket by this invention. It is a principal part side view which shows the example of an embodiment of the support | pillar holding bracket by this invention. It is a principal part side view which shows the example of an embodiment of the support | pillar holding bracket by this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a column holding bracket according to the present invention will be described below with reference to the drawings.
The support column holding bracket according to the present invention includes a bracket body 1 and a spacer 2 (see FIG. 1).
The bracket main body 1 in the present embodiment is fixed to an existing or new concrete frame 3 and functions as a base of a support column 4, and includes a base portion 1 a that is fastened to an anchor bolt 5 that stands up from the concrete frame 3. , And a support column mounting portion 1 b that supports the support column 4.

The base portion 1a includes one or a plurality of circular through holes 1c penetrating the front and back.
The through-hole 1c is for inserting the anchor bolt 5 erected from the concrete housing 3, and its size is such that the position of the anchor bolt 5 in the opening range is at least the thickness of the reinforcing bar 6, preferably the reinforcing bar. It is a thing which can be moved by the thickness of several 6 (refer FIG. 1). That is, the through-hole 1c is formed in such a size that it can be inserted even when the anchor bolt 5 is misaligned with respect to the bracket body 1 installed in the concrete housing 3 in a positioned state.
In the present embodiment, three equal through holes 1 c are provided at equal intervals along the longitudinal direction of the bracket body 1.

  The column attachment portion 1b in the present embodiment is configured to sandwich the column 4 with a pair of upright pieces 1ba and 1bb standing upright from both side edges of the base portion 1a, and the column 4 held between the indoor side upright pieces 1ba. Is provided with a support hole 8 through which a bolt 7 is inserted, and a standing portion 1bb on the outdoor side is provided with a cutout portion 1d through which a connecting member 10 that supports the retaining column 9 is passed (see FIG. 3).

  The bracket body 1 configured as described above is formed of an aluminum extruded shape having a substantially U-shaped cross section by a base portion 1a and a pair of upright pieces 1ba and 1bb (post mounting portions 1b) rising from the base portion 1a. Yes. In this case, the bracket body 1 is alumite-treated not only on the outside but also on the inside, and has sufficient corrosion resistance. In addition, the bracket body 1 is obtained by cutting an aluminum extruded shape into a short shape. Even if rainwater enters inside, the rainwater that has entered the outside flows out from both ends in the longitudinal direction. It does not collect inside the main body 1.

In the present embodiment, the base portion 1a and the column attachment portion 1b can be integrally formed as an aluminum extruded shape member having a substantially U-shaped cross section.
On the other hand, as another form of the bracket body 1, a support column 4 provided with an upright piece 1 ba standing upright from the side edge on the indoor side of the base portion 1 a is provided. It is also possible to adopt a structure in which the support 4 is supported by being clamped by the back plate 15 applied to the hollow inner surface or the outer surface on the outdoor side and the standing piece 1ba and tightened with the bolt 7 (see FIG. 7). At that time, it is necessary to increase the thickness of the upright piece 1ba as compared with the bracket main body 1 (see FIG. 6) 1 having a substantially U-shaped cross section because of the strength burden.
In this way, even if the bracket body 1 is an extruded profile having a substantially L-shaped cross section, rainwater or the like is drained from the side on the bracket.

  The spacer 2 is rotatably fitted in the through hole 1c of the bracket body 1 so as to fill the surplus space of the through hole 1c, and the shaft portion 2a with the top plate 2e fitted in the through hole 1c and the shaft portion 2a A flange portion 2b that protrudes laterally from the top plate 2e and sits on the surface of the bracket body 1 is integrally provided, and is made of aluminum or stainless steel having high corrosion resistance (see FIG. 2).

The shaft portion 2a in the present embodiment has a cylindrical shape lower than the depth of the through hole 1c, and the top plate includes a long hole 2c through which the anchor bolt 5 erected from the concrete housing 3 is inserted.
The long hole 2c passes through the front and back of the shaft portion 2a and includes a portion along the radius of the shaft portion 2a. The long hole 2c substantially traverses from the center of the through hole 1c to the peripheral edge, that is, at the center of the shaft portion 2a. It is assumed that a space for inserting the anchor bolt 5 is secured and extends from the center of the shaft portion 2a toward at least one of the centrifugal directions.

  Specifically, for example, the length of the long hole 2c may be either a radius (see FIG. 2 (C)) or a diameter (see FIG. 2 (A)). Further, it may be in a bow-shaped or arc-shaped extending shape, or in a spiral-shaped shape, and further, in a V shape or a circular hole shape in which a long hole 2 c corresponding to two radii is connected at the center of the shaft portion 2 a. There may be. In the present embodiment, a long hole 2c is formed that crosses the inside of the peripheral wall 2d of the shaft portion 2a along the diameter of the shaft portion 2a (see FIGS. 2A and 2C).

The shaft portion 2a serves as a rotation shaft that changes the phase of the long hole 2c while maintaining the center of the spacer 2 with the rotation. Therefore, the shape of the shaft portion 2a is not limited to a cylindrical shape, and may be a shape that fits into the circular through hole 1c and rotates without eccentricity or vibration, such as a circular or regular polygonal cylinder or column. It ’s fine.
In order to enhance the effect of regulating the movement of the anchor bolt 5, it is desirable that the width of the long hole 2 c be substantially equal to the diameter of the anchor bolt 5, that is, have a clearance equivalent to that of the fool hole.

The flange portion 2b in the present embodiment is concentrically projected from one end portion of the shaft portion 2a to the side, and receives the pressure received from the nut 11 screwed to the anchor bolt 5 from the bracket body 1. Play a role to tell. That is, by tightening the nut 11, the bracket body 1 is fixed to the concrete frame 3 via the flange portion 2 b.
The shape of the flange portion 2b is not limited to a concentric circle shape, and may be any shape that can uniformly pressurize the peripheral edge portion of the through hole 1c, such as a regular polygonal cylinder or columnar shape having the same center as the shaft portion 2a. good.

The support column holding bracket according to the present invention is configured as described above, and is fixed to the concrete frame 3 through the following steps (see FIG. 4).
First, a mark (protruding) is made in advance on the position where the anchor bolt 5 is erected on the concrete frame 3 (see FIG. 4A), and a hole 3a is drilled at the marked position. At this time, when the drill hits the reinforcing bar 6 embedded in the concrete frame 3, a hole 3a is made in the vicinity of the mark so as to avoid the reinforcing bar 6 (see FIG. 4B). And the anchor bolt 5 is fixed so that it may not detach | leave to the hole 3a opened in the concrete housing 3, and the foundation | substrate which fixes a support | pillar holding bracket is finished (refer FIG.4 (C)).

Next, the bracket main body 1 is attached to the anchor bolt 5 erected from the concrete housing 3. At that time, the displacement of the anchor bolt 5 due to the avoidance of the reinforcing bar 6 is allowed due to the excessive size of the through-hole 1c. (See FIG. 4D).
When the fixing position of the bracket body 1 is determined, the spacer 2 is attached to the through hole 1c so as not to shift the position. At that time, due to the structure of the spacer 2, the anchor bolt 5 passes through the long hole 2c of the spacer 2 attached to the through hole 1c in any direction in which the spacer 2 rotates (see FIG. 4E). .

  Finally, a washer 12 and a nut 11 are attached to the anchor bolt 5 that has passed through the elongated hole 2c of the spacer 2 (see FIG. 4F), and the nut 11 is tightened to gradually increase the pressure applied to the spacer 2, and the bracket. Temporarily fix the main body 1 to the proper position. When the position is determined, the nut 11 is finally tightened to complete the fastening of the column holding bracket according to the present invention to the concrete frame 3 (see FIGS. 1A and 1B).

As described above, with the final tightening of the nut 11, the flange portion 2 b pressurizes the base portion 1 a toward the concrete housing 3 so that the column holding bracket does not float from the concrete housing 3.
At the same time, the peripheral edge of the long hole 2c through which the anchor bolt 5 is passed is in contact with the side surface of the anchor bolt 5 according to the direction of the long hole 2c, and the anchor bolt 5 is not relatively displaced from front to back and left and right other than the direction of the long hole 2c. Thus, the movement of the support bracket is restricted.
In this way, despite the secure fastening in the up, down, front, back, left, and right directions, the positional relationship between the plurality of anchor bolts 5 can be quickly compared with the positional relationship between the plurality of anchor bolts 5 by a simple operation of rotating the spacer 2. Since they can be combined, an extremely high practical effect is achieved.

In the present embodiment, in view of the inclination of the concrete frame (parapet) 3, a structure in which the mounting angle of the bracket body 1 can be adjusted is also possible.
This example employs a structure including a bracket main body 1 made of an aluminum extruded profile having a substantially U-shaped cross section, a base plate 14 on which the bracket main body 1 is placed, and a spacer 2 similar to the previous example.

The bracket main body 1 of this example has the support | pillar attaching part 1b and the base part 1a similarly to the previous example.
This example is the same as the previous example in the column mounting portion 1b, but the base portion 1a has circular through holes 1c penetrating the front and back at a plurality of locations in the longitudinal direction, and on the base plate 14. It has a sliding surface 1e that comes into close contact with the base plate 14 when sliding.
The sliding surface 1e is a curved surface that is curved with a uniform curvature over the entire length like the side surface of a cylinder.

The base plate 14 is made of aluminum or stainless steel having high corrosion resistance, has a lower surface as a fixing surface in contact with the concrete housing 3, and has a complementary sliding surface 14 a in close contact with the sliding surface 1 e of the bracket body 1 on the upper surface.
Further, the base plate 14 has lower through holes 14b penetrating the front and back at a plurality of locations in the longitudinal direction. The lower through-hole 14b has a width over substantially the entire region of the region that substantially overlaps the through-hole 1c of the bracket body 1 when sliding between the bracket body 1 and the base plate 14 (see FIG. 4D).

  The bracket body 1 and the base plate 14 slide following the bending of the sliding surfaces 1e and 14a, and the mounting angle of the bracket body 1 with respect to the base plate 14 changes. An upright angle corresponding to the inclination of can be obtained.

  In the present embodiment, the support column 4 is sandwiched between a pair of upright pieces 1ba and 1bb constituting the support mounting portion 1b, the bolt 7 is inserted into the support hole 8 provided in the upright piece 1ba on the indoor side, and the support column 4 is tightened. To wear. Further, the lower part of the retaining pillar 9 is fastened to the horizontal anchor bolt 13 projecting from the concrete housing 3 toward the outdoor side, and the upper part of the retaining pillar 9 and the pillar 4 are fastened via the connecting member 10. This reinforces the support strength of the support (see FIGS. 3 and 5).

1 Bracket body,
1a base part,
1b Standing part, 1ba Standing piece (indoor side), 1bb Standing piece (outdoor side),
1c through hole, 1d notch, 1e sliding surface (bracket body),
2 spacers,
2a shaft part, 2b flange part, 2c long hole, 2d peripheral wall, 2e top plate,
3 concrete frame, 3a hole,
4 struts, 5 anchor bolts, 6 rebars,
7 bolts, 8 support holes, 9 standoffs, 10 connecting materials,
11 nuts, 12 washers,
13 Horizontal anchor bolt,
14 base plate, 14a sliding surface (base plate), 14b lower through hole,
15 Back plate,

Claims (1)

A base plate seated on the concrete frame, a bracket body made of an aluminum extruded profile placed on the base plate, and a spacer attached to the bracket body,
The lower surface of the bracket body and the upper surface of the base plate abut on a curved sliding surface that adjusts the inclination angle in the inner and outer directions of the bracket body,
The bracket body has a base portion and a column mounting portion that rises from the base portion,
The base portion has a circular hole penetrating the front and back at a plurality of locations in the longitudinal direction,
The base plate has lower through-holes penetrating the front and back regions that overlap the circular holes by sliding between the bracket body and the base plate at a plurality of locations in the longitudinal direction.
The spacer is rotatably fitted in the circular hole of the bracket body. The spacer stands up from the concrete frame and passes through the anchor bolt inserted through the lower through hole and the circular hole, and extends from the center to the periphery of the circular hole. A hole and a flange that covers the surface of the bracket body,
A bracket for holding a pillar, which is fastened to a concrete frame by pressing a spacer with a nut screwed to an anchor bolt.

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