JPH0333848Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is suitable for use in curtain walls, greenhouses, etc.
This invention relates to a bracket connection bolt tightening device used to connect a frame such as a skylight to a building frame or foundation.

(Prior art) A curtain wall has a framework in which a large number of mullions are arranged in a row, and horizontal bars are installed between each mullion.
It is composed of a mullion and a horizontal beam, each with a plate of glass inserted into it, and is supported by connecting the mullion to the building frame. The connection consists of a primary bracket fixed to a base integrated into the building frame;
Using the secondary bracket fixed to the mullion, the primary,
Generally, a method is adopted in which both secondary brackets are fastened together using connecting bolts.

The position of the mullion can be adjusted by forming elongated bolt holes in both the primary and secondary brackets and the base, but adjusting the inclination requires separate means. That is, for example, if the base is incorrectly tilted and fixed to the building frame, the primary bracket bolted to it will tilt, and then by bolting the secondary bracket to the primary bracket, it will be possible to create a mullion with the secondary bracket. As a result of the curtain wall being tilted, the curtain wall is not exactly located on the same perpendicular plane;
The problem was that the surface was uneven and unsightly.

In addition to dimensional errors, such angular errors cannot be avoided during construction, so conventionally, a circular arc surface that rises toward the center is formed on one side of the washer through which the bolt is passed, and the washer is used for both primary and secondary purposes. A proposal has been made to use a washer to absorb angular errors on the circular arc surface and prevent angular errors from spreading to other areas by inserting the washer between brackets or between the bracket and the nut. 60-53996).

(Problem that the invention attempts to solve) The above invention has the advantage of being able to absorb angular errors in any direction of 360 degrees, but on the other hand, it has lost the function of the washer. However, there was an unavoidable structural disadvantage in that the object could not be stably supported to prevent it from moving. Angular errors often occur only in one direction, and in many cases it is sufficient to absorb angular errors in one direction. It is unnecessary to provide an absorption function.

(Means for solving the problem) From the above-mentioned viewpoint, this invention is designed to absorb the angle error in only one direction without sacrificing the function of the washer. It is an object of the present invention to provide a bolt tightening device for brackets that can provide a stable fastening state between brackets.

In order to achieve the above object, this invention is a device for tightening a bracket using a connecting bolt with a head and a nut, in which the angle of the other bracket can be adjusted on one side of one of the two brackets. A protrusion having a circular arc-shaped curved surface is provided as a fulcrum for receiving the bracket, and a groove having a circular circular curved surface is provided on the opposite side of the one surface of the one bracket, facing back to the protrusion, and a connecting bolt is inserted through the bracket. The gist is that a hole is formed to pass through from the groove to the protrusion, and the connecting bolt is formed in a T-shape with a head protruding to both sides to engage with the groove.

(Embodiment) Figures 1 to 3 show the use of the bracket bolting device of this invention to connect a mullion F of a curtain wall to a building frame B.
The bolt tightening device P includes a primary bracket 1,
A pair of left and right secondary brackets 2, 2, a pair of left and right connecting bolts 3, 3 nuts 4, 4 washers 5,
It consists of 5 (Figure 1).

The primary bracket 1 is a horizontally long rectangular plate facing toward the outside of the building, and has a mounting seat plate 1a protruding from its lower end. A bent portion 6 projecting to the front in a circular arc shape over the entire length is provided at the intermediate portion between the upper and lower portions by press working. That is, by forming the bent portion 6, a projection 6a having a circular arc-shaped curved surface is formed on the front surface, and a groove ridge 6b having a circular arc-shaped curved surface is formed on the rear surface. Further, in the bending part 6, the through holes 1b, 1b for the connecting bolts 3, 3 are provided horizontally in advance, and due to the deformation during formation of the bending part 6, the through holes 1b, 1b are formed in the grooves 6b.
The shape is expanded from the bottom of the protrusion 6b to the top of the protrusion 6b. The seat plate 1a is provided with long holes 1c, 1c for attachment.

The left and right pair of secondary brackets 2, 2 are slightly elongated plate-shaped bodies facing the front surface of the primary bracket 1, and both have mounting boards 2a protruding at right angles from opposing ends. . A vertically elongated through hole 2b for the connecting bolt 3 is provided in the center, and a round hole 2c for attachment is provided in the substrate 2a.

The connecting bolts 3, 3 have a T-shaped head 3a projecting to both sides, and since the head 3a has a circular shaft shape, the connecting bolt 3 has a curved surface 3b on the entire circumferential surface. The nuts 4, 4 and washers 5, 5 have a general shape, and the washer 5 is a rectangular plate.

To connect the mullion F to the building frame B using the above bolting device (Fig. 2), first secure the secondary bracket 2 to the mullion F, then attach the primary bracket 1 to the secondary bracket 2. Building frame B while matching
The connecting bolt 3 is inserted through the intersection of the through holes 1b and 2b of the primary bracket 1 and the secondary bracket 2 (Fig. 3), and the washer 5 is passed through the tip of the connecting bolt 3. Screw on nut 4 and tighten.

Various forms of angle error can be considered, but in the case of Fig. 2, the base 7 is attached to the building frame B with a slight forward inclination, and on the top surface of the base 7 are bolts 8 for attaching the primary bracket 1. The primary bracket 1 is installed by passing the elongated hole 1c of the seat plate 1a through the mounting bolt 8 and tightening it with the nut 8a, so that the primary bracket 1 is mounted with a forward slope at the same angle as the slope of the base 7. Become.

If the primary bracket 1 is slightly tilted forward like this, it will come into contact with the secondary bracket 2 at the arc-shaped protrusion 6a, so even if the nut 4 is tightened, the force will be applied to both brackets 1, It does not act to bring the two faces together. Furthermore, since the connecting bolt 3 can freely rotate up and down around the head 3a, although only within a small range, when the nut 4 is tightened, the washer 5 is joined to the secondary bracket 2, so that the front slope of the primary bracket 1 is does not affect the secondary bracket 2. That is, even if there is an error in the fixing angle of the base 7, the mullion F can be fixed vertically regardless of the angle, and the angle of the mullion F can also be corrected.

Further, since the head 3a of the connecting bolt 3 is engaged with the groove 6b of the primary bracket 1, the nut 4
When tightening, the grooved bolt 6b serves to prevent the connecting bolt 3 from rotating.

Figures 4 and 5 are diagrams of other embodiments of the present invention,
The base Fb that supports the bottom frame Fa of the greenhouse glass window is a cloth foundation.
The bracket bolt tightening device of this invention was used to connect it to Ba. The bolt tightening device P is the same in that it consists of a primary bracket 1, a secondary bracket 2, a connecting bolt 3, a nut 4, and a washer 5 (Fig. 4), but is opposite to the above embodiment. On the other hand, the secondary bracket 2 is provided with a protrusion 6a and a groove 6b formed by the bent portion 6. That is, even if the base 7 is installed on the cloth foundation Ba with a slight inclination toward the outside due to a construction error, the foundation Fb can be installed at a horizontal correct angle despite the inclination.

(Effects of the invention) As explained above, according to this invention, by providing on one surface of one bracket a protrusion having an arcuate curved surface that serves as a fulcrum for receiving the other bracket in an adjustable angle, Since both brackets can be connected by adjusting the angle in the direction perpendicular to the longitudinal direction of the protrusion, errors in construction angles in buildings and structures can be absorbed by the connection, and errors in other parts can be avoided. In addition, the washer and nut can be evenly pressed against the bracket without the need to use an unstable washer, so that a stable fastening state between the brackets can be obtained. Furthermore, since the rotation of the connecting bolt is prevented by the engagement between the head and the groove when tightening the nut, there is an excellent effect that it is easy to tighten the nut and is convenient for work. Another advantage is that the inclination of curtain walls, glass windows, etc. supported by brackets can be corrected to be straight and perpendicular.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment, where Figure 1 is an exploded perspective view, Figure 2 is a side view showing the curtain wall mullion attached to the building frame, and Figure 3 is a side view showing the curtain wall mullions attached to the building frame.
The figure is an enlarged sectional view of part A in Figure 2, Figures 4 and 5 show other embodiments of the present invention, Figure 4 is an exploded perspective view, and Figure 5 is a support for the lower frame of the greenhouse glass window. FIG. 3 is a side view showing a state in which the base is attached to a cloth foundation. 1, 2...Bracket, 1b...Through hole, 3...
...Connection bolt, 3a...Head, 4...Nut, 6
a... Projection, 6b... Groove.

Claims (1)

[Scope of utility model registration request] It is a device for tightening brackets 1 and 2 using a connecting bolt 3 with a head and a nut 4, and a circle serving as a fulcrum for receiving the other bracket 2 in an adjustable angle is provided on one surface of one of the brackets 1. A protrusion 6a having an arc-shaped curved surface is provided, and a groove 6b having an arc-shaped curved surface is provided on the opposite side of the one surface of the one bracket, facing back to the protrusion, and a through hole 1b for a connecting bolt in the bracket 1 is provided. is formed to pass through from the groove 6b to the protrusion 6a, and the connecting bolt 3 is formed in a T-shape with the head 3a protruding to both sides to engage with the groove 6b. tightening device.