JPH0369416B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tensioning device for architectural brace bars that prevents tilting or slight vibrations of strength members such as framed columns and beams.

(Prior Art) As an example of the prior art, there is a structure shown in FIG.

That is, one end portions 1a, 2a of a pair of rod-shaped tension bars 1, 2 are screwed together via a tensioning device consisting of a turnbuckle 3, and connecting tools 4, 5 are attached to the other end portions 1b, 2b of each tension bar 1, 2. are fixed by welding, and on the other hand, brackets 8 and 9 are protruded and fixed to the columns 6 and 7 spaced apart from each other, and the joint tools 4 and
5 and brackets 8 and 9 are mutually superimposed and connected, and then the turnbuckle 3 is rotated in the tightening direction, thereby tensioning each tension bar 1 and 2 (Japanese Patent Application Laid-Open No. 76347/1983). .

(Problem to be solved by the invention) In the conventional tension bars 1 and 2, the turnbuckles 3 are used to connect the tension bars 1 and 2, so the turnbuckles 3 are tightened after each of the joints 4 and 5 and the brackets 8 and 9 are joined. By doing so, it is possible to prevent the tension bars 1 and 2 from loosening after assembly, which is desirable.

However, since the turnbuckle 3 is screwed in series with the tension bars 1 and 2, the tension generated in the tension bars 1 and 2 acts directly on the screwed connection where the joint strength is unstable. However, it had the disadvantage of poor reliability. That is, in general, threaded connections have large variations in processing accuracy, stress is concentrated in the thread troughs, and the threaded portions are deformed, resulting in poor joint strength reliability.

Further, since the turnbuckle is a joint between a threaded rod and a threaded hole, it has the disadvantage that it is difficult to use for tension members having a large cross-sectional area, such as shaped steel materials and flat steel materials.
SUMMARY OF THE INVENTION The object of the present invention is to obtain a new tensioning device for architectural brace bars that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.

Two sets of link units are provided in which a pair of link arms are rotatably connected by a connecting tool, and each of the link units is arranged in parallel, and both ends of each are connected to one end of one connector and the other connector. A tensioning device is provided, which is rotatably connected to one end of the link unit and operates the connecting tools of each link unit in the directions toward and away from each other using a screw, and the other end of each of the connecting tools is
A brace made of plate material and bent in the thickness direction into a truncated conical shape to form a joint, and a plate-shaped bracket and a brace made of an elongated plate member are attached to one and the other of the strength members spaced apart from each other. a bar, a joint part bent in the thickness direction and into a truncated conical shape is formed at one end of the bracket and the brace bar, and each joint part is fitted into a joint part of each of the joint tools to form a fastener. It is configured to be fastened in the fitting direction.

(Function) Since the present invention has the above-mentioned configuration, if the screws are operated to move the connecting devices of each link unit in the direction of separating them from each other, the brace bar is applied with a predetermined force via each connecting device. This will make you nervous. In this case, the connecting parts between each of the link units and the brace bar are fitted and connected from the thickness direction by joint parts where the plates are bent into a truncated cone shape, so the mold rigidity and the joint area are increased. It will withstand a large amount of tension.

Furthermore, since the screw is not directly connected to the strength member, even if the connection between the screw and the connection is damaged, the connection to the strength member is maintained by the link unit and brace bar. It turns out.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

First, in the drawings, FIG. 1 is a front view showing an example of a tensioning device for an architectural brace bar according to the present invention;
Figure 2 is a sectional view of the main part, and Figure 3 is the − of Figure 2.
FIG.

In Fig. 1, numerals 10 and 11 are pillars made of shaped steel that are spaced apart on the left and right and are fixed upright.
0 and 11, a beam 12 also made of shaped steel is constructed and fixed.

A steel plate bracket 13,
14 are fixed by welding, and these brackets 13, 14 are fixed by welding.
A tensioning device 15 and a brace bar 30 made of a long plate are connected in series and installed in between.

The tension device 15 includes link arms 16 and 17.
a first link unit A rotatably connected to each other via a connector 18 at one end; and a link arm 1.
9 and 20 are arranged in parallel with a second link unit B which is rotatably connected to each other via a connector 21 at one end, and both ends of each are rotatably connected by connectors 22 and 23. A screw tool 24 is placed between the tools 18 and 21.

The first and second link units A and B have substantially the same construction, and the main parts of the link unit A will be explained with reference to FIGS. 1 to 3.

That is, cylindrical locking pins 18a to 18a are provided on both ends and both surfaces of the connecting tool 18 formed in a plate shape, and on the inner ends and both surfaces of the connecting tools 22 and 23 formed in a plate shape.
18d, 22a, 22b, 23a, and 23b are stood up and fixed by welding.

On the other hand, four elongated link arms 16a, 16b, 17a, and 17b are formed, each having a bent U-shaped cross section and having arcuate walls at both ends.

Two link arms 16a, 16b are attached to each of the locking pins 22a, 22b provided at the inner end of the connector 22 and the locking pins 18a, 18b provided at one end of the connector 18. The two end portions are fitted with each other facing each other with their palms together, and each fitting portion is rotatably connected with a fastener 25 made of a bolt and nut through a washer 25a having a large diameter and a thick wall.

Similarly, the remaining link arms 17a, 17b are attached to the locking pins 23a, 23b provided at the inner end of the connector 23 and the locking pins 18c, 18d provided at the other end of the connector 18. The two end portions are fitted together with their respective ends facing each other in the shape of palms together, and each fitting portion is rotatably connected with a fastener 25 consisting of a bolt and nut through a thick and large diameter washer 25a. Configure link unit A.

In addition, the above-mentioned screw tool 24 bridges the threaded rod between the connecting tools 18 and 21 of each of the first and second link units A and B, and also screws one end of the threaded rod into one of the connecting tools 18. The other end is rotatably but not axially movably connected to the other connector 21, and the head is formed into a hexagonal column shape that can be engaged with a spanner.

As a result, the threaded rod is rotated in the forward and reverse directions to move the two connectors 18 and 21 toward and away from each other, thereby causing the tensioning device, that is, each of the first and second link units A and B, to expand and contract.

Here, the tension device 15 includes each joint tool 22,
The length of the screw tool 24 is made short so that the initial expansion angle at the 23 parts is small.

The first and second link units A and B are rotatably connected to the left ends of the left bracket 13 and right brace bar 30, respectively, via connectors 22 and 23 provided at the left and right ends. do.

The above left bracket 13 and connector 22
, the left end of the right brace bar 30 and the connector 2
The connectors with No. 3 have substantially the same configuration.

The structure of the above-mentioned connecting part will be explained with reference to FIG. 2, representing the left bracket 13 and connector 22. At the overlapping part of the bracket 13 and connector 22, there is a truncated cone-shaped joint facing in the thickness direction in the same direction. In other words, the joint portions 13a and 22c are formed by expanding into a bowl shape.

These joint parts 13a and 22c are formed by forming the joint part 13a on the side of the bracket 13 with a large diameter and the joint part 22c on the side of the joint tool 22 with a small diameter.
The joint part 22c on the side of the joining tool 22 is formed so as to fit closely into the inner surface of the joint part 13a on the side.

In addition, a small diameter fastening hole is drilled in the center of each of the joint parts 13a, 22c, and a fastener 26 consisting of a bolt and nut is used to connect the two through thick-walled and large-diameter washers 26a, 26b. Conclude polymerization.

A washer 26 provided on the outer surface of the top of the joint portion 13a
a has approximately the same area as the outer surface of the top and is formed to be slightly thicker than the bracket 13, and a washer 26b that overlaps the back surface of the top of the joint portion 22c has approximately the same area as the back surface of the top. In addition, it is formed to be slightly thinner than the joint tool 22.

In addition, the right end of the brace bar 30 and the bracket 14
The joining structure between the bracket 13 and the joining tool 22 is similar to the joining structure between the bracket 13 and the joining tool 22 described above.

Next, the operation of the above embodiment will be explained.

Tensioning device 15 is connected to bracket 13 and the left end of brace bar 30 via connectors 22 and 23, and the right end of brace bar 30 is connected to bracket 14.

Then, operate the screw tool 24 to connect the connecting tools 18 and 2.
1 are moved in a direction that separates them from each other.

Then, the tensioning device 15, that is, each of the first and second link units A, B, is shortened and tensioned.

As a result, the stopping power of the framed columns 10 and 11 against slight vibrations is increased over a long period of time, and vibrations and noise are reduced in response to strong winds or mild earthquakes.

In this case, since the initial expansion angles of each of the first and second link units A and B at the joints 22 and 23 are set small, the tension force is mainly applied to each of the first and second link units A. , B and the brace bar 30, and the compressive force generated in the screw tool 24 becomes small. Therefore, the load generated on the connecting portion (threaded portion) between the screw tool 24 and the connectors 18 and 21 is reduced, and even if the device is made small, it has durability over a long period of time.

Further, since the screw tool 24 is not directly connected to the columns 10, 11, a large load is generated on the columns 10, 11, and the spring tool 24 and the connecting tool 18,
21 is damaged, the first and second link units A, B, the brace bar 30 and the pillars 10, 1
1 will be maintained.

Further, each of the first and second link units A and B has a box-shaped end, and each of the locking pins 18a to 18
8d, 22a, 22b, 23a, 23b, and the connectors 22, 23, the bracket 13, the brace bar 30, and the brace bar 30.
The respective joint parts of the bracket 14 and the bracket 14 are bulged into a bowl shape and are closely fitted to each other, so that the mold rigidity is high and it can withstand a large tension even though it is a lightweight sheet metal material.

Note that the tensioning device 15 according to the present invention may be provided between divided brace bars.

(Effects of the Invention) As is clear from the above description, according to the present invention, the strength of the joint between the tensioning device and the brace bar and bracket provided on the strength member side is increased, and the initial tension force is maintained over a long period of time. This has the effect of being able to maintain the blocking force against slight vibrations of the framed strength member over a long period of time.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a tensioning device for an architectural brace bar according to an embodiment of the present invention, FIG. 2 is a sectional view of a main part thereof, and FIG.
The figure is a sectional view of a main part corresponding to FIG. 1 showing a conventional example. 10, 11: Column, 12: Beam, 13, 14: Bracket, 13a, 14a: Joint, 15: Tension device, A, B: First and second link units, 16,
17, 19, 20: Link arm, 18, 21:
Connector, 18a-18d: Locking pin, 22, 2
3: Connector, 22a, 22b, 23a, 23b:
Locking pin, 24: Screw, 25, 26: Fastener,
30: Brace bar.

Claims (1)

[Claims] 1. Two sets of link units each consisting of a pair of link arms rotatably connected by a connecting tool are provided, and each of the link units is arranged in parallel, and both ends of each are connected to one end of one connector and the other connector. A tensioning device is provided which is rotatably connected to one end of the link unit and operates the connecting tools of each link unit in directions toward and away from each other using a screw, and the other end of each of the connecting devices is formed of a plate material. At the same time, the plate material is bent in the thickness direction into a truncated conical shape to form a joint,
on one and the other of the strength members spaced apart from each other,
A plate-shaped bracket and a brace bar made of an elongated plate member are provided, and a joint part bent in the thickness direction in a truncated conical shape is formed at one end of the bracket and the brace bar, and each joint part is connected to each of the above-mentioned parts. A tension device for an architectural brace bar, characterized in that it is fitted into a joint part of a joint tool and fastened in the fitting direction by a fastener.