JP6501219B2 - Brace with tension adjustment - Google Patents

Description

This invention is suitable architectural brace relates brace formed by connecting the brace body, such as round bars Tsutomu Cho adjusting device.

  The steel frame frame is a frame structure in which steel frame columns and steel frame beams which are main structural members are rigidly connected, and is a frame format widely adopted for small and medium-sized steel frame buildings and the like. In such a frame, in order to improve the earthquake resistance of the building, it is general to attach a brace at a diagonal position of a rectangular frame surface surrounded by steel columns and steel beams. The braces used herein are, for example, as a tension member constituting the brace body, a pair of round steels with right-handed screw (positive screw) formed at the end and a pair of left-handed screw (reverse screw) formed at the end Round steel (referred to as a turnbuckle bolt) is used, and these round steels are screwed close to or away from each other through a pair of female screws provided at both ends, thereby adjusting the entire length of the tension member and tension. It consists of a turnbuckle barrel for adjusting the The turnbuckle cylinder is roughly divided into a split frame type and a pipe type, and both are configured to rotate and tighten the turnbuckle cylinder and to reverse and loosen it.

  By the way, in order to miniaturize the turnbuckle cylinder in the above-mentioned building brace and to improve the appearance, a tension adjusting means has been proposed instead (see Patent Document 1). This turnbuckle forms a right-handed screw portion and a left-handed screw portion at both ends, and a columnar body provided with a spanner hooking portion such as a hexagonal pillar in the middle And a tensile member such as a steel pipe is joined to the other end side of each rod portion. Therefore, when the tension adjustment of the tension member is performed by the rotation of the barrel, a spanner fitted to the spanner hook at the center of the barrel is used. In this case, as the tensile strength required for the brace increases, the outer diameter of the entire body including the spanner hook necessarily increases, and the weight of the brace body also increases. For this reason, the corresponding spanner has to be a considerable weight. In addition, the installation of braces in a steel frame is often an operation at a high place, and there is a problem that the handling becomes an extremely dangerous operation. In addition, screwing on both ends of a large-sized brace body is very expensive and uneconomical.

JP 6-313411 A

The present invention has been made in view of the problems of the prior art, and in addition to the dimensional adjustment of the entire brace, the tension adjustment can be easily performed with a lightweight tool, which is economical, compact, aesthetic and economical. it is an object to provide a brace having a tensioning device which is improved.

In order to solve the above-mentioned problems of the prior art, the brace according to claim 1 has one end side of a hook-like tool hooking portion in which a plurality of grooves are formed on the circumferential surface at substantially equal intervals along the axial direction. And a bolt body having a right screw portion and a left screw portion on the other end side, and one female screw member and the other female screw member respectively engaged with the right screw portion and the left screw portion of the bolt body; A tension adjusting device for moving the pair of female screw members closer to or away from each other by rotation of the tool hooking portion, and a brace body attached to at least one female screw member of the tension controller, and axially separated the tubular member is covered so as to extend over between a pair of internally threaded member of the tension adjusting device and is characterized that you fill the grout into the gap portion from the opening of the cylindrical member. Furthermore, in this brace, the outer diameters of the tool retaining portion and the pair of female screw members may be substantially the same (claim 2 ).

In the brace provided with the tension adjusting device according to the present invention, the following effects can be obtained by adopting the above configuration.
(1) When adjusting the entire length of the brace by displacing a pair of female screw members screwed to both sides of the bolt body in directions approaching or separating from each other, the tension of the tension member is adjusted after installation on the steel frame. In such cases, instead of using a conventional spanner, a screw driver (screw driver) or a Shino etc. may be inserted into the groove formed on the circumferential surface of the tool hook and rotated, so it is relatively lightweight. You can work safely at high places by using tools.
(2) When the outside diameter of the tool hooking part of the tension adjusting device and the pair of female screw members located on both sides of the tool hooking part are made almost the same, the appearance is improved because the appearance is improved. Suitable for places.
(3) In the brace installed in a predetermined tension state, when a gap is present between the tool hooking portion of the bolt main body and the end face of the female screw member, the axial direction of the pair of female screw members It is possible to fill the void portion inside the tension adjusting device by covering the divided cylindrical member so as to straddle both and injecting the grout material from the opening of the cylindrical member into the inside. At this time, the grooves formed on the circumferential surface of the tool hooking part assist the free flow of the grout material and enhance the filling effect. As a result, it is possible to effectively prevent stress concentration on a specific part in the tension adjusting device, in particular to the external thread portion where the cross-sectional area is minimized, and also to prevent loosening.

It is the front view and side view of the bolt main body used by this invention. The bolt body of FIG. 1 is a front view and a side view of a tensioning device that is used in the present invention obtained by screwing a pair of internally threaded members. It is the front view and top view of the brace which concerns on the 1st foundation form of this invention which combines a brace main body with the tension adjustment apparatus of FIG. It is the front view of the brace concerning the 2nd foundation form of the present invention, and the top view which showed a part in section. It is a front view and a top view of a brace concerning the 3rd foundation form of the present invention. It is the top view which showed the principal part of the brace based on this invention which made the 2nd foundation form object . It is a perspective view of the cylindrical member used by the brace of FIG.

Tensioning equipment that is used in the present invention, when performing the tension adjustment after length adjustment or mounting of the entire brace against groove provided in the tool engaging portion of the bolt body, tightening the screw driver or track number There is a technical feature in the point that it can insert and rotate simple lightweight tools such as Sino used in the case. The tool hooking portion may be integrally formed with the bolt main body by cutting, forging, or the like, or may be fitted as a separate part. The number of grooves for inserting the above-mentioned tool is preferably about four or six at approximately equal intervals on the circumference. The outer diameter is particularly preferably approximately the same as the outer diameter of a pair of female screw members screwed to both ends. Furthermore, after both ends of the brace were connected to the steel frame, the internal thread members located on both sides of the bolt main body were divided in a state where a steel tubular member having an inner diameter corresponding to the outer diameter was covered. A grout material such as high strength non-shrinkage cement may be injected into the inside from the opening.

  In addition, for the brace main body connected to the tension adjustment device to constitute the brace, a bar steel or steel pipe having a circular or rectangular cross section is suitable, and it may be appropriately selected depending on whether it is used as a tension brace or a compression brace. Good. When these braces are pin-joined to the corner portion of the frame surface, clevis or bolt for pin can be used as a joining member provided at the end of the brace body. The brace body may be connected to at least one side of the tension adjusting device. In this case, the other end of the tension adjusting device is connected to the end joint member. Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments, and various modifications within the technical concept of the present invention are of course possible.

Figure 1 (a), (b) is a front view and a side view of the main member Der Ru bolt body tensioning device for use in braces according to the present invention, respectively. The illustrated bolt main body 1 has a left side (one end side) and a right side (the other end side) of the tool hooking portion 2 protruding like a hook at the center, formed in the right side thread portion 3 and the left side thread portion 4 respectively. is there. The tool hooking portion 2 is provided with four grooves 2a having a U-shaped cross section along the axial direction at intervals of approximately 90 ° on the circumference.

FIGS. 2 (a) and 2 (b) are respectively a front view and a side view of a tension adjusting device used in a brace according to the present invention. The tension adjusting device 5 is composed of the bolt main body 1 and a pair of female screw members 6 and 7 shown in FIG. In this case, one female screw member 6 and the other female screw member 7 respectively screwed to the right screw portion 3 and the left screw portion 4 of the bolt main body 1 are formed in a cylindrical shape with female screws provided over the entire length. It is possible to screw in the round steel brace body. Further, the outer diameter of the pair of female screw members 6 and 7 is formed to be substantially the same as the outer diameter of the tool hooking portion 2 of the bolt main body 1. The pair of female screw members 6 and 7 may not be through holes depending on the shapes of the brace main body and the end joint member coupled thereto and the coupling method, and the total length may be different.

FIGS. 3 (a) and 3 (b) are a front view and a plan view showing a first basic form of a brace according to the present invention suitable for a tensile brace. The brace 10 connects the brace main body 11 made of flat steel to one end side of the bolt main body 1 in the tension adjustment device 5 shown in FIG. 2 and is joined to the corner portion of the rectangular structure surface at the other end side. A plate-like end joining member 12 for pin joining to a gusset plate or the like is joined. The brace main body 11 and the end joint member 12 are welded in a state in which the female screw members 6 and 7 are respectively fitted in rectangular notches (not shown) formed on the tension adjustment device 5 side. Furthermore, pin insertion holes 11 a and 12 a are formed in the opposite end portion of the brace body 11 and the end portion joint member 12, respectively.

FIGS. 4 (a) and 4 (b) are a front view showing a second basic form of a brace according to the present invention, which is also suitable for a tensile brace, and a plan view partially showing it in cross section. The illustrated brace 20 uses round steel for the brace body 21. In this case, one female screw member 6a screwed to one end side of the tension adjusting device 5 has a total length longer than the other female screw member 7, and the male screw portion 21a formed at the end of the brace body 21 is screwed. There is. The opposite end of the brace body 21 and the other female screw member 7 are welded in the same manner as described above to end joint members 22 and 23 having pin insertion holes 22a and 23a, respectively.

FIGS. 5 (a) and 5 (b) are a front view and a plan view showing a third basic form of the brace according to the present invention suitable for the compression brace. The illustrated brace 30 has a tension adjusting device 9 in which holed disc-like flange members 8c and 8d are joined to the opposing end surfaces of a pair of female screw members 8a and 8b screwed to the bolt main body 1, and a round steel pipe And the brace body 31. A pair of end joining members 32 is welded to one female screw member 8a on both sides thereof so as to sandwich the female screw member 8a, and the end face is also welded to the flange member 8c. Further, a round steel pipe 31 is joined to the other female screw member 8b by welding the end face thereof and the flange member 8d in a state in which it is contained. Furthermore, an end joint member 33 consisting of a pair of two pieces is also welded to the flange member 8 e on the end face of the round steel pipe 31 on the other end side of the brace body 31. The periphery of the pin insertion holes 32a and 33a of the end joint members 32 and 33 is reinforced to be thicker than the other portions, similarly to the brace of the first basic form shown in FIG. The bolt body used in FIG. 5 may be screwed using a thick steel pipe.

In each of the above basic forms, the length of the braces 10, 20, 30 is obtained by inserting and rotating a rod-like tool such as a screw driver or shino into the groove 2a formed in the bolt main body 1 of the tension adjusting device 5, 9. Adjustment is easy, and its slack and slack are eliminated, and tension can be introduced into the brace.

FIG. 6 is a plan view showing the main part of a brace according to the present invention for the second basic form , and FIG. 7 is a perspective view of a cylindrical member used in the same brace. The illustrated brace 40 is a cylindrical member 41 made of steel, which is divided in the axial direction at an inner diameter substantially the same as the outer diameter of the female screw members 6, 7a with respect to the tension adjusting device 5 after the installation to the steel frame is completed. The cover is placed so as to straddle the pair of female screw members 6 and 7a while opening it, and a grout material 42 made of high-strength non-shrinkage cement or the like is injected from the opening 41a. This makes it possible to protect and cure the male screw parts 3 and 4 of the bolt main body 1. At the time of injection, since the flow of the grout material 42 is smoothly performed by the presence of the plurality of grooves 2 a formed on the circumferential surface of the tool retaining portion 2, the injection effect can be enhanced. In the case of the third basic embodiment of Figure 5, the flange member 8c, rather I if so the tubular member 41 covers the 8d, as shown in FIG. 6 in the case of applying the first basic embodiment of Figure 3 not good if Kabusere the cylindrical member 41. In the brace of the present invention, the change in cross-sectional area is large between the end faces of the pair of female screw members 6 (6a) and 7 (7a) in the tension adjusting devices 5 and 9 and is also the place where the outer diameter is the smallest. For this reason, by filling the grout material 42 in the said part, it is effective in preventing generation | occurrence | production of complicated stress, such as bending lateral stress at the time of an earthquake, and preventing stress concentration to male screw parts 3 and 4.

1: Bolt body 2: Tool retaining portion 2a: Groove 3: 3: Right screw portion 4: Left screw portion 5, 9: Tension adjusting device 6, 6a, 7, 7a, 8a, 8b: Female screw member , 8c, 8d, 8e: flange members, 10, 20, 30, 40: braces, 11, 21, 31: brace bodies, 12, 22, 22, 23, 32, 33: end joint members, 41: cylindrical members, 42: Grout

Claims (2)

A bolt body having a right-handed thread and a left-handed thread at one end and the other end of a hook-like tool hooking portion in which a plurality of grooves are formed on the circumferential surface at substantially equal intervals along the axial direction; It consists of one female screw member and the other female screw member screwed respectively to the right screw part and left screw part of this bolt body, and the pair of female screw members are made to approach or separate by rotation of the tool hook of the bolt body. A tension adjusting device, and a brace body attached to at least one of the female screw members of the tension adjusting device, and the axially divided cylindrical member is straddled between a pair of female screw members of the tension adjuster. covered, braces characterized that you fill the grout into the gap portion from the opening of the cylindrical member. The brace according to claim 1, wherein the outer diameters of the tool hook portion and the pair of female screw members are substantially the same.

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